diff options
Diffstat (limited to 'src/common')
| -rw-r--r-- | src/common/dwarf/bytereader_unittest.cc | 8 | ||||
| -rw-r--r-- | src/common/dwarf/cfi_assembler.h | 6 | ||||
| -rw-r--r-- | src/common/dwarf/dwarf2reader_cfi_unittest.cc | 10 | ||||
| -rw-r--r-- | src/common/mac/macho_reader.cc | 524 | ||||
| -rw-r--r-- | src/common/mac/macho_reader.h | 459 | ||||
| -rw-r--r-- | src/common/mac/macho_reader_unittest.cc | 1898 | ||||
| -rw-r--r-- | src/common/stabs_reader_unittest.cc | 8 | ||||
| -rw-r--r-- | src/common/test_assembler.cc | 15 | ||||
| -rw-r--r-- | src/common/test_assembler.h | 4 |
9 files changed, 2907 insertions, 25 deletions
diff --git a/src/common/dwarf/bytereader_unittest.cc b/src/common/dwarf/bytereader_unittest.cc index 729c54a8..d839dbe7 100644 --- a/src/common/dwarf/bytereader_unittest.cc +++ b/src/common/dwarf/bytereader_unittest.cc @@ -43,10 +43,10 @@ using dwarf2reader::DwarfPointerEncoding; using dwarf2reader::ENDIANNESS_BIG; using dwarf2reader::ENDIANNESS_LITTLE; using google_breakpad::CFISection; -using google_breakpad::TestAssembler::Label; -using google_breakpad::TestAssembler::kBigEndian; -using google_breakpad::TestAssembler::kLittleEndian; -using google_breakpad::TestAssembler::Section; +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 std::string; using testing::Test; diff --git a/src/common/dwarf/cfi_assembler.h b/src/common/dwarf/cfi_assembler.h index 7ec1a109..4c9f57de 100644 --- a/src/common/dwarf/cfi_assembler.h +++ b/src/common/dwarf/cfi_assembler.h @@ -46,9 +46,9 @@ namespace google_breakpad { using dwarf2reader::DwarfPointerEncoding; -using google_breakpad::TestAssembler::Endianness; -using google_breakpad::TestAssembler::Label; -using google_breakpad::TestAssembler::Section; +using google_breakpad::test_assembler::Endianness; +using google_breakpad::test_assembler::Label; +using google_breakpad::test_assembler::Section; using std::string; class CFISection: public Section { diff --git a/src/common/dwarf/dwarf2reader_cfi_unittest.cc b/src/common/dwarf/dwarf2reader_cfi_unittest.cc index 7b346fe2..85889f88 100644 --- a/src/common/dwarf/dwarf2reader_cfi_unittest.cc +++ b/src/common/dwarf/dwarf2reader_cfi_unittest.cc @@ -63,10 +63,10 @@ extern "C" { #include "google_breakpad/common/breakpad_types.h" using google_breakpad::CFISection; -using google_breakpad::TestAssembler::Label; -using google_breakpad::TestAssembler::kBigEndian; -using google_breakpad::TestAssembler::kLittleEndian; -using google_breakpad::TestAssembler::Section; +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; @@ -2315,7 +2315,7 @@ TEST_F(CFIReporter, ClearingCFARule) { #ifdef WRITE_ELF // See comments at the top of the file mentioning WRITE_ELF for details. -using google_breakpad::TestAssembler::Section; +using google_breakpad::test_assembler::Section; struct ELFSectionHeader { ELFSectionHeader(unsigned int set_type) diff --git a/src/common/mac/macho_reader.cc b/src/common/mac/macho_reader.cc new file mode 100644 index 00000000..53da1807 --- /dev/null +++ b/src/common/mac/macho_reader.cc @@ -0,0 +1,524 @@ +// 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> + +// macho_reader.cc: Implementation of google_breakpad::Mach_O::FatReader and +// google_breakpad::Mach_O::Reader. See macho_reader.h for details. + +#include "common/mac/macho_reader.h" + +#include <assert.h> +#include <stdio.h> +#include <stdlib.h> + +namespace google_breakpad { +namespace mach_o { + +// If NDEBUG is #defined, then the 'assert' macro doesn't evaluate its +// arguments, so you can't place expressions that do necessary work in +// the argument of an assert. Nor can you assign the result of the +// expression to a variable and assert that the variable's value is +// true: you'll get unused variable warnings when NDEBUG is #defined. +// +// ASSERT_ALWAYS_EVAL always evaluates its argument, and asserts that +// the result is true if NDEBUG is not #defined. +#if defined(NDEBUG) +#define ASSERT_ALWAYS_EVAL(x) (x) +#else +#define ASSERT_ALWAYS_EVAL(x) assert(x) +#endif + +void FatReader::Reporter::BadHeader() { + fprintf(stderr, "%s: file is neither a fat binary file" + " nor a Mach-O object file\n", filename_.c_str()); +} + +void FatReader::Reporter::TooShort() { + fprintf(stderr, "%s: file too short for the data it claims to contain\n", + filename_.c_str()); +} + +void FatReader::Reporter::MisplacedObjectFile() { + fprintf(stderr, "%s: file too short for the object files it claims" + " to contain\n", filename_.c_str()); +} + +bool FatReader::Read(const uint8_t *buffer, size_t size) { + buffer_.start = buffer; + buffer_.end = buffer + size; + ByteCursor cursor(&buffer_); + + // Fat binaries always use big-endian, so read the magic number in + // that endianness. To recognize Mach-O magic numbers, which can use + // either endianness, check for both the proper and reversed forms + // of the magic numbers. + cursor.set_big_endian(true); + if (cursor >> magic_) { + if (magic_ == FAT_MAGIC) { + // How many object files does this fat binary contain? + uint32_t object_files_count; + if (!(cursor >> object_files_count)) { // nfat_arch + reporter_->TooShort(); + return false; + } + + // Read the list of object files. + object_files_.resize(object_files_count); + for (size_t i = 0; i < object_files_count; i++) { + struct fat_arch *objfile = &object_files_[i]; + + // Read this object file entry, byte-swapping as appropriate. + cursor >> objfile->cputype + >> objfile->cpusubtype + >> objfile->offset + >> objfile->size + >> objfile->align; + if (!cursor) { + reporter_->TooShort(); + return false; + } + // Does the file actually have the bytes this entry refers to? + size_t fat_size = buffer_.Size(); + if (objfile->offset > fat_size || + objfile->size > fat_size - objfile->offset) { + reporter_->MisplacedObjectFile(); + return false; + } + } + + return true; + } else if (magic_ == MH_MAGIC || magic_ == MH_MAGIC_64 || + magic_ == MH_CIGAM || magic_ == MH_CIGAM_64) { + // If this is a little-endian Mach-O file, fix the cursor's endianness. + if (magic_ == MH_CIGAM || magic_ == MH_CIGAM_64) + cursor.set_big_endian(false); + // Record the entire file as a single entry in the object file list. + object_files_.resize(1); + + // Get the cpu type and subtype from the Mach-O header. + if (!(cursor >> object_files_[0].cputype + >> object_files_[0].cpusubtype)) { + reporter_->TooShort(); + return false; + } + + object_files_[0].offset = 0; + object_files_[0].size = buffer_.Size(); + // This alignment is correct for 32 and 64-bit x86 and ppc. + // See get_align in the lipo source for other architectures: + // http://www.opensource.apple.com/source/cctools/cctools-773/misc/lipo.c + object_files_[0].align = 12; // 2^12 == 4096 + + return true; + } + } + + reporter_->BadHeader(); + return false; +} + +void Reader::Reporter::BadHeader() { + fprintf(stderr, "%s: file is not a Mach-O object file\n", filename_.c_str()); +} + +void Reader::Reporter::CPUTypeMismatch(cpu_type_t cpu_type, + cpu_subtype_t cpu_subtype, + cpu_type_t expected_cpu_type, + cpu_subtype_t expected_cpu_subtype) { + fprintf(stderr, "%s: CPU type %d, subtype %d does not match expected" + " type %d, subtype %d\n", + filename_.c_str(), cpu_type, cpu_subtype, + expected_cpu_type, expected_cpu_subtype); +} + +void Reader::Reporter::HeaderTruncated() { + fprintf(stderr, "%s: file does not contain a complete Mach-O header\n", + filename_.c_str()); +} + +void Reader::Reporter::LoadCommandRegionTruncated() { + fprintf(stderr, "%s: file too short to hold load command region" + " given in Mach-O header\n", filename_.c_str()); +} + +void Reader::Reporter::LoadCommandsOverrun(size_t claimed, size_t i, + LoadCommandType type) { + fprintf(stderr, "%s: file's header claims there are %ld" + " load commands, but load command #%ld", + filename_.c_str(), claimed, i); + if (type) fprintf(stderr, ", of type %d,", type); + fprintf(stderr, " extends beyond the end of the load command region\n"); +} + +void Reader::Reporter::LoadCommandTooShort(size_t i, LoadCommandType type) { + fprintf(stderr, "%s: the contents of load command #%ld, of type %d," + " extend beyond the size given in the load command's header\n", + filename_.c_str(), i, type); +} + +void Reader::Reporter::SectionsMissing(const string &name) { + fprintf(stderr, "%s: the load command for segment '%s'" + " is too short to hold the section headers it claims to have\n", + filename_.c_str(), name.c_str()); +} + +void Reader::Reporter::MisplacedSegmentData(const string &name) { + fprintf(stderr, "%s: the segment '%s' claims its contents lie beyond" + " the end of the file\n", filename_.c_str(), name.c_str()); +} + +void Reader::Reporter::MisplacedSectionData(const string §ion, + const string &segment) { + fprintf(stderr, "%s: the section '%s' in segment '%s'" + " claims its contents lie outside the segment's contents\n", + filename_.c_str(), section.c_str(), segment.c_str()); +} + +void Reader::Reporter::MisplacedSymbolTable() { + fprintf(stderr, "%s: the LC_SYMTAB load command claims that the symbol" + " table's contents are located beyond the end of the file\n", + filename_.c_str()); +} + +void Reader::Reporter::UnsupportedCPUType(cpu_type_t cpu_type) { + fprintf(stderr, "%s: CPU type %d is not supported\n", + filename_.c_str(), cpu_type); +} + +bool Reader::Read(const uint8_t *buffer, + size_t size, + cpu_type_t expected_cpu_type, + cpu_subtype_t expected_cpu_subtype) { + assert(!buffer_.start); + buffer_.start = buffer; + buffer_.end = buffer + size; + ByteCursor cursor(&buffer_, true); + uint32_t magic; + if (!(cursor >> magic)) { + reporter_->HeaderTruncated(); + return false; + } + + if (expected_cpu_type != CPU_TYPE_ANY) { + uint32_t expected_magic; + // validate that magic matches the expected cpu type + switch (expected_cpu_type) { + case CPU_TYPE_I386: + expected_magic = MH_CIGAM; + break; + case CPU_TYPE_POWERPC: + expected_magic = MH_MAGIC; + break; + case CPU_TYPE_X86_64: + expected_magic = MH_CIGAM_64; + break; + case CPU_TYPE_POWERPC64: + expected_magic = MH_MAGIC_64; + break; + default: + reporter_->UnsupportedCPUType(expected_cpu_type); + return false; + } + + if (expected_magic != magic) { + reporter_->BadHeader(); + return false; + } + } + + // Since the byte cursor is in big-endian mode, a reversed magic number + // always indicates a little-endian file, regardless of our own endianness. + switch (magic) { + case MH_MAGIC: big_endian_ = true; bits_64_ = false; break; + case MH_CIGAM: big_endian_ = false; bits_64_ = false; break; + case MH_MAGIC_64: big_endian_ = true; bits_64_ = true; break; + case MH_CIGAM_64: big_endian_ = false; bits_64_ = true; break; + default: + reporter_->BadHeader(); + return false; + } + cursor.set_big_endian(big_endian_); + uint32_t commands_size, reserved; + cursor >> cpu_type_ >> cpu_subtype_ >> file_type_ >> load_command_count_ + >> commands_size >> flags_; + if (bits_64_) + cursor >> reserved; + if (!cursor) { + reporter_->HeaderTruncated(); + return false; + } + + if (expected_cpu_type != CPU_TYPE_ANY && + (expected_cpu_type != cpu_type_ || + expected_cpu_subtype != cpu_subtype_)) { + reporter_->CPUTypeMismatch(cpu_type_, cpu_subtype_, + expected_cpu_type, expected_cpu_subtype); + return false; + } + + cursor + .PointTo(&load_commands_.start, commands_size) + .PointTo(&load_commands_.end, 0); + if (!cursor) { + reporter_->LoadCommandRegionTruncated(); + return false; + } + + return true; +} + +bool Reader::WalkLoadCommands(Reader::LoadCommandHandler *handler) const { + ByteCursor list_cursor(&load_commands_, big_endian_); + + for (size_t index = 0; index < load_command_count_; ++index) { + // command refers to this load command alone, so that cursor will + // refuse to read past the load command's end. But since we haven't + // read the size yet, let command initially refer to the entire + // remainder of the load command series. + ByteBuffer command(list_cursor.here(), list_cursor.Available()); + ByteCursor cursor(&command, big_endian_); + + // Read the command type and size --- fields common to all commands. + uint32_t type, size; + if (!(cursor >> type)) { + reporter_->LoadCommandsOverrun(load_command_count_, index, 0); + return false; + } + if (!(cursor >> size) || size > command.Size()) { + reporter_->LoadCommandsOverrun(load_command_count_, index, type); + return false; + } + + // Now that we've read the length, restrict command's range to this + // load command only. + command.end = command.start + size; + + switch (type) { + case LC_SEGMENT: + case LC_SEGMENT_64: { + Segment segment; + segment.bits_64 = (type == LC_SEGMENT_64); + size_t word_size = segment.bits_64 ? 8 : 4; + cursor.CString(&segment.name, 16); + size_t file_offset, file_size; + cursor + .Read(word_size, false, &segment.vmaddr) + .Read(word_size, false, &segment.vmsize) + .Read(word_size, false, &file_offset) + .Read(word_size, false, &file_size); + cursor >> segment.maxprot + >> segment.initprot + >> segment.nsects + >> segment.flags; + if (!cursor) { + reporter_->LoadCommandTooShort(index, type); + return false; + } + if (file_offset > buffer_.Size() || + file_size > buffer_.Size() - file_offset) { + reporter_->MisplacedSegmentData(segment.name); + return false; + } + // Mach-O files in .dSYM bundles have the contents of the loaded + // segments removed, and their file offsets and file sizes zeroed + // out. To help us handle this special case properly, give such + // segments' contents NULL starting and ending pointers. + if (file_offset == 0 && file_size == 0) { + segment.contents.start = segment.contents.end = NULL; + } else { + segment.contents.start = buffer_.start + file_offset; + segment.contents.end = segment.contents.start + file_size; + } + // The section list occupies the remainder of this load command's space. + segment.section_list.start = cursor.here(); + segment.section_list.end = command.end; + + if (!handler->SegmentCommand(segment)) + return false; + break; + } + + case LC_SYMTAB: { + uint32_t symoff, nsyms, stroff, strsize; + cursor >> symoff >> nsyms >> stroff >> strsize; + if (!cursor) { + reporter_->LoadCommandTooShort(index, type); + return false; + } + // How big are the entries in the symbol table? + // sizeof(struct nlist_64) : sizeof(struct nlist), + // but be paranoid about alignment vs. target architecture. + size_t symbol_size = bits_64_ ? 16 : 12; + // How big is the entire symbol array? + size_t symbols_size = nsyms * symbol_size; + if (symoff > buffer_.Size() || symbols_size > buffer_.Size() - symoff || + stroff > buffer_.Size() || strsize > buffer_.Size() - stroff) { + reporter_->MisplacedSymbolTable(); + return false; + } + ByteBuffer entries(buffer_.start + symoff, symbols_size); + ByteBuffer names(buffer_.start + stroff, strsize); + if (!handler->SymtabCommand(entries, names)) + return false; + break; + } + + default: { + if (!handler->UnknownCommand(type, command)) + return false; + break; + } + } + + list_cursor.set_here(command.end); + } + + return true; +} + +// A load command handler that looks for a segment of a given name. +class Reader::SegmentFinder : public LoadCommandHandler { + public: + // Create a load command handler that looks for a segment named NAME, + // and sets SEGMENT to describe it if found. + SegmentFinder(const string &name, Segment *segment) + : name_(name), segment_(segment), found_() { } + + // Return true if the traversal found the segment, false otherwise. + bool found() const { return found_; } + + bool SegmentCommand(const Segment &segment) { + if (segment.name == name_) { + *segment_ = segment; + found_ = true; + return false; + } + return true; + } + + private: + // The name of the segment our creator is looking for. + const string &name_; + + // Where we should store the segment if found. (WEAK) + Segment *segment_; + + // True if we found the segment. + bool found_; +}; + +bool Reader::FindSegment(const string &name, Segment *segment) const { + SegmentFinder finder(name, segment); + WalkLoadCommands(&finder); + return finder.found(); +} + +bool Reader::WalkSegmentSections(const Segment &segment, + SectionHandler *handler) const { + size_t word_size = segment.bits_64 ? 8 : 4; + ByteCursor cursor(&segment.section_list, big_endian_); + + for (size_t i = 0; i < segment.nsects; i++) { + Section section; + section.bits_64 = segment.bits_64; + uint64_t size; + uint32_t offset, dummy32; + cursor + .CString(§ion.section_name, 16) + .CString(§ion.segment_name, 16) + .Read(word_size, false, §ion.address) + .Read(word_size, false, &size) + >> offset + >> section.align + >> dummy32 + >> dummy32 + >> section.flags + >> dummy32 + >> dummy32; + if (section.bits_64) + cursor >> dummy32; + if (!cursor) { + reporter_->SectionsMissing(segment.name); + return false; + } + if ((section.flags & SECTION_TYPE) == S_ZEROFILL) { + // Zero-fill sections have a size, but no contents. + section.contents.start = section.contents.end = NULL; + } else if (segment.contents.start == NULL && + segment.contents.end == NULL) { + // Mach-O files in .dSYM bundles have the contents of the loaded + // segments removed, and their file offsets and file sizes zeroed + // out. However, the sections within those segments still have + // non-zero sizes. There's no reason to call MisplacedSectionData in + // this case; the caller may just need the section's load + // address. But do set the contents' limits to NULL, for safety. + section.contents.start = section.contents.end = NULL; + } else { + if (offset < size_t(segment.contents.start - buffer_.start) || + offset > size_t(segment.contents.end - buffer_.start) || + size > size_t(segment.contents.end - buffer_.start - offset)) { + reporter_->MisplacedSectionData(section.section_name, + section.segment_name); + return false; + } + section.contents.start = buffer_.start + offset; + section.contents.end = section.contents.start + size; + } + if (!handler->HandleSection(section)) + return false; + } + return true; +} + +// A SectionHandler that builds a SectionMap for the sections within a +// given segment. +class Reader::SectionMapper: public SectionHandler { + public: + // Create a SectionHandler that populates MAP with an entry for + // each section it is given. + SectionMapper(SectionMap *map) : map_(map) { } + bool HandleSection(const Section §ion) { + (*map_)[section.section_name] = section; + return true; + } + private: + // The map under construction. (WEAK) + SectionMap *map_; +}; + +bool Reader::MapSegmentSections(const Segment &segment, + SectionMap *section_map) const { + section_map->clear(); + SectionMapper mapper(section_map); + return WalkSegmentSections(segment, &mapper); +} + +} // namespace mach_o +} // namespace google_breakpad diff --git a/src/common/mac/macho_reader.h b/src/common/mac/macho_reader.h new file mode 100644 index 00000000..75376482 --- /dev/null +++ b/src/common/mac/macho_reader.h @@ -0,0 +1,459 @@ +// -*- mode: C++ -*- + +// Copyright (c) 2010, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com> + +// macho_reader.h: A class for parsing Mach-O files. + +#ifndef BREAKPAD_COMMON_MAC_MACHO_READER_H_ +#define BREAKPAD_COMMON_MAC_MACHO_READER_H_ + +#include <mach-o/loader.h> +#include <mach-o/fat.h> +#include <stdint.h> +#include <stdlib.h> +#include <unistd.h> + +#include <map> +#include <string> +#include <vector> + +#include "common/byte_cursor.h" + +namespace google_breakpad { +namespace mach_o { + +using std::map; +using std::string; +using std::vector; + +// The Mac headers don't specify particular types for these groups of +// constants, but defining them here provides some documentation +// value. We also give them the same width as the fields in which +// they appear, which makes them a bit easier to use with ByteCursors. +typedef uint32_t Magic; +typedef uint32_t FileType; +typedef uint32_t FileFlags; +typedef uint32_t LoadCommandType; +typedef uint32_t SegmentFlags; +typedef uint32_t SectionFlags; + +// A parser for fat binary files, used to store universal binaries. +// When applied to a (non-fat) Mach-O file, this behaves as if the +// file were a fat file containing a single object file. +class FatReader { + public: + + // A class for reporting errors found while parsing fat binary files. The + // default definitions of these methods print messages to stderr. + class Reporter { + public: + // Create a reporter that attributes problems to |filename|. + explicit Reporter(const string &filename) : filename_(filename) { } + + virtual ~Reporter() { } + + // The data does not begin with a fat binary or Mach-O magic number. + // This is a fatal error. + virtual void BadHeader(); + + // The Mach-O fat binary file ends abruptly, without enough space + // to contain an object file it claims is present. + virtual void MisplacedObjectFile(); + + // The file ends abruptly: either it is not large enough to hold a + // complete header, or the header implies that contents are present + // beyond the actual end of the file. + virtual void TooShort(); + + private: + // The filename to which the reader should attribute problems. + string filename_; + }; + + // Create a fat binary file reader that uses |reporter| to report problems. + explicit FatReader(Reporter *reporter) : reporter_(reporter) { } + + // Read the |size| bytes at |buffer| as a fat binary file. On success, + // return true; on failure, report the problem to reporter_ and return + // false. + // + // If the data is a plain Mach-O file, rather than a fat binary file, + // then the reader behaves as if it had found a fat binary file whose + // single object file is the Mach-O file. + bool Read(const uint8_t *buffer, size_t size); + + // Return an array of 'struct fat_arch' structures describing the + // object files present in this fat binary file. Set |size| to the + // number of elements in the array. + // + // Assuming Read returned true, the entries are validated: it is + // safe to assume that the offsets and sizes in each 'struct + // fat_arch' refer to subranges of the bytes passed to Read. + // + // If there are no object files in this fat binary, then this + // function can return NULL. + // + // The array is owned by this FatReader instance; it will be freed when + // this FatReader is destroyed. + // + // This function returns a C-style array instead of a vector to make it + // possible to use the result with OS X functions like NXFindBestFatArch, + // so that the symbol dumper will behave consistently with other OS X + // utilities that work with fat binaries. + const struct fat_arch *object_files(size_t *count) const { + *count = object_files_.size(); + if (object_files_.size() > 0) + return &object_files_[0]; + return NULL; + } + + private: + // We use this to report problems parsing the file's contents. (WEAK) + Reporter *reporter_; + + // The contents of the fat binary or Mach-O file we're parsing. We do not + // own the storage it refers to. + ByteBuffer buffer_; + + // The magic number of this binary, in host byte order. + Magic magic_; + + // The list of object files in this binary. + // object_files_.size() == fat_header.nfat_arch + vector<struct fat_arch> object_files_; +}; + +// A segment in a Mach-O file. All these fields have been byte-swapped as +// appropriate for use by the executing architecture. +struct Segment { + // The ByteBuffers below point into the bytes passed to the Reader that + // created this Segment. + + ByteBuffer section_list; // This segment's section list. + ByteBuffer contents; // This segment's contents. + + // This segment's name. + string name; + + // The address at which this segment should be loaded in memory. If + // bits_64 is false, only the bottom 32 bits of this value are valid. + uint64_t vmaddr; + + // The size of this segment when loaded into memory. This may be larger + // than contents.Size(), in which case the extra area will be + // initialized with zeros. If bits_64 is false, only the bottom 32 bits + // of this value are valid. + uint64_t vmsize; + + // The maximum and initial VM protection of this segment's contents. + uint32_t maxprot; + uint32_t initprot; + + // The number of sections in section_list. + uint32_t nsects; + + // Flags describing this segment, from SegmentFlags. + uint32_t flags; + + // True if this is a 64-bit section; false if it is a 32-bit section. + bool bits_64; +}; + +// A section in a Mach-O file. All these fields have been byte-swapped as +// appropriate for use by the executing architecture. +struct Section { + // This section's contents. This points into the bytes passed to the + // Reader that created this Section. + ByteBuffer contents; + + // This section's name. + string section_name; // section[_64].sectname + // The name of the segment this section belongs to. + string segment_name; // section[_64].segname + + // The address at which this section's contents should be loaded in + // memory. If bits_64 is false, only the bottom 32 bits of this value + // are valid. + uint64_t address; + + // The contents of this section should be loaded into memory at an + // address which is a multiple of (two raised to this power). + uint32_t align; + + // Flags from SectionFlags describing the section's contents. + uint32_t flags; + + // We don't support reading relocations yet. + + // True if this is a 64-bit section; false if it is a 32-bit section. + bool bits_64; +}; + +// A map from section names to Sections. +typedef map<string, Section> SectionMap; + +// A reader for a Mach-O file. +// +// This does not handle fat binaries; see FatReader above. FatReader +// provides a friendly interface for parsing data that could be either a +// fat binary or a Mach-O file. +class Reader { + public: + + // A class for reporting errors found while parsing Mach-O files. The + // default definitions of these member functions print messages to + // stderr. + class Reporter { + public: + // Create a reporter that attributes problems to |filename|. + explicit Reporter(const string &filename) : filename_(filename) { } + virtual ~Reporter() { } + + // Reporter functions for fatal errors return void; the reader will + // definitely return an error to its caller after calling them + + // The data does not begin with a Mach-O magic number, or the magic + // number does not match the expected value for the cpu architecture. + // This is a fatal error. + virtual void BadHeader(); + + // The data contained in a Mach-O fat binary (|cpu_type|, |cpu_subtype|) + // does not match the expected CPU architecture + // (|expected_cpu_type|, |expected_cpu_subtype|). + virtual void CPUTypeMismatch(cpu_type_t cpu_type, + cpu_subtype_t cpu_subtype, + cpu_type_t expected_cpu_type, + cpu_subtype_t expected_cpu_subtype); + + // The file ends abruptly: either it is not large enough to hold a + // complete header, or the header implies that contents are present + // beyond the actual end of the file. + virtual void HeaderTruncated(); + + // The file's load command region, as given in the Mach-O header, is + // too large for the file. + virtual void LoadCommandRegionTruncated(); + + // The file's Mach-O header claims the file contains |claimed| load + // commands, but the I'th load command, of type |type|, extends beyond + // the end of the load command region, as given by the Mach-O header. + // If |type| is zero, the command's type was unreadable. + virtual void LoadCommandsOverrun(size_t claimed, size_t i, + LoadCommandType type); + + // The contents of the |i|'th load command, of type |type|, extend beyond + // the size given in the load command's header. + virtual void LoadCommandTooShort(size_t i, LoadCommandType type); + + // The LC_SEGMENT or LC_SEGMENT_64 load command for the segment named + // |name| is too short to hold the sections that its header says it does. + // (This more specific than LoadCommandTooShort.) + virtual void SectionsMissing(const string &name); + + // The segment named |name| claims that its contents lie beyond the end + // of the file. + virtual void MisplacedSegmentData(const string &name); + + // The section named |section| in the segment named |segment| claims that + // its contents do not lie entirely within the segment. + virtual void MisplacedSectionData(const string §ion, + const string &segment); + + // The LC_SYMTAB command claims that symbol table contents are located + // beyond the end of the file. + virtual void MisplacedSymbolTable(); + + // An attempt was made to read a Mach-O file of the unsupported + // CPU architecture |cpu_type|. + virtual void UnsupportedCPUType(cpu_type_t cpu_type); + + private: + string filename_; + }; + + // A handler for sections parsed from a segment. The WalkSegmentSections + // member function accepts an instance of this class, and applies it to + // each section defined in a given segment. + class SectionHandler { + public: + virtual ~SectionHandler() { } + + // Called to report that the segment's section list contains |section|. + // This should return true if the iteration should continue, or false + // if it should stop. + virtual bool HandleSection(const Section §ion) = 0; + }; + + // A handler for the load commands in a Mach-O file. + class LoadCommandHandler { + public: + LoadCommandHandler() { } + virtual ~LoadCommandHandler() { } + + // When called from WalkLoadCommands, the following handler functions + // should return true if they wish to continue iterating over the load + // command list, or false if they wish to stop iterating. + // + // When called from LoadCommandIterator::Handle or Reader::Handle, + // these functions' return values are simply passed through to Handle's + // caller. + // + // The definitions provided by this base class simply return true; the + // default is to silently ignore sections whose member functions the + // subclass doesn't override. + + // COMMAND is load command we don't recognize. We provide only the + // command type and a ByteBuffer enclosing the command's data (If we + // cannot parse the command type or its size, we call + // reporter_->IncompleteLoadCommand instead.) + virtual bool UnknownCommand(LoadCommandType type, + const ByteBuffer &contents) { + return true; + } + + // The load command is LC_SEGMENT or LC_SEGMENT_64, defining a segment + // with the properties given in |segment|. + virtual bool SegmentCommand(const Segment &segment) { + return true; + } + + // The load command is LC_SYMTAB. |entries| holds the array of nlist + // entries, and |names| holds the strings the entries refer to. + virtual bool SymtabCommand(const ByteBuffer &entries, + const ByteBuffer &names) { + return true; + } + + // Add handler functions for more load commands here as needed. + }; + + // Create a Mach-O file reader that reports problems to |reporter|. + explicit Reader(Reporter *reporter) + : reporter_(reporter) { } + + // Read the given data as a Mach-O file. The reader retains pointers + // into the data passed, so the data should live as long as the reader + // does. On success, return true; on failure, return false. + // + // At most one of these functions should be invoked once on each Reader + // instance. + bool Read(const uint8_t *buffer, + size_t size, + cpu_type_t expected_cpu_type, + cpu_subtype_t expected_cpu_subtype); + bool Read(const ByteBuffer &buffer, + cpu_type_t expected_cpu_type, + cpu_subtype_t expected_cpu_subtype) { + return Read(buffer.start, + buffer.Size(), + expected_cpu_type, + expected_cpu_subtype); + } + + // Return this file's characteristics, as found in the Mach-O header. + cpu_type_t cpu_type() const { return cpu_type_; } + cpu_subtype_t cpu_subtype() const { return cpu_subtype_; } + FileType file_type() const { return file_type_; } + FileFlags flags() const { return flags_; } + + // Return true if this is a 64-bit Mach-O file, false if it is a 32-bit + // Mach-O file. + bool bits_64() const { return bits_64_; } + + // Return true if this is a big-endian Mach-O file, false if it is + // little-endian. + bool big_endian() const { return big_endian_; } + + // Apply |handler| to each load command in this Mach-O file, stopping when + // a handler function returns false. If we encounter a malformed load + // command, report it via reporter_ and return false. Return true if all + // load commands were parseable and all handlers returned true. + bool WalkLoadCommands(LoadCommandHandler *handler) const; + + // Set |segment| to describe the segment named |name|, if present. If + // found, |segment|'s byte buffers refer to a subregion of the bytes + // passed to Read. If we find the section, return true; otherwise, + // return false. + bool FindSegment(const string &name, Segment *segment) const; + + // Apply |handler| to each section defined in |segment|. If |handler| returns + // false, stop iterating and return false. If all calls to |handler| return + // true and we reach the end of the section list, return true. + bool WalkSegmentSections(const Segment &segment, SectionHandler *handler) + const; + + // Clear |section_map| and then populate it with a map of the sections + // in |segment|, from section names to Section structures. + // Each Section's contents refer to bytes in |segment|'s contents. + // On success, return true; if a problem occurs, report it and return false. + bool MapSegmentSections(const Segment &segment, SectionMap *section_map) + const; + + private: + // Used internally. + class SegmentFinder; + class SectionMapper; + + // We use this to report problems parsing the file's contents. (WEAK) + Reporter *reporter_; + + // The contents of the Mach-O file we're parsing. We do not own the + // storage it refers to. + ByteBuffer buffer_; + + // True if this file is big-endian. + bool big_endian_; + + // True if this file is a 64-bit Mach-O file. + bool bits_64_; + + // This file's cpu type and subtype. + cpu_type_t cpu_type_; // mach_header[_64].cputype + cpu_subtype_t cpu_subtype_; // mach_header[_64].cpusubtype + + // This file's type. + FileType file_type_; // mach_header[_64].filetype + + // The region of buffer_ occupied by load commands. + ByteBuffer load_commands_; + + // The number of load commands in load_commands_. + uint32_t load_command_count_; // mach_header[_64].ncmds + + // This file's header flags. + FileFlags flags_; +}; + +} // namespace mach_o +} // namespace google_breakpad + +#endif // BREAKPAD_COMMON_MAC_MACHO_READER_H_ diff --git a/src/common/mac/macho_reader_unittest.cc b/src/common/mac/macho_reader_unittest.cc new file mode 100644 index 00000000..4e478d79 --- /dev/null +++ b/src/common/mac/macho_reader_unittest.cc @@ -0,0 +1,1898 @@ +// 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> + +// macho_reader_unittest.cc: Unit tests for google_breakpad::Mach_O::FatReader +// and google_breakpad::Mach_O::Reader. + +#include <map> +#include <string> +#include <vector> + +#include "breakpad_googletest_includes.h" +#include "common/mac/macho_reader.h" +#include "common/test_assembler.h" + +namespace mach_o = google_breakpad::mach_o; +namespace test_assembler = google_breakpad::test_assembler; + +using mach_o::FatReader; +using mach_o::FileFlags; +using mach_o::FileType; +using mach_o::LoadCommandType; +using mach_o::Reader; +using mach_o::Section; +using mach_o::SectionMap; +using mach_o::Segment; +using test_assembler::Endianness; +using test_assembler::Label; +using test_assembler::kBigEndian; +using test_assembler::kLittleEndian; +using test_assembler::kUnsetEndian; +using google_breakpad::ByteBuffer; +using std::map; +using std::string; +using std::vector; +using testing::AllOf; +using testing::DoAll; +using testing::Field; +using testing::InSequence; +using testing::Matcher; +using testing::Return; +using testing::SaveArg; +using testing::Test; +using testing::_; + + +// Mock classes for the reader's various reporters and handlers. + +class MockFatReaderReporter: public FatReader::Reporter { + public: + MockFatReaderReporter(const string &filename) + : FatReader::Reporter(filename) { } + MOCK_METHOD0(BadHeader, void()); + MOCK_METHOD0(MisplacedObjectFile, void()); + MOCK_METHOD0(TooShort, void()); +}; + +class MockReaderReporter: public Reader::Reporter { + public: + MockReaderReporter(const string &filename) : Reader::Reporter(filename) { } + MOCK_METHOD0(BadHeader, void()); + MOCK_METHOD4(CPUTypeMismatch, void(cpu_type_t cpu_type, + cpu_subtype_t cpu_subtype, + cpu_type_t expected_cpu_type, + cpu_subtype_t expected_cpu_subtype)); + MOCK_METHOD0(HeaderTruncated, void()); + MOCK_METHOD0(LoadCommandRegionTruncated, void()); + MOCK_METHOD3(LoadCommandsOverrun, void(size_t claimed, size_t i, + LoadCommandType type)); + MOCK_METHOD2(LoadCommandTooShort, void(size_t i, LoadCommandType type)); + MOCK_METHOD1(SectionsMissing, void(const string &name)); + MOCK_METHOD1(MisplacedSegmentData, void(const string &name)); + MOCK_METHOD2(MisplacedSectionData, void(const string §ion, + const string &segment)); + MOCK_METHOD0(MisplacedSymbolTable, void()); + MOCK_METHOD1(UnsupportedCPUType, void(cpu_type_t cpu_type)); +}; + +class MockLoadCommandHandler: public Reader::LoadCommandHandler { + public: + MOCK_METHOD2(UnknownCommand, bool(LoadCommandType, const ByteBuffer &)); + MOCK_METHOD1(SegmentCommand, bool(const Segment &)); + MOCK_METHOD2(SymtabCommand, bool(const ByteBuffer &, const ByteBuffer &)); +}; + +class MockSectionHandler: public Reader::SectionHandler { + public: + MOCK_METHOD1(HandleSection, bool(const Section §ion)); +}; + + +// Tests for mach_o::FatReader. + +// Since the effect of these functions is to write to stderr, the +// results of these tests must be inspected by hand. +TEST(FatReaderReporter, BadHeader) { + FatReader::Reporter reporter("filename"); + reporter.BadHeader(); +} + +TEST(FatReaderReporter, MisplacedObjectFile) { + FatReader::Reporter reporter("filename"); + reporter.MisplacedObjectFile(); +} + +TEST(FatReaderReporter, TooShort) { + FatReader::Reporter reporter("filename"); + reporter.TooShort(); +} + +TEST(MachOReaderReporter, BadHeader) { + Reader::Reporter reporter("filename"); + reporter.BadHeader(); +} + +TEST(MachOReaderReporter, CPUTypeMismatch) { + Reader::Reporter reporter("filename"); + reporter.CPUTypeMismatch(CPU_TYPE_I386, CPU_SUBTYPE_X86_ALL, + CPU_TYPE_POWERPC, CPU_SUBTYPE_POWERPC_ALL); +} + +TEST(MachOReaderReporter, HeaderTruncated) { + Reader::Reporter reporter("filename"); + reporter.HeaderTruncated(); +} + +TEST(MachOReaderReporter, LoadCommandRegionTruncated) { + Reader::Reporter reporter("filename"); + reporter.LoadCommandRegionTruncated(); +} + +TEST(MachOReaderReporter, LoadCommandsOverrun) { + Reader::Reporter reporter("filename"); + reporter.LoadCommandsOverrun(10, 9, LC_DYSYMTAB); + reporter.LoadCommandsOverrun(10, 9, 0); +} + +TEST(MachOReaderReporter, LoadCommandTooShort) { + Reader::Reporter reporter("filename"); + reporter.LoadCommandTooShort(11, LC_SYMTAB); +} + +TEST(MachOReaderReporter, SectionsMissing) { + Reader::Reporter reporter("filename"); + reporter.SectionsMissing("segment name"); +} + +TEST(MachOReaderReporter, MisplacedSegmentData) { + Reader::Reporter reporter("filename"); + reporter.MisplacedSegmentData("segment name"); +} + +TEST(MachOReaderReporter, MisplacedSectionData) { + Reader::Reporter reporter("filename"); + reporter.MisplacedSectionData("section name", "segment name"); +} + +TEST(MachOReaderReporter, MisplacedSymbolTable) { + Reader::Reporter reporter("filename"); + reporter.MisplacedSymbolTable(); +} + +TEST(MachOReaderReporter, UnsupportedCPUType) { + Reader::Reporter reporter("filename"); + reporter.UnsupportedCPUType(CPU_TYPE_HPPA); +} + +struct FatReaderFixture { + FatReaderFixture() + : fat(kBigEndian), + reporter("reporter filename"), + reader(&reporter), object_files(), object_files_size() { + EXPECT_CALL(reporter, BadHeader()).Times(0); + EXPECT_CALL(reporter, TooShort()).Times(0); + + // here, start, and Mark are file offsets in 'fat'. + fat.start() = 0; + } + // Append a 'fat_arch' entry to 'fat', with the given field values. + void AppendFatArch(cpu_type_t type, cpu_subtype_t subtype, + Label offset, Label size, uint32_t align) { + fat + .B32(type) + .B32(subtype) + .B32(offset) + .B32(size) + .B32(align); + } + // Append |n| dummy 'fat_arch' entries to 'fat'. The cpu type and + // subtype have unrealistic values. + void AppendDummyArchEntries(int n) { + for (int i = 0; i < n; i++) + AppendFatArch(0xb68ad617, 0x715a0840, 0, 0, 1); + } + void ReadFat(bool expect_parse_success = true) { + ASSERT_TRUE(fat.GetContents(&contents)); + fat_bytes = reinterpret_cast<const uint8_t *>(contents.data()); + if (expect_parse_success) { + EXPECT_TRUE(reader.Read(fat_bytes, contents.size())); + object_files = reader.object_files(&object_files_size); + } + else + EXPECT_FALSE(reader.Read(fat_bytes, contents.size())); + } + test_assembler::Section fat; + MockFatReaderReporter reporter; + FatReader reader; + string contents; + const uint8_t *fat_bytes; + const struct fat_arch *object_files; + size_t object_files_size; +}; + +class FatReaderTest: public FatReaderFixture, public Test { }; + +TEST_F(FatReaderTest, BadMagic) { + EXPECT_CALL(reporter, BadHeader()).Times(1); + fat + .B32(0xcafed00d) // magic number (incorrect) + .B32(10); // number of architectures + AppendDummyArchEntries(10); + ReadFat(false); +} + +TEST_F(FatReaderTest, HeaderTooShort) { + EXPECT_CALL(reporter, TooShort()).Times(1); + fat + .B32(0xcafebabe); // magic number + ReadFat(false); +} + +TEST_F(FatReaderTest, ObjectListTooShort) { + EXPECT_CALL(reporter, TooShort()).Times(1); + fat + .B32(0xcafebabe) // magic number + .B32(10); // number of architectures + AppendDummyArchEntries(9); // nine dummy architecture entries... + fat // and a tenth, missing a byte at the end + .B32(0x3d46c8fc) // cpu type + .B32(0x8a7bfb01) // cpu subtype + .B32(0) // offset + .B32(0) // size + .Append(3, '*'); // one byte short of a four-byte alignment + ReadFat(false); +} + +TEST_F(FatReaderTest, DataTooShort) { + EXPECT_CALL(reporter, MisplacedObjectFile()).Times(1); + Label arch_data; + fat + .B32(0xcafebabe) // magic number + .B32(1); // number of architectures + AppendFatArch(0xb4d4a366, 0x4ba4f525, arch_data, 40, 0); + fat + .Mark(&arch_data) // file data begins here + .Append(30, '*'); // only 30 bytes, not 40 as header claims + ReadFat(false); +} + +TEST_F(FatReaderTest, NoObjectFiles) { + fat + .B32(0xcafebabe) // magic number + .B32(0); // number of architectures + ReadFat(); + EXPECT_EQ(0U, object_files_size); +} + +TEST_F(FatReaderTest, OneObjectFile) { + Label obj1_offset; + fat + .B32(0xcafebabe) // magic number + .B32(1); // number of architectures + // First object file list entry + AppendFatArch(0x5e3a6e91, 0x52ccd852, obj1_offset, 0x42, 0x355b15b2); + // First object file data + fat + .Mark(&obj1_offset) + .Append(0x42, '*'); // dummy contents + ReadFat(); + ASSERT_EQ(1U, object_files_size); + EXPECT_EQ(0x5e3a6e91, object_files[0].cputype); + EXPECT_EQ(0x52ccd852, object_files[0].cpusubtype); + EXPECT_EQ(obj1_offset.Value(), object_files[0].offset); + EXPECT_EQ(0x42U, object_files[0].size); + EXPECT_EQ(0x355b15b2U, object_files[0].align); +} + +TEST_F(FatReaderTest, ThreeObjectFiles) { + Label obj1, obj2, obj3; + fat + .B32(0xcafebabe) // magic number + .B32(3); // number of architectures + // Three object file list entries. + AppendFatArch(0x0cb92c30, 0x6a159a71, obj1, 0xfb4, 0x2615dbe8); + AppendFatArch(0x0f3f1cbb, 0x6c55e90f, obj2, 0xc31, 0x83af6ffd); + AppendFatArch(0x3717276d, 0x10ecdc84, obj3, 0x4b3, 0x035267d7); + fat + // First object file data + .Mark(&obj1) + .Append(0xfb4, '*') // dummy contents + // Second object file data + .Mark(&obj2) + .Append(0xc31, '%') // dummy contents + // Third object file data + .Mark(&obj3) + .Append(0x4b3, '^'); // dummy contents + + ReadFat(); + + ASSERT_EQ(3U, object_files_size); + + // First object file. + EXPECT_EQ(0x0cb92c30, object_files[0].cputype); + EXPECT_EQ(0x6a159a71, object_files[0].cpusubtype); + EXPECT_EQ(obj1.Value(), object_files[0].offset); + EXPECT_EQ(0xfb4U, object_files[0].size); + EXPECT_EQ(0x2615dbe8U, object_files[0].align); + + // Second object file. + EXPECT_EQ(0x0f3f1cbb, object_files[1].cputype); + EXPECT_EQ(0x6c55e90f, object_files[1].cpusubtype); + EXPECT_EQ(obj2.Value(), object_files[1].offset); + EXPECT_EQ(0xc31U, object_files[1].size); + EXPECT_EQ(0x83af6ffdU, object_files[1].align); + + // Third object file. + EXPECT_EQ(0x3717276d, object_files[2].cputype); + EXPECT_EQ(0x10ecdc84, object_files[2].cpusubtype); + EXPECT_EQ(obj3.Value(), object_files[2].offset); + EXPECT_EQ(0x4b3U, object_files[2].size); + EXPECT_EQ(0x035267d7U, object_files[2].align); +} + +TEST_F(FatReaderTest, BigEndianMachO32) { + fat.set_endianness(kBigEndian); + fat + .D32(0xfeedface) // Mach-O file magic number + .D32(0x1a9d0518) // cpu type + .D32(0x1b779357) // cpu subtype + .D32(0x009df67e) // file type + .D32(0) // no load commands + .D32(0) // the load commands occupy no bytes + .D32(0x21987a99); // flags + + ReadFat(); + + // FatReader should treat a Mach-O file as if it were a fat binary file + // containing one object file --- the whole thing. + ASSERT_EQ(1U, object_files_size); + EXPECT_EQ(0x1a9d0518, object_files[0].cputype); + EXPECT_EQ(0x1b779357, object_files[0].cpusubtype); + EXPECT_EQ(0U, object_files[0].offset); + EXPECT_EQ(contents.size(), object_files[0].size); +} + +TEST_F(FatReaderTest, BigEndianMachO64) { + fat.set_endianness(kBigEndian); + fat + .D32(0xfeedfacf) // Mach-O 64-bit file magic number + .D32(0x5aff8487) // cpu type + .D32(0x4c6a57f7) // cpu subtype + .D32(0x4392d2c8) // file type + .D32(0) // no load commands + .D32(0) // the load commands occupy no bytes + .D32(0x1b033eea); // flags + + ReadFat(); + + // FatReader should treat a Mach-O file as if it were a fat binary file + // containing one object file --- the whole thing. + ASSERT_EQ(1U, object_files_size); + EXPECT_EQ(0x5aff8487, object_files[0].cputype); + EXPECT_EQ(0x4c6a57f7, object_files[0].cpusubtype); + EXPECT_EQ(0U, object_files[0].offset); + EXPECT_EQ(contents.size(), object_files[0].size); +} + +TEST_F(FatReaderTest, LittleEndianMachO32) { + fat.set_endianness(kLittleEndian); + fat + .D32(0xfeedface) // Mach-O file magic number + .D32(0x1a9d0518) // cpu type + .D32(0x1b779357) // cpu subtype + .D32(0x009df67e) // file type + .D32(0) // no load commands + .D32(0) // the load commands occupy no bytes + .D32(0x21987a99); // flags + + ReadFat(); + + // FatReader should treat a Mach-O file as if it were a fat binary file + // containing one object file --- the whole thing. + ASSERT_EQ(1U, object_files_size); + EXPECT_EQ(0x1a9d0518, object_files[0].cputype); + EXPECT_EQ(0x1b779357, object_files[0].cpusubtype); + EXPECT_EQ(0U, object_files[0].offset); + EXPECT_EQ(contents.size(), object_files[0].size); +} + +TEST_F(FatReaderTest, LittleEndianMachO64) { + fat.set_endianness(kLittleEndian); + fat + .D32(0xfeedfacf) // Mach-O 64-bit file magic number + .D32(0x5aff8487) // cpu type + .D32(0x4c6a57f7) // cpu subtype + .D32(0x4392d2c8) // file type + .D32(0) // no load commands + .D32(0) // the load commands occupy no bytes + .D32(0x1b033eea); // flags + + ReadFat(); + + // FatReader should treat a Mach-O file as if it were a fat binary file + // containing one object file --- the whole thing. + ASSERT_EQ(1U, object_files_size); + EXPECT_EQ(0x5aff8487, object_files[0].cputype); + EXPECT_EQ(0x4c6a57f7, object_files[0].cpusubtype); + EXPECT_EQ(0U, object_files[0].offset); + EXPECT_EQ(contents.size(), object_files[0].size); +} + +TEST_F(FatReaderTest, IncompleteMach) { + fat.set_endianness(kLittleEndian); + fat + .D32(0xfeedfacf) // Mach-O 64-bit file magic number + .D32(0x5aff8487); // cpu type + // Truncated! + + EXPECT_CALL(reporter, TooShort()).WillOnce(Return()); + + ReadFat(false); +} + + +// General mach_o::Reader tests. + +// Dynamically scoped configuration data. +class WithConfiguration { + public: + // Establish the given parameters as the default for SizedSections + // created within the dynamic scope of this instance. + WithConfiguration(Endianness endianness, size_t word_size) + : endianness_(endianness), word_size_(word_size), saved_(current_) { + current_ = this; + } + ~WithConfiguration() { current_ = saved_; } + static Endianness endianness() { + assert(current_); + return current_->endianness_; + } + static size_t word_size() { + assert(current_); + return current_->word_size_; + } + + private: + // The innermost WithConfiguration in whose dynamic scope we are + // currently executing. + static WithConfiguration *current_; + + // The innermost WithConfiguration whose dynamic scope encloses this + // WithConfiguration. + Endianness endianness_; + size_t word_size_; + WithConfiguration *saved_; +}; + +WithConfiguration *WithConfiguration::current_ = NULL; + +// A test_assembler::Section with a size that we can cite. The start(), +// Here() and Mark() member functions of a SizedSection always represent +// offsets within the overall file. +class SizedSection: public test_assembler::Section { + public: + // Construct a section of the given endianness and word size. + explicit SizedSection(Endianness endianness, size_t word_size) + : test_assembler::Section(endianness), word_size_(word_size) { + assert(word_size_ == 32 || word_size_ == 64); + } + SizedSection() + : test_assembler::Section(WithConfiguration::endianness()), + word_size_(WithConfiguration::word_size()) { + assert(word_size_ == 32 || word_size_ == 64); + } + + // Access/set this section's word size. + size_t word_size() const { return word_size_; } + void set_word_size(size_t word_size) { + assert(word_size_ == 32 || word_size_ == 64); + word_size_ = word_size; + } + + // Return a label representing the size this section will have when it + // is Placed in some containing section. + Label final_size() const { return final_size_; } + + // Append SECTION to the end of this section, and call its Finish member. + // Return a reference to this section. + SizedSection &Place(SizedSection *section) { + assert(section->endianness() == endianness()); + section->Finish(); + section->start() = Here(); + test_assembler::Section::Append(*section); + return *this; + } + + protected: + // Mark this section's contents as complete. For plain SizedSections, we + // set SECTION's start to its position in this section, and its final_size + // label to its current size. Derived classes can extend this as needed + // for their additional semantics. + virtual void Finish() { + final_size_ = Size(); + } + + // The word size for this data: either 32 or 64. + size_t word_size_; + + private: + // This section's final size, set when we are placed in some other + // SizedSection. + Label final_size_; +}; + +// A SizedSection that is loaded into memory at a particular address. +class LoadedSection: public SizedSection { + public: + explicit LoadedSection(Label address = Label()) : address_(address) { } + + // Return a label representing this section's address. + Label address() const { return address_; } + + // Placing a loaded section within a loaded section sets the relationship + // between their addresses. + LoadedSection &Place(LoadedSection *section) { + section->address() = address() + Size(); + SizedSection::Place(section); + return *this; + } + + protected: + // The address at which this section's contents will be loaded. + Label address_; +}; + +// A SizedSection representing a segment load command. +class SegmentLoadCommand: public SizedSection { + public: + SegmentLoadCommand() : section_count_(0) { } + + // Append a segment load command header with the given characteristics. + // The load command will refer to CONTENTS, which must be Placed in the + // file separately, at the desired position. Return a reference to this + // section. + SegmentLoadCommand &Header(const string &name, const LoadedSection &contents, + uint32_t maxprot, uint32_t initprot, + uint32_t flags) { + assert(contents.word_size() == word_size()); + D32(word_size() == 32 ? LC_SEGMENT : LC_SEGMENT_64); + D32(final_size()); + AppendCString(name, 16); + Append(endianness(), word_size() / 8, contents.address()); + Append(endianness(), word_size() / 8, vmsize_); + Append(endianness(), word_size() / 8, contents.start()); + Append(endianness(), word_size() / 8, contents.final_size()); + D32(maxprot); + D32(initprot); + D32(final_section_count_); + D32(flags); + + content_final_size_ = contents.final_size(); + + return *this; + } + + // Return a label representing the size of this segment when loaded into + // memory. If this label is still undefined by the time we place this + // segment, it defaults to the final size of the segment's in-file + // contents. Return a reference to this load command. + Label &vmsize() { return vmsize_; } + + // Add a section entry with the given characteristics to this segment + // load command. Return a reference to this. The section entry will refer + // to CONTENTS, which must be Placed in the segment's contents + // separately, at the desired position. + SegmentLoadCommand &AppendSectionEntry(const string §ion_name, + const string &segment_name, + uint32_t alignment, uint32_t flags, + const LoadedSection &contents) { + AppendCString(section_name, 16); + AppendCString(segment_name, 16); + Append(endianness(), word_size() / 8, contents.address()); + Append(endianness(), word_size() / 8, contents.final_size()); + D32(contents.start()); + D32(alignment); + D32(0); // relocations start + D32(0); // relocations size + D32(flags); + D32(0x93656b95); // reserved1 + D32(0xc35a2473); // reserved2 + if (word_size() == 64) + D32(0x70284b95); // reserved3 + + section_count_++; + + return *this; + } + + protected: + void Finish() { + final_section_count_ = section_count_; + if (!vmsize_.IsKnownConstant()) + vmsize_ = content_final_size_; + SizedSection::Finish(); + } + + private: + // The number of sections that have been added to this segment so far. + size_t section_count_; + + // A label representing the final number of sections this segment will hold. + Label final_section_count_; + + // The size of the contents for this segment present in the file. + Label content_final_size_; + + // A label representing the size of this segment when loaded; this can be + // larger than the size of its file contents, the difference being + // zero-filled. If not set explicitly by calling set_vmsize, this is set + // equal to the size of the contents. + Label vmsize_; +}; + +// A SizedSection holding a list of Mach-O load commands. +class LoadCommands: public SizedSection { + public: + LoadCommands() : command_count_(0) { } + + // Return a label representing the final load command count. + Label final_command_count() const { return final_command_count_; } + + // Increment the command count; return a reference to this section. + LoadCommands &CountCommand() { + command_count_++; + return *this; + } + + // Place COMMAND, containing a load command, at the end of this section. + // Return a reference to this section. + LoadCommands &Place(SizedSection *section) { + SizedSection::Place(section); + CountCommand(); + return *this; + } + + protected: + // Mark this load command list as complete. + void Finish() { + SizedSection::Finish(); + final_command_count_ = command_count_; + } + + private: + // The number of load commands we have added to this file so far. + size_t command_count_; + + // A label representing the final command count. + Label final_command_count_; +}; + +// A SizedSection holding the contents of a Mach-O file. Within a +// MachOFile, the start, Here, and Mark members refer to file offsets. +class MachOFile: public SizedSection { + public: + MachOFile() { + start() = 0; + } + + // Create a Mach-O file header using the given characteristics and load + // command list. This Places COMMANDS immediately after the header. + // Return a reference to this section. + MachOFile &Header(LoadCommands *commands, + cpu_type_t cpu_type = CPU_TYPE_X86, + cpu_subtype_t cpu_subtype = CPU_SUBTYPE_I386_ALL, + FileType file_type = MH_EXECUTE, + uint32_t file_flags = (MH_TWOLEVEL | + MH_DYLDLINK | + MH_NOUNDEFS)) { + D32(word_size() == 32 ? 0xfeedface : 0xfeedfacf); // magic number + D32(cpu_type); // cpu type + D32(cpu_subtype); // cpu subtype + D32(file_type); // file type + D32(commands->final_command_count()); // number of load commands + D32(commands->final_size()); // their size in bytes + D32(file_flags); // flags + if (word_size() == 64) + D32(0x55638b90); // reserved + Place(commands); + return *this; + } +}; + + +struct ReaderFixture { + ReaderFixture() + : reporter("reporter filename"), + reader(&reporter) { + EXPECT_CALL(reporter, BadHeader()).Times(0); + EXPECT_CALL(reporter, CPUTypeMismatch(_, _, _, _)).Times(0); + EXPECT_CALL(reporter, HeaderTruncated()).Times(0); + EXPECT_CALL(reporter, LoadCommandRegionTruncated()).Times(0); + EXPECT_CALL(reporter, LoadCommandsOverrun(_, _, _)).Times(0); + EXPECT_CALL(reporter, LoadCommandTooShort(_, _)).Times(0); + EXPECT_CALL(reporter, SectionsMissing(_)).Times(0); + EXPECT_CALL(reporter, MisplacedSegmentData(_)).Times(0); + EXPECT_CALL(reporter, MisplacedSectionData(_, _)).Times(0); + EXPECT_CALL(reporter, MisplacedSymbolTable()).Times(0); + EXPECT_CALL(reporter, UnsupportedCPUType(_)).Times(0); + + EXPECT_CALL(load_command_handler, UnknownCommand(_, _)).Times(0); + EXPECT_CALL(load_command_handler, SegmentCommand(_)).Times(0); + } + + void ReadFile(MachOFile *file, + bool expect_parse_success, + cpu_type_t expected_cpu_type, + cpu_subtype_t expected_cpu_subtype) { + ASSERT_TRUE(file->GetContents(&file_contents)); + file_bytes = reinterpret_cast<const uint8_t *>(file_contents.data()); + if (expect_parse_success) { + EXPECT_TRUE(reader.Read(file_bytes, + file_contents.size(), + expected_cpu_type, + expected_cpu_subtype)); + } else { + EXPECT_FALSE(reader.Read(file_bytes, + file_contents.size(), + expected_cpu_type, + expected_cpu_subtype)); + } + } + + string file_contents; + const uint8_t *file_bytes; + MockReaderReporter reporter; + Reader reader; + MockLoadCommandHandler load_command_handler; + MockSectionHandler section_handler; +}; + +class ReaderTest: public ReaderFixture, public Test { }; + +TEST_F(ReaderTest, BadMagic) { + WithConfiguration config(kLittleEndian, 32); + const cpu_type_t kCPUType = 0x46b760df; + const cpu_subtype_t kCPUSubType = 0x76a0e7f7; + MachOFile file; + file + .D32(0x67bdebe1) // Not a proper magic number. + .D32(kCPUType) // cpu type + .D32(kCPUSubType) // cpu subtype + .D32(0x149fc717) // file type + .D32(0) // no load commands + .D32(0) // they occupy no bytes + .D32(0x80e71d64) // flags + .D32(0); // reserved + EXPECT_CALL(reporter, BadHeader()).WillOnce(Return()); + ReadFile(&file, false, CPU_TYPE_ANY, kCPUSubType); +} + +TEST_F(ReaderTest, MismatchedMagic) { + WithConfiguration config(kLittleEndian, 32); + const cpu_type_t kCPUType = CPU_TYPE_I386; + const cpu_subtype_t kCPUSubType = CPU_SUBTYPE_X86_ALL; + MachOFile file; + file + .D32(MH_CIGAM) // Right magic, but winds up wrong + // due to bitswapping + .D32(kCPUType) // cpu type + .D32(kCPUSubType) // cpu subtype + .D32(0x149fc717) // file type + .D32(0) // no load commands + .D32(0) // they occupy no bytes + .D32(0x80e71d64) // flags + .D32(0); // reserved + EXPECT_CALL(reporter, BadHeader()).WillOnce(Return()); + ReadFile(&file, false, kCPUType, kCPUSubType); +} + +TEST_F(ReaderTest, ShortMagic) { + WithConfiguration config(kBigEndian, 32); + MachOFile file; + file + .D16(0xfeed); // magic number + // truncated! + EXPECT_CALL(reporter, HeaderTruncated()).WillOnce(Return()); + ReadFile(&file, false, CPU_TYPE_ANY, 0); +} + +TEST_F(ReaderTest, ShortHeader) { + WithConfiguration config(kBigEndian, 32); + const cpu_type_t kCPUType = CPU_TYPE_ANY; + const cpu_subtype_t kCPUSubType = 0x76a0e7f7; + MachOFile file; + file + .D32(0xfeedface) // magic number + .D32(kCPUType) // cpu type + .D32(kCPUSubType) // cpu subtype + .D32(0x149fc717) // file type + .D32(0) // no load commands + .D32(0); // they occupy no bytes + EXPECT_CALL(reporter, HeaderTruncated()).WillOnce(Return()); + ReadFile(&file, false, CPU_TYPE_ANY, kCPUSubType); +} + +TEST_F(ReaderTest, MismatchedCPU) { + WithConfiguration config(kBigEndian, 32); + const cpu_type_t kCPUType = CPU_TYPE_I386; + const cpu_subtype_t kCPUSubType = CPU_SUBTYPE_X86_ALL; + MachOFile file; + file + .D32(MH_MAGIC) // Right magic for PPC (once bitswapped) + .D32(kCPUType) // cpu type + .D32(kCPUSubType) // cpu subtype + .D32(0x149fc717) // file type + .D32(0) // no load commands + .D32(0) // they occupy no bytes + .D32(0x80e71d64) // flags + .D32(0); // reserved + EXPECT_CALL(reporter, + CPUTypeMismatch(CPU_TYPE_I386, CPU_SUBTYPE_X86_ALL, + CPU_TYPE_POWERPC, CPU_SUBTYPE_POWERPC_ALL)) + .WillOnce(Return()); + ReadFile(&file, false, CPU_TYPE_POWERPC, CPU_SUBTYPE_POWERPC_ALL); +} + +TEST_F(ReaderTest, LittleEndian32Bit) { + WithConfiguration config(kLittleEndian, 32); + const cpu_type_t kCPUType = 0x46b760df; + const cpu_subtype_t kCPUSubType = 0x76a0e7f7; + MachOFile file; + file + .D32(0xfeedface) // magic number + .D32(kCPUType) // cpu type + .D32(kCPUSubType) // cpu subtype + .D32(0x149fc717) // file type + .D32(0) // no load commands + .D32(0) // they occupy no bytes + .D32(0x80e71d64) // flags + .D32(0); // reserved + ReadFile(&file, true, CPU_TYPE_ANY, kCPUSubType); + EXPECT_FALSE(reader.bits_64()); + EXPECT_FALSE(reader.big_endian()); + EXPECT_EQ(kCPUType, reader.cpu_type()); + EXPECT_EQ(kCPUSubType, reader.cpu_subtype()); + EXPECT_EQ(FileType(0x149fc717), reader.file_type()); + EXPECT_EQ(FileFlags(0x80e71d64), reader.flags()); +} + +TEST_F(ReaderTest, LittleEndian64Bit) { + WithConfiguration config(kLittleEndian, 64); + const cpu_type_t kCPUType = 0x46b760df; + const cpu_subtype_t kCPUSubType = 0x76a0e7f7; + MachOFile file; + file + .D32(0xfeedfacf) // magic number + .D32(kCPUType) // cpu type + .D32(kCPUSubType) // cpu subtype + .D32(0x149fc717) // file type + .D32(0) // no load commands + .D32(0) // they occupy no bytes + .D32(0x80e71d64) // flags + .D32(0); // reserved + ReadFile(&file, true, CPU_TYPE_ANY, kCPUSubType); + EXPECT_TRUE(reader.bits_64()); + EXPECT_FALSE(reader.big_endian()); + EXPECT_EQ(kCPUType, reader.cpu_type()); + EXPECT_EQ(kCPUSubType, reader.cpu_subtype()); + EXPECT_EQ(FileType(0x149fc717), reader.file_type()); + EXPECT_EQ(FileFlags(0x80e71d64), reader.flags()); +} + +TEST_F(ReaderTest, BigEndian32Bit) { + WithConfiguration config(kBigEndian, 32); + const cpu_type_t kCPUType = 0x46b760df; + const cpu_subtype_t kCPUSubType = 0x76a0e7f7; + MachOFile file; + file + .D32(0xfeedface) // magic number + .D32(kCPUType) // cpu type + .D32(kCPUSubType) // cpu subtype + .D32(0x149fc717) // file type + .D32(0) // no load commands + .D32(0) // they occupy no bytes + .D32(0x80e71d64) // flags + .D32(0); // reserved + ReadFile(&file, true, CPU_TYPE_ANY, kCPUSubType); + EXPECT_FALSE(reader.bits_64()); + EXPECT_TRUE(reader.big_endian()); + EXPECT_EQ(kCPUType, reader.cpu_type()); + EXPECT_EQ(kCPUSubType, reader.cpu_subtype()); + EXPECT_EQ(FileType(0x149fc717), reader.file_type()); + EXPECT_EQ(FileFlags(0x80e71d64), reader.flags()); +} + +TEST_F(ReaderTest, BigEndian64Bit) { + WithConfiguration config(kBigEndian, 64); + const cpu_type_t kCPUType = 0x46b760df; + const cpu_subtype_t kCPUSubType = 0x76a0e7f7; + MachOFile file; + file + .D32(0xfeedfacf) // magic number + .D32(kCPUType) // cpu type + .D32(kCPUSubType) // cpu subtype + .D32(0x149fc717) // file type + .D32(0) // no load commands + .D32(0) // they occupy no bytes + .D32(0x80e71d64) // flags + .D32(0); // reserved + ReadFile(&file, true, CPU_TYPE_ANY, kCPUSubType); + EXPECT_TRUE(reader.bits_64()); + EXPECT_TRUE(reader.big_endian()); + EXPECT_EQ(kCPUType, reader.cpu_type()); + EXPECT_EQ(kCPUSubType, reader.cpu_subtype()); + EXPECT_EQ(FileType(0x149fc717), reader.file_type()); + EXPECT_EQ(FileFlags(0x80e71d64), reader.flags()); +} + + +// Load command tests. + +class LoadCommand: public ReaderFixture, public Test { }; + +TEST_F(LoadCommand, RegionTruncated) { + WithConfiguration config(kBigEndian, 64); + const cpu_type_t kCPUType = 0x46b760df; + const cpu_subtype_t kCPUSubType = 0x76a0e7f7; + MachOFile file; + file + .D32(0xfeedfacf) // magic number + .D32(kCPUType) // cpu type + .D32(kCPUSubType) // cpu subtype + .D32(0x149fc717) // file type + .D32(1) // one load command + .D32(40) // occupying 40 bytes + .D32(0x80e71d64) // flags + .D32(0) // reserved + .Append(20, 0); // load command region, not as long as + // Mach-O header promised + + EXPECT_CALL(reporter, LoadCommandRegionTruncated()).WillOnce(Return()); + + ReadFile(&file, false, CPU_TYPE_ANY, kCPUSubType); +} + +TEST_F(LoadCommand, None) { + WithConfiguration config(kLittleEndian, 32); + LoadCommands load_commands; + MachOFile file; + file.Header(&load_commands); + + ReadFile(&file, true, CPU_TYPE_X86, CPU_SUBTYPE_I386_ALL); + + EXPECT_FALSE(reader.bits_64()); + EXPECT_FALSE(reader.big_endian()); + EXPECT_EQ(CPU_TYPE_X86, reader.cpu_type()); + EXPECT_EQ(CPU_SUBTYPE_I386_ALL, reader.cpu_subtype()); + EXPECT_EQ(MH_EXECUTE, reader.file_type()); + EXPECT_EQ(FileFlags(MH_TWOLEVEL | + MH_DYLDLINK | + MH_NOUNDEFS), + FileFlags(reader.flags())); + + EXPECT_TRUE(reader.WalkLoadCommands(&load_command_handler)); +} + +TEST_F(LoadCommand, Unknown) { + WithConfiguration config(kBigEndian, 32); + LoadCommands load_commands; + load_commands + .CountCommand() + .D32(0x33293d4a) // unknown load command + .D32(40) // total size in bytes + .Append(32, '*'); // dummy data + MachOFile file; + file.Header(&load_commands); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + EXPECT_FALSE(reader.bits_64()); + EXPECT_TRUE(reader.big_endian()); + EXPECT_EQ(CPU_TYPE_X86, reader.cpu_type()); + EXPECT_EQ(CPU_SUBTYPE_I386_ALL, reader.cpu_subtype()); + EXPECT_EQ(MH_EXECUTE, reader.file_type()); + EXPECT_EQ(FileFlags(MH_TWOLEVEL | + MH_DYLDLINK | + MH_NOUNDEFS), + reader.flags()); + + ByteBuffer expected; + expected.start = file_bytes + load_commands.start().Value(); + expected.end = expected.start + load_commands.final_size().Value(); + EXPECT_CALL(load_command_handler, UnknownCommand(0x33293d4a, + expected)) + .WillOnce(Return(true)); + + EXPECT_TRUE(reader.WalkLoadCommands(&load_command_handler)); +} + +TEST_F(LoadCommand, TypeIncomplete) { + WithConfiguration config(kLittleEndian, 32); + LoadCommands load_commands; + load_commands + .CountCommand() + .Append(3, 0); // load command type, incomplete + + MachOFile file; + file.Header(&load_commands); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + EXPECT_CALL(reporter, LoadCommandsOverrun(1, 0, 0)) + .WillOnce(Return()); + EXPECT_FALSE(reader.WalkLoadCommands(&load_command_handler)); +} + +TEST_F(LoadCommand, LengthIncomplete) { + WithConfiguration config(kBigEndian, 64); + LoadCommands load_commands; + load_commands + .CountCommand() + .D32(LC_SEGMENT); // load command + // no length + MachOFile file; + file.Header(&load_commands); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + EXPECT_CALL(reporter, LoadCommandsOverrun(1, 0, LC_SEGMENT)) + .WillOnce(Return()); + EXPECT_FALSE(reader.WalkLoadCommands(&load_command_handler)); +} + +TEST_F(LoadCommand, ContentIncomplete) { + WithConfiguration config(kLittleEndian, 64); + LoadCommands load_commands; + load_commands + .CountCommand() + .D32(LC_SEGMENT) // load command + .D32(40) // total size in bytes + .Append(28, '*'); // not enough dummy data + MachOFile file; + file.Header(&load_commands); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + EXPECT_CALL(reporter, LoadCommandsOverrun(1, 0, LC_SEGMENT)) + .WillOnce(Return()); + EXPECT_FALSE(reader.WalkLoadCommands(&load_command_handler)); +} + +TEST_F(LoadCommand, SegmentBE32) { + WithConfiguration config(kBigEndian, 32); + LoadedSection segment; + segment.address() = 0x1891139c; + segment.Append(42, '*'); // segment contents + SegmentLoadCommand segment_command; + segment_command + .Header("froon", segment, 0x94d6dd22, 0x8bdbc319, 0x990a16dd); + segment_command.vmsize() = 0xcb76584fU; + LoadCommands load_commands; + load_commands.Place(&segment_command); + MachOFile file; + file + .Header(&load_commands) + .Place(&segment); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + Segment actual_segment; + EXPECT_CALL(load_command_handler, SegmentCommand(_)) + .WillOnce(DoAll(SaveArg<0>(&actual_segment), + Return(true))); + EXPECT_TRUE(reader.WalkLoadCommands(&load_command_handler)); + + EXPECT_EQ(false, actual_segment.bits_64); + EXPECT_EQ("froon", actual_segment.name); + EXPECT_EQ(0x1891139cU, actual_segment.vmaddr); + EXPECT_EQ(0xcb76584fU, actual_segment.vmsize); + EXPECT_EQ(0x94d6dd22U, actual_segment.maxprot); + EXPECT_EQ(0x8bdbc319U, actual_segment.initprot); + EXPECT_EQ(0x990a16ddU, actual_segment.flags); + EXPECT_EQ(0U, actual_segment.nsects); + EXPECT_EQ(0U, actual_segment.section_list.Size()); + EXPECT_EQ(segment.final_size().Value(), actual_segment.contents.Size()); +} + +TEST_F(LoadCommand, SegmentLE32) { + WithConfiguration config(kLittleEndian, 32); + LoadedSection segment; + segment.address() = 0x4b877866; + segment.Append(42, '*'); // segment contents + SegmentLoadCommand segment_command; + segment_command + .Header("sixteenprecisely", segment, + 0x350759ed, 0x6cf5a62e, 0x990a16dd); + segment_command.vmsize() = 0xcb76584fU; + LoadCommands load_commands; + load_commands.Place(&segment_command); + MachOFile file; + file + .Header(&load_commands) + .Place(&segment); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + Segment actual_segment; + EXPECT_CALL(load_command_handler, SegmentCommand(_)) + .WillOnce(DoAll(SaveArg<0>(&actual_segment), + Return(true))); + EXPECT_TRUE(reader.WalkLoadCommands(&load_command_handler)); + + EXPECT_EQ(false, actual_segment.bits_64); + EXPECT_EQ("sixteenprecisely", actual_segment.name); + EXPECT_EQ(0x4b877866U, actual_segment.vmaddr); + EXPECT_EQ(0xcb76584fU, actual_segment.vmsize); + EXPECT_EQ(0x350759edU, actual_segment.maxprot); + EXPECT_EQ(0x6cf5a62eU, actual_segment.initprot); + EXPECT_EQ(0x990a16ddU, actual_segment.flags); + EXPECT_EQ(0U, actual_segment.nsects); + EXPECT_EQ(0U, actual_segment.section_list.Size()); + EXPECT_EQ(segment.final_size().Value(), actual_segment.contents.Size()); +} + +TEST_F(LoadCommand, SegmentBE64) { + WithConfiguration config(kBigEndian, 64); + LoadedSection segment; + segment.address() = 0x79f484f77009e511ULL; + segment.Append(42, '*'); // segment contents + SegmentLoadCommand segment_command; + segment_command + .Header("froon", segment, 0x42b45da5, 0x8bdbc319, 0xb2335220); + segment_command.vmsize() = 0x8d92397ce6248abaULL; + LoadCommands load_commands; + load_commands.Place(&segment_command); + MachOFile file; + file + .Header(&load_commands) + .Place(&segment); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + Segment actual_segment; + EXPECT_CALL(load_command_handler, SegmentCommand(_)) + .WillOnce(DoAll(SaveArg<0>(&actual_segment), + Return(true))); + EXPECT_TRUE(reader.WalkLoadCommands(&load_command_handler)); + + EXPECT_EQ(true, actual_segment.bits_64); + EXPECT_EQ("froon", actual_segment.name); + EXPECT_EQ(0x79f484f77009e511ULL, actual_segment.vmaddr); + EXPECT_EQ(0x8d92397ce6248abaULL, actual_segment.vmsize); + EXPECT_EQ(0x42b45da5U, actual_segment.maxprot); + EXPECT_EQ(0x8bdbc319U, actual_segment.initprot); + EXPECT_EQ(0xb2335220U, actual_segment.flags); + EXPECT_EQ(0U, actual_segment.nsects); + EXPECT_EQ(0U, actual_segment.section_list.Size()); + EXPECT_EQ(segment.final_size().Value(), actual_segment.contents.Size()); +} + +TEST_F(LoadCommand, SegmentLE64) { + WithConfiguration config(kLittleEndian, 64); + LoadedSection segment; + segment.address() = 0x50c0501dc5922d35ULL; + segment.Append(42, '*'); // segment contents + SegmentLoadCommand segment_command; + segment_command + .Header("sixteenprecisely", segment, + 0x917c339d, 0xdbc446fa, 0xb650b563); + segment_command.vmsize() = 0x84ae73e7c75469bfULL; + LoadCommands load_commands; + load_commands.Place(&segment_command); + MachOFile file; + file + .Header(&load_commands) + .Place(&segment); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + Segment actual_segment; + EXPECT_CALL(load_command_handler, SegmentCommand(_)) + .WillOnce(DoAll(SaveArg<0>(&actual_segment), + Return(true))); + EXPECT_TRUE(reader.WalkLoadCommands(&load_command_handler)); + + EXPECT_EQ(true, actual_segment.bits_64); + EXPECT_EQ("sixteenprecisely", actual_segment.name); + EXPECT_EQ(0x50c0501dc5922d35ULL, actual_segment.vmaddr); + EXPECT_EQ(0x84ae73e7c75469bfULL, actual_segment.vmsize); + EXPECT_EQ(0x917c339dU, actual_segment.maxprot); + EXPECT_EQ(0xdbc446faU, actual_segment.initprot); + EXPECT_EQ(0xb650b563U, actual_segment.flags); + EXPECT_EQ(0U, actual_segment.nsects); + EXPECT_EQ(0U, actual_segment.section_list.Size()); + EXPECT_EQ(segment.final_size().Value(), actual_segment.contents.Size()); +} + +TEST_F(LoadCommand, SegmentCommandTruncated) { + WithConfiguration config(kBigEndian, 32); + LoadedSection segment_contents; + segment_contents.Append(20, '*'); // lah di dah + SizedSection command; + command + .D32(LC_SEGMENT) // command type + .D32(command.final_size()) // command size + .AppendCString("too-short", 16) // segment name + .D32(0x9c759211) // vmaddr + .D32(segment_contents.final_size()) // vmsize + .D32(segment_contents.start()) // file offset + .D32(segment_contents.final_size()) // file size + .D32(0x56f28446) // max protection + .D32(0xe7910dcb) // initial protection + .D32(0) // no sections + .Append(3, 0); // flags (one byte short!) + LoadCommands load_commands; + load_commands.Place(&command); + MachOFile file; + file + .Header(&load_commands) + .Place(&segment_contents); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + EXPECT_CALL(reporter, LoadCommandTooShort(0, LC_SEGMENT)) + .WillOnce(Return()); + + EXPECT_FALSE(reader.WalkLoadCommands(&load_command_handler)); +} + +TEST_F(LoadCommand, SegmentBadContentOffset) { + WithConfiguration config(kLittleEndian, 32); + // Instead of letting a Place call set the segment's file offset and size, + // set them ourselves, to check that the parser catches invalid offsets + // instead of handing us bogus pointers. + LoadedSection segment; + segment.address() = 0x4db5489c; + segment.start() = 0x7e189e76; // beyond end of file + segment.final_size() = 0x98b9c3ab; + SegmentLoadCommand segment_command; + segment_command + .Header("notmerelyfifteen", segment, 0xcbab25ee, 0x359a20db, 0x68a3933f); + LoadCommands load_commands; + load_commands.Place(&segment_command); + MachOFile file; + file.Header(&load_commands); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + EXPECT_CALL(reporter, MisplacedSegmentData("notmerelyfifteen")) + .WillOnce(Return()); + + EXPECT_FALSE(reader.WalkLoadCommands(&load_command_handler)); +} + +TEST_F(LoadCommand, ThreeLoadCommands) { + WithConfiguration config(kBigEndian, 32); + LoadedSection seg1, seg2, seg3; + SegmentLoadCommand cmd1, cmd2, cmd3; + + seg1.Append(128, '@'); + seg1.address() = 0xa7f61ef6; + cmd1.Header("head", seg1, 0x88bf1cc7, 0x889a26a4, 0xe9b80d87); + // Include some dummy data at the end of the load command. Since we + // didn't claim to have any sections, the reader should ignore this. But + // making sure the commands have different lengths ensures that we're + // using the right command's length to advance the LoadCommandIterator. + cmd1.Append(128, '!'); + + seg2.Append(42, '*'); + seg2.address() = 0xc70fc909; + cmd2.Header("thorax", seg2, 0xde7327f4, 0xfdaf771d, 0x65e74b30); + // More dummy data at the end of the load command. + cmd2.Append(32, '^'); + + seg3.Append(42, '%'); + seg3.address() = 0x46b3ab05; + cmd3.Header("abdomen", seg3, 0x7098b70d, 0x8d8d7728, 0x5131419b); + // More dummy data at the end of the load command. + cmd3.Append(64, '&'); + + LoadCommands load_commands; + load_commands.Place(&cmd1).Place(&cmd2).Place(&cmd3); + + MachOFile file; + file.Header(&load_commands).Place(&seg1).Place(&seg2).Place(&seg3); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + { + InSequence s; + EXPECT_CALL(load_command_handler, + SegmentCommand(Field(&Segment::name, "head"))) + .WillOnce(Return(true)); + EXPECT_CALL(load_command_handler, + SegmentCommand(Field(&Segment::name, "thorax"))) + .WillOnce(Return(true)); + EXPECT_CALL(load_command_handler, + SegmentCommand(Field(&Segment::name, "abdomen"))) + .WillOnce(Return(true)); + } + + EXPECT_TRUE(reader.WalkLoadCommands(&load_command_handler)); +} + +static inline Matcher<const Section &> MatchSection( + Matcher<bool> bits_64, + Matcher<const string &> section_name, + Matcher<const string &> segment_name, + Matcher<uint64_t> address, + Matcher<uint32_t> alignment, + Matcher<uint32_t> flags, + Matcher<const ByteBuffer &> contents) { + return AllOf(AllOf(Field(&Section::bits_64, bits_64), + Field(&Section::section_name, section_name), + Field(&Section::segment_name, segment_name), + Field(&Section::address, address)), + AllOf(Field(&Section::align, alignment), + Field(&Section::flags, flags), + Field(&Section::contents, contents))); +} + +static inline Matcher<const Section &> MatchSection( + Matcher<bool> bits_64, + Matcher<const string &> section_name, + Matcher<const string &> segment_name, + Matcher<uint64_t> address) { + return AllOf(Field(&Section::bits_64, bits_64), + Field(&Section::section_name, section_name), + Field(&Section::segment_name, segment_name), + Field(&Section::address, address)); +} + +TEST_F(LoadCommand, OneSegmentTwoSections) { + WithConfiguration config(kBigEndian, 64); + + // Create some sections with some data. + LoadedSection section1, section2; + section1.Append("buddha's hand"); + section2.Append("kumquat"); + + // Create a segment to hold them. + LoadedSection segment; + segment.address() = 0xe1d0eeec; + segment.Place(§ion2).Place(§ion1); + + SegmentLoadCommand segment_command; + segment_command + .Header("head", segment, 0x92c9568c, 0xa89f2627, 0x4dc7a1e2) + .AppendSectionEntry("mandarin", "kishu", 12, 0x8cd4604bU, section1) + .AppendSectionEntry("bergamot", "cara cara", 12, 0x98746efaU, section2); + + LoadCommands commands; + commands.Place(&segment_command); + + MachOFile file; + file.Header(&commands).Place(&segment); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + Segment actual_segment; + EXPECT_CALL(load_command_handler, SegmentCommand(_)) + .WillOnce(DoAll(SaveArg<0>(&actual_segment), + Return(true))); + EXPECT_TRUE(reader.WalkLoadCommands(&load_command_handler)); + + { + InSequence s; + ByteBuffer contents1; + contents1.start = file_bytes + section1.start().Value(); + contents1.end = contents1.start + section1.final_size().Value(); + EXPECT_EQ("buddha's hand", + string(reinterpret_cast<const char *>(contents1.start), + contents1.Size())); + EXPECT_CALL(section_handler, + HandleSection(MatchSection(true, "mandarin", "kishu", + section1.address().Value(), 12, + 0x8cd4604bU, contents1))) + .WillOnce(Return(true)); + + ByteBuffer contents2; + contents2.start = file_bytes + section2.start().Value(); + contents2.end = contents2.start + section2.final_size().Value(); + EXPECT_EQ("kumquat", + string(reinterpret_cast<const char *>(contents2.start), + contents2.Size())); + EXPECT_CALL(section_handler, + HandleSection(MatchSection(true, "bergamot", "cara cara", + section2.address().Value(), 12, + 0x98746efaU, contents2))) + .WillOnce(Return(true)); + } + + EXPECT_TRUE(reader.WalkSegmentSections(actual_segment, §ion_handler)); +} + +TEST_F(LoadCommand, MisplacedSectionBefore) { + WithConfiguration config(kLittleEndian, 64); + + // The segment. + LoadedSection segment; + segment.address() = 0x696d83cc; + segment.Append(10, '0'); + + // The contents of the following sections don't matter, because + // we're not really going to Place them in segment; we're just going + // to set all their labels by hand to get the (impossible) + // configurations we want. + + // A section whose starting offset is before that of its section. + LoadedSection before; + before.Append(10, '1'); + before.start() = segment.start() - 1; + before.address() = segment.address() - 1; + before.final_size() = before.Size(); + + SegmentLoadCommand command; + command + .Header("segment", segment, 0x173baa29, 0x8407275d, 0xed8f7057) + .AppendSectionEntry("before", "segment", 0, 0x686c6921, before); + + LoadCommands commands; + commands.Place(&command); + + MachOFile file; + file.Header(&commands).Place(&segment); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + Segment actual_segment; + EXPECT_TRUE(reader.FindSegment("segment", &actual_segment)); + + EXPECT_CALL(reporter, MisplacedSectionData("before", "segment")) + .WillOnce(Return()); + EXPECT_FALSE(reader.WalkSegmentSections(actual_segment, §ion_handler)); +} + +TEST_F(LoadCommand, MisplacedSectionAfter) { + WithConfiguration config(kLittleEndian, 64); + + // The segment. + LoadedSection segment; + segment.address() = 0x696d83cc; + segment.Append(10, '0'); + + // The contents of the following sections don't matter, because + // we're not really going to Place them in segment; we're just going + // to set all their labels by hand to get the (impossible) + // configurations we want. + + // A section whose starting offset is after the end of its section. + LoadedSection after; + after.Append(10, '2'); + after.start() = segment.start() + 11; + after.address() = segment.address() + 11; + after.final_size() = after.Size(); + + SegmentLoadCommand command; + command + .Header("segment", segment, 0x173baa29, 0x8407275d, 0xed8f7057) + .AppendSectionEntry("after", "segment", 0, 0x2ee50124, after); + + LoadCommands commands; + commands.Place(&command); + + MachOFile file; + file.Header(&commands).Place(&segment); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + Segment actual_segment; + EXPECT_TRUE(reader.FindSegment("segment", &actual_segment)); + + EXPECT_CALL(reporter, MisplacedSectionData("after", "segment")) + .WillOnce(Return()); + EXPECT_FALSE(reader.WalkSegmentSections(actual_segment, §ion_handler)); +} + +TEST_F(LoadCommand, MisplacedSectionTooBig) { + WithConfiguration config(kLittleEndian, 64); + + // The segment. + LoadedSection segment; + segment.address() = 0x696d83cc; + segment.Append(10, '0'); + + // The contents of the following sections don't matter, because + // we're not really going to Place them in segment; we're just going + // to set all their labels by hand to get the (impossible) + // configurations we want. + + // A section that extends beyond the end of its section. + LoadedSection too_big; + too_big.Append(10, '3'); + too_big.start() = segment.start() + 1; + too_big.address() = segment.address() + 1; + too_big.final_size() = too_big.Size(); + + SegmentLoadCommand command; + command + .Header("segment", segment, 0x173baa29, 0x8407275d, 0xed8f7057) + .AppendSectionEntry("too big", "segment", 0, 0x8b53ae5c, too_big); + + LoadCommands commands; + commands.Place(&command); + + MachOFile file; + file.Header(&commands).Place(&segment); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + Segment actual_segment; + EXPECT_TRUE(reader.FindSegment("segment", &actual_segment)); + + EXPECT_CALL(reporter, MisplacedSectionData("too big", "segment")) + .WillOnce(Return()); + EXPECT_FALSE(reader.WalkSegmentSections(actual_segment, §ion_handler)); +} + + +// The segments in a .dSYM bundle's Mach-O file have their file offset +// and size set to zero, but the sections don't. The reader shouldn't +// report an error in this case. +TEST_F(LoadCommand, ZappedSegment) { + WithConfiguration config(kBigEndian, 32); + + // The segment. + LoadedSection segment; + segment.address() = 0x696d83cc; + segment.start() = 0; + segment.final_size() = 0; + + // The section. + LoadedSection section; + section.address() = segment.address(); + section.start() = 0; + section.final_size() = 1000; // extends beyond its segment + + SegmentLoadCommand command; + command + .Header("zapped", segment, 0x0861a5cb, 0x68ccff67, 0x0b66255c) + .AppendSectionEntry("twitching", "zapped", 0, 0x93b3bd42, section); + + LoadCommands commands; + commands.Place(&command); + + MachOFile file; + file.Header(&commands); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + Segment actual_segment; + EXPECT_TRUE(reader.FindSegment("zapped", &actual_segment)); + + ByteBuffer zapped_extent(NULL, 0); + EXPECT_CALL(section_handler, + HandleSection(MatchSection(false, "twitching", "zapped", + 0x696d83cc, 0, 0x93b3bd42, + zapped_extent))) + .WillOnce(Return(true)); + + EXPECT_TRUE(reader.WalkSegmentSections(actual_segment, §ion_handler)); +} + +TEST_F(LoadCommand, MapSegmentSections) { + WithConfiguration config(kLittleEndian, 32); + + // Create some sections with some data. + LoadedSection section1, section2, section3, section4; + section1.Append("buddha's hand"); + section2.start() = 0; // Section 2 is an S_ZEROFILL section. + section2.final_size() = 0; + section3.Append("shasta gold"); + section4.Append("satsuma"); + + // Create two segments to hold them. + LoadedSection segment1, segment2; + segment1.address() = 0x13e6c8a9; + segment1.Place(§ion3).Place(§ion1); + segment2.set_word_size(64); + segment2.address() = 0x04d462e2; + segment2.Place(§ion4); + section2.address() = segment2.address() + segment2.Size(); + + SegmentLoadCommand segment_command1, segment_command2; + segment_command1 + .Header("head", segment1, 0x67d955a6, 0x7a61c13e, 0xe3e50c64) + .AppendSectionEntry("mandarin", "head", 12, 0x5bb565d7, section1) + .AppendSectionEntry("bergamot", "head", 12, 0x8620de73, section3); + segment_command2.set_word_size(64); + segment_command2 + .Header("thorax", segment2, 0x7aab2419, 0xe908007f, 0x17961d33) + .AppendSectionEntry("sixteenprecisely", "thorax", + 12, S_ZEROFILL, section2) + .AppendSectionEntry("cara cara", "thorax", 12, 0xb6c5dd8a, section4); + + LoadCommands commands; + commands.Place(&segment_command1).Place(&segment_command2); + + MachOFile file; + file.Header(&commands).Place(&segment1).Place(&segment2); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + Segment segment; + SectionMap section_map; + + EXPECT_FALSE(reader.FindSegment("smoot", &segment)); + + ASSERT_TRUE(reader.FindSegment("thorax", &segment)); + ASSERT_TRUE(reader.MapSegmentSections(segment, §ion_map)); + + EXPECT_FALSE(section_map.find("sixteenpreciselyandthensome") + != section_map.end()); + EXPECT_FALSE(section_map.find("mandarin") != section_map.end()); + ASSERT_TRUE(section_map.find("cara cara") != section_map.end()); + EXPECT_THAT(section_map["cara cara"], + MatchSection(true, "cara cara", "thorax", 0x04d462e2)); + ASSERT_TRUE(section_map.find("sixteenprecisely") + != section_map.end()); + ByteBuffer sixteenprecisely_contents(NULL, 0); + EXPECT_THAT(section_map["sixteenprecisely"], + MatchSection(true, "sixteenprecisely", "thorax", + 0x04d462e2 + 7, 12, S_ZEROFILL, + sixteenprecisely_contents)); + + ASSERT_TRUE(reader.FindSegment("head", &segment)); + ASSERT_TRUE(reader.MapSegmentSections(segment, §ion_map)); + + ASSERT_TRUE(section_map.find("mandarin") != section_map.end()); + EXPECT_THAT(section_map["mandarin"], + MatchSection(false, "mandarin", "head", 0x13e6c8a9 + 11)); + ASSERT_TRUE(section_map.find("bergamot") != section_map.end()); + EXPECT_THAT(section_map["bergamot"], + MatchSection(false, "bergamot", "head", 0x13e6c8a9)); +} + +TEST_F(LoadCommand, FindSegment) { + WithConfiguration config(kBigEndian, 32); + + LoadedSection segment1, segment2, segment3; + segment1.address() = 0xb8ae5752; + segment1.Append("Some contents!"); + segment2.address() = 0xd6b0ce83; + segment2.Append("Different stuff."); + segment3.address() = 0x7374fd2a; + segment3.Append("Further materials."); + + SegmentLoadCommand cmd1, cmd2, cmd3; + cmd1.Header("first", segment1, 0xfadb6932, 0x175bf529, 0x0de790ad); + cmd2.Header("second", segment2, 0xeef716e0, 0xe103a9d7, 0x7d38a8ef); + cmd3.Header("third", segment3, 0xe172b39e, 0x86012f07, 0x080ac94d); + + LoadCommands commands; + commands.Place(&cmd1).Place(&cmd2).Place(&cmd3); + + MachOFile file; + file.Header(&commands).Place(&segment1).Place(&segment2).Place(&segment3); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + Segment actual_segment; + + EXPECT_FALSE(reader.FindSegment("murphy", &actual_segment)); + + EXPECT_TRUE(reader.FindSegment("second", &actual_segment)); + EXPECT_EQ(0xd6b0ce83, actual_segment.vmaddr); +} + + +// Symtab tests. + +// A StringAssembler is a class for generating .stabstr sections to present +// as input to the STABS parser. +class StringAssembler: public SizedSection { + public: + // Add the string S to this StringAssembler, and return the string's + // offset within this compilation unit's strings. + size_t Add(const string &s) { + size_t offset = Size(); + AppendCString(s); + return offset; + } +}; + +// A SymbolAssembler is a class for generating .stab sections to present as +// test input for the STABS parser. +class SymbolAssembler: public SizedSection { + public: + // Create a SymbolAssembler that uses StringAssembler for its strings. + explicit SymbolAssembler(StringAssembler *string_assembler) + : string_assembler_(string_assembler), + entry_count_(0) { } + + // Append a STAB entry to the end of this section with the given + // characteristics. NAME is the offset of this entry's name string within + // its compilation unit's portion of the .stabstr section; this can be a + // value generated by a StringAssembler. Return a reference to this + // SymbolAssembler. + SymbolAssembler &Symbol(uint8_t type, uint8_t other, Label descriptor, + Label value, Label name) { + D32(name); + D8(type); + D8(other); + D16(descriptor); + Append(endianness(), word_size_ / 8, value); + entry_count_++; + return *this; + } + + // As above, but automatically add NAME to our StringAssembler. + SymbolAssembler &Symbol(uint8_t type, uint8_t other, Label descriptor, + Label value, const string &name) { + return Symbol(type, other, descriptor, value, string_assembler_->Add(name)); + } + + private: + // The strings for our STABS entries. + StringAssembler *string_assembler_; + + // The number of entries in this compilation unit so far. + size_t entry_count_; +}; + +class Symtab: public ReaderFixture, public Test { }; + +TEST_F(Symtab, Symtab32) { + WithConfiguration config(kLittleEndian, 32); + + StringAssembler strings; + SymbolAssembler symbols(&strings); + symbols + .Symbol(0x52, 0x7c, 0x3470, 0x9bb02e7c, "hrududu") + .Symbol(0x50, 0x90, 0x7520, 0x1122525d, "Frith"); + + SizedSection symtab_command; + symtab_command + .D32(LC_SYMTAB) // command + .D32(symtab_command.final_size()) // size + .D32(symbols.start()) // file offset of symbols + .D32(2) // symbol count + .D32(strings.start()) // file offset of strings + .D32(strings.final_size()); // strings size + + LoadCommands load_commands; + load_commands.Place(&symtab_command); + + MachOFile file; + file.Header(&load_commands).Place(&symbols).Place(&strings); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + ByteBuffer symbols_found, strings_found; + EXPECT_CALL(load_command_handler, SymtabCommand(_, _)) + .WillOnce(DoAll(SaveArg<0>(&symbols_found), + SaveArg<1>(&strings_found), + Return(true))); + EXPECT_TRUE(reader.WalkLoadCommands(&load_command_handler)); + + EXPECT_EQ(24U, symbols_found.Size()); + EXPECT_EQ(14U, strings_found.Size()); +} + +TEST_F(Symtab, Symtab64) { + WithConfiguration config(kBigEndian, 64); + + StringAssembler strings; + SymbolAssembler symbols(&strings); + symbols + .Symbol(0xa7, 0xaf, 0x03af, 0x42f3072c74335181ULL, "foo") + .Symbol(0xb0, 0x9a, 0x2aa7, 0x2e2d349b3d5744a0ULL, "bar"); + + SizedSection symtab_command; + symtab_command + .D32(LC_SYMTAB) // command + .D32(symtab_command.final_size()) // size + .D32(symbols.start()) // file offset of symbols + .D32(2) // symbol count + .D32(strings.start()) // file offset of strings + .D32(strings.final_size()); // strings size + + LoadCommands load_commands; + load_commands.Place(&symtab_command); + + MachOFile file; + file.Header(&load_commands).Place(&symbols).Place(&strings); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + ByteBuffer symbols_found, strings_found; + EXPECT_CALL(load_command_handler, SymtabCommand(_, _)) + .WillOnce(DoAll(SaveArg<0>(&symbols_found), + SaveArg<1>(&strings_found), + Return(true))); + EXPECT_TRUE(reader.WalkLoadCommands(&load_command_handler)); + + EXPECT_EQ(32U, symbols_found.Size()); + EXPECT_EQ(8U, strings_found.Size()); +} + +TEST_F(Symtab, SymtabMisplacedSymbols) { + WithConfiguration config(kBigEndian, 32); + + StringAssembler strings; + SymbolAssembler symbols(&strings); + symbols + .Symbol(0xa7, 0xaf, 0x03af, 0x42f3072c74335181ULL, "foo") + .Symbol(0xb0, 0x9a, 0x2aa7, 0x2e2d349b3d5744a0ULL, "bar"); + + SizedSection symtab_command; + symtab_command + .D32(LC_SYMTAB) // command + .D32(symtab_command.final_size()) // size + .D32(symbols.start()) // file offset of symbols + .D32(3) // symbol count (too many) + .D32(strings.start()) // file offset of strings + .D32(strings.final_size()); // strings size + + LoadCommands load_commands; + load_commands.Place(&symtab_command); + + MachOFile file; + // Put symbols at end, so the excessive length will be noticed. + file.Header(&load_commands).Place(&strings).Place(&symbols); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + EXPECT_CALL(reporter, MisplacedSymbolTable()).Times(1); + EXPECT_FALSE(reader.WalkLoadCommands(&load_command_handler)); +} + +TEST_F(Symtab, SymtabMisplacedStrings) { + WithConfiguration config(kLittleEndian, 32); + + StringAssembler strings; + SymbolAssembler symbols(&strings); + symbols + .Symbol(0xa7, 0xaf, 0x03af, 0x42f3072c74335181ULL, "foo") + .Symbol(0xb0, 0x9a, 0x2aa7, 0x2e2d349b3d5744a0ULL, "bar"); + + SizedSection symtab_command; + symtab_command + .D32(LC_SYMTAB) // command + .D32(symtab_command.final_size()) // size + .D32(symbols.start()) // file offset of symbols + .D32(2) // symbol count + .D32(strings.start()) // file offset of strings + .D32(strings.final_size() + 1); // strings size (too long) + + LoadCommands load_commands; + load_commands.Place(&symtab_command); + + MachOFile file; + // Put strings at end, so the excessive length will be noticed. + file.Header(&load_commands).Place(&symbols).Place(&strings); + + ReadFile(&file, true, CPU_TYPE_ANY, 0); + + EXPECT_CALL(reporter, MisplacedSymbolTable()).Times(1); + EXPECT_FALSE(reader.WalkLoadCommands(&load_command_handler)); +} + diff --git a/src/common/stabs_reader_unittest.cc b/src/common/stabs_reader_unittest.cc index 9d2f88cc..9461ac0c 100644 --- a/src/common/stabs_reader_unittest.cc +++ b/src/common/stabs_reader_unittest.cc @@ -56,10 +56,10 @@ using ::testing::Test; using ::testing::_; using google_breakpad::StabsHandler; using google_breakpad::StabsReader; -using google_breakpad::TestAssembler::Label; -using google_breakpad::TestAssembler::Section; -using google_breakpad::TestAssembler::kBigEndian; -using google_breakpad::TestAssembler::kLittleEndian; +using google_breakpad::test_assembler::Label; +using google_breakpad::test_assembler::Section; +using google_breakpad::test_assembler::kBigEndian; +using google_breakpad::test_assembler::kLittleEndian; using std::map; using std::string; diff --git a/src/common/test_assembler.cc b/src/common/test_assembler.cc index 54092f37..261691b0 100644 --- a/src/common/test_assembler.cc +++ b/src/common/test_assembler.cc @@ -32,14 +32,15 @@ // test_assembler.cc: Implementation of google_breakpad::TestAssembler. // See test_assembler.h for details. -#include <cassert> -#include <cstdio> +#include <assert.h> +#include <stdio.h> + #include <iterator> #include "common/test_assembler.h" namespace google_breakpad { -namespace TestAssembler { +namespace test_assembler { using std::back_insert_iterator; @@ -201,7 +202,7 @@ void Label::Binding::Get(Binding **base, u_int64_t *addend) { } template<typename Inserter> -static inline void InsertEndian(TestAssembler::Endianness endianness, +static inline void InsertEndian(test_assembler::Endianness endianness, size_t size, u_int64_t number, Inserter dest) { assert(size > 0); if (endianness == kLittleEndian) { @@ -341,7 +342,7 @@ bool Section::GetContents(string *contents) { Reference &r = references_[i]; u_int64_t value; if (!r.label.IsKnownConstant(&value)) { - fprintf(stderr, "Undefined label #%d at offset 0x%x\n", i, r.offset); + fprintf(stderr, "Undefined label #%zu at offset 0x%zx\n", i, r.offset); return false; } assert(r.offset < contents_.size()); @@ -354,5 +355,5 @@ bool Section::GetContents(string *contents) { return true; } -} // namespace TestAssembler -} // namespace google_breakpad +} // namespace test_assembler +} // namespace google_breakpad diff --git a/src/common/test_assembler.h b/src/common/test_assembler.h index 19782b92..5ce6b0c8 100644 --- a/src/common/test_assembler.h +++ b/src/common/test_assembler.h @@ -68,7 +68,7 @@ using std::list; using std::string; using std::vector; -namespace TestAssembler { +namespace test_assembler { // A Label represents a value not yet known that we need to store in a // section. As long as all the labels a section refers to are defined @@ -475,7 +475,7 @@ class Section { Label start_; }; -} // namespace TestAssembler +} // namespace test_assembler } // namespace google_breakpad #endif // PROCESSOR_TEST_ASSEMBLER_H_ |