Swiftdiff options
| author | Tobias Markmann <tm@ayena.de> | 2018-03-20 13:12:10 (GMT) |
|---|---|---|
| committer | Tobias Markmann <tm@ayena.de> | 2018-03-20 14:48:04 (GMT) |
| commit | f2c2c7d035029fb9615b42c18ccea83e8e705b10 (patch) | |
| tree | 2f56fb77de0f366528395f21732d418f016f63b5 /3rdParty/Breakpad/src/common/dwarf | |
| parent | 44581c5285d13c0ec715b35ddc79177e5ebeef39 (diff) | |
| parent | 5ba3f18ad8efa040d49f36d83ec2e7891a9add9f (diff) | |
| download | swift-swift-5.0alpha2.zip swift-swift-5.0alpha2.tar.bz2 | |
Merge branch 'swift-4.x'swift-5.0alpha2
* swift-4.x: (44 commits)
Test-Information:
Builds on macOS 10.13.3 with clang trunk.
Change-Id: If50381f103b0ad18d038b920d3d43537642141cb
Diffstat (limited to '3rdParty/Breakpad/src/common/dwarf')
20 files changed, 7718 insertions, 250 deletions
diff --git a/3rdParty/Breakpad/src/common/dwarf/bytereader-inl.h b/3rdParty/Breakpad/src/common/dwarf/bytereader-inl.h index 3c16708..42c92f9 100644 --- a/3rdParty/Breakpad/src/common/dwarf/bytereader-inl.h +++ b/3rdParty/Breakpad/src/common/dwarf/bytereader-inl.h @@ -32,16 +32,15 @@ #include "common/dwarf/bytereader.h" #include <assert.h> +#include <stdint.h> namespace dwarf2reader { -inline uint8 ByteReader::ReadOneByte(const char* buffer) const { +inline uint8 ByteReader::ReadOneByte(const uint8_t *buffer) const { return buffer[0]; } -inline uint16 ByteReader::ReadTwoBytes(const char* signed_buffer) const { - const unsigned char *buffer - = reinterpret_cast<const unsigned char *>(signed_buffer); +inline uint16 ByteReader::ReadTwoBytes(const uint8_t *buffer) const { const uint16 buffer0 = buffer[0]; const uint16 buffer1 = buffer[1]; if (endian_ == ENDIANNESS_LITTLE) { @@ -51,9 +50,7 @@ inline uint16 ByteReader::ReadTwoBytes(const char* signed_buffer) const { } } -inline uint64 ByteReader::ReadFourBytes(const char* signed_buffer) const { - const unsigned char *buffer - = reinterpret_cast<const unsigned char *>(signed_buffer); +inline uint64 ByteReader::ReadFourBytes(const uint8_t *buffer) const { const uint32 buffer0 = buffer[0]; const uint32 buffer1 = buffer[1]; const uint32 buffer2 = buffer[2]; @@ -65,9 +62,7 @@ inline uint64 ByteReader::ReadFourBytes(const char* signed_buffer) const { } } -inline uint64 ByteReader::ReadEightBytes(const char* signed_buffer) const { - const unsigned char *buffer - = reinterpret_cast<const unsigned char *>(signed_buffer); +inline uint64 ByteReader::ReadEightBytes(const uint8_t *buffer) const { const uint64 buffer0 = buffer[0]; const uint64 buffer1 = buffer[1]; const uint64 buffer2 = buffer[2]; @@ -89,12 +84,12 @@ inline uint64 ByteReader::ReadEightBytes(const char* signed_buffer) const { // information, plus one bit saying whether the number continues or // not. -inline uint64 ByteReader::ReadUnsignedLEB128(const char* buffer, +inline uint64 ByteReader::ReadUnsignedLEB128(const uint8_t *buffer, size_t* len) const { uint64 result = 0; size_t num_read = 0; unsigned int shift = 0; - unsigned char byte; + uint8_t byte; do { byte = *buffer++; @@ -114,12 +109,12 @@ inline uint64 ByteReader::ReadUnsignedLEB128(const char* buffer, // Read a signed LEB128 number. These are like regular LEB128 // numbers, except the last byte may have a sign bit set. -inline int64 ByteReader::ReadSignedLEB128(const char* buffer, +inline int64 ByteReader::ReadSignedLEB128(const uint8_t *buffer, size_t* len) const { int64 result = 0; unsigned int shift = 0; size_t num_read = 0; - unsigned char byte; + uint8_t byte; do { byte = *buffer++; @@ -134,18 +129,18 @@ inline int64 ByteReader::ReadSignedLEB128(const char* buffer, return result; } -inline uint64 ByteReader::ReadOffset(const char* buffer) const { +inline uint64 ByteReader::ReadOffset(const uint8_t *buffer) const { assert(this->offset_reader_); return (this->*offset_reader_)(buffer); } -inline uint64 ByteReader::ReadAddress(const char* buffer) const { +inline uint64 ByteReader::ReadAddress(const uint8_t *buffer) const { assert(this->address_reader_); return (this->*address_reader_)(buffer); } inline void ByteReader::SetCFIDataBase(uint64 section_base, - const char *buffer_base) { + const uint8_t *buffer_base) { section_base_ = section_base; buffer_base_ = buffer_base; have_section_base_ = true; diff --git a/3rdParty/Breakpad/src/common/dwarf/bytereader.cc b/3rdParty/Breakpad/src/common/dwarf/bytereader.cc index 6802026..14b43ad 100644 --- a/3rdParty/Breakpad/src/common/dwarf/bytereader.cc +++ b/3rdParty/Breakpad/src/common/dwarf/bytereader.cc @@ -27,6 +27,7 @@ // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #include <assert.h> +#include <stdint.h> #include <stdlib.h> #include "common/dwarf/bytereader-inl.h" @@ -62,7 +63,7 @@ void ByteReader::SetAddressSize(uint8 size) { } } -uint64 ByteReader::ReadInitialLength(const char* start, size_t* len) { +uint64 ByteReader::ReadInitialLength(const uint8_t *start, size_t* len) { const uint64 initial_length = ReadFourBytes(start); start += 4; @@ -100,7 +101,7 @@ bool ByteReader::UsableEncoding(DwarfPointerEncoding encoding) const { } } -uint64 ByteReader::ReadEncodedPointer(const char *buffer, +uint64 ByteReader::ReadEncodedPointer(const uint8_t *buffer, DwarfPointerEncoding encoding, size_t *len) const { // UsableEncoding doesn't approve of DW_EH_PE_omit, so we shouldn't @@ -129,7 +130,7 @@ uint64 ByteReader::ReadEncodedPointer(const char *buffer, // Round up to the next boundary. uint64 aligned = (offset + AddressSize() - 1) & -AddressSize(); // Convert back to a pointer. - const char *aligned_buffer = buffer_base_ + (aligned - skew); + const uint8_t *aligned_buffer = buffer_base_ + (aligned - skew); // Finally, store the length and actually fetch the pointer. *len = aligned_buffer - buffer + AddressSize(); return ReadAddress(aligned_buffer); @@ -242,4 +243,8 @@ uint64 ByteReader::ReadEncodedPointer(const char *buffer, return pointer; } +Endianness ByteReader::GetEndianness() const { + return endian_; +} + } // namespace dwarf2reader diff --git a/3rdParty/Breakpad/src/common/dwarf/bytereader.h b/3rdParty/Breakpad/src/common/dwarf/bytereader.h index e389427..59d4303 100644 --- a/3rdParty/Breakpad/src/common/dwarf/bytereader.h +++ b/3rdParty/Breakpad/src/common/dwarf/bytereader.h @@ -31,7 +31,10 @@ #ifndef COMMON_DWARF_BYTEREADER_H__ #define COMMON_DWARF_BYTEREADER_H__ +#include <stdint.h> + #include <string> + #include "common/dwarf/types.h" #include "common/dwarf/dwarf2enums.h" @@ -59,22 +62,22 @@ class ByteReader { // Read a single byte from BUFFER and return it as an unsigned 8 bit // number. - uint8 ReadOneByte(const char* buffer) const; + uint8 ReadOneByte(const uint8_t *buffer) const; // Read two bytes from BUFFER and return them as an unsigned 16 bit // number, using this ByteReader's endianness. - uint16 ReadTwoBytes(const char* buffer) const; + uint16 ReadTwoBytes(const uint8_t *buffer) const; // Read four bytes from BUFFER and return them as an unsigned 32 bit // number, using this ByteReader's endianness. This function returns // a uint64 so that it is compatible with ReadAddress and // ReadOffset. The number it returns will never be outside the range // of an unsigned 32 bit integer. - uint64 ReadFourBytes(const char* buffer) const; + uint64 ReadFourBytes(const uint8_t *buffer) const; // Read eight bytes from BUFFER and return them as an unsigned 64 // bit number, using this ByteReader's endianness. - uint64 ReadEightBytes(const char* buffer) const; + uint64 ReadEightBytes(const uint8_t *buffer) const; // Read an unsigned LEB128 (Little Endian Base 128) number from // BUFFER and return it as an unsigned 64 bit integer. Set LEN to @@ -93,7 +96,7 @@ class ByteReader { // In other words, we break VALUE into groups of seven bits, put // them in little-endian order, and then write them as eight-bit // bytes with the high bit on all but the last. - uint64 ReadUnsignedLEB128(const char* buffer, size_t* len) const; + uint64 ReadUnsignedLEB128(const uint8_t *buffer, size_t *len) const; // Read a signed LEB128 number from BUFFER and return it as an // signed 64 bit integer. Set LEN to the number of bytes read. @@ -112,7 +115,7 @@ class ByteReader { // In other words, we break VALUE into groups of seven bits, put // them in little-endian order, and then write them as eight-bit // bytes with the high bit on all but the last. - int64 ReadSignedLEB128(const char* buffer, size_t* len) const; + int64 ReadSignedLEB128(const uint8_t *buffer, size_t *len) const; // Indicate that addresses on this architecture are SIZE bytes long. SIZE // must be either 4 or 8. (DWARF allows addresses to be any number of @@ -135,7 +138,7 @@ class ByteReader { // Read an address from BUFFER and return it as an unsigned 64 bit // integer, respecting this ByteReader's endianness and address size. You // must call SetAddressSize before calling this function. - uint64 ReadAddress(const char* buffer) const; + uint64 ReadAddress(const uint8_t *buffer) const; // DWARF actually defines two slightly different formats: 32-bit DWARF // and 64-bit DWARF. This is *not* related to the size of registers or @@ -172,14 +175,14 @@ class ByteReader { // - The 32-bit value 0xffffffff, followed by a 64-bit byte count, // indicating that the data whose length is being measured uses // the 64-bit DWARF format. - uint64 ReadInitialLength(const char* start, size_t* len); + uint64 ReadInitialLength(const uint8_t *start, size_t *len); // Read an offset from BUFFER and return it as an unsigned 64 bit // integer, respecting the ByteReader's endianness. In 32-bit DWARF, the // offset is 4 bytes long; in 64-bit DWARF, the offset is eight bytes // long. You must call ReadInitialLength or SetOffsetSize before calling // this function; see the comments above for details. - uint64 ReadOffset(const char* buffer) const; + uint64 ReadOffset(const uint8_t *buffer) const; // Return the current offset size, in bytes. // A return value of 4 indicates that we are reading 32-bit DWARF. @@ -234,7 +237,7 @@ class ByteReader { // is BUFFER_BASE. This allows us to find the address that a given // byte in our buffer would have when loaded into the program the // data describes. We need this to resolve DW_EH_PE_pcrel pointers. - void SetCFIDataBase(uint64 section_base, const char *buffer_base); + void SetCFIDataBase(uint64 section_base, const uint8_t *buffer_base); // Indicate that the base address of the program's ".text" section // is TEXT_BASE. We need this to resolve DW_EH_PE_textrel pointers. @@ -273,13 +276,15 @@ class ByteReader { // base address this reader hasn't been given, so you should check // with ValidEncoding and UsableEncoding first if you would rather // die in a more helpful way. - uint64 ReadEncodedPointer(const char *buffer, DwarfPointerEncoding encoding, + uint64 ReadEncodedPointer(const uint8_t *buffer, + DwarfPointerEncoding encoding, size_t *len) const; + Endianness GetEndianness() const; private: // Function pointer type for our address and offset readers. - typedef uint64 (ByteReader::*AddressReader)(const char*) const; + typedef uint64 (ByteReader::*AddressReader)(const uint8_t *) const; // Read an offset from BUFFER and return it as an unsigned 64 bit // integer. DWARF2/3 define offsets as either 4 or 8 bytes, @@ -302,7 +307,7 @@ class ByteReader { bool have_section_base_, have_text_base_, have_data_base_; bool have_function_base_; uint64 section_base_, text_base_, data_base_, function_base_; - const char *buffer_base_; + const uint8_t *buffer_base_; }; } // namespace dwarf2reader diff --git a/3rdParty/Breakpad/src/common/dwarf/bytereader_unittest.cc b/3rdParty/Breakpad/src/common/dwarf/bytereader_unittest.cc new file mode 100644 index 0000000..e66062d --- /dev/null +++ b/3rdParty/Breakpad/src/common/dwarf/bytereader_unittest.cc @@ -0,0 +1,707 @@ +// Copyright (c) 2010, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com> + +// bytereader_unittest.cc: Unit tests for dwarf2reader::ByteReader + +#include <stdint.h> + +#include <string> + +#include "breakpad_googletest_includes.h" +#include "common/dwarf/bytereader.h" +#include "common/dwarf/bytereader-inl.h" +#include "common/dwarf/cfi_assembler.h" +#include "common/using_std_string.h" + +using dwarf2reader::ByteReader; +using dwarf2reader::DwarfPointerEncoding; +using dwarf2reader::ENDIANNESS_BIG; +using dwarf2reader::ENDIANNESS_LITTLE; +using google_breakpad::CFISection; +using google_breakpad::test_assembler::Label; +using google_breakpad::test_assembler::kBigEndian; +using google_breakpad::test_assembler::kLittleEndian; +using google_breakpad::test_assembler::Section; +using testing::Test; + +struct ReaderFixture { + string contents; + size_t pointer_size; +}; + +class Reader: public ReaderFixture, public Test { }; +class ReaderDeathTest: public ReaderFixture, public Test { }; + +TEST_F(Reader, SimpleConstructor) { + ByteReader reader(ENDIANNESS_BIG); + reader.SetAddressSize(4); + CFISection section(kBigEndian, 4); + section + .D8(0xc0) + .D16(0xcf0d) + .D32(0x96fdd219) + .D64(0xbbf55fef0825f117ULL) + .ULEB128(0xa0927048ba8121afULL) + .LEB128(-0x4f337badf4483f83LL) + .D32(0xfec319c9); + ASSERT_TRUE(section.GetContents(&contents)); + const uint8_t *data = reinterpret_cast<const uint8_t *>(contents.data()); + EXPECT_EQ(0xc0U, reader.ReadOneByte(data)); + EXPECT_EQ(0xcf0dU, reader.ReadTwoBytes(data + 1)); + EXPECT_EQ(0x96fdd219U, reader.ReadFourBytes(data + 3)); + EXPECT_EQ(0xbbf55fef0825f117ULL, reader.ReadEightBytes(data + 7)); + size_t leb128_size; + EXPECT_EQ(0xa0927048ba8121afULL, + reader.ReadUnsignedLEB128(data + 15, &leb128_size)); + EXPECT_EQ(10U, leb128_size); + EXPECT_EQ(-0x4f337badf4483f83LL, + reader.ReadSignedLEB128(data + 25, &leb128_size)); + EXPECT_EQ(10U, leb128_size); + EXPECT_EQ(0xfec319c9, reader.ReadAddress(data + 35)); +} + +TEST_F(Reader, ValidEncodings) { + ByteReader reader(ENDIANNESS_LITTLE); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_absptr))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_omit))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_aligned))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_uleb128))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata2))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata4))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata8))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sleb128))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata2))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata4))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata8))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_absptr | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_uleb128 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata2 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata4 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata8 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sleb128 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata2 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata4 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata8 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_absptr | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_uleb128 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata2 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata4 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata8 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sleb128 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata2 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata4 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata8 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_absptr | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_uleb128 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata2 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata4 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata8 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sleb128 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata2 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata4 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata8 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_absptr | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_uleb128 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata2 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata4 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_udata8 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sleb128 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata2 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata4 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_sdata8 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_absptr | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_uleb128 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata2 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata4 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata8 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sleb128 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata2 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata4 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata8 | + dwarf2reader::DW_EH_PE_pcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_absptr | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_uleb128 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata2 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata4 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata8 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sleb128 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata2 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata4 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata8 | + dwarf2reader::DW_EH_PE_textrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_absptr | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_uleb128 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata2 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata4 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata8 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sleb128 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata2 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata4 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata8 | + dwarf2reader::DW_EH_PE_datarel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_absptr | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_uleb128 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata2 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata4 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_udata8 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sleb128 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata2 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata4 | + dwarf2reader::DW_EH_PE_funcrel))); + EXPECT_TRUE(reader.ValidEncoding( + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect | + dwarf2reader::DW_EH_PE_sdata8 | + dwarf2reader::DW_EH_PE_funcrel))); + + EXPECT_FALSE(reader.ValidEncoding(DwarfPointerEncoding(0x05))); + EXPECT_FALSE(reader.ValidEncoding(DwarfPointerEncoding(0x07))); + EXPECT_FALSE(reader.ValidEncoding(DwarfPointerEncoding(0x0d))); + EXPECT_FALSE(reader.ValidEncoding(DwarfPointerEncoding(0x0f))); + EXPECT_FALSE(reader.ValidEncoding(DwarfPointerEncoding(0x51))); + EXPECT_FALSE(reader.ValidEncoding(DwarfPointerEncoding(0x60))); + EXPECT_FALSE(reader.ValidEncoding(DwarfPointerEncoding(0x70))); + EXPECT_FALSE(reader.ValidEncoding(DwarfPointerEncoding(0xf0))); + EXPECT_FALSE(reader.ValidEncoding(DwarfPointerEncoding(0xd0))); +} + +TEST_F(ReaderDeathTest, DW_EH_PE_omit) { + static const uint8_t data[] = { 42 }; + ByteReader reader(ENDIANNESS_BIG); + reader.SetAddressSize(4); + EXPECT_DEATH(reader.ReadEncodedPointer(data, dwarf2reader::DW_EH_PE_omit, + &pointer_size), + "encoding != DW_EH_PE_omit"); +} + +TEST_F(Reader, DW_EH_PE_absptr4) { + static const uint8_t data[] = { 0x27, 0x57, 0xea, 0x40 }; + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(4); + EXPECT_EQ(0x40ea5727U, + reader.ReadEncodedPointer(data, dwarf2reader::DW_EH_PE_absptr, + &pointer_size)); + EXPECT_EQ(4U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_absptr8) { + static const uint8_t data[] = { + 0x60, 0x27, 0x57, 0xea, 0x40, 0xc2, 0x98, 0x05, 0x01, 0x50 + }; + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(8); + EXPECT_EQ(0x010598c240ea5727ULL, + reader.ReadEncodedPointer(data + 1, dwarf2reader::DW_EH_PE_absptr, + &pointer_size)); + EXPECT_EQ(8U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_uleb128) { + static const uint8_t data[] = { 0x81, 0x84, 0x4c }; + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(4); + EXPECT_EQ(0x130201U, + reader.ReadEncodedPointer(data, dwarf2reader::DW_EH_PE_uleb128, + &pointer_size)); + EXPECT_EQ(3U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_udata2) { + static const uint8_t data[] = { 0xf4, 0x8d }; + ByteReader reader(ENDIANNESS_BIG); + reader.SetAddressSize(4); + EXPECT_EQ(0xf48dU, + reader.ReadEncodedPointer(data, dwarf2reader::DW_EH_PE_udata2, + &pointer_size)); + EXPECT_EQ(2U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_udata4) { + static const uint8_t data[] = { 0xb2, 0x68, 0xa5, 0x62, 0x8f, 0x8b }; + ByteReader reader(ENDIANNESS_BIG); + reader.SetAddressSize(8); + EXPECT_EQ(0xa5628f8b, + reader.ReadEncodedPointer(data + 2, dwarf2reader::DW_EH_PE_udata4, + &pointer_size)); + EXPECT_EQ(4U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_udata8Addr8) { + static const uint8_t data[] = { + 0x27, 0x04, 0x73, 0x04, 0x69, 0x9f, 0x19, 0xed, 0x8f, 0xfe + }; + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(8); + EXPECT_EQ(0x8fed199f69047304ULL, + reader.ReadEncodedPointer(data + 1, dwarf2reader::DW_EH_PE_udata8, + &pointer_size)); + EXPECT_EQ(8U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_udata8Addr4) { + static const uint8_t data[] = { + 0x27, 0x04, 0x73, 0x04, 0x69, 0x9f, 0x19, 0xed, 0x8f, 0xfe + }; + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(4); + EXPECT_EQ(0x69047304ULL, + reader.ReadEncodedPointer(data + 1, dwarf2reader::DW_EH_PE_udata8, + &pointer_size)); + EXPECT_EQ(8U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_sleb128) { + static const uint8_t data[] = { 0x42, 0xff, 0xfb, 0x73 }; + ByteReader reader(ENDIANNESS_BIG); + reader.SetAddressSize(4); + EXPECT_EQ(-0x030201U & 0xffffffff, + reader.ReadEncodedPointer(data + 1, dwarf2reader::DW_EH_PE_sleb128, + &pointer_size)); + EXPECT_EQ(3U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_sdata2) { + static const uint8_t data[] = { 0xb9, 0xbf }; + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(8); + EXPECT_EQ(0xffffffffffffbfb9ULL, + reader.ReadEncodedPointer(data, dwarf2reader::DW_EH_PE_sdata2, + &pointer_size)); + EXPECT_EQ(2U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_sdata4) { + static const uint8_t data[] = { 0xa0, 0xca, 0xf2, 0xb8, 0xc2, 0xad }; + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(8); + EXPECT_EQ(0xffffffffadc2b8f2ULL, + reader.ReadEncodedPointer(data + 2, dwarf2reader::DW_EH_PE_sdata4, + &pointer_size)); + EXPECT_EQ(4U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_sdata8) { + static const uint8_t data[] = { + 0xf6, 0x66, 0x57, 0x79, 0xe0, 0x0c, 0x9b, 0x26, 0x87 + }; + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(8); + EXPECT_EQ(0x87269b0ce0795766ULL, + reader.ReadEncodedPointer(data + 1, dwarf2reader::DW_EH_PE_sdata8, + &pointer_size)); + EXPECT_EQ(8U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_pcrel) { + static const uint8_t data[] = { + 0x4a, 0x8b, 0x1b, 0x14, 0xc8, 0xc4, 0x02, 0xce + }; + ByteReader reader(ENDIANNESS_BIG); + reader.SetAddressSize(4); + DwarfPointerEncoding encoding = + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_pcrel + | dwarf2reader::DW_EH_PE_absptr); + reader.SetCFIDataBase(0x89951377, data); + EXPECT_EQ(0x89951377 + 3 + 0x14c8c402, + reader.ReadEncodedPointer(data + 3, encoding, &pointer_size)); + EXPECT_EQ(4U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_textrel) { + static const uint8_t data[] = { + 0xd9, 0x0d, 0x05, 0x17, 0xc9, 0x7a, 0x42, 0x1e + }; + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(4); + reader.SetTextBase(0xb91beaf0); + DwarfPointerEncoding encoding = + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_textrel + | dwarf2reader::DW_EH_PE_sdata2); + EXPECT_EQ((0xb91beaf0 + 0xffffc917) & 0xffffffff, + reader.ReadEncodedPointer(data + 3, encoding, &pointer_size)); + EXPECT_EQ(2U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_datarel) { + static const uint8_t data[] = { + 0x16, 0xf2, 0xbb, 0x82, 0x68, 0xa7, 0xbc, 0x39 + }; + ByteReader reader(ENDIANNESS_BIG); + reader.SetAddressSize(8); + reader.SetDataBase(0xbef308bd25ce74f0ULL); + DwarfPointerEncoding encoding = + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_datarel + | dwarf2reader::DW_EH_PE_sleb128); + EXPECT_EQ(0xbef308bd25ce74f0ULL + 0xfffffffffffa013bULL, + reader.ReadEncodedPointer(data + 2, encoding, &pointer_size)); + EXPECT_EQ(3U, pointer_size); +} + +TEST_F(Reader, DW_EH_PE_funcrel) { + static const uint8_t data[] = { + 0x84, 0xf8, 0x14, 0x01, 0x61, 0xd1, 0x48, 0xc9 + }; + ByteReader reader(ENDIANNESS_BIG); + reader.SetAddressSize(4); + reader.SetFunctionBase(0x823c3520); + DwarfPointerEncoding encoding = + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_funcrel + | dwarf2reader::DW_EH_PE_udata2); + EXPECT_EQ(0x823c3520 + 0xd148, + reader.ReadEncodedPointer(data + 5, encoding, &pointer_size)); + EXPECT_EQ(2U, pointer_size); +} + +TEST(UsableBase, CFI) { + static const uint8_t data[] = { 0x42 }; + ByteReader reader(ENDIANNESS_BIG); + reader.SetCFIDataBase(0xb31cbd20, data); + EXPECT_TRUE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_absptr)); + EXPECT_TRUE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_pcrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_textrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_datarel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_funcrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_omit)); + EXPECT_FALSE(reader.UsableEncoding(DwarfPointerEncoding(0x60))); +} + +TEST(UsableBase, Text) { + ByteReader reader(ENDIANNESS_BIG); + reader.SetTextBase(0xa899ccb9); + EXPECT_TRUE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_absptr)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_pcrel)); + EXPECT_TRUE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_textrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_datarel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_funcrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_omit)); + EXPECT_FALSE(reader.UsableEncoding(DwarfPointerEncoding(0x60))); +} + +TEST(UsableBase, Data) { + ByteReader reader(ENDIANNESS_BIG); + reader.SetDataBase(0xf7b10bcd); + EXPECT_TRUE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_absptr)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_pcrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_textrel)); + EXPECT_TRUE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_datarel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_funcrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_omit)); + EXPECT_FALSE(reader.UsableEncoding(DwarfPointerEncoding(0x60))); +} + +TEST(UsableBase, Function) { + ByteReader reader(ENDIANNESS_BIG); + reader.SetFunctionBase(0xc2c0ed81); + EXPECT_TRUE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_absptr)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_pcrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_textrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_datarel)); + EXPECT_TRUE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_funcrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_omit)); + EXPECT_FALSE(reader.UsableEncoding(DwarfPointerEncoding(0x60))); +} + +TEST(UsableBase, ClearFunction) { + ByteReader reader(ENDIANNESS_BIG); + reader.SetFunctionBase(0xc2c0ed81); + reader.ClearFunctionBase(); + EXPECT_TRUE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_absptr)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_pcrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_textrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_datarel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_funcrel)); + EXPECT_FALSE(reader.UsableEncoding(dwarf2reader::DW_EH_PE_omit)); + EXPECT_FALSE(reader.UsableEncoding(DwarfPointerEncoding(0x60))); +} + +struct AlignedFixture { + AlignedFixture() : reader(ENDIANNESS_BIG) { reader.SetAddressSize(4); } + static const uint8_t data[10]; + ByteReader reader; + size_t pointer_size; +}; + +const uint8_t AlignedFixture::data[10] = { + 0xfe, 0x6e, 0x93, 0xd8, 0x34, 0xd5, 0x1c, 0xd3, 0xac, 0x2b +}; + +class Aligned: public AlignedFixture, public Test { }; + +TEST_F(Aligned, DW_EH_PE_aligned0) { + reader.SetCFIDataBase(0xb440305c, data); + EXPECT_EQ(0xfe6e93d8U, + reader.ReadEncodedPointer(data, dwarf2reader::DW_EH_PE_aligned, + &pointer_size)); + EXPECT_EQ(4U, pointer_size); +} + +TEST_F(Aligned, DW_EH_PE_aligned1) { + reader.SetCFIDataBase(0xb440305d, data); + EXPECT_EQ(0xd834d51cU, + reader.ReadEncodedPointer(data, dwarf2reader::DW_EH_PE_aligned, + &pointer_size)); + EXPECT_EQ(7U, pointer_size); +} + +TEST_F(Aligned, DW_EH_PE_aligned2) { + reader.SetCFIDataBase(0xb440305e, data); + EXPECT_EQ(0x93d834d5U, + reader.ReadEncodedPointer(data, dwarf2reader::DW_EH_PE_aligned, + &pointer_size)); + EXPECT_EQ(6U, pointer_size); +} + +TEST_F(Aligned, DW_EH_PE_aligned3) { + reader.SetCFIDataBase(0xb440305f, data); + EXPECT_EQ(0x6e93d834U, + reader.ReadEncodedPointer(data, dwarf2reader::DW_EH_PE_aligned, + &pointer_size)); + EXPECT_EQ(5U, pointer_size); +} + +TEST_F(Aligned, DW_EH_PE_aligned11) { + reader.SetCFIDataBase(0xb4403061, data); + EXPECT_EQ(0xd834d51cU, + reader.ReadEncodedPointer(data + 1, + dwarf2reader::DW_EH_PE_aligned, + &pointer_size)); + EXPECT_EQ(6U, pointer_size); +} + +TEST_F(Aligned, DW_EH_PE_aligned30) { + reader.SetCFIDataBase(0xb4403063, data); + EXPECT_EQ(0x6e93d834U, + reader.ReadEncodedPointer(data + 1, + dwarf2reader::DW_EH_PE_aligned, + &pointer_size)); + EXPECT_EQ(4U, pointer_size); +} + +TEST_F(Aligned, DW_EH_PE_aligned23) { + reader.SetCFIDataBase(0xb4403062, data); + EXPECT_EQ(0x1cd3ac2bU, + reader.ReadEncodedPointer(data + 3, + dwarf2reader::DW_EH_PE_aligned, + &pointer_size)); + EXPECT_EQ(7U, pointer_size); +} + +TEST_F(Aligned, DW_EH_PE_aligned03) { + reader.SetCFIDataBase(0xb4403064, data); + EXPECT_EQ(0x34d51cd3U, + reader.ReadEncodedPointer(data + 3, + dwarf2reader::DW_EH_PE_aligned, + &pointer_size)); + EXPECT_EQ(5U, pointer_size); +} diff --git a/3rdParty/Breakpad/src/common/dwarf/cfi_assembler.cc b/3rdParty/Breakpad/src/common/dwarf/cfi_assembler.cc new file mode 100644 index 0000000..2dc2208 --- /dev/null +++ b/3rdParty/Breakpad/src/common/dwarf/cfi_assembler.cc @@ -0,0 +1,204 @@ +// Copyright (c) 2010, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com> + +// cfi_assembler.cc: Implementation of google_breakpad::CFISection class. +// See cfi_assembler.h for details. + +#include "common/dwarf/cfi_assembler.h" + +#include <assert.h> +#include <stdlib.h> + +namespace google_breakpad { + +using dwarf2reader::DwarfPointerEncoding; + +CFISection &CFISection::CIEHeader(uint64_t code_alignment_factor, + int data_alignment_factor, + unsigned return_address_register, + uint8_t version, + const string &augmentation, + bool dwarf64, + uint8_t address_size, + uint8_t segment_size) { + assert(!entry_length_); + entry_length_ = new PendingLength(); + in_fde_ = false; + + if (dwarf64) { + D32(kDwarf64InitialLengthMarker); + D64(entry_length_->length); + entry_length_->start = Here(); + D64(eh_frame_ ? kEHFrame64CIEIdentifier : kDwarf64CIEIdentifier); + } else { + D32(entry_length_->length); + entry_length_->start = Here(); + D32(eh_frame_ ? kEHFrame32CIEIdentifier : kDwarf32CIEIdentifier); + } + D8(version); + AppendCString(augmentation); + if (version >= 4) { + D8(address_size); + D8(segment_size); + } + ULEB128(code_alignment_factor); + LEB128(data_alignment_factor); + if (version == 1) + D8(return_address_register); + else + ULEB128(return_address_register); + return *this; +} + +CFISection &CFISection::FDEHeader(Label cie_pointer, + uint64_t initial_location, + uint64_t address_range, + bool dwarf64) { + assert(!entry_length_); + entry_length_ = new PendingLength(); + in_fde_ = true; + fde_start_address_ = initial_location; + + if (dwarf64) { + D32(0xffffffff); + D64(entry_length_->length); + entry_length_->start = Here(); + if (eh_frame_) + D64(Here() - cie_pointer); + else + D64(cie_pointer); + } else { + D32(entry_length_->length); + entry_length_->start = Here(); + if (eh_frame_) + D32(Here() - cie_pointer); + else + D32(cie_pointer); + } + EncodedPointer(initial_location); + // The FDE length in an .eh_frame section uses the same encoding as the + // initial location, but ignores the base address (selected by the upper + // nybble of the encoding), as it's a length, not an address that can be + // made relative. + EncodedPointer(address_range, + DwarfPointerEncoding(pointer_encoding_ & 0x0f)); + return *this; +} + +CFISection &CFISection::FinishEntry() { + assert(entry_length_); + Align(address_size_, dwarf2reader::DW_CFA_nop); + entry_length_->length = Here() - entry_length_->start; + delete entry_length_; + entry_length_ = NULL; + in_fde_ = false; + return *this; +} + +CFISection &CFISection::EncodedPointer(uint64_t address, + DwarfPointerEncoding encoding, + const EncodedPointerBases &bases) { + // Omitted data is extremely easy to emit. + if (encoding == dwarf2reader::DW_EH_PE_omit) + return *this; + + // If (encoding & dwarf2reader::DW_EH_PE_indirect) != 0, then we assume + // that ADDRESS is the address at which the pointer is stored --- in + // other words, that bit has no effect on how we write the pointer. + encoding = DwarfPointerEncoding(encoding & ~dwarf2reader::DW_EH_PE_indirect); + + // Find the base address to which this pointer is relative. The upper + // nybble of the encoding specifies this. + uint64_t base; + switch (encoding & 0xf0) { + case dwarf2reader::DW_EH_PE_absptr: base = 0; break; + case dwarf2reader::DW_EH_PE_pcrel: base = bases.cfi + Size(); break; + case dwarf2reader::DW_EH_PE_textrel: base = bases.text; break; + case dwarf2reader::DW_EH_PE_datarel: base = bases.data; break; + case dwarf2reader::DW_EH_PE_funcrel: base = fde_start_address_; break; + case dwarf2reader::DW_EH_PE_aligned: base = 0; break; + default: abort(); + }; + + // Make ADDRESS relative. Yes, this is appropriate even for "absptr" + // values; see gcc/unwind-pe.h. + address -= base; + + // Align the pointer, if required. + if ((encoding & 0xf0) == dwarf2reader::DW_EH_PE_aligned) + Align(AddressSize()); + + // Append ADDRESS to this section in the appropriate form. For the + // fixed-width forms, we don't need to differentiate between signed and + // unsigned encodings, because ADDRESS has already been extended to 64 + // bits before it was passed to us. + switch (encoding & 0x0f) { + case dwarf2reader::DW_EH_PE_absptr: + Address(address); + break; + + case dwarf2reader::DW_EH_PE_uleb128: + ULEB128(address); + break; + + case dwarf2reader::DW_EH_PE_sleb128: + LEB128(address); + break; + + case dwarf2reader::DW_EH_PE_udata2: + case dwarf2reader::DW_EH_PE_sdata2: + D16(address); + break; + + case dwarf2reader::DW_EH_PE_udata4: + case dwarf2reader::DW_EH_PE_sdata4: + D32(address); + break; + + case dwarf2reader::DW_EH_PE_udata8: + case dwarf2reader::DW_EH_PE_sdata8: + D64(address); + break; + + default: + abort(); + } + + return *this; +}; + +const uint32_t CFISection::kDwarf64InitialLengthMarker; +const uint32_t CFISection::kDwarf32CIEIdentifier; +const uint64_t CFISection::kDwarf64CIEIdentifier; +const uint32_t CFISection::kEHFrame32CIEIdentifier; +const uint64_t CFISection::kEHFrame64CIEIdentifier; + +} // namespace google_breakpad diff --git a/3rdParty/Breakpad/src/common/dwarf/cfi_assembler.h b/3rdParty/Breakpad/src/common/dwarf/cfi_assembler.h new file mode 100644 index 0000000..bd7354d --- /dev/null +++ b/3rdParty/Breakpad/src/common/dwarf/cfi_assembler.h @@ -0,0 +1,271 @@ +// -*- mode: C++ -*- + +// Copyright (c) 2010, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com> + +// cfi_assembler.h: Define CFISection, a class for creating properly +// (and improperly) formatted DWARF CFI data for unit tests. + +#ifndef PROCESSOR_CFI_ASSEMBLER_H_ +#define PROCESSOR_CFI_ASSEMBLER_H_ + +#include <string> + +#include "common/dwarf/dwarf2enums.h" +#include "common/test_assembler.h" +#include "common/using_std_string.h" +#include "google_breakpad/common/breakpad_types.h" + +namespace google_breakpad { + +using dwarf2reader::DwarfPointerEncoding; +using google_breakpad::test_assembler::Endianness; +using google_breakpad::test_assembler::Label; +using google_breakpad::test_assembler::Section; + +class CFISection: public Section { + public: + + // CFI augmentation strings beginning with 'z', defined by the + // Linux/IA-64 C++ ABI, can specify interesting encodings for + // addresses appearing in FDE headers and call frame instructions (and + // for additional fields whose presence the augmentation string + // specifies). In particular, pointers can be specified to be relative + // to various base address: the start of the .text section, the + // location holding the address itself, and so on. These allow the + // frame data to be position-independent even when they live in + // write-protected pages. These variants are specified at the + // following two URLs: + // + // http://refspecs.linux-foundation.org/LSB_4.0.0/LSB-Core-generic/LSB-Core-generic/dwarfext.html + // http://refspecs.linux-foundation.org/LSB_4.0.0/LSB-Core-generic/LSB-Core-generic/ehframechpt.html + // + // CFISection leaves the production of well-formed 'z'-augmented CIEs and + // FDEs to the user, but does provide EncodedPointer, to emit + // properly-encoded addresses for a given pointer encoding. + // EncodedPointer uses an instance of this structure to find the base + // addresses it should use; you can establish a default for all encoded + // pointers appended to this section with SetEncodedPointerBases. + struct EncodedPointerBases { + EncodedPointerBases() : cfi(), text(), data() { } + + // The starting address of this CFI section in memory, for + // DW_EH_PE_pcrel. DW_EH_PE_pcrel pointers may only be used in data + // that has is loaded into the program's address space. + uint64_t cfi; + + // The starting address of this file's .text section, for DW_EH_PE_textrel. + uint64_t text; + + // The starting address of this file's .got or .eh_frame_hdr section, + // for DW_EH_PE_datarel. + uint64_t data; + }; + + // Create a CFISection whose endianness is ENDIANNESS, and where + // machine addresses are ADDRESS_SIZE bytes long. If EH_FRAME is + // true, use the .eh_frame format, as described by the Linux + // Standards Base Core Specification, instead of the DWARF CFI + // format. + CFISection(Endianness endianness, size_t address_size, + bool eh_frame = false) + : Section(endianness), address_size_(address_size), eh_frame_(eh_frame), + pointer_encoding_(dwarf2reader::DW_EH_PE_absptr), + encoded_pointer_bases_(), entry_length_(NULL), in_fde_(false) { + // The 'start', 'Here', and 'Mark' members of a CFISection all refer + // to section offsets. + start() = 0; + } + + // Return this CFISection's address size. + size_t AddressSize() const { return address_size_; } + + // Return true if this CFISection uses the .eh_frame format, or + // false if it contains ordinary DWARF CFI data. + bool ContainsEHFrame() const { return eh_frame_; } + + // Use ENCODING for pointers in calls to FDEHeader and EncodedPointer. + void SetPointerEncoding(DwarfPointerEncoding encoding) { + pointer_encoding_ = encoding; + } + + // Use the addresses in BASES as the base addresses for encoded + // pointers in subsequent calls to FDEHeader or EncodedPointer. + // This function makes a copy of BASES. + void SetEncodedPointerBases(const EncodedPointerBases &bases) { + encoded_pointer_bases_ = bases; + } + + // Append a Common Information Entry header to this section with the + // given values. If dwarf64 is true, use the 64-bit DWARF initial + // length format for the CIE's initial length. Return a reference to + // this section. You should call FinishEntry after writing the last + // instruction for the CIE. + // + // Before calling this function, you will typically want to use Mark + // or Here to make a label to pass to FDEHeader that refers to this + // CIE's position in the section. + CFISection &CIEHeader(uint64_t code_alignment_factor, + int data_alignment_factor, + unsigned return_address_register, + uint8_t version = 3, + const string &augmentation = "", + bool dwarf64 = false, + uint8_t address_size = 8, + uint8_t segment_size = 0); + + // Append a Frame Description Entry header to this section with the + // given values. If dwarf64 is true, use the 64-bit DWARF initial + // length format for the CIE's initial length. Return a reference to + // this section. You should call FinishEntry after writing the last + // instruction for the CIE. + // + // This function doesn't support entries that are longer than + // 0xffffff00 bytes. (The "initial length" is always a 32-bit + // value.) Nor does it support .debug_frame sections longer than + // 0xffffff00 bytes. + CFISection &FDEHeader(Label cie_pointer, + uint64_t initial_location, + uint64_t address_range, + bool dwarf64 = false); + + // Note the current position as the end of the last CIE or FDE we + // started, after padding with DW_CFA_nops for alignment. This + // defines the label representing the entry's length, cited in the + // entry's header. Return a reference to this section. + CFISection &FinishEntry(); + + // Append the contents of BLOCK as a DW_FORM_block value: an + // unsigned LEB128 length, followed by that many bytes of data. + CFISection &Block(const string &block) { + ULEB128(block.size()); + Append(block); + return *this; + } + + // Append ADDRESS to this section, in the appropriate size and + // endianness. Return a reference to this section. + CFISection &Address(uint64_t address) { + Section::Append(endianness(), address_size_, address); + return *this; + } + CFISection &Address(Label address) { + Section::Append(endianness(), address_size_, address); + return *this; + } + + // Append ADDRESS to this section, using ENCODING and BASES. ENCODING + // defaults to this section's default encoding, established by + // SetPointerEncoding. BASES defaults to this section's bases, set by + // SetEncodedPointerBases. If the DW_EH_PE_indirect bit is set in the + // encoding, assume that ADDRESS is where the true address is stored. + // Return a reference to this section. + // + // (C++ doesn't let me use default arguments here, because I want to + // refer to members of *this in the default argument expression.) + CFISection &EncodedPointer(uint64_t address) { + return EncodedPointer(address, pointer_encoding_, encoded_pointer_bases_); + } + CFISection &EncodedPointer(uint64_t address, DwarfPointerEncoding encoding) { + return EncodedPointer(address, encoding, encoded_pointer_bases_); + } + CFISection &EncodedPointer(uint64_t address, DwarfPointerEncoding encoding, + const EncodedPointerBases &bases); + + // Restate some member functions, to keep chaining working nicely. + CFISection &Mark(Label *label) { Section::Mark(label); return *this; } + CFISection &D8(uint8_t v) { Section::D8(v); return *this; } + CFISection &D16(uint16_t v) { Section::D16(v); return *this; } + CFISection &D16(Label v) { Section::D16(v); return *this; } + CFISection &D32(uint32_t v) { Section::D32(v); return *this; } + CFISection &D32(const Label &v) { Section::D32(v); return *this; } + CFISection &D64(uint64_t v) { Section::D64(v); return *this; } + CFISection &D64(const Label &v) { Section::D64(v); return *this; } + CFISection &LEB128(long long v) { Section::LEB128(v); return *this; } + CFISection &ULEB128(uint64_t v) { Section::ULEB128(v); return *this; } + + private: + // A length value that we've appended to the section, but is not yet + // known. LENGTH is the appended value; START is a label referring + // to the start of the data whose length was cited. + struct PendingLength { + Label length; + Label start; + }; + + // Constants used in CFI/.eh_frame data: + + // If the first four bytes of an "initial length" are this constant, then + // the data uses the 64-bit DWARF format, and the length itself is the + // subsequent eight bytes. + static const uint32_t kDwarf64InitialLengthMarker = 0xffffffffU; + + // The CIE identifier for 32- and 64-bit DWARF CFI and .eh_frame data. + static const uint32_t kDwarf32CIEIdentifier = ~(uint32_t)0; + static const uint64_t kDwarf64CIEIdentifier = ~(uint64_t)0; + static const uint32_t kEHFrame32CIEIdentifier = 0; + static const uint64_t kEHFrame64CIEIdentifier = 0; + + // The size of a machine address for the data in this section. + size_t address_size_; + + // If true, we are generating a Linux .eh_frame section, instead of + // a standard DWARF .debug_frame section. + bool eh_frame_; + + // The encoding to use for FDE pointers. + DwarfPointerEncoding pointer_encoding_; + + // The base addresses to use when emitting encoded pointers. + EncodedPointerBases encoded_pointer_bases_; + + // The length value for the current entry. + // + // Oddly, this must be dynamically allocated. Labels never get new + // values; they only acquire constraints on the value they already + // have, or assert if you assign them something incompatible. So + // each header needs truly fresh Label objects to cite in their + // headers and track their positions. The alternative is explicit + // destructor invocation and a placement new. Ick. + PendingLength *entry_length_; + + // True if we are currently emitting an FDE --- that is, we have + // called FDEHeader but have not yet called FinishEntry. + bool in_fde_; + + // If in_fde_ is true, this is its starting address. We use this for + // emitting DW_EH_PE_funcrel pointers. + uint64_t fde_start_address_; +}; + +} // namespace google_breakpad + +#endif // PROCESSOR_CFI_ASSEMBLER_H_ diff --git a/3rdParty/Breakpad/src/common/dwarf/dwarf2diehandler.cc b/3rdParty/Breakpad/src/common/dwarf/dwarf2diehandler.cc index c741d69..94542b5 100644 --- a/3rdParty/Breakpad/src/common/dwarf/dwarf2diehandler.cc +++ b/3rdParty/Breakpad/src/common/dwarf/dwarf2diehandler.cc @@ -32,6 +32,7 @@ // See dwarf2diehandler.h for details. #include <assert.h> +#include <stdint.h> #include <string> @@ -57,8 +58,7 @@ bool DIEDispatcher::StartCompilationUnit(uint64 offset, uint8 address_size, dwarf_version); } -bool DIEDispatcher::StartDIE(uint64 offset, enum DwarfTag tag, - const AttributeList& attrs) { +bool DIEDispatcher::StartDIE(uint64 offset, enum DwarfTag tag) { // The stack entry for the parent of this DIE, if there is one. HandlerStack *parent = die_handlers_.empty() ? NULL : &die_handlers_.top(); @@ -82,7 +82,7 @@ bool DIEDispatcher::StartDIE(uint64 offset, enum DwarfTag tag, if (parent) { if (parent->handler_) // Ask the parent to find a handler. - handler = parent->handler_->FindChildHandler(offset, tag, attrs); + handler = parent->handler_->FindChildHandler(offset, tag); else // No parent handler means we're not interested in any of our // children. @@ -92,7 +92,7 @@ bool DIEDispatcher::StartDIE(uint64 offset, enum DwarfTag tag, // decides whether to visit it, but the root DIE has no parent // handler, so we have a special method on the root DIE handler // itself to decide. - if (root_handler_->StartRootDIE(offset, tag, attrs)) + if (root_handler_->StartRootDIE(offset, tag)) handler = root_handler_; else handler = NULL; @@ -168,7 +168,7 @@ void DIEDispatcher::ProcessAttributeReference(uint64 offset, void DIEDispatcher::ProcessAttributeBuffer(uint64 offset, enum DwarfAttribute attr, enum DwarfForm form, - const char* data, + const uint8_t *data, uint64 len) { HandlerStack ¤t = die_handlers_.top(); // This had better be an attribute of the DIE we were meant to handle. diff --git a/3rdParty/Breakpad/src/common/dwarf/dwarf2diehandler.h b/3rdParty/Breakpad/src/common/dwarf/dwarf2diehandler.h index 12b8d3a..a1e589a 100644 --- a/3rdParty/Breakpad/src/common/dwarf/dwarf2diehandler.h +++ b/3rdParty/Breakpad/src/common/dwarf/dwarf2diehandler.h @@ -156,6 +156,8 @@ #ifndef COMMON_DWARF_DWARF2DIEHANDLER_H__ #define COMMON_DWARF_DWARF2DIEHANDLER_H__ +#include <stdint.h> + #include <stack> #include <string> @@ -206,7 +208,7 @@ class DIEHandler { uint64 data) { } virtual void ProcessAttributeBuffer(enum DwarfAttribute attr, enum DwarfForm form, - const char* data, + const uint8_t *data, uint64 len) { } virtual void ProcessAttributeString(enum DwarfAttribute attr, enum DwarfForm form, @@ -239,12 +241,10 @@ class DIEHandler { // that child DIE (and all its descendants). // // OFFSET is the offset of the child; TAG indicates what kind of DIE - // it is; and ATTRS is the list of attributes the DIE will have, and - // their forms (their values are not provided). + // it is. // // The default definition skips all children. - virtual DIEHandler *FindChildHandler(uint64 offset, enum DwarfTag tag, - const AttributeList &attrs) { + virtual DIEHandler *FindChildHandler(uint64 offset, enum DwarfTag tag) { return NULL; } @@ -280,8 +280,7 @@ class RootDIEHandler: public DIEHandler { // unit. // // The default definition elects to visit the root DIE. - virtual bool StartRootDIE(uint64 offset, enum DwarfTag tag, - const AttributeList& attrs) { return true; } + virtual bool StartRootDIE(uint64 offset, enum DwarfTag tag) { return true; } }; class DIEDispatcher: public Dwarf2Handler { @@ -296,8 +295,7 @@ class DIEDispatcher: public Dwarf2Handler { bool StartCompilationUnit(uint64 offset, uint8 address_size, uint8 offset_size, uint64 cu_length, uint8 dwarf_version); - bool StartDIE(uint64 offset, enum DwarfTag tag, - const AttributeList &attrs); + bool StartDIE(uint64 offset, enum DwarfTag tag); void ProcessAttributeUnsigned(uint64 offset, enum DwarfAttribute attr, enum DwarfForm form, @@ -313,7 +311,7 @@ class DIEDispatcher: public Dwarf2Handler { void ProcessAttributeBuffer(uint64 offset, enum DwarfAttribute attr, enum DwarfForm form, - const char* data, + const uint8_t *data, uint64 len); void ProcessAttributeString(uint64 offset, enum DwarfAttribute attr, diff --git a/3rdParty/Breakpad/src/common/dwarf/dwarf2diehandler_unittest.cc b/3rdParty/Breakpad/src/common/dwarf/dwarf2diehandler_unittest.cc new file mode 100644 index 0000000..db70eb3 --- /dev/null +++ b/3rdParty/Breakpad/src/common/dwarf/dwarf2diehandler_unittest.cc @@ -0,0 +1,527 @@ +// -*- mode: c++ -*- + +// Copyright (c) 2010 Google Inc. All Rights Reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com> + +// dwarf2diehander_unittest.cc: Unit tests for google_breakpad::DIEDispatcher. + +#include <stdint.h> + +#include <string> +#include <utility> + +#include "breakpad_googletest_includes.h" + +#include "common/dwarf/dwarf2diehandler.h" +#include "common/using_std_string.h" + +using std::make_pair; + +using ::testing::_; +using ::testing::ContainerEq; +using ::testing::ElementsAreArray; +using ::testing::Eq; +using ::testing::InSequence; +using ::testing::Return; +using ::testing::Sequence; +using ::testing::StrEq; + +using dwarf2reader::DIEDispatcher; +using dwarf2reader::DIEHandler; +using dwarf2reader::DwarfAttribute; +using dwarf2reader::DwarfForm; +using dwarf2reader::DwarfTag; +using dwarf2reader::RootDIEHandler; + +class MockDIEHandler: public DIEHandler { + public: + MOCK_METHOD3(ProcessAttributeUnsigned, + void(DwarfAttribute, DwarfForm, uint64)); + MOCK_METHOD3(ProcessAttributeSigned, + void(DwarfAttribute, DwarfForm, int64)); + MOCK_METHOD3(ProcessAttributeReference, + void(DwarfAttribute, DwarfForm, uint64)); + MOCK_METHOD4(ProcessAttributeBuffer, + void(DwarfAttribute, DwarfForm, const uint8_t *, uint64)); + MOCK_METHOD3(ProcessAttributeString, + void(DwarfAttribute, DwarfForm, const string &)); + MOCK_METHOD3(ProcessAttributeSignature, + void(DwarfAttribute, DwarfForm, uint64)); + MOCK_METHOD0(EndAttributes, bool()); + MOCK_METHOD2(FindChildHandler, DIEHandler *(uint64, DwarfTag)); + MOCK_METHOD0(Finish, void()); +}; + +class MockRootDIEHandler: public RootDIEHandler { + public: + MOCK_METHOD3(ProcessAttributeUnsigned, + void(DwarfAttribute, DwarfForm, uint64)); + MOCK_METHOD3(ProcessAttributeSigned, + void(DwarfAttribute, DwarfForm, int64)); + MOCK_METHOD3(ProcessAttributeReference, + void(DwarfAttribute, DwarfForm, uint64)); + MOCK_METHOD4(ProcessAttributeBuffer, + void(DwarfAttribute, DwarfForm, const uint8_t *, uint64)); + MOCK_METHOD3(ProcessAttributeString, + void(DwarfAttribute, DwarfForm, const string &)); + MOCK_METHOD3(ProcessAttributeSignature, + void(DwarfAttribute, DwarfForm, uint64)); + MOCK_METHOD0(EndAttributes, bool()); + MOCK_METHOD2(FindChildHandler, DIEHandler *(uint64, DwarfTag)); + MOCK_METHOD0(Finish, void()); + MOCK_METHOD5(StartCompilationUnit, bool(uint64, uint8, uint8, uint64, uint8)); + MOCK_METHOD2(StartRootDIE, bool(uint64, DwarfTag)); +}; + +// If the handler elects to skip the compilation unit, the dispatcher +// should tell the reader so. +TEST(Dwarf2DIEHandler, SkipCompilationUnit) { + Sequence s; + MockRootDIEHandler mock_root_handler; + DIEDispatcher die_dispatcher(&mock_root_handler); + + EXPECT_CALL(mock_root_handler, + StartCompilationUnit(0x8d42aed77cfccf3eLL, + 0x89, 0xdc, + 0x2ecb4dc778a80f21LL, + 0x66)) + .InSequence(s) + .WillOnce(Return(false)); + + EXPECT_FALSE(die_dispatcher.StartCompilationUnit(0x8d42aed77cfccf3eLL, + 0x89, 0xdc, + 0x2ecb4dc778a80f21LL, + 0x66)); +} + +// If the handler elects to skip the root DIE, the dispatcher should +// tell the reader so. +TEST(Dwarf2DIEHandler, SkipRootDIE) { + Sequence s; + MockRootDIEHandler mock_root_handler; + DIEDispatcher die_dispatcher(&mock_root_handler); + + EXPECT_CALL(mock_root_handler, + StartCompilationUnit(0xde8994029fc8b999LL, 0xf4, 0x02, + 0xb00febffa76e2b2bLL, 0x5c)) + .InSequence(s) + .WillOnce(Return(true)); + EXPECT_CALL(mock_root_handler, + StartRootDIE(0x7d08242b4b510cf2LL, (DwarfTag) 0xb4f98da6)) + .InSequence(s) + .WillOnce(Return(false)); + + EXPECT_TRUE(die_dispatcher.StartCompilationUnit(0xde8994029fc8b999LL, + 0xf4, 0x02, + 0xb00febffa76e2b2bLL, 0x5c)); + EXPECT_FALSE(die_dispatcher.StartDIE(0x7d08242b4b510cf2LL, + (DwarfTag) 0xb4f98da6)); + die_dispatcher.EndDIE(0x7d08242b4b510cf2LL); +} + +// If the handler elects to skip the root DIE's children, the +// dispatcher should tell the reader so --- and avoid deleting the +// root handler. +TEST(Dwarf2DIEHandler, SkipRootDIEChildren) { + MockRootDIEHandler mock_root_handler; + DIEDispatcher die_dispatcher(&mock_root_handler); + + { + InSequence s; + + EXPECT_CALL(mock_root_handler, + StartCompilationUnit(0x15d6897480cc65a7LL, 0x26, 0xa0, + 0x09f8bf0767f91675LL, 0xdb)) + .WillOnce(Return(true)); + EXPECT_CALL(mock_root_handler, + StartRootDIE(0x7d08242b4b510cf2LL, (DwarfTag) 0xb4f98da6)) + .WillOnce(Return(true)); + // Please don't tell me about my children. + EXPECT_CALL(mock_root_handler, EndAttributes()) + .WillOnce(Return(false)); + EXPECT_CALL(mock_root_handler, Finish()) + .WillOnce(Return()); + } + + EXPECT_TRUE(die_dispatcher.StartCompilationUnit(0x15d6897480cc65a7LL, + 0x26, 0xa0, + 0x09f8bf0767f91675LL, 0xdb)); + EXPECT_TRUE(die_dispatcher.StartDIE(0x7d08242b4b510cf2LL, + (DwarfTag) 0xb4f98da6)); + EXPECT_FALSE(die_dispatcher.StartDIE(0x435150ceedccda18LL, + (DwarfTag) 0xc3a17bba)); + die_dispatcher.EndDIE(0x435150ceedccda18LL); + die_dispatcher.EndDIE(0x7d08242b4b510cf2LL); +} + +// The dispatcher should pass attribute values through to the die +// handler accurately. +TEST(Dwarf2DIEHandler, PassAttributeValues) { + MockRootDIEHandler mock_root_handler; + DIEDispatcher die_dispatcher(&mock_root_handler); + + const uint8_t buffer[10] = { + 0x24, 0x24, 0x35, 0x9a, 0xca, 0xcf, 0xa8, 0x84, 0xa7, 0x18 + }; + string str = "\xc8\x26\x2e\x0d\xa4\x9c\x37\xd6\xfb\x1d"; + + // Set expectations. + { + InSequence s; + + // We'll like the compilation unit header. + EXPECT_CALL(mock_root_handler, + StartCompilationUnit(0x8d42aed77cfccf3eLL, 0x89, 0xdc, + 0x2ecb4dc778a80f21LL, 0x66)) + .WillOnce(Return(true)); + + // We'll like the root DIE. + EXPECT_CALL(mock_root_handler, + StartRootDIE(0xe2222da01e29f2a9LL, (DwarfTag) 0x9829445c)) + .WillOnce(Return(true)); + + // Expect some attribute values. + EXPECT_CALL(mock_root_handler, + ProcessAttributeUnsigned((DwarfAttribute) 0x1cc0bfed, + (DwarfForm) 0x424f1468, + 0xa592571997facda1ULL)) + .WillOnce(Return()); + EXPECT_CALL(mock_root_handler, + ProcessAttributeSigned((DwarfAttribute) 0x43694dc9, + (DwarfForm) 0xf6f78901L, + 0x92602a4e3bf1f446LL)) + .WillOnce(Return()); + EXPECT_CALL(mock_root_handler, + ProcessAttributeReference((DwarfAttribute) 0x4033e8cL, + (DwarfForm) 0xf66fbe0bL, + 0x50fddef44734fdecULL)) + .WillOnce(Return()); + EXPECT_CALL(mock_root_handler, + ProcessAttributeBuffer((DwarfAttribute) 0x25d7e0af, + (DwarfForm) 0xe99a539a, + buffer, sizeof(buffer))) + .WillOnce(Return()); + EXPECT_CALL(mock_root_handler, + ProcessAttributeString((DwarfAttribute) 0x310ed065, + (DwarfForm) 0x15762fec, + StrEq(str))) + .WillOnce(Return()); + EXPECT_CALL(mock_root_handler, + ProcessAttributeSignature((DwarfAttribute) 0x58790d72, + (DwarfForm) 0x4159f138, + 0x94682463613e6a5fULL)) + .WillOnce(Return()); + EXPECT_CALL(mock_root_handler, EndAttributes()) + .WillOnce(Return(true)); + EXPECT_CALL(mock_root_handler, FindChildHandler(_, _)) + .Times(0); + EXPECT_CALL(mock_root_handler, Finish()) + .WillOnce(Return()); + } + + // Drive the dispatcher. + + // Report the CU header. + EXPECT_TRUE(die_dispatcher.StartCompilationUnit(0x8d42aed77cfccf3eLL, + 0x89, 0xdc, + 0x2ecb4dc778a80f21LL, + 0x66)); + // Report the root DIE. + EXPECT_TRUE(die_dispatcher.StartDIE(0xe2222da01e29f2a9LL, + (DwarfTag) 0x9829445c)); + + // Report some attribute values. + die_dispatcher.ProcessAttributeUnsigned(0xe2222da01e29f2a9LL, + (DwarfAttribute) 0x1cc0bfed, + (DwarfForm) 0x424f1468, + 0xa592571997facda1ULL); + die_dispatcher.ProcessAttributeSigned(0xe2222da01e29f2a9LL, + (DwarfAttribute) 0x43694dc9, + (DwarfForm) 0xf6f78901, + 0x92602a4e3bf1f446LL); + die_dispatcher.ProcessAttributeReference(0xe2222da01e29f2a9LL, + (DwarfAttribute) 0x4033e8c, + (DwarfForm) 0xf66fbe0b, + 0x50fddef44734fdecULL); + die_dispatcher.ProcessAttributeBuffer(0xe2222da01e29f2a9LL, + (DwarfAttribute) 0x25d7e0af, + (DwarfForm) 0xe99a539a, + buffer, sizeof(buffer)); + die_dispatcher.ProcessAttributeString(0xe2222da01e29f2a9LL, + (DwarfAttribute) 0x310ed065, + (DwarfForm) 0x15762fec, + str); + die_dispatcher.ProcessAttributeSignature(0xe2222da01e29f2a9LL, + (DwarfAttribute) 0x58790d72, + (DwarfForm) 0x4159f138, + 0x94682463613e6a5fULL); + + // Finish the root DIE (and thus the CU). + die_dispatcher.EndDIE(0xe2222da01e29f2a9LL); +} + +TEST(Dwarf2DIEHandler, FindAndSkipChildren) { + MockRootDIEHandler mock_root_handler; + MockDIEHandler *mock_child1_handler = new(MockDIEHandler); + MockDIEHandler *mock_child3_handler = new(MockDIEHandler); + DIEDispatcher die_dispatcher(&mock_root_handler); + + { + InSequence s; + + // We'll like the compilation unit header. + EXPECT_CALL(mock_root_handler, + StartCompilationUnit(0x9ec1e6d05e434a0eLL, 0xeb, 0x21, + 0x47dd3c764275a216LL, 0xa5)) + .WillOnce(Return(true)); + + // Root DIE. + { + EXPECT_CALL(mock_root_handler, + StartRootDIE(0x15f0e06bdfe3c372LL, (DwarfTag) 0xf5d60c59)) + .WillOnce(Return(true)); + EXPECT_CALL(mock_root_handler, + ProcessAttributeSigned((DwarfAttribute) 0xf779a642, + (DwarfForm) 0x2cb63027, + 0x18e744661769d08fLL)) + .WillOnce(Return()); + EXPECT_CALL(mock_root_handler, EndAttributes()) + .WillOnce(Return(true)); + + // First child DIE. + EXPECT_CALL(mock_root_handler, + FindChildHandler(0x149f644f8116fe8cLL, + (DwarfTag) 0xac2cbd8c)) + .WillOnce(Return(mock_child1_handler)); + { + EXPECT_CALL(*mock_child1_handler, + ProcessAttributeSigned((DwarfAttribute) 0xa6fd6f65, + (DwarfForm) 0xe4f64c41, + 0x1b04e5444a55fe67LL)) + .WillOnce(Return()); + EXPECT_CALL(*mock_child1_handler, EndAttributes()) + .WillOnce(Return(false)); + // Skip first grandchild DIE and first great-grandchild DIE. + EXPECT_CALL(*mock_child1_handler, Finish()) + .WillOnce(Return()); + } + + // Second child DIE. Root handler will decline to return a handler + // for this child. + EXPECT_CALL(mock_root_handler, + FindChildHandler(0x97412be24875de9dLL, + (DwarfTag) 0x505a068b)) + .WillOnce(Return((DIEHandler *) NULL)); + + // Third child DIE. + EXPECT_CALL(mock_root_handler, + FindChildHandler(0x753c964c8ab538aeLL, + (DwarfTag) 0x8c22970e)) + .WillOnce(Return(mock_child3_handler)); + { + EXPECT_CALL(*mock_child3_handler, + ProcessAttributeSigned((DwarfAttribute) 0x4e2b7cfb, + (DwarfForm) 0x610b7ae1, + 0x3ea5c609d7d7560fLL)) + .WillOnce(Return()); + EXPECT_CALL(*mock_child3_handler, EndAttributes()) + .WillOnce(Return(true)); + EXPECT_CALL(*mock_child3_handler, Finish()) + .WillOnce(Return()); + } + + EXPECT_CALL(mock_root_handler, Finish()) + .WillOnce(Return()); + } + } + + + // Drive the dispatcher. + + // Report the CU header. + EXPECT_TRUE(die_dispatcher + .StartCompilationUnit(0x9ec1e6d05e434a0eLL, 0xeb, 0x21, + 0x47dd3c764275a216LL, 0xa5)); + // Report the root DIE. + { + EXPECT_TRUE(die_dispatcher.StartDIE(0x15f0e06bdfe3c372LL, + (DwarfTag) 0xf5d60c59)); + die_dispatcher.ProcessAttributeSigned(0x15f0e06bdfe3c372LL, + (DwarfAttribute) 0xf779a642, + (DwarfForm) 0x2cb63027, + 0x18e744661769d08fLL); + + // First child DIE. + { + EXPECT_TRUE(die_dispatcher.StartDIE(0x149f644f8116fe8cLL, + (DwarfTag) 0xac2cbd8c)); + die_dispatcher.ProcessAttributeSigned(0x149f644f8116fe8cLL, + (DwarfAttribute) 0xa6fd6f65, + (DwarfForm) 0xe4f64c41, + 0x1b04e5444a55fe67LL); + + // First grandchild DIE. Will be skipped. + { + EXPECT_FALSE(die_dispatcher.StartDIE(0xd68de1ee0bd29419LL, + (DwarfTag) 0x22f05a15)); + // First great-grandchild DIE. Will be skipped without being + // mentioned to any handler. + { + EXPECT_FALSE(die_dispatcher + .StartDIE(0xb3076285d25cac25LL, + (DwarfTag) 0xcff4061b)); + die_dispatcher.EndDIE(0xb3076285d25cac25LL); + } + die_dispatcher.EndDIE(0xd68de1ee0bd29419LL); + } + die_dispatcher.EndDIE(0x149f644f8116fe8cLL); + } + + // Second child DIE. Root handler will decline to find a handler for it. + { + EXPECT_FALSE(die_dispatcher.StartDIE(0x97412be24875de9dLL, + (DwarfTag) 0x505a068b)); + die_dispatcher.EndDIE(0x97412be24875de9dLL); + } + + // Third child DIE. + { + EXPECT_TRUE(die_dispatcher.StartDIE(0x753c964c8ab538aeLL, + (DwarfTag) 0x8c22970e)); + die_dispatcher.ProcessAttributeSigned(0x753c964c8ab538aeLL, + (DwarfAttribute) 0x4e2b7cfb, + (DwarfForm) 0x610b7ae1, + 0x3ea5c609d7d7560fLL); + die_dispatcher.EndDIE(0x753c964c8ab538aeLL); + } + + // Finish the root DIE (and thus the CU). + die_dispatcher.EndDIE(0x15f0e06bdfe3c372LL); + } +} + +// The DIEDispatcher destructor is supposed to delete all handlers on +// the stack, except for the root. +TEST(Dwarf2DIEHandler, FreeHandlersOnStack) { + MockRootDIEHandler mock_root_handler; + MockDIEHandler *mock_child_handler = new(MockDIEHandler); + MockDIEHandler *mock_grandchild_handler = new(MockDIEHandler); + + { + InSequence s; + + // We'll like the compilation unit header. + EXPECT_CALL(mock_root_handler, + StartCompilationUnit(0x87b41ba8381cd71cLL, 0xff, 0x89, + 0x76d392ff393ddda2LL, 0xbf)) + .WillOnce(Return(true)); + + // Root DIE. + { + EXPECT_CALL(mock_root_handler, + StartRootDIE(0xbf13b761691ddc91LL, (DwarfTag) 0x98980361)) + .WillOnce(Return(true)); + EXPECT_CALL(mock_root_handler, EndAttributes()) + .WillOnce(Return(true)); + + // Child DIE. + EXPECT_CALL(mock_root_handler, + FindChildHandler(0x058f09240c5fc8c9LL, + (DwarfTag) 0x898bf0d0)) + .WillOnce(Return(mock_child_handler)); + { + EXPECT_CALL(*mock_child_handler, EndAttributes()) + .WillOnce(Return(true)); + + // Grandchild DIE. + EXPECT_CALL(*mock_child_handler, + FindChildHandler(0x32dc00c9945dc0c8LL, + (DwarfTag) 0x2802d007)) + .WillOnce(Return(mock_grandchild_handler)); + { + EXPECT_CALL(*mock_grandchild_handler, + ProcessAttributeSigned((DwarfAttribute) 0x4e2b7cfb, + (DwarfForm) 0x610b7ae1, + 0x3ea5c609d7d7560fLL)) + .WillOnce(Return()); + + // At this point, we abandon the traversal, so none of the + // usual stuff should get called. + EXPECT_CALL(*mock_grandchild_handler, EndAttributes()) + .Times(0); + EXPECT_CALL(*mock_grandchild_handler, Finish()) + .Times(0); + } + + EXPECT_CALL(*mock_child_handler, Finish()) + .Times(0); + } + + EXPECT_CALL(mock_root_handler, Finish()) + .Times(0); + } + } + + // The dispatcher. + DIEDispatcher die_dispatcher(&mock_root_handler); + + // Report the CU header. + EXPECT_TRUE(die_dispatcher + .StartCompilationUnit(0x87b41ba8381cd71cLL, 0xff, 0x89, + 0x76d392ff393ddda2LL, 0xbf)); + // Report the root DIE. + { + EXPECT_TRUE(die_dispatcher.StartDIE(0xbf13b761691ddc91LL, + (DwarfTag) 0x98980361)); + + // Child DIE. + { + EXPECT_TRUE(die_dispatcher.StartDIE(0x058f09240c5fc8c9LL, + (DwarfTag) 0x898bf0d0)); + + // Grandchild DIE. + { + EXPECT_TRUE(die_dispatcher.StartDIE(0x32dc00c9945dc0c8LL, + (DwarfTag) 0x2802d007)); + die_dispatcher.ProcessAttributeSigned(0x32dc00c9945dc0c8LL, + (DwarfAttribute) 0x4e2b7cfb, + (DwarfForm) 0x610b7ae1, + 0x3ea5c609d7d7560fLL); + + // Stop the traversal abruptly, so that there will still be + // handlers on the stack when the dispatcher is destructed. + + // No EndDIE call... + } + // No EndDIE call... + } + // No EndDIE call... + } +} diff --git a/3rdParty/Breakpad/src/common/dwarf/dwarf2enums.h b/3rdParty/Breakpad/src/common/dwarf/dwarf2enums.h index 5565d66..4316a89 100644 --- a/3rdParty/Breakpad/src/common/dwarf/dwarf2enums.h +++ b/3rdParty/Breakpad/src/common/dwarf/dwarf2enums.h @@ -149,7 +149,10 @@ enum DwarfForm { DW_FORM_sec_offset = 0x17, DW_FORM_exprloc = 0x18, DW_FORM_flag_present = 0x19, - DW_FORM_ref_sig8 = 0x20 + DW_FORM_ref_sig8 = 0x20, + // Extensions for Fission. See http://gcc.gnu.org/wiki/DebugFission. + DW_FORM_GNU_addr_index = 0x1f01, + DW_FORM_GNU_str_index = 0x1f02 }; // Attribute names and codes @@ -229,6 +232,8 @@ enum DwarfAttribute { DW_AT_call_column = 0x57, DW_AT_call_file = 0x58, DW_AT_call_line = 0x59, + // DWARF 4 + DW_AT_linkage_name = 0x6e, // SGI/MIPS extensions. DW_AT_MIPS_fde = 0x2001, DW_AT_MIPS_loop_begin = 0x2002, @@ -264,6 +269,13 @@ enum DwarfAttribute { DW_AT_body_begin = 0x2105, DW_AT_body_end = 0x2106, DW_AT_GNU_vector = 0x2107, + // Extensions for Fission. See http://gcc.gnu.org/wiki/DebugFission. + DW_AT_GNU_dwo_name = 0x2130, + DW_AT_GNU_dwo_id = 0x2131, + DW_AT_GNU_ranges_base = 0x2132, + DW_AT_GNU_addr_base = 0x2133, + DW_AT_GNU_pubnames = 0x2134, + DW_AT_GNU_pubtypes = 0x2135, // VMS extensions. DW_AT_VMS_rtnbeg_pd_address = 0x2201, // UPC extension. @@ -489,9 +501,24 @@ enum DwarfOpcode { DW_OP_call_frame_cfa =0x9c, DW_OP_bit_piece =0x9d, DW_OP_lo_user =0xe0, - DW_OP_hi_user =0xff, + DW_OP_hi_user =0xff, // GNU extensions - DW_OP_GNU_push_tls_address =0xe0 + DW_OP_GNU_push_tls_address =0xe0, + // Extensions for Fission. See http://gcc.gnu.org/wiki/DebugFission. + DW_OP_GNU_addr_index =0xfb, + DW_OP_GNU_const_index =0xfc +}; + +// Section identifiers for DWP files +enum DwarfSectionId { + DW_SECT_INFO = 1, + DW_SECT_TYPES = 2, + DW_SECT_ABBREV = 3, + DW_SECT_LINE = 4, + DW_SECT_LOC = 5, + DW_SECT_STR_OFFSETS = 6, + DW_SECT_MACINFO = 7, + DW_SECT_MACRO = 8 }; // Source languages. These are values for DW_AT_language. @@ -517,6 +544,8 @@ enum DwarfLanguage DW_LANG_ObjC_plus_plus =0x0011, DW_LANG_UPC =0x0012, DW_LANG_D =0x0013, + DW_LANG_Rust =0x001c, + DW_LANG_Swift =0x001e, // Implementation-defined language code range. DW_LANG_lo_user = 0x8000, DW_LANG_hi_user = 0xffff, @@ -643,7 +672,7 @@ enum DwarfPointerEncoding // encoding (except DW_EH_PE_aligned), and indicates that the // encoded value represents the address at which the true address // is stored, not the true address itself. - DW_EH_PE_indirect = 0x80 + DW_EH_PE_indirect = 0x80 }; } // namespace dwarf2reader diff --git a/3rdParty/Breakpad/src/common/dwarf/dwarf2reader.cc b/3rdParty/Breakpad/src/common/dwarf/dwarf2reader.cc index 7c1a29d..8774122 100644 --- a/3rdParty/Breakpad/src/common/dwarf/dwarf2reader.cc +++ b/3rdParty/Breakpad/src/common/dwarf/dwarf2reader.cc @@ -44,6 +44,8 @@ #include <string> #include <utility> +#include <sys/stat.h> + #include "common/dwarf/bytereader-inl.h" #include "common/dwarf/bytereader.h" #include "common/dwarf/line_state_machine.h" @@ -51,11 +53,38 @@ namespace dwarf2reader { -CompilationUnit::CompilationUnit(const SectionMap& sections, uint64 offset, +CompilationUnit::CompilationUnit(const string& path, + const SectionMap& sections, uint64 offset, ByteReader* reader, Dwarf2Handler* handler) - : offset_from_section_start_(offset), reader_(reader), - sections_(sections), handler_(handler), abbrevs_(NULL), - string_buffer_(NULL), string_buffer_length_(0) {} + : path_(path), offset_from_section_start_(offset), reader_(reader), + sections_(sections), handler_(handler), abbrevs_(), + string_buffer_(NULL), string_buffer_length_(0), + str_offsets_buffer_(NULL), str_offsets_buffer_length_(0), + addr_buffer_(NULL), addr_buffer_length_(0), + is_split_dwarf_(false), dwo_id_(0), dwo_name_(), + skeleton_dwo_id_(0), ranges_base_(0), addr_base_(0), + have_checked_for_dwp_(false), dwp_path_(), + dwp_byte_reader_(), dwp_reader_() {} + +// Initialize a compilation unit from a .dwo or .dwp file. +// In this case, we need the .debug_addr section from the +// executable file that contains the corresponding skeleton +// compilation unit. We also inherit the Dwarf2Handler from +// the executable file, and call it as if we were still +// processing the original compilation unit. + +void CompilationUnit::SetSplitDwarf(const uint8_t* addr_buffer, + uint64 addr_buffer_length, + uint64 addr_base, + uint64 ranges_base, + uint64 dwo_id) { + is_split_dwarf_ = true; + addr_buffer_ = addr_buffer; + addr_buffer_length_ = addr_buffer_length; + addr_base_ = addr_base; + ranges_base_ = ranges_base; + skeleton_dwo_id_ = dwo_id; +} // Read a DWARF2/3 abbreviation section. // Each abbrev consists of a abbreviation number, a tag, a byte @@ -83,9 +112,9 @@ void CompilationUnit::ReadAbbrevs() { // The only way to check whether we are reading over the end of the // buffer would be to first compute the size of the leb128 data by // reading it, then go back and read it again. - const char* abbrev_start = iter->second.first + + const uint8_t *abbrev_start = iter->second.first + header_.abbrev_offset; - const char* abbrevptr = abbrev_start; + const uint8_t *abbrevptr = abbrev_start; #ifndef NDEBUG const uint64 abbrev_length = iter->second.second - header_.abbrev_offset; #endif @@ -132,8 +161,8 @@ void CompilationUnit::ReadAbbrevs() { } // Skips a single DIE's attributes. -const char* CompilationUnit::SkipDIE(const char* start, - const Abbrev& abbrev) { +const uint8_t *CompilationUnit::SkipDIE(const uint8_t* start, + const Abbrev& abbrev) { for (AttributeList::const_iterator i = abbrev.attributes.begin(); i != abbrev.attributes.end(); i++) { @@ -143,8 +172,8 @@ const char* CompilationUnit::SkipDIE(const char* start, } // Skips a single attribute form's data. -const char* CompilationUnit::SkipAttribute(const char* start, - enum DwarfForm form) { +const uint8_t *CompilationUnit::SkipAttribute(const uint8_t *start, + enum DwarfForm form) { size_t len; switch (form) { @@ -171,9 +200,11 @@ const char* CompilationUnit::SkipAttribute(const char* start, case DW_FORM_ref_sig8: return start + 8; case DW_FORM_string: - return start + strlen(start) + 1; + return start + strlen(reinterpret_cast<const char *>(start)) + 1; case DW_FORM_udata: case DW_FORM_ref_udata: + case DW_FORM_GNU_str_index: + case DW_FORM_GNU_addr_index: reader_->ReadUnsignedLEB128(start, &len); return start + len; @@ -183,14 +214,15 @@ const char* CompilationUnit::SkipAttribute(const char* start, case DW_FORM_addr: return start + reader_->AddressSize(); case DW_FORM_ref_addr: - // DWARF2 and 3 differ on whether ref_addr is address size or + // DWARF2 and 3/4 differ on whether ref_addr is address size or // offset size. - assert(header_.version == 2 || header_.version == 3); + assert(header_.version >= 2); if (header_.version == 2) { return start + reader_->AddressSize(); - } else if (header_.version == 3) { + } else if (header_.version >= 3) { return start + reader_->OffsetSize(); } + break; case DW_FORM_block1: return start + 1 + reader_->ReadOneByte(start); @@ -217,7 +249,7 @@ const char* CompilationUnit::SkipAttribute(const char* start, // the offset in the .debug_abbrev section for our abbrevs, and an // address size. void CompilationUnit::ReadHeader() { - const char* headerptr = buffer_; + const uint8_t *headerptr = buffer_; size_t initial_length_size; assert(headerptr + 4 < buffer_ + buffer_length_); @@ -234,7 +266,9 @@ void CompilationUnit::ReadHeader() { header_.abbrev_offset = reader_->ReadOffset(headerptr); headerptr += reader_->OffsetSize(); - assert(headerptr + 1 < buffer_ + buffer_length_); + // Compare against less than or equal because this may be the last + // section in the file. + assert(headerptr + 1 <= buffer_ + buffer_length_); header_.address_size = reader_->ReadOneByte(headerptr); reader_->SetAddressSize(header_.address_size); headerptr += 1; @@ -295,17 +329,39 @@ uint64 CompilationUnit::Start() { string_buffer_length_ = iter->second.second; } + // Set the string offsets section if we have one. + iter = sections_.find(".debug_str_offsets"); + if (iter != sections_.end()) { + str_offsets_buffer_ = iter->second.first; + str_offsets_buffer_length_ = iter->second.second; + } + + // Set the address section if we have one. + iter = sections_.find(".debug_addr"); + if (iter != sections_.end()) { + addr_buffer_ = iter->second.first; + addr_buffer_length_ = iter->second.second; + } + // Now that we have our abbreviations, start processing DIE's. ProcessDIEs(); + // If this is a skeleton compilation unit generated with split DWARF, + // and the client needs the full debug info, we need to find the full + // compilation unit in a .dwo or .dwp file. + if (!is_split_dwarf_ + && dwo_name_ != NULL + && handler_->NeedSplitDebugInfo()) + ProcessSplitDwarf(); + return ourlength; } // If one really wanted, you could merge SkipAttribute and // ProcessAttribute // This is all boring data manipulation and calling of the handler. -const char* CompilationUnit::ProcessAttribute( - uint64 dieoffset, const char* start, enum DwarfAttribute attr, +const uint8_t *CompilationUnit::ProcessAttribute( + uint64 dieoffset, const uint8_t *start, enum DwarfAttribute attr, enum DwarfForm form) { size_t len; @@ -319,48 +375,46 @@ const char* CompilationUnit::ProcessAttribute( return ProcessAttribute(dieoffset, start, attr, form); case DW_FORM_flag_present: - handler_->ProcessAttributeUnsigned(dieoffset, attr, form, 1); + ProcessAttributeUnsigned(dieoffset, attr, form, 1); return start; case DW_FORM_data1: case DW_FORM_flag: - handler_->ProcessAttributeUnsigned(dieoffset, attr, form, - reader_->ReadOneByte(start)); + ProcessAttributeUnsigned(dieoffset, attr, form, + reader_->ReadOneByte(start)); return start + 1; case DW_FORM_data2: - handler_->ProcessAttributeUnsigned(dieoffset, attr, form, - reader_->ReadTwoBytes(start)); + ProcessAttributeUnsigned(dieoffset, attr, form, + reader_->ReadTwoBytes(start)); return start + 2; case DW_FORM_data4: - handler_->ProcessAttributeUnsigned(dieoffset, attr, form, - reader_->ReadFourBytes(start)); + ProcessAttributeUnsigned(dieoffset, attr, form, + reader_->ReadFourBytes(start)); return start + 4; case DW_FORM_data8: - handler_->ProcessAttributeUnsigned(dieoffset, attr, form, - reader_->ReadEightBytes(start)); + ProcessAttributeUnsigned(dieoffset, attr, form, + reader_->ReadEightBytes(start)); return start + 8; case DW_FORM_string: { - const char* str = start; - handler_->ProcessAttributeString(dieoffset, attr, form, - str); + const char *str = reinterpret_cast<const char *>(start); + ProcessAttributeString(dieoffset, attr, form, str); return start + strlen(str) + 1; } case DW_FORM_udata: - handler_->ProcessAttributeUnsigned(dieoffset, attr, form, - reader_->ReadUnsignedLEB128(start, - &len)); + ProcessAttributeUnsigned(dieoffset, attr, form, + reader_->ReadUnsignedLEB128(start, &len)); return start + len; case DW_FORM_sdata: - handler_->ProcessAttributeSigned(dieoffset, attr, form, - reader_->ReadSignedLEB128(start, &len)); + ProcessAttributeSigned(dieoffset, attr, form, + reader_->ReadSignedLEB128(start, &len)); return start + len; case DW_FORM_addr: - handler_->ProcessAttributeUnsigned(dieoffset, attr, form, - reader_->ReadAddress(start)); + ProcessAttributeUnsigned(dieoffset, attr, form, + reader_->ReadAddress(start)); return start + reader_->AddressSize(); case DW_FORM_sec_offset: - handler_->ProcessAttributeUnsigned(dieoffset, attr, form, - reader_->ReadOffset(start)); + ProcessAttributeUnsigned(dieoffset, attr, form, + reader_->ReadOffset(start)); return start + reader_->OffsetSize(); case DW_FORM_ref1: @@ -390,14 +444,14 @@ const char* CompilationUnit::ProcessAttribute( + offset_from_section_start_); return start + len; case DW_FORM_ref_addr: - // DWARF2 and 3 differ on whether ref_addr is address size or + // DWARF2 and 3/4 differ on whether ref_addr is address size or // offset size. - assert(header_.version == 2 || header_.version == 3); + assert(header_.version >= 2); if (header_.version == 2) { handler_->ProcessAttributeReference(dieoffset, attr, form, reader_->ReadAddress(start)); return start + reader_->AddressSize(); - } else if (header_.version == 3) { + } else if (header_.version >= 3) { handler_->ProcessAttributeReference(dieoffset, attr, form, reader_->ReadOffset(start)); return start + reader_->OffsetSize(); @@ -439,34 +493,66 @@ const char* CompilationUnit::ProcessAttribute( const uint64 offset = reader_->ReadOffset(start); assert(string_buffer_ + offset < string_buffer_ + string_buffer_length_); - const char* str = string_buffer_ + offset; - handler_->ProcessAttributeString(dieoffset, attr, form, - str); + const char *str = reinterpret_cast<const char *>(string_buffer_ + offset); + ProcessAttributeString(dieoffset, attr, form, str); return start + reader_->OffsetSize(); } + + case DW_FORM_GNU_str_index: { + uint64 str_index = reader_->ReadUnsignedLEB128(start, &len); + const uint8_t* offset_ptr = + str_offsets_buffer_ + str_index * reader_->OffsetSize(); + const uint64 offset = reader_->ReadOffset(offset_ptr); + if (offset >= string_buffer_length_) { + return NULL; + } + + const char* str = reinterpret_cast<const char *>(string_buffer_) + offset; + ProcessAttributeString(dieoffset, attr, form, str); + return start + len; + break; + } + case DW_FORM_GNU_addr_index: { + uint64 addr_index = reader_->ReadUnsignedLEB128(start, &len); + const uint8_t* addr_ptr = + addr_buffer_ + addr_base_ + addr_index * reader_->AddressSize(); + ProcessAttributeUnsigned(dieoffset, attr, form, + reader_->ReadAddress(addr_ptr)); + return start + len; + } } fprintf(stderr, "Unhandled form type\n"); return NULL; } -const char* CompilationUnit::ProcessDIE(uint64 dieoffset, - const char* start, - const Abbrev& abbrev) { +const uint8_t *CompilationUnit::ProcessDIE(uint64 dieoffset, + const uint8_t *start, + const Abbrev& abbrev) { for (AttributeList::const_iterator i = abbrev.attributes.begin(); i != abbrev.attributes.end(); i++) { start = ProcessAttribute(dieoffset, start, i->first, i->second); } + + // If this is a compilation unit in a split DWARF object, verify that + // the dwo_id matches. If it does not match, we will ignore this + // compilation unit. + if (abbrev.tag == DW_TAG_compile_unit + && is_split_dwarf_ + && dwo_id_ != skeleton_dwo_id_) { + return NULL; + } + return start; } void CompilationUnit::ProcessDIEs() { - const char* dieptr = after_header_; + const uint8_t *dieptr = after_header_; size_t len; // lengthstart is the place the length field is based on. // It is the point in the header after the initial length field - const char* lengthstart = buffer_; + const uint8_t *lengthstart = buffer_; // In 64 bit dwarf, the initial length is 12 bytes, because of the // 0xffffffff at the start. @@ -500,7 +586,7 @@ void CompilationUnit::ProcessDIEs() { const Abbrev& abbrev = abbrevs_->at(static_cast<size_t>(abbrev_num)); const enum DwarfTag tag = abbrev.tag; - if (!handler_->StartDIE(absolute_offset, tag, abbrev.attributes)) { + if (!handler_->StartDIE(absolute_offset, tag)) { dieptr = SkipDIE(dieptr, abbrev); } else { dieptr = ProcessDIE(absolute_offset, dieptr, abbrev); @@ -514,10 +600,313 @@ void CompilationUnit::ProcessDIEs() { } } -LineInfo::LineInfo(const char* buffer, uint64 buffer_length, +// Check for a valid ELF file and return the Address size. +// Returns 0 if not a valid ELF file. +inline int GetElfWidth(const ElfReader& elf) { + if (elf.IsElf32File()) + return 4; + if (elf.IsElf64File()) + return 8; + return 0; +} + +void CompilationUnit::ProcessSplitDwarf() { + struct stat statbuf; + if (!have_checked_for_dwp_) { + // Look for a .dwp file in the same directory as the executable. + have_checked_for_dwp_ = true; + string dwp_suffix(".dwp"); + dwp_path_ = path_ + dwp_suffix; + if (stat(dwp_path_.c_str(), &statbuf) != 0) { + // Fall back to a split .debug file in the same directory. + string debug_suffix(".debug"); + dwp_path_ = path_; + size_t found = path_.rfind(debug_suffix); + if (found + debug_suffix.length() == path_.length()) + dwp_path_ = dwp_path_.replace(found, debug_suffix.length(), dwp_suffix); + } + if (stat(dwp_path_.c_str(), &statbuf) == 0) { + ElfReader* elf = new ElfReader(dwp_path_); + int width = GetElfWidth(*elf); + if (width != 0) { + dwp_byte_reader_.reset(new ByteReader(reader_->GetEndianness())); + dwp_byte_reader_->SetAddressSize(width); + dwp_reader_.reset(new DwpReader(*dwp_byte_reader_, elf)); + dwp_reader_->Initialize(); + } else { + delete elf; + } + } + } + bool found_in_dwp = false; + if (dwp_reader_) { + // If we have a .dwp file, read the debug sections for the requested CU. + SectionMap sections; + dwp_reader_->ReadDebugSectionsForCU(dwo_id_, §ions); + if (!sections.empty()) { + found_in_dwp = true; + CompilationUnit dwp_comp_unit(dwp_path_, sections, 0, + dwp_byte_reader_.get(), handler_); + dwp_comp_unit.SetSplitDwarf(addr_buffer_, addr_buffer_length_, addr_base_, + ranges_base_, dwo_id_); + dwp_comp_unit.Start(); + } + } + if (!found_in_dwp) { + // If no .dwp file, try to open the .dwo file. + if (stat(dwo_name_, &statbuf) == 0) { + ElfReader elf(dwo_name_); + int width = GetElfWidth(elf); + if (width != 0) { + ByteReader reader(ENDIANNESS_LITTLE); + reader.SetAddressSize(width); + SectionMap sections; + ReadDebugSectionsFromDwo(&elf, §ions); + CompilationUnit dwo_comp_unit(dwo_name_, sections, 0, &reader, + handler_); + dwo_comp_unit.SetSplitDwarf(addr_buffer_, addr_buffer_length_, + addr_base_, ranges_base_, dwo_id_); + dwo_comp_unit.Start(); + } + } + } +} + +void CompilationUnit::ReadDebugSectionsFromDwo(ElfReader* elf_reader, + SectionMap* sections) { + static const char* const section_names[] = { + ".debug_abbrev", + ".debug_info", + ".debug_str_offsets", + ".debug_str" + }; + for (unsigned int i = 0u; + i < sizeof(section_names)/sizeof(*(section_names)); ++i) { + string base_name = section_names[i]; + string dwo_name = base_name + ".dwo"; + size_t section_size; + const char* section_data = elf_reader->GetSectionByName(dwo_name, + §ion_size); + if (section_data != NULL) + sections->insert(std::make_pair( + base_name, std::make_pair( + reinterpret_cast<const uint8_t *>(section_data), + section_size))); + } +} + +DwpReader::DwpReader(const ByteReader& byte_reader, ElfReader* elf_reader) + : elf_reader_(elf_reader), byte_reader_(byte_reader), + cu_index_(NULL), cu_index_size_(0), string_buffer_(NULL), + string_buffer_size_(0), version_(0), ncolumns_(0), nunits_(0), + nslots_(0), phash_(NULL), pindex_(NULL), shndx_pool_(NULL), + offset_table_(NULL), size_table_(NULL), abbrev_data_(NULL), + abbrev_size_(0), info_data_(NULL), info_size_(0), + str_offsets_data_(NULL), str_offsets_size_(0) {} + +DwpReader::~DwpReader() { + if (elf_reader_) delete elf_reader_; +} + +void DwpReader::Initialize() { + cu_index_ = elf_reader_->GetSectionByName(".debug_cu_index", + &cu_index_size_); + if (cu_index_ == NULL) { + return; + } + // The .debug_str.dwo section is shared by all CUs in the file. + string_buffer_ = elf_reader_->GetSectionByName(".debug_str.dwo", + &string_buffer_size_); + + version_ = byte_reader_.ReadFourBytes( + reinterpret_cast<const uint8_t *>(cu_index_)); + + if (version_ == 1) { + nslots_ = byte_reader_.ReadFourBytes( + reinterpret_cast<const uint8_t *>(cu_index_) + + 3 * sizeof(uint32)); + phash_ = cu_index_ + 4 * sizeof(uint32); + pindex_ = phash_ + nslots_ * sizeof(uint64); + shndx_pool_ = pindex_ + nslots_ * sizeof(uint32); + if (shndx_pool_ >= cu_index_ + cu_index_size_) { + version_ = 0; + } + } else if (version_ == 2) { + ncolumns_ = byte_reader_.ReadFourBytes( + reinterpret_cast<const uint8_t *>(cu_index_) + sizeof(uint32)); + nunits_ = byte_reader_.ReadFourBytes( + reinterpret_cast<const uint8_t *>(cu_index_) + 2 * sizeof(uint32)); + nslots_ = byte_reader_.ReadFourBytes( + reinterpret_cast<const uint8_t *>(cu_index_) + 3 * sizeof(uint32)); + phash_ = cu_index_ + 4 * sizeof(uint32); + pindex_ = phash_ + nslots_ * sizeof(uint64); + offset_table_ = pindex_ + nslots_ * sizeof(uint32); + size_table_ = offset_table_ + ncolumns_ * (nunits_ + 1) * sizeof(uint32); + abbrev_data_ = elf_reader_->GetSectionByName(".debug_abbrev.dwo", + &abbrev_size_); + info_data_ = elf_reader_->GetSectionByName(".debug_info.dwo", &info_size_); + str_offsets_data_ = elf_reader_->GetSectionByName(".debug_str_offsets.dwo", + &str_offsets_size_); + if (size_table_ >= cu_index_ + cu_index_size_) { + version_ = 0; + } + } +} + +void DwpReader::ReadDebugSectionsForCU(uint64 dwo_id, + SectionMap* sections) { + if (version_ == 1) { + int slot = LookupCU(dwo_id); + if (slot == -1) { + return; + } + + // The index table points to the section index pool, where we + // can read a list of section indexes for the debug sections + // for the CU whose dwo_id we are looking for. + int index = byte_reader_.ReadFourBytes( + reinterpret_cast<const uint8_t *>(pindex_) + + slot * sizeof(uint32)); + const char* shndx_list = shndx_pool_ + index * sizeof(uint32); + for (;;) { + if (shndx_list >= cu_index_ + cu_index_size_) { + version_ = 0; + return; + } + unsigned int shndx = byte_reader_.ReadFourBytes( + reinterpret_cast<const uint8_t *>(shndx_list)); + shndx_list += sizeof(uint32); + if (shndx == 0) + break; + const char* section_name = elf_reader_->GetSectionName(shndx); + size_t section_size; + const char* section_data; + // We're only interested in these four debug sections. + // The section names in the .dwo file end with ".dwo", but we + // add them to the sections table with their normal names. + if (!strncmp(section_name, ".debug_abbrev", strlen(".debug_abbrev"))) { + section_data = elf_reader_->GetSectionByIndex(shndx, §ion_size); + sections->insert(std::make_pair( + ".debug_abbrev", + std::make_pair(reinterpret_cast<const uint8_t *> (section_data), + section_size))); + } else if (!strncmp(section_name, ".debug_info", strlen(".debug_info"))) { + section_data = elf_reader_->GetSectionByIndex(shndx, §ion_size); + sections->insert(std::make_pair( + ".debug_info", + std::make_pair(reinterpret_cast<const uint8_t *> (section_data), + section_size))); + } else if (!strncmp(section_name, ".debug_str_offsets", + strlen(".debug_str_offsets"))) { + section_data = elf_reader_->GetSectionByIndex(shndx, §ion_size); + sections->insert(std::make_pair( + ".debug_str_offsets", + std::make_pair(reinterpret_cast<const uint8_t *> (section_data), + section_size))); + } + } + sections->insert(std::make_pair( + ".debug_str", + std::make_pair(reinterpret_cast<const uint8_t *> (string_buffer_), + string_buffer_size_))); + } else if (version_ == 2) { + uint32 index = LookupCUv2(dwo_id); + if (index == 0) { + return; + } + + // The index points to a row in each of the section offsets table + // and the section size table, where we can read the offsets and sizes + // of the contributions to each debug section from the CU whose dwo_id + // we are looking for. Row 0 of the section offsets table has the + // section ids for each column of the table. The size table begins + // with row 1. + const char* id_row = offset_table_; + const char* offset_row = offset_table_ + + index * ncolumns_ * sizeof(uint32); + const char* size_row = + size_table_ + (index - 1) * ncolumns_ * sizeof(uint32); + if (size_row + ncolumns_ * sizeof(uint32) > cu_index_ + cu_index_size_) { + version_ = 0; + return; + } + for (unsigned int col = 0u; col < ncolumns_; ++col) { + uint32 section_id = + byte_reader_.ReadFourBytes(reinterpret_cast<const uint8_t *>(id_row) + + col * sizeof(uint32)); + uint32 offset = byte_reader_.ReadFourBytes( + reinterpret_cast<const uint8_t *>(offset_row) + + col * sizeof(uint32)); + uint32 size = byte_reader_.ReadFourBytes( + reinterpret_cast<const uint8_t *>(size_row) + col * sizeof(uint32)); + if (section_id == DW_SECT_ABBREV) { + sections->insert(std::make_pair( + ".debug_abbrev", + std::make_pair(reinterpret_cast<const uint8_t *> (abbrev_data_) + + offset, size))); + } else if (section_id == DW_SECT_INFO) { + sections->insert(std::make_pair( + ".debug_info", + std::make_pair(reinterpret_cast<const uint8_t *> (info_data_) + + offset, size))); + } else if (section_id == DW_SECT_STR_OFFSETS) { + sections->insert(std::make_pair( + ".debug_str_offsets", + std::make_pair(reinterpret_cast<const uint8_t *> (str_offsets_data_) + + offset, size))); + } + } + sections->insert(std::make_pair( + ".debug_str", + std::make_pair(reinterpret_cast<const uint8_t *> (string_buffer_), + string_buffer_size_))); + } +} + +int DwpReader::LookupCU(uint64 dwo_id) { + uint32 slot = static_cast<uint32>(dwo_id) & (nslots_ - 1); + uint64 probe = byte_reader_.ReadEightBytes( + reinterpret_cast<const uint8_t *>(phash_) + slot * sizeof(uint64)); + if (probe != 0 && probe != dwo_id) { + uint32 secondary_hash = + (static_cast<uint32>(dwo_id >> 32) & (nslots_ - 1)) | 1; + do { + slot = (slot + secondary_hash) & (nslots_ - 1); + probe = byte_reader_.ReadEightBytes( + reinterpret_cast<const uint8_t *>(phash_) + slot * sizeof(uint64)); + } while (probe != 0 && probe != dwo_id); + } + if (probe == 0) + return -1; + return slot; +} + +uint32 DwpReader::LookupCUv2(uint64 dwo_id) { + uint32 slot = static_cast<uint32>(dwo_id) & (nslots_ - 1); + uint64 probe = byte_reader_.ReadEightBytes( + reinterpret_cast<const uint8_t *>(phash_) + slot * sizeof(uint64)); + uint32 index = byte_reader_.ReadFourBytes( + reinterpret_cast<const uint8_t *>(pindex_) + slot * sizeof(uint32)); + if (index != 0 && probe != dwo_id) { + uint32 secondary_hash = + (static_cast<uint32>(dwo_id >> 32) & (nslots_ - 1)) | 1; + do { + slot = (slot + secondary_hash) & (nslots_ - 1); + probe = byte_reader_.ReadEightBytes( + reinterpret_cast<const uint8_t *>(phash_) + slot * sizeof(uint64)); + index = byte_reader_.ReadFourBytes( + reinterpret_cast<const uint8_t *>(pindex_) + slot * sizeof(uint32)); + } while (index != 0 && probe != dwo_id); + } + return index; +} + +LineInfo::LineInfo(const uint8_t *buffer, uint64 buffer_length, ByteReader* reader, LineInfoHandler* handler): - handler_(handler), reader_(reader), buffer_(buffer), - buffer_length_(buffer_length) { + handler_(handler), reader_(reader), buffer_(buffer) { +#ifndef NDEBUG + buffer_length_ = buffer_length; +#endif header_.std_opcode_lengths = NULL; } @@ -530,7 +919,7 @@ uint64 LineInfo::Start() { // The header for a debug_line section is mildly complicated, because // the line info is very tightly encoded. void LineInfo::ReadHeader() { - const char* lineptr = buffer_; + const uint8_t *lineptr = buffer_; size_t initial_length_size; const uint64 initial_length @@ -553,6 +942,13 @@ void LineInfo::ReadHeader() { header_.min_insn_length = reader_->ReadOneByte(lineptr); lineptr += 1; + if (header_.version >= 4) { + __attribute__((unused)) uint8 max_ops_per_insn = + reader_->ReadOneByte(lineptr); + ++lineptr; + assert(max_ops_per_insn == 1); + } + header_.default_is_stmt = reader_->ReadOneByte(lineptr); lineptr += 1; @@ -577,7 +973,7 @@ void LineInfo::ReadHeader() { if (*lineptr) { uint32 dirindex = 1; while (*lineptr) { - const char* dirname = lineptr; + const char *dirname = reinterpret_cast<const char *>(lineptr); handler_->DefineDir(dirname, dirindex); lineptr += strlen(dirname) + 1; dirindex++; @@ -590,7 +986,7 @@ void LineInfo::ReadHeader() { uint32 fileindex = 1; size_t len; while (*lineptr) { - const char* filename = lineptr; + const char *filename = reinterpret_cast<const char *>(lineptr); lineptr += strlen(filename) + 1; uint64 dirindex = reader_->ReadUnsignedLEB128(lineptr, &len); @@ -615,7 +1011,7 @@ void LineInfo::ReadHeader() { bool LineInfo::ProcessOneOpcode(ByteReader* reader, LineInfoHandler* handler, const struct LineInfoHeader &header, - const char* start, + const uint8_t *start, struct LineStateMachine* lsm, size_t* len, uintptr pc, @@ -756,7 +1152,7 @@ bool LineInfo::ProcessOneOpcode(ByteReader* reader, } break; case DW_LNE_define_file: { - const char* filename = start; + const char *filename = reinterpret_cast<const char *>(start); templen = strlen(filename) + 1; start += templen; @@ -803,7 +1199,7 @@ void LineInfo::ReadLines() { // lengthstart is the place the length field is based on. // It is the point in the header after the initial length field - const char* lengthstart = buffer_; + const uint8_t *lengthstart = buffer_; // In 64 bit dwarf, the initial length is 12 bytes, because of the // 0xffffffff at the start. @@ -812,7 +1208,7 @@ void LineInfo::ReadLines() { else lengthstart += 4; - const char* lineptr = after_header_; + const uint8_t *lineptr = after_header_; lsm.Reset(header_.default_is_stmt); // The LineInfoHandler interface expects each line's length along @@ -1311,7 +1707,7 @@ class CallFrameInfo::State { const Entry *entry_; // The next instruction to process. - const char *cursor_; + const uint8_t *cursor_; // The current set of rules. RuleMap rules_; @@ -1409,7 +1805,8 @@ bool CallFrameInfo::State::ParseOperands(const char *format, if (len > bytes_left || expression_length > bytes_left - len) return ReportIncomplete(); cursor_ += len; - operands->expression = string(cursor_, expression_length); + operands->expression = string(reinterpret_cast<const char *>(cursor_), + expression_length); cursor_ += expression_length; break; } @@ -1512,16 +1909,19 @@ bool CallFrameInfo::State::DoInstruction() { // Change the base register used to compute the CFA. case DW_CFA_def_cfa_register: { + if (!ParseOperands("r", &ops)) return false; Rule *cfa_rule = rules_.CFARule(); if (!cfa_rule) { - reporter_->NoCFARule(entry_->offset, entry_->kind, CursorOffset()); + if (!DoDefCFA(ops.register_number, ops.offset)) { + reporter_->NoCFARule(entry_->offset, entry_->kind, CursorOffset()); + return false; + } + } else { + cfa_rule->SetBaseRegister(ops.register_number); + if (!cfa_rule->Handle(handler_, address_, + Handler::kCFARegister)) return false; } - if (!ParseOperands("r", &ops)) return false; - cfa_rule->SetBaseRegister(ops.register_number); - if (!cfa_rule->Handle(handler_, address_, - Handler::kCFARegister)) - return false; break; } @@ -1759,8 +2159,8 @@ bool CallFrameInfo::State::DoRestore(unsigned reg) { return DoRule(reg, rule); } -bool CallFrameInfo::ReadEntryPrologue(const char *cursor, Entry *entry) { - const char *buffer_end = buffer_ + buffer_length_; +bool CallFrameInfo::ReadEntryPrologue(const uint8_t *cursor, Entry *entry) { + const uint8_t *buffer_end = buffer_ + buffer_length_; // Initialize enough of ENTRY for use in error reporting. entry->offset = cursor - buffer_; @@ -1838,7 +2238,7 @@ bool CallFrameInfo::ReadEntryPrologue(const char *cursor, Entry *entry) { } bool CallFrameInfo::ReadCIEFields(CIE *cie) { - const char *cursor = cie->fields; + const uint8_t *cursor = cie->fields; size_t len; assert(cie->kind == kCIE); @@ -1860,22 +2260,23 @@ bool CallFrameInfo::ReadCIEFields(CIE *cie) { cursor++; // If we don't recognize the version, we can't parse any more fields of the - // CIE. For DWARF CFI, we handle versions 1 through 3 (there was never a - // version 2 of CFI data). For .eh_frame, we handle versions 1 and 3 as well; + // CIE. For DWARF CFI, we handle versions 1 through 4 (there was never a + // version 2 of CFI data). For .eh_frame, we handle versions 1 and 4 as well; // the difference between those versions seems to be the same as for // .debug_frame. - if (cie->version < 1 || cie->version > 3) { + if (cie->version < 1 || cie->version > 4) { reporter_->UnrecognizedVersion(cie->offset, cie->version); return false; } - const char *augmentation_start = cursor; - const void *augmentation_end = - memchr(augmentation_start, '\0', cie->end - augmentation_start); + const uint8_t *augmentation_start = cursor; + const uint8_t *augmentation_end = + reinterpret_cast<const uint8_t *>(memchr(augmentation_start, '\0', + cie->end - augmentation_start)); if (! augmentation_end) return ReportIncomplete(cie); - cursor = static_cast<const char *>(augmentation_end); - cie->augmentation = string(augmentation_start, - cursor - augmentation_start); + cursor = augmentation_end; + cie->augmentation = string(reinterpret_cast<const char *>(augmentation_start), + cursor - augmentation_start); // Skip the terminating '\0'. cursor++; @@ -1893,16 +2294,36 @@ bool CallFrameInfo::ReadCIEFields(CIE *cie) { } } + if (cie->version >= 4) { + uint8_t address_size = *cursor++; + if (address_size != 8) { + // TODO(scottmg): Only supporting x64 for now. + reporter_->UnexpectedAddressSize(cie->offset, address_size); + return false; + } + + uint8_t segment_size = *cursor++; + if (segment_size != 0) { + // TODO(scottmg): Only supporting x64 for now. + // I would have perhaps expected 4 here, but LLVM emits a 0, near + // http://llvm.org/docs/doxygen/html/MCDwarf_8cpp_source.html#l00606. As + // we are not using the value, only succeed for now if it's the expected + // 0. + reporter_->UnexpectedSegmentSize(cie->offset, segment_size); + return false; + } + } + // Parse the code alignment factor. cie->code_alignment_factor = reader_->ReadUnsignedLEB128(cursor, &len); if (size_t(cie->end - cursor) < len) return ReportIncomplete(cie); cursor += len; - + // Parse the data alignment factor. cie->data_alignment_factor = reader_->ReadSignedLEB128(cursor, &len); if (size_t(cie->end - cursor) < len) return ReportIncomplete(cie); cursor += len; - + // Parse the return address register. This is a ubyte in version 1, and // a ULEB128 in version 3. if (cie->version == 1) { @@ -1921,9 +2342,9 @@ bool CallFrameInfo::ReadCIEFields(CIE *cie) { if (size_t(cie->end - cursor) < len + data_size) return ReportIncomplete(cie); cursor += len; - const char *data = cursor; + const uint8_t *data = cursor; cursor += data_size; - const char *data_end = cursor; + const uint8_t *data_end = cursor; cie->has_z_lsda = false; cie->has_z_personality = false; @@ -2013,9 +2434,9 @@ bool CallFrameInfo::ReadCIEFields(CIE *cie) { return true; } - + bool CallFrameInfo::ReadFDEFields(FDE *fde) { - const char *cursor = fde->fields; + const uint8_t *cursor = fde->fields; size_t size; fde->address = reader_->ReadEncodedPointer(cursor, fde->cie->pointer_encoding, @@ -2081,10 +2502,10 @@ bool CallFrameInfo::ReadFDEFields(FDE *fde) { } bool CallFrameInfo::Start() { - const char *buffer_end = buffer_ + buffer_length_; - const char *cursor; + const uint8_t *buffer_end = buffer_ + buffer_length_; + const uint8_t *cursor; bool all_ok = true; - const char *entry_end; + const uint8_t *entry_end; bool ok; // Traverse all the entries in buffer_, skipping CIEs and offering @@ -2254,6 +2675,22 @@ void CallFrameInfo::Reporter::BadCIEId(uint64 offset, uint64 cie_offset) { filename_.c_str(), offset, section_.c_str(), cie_offset); } +void CallFrameInfo::Reporter::UnexpectedAddressSize(uint64 offset, + uint8_t address_size) { + fprintf(stderr, + "%s: CFI frame description entry at offset 0x%llx in '%s':" + " CIE specifies unexpected address size: %d\n", + filename_.c_str(), offset, section_.c_str(), address_size); +} + +void CallFrameInfo::Reporter::UnexpectedSegmentSize(uint64 offset, + uint8_t segment_size) { + fprintf(stderr, + "%s: CFI frame description entry at offset 0x%llx in '%s':" + " CIE specifies unexpected segment size: %d\n", + filename_.c_str(), offset, section_.c_str(), segment_size); +} + void CallFrameInfo::Reporter::UnrecognizedVersion(uint64 offset, int version) { fprintf(stderr, "%s: CFI frame description entry at offset 0x%llx in '%s':" diff --git a/3rdParty/Breakpad/src/common/dwarf/dwarf2reader.h b/3rdParty/Breakpad/src/common/dwarf/dwarf2reader.h index ecf4eb2..5d2d7f6 100644 --- a/3rdParty/Breakpad/src/common/dwarf/dwarf2reader.h +++ b/3rdParty/Breakpad/src/common/dwarf/dwarf2reader.h @@ -40,25 +40,30 @@ #ifndef COMMON_DWARF_DWARF2READER_H__ #define COMMON_DWARF_DWARF2READER_H__ +#include <stdint.h> + #include <list> #include <map> #include <string> #include <utility> #include <vector> +#include <memory> #include "common/dwarf/bytereader.h" #include "common/dwarf/dwarf2enums.h" #include "common/dwarf/types.h" #include "common/using_std_string.h" +#include "common/dwarf/elf_reader.h" namespace dwarf2reader { struct LineStateMachine; class Dwarf2Handler; class LineInfoHandler; +class DwpReader; // This maps from a string naming a section to a pair containing a // the data for the section, and the size of the section. -typedef std::map<string, std::pair<const char*, uint64> > SectionMap; +typedef std::map<string, std::pair<const uint8_t *, uint64> > SectionMap; typedef std::list<std::pair<enum DwarfAttribute, enum DwarfForm> > AttributeList; typedef AttributeList::iterator AttributeIterator; @@ -85,7 +90,7 @@ class LineInfo { // to the beginning and length of the line information to read. // Reader is a ByteReader class that has the endianness set // properly. - LineInfo(const char* buffer_, uint64 buffer_length, + LineInfo(const uint8_t *buffer_, uint64 buffer_length, ByteReader* reader, LineInfoHandler* handler); virtual ~LineInfo() { @@ -111,7 +116,7 @@ class LineInfo { static bool ProcessOneOpcode(ByteReader* reader, LineInfoHandler* handler, const struct LineInfoHeader &header, - const char* start, + const uint8_t *start, struct LineStateMachine* lsm, size_t* len, uintptr pc, @@ -139,9 +144,11 @@ class LineInfo { // buffer is the buffer for our line info, starting at exactly where // the line info to read is. after_header is the place right after // the end of the line information header. - const char* buffer_; + const uint8_t *buffer_; +#ifndef NDEBUG uint64 buffer_length_; - const char* after_header_; +#endif + const uint8_t *after_header_; }; // This class is the main interface between the line info reader and @@ -180,6 +187,106 @@ class LineInfoHandler { uint32 file_num, uint32 line_num, uint32 column_num) { } }; +// This class is the main interface between the reader and the +// client. The virtual functions inside this get called for +// interesting events that happen during DWARF2 reading. +// The default implementation skips everything. +class Dwarf2Handler { + public: + Dwarf2Handler() { } + + virtual ~Dwarf2Handler() { } + + // Start to process a compilation unit at OFFSET from the beginning of the + // .debug_info section. Return false if you would like to skip this + // compilation unit. + virtual bool StartCompilationUnit(uint64 offset, uint8 address_size, + uint8 offset_size, uint64 cu_length, + uint8 dwarf_version) { return false; } + + // When processing a skeleton compilation unit, resulting from a split + // DWARF compilation, once the skeleton debug info has been read, + // the reader will call this function to ask the client if it needs + // the full debug info from the .dwo or .dwp file. Return true if + // you need it, or false to skip processing the split debug info. + virtual bool NeedSplitDebugInfo() { return true; } + + // Start to process a split compilation unit at OFFSET from the beginning of + // the debug_info section in the .dwp/.dwo file. Return false if you would + // like to skip this compilation unit. + virtual bool StartSplitCompilationUnit(uint64 offset, + uint64 cu_length) { return false; } + + // Start to process a DIE at OFFSET from the beginning of the .debug_info + // section. Return false if you would like to skip this DIE. + virtual bool StartDIE(uint64 offset, enum DwarfTag tag) { return false; } + + // Called when we have an attribute with unsigned data to give to our + // handler. The attribute is for the DIE at OFFSET from the beginning of the + // .debug_info section. Its name is ATTR, its form is FORM, and its value is + // DATA. + virtual void ProcessAttributeUnsigned(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + uint64 data) { } + + // Called when we have an attribute with signed data to give to our handler. + // The attribute is for the DIE at OFFSET from the beginning of the + // .debug_info section. Its name is ATTR, its form is FORM, and its value is + // DATA. + virtual void ProcessAttributeSigned(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + int64 data) { } + + // Called when we have an attribute whose value is a reference to + // another DIE. The attribute belongs to the DIE at OFFSET from the + // beginning of the .debug_info section. Its name is ATTR, its form + // is FORM, and the offset of the DIE being referred to from the + // beginning of the .debug_info section is DATA. + virtual void ProcessAttributeReference(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + uint64 data) { } + + // Called when we have an attribute with a buffer of data to give to our + // handler. The attribute is for the DIE at OFFSET from the beginning of the + // .debug_info section. Its name is ATTR, its form is FORM, DATA points to + // the buffer's contents, and its length in bytes is LENGTH. The buffer is + // owned by the caller, not the callee, and may not persist for very long. + // If you want the data to be available later, it needs to be copied. + virtual void ProcessAttributeBuffer(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + const uint8_t *data, + uint64 len) { } + + // Called when we have an attribute with string data to give to our handler. + // The attribute is for the DIE at OFFSET from the beginning of the + // .debug_info section. Its name is ATTR, its form is FORM, and its value is + // DATA. + virtual void ProcessAttributeString(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + const string& data) { } + + // Called when we have an attribute whose value is the 64-bit signature + // of a type unit in the .debug_types section. OFFSET is the offset of + // the DIE whose attribute we're reporting. ATTR and FORM are the + // attribute's name and form. SIGNATURE is the type unit's signature. + virtual void ProcessAttributeSignature(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + uint64 signature) { } + + // Called when finished processing the DIE at OFFSET. + // Because DWARF2/3 specifies a tree of DIEs, you may get starts + // before ends of the previous DIE, as we process children before + // ending the parent. + virtual void EndDIE(uint64 offset) { } + +}; + // The base of DWARF2/3 debug info is a DIE (Debugging Information // Entry. // DWARF groups DIE's into a tree and calls the root of this tree a @@ -221,12 +328,21 @@ class CompilationUnit { // Initialize a compilation unit. This requires a map of sections, // the offset of this compilation unit in the .debug_info section, a // ByteReader, and a Dwarf2Handler class to call callbacks in. - CompilationUnit(const SectionMap& sections, uint64 offset, + CompilationUnit(const string& path, const SectionMap& sections, uint64 offset, ByteReader* reader, Dwarf2Handler* handler); virtual ~CompilationUnit() { if (abbrevs_) delete abbrevs_; } + // Initialize a compilation unit from a .dwo or .dwp file. + // In this case, we need the .debug_addr section from the + // executable file that contains the corresponding skeleton + // compilation unit. We also inherit the Dwarf2Handler from + // the executable file, and call it as if we were still + // processing the original compilation unit. + void SetSplitDwarf(const uint8_t* addr_buffer, uint64 addr_buffer_length, + uint64 addr_base, uint64 ranges_base, uint64 dwo_id); + // Begin reading a Dwarf2 compilation unit, and calling the // callbacks in the Dwarf2Handler @@ -266,29 +382,104 @@ class CompilationUnit { // Processes a single DIE for this compilation unit and return a new // pointer just past the end of it - const char* ProcessDIE(uint64 dieoffset, - const char* start, - const Abbrev& abbrev); + const uint8_t *ProcessDIE(uint64 dieoffset, + const uint8_t *start, + const Abbrev& abbrev); // Processes a single attribute and return a new pointer just past the // end of it - const char* ProcessAttribute(uint64 dieoffset, - const char* start, - enum DwarfAttribute attr, - enum DwarfForm form); + const uint8_t *ProcessAttribute(uint64 dieoffset, + const uint8_t *start, + enum DwarfAttribute attr, + enum DwarfForm form); + + // Called when we have an attribute with unsigned data to give to + // our handler. The attribute is for the DIE at OFFSET from the + // beginning of compilation unit, has a name of ATTR, a form of + // FORM, and the actual data of the attribute is in DATA. + // If we see a DW_AT_GNU_dwo_id attribute, save the value so that + // we can find the debug info in a .dwo or .dwp file. + void ProcessAttributeUnsigned(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + uint64 data) { + if (attr == DW_AT_GNU_dwo_id) { + dwo_id_ = data; + } + else if (attr == DW_AT_GNU_addr_base) { + addr_base_ = data; + } + else if (attr == DW_AT_GNU_ranges_base) { + ranges_base_ = data; + } + // TODO(yunlian): When we add DW_AT_ranges_base from DWARF-5, + // that base will apply to DW_AT_ranges attributes in the + // skeleton CU as well as in the .dwo/.dwp files. + else if (attr == DW_AT_ranges && is_split_dwarf_) { + data += ranges_base_; + } + handler_->ProcessAttributeUnsigned(offset, attr, form, data); + } + + // Called when we have an attribute with signed data to give to + // our handler. The attribute is for the DIE at OFFSET from the + // beginning of compilation unit, has a name of ATTR, a form of + // FORM, and the actual data of the attribute is in DATA. + void ProcessAttributeSigned(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + int64 data) { + handler_->ProcessAttributeSigned(offset, attr, form, data); + } + + // Called when we have an attribute with a buffer of data to give to + // our handler. The attribute is for the DIE at OFFSET from the + // beginning of compilation unit, has a name of ATTR, a form of + // FORM, and the actual data of the attribute is in DATA, and the + // length of the buffer is LENGTH. + void ProcessAttributeBuffer(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + const uint8_t* data, + uint64 len) { + handler_->ProcessAttributeBuffer(offset, attr, form, data, len); + } + + // Called when we have an attribute with string data to give to + // our handler. The attribute is for the DIE at OFFSET from the + // beginning of compilation unit, has a name of ATTR, a form of + // FORM, and the actual data of the attribute is in DATA. + // If we see a DW_AT_GNU_dwo_name attribute, save the value so + // that we can find the debug info in a .dwo or .dwp file. + void ProcessAttributeString(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + const char* data) { + if (attr == DW_AT_GNU_dwo_name) + dwo_name_ = data; + handler_->ProcessAttributeString(offset, attr, form, data); + } // Processes all DIEs for this compilation unit void ProcessDIEs(); // Skips the die with attributes specified in ABBREV starting at // START, and return the new place to position the stream to. - const char* SkipDIE(const char* start, - const Abbrev& abbrev); + const uint8_t *SkipDIE(const uint8_t *start, const Abbrev& abbrev); // Skips the attribute starting at START, with FORM, and return the // new place to position the stream to. - const char* SkipAttribute(const char* start, - enum DwarfForm form); + const uint8_t *SkipAttribute(const uint8_t *start, enum DwarfForm form); + + // Process the actual debug information in a split DWARF file. + void ProcessSplitDwarf(); + + // Read the debug sections from a .dwo file. + void ReadDebugSectionsFromDwo(ElfReader* elf_reader, + SectionMap* sections); + + // Path of the file containing the debug information. + const string path_; // Offset from section start is the offset of this compilation unit // from the beginning of the .debug_info section. @@ -297,9 +488,9 @@ class CompilationUnit { // buffer is the buffer for our CU, starting at .debug_info + offset // passed in from constructor. // after_header points to right after the compilation unit header. - const char* buffer_; + const uint8_t *buffer_; uint64 buffer_length_; - const char* after_header_; + const uint8_t *after_header_; // The associated ByteReader that handles endianness issues for us ByteReader* reader_; @@ -318,97 +509,143 @@ class CompilationUnit { // String section buffer and length, if we have a string section. // This is here to avoid doing a section lookup for strings in // ProcessAttribute, which is in the hot path for DWARF2 reading. - const char* string_buffer_; + const uint8_t *string_buffer_; uint64 string_buffer_length_; -}; -// This class is the main interface between the reader and the -// client. The virtual functions inside this get called for -// interesting events that happen during DWARF2 reading. -// The default implementation skips everything. + // String offsets section buffer and length, if we have a string offsets + // section (.debug_str_offsets or .debug_str_offsets.dwo). + const uint8_t* str_offsets_buffer_; + uint64 str_offsets_buffer_length_; -class Dwarf2Handler { + // Address section buffer and length, if we have an address section + // (.debug_addr). + const uint8_t* addr_buffer_; + uint64 addr_buffer_length_; + + // Flag indicating whether this compilation unit is part of a .dwo + // or .dwp file. If true, we are reading this unit because a + // skeleton compilation unit in an executable file had a + // DW_AT_GNU_dwo_name or DW_AT_GNU_dwo_id attribute. + // In a .dwo file, we expect the string offsets section to + // have a ".dwo" suffix, and we will use the ".debug_addr" section + // associated with the skeleton compilation unit. + bool is_split_dwarf_; + + // The value of the DW_AT_GNU_dwo_id attribute, if any. + uint64 dwo_id_; + + // The value of the DW_AT_GNU_dwo_name attribute, if any. + const char* dwo_name_; + + // If this is a split DWARF CU, the value of the DW_AT_GNU_dwo_id attribute + // from the skeleton CU. + uint64 skeleton_dwo_id_; + + // The value of the DW_AT_GNU_ranges_base attribute, if any. + uint64 ranges_base_; + + // The value of the DW_AT_GNU_addr_base attribute, if any. + uint64 addr_base_; + + // True if we have already looked for a .dwp file. + bool have_checked_for_dwp_; + + // Path to the .dwp file. + string dwp_path_; + + // ByteReader for the DWP file. + std::unique_ptr<ByteReader> dwp_byte_reader_; + + // DWP reader. + std::unique_ptr<DwpReader> dwp_reader_; +}; + +// A Reader for a .dwp file. Supports the fetching of DWARF debug +// info for a given dwo_id. +// +// There are two versions of .dwp files. In both versions, the +// .dwp file is an ELF file containing only debug sections. +// In Version 1, the file contains many copies of each debug +// section, one for each .dwo file that is packaged in the .dwp +// file, and the .debug_cu_index section maps from the dwo_id +// to a set of section indexes. In Version 2, the file contains +// one of each debug section, and the .debug_cu_index section +// maps from the dwo_id to a set of offsets and lengths that +// identify each .dwo file's contribution to the larger sections. + +class DwpReader { public: - Dwarf2Handler() { } + DwpReader(const ByteReader& byte_reader, ElfReader* elf_reader); - virtual ~Dwarf2Handler() { } + ~DwpReader(); - // Start to process a compilation unit at OFFSET from the beginning of the - // .debug_info section. Return false if you would like to skip this - // compilation unit. - virtual bool StartCompilationUnit(uint64 offset, uint8 address_size, - uint8 offset_size, uint64 cu_length, - uint8 dwarf_version) { return false; } + // Read the CU index and initialize data members. + void Initialize(); - // Start to process a DIE at OFFSET from the beginning of the .debug_info - // section. Return false if you would like to skip this DIE. - virtual bool StartDIE(uint64 offset, enum DwarfTag tag, - const AttributeList& attrs) { return false; } + // Read the debug sections for the given dwo_id. + void ReadDebugSectionsForCU(uint64 dwo_id, SectionMap* sections); - // Called when we have an attribute with unsigned data to give to our - // handler. The attribute is for the DIE at OFFSET from the beginning of the - // .debug_info section. Its name is ATTR, its form is FORM, and its value is - // DATA. - virtual void ProcessAttributeUnsigned(uint64 offset, - enum DwarfAttribute attr, - enum DwarfForm form, - uint64 data) { } + private: + // Search a v1 hash table for "dwo_id". Returns the slot index + // where the dwo_id was found, or -1 if it was not found. + int LookupCU(uint64 dwo_id); - // Called when we have an attribute with signed data to give to our handler. - // The attribute is for the DIE at OFFSET from the beginning of the - // .debug_info section. Its name is ATTR, its form is FORM, and its value is - // DATA. - virtual void ProcessAttributeSigned(uint64 offset, - enum DwarfAttribute attr, - enum DwarfForm form, - int64 data) { } + // Search a v2 hash table for "dwo_id". Returns the row index + // in the offsets and sizes tables, or 0 if it was not found. + uint32 LookupCUv2(uint64 dwo_id); - // Called when we have an attribute whose value is a reference to - // another DIE. The attribute belongs to the DIE at OFFSET from the - // beginning of the .debug_info section. Its name is ATTR, its form - // is FORM, and the offset of the DIE being referred to from the - // beginning of the .debug_info section is DATA. - virtual void ProcessAttributeReference(uint64 offset, - enum DwarfAttribute attr, - enum DwarfForm form, - uint64 data) { } + // The ELF reader for the .dwp file. + ElfReader* elf_reader_; - // Called when we have an attribute with a buffer of data to give to our - // handler. The attribute is for the DIE at OFFSET from the beginning of the - // .debug_info section. Its name is ATTR, its form is FORM, DATA points to - // the buffer's contents, and its length in bytes is LENGTH. The buffer is - // owned by the caller, not the callee, and may not persist for very long. - // If you want the data to be available later, it needs to be copied. - virtual void ProcessAttributeBuffer(uint64 offset, - enum DwarfAttribute attr, - enum DwarfForm form, - const char* data, - uint64 len) { } + // The ByteReader for the .dwp file. + const ByteReader& byte_reader_; - // Called when we have an attribute with string data to give to our handler. - // The attribute is for the DIE at OFFSET from the beginning of the - // .debug_info section. Its name is ATTR, its form is FORM, and its value is - // DATA. - virtual void ProcessAttributeString(uint64 offset, - enum DwarfAttribute attr, - enum DwarfForm form, - const string& data) { } + // Pointer to the .debug_cu_index section. + const char* cu_index_; - // Called when we have an attribute whose value is the 64-bit signature - // of a type unit in the .debug_types section. OFFSET is the offset of - // the DIE whose attribute we're reporting. ATTR and FORM are the - // attribute's name and form. SIGNATURE is the type unit's signature. - virtual void ProcessAttributeSignature(uint64 offset, - enum DwarfAttribute attr, - enum DwarfForm form, - uint64 signature) { } + // Size of the .debug_cu_index section. + size_t cu_index_size_; - // Called when finished processing the DIE at OFFSET. - // Because DWARF2/3 specifies a tree of DIEs, you may get starts - // before ends of the previous DIE, as we process children before - // ending the parent. - virtual void EndDIE(uint64 offset) { } + // Pointer to the .debug_str.dwo section. + const char* string_buffer_; + // Size of the .debug_str.dwo section. + size_t string_buffer_size_; + + // Version of the .dwp file. We support versions 1 and 2 currently. + int version_; + + // Number of columns in the section tables (version 2). + unsigned int ncolumns_; + + // Number of units in the section tables (version 2). + unsigned int nunits_; + + // Number of slots in the hash table. + unsigned int nslots_; + + // Pointer to the beginning of the hash table. + const char* phash_; + + // Pointer to the beginning of the index table. + const char* pindex_; + + // Pointer to the beginning of the section index pool (version 1). + const char* shndx_pool_; + + // Pointer to the beginning of the section offset table (version 2). + const char* offset_table_; + + // Pointer to the beginning of the section size table (version 2). + const char* size_table_; + + // Contents of the sections of interest (version 2). + const char* abbrev_data_; + size_t abbrev_size_; + const char* info_data_; + size_t info_size_; + const char* str_offsets_data_; + size_t str_offsets_size_; }; // This class is a reader for DWARF's Call Frame Information. CFI @@ -638,7 +875,7 @@ class CallFrameInfo { // The mechanics of C++ exception handling, personality routines, // and language-specific data areas are described here, rather nicely: // http://www.codesourcery.com/public/cxx-abi/abi-eh.html - CallFrameInfo(const char *buffer, size_t buffer_length, + CallFrameInfo(const uint8_t *buffer, size_t buffer_length, ByteReader *reader, Handler *handler, Reporter *reporter, bool eh_frame = false) : buffer_(buffer), buffer_length_(buffer_length), @@ -666,7 +903,7 @@ class CallFrameInfo { size_t offset; // The start of this entry in the buffer. - const char *start; + const uint8_t *start; // Which kind of entry this is. // @@ -677,16 +914,16 @@ class CallFrameInfo { // The end of this entry's common prologue (initial length and id), and // the start of this entry's kind-specific fields. - const char *fields; + const uint8_t *fields; // The start of this entry's instructions. - const char *instructions; + const uint8_t *instructions; // The address past the entry's last byte in the buffer. (Note that // since offset points to the entry's initial length field, and the // length field is the number of bytes after that field, this is not // simply buffer_ + offset + length.) - const char *end; + const uint8_t *end; // For both DWARF CFI and .eh_frame sections, this is the CIE id in a // CIE, and the offset of the associated CIE in an FDE. @@ -763,7 +1000,7 @@ class CallFrameInfo { // true. On failure, report the problem, and return false. Even if we // return false, set ENTRY->end to the first byte after the entry if we // were able to figure that out, or NULL if we weren't. - bool ReadEntryPrologue(const char *cursor, Entry *entry); + bool ReadEntryPrologue(const uint8_t *cursor, Entry *entry); // Parse the fields of a CIE after the entry prologue, including any 'z' // augmentation data. Assume that the 'Entry' fields of CIE are @@ -791,7 +1028,7 @@ class CallFrameInfo { } // The contents of the DWARF .debug_info section we're parsing. - const char *buffer_; + const uint8_t *buffer_; size_t buffer_length_; // For reading multi-byte values with the appropriate endianness. @@ -990,6 +1227,14 @@ class CallFrameInfo::Reporter { // there is not a CIE. virtual void BadCIEId(uint64 offset, uint64 cie_offset); + // The FDE at OFFSET refers to a CIE with an address size we don't know how + // to handle. + virtual void UnexpectedAddressSize(uint64 offset, uint8_t address_size); + + // The FDE at OFFSET refers to a CIE with an segment descriptor size we + // don't know how to handle. + virtual void UnexpectedSegmentSize(uint64 offset, uint8_t segment_size); + // The FDE at OFFSET refers to a CIE with version number VERSION, // which we don't recognize. We cannot parse DWARF CFI if it uses // a version number we don't recognize. diff --git a/3rdParty/Breakpad/src/common/dwarf/dwarf2reader_cfi_unittest.cc b/3rdParty/Breakpad/src/common/dwarf/dwarf2reader_cfi_unittest.cc new file mode 100644 index 0000000..38cc7ea --- /dev/null +++ b/3rdParty/Breakpad/src/common/dwarf/dwarf2reader_cfi_unittest.cc @@ -0,0 +1,2555 @@ +// Copyright (c) 2010, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com> + +// dwarf2reader_cfi_unittest.cc: Unit tests for dwarf2reader::CallFrameInfo + +#include <stdint.h> +#include <stdlib.h> + +#include <string> +#include <vector> + +// The '.eh_frame' format, used by the Linux C++ ABI for exception +// handling, is poorly specified. To help test our support for .eh_frame, +// if you #define WRITE_ELF while compiling this file, and add the +// 'include' directory from the binutils, gcc, or gdb source tree to the +// #include path, then each test that calls the +// PERHAPS_WRITE_DEBUG_FRAME_FILE or PERHAPS_WRITE_EH_FRAME_FILE will write +// an ELF file containing a .debug_frame or .eh_frame section; you can then +// use tools like readelf to examine the test data, and check the tools' +// interpretation against the test's intentions. Each ELF file is named +// "cfitest-TEST", where TEST identifies the particular test. +#ifdef WRITE_ELF +#include <errno.h> +#include <stdio.h> +#include <string.h> +extern "C" { +// To compile with WRITE_ELF, you should add the 'include' directory +// of the binutils, gcc, or gdb source tree to your #include path; +// that directory contains this header. +#include "elf/common.h" +} +#endif + +#include "breakpad_googletest_includes.h" +#include "common/dwarf/bytereader-inl.h" +#include "common/dwarf/cfi_assembler.h" +#include "common/dwarf/dwarf2reader.h" +#include "common/using_std_string.h" +#include "google_breakpad/common/breakpad_types.h" + +using google_breakpad::CFISection; +using google_breakpad::test_assembler::Label; +using google_breakpad::test_assembler::kBigEndian; +using google_breakpad::test_assembler::kLittleEndian; +using google_breakpad::test_assembler::Section; + +using dwarf2reader::DwarfPointerEncoding; +using dwarf2reader::ENDIANNESS_BIG; +using dwarf2reader::ENDIANNESS_LITTLE; +using dwarf2reader::ByteReader; +using dwarf2reader::CallFrameInfo; + +using std::vector; +using testing::InSequence; +using testing::Return; +using testing::Sequence; +using testing::Test; +using testing::_; + +#ifdef WRITE_ELF +void WriteELFFrameSection(const char *filename, const char *section_name, + const CFISection §ion); +#define PERHAPS_WRITE_DEBUG_FRAME_FILE(name, section) \ + WriteELFFrameSection("cfitest-" name, ".debug_frame", section); +#define PERHAPS_WRITE_EH_FRAME_FILE(name, section) \ + WriteELFFrameSection("cfitest-" name, ".eh_frame", section); +#else +#define PERHAPS_WRITE_DEBUG_FRAME_FILE(name, section) +#define PERHAPS_WRITE_EH_FRAME_FILE(name, section) +#endif + +class MockCallFrameInfoHandler: public CallFrameInfo::Handler { + public: + MOCK_METHOD6(Entry, bool(size_t offset, uint64 address, uint64 length, + uint8 version, const string &augmentation, + unsigned return_address)); + MOCK_METHOD2(UndefinedRule, bool(uint64 address, int reg)); + MOCK_METHOD2(SameValueRule, bool(uint64 address, int reg)); + MOCK_METHOD4(OffsetRule, bool(uint64 address, int reg, int base_register, + long offset)); + MOCK_METHOD4(ValOffsetRule, bool(uint64 address, int reg, int base_register, + long offset)); + MOCK_METHOD3(RegisterRule, bool(uint64 address, int reg, int base_register)); + MOCK_METHOD3(ExpressionRule, bool(uint64 address, int reg, + const string &expression)); + MOCK_METHOD3(ValExpressionRule, bool(uint64 address, int reg, + const string &expression)); + MOCK_METHOD0(End, bool()); + MOCK_METHOD2(PersonalityRoutine, bool(uint64 address, bool indirect)); + MOCK_METHOD2(LanguageSpecificDataArea, bool(uint64 address, bool indirect)); + MOCK_METHOD0(SignalHandler, bool()); +}; + +class MockCallFrameErrorReporter: public CallFrameInfo::Reporter { + public: + MockCallFrameErrorReporter() : Reporter("mock filename", "mock section") { } + MOCK_METHOD2(Incomplete, void(uint64, CallFrameInfo::EntryKind)); + MOCK_METHOD1(EarlyEHTerminator, void(uint64)); + MOCK_METHOD2(CIEPointerOutOfRange, void(uint64, uint64)); + MOCK_METHOD2(BadCIEId, void(uint64, uint64)); + MOCK_METHOD2(UnexpectedAddressSize, void(uint64, uint8_t)); + MOCK_METHOD2(UnexpectedSegmentSize, void(uint64, uint8_t)); + MOCK_METHOD2(UnrecognizedVersion, void(uint64, int version)); + MOCK_METHOD2(UnrecognizedAugmentation, void(uint64, const string &)); + MOCK_METHOD2(InvalidPointerEncoding, void(uint64, uint8)); + MOCK_METHOD2(UnusablePointerEncoding, void(uint64, uint8)); + MOCK_METHOD2(RestoreInCIE, void(uint64, uint64)); + MOCK_METHOD3(BadInstruction, void(uint64, CallFrameInfo::EntryKind, uint64)); + MOCK_METHOD3(NoCFARule, void(uint64, CallFrameInfo::EntryKind, uint64)); + MOCK_METHOD3(EmptyStateStack, void(uint64, CallFrameInfo::EntryKind, uint64)); +}; + +struct CFIFixture { + + enum { kCFARegister = CallFrameInfo::Handler::kCFARegister }; + + CFIFixture() { + // Default expectations for the data handler. + // + // - Leave Entry and End without expectations, as it's probably a + // good idea to set those explicitly in each test. + // + // - Expect the *Rule functions to not be called, + // so that each test can simply list the calls they expect. + // + // I gather I could use StrictMock for this, but the manual seems + // to suggest using that only as a last resort, and this isn't so + // bad. + EXPECT_CALL(handler, UndefinedRule(_, _)).Times(0); + EXPECT_CALL(handler, SameValueRule(_, _)).Times(0); + EXPECT_CALL(handler, OffsetRule(_, _, _, _)).Times(0); + EXPECT_CALL(handler, ValOffsetRule(_, _, _, _)).Times(0); + EXPECT_CALL(handler, RegisterRule(_, _, _)).Times(0); + EXPECT_CALL(handler, ExpressionRule(_, _, _)).Times(0); + EXPECT_CALL(handler, ValExpressionRule(_, _, _)).Times(0); + EXPECT_CALL(handler, PersonalityRoutine(_, _)).Times(0); + EXPECT_CALL(handler, LanguageSpecificDataArea(_, _)).Times(0); + EXPECT_CALL(handler, SignalHandler()).Times(0); + + // Default expectations for the error/warning reporer. + EXPECT_CALL(reporter, Incomplete(_, _)).Times(0); + EXPECT_CALL(reporter, EarlyEHTerminator(_)).Times(0); + EXPECT_CALL(reporter, CIEPointerOutOfRange(_, _)).Times(0); + EXPECT_CALL(reporter, BadCIEId(_, _)).Times(0); + EXPECT_CALL(reporter, UnrecognizedVersion(_, _)).Times(0); + EXPECT_CALL(reporter, UnrecognizedAugmentation(_, _)).Times(0); + EXPECT_CALL(reporter, InvalidPointerEncoding(_, _)).Times(0); + EXPECT_CALL(reporter, UnusablePointerEncoding(_, _)).Times(0); + EXPECT_CALL(reporter, RestoreInCIE(_, _)).Times(0); + EXPECT_CALL(reporter, BadInstruction(_, _, _)).Times(0); + EXPECT_CALL(reporter, NoCFARule(_, _, _)).Times(0); + EXPECT_CALL(reporter, EmptyStateStack(_, _, _)).Times(0); + } + + MockCallFrameInfoHandler handler; + MockCallFrameErrorReporter reporter; +}; + +class CFI: public CFIFixture, public Test { }; + +TEST_F(CFI, EmptyRegion) { + EXPECT_CALL(handler, Entry(_, _, _, _, _, _)).Times(0); + EXPECT_CALL(handler, End()).Times(0); + static const uint8_t data[] = { 42 }; + + ByteReader byte_reader(ENDIANNESS_BIG); + CallFrameInfo parser(data, 0, &byte_reader, &handler, &reporter); + EXPECT_TRUE(parser.Start()); +} + +TEST_F(CFI, IncompleteLength32) { + CFISection section(kBigEndian, 8); + section + // Not even long enough for an initial length. + .D16(0xa0f) + // Padding to keep valgrind happy. We subtract these off when we + // construct the parser. + .D16(0); + + EXPECT_CALL(handler, Entry(_, _, _, _, _, _)).Times(0); + EXPECT_CALL(handler, End()).Times(0); + + EXPECT_CALL(reporter, Incomplete(_, CallFrameInfo::kUnknown)) + .WillOnce(Return()); + + string contents; + ASSERT_TRUE(section.GetContents(&contents)); + + ByteReader byte_reader(ENDIANNESS_BIG); + byte_reader.SetAddressSize(8); + CallFrameInfo parser(reinterpret_cast<const uint8_t *>(contents.data()), + contents.size() - 2, + &byte_reader, &handler, &reporter); + EXPECT_FALSE(parser.Start()); +} + +TEST_F(CFI, IncompleteLength64) { + CFISection section(kLittleEndian, 4); + section + // An incomplete 64-bit DWARF initial length. + .D32(0xffffffff).D32(0x71fbaec2) + // Padding to keep valgrind happy. We subtract these off when we + // construct the parser. + .D32(0); + + EXPECT_CALL(handler, Entry(_, _, _, _, _, _)).Times(0); + EXPECT_CALL(handler, End()).Times(0); + + EXPECT_CALL(reporter, Incomplete(_, CallFrameInfo::kUnknown)) + .WillOnce(Return()); + + string contents; + ASSERT_TRUE(section.GetContents(&contents)); + + ByteReader byte_reader(ENDIANNESS_LITTLE); + byte_reader.SetAddressSize(4); + CallFrameInfo parser(reinterpret_cast<const uint8_t *>(contents.data()), + contents.size() - 4, + &byte_reader, &handler, &reporter); + EXPECT_FALSE(parser.Start()); +} + +TEST_F(CFI, IncompleteId32) { + CFISection section(kBigEndian, 8); + section + .D32(3) // Initial length, not long enough for id + .D8(0xd7).D8(0xe5).D8(0xf1) // incomplete id + .CIEHeader(8727, 3983, 8889, 3, "") + .FinishEntry(); + + EXPECT_CALL(handler, Entry(_, _, _, _, _, _)).Times(0); + EXPECT_CALL(handler, End()).Times(0); + + EXPECT_CALL(reporter, Incomplete(_, CallFrameInfo::kUnknown)) + .WillOnce(Return()); + + string contents; + ASSERT_TRUE(section.GetContents(&contents)); + + ByteReader byte_reader(ENDIANNESS_BIG); + byte_reader.SetAddressSize(8); + CallFrameInfo parser(reinterpret_cast<const uint8_t *>(contents.data()), + contents.size(), + &byte_reader, &handler, &reporter); + EXPECT_FALSE(parser.Start()); +} + +TEST_F(CFI, BadId32) { + CFISection section(kBigEndian, 8); + section + .D32(0x100) // Initial length + .D32(0xe802fade) // bogus ID + .Append(0x100 - 4, 0x42); // make the length true + section + .CIEHeader(1672, 9872, 8529, 3, "") + .FinishEntry(); + + EXPECT_CALL(handler, Entry(_, _, _, _, _, _)).Times(0); + EXPECT_CALL(handler, End()).Times(0); + + EXPECT_CALL(reporter, CIEPointerOutOfRange(_, 0xe802fade)) + .WillOnce(Return()); + + string contents; + ASSERT_TRUE(section.GetContents(&contents)); + + ByteReader byte_reader(ENDIANNESS_BIG); + byte_reader.SetAddressSize(8); + CallFrameInfo parser(reinterpret_cast<const uint8_t *>(contents.data()), + contents.size(), + &byte_reader, &handler, &reporter); + EXPECT_FALSE(parser.Start()); +} + +// A lone CIE shouldn't cause any handler calls. +TEST_F(CFI, SingleCIE) { + CFISection section(kLittleEndian, 4); + section.CIEHeader(0xffe799a8, 0x3398dcdd, 0x6e9683de, 3, ""); + section.Append(10, dwarf2reader::DW_CFA_nop); + section.FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("SingleCIE", section); + + EXPECT_CALL(handler, Entry(_, _, _, _, _, _)).Times(0); + EXPECT_CALL(handler, End()).Times(0); + + string contents; + EXPECT_TRUE(section.GetContents(&contents)); + ByteReader byte_reader(ENDIANNESS_LITTLE); + byte_reader.SetAddressSize(4); + CallFrameInfo parser(reinterpret_cast<const uint8_t *>(contents.data()), + contents.size(), + &byte_reader, &handler, &reporter); + EXPECT_TRUE(parser.Start()); +} + +// One FDE, one CIE. +TEST_F(CFI, OneFDE) { + CFISection section(kBigEndian, 4); + Label cie; + section + .Mark(&cie) + .CIEHeader(0x4be22f75, 0x2492236e, 0x6b6efb87, 3, "") + .FinishEntry() + .FDEHeader(cie, 0x7714740d, 0x3d5a10cd) + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("OneFDE", section); + + { + InSequence s; + EXPECT_CALL(handler, + Entry(_, 0x7714740d, 0x3d5a10cd, 3, "", 0x6b6efb87)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + } + + string contents; + EXPECT_TRUE(section.GetContents(&contents)); + ByteReader byte_reader(ENDIANNESS_BIG); + byte_reader.SetAddressSize(4); + CallFrameInfo parser(reinterpret_cast<const uint8_t *>(contents.data()), + contents.size(), + &byte_reader, &handler, &reporter); + EXPECT_TRUE(parser.Start()); +} + +// Two FDEs share a CIE. +TEST_F(CFI, TwoFDEsOneCIE) { + CFISection section(kBigEndian, 4); + Label cie; + section + // First FDE. readelf complains about this one because it makes + // a forward reference to its CIE. + .FDEHeader(cie, 0xa42744df, 0xa3b42121) + .FinishEntry() + // CIE. + .Mark(&cie) + .CIEHeader(0x04f7dc7b, 0x3d00c05f, 0xbd43cb59, 3, "") + .FinishEntry() + // Second FDE. + .FDEHeader(cie, 0x6057d391, 0x700f608d) + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("TwoFDEsOneCIE", section); + + { + InSequence s; + EXPECT_CALL(handler, + Entry(_, 0xa42744df, 0xa3b42121, 3, "", 0xbd43cb59)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + } + { + InSequence s; + EXPECT_CALL(handler, + Entry(_, 0x6057d391, 0x700f608d, 3, "", 0xbd43cb59)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + } + + string contents; + EXPECT_TRUE(section.GetContents(&contents)); + ByteReader byte_reader(ENDIANNESS_BIG); + byte_reader.SetAddressSize(4); + CallFrameInfo parser(reinterpret_cast<const uint8_t *>(contents.data()), + contents.size(), + &byte_reader, &handler, &reporter); + EXPECT_TRUE(parser.Start()); +} + +// Two FDEs, two CIEs. +TEST_F(CFI, TwoFDEsTwoCIEs) { + CFISection section(kLittleEndian, 8); + Label cie1, cie2; + section + // First CIE. + .Mark(&cie1) + .CIEHeader(0x694d5d45, 0x4233221b, 0xbf45e65a, 3, "") + .FinishEntry() + // First FDE which cites second CIE. readelf complains about + // this one because it makes a forward reference to its CIE. + .FDEHeader(cie2, 0x778b27dfe5871f05ULL, 0x324ace3448070926ULL) + .FinishEntry() + // Second FDE, which cites first CIE. + .FDEHeader(cie1, 0xf6054ca18b10bf5fULL, 0x45fdb970d8bca342ULL) + .FinishEntry() + // Second CIE. + .Mark(&cie2) + .CIEHeader(0xfba3fad7, 0x6287e1fd, 0x61d2c581, 2, "") + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("TwoFDEsTwoCIEs", section); + + { + InSequence s; + EXPECT_CALL(handler, + Entry(_, 0x778b27dfe5871f05ULL, 0x324ace3448070926ULL, 2, + "", 0x61d2c581)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + } + { + InSequence s; + EXPECT_CALL(handler, + Entry(_, 0xf6054ca18b10bf5fULL, 0x45fdb970d8bca342ULL, 3, + "", 0xbf45e65a)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + } + + string contents; + EXPECT_TRUE(section.GetContents(&contents)); + ByteReader byte_reader(ENDIANNESS_LITTLE); + byte_reader.SetAddressSize(8); + CallFrameInfo parser(reinterpret_cast<const uint8_t *>(contents.data()), + contents.size(), + &byte_reader, &handler, &reporter); + EXPECT_TRUE(parser.Start()); +} + +// An FDE whose CIE specifies a version we don't recognize. +TEST_F(CFI, BadVersion) { + CFISection section(kBigEndian, 4); + Label cie1, cie2; + section + .Mark(&cie1) + .CIEHeader(0xca878cf0, 0x7698ec04, 0x7b616f54, 0x52, "") + .FinishEntry() + // We should skip this entry, as its CIE specifies a version we + // don't recognize. + .FDEHeader(cie1, 0x08852292, 0x2204004a) + .FinishEntry() + // Despite the above, we should visit this entry. + .Mark(&cie2) + .CIEHeader(0x7c3ae7c9, 0xb9b9a512, 0x96cb3264, 3, "") + .FinishEntry() + .FDEHeader(cie2, 0x2094735a, 0x6e875501) + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("BadVersion", section); + + EXPECT_CALL(reporter, UnrecognizedVersion(_, 0x52)) + .WillOnce(Return()); + + { + InSequence s; + // We should see no mention of the first FDE, but we should get + // a call to Entry for the second. + EXPECT_CALL(handler, Entry(_, 0x2094735a, 0x6e875501, 3, "", + 0x96cb3264)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()) + .WillOnce(Return(true)); + } + + string contents; + EXPECT_TRUE(section.GetContents(&contents)); + ByteReader byte_reader(ENDIANNESS_BIG); + byte_reader.SetAddressSize(4); + CallFrameInfo parser(reinterpret_cast<const uint8_t *>(contents.data()), + contents.size(), + &byte_reader, &handler, &reporter); + EXPECT_FALSE(parser.Start()); +} + +// An FDE whose CIE specifies an augmentation we don't recognize. +TEST_F(CFI, BadAugmentation) { + CFISection section(kBigEndian, 4); + Label cie1, cie2; + section + .Mark(&cie1) + .CIEHeader(0x4be22f75, 0x2492236e, 0x6b6efb87, 3, "spaniels!") + .FinishEntry() + // We should skip this entry, as its CIE specifies an + // augmentation we don't recognize. + .FDEHeader(cie1, 0x7714740d, 0x3d5a10cd) + .FinishEntry() + // Despite the above, we should visit this entry. + .Mark(&cie2) + .CIEHeader(0xf8bc4399, 0x8cf09931, 0xf2f519b2, 3, "") + .FinishEntry() + .FDEHeader(cie2, 0x7bf0fda0, 0xcbcd28d8) + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("BadAugmentation", section); + + EXPECT_CALL(reporter, UnrecognizedAugmentation(_, "spaniels!")) + .WillOnce(Return()); + + { + InSequence s; + // We should see no mention of the first FDE, but we should get + // a call to Entry for the second. + EXPECT_CALL(handler, Entry(_, 0x7bf0fda0, 0xcbcd28d8, 3, "", + 0xf2f519b2)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()) + .WillOnce(Return(true)); + } + + string contents; + EXPECT_TRUE(section.GetContents(&contents)); + ByteReader byte_reader(ENDIANNESS_BIG); + byte_reader.SetAddressSize(4); + CallFrameInfo parser(reinterpret_cast<const uint8_t *>(contents.data()), + contents.size(), + &byte_reader, &handler, &reporter); + EXPECT_FALSE(parser.Start()); +} + +// The return address column field is a byte in CFI version 1 +// (DWARF2), but a ULEB128 value in version 3 (DWARF3). +TEST_F(CFI, CIEVersion1ReturnColumn) { + CFISection section(kBigEndian, 4); + Label cie; + section + // CIE, using the version 1 format: return column is a ubyte. + .Mark(&cie) + // Use a value for the return column that is parsed differently + // as a ubyte and as a ULEB128. + .CIEHeader(0xbcdea24f, 0x5be28286, 0x9f, 1, "") + .FinishEntry() + // FDE, citing that CIE. + .FDEHeader(cie, 0xb8d347b5, 0x825e55dc) + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("CIEVersion1ReturnColumn", section); + + { + InSequence s; + EXPECT_CALL(handler, Entry(_, 0xb8d347b5, 0x825e55dc, 1, "", 0x9f)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + } + + string contents; + EXPECT_TRUE(section.GetContents(&contents)); + ByteReader byte_reader(ENDIANNESS_BIG); + byte_reader.SetAddressSize(4); + CallFrameInfo parser(reinterpret_cast<const uint8_t *>(contents.data()), + contents.size(), + &byte_reader, &handler, &reporter); + EXPECT_TRUE(parser.Start()); +} + +// The return address column field is a byte in CFI version 1 +// (DWARF2), but a ULEB128 value in version 3 (DWARF3). +TEST_F(CFI, CIEVersion3ReturnColumn) { + CFISection section(kBigEndian, 4); + Label cie; + section + // CIE, using the version 3 format: return column is a ULEB128. + .Mark(&cie) + // Use a value for the return column that is parsed differently + // as a ubyte and as a ULEB128. + .CIEHeader(0x0ab4758d, 0xc010fdf7, 0x89, 3, "") + .FinishEntry() + // FDE, citing that CIE. + .FDEHeader(cie, 0x86763f2b, 0x2a66dc23) + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("CIEVersion3ReturnColumn", section); + + { + InSequence s; + EXPECT_CALL(handler, Entry(_, 0x86763f2b, 0x2a66dc23, 3, "", 0x89)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + } + + string contents; + EXPECT_TRUE(section.GetContents(&contents)); + ByteReader byte_reader(ENDIANNESS_BIG); + byte_reader.SetAddressSize(4); + CallFrameInfo parser(reinterpret_cast<const uint8_t *>(contents.data()), + contents.size(), + &byte_reader, &handler, &reporter); + EXPECT_TRUE(parser.Start()); +} + +TEST_F(CFI, CIEVersion4AdditionalFields) { + CFISection section(kBigEndian, 4); + Label cie; + section + .Mark(&cie) + // CIE version 4 with expected address and segment size. + .CIEHeader(0x0ab4758d, 0xc010fdf7, 0x89, 4, "", true, 8, 0) + .FinishEntry() + // FDE, citing that CIE. + .FDEHeader(cie, 0x86763f2b, 0x2a66dc23) + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("CIEVersion3ReturnColumn", section); + + { + InSequence s; + EXPECT_CALL(handler, Entry(_, 0x86763f2b, 0x2a66dc23, 4, "", 0x89)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + } + + string contents; + EXPECT_TRUE(section.GetContents(&contents)); + ByteReader byte_reader(ENDIANNESS_BIG); + byte_reader.SetAddressSize(4); + CallFrameInfo parser(reinterpret_cast<const uint8_t *>(contents.data()), + contents.size(), + &byte_reader, &handler, &reporter); + EXPECT_TRUE(parser.Start()); +} + +TEST_F(CFI, CIEVersion4AdditionalFieldsUnexpectedAddressSize) { + CFISection section(kBigEndian, 4); + Label cie; + + section + .Mark(&cie) + // Unexpected address size. + .CIEHeader(0x4be22f75, 0x2492236e, 0x6b6efb87, 4, "", true, 3, 0) + .FinishEntry() + // FDE, citing that CIE. + .FDEHeader(cie, 0x86763f2b, 0x2a66dc23) + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("AdditionalFieldsUnexpectedAddress", section); + + EXPECT_CALL(reporter, UnexpectedAddressSize(_, 3)) + .WillOnce(Return()); + + string contents; + EXPECT_TRUE(section.GetContents(&contents)); + ByteReader byte_reader(ENDIANNESS_BIG); + byte_reader.SetAddressSize(8); + CallFrameInfo parser(reinterpret_cast<const uint8_t *>(contents.data()), + contents.size(), + &byte_reader, &handler, &reporter); + EXPECT_FALSE(parser.Start()); +} + +TEST_F(CFI, CIEVersion4AdditionalFieldsUnexpectedSegmentSize) { + CFISection section(kBigEndian, 4); + Label cie; + + section + .Mark(&cie) + .CIEHeader(0xf8bc4399, 0x8cf09931, 0xf2f519b2, 4, "", true, 8, 7) + .FinishEntry() + .FDEHeader(cie, 0x7bf0fda0, 0xcbcd28d8) + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("AdditionalFieldsUnexpectedSegment", section); + + EXPECT_CALL(reporter, UnexpectedSegmentSize(_, 7)) + .WillOnce(Return()); + + string contents; + EXPECT_TRUE(section.GetContents(&contents)); + ByteReader byte_reader(ENDIANNESS_BIG); + byte_reader.SetAddressSize(8); + CallFrameInfo parser(reinterpret_cast<const uint8_t *>(contents.data()), + contents.size(), + &byte_reader, &handler, &reporter); + EXPECT_FALSE(parser.Start()); +} + +struct CFIInsnFixture: public CFIFixture { + CFIInsnFixture() : CFIFixture() { + data_factor = 0xb6f; + return_register = 0x9be1ed9f; + version = 3; + cfa_base_register = 0x383a3aa; + cfa_offset = 0xf748; + } + + // Prepare SECTION to receive FDE instructions. + // + // - Append a stock CIE header that establishes the fixture's + // code_factor, data_factor, return_register, version, and + // augmentation values. + // - Have the CIE set up a CFA rule using cfa_base_register and + // cfa_offset. + // - Append a stock FDE header, referring to the above CIE, for the + // fde_size bytes at fde_start. Choose fde_start and fde_size + // appropriately for the section's address size. + // - Set appropriate expectations on handler in sequence s for the + // frame description entry and the CIE's CFA rule. + // + // On return, SECTION is ready to have FDE instructions appended to + // it, and its FinishEntry member called. + void StockCIEAndFDE(CFISection *section) { + // Choose appropriate constants for our address size. + if (section->AddressSize() == 4) { + fde_start = 0xc628ecfbU; + fde_size = 0x5dee04a2; + code_factor = 0x60b; + } else { + assert(section->AddressSize() == 8); + fde_start = 0x0005c57ce7806bd3ULL; + fde_size = 0x2699521b5e333100ULL; + code_factor = 0x01008e32855274a8ULL; + } + + // Create the CIE. + (*section) + .Mark(&cie_label) + .CIEHeader(code_factor, data_factor, return_register, version, + "") + .D8(dwarf2reader::DW_CFA_def_cfa) + .ULEB128(cfa_base_register) + .ULEB128(cfa_offset) + .FinishEntry(); + + // Create the FDE. + section->FDEHeader(cie_label, fde_start, fde_size); + + // Expect an Entry call for the FDE and a ValOffsetRule call for the + // CIE's CFA rule. + EXPECT_CALL(handler, Entry(_, fde_start, fde_size, version, "", + return_register)) + .InSequence(s) + .WillOnce(Return(true)); + EXPECT_CALL(handler, ValOffsetRule(fde_start, kCFARegister, + cfa_base_register, cfa_offset)) + .InSequence(s) + .WillOnce(Return(true)); + } + + // Run the contents of SECTION through a CallFrameInfo parser, + // expecting parser.Start to return SUCCEEDS + void ParseSection(CFISection *section, bool succeeds = true) { + string contents; + EXPECT_TRUE(section->GetContents(&contents)); + dwarf2reader::Endianness endianness; + if (section->endianness() == kBigEndian) + endianness = ENDIANNESS_BIG; + else { + assert(section->endianness() == kLittleEndian); + endianness = ENDIANNESS_LITTLE; + } + ByteReader byte_reader(endianness); + byte_reader.SetAddressSize(section->AddressSize()); + CallFrameInfo parser(reinterpret_cast<const uint8_t *>(contents.data()), + contents.size(), + &byte_reader, &handler, &reporter); + if (succeeds) + EXPECT_TRUE(parser.Start()); + else + EXPECT_FALSE(parser.Start()); + } + + Label cie_label; + Sequence s; + uint64 code_factor; + int data_factor; + unsigned return_register; + unsigned version; + unsigned cfa_base_register; + int cfa_offset; + uint64 fde_start, fde_size; +}; + +class CFIInsn: public CFIInsnFixture, public Test { }; + +TEST_F(CFIInsn, DW_CFA_set_loc) { + CFISection section(kBigEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_set_loc).D32(0xb1ee3e7a) + // Use DW_CFA_def_cfa to force a handler call that we can use to + // check the effect of the DW_CFA_set_loc. + .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x4defb431).ULEB128(0x6d17b0ee) + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("DW_CFA_set_loc", section); + + EXPECT_CALL(handler, + ValOffsetRule(0xb1ee3e7a, kCFARegister, 0x4defb431, 0x6d17b0ee)) + .InSequence(s) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_advance_loc) { + CFISection section(kBigEndian, 8); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_advance_loc | 0x2a) + // Use DW_CFA_def_cfa to force a handler call that we can use to + // check the effect of the DW_CFA_advance_loc. + .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x5bbb3715).ULEB128(0x0186c7bf) + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("DW_CFA_advance_loc", section); + + EXPECT_CALL(handler, + ValOffsetRule(fde_start + 0x2a * code_factor, + kCFARegister, 0x5bbb3715, 0x0186c7bf)) + .InSequence(s) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_advance_loc1) { + CFISection section(kLittleEndian, 8); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_advance_loc1).D8(0xd8) + .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x69d5696a).ULEB128(0x1eb7fc93) + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("DW_CFA_advance_loc1", section); + + EXPECT_CALL(handler, + ValOffsetRule((fde_start + 0xd8 * code_factor), + kCFARegister, 0x69d5696a, 0x1eb7fc93)) + .InSequence(s) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_advance_loc2) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_advance_loc2).D16(0x3adb) + .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x3a368bed).ULEB128(0x3194ee37) + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("DW_CFA_advance_loc2", section); + + EXPECT_CALL(handler, + ValOffsetRule((fde_start + 0x3adb * code_factor), + kCFARegister, 0x3a368bed, 0x3194ee37)) + .InSequence(s) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_advance_loc4) { + CFISection section(kBigEndian, 8); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_advance_loc4).D32(0x15813c88) + .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x135270c5).ULEB128(0x24bad7cb) + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("DW_CFA_advance_loc4", section); + + EXPECT_CALL(handler, + ValOffsetRule((fde_start + 0x15813c88ULL * code_factor), + kCFARegister, 0x135270c5, 0x24bad7cb)) + .InSequence(s) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_MIPS_advance_loc8) { + code_factor = 0x2d; + CFISection section(kBigEndian, 8); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_MIPS_advance_loc8).D64(0x3c4f3945b92c14ULL) + .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0xe17ed602).ULEB128(0x3d162e7f) + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("DW_CFA_advance_loc8", section); + + EXPECT_CALL(handler, + ValOffsetRule((fde_start + 0x3c4f3945b92c14ULL * code_factor), + kCFARegister, 0xe17ed602, 0x3d162e7f)) + .InSequence(s) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_def_cfa) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x4e363a85).ULEB128(0x815f9aa7) + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("DW_CFA_def_cfa", section); + + EXPECT_CALL(handler, + ValOffsetRule(fde_start, kCFARegister, 0x4e363a85, 0x815f9aa7)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_def_cfa_sf) { + CFISection section(kBigEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_def_cfa_sf).ULEB128(0x8ccb32b7).LEB128(0x9ea) + .D8(dwarf2reader::DW_CFA_def_cfa_sf).ULEB128(0x9b40f5da).LEB128(-0x40a2) + .FinishEntry(); + + EXPECT_CALL(handler, + ValOffsetRule(fde_start, kCFARegister, 0x8ccb32b7, + 0x9ea * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, + ValOffsetRule(fde_start, kCFARegister, 0x9b40f5da, + -0x40a2 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_def_cfa_register) { + CFISection section(kLittleEndian, 8); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_def_cfa_register).ULEB128(0x3e7e9363) + .FinishEntry(); + + EXPECT_CALL(handler, + ValOffsetRule(fde_start, kCFARegister, 0x3e7e9363, cfa_offset)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +// DW_CFA_def_cfa_register should have no effect when applied to a +// non-base/offset rule. +TEST_F(CFIInsn, DW_CFA_def_cfa_registerBadRule) { + CFISection section(kBigEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_def_cfa_expression).Block("needle in a haystack") + .D8(dwarf2reader::DW_CFA_def_cfa_register).ULEB128(0xf1b49e49) + .FinishEntry(); + + EXPECT_CALL(handler, + ValExpressionRule(fde_start, kCFARegister, + "needle in a haystack")) + .WillRepeatedly(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_def_cfa_offset) { + CFISection section(kBigEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_def_cfa_offset).ULEB128(0x1e8e3b9b) + .FinishEntry(); + + EXPECT_CALL(handler, + ValOffsetRule(fde_start, kCFARegister, cfa_base_register, + 0x1e8e3b9b)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_def_cfa_offset_sf) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_def_cfa_offset_sf).LEB128(0x970) + .D8(dwarf2reader::DW_CFA_def_cfa_offset_sf).LEB128(-0x2cd) + .FinishEntry(); + + EXPECT_CALL(handler, + ValOffsetRule(fde_start, kCFARegister, cfa_base_register, + 0x970 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, + ValOffsetRule(fde_start, kCFARegister, cfa_base_register, + -0x2cd * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +// DW_CFA_def_cfa_offset should have no effect when applied to a +// non-base/offset rule. +TEST_F(CFIInsn, DW_CFA_def_cfa_offsetBadRule) { + CFISection section(kBigEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_def_cfa_expression).Block("six ways to Sunday") + .D8(dwarf2reader::DW_CFA_def_cfa_offset).ULEB128(0x1e8e3b9b) + .FinishEntry(); + + EXPECT_CALL(handler, + ValExpressionRule(fde_start, kCFARegister, "six ways to Sunday")) + .WillRepeatedly(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_def_cfa_expression) { + CFISection section(kLittleEndian, 8); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_def_cfa_expression).Block("eating crow") + .FinishEntry(); + + EXPECT_CALL(handler, ValExpressionRule(fde_start, kCFARegister, + "eating crow")) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_undefined) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0x300ce45d) + .FinishEntry(); + + EXPECT_CALL(handler, UndefinedRule(fde_start, 0x300ce45d)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_same_value) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_same_value).ULEB128(0x3865a760) + .FinishEntry(); + + EXPECT_CALL(handler, SameValueRule(fde_start, 0x3865a760)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_offset) { + CFISection section(kBigEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_offset | 0x2c).ULEB128(0x9f6) + .FinishEntry(); + + EXPECT_CALL(handler, + OffsetRule(fde_start, 0x2c, kCFARegister, 0x9f6 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_offset_extended) { + CFISection section(kBigEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_offset_extended).ULEB128(0x402b).ULEB128(0xb48) + .FinishEntry(); + + EXPECT_CALL(handler, + OffsetRule(fde_start, 0x402b, kCFARegister, 0xb48 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_offset_extended_sf) { + CFISection section(kBigEndian, 8); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_offset_extended_sf) + .ULEB128(0x997c23ee).LEB128(0x2d00) + .D8(dwarf2reader::DW_CFA_offset_extended_sf) + .ULEB128(0x9519eb82).LEB128(-0xa77) + .FinishEntry(); + + EXPECT_CALL(handler, + OffsetRule(fde_start, 0x997c23ee, + kCFARegister, 0x2d00 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, + OffsetRule(fde_start, 0x9519eb82, + kCFARegister, -0xa77 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_val_offset) { + CFISection section(kBigEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_val_offset).ULEB128(0x623562fe).ULEB128(0x673) + .FinishEntry(); + + EXPECT_CALL(handler, + ValOffsetRule(fde_start, 0x623562fe, + kCFARegister, 0x673 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_val_offset_sf) { + CFISection section(kBigEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_val_offset_sf).ULEB128(0x6f4f).LEB128(0xaab) + .D8(dwarf2reader::DW_CFA_val_offset_sf).ULEB128(0x2483).LEB128(-0x8a2) + .FinishEntry(); + + EXPECT_CALL(handler, + ValOffsetRule(fde_start, 0x6f4f, + kCFARegister, 0xaab * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, + ValOffsetRule(fde_start, 0x2483, + kCFARegister, -0x8a2 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_register) { + CFISection section(kLittleEndian, 8); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_register).ULEB128(0x278d18f9).ULEB128(0x1a684414) + .FinishEntry(); + + EXPECT_CALL(handler, RegisterRule(fde_start, 0x278d18f9, 0x1a684414)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_expression) { + CFISection section(kBigEndian, 8); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_expression).ULEB128(0xa1619fb2) + .Block("plus ça change, plus c'est la même chose") + .FinishEntry(); + + EXPECT_CALL(handler, + ExpressionRule(fde_start, 0xa1619fb2, + "plus ça change, plus c'est la même chose")) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_val_expression) { + CFISection section(kBigEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_val_expression).ULEB128(0xc5e4a9e3) + .Block("he who has the gold makes the rules") + .FinishEntry(); + + EXPECT_CALL(handler, + ValExpressionRule(fde_start, 0xc5e4a9e3, + "he who has the gold makes the rules")) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_restore) { + CFISection section(kLittleEndian, 8); + code_factor = 0x01bd188a9b1fa083ULL; + data_factor = -0x1ac8; + return_register = 0x8c35b049; + version = 2; + fde_start = 0x2d70fe998298bbb1ULL; + fde_size = 0x46ccc2e63cf0b108ULL; + Label cie; + section + .Mark(&cie) + .CIEHeader(code_factor, data_factor, return_register, version, + "") + // Provide a CFA rule, because register rules require them. + .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x6ca1d50e).ULEB128(0x372e38e8) + // Provide an offset(N) rule for register 0x3c. + .D8(dwarf2reader::DW_CFA_offset | 0x3c).ULEB128(0xb348) + .FinishEntry() + // In the FDE... + .FDEHeader(cie, fde_start, fde_size) + // At a second address, provide a new offset(N) rule for register 0x3c. + .D8(dwarf2reader::DW_CFA_advance_loc | 0x13) + .D8(dwarf2reader::DW_CFA_offset | 0x3c).ULEB128(0x9a50) + // At a third address, restore the original rule for register 0x3c. + .D8(dwarf2reader::DW_CFA_advance_loc | 0x01) + .D8(dwarf2reader::DW_CFA_restore | 0x3c) + .FinishEntry(); + + { + InSequence s; + EXPECT_CALL(handler, + Entry(_, fde_start, fde_size, version, "", return_register)) + .WillOnce(Return(true)); + // CIE's CFA rule. + EXPECT_CALL(handler, + ValOffsetRule(fde_start, kCFARegister, 0x6ca1d50e, 0x372e38e8)) + .WillOnce(Return(true)); + // CIE's rule for register 0x3c. + EXPECT_CALL(handler, + OffsetRule(fde_start, 0x3c, kCFARegister, 0xb348 * data_factor)) + .WillOnce(Return(true)); + // FDE's rule for register 0x3c. + EXPECT_CALL(handler, + OffsetRule(fde_start + 0x13 * code_factor, 0x3c, + kCFARegister, 0x9a50 * data_factor)) + .WillOnce(Return(true)); + // Restore CIE's rule for register 0x3c. + EXPECT_CALL(handler, + OffsetRule(fde_start + (0x13 + 0x01) * code_factor, 0x3c, + kCFARegister, 0xb348 * data_factor)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + } + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_restoreNoRule) { + CFISection section(kBigEndian, 4); + code_factor = 0x005f78143c1c3b82ULL; + data_factor = 0x25d0; + return_register = 0xe8; + version = 1; + fde_start = 0x4062e30f; + fde_size = 0x5302a389; + Label cie; + section + .Mark(&cie) + .CIEHeader(code_factor, data_factor, return_register, version, "") + // Provide a CFA rule, because register rules require them. + .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x470aa334).ULEB128(0x099ef127) + .FinishEntry() + // In the FDE... + .FDEHeader(cie, fde_start, fde_size) + // At a second address, provide an offset(N) rule for register 0x2c. + .D8(dwarf2reader::DW_CFA_advance_loc | 0x7) + .D8(dwarf2reader::DW_CFA_offset | 0x2c).ULEB128(0x1f47) + // At a third address, restore the (missing) CIE rule for register 0x2c. + .D8(dwarf2reader::DW_CFA_advance_loc | 0xb) + .D8(dwarf2reader::DW_CFA_restore | 0x2c) + .FinishEntry(); + + { + InSequence s; + EXPECT_CALL(handler, + Entry(_, fde_start, fde_size, version, "", return_register)) + .WillOnce(Return(true)); + // CIE's CFA rule. + EXPECT_CALL(handler, + ValOffsetRule(fde_start, kCFARegister, 0x470aa334, 0x099ef127)) + .WillOnce(Return(true)); + // FDE's rule for register 0x2c. + EXPECT_CALL(handler, + OffsetRule(fde_start + 0x7 * code_factor, 0x2c, + kCFARegister, 0x1f47 * data_factor)) + .WillOnce(Return(true)); + // Restore CIE's (missing) rule for register 0x2c. + EXPECT_CALL(handler, + SameValueRule(fde_start + (0x7 + 0xb) * code_factor, 0x2c)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + } + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_restore_extended) { + CFISection section(kBigEndian, 4); + code_factor = 0x126e; + data_factor = -0xd8b; + return_register = 0x77711787; + version = 3; + fde_start = 0x01f55a45; + fde_size = 0x452adb80; + Label cie; + section + .Mark(&cie) + .CIEHeader(code_factor, data_factor, return_register, version, + "", true /* dwarf64 */ ) + // Provide a CFA rule, because register rules require them. + .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x56fa0edd).ULEB128(0x097f78a5) + // Provide an offset(N) rule for register 0x0f9b8a1c. + .D8(dwarf2reader::DW_CFA_offset_extended) + .ULEB128(0x0f9b8a1c).ULEB128(0xc979) + .FinishEntry() + // In the FDE... + .FDEHeader(cie, fde_start, fde_size) + // At a second address, provide a new offset(N) rule for reg 0x0f9b8a1c. + .D8(dwarf2reader::DW_CFA_advance_loc | 0x3) + .D8(dwarf2reader::DW_CFA_offset_extended) + .ULEB128(0x0f9b8a1c).ULEB128(0x3b7b) + // At a third address, restore the original rule for register 0x0f9b8a1c. + .D8(dwarf2reader::DW_CFA_advance_loc | 0x04) + .D8(dwarf2reader::DW_CFA_restore_extended).ULEB128(0x0f9b8a1c) + .FinishEntry(); + + { + InSequence s; + EXPECT_CALL(handler, + Entry(_, fde_start, fde_size, version, "", return_register)) + .WillOnce(Return(true)); + // CIE's CFA rule. + EXPECT_CALL(handler, + ValOffsetRule(fde_start, kCFARegister, 0x56fa0edd, 0x097f78a5)) + .WillOnce(Return(true)); + // CIE's rule for register 0x0f9b8a1c. + EXPECT_CALL(handler, + OffsetRule(fde_start, 0x0f9b8a1c, kCFARegister, + 0xc979 * data_factor)) + .WillOnce(Return(true)); + // FDE's rule for register 0x0f9b8a1c. + EXPECT_CALL(handler, + OffsetRule(fde_start + 0x3 * code_factor, 0x0f9b8a1c, + kCFARegister, 0x3b7b * data_factor)) + .WillOnce(Return(true)); + // Restore CIE's rule for register 0x0f9b8a1c. + EXPECT_CALL(handler, + OffsetRule(fde_start + (0x3 + 0x4) * code_factor, 0x0f9b8a1c, + kCFARegister, 0xc979 * data_factor)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + } + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_remember_and_restore_state) { + CFISection section(kLittleEndian, 8); + StockCIEAndFDE(§ion); + + // We create a state, save it, modify it, and then restore. We + // refer to the state that is overridden the restore as the + // "outgoing" state, and the restored state the "incoming" state. + // + // Register outgoing incoming expect + // 1 offset(N) no rule new "same value" rule + // 2 register(R) offset(N) report changed rule + // 3 offset(N) offset(M) report changed offset + // 4 offset(N) offset(N) no report + // 5 offset(N) no rule new "same value" rule + section + // Create the "incoming" state, which we will save and later restore. + .D8(dwarf2reader::DW_CFA_offset | 2).ULEB128(0x9806) + .D8(dwarf2reader::DW_CFA_offset | 3).ULEB128(0x995d) + .D8(dwarf2reader::DW_CFA_offset | 4).ULEB128(0x7055) + .D8(dwarf2reader::DW_CFA_remember_state) + // Advance to a new instruction; an implementation could legitimately + // ignore all but the final rule for a given register at a given address. + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + // Create the "outgoing" state, which we will discard. + .D8(dwarf2reader::DW_CFA_offset | 1).ULEB128(0xea1a) + .D8(dwarf2reader::DW_CFA_register).ULEB128(2).ULEB128(0x1d2a3767) + .D8(dwarf2reader::DW_CFA_offset | 3).ULEB128(0xdd29) + .D8(dwarf2reader::DW_CFA_offset | 5).ULEB128(0xf1ce) + // At a third address, restore the incoming state. + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + uint64 addr = fde_start; + + // Expect the incoming rules to be reported. + EXPECT_CALL(handler, OffsetRule(addr, 2, kCFARegister, 0x9806 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, OffsetRule(addr, 3, kCFARegister, 0x995d * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, OffsetRule(addr, 4, kCFARegister, 0x7055 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + + addr += code_factor; + + // After the save, we establish the outgoing rule set. + EXPECT_CALL(handler, OffsetRule(addr, 1, kCFARegister, 0xea1a * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, RegisterRule(addr, 2, 0x1d2a3767)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, OffsetRule(addr, 3, kCFARegister, 0xdd29 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, OffsetRule(addr, 5, kCFARegister, 0xf1ce * data_factor)) + .InSequence(s).WillOnce(Return(true)); + + addr += code_factor; + + // Finally, after the restore, expect to see the differences from + // the outgoing to the incoming rules reported. + EXPECT_CALL(handler, SameValueRule(addr, 1)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, OffsetRule(addr, 2, kCFARegister, 0x9806 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, OffsetRule(addr, 3, kCFARegister, 0x995d * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, SameValueRule(addr, 5)) + .InSequence(s).WillOnce(Return(true)); + + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +// Check that restoring a rule set reports changes to the CFA rule. +TEST_F(CFIInsn, DW_CFA_remember_and_restore_stateCFA) { + CFISection section(kBigEndian, 4); + StockCIEAndFDE(§ion); + + section + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_def_cfa_offset).ULEB128(0x90481102) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + EXPECT_CALL(handler, ValOffsetRule(fde_start + code_factor, kCFARegister, + cfa_base_register, 0x90481102)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, ValOffsetRule(fde_start + code_factor * 2, kCFARegister, + cfa_base_register, cfa_offset)) + .InSequence(s).WillOnce(Return(true)); + + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_nop) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_nop) + .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x3fb8d4f1).ULEB128(0x078dc67b) + .D8(dwarf2reader::DW_CFA_nop) + .FinishEntry(); + + EXPECT_CALL(handler, + ValOffsetRule(fde_start, kCFARegister, 0x3fb8d4f1, 0x078dc67b)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_GNU_window_save) { + CFISection section(kBigEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_GNU_window_save) + .FinishEntry(); + + // Don't include all the rules in any particular sequence. + + // The caller's %o0-%o7 have become the callee's %i0-%i7. This is + // the GCC register numbering. + for (int i = 8; i < 16; i++) + EXPECT_CALL(handler, RegisterRule(fde_start, i, i + 16)) + .WillOnce(Return(true)); + // The caller's %l0-%l7 and %i0-%i7 have been saved at the top of + // its frame. + for (int i = 16; i < 32; i++) + EXPECT_CALL(handler, OffsetRule(fde_start, i, kCFARegister, (i-16) * 4)) + .WillOnce(Return(true)); + + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_GNU_args_size) { + CFISection section(kLittleEndian, 8); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_GNU_args_size).ULEB128(0xeddfa520) + // Verify that we see this, meaning we parsed the above properly. + .D8(dwarf2reader::DW_CFA_offset | 0x23).ULEB128(0x269) + .FinishEntry(); + + EXPECT_CALL(handler, + OffsetRule(fde_start, 0x23, kCFARegister, 0x269 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIInsn, DW_CFA_GNU_negative_offset_extended) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_GNU_negative_offset_extended) + .ULEB128(0x430cc87a).ULEB128(0x613) + .FinishEntry(); + + EXPECT_CALL(handler, + OffsetRule(fde_start, 0x430cc87a, + kCFARegister, -0x613 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion); +} + +// Three FDEs: skip the second +TEST_F(CFIInsn, SkipFDE) { + CFISection section(kBigEndian, 4); + Label cie; + section + // CIE, used by all FDEs. + .Mark(&cie) + .CIEHeader(0x010269f2, 0x9177, 0xedca5849, 2, "") + .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(0x42ed390b).ULEB128(0x98f43aad) + .FinishEntry() + // First FDE. + .FDEHeader(cie, 0xa870ebdd, 0x60f6aa4) + .D8(dwarf2reader::DW_CFA_register).ULEB128(0x3a860351).ULEB128(0x6c9a6bcf) + .FinishEntry() + // Second FDE. + .FDEHeader(cie, 0xc534f7c0, 0xf6552e9, true /* dwarf64 */) + .D8(dwarf2reader::DW_CFA_register).ULEB128(0x1b62c234).ULEB128(0x26586b18) + .FinishEntry() + // Third FDE. + .FDEHeader(cie, 0xf681cfc8, 0x7e4594e) + .D8(dwarf2reader::DW_CFA_register).ULEB128(0x26c53934).ULEB128(0x18eeb8a4) + .FinishEntry(); + + { + InSequence s; + + // Process the first FDE. + EXPECT_CALL(handler, Entry(_, 0xa870ebdd, 0x60f6aa4, 2, "", 0xedca5849)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, ValOffsetRule(0xa870ebdd, kCFARegister, + 0x42ed390b, 0x98f43aad)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, RegisterRule(0xa870ebdd, 0x3a860351, 0x6c9a6bcf)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()) + .WillOnce(Return(true)); + + // Skip the second FDE. + EXPECT_CALL(handler, Entry(_, 0xc534f7c0, 0xf6552e9, 2, "", 0xedca5849)) + .WillOnce(Return(false)); + + // Process the third FDE. + EXPECT_CALL(handler, Entry(_, 0xf681cfc8, 0x7e4594e, 2, "", 0xedca5849)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, ValOffsetRule(0xf681cfc8, kCFARegister, + 0x42ed390b, 0x98f43aad)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, RegisterRule(0xf681cfc8, 0x26c53934, 0x18eeb8a4)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, End()) + .WillOnce(Return(true)); + } + + ParseSection(§ion); +} + +// Quit processing in the middle of an entry's instructions. +TEST_F(CFIInsn, QuitMidentry) { + CFISection section(kLittleEndian, 8); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_register).ULEB128(0xe0cf850d).ULEB128(0x15aab431) + .D8(dwarf2reader::DW_CFA_expression).ULEB128(0x46750aa5).Block("meat") + .FinishEntry(); + + EXPECT_CALL(handler, RegisterRule(fde_start, 0xe0cf850d, 0x15aab431)) + .InSequence(s).WillOnce(Return(false)); + EXPECT_CALL(handler, End()) + .InSequence(s).WillOnce(Return(true)); + + ParseSection(§ion, false); +} + +class CFIRestore: public CFIInsnFixture, public Test { }; + +TEST_F(CFIRestore, RestoreUndefinedRuleUnchanged) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0x0bac878e) + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + EXPECT_CALL(handler, UndefinedRule(fde_start, 0x0bac878e)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIRestore, RestoreUndefinedRuleChanged) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0x7dedff5f) + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_same_value).ULEB128(0x7dedff5f) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + EXPECT_CALL(handler, UndefinedRule(fde_start, 0x7dedff5f)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, SameValueRule(fde_start + code_factor, 0x7dedff5f)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, UndefinedRule(fde_start + 2 * code_factor, 0x7dedff5f)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIRestore, RestoreSameValueRuleUnchanged) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_same_value).ULEB128(0xadbc9b3a) + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + EXPECT_CALL(handler, SameValueRule(fde_start, 0xadbc9b3a)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIRestore, RestoreSameValueRuleChanged) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_same_value).ULEB128(0x3d90dcb5) + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0x3d90dcb5) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + EXPECT_CALL(handler, SameValueRule(fde_start, 0x3d90dcb5)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, UndefinedRule(fde_start + code_factor, 0x3d90dcb5)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, SameValueRule(fde_start + 2 * code_factor, 0x3d90dcb5)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIRestore, RestoreOffsetRuleUnchanged) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_offset | 0x14).ULEB128(0xb6f) + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + EXPECT_CALL(handler, OffsetRule(fde_start, 0x14, + kCFARegister, 0xb6f * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIRestore, RestoreOffsetRuleChanged) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_offset | 0x21).ULEB128(0xeb7) + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0x21) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + EXPECT_CALL(handler, OffsetRule(fde_start, 0x21, + kCFARegister, 0xeb7 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, UndefinedRule(fde_start + code_factor, 0x21)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, OffsetRule(fde_start + 2 * code_factor, 0x21, + kCFARegister, 0xeb7 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIRestore, RestoreOffsetRuleChangedOffset) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_offset | 0x21).ULEB128(0x134) + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_offset | 0x21).ULEB128(0xf4f) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + EXPECT_CALL(handler, OffsetRule(fde_start, 0x21, + kCFARegister, 0x134 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, OffsetRule(fde_start + code_factor, 0x21, + kCFARegister, 0xf4f * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, OffsetRule(fde_start + 2 * code_factor, 0x21, + kCFARegister, 0x134 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIRestore, RestoreValOffsetRuleUnchanged) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_val_offset).ULEB128(0x829caee6).ULEB128(0xe4c) + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + EXPECT_CALL(handler, ValOffsetRule(fde_start, 0x829caee6, + kCFARegister, 0xe4c * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIRestore, RestoreValOffsetRuleChanged) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_val_offset).ULEB128(0xf17c36d6).ULEB128(0xeb7) + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0xf17c36d6) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + EXPECT_CALL(handler, ValOffsetRule(fde_start, 0xf17c36d6, + kCFARegister, 0xeb7 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, UndefinedRule(fde_start + code_factor, 0xf17c36d6)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, ValOffsetRule(fde_start + 2 * code_factor, 0xf17c36d6, + kCFARegister, 0xeb7 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIRestore, RestoreValOffsetRuleChangedValOffset) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_val_offset).ULEB128(0x2cf0ab1b).ULEB128(0x562) + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_val_offset).ULEB128(0x2cf0ab1b).ULEB128(0xe88) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + EXPECT_CALL(handler, ValOffsetRule(fde_start, 0x2cf0ab1b, + kCFARegister, 0x562 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, ValOffsetRule(fde_start + code_factor, 0x2cf0ab1b, + kCFARegister, 0xe88 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, ValOffsetRule(fde_start + 2 * code_factor, 0x2cf0ab1b, + kCFARegister, 0x562 * data_factor)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIRestore, RestoreRegisterRuleUnchanged) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_register).ULEB128(0x77514acc).ULEB128(0x464de4ce) + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + EXPECT_CALL(handler, RegisterRule(fde_start, 0x77514acc, 0x464de4ce)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIRestore, RestoreRegisterRuleChanged) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_register).ULEB128(0xe39acce5).ULEB128(0x095f1559) + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0xe39acce5) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + EXPECT_CALL(handler, RegisterRule(fde_start, 0xe39acce5, 0x095f1559)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, UndefinedRule(fde_start + code_factor, 0xe39acce5)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, RegisterRule(fde_start + 2 * code_factor, 0xe39acce5, + 0x095f1559)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIRestore, RestoreRegisterRuleChangedRegister) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_register).ULEB128(0xd40e21b1).ULEB128(0x16607d6a) + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_register).ULEB128(0xd40e21b1).ULEB128(0xbabb4742) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + EXPECT_CALL(handler, RegisterRule(fde_start, 0xd40e21b1, 0x16607d6a)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, RegisterRule(fde_start + code_factor, 0xd40e21b1, + 0xbabb4742)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, RegisterRule(fde_start + 2 * code_factor, 0xd40e21b1, + 0x16607d6a)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIRestore, RestoreExpressionRuleUnchanged) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_expression).ULEB128(0x666ae152).Block("dwarf") + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + EXPECT_CALL(handler, ExpressionRule(fde_start, 0x666ae152, "dwarf")) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIRestore, RestoreExpressionRuleChanged) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_expression).ULEB128(0xb5ca5c46).Block("elf") + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0xb5ca5c46) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + EXPECT_CALL(handler, ExpressionRule(fde_start, 0xb5ca5c46, "elf")) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, UndefinedRule(fde_start + code_factor, 0xb5ca5c46)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, ExpressionRule(fde_start + 2 * code_factor, 0xb5ca5c46, + "elf")) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIRestore, RestoreExpressionRuleChangedExpression) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_expression).ULEB128(0x500f5739).Block("smurf") + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_expression).ULEB128(0x500f5739).Block("orc") + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + EXPECT_CALL(handler, ExpressionRule(fde_start, 0x500f5739, "smurf")) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, ExpressionRule(fde_start + code_factor, 0x500f5739, + "orc")) + .InSequence(s).WillOnce(Return(true)); + // Expectations are not wishes. + EXPECT_CALL(handler, ExpressionRule(fde_start + 2 * code_factor, 0x500f5739, + "smurf")) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIRestore, RestoreValExpressionRuleUnchanged) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_val_expression).ULEB128(0x666ae152) + .Block("hideous") + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + EXPECT_CALL(handler, ValExpressionRule(fde_start, 0x666ae152, "hideous")) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIRestore, RestoreValExpressionRuleChanged) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_val_expression).ULEB128(0xb5ca5c46) + .Block("revolting") + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0xb5ca5c46) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("RestoreValExpressionRuleChanged", section); + + EXPECT_CALL(handler, ValExpressionRule(fde_start, 0xb5ca5c46, "revolting")) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, UndefinedRule(fde_start + code_factor, 0xb5ca5c46)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, ValExpressionRule(fde_start + 2 * code_factor, 0xb5ca5c46, + "revolting")) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +TEST_F(CFIRestore, RestoreValExpressionRuleChangedValExpression) { + CFISection section(kLittleEndian, 4); + StockCIEAndFDE(§ion); + section + .D8(dwarf2reader::DW_CFA_val_expression).ULEB128(0x500f5739) + .Block("repulsive") + .D8(dwarf2reader::DW_CFA_remember_state) + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_val_expression).ULEB128(0x500f5739) + .Block("nauseous") + .D8(dwarf2reader::DW_CFA_advance_loc | 1) + .D8(dwarf2reader::DW_CFA_restore_state) + .FinishEntry(); + + PERHAPS_WRITE_DEBUG_FRAME_FILE("RestoreValExpressionRuleChangedValExpression", + section); + + EXPECT_CALL(handler, ValExpressionRule(fde_start, 0x500f5739, "repulsive")) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, ValExpressionRule(fde_start + code_factor, 0x500f5739, + "nauseous")) + .InSequence(s).WillOnce(Return(true)); + // Expectations are not wishes. + EXPECT_CALL(handler, ValExpressionRule(fde_start + 2 * code_factor, 0x500f5739, + "repulsive")) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()).WillOnce(Return(true)); + + ParseSection(§ion); +} + +struct EHFrameFixture: public CFIInsnFixture { + EHFrameFixture() + : CFIInsnFixture(), section(kBigEndian, 4, true) { + encoded_pointer_bases.cfi = 0x7f496cb2; + encoded_pointer_bases.text = 0x540f67b6; + encoded_pointer_bases.data = 0xe3eab768; + section.SetEncodedPointerBases(encoded_pointer_bases); + } + CFISection section; + CFISection::EncodedPointerBases encoded_pointer_bases; + + // Parse CFIInsnFixture::ParseSection, but parse the section as + // .eh_frame data, supplying stock base addresses. + void ParseEHFrameSection(CFISection *section, bool succeeds = true) { + EXPECT_TRUE(section->ContainsEHFrame()); + string contents; + EXPECT_TRUE(section->GetContents(&contents)); + dwarf2reader::Endianness endianness; + if (section->endianness() == kBigEndian) + endianness = ENDIANNESS_BIG; + else { + assert(section->endianness() == kLittleEndian); + endianness = ENDIANNESS_LITTLE; + } + ByteReader byte_reader(endianness); + byte_reader.SetAddressSize(section->AddressSize()); + byte_reader.SetCFIDataBase(encoded_pointer_bases.cfi, + reinterpret_cast<const uint8_t *>(contents.data())); + byte_reader.SetTextBase(encoded_pointer_bases.text); + byte_reader.SetDataBase(encoded_pointer_bases.data); + CallFrameInfo parser(reinterpret_cast<const uint8_t *>(contents.data()), + contents.size(), + &byte_reader, &handler, &reporter, true); + if (succeeds) + EXPECT_TRUE(parser.Start()); + else + EXPECT_FALSE(parser.Start()); + } + +}; + +class EHFrame: public EHFrameFixture, public Test { }; + +// A simple CIE, an FDE, and a terminator. +TEST_F(EHFrame, Terminator) { + Label cie; + section + .Mark(&cie) + .CIEHeader(9968, 2466, 67, 1, "") + .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(3772).ULEB128(1372) + .FinishEntry() + .FDEHeader(cie, 0x848037a1, 0x7b30475e) + .D8(dwarf2reader::DW_CFA_set_loc).D32(0x17713850) + .D8(dwarf2reader::DW_CFA_undefined).ULEB128(5721) + .FinishEntry() + .D32(0) // Terminate the sequence. + // This FDE should be ignored. + .FDEHeader(cie, 0xf19629fe, 0x439fb09b) + .FinishEntry(); + + PERHAPS_WRITE_EH_FRAME_FILE("EHFrame.Terminator", section); + + EXPECT_CALL(handler, Entry(_, 0x848037a1, 0x7b30475e, 1, "", 67)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, ValOffsetRule(0x848037a1, kCFARegister, 3772, 1372)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, UndefinedRule(0x17713850, 5721)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(reporter, EarlyEHTerminator(_)) + .InSequence(s).WillOnce(Return()); + + ParseEHFrameSection(§ion); +} + +// The parser should recognize the Linux Standards Base 'z' augmentations. +TEST_F(EHFrame, SimpleFDE) { + DwarfPointerEncoding lsda_encoding = + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_indirect + | dwarf2reader::DW_EH_PE_datarel + | dwarf2reader::DW_EH_PE_sdata2); + DwarfPointerEncoding fde_encoding = + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_textrel + | dwarf2reader::DW_EH_PE_udata2); + + section.SetPointerEncoding(fde_encoding); + section.SetEncodedPointerBases(encoded_pointer_bases); + Label cie; + section + .Mark(&cie) + .CIEHeader(4873, 7012, 100, 1, "zSLPR") + .ULEB128(7) // Augmentation data length + .D8(lsda_encoding) // LSDA pointer format + .D8(dwarf2reader::DW_EH_PE_pcrel) // personality pointer format + .EncodedPointer(0x97baa00, dwarf2reader::DW_EH_PE_pcrel) // and value + .D8(fde_encoding) // FDE pointer format + .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(6706).ULEB128(31) + .FinishEntry() + .FDEHeader(cie, 0x540f6b56, 0xf686) + .ULEB128(2) // Augmentation data length + .EncodedPointer(0xe3eab475, lsda_encoding) // LSDA pointer, signed + .D8(dwarf2reader::DW_CFA_set_loc) + .EncodedPointer(0x540fa4ce, fde_encoding) + .D8(dwarf2reader::DW_CFA_undefined).ULEB128(0x675e) + .FinishEntry() + .D32(0); // terminator + + PERHAPS_WRITE_EH_FRAME_FILE("EHFrame.SimpleFDE", section); + + EXPECT_CALL(handler, Entry(_, 0x540f6b56, 0xf686, 1, "zSLPR", 100)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, PersonalityRoutine(0x97baa00, false)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, LanguageSpecificDataArea(0xe3eab475, true)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, SignalHandler()) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, ValOffsetRule(0x540f6b56, kCFARegister, 6706, 31)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, UndefinedRule(0x540fa4ce, 0x675e)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()) + .InSequence(s).WillOnce(Return(true)); + + ParseEHFrameSection(§ion); +} + +// Check that we can handle an empty 'z' augmentation. +TEST_F(EHFrame, EmptyZ) { + Label cie; + section + .Mark(&cie) + .CIEHeader(5955, 5805, 228, 1, "z") + .ULEB128(0) // Augmentation data length + .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(3629).ULEB128(247) + .FinishEntry() + .FDEHeader(cie, 0xda007738, 0xfb55c641) + .ULEB128(0) // Augmentation data length + .D8(dwarf2reader::DW_CFA_advance_loc1).D8(11) + .D8(dwarf2reader::DW_CFA_undefined).ULEB128(3769) + .FinishEntry(); + + PERHAPS_WRITE_EH_FRAME_FILE("EHFrame.EmptyZ", section); + + EXPECT_CALL(handler, Entry(_, 0xda007738, 0xfb55c641, 1, "z", 228)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, ValOffsetRule(0xda007738, kCFARegister, 3629, 247)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, UndefinedRule(0xda007738 + 11 * 5955, 3769)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()) + .InSequence(s).WillOnce(Return(true)); + + ParseEHFrameSection(§ion); +} + +// Check that we recognize bad 'z' augmentation characters. +TEST_F(EHFrame, BadZ) { + Label cie; + section + .Mark(&cie) + .CIEHeader(6937, 1045, 142, 1, "zQ") + .ULEB128(0) // Augmentation data length + .D8(dwarf2reader::DW_CFA_def_cfa).ULEB128(9006).ULEB128(7725) + .FinishEntry() + .FDEHeader(cie, 0x1293efa8, 0x236f53f2) + .ULEB128(0) // Augmentation data length + .D8(dwarf2reader::DW_CFA_advance_loc | 12) + .D8(dwarf2reader::DW_CFA_register).ULEB128(5667).ULEB128(3462) + .FinishEntry(); + + PERHAPS_WRITE_EH_FRAME_FILE("EHFrame.BadZ", section); + + EXPECT_CALL(reporter, UnrecognizedAugmentation(_, "zQ")) + .WillOnce(Return()); + + ParseEHFrameSection(§ion, false); +} + +TEST_F(EHFrame, zL) { + Label cie; + DwarfPointerEncoding lsda_encoding = + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_funcrel + | dwarf2reader::DW_EH_PE_udata2); + section + .Mark(&cie) + .CIEHeader(9285, 9959, 54, 1, "zL") + .ULEB128(1) // Augmentation data length + .D8(lsda_encoding) // encoding for LSDA pointer in FDE + + .FinishEntry() + .FDEHeader(cie, 0xd40091aa, 0x9aa6e746) + .ULEB128(2) // Augmentation data length + .EncodedPointer(0xd40099cd, lsda_encoding) // LSDA pointer + .FinishEntry() + .D32(0); // terminator + + PERHAPS_WRITE_EH_FRAME_FILE("EHFrame.zL", section); + + EXPECT_CALL(handler, Entry(_, 0xd40091aa, 0x9aa6e746, 1, "zL", 54)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, LanguageSpecificDataArea(0xd40099cd, false)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()) + .InSequence(s).WillOnce(Return(true)); + + ParseEHFrameSection(§ion); +} + +TEST_F(EHFrame, zP) { + Label cie; + DwarfPointerEncoding personality_encoding = + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_datarel + | dwarf2reader::DW_EH_PE_udata2); + section + .Mark(&cie) + .CIEHeader(1097, 6313, 17, 1, "zP") + .ULEB128(3) // Augmentation data length + .D8(personality_encoding) // encoding for personality routine + .EncodedPointer(0xe3eaccac, personality_encoding) // value + .FinishEntry() + .FDEHeader(cie, 0x0c8350c9, 0xbef11087) + .ULEB128(0) // Augmentation data length + .FinishEntry() + .D32(0); // terminator + + PERHAPS_WRITE_EH_FRAME_FILE("EHFrame.zP", section); + + EXPECT_CALL(handler, Entry(_, 0x0c8350c9, 0xbef11087, 1, "zP", 17)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, PersonalityRoutine(0xe3eaccac, false)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()) + .InSequence(s).WillOnce(Return(true)); + + ParseEHFrameSection(§ion); +} + +TEST_F(EHFrame, zR) { + Label cie; + DwarfPointerEncoding pointer_encoding = + DwarfPointerEncoding(dwarf2reader::DW_EH_PE_textrel + | dwarf2reader::DW_EH_PE_sdata2); + section.SetPointerEncoding(pointer_encoding); + section + .Mark(&cie) + .CIEHeader(8011, 5496, 75, 1, "zR") + .ULEB128(1) // Augmentation data length + .D8(pointer_encoding) // encoding for FDE addresses + .FinishEntry() + .FDEHeader(cie, 0x540f9431, 0xbd0) + .ULEB128(0) // Augmentation data length + .FinishEntry() + .D32(0); // terminator + + PERHAPS_WRITE_EH_FRAME_FILE("EHFrame.zR", section); + + EXPECT_CALL(handler, Entry(_, 0x540f9431, 0xbd0, 1, "zR", 75)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()) + .InSequence(s).WillOnce(Return(true)); + + ParseEHFrameSection(§ion); +} + +TEST_F(EHFrame, zS) { + Label cie; + section + .Mark(&cie) + .CIEHeader(9217, 7694, 57, 1, "zS") + .ULEB128(0) // Augmentation data length + .FinishEntry() + .FDEHeader(cie, 0xd40091aa, 0x9aa6e746) + .ULEB128(0) // Augmentation data length + .FinishEntry() + .D32(0); // terminator + + PERHAPS_WRITE_EH_FRAME_FILE("EHFrame.zS", section); + + EXPECT_CALL(handler, Entry(_, 0xd40091aa, 0x9aa6e746, 1, "zS", 57)) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, SignalHandler()) + .InSequence(s).WillOnce(Return(true)); + EXPECT_CALL(handler, End()) + .InSequence(s).WillOnce(Return(true)); + + ParseEHFrameSection(§ion); +} + +// These tests require manual inspection of the test output. +struct CFIReporterFixture { + CFIReporterFixture() : reporter("test file name", "test section name") { } + CallFrameInfo::Reporter reporter; +}; + +class CFIReporter: public CFIReporterFixture, public Test { }; + +TEST_F(CFIReporter, Incomplete) { + reporter.Incomplete(0x0102030405060708ULL, CallFrameInfo::kUnknown); +} + +TEST_F(CFIReporter, EarlyEHTerminator) { + reporter.EarlyEHTerminator(0x0102030405060708ULL); +} + +TEST_F(CFIReporter, CIEPointerOutOfRange) { + reporter.CIEPointerOutOfRange(0x0123456789abcdefULL, 0xfedcba9876543210ULL); +} + +TEST_F(CFIReporter, BadCIEId) { + reporter.BadCIEId(0x0123456789abcdefULL, 0xfedcba9876543210ULL); +} + +TEST_F(CFIReporter, UnrecognizedVersion) { + reporter.UnrecognizedVersion(0x0123456789abcdefULL, 43); +} + +TEST_F(CFIReporter, UnrecognizedAugmentation) { + reporter.UnrecognizedAugmentation(0x0123456789abcdefULL, "poodles"); +} + +TEST_F(CFIReporter, InvalidPointerEncoding) { + reporter.InvalidPointerEncoding(0x0123456789abcdefULL, 0x42); +} + +TEST_F(CFIReporter, UnusablePointerEncoding) { + reporter.UnusablePointerEncoding(0x0123456789abcdefULL, 0x42); +} + +TEST_F(CFIReporter, RestoreInCIE) { + reporter.RestoreInCIE(0x0123456789abcdefULL, 0xfedcba9876543210ULL); +} + +TEST_F(CFIReporter, BadInstruction) { + reporter.BadInstruction(0x0123456789abcdefULL, CallFrameInfo::kFDE, + 0xfedcba9876543210ULL); +} + +TEST_F(CFIReporter, NoCFARule) { + reporter.NoCFARule(0x0123456789abcdefULL, CallFrameInfo::kCIE, + 0xfedcba9876543210ULL); +} + +TEST_F(CFIReporter, EmptyStateStack) { + reporter.EmptyStateStack(0x0123456789abcdefULL, CallFrameInfo::kTerminator, + 0xfedcba9876543210ULL); +} + +TEST_F(CFIReporter, ClearingCFARule) { + reporter.ClearingCFARule(0x0123456789abcdefULL, CallFrameInfo::kFDE, + 0xfedcba9876543210ULL); +} + +#ifdef WRITE_ELF +// See comments at the top of the file mentioning WRITE_ELF for details. + +using google_breakpad::test_assembler::Section; + +struct ELFSectionHeader { + ELFSectionHeader(unsigned int set_type) + : type(set_type), flags(0), address(0), link(0), info(0), + alignment(1), entry_size(0) { } + Label name; + unsigned int type; + uint64_t flags; + uint64_t address; + Label file_offset; + Label file_size; + unsigned int link; + unsigned int info; + uint64_t alignment; + uint64_t entry_size; +}; + +void AppendSectionHeader(CFISection *table, const ELFSectionHeader &header) { + (*table) + .D32(header.name) // name, index in string tbl + .D32(header.type) // type + .Address(header.flags) // flags + .Address(header.address) // address in memory + .Address(header.file_offset) // offset in ELF file + .Address(header.file_size) // length in bytes + .D32(header.link) // link to related section + .D32(header.info) // miscellaneous + .Address(header.alignment) // alignment + .Address(header.entry_size); // entry size +} + +void WriteELFFrameSection(const char *filename, const char *cfi_name, + const CFISection &cfi) { + int elf_class = cfi.AddressSize() == 4 ? ELFCLASS32 : ELFCLASS64; + int elf_data = (cfi.endianness() == kBigEndian + ? ELFDATA2MSB : ELFDATA2LSB); + CFISection elf(cfi.endianness(), cfi.AddressSize()); + Label elf_header_size, section_table_offset; + elf + .Append("\x7f" "ELF") + .D8(elf_class) // 32-bit or 64-bit ELF + .D8(elf_data) // endianness + .D8(1) // ELF version + .D8(ELFOSABI_LINUX) // Operating System/ABI indication + .D8(0) // ABI version + .Append(7, 0xda) // padding + .D16(ET_EXEC) // file type: executable file + .D16(EM_386) // architecture: Intel IA-32 + .D32(EV_CURRENT); // ELF version + elf + .Address(0x0123456789abcdefULL) // program entry point + .Address(0) // program header offset + .Address(section_table_offset) // section header offset + .D32(0) // processor-specific flags + .D16(elf_header_size) // ELF header size in bytes */ + .D16(elf_class == ELFCLASS32 ? 32 : 56) // program header entry size + .D16(0) // program header table entry count + .D16(elf_class == ELFCLASS32 ? 40 : 64) // section header entry size + .D16(3) // section count + .D16(1) // section name string table + .Mark(&elf_header_size); + + // The null section. Every ELF file has one, as the first entry in + // the section header table. + ELFSectionHeader null_header(SHT_NULL); + null_header.file_offset = 0; + null_header.file_size = 0; + + // The CFI section. The whole reason for writing out this ELF file + // is to put this in it so that we can run other dumping programs on + // it to check its contents. + ELFSectionHeader cfi_header(SHT_PROGBITS); + cfi_header.file_size = cfi.Size(); + + // The section holding the names of the sections. This is the + // section whose index appears in the e_shstrndx member of the ELF + // header. + ELFSectionHeader section_names_header(SHT_STRTAB); + CFISection section_names(cfi.endianness(), cfi.AddressSize()); + section_names + .Mark(&null_header.name) + .AppendCString("") + .Mark(§ion_names_header.name) + .AppendCString(".shstrtab") + .Mark(&cfi_header.name) + .AppendCString(cfi_name) + .Mark(§ion_names_header.file_size); + + // Create the section table. The ELF header's e_shoff member refers + // to this, and the e_shnum member gives the number of entries it + // contains. + CFISection section_table(cfi.endianness(), cfi.AddressSize()); + AppendSectionHeader(§ion_table, null_header); + AppendSectionHeader(§ion_table, section_names_header); + AppendSectionHeader(§ion_table, cfi_header); + + // Append the section table and the section contents to the ELF file. + elf + .Mark(§ion_table_offset) + .Append(section_table) + .Mark(§ion_names_header.file_offset) + .Append(section_names) + .Mark(&cfi_header.file_offset) + .Append(cfi); + + string contents; + if (!elf.GetContents(&contents)) { + fprintf(stderr, "failed to get ELF file contents\n"); + exit(1); + } + + FILE *out = fopen(filename, "w"); + if (!out) { + fprintf(stderr, "error opening ELF file '%s': %s\n", + filename, strerror(errno)); + exit(1); + } + + if (fwrite(contents.data(), 1, contents.size(), out) != contents.size()) { + fprintf(stderr, "error writing ELF data to '%s': %s\n", + filename, strerror(errno)); + exit(1); + } + + if (fclose(out) == EOF) { + fprintf(stderr, "error closing ELF file '%s': %s\n", + filename, strerror(errno)); + exit(1); + } +} +#endif diff --git a/3rdParty/Breakpad/src/common/dwarf/dwarf2reader_die_unittest.cc b/3rdParty/Breakpad/src/common/dwarf/dwarf2reader_die_unittest.cc new file mode 100644 index 0000000..71418eb --- /dev/null +++ b/3rdParty/Breakpad/src/common/dwarf/dwarf2reader_die_unittest.cc @@ -0,0 +1,487 @@ +// Copyright (c) 2012, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com> + +// dwarf2reader_die_unittest.cc: Unit tests for dwarf2reader::CompilationUnit + +#include <stdint.h> +#include <stdlib.h> + +#include <iostream> +#include <string> +#include <vector> + +#include "breakpad_googletest_includes.h" +#include "common/dwarf/bytereader-inl.h" +#include "common/dwarf/dwarf2reader_test_common.h" +#include "common/dwarf/dwarf2reader.h" +#include "common/using_std_string.h" +#include "google_breakpad/common/breakpad_types.h" + +using google_breakpad::test_assembler::Endianness; +using google_breakpad::test_assembler::Label; +using google_breakpad::test_assembler::Section; +using google_breakpad::test_assembler::kBigEndian; +using google_breakpad::test_assembler::kLittleEndian; + +using dwarf2reader::ByteReader; +using dwarf2reader::CompilationUnit; +using dwarf2reader::Dwarf2Handler; +using dwarf2reader::DwarfAttribute; +using dwarf2reader::DwarfForm; +using dwarf2reader::DwarfHasChild; +using dwarf2reader::DwarfTag; +using dwarf2reader::ENDIANNESS_BIG; +using dwarf2reader::ENDIANNESS_LITTLE; +using dwarf2reader::SectionMap; + +using std::vector; +using testing::InSequence; +using testing::Pointee; +using testing::Return; +using testing::Sequence; +using testing::Test; +using testing::TestWithParam; +using testing::_; + +class MockDwarf2Handler: public Dwarf2Handler { + public: + MOCK_METHOD5(StartCompilationUnit, bool(uint64 offset, uint8 address_size, + uint8 offset_size, uint64 cu_length, + uint8 dwarf_version)); + MOCK_METHOD2(StartDIE, bool(uint64 offset, enum DwarfTag tag)); + MOCK_METHOD4(ProcessAttributeUnsigned, void(uint64 offset, + DwarfAttribute attr, + enum DwarfForm form, + uint64 data)); + MOCK_METHOD4(ProcessAttributeSigned, void(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + int64 data)); + MOCK_METHOD4(ProcessAttributeReference, void(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + uint64 data)); + MOCK_METHOD5(ProcessAttributeBuffer, void(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + const uint8_t *data, + uint64 len)); + MOCK_METHOD4(ProcessAttributeString, void(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + const string& data)); + MOCK_METHOD4(ProcessAttributeSignature, void(uint64 offset, + DwarfAttribute attr, + enum DwarfForm form, + uint64 signature)); + MOCK_METHOD1(EndDIE, void(uint64 offset)); +}; + +struct DIEFixture { + + DIEFixture() { + // Fix the initial offset of the .debug_info and .debug_abbrev sections. + info.start() = 0; + abbrevs.start() = 0; + + // Default expectations for the data handler. + EXPECT_CALL(handler, StartCompilationUnit(_, _, _, _, _)).Times(0); + EXPECT_CALL(handler, StartDIE(_, _)).Times(0); + EXPECT_CALL(handler, ProcessAttributeUnsigned(_, _, _, _)).Times(0); + EXPECT_CALL(handler, ProcessAttributeSigned(_, _, _, _)).Times(0); + EXPECT_CALL(handler, ProcessAttributeReference(_, _, _, _)).Times(0); + EXPECT_CALL(handler, ProcessAttributeBuffer(_, _, _, _, _)).Times(0); + EXPECT_CALL(handler, ProcessAttributeString(_, _, _, _)).Times(0); + EXPECT_CALL(handler, EndDIE(_)).Times(0); + } + + // Return a reference to a section map whose .debug_info section refers + // to |info|, and whose .debug_abbrev section refers to |abbrevs|. This + // function returns a reference to the same SectionMap each time; new + // calls wipe out maps established by earlier calls. + const SectionMap &MakeSectionMap() { + // Copy the sections' contents into strings that will live as long as + // the map itself. + assert(info.GetContents(&info_contents)); + assert(abbrevs.GetContents(&abbrevs_contents)); + section_map.clear(); + section_map[".debug_info"].first + = reinterpret_cast<const uint8_t *>(info_contents.data()); + section_map[".debug_info"].second = info_contents.size(); + section_map[".debug_abbrev"].first + = reinterpret_cast<const uint8_t *>(abbrevs_contents.data()); + section_map[".debug_abbrev"].second = abbrevs_contents.size(); + return section_map; + } + + TestCompilationUnit info; + TestAbbrevTable abbrevs; + MockDwarf2Handler handler; + string abbrevs_contents, info_contents; + SectionMap section_map; +}; + +struct DwarfHeaderParams { + DwarfHeaderParams(Endianness endianness, size_t format_size, + int version, size_t address_size) + : endianness(endianness), format_size(format_size), + version(version), address_size(address_size) { } + Endianness endianness; + size_t format_size; // 4-byte or 8-byte DWARF offsets + int version; + size_t address_size; +}; + +class DwarfHeader: public DIEFixture, + public TestWithParam<DwarfHeaderParams> { }; + +TEST_P(DwarfHeader, Header) { + Label abbrev_table = abbrevs.Here(); + abbrevs.Abbrev(1, dwarf2reader::DW_TAG_compile_unit, + dwarf2reader::DW_children_yes) + .Attribute(dwarf2reader::DW_AT_name, dwarf2reader::DW_FORM_string) + .EndAbbrev() + .EndTable(); + + info.set_format_size(GetParam().format_size); + info.set_endianness(GetParam().endianness); + + info.Header(GetParam().version, abbrev_table, GetParam().address_size) + .ULEB128(1) // DW_TAG_compile_unit, with children + .AppendCString("sam") // DW_AT_name, DW_FORM_string + .D8(0); // end of children + info.Finish(); + + { + InSequence s; + EXPECT_CALL(handler, + StartCompilationUnit(0, GetParam().address_size, + GetParam().format_size, _, + GetParam().version)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, StartDIE(_, dwarf2reader::DW_TAG_compile_unit)) + .WillOnce(Return(true)); + EXPECT_CALL(handler, ProcessAttributeString(_, dwarf2reader::DW_AT_name, + dwarf2reader::DW_FORM_string, + "sam")) + .WillOnce(Return()); + EXPECT_CALL(handler, EndDIE(_)) + .WillOnce(Return()); + } + + ByteReader byte_reader(GetParam().endianness == kLittleEndian ? + ENDIANNESS_LITTLE : ENDIANNESS_BIG); + CompilationUnit parser("", MakeSectionMap(), 0, &byte_reader, &handler); + EXPECT_EQ(parser.Start(), info_contents.size()); +} + +INSTANTIATE_TEST_CASE_P( + HeaderVariants, DwarfHeader, + ::testing::Values(DwarfHeaderParams(kLittleEndian, 4, 2, 4), + DwarfHeaderParams(kLittleEndian, 4, 2, 8), + DwarfHeaderParams(kLittleEndian, 4, 3, 4), + DwarfHeaderParams(kLittleEndian, 4, 3, 8), + DwarfHeaderParams(kLittleEndian, 4, 4, 4), + DwarfHeaderParams(kLittleEndian, 4, 4, 8), + DwarfHeaderParams(kLittleEndian, 8, 2, 4), + DwarfHeaderParams(kLittleEndian, 8, 2, 8), + DwarfHeaderParams(kLittleEndian, 8, 3, 4), + DwarfHeaderParams(kLittleEndian, 8, 3, 8), + DwarfHeaderParams(kLittleEndian, 8, 4, 4), + DwarfHeaderParams(kLittleEndian, 8, 4, 8), + DwarfHeaderParams(kBigEndian, 4, 2, 4), + DwarfHeaderParams(kBigEndian, 4, 2, 8), + DwarfHeaderParams(kBigEndian, 4, 3, 4), + DwarfHeaderParams(kBigEndian, 4, 3, 8), + DwarfHeaderParams(kBigEndian, 4, 4, 4), + DwarfHeaderParams(kBigEndian, 4, 4, 8), + DwarfHeaderParams(kBigEndian, 8, 2, 4), + DwarfHeaderParams(kBigEndian, 8, 2, 8), + DwarfHeaderParams(kBigEndian, 8, 3, 4), + DwarfHeaderParams(kBigEndian, 8, 3, 8), + DwarfHeaderParams(kBigEndian, 8, 4, 4), + DwarfHeaderParams(kBigEndian, 8, 4, 8))); + +struct DwarfFormsFixture: public DIEFixture { + // Start a compilation unit, as directed by |params|, containing one + // childless DIE of the given tag, with one attribute of the given name + // and form. The 'info' fixture member is left just after the abbrev + // code, waiting for the attribute value to be appended. + void StartSingleAttributeDIE(const DwarfHeaderParams ¶ms, + DwarfTag tag, DwarfAttribute name, + DwarfForm form) { + // Create the abbreviation table. + Label abbrev_table = abbrevs.Here(); + abbrevs.Abbrev(1, tag, dwarf2reader::DW_children_no) + .Attribute(name, form) + .EndAbbrev() + .EndTable(); + + // Create the compilation unit, up to the attribute value. + info.set_format_size(params.format_size); + info.set_endianness(params.endianness); + info.Header(params.version, abbrev_table, params.address_size) + .ULEB128(1); // abbrev code + } + + // Set up handler to expect a compilation unit matching |params|, + // containing one childless DIE of the given tag, in the sequence s. Stop + // just before the expectations. + void ExpectBeginCompilationUnit(const DwarfHeaderParams ¶ms, + DwarfTag tag, uint64 offset=0) { + EXPECT_CALL(handler, + StartCompilationUnit(offset, params.address_size, + params.format_size, _, + params.version)) + .InSequence(s) + .WillOnce(Return(true)); + EXPECT_CALL(handler, StartDIE(_, tag)) + .InSequence(s) + .WillOnce(Return(true)); + } + + void ExpectEndCompilationUnit() { + EXPECT_CALL(handler, EndDIE(_)) + .InSequence(s) + .WillOnce(Return()); + } + + void ParseCompilationUnit(const DwarfHeaderParams ¶ms, uint64 offset=0) { + ByteReader byte_reader(params.endianness == kLittleEndian ? + ENDIANNESS_LITTLE : ENDIANNESS_BIG); + CompilationUnit parser("", MakeSectionMap(), offset, &byte_reader, &handler); + EXPECT_EQ(offset + parser.Start(), info_contents.size()); + } + + // The sequence to which the fixture's methods append expectations. + Sequence s; +}; + +struct DwarfForms: public DwarfFormsFixture, + public TestWithParam<DwarfHeaderParams> { }; + +TEST_P(DwarfForms, addr) { + StartSingleAttributeDIE(GetParam(), dwarf2reader::DW_TAG_compile_unit, + dwarf2reader::DW_AT_low_pc, + dwarf2reader::DW_FORM_addr); + uint64_t value; + if (GetParam().address_size == 4) { + value = 0xc8e9ffcc; + info.D32(value); + } else { + value = 0xe942517fc2768564ULL; + info.D64(value); + } + info.Finish(); + + ExpectBeginCompilationUnit(GetParam(), dwarf2reader::DW_TAG_compile_unit); + EXPECT_CALL(handler, ProcessAttributeUnsigned(_, dwarf2reader::DW_AT_low_pc, + dwarf2reader::DW_FORM_addr, + value)) + .InSequence(s) + .WillOnce(Return()); + ExpectEndCompilationUnit(); + + ParseCompilationUnit(GetParam()); +} + +TEST_P(DwarfForms, block2_empty) { + StartSingleAttributeDIE(GetParam(), (DwarfTag) 0x16e4d2f7, + (DwarfAttribute) 0xe52c4463, + dwarf2reader::DW_FORM_block2); + info.D16(0); + info.Finish(); + + ExpectBeginCompilationUnit(GetParam(), (DwarfTag) 0x16e4d2f7); + EXPECT_CALL(handler, ProcessAttributeBuffer(_, (DwarfAttribute) 0xe52c4463, + dwarf2reader::DW_FORM_block2, + _, 0)) + .InSequence(s) + .WillOnce(Return()); + ExpectEndCompilationUnit(); + + ParseCompilationUnit(GetParam()); +} + +TEST_P(DwarfForms, block2) { + StartSingleAttributeDIE(GetParam(), (DwarfTag) 0x16e4d2f7, + (DwarfAttribute) 0xe52c4463, + dwarf2reader::DW_FORM_block2); + unsigned char data[258]; + memset(data, '*', sizeof(data)); + info.D16(sizeof(data)) + .Append(data, sizeof(data)); + info.Finish(); + + ExpectBeginCompilationUnit(GetParam(), (DwarfTag) 0x16e4d2f7); + EXPECT_CALL(handler, ProcessAttributeBuffer(_, (DwarfAttribute) 0xe52c4463, + dwarf2reader::DW_FORM_block2, + Pointee('*'), 258)) + .InSequence(s) + .WillOnce(Return()); + ExpectEndCompilationUnit(); + + ParseCompilationUnit(GetParam()); +} + +TEST_P(DwarfForms, flag_present) { + StartSingleAttributeDIE(GetParam(), (DwarfTag) 0x3e449ac2, + (DwarfAttribute) 0x359d1972, + dwarf2reader::DW_FORM_flag_present); + // DW_FORM_flag_present occupies no space in the DIE. + info.Finish(); + + ExpectBeginCompilationUnit(GetParam(), (DwarfTag) 0x3e449ac2); + EXPECT_CALL(handler, + ProcessAttributeUnsigned(_, (DwarfAttribute) 0x359d1972, + dwarf2reader::DW_FORM_flag_present, + 1)) + .InSequence(s) + .WillOnce(Return()); + ExpectEndCompilationUnit(); + + ParseCompilationUnit(GetParam()); +} + +TEST_P(DwarfForms, sec_offset) { + StartSingleAttributeDIE(GetParam(), (DwarfTag) 0x1d971689, + (DwarfAttribute) 0xa060bfd1, + dwarf2reader::DW_FORM_sec_offset); + uint64_t value; + if (GetParam().format_size == 4) { + value = 0xacc9c388; + info.D32(value); + } else { + value = 0xcffe5696ffe3ed0aULL; + info.D64(value); + } + info.Finish(); + + ExpectBeginCompilationUnit(GetParam(), (DwarfTag) 0x1d971689); + EXPECT_CALL(handler, ProcessAttributeUnsigned(_, (DwarfAttribute) 0xa060bfd1, + dwarf2reader::DW_FORM_sec_offset, + value)) + .InSequence(s) + .WillOnce(Return()); + ExpectEndCompilationUnit(); + + ParseCompilationUnit(GetParam()); +} + +TEST_P(DwarfForms, exprloc) { + StartSingleAttributeDIE(GetParam(), (DwarfTag) 0xb6d167bb, + (DwarfAttribute) 0xba3ae5cb, + dwarf2reader::DW_FORM_exprloc); + info.ULEB128(29) + .Append(29, 173); + info.Finish(); + + ExpectBeginCompilationUnit(GetParam(), (DwarfTag) 0xb6d167bb); + EXPECT_CALL(handler, ProcessAttributeBuffer(_, (DwarfAttribute) 0xba3ae5cb, + dwarf2reader::DW_FORM_exprloc, + Pointee(173), 29)) + .InSequence(s) + .WillOnce(Return()); + ExpectEndCompilationUnit(); + + ParseCompilationUnit(GetParam()); +} + +TEST_P(DwarfForms, ref_sig8) { + StartSingleAttributeDIE(GetParam(), (DwarfTag) 0x253e7b2b, + (DwarfAttribute) 0xd708d908, + dwarf2reader::DW_FORM_ref_sig8); + info.D64(0xf72fa0cb6ddcf9d6ULL); + info.Finish(); + + ExpectBeginCompilationUnit(GetParam(), (DwarfTag) 0x253e7b2b); + EXPECT_CALL(handler, ProcessAttributeSignature(_, (DwarfAttribute) 0xd708d908, + dwarf2reader::DW_FORM_ref_sig8, + 0xf72fa0cb6ddcf9d6ULL)) + .InSequence(s) + .WillOnce(Return()); + ExpectEndCompilationUnit(); + + ParseCompilationUnit(GetParam()); +} + +// A value passed to ProcessAttributeSignature is just an absolute number, +// not an offset within the compilation unit as most of the other +// DW_FORM_ref forms are. Check that the reader doesn't try to apply any +// offset to the signature, by reading it from a compilation unit that does +// not start at the beginning of the section. +TEST_P(DwarfForms, ref_sig8_not_first) { + info.Append(98, '*'); + StartSingleAttributeDIE(GetParam(), (DwarfTag) 0x253e7b2b, + (DwarfAttribute) 0xd708d908, + dwarf2reader::DW_FORM_ref_sig8); + info.D64(0xf72fa0cb6ddcf9d6ULL); + info.Finish(); + + ExpectBeginCompilationUnit(GetParam(), (DwarfTag) 0x253e7b2b, 98); + EXPECT_CALL(handler, ProcessAttributeSignature(_, (DwarfAttribute) 0xd708d908, + dwarf2reader::DW_FORM_ref_sig8, + 0xf72fa0cb6ddcf9d6ULL)) + .InSequence(s) + .WillOnce(Return()); + ExpectEndCompilationUnit(); + + ParseCompilationUnit(GetParam(), 98); +} + +// Tests for the other attribute forms could go here. + +INSTANTIATE_TEST_CASE_P( + HeaderVariants, DwarfForms, + ::testing::Values(DwarfHeaderParams(kLittleEndian, 4, 2, 4), + DwarfHeaderParams(kLittleEndian, 4, 2, 8), + DwarfHeaderParams(kLittleEndian, 4, 3, 4), + DwarfHeaderParams(kLittleEndian, 4, 3, 8), + DwarfHeaderParams(kLittleEndian, 4, 4, 4), + DwarfHeaderParams(kLittleEndian, 4, 4, 8), + DwarfHeaderParams(kLittleEndian, 8, 2, 4), + DwarfHeaderParams(kLittleEndian, 8, 2, 8), + DwarfHeaderParams(kLittleEndian, 8, 3, 4), + DwarfHeaderParams(kLittleEndian, 8, 3, 8), + DwarfHeaderParams(kLittleEndian, 8, 4, 4), + DwarfHeaderParams(kLittleEndian, 8, 4, 8), + DwarfHeaderParams(kBigEndian, 4, 2, 4), + DwarfHeaderParams(kBigEndian, 4, 2, 8), + DwarfHeaderParams(kBigEndian, 4, 3, 4), + DwarfHeaderParams(kBigEndian, 4, 3, 8), + DwarfHeaderParams(kBigEndian, 4, 4, 4), + DwarfHeaderParams(kBigEndian, 4, 4, 8), + DwarfHeaderParams(kBigEndian, 8, 2, 4), + DwarfHeaderParams(kBigEndian, 8, 2, 8), + DwarfHeaderParams(kBigEndian, 8, 3, 4), + DwarfHeaderParams(kBigEndian, 8, 3, 8), + DwarfHeaderParams(kBigEndian, 8, 4, 4), + DwarfHeaderParams(kBigEndian, 8, 4, 8))); diff --git a/3rdParty/Breakpad/src/common/dwarf/dwarf2reader_test_common.h b/3rdParty/Breakpad/src/common/dwarf/dwarf2reader_test_common.h new file mode 100644 index 0000000..e91de90 --- /dev/null +++ b/3rdParty/Breakpad/src/common/dwarf/dwarf2reader_test_common.h @@ -0,0 +1,149 @@ +// -*- mode: c++ -*- + +// Copyright (c) 2012, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com> + +// dwarf2reader_test_common.h: Define TestCompilationUnit and +// TestAbbrevTable, classes for creating properly (and improperly) +// formatted DWARF compilation unit data for unit tests. + +#ifndef COMMON_DWARF_DWARF2READER_TEST_COMMON_H__ +#define COMMON_DWARF_DWARF2READER_TEST_COMMON_H__ + +#include "common/test_assembler.h" +#include "common/dwarf/dwarf2enums.h" + +// A subclass of test_assembler::Section, specialized for constructing +// DWARF compilation units. +class TestCompilationUnit: public google_breakpad::test_assembler::Section { + public: + typedef dwarf2reader::DwarfTag DwarfTag; + typedef dwarf2reader::DwarfAttribute DwarfAttribute; + typedef dwarf2reader::DwarfForm DwarfForm; + typedef google_breakpad::test_assembler::Label Label; + + // Set the section's DWARF format size (the 32-bit DWARF format or the + // 64-bit DWARF format, for lengths and section offsets --- not the + // address size) to format_size. + void set_format_size(size_t format_size) { + assert(format_size == 4 || format_size == 8); + format_size_ = format_size; + } + + // Append a DWARF section offset value, of the appropriate size for this + // compilation unit. + template<typename T> + void SectionOffset(T offset) { + if (format_size_ == 4) + D32(offset); + else + D64(offset); + } + + // Append a DWARF compilation unit header to the section, with the given + // DWARF version, abbrev table offset, and address size. + TestCompilationUnit &Header(int version, const Label &abbrev_offset, + size_t address_size) { + if (format_size_ == 4) { + D32(length_); + } else { + D32(0xffffffff); + D64(length_); + } + post_length_offset_ = Size(); + D16(version); + SectionOffset(abbrev_offset); + D8(address_size); + return *this; + } + + // Mark the end of this header's DIEs. + TestCompilationUnit &Finish() { + length_ = Size() - post_length_offset_; + return *this; + } + + private: + // The DWARF format size for this compilation unit. + size_t format_size_; + + // The offset of the point in the compilation unit header immediately + // after the initial length field. + uint64_t post_length_offset_; + + // The length of the compilation unit, not including the initial length field. + Label length_; +}; + +// A subclass of test_assembler::Section specialized for constructing DWARF +// abbreviation tables. +class TestAbbrevTable: public google_breakpad::test_assembler::Section { + public: + typedef dwarf2reader::DwarfTag DwarfTag; + typedef dwarf2reader::DwarfAttribute DwarfAttribute; + typedef dwarf2reader::DwarfForm DwarfForm; + typedef dwarf2reader::DwarfHasChild DwarfHasChild; + typedef google_breakpad::test_assembler::Label Label; + + // Start a new abbreviation table entry for abbreviation code |code|, + // encoding a DIE whose tag is |tag|, and which has children if and only + // if |has_children| is true. + TestAbbrevTable &Abbrev(int code, DwarfTag tag, DwarfHasChild has_children) { + assert(code != 0); + ULEB128(code); + ULEB128(static_cast<unsigned>(tag)); + D8(static_cast<unsigned>(has_children)); + return *this; + }; + + // Add an attribute to the current abbreviation code whose name is |name| + // and whose form is |form|. + TestAbbrevTable &Attribute(DwarfAttribute name, DwarfForm form) { + ULEB128(static_cast<unsigned>(name)); + ULEB128(static_cast<unsigned>(form)); + return *this; + } + + // Finish the current abbreviation code. + TestAbbrevTable &EndAbbrev() { + ULEB128(0); + ULEB128(0); + return *this; + } + + // Finish the current abbreviation table. + TestAbbrevTable &EndTable() { + ULEB128(0); + return *this; + } +}; + +#endif // COMMON_DWARF_DWARF2READER_TEST_COMMON_H__ diff --git a/3rdParty/Breakpad/src/common/dwarf/elf_reader.cc b/3rdParty/Breakpad/src/common/dwarf/elf_reader.cc new file mode 100644 index 0000000..4135a51 --- /dev/null +++ b/3rdParty/Breakpad/src/common/dwarf/elf_reader.cc @@ -0,0 +1,1273 @@ +// Copyright 2005 Google Inc. All Rights Reserved. +// Author: chatham@google.com (Andrew Chatham) +// Author: satorux@google.com (Satoru Takabayashi) +// +// Code for reading in ELF files. +// +// For information on the ELF format, see +// http://www.x86.org/ftp/manuals/tools/elf.pdf +// +// I also liked: +// http://www.caldera.com/developers/gabi/1998-04-29/contents.html +// +// A note about types: When dealing with the file format, we use types +// like Elf32_Word, but in the public interfaces we treat all +// addresses as uint64. As a result, we should be able to symbolize +// 64-bit binaries from a 32-bit process (which we don't do, +// anyway). size_t should therefore be avoided, except where required +// by things like mmap(). +// +// Although most of this code can deal with arbitrary ELF files of +// either word size, the public ElfReader interface only examines +// files loaded into the current address space, which must all match +// __WORDSIZE. This code cannot handle ELF files with a non-native +// byte ordering. +// +// TODO(chatham): It would be nice if we could accomplish this task +// without using malloc(), so we could use it as the process is dying. + +#ifndef _GNU_SOURCE +#define _GNU_SOURCE // needed for pread() +#endif + +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/mman.h> +#include <unistd.h> +#include <fcntl.h> +#include <string.h> + +#include <algorithm> +#include <map> +#include <string> +#include <vector> +// TODO(saugustine): Add support for compressed debug. +// Also need to add configure tests for zlib. +//#include "zlib.h" + +#include "third_party/musl/include/elf.h" +#include "elf_reader.h" +#include "common/using_std_string.h" + +// EM_AARCH64 is not defined by elf.h of GRTE v3 on x86. +// TODO(dougkwan): Remove this when v17 is retired. +#if !defined(EM_AARCH64) +#define EM_AARCH64 183 /* ARM AARCH64 */ +#endif + +// Map Linux macros to their Apple equivalents. +#if __APPLE__ +#ifndef __LITTLE_ENDIAN +#define __LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__ +#endif // __LITTLE_ENDIAN +#ifndef __BIG_ENDIAN +#define __BIG_ENDIAN __ORDER_BIG_ENDIAN__ +#endif // __BIG_ENDIAN +#ifndef __BYTE_ORDER +#define __BYTE_ORDER __BYTE_ORDER__ +#endif // __BYTE_ORDER +#endif // __APPLE__ + +// TODO(dthomson): Can be removed once all Java code is using the Google3 +// launcher. We need to avoid processing PLT functions as it causes memory +// fragmentation in malloc, which is fixed in tcmalloc - and if the Google3 +// launcher is used the JVM will then use tcmalloc. b/13735638 +//DEFINE_bool(elfreader_process_dynsyms, true, +// "Activate PLT function processing"); + +using std::vector; + +namespace { + +// The lowest bit of an ARM symbol value is used to indicate a Thumb address. +const int kARMThumbBitOffset = 0; + +// Converts an ARM Thumb symbol value to a true aligned address value. +template <typename T> +T AdjustARMThumbSymbolValue(const T& symbol_table_value) { + return symbol_table_value & ~(1 << kARMThumbBitOffset); +} + +// Names of PLT-related sections. +const char kElfPLTRelSectionName[] = ".rel.plt"; // Use Rel struct. +const char kElfPLTRelaSectionName[] = ".rela.plt"; // Use Rela struct. +const char kElfPLTSectionName[] = ".plt"; +const char kElfDynSymSectionName[] = ".dynsym"; + +const int kX86PLTCodeSize = 0x10; // Size of one x86 PLT function in bytes. +const int kARMPLTCodeSize = 0xc; +const int kAARCH64PLTCodeSize = 0x10; + +const int kX86PLT0Size = 0x10; // Size of the special PLT0 entry. +const int kARMPLT0Size = 0x14; +const int kAARCH64PLT0Size = 0x20; + +// Suffix for PLT functions when it needs to be explicitly identified as such. +const char kPLTFunctionSuffix[] = "@plt"; + +} // namespace + +namespace dwarf2reader { + +template <class ElfArch> class ElfReaderImpl; + +// 32-bit and 64-bit ELF files are processed exactly the same, except +// for various field sizes. Elf32 and Elf64 encompass all of the +// differences between the two formats, and all format-specific code +// in this file is templated on one of them. +class Elf32 { + public: + typedef Elf32_Ehdr Ehdr; + typedef Elf32_Shdr Shdr; + typedef Elf32_Phdr Phdr; + typedef Elf32_Word Word; + typedef Elf32_Sym Sym; + typedef Elf32_Rel Rel; + typedef Elf32_Rela Rela; + + // What should be in the EI_CLASS header. + static const int kElfClass = ELFCLASS32; + + // Given a symbol pointer, return the binding type (eg STB_WEAK). + static char Bind(const Elf32_Sym *sym) { + return ELF32_ST_BIND(sym->st_info); + } + // Given a symbol pointer, return the symbol type (eg STT_FUNC). + static char Type(const Elf32_Sym *sym) { + return ELF32_ST_TYPE(sym->st_info); + } + + // Extract the symbol index from the r_info field of a relocation. + static int r_sym(const Elf32_Word r_info) { + return ELF32_R_SYM(r_info); + } +}; + + +class Elf64 { + public: + typedef Elf64_Ehdr Ehdr; + typedef Elf64_Shdr Shdr; + typedef Elf64_Phdr Phdr; + typedef Elf64_Word Word; + typedef Elf64_Sym Sym; + typedef Elf64_Rel Rel; + typedef Elf64_Rela Rela; + + // What should be in the EI_CLASS header. + static const int kElfClass = ELFCLASS64; + + static char Bind(const Elf64_Sym *sym) { + return ELF64_ST_BIND(sym->st_info); + } + static char Type(const Elf64_Sym *sym) { + return ELF64_ST_TYPE(sym->st_info); + } + static int r_sym(const Elf64_Xword r_info) { + return ELF64_R_SYM(r_info); + } +}; + + +// ElfSectionReader mmaps a section of an ELF file ("section" is ELF +// terminology). The ElfReaderImpl object providing the section header +// must exist for the lifetime of this object. +// +// The motivation for mmaping individual sections of the file is that +// many Google executables are large enough when unstripped that we +// have to worry about running out of virtual address space. +// +// For compressed sections we have no choice but to allocate memory. +template<class ElfArch> +class ElfSectionReader { + public: + ElfSectionReader(const char *name, const string &path, int fd, + const typename ElfArch::Shdr §ion_header) + : contents_aligned_(NULL), + contents_(NULL), + header_(section_header) { + // Back up to the beginning of the page we're interested in. + const size_t additional = header_.sh_offset % getpagesize(); + const size_t offset_aligned = header_.sh_offset - additional; + section_size_ = header_.sh_size; + size_aligned_ = section_size_ + additional; + // If the section has been stripped or is empty, do not attempt + // to process its contents. + if (header_.sh_type == SHT_NOBITS || header_.sh_size == 0) + return; + contents_aligned_ = mmap(NULL, size_aligned_, PROT_READ, MAP_SHARED, + fd, offset_aligned); + // Set where the offset really should begin. + contents_ = reinterpret_cast<char *>(contents_aligned_) + + (header_.sh_offset - offset_aligned); + + // Check for and handle any compressed contents. + //if (strncmp(name, ".zdebug_", strlen(".zdebug_")) == 0) + // DecompressZlibContents(); + // TODO(saugustine): Add support for proposed elf-section flag + // "SHF_COMPRESS". + } + + ~ElfSectionReader() { + if (contents_aligned_ != NULL) + munmap(contents_aligned_, size_aligned_); + else + delete[] contents_; + } + + // Return the section header for this section. + typename ElfArch::Shdr const &header() const { return header_; } + + // Return memory at the given offset within this section. + const char *GetOffset(typename ElfArch::Word bytes) const { + return contents_ + bytes; + } + + const char *contents() const { return contents_; } + size_t section_size() const { return section_size_; } + + private: + // page-aligned file contents + void *contents_aligned_; + // contents as usable by the client. For non-compressed sections, + // pointer within contents_aligned_ to where the section data + // begins; for compressed sections, pointer to the decompressed + // data. + char *contents_; + // size of contents_aligned_ + size_t size_aligned_; + // size of contents. + size_t section_size_; + const typename ElfArch::Shdr header_; +}; + +// An iterator over symbols in a given section. It handles walking +// through the entries in the specified section and mapping symbol +// entries to their names in the appropriate string table (in +// another section). +template<class ElfArch> +class SymbolIterator { + public: + SymbolIterator(ElfReaderImpl<ElfArch> *reader, + typename ElfArch::Word section_type) + : symbol_section_(reader->GetSectionByType(section_type)), + string_section_(NULL), + num_symbols_in_section_(0), + symbol_within_section_(0) { + + // If this section type doesn't exist, leave + // num_symbols_in_section_ as zero, so this iterator is already + // done(). + if (symbol_section_ != NULL) { + num_symbols_in_section_ = symbol_section_->header().sh_size / + symbol_section_->header().sh_entsize; + + // Symbol sections have sh_link set to the section number of + // the string section containing the symbol names. + string_section_ = reader->GetSection(symbol_section_->header().sh_link); + } + } + + // Return true iff we have passed all symbols in this section. + bool done() const { + return symbol_within_section_ >= num_symbols_in_section_; + } + + // Advance to the next symbol in this section. + // REQUIRES: !done() + void Next() { ++symbol_within_section_; } + + // Return a pointer to the current symbol. + // REQUIRES: !done() + const typename ElfArch::Sym *GetSymbol() const { + return reinterpret_cast<const typename ElfArch::Sym*>( + symbol_section_->GetOffset(symbol_within_section_ * + symbol_section_->header().sh_entsize)); + } + + // Return the name of the current symbol, NULL if it has none. + // REQUIRES: !done() + const char *GetSymbolName() const { + int name_offset = GetSymbol()->st_name; + if (name_offset == 0) + return NULL; + return string_section_->GetOffset(name_offset); + } + + int GetCurrentSymbolIndex() const { + return symbol_within_section_; + } + + private: + const ElfSectionReader<ElfArch> *const symbol_section_; + const ElfSectionReader<ElfArch> *string_section_; + int num_symbols_in_section_; + int symbol_within_section_; +}; + + +// Copied from strings/strutil.h. Per chatham, +// this library should not depend on strings. + +static inline bool MyHasSuffixString(const string& str, const string& suffix) { + int len = str.length(); + int suflen = suffix.length(); + return (suflen <= len) && (str.compare(len-suflen, suflen, suffix) == 0); +} + + +// ElfReader loads an ELF binary and can provide information about its +// contents. It is most useful for matching addresses to function +// names. It does not understand debugging formats (eg dwarf2), so it +// can't print line numbers. It takes a path to an elf file and a +// readable file descriptor for that file, which it does not assume +// ownership of. +template<class ElfArch> +class ElfReaderImpl { + public: + explicit ElfReaderImpl(const string &path, int fd) + : path_(path), + fd_(fd), + section_headers_(NULL), + program_headers_(NULL), + opd_section_(NULL), + base_for_text_(0), + plts_supported_(false), + plt_code_size_(0), + plt0_size_(0), + visited_relocation_entries_(false) { + string error; + is_dwp_ = MyHasSuffixString(path, ".dwp"); + ParseHeaders(fd, path); + // Currently we need some extra information for PowerPC64 binaries + // including a way to read the .opd section for function descriptors and a + // way to find the linked base for function symbols. + if (header_.e_machine == EM_PPC64) { + // "opd_section_" must always be checked for NULL before use. + opd_section_ = GetSectionInfoByName(".opd", &opd_info_); + for (unsigned int k = 0u; k < GetNumSections(); ++k) { + const char *name = GetSectionName(section_headers_[k].sh_name); + if (strncmp(name, ".text", strlen(".text")) == 0) { + base_for_text_ = + section_headers_[k].sh_addr - section_headers_[k].sh_offset; + break; + } + } + } + // Turn on PLTs. + if (header_.e_machine == EM_386 || header_.e_machine == EM_X86_64) { + plt_code_size_ = kX86PLTCodeSize; + plt0_size_ = kX86PLT0Size; + plts_supported_ = true; + } else if (header_.e_machine == EM_ARM) { + plt_code_size_ = kARMPLTCodeSize; + plt0_size_ = kARMPLT0Size; + plts_supported_ = true; + } else if (header_.e_machine == EM_AARCH64) { + plt_code_size_ = kAARCH64PLTCodeSize; + plt0_size_ = kAARCH64PLT0Size; + plts_supported_ = true; + } + } + + ~ElfReaderImpl() { + for (unsigned int i = 0u; i < sections_.size(); ++i) + delete sections_[i]; + delete [] section_headers_; + delete [] program_headers_; + } + + // Examine the headers of the file and return whether the file looks + // like an ELF file for this architecture. Takes an already-open + // file descriptor for the candidate file, reading in the prologue + // to see if the ELF file appears to match the current + // architecture. If error is non-NULL, it will be set with a reason + // in case of failure. + static bool IsArchElfFile(int fd, string *error) { + unsigned char header[EI_NIDENT]; + if (pread(fd, header, sizeof(header), 0) != sizeof(header)) { + if (error != NULL) *error = "Could not read header"; + return false; + } + + if (memcmp(header, ELFMAG, SELFMAG) != 0) { + if (error != NULL) *error = "Missing ELF magic"; + return false; + } + + if (header[EI_CLASS] != ElfArch::kElfClass) { + if (error != NULL) *error = "Different word size"; + return false; + } + + int endian = 0; + if (header[EI_DATA] == ELFDATA2LSB) + endian = __LITTLE_ENDIAN; + else if (header[EI_DATA] == ELFDATA2MSB) + endian = __BIG_ENDIAN; + if (endian != __BYTE_ORDER) { + if (error != NULL) *error = "Different byte order"; + return false; + } + + return true; + } + + // Return true if we can use this symbol in Address-to-Symbol map. + bool CanUseSymbol(const char *name, const typename ElfArch::Sym *sym) { + // For now we only save FUNC and NOTYPE symbols. For now we just + // care about functions, but some functions written in assembler + // don't have a proper ELF type attached to them, so we store + // NOTYPE symbols as well. The remaining significant type is + // OBJECT (eg global variables), which represent about 25% of + // the symbols in a typical google3 binary. + if (ElfArch::Type(sym) != STT_FUNC && + ElfArch::Type(sym) != STT_NOTYPE) { + return false; + } + + // Target specific filtering. + switch (header_.e_machine) { + case EM_AARCH64: + case EM_ARM: + // Filter out '$x' special local symbols used by tools + return name[0] != '$' || ElfArch::Bind(sym) != STB_LOCAL; + case EM_X86_64: + // Filter out read-only constants like .LC123. + return name[0] != '.' || ElfArch::Bind(sym) != STB_LOCAL; + default: + return true; + } + } + + // Iterate over the symbols in a section, either SHT_DYNSYM or + // SHT_SYMTAB. Add all symbols to the given SymbolMap. + /* + void GetSymbolPositions(SymbolMap *symbols, + typename ElfArch::Word section_type, + uint64 mem_offset, + uint64 file_offset) { + // This map is used to filter out "nested" functions. + // See comment below. + AddrToSymMap addr_to_sym_map; + for (SymbolIterator<ElfArch> it(this, section_type); + !it.done(); it.Next()) { + const char *name = it.GetSymbolName(); + if (name == NULL) + continue; + const typename ElfArch::Sym *sym = it.GetSymbol(); + if (CanUseSymbol(name, sym)) { + const int sec = sym->st_shndx; + + // We don't support special section indices. The most common + // is SHN_ABS, for absolute symbols used deep in the bowels of + // glibc. Also ignore any undefined symbols. + if (sec == SHN_UNDEF || + (sec >= SHN_LORESERVE && sec <= SHN_HIRESERVE)) { + continue; + } + + const typename ElfArch::Shdr& hdr = section_headers_[sec]; + + // Adjust for difference between where we expected to mmap + // this section, and where it was actually mmapped. + const int64 expected_base = hdr.sh_addr - hdr.sh_offset; + const int64 real_base = mem_offset - file_offset; + const int64 adjust = real_base - expected_base; + + uint64 start = sym->st_value + adjust; + + // Adjust function symbols for PowerPC64 by dereferencing and adjusting + // the function descriptor to get the function address. + if (header_.e_machine == EM_PPC64 && ElfArch::Type(sym) == STT_FUNC) { + const uint64 opd_addr = + AdjustPPC64FunctionDescriptorSymbolValue(sym->st_value); + // Only adjust the returned value if the function address was found. + if (opd_addr != sym->st_value) { + const int64 adjust_function_symbols = + real_base - base_for_text_; + start = opd_addr + adjust_function_symbols; + } + } + + addr_to_sym_map.push_back(std::make_pair(start, sym)); + } + } + std::sort(addr_to_sym_map.begin(), addr_to_sym_map.end(), &AddrToSymSorter); + addr_to_sym_map.erase(std::unique(addr_to_sym_map.begin(), + addr_to_sym_map.end(), &AddrToSymEquals), + addr_to_sym_map.end()); + + // Squeeze out any "nested functions". + // Nested functions are not allowed in C, but libc plays tricks. + // + // For example, here is disassembly of /lib64/tls/libc-2.3.5.so: + // 0x00000000000aa380 <read+0>: cmpl $0x0,0x2781b9(%rip) + // 0x00000000000aa387 <read+7>: jne 0xaa39b <read+27> + // 0x00000000000aa389 <__read_nocancel+0>: mov $0x0,%rax + // 0x00000000000aa390 <__read_nocancel+7>: syscall + // 0x00000000000aa392 <__read_nocancel+9>: cmp $0xfffffffffffff001,%rax + // 0x00000000000aa398 <__read_nocancel+15>: jae 0xaa3ef <read+111> + // 0x00000000000aa39a <__read_nocancel+17>: retq + // 0x00000000000aa39b <read+27>: sub $0x28,%rsp + // 0x00000000000aa39f <read+31>: mov %rdi,0x8(%rsp) + // ... + // Without removing __read_nocancel, symbolizer will return NULL + // given e.g. 0xaa39f (because the lower bound is __read_nocancel, + // but 0xaa39f is beyond its end. + if (addr_to_sym_map.empty()) { + return; + } + const ElfSectionReader<ElfArch> *const symbol_section = + this->GetSectionByType(section_type); + const ElfSectionReader<ElfArch> *const string_section = + this->GetSection(symbol_section->header().sh_link); + + typename AddrToSymMap::iterator curr = addr_to_sym_map.begin(); + // Always insert the first symbol. + symbols->AddSymbol(string_section->GetOffset(curr->second->st_name), + curr->first, curr->second->st_size); + typename AddrToSymMap::iterator prev = curr++; + for (; curr != addr_to_sym_map.end(); ++curr) { + const uint64 prev_addr = prev->first; + const uint64 curr_addr = curr->first; + const typename ElfArch::Sym *const prev_sym = prev->second; + const typename ElfArch::Sym *const curr_sym = curr->second; + if (prev_addr + prev_sym->st_size <= curr_addr || + // The next condition is true if two symbols overlap like this: + // + // Previous symbol |----------------------------| + // Current symbol |-------------------------------| + // + // These symbols are not found in google3 codebase, but in + // jdk1.6.0_01_gg1/jre/lib/i386/server/libjvm.so. + // + // 0619e040 00000046 t CardTableModRefBS::write_region_work() + // 0619e070 00000046 t CardTableModRefBS::write_ref_array_work() + // + // We allow overlapped symbols rather than ignore these. + // Due to the way SymbolMap::GetSymbolAtPosition() works, + // lookup for any address in [curr_addr, curr_addr + its size) + // (e.g. 0619e071) will produce the current symbol, + // which is the desired outcome. + prev_addr + prev_sym->st_size < curr_addr + curr_sym->st_size) { + const char *name = string_section->GetOffset(curr_sym->st_name); + symbols->AddSymbol(name, curr_addr, curr_sym->st_size); + prev = curr; + } else { + // Current symbol is "nested" inside previous one like this: + // + // Previous symbol |----------------------------| + // Current symbol |---------------------| + // + // This happens within glibc, e.g. __read_nocancel is nested + // "inside" __read. Ignore "inner" symbol. + //DCHECK_LE(curr_addr + curr_sym->st_size, + // prev_addr + prev_sym->st_size); + ; + } + } + } +*/ + + void VisitSymbols(typename ElfArch::Word section_type, + ElfReader::SymbolSink *sink) { + VisitSymbols(section_type, sink, -1, -1, false); + } + + void VisitSymbols(typename ElfArch::Word section_type, + ElfReader::SymbolSink *sink, + int symbol_binding, + int symbol_type, + bool get_raw_symbol_values) { + for (SymbolIterator<ElfArch> it(this, section_type); + !it.done(); it.Next()) { + const char *name = it.GetSymbolName(); + if (!name) continue; + const typename ElfArch::Sym *sym = it.GetSymbol(); + if ((symbol_binding < 0 || ElfArch::Bind(sym) == symbol_binding) && + (symbol_type < 0 || ElfArch::Type(sym) == symbol_type)) { + typename ElfArch::Sym symbol = *sym; + // Add a PLT symbol in addition to the main undefined symbol. + // Only do this for SHT_DYNSYM, because PLT symbols are dynamic. + int symbol_index = it.GetCurrentSymbolIndex(); + // TODO(dthomson): Can be removed once all Java code is using the + // Google3 launcher. + if (section_type == SHT_DYNSYM && + static_cast<unsigned int>(symbol_index) < symbols_plt_offsets_.size() && + symbols_plt_offsets_[symbol_index] != 0) { + string plt_name = string(name) + kPLTFunctionSuffix; + if (plt_function_names_[symbol_index].empty()) { + plt_function_names_[symbol_index] = plt_name; + } else if (plt_function_names_[symbol_index] != plt_name) { + ; + } + sink->AddSymbol(plt_function_names_[symbol_index].c_str(), + symbols_plt_offsets_[it.GetCurrentSymbolIndex()], + plt_code_size_); + } + if (!get_raw_symbol_values) + AdjustSymbolValue(&symbol); + sink->AddSymbol(name, symbol.st_value, symbol.st_size); + } + } + } + + void VisitRelocationEntries() { + if (visited_relocation_entries_) { + return; + } + visited_relocation_entries_ = true; + + if (!plts_supported_) { + return; + } + // First determine if PLTs exist. If not, then there is nothing to do. + ElfReader::SectionInfo plt_section_info; + const char* plt_section = + GetSectionInfoByName(kElfPLTSectionName, &plt_section_info); + if (!plt_section) { + return; + } + if (plt_section_info.size == 0) { + return; + } + + // The PLTs could be referenced by either a Rel or Rela (Rel with Addend) + // section. + ElfReader::SectionInfo rel_section_info; + ElfReader::SectionInfo rela_section_info; + const char* rel_section = + GetSectionInfoByName(kElfPLTRelSectionName, &rel_section_info); + const char* rela_section = + GetSectionInfoByName(kElfPLTRelaSectionName, &rela_section_info); + + const typename ElfArch::Rel* rel = + reinterpret_cast<const typename ElfArch::Rel*>(rel_section); + const typename ElfArch::Rela* rela = + reinterpret_cast<const typename ElfArch::Rela*>(rela_section); + + if (!rel_section && !rela_section) { + return; + } + + // Use either Rel or Rela section, depending on which one exists. + size_t section_size = rel_section ? rel_section_info.size + : rela_section_info.size; + size_t entry_size = rel_section ? sizeof(typename ElfArch::Rel) + : sizeof(typename ElfArch::Rela); + + // Determine the number of entries in the dynamic symbol table. + ElfReader::SectionInfo dynsym_section_info; + const char* dynsym_section = + GetSectionInfoByName(kElfDynSymSectionName, &dynsym_section_info); + // The dynsym section might not exist, or it might be empty. In either case + // there is nothing to be done so return. + if (!dynsym_section || dynsym_section_info.size == 0) { + return; + } + size_t num_dynamic_symbols = + dynsym_section_info.size / dynsym_section_info.entsize; + symbols_plt_offsets_.resize(num_dynamic_symbols, 0); + + // TODO(dthomson): Can be removed once all Java code is using the + // Google3 launcher. + // Make storage room for PLT function name strings. + plt_function_names_.resize(num_dynamic_symbols); + + for (size_t i = 0; i < section_size / entry_size; ++i) { + // Determine symbol index from the |r_info| field. + int sym_index = ElfArch::r_sym(rel_section ? rel[i].r_info + : rela[i].r_info); + if (static_cast<unsigned int>(sym_index) >= symbols_plt_offsets_.size()) { + continue; + } + symbols_plt_offsets_[sym_index] = + plt_section_info.addr + plt0_size_ + i * plt_code_size_; + } + } + + // Return an ElfSectionReader for the first section of the given + // type by iterating through all section headers. Returns NULL if + // the section type is not found. + const ElfSectionReader<ElfArch> *GetSectionByType( + typename ElfArch::Word section_type) { + for (unsigned int k = 0u; k < GetNumSections(); ++k) { + if (section_headers_[k].sh_type == section_type) { + return GetSection(k); + } + } + return NULL; + } + + // Return the name of section "shndx". Returns NULL if the section + // is not found. + const char *GetSectionNameByIndex(int shndx) { + return GetSectionName(section_headers_[shndx].sh_name); + } + + // Return a pointer to section "shndx", and store the size in + // "size". Returns NULL if the section is not found. + const char *GetSectionContentsByIndex(int shndx, size_t *size) { + const ElfSectionReader<ElfArch> *section = GetSection(shndx); + if (section != NULL) { + *size = section->section_size(); + return section->contents(); + } + return NULL; + } + + // Return a pointer to the first section of the given name by + // iterating through all section headers, and store the size in + // "size". Returns NULL if the section name is not found. + const char *GetSectionContentsByName(const string §ion_name, + size_t *size) { + for (unsigned int k = 0u; k < GetNumSections(); ++k) { + // When searching for sections in a .dwp file, the sections + // we're looking for will always be at the end of the section + // table, so reverse the direction of iteration. + int shndx = is_dwp_ ? GetNumSections() - k - 1 : k; + const char *name = GetSectionName(section_headers_[shndx].sh_name); + if (name != NULL && ElfReader::SectionNamesMatch(section_name, name)) { + const ElfSectionReader<ElfArch> *section = GetSection(shndx); + if (section == NULL) { + return NULL; + } else { + *size = section->section_size(); + return section->contents(); + } + } + } + return NULL; + } + + // This is like GetSectionContentsByName() but it returns a lot of extra + // information about the section. + const char *GetSectionInfoByName(const string §ion_name, + ElfReader::SectionInfo *info) { + for (unsigned int k = 0u; k < GetNumSections(); ++k) { + // When searching for sections in a .dwp file, the sections + // we're looking for will always be at the end of the section + // table, so reverse the direction of iteration. + int shndx = is_dwp_ ? GetNumSections() - k - 1 : k; + const char *name = GetSectionName(section_headers_[shndx].sh_name); + if (name != NULL && ElfReader::SectionNamesMatch(section_name, name)) { + const ElfSectionReader<ElfArch> *section = GetSection(shndx); + if (section == NULL) { + return NULL; + } else { + info->type = section->header().sh_type; + info->flags = section->header().sh_flags; + info->addr = section->header().sh_addr; + info->offset = section->header().sh_offset; + info->size = section->header().sh_size; + info->link = section->header().sh_link; + info->info = section->header().sh_info; + info->addralign = section->header().sh_addralign; + info->entsize = section->header().sh_entsize; + return section->contents(); + } + } + } + return NULL; + } + + // p_vaddr of the first PT_LOAD segment (if any), or 0 if no PT_LOAD + // segments are present. This is the address an ELF image was linked + // (by static linker) to be loaded at. Usually (but not always) 0 for + // shared libraries and position-independent executables. + uint64 VaddrOfFirstLoadSegment() const { + // Relocatable objects (of type ET_REL) do not have LOAD segments. + if (header_.e_type == ET_REL) { + return 0; + } + for (int i = 0; i < GetNumProgramHeaders(); ++i) { + if (program_headers_[i].p_type == PT_LOAD) { + return program_headers_[i].p_vaddr; + } + } + return 0; + } + + // According to the LSB ("ELF special sections"), sections with debug + // info are prefixed by ".debug". The names are not specified, but they + // look like ".debug_line", ".debug_info", etc. + bool HasDebugSections() { + // Debug sections are likely to be near the end, so reverse the + // direction of iteration. + for (int k = GetNumSections() - 1; k >= 0; --k) { + const char *name = GetSectionName(section_headers_[k].sh_name); + if (strncmp(name, ".debug", strlen(".debug")) == 0) return true; + if (strncmp(name, ".zdebug", strlen(".zdebug")) == 0) return true; + } + return false; + } + + bool IsDynamicSharedObject() const { + return header_.e_type == ET_DYN; + } + + // Return the number of sections. + uint64_t GetNumSections() const { + if (HasManySections()) + return first_section_header_.sh_size; + return header_.e_shnum; + } + + private: + typedef vector<pair<uint64, const typename ElfArch::Sym *> > AddrToSymMap; + + static bool AddrToSymSorter(const typename AddrToSymMap::value_type& lhs, + const typename AddrToSymMap::value_type& rhs) { + return lhs.first < rhs.first; + } + + static bool AddrToSymEquals(const typename AddrToSymMap::value_type& lhs, + const typename AddrToSymMap::value_type& rhs) { + return lhs.first == rhs.first; + } + + // Does this ELF file have too many sections to fit in the program header? + bool HasManySections() const { + return header_.e_shnum == SHN_UNDEF; + } + + // Return the number of program headers. + int GetNumProgramHeaders() const { + if (HasManySections() && header_.e_phnum == 0xffff && + first_section_header_.sh_info != 0) + return first_section_header_.sh_info; + return header_.e_phnum; + } + + // Return the index of the string table. + int GetStringTableIndex() const { + if (HasManySections()) { + if (header_.e_shstrndx == 0xffff) + return first_section_header_.sh_link; + else if (header_.e_shstrndx >= GetNumSections()) + return 0; + } + return header_.e_shstrndx; + } + + // Given an offset into the section header string table, return the + // section name. + const char *GetSectionName(typename ElfArch::Word sh_name) { + const ElfSectionReader<ElfArch> *shstrtab = + GetSection(GetStringTableIndex()); + if (shstrtab != NULL) { + return shstrtab->GetOffset(sh_name); + } + return NULL; + } + + // Return an ElfSectionReader for the given section. The reader will + // be freed when this object is destroyed. + const ElfSectionReader<ElfArch> *GetSection(int num) { + const char *name; + // Hard-coding the name for the section-name string table prevents + // infinite recursion. + if (num == GetStringTableIndex()) + name = ".shstrtab"; + else + name = GetSectionNameByIndex(num); + ElfSectionReader<ElfArch> *& reader = sections_[num]; + if (reader == NULL) + reader = new ElfSectionReader<ElfArch>(name, path_, fd_, + section_headers_[num]); + return reader; + } + + // Parse out the overall header information from the file and assert + // that it looks sane. This contains information like the magic + // number and target architecture. + bool ParseHeaders(int fd, const string &path) { + // Read in the global ELF header. + if (pread(fd, &header_, sizeof(header_), 0) != sizeof(header_)) { + return false; + } + + // Must be an executable, dynamic shared object or relocatable object + if (header_.e_type != ET_EXEC && + header_.e_type != ET_DYN && + header_.e_type != ET_REL) { + return false; + } + // Need a section header. + if (header_.e_shoff == 0) { + return false; + } + + if (header_.e_shnum == SHN_UNDEF) { + // The number of sections in the program header is only a 16-bit value. In + // the event of overflow (greater than SHN_LORESERVE sections), e_shnum + // will read SHN_UNDEF and the true number of section header table entries + // is found in the sh_size field of the first section header. + // See: http://www.sco.com/developers/gabi/2003-12-17/ch4.sheader.html + if (pread(fd, &first_section_header_, sizeof(first_section_header_), + header_.e_shoff) != sizeof(first_section_header_)) { + return false; + } + } + + // Dynamically allocate enough space to store the section headers + // and read them out of the file. + const int section_headers_size = + GetNumSections() * sizeof(*section_headers_); + section_headers_ = new typename ElfArch::Shdr[section_headers_size]; + if (pread(fd, section_headers_, section_headers_size, header_.e_shoff) != + section_headers_size) { + return false; + } + + // Dynamically allocate enough space to store the program headers + // and read them out of the file. + //const int program_headers_size = + // GetNumProgramHeaders() * sizeof(*program_headers_); + program_headers_ = new typename ElfArch::Phdr[GetNumProgramHeaders()]; + + // Presize the sections array for efficiency. + sections_.resize(GetNumSections(), NULL); + return true; + } + + // Given the "value" of a function descriptor return the address of the + // function (i.e. the dereferenced value). Otherwise return "value". + uint64 AdjustPPC64FunctionDescriptorSymbolValue(uint64 value) { + if (opd_section_ != NULL && + opd_info_.addr <= value && + value < opd_info_.addr + opd_info_.size) { + uint64 offset = value - opd_info_.addr; + return (*reinterpret_cast<const uint64*>(opd_section_ + offset)); + } + return value; + } + + void AdjustSymbolValue(typename ElfArch::Sym* sym) { + switch (header_.e_machine) { + case EM_ARM: + // For ARM architecture, if the LSB of the function symbol offset is set, + // it indicates a Thumb function. This bit should not be taken literally. + // Clear it. + if (ElfArch::Type(sym) == STT_FUNC) + sym->st_value = AdjustARMThumbSymbolValue(sym->st_value); + break; + case EM_386: + // No adjustment needed for Intel x86 architecture. However, explicitly + // define this case as we use it quite often. + break; + case EM_PPC64: + // PowerPC64 currently has function descriptors as part of the ABI. + // Function symbols need to be adjusted accordingly. + if (ElfArch::Type(sym) == STT_FUNC) + sym->st_value = AdjustPPC64FunctionDescriptorSymbolValue(sym->st_value); + break; + default: + break; + } + } + + friend class SymbolIterator<ElfArch>; + + // The file we're reading. + const string path_; + // Open file descriptor for path_. Not owned by this object. + const int fd_; + + // The global header of the ELF file. + typename ElfArch::Ehdr header_; + + // The header of the first section. This may be used to supplement the ELF + // file header. + typename ElfArch::Shdr first_section_header_; + + // Array of GetNumSections() section headers, allocated when we read + // in the global header. + typename ElfArch::Shdr *section_headers_; + + // Array of GetNumProgramHeaders() program headers, allocated when we read + // in the global header. + typename ElfArch::Phdr *program_headers_; + + // An array of pointers to ElfSectionReaders. Sections are + // mmaped as they're needed and not released until this object is + // destroyed. + vector<ElfSectionReader<ElfArch>*> sections_; + + // For PowerPC64 we need to keep track of function descriptors when looking up + // values for funtion symbols values. Function descriptors are kept in the + // .opd section and are dereferenced to find the function address. + ElfReader::SectionInfo opd_info_; + const char *opd_section_; // Must be checked for NULL before use. + int64 base_for_text_; + + // Read PLT-related sections for the current architecture. + bool plts_supported_; + // Code size of each PLT function for the current architecture. + size_t plt_code_size_; + // Size of the special first entry in the .plt section that calls the runtime + // loader resolution routine, and that all other entries jump to when doing + // lazy symbol binding. + size_t plt0_size_; + + // Maps a dynamic symbol index to a PLT offset. + // The vector entry index is the dynamic symbol index. + std::vector<uint64> symbols_plt_offsets_; + + // Container for PLT function name strings. These strings are passed by + // reference to SymbolSink::AddSymbol() so they need to be stored somewhere. + std::vector<string> plt_function_names_; + + bool visited_relocation_entries_; + + // True if this is a .dwp file. + bool is_dwp_; +}; + +ElfReader::ElfReader(const string &path) + : path_(path), fd_(-1), impl32_(NULL), impl64_(NULL) { + // linux 2.6.XX kernel can show deleted files like this: + // /var/run/nscd/dbYLJYaE (deleted) + // and the kernel-supplied vdso and vsyscall mappings like this: + // [vdso] + // [vsyscall] + if (MyHasSuffixString(path, " (deleted)")) + return; + if (path == "[vdso]") + return; + if (path == "[vsyscall]") + return; + + fd_ = open(path.c_str(), O_RDONLY); +} + +ElfReader::~ElfReader() { + if (fd_ != -1) + close(fd_); + if (impl32_ != NULL) + delete impl32_; + if (impl64_ != NULL) + delete impl64_; +} + + +// The only word-size specific part of this file is IsNativeElfFile(). +#if __WORDSIZE == 32 +#define NATIVE_ELF_ARCH Elf32 +#elif __WORDSIZE == 64 +#define NATIVE_ELF_ARCH Elf64 +#else +#error "Invalid word size" +#endif + +template <typename ElfArch> +static bool IsElfFile(const int fd, const string &path) { + if (fd < 0) + return false; + if (!ElfReaderImpl<ElfArch>::IsArchElfFile(fd, NULL)) { + // No error message here. IsElfFile gets called many times. + return false; + } + return true; +} + +bool ElfReader::IsNativeElfFile() const { + return IsElfFile<NATIVE_ELF_ARCH>(fd_, path_); +} + +bool ElfReader::IsElf32File() const { + return IsElfFile<Elf32>(fd_, path_); +} + +bool ElfReader::IsElf64File() const { + return IsElfFile<Elf64>(fd_, path_); +} + +/* +void ElfReader::AddSymbols(SymbolMap *symbols, + uint64 mem_offset, uint64 file_offset, + uint64 length) { + if (fd_ < 0) + return; + // TODO(chatham): Actually use the information about file offset and + // the length of the mapped section. On some machines the data + // section gets mapped as executable, and we'll end up reading the + // file twice and getting some of the offsets wrong. + if (IsElf32File()) { + GetImpl32()->GetSymbolPositions(symbols, SHT_SYMTAB, + mem_offset, file_offset); + GetImpl32()->GetSymbolPositions(symbols, SHT_DYNSYM, + mem_offset, file_offset); + } else if (IsElf64File()) { + GetImpl64()->GetSymbolPositions(symbols, SHT_SYMTAB, + mem_offset, file_offset); + GetImpl64()->GetSymbolPositions(symbols, SHT_DYNSYM, + mem_offset, file_offset); + } +} +*/ + +void ElfReader::VisitSymbols(ElfReader::SymbolSink *sink) { + VisitSymbols(sink, -1, -1); +} + +void ElfReader::VisitSymbols(ElfReader::SymbolSink *sink, + int symbol_binding, + int symbol_type) { + VisitSymbols(sink, symbol_binding, symbol_type, false); +} + +void ElfReader::VisitSymbols(ElfReader::SymbolSink *sink, + int symbol_binding, + int symbol_type, + bool get_raw_symbol_values) { + if (IsElf32File()) { + GetImpl32()->VisitRelocationEntries(); + GetImpl32()->VisitSymbols(SHT_SYMTAB, sink, symbol_binding, symbol_type, + get_raw_symbol_values); + GetImpl32()->VisitSymbols(SHT_DYNSYM, sink, symbol_binding, symbol_type, + get_raw_symbol_values); + } else if (IsElf64File()) { + GetImpl64()->VisitRelocationEntries(); + GetImpl64()->VisitSymbols(SHT_SYMTAB, sink, symbol_binding, symbol_type, + get_raw_symbol_values); + GetImpl64()->VisitSymbols(SHT_DYNSYM, sink, symbol_binding, symbol_type, + get_raw_symbol_values); + } +} + +uint64 ElfReader::VaddrOfFirstLoadSegment() { + if (IsElf32File()) { + return GetImpl32()->VaddrOfFirstLoadSegment(); + } else if (IsElf64File()) { + return GetImpl64()->VaddrOfFirstLoadSegment(); + } else { + return 0; + } +} + +const char *ElfReader::GetSectionName(int shndx) { + if (shndx < 0 || static_cast<unsigned int>(shndx) >= GetNumSections()) return NULL; + if (IsElf32File()) { + return GetImpl32()->GetSectionNameByIndex(shndx); + } else if (IsElf64File()) { + return GetImpl64()->GetSectionNameByIndex(shndx); + } else { + return NULL; + } +} + +uint64 ElfReader::GetNumSections() { + if (IsElf32File()) { + return GetImpl32()->GetNumSections(); + } else if (IsElf64File()) { + return GetImpl64()->GetNumSections(); + } else { + return 0; + } +} + +const char *ElfReader::GetSectionByIndex(int shndx, size_t *size) { + if (IsElf32File()) { + return GetImpl32()->GetSectionContentsByIndex(shndx, size); + } else if (IsElf64File()) { + return GetImpl64()->GetSectionContentsByIndex(shndx, size); + } else { + return NULL; + } +} + +const char *ElfReader::GetSectionByName(const string §ion_name, + size_t *size) { + if (IsElf32File()) { + return GetImpl32()->GetSectionContentsByName(section_name, size); + } else if (IsElf64File()) { + return GetImpl64()->GetSectionContentsByName(section_name, size); + } else { + return NULL; + } +} + +const char *ElfReader::GetSectionInfoByName(const string §ion_name, + SectionInfo *info) { + if (IsElf32File()) { + return GetImpl32()->GetSectionInfoByName(section_name, info); + } else if (IsElf64File()) { + return GetImpl64()->GetSectionInfoByName(section_name, info); + } else { + return NULL; + } +} + +bool ElfReader::SectionNamesMatch(const string &name, const string &sh_name) { + if ((name.find(".debug_", 0) == 0) && (sh_name.find(".zdebug_", 0) == 0)) { + const string name_suffix(name, strlen(".debug_")); + const string sh_name_suffix(sh_name, strlen(".zdebug_")); + return name_suffix == sh_name_suffix; + } + return name == sh_name; +} + +bool ElfReader::IsDynamicSharedObject() { + if (IsElf32File()) { + return GetImpl32()->IsDynamicSharedObject(); + } else if (IsElf64File()) { + return GetImpl64()->IsDynamicSharedObject(); + } else { + return false; + } +} + +ElfReaderImpl<Elf32> *ElfReader::GetImpl32() { + if (impl32_ == NULL) { + impl32_ = new ElfReaderImpl<Elf32>(path_, fd_); + } + return impl32_; +} + +ElfReaderImpl<Elf64> *ElfReader::GetImpl64() { + if (impl64_ == NULL) { + impl64_ = new ElfReaderImpl<Elf64>(path_, fd_); + } + return impl64_; +} + +// Return true if file is an ELF binary of ElfArch, with unstripped +// debug info (debug_only=true) or symbol table (debug_only=false). +// Otherwise, return false. +template <typename ElfArch> +static bool IsNonStrippedELFBinaryImpl(const string &path, const int fd, + bool debug_only) { + if (!ElfReaderImpl<ElfArch>::IsArchElfFile(fd, NULL)) return false; + ElfReaderImpl<ElfArch> elf_reader(path, fd); + return debug_only ? + elf_reader.HasDebugSections() + : (elf_reader.GetSectionByType(SHT_SYMTAB) != NULL); +} + +// Helper for the IsNon[Debug]StrippedELFBinary functions. +static bool IsNonStrippedELFBinaryHelper(const string &path, + bool debug_only) { + const int fd = open(path.c_str(), O_RDONLY); + if (fd == -1) { + return false; + } + + if (IsNonStrippedELFBinaryImpl<Elf32>(path, fd, debug_only) || + IsNonStrippedELFBinaryImpl<Elf64>(path, fd, debug_only)) { + close(fd); + return true; + } + close(fd); + return false; +} + +bool ElfReader::IsNonStrippedELFBinary(const string &path) { + return IsNonStrippedELFBinaryHelper(path, false); +} + +bool ElfReader::IsNonDebugStrippedELFBinary(const string &path) { + return IsNonStrippedELFBinaryHelper(path, true); +} +} // namespace dwarf2reader diff --git a/3rdParty/Breakpad/src/common/dwarf/elf_reader.h b/3rdParty/Breakpad/src/common/dwarf/elf_reader.h new file mode 100644 index 0000000..b1bb67a --- /dev/null +++ b/3rdParty/Breakpad/src/common/dwarf/elf_reader.h @@ -0,0 +1,166 @@ +// Copyright 2005 Google Inc. All Rights Reserved. +// Author: chatham@google.com (Andrew Chatham) +// Author: satorux@google.com (Satoru Takabayashi) +// +// ElfReader handles reading in ELF. It can extract symbols from the +// current process, which may be used to symbolize stack traces +// without having to make a potentially dangerous call to fork(). +// +// ElfReader dynamically allocates memory, so it is not appropriate to +// use once the address space might be corrupted, such as during +// process death. +// +// ElfReader supports both 32-bit and 64-bit ELF binaries. + +#ifndef COMMON_DWARF_ELF_READER_H__ +#define COMMON_DWARF_ELF_READER_H__ + +#include <string> +#include <vector> + +#include "common/dwarf/types.h" +#include "common/using_std_string.h" + +using std::vector; +using std::pair; + +namespace dwarf2reader { + +class SymbolMap; +class Elf32; +class Elf64; +template<typename ElfArch> +class ElfReaderImpl; + +class ElfReader { + public: + explicit ElfReader(const string &path); + ~ElfReader(); + + // Parse the ELF prologue of this file and return whether it was + // successfully parsed and matches the word size and byte order of + // the current process. + bool IsNativeElfFile() const; + + // Similar to IsNativeElfFile but checks if it's a 32-bit ELF file. + bool IsElf32File() const; + + // Similar to IsNativeElfFile but checks if it's a 64-bit ELF file. + bool IsElf64File() const; + + // Checks if it's an ELF file of type ET_DYN (shared object file). + bool IsDynamicSharedObject(); + + // Add symbols in the given ELF file into the provided SymbolMap, + // assuming that the file has been loaded into the specified + // offset. + // + // The remaining arguments are typically taken from a + // ProcMapsIterator (base/sysinfo.h) and describe which portions of + // the ELF file are mapped into which parts of memory: + // + // mem_offset - position at which the segment is mapped into memory + // file_offset - offset in the file where the mapping begins + // length - length of the mapped segment + void AddSymbols(SymbolMap *symbols, + uint64 mem_offset, uint64 file_offset, + uint64 length); + + class SymbolSink { + public: + virtual ~SymbolSink() {} + virtual void AddSymbol(const char *name, uint64 address, uint64 size) = 0; + }; + + // Like AddSymbols above, but with no address correction. + // Processes any SHT_SYMTAB section, followed by any SHT_DYNSYM section. + void VisitSymbols(SymbolSink *sink); + + // Like VisitSymbols above, but for a specific symbol binding/type. + // A negative value for the binding and type parameters means any + // binding or type. + void VisitSymbols(SymbolSink *sink, int symbol_binding, int symbol_type); + + // Like VisitSymbols above but can optionally export raw symbol values instead + // of adjusted ones. + void VisitSymbols(SymbolSink *sink, int symbol_binding, int symbol_type, + bool get_raw_symbol_values); + + // p_vaddr of the first PT_LOAD segment (if any), or 0 if no PT_LOAD + // segments are present. This is the address an ELF image was linked + // (by static linker) to be loaded at. Usually (but not always) 0 for + // shared libraries and position-independent executables. + uint64 VaddrOfFirstLoadSegment(); + + // Return the name of section "shndx". Returns NULL if the section + // is not found. + const char *GetSectionName(int shndx); + + // Return the number of sections in the given ELF file. + uint64 GetNumSections(); + + // Get section "shndx" from the given ELF file. On success, return + // the pointer to the section and store the size in "size". + // On error, return NULL. The returned section data is only valid + // until the ElfReader gets destroyed. + const char *GetSectionByIndex(int shndx, size_t *size); + + // Get section with "section_name" (ex. ".text", ".symtab") in the + // given ELF file. On success, return the pointer to the section + // and store the size in "size". On error, return NULL. The + // returned section data is only valid until the ElfReader gets + // destroyed. + const char *GetSectionByName(const string §ion_name, size_t *size); + + // This is like GetSectionByName() but it returns a lot of extra information + // about the section. The SectionInfo structure is almost identical to + // the typedef struct Elf64_Shdr defined in <elf.h>, but is redefined + // here so that the many short macro names in <elf.h> don't have to be + // added to our already cluttered namespace. + struct SectionInfo { + uint32 type; // Section type (SHT_xxx constant from elf.h). + uint64 flags; // Section flags (SHF_xxx constants from elf.h). + uint64 addr; // Section virtual address at execution. + uint64 offset; // Section file offset. + uint64 size; // Section size in bytes. + uint32 link; // Link to another section. + uint32 info; // Additional section information. + uint64 addralign; // Section alignment. + uint64 entsize; // Entry size if section holds a table. + }; + const char *GetSectionInfoByName(const string §ion_name, + SectionInfo *info); + + // Check if "path" is an ELF binary that has not been stripped of symbol + // tables. This function supports both 32-bit and 64-bit ELF binaries. + static bool IsNonStrippedELFBinary(const string &path); + + // Check if "path" is an ELF binary that has not been stripped of debug + // info. Unlike IsNonStrippedELFBinary, this function will return + // false for binaries passed through "strip -S". + static bool IsNonDebugStrippedELFBinary(const string &path); + + // Match a requested section name with the section name as it + // appears in the elf-file, adjusting for compressed debug section + // names. For example, returns true if name == ".debug_abbrev" and + // sh_name == ".zdebug_abbrev" + static bool SectionNamesMatch(const string &name, const string &sh_name); + + private: + // Lazily initialize impl32_ and return it. + ElfReaderImpl<Elf32> *GetImpl32(); + // Ditto for impl64_. + ElfReaderImpl<Elf64> *GetImpl64(); + + // Path of the file we're reading. + const string path_; + // Read-only file descriptor for the file. May be -1 if there was an + // error during open. + int fd_; + ElfReaderImpl<Elf32> *impl32_; + ElfReaderImpl<Elf64> *impl64_; +}; + +} // namespace dwarf2reader + +#endif // COMMON_DWARF_ELF_READER_H__ diff --git a/3rdParty/Breakpad/src/common/dwarf/functioninfo.cc b/3rdParty/Breakpad/src/common/dwarf/functioninfo.cc new file mode 100644 index 0000000..55a255e --- /dev/null +++ b/3rdParty/Breakpad/src/common/dwarf/functioninfo.cc @@ -0,0 +1,231 @@ +// Copyright (c) 2010 Google Inc. All Rights Reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// This is a client for the dwarf2reader to extract function and line +// information from the debug info. + +#include <assert.h> +#include <limits.h> +#include <stdio.h> + +#include <map> +#include <queue> +#include <vector> + +#include "common/dwarf/functioninfo.h" +#include "common/dwarf/bytereader.h" +#include "common/scoped_ptr.h" +#include "common/using_std_string.h" + +using google_breakpad::scoped_ptr; + +namespace dwarf2reader { + +CULineInfoHandler::CULineInfoHandler(std::vector<SourceFileInfo>* files, + std::vector<string>* dirs, + LineMap* linemap):linemap_(linemap), + files_(files), + dirs_(dirs) { + // The dirs and files are 1 indexed, so just make sure we put + // nothing in the 0 vector. + assert(dirs->size() == 0); + assert(files->size() == 0); + dirs->push_back(""); + SourceFileInfo s; + s.name = ""; + s.lowpc = ULLONG_MAX; + files->push_back(s); +} + +void CULineInfoHandler::DefineDir(const string& name, uint32 dir_num) { + // These should never come out of order, actually + assert(dir_num == dirs_->size()); + dirs_->push_back(name); +} + +void CULineInfoHandler::DefineFile(const string& name, + int32 file_num, uint32 dir_num, + uint64 mod_time, uint64 length) { + assert(dir_num >= 0); + assert(dir_num < dirs_->size()); + + // These should never come out of order, actually. + if (file_num == (int32)files_->size() || file_num == -1) { + string dir = dirs_->at(dir_num); + + SourceFileInfo s; + s.lowpc = ULLONG_MAX; + + if (dir == "") { + s.name = name; + } else { + s.name = dir + "/" + name; + } + + files_->push_back(s); + } else { + fprintf(stderr, "error in DefineFile"); + } +} + +void CULineInfoHandler::AddLine(uint64 address, uint64 length, uint32 file_num, + uint32 line_num, uint32 column_num) { + if (file_num < files_->size()) { + linemap_->insert( + std::make_pair(address, + std::make_pair(files_->at(file_num).name.c_str(), + line_num))); + + if (address < files_->at(file_num).lowpc) { + files_->at(file_num).lowpc = address; + } + } else { + fprintf(stderr, "error in AddLine"); + } +} + +bool CUFunctionInfoHandler::StartCompilationUnit(uint64 offset, + uint8 address_size, + uint8 offset_size, + uint64 cu_length, + uint8 dwarf_version) { + current_compilation_unit_offset_ = offset; + return true; +} + + +// For function info, we only care about subprograms and inlined +// subroutines. For line info, the DW_AT_stmt_list lives in the +// compile unit tag. + +bool CUFunctionInfoHandler::StartDIE(uint64 offset, enum DwarfTag tag) { + switch (tag) { + case DW_TAG_subprogram: + case DW_TAG_inlined_subroutine: { + current_function_info_ = new FunctionInfo; + current_function_info_->lowpc = current_function_info_->highpc = 0; + current_function_info_->name = ""; + current_function_info_->line = 0; + current_function_info_->file = ""; + offset_to_funcinfo_->insert(std::make_pair(offset, + current_function_info_)); + }; + // FALLTHROUGH + case DW_TAG_compile_unit: + return true; + default: + return false; + } + return false; +} + +// Only care about the name attribute for functions + +void CUFunctionInfoHandler::ProcessAttributeString(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + const string &data) { + if (current_function_info_) { + if (attr == DW_AT_name) + current_function_info_->name = data; + else if (attr == DW_AT_MIPS_linkage_name) + current_function_info_->mangled_name = data; + } +} + +void CUFunctionInfoHandler::ProcessAttributeUnsigned(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + uint64 data) { + if (attr == DW_AT_stmt_list) { + SectionMap::const_iterator iter = sections_.find("__debug_line"); + assert(iter != sections_.end()); + + scoped_ptr<LineInfo> lireader(new LineInfo(iter->second.first + data, + iter->second.second - data, + reader_, linehandler_)); + lireader->Start(); + } else if (current_function_info_) { + switch (attr) { + case DW_AT_low_pc: + current_function_info_->lowpc = data; + break; + case DW_AT_high_pc: + current_function_info_->highpc = data; + break; + case DW_AT_decl_line: + current_function_info_->line = data; + break; + case DW_AT_decl_file: + current_function_info_->file = files_->at(data).name; + break; + default: + break; + } + } +} + +void CUFunctionInfoHandler::ProcessAttributeReference(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + uint64 data) { + if (current_function_info_) { + switch (attr) { + case DW_AT_specification: { + // Some functions have a "specification" attribute + // which means they were defined elsewhere. The name + // attribute is not repeated, and must be taken from + // the specification DIE. Here we'll assume that + // any DIE referenced in this manner will already have + // been seen, but that's not really required by the spec. + FunctionMap::iterator iter = offset_to_funcinfo_->find(data); + if (iter != offset_to_funcinfo_->end()) { + current_function_info_->name = iter->second->name; + current_function_info_->mangled_name = iter->second->mangled_name; + } else { + // If you hit this, this code probably needs to be rewritten. + fprintf(stderr, + "Error: DW_AT_specification was seen before the referenced " + "DIE! (Looking for DIE at offset %08llx, in DIE at " + "offset %08llx)\n", data, offset); + } + break; + } + default: + break; + } + } +} + +void CUFunctionInfoHandler::EndDIE(uint64 offset) { + if (current_function_info_ && current_function_info_->lowpc) + address_to_funcinfo_->insert(std::make_pair(current_function_info_->lowpc, + current_function_info_)); +} + +} // namespace dwarf2reader diff --git a/3rdParty/Breakpad/src/common/dwarf/functioninfo.h b/3rdParty/Breakpad/src/common/dwarf/functioninfo.h new file mode 100644 index 0000000..0b08a5f --- /dev/null +++ b/3rdParty/Breakpad/src/common/dwarf/functioninfo.h @@ -0,0 +1,188 @@ +// Copyright (c) 2010 Google Inc. All Rights Reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + + +// This file contains the definitions for a DWARF2/3 information +// collector that uses the DWARF2/3 reader interface to build a mapping +// of addresses to files, lines, and functions. + +#ifndef COMMON_DWARF_FUNCTIONINFO_H__ +#define COMMON_DWARF_FUNCTIONINFO_H__ + +#include <map> +#include <string> +#include <utility> +#include <vector> + +#include "common/dwarf/dwarf2reader.h" +#include "common/using_std_string.h" + + +namespace dwarf2reader { + +struct FunctionInfo { + // Name of the function + string name; + // Mangled name of the function + string mangled_name; + // File containing this function + string file; + // Line number for start of function. + uint32 line; + // Beginning address for this function + uint64 lowpc; + // End address for this function. + uint64 highpc; +}; + +struct SourceFileInfo { + // Name of the source file name + string name; + // Low address of source file name + uint64 lowpc; +}; + +typedef std::map<uint64, FunctionInfo*> FunctionMap; +typedef std::map<uint64, std::pair<string, uint32> > LineMap; + +// This class is a basic line info handler that fills in the dirs, +// file, and linemap passed into it with the data produced from the +// LineInfoHandler. +class CULineInfoHandler: public LineInfoHandler { + public: + + // + CULineInfoHandler(std::vector<SourceFileInfo>* files, + std::vector<string>* dirs, + LineMap* linemap); + virtual ~CULineInfoHandler() { } + + // Called when we define a directory. We just place NAME into dirs_ + // at position DIR_NUM. + virtual void DefineDir(const string& name, uint32 dir_num); + + // Called when we define a filename. We just place + // concat(dirs_[DIR_NUM], NAME) into files_ at position FILE_NUM. + virtual void DefineFile(const string& name, int32 file_num, + uint32 dir_num, uint64 mod_time, uint64 length); + + + // Called when the line info reader has a new line, address pair + // ready for us. ADDRESS is the address of the code, LENGTH is the + // length of its machine code in bytes, FILE_NUM is the file number + // containing the code, LINE_NUM is the line number in that file for + // the code, and COLUMN_NUM is the column number the code starts at, + // if we know it (0 otherwise). + virtual void AddLine(uint64 address, uint64 length, + uint32 file_num, uint32 line_num, uint32 column_num); + + private: + LineMap* linemap_; + std::vector<SourceFileInfo>* files_; + std::vector<string>* dirs_; +}; + +class CUFunctionInfoHandler: public Dwarf2Handler { + public: + CUFunctionInfoHandler(std::vector<SourceFileInfo>* files, + std::vector<string>* dirs, + LineMap* linemap, + FunctionMap* offset_to_funcinfo, + FunctionMap* address_to_funcinfo, + CULineInfoHandler* linehandler, + const SectionMap& sections, + ByteReader* reader) + : files_(files), dirs_(dirs), linemap_(linemap), + offset_to_funcinfo_(offset_to_funcinfo), + address_to_funcinfo_(address_to_funcinfo), + linehandler_(linehandler), sections_(sections), + reader_(reader), current_function_info_(NULL) { } + + virtual ~CUFunctionInfoHandler() { } + + // Start to process a compilation unit at OFFSET from the beginning of the + // .debug_info section. We want to see all compilation units, so we + // always return true. + + virtual bool StartCompilationUnit(uint64 offset, uint8 address_size, + uint8 offset_size, uint64 cu_length, + uint8 dwarf_version); + + // Start to process a DIE at OFFSET from the beginning of the + // .debug_info section. We only care about function related DIE's. + virtual bool StartDIE(uint64 offset, enum DwarfTag tag); + + // Called when we have an attribute with unsigned data to give to + // our handler. The attribute is for the DIE at OFFSET from the + // beginning of the .debug_info section, has a name of ATTR, a form of + // FORM, and the actual data of the attribute is in DATA. + virtual void ProcessAttributeUnsigned(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + uint64 data); + + // Called when we have an attribute with a DIE reference to give to + // our handler. The attribute is for the DIE at OFFSET from the + // beginning of the .debug_info section, has a name of ATTR, a form of + // FORM, and the offset of the referenced DIE from the start of the + // .debug_info section is in DATA. + virtual void ProcessAttributeReference(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + uint64 data); + + // Called when we have an attribute with string data to give to + // our handler. The attribute is for the DIE at OFFSET from the + // beginning of the .debug_info section, has a name of ATTR, a form of + // FORM, and the actual data of the attribute is in DATA. + virtual void ProcessAttributeString(uint64 offset, + enum DwarfAttribute attr, + enum DwarfForm form, + const string& data); + + // Called when finished processing the DIE at OFFSET. + // Because DWARF2/3 specifies a tree of DIEs, you may get starts + // before ends of the previous DIE, as we process children before + // ending the parent. + virtual void EndDIE(uint64 offset); + + private: + std::vector<SourceFileInfo>* files_; + std::vector<string>* dirs_; + LineMap* linemap_; + FunctionMap* offset_to_funcinfo_; + FunctionMap* address_to_funcinfo_; + CULineInfoHandler* linehandler_; + const SectionMap& sections_; + ByteReader* reader_; + FunctionInfo* current_function_info_; + uint64 current_compilation_unit_offset_; +}; + +} // namespace dwarf2reader +#endif // COMMON_DWARF_FUNCTIONINFO_H__ diff --git a/3rdParty/Breakpad/src/common/dwarf/types.h b/3rdParty/Breakpad/src/common/dwarf/types.h index 61ca457..59dda31 100644 --- a/3rdParty/Breakpad/src/common/dwarf/types.h +++ b/3rdParty/Breakpad/src/common/dwarf/types.h @@ -45,11 +45,7 @@ typedef unsigned short uint16; typedef unsigned int uint32; typedef unsigned long long uint64; -#ifdef __PTRDIFF_TYPE__ -typedef __PTRDIFF_TYPE__ intptr; -typedef unsigned __PTRDIFF_TYPE__ uintptr; -#else -#error "Can't find pointer-sized integral types." -#endif +typedef intptr_t intptr; +typedef uintptr_t uintptr; #endif // _COMMON_DWARF_TYPES_H__ |