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LeafOS / LeafOS-Project / android_art / 78f3c72e8948087352788997a70854dee613352c / . / dex2oat / linker / oat_writer.cc
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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 <algorithm>
#include <memory>
#include <vector>
#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/file_utils.h"
#include "base/indenter.h"
#include "base/logging.h" // For VLOG
#include "base/os.h"
#include "base/safe_map.h"
#include "base/stl_util.h"
#include "base/unix_file/fd_file.h"
#include "base/zip_archive.h"
#include "class_linker.h"
#include "class_table-inl.h"
#include "code_info_table_deduper.h"
#include "debug/method_debug_info.h"
#include "dex/art_dex_file_loader.h"
#include "dex/class_accessor-inl.h"
#include "dex/dex_file-inl.h"
#include "dex/dex_file_loader.h"
#include "dex/dex_file_types.h"
#include "dex/dex_file_verifier.h"
#include "dex/standard_dex_file.h"
#include "dex/type_lookup_table.h"
#include "dex/verification_results.h"
#include "dex_container.h"
#include "dexlayout.h"
#include "driver/compiled_method-inl.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/index_bss_mapping_encoder.h"
#include "linker/linker_patch.h"
#include "linker/multi_oat_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.h"
#include "oat_quick_method_header.h"
#include "profile/profile_compilation_info.h"
#include "quicken_info.h"
#include "scoped_thread_state_change-inl.h"
#include "stack_map.h"
#include "stream/buffered_output_stream.h"
#include "stream/file_output_stream.h"
#include "stream/output_stream.h"
#include "vdex_file.h"
#include "verifier/verifier_deps.h"
namespace art {
namespace linker {
namespace { // anonymous namespace
// If we write dex layout info in the oat file.
static constexpr bool kWriteDexLayoutInfo = true;
// Force the OAT method layout to be sorted-by-name instead of
// the default (class_def_idx, method_idx).
//
// Otherwise if profiles are used, that will act as
// the primary sort order.
//
// A bit easier to use for development since oatdump can easily
// show that things are being re-ordered when two methods aren't adjacent.
static constexpr bool kOatWriterForceOatCodeLayout = false;
static constexpr bool kOatWriterDebugOatCodeLayout = false;
using UnalignedDexFileHeader __attribute__((__aligned__(1))) = DexFile::Header;
const UnalignedDexFileHeader* AsUnalignedDexFileHeader(const uint8_t* raw_data) {
return reinterpret_cast<const UnalignedDexFileHeader*>(raw_data);
}
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
class OatWriter::ChecksumUpdatingOutputStream : public OutputStream {
public:
ChecksumUpdatingOutputStream(OutputStream* out, OatWriter* writer)
: OutputStream(out->GetLocation()), out_(out), writer_(writer) { }
bool WriteFully(const void* buffer, size_t byte_count) override {
if (buffer != nullptr) {
const uint8_t* bytes = reinterpret_cast<const uint8_t*>(buffer);
uint32_t old_checksum = writer_->oat_checksum_;
writer_->oat_checksum_ = adler32(old_checksum, bytes, byte_count);
} else {
DCHECK_EQ(0U, 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_;
OatWriter* const writer_;
};
// 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,
ClassStatus status)
: status_(enum_cast<uint16_t>(status)),
offset_(offset) {
// We just arbitrarily say that 0 methods means OatClassType::kNoneCompiled and that we won't
// use OatClassType::kAllCompiled unless there is at least one compiled method. This means in
// an interpreter only system, we can assert that all classes are OatClassType::kNoneCompiled.
if (num_non_null_compiled_methods == 0) {
type_ = enum_cast<uint16_t>(OatClassType::kNoneCompiled);
} else if (num_non_null_compiled_methods == num_methods) {
type_ = enum_cast<uint16_t>(OatClassType::kAllCompiled);
} else {
type_ = enum_cast<uint16_t>(OatClassType::kSomeCompiled);
}
}
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(sizeof(ClassStatus) <= sizeof(uint16_t), "class status won't fit in 16bits");
uint16_t status_;
static_assert(sizeof(OatClassType) <= sizeof(uint16_t), "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 OatClassType::kSomeCompiled.
dchecked_vector<uint32_t> oat_method_offsets_offsets_from_oat_class_;
// Data to write.
// Number of methods recorded in OatClass. For `OatClassType::kNoneCompiled`
// this shall be zero and shall not be written to the file, otherwise it
// shall be the number of methods in the class definition. It is used to
// determine the size of `BitVector` data for `OatClassType::kSomeCompiled` and
// the size of the `OatMethodOffsets` table for `OatClassType::kAllCompiled`.
// (The size of the `OatMethodOffsets` table for `OatClassType::kSomeCompiled`
// is determined by the number of bits set in the `BitVector` data.)
uint32_t num_methods_;
// Bit vector indexed by ClassDef method index. When OatClass::type_ is
// OatClassType::kSomeCompiled, a set bit indicates the method has an
// OatMethodOffsets in methods_offsets_, otherwise
// the entry was omitted to save space. If OatClass::type_ is
// not is OatClassType::kSomeCompiled, 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:
explicit OatDexFile(std::unique_ptr<const DexFile> dex_file);
OatDexFile(OatDexFile&& src) = default;
const DexFile* GetDexFile() const { return dex_file_.get(); }
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]);
}
std::unique_ptr<const DexFile> dex_file_;
std::unique_ptr<std::string> dex_file_location_;
std::vector<uint8_t> cdex_main_section_;
// Dex file size. Passed in the constructor, but could be
// overwritten by LayoutDexFile.
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_;
///// Start of data to write to vdex/oat file.
const uint32_t dex_file_location_size_;
const char* const dex_file_location_data_;
// The checksum of the dex file.
const uint32_t dex_file_location_checksum_;
// Offset of the dex file in the vdex file. Set when writing dex files in
// SeekToDexFile.
uint32_t dex_file_offset_;
// The lookup table offset in the oat file. Set in WriteTypeLookupTables.
uint32_t lookup_table_offset_;
// Class and BSS offsets set in PrepareLayout.
uint32_t class_offsets_offset_;
uint32_t method_bss_mapping_offset_;
uint32_t type_bss_mapping_offset_;
uint32_t public_type_bss_mapping_offset_;
uint32_t package_type_bss_mapping_offset_;
uint32_t string_bss_mapping_offset_;
// Offset of dex sections that will have different runtime madvise states.
// Set in WriteDexLayoutSections.
uint32_t dex_sections_layout_offset_;
// Data to write to a separate section. We set the length
// of the vector in OpenDexFiles.
dchecked_vector<uint32_t> class_offsets_;
// Dex section layout info to serialize.
DexLayoutSections dex_sections_layout_;
///// End of data to write to vdex/oat file.
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(const CompilerOptions& compiler_options,
const VerificationResults* verification_results,
TimingLogger* timings,
ProfileCompilationInfo* info,
CompactDexLevel compact_dex_level)
: write_state_(WriteState::kAddingDexFileSources),
timings_(timings),
compiler_driver_(nullptr),
compiler_options_(compiler_options),
verification_results_(verification_results),
image_writer_(nullptr),
extract_dex_files_into_vdex_(true),
vdex_begin_(nullptr),
dex_files_(nullptr),
primary_oat_file_(false),
vdex_size_(0u),
vdex_dex_files_offset_(0u),
vdex_dex_shared_data_offset_(0u),
vdex_verifier_deps_offset_(0u),
vdex_quickening_info_offset_(0u),
vdex_lookup_tables_offset_(0u),
oat_checksum_(adler32(0L, Z_NULL, 0)),
code_size_(0u),
oat_size_(0u),
data_bimg_rel_ro_start_(0u),
data_bimg_rel_ro_size_(0u),
bss_start_(0u),
bss_size_(0u),
bss_methods_offset_(0u),
bss_roots_offset_(0u),
data_bimg_rel_ro_entries_(),
bss_method_entry_references_(),
bss_method_entries_(),
bss_type_entries_(),
bss_public_type_entries_(),
bss_package_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_quickening_table_offset_(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_vdex_lookup_table_alignment_(0),
size_vdex_lookup_table_(0),
size_interpreter_to_interpreter_bridge_(0),
size_interpreter_to_compiled_code_bridge_(0),
size_jni_dlsym_lookup_trampoline_(0),
size_jni_dlsym_lookup_critical_trampoline_(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_nterp_trampoline_(0),
size_trampoline_alignment_(0),
size_method_header_(0),
size_code_(0),
size_code_alignment_(0),
size_data_bimg_rel_ro_(0),
size_data_bimg_rel_ro_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_dex_file_type_bss_mapping_offset_(0),
size_oat_dex_file_public_type_bss_mapping_offset_(0),
size_oat_dex_file_package_type_bss_mapping_offset_(0),
size_oat_dex_file_string_bss_mapping_offset_(0),
size_bcp_bss_info_size_(0),
size_bcp_bss_info_method_bss_mapping_offset_(0),
size_bcp_bss_info_type_bss_mapping_offset_(0),
size_bcp_bss_info_public_type_bss_mapping_offset_(0),
size_bcp_bss_info_package_type_bss_mapping_offset_(0),
size_bcp_bss_info_string_bss_mapping_offset_(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_num_methods_(0),
size_oat_class_method_bitmaps_(0),
size_oat_class_method_offsets_(0),
size_method_bss_mappings_(0u),
size_type_bss_mappings_(0u),
size_public_type_bss_mappings_(0u),
size_package_type_bss_mappings_(0u),
size_string_bss_mappings_(0u),
relative_patcher_(nullptr),
profile_compilation_info_(info),
compact_dex_level_(compact_dex_level) {}
static bool ValidateDexFileHeader(const uint8_t* raw_header, const char* location) {
const bool valid_standard_dex_magic = DexFileLoader::IsMagicValid(raw_header);
if (!valid_standard_dex_magic) {
LOG(ERROR) << "Invalid magic number in dex file header. " << " File: " << location;
return false;
}
if (!DexFileLoader::IsVersionAndMagicValid(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::AddDexFileSource(const char* filename, const char* location) {
DCHECK(write_state_ == WriteState::kAddingDexFileSources);
File fd(filename, O_RDONLY, /* check_usage= */ false);
if (fd.Fd() == -1) {
PLOG(ERROR) << "Failed to open dex file: '" << filename << "'";
return false;
}
return AddDexFileSource(std::move(fd), location);
}
// Add dex file source(s) from a file specified by a file handle.
// Note: The `dex_file_fd` specifies a plain dex file or a zip file.
bool OatWriter::AddDexFileSource(File&& dex_file_fd, const char* location) {
DCHECK(write_state_ == WriteState::kAddingDexFileSources);
std::string error_msg;
ArtDexFileLoader loader(dex_file_fd.Release(), location);
std::vector<std::unique_ptr<const DexFile>> dex_files;
if (!loader.Open(/*verify=*/false,
/*verify_checksum=*/false,
&error_msg,
&dex_files)) {
LOG(ERROR) << "Failed to open dex file '" << location << "': " << error_msg;
return false;
}
for (auto& dex_file : dex_files) {
oat_dex_files_.emplace_back(std::move(dex_file));
}
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) {
DCHECK(write_state_ == WriteState::kAddingDexFileSources);
DCHECK(vdex_file.HasDexSection());
const uint8_t* current_dex_data = nullptr;
size_t i = 0;
for (; i < vdex_file.GetNumberOfDexFiles(); ++i) {
current_dex_data = vdex_file.GetNextDexFileData(current_dex_data, i);
if (current_dex_data == nullptr) {
LOG(ERROR) << "Unexpected number of dex files in vdex " << location;
return false;
}
if (!DexFileLoader::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.
std::string multidex_location = DexFileLoader::GetMultiDexLocation(i, location);
const UnalignedDexFileHeader* header = AsUnalignedDexFileHeader(current_dex_data);
if (!AddRawDexFileSource({current_dex_data, header->file_size_},
multidex_location.c_str(),
vdex_file.GetLocationChecksum(i))) {
return false;
}
}
if (vdex_file.GetNextDexFileData(current_dex_data, i) != 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) {
DCHECK(write_state_ == WriteState::kAddingDexFileSources);
std::string error_msg;
ArtDexFileLoader loader(data.data(), data.size(), location);
auto dex_file = loader.Open(location_checksum,
nullptr,
/*verify=*/false,
/*verify_checksum=*/false,
&error_msg);
if (dex_file == nullptr) {
LOG(ERROR) << "Failed to open dex file '" << location << "': " << error_msg;
return false;
}
oat_dex_files_.emplace_back(std::move(dex_file));
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 GetCompilerOptions().IsAnyCompilationEnabled();
}
bool OatWriter::WriteAndOpenDexFiles(
File* vdex_file,
bool verify,
bool use_existing_vdex,
CopyOption copy_dex_files,
/*out*/ std::vector<MemMap>* opened_dex_files_map,
/*out*/ std::vector<std::unique_ptr<const DexFile>>* opened_dex_files) {
CHECK(write_state_ == WriteState::kAddingDexFileSources);
// Reserve space for Vdex header, sections, and checksums.
size_vdex_header_ = sizeof(VdexFile::VdexFileHeader) +
VdexSection::kNumberOfSections * sizeof(VdexFile::VdexSectionHeader);
size_vdex_checksums_ = oat_dex_files_.size() * sizeof(VdexFile::VdexChecksum);
vdex_size_ = size_vdex_header_ + size_vdex_checksums_;
// Write DEX files into VDEX, mmap and open them.
std::vector<MemMap> dex_files_map;
std::vector<std::unique_ptr<const DexFile>> dex_files;
if (!WriteDexFiles(vdex_file, verify, use_existing_vdex, copy_dex_files, &dex_files_map) ||
!OpenDexFiles(vdex_file, verify, &dex_files_map, &dex_files)) {
return false;
}
*opened_dex_files_map = std::move(dex_files_map);
*opened_dex_files = std::move(dex_files);
// Create type lookup tables to speed up lookups during compilation.
InitializeTypeLookupTables(*opened_dex_files);
write_state_ = WriteState::kStartRoData;
return true;
}
bool OatWriter::StartRoData(const std::vector<const DexFile*>& dex_files,
OutputStream* oat_rodata,
SafeMap<std::string, std::string>* key_value_store) {
CHECK(write_state_ == WriteState::kStartRoData);
// Record the ELF rodata section offset, i.e. the beginning of the OAT data.
if (!RecordOatDataOffset(oat_rodata)) {
return false;
}
// Record whether this is the primary oat file.
primary_oat_file_ = (key_value_store != nullptr);
// Initialize OAT header.
oat_size_ = InitOatHeader(dchecked_integral_cast<uint32_t>(oat_dex_files_.size()),
key_value_store);
ChecksumUpdatingOutputStream checksum_updating_rodata(oat_rodata, this);
// Write dex layout sections into the oat file.
if (!WriteDexLayoutSections(&checksum_updating_rodata, dex_files)) {
return false;
}
write_state_ = WriteState::kInitialize;
return true;
}
// Initialize the writer with the given parameters.
void OatWriter::Initialize(const CompilerDriver* compiler_driver,
ImageWriter* image_writer,
const std::vector<const DexFile*>& dex_files) {
CHECK(write_state_ == WriteState::kInitialize);
compiler_driver_ = compiler_driver;
image_writer_ = image_writer;
dex_files_ = &dex_files;
write_state_ = WriteState::kPrepareLayout;
}
void OatWriter::PrepareLayout(MultiOatRelativePatcher* relative_patcher) {
CHECK(write_state_ == WriteState::kPrepareLayout);
relative_patcher_ = relative_patcher;
SetMultiOatRelativePatcherAdjustment();
if (GetCompilerOptions().IsBootImage() || GetCompilerOptions().IsBootImageExtension()) {
CHECK(image_writer_ != nullptr);
}
InstructionSet instruction_set = compiler_options_.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("InitIndexBssMappings", timings_);
offset = InitIndexBssMappings(offset);
}
{
TimingLogger::ScopedTiming split("InitOatMaps", timings_);
offset = InitOatMaps(offset);
}
{
TimingLogger::ScopedTiming split("InitOatDexFiles", timings_);
oat_header_->SetOatDexFilesOffset(offset);
offset = InitOatDexFiles(offset);
}
{
TimingLogger::ScopedTiming split("InitBcpBssInfo", timings_);
offset = InitBcpBssInfo(offset);
}
{
TimingLogger::ScopedTiming split("InitOatCode", timings_);
offset = InitOatCode(offset);
}
{
TimingLogger::ScopedTiming split("InitOatCodeDexFiles", timings_);
offset = InitOatCodeDexFiles(offset);
code_size_ = offset - GetOatHeader().GetExecutableOffset();
}
{
TimingLogger::ScopedTiming split("InitDataBimgRelRoLayout", timings_);
offset = InitDataBimgRelRoLayout(offset);
}
oat_size_ = offset; // .bss does not count towards oat_size_.
bss_start_ = (bss_size_ != 0u) ? RoundUp(oat_size_, kPageSize) : 0u;
CHECK_EQ(dex_files_->size(), oat_dex_files_.size());
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_(dex::kDexNoIndex) {}
virtual bool StartClass(const DexFile* dex_file, size_t class_def_index) {
DCHECK(dex_file_ == nullptr);
DCHECK_EQ(class_def_index_, dex::kDexNoIndex);
dex_file_ = dex_file;
class_def_index_ = class_def_index;
return true;
}
virtual bool VisitMethod(size_t class_def_method_index, const ClassAccessor::Method& method) = 0;
virtual bool EndClass() {
if (kIsDebugBuild) {
dex_file_ = nullptr;
class_def_index_ = dex::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) {
return method != nullptr && !method->GetQuickCode().empty();
}
class OatWriter::InitBssLayoutMethodVisitor : public DexMethodVisitor {
public:
explicit InitBssLayoutMethodVisitor(OatWriter* writer)
: DexMethodVisitor(writer, /* offset */ 0u) {}
bool VisitMethod([[maybe_unused]] size_t class_def_method_index,
const ClassAccessor::Method& method) 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_, method.GetIndex()));
if (HasCompiledCode(compiled_method)) {
for (const LinkerPatch& patch : compiled_method->GetPatches()) {
if (patch.GetType() == LinkerPatch::Type::kDataBimgRelRo) {
writer_->data_bimg_rel_ro_entries_.Overwrite(patch.BootImageOffset(),
/* placeholder */ 0u);
} else if (patch.GetType() == LinkerPatch::Type::kMethodBssEntry) {
MethodReference target_method = patch.TargetMethod();
AddBssReference(target_method,
target_method.dex_file->NumMethodIds(),
&writer_->bss_method_entry_references_);
writer_->bss_method_entries_.Overwrite(target_method, /* placeholder */ 0u);
} else if (patch.GetType() == LinkerPatch::Type::kTypeBssEntry) {
TypeReference target_type(patch.TargetTypeDexFile(), patch.TargetTypeIndex());
AddBssReference(target_type,
target_type.dex_file->NumTypeIds(),
&writer_->bss_type_entry_references_);
writer_->bss_type_entries_.Overwrite(target_type, /* placeholder */ 0u);
} else if (patch.GetType() == LinkerPatch::Type::kPublicTypeBssEntry) {
TypeReference target_type(patch.TargetTypeDexFile(), patch.TargetTypeIndex());
AddBssReference(target_type,
target_type.dex_file->NumTypeIds(),
&writer_->bss_public_type_entry_references_);
writer_->bss_public_type_entries_.Overwrite(target_type, /* placeholder */ 0u);
} else if (patch.GetType() == LinkerPatch::Type::kPackageTypeBssEntry) {
TypeReference target_type(patch.TargetTypeDexFile(), patch.TargetTypeIndex());
AddBssReference(target_type,
target_type.dex_file->NumTypeIds(),
&writer_->bss_package_type_entry_references_);
writer_->bss_package_type_entries_.Overwrite(target_type, /* placeholder */ 0u);
} else if (patch.GetType() == LinkerPatch::Type::kStringBssEntry) {
StringReference target_string(patch.TargetStringDexFile(), patch.TargetStringIndex());
AddBssReference(target_string,
target_string.dex_file->NumStringIds(),
&writer_->bss_string_entry_references_);
writer_->bss_string_entries_.Overwrite(target_string, /* placeholder */ 0u);
}
}
} else {
DCHECK(compiled_method == nullptr || compiled_method->GetPatches().empty());
}
return true;
}
private:
void AddBssReference(const DexFileReference& ref,
size_t number_of_indexes,
/*inout*/ SafeMap<const DexFile*, BitVector>* references) {
DCHECK(ContainsElement(*writer_->dex_files_, ref.dex_file) ||
ContainsElement(Runtime::Current()->GetClassLinker()->GetBootClassPath(), ref.dex_file));
DCHECK_LT(ref.index, number_of_indexes);
auto refs_it = references->find(ref.dex_file);
if (refs_it == references->end()) {
refs_it = references->Put(
ref.dex_file,
BitVector(number_of_indexes, /* expandable */ false, Allocator::GetMallocAllocator()));
refs_it->second.ClearAllBits();
}
refs_it->second.SetBit(ref.index);
}
};
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([[maybe_unused]] size_t class_def_method_index,
const ClassAccessor::Method& method) 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 = method.GetIndex();
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_);
ClassStatus status;
bool found = writer_->compiler_driver_->GetCompiledClass(class_ref, &status);
if (!found) {
const VerificationResults* results = writer_->verification_results_;
if (results != nullptr && results->IsClassRejected(class_ref)) {
// The oat class status is used only for verification of resolved classes,
// so use ClassStatus::kErrorResolved whether the class was resolved or unresolved
// during compile-time verification.
status = ClassStatus::kErrorResolved;
} else {
status = ClassStatus::kNotReady;
}
}
// We never emit kRetryVerificationAtRuntime, instead we mark the class as
// resolved and the class will therefore be re-verified at runtime.
if (status == ClassStatus::kRetryVerificationAtRuntime) {
status = ClassStatus::kResolved;
}
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_;
};
// .bss mapping offsets used for BCP DexFiles.
struct OatWriter::BssMappingInfo {
// Offsets set in PrepareLayout.
uint32_t method_bss_mapping_offset = 0u;
uint32_t type_bss_mapping_offset = 0u;
uint32_t public_type_bss_mapping_offset = 0u;
uint32_t package_type_bss_mapping_offset = 0u;
uint32_t string_bss_mapping_offset = 0u;
// Offset of the BSSInfo start from beginning of OatHeader. It is used to validate file position
// when writing.
size_t offset_ = 0u;
static size_t SizeOf() {
return sizeof(method_bss_mapping_offset) +
sizeof(type_bss_mapping_offset) +
sizeof(public_type_bss_mapping_offset) +
sizeof(package_type_bss_mapping_offset) +
sizeof(string_bss_mapping_offset);
}
bool Write(OatWriter* oat_writer, OutputStream* out) const;
};
// CompiledMethod + metadata required to do ordered method layout.
//
// See also OrderedMethodVisitor.
struct OatWriter::OrderedMethodData {
uint32_t hotness_bits;
OatClass* oat_class;
CompiledMethod* compiled_method;
MethodReference method_reference;
size_t method_offsets_index;
size_t class_def_index;
uint32_t access_flags;
const dex::CodeItem* code_item;
// A value of -1 denotes missing debug info
static constexpr size_t kDebugInfoIdxInvalid = static_cast<size_t>(-1);
// Index into writer_->method_info_
size_t debug_info_idx;
bool HasDebugInfo() const {
return debug_info_idx != kDebugInfoIdxInvalid;
}
// Bin each method according to the profile flags.
//
// Groups by e.g.
// -- not hot at all
// -- hot
// -- hot and startup
// -- hot and post-startup
// -- hot and startup and poststartup
// -- startup
// -- startup and post-startup
// -- post-startup
//
// (See MethodHotness enum definition for up-to-date binning order.)
bool operator<(const OrderedMethodData& other) const {
if (kOatWriterForceOatCodeLayout) {
// Development flag: Override default behavior by sorting by name.
std::string name = method_reference.PrettyMethod();
std::string other_name = other.method_reference.PrettyMethod();
return name < other_name;
}
// Use the profile's method hotness to determine sort order.
if (hotness_bits < other.hotness_bits) {
return true;
}
// Default: retain the original order.
return false;
}
};
// Given a queue of CompiledMethod in some total order,
// visit each one in that order.
class OatWriter::OrderedMethodVisitor {
public:
explicit OrderedMethodVisitor(OrderedMethodList ordered_methods)
: ordered_methods_(std::move(ordered_methods)) {
}
virtual ~OrderedMethodVisitor() {}
// Invoke VisitMethod in the order of `ordered_methods`, then invoke VisitComplete.
bool Visit() REQUIRES_SHARED(Locks::mutator_lock_) {
if (!VisitStart()) {
return false;
}
for (const OrderedMethodData& method_data : ordered_methods_) {
if (!VisitMethod(method_data)) {
return false;
}
}
return VisitComplete();
}
// Invoked once at the beginning, prior to visiting anything else.
//
// Return false to abort further visiting.
virtual bool VisitStart() { return true; }
// Invoked repeatedly in the order specified by `ordered_methods`.
//
// Return false to short-circuit and to stop visiting further methods.
virtual bool VisitMethod(const OrderedMethodData& method_data)
REQUIRES_SHARED(Locks::mutator_lock_) = 0;
// Invoked once at the end, after every other method has been successfully visited.
//
// Return false to indicate the overall `Visit` has failed.
virtual bool VisitComplete() = 0;
OrderedMethodList ReleaseOrderedMethods() {
return std::move(ordered_methods_);
}
private:
// List of compiled methods, sorted by the order defined in OrderedMethodData.
// Methods can be inserted more than once in case of duplicated methods.
OrderedMethodList ordered_methods_;
};
// Visit every compiled method in order to determine its order within the OAT file.
// Methods from the same class do not need to be adjacent in the OAT code.
class OatWriter::LayoutCodeMethodVisitor final : public OatDexMethodVisitor {
public:
LayoutCodeMethodVisitor(OatWriter* writer, size_t offset)
: OatDexMethodVisitor(writer, offset),
profile_index_(ProfileCompilationInfo::MaxProfileIndex()),
profile_index_dex_file_(nullptr) {
}
bool StartClass(const DexFile* dex_file, size_t class_def_index) final {
// Update the cached `profile_index_` if needed. This happens only once per dex file
// because we visit all classes in a dex file together, so mark that as `UNLIKELY`.
if (UNLIKELY(dex_file != profile_index_dex_file_)) {
if (writer_->profile_compilation_info_ != nullptr) {
profile_index_ = writer_->profile_compilation_info_->FindDexFile(*dex_file);
} else {
DCHECK_EQ(profile_index_, ProfileCompilationInfo::MaxProfileIndex());
}
profile_index_dex_file_ = dex_file;
}
return OatDexMethodVisitor::StartClass(dex_file, class_def_index);
}
bool VisitMethod(size_t class_def_method_index, const ClassAccessor::Method& method) final
REQUIRES_SHARED(Locks::mutator_lock_) {
Locks::mutator_lock_->AssertSharedHeld(Thread::Current());
OatClass* oat_class = &writer_->oat_classes_[oat_class_index_];
CompiledMethod* compiled_method = oat_class->GetCompiledMethod(class_def_method_index);
if (HasCompiledCode(compiled_method)) {
size_t debug_info_idx = OrderedMethodData::kDebugInfoIdxInvalid;
{
const CompilerOptions& compiler_options = writer_->GetCompilerOptions();
ArrayRef<const uint8_t> quick_code = compiled_method->GetQuickCode();
uint32_t code_size = quick_code.size() * sizeof(uint8_t);
// Debug method info must be pushed in the original order
// (i.e. all methods from the same class must be adjacent in the debug info sections)
// ElfCompilationUnitWriter::Write requires this.
if (compiler_options.GenerateAnyDebugInfo() && code_size != 0) {
debug::MethodDebugInfo info = debug::MethodDebugInfo();
writer_->method_info_.push_back(info);
// The debug info is filled in LayoutReserveOffsetCodeMethodVisitor
// once we know the offsets.
//
// Store the index into writer_->method_info_ since future push-backs
// could reallocate and change the underlying data address.
debug_info_idx = writer_->method_info_.size() - 1;
}
}
// Determine the `hotness_bits`, used to determine relative order
// for OAT code layout when determining binning.
uint32_t method_index = method.GetIndex();
MethodReference method_ref(dex_file_, method_index);
uint32_t hotness_bits = 0u;
if (profile_index_ != ProfileCompilationInfo::MaxProfileIndex()) {
ProfileCompilationInfo* pci = writer_->profile_compilation_info_;
DCHECK(pci != nullptr);
// Note: Bin-to-bin order does not matter. If the kernel does or does not read-ahead
// any memory, it only goes into the buffer cache and does not grow the PSS until the
// first time that memory is referenced in the process.
constexpr uint32_t kHotBit = 1u;
constexpr uint32_t kStartupBit = 2u;
constexpr uint32_t kPostStartupBit = 4u;
hotness_bits =
(pci->IsHotMethod(profile_index_, method_index) ? kHotBit : 0u) |
(pci->IsStartupMethod(profile_index_, method_index) ? kStartupBit : 0u) |
(pci->IsPostStartupMethod(profile_index_, method_index) ? kPostStartupBit : 0u);
if (kIsDebugBuild) {
// Check for bins that are always-empty given a real profile.
if (hotness_bits == kHotBit) {
// This is not fatal, so only warn.
LOG(WARNING) << "Method " << method_ref.PrettyMethod() << " was hot but wasn't marked "
<< "either start-up or post-startup. Possible corrupted profile?";
}
}
}
// Handle duplicate methods by pushing them repeatedly.
OrderedMethodData method_data = {
hotness_bits,
oat_class,
compiled_method,
method_ref,
method_offsets_index_,
class_def_index_,
method.GetAccessFlags(),
method.GetCodeItem(),
debug_info_idx
};
ordered_methods_.push_back(method_data);
method_offsets_index_++;
}
return true;
}
OrderedMethodList ReleaseOrderedMethods() {
if (kOatWriterForceOatCodeLayout || writer_->profile_compilation_info_ != nullptr) {
// Sort by the method ordering criteria (in OrderedMethodData).
// Since most methods will have the same ordering criteria,
// we preserve the original insertion order within the same sort order.
std::stable_sort(ordered_methods_.begin(), ordered_methods_.end());
} else {
// The profile-less behavior is as if every method had 0 hotness
// associated with it.
//
// Since sorting all methods with hotness=0 should give back the same
// order as before, don't do anything.
DCHECK(std::is_sorted(ordered_methods_.begin(), ordered_methods_.end()));
}
return std::move(ordered_methods_);
}
private:
// Cached profile index for the current dex file.
ProfileCompilationInfo::ProfileIndexType profile_index_;
const DexFile* profile_index_dex_file_;
// List of compiled methods, later to be sorted by order defined in OrderedMethodData.
// Methods can be inserted more than once in case of duplicated methods.
OrderedMethodList ordered_methods_;
};
// Given a method order, reserve the offsets for each CompiledMethod in the OAT file.
class OatWriter::LayoutReserveOffsetCodeMethodVisitor : public OrderedMethodVisitor {
public:
LayoutReserveOffsetCodeMethodVisitor(OatWriter* writer,
size_t offset,
OrderedMethodList ordered_methods)
: LayoutReserveOffsetCodeMethodVisitor(writer,
offset,
writer->GetCompilerOptions(),
std::move(ordered_methods)) {
}
bool VisitComplete() override {
offset_ = writer_->relative_patcher_->ReserveSpaceEnd(offset_);
if (generate_debug_info_) {
std::vector<debug::MethodDebugInfo> thunk_infos =
relative_patcher_->GenerateThunkDebugInfo(executable_offset_);
writer_->method_info_.insert(writer_->method_info_.end(),
std::make_move_iterator(thunk_infos.begin()),
std::make_move_iterator(thunk_infos.end()));
}
return true;
}
bool VisitMethod(const OrderedMethodData& method_data) override
REQUIRES_SHARED(Locks::mutator_lock_) {
OatClass* oat_class = method_data.oat_class;
CompiledMethod* compiled_method = method_data.compiled_method;
const MethodReference& method_ref = method_data.method_reference;
uint16_t method_offsets_index_ = method_data.method_offsets_index;
size_t class_def_index = method_data.class_def_index;
uint32_t access_flags = method_data.access_flags;
bool has_debug_info = method_data.HasDebugInfo();
size_t debug_info_idx = method_data.debug_info_idx;
DCHECK(HasCompiledCode(compiled_method)) << method_ref.PrettyMethod();
// 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->GetEntryPointAdjustment();
// Deduplicate code arrays if we are not producing debuggable code.
bool deduped = true;
if (debuggable_) {
quick_code_offset = 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, method_ref, thumb_offset);
deduped = false;
}
} else {
quick_code_offset = dedupe_map_.GetOrCreate(
compiled_method,
[this, &deduped, compiled_method, &method_ref, thumb_offset]() {
deduped = false;
return NewQuickCodeOffset(compiled_method, method_ref, thumb_offset);
});
}
if (code_size != 0) {
if (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.index)
<< " offsets " << relative_patcher_->GetOffset(method_ref)
<< " " << quick_code_offset;
} else {
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 code_info_offset = method_header->GetCodeInfoOffset();
uint32_t code_offset = quick_code_offset - thumb_offset;
CHECK(!compiled_method->GetQuickCode().empty());
// If the code is compiled, we write the offset of the stack map relative
// to the code. The offset was previously stored relative to start of file.
if (code_info_offset != 0u) {
DCHECK_LT(code_info_offset, code_offset);
code_info_offset = code_offset - code_info_offset;
}
*method_header = OatQuickMethodHeader(code_info_offset);
if (!deduped) {
// Update offsets. (Checksum is updated when writing.)
offset_ += sizeof(*method_header); // Method header is prepended before code.
offset_ += code_size;
}
// Exclude quickened dex methods (code_size == 0) since they have no native code.
if (generate_debug_info_ && code_size != 0) {
DCHECK(has_debug_info);
const uint8_t* code_info = compiled_method->GetVmapTable().data();
DCHECK(code_info != nullptr);
// Record debug information for this function if we are doing that.
debug::MethodDebugInfo& info = writer_->method_info_[debug_info_idx];
// Simpleperf relies on art_jni_trampoline to detect jni methods.
info.custom_name = (access_flags & kAccNative) ? "art_jni_trampoline" : "";
info.dex_file = method_ref.dex_file;
info.class_def_index = class_def_index;
info.dex_method_index = method_ref.index;
info.access_flags = access_flags;
// For intrinsics emitted by codegen, the code has no relation to the original code item.
info.code_item = compiled_method->IsIntrinsic() ? nullptr : method_data.code_item;
info.isa = compiled_method->GetInstructionSet();
info.deduped = deduped;
info.is_native_debuggable = native_debuggable_;
info.is_optimized = method_header->IsOptimized();
info.is_code_address_text_relative = true;
info.code_address = code_offset - executable_offset_;
info.code_size = code_size;
info.frame_size_in_bytes = CodeInfo::DecodeFrameInfo(code_info).FrameSizeInBytes();
info.code_info = code_info;
info.cfi = compiled_method->GetCFIInfo();
} else {
DCHECK(!has_debug_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;
return true;
}
size_t GetOffset() const {
return offset_;
}
private:
LayoutReserveOffsetCodeMethodVisitor(OatWriter* writer,
size_t offset,
const CompilerOptions& compiler_options,
OrderedMethodList ordered_methods)
: OrderedMethodVisitor(std::move(ordered_methods)),
writer_(writer),
offset_(offset),
relative_patcher_(writer->relative_patcher_),
executable_offset_(writer->oat_header_->GetExecutableOffset()),
debuggable_(compiler_options.GetDebuggable()),
native_debuggable_(compiler_options.GetNativeDebuggable()),
generate_debug_info_(compiler_options.GenerateAnyDebugInfo()) {}
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->GetPatches().data() != rhs->GetPatches().data())) {
return lhs->GetPatches().data() < rhs->GetPatches().data();
}
if (UNLIKELY(lhs->IsIntrinsic() != rhs->IsIntrinsic())) {
return rhs->IsIntrinsic();
}
return false;
}
};
uint32_t NewQuickCodeOffset(CompiledMethod* compiled_method,
const MethodReference& method_ref,
uint32_t thumb_offset) {
offset_ = relative_patcher_->ReserveSpace(offset_, compiled_method, method_ref);
offset_ += CodeAlignmentSize(offset_, *compiled_method);
DCHECK_ALIGNED_PARAM(offset_ + sizeof(OatQuickMethodHeader),
GetInstructionSetCodeAlignment(compiled_method->GetInstructionSet()));
return offset_ + sizeof(OatQuickMethodHeader) + thumb_offset;
}
OatWriter* writer_;
// Offset of the code of the compiled methods.
size_t 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 writer_'s members and compiler options.
MultiOatRelativePatcher* relative_patcher_;
uint32_t executable_offset_;
const bool debuggable_;
const bool native_debuggable_;
const bool generate_debug_info_;
};
template <bool kDeduplicate>
class OatWriter::InitMapMethodVisitor : public OatDexMethodVisitor {
public:
InitMapMethodVisitor(OatWriter* writer, size_t offset)
: OatDexMethodVisitor(writer, offset),
dedupe_bit_table_(&writer_->code_info_data_) {
if (kDeduplicate) {
// Reserve large buffers for `CodeInfo` and bit table deduplication except for
// multi-image compilation as we do not want to reserve multiple large buffers.
// User devices should not do any multi-image compilation.
const CompilerOptions& compiler_options = writer->GetCompilerOptions();
DCHECK(compiler_options.IsAnyCompilationEnabled());
if (compiler_options.DeduplicateCode() && !compiler_options.IsMultiImage()) {
size_t unique_code_infos =
writer->compiler_driver_->GetCompiledMethodStorage()->UniqueVMapTableEntries();
dedupe_code_info_.reserve(unique_code_infos);
dedupe_bit_table_.ReserveDedupeBuffer(unique_code_infos);
}
}
}
bool VisitMethod(size_t class_def_method_index,
[[maybe_unused]] const ClassAccessor::Method& method) 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_].GetCodeInfoOffset(), 0u);
ArrayRef<const uint8_t> map = compiled_method->GetVmapTable();
if (map.size() != 0u) {
size_t offset = offset_ + writer_->code_info_data_.size();
if (kDeduplicate) {
auto [it, inserted] = dedupe_code_info_.insert(std::make_pair(map.data(), offset));
DCHECK_EQ(inserted, it->second == offset);
if (inserted) {
size_t dedupe_bit_table_offset = dedupe_bit_table_.Dedupe(map.data());
DCHECK_EQ(offset, offset_ + dedupe_bit_table_offset);
} else {
offset = it->second;
}
} else {
writer_->code_info_data_.insert(writer_->code_info_data_.end(), map.begin(), map.end());
}
// Code offset is not initialized yet, so set file offset for now.
DCHECK_EQ(oat_class->method_offsets_[method_offsets_index_].code_offset_, 0u);
oat_class->method_headers_[method_offsets_index_].SetCodeInfoOffset(offset);
}
++method_offsets_index_;
}
return true;
}
private:
// Deduplicate at CodeInfo level. The value is byte offset within code_info_data_.
// This deduplicates the whole CodeInfo object without going into the inner tables.
// The compiler already deduplicated the pointers but it did not dedupe the tables.
HashMap<const uint8_t*, size_t> dedupe_code_info_;
// Deduplicate at BitTable level.
CodeInfoTableDeduper dedupe_bit_table_;
};
class OatWriter::InitImageMethodVisitor final : public OatDexMethodVisitor {
public:
InitImageMethodVisitor(OatWriter* writer,
size_t offset,
const std::vector<const DexFile*>* dex_files)
REQUIRES_SHARED(Locks::mutator_lock_)
: OatDexMethodVisitor(writer, offset),
pointer_size_(GetInstructionSetPointerSize(writer_->compiler_options_.GetInstructionSet())),
class_loader_(writer->image_writer_->GetAppClassLoader()),
dex_files_(dex_files),
class_linker_(Runtime::Current()->GetClassLinker()),
dex_cache_dex_file_(nullptr),
dex_cache_(nullptr),
klass_(nullptr) {}
// 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) final
REQUIRES_SHARED(Locks::mutator_lock_) {
OatDexMethodVisitor::StartClass(dex_file, class_def_index);
// Skip classes that are not in the image.
const dex::TypeId& type_id =
dex_file_->GetTypeId(dex_file->GetClassDef(class_def_index).class_idx_);
const char* class_descriptor = dex_file->GetTypeDescriptor(type_id);
if (!writer_->GetCompilerOptions().IsImageClass(class_descriptor)) {
klass_ = nullptr;
return true;
}
if (UNLIKELY(dex_file != dex_cache_dex_file_)) {
dex_cache_ = class_linker_->FindDexCache(Thread::Current(), *dex_file);
DCHECK(dex_cache_ != nullptr);
DCHECK(dex_cache_->GetDexFile() == dex_file);
dex_cache_dex_file_ = dex_file;
}
const dex::ClassDef& class_def = dex_file->GetClassDef(class_def_index);
klass_ = class_linker_->LookupResolvedType(class_def.class_idx_, dex_cache_, class_loader_);
if (klass_ != nullptr) {
if (UNLIKELY(klass_->GetDexCache() != dex_cache_)) {
klass_ = nullptr; // This class definition is hidden by another dex file.
return true;
}
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.
ObjPtr<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 ClassAccessor::Method& method) final
REQUIRES_SHARED(Locks::mutator_lock_) {
// Skip methods that are not in the image.
if (klass_ == nullptr) {
return true;
}
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());
OatMethodOffsets offsets = oat_class->method_offsets_[method_offsets_index_];
++method_offsets_index_;
// Do not try to use the `DexCache` via `ClassLinker::LookupResolvedMethod()`.
// As we're going over all methods, `DexCache` entries would be quickly evicted
// and we do not want the overhead of `hiddenapi` checks in the slow-path call
// to `ClassLinker::FindResolvedMethod()` for a method that we have compiled.
ArtMethod* resolved_method = klass_->IsInterface()
? klass_->FindInterfaceMethod(dex_cache_, method.GetIndex(), pointer_size_)
: klass_->FindClassMethod(dex_cache_, method.GetIndex(), pointer_size_);
DCHECK(resolved_method != nullptr);
resolved_method->SetEntryPointFromQuickCompiledCodePtrSize(
reinterpret_cast<void*>(offsets.code_offset_), pointer_size_);
}
return true;
}
// 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() REQUIRES_SHARED(Locks::mutator_lock_) {
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_;
const ObjPtr<mirror::ClassLoader> class_loader_;
const std::vector<const DexFile*>* dex_files_;
ClassLinker* const class_linker_;
const DexFile* dex_cache_dex_file_; // Updated in `StartClass()`.
ObjPtr<mirror::DexCache> dex_cache_; // Updated in `StartClass()`.
ObjPtr<mirror::Class> klass_; // Updated in `StartClass()`.
std::vector<std::pair<ArtMethod*, ArtMethod*>> methods_to_process_;
};
class OatWriter::WriteCodeMethodVisitor : public OrderedMethodVisitor {
public:
WriteCodeMethodVisitor(OatWriter* writer,
OutputStream* out,
const size_t file_offset,
size_t relative_offset,
OrderedMethodList ordered_methods)
: OrderedMethodVisitor(std::move(ordered_methods)),
writer_(writer),
offset_(relative_offset),
dex_file_(nullptr),
pointer_size_(GetInstructionSetPointerSize(writer_->compiler_options_.GetInstructionSet())),
class_loader_(writer->HasImage() ? writer->image_writer_->GetAppClassLoader() : nullptr),
out_(out),
file_offset_(file_offset),
class_linker_(Runtime::Current()->GetClassLinker()),
dex_cache_(nullptr),
no_thread_suspension_("OatWriter patching") {
patched_code_.reserve(16 * KB);
if (writer_->GetCompilerOptions().IsBootImage() ||
writer_->GetCompilerOptions().IsBootImageExtension()) {
// If we're creating the image, the address space must be ready so that we can apply patches.
CHECK(writer_->image_writer_->IsImageAddressSpaceReady());
}
}
bool VisitStart() override {
return true;
}
void UpdateDexFileAndDexCache(const DexFile* dex_file)
REQUIRES_SHARED(Locks::mutator_lock_) {
dex_file_ = dex_file;
// Ordered method visiting is only for compiled methods.
DCHECK(writer_->MayHaveCompiledMethods());
if (writer_->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);
}
}
}
bool VisitComplete() override {
offset_ = writer_->relative_patcher_->WriteThunks(out_, offset_);
if (UNLIKELY(offset_ == 0u)) {
PLOG(ERROR) << "Failed to write final relative call thunks";
return false;
}
return true;
}
bool VisitMethod(const OrderedMethodData& method_data) override
REQUIRES_SHARED(Locks::mutator_lock_) {
const MethodReference& method_ref = method_data.method_reference;
UpdateDexFileAndDexCache(method_ref.dex_file);
OatClass* oat_class = method_data.oat_class;
CompiledMethod* compiled_method = method_data.compiled_method;
uint16_t method_offsets_index = method_data.method_offsets_index;
// No thread suspension since dex_cache_ that may get invalidated if that occurs.
ScopedAssertNoThreadSuspension tsc(__FUNCTION__);
DCHECK(HasCompiledCode(compiled_method)) << method_ref.PrettyMethod();
// TODO: cleanup DCHECK_OFFSET_ to accept file_offset as parameter.
size_t file_offset = file_offset_; // Used by DCHECK_OFFSET_ macro.
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", method_ref);
return false;
}
uint32_t alignment_size = CodeAlignmentSize(offset_, *compiled_method);
if (alignment_size != 0) {
if (!writer_->WriteCodeAlignment(out, alignment_size)) {
ReportWriteFailure("code alignment padding", method_ref);
return false;
}
offset_ += alignment_size;
DCHECK_OFFSET_();
}
DCHECK_ALIGNED_PARAM(offset_ + sizeof(OatQuickMethodHeader),
GetInstructionSetCodeAlignment(compiled_method->GetInstructionSet()));
DCHECK_EQ(
method_offsets.code_offset_,
offset_ + sizeof(OatQuickMethodHeader) + compiled_method->GetEntryPointAdjustment())
<< dex_file_->PrettyMethod(method_ref.index);
const OatQuickMethodHeader& method_header =
oat_class->method_headers_[method_offsets_index];
if (!out->WriteFully(&method_header, sizeof(method_header))) {
ReportWriteFailure("method header", method_ref);
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::kIntrinsicReference: {
uint32_t target_offset = GetTargetIntrinsicReferenceOffset(patch);
writer_->relative_patcher_->PatchPcRelativeReference(&patched_code_,
patch,
offset_ + literal_offset,
target_offset);
break;
}
case LinkerPatch::Type::kDataBimgRelRo: {
uint32_t target_offset =
writer_->data_bimg_rel_ro_start_ +
writer_->data_bimg_rel_ro_entries_.Get(patch.BootImageOffset());
writer_->relative_patcher_->PatchPcRelativeReference(&patched_code_,
patch,
offset_ + literal_offset,
target_offset);
break;
}
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::kPublicTypeBssEntry: {
TypeReference ref(patch.TargetTypeDexFile(), patch.TargetTypeIndex());
uint32_t target_offset =
writer_->bss_start_ + writer_->bss_public_type_entries_.Get(ref);
writer_->relative_patcher_->PatchPcRelativeReference(&patched_code_,
patch,
offset_ + literal_offset,
target_offset);
break;
}
case LinkerPatch::Type::kPackageTypeBssEntry: {
TypeReference ref(patch.TargetTypeDexFile(), patch.TargetTypeIndex());
uint32_t target_offset =
writer_->bss_start_ + writer_->bss_package_type_entries_.Get(ref);
writer_->relative_patcher_->PatchPcRelativeReference(&patched_code_,
patch,
offset_ + 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::kJniEntrypointRelative: {
DCHECK(GetTargetMethod(patch)->IsNative());
uint32_t target_offset =
GetTargetMethodOffset(GetTargetMethod(patch)) +
ArtMethod::EntryPointFromJniOffset(pointer_size_).Uint32Value();
writer_->relative_patcher_->PatchPcRelativeReference(&patched_code_,
patch,
offset_ + literal_offset,
target_offset);
break;
}
case LinkerPatch::Type::kCallEntrypoint: {
writer_->relative_patcher_->PatchEntrypointCall(&patched_code_,
patch,
offset_ + literal_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", method_ref);
return false;
}
writer_->size_code_ += code_size;
offset_ += code_size;
}
DCHECK_OFFSET_();
return true;
}
size_t GetOffset() const {
return offset_;
}
private:
OatWriter* const writer_;
// Updated in VisitMethod as methods are written out.
size_t offset_;
// Potentially varies with every different VisitMethod.
// Used to determine which DexCache to use when finding ArtMethods.
const DexFile* dex_file_;
// Pointer size we are compiling to.
const PointerSize pointer_size_;
// The image writer's classloader, if there is one, else null.
ObjPtr<mirror::ClassLoader> class_loader_;
// Stream to output file, where the OAT code will be written to.
OutputStream* const out_;
const size_t file_offset_;
ClassLinker* const class_linker_;
ObjPtr<mirror::DexCache> dex_cache_;
std::vector<uint8_t> patched_code_;
const ScopedAssertNoThreadSuspension no_thread_suspension_;
void ReportWriteFailure(const char* what, const MethodReference& method_ref) {
PLOG(ERROR) << "Failed to write " << what << " for "
<< method_ref.PrettyMethod() << " 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.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, we need to point to the correct trampoline.
if (UNLIKELY(target_offset == 0)) {
ArtMethod* target = GetTargetMethod(patch);
DCHECK(target != nullptr);
// TODO: Remove kCallRelative? This patch type is currently not in use.
// If we want to use it again, we should make sure that we either use it
// only for target methods that were actually compiled, or call the
// method dispatch thunk. Currently, ARM/ARM64 patchers would emit the
// thunk for far `target_offset` (so we could teach them to use the
// thunk for `target_offset == 0`) but x86/x86-64 patchers do not.
// (When this was originally implemented, every oat file contained
// trampolines, so we could just return their offset here. Now only
// the boot image contains them, so this is not always an option.)
LOG(FATAL) << "The target method was not compiled.";
}
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);
}
ObjPtr<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 =
class_linker_->LookupResolvedType(patch.TargetTypeIndex(), dex_cache, class_loader_);
CHECK(type != nullptr);
return type;
}
ObjPtr<mirror::String> GetTargetString(const LinkerPatch& patch)
REQUIRES_SHARED(Locks::mutator_lock_) {
ClassLinker* linker = Runtime::Current()->GetClassLinker();
ObjPtr<mirror::String> string =
linker->LookupString(patch.TargetStringIndex(), GetDexCache(patch.TargetStringDexFile()));
DCHECK(string != nullptr);
DCHECK(writer_->GetCompilerOptions().IsBootImage() ||
writer_->GetCompilerOptions().IsBootImageExtension());
return string;
}
uint32_t GetTargetIntrinsicReferenceOffset(const LinkerPatch& patch)
REQUIRES_SHARED(Locks::mutator_lock_) {
DCHECK(writer_->GetCompilerOptions().IsBootImage());
const void* address =
writer_->image_writer_->GetIntrinsicReferenceAddress(patch.IntrinsicData());
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>(address) - oat_data_begin);
}
uint32_t GetTargetMethodOffset(ArtMethod* method) REQUIRES_SHARED(Locks::mutator_lock_) {
DCHECK(writer_->GetCompilerOptions().IsBootImage() ||
writer_->GetCompilerOptions().IsBootImageExtension());
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(ObjPtr<mirror::Object> object)
REQUIRES_SHARED(Locks::mutator_lock_) {
DCHECK(writer_->GetCompilerOptions().IsBootImage() ||
writer_->GetCompilerOptions().IsBootImageExtension());
object = writer_->image_writer_->GetImageAddress(object.Ptr());
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.Ptr()) - oat_data_begin);
}
};
// 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_) {
for (ClassAccessor accessor : dex_file->GetClasses()) {
if (UNLIKELY(!visitor->StartClass(dex_file, accessor.GetClassDefIndex()))) {
return false;
}
if (MayHaveCompiledMethods()) {
size_t class_def_method_index = 0u;
for (const ClassAccessor::Method& method : accessor.GetMethods()) {
if (!visitor->VisitMethod(class_def_method_index, method)) {
return false;
}
++class_def_method_index;
}
}
if (UNLIKELY(!visitor->EndClass())) {
return false;
}
}
}
return true;
}
size_t OatWriter::InitOatHeader(uint32_t num_dex_files,
SafeMap<std::string, std::string>* key_value_store) {
TimingLogger::ScopedTiming split("InitOatHeader", timings_);
// Check that oat version when runtime was compiled matches the oat version
// when dex2oat was compiled. We have seen cases where they got out of sync.
constexpr std::array<uint8_t, 4> dex2oat_oat_version = OatHeader::kOatVersion;
OatHeader::CheckOatVersion(dex2oat_oat_version);
oat_header_.reset(OatHeader::Create(GetCompilerOptions().GetInstructionSet(),
GetCompilerOptions().GetInstructionSetFeatures(),
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;
}
if (GetCompilerOptions().DeduplicateCode()) {
InitMapMethodVisitor</*kDeduplicate=*/ true> visitor(this, offset);
bool success = VisitDexMethods(&visitor);
DCHECK(success);
} else {
InitMapMethodVisitor</*kDeduplicate=*/ false> visitor(this, offset);
bool success = VisitDexMethods(&visitor);
DCHECK(success);
}
code_info_data_.shrink_to_fit();
offset += code_info_data_.size();
return offset;
}
template <typename GetBssOffset>
static size_t CalculateNumberOfIndexBssMappingEntries(size_t number_of_indexes,
size_t slot_size,
const BitVector& indexes,
GetBssOffset get_bss_offset) {
IndexBssMappingEncoder encoder(number_of_indexes, slot_size);
size_t number_of_entries = 0u;
bool first_index = true;
for (uint32_t index : indexes.Indexes()) {
uint32_t bss_offset = get_bss_offset(index);
if (first_index || !encoder.TryMerge(index, bss_offset)) {
encoder.Reset(index, bss_offset);
++number_of_entries;
first_index = false;
}
}
DCHECK_NE(number_of_entries, 0u);
return number_of_entries;
}
template <typename GetBssOffset>
static size_t CalculateIndexBssMappingSize(size_t number_of_indexes,
size_t slot_size,
const BitVector& indexes,
GetBssOffset get_bss_offset) {
size_t number_of_entries = CalculateNumberOfIndexBssMappingEntries(number_of_indexes,
slot_size,
indexes,
get_bss_offset);
return IndexBssMapping::ComputeSize(number_of_entries);
}
static size_t CalculateIndexBssMappingSize(
const DexFile* dex_file,
const BitVector& type_indexes,
const SafeMap<TypeReference, size_t, TypeReferenceValueComparator>& bss_entries) {
return CalculateIndexBssMappingSize(
dex_file->NumTypeIds(),
sizeof(GcRoot<mirror::Class>),
type_indexes,
[=](uint32_t index) { return bss_entries.Get({dex_file, dex::TypeIndex(index)}); });
}
size_t OatWriter::InitIndexBssMappings(size_t offset) {
if (bss_method_entry_references_.empty() &&
bss_type_entry_references_.empty() &&
bss_public_type_entry_references_.empty() &&
bss_package_type_entry_references_.empty() &&
bss_string_entry_references_.empty()) {
return offset;
}
// If there are any classes, the class offsets allocation aligns the offset
// and we cannot have any index bss mappings without class offsets.
static_assert(alignof(IndexBssMapping) == 4u, "IndexBssMapping alignment check.");
DCHECK_ALIGNED(offset, 4u);
size_t number_of_method_dex_files = 0u;
size_t number_of_type_dex_files = 0u;
size_t number_of_public_type_dex_files = 0u;
size_t number_of_package_type_dex_files = 0u;
size_t number_of_string_dex_files = 0u;
for (size_t i = 0, size = dex_files_->size(); i != size; ++i) {
const DexFile* dex_file = (*dex_files_)[i];
offset = InitIndexBssMappingsHelper(offset,
dex_file,
number_of_method_dex_files,
number_of_type_dex_files,
number_of_public_type_dex_files,
number_of_package_type_dex_files,
number_of_string_dex_files,
oat_dex_files_[i].method_bss_mapping_offset_,
oat_dex_files_[i].type_bss_mapping_offset_,
oat_dex_files_[i].public_type_bss_mapping_offset_,
oat_dex_files_[i].package_type_bss_mapping_offset_,
oat_dex_files_[i].string_bss_mapping_offset_);
}
if (!(compiler_options_.IsBootImage() || compiler_options_.IsBootImageExtension())) {
ArrayRef<const DexFile* const> boot_class_path(
Runtime::Current()->GetClassLinker()->GetBootClassPath());
// We initialize bcp_bss_info for single image and purposively leave it empty for the multi
// image case.
// Note that we have an early break at the beginning of the method, so `bcp_bss_info_` will also
// be empty in the case of having no mappings at all.
DCHECK(bcp_bss_info_.empty());
bcp_bss_info_.resize(boot_class_path.size());
for (size_t i = 0, size = bcp_bss_info_.size(); i != size; ++i) {
const DexFile* dex_file = boot_class_path[i];
DCHECK(!ContainsElement(*dex_files_, dex_file));
offset = InitIndexBssMappingsHelper(offset,
dex_file,
number_of_method_dex_files,
number_of_type_dex_files,
number_of_public_type_dex_files,
number_of_package_type_dex_files,
number_of_string_dex_files,
bcp_bss_info_[i].method_bss_mapping_offset,
bcp_bss_info_[i].type_bss_mapping_offset,
bcp_bss_info_[i].public_type_bss_mapping_offset,
bcp_bss_info_[i].package_type_bss_mapping_offset,
bcp_bss_info_[i].string_bss_mapping_offset);
}
}
// Check that all dex files targeted by bss entries are in `*dex_files_`, or in the bootclaspath's
// DexFiles in the single image case.
CHECK_EQ(number_of_method_dex_files, bss_method_entry_references_.size());
CHECK_EQ(number_of_type_dex_files, bss_type_entry_references_.size());
CHECK_EQ(number_of_public_type_dex_files, bss_public_type_entry_references_.size());
CHECK_EQ(number_of_package_type_dex_files, bss_package_type_entry_references_.size());
CHECK_EQ(number_of_string_dex_files, bss_string_entry_references_.size());
return offset;
}
size_t OatWriter::InitIndexBssMappingsHelper(size_t offset,
const DexFile* dex_file,
/*inout*/ size_t& number_of_method_dex_files,
/*inout*/ size_t& number_of_type_dex_files,
/*inout*/ size_t& number_of_public_type_dex_files,
/*inout*/ size_t& number_of_package_type_dex_files,
/*inout*/ size_t& number_of_string_dex_files,
/*inout*/ uint32_t& method_bss_mapping_offset,
/*inout*/ uint32_t& type_bss_mapping_offset,
/*inout*/ uint32_t& public_type_bss_mapping_offset,
/*inout*/ uint32_t& package_type_bss_mapping_offset,
/*inout*/ uint32_t& string_bss_mapping_offset) {
const PointerSize pointer_size = GetInstructionSetPointerSize(oat_header_->GetInstructionSet());
auto method_it = bss_method_entry_references_.find(dex_file);
if (method_it != bss_method_entry_references_.end()) {
const BitVector& method_indexes = method_it->second;
++number_of_method_dex_files;
method_bss_mapping_offset = offset;
offset += CalculateIndexBssMappingSize(dex_file->NumMethodIds(),
static_cast<size_t>(pointer_size),
method_indexes,
[=](uint32_t index) {
return bss_method_entries_.Get({dex_file, index});
});
}
auto type_it = bss_type_entry_references_.find(dex_file);
if (type_it != bss_type_entry_references_.end()) {
const BitVector& type_indexes = type_it->second;
++number_of_type_dex_files;
type_bss_mapping_offset = offset;
offset += CalculateIndexBssMappingSize(dex_file, type_indexes, bss_type_entries_);
}
auto public_type_it = bss_public_type_entry_references_.find(dex_file);
if (public_type_it != bss_public_type_entry_references_.end()) {
const BitVector& type_indexes = public_type_it->second;
++number_of_public_type_dex_files;
public_type_bss_mapping_offset = offset;
offset += CalculateIndexBssMappingSize(dex_file, type_indexes, bss_public_type_entries_);
}
auto package_type_it = bss_package_type_entry_references_.find(dex_file);
if (package_type_it != bss_package_type_entry_references_.end()) {
const BitVector& type_indexes = package_type_it->second;
++number_of_package_type_dex_files;
package_type_bss_mapping_offset = offset;
offset += CalculateIndexBssMappingSize(dex_file, type_indexes, bss_package_type_entries_);
}
auto string_it = bss_string_entry_references_.find(dex_file);
if (string_it != bss_string_entry_references_.end()) {
const BitVector& string_indexes = string_it->second;
++number_of_string_dex_files;
string_bss_mapping_offset = offset;
offset += CalculateIndexBssMappingSize(
dex_file->NumStringIds(),
sizeof(GcRoot<mirror::String>),
string_indexes,
[=](uint32_t index) {
return bss_string_entries_.Get({dex_file, dex::StringIndex(index)});
});
}
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::InitBcpBssInfo(size_t offset) {
if (bcp_bss_info_.size() == 0) {
return offset;
}
// We first increase the offset to make room to store the number of BCP DexFiles, if we have at
// least one entry.
oat_header_->SetBcpBssInfoOffset(offset);
offset += sizeof(uint32_t);
for (BssMappingInfo& info : bcp_bss_info_) {
info.offset_ = offset;
offset += BssMappingInfo::SizeOf();
}
return offset;
}
size_t OatWriter::InitOatCode(size_t offset) {
// calculate the offsets within OatHeader to executable code
size_t old_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;
InstructionSet instruction_set = compiler_options_.GetInstructionSet();
if (GetCompilerOptions().IsBootImage() && primary_oat_file_) {
const bool generate_debug_info = GetCompilerOptions().GenerateAnyDebugInfo();
size_t adjusted_offset = offset;
#define DO_TRAMPOLINE(field, fn_name) \
/* Pad with at least four 0xFFs so we can do DCHECKs in OatQuickMethodHeader */ \
offset = CompiledCode::AlignCode(offset + 4, instruction_set); \
adjusted_offset = offset + GetInstructionSetEntryPointAdjustment(instruction_set); \
oat_header_->Set ## fn_name ## Offset(adjusted_offset); \
(field) = compiler_driver_->Create ## fn_name(); \
if (generate_debug_info) { \
debug::MethodDebugInfo info = {}; \
info.custom_name = #fn_name; \
info.isa = instruction_set; \
info.is_code_address_text_relative = true; \
/* Use the code offset rather than the `adjusted_offset`. */ \
info.code_address = offset - oat_header_->GetExecutableOffset(); \
info.code_size = (field)->size(); \
method_info_.push_back(std::move(info)); \
} \
offset += (field)->size();
DO_TRAMPOLINE(jni_dlsym_lookup_trampoline_, JniDlsymLookupTrampoline);
DO_TRAMPOLINE(jni_dlsym_lookup_critical_trampoline_, JniDlsymLookupCriticalTrampoline);
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);
DO_TRAMPOLINE(nterp_trampoline_, NterpTrampoline);
#undef DO_TRAMPOLINE
} else {
oat_header_->SetJniDlsymLookupTrampolineOffset(0);
oat_header_->SetJniDlsymLookupCriticalTrampolineOffset(0);
oat_header_->SetQuickGenericJniTrampolineOffset(0);
oat_header_->SetQuickImtConflictTrampolineOffset(0);
oat_header_->SetQuickResolutionTrampolineOffset(0);
oat_header_->SetQuickToInterpreterBridgeOffset(0);
oat_header_->SetNterpTrampolineOffset(0);
}
return offset;
}
size_t OatWriter::InitOatCodeDexFiles(size_t offset) {
if (!GetCompilerOptions().IsAnyCompilationEnabled()) {
if (kOatWriterDebugOatCodeLayout) {
LOG(INFO) << "InitOatCodeDexFiles: OatWriter("
<< this << "), "
<< "compilation is disabled";
}
return offset;
}
bool success = false;
{
ScopedObjectAccess soa(Thread::Current());
LayoutCodeMethodVisitor layout_code_visitor(this, offset);
success = VisitDexMethods(&layout_code_visitor);
DCHECK(success);
LayoutReserveOffsetCodeMethodVisitor layout_reserve_code_visitor(
this,
offset,
layout_code_visitor.ReleaseOrderedMethods());
success = layout_reserve_code_visitor.Visit();
DCHECK(success);
offset = layout_reserve_code_visitor.GetOffset();
// Save the method order because the WriteCodeMethodVisitor will need this
// order again.
DCHECK(ordered_methods_ == nullptr);
ordered_methods_.reset(
new OrderedMethodList(
layout_reserve_code_visitor.ReleaseOrderedMethods()));
if (kOatWriterDebugOatCodeLayout) {
LOG(INFO) << "IniatOatCodeDexFiles: method order: ";
for (const OrderedMethodData& ordered_method : *ordered_methods_) {
std::string pretty_name = ordered_method.method_reference.PrettyMethod();
LOG(INFO) << pretty_name
<< "@ offset "
<< relative_patcher_->GetOffset(ordered_method.method_reference)
<< " X hotness "
<< ordered_method.hotness_bits;
}
}
}
if (HasImage()) {
ScopedObjectAccess soa(Thread::Current());
ScopedAssertNoThreadSuspension sants("Init image method visitor", Thread::Current());
InitImageMethodVisitor image_visitor(this, offset, dex_files_);
success = VisitDexMethods(&image_visitor);
image_visitor.Postprocess();
DCHECK(success);
offset = image_visitor.GetOffset();
}
return offset;
}
size_t OatWriter::InitDataBimgRelRoLayout(size_t offset) {
DCHECK_EQ(data_bimg_rel_ro_size_, 0u);
if (data_bimg_rel_ro_entries_.empty()) {
// Nothing to put to the .data.bimg.rel.ro section.
return offset;
}
data_bimg_rel_ro_start_ = RoundUp(offset, kPageSize);
for (auto& entry : data_bimg_rel_ro_entries_) {
size_t& entry_offset = entry.second;
entry_offset = data_bimg_rel_ro_size_;
data_bimg_rel_ro_size_ += sizeof(uint32_t);
}
offset = data_bimg_rel_ro_start_ + data_bimg_rel_ro_size_;
return offset;
}
void OatWriter::InitBssLayout(InstructionSet instruction_set) {
{
InitBssLayoutMethodVisitor visitor(this);
bool success = VisitDexMethods(&visitor);
DCHECK(success);
}
DCHECK_EQ(bss_size_, 0u);
if (bss_method_entries_.empty() &&
bss_type_entries_.empty() &&
bss_public_type_entries_.empty() &&
bss_package_type_entries_.empty() &&
bss_string_entries_.empty()) {
// Nothing to put to the .bss section.
return;
}
PointerSize pointer_size = GetInstructionSetPointerSize(instruction_set);
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 public Class entries.
for (auto& entry : bss_public_type_entries_) {
DCHECK_EQ(entry.second, 0u);
entry.second = bss_size_;
bss_size_ += sizeof(GcRoot<mirror::Class>);
}
// Prepare offsets for .bss package Class entries.
for (auto& entry : bss_package_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, this);
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 = WriteIndexBssMappings(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;
}
relative_offset = WriteBcpBssInfo(out, file_offset, relative_offset);
if (relative_offset == 0) {
PLOG(ERROR) << "Failed to write BCP bss 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 false;
}
DCHECK_OFFSET();
write_state_ = WriteState::kWriteText;
return true;
}
void OatWriter::WriteQuickeningInfo([[maybe_unused]] /*out*/ std::vector<uint8_t>*) {
// Nothing to write. Leave `vdex_size_` untouched and unaligned.
vdex_quickening_info_offset_ = vdex_size_;
size_quickening_info_alignment_ = 0;
}
void OatWriter::WriteVerifierDeps(verifier::VerifierDeps* verifier_deps,
/*out*/std::vector<uint8_t>* buffer) {
if (verifier_deps == nullptr) {
// Nothing to write. Record the offset, but no need
// for alignment.
vdex_verifier_deps_offset_ = vdex_size_;
return;
}
TimingLogger::ScopedTiming split("VDEX verifier deps", timings_);
DCHECK(buffer->empty());
verifier_deps->Encode(*dex_files_, buffer);
size_verifier_deps_ = buffer->size();
// Verifier deps data should be 4 byte aligned.
size_verifier_deps_alignment_ = RoundUp(vdex_size_, 4u) - vdex_size_;
buffer->insert(buffer->begin(), size_verifier_deps_alignment_, 0u);
vdex_size_ += size_verifier_deps_alignment_;
vdex_verifier_deps_offset_ = vdex_size_;
vdex_size_ += size_verifier_deps_;
}
bool OatWriter::WriteCode(OutputStream* out) {
CHECK(write_state_ == WriteState::kWriteText);
// Wrap out to update checksum with each write.
ChecksumUpdatingOutputStream checksum_updating_out(out, this);
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;
}
if (data_bimg_rel_ro_size_ != 0u) {
write_state_ = WriteState::kWriteDataBimgRelRo;
} else {
if (!CheckOatSize(out, file_offset, relative_offset)) {
return false;
}
write_state_ = WriteState::kWriteHeader;
}
return true;
}
bool OatWriter::WriteDataBimgRelRo(OutputStream* out) {
CHECK(write_state_ == WriteState::kWriteDataBimgRelRo);
// Wrap out to update checksum with each write.
ChecksumUpdatingOutputStream checksum_updating_out(out, this);
out = &checksum_updating_out;
const size_t file_offset = oat_data_offset_;
size_t relative_offset = data_bimg_rel_ro_start_;
// Record the padding before the .data.bimg.rel.ro section.
// Do not write anything, this zero-filled part was skipped (Seek()) when starting the section.
size_t code_end = GetOatHeader().GetExecutableOffset() + code_size_;
DCHECK_EQ(RoundUp(code_end, kPageSize), relative_offset);
size_t padding_size = relative_offset - code_end;
DCHECK_EQ(size_data_bimg_rel_ro_alignment_, 0u);
size_data_bimg_rel_ro_alignment_ = padding_size;
relative_offset = WriteDataBimgRelRo(out, file_offset, relative_offset);
if (relative_offset == 0) {
LOG(ERROR) << "Failed to write boot image relocations to " << out->GetLocation();
return false;
}
if (!CheckOatSize(out, file_offset, relative_offset)) {
return false;
}
write_state_ = WriteState::kWriteHeader;
return true;
}
bool OatWriter::CheckOatSize(OutputStream* out, size_t file_offset, size_t relative_offset) {
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_quickening_table_offset_);
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_vdex_lookup_table_);
DO_STAT(size_vdex_lookup_table_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_trampoline_);
DO_STAT(size_jni_dlsym_lookup_critical_trampoline_);
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_nterp_trampoline_);
DO_STAT(size_trampoline_alignment_);
DO_STAT(size_method_header_);
DO_STAT(size_code_);
DO_STAT(size_code_alignment_);
DO_STAT(size_data_bimg_rel_ro_);
DO_STAT(size_data_bimg_rel_ro_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_dex_file_type_bss_mapping_offset_);
DO_STAT(size_oat_dex_file_public_type_bss_mapping_offset_);
DO_STAT(size_oat_dex_file_package_type_bss_mapping_offset_);
DO_STAT(size_oat_dex_file_string_bss_mapping_offset_);
DO_STAT(size_bcp_bss_info_size_);
DO_STAT(size_bcp_bss_info_method_bss_mapping_offset_);
DO_STAT(size_bcp_bss_info_type_bss_mapping_offset_);
DO_STAT(size_bcp_bss_info_public_type_bss_mapping_offset_);
DO_STAT(size_bcp_bss_info_package_type_bss_mapping_offset_);
DO_STAT(size_bcp_bss_info_string_bss_mapping_offset_);
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_num_methods_);
DO_STAT(size_oat_class_method_bitmaps_);
DO_STAT(size_oat_class_method_offsets_);
DO_STAT(size_method_bss_mappings_);
DO_STAT(size_type_bss_mappings_);
DO_STAT(size_public_type_bss_mappings_);
DO_STAT(size_package_type_bss_mappings_);
DO_STAT(size_string_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) {
CHECK(write_state_ == WriteState::kWriteHeader);
// Update checksum with header data.
DCHECK_EQ(oat_header_->GetChecksum(), 0u); // For checksum calculation.
const uint8_t* header_begin = reinterpret_cast<const uint8_t*>(oat_header_.get());
const uint8_t* header_end = oat_header_->GetKeyValueStore() + oat_header_->GetKeyValueStoreSize();
uint32_t old_checksum = oat_checksum_;
oat_checksum_ = adler32(old_checksum, header_begin, header_end - header_begin);
oat_header_->SetChecksum(oat_checksum_);
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) {
{
if (UNLIKELY(!out->WriteFully(code_info_data_.data(), code_info_data_.size()))) {
return 0;
}
relative_offset += code_info_data_.size();
size_vmap_table_ = code_info_data_.size();
DCHECK_OFFSET();
}
return relative_offset;
}
template <typename GetBssOffset>
size_t WriteIndexBssMapping(OutputStream* out,
size_t number_of_indexes,
size_t slot_size,
const BitVector& indexes,
GetBssOffset get_bss_offset) {
// Allocate the IndexBssMapping.
size_t number_of_entries = CalculateNumberOfIndexBssMappingEntries(
number_of_indexes, slot_size, indexes, get_bss_offset);
size_t mappings_size = IndexBssMapping::ComputeSize(number_of_entries);
DCHECK_ALIGNED(mappings_size, sizeof(uint32_t));
std::unique_ptr<uint32_t[]> storage(new uint32_t[mappings_size / sizeof(uint32_t)]);
IndexBssMapping* mappings = new(storage.get()) IndexBssMapping(number_of_entries);
mappings->ClearPadding();
// Encode the IndexBssMapping.
IndexBssMappingEncoder encoder(number_of_indexes, slot_size);
auto init_it = mappings->begin();
bool first_index = true;
for (uint32_t index : indexes.Indexes()) {
size_t bss_offset = get_bss_offset(index);
if (first_index) {
first_index = false;
encoder.Reset(index, bss_offset);
} else if (!encoder.TryMerge(index, bss_offset)) {
*init_it = encoder.GetEntry();
++init_it;
encoder.Reset(index, bss_offset);
}
}
// Store the last entry.
*init_it = encoder.GetEntry();
++init_it;
DCHECK(init_it == mappings->end());
if (!out->WriteFully(storage.get(), mappings_size)) {
return 0u;
}
return mappings_size;
}
size_t WriteIndexBssMapping(
OutputStream* out,
const DexFile* dex_file,
const BitVector& type_indexes,
const SafeMap<TypeReference, size_t, TypeReferenceValueComparator>& bss_entries) {
return WriteIndexBssMapping(
out,
dex_file->NumTypeIds(),
sizeof(GcRoot<mirror::Class>),
type_indexes,
[=](uint32_t index) { return bss_entries.Get({dex_file, dex::TypeIndex(index)}); });
}
size_t OatWriter::WriteIndexBssMappingsHelper(OutputStream* out,
size_t file_offset,
size_t relative_offset,
const DexFile* dex_file,
uint32_t method_bss_mapping_offset,
uint32_t type_bss_mapping_offset,
uint32_t public_type_bss_mapping_offset,
uint32_t package_type_bss_mapping_offset,
uint32_t string_bss_mapping_offset) {
const PointerSize pointer_size = GetInstructionSetPointerSize(oat_header_->GetInstructionSet());
auto method_it = bss_method_entry_references_.find(dex_file);
if (method_it != bss_method_entry_references_.end()) {
const BitVector& method_indexes = method_it->second;
DCHECK_EQ(relative_offset, method_bss_mapping_offset);
DCHECK_OFFSET();
size_t method_mappings_size =
WriteIndexBssMapping(out,
dex_file->NumMethodIds(),
static_cast<size_t>(pointer_size),
method_indexes,
[=](uint32_t index) {
return bss_method_entries_.Get({dex_file, index});
});
if (method_mappings_size == 0u) {
return 0u;
}
size_method_bss_mappings_ += method_mappings_size;
relative_offset += method_mappings_size;
} else {
DCHECK_EQ(0u, method_bss_mapping_offset);
}
auto type_it = bss_type_entry_references_.find(dex_file);
if (type_it != bss_type_entry_references_.end()) {
const BitVector& type_indexes = type_it->second;
DCHECK_EQ(relative_offset, type_bss_mapping_offset);
DCHECK_OFFSET();
size_t type_mappings_size =
WriteIndexBssMapping(out, dex_file, type_indexes, bss_type_entries_);
if (type_mappings_size == 0u) {
return 0u;
}
size_type_bss_mappings_ += type_mappings_size;
relative_offset += type_mappings_size;
} else {
DCHECK_EQ(0u, type_bss_mapping_offset);
}
auto public_type_it = bss_public_type_entry_references_.find(dex_file);
if (public_type_it != bss_public_type_entry_references_.end()) {
const BitVector& type_indexes = public_type_it->second;
DCHECK_EQ(relative_offset, public_type_bss_mapping_offset);
DCHECK_OFFSET();
size_t public_type_mappings_size =
WriteIndexBssMapping(out, dex_file, type_indexes, bss_public_type_entries_);
if (public_type_mappings_size == 0u) {
return 0u;
}
size_public_type_bss_mappings_ += public_type_mappings_size;
relative_offset += public_type_mappings_size;
} else {
DCHECK_EQ(0u, public_type_bss_mapping_offset);
}
auto package_type_it = bss_package_type_entry_references_.find(dex_file);
if (package_type_it != bss_package_type_entry_references_.end()) {
const BitVector& type_indexes = package_type_it->second;
DCHECK_EQ(relative_offset, package_type_bss_mapping_offset);
DCHECK_OFFSET();
size_t package_type_mappings_size =
WriteIndexBssMapping(out, dex_file, type_indexes, bss_package_type_entries_);
if (package_type_mappings_size == 0u) {
return 0u;
}
size_package_type_bss_mappings_ += package_type_mappings_size;
relative_offset += package_type_mappings_size;
} else {
DCHECK_EQ(0u, package_type_bss_mapping_offset);
}
auto string_it = bss_string_entry_references_.find(dex_file);
if (string_it != bss_string_entry_references_.end()) {
const BitVector& string_indexes = string_it->second;
DCHECK_EQ(relative_offset, string_bss_mapping_offset);
DCHECK_OFFSET();
size_t string_mappings_size =
WriteIndexBssMapping(out,
dex_file->NumStringIds(),
sizeof(GcRoot<mirror::String>),
string_indexes,
[=](uint32_t index) {
return bss_string_entries_.Get({dex_file, dex::StringIndex(index)});
});
if (string_mappings_size == 0u) {
return 0u;
}
size_string_bss_mappings_ += string_mappings_size;
relative_offset += string_mappings_size;
} else {
DCHECK_EQ(0u, string_bss_mapping_offset);
}
return relative_offset;
}
size_t OatWriter::WriteIndexBssMappings(OutputStream* out,
size_t file_offset,
size_t relative_offset) {
TimingLogger::ScopedTiming split("WriteMethodBssMappings", timings_);
if (bss_method_entry_references_.empty() &&
bss_type_entry_references_.empty() &&
bss_public_type_entry_references_.empty() &&
bss_package_type_entry_references_.empty() &&
bss_string_entry_references_.empty()) {
return relative_offset;
}
// 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(IndexBssMapping) == sizeof(uint32_t), "IndexBssMapping alignment check.");
DCHECK_ALIGNED(relative_offset, sizeof(uint32_t));
for (size_t i = 0, size = dex_files_->size(); i != size; ++i) {
const DexFile* dex_file = (*dex_files_)[i];
OatDexFile* oat_dex_file = &oat_dex_files_[i];
relative_offset = WriteIndexBssMappingsHelper(out,
file_offset,
relative_offset,
dex_file,
oat_dex_file->method_bss_mapping_offset_,
oat_dex_file->type_bss_mapping_offset_,
oat_dex_file->public_type_bss_mapping_offset_,
oat_dex_file->package_type_bss_mapping_offset_,
oat_dex_file->string_bss_mapping_offset_);
if (relative_offset == 0u) {
return 0u;
}
}
if (!(compiler_options_.IsBootImage() || compiler_options_.IsBootImageExtension())) {
ArrayRef<const DexFile* const> boot_class_path(
Runtime::Current()->GetClassLinker()->GetBootClassPath());
for (size_t i = 0, size = bcp_bss_info_.size(); i != size; ++i) {
const DexFile* dex_file = boot_class_path[i];
DCHECK(!ContainsElement(*dex_files_, dex_file));
relative_offset =
WriteIndexBssMappingsHelper(out,
file_offset,
relative_offset,
dex_file,
bcp_bss_info_[i].method_bss_mapping_offset,
bcp_bss_info_[i].type_bss_mapping_offset,
bcp_bss_info_[i].public_type_bss_mapping_offset,
bcp_bss_info_[i].package_type_bss_mapping_offset,
bcp_bss_info_[i].string_bss_mapping_offset);
if (relative_offset == 0u) {
return 0u;
}
}
}
return relative_offset;
}
size_t OatWriter::WriteOatDexFiles(OutputStream* out, size_t file_offset, size_t relative_offset) {
TimingLogger::ScopedTiming split("WriteOatDexFiles", timings_);
for (size_t i = 0, size = oat_dex_files_.size(); i != size; ++i) {
OatDexFile* oat_dex_file = &oat_dex_files_[i];
DCHECK_EQ(relative_offset, oat_dex_file->offset_);
DCHECK_OFFSET();
// Write OatDexFile.
if (!oat_dex_file->Write(this, out)) {
return 0u;
}
relative_offset += oat_dex_file->SizeOf();
}
return relative_offset;
}
size_t OatWriter::WriteBcpBssInfo(OutputStream* out, size_t file_offset, size_t relative_offset) {
TimingLogger::ScopedTiming split("WriteBcpBssInfo", timings_);
const uint32_t number_of_bcp_dexfiles = bcp_bss_info_.size();
// We skip adding the number of DexFiles if we have no .bss mappings.
if (number_of_bcp_dexfiles == 0) {
return relative_offset;
}
if (!out->WriteFully(&number_of_bcp_dexfiles, sizeof(number_of_bcp_dexfiles))) {
PLOG(ERROR) << "Failed to write the number of BCP dexfiles to " << out->GetLocation();
return false;
}
size_bcp_bss_info_size_ = sizeof(number_of_bcp_dexfiles);
relative_offset += size_bcp_bss_info_size_;
for (size_t i = 0, size = number_of_bcp_dexfiles; i != size; ++i) {
DCHECK_EQ(relative_offset, bcp_bss_info_[i].offset_);
DCHECK_OFFSET();
if (!bcp_bss_info_[i].Write(this, out)) {
return 0u;
}
relative_offset += BssMappingInfo::SizeOf();
}
return relative_offset;
}
size_t OatWriter::WriteCode(OutputStream* out, size_t file_offset, size_t relative_offset) {
InstructionSet instruction_set = compiler_options_.GetInstructionSet();
if (GetCompilerOptions().IsBootImage() && primary_oat_file_) {
#define DO_TRAMPOLINE(field) \
do { \
/* Pad with at least four 0xFFs so we can do DCHECKs in OatQuickMethodHeader */ \
uint32_t aligned_offset = CompiledCode::AlignCode(relative_offset + 4, instruction_set); \
uint32_t alignment_padding = aligned_offset - relative_offset; \
for (size_t i = 0; i < alignment_padding; i++) { \
uint8_t padding = 0xFF; \
out->WriteFully(&padding, 1); \
} \
size_trampoline_alignment_ += alignment_padding; \
if (!out->WriteFully((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_trampoline_);
DO_TRAMPOLINE(jni_dlsym_lookup_critical_trampoline_);
DO_TRAMPOLINE(quick_generic_jni_trampoline_);
DO_TRAMPOLINE(quick_imt_conflict_trampoline_);
DO_TRAMPOLINE(quick_resolution_trampoline_);
DO_TRAMPOLINE(quick_to_interpreter_bridge_);
DO_TRAMPOLINE(nterp_trampoline_);
#undef DO_TRAMPOLINE
}
return relative_offset;
}
size_t OatWriter::WriteCodeDexFiles(OutputStream* out,
size_t file_offset,
size_t relative_offset) {
if (!GetCompilerOptions().IsAnyCompilationEnabled()) {
// As with InitOatCodeDexFiles, also skip the writer if
// compilation was disabled.
if (kOatWriterDebugOatCodeLayout) {
LOG(INFO) << "WriteCodeDexFiles: OatWriter("
<< this << "), "
<< "compilation is disabled";
}
return relative_offset;
}
ScopedObjectAccess soa(Thread::Current());
DCHECK(ordered_methods_ != nullptr);
std::unique_ptr<OrderedMethodList> ordered_methods_ptr =
std::move(ordered_methods_);
WriteCodeMethodVisitor visitor(this,
out,
file_offset,
relative_offset,
std::move(*ordered_methods_ptr));
if (UNLIKELY(!visitor.Visit())) {
return 0;
}
relative_offset = visitor.GetOffset();
size_code_alignment_ += relative_patcher_->CodeAlignmentSize();
size_relative_call_thunks_ += relative_patcher_->RelativeCallThunksSize();
size_misc_thunks_ += relative_patcher_->MiscThunksSize();
return relative_offset;
}
size_t OatWriter::WriteDataBimgRelRo(OutputStream* out,
size_t file_offset,
size_t relative_offset) {
if (data_bimg_rel_ro_entries_.empty()) {
return relative_offset;
}
// Write the entire .data.bimg.rel.ro with a single WriteFully().
std::vector<uint32_t> data;
data.reserve(data_bimg_rel_ro_entries_.size());
for (const auto& entry : data_bimg_rel_ro_entries_) {
uint32_t boot_image_offset = entry.first;
data.push_back(boot_image_offset);
}
DCHECK_EQ(data.size(), data_bimg_rel_ro_entries_.size());
DCHECK_OFFSET();
if (!out->WriteFully(data.data(), data.size() * sizeof(data[0]))) {
PLOG(ERROR) << "Failed to write .data.bimg.rel.ro in " << out->GetLocation();
return 0u;
}
DCHECK_EQ(size_data_bimg_rel_ro_, 0u);
size_data_bimg_rel_ro_ = data.size() * sizeof(data[0]);
relative_offset += size_data_bimg_rel_ro_;
return relative_offset;
}
bool OatWriter::RecordOatDataOffset(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::WriteDexFiles(File* file,
bool verify,
bool use_existing_vdex,
CopyOption copy_dex_files,
/*out*/ std::vector<MemMap>* opened_dex_files_map) {
TimingLogger::ScopedTiming split("Write Dex files", timings_);
// If extraction is enabled, only do it if not all the dex files are aligned and uncompressed.
if (copy_dex_files == CopyOption::kOnlyIfCompressed) {
extract_dex_files_into_vdex_ = false;
for (OatDexFile& oat_dex_file : oat_dex_files_) {
const DexFileContainer* container = oat_dex_file.GetDexFile()->GetContainer();
if (!(container->IsZip() && container->IsFileMap())) {
extract_dex_files_into_vdex_ = true;
break;
}
}
} else if (copy_dex_files == CopyOption::kAlways) {
extract_dex_files_into_vdex_ = true;
} else {
DCHECK(copy_dex_files == CopyOption::kNever);
extract_dex_files_into_vdex_ = false;
}
if (verify) {
TimingLogger::ScopedTiming split2("Verify input Dex files", timings_);
for (OatDexFile& oat_dex_file : oat_dex_files_) {
const DexFile* dex_file = oat_dex_file.GetDexFile();
std::string error_msg;
if (!dex::Verify(dex_file,
dex_file->GetLocation().c_str(),
/*verify_checksum=*/true,
&error_msg)) {
LOG(ERROR) << "Failed to verify " << dex_file->GetLocation() << ": " << error_msg;
return false;
}
}
}
if (extract_dex_files_into_vdex_) {
vdex_dex_files_offset_ = vdex_size_;
// Perform dexlayout if compact dex is enabled. Also see
// Dex2Oat::DoDexLayoutOptimizations.
if (compact_dex_level_ != CompactDexLevel::kCompactDexLevelNone) {
for (OatDexFile& oat_dex_file : oat_dex_files_) {
// use_existing_vdex should not be used with compact dex and layout.
CHECK(!use_existing_vdex)
<< "We should never update the input vdex when doing dexlayout or compact dex";
if (!LayoutDexFile(&oat_dex_file)) {
return false;
}
}
}
// Calculate the total size after the dex files.
size_t vdex_size_with_dex_files = vdex_size_;
for (OatDexFile& oat_dex_file : oat_dex_files_) {
// Dex files are required to be 4 byte aligned.
vdex_size_with_dex_files = RoundUp(vdex_size_with_dex_files, 4u);
// Record offset for the dex file.
oat_dex_file.dex_file_offset_ = vdex_size_with_dex_files;
// Add the size of the dex file.
if (oat_dex_file.dex_file_size_ < sizeof(DexFile::Header)) {
LOG(ERROR) << "Dex file " << oat_dex_file.GetLocation() << " is too short: "
<< oat_dex_file.dex_file_size_ << " < " << sizeof(DexFile::Header);
return false;
}
vdex_size_with_dex_files += oat_dex_file.dex_file_size_;
}
// Add the shared data section size.
const uint8_t* raw_dex_file_shared_data_begin = nullptr;
uint32_t shared_data_size = 0u;
if (dex_container_ != nullptr) {
shared_data_size = dex_container_->GetDataSection()->Size();
} else {
// Dex files from input vdex are represented as raw dex files and they can be
// compact dex files. These need to specify the same shared data section if any.
for (const OatDexFile& oat_dex_file : oat_dex_files_) {
const DexFile* dex_file = oat_dex_file.GetDexFile();
auto& header = dex_file->GetHeader();
if (!dex_file->IsCompactDexFile() || header.data_size_ == 0u) {
// Non compact dex does not have shared data section.
continue;
}
const uint8_t* cur_data_begin = dex_file->Begin() + header.data_off_;
if (raw_dex_file_shared_data_begin == nullptr) {
raw_dex_file_shared_data_begin = cur_data_begin;
} else if (raw_dex_file_shared_data_begin != cur_data_begin) {
LOG(ERROR) << "Mismatched shared data sections in raw dex files: "
<< static_cast<const void*>(raw_dex_file_shared_data_begin)
<< " != " << static_cast<const void*>(cur_data_begin);
return false;
}
// The different dex files currently can have different data sizes since
// the dex writer writes them one at a time into the shared section.:w
shared_data_size = std::max(shared_data_size, header.data_size_);
}
}
if (shared_data_size != 0u) {
// Shared data section is required to be 4 byte aligned.
vdex_size_with_dex_files = RoundUp(vdex_size_with_dex_files, 4u);
}
vdex_dex_shared_data_offset_ = vdex_size_with_dex_files;
vdex_size_with_dex_files += shared_data_size;
// Extend the file and include the full page at the end as we need to write
// additional data there and do not want to mmap that page twice.
size_t page_aligned_size = RoundUp(vdex_size_with_dex_files, kPageSize);
if (!use_existing_vdex) {
if (file->SetLength(page_aligned_size) != 0) {
PLOG(ERROR) << "Failed to resize vdex file " << file->GetPath();
return false;
}
}
std::string error_msg;
MemMap dex_files_map = MemMap::MapFile(
page_aligned_size,
use_existing_vdex ? PROT_READ : PROT_READ | PROT_WRITE,
MAP_SHARED,
file->Fd(),
/*start=*/ 0u,
/*low_4gb=*/ false,
file->GetPath().c_str(),
&error_msg);
if (!dex_files_map.IsValid()) {
LOG(ERROR) << "Failed to mmap() dex files from oat file. File: " << file->GetPath()
<< " error: " << error_msg;
return false;
}
vdex_begin_ = dex_files_map.Begin();
// Write dex files.
for (OatDexFile& oat_dex_file : oat_dex_files_) {
// Dex files are required to be 4 byte aligned.
size_t old_vdex_size = vdex_size_;
vdex_size_ = RoundUp(vdex_size_, 4u);
size_dex_file_alignment_ += vdex_size_ - old_vdex_size;
// Write the actual dex file.
DCHECK_EQ(vdex_size_, oat_dex_file.dex_file_offset_);
uint8_t* out = vdex_begin_ + oat_dex_file.dex_file_offset_;
const std::vector<uint8_t>& cdex_data = oat_dex_file.cdex_main_section_;
if (!cdex_data.empty()) {
CHECK(!use_existing_vdex);
// Use the compact dex version instead of the original dex file.
DCHECK_EQ(oat_dex_file.dex_file_size_, cdex_data.size());
memcpy(out, cdex_data.data(), cdex_data.size());
} else {
const DexFile* dex_file = oat_dex_file.GetDexFile();
DCHECK_EQ(oat_dex_file.dex_file_size_, dex_file->Size());
if (use_existing_vdex) {
// The vdex already contains the data.
DCHECK_EQ(memcmp(out, dex_file->Begin(), dex_file->Size()), 0);
} else {
memcpy(out, dex_file->Begin(), dex_file->Size());
}
}
// Update current size and account for the written data.
vdex_size_ += oat_dex_file.dex_file_size_;
size_dex_file_ += oat_dex_file.dex_file_size_;
}
// Write shared dex file data section and fix up the dex file headers.
if (shared_data_size != 0u) {
DCHECK_EQ(RoundUp(vdex_size_, 4u), vdex_dex_shared_data_offset_);
if (!use_existing_vdex) {
memset(vdex_begin_ + vdex_size_, 0, vdex_dex_shared_data_offset_ - vdex_size_);
}
size_dex_file_alignment_ += vdex_dex_shared_data_offset_ - vdex_size_;
vdex_size_ = vdex_dex_shared_data_offset_;
if (dex_container_ != nullptr) {
CHECK(!use_existing_vdex) << "Use existing vdex should have empty dex container";
CHECK(compact_dex_level_ != CompactDexLevel::kCompactDexLevelNone);
DexContainer::Section* const section = dex_container_->GetDataSection();
DCHECK_EQ(shared_data_size, section->Size());
memcpy(vdex_begin_ + vdex_size_, section->Begin(), shared_data_size);
section->Clear();
dex_container_.reset();
} else if (!use_existing_vdex) {
memcpy(vdex_begin_ + vdex_size_, raw_dex_file_shared_data_begin, shared_data_size);
}
vdex_size_ += shared_data_size;
size_dex_file_ += shared_data_size;
if (!use_existing_vdex) {
// Fix up the dex headers to have correct offsets to the data section.
for (OatDexFile& oat_dex_file : oat_dex_files_) {
DexFile::Header* header =
reinterpret_cast<DexFile::Header*>(vdex_begin_ + oat_dex_file.dex_file_offset_);
if (!CompactDexFile::IsMagicValid(header->magic_)) {
// Non-compact dex file, probably failed to convert due to duplicate methods.
continue;
}
CHECK_GT(vdex_dex_shared_data_offset_, oat_dex_file.dex_file_offset_);
// Offset is from the dex file base.
header->data_off_ = vdex_dex_shared_data_offset_ - oat_dex_file.dex_file_offset_;
// The size should already be what part of the data buffer may be used by the dex.
CHECK_LE(header->data_size_, shared_data_size);
}
}
}
opened_dex_files_map->push_back(std::move(dex_files_map));
} else {
vdex_dex_shared_data_offset_ = vdex_size_;
}
if (use_existing_vdex) {
// If we re-use an existing vdex, artificially set the verifier deps size,
// so the compiler has a correct computation of the vdex size.
size_t actual_size = file->GetLength();
size_verifier_deps_ = actual_size - vdex_size_;
vdex_size_ = actual_size;
}
return true;
}
void OatWriter::CloseSources() {
for (OatDexFile& oat_dex_file : oat_dex_files_) {
oat_dex_file.dex_file_.reset();
}
}
bool OatWriter::LayoutDexFile(OatDexFile* oat_dex_file) {
TimingLogger::ScopedTiming split("Dex Layout", timings_);
std::string error_msg;
std::string location(oat_dex_file->GetLocation());
std::unique_ptr<const DexFile>& dex_file = oat_dex_file->dex_file_;
Options options;
options.compact_dex_level_ = compact_dex_level_;
options.update_checksum_ = true;
DexLayout dex_layout(options, profile_compilation_info_, /*file*/ nullptr, /*header*/ nullptr);
{
TimingLogger::ScopedTiming extract("ProcessDexFile", timings_);
if (dex_layout.ProcessDexFile(location.c_str(),
dex_file.get(),
0,
&dex_container_,
&error_msg)) {
oat_dex_file->dex_sections_layout_ = dex_layout.GetSections();
oat_dex_file->cdex_main_section_ = dex_container_->GetMainSection()->ReleaseData();
// Dex layout can affect the size of the dex file, so we update here what we have set
// when adding the dex file as a source.
const UnalignedDexFileHeader* header =
AsUnalignedDexFileHeader(oat_dex_file->cdex_main_section_.data());
oat_dex_file->dex_file_size_ = header->file_size_;
} else {
LOG(WARNING) << "Failed to run dex layout, reason:" << error_msg;
// Since we failed to convert the dex, just copy the input dex.
if (dex_container_ != nullptr) {
// Clear the main section before processing next dex file in case we have written some data.
dex_container_->GetMainSection()->Clear();
}
}
}
CHECK_EQ(oat_dex_file->dex_file_location_checksum_, dex_file->GetLocationChecksum());
return true;
}
bool OatWriter::OpenDexFiles(
File* file,
bool verify,
/*inout*/ std::vector<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;
}
if (!extract_dex_files_into_vdex_) {
DCHECK_EQ(opened_dex_files_map->size(), 0u);
std::vector<std::unique_ptr<const DexFile>> dex_files;
for (OatDexFile& oat_dex_file : oat_dex_files_) {
// The dex file is already open, release the reference.
dex_files.emplace_back(std::move(oat_dex_file.dex_file_));
oat_dex_file.class_offsets_.resize(dex_files.back()->GetHeader().class_defs_size_);
}
*opened_dex_files = std::move(dex_files);
CloseSources();
return true;
}
// We could have closed the sources at the point of writing the dex files, but to
// make it consistent with the case we're not writing the dex files, we close them now.
CloseSources();
DCHECK_EQ(opened_dex_files_map->size(), 1u);
DCHECK(vdex_begin_ == opened_dex_files_map->front().Begin());
std::vector<std::unique_ptr<const DexFile>> dex_files;
for (OatDexFile& oat_dex_file : oat_dex_files_) {
const uint8_t* raw_dex_file = vdex_begin_ + oat_dex_file.dex_file_offset_;
if (kIsDebugBuild) {
// Check the validity of the input files.
// Note that ValidateDexFileHeader() logs error messages.
CHECK(ValidateDexFileHeader(raw_dex_file, oat_dex_file.GetLocation()))
<< "Failed to verify written dex file header!"
<< " Output: " << file->GetPath()
<< " ~ " << std::hex << static_cast<const void*>(raw_dex_file);
const UnalignedDexFileHeader* header = AsUnalignedDexFileHeader(raw_dex_file);
CHECK_EQ(header->file_size_, oat_dex_file.dex_file_size_)
<< "File size mismatch in written dex file header! Expected: "
<< oat_dex_file.dex_file_size_ << " Actual: " << header->file_size_
<< " Output: " << file->GetPath();
}
// Now, open the dex file.
std::string error_msg;
ArtDexFileLoader dex_file_loader(
raw_dex_file, oat_dex_file.dex_file_size_, oat_dex_file.GetLocation());
dex_files.emplace_back(dex_file_loader.Open(oat_dex_file.dex_file_location_checksum_,
/* oat_dex_file */ nullptr,
verify,
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;
}
// Set the class_offsets size now that we have easy access to the DexFile and
// it has been verified in dex_file_loader.Open.
oat_dex_file.class_offsets_.resize(dex_files.back()->GetHeader().class_defs_size_);
}
*opened_dex_files = std::move(dex_files);
return true;
}
void OatWriter::InitializeTypeLookupTables(
const std::vector<std::unique_ptr<const DexFile>>& opened_dex_files) {
TimingLogger::ScopedTiming split("InitializeTypeLookupTables", 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];
DCHECK_EQ(oat_dex_file->lookup_table_offset_, 0u);
size_t table_size = TypeLookupTable::RawDataLength(oat_dex_file->class_offsets_.size());
if (table_size == 0u) {
// We want a 1:1 mapping between `dex_files_` and `type_lookup_table_oat_dex_files_`,
// to simplify `WriteTypeLookupTables`. We push a null entry to notify
// that the dex file at index `i` does not have a type lookup table.
type_lookup_table_oat_dex_files_.push_back(nullptr);
continue;
}
const DexFile& dex_file = *opened_dex_files[i].get();
TypeLookupTable type_lookup_table = TypeLookupTable::Create(dex_file);
type_lookup_table_oat_dex_files_.push_back(
std::make_unique<art::OatDexFile>(std::move(type_lookup_table)));
dex_file.SetOatDexFile(type_lookup_table_oat_dex_files_.back().get());
}
}
bool OatWriter::WriteDexLayoutSections(OutputStream* oat_rodata,
const std::vector<const DexFile*>& opened_dex_files) {
TimingLogger::ScopedTiming split(__FUNCTION__, timings_);
if (!kWriteDexLayoutInfo) {
return true;
}
uint32_t expected_offset = oat_data_offset_ + oat_size_;
off_t actual_offset = oat_rodata->Seek(expected_offset, kSeekSet);
if (static_cast<uint32_t>(actual_offset) != expected_offset) {
PLOG(ERROR) << "Failed to seek to dex layout section offset section. Actual: " << actual_offset
<< " Expected: " << expected_offset << " File: " << oat_rodata->GetLocation();
return false;
}
DCHECK_EQ(opened_dex_files.size(), oat_dex_files_.size());
size_t rodata_offset = oat_size_;
for (size_t i = 0, size = opened_dex_files.size(); i != size; ++i) {
OatDexFile* oat_dex_file = &oat_dex_files_[i];
DCHECK_EQ(oat_dex_file->dex_sections_layout_offset_, 0u);
// Write dex layout section alignment bytes.
const size_t padding_size =
RoundUp(rodata_offset, alignof(DexLayoutSections)) - rodata_offset;
if (padding_size != 0u) {
std::vector<uint8_t> buffer(padding_size, 0u);
if (!oat_rodata->WriteFully(buffer.data(), padding_size)) {
PLOG(ERROR) << "Failed to write lookup table alignment padding."
<< " File: " << oat_dex_file->GetLocation()
<< " Output: " << oat_rodata->GetLocation();
return false;
}
size_oat_dex_file_dex_layout_sections_alignment_ += padding_size;
rodata_offset += padding_size;
}
DCHECK_ALIGNED(rodata_offset, alignof(DexLayoutSections));
DCHECK_EQ(oat_data_offset_ + rodata_offset,
static_cast<size_t>(oat_rodata->Seek(0u, kSeekCurrent)));
DCHECK(oat_dex_file != nullptr);
if (!oat_rodata->WriteFully(&oat_dex_file->dex_sections_layout_,
sizeof(oat_dex_file->dex_sections_layout_))) {
PLOG(ERROR) << "Failed to write dex layout sections."
<< " File: " << oat_dex_file->GetLocation()
<< " Output: " << oat_rodata->GetLocation();
return false;
}
oat_dex_file->dex_sections_layout_offset_ = rodata_offset;
size_oat_dex_file_dex_layout_sections_ += sizeof(oat_dex_file->dex_sections_layout_);
rodata_offset += sizeof(oat_dex_file->dex_sections_layout_);
}
oat_size_ = rodata_offset;
if (!oat_rodata->Flush()) {
PLOG(ERROR) << "Failed to flush stream after writing type dex layout sections."
<< " File: " << oat_rodata->GetLocation();
return false;
}
return true;
}
void OatWriter::WriteTypeLookupTables(/*out*/std::vector<uint8_t>* buffer) {
TimingLogger::ScopedTiming split("WriteTypeLookupTables", timings_);
size_t type_lookup_table_size = 0u;
for (const DexFile* dex_file : *dex_files_) {
type_lookup_table_size +=
sizeof(uint32_t) + TypeLookupTable::RawDataLength(dex_file->NumClassDefs());
}
// Reserve the space to avoid reallocations later on.
buffer->reserve(buffer->size() + type_lookup_table_size);
// Align the start of the first type lookup table.
size_t initial_offset = vdex_size_;
size_t table_offset = RoundUp(initial_offset, 4);
size_t padding_size = table_offset - initial_offset;
size_vdex_lookup_table_alignment_ += padding_size;
for (uint32_t j = 0; j < padding_size; ++j) {
buffer->push_back(0);
}
vdex_size_ += padding_size;
vdex_lookup_tables_offset_ = vdex_size_;
for (size_t i = 0, size = type_lookup_table_oat_dex_files_.size(); i != size; ++i) {
OatDexFile* oat_dex_file = &oat_dex_files_[i];
if (type_lookup_table_oat_dex_files_[i] == nullptr) {
buffer->insert(buffer->end(), {0u, 0u, 0u, 0u});
size_vdex_lookup_table_ += sizeof(uint32_t);
vdex_size_ += sizeof(uint32_t);
oat_dex_file->lookup_table_offset_ = 0u;
} else {
oat_dex_file->lookup_table_offset_ = vdex_size_ + sizeof(uint32_t);
const TypeLookupTable& table = type_lookup_table_oat_dex_files_[i]->GetTypeLookupTable();
uint32_t table_size = table.RawDataLength();
DCHECK_NE(0u, table_size);
DCHECK_ALIGNED(table_size, 4);
size_t old_buffer_size = buffer->size();
buffer->resize(old_buffer_size + table.RawDataLength() + sizeof(uint32_t), 0u);
memcpy(buffer->data() + old_buffer_size, &table_size, sizeof(uint32_t));
memcpy(buffer->data() + old_buffer_size + sizeof(uint32_t), table.RawData(), table_size);
vdex_size_ += table_size + sizeof(uint32_t);
size_vdex_lookup_table_ += table_size + sizeof(uint32_t);
}
}
}
bool OatWriter::FinishVdexFile(File* vdex_file, verifier::VerifierDeps* verifier_deps) {
size_t old_vdex_size = vdex_size_;
std::vector<uint8_t> buffer;
buffer.reserve(64 * KB);
WriteVerifierDeps(verifier_deps, &buffer);
WriteTypeLookupTables(&buffer);
DCHECK_EQ(vdex_size_, old_vdex_size + buffer.size());
// Resize the vdex file.
if (vdex_file->SetLength(vdex_size_) != 0) {
PLOG(ERROR) << "Failed to resize vdex file " << vdex_file->GetPath();
return false;
}
uint8_t* vdex_begin = vdex_begin_;
MemMap extra_map;
if (extract_dex_files_into_vdex_) {
DCHECK(vdex_begin != nullptr);
// Write data to the last already mmapped page of the vdex file.
size_t mmapped_vdex_size = RoundUp(old_vdex_size, kPageSize);
size_t first_chunk_size = std::min(buffer.size(), mmapped_vdex_size - old_vdex_size);
memcpy(vdex_begin + old_vdex_size, buffer.data(), first_chunk_size);
if (first_chunk_size != buffer.size()) {
size_t tail_size = buffer.size() - first_chunk_size;
std::string error_msg;
extra_map = MemMap::MapFile(
tail_size,
PROT_READ | PROT_WRITE,
MAP_SHARED,
vdex_file->Fd(),
/*start=*/ mmapped_vdex_size,
/*low_4gb=*/ false,
vdex_file->GetPath().c_str(),
&error_msg);
if (!extra_map.IsValid()) {
LOG(ERROR) << "Failed to mmap() vdex file tail. File: " << vdex_file->GetPath()
<< " error: " << error_msg;
return false;
}
memcpy(extra_map.Begin(), buffer.data() + first_chunk_size, tail_size);
}
} else {
DCHECK(vdex_begin == nullptr);
std::string error_msg;
extra_map = MemMap::MapFile(
vdex_size_,
PROT_READ | PROT_WRITE,
MAP_SHARED,
vdex_file->Fd(),
/*start=*/ 0u,
/*low_4gb=*/ false,
vdex_file->GetPath().c_str(),
&error_msg);
if (!extra_map.IsValid()) {
LOG(ERROR) << "Failed to mmap() vdex file. File: " << vdex_file->GetPath()
<< " error: " << error_msg;
return false;
}
vdex_begin = extra_map.Begin();
memcpy(vdex_begin + old_vdex_size, buffer.data(), buffer.size());
}
// Write checksums
off_t checksums_offset = VdexFile::GetChecksumsOffset();
VdexFile::VdexChecksum* checksums_data =
reinterpret_cast<VdexFile::VdexChecksum*>(vdex_begin + checksums_offset);
for (size_t i = 0, size = oat_dex_files_.size(); i != size; ++i) {
OatDexFile* oat_dex_file = &oat_dex_files_[i];
checksums_data[i] = oat_dex_file->dex_file_location_checksum_;
}
// Write sections.
uint8_t* ptr = vdex_begin + sizeof(VdexFile::VdexFileHeader);
// Checksums section.
new (ptr) VdexFile::VdexSectionHeader(VdexSection::kChecksumSection,
checksums_offset,
size_vdex_checksums_);
ptr += sizeof(VdexFile::VdexSectionHeader);
// Dex section.
new (ptr) VdexFile::VdexSectionHeader(
VdexSection::kDexFileSection,
extract_dex_files_into_vdex_ ? vdex_dex_files_offset_ : 0u,
extract_dex_files_into_vdex_ ? vdex_verifier_deps_offset_ - vdex_dex_files_offset_ : 0u);
ptr += sizeof(VdexFile::VdexSectionHeader);
// VerifierDeps section.
new (ptr) VdexFile::VdexSectionHeader(VdexSection::kVerifierDepsSection,
vdex_verifier_deps_offset_,
size_verifier_deps_);
ptr += sizeof(VdexFile::VdexSectionHeader);
// TypeLookupTable section.
new (ptr) VdexFile::VdexSectionHeader(VdexSection::kTypeLookupTableSection,
vdex_lookup_tables_offset_,
vdex_size_ - vdex_lookup_tables_offset_);
// All the contents (except the header) of the vdex file has been emitted in memory. Flush it
// to disk.
{
TimingLogger::ScopedTiming split("VDEX flush contents", timings_);
// Sync the data to the disk while the header is invalid. We do not want to end up with
// a valid header and invalid data if the process is suddenly killed.
if (extract_dex_files_into_vdex_) {
// Note: We passed the ownership of the vdex dex file MemMap to the caller,
// so we need to use msync() for the range explicitly.
if (msync(vdex_begin, RoundUp(old_vdex_size, kPageSize), MS_SYNC) != 0) {
PLOG(ERROR) << "Failed to sync vdex file contents" << vdex_file->GetPath();
return false;
}
}
if (extra_map.IsValid() && !extra_map.Sync()) {
PLOG(ERROR) << "Failed to sync vdex file contents" << vdex_file->GetPath();
return false;
}
}
// Now that we know all contents have been flushed to disk, we can write
// the header which will mke the vdex usable.
bool has_dex_section = extract_dex_files_into_vdex_;
new (vdex_begin) VdexFile::VdexFileHeader(has_dex_section);
// Note: If `extract_dex_files_into_vdex_`, we passed the ownership of the vdex dex file
// MemMap to the caller, so we need to use msync() for the range explicitly.
if (msync(vdex_begin, kPageSize, MS_SYNC) != 0) {
PLOG(ERROR) << "Failed to sync vdex file header " << vdex_file->GetPath();
return false;
}
return true;
}
bool OatWriter::WriteCodeAlignment(OutputStream* out, uint32_t aligned_code_delta) {
return WriteUpTo16BytesAlignment(out, aligned_code_delta, &size_code_alignment_);
}
bool OatWriter::WriteUpTo16BytesAlignment(OutputStream* out, uint32_t size, uint32_t* stat) {
static const uint8_t kPadding[] = {
0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u, 0u
};
DCHECK_LE(size, sizeof(kPadding));
if (UNLIKELY(!out->WriteFully(kPadding, size))) {
return false;
}
*stat += size;
return true;
}
void OatWriter::SetMultiOatRelativePatcherAdjustment() {
DCHECK(dex_files_ != nullptr);
DCHECK(relative_patcher_ != nullptr);
DCHECK_NE(oat_data_offset_, 0u);
if (image_writer_ != nullptr && !dex_files_->empty()) {
// The oat data begin may not be initialized yet but the oat file offset is ready.
size_t oat_index = image_writer_->GetOatIndexForDexFile(dex_files_->front());
size_t elf_file_offset = image_writer_->GetOatFileOffset(oat_index);
relative_patcher_->StartOatFile(elf_file_offset + oat_data_offset_);
}
}
OatWriter::OatDexFile::OatDexFile(std::unique_ptr<const DexFile> dex_file)
: dex_file_(std::move(dex_file)),
dex_file_location_(std::make_unique<std::string>(dex_file_->GetLocation())),
dex_file_size_(dex_file_->Size()),
offset_(0),
dex_file_location_size_(strlen(dex_file_location_->c_str())),
dex_file_location_data_(dex_file_location_->c_str()),
dex_file_location_checksum_(dex_file_->GetLocationChecksum()),
dex_file_offset_(0u),
lookup_table_offset_(0u),
class_offsets_offset_(0u),
method_bss_mapping_offset_(0u),
type_bss_mapping_offset_(0u),
public_type_bss_mapping_offset_(0u),
package_type_bss_mapping_offset_(0u),
string_bss_mapping_offset_(0u),
dex_sections_layout_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_)
+ sizeof(method_bss_mapping_offset_)
+ sizeof(type_bss_mapping_offset_)
+ sizeof(public_type_bss_mapping_offset_)
+ sizeof(package_type_bss_mapping_offset_)
+ sizeof(string_bss_mapping_offset_)
+ sizeof(dex_sections_layout_offset_);
}
bool OatWriter::OatDexFile::Write(OatWriter* oat_writer, OutputStream* out) const {
const size_t file_offset = oat_writer->oat_data_offset_;
DCHECK_OFFSET_();
if (!out->WriteFully(&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 (!out->WriteFully(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 (!out->WriteFully(&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 (!out->WriteFully(&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 (!out->WriteFully(&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 (!out->WriteFully(&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_);
if (!out->WriteFully(&dex_sections_layout_offset_, sizeof(dex_sections_layout_offset_))) {
PLOG(ERROR) << "Failed to write dex section layout info to " << out->GetLocation();
return false;
}
oat_writer->size_oat_dex_file_dex_layout_sections_offset_ += sizeof(dex_sections_layout_offset_);
if (!out->WriteFully(&method_bss_mapping_offset_, sizeof(method_bss_mapping_offset_))) {
PLOG(ERROR) << "Failed to write method bss mapping offset to " << out->GetLocation();
return false;
}
oat_writer->size_oat_dex_file_method_bss_mapping_offset_ += sizeof(method_bss_mapping_offset_);
if (!out->WriteFully(&type_bss_mapping_offset_, sizeof(type_bss_mapping_offset_))) {
PLOG(ERROR) << "Failed to write type bss mapping offset to " << out->GetLocation();
return false;
}
oat_writer->size_oat_dex_file_type_bss_mapping_offset_ += sizeof(type_bss_mapping_offset_);
if (!out->WriteFully(&public_type_bss_mapping_offset_, sizeof(public_type_bss_mapping_offset_))) {
PLOG(ERROR) << "Failed to write public type bss mapping offset to " << out->GetLocation();
return false;
}
oat_writer->size_oat_dex_file_public_type_bss_mapping_offset_ +=
sizeof(public_type_bss_mapping_offset_);
if (!out->WriteFully(&package_type_bss_mapping_offset_,
sizeof(package_type_bss_mapping_offset_))) {
PLOG(ERROR) << "Failed to write package type bss mapping offset to " << out->GetLocation();
return false;
}
oat_writer->size_oat_dex_file_package_type_bss_mapping_offset_ +=
sizeof(package_type_bss_mapping_offset_);
if (!out->WriteFully(&string_bss_mapping_offset_, sizeof(string_bss_mapping_offset_))) {
PLOG(ERROR) << "Failed to write string bss mapping offset to " << out->GetLocation();
return false;
}
oat_writer->size_oat_dex_file_string_bss_mapping_offset_ += sizeof(string_bss_mapping_offset_);
return true;
}
bool OatWriter::BssMappingInfo::Write(OatWriter* oat_writer, OutputStream* out) const {
const size_t file_offset = oat_writer->oat_data_offset_;
DCHECK_OFFSET_();
if (!out->WriteFully(&method_bss_mapping_offset, sizeof(method_bss_mapping_offset))) {
PLOG(ERROR) << "Failed to write method bss mapping offset to " << out->GetLocation();
return false;
}
oat_writer->size_bcp_bss_info_method_bss_mapping_offset_ += sizeof(method_bss_mapping_offset);
if (!out->WriteFully(&type_bss_mapping_offset, sizeof(type_bss_mapping_offset))) {
PLOG(ERROR) << "Failed to write type bss mapping offset to " << out->GetLocation();
return false;
}
oat_writer->size_bcp_bss_info_type_bss_mapping_offset_ += sizeof(type_bss_mapping_offset);
if (!out->WriteFully(&public_type_bss_mapping_offset, sizeof(public_type_bss_mapping_offset))) {
PLOG(ERROR) << "Failed to write public type bss mapping offset to " << out->GetLocation();
return false;
}
oat_writer->size_bcp_bss_info_public_type_bss_mapping_offset_ +=
sizeof(public_type_bss_mapping_offset);
if (!out->WriteFully(&package_type_bss_mapping_offset, sizeof(package_type_bss_mapping_offset))) {
PLOG(ERROR) << "Failed to write package type bss mapping offset to " << out->GetLocation();
return false;
}
oat_writer->size_bcp_bss_info_package_type_bss_mapping_offset_ +=
sizeof(package_type_bss_mapping_offset);
if (!out->WriteFully(&string_bss_mapping_offset, sizeof(string_bss_mapping_offset))) {
PLOG(ERROR) << "Failed to write string bss mapping offset to " << out->GetLocation();
return false;
}
oat_writer->size_bcp_bss_info_string_bss_mapping_offset_ += sizeof(string_bss_mapping_offset);
return true;
}
bool OatWriter::OatDexFile::WriteClassOffsets(OatWriter* oat_writer, OutputStream* out) {
if (!out->WriteFully(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(const dchecked_vector<CompiledMethod*>& compiled_methods,
uint32_t compiled_methods_with_code,
uint16_t oat_class_type)
: compiled_methods_(compiled_methods) {
const uint32_t num_methods = compiled_methods.size();
CHECK_LE(compiled_methods_with_code, num_methods);
oat_method_offsets_offsets_from_oat_class_.resize(num_methods);
method_offsets_.resize(compiled_methods_with_code);
method_headers_.resize(compiled_methods_with_code);
uint32_t oat_method_offsets_offset_from_oat_class = OatClassHeader::SizeOf();
// We only write method-related data if there are at least some compiled methods.
num_methods_ = 0u;
DCHECK(method_bitmap_ == nullptr);
if (oat_class_type != enum_cast<uint16_t>(OatClassType::kNoneCompiled)) {
num_methods_ = num_methods;
oat_method_offsets_offset_from_oat_class += sizeof(num_methods_);
if (oat_class_type == enum_cast<uint16_t>(OatClassType::kSomeCompiled)) {
method_bitmap_.reset(new BitVector(num_methods, false, Allocator::GetMallocAllocator()));
uint32_t bitmap_size = BitVector::BitsToWords(num_methods) * BitVector::kWordBytes;
DCHECK_EQ(bitmap_size, method_bitmap_->GetSizeOf());
oat_method_offsets_offset_from_oat_class += bitmap_size;
}
}
for (size_t i = 0; i < num_methods; i++) {
CompiledMethod* compiled_method = compiled_methods_[i];
if (HasCompiledCode(compiled_method)) {
oat_method_offsets_offsets_from_oat_class_[i] = oat_method_offsets_offset_from_oat_class;
oat_method_offsets_offset_from_oat_class += sizeof(OatMethodOffsets);
if (oat_class_type == enum_cast<uint16_t>(OatClassType::kSomeCompiled)) {
method_bitmap_->SetBit(i);
}
} else {
oat_method_offsets_offsets_from_oat_class_[i] = 0;
}
}
}
size_t OatWriter::OatClass::SizeOf() const {
return ((num_methods_ == 0) ? 0 : sizeof(num_methods_)) +
((method_bitmap_ != nullptr) ? method_bitmap_->GetSizeOf() : 0u) +
(sizeof(method_offsets_[0]) * method_offsets_.size());
}
bool OatWriter::OatClassHeader::Write(OatWriter* oat_writer,
OutputStream* out,
const size_t file_offset) const {
DCHECK_OFFSET_();
if (!out->WriteFully(&status_, sizeof(status_))) {
PLOG(ERROR) << "Failed to write class status to " << out->GetLocation();
return false;
}
oat_writer->size_oat_class_status_ += sizeof(status_);
if (!out->WriteFully(&type_, sizeof(type_))) {
PLOG(ERROR) << "Failed to write oat class type to " << out->GetLocation();
return false;
}
oat_writer->size_oat_class_type_ += sizeof(type_);
return true;
}
bool OatWriter::OatClass::Write(OatWriter* oat_writer, OutputStream* out) const {
if (num_methods_ != 0u) {
if (!out->WriteFully(&num_methods_, sizeof(num_methods_))) {
PLOG(ERROR) << "Failed to write number of methods to " << out->GetLocation();
return false;
}
oat_writer->size_oat_class_num_methods_ += sizeof(num_methods_);
}
if (method_bitmap_ != nullptr) {
if (!out->WriteFully(method_bitmap_->GetRawStorage(), method_bitmap_->GetSizeOf())) {
PLOG(ERROR) << "Failed to write method bitmap to " << out->GetLocation();
return false;
}
oat_writer->size_oat_class_method_bitmaps_ += method_bitmap_->GetSizeOf();
}
if (!out->WriteFully(method_offsets_.data(), GetMethodOffsetsRawSize())) {
PLOG(ERROR) << "Failed to write method offsets to " << out->GetLocation();
return false;
}
oat_writer->size_oat_class_method_offsets_ += GetMethodOffsetsRawSize();
return true;
}
debug::DebugInfo OatWriter::GetDebugInfo() const {
debug::DebugInfo debug_info{};
debug_info.compiled_methods = ArrayRef<const debug::MethodDebugInfo>(method_info_);
if (VdexWillContainDexFiles()) {
DCHECK_EQ(dex_files_->size(), oat_dex_files_.size());
for (size_t i = 0, size = dex_files_->size(); i != size; ++i) {
const DexFile* dex_file = (*dex_files_)[i];
const OatDexFile& oat_dex_file = oat_dex_files_[i];
uint32_t dex_file_offset = oat_dex_file.dex_file_offset_;
if (dex_file_offset != 0) {
debug_info.dex_files.emplace(dex_file_offset, dex_file);
}
}
}
return debug_info;
}
} // namespace linker
} // namespace art