tequilaOS/platform_system_core
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Merge "Revert^2 "Use libdexfile external API in libunwindstack.""

Browse source
This commit is contained in:
Martin Stjernholm 2018-12-20 11:34:26 +00:00 committed by Gerrit Code Review
commit 8478e56580
7 changed files with 115 additions and 228 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

23
debuggerd/Android.bp
View file

@ -116,14 +116,21 @@ cc_library_static {
"libdebuggerd",
"libbacktrace",
"libunwindstack",
"libdexfile",
"libdexfile", // libunwindstack dependency
"libdexfile_external", // libunwindstack dependency
"libdexfile_support", // libunwindstack dependency
"liblzma",
"libcutils",
],
target: {
recovery: {
cflags: ["-DNO_LIBDEXFILE_SUPPORT"],
exclude_static_libs: ["libdexfile"],
exclude_static_libs: [
"libartbase",
"libdexfile",
"libdexfile_external",
"libdexfile_support",
],
},
},
@ -170,12 +177,22 @@ cc_library_static {
static_libs: [
"libbacktrace",
"libdexfile_external", // libunwindstack dependency
"libdexfile_support", // libunwindstack dependency
"libunwindstack",
"liblzma",
"libbase",
"libcutils",
"liblog",
],
target: {
recovery: {
exclude_static_libs: [
"libdexfile_external",
"libdexfile_support",
],
},
},
}
cc_test {
@ -216,6 +233,8 @@ cc_test {
static_libs: [
"libdebuggerd",
"libdexfile_external", // libunwindstack dependency
"libdexfile_support", // libunwindstack dependency
"libunwindstack",
],

14
libunwindstack/Android.bp
View file

@ -94,7 +94,10 @@ cc_library {
"DexFile.cpp",
"DexFiles.cpp",
],
exclude_shared_libs: ["libdexfile"],
exclude_shared_libs: [
"libdexfile_external",
"libdexfile_support",
],
},
recovery: {
cflags: ["-DNO_LIBDEXFILE_SUPPORT"],
@ -102,7 +105,10 @@ cc_library {
"DexFile.cpp",
"DexFiles.cpp",
],
exclude_shared_libs: ["libdexfile"],
exclude_shared_libs: [
"libdexfile_external",
"libdexfile_support",
],
},
},
@ -127,7 +133,8 @@ cc_library {
shared_libs: [
"libbase",
"libdexfile",
"libdexfile_external",
"libdexfile_support",
"liblog",
"liblzma",
],
@ -215,6 +222,7 @@ cc_test {
"liblzma",
"libunwindstack",
"libdexfile",
"libdexfile_support",
],
static_libs: [

192
libunwindstack/DexFile.cpp
View file

@ -23,13 +23,7 @@
#include <memory>
#include <android-base/unique_fd.h>
#include <dex/class_accessor-inl.h>
#include <dex/code_item_accessors-inl.h>
#include <dex/compact_dex_file.h>
#include <dex/dex_file-inl.h>
#include <dex/dex_file_loader.h>
#include <dex/standard_dex_file.h>
#include <art_api/ext_dex_file.h>
#include <unwindstack/MapInfo.h>
#include <unwindstack/Memory.h>
@ -38,169 +32,71 @@
namespace unwindstack {
DexFile* DexFile::Create(uint64_t dex_file_offset_in_memory, Memory* memory, MapInfo* info) {
std::unique_ptr<DexFile> DexFile::Create(uint64_t dex_file_offset_in_memory, Memory* memory,
MapInfo* info) {
if (!info->name.empty()) {
std::unique_ptr<DexFileFromFile> dex_file(new DexFileFromFile);
if (dex_file->Open(dex_file_offset_in_memory - info->start + info->offset, info->name)) {
return dex_file.release();
std::unique_ptr<DexFile> dex_file =
DexFileFromFile::Create(dex_file_offset_in_memory - info->start + info->offset, info->name);
if (dex_file) {
return dex_file;
}
}
std::unique_ptr<DexFileFromMemory> dex_file(new DexFileFromMemory);
if (dex_file->Open(dex_file_offset_in_memory, memory)) {
return dex_file.release();
}
return nullptr;
}
DexFileFromFile::~DexFileFromFile() {
if (size_ != 0) {
munmap(mapped_memory_, size_);
}
return DexFileFromMemory::Create(dex_file_offset_in_memory, memory, info->name);
}
bool DexFile::GetMethodInformation(uint64_t dex_offset, std::string* method_name,
uint64_t* method_offset) {
if (dex_file_ == nullptr) {
art_api::dex::MethodInfo method_info = GetMethodInfoForOffset(dex_offset);
if (method_info.offset == 0) {
return false;
}
if (!dex_file_->IsInDataSection(dex_file_->Begin() + dex_offset)) {
return false; // The DEX offset is not within the bytecode of this dex file.
}
if (dex_file_->IsCompactDexFile()) {
// The data section of compact dex files might be shared.
// Check the subrange unique to this compact dex.
const auto& cdex_header = dex_file_->AsCompactDexFile()->GetHeader();
uint32_t begin = cdex_header.data_off_ + cdex_header.OwnedDataBegin();
uint32_t end = cdex_header.data_off_ + cdex_header.OwnedDataEnd();
if (dex_offset < begin || dex_offset >= end) {
return false; // The DEX offset is not within the bytecode of this dex file.
}
}
// The method data is cached in a std::map indexed by method end offset and
// contains the start offset and the method member index.
// Only cache the method data as it is searched. Do not read the entire
// set of method data into the cache at once.
// This is done because many unwinds only find a single frame with dex file
// info, so reading the entire method data is wasteful. However, still cache
// the data so that anything doing multiple unwinds will have this data
// cached for future use.
// First look in the method cache.
auto entry = method_cache_.upper_bound(dex_offset);
if (entry != method_cache_.end() && dex_offset >= entry->second.first) {
*method_name = dex_file_->PrettyMethod(entry->second.second, false);
*method_offset = dex_offset - entry->second.first;
return true;
}
// Check the methods we haven't cached.
for (; class_def_index_ < dex_file_->NumClassDefs(); class_def_index_++) {
art::ClassAccessor accessor(*dex_file_, dex_file_->GetClassDef(class_def_index_));
for (const art::ClassAccessor::Method& method : accessor.GetMethods()) {
art::CodeItemInstructionAccessor code = method.GetInstructions();
if (!code.HasCodeItem()) {
continue;
}
uint32_t offset = reinterpret_cast<const uint8_t*>(code.Insns()) - dex_file_->Begin();
uint32_t offset_end = offset + code.InsnsSizeInBytes();
uint32_t member_index = method.GetIndex();
method_cache_[offset_end] = std::make_pair(offset, member_index);
if (offset <= dex_offset && dex_offset < offset_end) {
*method_name = dex_file_->PrettyMethod(member_index, false);
*method_offset = dex_offset - offset;
return true;
}
}
}
return false;
*method_name = method_info.name;
*method_offset = dex_offset - method_info.offset;
return true;
}
bool DexFileFromFile::Open(uint64_t dex_file_offset_in_file, const std::string& file) {
std::unique_ptr<DexFileFromFile> DexFileFromFile::Create(uint64_t dex_file_offset_in_file,
const std::string& file) {
android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(file.c_str(), O_RDONLY | O_CLOEXEC)));
if (fd == -1) {
return false;
}
struct stat buf;
if (fstat(fd, &buf) == -1) {
return false;
}
uint64_t length;
if (buf.st_size < 0 ||
__builtin_add_overflow(dex_file_offset_in_file, sizeof(art::DexFile::Header), &length) ||
static_cast<uint64_t>(buf.st_size) < length) {
return false;
return nullptr;
}
mapped_memory_ = mmap(nullptr, buf.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
if (mapped_memory_ == MAP_FAILED) {
return false;
}
size_ = buf.st_size;
uint8_t* memory = reinterpret_cast<uint8_t*>(mapped_memory_);
art::DexFile::Header* header =
reinterpret_cast<art::DexFile::Header*>(&memory[dex_file_offset_in_file]);
if (!art::StandardDexFile::IsMagicValid(header->magic_) &&
!art::CompactDexFile::IsMagicValid(header->magic_)) {
return false;
}
if (__builtin_add_overflow(dex_file_offset_in_file, header->file_size_, &length) ||
static_cast<uint64_t>(buf.st_size) < length) {
return false;
}
art::DexFileLoader loader;
std::string error_msg;
auto dex = loader.Open(&memory[dex_file_offset_in_file], header->file_size_, "", 0, nullptr,
false, false, &error_msg);
dex_file_.reset(dex.release());
return dex_file_ != nullptr;
std::unique_ptr<art_api::dex::DexFile> art_dex_file =
OpenFromFd(fd, dex_file_offset_in_file, file, &error_msg);
if (art_dex_file == nullptr) {
return nullptr;
}
return std::unique_ptr<DexFileFromFile>(new DexFileFromFile(std::move(*art_dex_file.release())));
}
bool DexFileFromMemory::Open(uint64_t dex_file_offset_in_memory, Memory* memory) {
memory_.resize(sizeof(art::DexFile::Header));
if (!memory->ReadFully(dex_file_offset_in_memory, memory_.data(), memory_.size())) {
return false;
}
std::unique_ptr<DexFileFromMemory> DexFileFromMemory::Create(uint64_t dex_file_offset_in_memory,
Memory* memory,
const std::string& name) {
std::vector<uint8_t> backing_memory;
art::DexFile::Header* header = reinterpret_cast<art::DexFile::Header*>(memory_.data());
uint32_t file_size = header->file_size_;
if (art::CompactDexFile::IsMagicValid(header->magic_)) {
// Compact dex file store data section separately so that it can be shared.
// Therefore we need to extend the read memory range to include it.
// TODO: This might be wasteful as we might read data in between as well.
// In practice, this should be fine, as such sharing only happens on disk.
uint32_t computed_file_size;
if (__builtin_add_overflow(header->data_off_, header->data_size_, &computed_file_size)) {
return false;
for (size_t size = 0;;) {
std::string error_msg;
std::unique_ptr<art_api::dex::DexFile> art_dex_file =
OpenFromMemory(backing_memory.data(), &size, name, &error_msg);
if (art_dex_file != nullptr) {
return std::unique_ptr<DexFileFromMemory>(
new DexFileFromMemory(std::move(*art_dex_file.release()), std::move(backing_memory)));
}
if (computed_file_size > file_size) {
file_size = computed_file_size;
if (!error_msg.empty()) {
return nullptr;
}
backing_memory.resize(size);
if (!memory->ReadFully(dex_file_offset_in_memory, backing_memory.data(),
backing_memory.size())) {
return nullptr;
}
} else if (!art::StandardDexFile::IsMagicValid(header->magic_)) {
return false;
}
memory_.resize(file_size);
if (!memory->ReadFully(dex_file_offset_in_memory, memory_.data(), memory_.size())) {
return false;
}
header = reinterpret_cast<art::DexFile::Header*>(memory_.data());
art::DexFileLoader loader;
std::string error_msg;
auto dex =
loader.Open(memory_.data(), header->file_size_, "", 0, nullptr, false, false, &error_msg);
dex_file_.reset(dex.release());
return dex_file_ != nullptr;
}
} // namespace unwindstack

33
libunwindstack/DexFile.h
View file

@ -25,48 +25,41 @@
#include <utility>
#include <vector>
#include <dex/dex_file-inl.h>
#include <art_api/ext_dex_file.h>
namespace unwindstack {
class DexFile {
class DexFile : protected art_api::dex::DexFile {
public:
DexFile() = default;
virtual ~DexFile() = default;
bool GetMethodInformation(uint64_t dex_offset, std::string* method_name, uint64_t* method_offset);
static DexFile* Create(uint64_t dex_file_offset_in_memory, Memory* memory, MapInfo* info);
static std::unique_ptr<DexFile> Create(uint64_t dex_file_offset_in_memory, Memory* memory,
MapInfo* info);
protected:
void Init();
std::unique_ptr<const art::DexFile> dex_file_;
std::map<uint32_t, std::pair<uint64_t, uint32_t>> method_cache_; // dex offset to method index.
uint32_t class_def_index_ = 0;
DexFile(art_api::dex::DexFile&& art_dex_file) : art_api::dex::DexFile(std::move(art_dex_file)) {}
};
class DexFileFromFile : public DexFile {
public:
DexFileFromFile() = default;
virtual ~DexFileFromFile();
bool Open(uint64_t dex_file_offset_in_file, const std::string& name);
static std::unique_ptr<DexFileFromFile> Create(uint64_t dex_file_offset_in_file,
const std::string& file);
private:
void* mapped_memory_ = nullptr;
size_t size_ = 0;
DexFileFromFile(art_api::dex::DexFile&& art_dex_file) : DexFile(std::move(art_dex_file)) {}
};
class DexFileFromMemory : public DexFile {
public:
DexFileFromMemory() = default;
virtual ~DexFileFromMemory() = default;
bool Open(uint64_t dex_file_offset_in_memory, Memory* memory);
static std::unique_ptr<DexFileFromMemory> Create(uint64_t dex_file_offset_in_memory,
Memory* memory, const std::string& name);
private:
DexFileFromMemory(art_api::dex::DexFile&& art_dex_file, std::vector<uint8_t>&& memory)
: DexFile(std::move(art_dex_file)), memory_(std::move(memory)) {}
std::vector<uint8_t> memory_;
};

13
libunwindstack/DexFiles.cpp
View file

@ -48,11 +48,7 @@ DexFiles::DexFiles(std::shared_ptr<Memory>& memory) : Global(memory) {}
DexFiles::DexFiles(std::shared_ptr<Memory>& memory, std::vector<std::string>& search_libs)
: Global(memory, search_libs) {}
DexFiles::~DexFiles() {
for (auto& entry : files_) {
delete entry.second;
}
}
DexFiles::~DexFiles() {}
void DexFiles::ProcessArch() {
switch (arch()) {
@ -137,10 +133,11 @@ DexFile* DexFiles::GetDexFile(uint64_t dex_file_offset, MapInfo* info) {
DexFile* dex_file;
auto entry = files_.find(dex_file_offset);
if (entry == files_.end()) {
dex_file = DexFile::Create(dex_file_offset, memory_.get(), info);
files_[dex_file_offset] = dex_file;
std::unique_ptr<DexFile> new_dex_file = DexFile::Create(dex_file_offset, memory_.get(), info);
dex_file = new_dex_file.get();
files_[dex_file_offset] = std::move(new_dex_file);
} else {
dex_file = entry->second;
dex_file = entry->second.get();
}
return dex_file;
}

2
libunwindstack/include/unwindstack/DexFiles.h
View file

@ -66,7 +66,7 @@ class DexFiles : public Global {
std::mutex lock_;
bool initialized_ = false;
std::unordered_map<uint64_t, DexFile*> files_;
std::unordered_map<uint64_t, std::unique_ptr<DexFile>> files_;
uint64_t entry_addr_ = 0;
uint64_t (DexFiles::*read_entry_ptr_func_)(uint64_t) = nullptr;

66
libunwindstack/tests/DexFileTest.cpp
View file

@ -21,44 +21,37 @@
#include <unordered_map>
#include <android-base/file.h>
#include <dex/dex_file.h>
#include <gtest/gtest.h>
#include <unwindstack/MapInfo.h>
#include <unwindstack/Memory.h>
#include <dex/code_item_accessors-inl.h>
#include <dex/standard_dex_file.h>
#include <gtest/gtest.h>
#include "DexFile.h"
#include "DexFileData.h"
#include "MemoryFake.h"
namespace unwindstack {
TEST(DexFileTest, from_file_open_non_exist) {
DexFileFromFile dex_file;
ASSERT_FALSE(dex_file.Open(0, "/file/does/not/exist"));
EXPECT_TRUE(DexFileFromFile::Create(0, "/file/does/not/exist") == nullptr);
}
TEST(DexFileTest, from_file_open_too_small) {
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
ASSERT_EQ(sizeof(art::DexFile::Header) - 2,
ASSERT_EQ(sizeof(art::DexFile::Header) - 1,
static_cast<size_t>(
TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(art::DexFile::Header)) - 2)));
TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(art::DexFile::Header) - 1))));
// Header too small.
DexFileFromFile dex_file;
ASSERT_FALSE(dex_file.Open(0, tf.path));
EXPECT_TRUE(DexFileFromFile::Create(0, tf.path) == nullptr);
// Header correct, file too small.
ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_SET));
ASSERT_EQ(sizeof(art::DexFile::Header), static_cast<size_t>(TEMP_FAILURE_RETRY(write(
tf.fd, kDexData, sizeof(art::DexFile::Header)))));
ASSERT_FALSE(dex_file.Open(0, tf.path));
EXPECT_TRUE(DexFileFromFile::Create(0, tf.path) == nullptr);
}
TEST(DexFileTest, from_file_open) {
@ -68,8 +61,7 @@ TEST(DexFileTest, from_file_open) {
ASSERT_EQ(sizeof(kDexData),
static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData)))));
DexFileFromFile dex_file;
ASSERT_TRUE(dex_file.Open(0, tf.path));
EXPECT_TRUE(DexFileFromFile::Create(0, tf.path) != nullptr);
}
TEST(DexFileTest, from_file_open_non_zero_offset) {
@ -80,35 +72,31 @@ TEST(DexFileTest, from_file_open_non_zero_offset) {
ASSERT_EQ(sizeof(kDexData),
static_cast<size_t>(TEMP_FAILURE_RETRY(write(tf.fd, kDexData, sizeof(kDexData)))));
DexFileFromFile dex_file;
ASSERT_TRUE(dex_file.Open(0x100, tf.path));
EXPECT_TRUE(DexFileFromFile::Create(0x100, tf.path) != nullptr);
}
TEST(DexFileTest, from_memory_fail_too_small_for_header) {
MemoryFake memory;
memory.SetMemory(0x1000, kDexData, sizeof(art::DexFile::Header) - 1);
DexFileFromMemory dex_file;
ASSERT_FALSE(dex_file.Open(0x1000, &memory));
EXPECT_TRUE(DexFileFromMemory::Create(0x1000, &memory, "") == nullptr);
}
TEST(DexFileTest, from_memory_fail_too_small_for_data) {
MemoryFake memory;
memory.SetMemory(0x1000, kDexData, sizeof(kDexData) - 2);
DexFileFromMemory dex_file;
ASSERT_FALSE(dex_file.Open(0x1000, &memory));
EXPECT_TRUE(DexFileFromMemory::Create(0x1000, &memory, "") == nullptr);
}
TEST(DexFileTest, from_memory_open) {
MemoryFake memory;
memory.SetMemory(0x1000, kDexData, sizeof(kDexData));
DexFileFromMemory dex_file;
ASSERT_TRUE(dex_file.Open(0x1000, &memory));
EXPECT_TRUE(DexFileFromMemory::Create(0x1000, &memory, "") != nullptr);
}
TEST(DexFileTest, create_using_file) {
@ -121,8 +109,7 @@ TEST(DexFileTest, create_using_file) {
MemoryFake memory;
MapInfo info(nullptr, 0, 0x10000, 0, 0x5, tf.path);
std::unique_ptr<DexFile> dex_file(DexFile::Create(0x500, &memory, &info));
ASSERT_TRUE(dex_file != nullptr);
EXPECT_TRUE(DexFile::Create(0x500, &memory, &info) != nullptr);
}
TEST(DexFileTest, create_using_file_non_zero_start) {
@ -135,8 +122,7 @@ TEST(DexFileTest, create_using_file_non_zero_start) {
MemoryFake memory;
MapInfo info(nullptr, 0x100, 0x10000, 0, 0x5, tf.path);
std::unique_ptr<DexFile> dex_file(DexFile::Create(0x600, &memory, &info));
ASSERT_TRUE(dex_file != nullptr);
EXPECT_TRUE(DexFile::Create(0x600, &memory, &info) != nullptr);
}
TEST(DexFileTest, create_using_file_non_zero_offset) {
@ -149,24 +135,21 @@ TEST(DexFileTest, create_using_file_non_zero_offset) {
MemoryFake memory;
MapInfo info(nullptr, 0x100, 0x10000, 0x200, 0x5, tf.path);
std::unique_ptr<DexFile> dex_file(DexFile::Create(0x400, &memory, &info));
ASSERT_TRUE(dex_file != nullptr);
EXPECT_TRUE(DexFile::Create(0x400, &memory, &info) != nullptr);
}
TEST(DexFileTest, create_using_memory_empty_file) {
MemoryFake memory;
memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
MapInfo info(nullptr, 0x100, 0x10000, 0x200, 0x5, "");
std::unique_ptr<DexFile> dex_file(DexFile::Create(0x4000, &memory, &info));
ASSERT_TRUE(dex_file != nullptr);
EXPECT_TRUE(DexFile::Create(0x4000, &memory, &info) != nullptr);
}
TEST(DexFileTest, create_using_memory_file_does_not_exist) {
MemoryFake memory;
memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
MapInfo info(nullptr, 0x100, 0x10000, 0x200, 0x5, "/does/not/exist");
std::unique_ptr<DexFile> dex_file(DexFile::Create(0x4000, &memory, &info));
ASSERT_TRUE(dex_file != nullptr);
EXPECT_TRUE(DexFile::Create(0x4000, &memory, &info) != nullptr);
}
TEST(DexFileTest, create_using_memory_file_is_malformed) {
@ -179,22 +162,13 @@ TEST(DexFileTest, create_using_memory_file_is_malformed) {
MemoryFake memory;
memory.SetMemory(0x4000, kDexData, sizeof(kDexData));
MapInfo info(nullptr, 0x4000, 0x10000, 0x200, 0x5, "/does/not/exist");
std::unique_ptr<DexFile> dex_file(DexFile::Create(0x4000, &memory, &info));
std::unique_ptr<DexFile> dex_file = DexFile::Create(0x4000, &memory, &info);
ASSERT_TRUE(dex_file != nullptr);
// Check it came from memory by clearing memory and verifying it fails.
memory.Clear();
dex_file.reset(DexFile::Create(0x4000, &memory, &info));
ASSERT_TRUE(dex_file == nullptr);
}
TEST(DexFileTest, get_method_not_opened) {
std::string method("something");
uint64_t method_offset = 100;
DexFile dex_file;
dex_file.GetMethodInformation(0x100, &method, &method_offset);
EXPECT_EQ("something", method);
EXPECT_EQ(100U, method_offset);
dex_file = DexFile::Create(0x4000, &memory, &info);
EXPECT_TRUE(dex_file == nullptr);
}
TEST(DexFileTest, get_method) {