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Merge "Adjust DEX file reading to follow layout changes in ART."

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David Srbecky 2018-02-23 17:53:23 +00:00 committed by Gerrit Code Review
commit 8fbdbba9f5
2 changed files with 32 additions and 18 deletions
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8
libunwindstack/DexFiles.cpp
View file

@ -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;

42
libunwindstack/tests/DexFilesTest.cpp
View file

@ -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);