| // Copyright 2011 Google Inc. All Rights Reserved. |
| |
| #include "oat_writer.h" |
| |
| #include "class_linker.h" |
| #include "class_loader.h" |
| #include "file.h" |
| #include "os.h" |
| #include "stl_util.h" |
| |
| namespace art { |
| |
| bool OatWriter::Create(const std::string& filename, const ClassLoader* class_loader) { |
| const std::vector<const DexFile*>& dex_files = ClassLoader::GetClassPath(class_loader); |
| OatWriter oat_writer(dex_files, class_loader); |
| return oat_writer.Write(filename); |
| } |
| |
| OatWriter::OatWriter(const std::vector<const DexFile*>& dex_files, const ClassLoader* class_loader) { |
| class_loader_ = class_loader; |
| dex_files_ = &dex_files; |
| |
| size_t offset = InitOatHeader(); |
| offset = InitOatDexFiles(offset); |
| offset = InitOatClasses(offset); |
| offset = InitOatMethods(offset); |
| offset = InitOatCode(offset); |
| offset = InitOatCodeDexFiles(offset); |
| |
| CHECK_EQ(dex_files_->size(), oat_dex_files_.size()); |
| CHECK_EQ(dex_files_->size(), oat_classes_.size()); |
| } |
| |
| size_t OatWriter::InitOatHeader() { |
| // create the OatHeader |
| oat_header_ = new OatHeader(dex_files_); |
| size_t offset = sizeof(*oat_header_); |
| return offset; |
| } |
| |
| size_t OatWriter::InitOatDexFiles(size_t offset) { |
| // create the OatDexFiles |
| for (size_t i = 0; i != dex_files_->size(); ++i) { |
| const DexFile* dex_file = (*dex_files_)[i]; |
| CHECK(dex_file != NULL); |
| OatDexFile* oat_dex_file = new OatDexFile(*dex_file); |
| oat_dex_files_.push_back(oat_dex_file); |
| offset += oat_dex_file->SizeOf(); |
| } |
| return offset; |
| } |
| |
| size_t OatWriter::InitOatClasses(size_t offset) { |
| // create the OatClasses |
| // calculate the offsets within OatDexFiles to OatClasses |
| for (size_t i = 0; i != dex_files_->size(); ++i) { |
| // set offset in OatDexFile to OatClasses |
| oat_dex_files_[i]->classes_offset_ = offset; |
| oat_dex_files_[i]->UpdateChecksum(*oat_header_); |
| |
| const DexFile* dex_file = (*dex_files_)[i]; |
| OatClasses* oat_classes = new OatClasses(*dex_file); |
| oat_classes_.push_back(oat_classes); |
| offset += oat_classes->SizeOf(); |
| } |
| return offset; |
| } |
| |
| size_t OatWriter::InitOatMethods(size_t offset) { |
| // create the OatMethods |
| // calculate the offsets within OatClasses to OatMethods |
| size_t class_index = 0; |
| for (size_t i = 0; i != dex_files_->size(); ++i) { |
| const DexFile* dex_file = (*dex_files_)[i]; |
| for (size_t class_def_index = 0; |
| class_def_index < dex_file->NumClassDefs(); |
| class_def_index++, class_index++) { |
| oat_classes_[i]->methods_offsets_[class_def_index] = offset; |
| const DexFile::ClassDef& class_def = dex_file->GetClassDef(class_def_index); |
| const byte* class_data = dex_file->GetClassData(class_def); |
| DexFile::ClassDataHeader header = dex_file->ReadClassDataHeader(&class_data); |
| size_t num_direct_methods = header.direct_methods_size_; |
| size_t num_virtual_methods = header.virtual_methods_size_; |
| uint32_t num_methods = num_direct_methods + num_virtual_methods; |
| OatMethods* oat_methods = new OatMethods(num_methods); |
| oat_methods_.push_back(oat_methods); |
| offset += oat_methods->SizeOf(); |
| } |
| oat_classes_[i]->UpdateChecksum(*oat_header_); |
| } |
| 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); |
| executable_offset_padding_length_ = offset - old_offset; |
| return offset; |
| } |
| |
| size_t OatWriter::InitOatCodeDexFiles(size_t offset) { |
| // calculate the offsets within OatMethods |
| size_t oat_class_index = 0; |
| for (size_t i = 0; i != dex_files_->size(); ++i) { |
| const DexFile* dex_file = (*dex_files_)[i]; |
| CHECK(dex_file != NULL); |
| offset = InitOatCodeDexFile(offset, oat_class_index, *dex_file); |
| } |
| return offset; |
| } |
| |
| size_t OatWriter::InitOatCodeDexFile(size_t offset, |
| size_t& oat_class_index, |
| const DexFile& dex_file) { |
| for (size_t class_def_index = 0; |
| class_def_index < dex_file.NumClassDefs(); |
| class_def_index++, oat_class_index++) { |
| const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); |
| offset = InitOatCodeClassDef(offset, oat_class_index, dex_file, class_def); |
| oat_methods_[oat_class_index]->UpdateChecksum(*oat_header_); |
| } |
| return offset; |
| } |
| |
| size_t OatWriter::InitOatCodeClassDef(size_t offset, |
| size_t oat_class_index, |
| const DexFile& dex_file, |
| const DexFile::ClassDef& class_def) { |
| const byte* class_data = dex_file.GetClassData(class_def); |
| DexFile::ClassDataHeader header = dex_file.ReadClassDataHeader(&class_data); |
| size_t num_virtual_methods = header.virtual_methods_size_; |
| const char* descriptor = dex_file.GetClassDescriptor(class_def); |
| |
| // TODO: remove code ByteArrays from Class/Method (and therefore ClassLoader) |
| // TODO: don't write code for shared stubs |
| Class* klass = Runtime::Current()->GetClassLinker()->FindClass(descriptor, class_loader_); |
| CHECK(klass != NULL) << descriptor; |
| CHECK_EQ(klass->GetClassLoader(), class_loader_); |
| CHECK_EQ(oat_methods_[oat_class_index]->method_offsets_.size(), |
| klass->NumDirectMethods() + num_virtual_methods); |
| // Note that we leave the offset to the code in Method::code_ |
| size_t class_def_method_index = 0; |
| for (size_t i = 0; i < klass->NumDirectMethods(); i++, class_def_method_index++) { |
| Method* method = klass->GetDirectMethod(i); |
| CHECK(method != NULL) << descriptor << " direct " << i; |
| offset = InitOatCodeMethod(offset, oat_class_index, class_def_method_index, method); |
| } |
| // note that num_virtual_methods != klass->NumVirtualMethods() because of miranda methods |
| for (size_t i = 0; i < num_virtual_methods; i++, class_def_method_index++) { |
| Method* method = klass->GetVirtualMethod(i); |
| CHECK(method != NULL) << descriptor << " virtual " << i; |
| offset = InitOatCodeMethod(offset, oat_class_index, class_def_method_index, method); |
| } |
| return offset; |
| } |
| |
| size_t OatWriter::InitOatCodeMethod(size_t offset, |
| size_t oat_class_index, |
| size_t class_def_method_index, |
| Method* method) { |
| Runtime* runtime = Runtime::Current(); |
| ByteArray* jni_stub_array = runtime->GetJniStubArray(); |
| ByteArray* ame_stub_array = runtime->GetAbstractMethodErrorStubArray(); |
| |
| const ByteArray* code_array = method->GetCodeArray(); |
| if (code_array == NULL || code_array == jni_stub_array || code_array == ame_stub_array) { |
| oat_methods_[oat_class_index]->method_offsets_[class_def_method_index] = 0; |
| method->SetOatCodeOffset(0); |
| } else { |
| offset = RoundUp(offset, kArmAlignment); |
| uint32_t thumb_offset = (reinterpret_cast<const int8_t*>(method->GetCode()) |
| - code_array->GetData()); |
| uint32_t code_offset = offset + thumb_offset; |
| oat_methods_[oat_class_index]->method_offsets_[class_def_method_index] = code_offset; |
| method->SetOatCodeOffset(code_offset); |
| offset += code_array->GetLength(); |
| oat_header_->UpdateChecksum(code_array->GetData(), code_array->GetLength()); |
| } |
| return offset; |
| } |
| |
| bool OatWriter::Write(const std::string& filename) { |
| |
| UniquePtr<File> file(OS::OpenFile(filename.c_str(), true)); |
| if (file.get() == NULL) { |
| return false; |
| } |
| |
| if (!file->WriteFully(oat_header_, sizeof(*oat_header_))) { |
| PLOG(ERROR) << "Failed to write oat header to " << filename; |
| return false; |
| } |
| |
| if (!WriteTables(file.get())) { |
| LOG(ERROR) << "Failed to write oat tables to " << filename; |
| return false; |
| } |
| |
| size_t code_offset = WriteCode(file.get()); |
| if (code_offset == 0) { |
| LOG(ERROR) << "Failed to write oat code to " << filename; |
| return false; |
| } |
| |
| code_offset = WriteCodeDexFiles(file.get(), code_offset); |
| if (code_offset == 0) { |
| LOG(ERROR) << "Failed to write oat code for dex files to " << filename; |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool OatWriter::WriteTables(File* file) { |
| for (size_t i = 0; i != oat_dex_files_.size(); ++i) { |
| if (!oat_dex_files_[i]->Write(file)) { |
| PLOG(ERROR) << "Failed to write oat dex information"; |
| return false; |
| } |
| } |
| for (size_t i = 0; i != oat_classes_.size(); ++i) { |
| if (!oat_classes_[i]->Write(file)) { |
| PLOG(ERROR) << "Failed to write oat classes information"; |
| return false; |
| } |
| } |
| for (size_t i = 0; i != oat_methods_.size(); ++i) { |
| if (!oat_methods_[i]->Write(file)) { |
| PLOG(ERROR) << "Failed to write oat methods information"; |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| size_t OatWriter::WriteCode(File* file) { |
| uint32_t code_offset = oat_header_->GetExecutableOffset(); |
| off_t new_offset = lseek(file->Fd(), executable_offset_padding_length_, SEEK_CUR); |
| if (static_cast<uint32_t>(new_offset) != code_offset) { |
| PLOG(ERROR) << "Failed to seek to oat code section"; |
| return 0; |
| } |
| return code_offset; |
| } |
| |
| size_t OatWriter::WriteCodeDexFiles(File* file, size_t code_offset) { |
| for (size_t i = 0; i != oat_classes_.size(); ++i) { |
| const DexFile* dex_file = (*dex_files_)[i]; |
| CHECK(dex_file != NULL); |
| code_offset = WriteCodeDexFile(file, code_offset, *dex_file); |
| if (code_offset == 0) { |
| return 0; |
| } |
| } |
| return code_offset; |
| } |
| |
| size_t OatWriter::WriteCodeDexFile(File* file, |
| size_t code_offset, |
| const DexFile& dex_file) { |
| for (size_t class_def_index = 0; |
| class_def_index < dex_file.NumClassDefs(); |
| class_def_index++) { |
| const DexFile::ClassDef& class_def = dex_file.GetClassDef(class_def_index); |
| code_offset = WriteCodeClassDef(file, code_offset, dex_file, class_def); |
| if (code_offset == 0) { |
| return 0; |
| } |
| } |
| return code_offset; |
| } |
| |
| size_t OatWriter::WriteCodeClassDef(File* file, |
| size_t code_offset, |
| const DexFile& dex_file, |
| const DexFile::ClassDef& class_def) { |
| const Runtime* runtime = Runtime::Current(); |
| ClassLinker* class_linker = runtime->GetClassLinker(); |
| ByteArray* ame_stub_array = runtime->GetAbstractMethodErrorStubArray(); |
| |
| const byte* class_data = dex_file.GetClassData(class_def); |
| DexFile::ClassDataHeader header = dex_file.ReadClassDataHeader(&class_data); |
| size_t num_virtual_methods = header.virtual_methods_size_; |
| const char* descriptor = dex_file.GetClassDescriptor(class_def); |
| Class* klass = class_linker->FindClass(descriptor, class_loader_); |
| |
| // TODO: deduplicate code arrays |
| // Note that we clear the code array here, image_writer will use GetCodeOffset to find it |
| for (size_t i = 0; i < klass->NumDirectMethods(); i++) { |
| Method* method = klass->GetDirectMethod(i); |
| code_offset = WriteCodeMethod(file, code_offset, method); |
| if (code_offset == 0) { |
| return 0; |
| } |
| } |
| // note that num_virtual_methods != klass->NumVirtualMethods() because of miranda methods |
| for (size_t i = 0; i < num_virtual_methods; i++) { |
| Method* method = klass->GetVirtualMethod(i); |
| code_offset = WriteCodeMethod(file, code_offset, method); |
| if (code_offset == 0) { |
| return 0; |
| } |
| } |
| for (size_t i = num_virtual_methods; i < klass->NumVirtualMethods(); i++) { |
| Method* method = klass->GetVirtualMethod(i); |
| const ByteArray* code_array = method->GetCodeArray(); |
| CHECK(code_array == NULL // if compiler not run |
| || code_array == ame_stub_array) // otherwise |
| << PrettyMethod(method) << " " << code_array; |
| method->SetCodeArray(NULL, kNone); |
| } |
| return code_offset; |
| } |
| |
| size_t OatWriter::WriteCodeMethod(File* file, |
| size_t code_offset, |
| Method* method) { |
| const Runtime* runtime = Runtime::Current(); |
| ByteArray* jni_stub_array = runtime->GetJniStubArray(); |
| ByteArray* ame_stub_array = runtime->GetAbstractMethodErrorStubArray(); |
| |
| const ByteArray* code_array = method->GetCodeArray(); |
| if (code_array != NULL && code_array != jni_stub_array && code_array != ame_stub_array) { |
| uint32_t aligned_code_offset = RoundUp(code_offset, kArmAlignment); |
| uint32_t aligned_code_delta = aligned_code_offset - code_offset; |
| if (aligned_code_delta != 0) { |
| off_t new_offset = lseek(file->Fd(), aligned_code_delta, SEEK_CUR); |
| if (static_cast<uint32_t>(new_offset) != aligned_code_offset) { |
| PLOG(ERROR) << "Failed to seek to align oat code"; |
| return false; |
| } |
| code_offset += aligned_code_delta; |
| } |
| if (!file->WriteFully(code_array->GetData(), code_array->GetLength())) { |
| PLOG(ERROR) << "Failed to write method code for " << PrettyMethod(method); |
| return false; |
| } |
| code_offset += code_array->GetLength(); |
| } |
| // preserve code offset around code clearing |
| uint32_t offset = method->GetOatCodeOffset(); |
| method->SetCodeArray(NULL, kNone); |
| method->SetOatCodeOffset(offset); |
| return code_offset; |
| } |
| |
| OatWriter::~OatWriter() { |
| delete oat_header_; |
| STLDeleteElements(&oat_dex_files_); |
| STLDeleteElements(&oat_classes_); |
| STLDeleteElements(&oat_methods_); |
| } |
| |
| OatWriter::OatDexFile::OatDexFile(const DexFile& dex_file) { |
| const std::string& location = dex_file.GetLocation(); |
| dex_file_location_size_ = location.size(); |
| dex_file_location_data_ = reinterpret_cast<const uint8_t*>(location.data()); |
| dex_file_checksum_ = dex_file.GetHeader().checksum_; |
| } |
| |
| size_t OatWriter::OatDexFile::SizeOf() const { |
| return sizeof(dex_file_location_size_) |
| + dex_file_location_size_ |
| + sizeof(dex_file_checksum_) |
| + sizeof(classes_offset_); |
| } |
| |
| void OatWriter::OatDexFile::UpdateChecksum(OatHeader& oat_header) const { |
| oat_header.UpdateChecksum(&dex_file_location_size_, sizeof(dex_file_location_size_)); |
| oat_header.UpdateChecksum(dex_file_location_data_, dex_file_location_size_); |
| oat_header.UpdateChecksum(&dex_file_checksum_, sizeof(dex_file_checksum_)); |
| oat_header.UpdateChecksum(&classes_offset_, sizeof(classes_offset_)); |
| } |
| |
| bool OatWriter::OatDexFile::Write(File* file) const { |
| if (!file->WriteFully(&dex_file_location_size_, sizeof(dex_file_location_size_))) { |
| PLOG(ERROR) << "Failed to write dex file location length"; |
| return false; |
| } |
| if (!file->WriteFully(dex_file_location_data_, dex_file_location_size_)) { |
| PLOG(ERROR) << "Failed to write dex file location data"; |
| return false; |
| } |
| if (!file->WriteFully(&dex_file_checksum_, sizeof(dex_file_checksum_))) { |
| PLOG(ERROR) << "Failed to write dex file checksum"; |
| return false; |
| } |
| if (!file->WriteFully(&classes_offset_, sizeof(classes_offset_))) { |
| PLOG(ERROR) << "Failed to write classes offset"; |
| return false; |
| } |
| return true; |
| } |
| |
| OatWriter::OatClasses::OatClasses(const DexFile& dex_file) { |
| methods_offsets_.resize(dex_file.NumClassDefs()); |
| } |
| |
| size_t OatWriter::OatClasses::SizeOf() const { |
| return (sizeof(methods_offsets_[0]) * methods_offsets_.size()); |
| } |
| |
| void OatWriter::OatClasses::UpdateChecksum(OatHeader& oat_header) const { |
| oat_header.UpdateChecksum(&methods_offsets_[0], SizeOf()); |
| } |
| |
| bool OatWriter::OatClasses::Write(File* file) const { |
| if (!file->WriteFully(&methods_offsets_[0], SizeOf())) { |
| PLOG(ERROR) << "Failed to methods offsets"; |
| return false; |
| } |
| return true; |
| } |
| |
| OatWriter::OatMethods::OatMethods(uint32_t methods_count) { |
| method_offsets_.resize(methods_count); |
| } |
| |
| size_t OatWriter::OatMethods::SizeOf() const { |
| return (sizeof(method_offsets_[0]) * method_offsets_.size()); |
| } |
| |
| void OatWriter::OatMethods::UpdateChecksum(OatHeader& oat_header) const { |
| oat_header.UpdateChecksum(&method_offsets_[0], SizeOf()); |
| } |
| |
| bool OatWriter::OatMethods::Write(File* file) const { |
| if (!file->WriteFully(&method_offsets_[0], SizeOf())) { |
| PLOG(ERROR) << "Failed to method offsets"; |
| return false; |
| } |
| return true; |
| } |
| |
| } // namespace art |