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authorTobias Markmann <tm@ayena.de>2018-03-20 13:12:10 (GMT)
committerTobias Markmann <tm@ayena.de>2018-03-20 14:48:04 (GMT)
commitf2c2c7d035029fb9615b42c18ccea83e8e705b10 (patch)
tree2f56fb77de0f366528395f21732d418f016f63b5 /3rdParty/Breakpad/src/common/mac/dump_syms.cc
parent44581c5285d13c0ec715b35ddc79177e5ebeef39 (diff)
parent5ba3f18ad8efa040d49f36d83ec2e7891a9add9f (diff)
downloadswift-1e10c17b3585afb3a4bb0e849263dd463816d2c0.zip
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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/mac/dump_syms.cc')
-rw-r--r--3rdParty/Breakpad/src/common/mac/dump_syms.cc646
1 files changed, 646 insertions, 0 deletions
diff --git a/3rdParty/Breakpad/src/common/mac/dump_syms.cc b/3rdParty/Breakpad/src/common/mac/dump_syms.cc
new file mode 100644
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--- /dev/null
+++ b/3rdParty/Breakpad/src/common/mac/dump_syms.cc
@@ -0,0 +1,646 @@
+// -*- mode: c++ -*-
+
+// Copyright (c) 2011, 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.
+
+// Author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com>
+
+// dump_syms.cc: Create a symbol file for use with minidumps
+
+#include "common/mac/dump_syms.h"
+
+#include <assert.h>
+#include <dirent.h>
+#include <errno.h>
+#include <libgen.h>
+#include <mach-o/arch.h>
+#include <mach-o/fat.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <ostream>
+#include <string>
+#include <vector>
+
+#include "common/dwarf/bytereader-inl.h"
+#include "common/dwarf/dwarf2reader.h"
+#include "common/dwarf_cfi_to_module.h"
+#include "common/dwarf_cu_to_module.h"
+#include "common/dwarf_line_to_module.h"
+#include "common/mac/file_id.h"
+#include "common/mac/arch_utilities.h"
+#include "common/mac/macho_reader.h"
+#include "common/module.h"
+#include "common/scoped_ptr.h"
+#include "common/stabs_reader.h"
+#include "common/stabs_to_module.h"
+#include "common/symbol_data.h"
+
+#ifndef CPU_TYPE_ARM
+#define CPU_TYPE_ARM (static_cast<cpu_type_t>(12))
+#endif // CPU_TYPE_ARM
+
+#ifndef CPU_TYPE_ARM64
+#define CPU_TYPE_ARM64 (static_cast<cpu_type_t>(16777228))
+#endif // CPU_TYPE_ARM64
+
+using dwarf2reader::ByteReader;
+using google_breakpad::DwarfCUToModule;
+using google_breakpad::DwarfLineToModule;
+using google_breakpad::FileID;
+using google_breakpad::mach_o::FatReader;
+using google_breakpad::mach_o::Section;
+using google_breakpad::mach_o::Segment;
+using google_breakpad::Module;
+using google_breakpad::StabsReader;
+using google_breakpad::StabsToModule;
+using google_breakpad::scoped_ptr;
+using std::make_pair;
+using std::pair;
+using std::string;
+using std::vector;
+
+namespace {
+// Return a vector<string> with absolute paths to all the entries
+// in directory (excluding . and ..).
+vector<string> list_directory(const string& directory) {
+ vector<string> entries;
+ DIR* dir = opendir(directory.c_str());
+ if (!dir) {
+ return entries;
+ }
+
+ string path = directory;
+ if (path[path.length() - 1] != '/') {
+ path += '/';
+ }
+
+ struct dirent* entry = NULL;
+ while ((entry = readdir(dir))) {
+ if (strcmp(entry->d_name, ".") != 0 && strcmp(entry->d_name, "..") != 0) {
+ entries.push_back(path + entry->d_name);
+ }
+ }
+
+ closedir(dir);
+ return entries;
+}
+}
+
+namespace google_breakpad {
+
+bool DumpSymbols::Read(const string &filename) {
+ struct stat st;
+ if (stat(filename.c_str(), &st) == -1) {
+ fprintf(stderr, "Could not access object file %s: %s\n",
+ filename.c_str(), strerror(errno));
+ return false;
+ }
+
+ input_pathname_ = filename;
+
+ // Does this filename refer to a dSYM bundle?
+ string contents_path = input_pathname_ + "/Contents/Resources/DWARF";
+ if (S_ISDIR(st.st_mode) &&
+ access(contents_path.c_str(), F_OK) == 0) {
+ // If there's one file under Contents/Resources/DWARF then use that,
+ // otherwise bail out.
+ const vector<string> entries = list_directory(contents_path);
+ if (entries.size() == 0) {
+ fprintf(stderr, "Unable to find DWARF-bearing file in bundle: %s\n",
+ input_pathname_.c_str());
+ return false;
+ }
+ if (entries.size() > 1) {
+ fprintf(stderr, "Too many DWARF files in bundle: %s\n",
+ input_pathname_.c_str());
+ return false;
+ }
+
+ object_filename_ = entries[0];
+ } else {
+ object_filename_ = input_pathname_;
+ }
+
+ // Read the file's contents into memory.
+ bool read_ok = true;
+ string error;
+ if (stat(object_filename_.c_str(), &st) != -1) {
+ FILE* f = fopen(object_filename_.c_str(), "rb");
+ if (f) {
+ contents_.reset(new uint8_t[st.st_size]);
+ off_t total = 0;
+ while (total < st.st_size && !feof(f)) {
+ size_t read = fread(&contents_[0] + total, 1, st.st_size - total, f);
+ if (read == 0) {
+ if (ferror(f)) {
+ read_ok = false;
+ error = strerror(errno);
+ }
+ break;
+ }
+ total += read;
+ }
+ fclose(f);
+ } else {
+ error = strerror(errno);
+ }
+ }
+
+ if (!read_ok) {
+ fprintf(stderr, "Error reading object file: %s: %s\n",
+ object_filename_.c_str(),
+ error.c_str());
+ return false;
+ }
+
+ // Get the list of object files present in the file.
+ FatReader::Reporter fat_reporter(object_filename_);
+ FatReader fat_reader(&fat_reporter);
+ if (!fat_reader.Read(&contents_[0],
+ st.st_size)) {
+ return false;
+ }
+
+ // Get our own copy of fat_reader's object file list.
+ size_t object_files_count;
+ const SuperFatArch *object_files =
+ fat_reader.object_files(&object_files_count);
+ if (object_files_count == 0) {
+ fprintf(stderr, "Fat binary file contains *no* architectures: %s\n",
+ object_filename_.c_str());
+ return false;
+ }
+ object_files_.resize(object_files_count);
+ memcpy(&object_files_[0], object_files,
+ sizeof(SuperFatArch) * object_files_count);
+
+ return true;
+}
+
+bool DumpSymbols::SetArchitecture(cpu_type_t cpu_type,
+ cpu_subtype_t cpu_subtype) {
+ // Find the best match for the architecture the user requested.
+ const SuperFatArch *best_match = FindBestMatchForArchitecture(
+ cpu_type, cpu_subtype);
+ if (!best_match) return false;
+
+ // Record the selected object file.
+ selected_object_file_ = best_match;
+ return true;
+}
+
+bool DumpSymbols::SetArchitecture(const std::string &arch_name) {
+ bool arch_set = false;
+ const NXArchInfo *arch_info =
+ google_breakpad::BreakpadGetArchInfoFromName(arch_name.c_str());
+ if (arch_info) {
+ arch_set = SetArchitecture(arch_info->cputype, arch_info->cpusubtype);
+ }
+ return arch_set;
+}
+
+SuperFatArch* DumpSymbols::FindBestMatchForArchitecture(
+ cpu_type_t cpu_type, cpu_subtype_t cpu_subtype) {
+ // Check if all the object files can be converted to struct fat_arch.
+ bool can_convert_to_fat_arch = true;
+ vector<struct fat_arch> fat_arch_vector;
+ for (vector<SuperFatArch>::const_iterator it = object_files_.begin();
+ it != object_files_.end();
+ ++it) {
+ struct fat_arch arch;
+ bool success = it->ConvertToFatArch(&arch);
+ if (!success) {
+ can_convert_to_fat_arch = false;
+ break;
+ }
+ fat_arch_vector.push_back(arch);
+ }
+
+ // If all the object files can be converted to struct fat_arch, use
+ // NXFindBestFatArch.
+ if (can_convert_to_fat_arch) {
+ const struct fat_arch *best_match
+ = NXFindBestFatArch(cpu_type, cpu_subtype, &fat_arch_vector[0],
+ static_cast<uint32_t>(fat_arch_vector.size()));
+
+ for (size_t i = 0; i < fat_arch_vector.size(); ++i) {
+ if (best_match == &fat_arch_vector[i])
+ return &object_files_[i];
+ }
+ assert(best_match == NULL);
+ return NULL;
+ }
+
+ // Check for an exact match with cpu_type and cpu_subtype.
+ for (vector<SuperFatArch>::iterator it = object_files_.begin();
+ it != object_files_.end();
+ ++it) {
+ if (static_cast<cpu_type_t>(it->cputype) == cpu_type &&
+ static_cast<cpu_subtype_t>(it->cpusubtype) == cpu_subtype)
+ return &*it;
+ }
+
+ // No exact match found.
+ // TODO(erikchen): If it becomes necessary, we can copy the implementation of
+ // NXFindBestFatArch, located at
+ // http://web.mit.edu/darwin/src/modules/cctools/libmacho/arch.c.
+ fprintf(stderr, "Failed to find an exact match for an object file with cpu "
+ "type: %d and cpu subtype: %d. Furthermore, at least one object file is "
+ "larger than 2**32.\n", cpu_type, cpu_subtype);
+ return NULL;
+}
+
+string DumpSymbols::Identifier() {
+ FileID file_id(object_filename_.c_str());
+ unsigned char identifier_bytes[16];
+ cpu_type_t cpu_type = selected_object_file_->cputype;
+ cpu_subtype_t cpu_subtype = selected_object_file_->cpusubtype;
+ if (!file_id.MachoIdentifier(cpu_type, cpu_subtype, identifier_bytes)) {
+ fprintf(stderr, "Unable to calculate UUID of mach-o binary %s!\n",
+ object_filename_.c_str());
+ return "";
+ }
+
+ char identifier_string[40];
+ FileID::ConvertIdentifierToString(identifier_bytes, identifier_string,
+ sizeof(identifier_string));
+
+ string compacted(identifier_string);
+ for(size_t i = compacted.find('-'); i != string::npos;
+ i = compacted.find('-', i))
+ compacted.erase(i, 1);
+
+ return compacted;
+}
+
+// A line-to-module loader that accepts line number info parsed by
+// dwarf2reader::LineInfo and populates a Module and a line vector
+// with the results.
+class DumpSymbols::DumperLineToModule:
+ public DwarfCUToModule::LineToModuleHandler {
+ public:
+ // Create a line-to-module converter using BYTE_READER.
+ DumperLineToModule(dwarf2reader::ByteReader *byte_reader)
+ : byte_reader_(byte_reader) { }
+
+ void StartCompilationUnit(const string& compilation_dir) {
+ compilation_dir_ = compilation_dir;
+ }
+
+ void ReadProgram(const uint8_t *program, uint64 length,
+ Module *module, vector<Module::Line> *lines) {
+ DwarfLineToModule handler(module, compilation_dir_, lines);
+ dwarf2reader::LineInfo parser(program, length, byte_reader_, &handler);
+ parser.Start();
+ }
+ private:
+ string compilation_dir_;
+ dwarf2reader::ByteReader *byte_reader_; // WEAK
+};
+
+bool DumpSymbols::CreateEmptyModule(scoped_ptr<Module>& module) {
+ // Select an object file, if SetArchitecture hasn't been called to set one
+ // explicitly.
+ if (!selected_object_file_) {
+ // If there's only one architecture, that's the one.
+ if (object_files_.size() == 1)
+ selected_object_file_ = &object_files_[0];
+ else {
+ // Look for an object file whose architecture matches our own.
+ const NXArchInfo *local_arch = NXGetLocalArchInfo();
+ if (!SetArchitecture(local_arch->cputype, local_arch->cpusubtype)) {
+ fprintf(stderr, "%s: object file contains more than one"
+ " architecture, none of which match the current"
+ " architecture; specify an architecture explicitly"
+ " with '-a ARCH' to resolve the ambiguity\n",
+ object_filename_.c_str());
+ return false;
+ }
+ }
+ }
+
+ assert(selected_object_file_);
+
+ // Find the name of the selected file's architecture, to appear in
+ // the MODULE record and in error messages.
+ const NXArchInfo *selected_arch_info =
+ google_breakpad::BreakpadGetArchInfoFromCpuType(
+ selected_object_file_->cputype, selected_object_file_->cpusubtype);
+
+ const char *selected_arch_name = selected_arch_info->name;
+ if (strcmp(selected_arch_name, "i386") == 0)
+ selected_arch_name = "x86";
+
+ // Produce a name to use in error messages that includes the
+ // filename, and the architecture, if there is more than one.
+ selected_object_name_ = object_filename_;
+ if (object_files_.size() > 1) {
+ selected_object_name_ += ", architecture ";
+ selected_object_name_ + selected_arch_name;
+ }
+
+ // Compute a module name, to appear in the MODULE record.
+ string module_name = object_filename_;
+ module_name = basename(&module_name[0]);
+
+ // Choose an identifier string, to appear in the MODULE record.
+ string identifier = Identifier();
+ if (identifier.empty())
+ return false;
+ identifier += "0";
+
+ // Create a module to hold the debugging information.
+ module.reset(new Module(module_name,
+ "mac",
+ selected_arch_name,
+ identifier));
+ return true;
+}
+
+bool DumpSymbols::ReadDwarf(google_breakpad::Module *module,
+ const mach_o::Reader &macho_reader,
+ const mach_o::SectionMap &dwarf_sections,
+ bool handle_inter_cu_refs) const {
+ // Build a byte reader of the appropriate endianness.
+ ByteReader byte_reader(macho_reader.big_endian()
+ ? dwarf2reader::ENDIANNESS_BIG
+ : dwarf2reader::ENDIANNESS_LITTLE);
+
+ // Construct a context for this file.
+ DwarfCUToModule::FileContext file_context(selected_object_name_,
+ module,
+ handle_inter_cu_refs);
+
+ // Build a dwarf2reader::SectionMap from our mach_o::SectionMap.
+ for (mach_o::SectionMap::const_iterator it = dwarf_sections.begin();
+ it != dwarf_sections.end(); ++it) {
+ file_context.AddSectionToSectionMap(
+ it->first,
+ it->second.contents.start,
+ it->second.contents.Size());
+ }
+
+ // Find the __debug_info section.
+ dwarf2reader::SectionMap::const_iterator debug_info_entry =
+ file_context.section_map().find("__debug_info");
+ assert(debug_info_entry != file_context.section_map().end());
+ const std::pair<const uint8_t *, uint64>& debug_info_section =
+ debug_info_entry->second;
+ // There had better be a __debug_info section!
+ if (!debug_info_section.first) {
+ fprintf(stderr, "%s: __DWARF segment of file has no __debug_info section\n",
+ selected_object_name_.c_str());
+ return false;
+ }
+
+ // Build a line-to-module loader for the root handler to use.
+ DumperLineToModule line_to_module(&byte_reader);
+
+ // Walk the __debug_info section, one compilation unit at a time.
+ uint64 debug_info_length = debug_info_section.second;
+ for (uint64 offset = 0; offset < debug_info_length;) {
+ // Make a handler for the root DIE that populates MODULE with the
+ // debug info.
+ DwarfCUToModule::WarningReporter reporter(selected_object_name_,
+ offset);
+ DwarfCUToModule root_handler(&file_context, &line_to_module, &reporter);
+ // Make a Dwarf2Handler that drives our DIEHandler.
+ dwarf2reader::DIEDispatcher die_dispatcher(&root_handler);
+ // Make a DWARF parser for the compilation unit at OFFSET.
+ dwarf2reader::CompilationUnit dwarf_reader(selected_object_name_,
+ file_context.section_map(),
+ offset,
+ &byte_reader,
+ &die_dispatcher);
+ // Process the entire compilation unit; get the offset of the next.
+ offset += dwarf_reader.Start();
+ }
+
+ return true;
+}
+
+bool DumpSymbols::ReadCFI(google_breakpad::Module *module,
+ const mach_o::Reader &macho_reader,
+ const mach_o::Section &section,
+ bool eh_frame) const {
+ // Find the appropriate set of register names for this file's
+ // architecture.
+ vector<string> register_names;
+ switch (macho_reader.cpu_type()) {
+ case CPU_TYPE_X86:
+ register_names = DwarfCFIToModule::RegisterNames::I386();
+ break;
+ case CPU_TYPE_X86_64:
+ register_names = DwarfCFIToModule::RegisterNames::X86_64();
+ break;
+ case CPU_TYPE_ARM:
+ register_names = DwarfCFIToModule::RegisterNames::ARM();
+ break;
+ case CPU_TYPE_ARM64:
+ register_names = DwarfCFIToModule::RegisterNames::ARM64();
+ break;
+ default: {
+ const NXArchInfo *arch = google_breakpad::BreakpadGetArchInfoFromCpuType(
+ macho_reader.cpu_type(), macho_reader.cpu_subtype());
+ fprintf(stderr, "%s: cannot convert DWARF call frame information for ",
+ selected_object_name_.c_str());
+ if (arch)
+ fprintf(stderr, "architecture '%s'", arch->name);
+ else
+ fprintf(stderr, "architecture %d,%d",
+ macho_reader.cpu_type(), macho_reader.cpu_subtype());
+ fprintf(stderr, " to Breakpad symbol file: no register name table\n");
+ return false;
+ }
+ }
+
+ // Find the call frame information and its size.
+ const uint8_t *cfi = section.contents.start;
+ size_t cfi_size = section.contents.Size();
+
+ // Plug together the parser, handler, and their entourages.
+ DwarfCFIToModule::Reporter module_reporter(selected_object_name_,
+ section.section_name);
+ DwarfCFIToModule handler(module, register_names, &module_reporter);
+ dwarf2reader::ByteReader byte_reader(macho_reader.big_endian() ?
+ dwarf2reader::ENDIANNESS_BIG :
+ dwarf2reader::ENDIANNESS_LITTLE);
+ byte_reader.SetAddressSize(macho_reader.bits_64() ? 8 : 4);
+ // At the moment, according to folks at Apple and some cursory
+ // investigation, Mac OS X only uses DW_EH_PE_pcrel-based pointers, so
+ // this is the only base address the CFI parser will need.
+ byte_reader.SetCFIDataBase(section.address, cfi);
+
+ dwarf2reader::CallFrameInfo::Reporter dwarf_reporter(selected_object_name_,
+ section.section_name);
+ dwarf2reader::CallFrameInfo parser(cfi, cfi_size,
+ &byte_reader, &handler, &dwarf_reporter,
+ eh_frame);
+ parser.Start();
+ return true;
+}
+
+// A LoadCommandHandler that loads whatever debugging data it finds into a
+// Module.
+class DumpSymbols::LoadCommandDumper:
+ public mach_o::Reader::LoadCommandHandler {
+ public:
+ // Create a load command dumper handling load commands from READER's
+ // file, and adding data to MODULE.
+ LoadCommandDumper(const DumpSymbols &dumper,
+ google_breakpad::Module *module,
+ const mach_o::Reader &reader,
+ SymbolData symbol_data,
+ bool handle_inter_cu_refs)
+ : dumper_(dumper),
+ module_(module),
+ reader_(reader),
+ symbol_data_(symbol_data),
+ handle_inter_cu_refs_(handle_inter_cu_refs) { }
+
+ bool SegmentCommand(const mach_o::Segment &segment);
+ bool SymtabCommand(const ByteBuffer &entries, const ByteBuffer &strings);
+
+ private:
+ const DumpSymbols &dumper_;
+ google_breakpad::Module *module_; // WEAK
+ const mach_o::Reader &reader_;
+ const SymbolData symbol_data_;
+ const bool handle_inter_cu_refs_;
+};
+
+bool DumpSymbols::LoadCommandDumper::SegmentCommand(const Segment &segment) {
+ mach_o::SectionMap section_map;
+ if (!reader_.MapSegmentSections(segment, &section_map))
+ return false;
+
+ if (segment.name == "__TEXT") {
+ module_->SetLoadAddress(segment.vmaddr);
+ if (symbol_data_ != NO_CFI) {
+ mach_o::SectionMap::const_iterator eh_frame =
+ section_map.find("__eh_frame");
+ if (eh_frame != section_map.end()) {
+ // If there is a problem reading this, don't treat it as a fatal error.
+ dumper_.ReadCFI(module_, reader_, eh_frame->second, true);
+ }
+ }
+ return true;
+ }
+
+ if (segment.name == "__DWARF") {
+ if (symbol_data_ != ONLY_CFI) {
+ if (!dumper_.ReadDwarf(module_, reader_, section_map,
+ handle_inter_cu_refs_)) {
+ return false;
+ }
+ }
+ if (symbol_data_ != NO_CFI) {
+ mach_o::SectionMap::const_iterator debug_frame
+ = section_map.find("__debug_frame");
+ if (debug_frame != section_map.end()) {
+ // If there is a problem reading this, don't treat it as a fatal error.
+ dumper_.ReadCFI(module_, reader_, debug_frame->second, false);
+ }
+ }
+ }
+
+ return true;
+}
+
+bool DumpSymbols::LoadCommandDumper::SymtabCommand(const ByteBuffer &entries,
+ const ByteBuffer &strings) {
+ StabsToModule stabs_to_module(module_);
+ // Mac OS X STABS are never "unitized", and the size of the 'value' field
+ // matches the address size of the executable.
+ StabsReader stabs_reader(entries.start, entries.Size(),
+ strings.start, strings.Size(),
+ reader_.big_endian(),
+ reader_.bits_64() ? 8 : 4,
+ true,
+ &stabs_to_module);
+ if (!stabs_reader.Process())
+ return false;
+ stabs_to_module.Finalize();
+ return true;
+}
+
+bool DumpSymbols::ReadSymbolData(Module** out_module) {
+ scoped_ptr<Module> module;
+ if (!CreateEmptyModule(module))
+ return false;
+
+ // Parse the selected object file.
+ mach_o::Reader::Reporter reporter(selected_object_name_);
+ mach_o::Reader reader(&reporter);
+ if (!reader.Read(&contents_[0]
+ + selected_object_file_->offset,
+ selected_object_file_->size,
+ selected_object_file_->cputype,
+ selected_object_file_->cpusubtype))
+ return false;
+
+ // Walk its load commands, and deal with whatever is there.
+ LoadCommandDumper load_command_dumper(*this, module.get(), reader,
+ symbol_data_, handle_inter_cu_refs_);
+ if (!reader.WalkLoadCommands(&load_command_dumper))
+ return false;
+
+ *out_module = module.release();
+
+ return true;
+}
+
+bool DumpSymbols::WriteSymbolFile(std::ostream &stream) {
+ Module* module = NULL;
+
+ if (ReadSymbolData(&module) && module) {
+ bool res = module->Write(stream, symbol_data_);
+ delete module;
+ return res;
+ }
+
+ return false;
+}
+
+// Read the selected object file's debugging information, and write out the
+// header only to |stream|. Return true on success; if an error occurs, report
+// it and return false.
+bool DumpSymbols::WriteSymbolFileHeader(std::ostream &stream) {
+ scoped_ptr<Module> module;
+ if (!CreateEmptyModule(module))
+ return false;
+
+ return module->Write(stream, symbol_data_);
+}
+
+} // namespace google_breakpad