Merge "Adjust DEX file reading to follow layout changes in ART." (8fbdbba9) · Commits · e / os / android_system_core

libunwindstack/DexFiles.cpp

+5 −3

Original line number	Diff line number	Diff line
		@@ -77,7 +77,8 @@ void DexFiles::SetArch(ArchEnum arch) {

		uint64_t DexFiles::ReadEntryPtr32(uint64_t addr) {
		uint32_t entry;
		if (!memory_->ReadFully(addr, &entry, sizeof(entry))) {
		const uint32_t field_offset = 12; // offset of first_entry_ in the descriptor struct.
		if (!memory_->ReadFully(addr + field_offset, &entry, sizeof(entry))) {
		return 0;
		}
		return entry;
		@@ -85,7 +86,8 @@ uint64_t DexFiles::ReadEntryPtr32(uint64_t addr) {

		uint64_t DexFiles::ReadEntryPtr64(uint64_t addr) {
		uint64_t entry;
		if (!memory_->ReadFully(addr, &entry, sizeof(entry))) {
		const uint32_t field_offset = 16; // offset of first_entry_ in the descriptor struct.
		if (!memory_->ReadFully(addr + field_offset, &entry, sizeof(entry))) {
		return 0;
		}
		return entry;
		@@ -122,7 +124,7 @@ void DexFiles::Init(Maps* maps) {
		initialized_ = true;
		entry_addr_ = 0;

		const std::string dex_debug_name("__art_debug_dexfiles");
		const std::string dex_debug_name("__dex_debug_descriptor");
		for (MapInfo* info : *maps) {
		if (!(info->flags & PROT_EXEC) \|\| !(info->flags & PROT_READ) \|\| info->offset != 0) {
		continue;

libunwindstack/tests/DexFilesTest.cpp

+27 −15

Original line number	Diff line number	Diff line
		@@ -63,7 +63,7 @@ class DexFilesTest : public ::testing::Test {
		elf->FakeSetValid(true);
		ElfInterfaceFake* interface = new ElfInterfaceFake(memory);
		elf->FakeSetInterface(interface);
		interface->FakeSetGlobalVariable("__art_debug_dexfiles", 0x800);
		interface->FakeSetGlobalVariable("__dex_debug_descriptor", 0x800);
		map_info->elf.reset(elf);

		// Global variable not set by default.
		@@ -74,7 +74,7 @@ class DexFilesTest : public ::testing::Test {
		elf->FakeSetValid(true);
		interface = new ElfInterfaceFake(memory);
		elf->FakeSetInterface(interface);
		interface->FakeSetGlobalVariable("__art_debug_dexfiles", 0x800);
		interface->FakeSetGlobalVariable("__dex_debug_descriptor", 0x800);
		map_info->elf.reset(elf);

		// Global variable set in this map.
		@@ -85,10 +85,12 @@ class DexFilesTest : public ::testing::Test {
		elf->FakeSetValid(true);
		interface = new ElfInterfaceFake(memory);
		elf->FakeSetInterface(interface);
		interface->FakeSetGlobalVariable("__art_debug_dexfiles", 0x800);
		interface->FakeSetGlobalVariable("__dex_debug_descriptor", 0x800);
		map_info->elf.reset(elf);
		}

		void WriteDescriptor32(uint64_t addr, uint32_t head);
		void WriteDescriptor64(uint64_t addr, uint64_t head);
		void WriteEntry32(uint64_t entry_addr, uint32_t next, uint32_t prev, uint32_t dex_file);
		void WriteEntry64(uint64_t entry_addr, uint64_t next, uint64_t prev, uint64_t dex_file);
		void WriteDex(uint64_t dex_file);
		@@ -105,6 +107,16 @@ class DexFilesTest : public ::testing::Test {
		std::unique_ptr<BufferMaps> maps_;
		};

		void DexFilesTest::WriteDescriptor32(uint64_t addr, uint32_t head) {
		// void* first_entry_
		memory_->SetData32(addr + 12, head);
		}

		void DexFilesTest::WriteDescriptor64(uint64_t addr, uint64_t head) {
		// void* first_entry_
		memory_->SetData64(addr + 16, head);
		}

		void DexFilesTest::WriteEntry32(uint64_t entry_addr, uint32_t next, uint32_t prev,
		uint32_t dex_file) {
		// Format of the 32 bit DEXFileEntry structure:
		@@ -146,7 +158,7 @@ TEST_F(DexFilesTest, get_method_information_32) {
		uint64_t method_offset = 0x124;
		MapInfo* info = maps_->Get(kMapDexFiles);

		memory_->SetData32(0xf800, 0x200000);
		WriteDescriptor32(0xf800, 0x200000);
		WriteEntry32(0x200000, 0, 0, 0x300000);
		WriteDex(0x300000);

		@@ -161,7 +173,7 @@ TEST_F(DexFilesTest, get_method_information_64) {
		MapInfo* info = maps_->Get(kMapDexFiles);

		dex_files_->SetArch(ARCH_ARM64);
		memory_->SetData64(0xf800, 0x200000);
		WriteDescriptor64(0xf800, 0x200000);
		WriteEntry64(0x200000, 0, 0, 0x301000);
		WriteDex(0x301000);

		@@ -175,7 +187,7 @@ TEST_F(DexFilesTest, get_method_information_not_first_entry_32) {
		uint64_t method_offset = 0x124;
		MapInfo* info = maps_->Get(kMapDexFiles);

		memory_->SetData32(0xf800, 0x200000);
		WriteDescriptor32(0xf800, 0x200000);
		WriteEntry32(0x200000, 0x200100, 0, 0x100000);
		WriteEntry32(0x200100, 0, 0x200000, 0x300000);
		WriteDex(0x300000);
		@@ -191,7 +203,7 @@ TEST_F(DexFilesTest, get_method_information_not_first_entry_64) {
		MapInfo* info = maps_->Get(kMapDexFiles);

		dex_files_->SetArch(ARCH_ARM64);
		memory_->SetData64(0xf800, 0x200000);
		WriteDescriptor64(0xf800, 0x200000);
		WriteEntry64(0x200000, 0x200100, 0, 0x100000);
		WriteEntry64(0x200100, 0, 0x200000, 0x300000);
		WriteDex(0x300000);
		@@ -206,7 +218,7 @@ TEST_F(DexFilesTest, get_method_information_cached) {
		uint64_t method_offset = 0x124;
		MapInfo* info = maps_->Get(kMapDexFiles);

		memory_->SetData32(0xf800, 0x200000);
		WriteDescriptor32(0xf800, 0x200000);
		WriteEntry32(0x200000, 0, 0, 0x300000);
		WriteDex(0x300000);

		@@ -226,7 +238,7 @@ TEST_F(DexFilesTest, get_method_information_search_libs) {
		uint64_t method_offset = 0x124;
		MapInfo* info = maps_->Get(kMapDexFiles);

		memory_->SetData32(0xf800, 0x200000);
		WriteDescriptor32(0xf800, 0x200000);
		WriteEntry32(0x200000, 0x200100, 0, 0x100000);
		WriteEntry32(0x200100, 0, 0x200000, 0x300000);
		WriteDex(0x300000);
		@@ -259,9 +271,9 @@ TEST_F(DexFilesTest, get_method_information_global_skip_zero_32) {
		MapInfo* info = maps_->Get(kMapDexFiles);

		// First global variable found, but value is zero.
		memory_->SetData32(0xc800, 0);
		WriteDescriptor32(0xc800, 0);

		memory_->SetData32(0xf800, 0x200000);
		WriteDescriptor32(0xf800, 0x200000);
		WriteEntry32(0x200000, 0, 0, 0x300000);
		WriteDex(0x300000);

		@@ -274,7 +286,7 @@ TEST_F(DexFilesTest, get_method_information_global_skip_zero_32) {
		dex_files_->SetArch(ARCH_ARM);
		method_name = "fail";
		method_offset = 0x123;
		memory_->SetData32(0xc800, 0x100000);
		WriteDescriptor32(0xc800, 0x100000);
		dex_files_->GetMethodInformation(maps_.get(), info, 0x300100, &method_name, &method_offset);
		EXPECT_EQ("fail", method_name);
		EXPECT_EQ(0x123U, method_offset);
		@@ -286,9 +298,9 @@ TEST_F(DexFilesTest, get_method_information_global_skip_zero_64) {
		MapInfo* info = maps_->Get(kMapDexFiles);

		// First global variable found, but value is zero.
		memory_->SetData64(0xc800, 0);
		WriteDescriptor64(0xc800, 0);

		memory_->SetData64(0xf800, 0x200000);
		WriteDescriptor64(0xf800, 0x200000);
		WriteEntry64(0x200000, 0, 0, 0x300000);
		WriteDex(0x300000);

		@@ -302,7 +314,7 @@ TEST_F(DexFilesTest, get_method_information_global_skip_zero_64) {
		dex_files_->SetArch(ARCH_ARM64);
		method_name = "fail";
		method_offset = 0x123;
		memory_->SetData32(0xc800, 0x100000);
		WriteDescriptor64(0xc800, 0x100000);
		dex_files_->GetMethodInformation(maps_.get(), info, 0x300100, &method_name, &method_offset);
		EXPECT_EQ("fail", method_name);
		EXPECT_EQ(0x123U, method_offset);