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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "oat_writer.h"
#include <unistd.h>
#include <zlib.h>
#include "arch/arm64/instruction_set_features_arm64.h"
#include "art_method-inl.h"
#include "base/allocator.h"
#include "base/bit_vector.h"
#include "base/file_magic.h"
#include "base/stl_util.h"
#include "base/unix_file/fd_file.h"
#include "class_linker.h"
#include "compiled_class.h"
#include "compiled_method.h"
#include "debug/method_debug_info.h"
#include "dex/verification_results.h"
#include "dex_file-inl.h"
#include "driver/compiler_driver.h"
#include "driver/compiler_options.h"
#include "gc/space/image_space.h"
#include "gc/space/space.h"
#include "handle_scope-inl.h"
#include "image_writer.h"
#include "linker/output_stream.h"
#include "linker/relative_patcher.h"
#include "mirror/array.h"
#include "mirror/class_loader.h"
#include "mirror/dex_cache-inl.h"
#include "mirror/object-inl.h"
#include "oat_quick_method_header.h"
#include "os.h"
#include "safe_map.h"
#include "scoped_thread_state_change.h"
#include "type_lookup_table.h"
#include "utils/dex_cache_arrays_layout-inl.h"
#include "verifier/method_verifier.h"
#include "zip_archive.h"
namespace art {
namespace { // anonymous namespace
typedef DexFile::Header __attribute__((aligned(1))) UnalignedDexFileHeader;
const UnalignedDexFileHeader* AsUnalignedDexFileHeader(const uint8_t* raw_data) {
return reinterpret_cast<const UnalignedDexFileHeader*>(raw_data);
}
} // anonymous namespace
// Defines the location of the raw dex file to write.
class OatWriter::DexFileSource {
public:
explicit DexFileSource(ZipEntry* zip_entry)
: type_(kZipEntry), source_(zip_entry) {
DCHECK(source_ != nullptr);
}
explicit DexFileSource(File* raw_file)
: type_(kRawFile), source_(raw_file) {
DCHECK(source_ != nullptr);
}
explicit DexFileSource(const uint8_t* dex_file)
: type_(kRawData), source_(dex_file) {
DCHECK(source_ != nullptr);
}
bool IsZipEntry() const { return type_ == kZipEntry; }
bool IsRawFile() const { return type_ == kRawFile; }
bool IsRawData() const { return type_ == kRawData; }
ZipEntry* GetZipEntry() const {
DCHECK(IsZipEntry());
DCHECK(source_ != nullptr);
return static_cast<ZipEntry*>(const_cast<void*>(source_));
}
File* GetRawFile() const {
DCHECK(IsRawFile());
DCHECK(source_ != nullptr);
return static_cast<File*>(const_cast<void*>(source_));
}
const uint8_t* GetRawData() const {
DCHECK(IsRawData());
DCHECK(source_ != nullptr);
return static_cast<const uint8_t*>(source_);
}
void Clear() {
type_ = kNone;
source_ = nullptr;
}
private:
enum Type {
kNone,
kZipEntry,
kRawFile,
kRawData,
};
Type type_;
const void* source_;
};
class OatWriter::OatClass {
public:
OatClass(size_t offset,
const dchecked_vector<CompiledMethod*>& compiled_methods,
uint32_t num_non_null_compiled_methods,
mirror::Class::Status status);
OatClass(OatClass&& src) = default;
size_t GetOatMethodOffsetsOffsetFromOatHeader(size_t class_def_method_index_) const;
size_t GetOatMethodOffsetsOffsetFromOatClass(size_t class_def_method_index_) const;
size_t SizeOf() const;
bool Write(OatWriter* oat_writer, OutputStream* out, const size_t file_offset) const;
CompiledMethod* GetCompiledMethod(size_t class_def_method_index) const {
return compiled_methods_[class_def_method_index];
}
// Offset of start of OatClass from beginning of OatHeader. It is
// used to validate file position when writing.
size_t offset_;
// CompiledMethods for each class_def_method_index, or null if no method is available.
dchecked_vector<CompiledMethod*> compiled_methods_;
// Offset from OatClass::offset_ to the OatMethodOffsets for the
// class_def_method_index. If 0, it means the corresponding
// CompiledMethod entry in OatClass::compiled_methods_ should be
// null and that the OatClass::type_ should be kOatClassBitmap.
dchecked_vector<uint32_t> oat_method_offsets_offsets_from_oat_class_;
// Data to write.
static_assert(mirror::Class::Status::kStatusMax < (1 << 16), "class status won't fit in 16bits");
int16_t status_;
static_assert(OatClassType::kOatClassMax < (1 << 16), "oat_class type won't fit in 16bits");
uint16_t type_;
uint32_t method_bitmap_size_;
// bit vector indexed by ClassDef method index. When
// OatClassType::type_ is kOatClassBitmap, a set bit indicates the
// method has an OatMethodOffsets in methods_offsets_, otherwise
// the entry was ommited to save space. If OatClassType::type_ is
// not is kOatClassBitmap, the bitmap will be null.
std::unique_ptr<BitVector> method_bitmap_;
// OatMethodOffsets and OatMethodHeaders for each CompiledMethod
// present in the OatClass. Note that some may be missing if
// OatClass::compiled_methods_ contains null values (and
// oat_method_offsets_offsets_from_oat_class_ should contain 0
// values in this case).
dchecked_vector<OatMethodOffsets> method_offsets_;
dchecked_vector<OatQuickMethodHeader> method_headers_;
private:
size_t GetMethodOffsetsRawSize() const {
return method_offsets_.size() * sizeof(method_offsets_[0]);
}
DISALLOW_COPY_AND_ASSIGN(OatClass);
};
class OatWriter::OatDexFile {
public:
OatDexFile(const char* dex_file_location,
DexFileSource source,
CreateTypeLookupTable create_type_lookup_table);
OatDexFile(OatDexFile&& src) = default;
const char* GetLocation() const {
return dex_file_location_data_;
}
void ReserveTypeLookupTable(OatWriter* oat_writer);
void ReserveClassOffsets(OatWriter* oat_writer);
size_t SizeOf() const;
bool Write(OatWriter* oat_writer, OutputStream* out) const;
bool WriteClassOffsets(OatWriter* oat_writer, OutputStream* out);
// The source of the dex file.
DexFileSource source_;
// Whether to create the type lookup table.
CreateTypeLookupTable create_type_lookup_table_;
// Dex file size. Initialized when writing the dex file.
size_t dex_file_size_;
// Offset of start of OatDexFile from beginning of OatHeader. It is
// used to validate file position when writing.
size_t offset_;
// Data to write.
uint32_t dex_file_location_size_;
const char* dex_file_location_data_;
uint32_t dex_file_location_checksum_;
uint32_t dex_file_offset_;
uint32_t class_offsets_offset_;
uint32_t lookup_table_offset_;
// Data to write to a separate section.
dchecked_vector<uint32_t> class_offsets_;
private:
size_t GetClassOffsetsRawSize() const {
return class_offsets_.size() * sizeof(class_offsets_[0]);
}
DISALLOW_COPY_AND_ASSIGN(OatDexFile);
};
#define DCHECK_OFFSET() \
DCHECK_EQ(static_cast<off_t>(file_offset + relative_offset), out->Seek(0, kSeekCurrent)) \
<< "file_offset=" << file_offset << " relative_offset=" << relative_offset
#define DCHECK_OFFSET_() \
DCHECK_EQ(static_cast<off_t>(file_offset + offset_), out->Seek(0, kSeekCurrent)) \
<< "file_offset=" << file_offset << " offset_=" << offset_
OatWriter::OatWriter(bool compiling_boot_image, TimingLogger* timings)
: write_state_(WriteState::kAddingDexFileSources),
timings_(timings),
raw_dex_files_(),
zip_archives_(),
zipped_dex_files_(),
zipped_dex_file_locations_(),
compiler_driver_(nullptr),
image_writer_(nullptr),
compiling_boot_image_(compiling_boot_image),
dex_files_(nullptr),
size_(0u),
bss_size_(0u),
oat_data_offset_(0u),
oat_header_(nullptr),
size_dex_file_alignment_(0),
size_executable_offset_alignment_(0),
size_oat_header_(0),
size_oat_header_key_value_store_(0),
size_dex_file_(0),
size_interpreter_to_interpreter_bridge_(0),
size_interpreter_to_compiled_code_bridge_(0),
size_jni_dlsym_lookup_(0),
size_quick_generic_jni_trampoline_(0),
size_quick_imt_conflict_trampoline_(0),
size_quick_resolution_trampoline_(0),
size_quick_to_interpreter_bridge_(0),
size_trampoline_alignment_(0),
size_method_header_(0),
size_code_(0),
size_code_alignment_(0),
size_relative_call_thunks_(0),
size_misc_thunks_(0),
size_mapping_table_(0),
size_vmap_table_(0),
size_gc_map_(0),
size_oat_dex_file_location_size_(0),
size_oat_dex_file_location_data_(0),
size_oat_dex_file_location_checksum_(0),
size_oat_dex_file_offset_(0),
size_oat_dex_file_class_offsets_offset_(0),
size_oat_dex_file_lookup_table_offset_(0),
size_oat_lookup_table_alignment_(0),
size_oat_lookup_table_(0),
size_oat_class_offsets_alignment_(0),
size_oat_class_offsets_(0),
size_oat_class_type_(0),
size_oat_class_status_(0),
size_oat_class_method_bitmaps_(0),
size_oat_class_method_offsets_(0),
method_offset_map_() {
}
bool OatWriter::AddDexFileSource(const char* filename,
const char* location,
CreateTypeLookupTable create_type_lookup_table) {
DCHECK(write_state_ == WriteState::kAddingDexFileSources);
uint32_t magic;
std::string error_msg;
ScopedFd fd(OpenAndReadMagic(filename, &magic, &error_msg));
if (fd.get() == -1) {
PLOG(ERROR) << "Failed to read magic number from dex file: '" << filename << "'";
return false;
} else if (IsDexMagic(magic)) {
// The file is open for reading, not writing, so it's OK to let the File destructor
// close it without checking for explicit Close(), so pass checkUsage = false.
raw_dex_files_.emplace_back(new File(fd.release(), location, /* checkUsage */ false));
oat_dex_files_.emplace_back(location,
DexFileSource(raw_dex_files_.back().get()),
create_type_lookup_table);
} else if (IsZipMagic(magic)) {
if (!AddZippedDexFilesSource(std::move(fd), location, create_type_lookup_table)) {
return false;
}
} else {
LOG(ERROR) << "Expected valid zip or dex file: '" << filename << "'";
return false;
}
return true;
}
// Add dex file source(s) from a zip file specified by a file handle.
bool OatWriter::AddZippedDexFilesSource(ScopedFd&& zip_fd,
const char* location,
CreateTypeLookupTable create_type_lookup_table) {
DCHECK(write_state_ == WriteState::kAddingDexFileSources);
std::string error_msg;
zip_archives_.emplace_back(ZipArchive::OpenFromFd(zip_fd.release(), location, &error_msg));
ZipArchive* zip_archive = zip_archives_.back().get();
if (zip_archive == nullptr) {
LOG(ERROR) << "Failed to open zip from file descriptor for '" << location << "': "
<< error_msg;
return false;
}
for (size_t i = 0; ; ++i) {
std::string entry_name = DexFile::GetMultiDexClassesDexName(i);
std::unique_ptr<ZipEntry> entry(zip_archive->Find(entry_name.c_str(), &error_msg));
if (entry == nullptr) {
break;
}
zipped_dex_files_.push_back(std::move(entry));
zipped_dex_file_locations_.push_back(DexFile::GetMultiDexLocation(i, location));
const char* full_location = zipped_dex_file_locations_.back().c_str();
oat_dex_files_.emplace_back(full_location,
DexFileSource(zipped_dex_files_.back().get()),
create_type_lookup_table);
}
if (zipped_dex_file_locations_.empty()) {
LOG(ERROR) << "No dex files in zip file '" << location << "': " << error_msg;
return false;
}
return true;
}
// Add dex file source from raw memory.
bool OatWriter::AddRawDexFileSource(const ArrayRef<const uint8_t>& data,
const char* location,
uint32_t location_checksum,
CreateTypeLookupTable create_type_lookup_table) {
DCHECK(write_state_ == WriteState::kAddingDexFileSources);
if (data.size() < sizeof(DexFile::Header)) {
LOG(ERROR) << "Provided data is shorter than dex file header. size: "
<< data.size() << " File: " << location;
return false;
}
if (!ValidateDexFileHeader(data.data(), location)) {
return false;
}
const UnalignedDexFileHeader* header = AsUnalignedDexFileHeader(data.data());
if (data.size() < header->file_size_) {
LOG(ERROR) << "Truncated dex file data. Data size: " << data.size()
<< " file size from header: " << header->file_size_ << " File: " << location;
return false;
}
oat_dex_files_.emplace_back(location, DexFileSource(data.data()), create_type_lookup_table);
oat_dex_files_.back().dex_file_location_checksum_ = location_checksum;
return true;
}
dchecked_vector<const char*> OatWriter::GetSourceLocations() const {
dchecked_vector<const char*> locations;
locations.reserve(oat_dex_files_.size());
for (const OatDexFile& oat_dex_file : oat_dex_files_) {
locations.push_back(oat_dex_file.GetLocation());
}
return locations;
}
bool OatWriter::WriteAndOpenDexFiles(
OutputStream* rodata,
File* file,
InstructionSet instruction_set,
const InstructionSetFeatures* instruction_set_features,
SafeMap<std::string, std::string>* key_value_store,
bool verify,
/*out*/ std::unique_ptr<MemMap>* opened_dex_files_map,
/*out*/ std::vector<std::unique_ptr<const DexFile>>* opened_dex_files) {
CHECK(write_state_ == WriteState::kAddingDexFileSources);
size_t offset = InitOatHeader(instruction_set,
instruction_set_features,
dchecked_integral_cast<uint32_t>(oat_dex_files_.size()),
key_value_store);
offset = InitOatDexFiles(offset);
size_ = offset;
std::unique_ptr<MemMap> dex_files_map;
std::vector<std::unique_ptr<const DexFile>> dex_files;
if (!WriteDexFiles(rodata, file)) {
return false;
}
// Reserve space for type lookup tables and update type_lookup_table_offset_.
for (OatDexFile& oat_dex_file : oat_dex_files_) {
oat_dex_file.ReserveTypeLookupTable(this);
}
size_t size_after_type_lookup_tables = size_;
// Reserve space for class offsets and update class_offsets_offset_.
for (OatDexFile& oat_dex_file : oat_dex_files_) {
oat_dex_file.ReserveClassOffsets(this);
}
if (!WriteOatDexFiles(rodata) ||
!ExtendForTypeLookupTables(rodata, file, size_after_type_lookup_tables) ||
!OpenDexFiles(file, verify, &dex_files_map, &dex_files) ||
!WriteTypeLookupTables(dex_files_map.get(), dex_files)) {
return false;
}
*opened_dex_files_map = std::move(dex_files_map);
*opened_dex_files = std::move(dex_files);
write_state_ = WriteState::kPrepareLayout;
return true;
}
void OatWriter::PrepareLayout(const CompilerDriver* compiler,
ImageWriter* image_writer,
const std::vector<const DexFile*>& dex_files) {
CHECK(write_state_ == WriteState::kPrepareLayout);
dex_files_ = &dex_files;
compiler_driver_ = compiler;
image_writer_ = image_writer;
if (compiling_boot_image_) {
CHECK(image_writer_ != nullptr);
}
InstructionSet instruction_set = compiler_driver_->GetInstructionSet();
CHECK_EQ(instruction_set, oat_header_->GetInstructionSet());
const InstructionSetFeatures* features = compiler_driver_->GetInstructionSetFeatures();
relative_patcher_ = linker::RelativePatcher::Create(instruction_set, features,
&method_offset_map_);
uint32_t offset = size_;
{
TimingLogger::ScopedTiming split("InitOatClasses", timings_);
offset = InitOatClasses(offset);
}
{
TimingLogger::ScopedTiming split("InitOatMaps", timings_);
offset = InitOatMaps(offset);
}
{
TimingLogger::ScopedTiming split("InitOatCode", timings_);
offset = InitOatCode(offset);
}
{
TimingLogger::ScopedTiming split("InitOatCodeDexFiles", timings_);
offset = InitOatCodeDexFiles(offset);
}
size_ = offset;
if (!HasBootImage()) {
// Allocate space for app dex cache arrays in the .bss section.
size_t bss_start = RoundUp(size_, kPageSize);
size_t pointer_size = GetInstructionSetPointerSize(instruction_set);
bss_size_ = 0u;
for (const DexFile* dex_file : *dex_files_) {
dex_cache_arrays_offsets_.Put(dex_file, bss_start + bss_size_);
DexCacheArraysLayout layout(pointer_size, dex_file);
bss_size_ += layout.Size();
}
}
CHECK_EQ(dex_files_->size(), oat_dex_files_.size());
if (compiling_boot_image_) {
CHECK_EQ(image_writer_ != nullptr,
oat_header_->GetStoreValueByKey(OatHeader::kImageLocationKey) == nullptr);
}
write_state_ = WriteState::kWriteRoData;
}
OatWriter::~OatWriter() {
}
struct OatWriter::GcMapDataAccess {
static ArrayRef<const uint8_t> GetData(const CompiledMethod* compiled_method) ALWAYS_INLINE {
return compiled_method->GetGcMap();
}
static uint32_t GetOffset(OatClass* oat_class, size_t method_offsets_index) ALWAYS_INLINE {
uint32_t offset = oat_class->method_headers_[method_offsets_index].gc_map_offset_;
return offset == 0u ? 0u :
(oat_class->method_offsets_[method_offsets_index].code_offset_ & ~1) - offset;
}
static void SetOffset(OatClass* oat_class, size_t method_offsets_index, uint32_t offset)
ALWAYS_INLINE {
oat_class->method_headers_[method_offsets_index].gc_map_offset_ =
(oat_class->method_offsets_[method_offsets_index].code_offset_ & ~1) - offset;
}
static const char* Name() {
return "GC map";
}
};
struct OatWriter::MappingTableDataAccess {
static ArrayRef<const uint8_t> GetData(const CompiledMethod* compiled_method) ALWAYS_INLINE {
return compiled_method->GetMappingTable();
}
static uint32_t GetOffset(OatClass* oat_class, size_t method_offsets_index) ALWAYS_INLINE {
uint32_t offset = oat_class->method_headers_[method_offsets_index].mapping_table_offset_;
return offset == 0u ? 0u :
(oat_class->method_offsets_[method_offsets_index].code_offset_ & ~1) - offset;
}
static void SetOffset(OatClass* oat_class, size_t method_offsets_index, uint32_t offset)
ALWAYS_INLINE {
oat_class->method_headers_[method_offsets_index].mapping_table_offset_ =
(oat_class->method_offsets_[method_offsets_index].code_offset_ & ~1) - offset;
}
static const char* Name() {
return "mapping table";
}
};
struct OatWriter::VmapTableDataAccess {
static ArrayRef<const uint8_t> GetData(const CompiledMethod* compiled_method) ALWAYS_INLINE {
return compiled_method->GetVmapTable();
}
static uint32_t GetOffset(OatClass* oat_class, size_t method_offsets_index) ALWAYS_INLINE {
uint32_t offset = oat_class->method_headers_[method_offsets_index].vmap_table_offset_;
return offset == 0u ? 0u :
(oat_class->method_offsets_[method_offsets_index].code_offset_ & ~1) - offset;
}
static void SetOffset(OatClass* oat_class, size_t method_offsets_index, uint32_t offset)
ALWAYS_INLINE {
oat_class->method_headers_[method_offsets_index].vmap_table_offset_ =
(oat_class->method_offsets_[method_offsets_index].code_offset_ & ~1) - offset;
}
static const char* Name() {
return "vmap table";
}
};
class OatWriter::DexMethodVisitor {
public:
DexMethodVisitor(OatWriter* writer, size_t offset)
: writer_(writer),
offset_(offset),
dex_file_(nullptr),
class_def_index_(DexFile::kDexNoIndex) {
}
virtual bool StartClass(const DexFile* dex_file, size_t class_def_index) {
DCHECK(dex_file_ == nullptr);
DCHECK_EQ(class_def_index_, DexFile::kDexNoIndex);
dex_file_ = dex_file;
class_def_index_ = class_def_index;
return true;
}
virtual bool VisitMethod(size_t class_def_method_index, const ClassDataItemIterator& it) = 0;
virtual bool EndClass() {
if (kIsDebugBuild) {
dex_file_ = nullptr;
class_def_index_ = DexFile::kDexNoIndex;
}
return true;
}
size_t GetOffset() const {
return offset_;
}
protected:
virtual ~DexMethodVisitor() { }
OatWriter* const writer_;
// The offset is usually advanced for each visited method by the derived class.
size_t offset_;
// The dex file and class def index are set in StartClass().
const DexFile* dex_file_;
size_t class_def_index_;
};
class OatWriter::OatDexMethodVisitor : public DexMethodVisitor {
public:
OatDexMethodVisitor(OatWriter* writer, size_t offset)
: DexMethodVisitor(writer, offset),
oat_class_index_(0u),
method_offsets_index_(0u) {
}
bool StartClass(const DexFile* dex_file, size_t class_def_index) {
DexMethodVisitor::StartClass(dex_file, class_def_index);
DCHECK_LT(oat_class_index_, writer_->oat_classes_.size());
method_offsets_index_ = 0u;
return true;
}
bool EndClass() {
++oat_class_index_;
return DexMethodVisitor::EndClass();
}
protected:
size_t oat_class_index_;
size_t method_offsets_index_;
};
class OatWriter::InitOatClassesMethodVisitor : public DexMethodVisitor {
public:
InitOatClassesMethodVisitor(OatWriter* writer, size_t offset)
: DexMethodVisitor(writer, offset),
compiled_methods_(),
num_non_null_compiled_methods_(0u) {
size_t num_classes = 0u;
for (const OatDexFile& oat_dex_file : writer_->oat_dex_files_) {
num_classes += oat_dex_file.class_offsets_.size();
}
writer_->oat_classes_.reserve(num_classes);
compiled_methods_.reserve(256u);
}
bool StartClass(const DexFile* dex_file, size_t class_def_index) {
DexMethodVisitor::StartClass(dex_file, class_def_index);
compiled_methods_.clear();
num_non_null_compiled_methods_ = 0u;
return true;
}
bool VisitMethod(size_t class_def_method_index ATTRIBUTE_UNUSED,
const ClassDataItemIterator& it) {
// Fill in the compiled_methods_ array for methods that have a
// CompiledMethod. We track the number of non-null entries in
// num_non_null_compiled_methods_ since we only want to allocate
// OatMethodOffsets for the compiled methods.
uint32_t method_idx = it.GetMemberIndex();
CompiledMethod* compiled_method =
writer_->compiler_driver_->GetCompiledMethod(MethodReference(dex_file_, method_idx));
compiled_methods_.push_back(compiled_method);
if (compiled_method != nullptr) {
++num_non_null_compiled_methods_;
}
return true;
}
bool EndClass() {
ClassReference class_ref(dex_file_, class_def_index_);
CompiledClass* compiled_class = writer_->compiler_driver_->GetCompiledClass(class_ref);
mirror::Class::Status status;
if (compiled_class != nullptr) {
status = compiled_class->GetStatus();
} else if (writer_->compiler_driver_->GetVerificationResults()->IsClassRejected(class_ref)) {
status = mirror::Class::kStatusError;
} else {
status = mirror::Class::kStatusNotReady;
}
writer_->oat_classes_.emplace_back(offset_,
compiled_methods_,
num_non_null_compiled_methods_,
status);
offset_ += writer_->oat_classes_.back().SizeOf();
return DexMethodVisitor::EndClass();
}
private:
dchecked_vector<CompiledMethod*> compiled_methods_;
size_t num_non_null_compiled_methods_;
};
class OatWriter::InitCodeMethodVisitor : public OatDexMethodVisitor {
public:
InitCodeMethodVisitor(OatWriter* writer, size_t offset)
: OatDexMethodVisitor(writer, offset),
debuggable_(writer->GetCompilerDriver()->GetCompilerOptions().GetDebuggable()) {
writer_->absolute_patch_locations_.reserve(
writer_->compiler_driver_->GetNonRelativeLinkerPatchCount());
}
bool EndClass() {
OatDexMethodVisitor::EndClass();
if (oat_class_index_ == writer_->oat_classes_.size()) {
offset_ = writer_->relative_patcher_->ReserveSpaceEnd(offset_);
}
return true;
}
bool VisitMethod(size_t class_def_method_index, const ClassDataItemIterator& it)
SHARED_REQUIRES(Locks::mutator_lock_) {
OatClass* oat_class = &writer_->oat_classes_[oat_class_index_];
CompiledMethod* compiled_method = oat_class->GetCompiledMethod(class_def_method_index);
if (compiled_method != nullptr) {
// Derived from CompiledMethod.
uint32_t quick_code_offset = 0;
ArrayRef<const uint8_t> quick_code = compiled_method->GetQuickCode();
uint32_t code_size = quick_code.size() * sizeof(uint8_t);
uint32_t thumb_offset = compiled_method->CodeDelta();
// Deduplicate code arrays if we are not producing debuggable code.
bool deduped = false;
MethodReference method_ref(dex_file_, it.GetMemberIndex());
auto method_lb = writer_->method_offset_map_.map.lower_bound(method_ref);
if (debuggable_) {
if (method_lb != writer_->method_offset_map_.map.end() &&
!writer_->method_offset_map_.map.key_comp()(method_ref, method_lb->first)) {
// Duplicate methods, we want the same code for both of them so that the oat writer puts
// the same code in both ArtMethods so that we do not get different oat code at runtime.
quick_code_offset = method_lb->second;
deduped = true;
} else {
quick_code_offset = NewQuickCodeOffset(compiled_method, it, thumb_offset);
}
} else {
auto lb = dedupe_map_.lower_bound(compiled_method);
if (lb != dedupe_map_.end() && !dedupe_map_.key_comp()(compiled_method, lb->first)) {
quick_code_offset = lb->second;
deduped = true;
} else {
quick_code_offset = NewQuickCodeOffset(compiled_method, it, thumb_offset);
dedupe_map_.PutBefore(lb, compiled_method, quick_code_offset);
}
}
if (code_size != 0) {
if (method_lb != writer_->method_offset_map_.map.end() &&
!writer_->method_offset_map_.map.key_comp()(method_ref, method_lb->first)) {
// TODO: Should this be a hard failure?
LOG(WARNING) << "Multiple definitions of "
<< PrettyMethod(method_ref.dex_method_index, *method_ref.dex_file)
<< " offsets " << method_lb->second << " " << quick_code_offset;
} else {
writer_->method_offset_map_.map.PutBefore(method_lb, method_ref, quick_code_offset);
}
}
// Update quick method header.
DCHECK_LT(method_offsets_index_, oat_class->method_headers_.size());
OatQuickMethodHeader* method_header = &oat_class->method_headers_[method_offsets_index_];
uint32_t mapping_table_offset = method_header->mapping_table_offset_;
uint32_t vmap_table_offset = method_header->vmap_table_offset_;
// If we don't have quick code, then we must have a vmap, as that is how the dex2dex
// compiler records its transformations.
DCHECK(!quick_code.empty() || vmap_table_offset != 0);
uint32_t gc_map_offset = method_header->gc_map_offset_;
// The code offset was 0 when the mapping/vmap table offset was set, so it's set
// to 0-offset and we need to adjust it by code_offset.
uint32_t code_offset = quick_code_offset - thumb_offset;
if (mapping_table_offset != 0u && code_offset != 0u) {
mapping_table_offset += code_offset;
DCHECK_LT(mapping_table_offset, code_offset) << "Overflow in oat offsets";
}
if (vmap_table_offset != 0u && code_offset != 0u) {
vmap_table_offset += code_offset;
DCHECK_LT(vmap_table_offset, code_offset) << "Overflow in oat offsets";
}
if (gc_map_offset != 0u && code_offset != 0u) {
gc_map_offset += code_offset;
DCHECK_LT(gc_map_offset, code_offset) << "Overflow in oat offsets";
}
uint32_t frame_size_in_bytes = compiled_method->GetFrameSizeInBytes();
uint32_t core_spill_mask = compiled_method->GetCoreSpillMask();
uint32_t fp_spill_mask = compiled_method->GetFpSpillMask();
*method_header = OatQuickMethodHeader(mapping_table_offset, vmap_table_offset,
gc_map_offset, frame_size_in_bytes, core_spill_mask,
fp_spill_mask, code_size);
if (!deduped) {
// Update offsets. (Checksum is updated when writing.)
offset_ += sizeof(*method_header); // Method header is prepended before code.
offset_ += code_size;
// Record absolute patch locations.
if (!compiled_method->GetPatches().empty()) {
uintptr_t base_loc = offset_ - code_size - writer_->oat_header_->GetExecutableOffset();
for (const LinkerPatch& patch : compiled_method->GetPatches()) {
if (!patch.IsPcRelative()) {
writer_->absolute_patch_locations_.push_back(base_loc + patch.LiteralOffset());
}
}
}
}
if (writer_->compiler_driver_->GetCompilerOptions().GenerateAnyDebugInfo()) {
// Record debug information for this function if we are doing that.
const uint32_t quick_code_start = quick_code_offset -
writer_->oat_header_->GetExecutableOffset() - thumb_offset;
writer_->method_info_.push_back(debug::MethodDebugInfo {
dex_file_,
class_def_index_,
it.GetMemberIndex(),
it.GetMethodAccessFlags(),
it.GetMethodCodeItem(),
deduped,
quick_code_start,
quick_code_start + code_size,
compiled_method});
}
if (kIsDebugBuild) {
// We expect GC maps except when the class hasn't been verified or the method is native.
const CompilerDriver* compiler_driver = writer_->compiler_driver_;
ClassReference class_ref(dex_file_, class_def_index_);
CompiledClass* compiled_class = compiler_driver->GetCompiledClass(class_ref);
mirror::Class::Status status;
if (compiled_class != nullptr) {
status = compiled_class->GetStatus();
} else if (compiler_driver->GetVerificationResults()->IsClassRejected(class_ref)) {
status = mirror::Class::kStatusError;
} else {
status = mirror::Class::kStatusNotReady;
}
ArrayRef<const uint8_t> gc_map = compiled_method->GetGcMap();
if (!gc_map.empty()) {
size_t gc_map_size = gc_map.size() * sizeof(gc_map[0]);
bool is_native = it.MemberIsNative();
CHECK(gc_map_size != 0 || is_native || status < mirror::Class::kStatusVerified)
<< gc_map_size << " " << (is_native ? "true" : "false") << " "
<< (status < mirror::Class::kStatusVerified) << " " << status << " "
<< PrettyMethod(it.GetMemberIndex(), *dex_file_);
}
}
DCHECK_LT(method_offsets_index_, oat_class->method_offsets_.size());
OatMethodOffsets* offsets = &oat_class->method_offsets_[method_offsets_index_];
offsets->code_offset_ = quick_code_offset;
++method_offsets_index_;
}
return true;
}
private:
struct CodeOffsetsKeyComparator {
bool operator()(const CompiledMethod* lhs, const CompiledMethod* rhs) const {
// Code is deduplicated by CompilerDriver, compare only data pointers.
if (lhs->GetQuickCode().data() != rhs->GetQuickCode().data()) {
return lhs->GetQuickCode().data() < rhs->GetQuickCode().data();
}
// If the code is the same, all other fields are likely to be the same as well.
if (UNLIKELY(lhs->GetMappingTable().data() != rhs->GetMappingTable().data())) {
return lhs->GetMappingTable().data() < rhs->GetMappingTable().data();
}
if (UNLIKELY(lhs->GetVmapTable().data() != rhs->GetVmapTable().data())) {
return lhs->GetVmapTable().data() < rhs->GetVmapTable().data();
}
if (UNLIKELY(lhs->GetGcMap().data() != rhs->GetGcMap().data())) {
return lhs->GetGcMap().data() < rhs->GetGcMap().data();
}
if (UNLIKELY(lhs->GetPatches().data() != rhs->GetPatches().data())) {
return lhs->GetPatches().data() < rhs->GetPatches().data();
}
return false;
}
};
uint32_t NewQuickCodeOffset(CompiledMethod* compiled_method,
const ClassDataItemIterator& it,
uint32_t thumb_offset) {
offset_ = writer_->relative_patcher_->ReserveSpace(
offset_, compiled_method, MethodReference(dex_file_, it.GetMemberIndex()));
offset_ = compiled_method->AlignCode(offset_);
DCHECK_ALIGNED_PARAM(offset_,
GetInstructionSetAlignment(compiled_method->GetInstructionSet()));
return offset_ + sizeof(OatQuickMethodHeader) + thumb_offset;
}
// Deduplication is already done on a pointer basis by the compiler driver,
// so we can simply compare the pointers to find out if things are duplicated.
SafeMap<const CompiledMethod*, uint32_t, CodeOffsetsKeyComparator> dedupe_map_;
// Cache of compiler's --debuggable option.
const bool debuggable_;
};
template <typename DataAccess>
class OatWriter::InitMapMethodVisitor : public OatDexMethodVisitor {
public:
InitMapMethodVisitor(OatWriter* writer, size_t offset)
: OatDexMethodVisitor(writer, offset) {
}
bool VisitMethod(size_t class_def_method_index, const ClassDataItemIterator& it ATTRIBUTE_UNUSED)
SHARED_REQUIRES(Locks::mutator_lock_) {
OatClass* oat_class = &writer_->oat_classes_[oat_class_index_];
CompiledMethod* compiled_method = oat_class->GetCompiledMethod(class_def_method_index);
if (compiled_method != nullptr) {
DCHECK_LT(method_offsets_index_, oat_class->method_offsets_.size());
DCHECK_EQ(DataAccess::GetOffset(oat_class, method_offsets_index_), 0u);
ArrayRef<const uint8_t> map = DataAccess::GetData(compiled_method);
uint32_t map_size = map.size() * sizeof(map[0]);
if (map_size != 0u) {
auto lb = dedupe_map_.lower_bound(map.data());
if (lb != dedupe_map_.end() && !dedupe_map_.key_comp()(map.data(), lb->first)) {
DataAccess::SetOffset(oat_class, method_offsets_index_, lb->second);
} else {
DataAccess::SetOffset(oat_class, method_offsets_index_, offset_);
dedupe_map_.PutBefore(lb, map.data(), offset_);
offset_ += map_size;
}
}
++method_offsets_index_;
}
return true;
}
private:
// Deduplication is already done on a pointer basis by the compiler driver,
// so we can simply compare the pointers to find out if things are duplicated.
SafeMap<const uint8_t*, uint32_t> dedupe_map_;
};
class OatWriter::InitImageMethodVisitor : public OatDexMethodVisitor {
public:
InitImageMethodVisitor(OatWriter* writer, size_t offset)
: OatDexMethodVisitor(writer, offset),
pointer_size_(GetInstructionSetPointerSize(writer_->compiler_driver_->GetInstructionSet())) {
}
bool VisitMethod(size_t class_def_method_index, const ClassDataItemIterator& it)
SHARED_REQUIRES(Locks::mutator_lock_) {
const DexFile::TypeId& type_id =
dex_file_->GetTypeId(dex_file_->GetClassDef(class_def_index_).class_idx_);
const char* class_descriptor = dex_file_->GetTypeDescriptor(type_id);
// Skip methods that are not in the image.
if (!writer_->GetCompilerDriver()->IsImageClass(class_descriptor)) {
return true;
}
OatClass* oat_class = &writer_->oat_classes_[oat_class_index_];
CompiledMethod* compiled_method = oat_class->GetCompiledMethod(class_def_method_index);
OatMethodOffsets offsets(0u);
if (compiled_method != nullptr) {
DCHECK_LT(method_offsets_index_, oat_class->method_offsets_.size());
offsets = oat_class->method_offsets_[method_offsets_index_];
++method_offsets_index_;
}
ClassLinker* linker = Runtime::Current()->GetClassLinker();
// Unchecked as we hold mutator_lock_ on entry.
ScopedObjectAccessUnchecked soa(Thread::Current());
StackHandleScope<1> hs(soa.Self());
Handle<mirror::DexCache> dex_cache(hs.NewHandle(linker->FindDexCache(
Thread::Current(), *dex_file_)));
ArtMethod* method;
if (writer_->HasBootImage()) {
const InvokeType invoke_type = it.GetMethodInvokeType(
dex_file_->GetClassDef(class_def_index_));
method = linker->ResolveMethod<ClassLinker::kNoICCECheckForCache>(
*dex_file_,
it.GetMemberIndex(),
dex_cache,
ScopedNullHandle<mirror::ClassLoader>(),
nullptr,
invoke_type);
if (method == nullptr) {
LOG(INTERNAL_FATAL) << "Unexpected failure to resolve a method: "
<< PrettyMethod(it.GetMemberIndex(), *dex_file_, true);
soa.Self()->AssertPendingException();
mirror::Throwable* exc = soa.Self()->GetException();
std::string dump = exc->Dump();
LOG(FATAL) << dump;
UNREACHABLE();
}
} else {
// Should already have been resolved by the compiler, just peek into the dex cache.
// It may not be resolved if the class failed to verify, in this case, don't set the
// entrypoint. This is not fatal since the dex cache will contain a resolution method.
method = dex_cache->GetResolvedMethod(it.GetMemberIndex(), linker->GetImagePointerSize());
}
if (method != nullptr &&
compiled_method != nullptr &&
compiled_method->GetQuickCode().size() != 0) {
method->SetEntryPointFromQuickCompiledCodePtrSize(
reinterpret_cast<void*>(offsets.code_offset_), pointer_size_);
}
return true;
}
protected:
const size_t pointer_size_;
};
class OatWriter::WriteCodeMethodVisitor : public OatDexMethodVisitor {
public:
WriteCodeMethodVisitor(OatWriter* writer, OutputStream* out, const size_t file_offset,
size_t relative_offset) SHARED_LOCK_FUNCTION(Locks::mutator_lock_)
: OatDexMethodVisitor(writer, relative_offset),
out_(out),
file_offset_(file_offset),
soa_(Thread::Current()),
no_thread_suspension_(soa_.Self(), "OatWriter patching"),
class_linker_(Runtime::Current()->GetClassLinker()),
dex_cache_(nullptr) {
patched_code_.reserve(16 * KB);
if (writer_->HasBootImage()) {
// If we're creating the image, the address space must be ready so that we can apply patches.
CHECK(writer_->image_writer_->IsImageAddressSpaceReady());
}
}
~WriteCodeMethodVisitor() UNLOCK_FUNCTION(Locks::mutator_lock_) {
}
bool StartClass(const DexFile* dex_file, size_t class_def_index)
SHARED_REQUIRES(Locks::mutator_lock_) {
OatDexMethodVisitor::StartClass(dex_file, class_def_index);
if (dex_cache_ == nullptr || dex_cache_->GetDexFile() != dex_file) {
dex_cache_ = class_linker_->FindDexCache(Thread::Current(), *dex_file);
}
return true;
}
bool EndClass() SHARED_REQUIRES(Locks::mutator_lock_) {
bool result = OatDexMethodVisitor::EndClass();
if (oat_class_index_ == writer_->oat_classes_.size()) {
DCHECK(result); // OatDexMethodVisitor::EndClass() never fails.
offset_ = writer_->relative_patcher_->WriteThunks(out_, offset_);
if (UNLIKELY(offset_ == 0u)) {
PLOG(ERROR) << "Failed to write final relative call thunks";
result = false;
}
}
return result;
}
bool VisitMethod(size_t class_def_method_index, const ClassDataItemIterator& it)
SHARED_REQUIRES(Locks::mutator_lock_) {
OatClass* oat_class = &writer_->oat_classes_[oat_class_index_];
const CompiledMethod* compiled_method = oat_class->GetCompiledMethod(class_def_method_index);
// No thread suspension since dex_cache_ that may get invalidated if that occurs.
ScopedAssertNoThreadSuspension tsc(Thread::Current(), __FUNCTION__);
if (compiled_method != nullptr) { // ie. not an abstract method
size_t file_offset = file_offset_;
OutputStream* out = out_;
ArrayRef<const uint8_t> quick_code = compiled_method->GetQuickCode();
uint32_t code_size = quick_code.size() * sizeof(uint8_t);
// Deduplicate code arrays.
const OatMethodOffsets& method_offsets = oat_class->method_offsets_[method_offsets_index_];
if (method_offsets.code_offset_ > offset_) {
offset_ = writer_->relative_patcher_->WriteThunks(out, offset_);
if (offset_ == 0u) {
ReportWriteFailure("relative call thunk", it);
return false;
}
uint32_t aligned_offset = compiled_method->AlignCode(offset_);
uint32_t aligned_code_delta = aligned_offset - offset_;
if (aligned_code_delta != 0) {
if (!writer_->WriteCodeAlignment(out, aligned_code_delta)) {
ReportWriteFailure("code alignment padding", it);
return false;
}
offset_ += aligned_code_delta;
DCHECK_OFFSET_();
}
DCHECK_ALIGNED_PARAM(offset_,
GetInstructionSetAlignment(compiled_method->GetInstructionSet()));
DCHECK_EQ(method_offsets.code_offset_,
offset_ + sizeof(OatQuickMethodHeader) + compiled_method->CodeDelta())
<< PrettyMethod(it.GetMemberIndex(), *dex_file_);
const OatQuickMethodHeader& method_header =
oat_class->method_headers_[method_offsets_index_];
if (!writer_->WriteData(out, &method_header, sizeof(method_header))) {
ReportWriteFailure("method header", it);
return false;
}
writer_->size_method_header_ += sizeof(method_header);
offset_ += sizeof(method_header);
DCHECK_OFFSET_();
if (!compiled_method->GetPatches().empty()) {
patched_code_.assign(quick_code.begin(), quick_code.end());
quick_code = ArrayRef<const uint8_t>(patched_code_);
for (const LinkerPatch& patch : compiled_method->GetPatches()) {
if (patch.Type() == kLinkerPatchCallRelative) {
// NOTE: Relative calls across oat files are not supported.
uint32_t target_offset = GetTargetOffset(patch);
uint32_t literal_offset = patch.LiteralOffset();
writer_->relative_patcher_->PatchCall(&patched_code_, literal_offset,
offset_ + literal_offset, target_offset);
} else if (patch.Type() == kLinkerPatchDexCacheArray) {
uint32_t target_offset = GetDexCacheOffset(patch);
uint32_t literal_offset = patch.LiteralOffset();
writer_->relative_patcher_->PatchDexCacheReference(&patched_code_, patch,
offset_ + literal_offset,
target_offset);
} else if (patch.Type() == kLinkerPatchCall) {
uint32_t target_offset = GetTargetOffset(patch);
PatchCodeAddress(&patched_code_, patch.LiteralOffset(), target_offset);
} else if (patch.Type() == kLinkerPatchMethod) {
ArtMethod* method = GetTargetMethod(patch);
PatchMethodAddress(&patched_code_, patch.LiteralOffset(), method);
} else if (patch.Type() == kLinkerPatchType) {
mirror::Class* type = GetTargetType(patch);
PatchObjectAddress(&patched_code_, patch.LiteralOffset(), type);
}
}
}
if (!writer_->WriteData(out, quick_code.data(), code_size)) {
ReportWriteFailure("method code", it);
return false;
}
writer_->size_code_ += code_size;
offset_ += code_size;
}
DCHECK_OFFSET_();
++method_offsets_index_;
}
return true;
}
private:
OutputStream* const out_;
const size_t file_offset_;
const ScopedObjectAccess soa_;
const ScopedAssertNoThreadSuspension no_thread_suspension_;
ClassLinker* const class_linker_;
mirror::DexCache* dex_cache_;
std::vector<uint8_t> patched_code_;
void ReportWriteFailure(const char* what, const ClassDataItemIterator& it) {
PLOG(ERROR) << "Failed to write " << what << " for "
<< PrettyMethod(it.GetMemberIndex(), *dex_file_) << " to " << out_->GetLocation();
}
ArtMethod* GetTargetMethod(const LinkerPatch& patch)
SHARED_REQUIRES(Locks::mutator_lock_) {
MethodReference ref = patch.TargetMethod();
mirror::DexCache* dex_cache =
(dex_file_ == ref.dex_file) ? dex_cache_ : class_linker_->FindDexCache(
Thread::Current(), *ref.dex_file);
ArtMethod* method = dex_cache->GetResolvedMethod(
ref.dex_method_index, class_linker_->GetImagePointerSize());
CHECK(method != nullptr);
return method;
}
uint32_t GetTargetOffset(const LinkerPatch& patch) SHARED_REQUIRES(Locks::mutator_lock_) {
auto target_it = writer_->method_offset_map_.map.find(patch.TargetMethod());
uint32_t target_offset =
(target_it != writer_->method_offset_map_.map.end()) ? target_it->second : 0u;
// If there's no compiled code, point to the correct trampoline.
if (UNLIKELY(target_offset == 0)) {
ArtMethod* target = GetTargetMethod(patch);
DCHECK(target != nullptr);
size_t size = GetInstructionSetPointerSize(writer_->compiler_driver_->GetInstructionSet());
const void* oat_code_offset = target->GetEntryPointFromQuickCompiledCodePtrSize(size);
if (oat_code_offset != 0) {
DCHECK(!Runtime::Current()->GetClassLinker()->IsQuickResolutionStub(oat_code_offset));
DCHECK(!Runtime::Current()->GetClassLinker()->IsQuickToInterpreterBridge(oat_code_offset));
DCHECK(!Runtime::Current()->GetClassLinker()->IsQuickGenericJniStub(oat_code_offset));
target_offset = PointerToLowMemUInt32(oat_code_offset);
} else {
target_offset = target->IsNative()
? writer_->oat_header_->GetQuickGenericJniTrampolineOffset()
: writer_->oat_header_->GetQuickToInterpreterBridgeOffset();
}
}
return target_offset;
}
mirror::Class* GetTargetType(const LinkerPatch& patch)
SHARED_REQUIRES(Locks::mutator_lock_) {
mirror::DexCache* dex_cache = (dex_file_ == patch.TargetTypeDexFile())
? dex_cache_ : class_linker_->FindDexCache(Thread::Current(), *patch.TargetTypeDexFile());
mirror::Class* type = dex_cache->GetResolvedType(patch.TargetTypeIndex());
CHECK(type != nullptr);
return type;
}
uint32_t GetDexCacheOffset(const LinkerPatch& patch) SHARED_REQUIRES(Locks::mutator_lock_) {
if (writer_->HasBootImage()) {
auto* element = writer_->image_writer_->GetDexCacheArrayElementImageAddress<const uint8_t*>(
patch.TargetDexCacheDexFile(), patch.TargetDexCacheElementOffset());
const char* oat_filename = writer_->image_writer_->GetOatFilenameForDexCache(dex_cache_);
const uint8_t* oat_data =
writer_->image_writer_->GetOatFileBegin(oat_filename) + file_offset_;
return element - oat_data;
} else {
size_t start = writer_->dex_cache_arrays_offsets_.Get(patch.TargetDexCacheDexFile());
return start + patch.TargetDexCacheElementOffset();
}
}
void PatchObjectAddress(std::vector<uint8_t>* code, uint32_t offset, mirror::Object* object)
SHARED_REQUIRES(Locks::mutator_lock_) {
if (writer_->HasBootImage()) {
object = writer_->image_writer_->GetImageAddress(object);
} else {
// NOTE: We're using linker patches for app->boot references when the image can
// be relocated and therefore we need to emit .oat_patches. We're not using this
// for app->app references, so check that the object is in the image space.
DCHECK(Runtime::Current()->GetHeap()->FindSpaceFromObject(object, false)->IsImageSpace());
}
// Note: We only patch targeting Objects in image which is in the low 4gb.
uint32_t address = PointerToLowMemUInt32(object);
DCHECK_LE(offset + 4, code->size());
uint8_t* data = &(*code)[offset];
data[0] = address & 0xffu;
data[1] = (address >> 8) & 0xffu;
data[2] = (address >> 16) & 0xffu;
data[3] = (address >> 24) & 0xffu;
}
void PatchMethodAddress(std::vector<uint8_t>* code, uint32_t offset, ArtMethod* method)
SHARED_REQUIRES(Locks::mutator_lock_) {
if (writer_->HasBootImage()) {
method = writer_->image_writer_->GetImageMethodAddress(method);
} else if (kIsDebugBuild) {
// NOTE: We're using linker patches for app->boot references when the image can
// be relocated and therefore we need to emit .oat_patches. We're not using this
// for app->app references, so check that the method is an image method.
std::vector<gc::space::ImageSpace*> image_spaces =
Runtime::Current()->GetHeap()->GetBootImageSpaces();
bool contains_method = false;
for (gc::space::ImageSpace* image_space : image_spaces) {
size_t method_offset = reinterpret_cast<const uint8_t*>(method) - image_space->Begin();
contains_method |=
image_space->GetImageHeader().GetMethodsSection().Contains(method_offset);
}
CHECK(contains_method);
}
// Note: We only patch targeting ArtMethods in image which is in the low 4gb.
uint32_t address = PointerToLowMemUInt32(method);
DCHECK_LE(offset + 4, code->size());
uint8_t* data = &(*code)[offset];
data[0] = address & 0xffu;
data[1] = (address >> 8) & 0xffu;
data[2] = (address >> 16) & 0xffu;
data[3] = (address >> 24) & 0xffu;
}
void PatchCodeAddress(std::vector<uint8_t>* code, uint32_t offset, uint32_t target_offset)
SHARED_REQUIRES(Locks::mutator_lock_) {
uint32_t address = target_offset;
if (writer_->HasBootImage()) {
const char* oat_filename = writer_->image_writer_->GetOatFilenameForDexCache(dex_cache_);
address = PointerToLowMemUInt32(writer_->image_writer_->GetOatFileBegin(oat_filename) +
writer_->oat_data_offset_ + target_offset);
}
DCHECK_LE(offset + 4, code->size());
uint8_t* data = &(*code)[offset];
data[0] = address & 0xffu;
data[1] = (address >> 8) & 0xffu;
data[2] = (address >> 16) & 0xffu;
data[3] = (address >> 24) & 0xffu;
}
};
template <typename DataAccess>
class OatWriter::WriteMapMethodVisitor : public OatDexMethodVisitor {
public:
WriteMapMethodVisitor(OatWriter* writer, OutputStream* out, const size_t file_offset,
size_t relative_offset)
: OatDexMethodVisitor(writer, relative_offset),
out_(out),
file_offset_(file_offset) {
}
bool VisitMethod(size_t class_def_method_index, const ClassDataItemIterator& it) {
OatClass* oat_class = &writer_->oat_classes_[oat_class_index_];
const CompiledMethod* compiled_method = oat_class->GetCompiledMethod(class_def_method_index);
if (compiled_method != nullptr) { // ie. not an abstract method
size_t file_offset = file_offset_;
OutputStream* out = out_;
uint32_t map_offset = DataAccess::GetOffset(oat_class, method_offsets_index_);
++method_offsets_index_;
// Write deduplicated map.
ArrayRef<const uint8_t> map = DataAccess::GetData(compiled_method);
size_t map_size = map.size() * sizeof(map[0]);
DCHECK((map_size == 0u && map_offset == 0u) ||
(map_size != 0u && map_offset != 0u && map_offset <= offset_))
<< map_size << " " << map_offset << " " << offset_ << " "
<< PrettyMethod(it.GetMemberIndex(), *dex_file_) << " for " << DataAccess::Name();
if (map_size != 0u && map_offset == offset_) {
if (UNLIKELY(!writer_->WriteData(out, map.data(), map_size))) {
ReportWriteFailure(it);
return false;
}
offset_ += map_size;
}
DCHECK_OFFSET_();
}
return true;
}
private:
OutputStream* const out_;
size_t const file_offset_;
void ReportWriteFailure(const ClassDataItemIterator& it) {
PLOG(ERROR) << "Failed to write " << DataAccess::Name() << " for "
<< PrettyMethod(it.GetMemberIndex(), *dex_file_) << " to " << out_->GetLocation();
}
};
// Visit all methods from all classes in all dex files with the specified visitor.
bool OatWriter::VisitDexMethods(DexMethodVisitor* visitor) {
for (const DexFile* dex_file : *dex_files_) {
const size_t class_def_count = dex_file->NumClassDefs();
for (size_t class_def_index = 0; class_def_index != class_def_count; ++class_def_index) {
if (UNLIKELY(!visitor->StartClass(dex_file, class_def_index))) {
return false;
}
const DexFile::ClassDef& class_def = dex_file->GetClassDef(class_def_index);
const uint8_t* class_data = dex_file->GetClassData(class_def);
if (class_data != nullptr) { // ie not an empty class, such as a marker interface
ClassDataItemIterator it(*dex_file, class_data);
while (it.HasNextStaticField()) {
it.Next();
}
while (it.HasNextInstanceField()) {
it.Next();
}
size_t class_def_method_index = 0u;
while (it.HasNextDirectMethod()) {
if (!visitor->VisitMethod(class_def_method_index, it)) {
return false;
}
++class_def_method_index;
it.Next();
}
while (it.HasNextVirtualMethod()) {
if (UNLIKELY(!visitor->VisitMethod(class_def_method_index, it))) {
return false;
}
++class_def_method_index;
it.Next();
}
}
if (UNLIKELY(!visitor->EndClass())) {
return false;
}
}
}
return true;
}
size_t OatWriter::InitOatHeader(InstructionSet instruction_set,
const InstructionSetFeatures* instruction_set_features,
uint32_t num_dex_files,
SafeMap<std::string, std::string>* key_value_store) {
TimingLogger::ScopedTiming split("InitOatHeader", timings_);
oat_header_.reset(OatHeader::Create(instruction_set,
instruction_set_features,
num_dex_files,
key_value_store));
size_oat_header_ += sizeof(OatHeader);
size_oat_header_key_value_store_ += oat_header_->GetHeaderSize() - sizeof(OatHeader);
return oat_header_->GetHeaderSize();
}
size_t OatWriter::InitOatDexFiles(size_t offset) {
TimingLogger::ScopedTiming split("InitOatDexFiles", timings_);
// Initialize offsets of dex files.
for (OatDexFile& oat_dex_file : oat_dex_files_) {
oat_dex_file.offset_ = offset;
offset += oat_dex_file.SizeOf();
}
return offset;
}
size_t OatWriter::InitOatClasses(size_t offset) {
// calculate the offsets within OatDexFiles to OatClasses
InitOatClassesMethodVisitor visitor(this, offset);
bool success = VisitDexMethods(&visitor);
CHECK(success);
offset = visitor.GetOffset();
// Update oat_dex_files_.
auto oat_class_it = oat_classes_.begin();
for (OatDexFile& oat_dex_file : oat_dex_files_) {
for (uint32_t& class_offset : oat_dex_file.class_offsets_) {
DCHECK(oat_class_it != oat_classes_.end());
class_offset = oat_class_it->offset_;
++oat_class_it;
}
}
CHECK(oat_class_it == oat_classes_.end());
return offset;
}
size_t OatWriter::InitOatMaps(size_t offset) {
#define VISIT(VisitorType) \
do { \
VisitorType visitor(this, offset); \
bool success = VisitDexMethods(&visitor); \
DCHECK(success); \
offset = visitor.GetOffset(); \
} while (false)
VISIT(InitMapMethodVisitor<GcMapDataAccess>);
VISIT(InitMapMethodVisitor<MappingTableDataAccess>);
VISIT(InitMapMethodVisitor<VmapTableDataAccess>);
#undef VISIT
return offset;
}
size_t OatWriter::InitOatCode(size_t offset) {
// calculate the offsets within OatHeader to executable code
size_t old_offset = offset;
size_t adjusted_offset = offset;
// required to be on a new page boundary
offset = RoundUp(offset, kPageSize);
oat_header_->SetExecutableOffset(offset);
size_executable_offset_alignment_ = offset - old_offset;
if (compiler_driver_->IsBootImage()) {
InstructionSet instruction_set = compiler_driver_->GetInstructionSet();
#define DO_TRAMPOLINE(field, fn_name) \
offset = CompiledCode::AlignCode(offset, instruction_set); \
adjusted_offset = offset + CompiledCode::CodeDelta(instruction_set); \
oat_header_->Set ## fn_name ## Offset(adjusted_offset); \
field.reset(compiler_driver_->Create ## fn_name()); \
offset += field->size();
DO_TRAMPOLINE(jni_dlsym_lookup_, JniDlsymLookup);
DO_TRAMPOLINE(quick_generic_jni_trampoline_, QuickGenericJniTrampoline);
DO_TRAMPOLINE(quick_imt_conflict_trampoline_, QuickImtConflictTrampoline);
DO_TRAMPOLINE(quick_resolution_trampoline_, QuickResolutionTrampoline);
DO_TRAMPOLINE(quick_to_interpreter_bridge_, QuickToInterpreterBridge);
#undef DO_TRAMPOLINE
} else {
oat_header_->SetInterpreterToInterpreterBridgeOffset(0);
oat_header_->SetInterpreterToCompiledCodeBridgeOffset(0);
oat_header_->SetJniDlsymLookupOffset(0);
oat_header_->SetQuickGenericJniTrampolineOffset(0);
oat_header_->SetQuickImtConflictTrampolineOffset(0);
oat_header_->SetQuickResolutionTrampolineOffset(0);
oat_header_->SetQuickToInterpreterBridgeOffset(0);
}
return offset;
}
size_t OatWriter::InitOatCodeDexFiles(size_t offset) {
#define VISIT(VisitorType) \
do { \
VisitorType visitor(this, offset); \
bool success = VisitDexMethods(&visitor); \
DCHECK(success); \
offset = visitor.GetOffset(); \
} while (false)
VISIT(InitCodeMethodVisitor);
if (HasImage()) {
VISIT(InitImageMethodVisitor);
}
#undef VISIT
return offset;
}
bool OatWriter::WriteRodata(OutputStream* out) {
CHECK(write_state_ == WriteState::kWriteRoData);
if (!WriteClassOffsets(out)) {
LOG(ERROR) << "Failed to write class offsets to " << out->GetLocation();
return false;
}
if (!WriteClasses(out)) {
LOG(ERROR) << "Failed to write classes to " << out->GetLocation();
return false;
}
off_t tables_end_offset = out->Seek(0, kSeekCurrent);
if (tables_end_offset == static_cast<off_t>(-1)) {
LOG(ERROR) << "Failed to seek to oat code position in " << out->GetLocation();
return false;
}
size_t file_offset = oat_data_offset_;
size_t relative_offset = static_cast<size_t>(tables_end_offset) - file_offset;
relative_offset = WriteMaps(out, file_offset, relative_offset);
if (relative_offset == 0) {
LOG(ERROR) << "Failed to write oat code to " << out->GetLocation();
return false;
}
// Write padding.
off_t new_offset = out->Seek(size_executable_offset_alignment_, kSeekCurrent);
relative_offset += size_executable_offset_alignment_;
DCHECK_EQ(relative_offset, oat_header_->GetExecutableOffset());
size_t expected_file_offset = file_offset + relative_offset;
if (static_cast<uint32_t>(new_offset) != expected_file_offset) {
PLOG(ERROR) << "Failed to seek to oat code section. Actual: " << new_offset
<< " Expected: " << expected_file_offset << " File: " << out->GetLocation();
return 0;
}
DCHECK_OFFSET();
write_state_ = WriteState::kWriteText;
return true;
}
bool OatWriter::WriteCode(OutputStream* out) {
CHECK(write_state_ == WriteState::kWriteText);
const size_t file_offset = oat_data_offset_;
size_t relative_offset = oat_header_->GetExecutableOffset();
DCHECK_OFFSET();
relative_offset = WriteCode(out, file_offset, relative_offset);
if (relative_offset == 0) {
LOG(ERROR) << "Failed to write oat code to " << out->GetLocation();
return false;
}
relative_offset = WriteCodeDexFiles(out, file_offset, relative_offset);
if (relative_offset == 0) {
LOG(ERROR) << "Failed to write oat code for dex files to " << out->GetLocation();
return false;
}
const off_t oat_end_file_offset = out->Seek(0, kSeekCurrent);
if (oat_end_file_offset == static_cast<off_t>(-1)) {
LOG(ERROR) << "Failed to get oat end file offset in " << out->GetLocation();
return false;
}
if (kIsDebugBuild) {
uint32_t size_total = 0;
#define DO_STAT(x) \
VLOG(compiler) << #x "=" << PrettySize(x) << " (" << x << "B)"; \
size_total += x;
DO_STAT(size_dex_file_alignment_);
DO_STAT(size_executable_offset_alignment_);
DO_STAT(size_oat_header_);
DO_STAT(size_oat_header_key_value_store_);
DO_STAT(size_dex_file_);
DO_STAT(size_interpreter_to_interpreter_bridge_);
DO_STAT(size_interpreter_to_compiled_code_bridge_);
DO_STAT(size_jni_dlsym_lookup_);
DO_STAT(size_quick_generic_jni_trampoline_);
DO_STAT(size_quick_imt_conflict_trampoline_);
DO_STAT(size_quick_resolution_trampoline_);
DO_STAT(size_quick_to_interpreter_bridge_);
DO_STAT(size_trampoline_alignment_);
DO_STAT(size_method_header_);
DO_STAT(size_code_);
DO_STAT(size_code_alignment_);
DO_STAT(size_relative_call_thunks_);
DO_STAT(size_misc_thunks_);
DO_STAT(size_mapping_table_);
DO_STAT(size_vmap_table_);
DO_STAT(size_gc_map_);
DO_STAT(size_oat_dex_file_location_size_);
DO_STAT(size_oat_dex_file_location_data_);
DO_STAT(size_oat_dex_file_location_checksum_);
DO_STAT(size_oat_dex_file_offset_);
DO_STAT(size_oat_dex_file_class_offsets_offset_);
DO_STAT(size_oat_dex_file_lookup_table_offset_);
DO_STAT(size_oat_lookup_table_alignment_);
DO_STAT(size_oat_lookup_table_);
DO_STAT(size_oat_class_offsets_alignment_);
DO_STAT(size_oat_class_offsets_);
DO_STAT(size_oat_class_type_);
DO_STAT(size_oat_class_status_);
DO_STAT(size_oat_class_method_bitmaps_);
DO_STAT(size_oat_class_method_offsets_);
#undef DO_STAT
VLOG(compiler) << "size_total=" << PrettySize(size_total) << " (" << size_total << "B)"; \
CHECK_EQ(file_offset + size_total, static_cast<size_t>(oat_end_file_offset));
CHECK_EQ(size_, size_total);
}
CHECK_EQ(file_offset + size_, static_cast<size_t>(oat_end_file_offset));
CHECK_EQ(size_, relative_offset);
write_state_ = WriteState::kWriteHeader;
return true;
}
bool OatWriter::WriteHeader(OutputStream* out,
uint32_t image_file_location_oat_checksum,
uintptr_t image_file_location_oat_begin,
int32_t image_patch_delta) {
CHECK(write_state_ == WriteState::kWriteHeader);
oat_header_->SetImageFileLocationOatChecksum(image_file_location_oat_checksum);
oat_header_->SetImageFileLocationOatDataBegin(image_file_location_oat_begin);
if (compiler_driver_->IsBootImage()) {
CHECK_EQ(image_patch_delta, 0);
CHECK_EQ(oat_header_->GetImagePatchDelta(), 0);
} else {
CHECK_ALIGNED(image_patch_delta, kPageSize);
oat_header_->SetImagePatchDelta(image_patch_delta);
}
oat_header_->UpdateChecksumWithHeaderData();
const size_t file_offset = oat_data_offset_;
off_t current_offset = out->Seek(0, kSeekCurrent);
if (current_offset == static_cast<off_t>(-1)) {
PLOG(ERROR) << "Failed to get current offset from " << out->GetLocation();
return false;
}
if (out->Seek(file_offset, kSeekSet) == static_cast<off_t>(-1)) {
PLOG(ERROR) << "Failed to seek to oat header position in " << out->GetLocation();
return false;
}
DCHECK_EQ(file_offset, static_cast<size_t>(out->Seek(0, kSeekCurrent)));
// Flush all other data before writing the header.
if (!out->Flush()) {
PLOG(ERROR) << "Failed to flush before writing oat header to " << out->GetLocation();
return false;
}
// Write the header.
size_t header_size = oat_header_->GetHeaderSize();
if (!out->WriteFully(oat_header_.get(), header_size)) {
PLOG(ERROR) << "Failed to write oat header to " << out->GetLocation();
return false;
}
// Flush the header data.
if (!out->Flush()) {
PLOG(ERROR) << "Failed to flush after writing oat header to " << out->GetLocation();
return false;
}
if (out->Seek(current_offset, kSeekSet) == static_cast<off_t>(-1)) {
PLOG(ERROR) << "Failed to seek back after writing oat header to " << out->GetLocation();
return false;
}
DCHECK_EQ(current_offset, out->Seek(0, kSeekCurrent));
write_state_ = WriteState::kDone;
return true;
}
bool OatWriter::WriteClassOffsets(OutputStream* out) {
for (OatDexFile& oat_dex_file : oat_dex_files_) {
if (oat_dex_file.class_offsets_offset_ != 0u) {
uint32_t expected_offset = oat_data_offset_ + oat_dex_file.class_offsets_offset_;
off_t actual_offset = out->Seek(expected_offset, kSeekSet);
if (static_cast<uint32_t>(actual_offset) != expected_offset) {
PLOG(ERROR) << "Failed to seek to oat class offsets section. Actual: " << actual_offset
<< " Expected: " << expected_offset << " File: " << oat_dex_file.GetLocation();
return false;
}
if (!oat_dex_file.WriteClassOffsets(this, out)) {
return false;
}
}
}
return true;
}
bool OatWriter::WriteClasses(OutputStream* out) {
for (OatClass& oat_class : oat_classes_) {
if (!oat_class.Write(this, out, oat_data_offset_)) {
PLOG(ERROR) << "Failed to write oat methods information to " << out->GetLocation();
return false;
}
}
return true;
}
size_t OatWriter::WriteMaps(OutputStream* out, const size_t file_offset, size_t relative_offset) {
#define VISIT(VisitorType) \
do { \
VisitorType visitor(this, out, file_offset, relative_offset); \
if (UNLIKELY(!VisitDexMethods(&visitor))) { \
return 0; \
} \
relative_offset = visitor.GetOffset(); \
} while (false)
size_t gc_maps_offset = relative_offset;
VISIT(WriteMapMethodVisitor<GcMapDataAccess>);
size_gc_map_ = relative_offset - gc_maps_offset;
size_t mapping_tables_offset = relative_offset;
VISIT(WriteMapMethodVisitor<MappingTableDataAccess>);
size_mapping_table_ = relative_offset - mapping_tables_offset;
size_t vmap_tables_offset = relative_offset;
VISIT(WriteMapMethodVisitor<VmapTableDataAccess>);
size_vmap_table_ = relative_offset - vmap_tables_offset;
#undef VISIT
return relative_offset;
}
size_t OatWriter::WriteCode(OutputStream* out, const size_t file_offset, size_t relative_offset) {
if (compiler_driver_->IsBootImage()) {
InstructionSet instruction_set = compiler_driver_->GetInstructionSet();
#define DO_TRAMPOLINE(field) \
do { \
uint32_t aligned_offset = CompiledCode::AlignCode(relative_offset, instruction_set); \
uint32_t alignment_padding = aligned_offset - relative_offset; \
out->Seek(alignment_padding, kSeekCurrent); \
size_trampoline_alignment_ += alignment_padding; \
if (!WriteData(out, field->data(), field->size())) { \
PLOG(ERROR) << "Failed to write " # field " to " << out->GetLocation(); \
return false; \
} \
size_ ## field += field->size(); \
relative_offset += alignment_padding + field->size(); \
DCHECK_OFFSET(); \
} while (false)
DO_TRAMPOLINE(jni_dlsym_lookup_);
DO_TRAMPOLINE(quick_generic_jni_trampoline_);
DO_TRAMPOLINE(quick_imt_conflict_trampoline_);
DO_TRAMPOLINE(quick_resolution_trampoline_);
DO_TRAMPOLINE(quick_to_interpreter_bridge_);
#undef DO_TRAMPOLINE
}
return relative_offset;
}
size_t OatWriter::WriteCodeDexFiles(OutputStream* out,
const size_t file_offset,
size_t relative_offset) {
#define VISIT(VisitorType) \
do { \
VisitorType visitor(this, out, file_offset, relative_offset); \
if (UNLIKELY(!VisitDexMethods(&visitor))) { \
return 0; \
} \
relative_offset = visitor.GetOffset(); \
} while (false)
VISIT(WriteCodeMethodVisitor);
#undef VISIT
size_code_alignment_ += relative_patcher_->CodeAlignmentSize();
size_relative_call_thunks_ += relative_patcher_->RelativeCallThunksSize();
size_misc_thunks_ += relative_patcher_->MiscThunksSize();
return relative_offset;
}
bool OatWriter::GetOatDataOffset(OutputStream* out) {
// Get the elf file offset of the oat file.
const off_t raw_file_offset = out->Seek(0, kSeekCurrent);
if (raw_file_offset == static_cast<off_t>(-1)) {
LOG(ERROR) << "Failed to get file offset in " << out->GetLocation();
return false;
}
oat_data_offset_ = static_cast<size_t>(raw_file_offset);
return true;
}
bool OatWriter::ReadDexFileHeader(File* file, OatDexFile* oat_dex_file) {
// Read the dex file header and perform minimal verification.
uint8_t raw_header[sizeof(DexFile::Header)];
if (!file->ReadFully(&raw_header, sizeof(DexFile::Header))) {
PLOG(ERROR) << "Failed to read dex file header. Actual: "
<< " File: " << oat_dex_file->GetLocation() << " Output: " << file->GetPath();
return false;
}
if (!ValidateDexFileHeader(raw_header, oat_dex_file->GetLocation())) {
return false;
}
const UnalignedDexFileHeader* header = AsUnalignedDexFileHeader(raw_header);
oat_dex_file->dex_file_size_ = header->file_size_;
oat_dex_file->dex_file_location_checksum_ = header->checksum_;
oat_dex_file->class_offsets_.resize(header->class_defs_size_);
return true;
}
bool OatWriter::ValidateDexFileHeader(const uint8_t* raw_header, const char* location) {
if (!DexFile::IsMagicValid(raw_header)) {
LOG(ERROR) << "Invalid magic number in dex file header. " << " File: " << location;
return false;
}
if (!DexFile::IsVersionValid(raw_header)) {
LOG(ERROR) << "Invalid version number in dex file header. " << " File: " << location;
return false;
}
const UnalignedDexFileHeader* header = AsUnalignedDexFileHeader(raw_header);
if (header->file_size_ < sizeof(DexFile::Header)) {
LOG(ERROR) << "Dex file header specifies file size insufficient to contain the header."
<< " File: " << location;
return false;
}
return true;
}
bool OatWriter::WriteDexFiles(OutputStream* rodata, File* file) {
TimingLogger::ScopedTiming split("WriteDexFiles", timings_);
// Get the elf file offset of the oat file.
if (!GetOatDataOffset(rodata)) {
return false;
}
// Write dex files.
for (OatDexFile& oat_dex_file : oat_dex_files_) {
if (!WriteDexFile(rodata, file, &oat_dex_file)) {
return false;
}
}
// Close sources.
for (OatDexFile& oat_dex_file : oat_dex_files_) {
oat_dex_file.source_.Clear(); // Get rid of the reference, it's about to be invalidated.
}
zipped_dex_files_.clear();
zip_archives_.clear();
raw_dex_files_.clear();
return true;
}
bool OatWriter::WriteDexFile(OutputStream* rodata, File* file, OatDexFile* oat_dex_file) {
if (!SeekToDexFile(rodata, file, oat_dex_file)) {
return false;
}
if (oat_dex_file->source_.IsZipEntry()) {
if (!WriteDexFile(rodata, file, oat_dex_file, oat_dex_file->source_.GetZipEntry())) {
return false;
}
} else if (oat_dex_file->source_.IsRawFile()) {
if (!WriteDexFile(rodata, file, oat_dex_file, oat_dex_file->source_.GetRawFile())) {
return false;
}
} else {
DCHECK(oat_dex_file->source_.IsRawData());
if (!WriteDexFile(rodata, oat_dex_file, oat_dex_file->source_.GetRawData())) {
return false;
}
}
// Update current size and account for the written data.
DCHECK_EQ(size_, oat_dex_file->dex_file_offset_);
size_ += oat_dex_file->dex_file_size_;
size_dex_file_ += oat_dex_file->dex_file_size_;
return true;
}
bool OatWriter::SeekToDexFile(OutputStream* out, File* file, OatDexFile* oat_dex_file) {
// Dex files are required to be 4 byte aligned.
size_t original_offset = size_;
size_t offset = RoundUp(original_offset, 4);
size_dex_file_alignment_ += offset - original_offset;
// Seek to the start of the dex file and flush any pending operations in the stream.
// Verify that, after flushing the stream, the file is at the same offset as the stream.
uint32_t start_offset = oat_data_offset_ + offset;
off_t actual_offset = out->Seek(start_offset, kSeekSet);
if (actual_offset != static_cast<off_t>(start_offset)) {
PLOG(ERROR) << "Failed to seek to dex file section. Actual: " << actual_offset
<< " Expected: " << start_offset
<< " File: " << oat_dex_file->GetLocation() << " Output: " << file->GetPath();
return false;
}
if (!out->Flush()) {
PLOG(ERROR) << "Failed to flush before writing dex file."
<< " File: " << oat_dex_file->GetLocation() << " Output: " << file->GetPath();
return false;
}
actual_offset = lseek(file->Fd(), 0, SEEK_CUR);
if (actual_offset != static_cast<off_t>(start_offset)) {
PLOG(ERROR) << "Stream/file position mismatch! Actual: " << actual_offset
<< " Expected: " << start_offset
<< " File: " << oat_dex_file->GetLocation() << " Output: " << file->GetPath();
return false;
}
size_ = offset;
oat_dex_file->dex_file_offset_ = offset;
return true;
}
bool OatWriter::WriteDexFile(OutputStream* rodata,
File* file,
OatDexFile* oat_dex_file,
ZipEntry* dex_file) {
size_t start_offset = oat_data_offset_ + size_;
DCHECK_EQ(static_cast<off_t>(start_offset), rodata->Seek(0, kSeekCurrent));
// Extract the dex file and get the extracted size.
std::string error_msg;
if (!dex_file->ExtractToFile(*file, &error_msg)) {
LOG(ERROR) << "Failed to extract dex file from ZIP entry: " << error_msg
<< " File: " << oat_dex_file->GetLocation() << " Output: " << file->GetPath();
return false;
}
if (file->Flush() != 0) {
PLOG(ERROR) << "Failed to flush dex file from ZIP entry."
<< " File: " << oat_dex_file->GetLocation() << " Output: " << file->GetPath();
return false;
}
off_t extracted_end = lseek(file->Fd(), 0, SEEK_CUR);
if (extracted_end == static_cast<off_t>(-1)) {
PLOG(ERROR) << "Failed get end offset after writing dex file from ZIP entry."
<< " File: " << oat_dex_file->GetLocation() << " Output: " << file->GetPath();
return false;
}
if (extracted_end < static_cast<off_t>(start_offset)) {
LOG(ERROR) << "Dex file end position is before start position! End: " << extracted_end
<< " Start: " << start_offset
<< " File: " << oat_dex_file->GetLocation() << " Output: " << file->GetPath();
return false;
}
uint64_t extracted_size = static_cast<uint64_t>(extracted_end - start_offset);
if (extracted_size < sizeof(DexFile::Header)) {
LOG(ERROR) << "Extracted dex file is shorter than dex file header. size: "
<< extracted_size << " File: " << oat_dex_file->GetLocation();
return false;
}
// Read the dex file header and extract required data to OatDexFile.
off_t actual_offset = lseek(file->Fd(), start_offset, SEEK_SET);
if (actual_offset != static_cast<off_t>(start_offset)) {
PLOG(ERROR) << "Failed to seek back to dex file header. Actual: " << actual_offset
<< " Expected: " << start_offset
<< " File: " << oat_dex_file->GetLocation() << " Output: " << file->GetPath();
return false;
}
if (!ReadDexFileHeader(file, oat_dex_file)) {
return false;
}
if (extracted_size < oat_dex_file->dex_file_size_) {
LOG(ERROR) << "Extracted truncated dex file. Extracted size: " << extracted_size
<< " file size from header: " << oat_dex_file->dex_file_size_
<< " File: " << oat_dex_file->GetLocation();
return false;
}
// Override the checksum from header with the CRC from ZIP entry.
oat_dex_file->dex_file_location_checksum_ = dex_file->GetCrc32();
// Seek both file and stream to the end offset.
size_t end_offset = start_offset + oat_dex_file->dex_file_size_;
actual_offset = lseek(file->Fd(), end_offset, SEEK_SET);
if (actual_offset != static_cast<off_t>(end_offset)) {
PLOG(ERROR) << "Failed to seek to end of dex file. Actual: " << actual_offset
<< " Expected: " << end_offset
<< " File: " << oat_dex_file->GetLocation() << " Output: " << file->GetPath();
return false;
}
actual_offset = rodata->Seek(end_offset, kSeekSet);
if (actual_offset != static_cast<off_t>(end_offset)) {
PLOG(ERROR) << "Failed to seek stream to end of dex file. Actual: " << actual_offset
<< " Expected: " << end_offset << " File: " << oat_dex_file->GetLocation();
return false;
}
if (!rodata->Flush()) {
PLOG(ERROR) << "Failed to flush stream after seeking over dex file."
<< " File: " << oat_dex_file->GetLocation() << " Output: " << file->GetPath();
return false;
}
// If we extracted more than the size specified in the header, truncate the file.
if (extracted_size > oat_dex_file->dex_file_size_) {
if (file->SetLength(end_offset) != 0) {
PLOG(ERROR) << "Failed to truncate excessive dex file length."
<< " File: " << oat_dex_file->GetLocation() << " Output: " << file->GetPath();
return false;
}
}
return true;
}
bool OatWriter::WriteDexFile(OutputStream* rodata,
File* file,
OatDexFile* oat_dex_file,
File* dex_file) {
size_t start_offset = oat_data_offset_ + size_;
DCHECK_EQ(static_cast<off_t>(start_offset), rodata->Seek(0, kSeekCurrent));
off_t input_offset = lseek(dex_file->Fd(), 0, SEEK_SET);
if (input_offset != static_cast<off_t>(0)) {
PLOG(ERROR) << "Failed to seek to dex file header. Actual: " << input_offset
<< " Expected: 0"
<< " File: " << oat_dex_file->GetLocation() << " Output: " << file->GetPath();
return false;
}
if (!ReadDexFileHeader(dex_file, oat_dex_file)) {
return false;
}
// Copy the input dex file using sendfile().
if (!file->Copy(dex_file, 0, oat_dex_file->dex_file_size_)) {
PLOG(ERROR) << "Failed to copy dex file to oat file."
<< " File: " << oat_dex_file->GetLocation() << " Output: " << file->GetPath();
return false;
}
if (file->Flush() != 0) {
PLOG(ERROR) << "Failed to flush dex file."
<< " File: " << oat_dex_file->GetLocation() << " Output: " << file->GetPath();
return false;
}
// Check file position and seek the stream to the end offset.
size_t end_offset = start_offset + oat_dex_file->dex_file_size_;
off_t actual_offset = lseek(file->Fd(), 0, SEEK_CUR);
if (actual_offset != static_cast<off_t>(end_offset)) {
PLOG(ERROR) << "Unexpected file position after copying dex file. Actual: " << actual_offset
<< " Expected: " << end_offset
<< " File: " << oat_dex_file->GetLocation() << " Output: " << file->GetPath();
return false;
}
actual_offset = rodata->Seek(end_offset, kSeekSet);
if (actual_offset != static_cast<off_t>(end_offset)) {
PLOG(ERROR) << "Failed to seek stream to end of dex file. Actual: " << actual_offset
<< " Expected: " << end_offset << " File: " << oat_dex_file->GetLocation();
return false;
}
if (!rodata->Flush()) {
PLOG(ERROR) << "Failed to flush stream after seeking over dex file."
<< " File: " << oat_dex_file->GetLocation() << " Output: " << file->GetPath();
return false;
}
return true;
}
bool OatWriter::WriteDexFile(OutputStream* rodata,
OatDexFile* oat_dex_file,
const uint8_t* dex_file) {
// Note: The raw data has already been checked to contain the header
// and all the data that the header specifies as the file size.
DCHECK(dex_file != nullptr);
DCHECK(ValidateDexFileHeader(dex_file, oat_dex_file->GetLocation()));
const UnalignedDexFileHeader* header = AsUnalignedDexFileHeader(dex_file);
if (!rodata->WriteFully(dex_file, header->file_size_)) {
PLOG(ERROR) << "Failed to write dex file " << oat_dex_file->GetLocation()
<< " to " << rodata->GetLocation();
return false;
}
if (!rodata->Flush()) {
PLOG(ERROR) << "Failed to flush stream after writing dex file."
<< " File: " << oat_dex_file->GetLocation();
return false;
}
// Update dex file size and resize class offsets in the OatDexFile.
// Note: For raw data, the checksum is passed directly to AddRawDexFileSource().
oat_dex_file->dex_file_size_ = header->file_size_;
oat_dex_file->class_offsets_.resize(header->class_defs_size_);
return true;
}
bool OatWriter::WriteOatDexFiles(OutputStream* rodata) {
TimingLogger::ScopedTiming split("WriteOatDexFiles", timings_);
// Seek to the start of OatDexFiles, i.e. to the end of the OatHeader. If there are
// no OatDexFiles, no data is actually written to .rodata before WriteHeader() and
// this Seek() ensures that we reserve the space for OatHeader in .rodata.
DCHECK(oat_dex_files_.empty() || oat_dex_files_[0u].offset_ == oat_header_->GetHeaderSize());
uint32_t expected_offset = oat_data_offset_ + oat_header_->GetHeaderSize();
off_t actual_offset = rodata->Seek(expected_offset, kSeekSet);
if (static_cast<uint32_t>(actual_offset) != expected_offset) {
PLOG(ERROR) << "Failed to seek to OatDexFile table section. Actual: " << actual_offset
<< " Expected: " << expected_offset << " File: " << rodata->GetLocation();
return false;
}
for (size_t i = 0, size = oat_dex_files_.size(); i != size; ++i) {
OatDexFile* oat_dex_file = &oat_dex_files_[i];
DCHECK_EQ(oat_data_offset_ + oat_dex_file->offset_,
static_cast<size_t>(rodata->Seek(0, kSeekCurrent)));
// Write OatDexFile.
if (!oat_dex_file->Write(this, rodata)) {
PLOG(ERROR) << "Failed to write oat dex information to " << rodata->GetLocation();
return false;
}
}
return true;
}
bool OatWriter::ExtendForTypeLookupTables(OutputStream* rodata, File* file, size_t offset) {
TimingLogger::ScopedTiming split("ExtendForTypeLookupTables", timings_);
int64_t new_length = oat_data_offset_ + dchecked_integral_cast<int64_t>(offset);
if (file->SetLength(new_length) != 0) {
PLOG(ERROR) << "Failed to extend file for type lookup tables. new_length: " << new_length
<< "File: " << file->GetPath();
return false;
}
off_t actual_offset = rodata->Seek(new_length, kSeekSet);
if (actual_offset != static_cast<off_t>(new_length)) {
PLOG(ERROR) << "Failed to seek stream after extending file for type lookup tables."
<< " Actual: " << actual_offset << " Expected: " << new_length
<< " File: " << rodata->GetLocation();
return false;
}
if (!rodata->Flush()) {
PLOG(ERROR) << "Failed to flush stream after extending for type lookup tables."
<< " File: " << rodata->GetLocation();
return false;
}
return true;
}
bool OatWriter::OpenDexFiles(
File* file,
bool verify,
/*out*/ std::unique_ptr<MemMap>* opened_dex_files_map,
/*out*/ std::vector<std::unique_ptr<const DexFile>>* opened_dex_files) {
TimingLogger::ScopedTiming split("OpenDexFiles", timings_);
if (oat_dex_files_.empty()) {
// Nothing to do.
return true;
}
size_t map_offset = oat_dex_files_[0].dex_file_offset_;
size_t length = size_ - map_offset;
std::string error_msg;
std::unique_ptr<MemMap> dex_files_map(MemMap::MapFile(length,
PROT_READ | PROT_WRITE,
MAP_SHARED,
file->Fd(),
oat_data_offset_ + map_offset,
/* low_4gb */ false,
file->GetPath().c_str(),
&error_msg));
if (dex_files_map == nullptr) {
LOG(ERROR) << "Failed to mmap() dex files from oat file. File: " << file->GetPath()
<< " error: " << error_msg;
return false;
}
std::vector<std::unique_ptr<const DexFile>> dex_files;
for (OatDexFile& oat_dex_file : oat_dex_files_) {
// Make sure no one messed with input files while we were copying data.
// At the very least we need consistent file size and number of class definitions.
const uint8_t* raw_dex_file =
dex_files_map->Begin() + oat_dex_file.dex_file_offset_ - map_offset;
if (!ValidateDexFileHeader(raw_dex_file, oat_dex_file.GetLocation())) {
// Note: ValidateDexFileHeader() already logged an error message.
LOG(ERROR) << "Failed to verify written dex file header!"
<< " Output: " << file->GetPath() << " ~ " << std::hex << map_offset
<< " ~ " << static_cast<const void*>(raw_dex_file);
return false;
}
const UnalignedDexFileHeader* header = AsUnalignedDexFileHeader(raw_dex_file);
if (header->file_size_ != oat_dex_file.dex_file_size_) {
LOG(ERROR) << "File size mismatch in written dex file header! Expected: "
<< oat_dex_file.dex_file_size_ << " Actual: " << header->file_size_
<< " Output: " << file->GetPath();
return false;
}
if (header->class_defs_size_ != oat_dex_file.class_offsets_.size()) {
LOG(ERROR) << "Class defs size mismatch in written dex file header! Expected: "
<< oat_dex_file.class_offsets_.size() << " Actual: " << header->class_defs_size_
<< " Output: " << file->GetPath();
return false;
}
// Now, open the dex file.
dex_files.emplace_back(DexFile::Open(raw_dex_file,
oat_dex_file.dex_file_size_,
oat_dex_file.GetLocation(),
oat_dex_file.dex_file_location_checksum_,
/* oat_dex_file */ nullptr,
verify,
&error_msg));
if (dex_files.back() == nullptr) {
LOG(ERROR) << "Failed to open dex file from oat file. File: " << oat_dex_file.GetLocation()
<< " Error: " << error_msg;
return false;
}
}
*opened_dex_files_map = std::move(dex_files_map);
*opened_dex_files = std::move(dex_files);
return true;
}
bool OatWriter::WriteTypeLookupTables(
MemMap* opened_dex_files_map,
const std::vector<std::unique_ptr<const DexFile>>& opened_dex_files) {
TimingLogger::ScopedTiming split("WriteTypeLookupTables", timings_);
DCHECK_EQ(opened_dex_files.size(), oat_dex_files_.size());
for (size_t i = 0, size = opened_dex_files.size(); i != size; ++i) {
OatDexFile* oat_dex_file = &oat_dex_files_[i];
if (oat_dex_file->lookup_table_offset_ != 0u) {
DCHECK(oat_dex_file->create_type_lookup_table_ == CreateTypeLookupTable::kCreate);
DCHECK_NE(oat_dex_file->class_offsets_.size(), 0u);
size_t map_offset = oat_dex_files_[0].dex_file_offset_;
size_t lookup_table_offset = oat_dex_file->lookup_table_offset_;
uint8_t* lookup_table = opened_dex_files_map->Begin() + (lookup_table_offset - map_offset);
opened_dex_files[i]->CreateTypeLookupTable(lookup_table);
}
}
DCHECK_EQ(opened_dex_files_map == nullptr, opened_dex_files.empty());
if (opened_dex_files_map != nullptr && !opened_dex_files_map->Sync()) {
PLOG(ERROR) << "Failed to Sync() type lookup tables. Map: " << opened_dex_files_map->GetName();
return false;
}
return true;
}
bool OatWriter::WriteCodeAlignment(OutputStream* out, uint32_t aligned_code_delta) {
static const uint8_t kPadding[] = {
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u
};
DCHECK_LE(aligned_code_delta, sizeof(kPadding));
if (UNLIKELY(!out->WriteFully(kPadding, aligned_code_delta))) {
return false;
}
size_code_alignment_ += aligned_code_delta;
return true;
}
bool OatWriter::WriteData(OutputStream* out, const void* data, size_t size) {
oat_header_->UpdateChecksum(data, size);
return out->WriteFully(data, size);
}
std::pair<bool, uint32_t> OatWriter::MethodOffsetMap::FindMethodOffset(MethodReference ref) {
auto it = map.find(ref);
if (it == map.end()) {
return std::pair<bool, uint32_t>(false, 0u);
} else {
return std::pair<bool, uint32_t>(true, it->second);
}
}
OatWriter::OatDexFile::OatDexFile(const char* dex_file_location,
DexFileSource source,
CreateTypeLookupTable create_type_lookup_table)
: source_(source),
create_type_lookup_table_(create_type_lookup_table),
dex_file_size_(0),
offset_(0),
dex_file_location_size_(strlen(dex_file_location)),
dex_file_location_data_(dex_file_location),
dex_file_location_checksum_(0u),
dex_file_offset_(0u),
class_offsets_offset_(0u),
lookup_table_offset_(0u),
class_offsets_() {
}
size_t OatWriter::OatDexFile::SizeOf() const {
return sizeof(dex_file_location_size_)
+ dex_file_location_size_
+ sizeof(dex_file_location_checksum_)
+ sizeof(dex_file_offset_)
+ sizeof(class_offsets_offset_)
+ sizeof(lookup_table_offset_);
}
void OatWriter::OatDexFile::ReserveTypeLookupTable(OatWriter* oat_writer) {
DCHECK_EQ(lookup_table_offset_, 0u);
if (create_type_lookup_table_ == CreateTypeLookupTable::kCreate && !class_offsets_.empty()) {
size_t table_size = TypeLookupTable::RawDataLength(class_offsets_.size());
if (table_size != 0u) {
// Type tables are required to be 4 byte aligned.
size_t original_offset = oat_writer->size_;
size_t offset = RoundUp(original_offset, 4);
oat_writer->size_oat_lookup_table_alignment_ += offset - original_offset;
lookup_table_offset_ = offset;
oat_writer->size_ = offset + table_size;
oat_writer->size_oat_lookup_table_ += table_size;
}
}
}
void OatWriter::OatDexFile::ReserveClassOffsets(OatWriter* oat_writer) {
DCHECK_EQ(class_offsets_offset_, 0u);
if (!class_offsets_.empty()) {
// Class offsets are required to be 4 byte aligned.
size_t original_offset = oat_writer->size_;
size_t offset = RoundUp(original_offset, 4);
oat_writer->size_oat_class_offsets_alignment_ += offset - original_offset;
class_offsets_offset_ = offset;
oat_writer->size_ = offset + GetClassOffsetsRawSize();
}
}
bool OatWriter::OatDexFile::Write(OatWriter* oat_writer, OutputStream* out) const {
const size_t file_offset = oat_writer->oat_data_offset_;
DCHECK_OFFSET_();
if (!oat_writer->WriteData(out, &dex_file_location_size_, sizeof(dex_file_location_size_))) {
PLOG(ERROR) << "Failed to write dex file location length to " << out->GetLocation();
return false;
}
oat_writer->size_oat_dex_file_location_size_ += sizeof(dex_file_location_size_);
if (!oat_writer->WriteData(out, dex_file_location_data_, dex_file_location_size_)) {
PLOG(ERROR) << "Failed to write dex file location data to " << out->GetLocation();
return false;
}
oat_writer->size_oat_dex_file_location_data_ += dex_file_location_size_;
if (!oat_writer->WriteData(out,
&dex_file_location_checksum_,
sizeof(dex_file_location_checksum_))) {
PLOG(ERROR) << "Failed to write dex file location checksum to " << out->GetLocation();
return false;
}
oat_writer->size_oat_dex_file_location_checksum_ += sizeof(dex_file_location_checksum_);
if (!oat_writer->WriteData(out, &dex_file_offset_, sizeof(dex_file_offset_))) {
PLOG(ERROR) << "Failed to write dex file offset to " << out->GetLocation();
return false;
}
oat_writer->size_oat_dex_file_offset_ += sizeof(dex_file_offset_);
if (!oat_writer->WriteData(out, &class_offsets_offset_, sizeof(class_offsets_offset_))) {
PLOG(ERROR) << "Failed to write class offsets offset to " << out->GetLocation();
return false;
}
oat_writer->size_oat_dex_file_class_offsets_offset_ += sizeof(class_offsets_offset_);
if (!oat_writer->WriteData(out, &lookup_table_offset_, sizeof(lookup_table_offset_))) {
PLOG(ERROR) << "Failed to write lookup table offset to " << out->GetLocation();
return false;
}
oat_writer->size_oat_dex_file_lookup_table_offset_ += sizeof(lookup_table_offset_);
return true;
}
bool OatWriter::OatDexFile::WriteClassOffsets(OatWriter* oat_writer, OutputStream* out) {
if (!oat_writer->WriteData(out, class_offsets_.data(), GetClassOffsetsRawSize())) {
PLOG(ERROR) << "Failed to write oat class offsets for " << GetLocation()
<< " to " << out->GetLocation();
return false;
}
oat_writer->size_oat_class_offsets_ += GetClassOffsetsRawSize();
return true;
}
OatWriter::OatClass::OatClass(size_t offset,
const dchecked_vector<CompiledMethod*>& compiled_methods,
uint32_t num_non_null_compiled_methods,
mirror::Class::Status status)
: compiled_methods_(compiled_methods) {
uint32_t num_methods = compiled_methods.size();
CHECK_LE(num_non_null_compiled_methods, num_methods);
offset_ = offset;
oat_method_offsets_offsets_from_oat_class_.resize(num_methods);
// Since both kOatClassNoneCompiled and kOatClassAllCompiled could
// apply when there are 0 methods, we just arbitrarily say that 0
// methods means kOatClassNoneCompiled and that we won't use
// kOatClassAllCompiled unless there is at least one compiled
// method. This means in an interpretter only system, we can assert
// that all classes are kOatClassNoneCompiled.
if (num_non_null_compiled_methods == 0) {
type_ = kOatClassNoneCompiled;
} else if (num_non_null_compiled_methods == num_methods) {
type_ = kOatClassAllCompiled;
} else {
type_ = kOatClassSomeCompiled;
}
status_ = status;
method_offsets_.resize(num_non_null_compiled_methods);
method_headers_.resize(num_non_null_compiled_methods);