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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-inl.h"
#include "base/enums.h"
#include "base/file_magic.h"
#include "base/stl_util.h"
#include "base/unix_file/fd_file.h"
#include "class_linker.h"
#include "compiled_method.h"
#include "debug/method_debug_info.h"
#include "dex/verification_results.h"
#include "dex_file-inl.h"
#include "dexlayout.h"
#include "driver/compiler_driver-inl.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/buffered_output_stream.h"
#include "linker/file_output_stream.h"
#include "linker/method_bss_mapping_encoder.h"
#include "linker/multi_oat_relative_patcher.h"
#include "linker/output_stream.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-inl.h"
#include "type_lookup_table.h"
#include "utils/dex_cache_arrays_layout-inl.h"
#include "vdex_file.h"
#include "verifier/verifier_deps.h"
#include "zip_archive.h"
namespace art {
namespace { // anonymous namespace
// If we write dex layout info in the oat file.
static constexpr bool kWriteDexLayoutInfo = true;
typedef DexFile::Header __attribute__((aligned(1))) UnalignedDexFileHeader;
const UnalignedDexFileHeader* AsUnalignedDexFileHeader(const uint8_t* raw_data) {
return reinterpret_cast<const UnalignedDexFileHeader*>(raw_data);
}
class ChecksumUpdatingOutputStream : public OutputStream {
public:
ChecksumUpdatingOutputStream(OutputStream* out, OatHeader* oat_header)
: OutputStream(out->GetLocation()), out_(out), oat_header_(oat_header) { }
bool WriteFully(const void* buffer, size_t byte_count) OVERRIDE {
oat_header_->UpdateChecksum(buffer, byte_count);
return out_->WriteFully(buffer, byte_count);
}
off_t Seek(off_t offset, Whence whence) OVERRIDE {
return out_->Seek(offset, whence);
}
bool Flush() OVERRIDE {
return out_->Flush();
}
private:
OutputStream* const out_;
OatHeader* const oat_header_;
};
inline uint32_t CodeAlignmentSize(uint32_t header_offset, const CompiledMethod& compiled_method) {
// We want to align the code rather than the preheader.
uint32_t unaligned_code_offset = header_offset + sizeof(OatQuickMethodHeader);
uint32_t aligned_code_offset = compiled_method.AlignCode(unaligned_code_offset);
return aligned_code_offset - unaligned_code_offset;
}
} // anonymous namespace
// Defines the location of the raw dex file to write.
class OatWriter::DexFileSource {
public:
enum Type {
kNone,
kZipEntry,
kRawFile,
kRawData,
};
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);
}
Type GetType() const { return type_; }
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:
Type type_;
const void* source_;
};
// OatClassHeader is the header only part of the oat class that is required even when compilation
// is not enabled.
class OatWriter::OatClassHeader {
public:
OatClassHeader(uint32_t offset,
uint32_t num_non_null_compiled_methods,
uint32_t num_methods,
mirror::Class::Status status)
: status_(status),
offset_(offset) {
// 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
// interpreter 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;
}
}
bool Write(OatWriter* oat_writer, OutputStream* out, const size_t file_offset) const;
static size_t SizeOf() {
return sizeof(status_) + sizeof(type_);
}
// 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_;
// Offset of start of OatClass from beginning of OatHeader. It is
// used to validate file position when writing.
uint32_t offset_;
};
// The actual oat class body contains the information about compiled methods. It is only required
// for compiler filters that have any compilation.
class OatWriter::OatClass {
public:
OatClass(const dchecked_vector<CompiledMethod*>& compiled_methods,
uint32_t compiled_methods_with_code,
uint16_t oat_class_type);
OatClass(OatClass&& src) = default;
size_t SizeOf() const;
bool Write(OatWriter* oat_writer, OutputStream* out) const;
CompiledMethod* GetCompiledMethod(size_t class_def_method_index) const {
return compiled_methods_[class_def_method_index];
}
// 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.
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_;
}
size_t SizeOf() const;
bool Write(OatWriter* oat_writer, OutputStream* out) const;
bool WriteClassOffsets(OatWriter* oat_writer, OutputStream* out);
size_t GetClassOffsetsRawSize() const {
return class_offsets_.size() * sizeof(class_offsets_[0]);
}
// 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_;
uint32_t method_bss_mapping_offset_;
uint32_t dex_sections_layout_offset_;
// Data to write to a separate section.
dchecked_vector<uint32_t> class_offsets_;
// Dex section layout info to serialize.
DexLayoutSections dex_sections_layout_;
private:
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, ProfileCompilationInfo* info)
: 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),
vdex_size_(0u),
vdex_dex_files_offset_(0u),
vdex_verifier_deps_offset_(0u),
vdex_quickening_info_offset_(0u),
oat_size_(0u),
bss_start_(0u),
bss_size_(0u),
bss_methods_offset_(0u),
bss_roots_offset_(0u),
bss_method_entry_references_(),
bss_method_entries_(),
bss_type_entries_(),
bss_string_entries_(),
oat_data_offset_(0u),
oat_header_(nullptr),
size_vdex_header_(0),
size_vdex_checksums_(0),
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_verifier_deps_(0),
size_verifier_deps_alignment_(0),
size_quickening_info_(0),
size_quickening_info_alignment_(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_vmap_table_(0),
size_method_info_(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_dex_file_dex_layout_sections_offset_(0),
size_oat_dex_file_dex_layout_sections_(0),
size_oat_dex_file_dex_layout_sections_alignment_(0),
size_oat_dex_file_method_bss_mapping_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),
size_method_bss_mappings_(0u),
relative_patcher_(nullptr),
absolute_patch_locations_(),
profile_compilation_info_(info) {
}
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;
File fd = OpenAndReadMagic(filename, &magic, &error_msg);
if (fd.Fd() == -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(File&& 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(s) from a vdex file specified by a file handle.
bool OatWriter::AddVdexDexFilesSource(const VdexFile& vdex_file,
const char* location,
CreateTypeLookupTable create_type_lookup_table) {
DCHECK(write_state_ == WriteState::kAddingDexFileSources);
const uint8_t* current_dex_data = nullptr;
for (size_t i = 0; i < vdex_file.GetHeader().GetNumberOfDexFiles(); ++i) {
current_dex_data = vdex_file.GetNextDexFileData(current_dex_data);
if (current_dex_data == nullptr) {
LOG(ERROR) << "Unexpected number of dex files in vdex " << location;
return false;
}
if (!DexFile::IsMagicValid(current_dex_data)) {
LOG(ERROR) << "Invalid magic in vdex file created from " << location;
return false;
}
// We used `zipped_dex_file_locations_` to keep the strings in memory.
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(current_dex_data),
create_type_lookup_table);
oat_dex_files_.back().dex_file_location_checksum_ = vdex_file.GetLocationChecksum(i);
}
if (vdex_file.GetNextDexFileData(current_dex_data) != nullptr) {
LOG(ERROR) << "Unexpected number of dex files in vdex " << location;
return false;
}
if (oat_dex_files_.empty()) {
LOG(ERROR) << "No dex files in vdex file created from " << location;
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<std::string> OatWriter::GetSourceLocations() const {
dchecked_vector<std::string> 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::MayHaveCompiledMethods() const {
return CompilerFilter::IsAnyCompilationEnabled(
GetCompilerDriver()->GetCompilerOptions().GetCompilerFilter());
}
bool OatWriter::WriteAndOpenDexFiles(
File* vdex_file,
OutputStream* oat_rodata,
InstructionSet instruction_set,
const InstructionSetFeatures* instruction_set_features,
SafeMap<std::string, std::string>* key_value_store,
bool verify,
bool update_input_vdex,
/*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);
// Record the ELF rodata section offset, i.e. the beginning of the OAT data.
if (!RecordOatDataOffset(oat_rodata)) {
return false;
}
std::unique_ptr<MemMap> dex_files_map;
std::vector<std::unique_ptr<const DexFile>> dex_files;
// Initialize VDEX and OAT headers.
if (kIsVdexEnabled) {
// Reserve space for Vdex header and checksums.
vdex_size_ = sizeof(VdexFile::Header) + oat_dex_files_.size() * sizeof(VdexFile::VdexChecksum);
}
oat_size_ = InitOatHeader(instruction_set,
instruction_set_features,
dchecked_integral_cast<uint32_t>(oat_dex_files_.size()),
key_value_store);
ChecksumUpdatingOutputStream checksum_updating_rodata(oat_rodata, oat_header_.get());
if (kIsVdexEnabled) {
std::unique_ptr<BufferedOutputStream> vdex_out =
std::make_unique<BufferedOutputStream>(std::make_unique<FileOutputStream>(vdex_file));
// Write DEX files into VDEX, mmap and open them.
if (!WriteDexFiles(vdex_out.get(), vdex_file, update_input_vdex) ||
!OpenDexFiles(vdex_file, verify, &dex_files_map, &dex_files)) {
return false;
}
} else {
DCHECK(!update_input_vdex);
// Write DEX files into OAT, mmap and open them.
if (!WriteDexFiles(oat_rodata, vdex_file, update_input_vdex) ||
!OpenDexFiles(vdex_file, verify, &dex_files_map, &dex_files)) {
return false;
}
// Do a bulk checksum update for Dex[]. Doing it piece by piece would be
// difficult because we're not using the OutputStream directly.
if (!oat_dex_files_.empty()) {
size_t size = oat_size_ - oat_dex_files_[0].dex_file_offset_;
oat_header_->UpdateChecksum(dex_files_map->Begin(), size);
}
}
// Write type lookup tables into the oat file.
if (!WriteTypeLookupTables(&checksum_updating_rodata, dex_files)) {
return false;
}
// Write dex layout sections into the oat file.
if (!WriteDexLayoutSections(&checksum_updating_rodata, 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(linker::MultiOatRelativePatcher* relative_patcher) {
CHECK(write_state_ == WriteState::kPrepareLayout);
relative_patcher_ = relative_patcher;
SetMultiOatRelativePatcherAdjustment();
if (compiling_boot_image_) {
CHECK(image_writer_ != nullptr);
}
InstructionSet instruction_set = compiler_driver_->GetInstructionSet();
CHECK_EQ(instruction_set, oat_header_->GetInstructionSet());
{
TimingLogger::ScopedTiming split("InitBssLayout", timings_);
InitBssLayout(instruction_set);
}
uint32_t offset = oat_size_;
{
TimingLogger::ScopedTiming split("InitClassOffsets", timings_);
offset = InitClassOffsets(offset);
}
{
TimingLogger::ScopedTiming split("InitOatClasses", timings_);
offset = InitOatClasses(offset);
}
{
TimingLogger::ScopedTiming split("InitMethodBssMappings", timings_);
offset = InitMethodBssMappings(offset);
}
{
TimingLogger::ScopedTiming split("InitOatMaps", timings_);
offset = InitOatMaps(offset);
}
{
TimingLogger::ScopedTiming split("InitOatDexFiles", timings_);
oat_header_->SetOatDexFilesOffset(offset);
offset = InitOatDexFiles(offset);
}
{
TimingLogger::ScopedTiming split("InitOatCode", timings_);
offset = InitOatCode(offset);
}
{
TimingLogger::ScopedTiming split("InitOatCodeDexFiles", timings_);
offset = InitOatCodeDexFiles(offset);
}
oat_size_ = offset;
bss_start_ = (bss_size_ != 0u) ? RoundUp(oat_size_, kPageSize) : 0u;
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() {
}
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) OVERRIDE {
DexMethodVisitor::StartClass(dex_file, class_def_index);
if (kIsDebugBuild && writer_->MayHaveCompiledMethods()) {
// There are no oat classes if there aren't any compiled methods.
CHECK_LT(oat_class_index_, writer_->oat_classes_.size());
}
method_offsets_index_ = 0u;
return true;
}
bool EndClass() OVERRIDE {
++oat_class_index_;
return DexMethodVisitor::EndClass();
}
protected:
size_t oat_class_index_;
size_t method_offsets_index_;
};
static bool HasCompiledCode(const CompiledMethod* method) {
// The dextodexcompiler puts the quickening info table into the CompiledMethod
// for simplicity. For such methods, we will emit an OatQuickMethodHeader
// only when vdex is disabled.
return method != nullptr && (!method->GetQuickCode().empty() || !kIsVdexEnabled);
}
static bool HasQuickeningInfo(const CompiledMethod* method) {
return method != nullptr && method->GetQuickCode().empty() && !method->GetVmapTable().empty();
}
class OatWriter::InitBssLayoutMethodVisitor : public DexMethodVisitor {
public:
explicit InitBssLayoutMethodVisitor(OatWriter* writer)
: DexMethodVisitor(writer, /* offset */ 0u) {}
bool VisitMethod(size_t class_def_method_index ATTRIBUTE_UNUSED,
const ClassDataItemIterator& it) OVERRIDE {
// Look for patches with .bss references and prepare maps with placeholders for their offsets.
CompiledMethod* compiled_method = writer_->compiler_driver_->GetCompiledMethod(
MethodReference(dex_file_, it.GetMemberIndex()));
if (HasCompiledCode(compiled_method)) {
for (const LinkerPatch& patch : compiled_method->GetPatches()) {
if (patch.GetType() == LinkerPatch::Type::kMethodBssEntry) {
MethodReference target_method = patch.TargetMethod();
auto refs_it = writer_->bss_method_entry_references_.find(target_method.dex_file);
if (refs_it == writer_->bss_method_entry_references_.end()) {
refs_it = writer_->bss_method_entry_references_.Put(
target_method.dex_file,
BitVector(target_method.dex_file->NumMethodIds(),
/* expandable */ false,
Allocator::GetMallocAllocator()));
refs_it->second.ClearAllBits();
}
refs_it->second.SetBit(target_method.dex_method_index);
writer_->bss_method_entries_.Overwrite(target_method, /* placeholder */ 0u);
} else if (patch.GetType() == LinkerPatch::Type::kTypeBssEntry) {
TypeReference ref(patch.TargetTypeDexFile(), patch.TargetTypeIndex());
writer_->bss_type_entries_.Overwrite(ref, /* placeholder */ 0u);
} else if (patch.GetType() == LinkerPatch::Type::kStringBssEntry) {
StringReference ref(patch.TargetStringDexFile(), patch.TargetStringIndex());
writer_->bss_string_entries_.Overwrite(ref, /* placeholder */ 0u);
}
}
} else {
DCHECK(compiled_method == nullptr || compiled_method->GetPatches().empty());
}
return true;
}
};
class OatWriter::InitOatClassesMethodVisitor : public DexMethodVisitor {
public:
InitOatClassesMethodVisitor(OatWriter* writer, size_t offset)
: DexMethodVisitor(writer, offset),
compiled_methods_(),
compiled_methods_with_code_(0u) {
size_t num_classes = 0u;
for (const OatDexFile& oat_dex_file : writer_->oat_dex_files_) {
num_classes += oat_dex_file.class_offsets_.size();
}
// If we aren't compiling only reserve headers.
writer_->oat_class_headers_.reserve(num_classes);
if (writer->MayHaveCompiledMethods()) {
writer->oat_classes_.reserve(num_classes);
}
compiled_methods_.reserve(256u);
// If there are any classes, the class offsets allocation aligns the offset.
DCHECK(num_classes == 0u || IsAligned<4u>(offset));
}
bool StartClass(const DexFile* dex_file, size_t class_def_index) OVERRIDE {
DexMethodVisitor::StartClass(dex_file, class_def_index);
compiled_methods_.clear();
compiled_methods_with_code_ = 0u;
return true;
}
bool VisitMethod(size_t class_def_method_index ATTRIBUTE_UNUSED,
const ClassDataItemIterator& it) OVERRIDE {
// Fill in the compiled_methods_ array for methods that have a
// CompiledMethod. We track the number of non-null entries in
// compiled_methods_with_code_ 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 (HasCompiledCode(compiled_method)) {
++compiled_methods_with_code_;
}
return true;
}
bool EndClass() OVERRIDE {
ClassReference class_ref(dex_file_, class_def_index_);
mirror::Class::Status status;
bool found = writer_->compiler_driver_->GetCompiledClass(class_ref, &status);
if (!found) {
VerificationResults* results = writer_->compiler_driver_->GetVerificationResults();
if (results != nullptr && results->IsClassRejected(class_ref)) {
// The oat class status is used only for verification of resolved classes,
// so use kStatusErrorResolved whether the class was resolved or unresolved
// during compile-time verification.
status = mirror::Class::kStatusErrorResolved;
} else {
status = mirror::Class::kStatusNotReady;
}
}
writer_->oat_class_headers_.emplace_back(offset_,
compiled_methods_with_code_,
compiled_methods_.size(),
status);
OatClassHeader& header = writer_->oat_class_headers_.back();
offset_ += header.SizeOf();
if (writer_->MayHaveCompiledMethods()) {
writer_->oat_classes_.emplace_back(compiled_methods_,
compiled_methods_with_code_,
header.type_);
offset_ += writer_->oat_classes_.back().SizeOf();
}
return DexMethodVisitor::EndClass();
}
private:
dchecked_vector<CompiledMethod*> compiled_methods_;
size_t compiled_methods_with_code_;
};
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() OVERRIDE {
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) OVERRIDE
REQUIRES_SHARED(Locks::mutator_lock_) {
OatClass* oat_class = &writer_->oat_classes_[oat_class_index_];
CompiledMethod* compiled_method = oat_class->GetCompiledMethod(class_def_method_index);
if (HasCompiledCode(compiled_method)) {
// 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 = true;
MethodReference method_ref(dex_file_, it.GetMemberIndex());
if (debuggable_) {
quick_code_offset = writer_->relative_patcher_->GetOffset(method_ref);
if (quick_code_offset != 0u) {
// 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.
} else {
quick_code_offset = NewQuickCodeOffset(compiled_method, it, thumb_offset);
deduped = false;
}
} else {
quick_code_offset = dedupe_map_.GetOrCreate(
compiled_method,
[this, &deduped, compiled_method, &it, thumb_offset]() {
deduped = false;
return NewQuickCodeOffset(compiled_method, it, thumb_offset);
});
}
if (code_size != 0) {
if (writer_->relative_patcher_->GetOffset(method_ref) != 0u) {
// TODO: Should this be a hard failure?
LOG(WARNING) << "Multiple definitions of "
<< method_ref.dex_file->PrettyMethod(method_ref.dex_method_index)
<< " offsets " << writer_->relative_patcher_->GetOffset(method_ref)
<< " " << quick_code_offset;
} else {
writer_->relative_patcher_->SetOffset(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 vmap_table_offset = method_header->GetVmapTableOffset();
uint32_t method_info_offset = method_header->GetMethodInfoOffset();
// 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 (!compiled_method->GetQuickCode().empty()) {
// If the code is compiled, we write the offset of the stack map relative
// to the code,
if (vmap_table_offset != 0u) {
vmap_table_offset += code_offset;
DCHECK_LT(vmap_table_offset, code_offset);
}
if (method_info_offset != 0u) {
method_info_offset += code_offset;
DCHECK_LT(method_info_offset, code_offset);
}
} else {
CHECK(!kIsVdexEnabled);
// We write the offset of the quickening info relative to the code.
vmap_table_offset += code_offset;
DCHECK_LT(vmap_table_offset, code_offset);
}
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(vmap_table_offset,
method_info_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());
}
}
}
}
const CompilerOptions& compiler_options = writer_->compiler_driver_->GetCompilerOptions();
// Exclude quickened dex methods (code_size == 0) since they have no native code.
if (compiler_options.GenerateAnyDebugInfo() && code_size != 0) {
bool has_code_info = method_header->IsOptimized();
// Record debug information for this function if we are doing that.
debug::MethodDebugInfo info = debug::MethodDebugInfo();
info.trampoline_name = nullptr;
info.dex_file = dex_file_;
info.class_def_index = class_def_index_;
info.dex_method_index = it.GetMemberIndex();
info.access_flags = it.GetMethodAccessFlags();
info.code_item = it.GetMethodCodeItem();
info.isa = compiled_method->GetInstructionSet();
info.deduped = deduped;
info.is_native_debuggable = compiler_options.GetNativeDebuggable();
info.is_optimized = method_header->IsOptimized();
info.is_code_address_text_relative = true;
info.code_address = code_offset - writer_->oat_header_->GetExecutableOffset();
info.code_size = code_size;
info.frame_size_in_bytes = compiled_method->GetFrameSizeInBytes();
info.code_info = has_code_info ? compiled_method->GetVmapTable().data() : nullptr;
info.cfi = compiled_method->GetCFIInfo();
writer_->method_info_.push_back(info);
}
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->GetVmapTable().data() != rhs->GetVmapTable().data())) {
return lhs->GetVmapTable().data() < rhs->GetVmapTable().data();
}
if (UNLIKELY(lhs->GetMethodInfo().data() != rhs->GetMethodInfo().data())) {
return lhs->GetMethodInfo().data() < rhs->GetMethodInfo().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_ += CodeAlignmentSize(offset_, *compiled_method);
DCHECK_ALIGNED_PARAM(offset_ + sizeof(OatQuickMethodHeader),
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_;
};
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)
OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
OatClass* oat_class = &writer_->oat_classes_[oat_class_index_];
CompiledMethod* compiled_method = oat_class->GetCompiledMethod(class_def_method_index);
if (HasCompiledCode(compiled_method)) {
DCHECK_LT(method_offsets_index_, oat_class->method_offsets_.size());
DCHECK_EQ(oat_class->method_headers_[method_offsets_index_].GetVmapTableOffset(), 0u);
ArrayRef<const uint8_t> map = compiled_method->GetVmapTable();
uint32_t map_size = map.size() * sizeof(map[0]);
if (map_size != 0u) {
size_t offset = dedupe_map_.GetOrCreate(
map.data(),
[this, map_size]() {
uint32_t new_offset = offset_;
offset_ += map_size;
return new_offset;
});
// Code offset is not initialized yet, so set the map offset to 0u-offset.
DCHECK_EQ(oat_class->method_offsets_[method_offsets_index_].code_offset_, 0u);
oat_class->method_headers_[method_offsets_index_].SetVmapTableOffset(0u - offset);
}
++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::InitMethodInfoVisitor : public OatDexMethodVisitor {
public:
InitMethodInfoVisitor(OatWriter* writer, size_t offset) : OatDexMethodVisitor(writer, offset) {}
bool VisitMethod(size_t class_def_method_index, const ClassDataItemIterator& it ATTRIBUTE_UNUSED)
OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
OatClass* oat_class = &writer_->oat_classes_[oat_class_index_];
CompiledMethod* compiled_method = oat_class->GetCompiledMethod(class_def_method_index);
if (HasCompiledCode(compiled_method)) {
DCHECK_LT(method_offsets_index_, oat_class->method_offsets_.size());
DCHECK_EQ(oat_class->method_headers_[method_offsets_index_].GetMethodInfoOffset(), 0u);
ArrayRef<const uint8_t> map = compiled_method->GetMethodInfo();
const uint32_t map_size = map.size() * sizeof(map[0]);
if (map_size != 0u) {
size_t offset = dedupe_map_.GetOrCreate(
map.data(),
[this, map_size]() {
uint32_t new_offset = offset_;
offset_ += map_size;
return new_offset;
});
// Code offset is not initialized yet, so set the map offset to 0u-offset.
DCHECK_EQ(oat_class->method_offsets_[method_offsets_index_].code_offset_, 0u);
oat_class->method_headers_[method_offsets_index_].SetMethodInfoOffset(0u - offset);
}
++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,
const std::vector<const DexFile*>* dex_files)
: OatDexMethodVisitor(writer, offset),
pointer_size_(GetInstructionSetPointerSize(writer_->compiler_driver_->GetInstructionSet())),
class_loader_(writer->HasImage() ? writer->image_writer_->GetClassLoader() : nullptr),
dex_files_(dex_files),
class_linker_(Runtime::Current()->GetClassLinker()) {}
// Handle copied methods here. Copy pointer to quick code from
// an origin method to a copied method only if they are
// in the same oat file. If the origin and the copied methods are
// in different oat files don't touch the copied method.
// References to other oat files are not supported yet.
bool StartClass(const DexFile* dex_file, size_t class_def_index) OVERRIDE
REQUIRES_SHARED(Locks::mutator_lock_) {
OatDexMethodVisitor::StartClass(dex_file, class_def_index);
// Skip classes that are not in the image.
if (!IsImageClass()) {
return true;
}
ObjPtr<mirror::DexCache> dex_cache = class_linker_->FindDexCache(Thread::Current(), *dex_file);
const DexFile::ClassDef& class_def = dex_file->GetClassDef(class_def_index);
mirror::Class* klass = dex_cache->GetResolvedType(class_def.class_idx_);
if (klass != nullptr) {
for (ArtMethod& method : klass->GetCopiedMethods(pointer_size_)) {
// Find origin method. Declaring class and dex_method_idx
// in the copied method should be the same as in the origin
// method.
mirror::Class* declaring_class = method.GetDeclaringClass();
ArtMethod* origin = declaring_class->FindClassMethod(
declaring_class->GetDexCache(),
method.GetDexMethodIndex(),
pointer_size_);
CHECK(origin != nullptr);
CHECK(!origin->IsDirect());
CHECK(origin->GetDeclaringClass() == declaring_class);
if (IsInOatFile(&declaring_class->GetDexFile())) {
const void* code_ptr =
origin->GetEntryPointFromQuickCompiledCodePtrSize(pointer_size_);
if (code_ptr == nullptr) {
methods_to_process_.push_back(std::make_pair(&method, origin));
} else {
method.SetEntryPointFromQuickCompiledCodePtrSize(
code_ptr, pointer_size_);
}
}
}
}
return true;
}
bool VisitMethod(size_t class_def_method_index, const ClassDataItemIterator& it) OVERRIDE
REQUIRES_SHARED(Locks::mutator_lock_) {
// Skip methods that are not in the image.
if (!IsImageClass()) {
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 (HasCompiledCode(compiled_method)) {
DCHECK_LT(method_offsets_index_, oat_class->method_offsets_.size());
offsets = oat_class->method_offsets_[method_offsets_index_];
++method_offsets_index_;
}
Thread* self = Thread::Current();
ObjPtr<mirror::DexCache> dex_cache = class_linker_->FindDexCache(self, *dex_file_);
ArtMethod* method;
if (writer_->HasBootImage()) {
const InvokeType invoke_type = it.GetMethodInvokeType(
dex_file_->GetClassDef(class_def_index_));
// Unchecked as we hold mutator_lock_ on entry.
ScopedObjectAccessUnchecked soa(self);
StackHandleScope<1> hs(self);
method = class_linker_->ResolveMethod<ClassLinker::ResolveMode::kNoChecks>(
*dex_file_,
it.GetMemberIndex(),
hs.NewHandle(dex_cache),
ScopedNullHandle<mirror::ClassLoader>(),
nullptr,
invoke_type);
if (method == nullptr) {
LOG(FATAL_WITHOUT_ABORT) << "Unexpected failure to resolve a method: "
<< dex_file_->PrettyMethod(it.GetMemberIndex(), true);
self->AssertPendingException();
mirror::Throwable* exc = self->GetException();
std::string dump = exc->Dump();
LOG(FATAL) << dump;
UNREACHABLE();
}
} else {
// Should already have been resolved by the compiler.
// It may not be resolved if the class failed to verify, in this case, don't set the
// entrypoint. This is not fatal since we shall use a resolution method.
method = class_linker_->LookupResolvedMethod(it.GetMemberIndex(), dex_cache, class_loader_);
}
if (method != nullptr &&
compiled_method != nullptr &&
compiled_method->GetQuickCode().size() != 0) {
method->SetEntryPointFromQuickCompiledCodePtrSize(
reinterpret_cast<void*>(offsets.code_offset_), pointer_size_);
}
return true;
}
// Check whether current class is image class
bool IsImageClass() {
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);
return writer_->GetCompilerDriver()->IsImageClass(class_descriptor);
}
// Check whether specified dex file is in the compiled oat file.
bool IsInOatFile(const DexFile* dex_file) {
return ContainsElement(*dex_files_, dex_file);
}
// Assign a pointer to quick code for copied methods
// not handled in the method StartClass
void Postprocess() {
for (std::pair<ArtMethod*, ArtMethod*>& p : methods_to_process_) {
ArtMethod* method = p.first;
ArtMethod* origin = p.second;
const void* code_ptr =
origin->GetEntryPointFromQuickCompiledCodePtrSize(pointer_size_);
if (code_ptr != nullptr) {
method->SetEntryPointFromQuickCompiledCodePtrSize(code_ptr, pointer_size_);
}
}
}
private:
const PointerSize pointer_size_;
ObjPtr<mirror::ClassLoader> class_loader_;
const std::vector<const DexFile*>* dex_files_;
ClassLinker* const class_linker_;
std::vector<std::pair<ArtMethod*, ArtMethod*>> methods_to_process_;
};
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),
pointer_size_(GetInstructionSetPointerSize(writer_->compiler_driver_->GetInstructionSet())),
class_loader_(writer->HasImage() ? writer->image_writer_->GetClassLoader() : nullptr),
out_(out),
file_offset_(file_offset),
soa_(Thread::Current()),
no_thread_suspension_("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) OVERRIDE
REQUIRES_SHARED(Locks::mutator_lock_) {
OatDexMethodVisitor::StartClass(dex_file, class_def_index);
if (writer_->GetCompilerDriver()->GetCompilerOptions().IsAotCompilationEnabled()) {
// Only need to set the dex cache if we have compilation. Other modes might have unloaded it.
if (dex_cache_ == nullptr || dex_cache_->GetDexFile() != dex_file) {
dex_cache_ = class_linker_->FindDexCache(Thread::Current(), *dex_file);
DCHECK(dex_cache_ != nullptr);
}
}
return true;
}
bool EndClass() OVERRIDE REQUIRES_SHARED(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) OVERRIDE
REQUIRES_SHARED(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(__FUNCTION__);
if (HasCompiledCode(compiled_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 alignment_size = CodeAlignmentSize(offset_, *compiled_method);
if (alignment_size != 0) {
if (!writer_->WriteCodeAlignment(out, alignment_size)) {
ReportWriteFailure("code alignment padding", it);
return false;
}
offset_ += alignment_size;
DCHECK_OFFSET_();
}
DCHECK_ALIGNED_PARAM(offset_ + sizeof(OatQuickMethodHeader),
GetInstructionSetAlignment(compiled_method->GetInstructionSet()));
DCHECK_EQ(method_offsets.code_offset_,
offset_ + sizeof(OatQuickMethodHeader) + compiled_method->CodeDelta())
<< dex_file_->PrettyMethod(it.GetMemberIndex());
const OatQuickMethodHeader& method_header =
oat_class->method_headers_[method_offsets_index_];
if (!out->WriteFully(&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()) {
uint32_t literal_offset = patch.LiteralOffset();
switch (patch.GetType()) {
case LinkerPatch::Type::kMethodBssEntry: {
uint32_t target_offset =
writer_->bss_start_ + writer_->bss_method_entries_.Get(patch.TargetMethod());
writer_->relative_patcher_->PatchPcRelativeReference(&patched_code_,
patch,
offset_ + literal_offset,
target_offset);
break;
}
case LinkerPatch::Type::kCallRelative: {
// NOTE: Relative calls across oat files are not supported.
uint32_t target_offset = GetTargetOffset(patch);
writer_->relative_patcher_->PatchCall(&patched_code_,
literal_offset,
offset_ + literal_offset,
target_offset);
break;
}
case LinkerPatch::Type::kStringRelative: {
uint32_t target_offset = GetTargetObjectOffset(GetTargetString(patch));
writer_->relative_patcher_->PatchPcRelativeReference(&patched_code_,
patch,
offset_ + literal_offset,
target_offset);
break;
}
case LinkerPatch::Type::kStringBssEntry: {
StringReference ref(patch.TargetStringDexFile(), patch.TargetStringIndex());
uint32_t target_offset =
writer_->bss_start_ + writer_->bss_string_entries_.Get(ref);
writer_->relative_patcher_->PatchPcRelativeReference(&patched_code_,
patch,
offset_ + literal_offset,
target_offset);
break;
}
case LinkerPatch::Type::kTypeRelative: {
uint32_t target_offset = GetTargetObjectOffset(GetTargetType(patch));
writer_->relative_patcher_->PatchPcRelativeReference(&patched_code_,
patch,
offset_ + literal_offset,
target_offset);
break;
}
case LinkerPatch::Type::kTypeBssEntry: {
TypeReference ref(patch.TargetTypeDexFile(), patch.TargetTypeIndex());
uint32_t target_offset = writer_->bss_start_ + writer_->bss_type_entries_.Get(ref);
writer_->relative_patcher_->PatchPcRelativeReference(&patched_code_,
patch,
offset_ + literal_offset,
target_offset);
break;
}
case LinkerPatch::Type::kCall: {
uint32_t target_offset = GetTargetOffset(patch);
PatchCodeAddress(&patched_code_, literal_offset, target_offset);
break;
}
case LinkerPatch::Type::kMethodRelative: {
uint32_t target_offset = GetTargetMethodOffset(GetTargetMethod(patch));
writer_->relative_patcher_->PatchPcRelativeReference(&patched_code_,
patch,
offset_ + literal_offset,
target_offset);
break;
}
case LinkerPatch::Type::kBakerReadBarrierBranch: {
writer_->relative_patcher_->PatchBakerReadBarrierBranch(&patched_code_,
patch,
offset_ + literal_offset);
break;
}
default: {
DCHECK(false) << "Unexpected linker patch type: " << patch.GetType();
break;
}
}
}
}
if (!out->WriteFully(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:
const PointerSize pointer_size_;
ObjPtr<mirror::ClassLoader> class_loader_;
OutputStream* const out_;
const size_t file_offset_;
const ScopedObjectAccess soa_;
const ScopedAssertNoThreadSuspension no_thread_suspension_;
ClassLinker* const class_linker_;
ObjPtr<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 "
<< dex_file_->PrettyMethod(it.GetMemberIndex()) << " to " << out_->GetLocation();
}
ArtMethod* GetTargetMethod(const LinkerPatch& patch)
REQUIRES_SHARED(Locks::mutator_lock_) {
MethodReference ref = patch.TargetMethod();
ObjPtr<mirror::DexCache> dex_cache =
(dex_file_ == ref.dex_file) ? dex_cache_ : class_linker_->FindDexCache(
Thread::Current(), *ref.dex_file);
ArtMethod* method =
class_linker_->LookupResolvedMethod(ref.dex_method_index, dex_cache, class_loader_);
CHECK(method != nullptr);
return method;
}
uint32_t GetTargetOffset(const LinkerPatch& patch) REQUIRES_SHARED(Locks::mutator_lock_) {
uint32_t target_offset = writer_->relative_patcher_->GetOffset(patch.TargetMethod());
// If there's no new compiled code, either we're compiling an app and the target method
// is in the boot image, or we need to point to the correct trampoline.
if (UNLIKELY(target_offset == 0)) {
ArtMethod* target = GetTargetMethod(patch);
DCHECK(target != nullptr);
const void* oat_code_offset =
target->GetEntryPointFromQuickCompiledCodePtrSize(pointer_size_);
if (oat_code_offset != 0) {
DCHECK(!writer_->HasBootImage());
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;
}
ObjPtr<mirror::DexCache> GetDexCache(const DexFile* target_dex_file)
REQUIRES_SHARED(Locks::mutator_lock_) {
return (target_dex_file == dex_file_)
? dex_cache_
: class_linker_->FindDexCache(Thread::Current(), *target_dex_file);
}
mirror::Class* GetTargetType(const LinkerPatch& patch) REQUIRES_SHARED(Locks::mutator_lock_) {
DCHECK(writer_->HasImage());
ObjPtr<mirror::DexCache> dex_cache = GetDexCache(patch.TargetTypeDexFile());
ObjPtr<mirror::Class> type =
ClassLinker::LookupResolvedType(patch.TargetTypeIndex(), dex_cache, class_loader_);
CHECK(type != nullptr);
return type.Ptr();
}
mirror::String* GetTargetString(const LinkerPatch& patch) REQUIRES_SHARED(Locks::mutator_lock_) {
ScopedObjectAccessUnchecked soa(Thread::Current());
ClassLinker* linker = Runtime::Current()->GetClassLinker();
mirror::String* string = linker->LookupString(*patch.TargetStringDexFile(),
patch.TargetStringIndex(),
GetDexCache(patch.TargetStringDexFile()));
DCHECK(string != nullptr);
DCHECK(writer_->HasBootImage() ||
Runtime::Current()->GetHeap()->ObjectIsInBootImageSpace(string));
return string;
}
uint32_t GetTargetMethodOffset(ArtMethod* method) REQUIRES_SHARED(Locks::mutator_lock_) {
DCHECK(writer_->HasBootImage());
method = writer_->image_writer_->GetImageMethodAddress(method);
size_t oat_index = writer_->image_writer_->GetOatIndexForDexFile(dex_file_);
uintptr_t oat_data_begin = writer_->image_writer_->GetOatDataBegin(oat_index);
// TODO: Clean up offset types. The target offset must be treated as signed.
return static_cast<uint32_t>(reinterpret_cast<uintptr_t>(method) - oat_data_begin);
}
uint32_t GetTargetObjectOffset(mirror::Object* object) REQUIRES_SHARED(Locks::mutator_lock_) {
DCHECK(writer_->HasBootImage());
object = writer_->image_writer_->GetImageAddress(object);
size_t oat_index = writer_->image_writer_->GetOatIndexForDexFile(dex_file_);
uintptr_t oat_data_begin = writer_->image_writer_->GetOatDataBegin(oat_index);
// TODO: Clean up offset types. The target offset must be treated as signed.
return static_cast<uint32_t>(reinterpret_cast<uintptr_t>(object) - oat_data_begin);
}
void PatchObjectAddress(std::vector<uint8_t>* code, uint32_t offset, mirror::Object* object)
REQUIRES_SHARED(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 PatchCodeAddress(std::vector<uint8_t>* code, uint32_t offset, uint32_t target_offset)
REQUIRES_SHARED(Locks::mutator_lock_) {
uint32_t address = target_offset;
if (writer_->HasBootImage()) {
size_t oat_index = writer_->image_writer_->GetOatIndexForDexCache(dex_cache_);
// TODO: Clean up offset types.
// The target_offset must be treated as signed for cross-oat patching.
const void* target = reinterpret_cast<const void*>(
writer_->image_writer_->GetOatDataBegin(oat_index) +
static_cast<int32_t>(target_offset));
address = PointerToLowMemUInt32(target);
}
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;
}
};
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) OVERRIDE {
OatClass* oat_class = &writer_->oat_classes_[oat_class_index_];
const CompiledMethod* compiled_method = oat_class->GetCompiledMethod(class_def_method_index);
if (HasCompiledCode(compiled_method)) {
size_t file_offset = file_offset_;
OutputStream* out = out_;
uint32_t map_offset = oat_class->method_headers_[method_offsets_index_].GetVmapTableOffset();
uint32_t code_offset = oat_class->method_offsets_[method_offsets_index_].code_offset_;
++method_offsets_index_;
DCHECK((compiled_method->GetVmapTable().size() == 0u && map_offset == 0u) ||
(compiled_method->GetVmapTable().size() != 0u && map_offset != 0u))
<< compiled_method->GetVmapTable().size() << " " << map_offset << " "
<< dex_file_->PrettyMethod(it.GetMemberIndex());
// If vdex is enabled, only emit the map for compiled code. The quickening info
// is emitted in the vdex already.
if (map_offset != 0u) {
// Transform map_offset to actual oat data offset.
map_offset = (code_offset - compiled_method->CodeDelta()) - map_offset;
DCHECK_NE(map_offset, 0u);
DCHECK_LE(map_offset, offset_) << dex_file_->PrettyMethod(it.GetMemberIndex());
ArrayRef<const uint8_t> map = compiled_method->GetVmapTable();
size_t map_size = map.size() * sizeof(map[0]);
if (map_offset == offset_) {
// Write deduplicated map (code info for Optimizing or transformation info for dex2dex).
if (UNLIKELY(!out->WriteFully(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 map for "
<< dex_file_->PrettyMethod(it.GetMemberIndex()) << " to " << out_->GetLocation();
}
};
class OatWriter::WriteMethodInfoVisitor : public OatDexMethodVisitor {
public:
WriteMethodInfoVisitor(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) OVERRIDE {
OatClass* oat_class = &writer_->oat_classes_[oat_class_index_];
const CompiledMethod* compiled_method = oat_class->GetCompiledMethod(class_def_method_index);
if (HasCompiledCode(compiled_method)) {
size_t file_offset = file_offset_;
OutputStream* out = out_;
uint32_t map_offset = oat_class->method_headers_[method_offsets_index_].GetMethodInfoOffset();
uint32_t code_offset = oat_class->method_offsets_[method_offsets_index_].code_offset_;
++method_offsets_index_;
DCHECK((compiled_method->GetMethodInfo().size() == 0u && map_offset == 0u) ||
(compiled_method->GetMethodInfo().size() != 0u && map_offset != 0u))
<< compiled_method->GetMethodInfo().size() << " " << map_offset << " "
<< dex_file_->PrettyMethod(it.GetMemberIndex());
if (map_offset != 0u) {
// Transform map_offset to actual oat data offset.
map_offset = (code_offset - compiled_method->CodeDelta()) - map_offset;
DCHECK_NE(map_offset, 0u);
DCHECK_LE(map_offset, offset_) << dex_file_->PrettyMethod(it.GetMemberIndex());
ArrayRef<const uint8_t> map = compiled_method->GetMethodInfo();
size_t map_size = map.size() * sizeof(map[0]);
if (map_offset == offset_) {
// Write deduplicated map (code info for Optimizing or transformation info for dex2dex).
if (UNLIKELY(!out->WriteFully(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 map for "
<< dex_file_->PrettyMethod(it.GetMemberIndex()) << " 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;
}
if (MayHaveCompiledMethods()) {
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);
it.SkipAllFields();
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::InitClassOffsets(size_t offset) {
// Reserve space for class offsets in OAT and update class_offsets_offset_.
for (OatDexFile& oat_dex_file : oat_dex_files_) {
DCHECK_EQ(oat_dex_file.class_offsets_offset_, 0u);
if (!oat_dex_file.class_offsets_.empty()) {
// Class offsets are required to be 4 byte aligned.
offset = RoundUp(offset, 4u);
oat_dex_file.class_offsets_offset_ = offset;
offset += oat_dex_file.GetClassOffsetsRawSize();
DCHECK_ALIGNED(offset, 4u);
}
}
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_class_headers_.begin();
for (OatDexFile& oat_dex_file : oat_dex_files_) {
for (uint32_t& class_offset : oat_dex_file.class_offsets_) {
DCHECK(oat_class_it != oat_class_headers_.end());
class_offset = oat_class_it->offset_;
++oat_class_it;
}
}
CHECK(oat_class_it == oat_class_headers_.end());
return offset;
}
size_t OatWriter::InitOatMaps(size_t offset) {
if (!MayHaveCompiledMethods()) {
return offset;
}
{
InitMapMethodVisitor visitor(this, offset);
bool success = VisitDexMethods(&visitor);
DCHECK(success);
offset = visitor.GetOffset();
}
{
InitMethodInfoVisitor visitor(this, offset);
bool success = VisitDexMethods(&visitor);
DCHECK(success);
offset = visitor.GetOffset();
}
return offset;
}
size_t OatWriter::InitMethodBssMappings(size_t offset) {
size_t number_of_dex_files = 0u;
for (size_t i = 0, size = dex_files_->size(); i != size; ++i) {
const DexFile* dex_file = (*dex_files_)[i];
auto it = bss_method_entry_references_.find(dex_file);
if (it != bss_method_entry_references_.end()) {
const BitVector& method_indexes = it->second;
++number_of_dex_files;
// If there are any classes, the class offsets allocation aligns the offset
// and we cannot have method bss mappings without class offsets.
static_assert(alignof(MethodBssMapping) == 4u, "MethodBssMapping alignment check.");
DCHECK_ALIGNED(offset, 4u);
oat_dex_files_[i].method_bss_mapping_offset_ = offset;
linker::MethodBssMappingEncoder encoder(
GetInstructionSetPointerSize(oat_header_->GetInstructionSet()));
size_t number_of_entries = 0u;
bool first_index = true;
for (uint32_t method_index : method_indexes.Indexes()) {
uint32_t bss_offset = bss_method_entries_.Get(MethodReference(dex_file, method_index));
if (first_index || !encoder.TryMerge(method_index, bss_offset)) {
encoder.Reset(method_index, bss_offset);
++number_of_entries;
first_index = false;
}
}
DCHECK_NE(number_of_entries, 0u);
offset += MethodBssMapping::ComputeSize(number_of_entries);
}
}
// Check that all dex files targeted by method bss entries are in `*dex_files_`.
CHECK_EQ(number_of_dex_files, bss_method_entry_references_.size());
return offset;
}
size_t OatWriter::InitOatDexFiles(size_t offset) {
// Initialize offsets of oat 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::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_->GetCompilerOptions().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) = 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) {
if (!compiler_driver_->GetCompilerOptions().IsAnyCompilationEnabled()) {
return offset;
}
InitCodeMethodVisitor code_visitor(this, offset);
bool success = VisitDexMethods(&code_visitor);
DCHECK(success);
offset = code_visitor.GetOffset();
if (HasImage()) {
InitImageMethodVisitor image_visitor(this, offset, dex_files_);
success = VisitDexMethods(&image_visitor);
image_visitor.Postprocess();
DCHECK(success);
offset = image_visitor.GetOffset();
}
return offset;
}
void OatWriter::InitBssLayout(InstructionSet instruction_set) {
{
InitBssLayoutMethodVisitor visitor(this);
bool success = VisitDexMethods(&visitor);
DCHECK(success);
}
DCHECK_EQ(bss_size_, 0u);
if (HasBootImage()) {
DCHECK(bss_string_entries_.empty());
if (bss_method_entries_.empty() && bss_type_entries_.empty()) {
// Nothing to put to the .bss section.
return;
}
}
// Allocate space for app dex cache arrays in the .bss section.
PointerSize pointer_size = GetInstructionSetPointerSize(instruction_set);
if (!HasBootImage()) {
for (const DexFile* dex_file : *dex_files_) {
DexCacheArraysLayout layout(pointer_size, dex_file);
bss_size_ += layout.Size();
}
}
bss_methods_offset_ = bss_size_;
// Prepare offsets for .bss ArtMethod entries.
for (auto& entry : bss_method_entries_) {
DCHECK_EQ(entry.second, 0u);
entry.second = bss_size_;
bss_size_ += static_cast<size_t>(pointer_size);
}
bss_roots_offset_ = bss_size_;
// Prepare offsets for .bss Class entries.
for (auto& entry : bss_type_entries_) {
DCHECK_EQ(entry.second, 0u);
entry.second = bss_size_;
bss_size_ += sizeof(GcRoot<mirror::Class>);
}
// Prepare offsets for .bss String entries.
for (auto& entry : bss_string_entries_) {
DCHECK_EQ(entry.second, 0u);
entry.second = bss_size_;
bss_size_ += sizeof(GcRoot<mirror::String>);
}
}
bool OatWriter::WriteRodata(OutputStream* out) {
CHECK(write_state_ == WriteState::kWriteRoData);
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 retrieve current position in " << out->GetLocation();
}
DCHECK_GE(static_cast<size_t>(current_offset), file_offset + oat_header_->GetHeaderSize());
size_t relative_offset = current_offset - file_offset;
// Wrap out to update checksum with each write.
ChecksumUpdatingOutputStream checksum_updating_out(out, oat_header_.get());
out = &checksum_updating_out;
relative_offset = WriteClassOffsets(out, file_offset, relative_offset);
if (relative_offset == 0) {
PLOG(ERROR) << "Failed to write class offsets to " << out->GetLocation();
return false;
}
relative_offset = WriteClasses(out, file_offset, relative_offset);
if (relative_offset == 0) {
PLOG(ERROR) << "Failed to write classes to " << out->GetLocation();
return false;
}
relative_offset = WriteMethodBssMappings(out, file_offset, relative_offset);
if (relative_offset == 0) {
PLOG(ERROR) << "Failed to write method bss mappings to " << out->GetLocation();
return false;
}
relative_offset = WriteMaps(out, file_offset, relative_offset);
if (relative_offset == 0) {
PLOG(ERROR) << "Failed to write oat code to " << out->GetLocation();
return false;
}
relative_offset = WriteOatDexFiles(out, file_offset, relative_offset);
if (relative_offset == 0) {
PLOG(ERROR) << "Failed to write oat dex information 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;
}
class OatWriter::WriteQuickeningInfoMethodVisitor : public DexMethodVisitor {
public:
WriteQuickeningInfoMethodVisitor(OatWriter* writer,
OutputStream* out,
uint32_t offset,
SafeMap<const uint8_t*, uint32_t>* offset_map)
: DexMethodVisitor(writer, offset),
out_(out),
written_bytes_(0u),
offset_map_(offset_map) {}
bool VisitMethod(size_t class_def_method_index ATTRIBUTE_UNUSED, const ClassDataItemIterator& it)
OVERRIDE {
uint32_t method_idx = it.GetMemberIndex();
CompiledMethod* compiled_method =
writer_->compiler_driver_->GetCompiledMethod(MethodReference(dex_file_, method_idx));
if (HasQuickeningInfo(compiled_method)) {
ArrayRef<const uint8_t> map = compiled_method->GetVmapTable();
// 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.
if (offset_map_->find(map.data()) == offset_map_->end()) {
uint32_t length = map.size() * sizeof(map.front());
offset_map_->Put(map.data(), written_bytes_);
if (!out_->WriteFully(&length, sizeof(length)) ||
!out_->WriteFully(map.data(), length)) {
PLOG(ERROR) << "Failed to write quickening info for "
<< dex_file_->PrettyMethod(it.GetMemberIndex()) << " to "
<< out_->GetLocation();
return false;
}
written_bytes_ += sizeof(length) + length;
offset_ += sizeof(length) + length;
}
}
return true;
}
size_t GetNumberOfWrittenBytes() const {
return written_bytes_;
}
private:
OutputStream* const out_;
size_t written_bytes_;
// Maps quickening map to its offset in the file.
SafeMap<const uint8_t*, uint32_t>* offset_map_;
};
class OatWriter::WriteQuickeningIndicesMethodVisitor {
public:
WriteQuickeningIndicesMethodVisitor(OutputStream* out,
uint32_t indices_offset,
const SafeMap<const uint8_t*, uint32_t>& offset_map,
std::vector<uint32_t>* dex_files_offset)
: out_(out),
indices_offset_(indices_offset),
written_bytes_(0u),
dex_files_offset_(dex_files_offset),
offset_map_(offset_map) {}
bool VisitDexMethods(const std::vector<const DexFile*>& dex_files, const CompilerDriver& driver) {
for (const DexFile* dex_file : dex_files) {
// Record the offset for this current dex file. It will be written in the vdex file
// later.
dex_files_offset_->push_back(indices_offset_ + GetNumberOfWrittenBytes());
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) {
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) {
continue;
}
for (ClassDataItemIterator class_it(*dex_file, class_data);
class_it.HasNext();
class_it.Next()) {
if (!class_it.IsAtMethod()) {
continue;
}
uint32_t method_idx = class_it.GetMemberIndex();
CompiledMethod* compiled_method =
driver.GetCompiledMethod(MethodReference(dex_file, method_idx));
if (HasQuickeningInfo(compiled_method)) {
uint32_t code_item_offset = class_it.GetMethodCodeItemOffset();
uint32_t offset = offset_map_.Get(compiled_method->GetVmapTable().data());
if (!out_->WriteFully(&code_item_offset, sizeof(code_item_offset)) ||
!out_->WriteFully(&offset, sizeof(offset))) {
PLOG(ERROR) << "Failed to write quickening info for "
<< dex_file->PrettyMethod(method_idx) << " to "
<< out_->GetLocation();
return false;
}
written_bytes_ += sizeof(code_item_offset) + sizeof(offset);
}
}
}
}
return true;
}
size_t GetNumberOfWrittenBytes() const {
return written_bytes_;
}
private:
OutputStream* const out_;
const uint32_t indices_offset_;
size_t written_bytes_;
std::vector<uint32_t>* dex_files_offset_;
// Maps quickening map to its offset in the file.
const SafeMap<const uint8_t*, uint32_t>& offset_map_;
};
bool OatWriter::WriteQuickeningInfo(OutputStream* vdex_out) {
if (!kIsVdexEnabled) {
return true;
}
size_t initial_offset = vdex_size_;
size_t start_offset = RoundUp(initial_offset, 4u);
vdex_size_ = start_offset;
vdex_quickening_info_offset_ = vdex_size_;
size_quickening_info_alignment_ = start_offset - initial_offset;
off_t actual_offset = vdex_out->Seek(start_offset, kSeekSet);
if (actual_offset != static_cast<off_t>(start_offset)) {
PLOG(ERROR) << "Failed to seek to quickening info section. Actual: " << actual_offset
<< " Expected: " << start_offset
<< " Output: " << vdex_out->GetLocation();
return false;
}
if (compiler_driver_->GetCompilerOptions().IsAnyCompilationEnabled()) {
std::vector<uint32_t> dex_files_indices;
SafeMap<const uint8_t*, uint32_t> offset_map;
WriteQuickeningInfoMethodVisitor visitor1(this, vdex_out, start_offset, &offset_map);
if (!VisitDexMethods(&visitor1)) {
PLOG(ERROR) << "Failed to write the vdex quickening info. File: " << vdex_out->GetLocation();
return false;
}
WriteQuickeningIndicesMethodVisitor visitor2(vdex_out,
visitor1.GetNumberOfWrittenBytes(),
offset_map,
&dex_files_indices);
if (!visitor2.VisitDexMethods(*dex_files_, *compiler_driver_)) {
PLOG(ERROR) << "Failed to write the vdex quickening info. File: " << vdex_out->GetLocation();
return false;
}
DCHECK_EQ(dex_files_->size(), dex_files_indices.size());
if (!vdex_out->WriteFully(
dex_files_indices.data(), sizeof(dex_files_indices[0]) * dex_files_indices.size())) {
PLOG(ERROR) << "Failed to write the vdex quickening info. File: " << vdex_out->GetLocation();
return false;
}
if (!vdex_out->Flush()) {
PLOG(ERROR) << "Failed to flush stream after writing quickening info."
<< " File: " << vdex_out->GetLocation();
return false;
}
size_quickening_info_ = visitor1.GetNumberOfWrittenBytes() +
visitor2.GetNumberOfWrittenBytes() +
dex_files_->size() * sizeof(uint32_t);
} else {
// We know we did not quicken.
size_quickening_info_ = 0;
}
vdex_size_ += size_quickening_info_;
return true;
}
bool OatWriter::WriteVerifierDeps(OutputStream* vdex_out, verifier::VerifierDeps* verifier_deps) {
if (!kIsVdexEnabled) {
return true;
}
if (verifier_deps == nullptr) {
// Nothing to write. Record the offset, but no need
// for alignment.
vdex_verifier_deps_offset_ = vdex_size_;
return true;
}
size_t initial_offset = vdex_size_;
size_t start_offset = RoundUp(initial_offset, 4u);
vdex_size_ = start_offset;
vdex_verifier_deps_offset_ = vdex_size_;
size_verifier_deps_alignment_ = start_offset - initial_offset;
off_t actual_offset = vdex_out->Seek(start_offset, kSeekSet);
if (actual_offset != static_cast<off_t>(start_offset)) {
PLOG(ERROR) << "Failed to seek to verifier deps section. Actual: " << actual_offset
<< " Expected: " << start_offset
<< " Output: " << vdex_out->GetLocation();
return false;
}
std::vector<uint8_t> buffer;
verifier_deps->Encode(*dex_files_, &buffer);
if (!vdex_out->WriteFully(buffer.data(), buffer.size())) {
PLOG(ERROR) << "Failed to write verifier deps."
<< " File: " << vdex_out->GetLocation();
return false;
}
if (!vdex_out->Flush()) {
PLOG(ERROR) << "Failed to flush stream after writing verifier deps."
<< " File: " << vdex_out->GetLocation();
return false;
}
size_verifier_deps_ = buffer.size();
vdex_size_ += size_verifier_deps_;
return true;
}
bool OatWriter::WriteCode(OutputStream* out) {
CHECK(write_state_ == WriteState::kWriteText);
// Wrap out to update checksum with each write.
ChecksumUpdatingOutputStream checksum_updating_out(out, oat_header_.get());
out = &checksum_updating_out;
SetMultiOatRelativePatcherAdjustment();
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_vdex_header_);
DO_STAT(size_vdex_checksums_);
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_verifier_deps_);
DO_STAT(size_verifier_deps_alignment_);
DO_STAT(size_quickening_info_);
DO_STAT(size_quickening_info_alignment_);
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_vmap_table_);
DO_STAT(size_method_info_);
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_dex_file_dex_layout_sections_offset_);
DO_STAT(size_oat_dex_file_dex_layout_sections_);
DO_STAT(size_oat_dex_file_dex_layout_sections_alignment_);
DO_STAT(size_oat_dex_file_method_bss_mapping_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_);
DO_STAT(size_method_bss_mappings_);
#undef DO_STAT
VLOG(compiler) << "size_total=" << PrettySize(size_total) << " (" << size_total << "B)";
CHECK_EQ(vdex_size_ + oat_size_, size_total);
CHECK_EQ(file_offset + size_total - vdex_size_, static_cast<size_t>(oat_end_file_offset));
}
CHECK_EQ(file_offset + oat_size_, static_cast<size_t>(oat_end_file_offset));
CHECK_EQ(oat_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_->GetCompilerOptions().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;
}
size_t OatWriter::WriteClassOffsets(OutputStream* out, size_t file_offset, size_t relative_offset) {
for (OatDexFile& oat_dex_file : oat_dex_files_) {
if (oat_dex_file.class_offsets_offset_ != 0u) {
// Class offsets are required to be 4 byte aligned.
if (UNLIKELY(!IsAligned<4u>(relative_offset))) {
size_t padding_size = RoundUp(relative_offset, 4u) - relative_offset;
if (!WriteUpTo16BytesAlignment(out, padding_size, &size_oat_class_offsets_alignment_)) {
return 0u;
}
relative_offset += padding_size;
}
DCHECK_OFFSET();
if (!oat_dex_file.WriteClassOffsets(this, out)) {
return 0u;
}
relative_offset += oat_dex_file.GetClassOffsetsRawSize();
}
}
return relative_offset;
}
size_t OatWriter::WriteClasses(OutputStream* out, size_t file_offset, size_t relative_offset) {
const bool may_have_compiled = MayHaveCompiledMethods();
if (may_have_compiled) {
CHECK_EQ(oat_class_headers_.size(), oat_classes_.size());
}
for (size_t i = 0; i < oat_class_headers_.size(); ++i) {
// If there are any classes, the class offsets allocation aligns the offset.
DCHECK_ALIGNED(relative_offset, 4u);
DCHECK_OFFSET();
if (!oat_class_headers_[i].Write(this, out, oat_data_offset_)) {
return 0u;
}
relative_offset += oat_class_headers_[i].SizeOf();
if (may_have_compiled) {
if (!oat_classes_[i].Write(this, out)) {
return 0u;
}
relative_offset += oat_classes_[i].SizeOf();
}
}
return relative_offset;
}
size_t OatWriter::WriteMaps(OutputStream* out, size_t file_offset, size_t relative_offset) {
{
size_t vmap_tables_offset = relative_offset;
WriteMapMethodVisitor visitor(this, out, file_offset, relative_offset);
if (UNLIKELY(!VisitDexMethods(&visitor))) {
return 0;
}
relative_offset = visitor.GetOffset();
size_vmap_table_ = relative_offset - vmap_tables_offset;
}
{
size_t method_infos_offset = relative_offset;
WriteMethodInfoVisitor visitor(this, out, file_offset, relative_offset);
if (UNLIKELY(!VisitDexM