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Diffstat (limited to '3rdParty/Breakpad/src/common/dwarf/dwarf2reader_cfi_unittest.cc')
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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 |