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Diffstat (limited to 'externals/breakpad/src/common/mac/macho_reader_unittest.cc')
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diff --git a/externals/breakpad/src/common/mac/macho_reader_unittest.cc b/externals/breakpad/src/common/mac/macho_reader_unittest.cc new file mode 100644 index 0000000000..4b5ac6ca01 --- /dev/null +++ b/externals/breakpad/src/common/mac/macho_reader_unittest.cc @@ -0,0 +1,1950 @@ +// Copyright 2010 Google LLC +// +// 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 LLC 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. + +#ifdef HAVE_CONFIG_H +#include <config.h> // Must come first +#endif + +#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& section, + 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& section)); +}; + + +// 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() { + 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())); + size_t fat_files_count; + const SuperFatArch* fat_files = reader.object_files(&fat_files_count); + object_files.resize(fat_files_count); + for (size_t i = 0; i < fat_files_count; ++i) { + EXPECT_TRUE(fat_files[i].ConvertToFatArch(&object_files[i])); + } + } + else + EXPECT_FALSE(reader.Read(fat_bytes, contents.size())); + } + test_assembler::Section fat; + MockFatReaderReporter reporter; + FatReader reader; + string contents; + const uint8_t* fat_bytes; + vector<struct fat_arch> object_files; +}; + +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& section_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(static_cast<uint32_t>(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(static_cast<uint32_t>(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_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_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 with 0 as is start address. + LoadedSection empty; + empty.Append(10, '4'); + empty.start() = 0; + empty.address() = segment.address() + 1; + empty.final_size() = empty.Size(); + + SegmentLoadCommand command; + command.Header("segment", segment, 0x173baa29, 0x8407275d, 0xed8f7057) + .AppendSectionEntry("empty", "segment", 0, 0x8b53ae5c, empty); + + 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("empty", "segment")).Times(0); + + EXPECT_CALL(section_handler, + HandleSection(MatchSection(true, "empty", "segment", + empty.address().Value()))) + .WillOnce(Return(true)); + + EXPECT_TRUE(reader.WalkSegmentSections(actual_segment, §ion_handler)); +} + +TEST_F(LoadCommand, MisplacedSectionButSectionIsEmpty) { + 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)); +} + |