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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.
*/
#ifndef ART_SRC_OAT_WRITER_H_
#define ART_SRC_OAT_WRITER_H_
#include <stdint.h>
#include <cstddef>
#include "UniquePtr.h"
#include "compiler.h"
#include "dex_cache.h"
#include "mem_map.h"
#include "oat.h"
#include "object.h"
#include "os.h"
#include "space.h"
namespace art {
// OatHeader fixed length with count of D OatDexFiles
//
// OatDexFile[0] one variable sized OatDexFile with offsets to Dex and OatClasses
// OatDexFile[1]
// ...
// OatDexFile[D]
//
// Dex[0] one variable sized DexFile for each OatDexFile.
// Dex[1] these are literal copies of the input .dex files.
// ...
// Dex[D]
//
// OatClass[0] one variable sized OatClass for each of C DexFile::ClassDefs
// OatClass[1] contains OatClass entries with class status, offsets to code, etc.
// ...
// OatClass[C]
//
// padding if necessary so that the follow code will be page aligned
//
// CompiledMethod one variable sized blob with the contents of each CompiledMethod
// CompiledMethod
// CompiledMethod
// CompiledMethod
// CompiledMethod
// CompiledMethod
// ...
// CompiledMethod
//
class OatWriter {
public:
// Write an oat file. Returns true on success, false on failure.
static bool Create(File* file, const ClassLoader* class_loader,
const std::vector<const DexFile*>& dex_files, const Compiler& compiler);
private:
OatWriter(const std::vector<const DexFile*>& dex_files,
const ClassLoader* class_loader,
const Compiler& compiler);
~OatWriter();
size_t InitOatHeader();
size_t InitOatDexFiles(size_t offset);
size_t InitDexFiles(size_t offset);
size_t InitOatClasses(size_t offset);
size_t InitOatCode(size_t offset);
size_t InitOatCodeDexFiles(size_t offset);
size_t InitOatCodeDexFile(size_t offset,
size_t& oat_class_index,
const DexFile& dex_file);
size_t InitOatCodeClassDef(size_t offset,
size_t oat_class_index, size_t class_def_index,
const DexFile& dex_file,
const DexFile::ClassDef& class_def);
size_t InitOatCodeMethod(size_t offset, size_t oat_class_index, size_t class_def_index,
size_t class_def_method_index, bool is_native, bool is_static,
bool is_direct, uint32_t method_idx, const DexFile*);
bool Write(File* file);
bool WriteTables(File* file);
size_t WriteCode(File* file);
size_t WriteCodeDexFiles(File* file, size_t offset);
size_t WriteCodeDexFile(File* file, size_t offset, size_t& oat_class_index,
const DexFile& dex_file);
size_t WriteCodeClassDef(File* file, size_t offset, size_t oat_class_index,
const DexFile& dex_file, const DexFile::ClassDef& class_def);
size_t WriteCodeMethod(File* file, size_t offset, size_t oat_class_index,
size_t class_def_method_index, bool is_static, uint32_t method_idx,
const DexFile& dex_file);
void ReportWriteFailure(const char* what, uint32_t method_idx, const DexFile& dex_file,
File* f) const;
class OatDexFile {
public:
explicit OatDexFile(const DexFile& dex_file);
size_t SizeOf() const;
void UpdateChecksum(OatHeader& oat_header) const;
bool Write(File* file) const;
// data to write
uint32_t dex_file_location_size_;
const uint8_t* dex_file_location_data_;
uint32_t dex_file_checksum_;
uint32_t dex_file_offset_;
std::vector<uint32_t> methods_offsets_;
private:
DISALLOW_COPY_AND_ASSIGN(OatDexFile);
};
class OatClass {
public:
explicit OatClass(Class::Status status, uint32_t methods_count);
size_t SizeOf() const;
void UpdateChecksum(OatHeader& oat_header) const;
bool Write(File* file) const;
// data to write
Class::Status status_;
std::vector<OatMethodOffsets> method_offsets_;
private:
DISALLOW_COPY_AND_ASSIGN(OatClass);
};
const Compiler* compiler_;
// TODO: remove the ClassLoader when the code storage moves out of Method
const ClassLoader* class_loader_;
// note OatFile does not take ownership of the DexFiles
const std::vector<const DexFile*>* dex_files_;
// data to write
OatHeader* oat_header_;
std::vector<OatDexFile*> oat_dex_files_;
std::vector<OatClass*> oat_classes_;
uint32_t executable_offset_padding_length_;
template <class T> struct MapCompare {
public:
bool operator() (const T* const &a, const T* const &b) const {
return *a < *b;
}
};
// code mappings for deduplication
std::map<const std::vector<uint8_t>*, uint32_t, MapCompare<std::vector<uint8_t> > > code_offsets_;
std::map<const std::vector<uint16_t>*, uint32_t, MapCompare<std::vector<uint16_t> > > vmap_table_offsets_;
std::map<const std::vector<uint32_t>*, uint32_t, MapCompare<std::vector<uint32_t> > > mapping_table_offsets_;
std::map<const std::vector<uint8_t>*, uint32_t, MapCompare<std::vector<uint8_t> > > gc_map_offsets_;
DISALLOW_COPY_AND_ASSIGN(OatWriter);
};
} // namespace art
#endif // ART_SRC_OAT_WRITER_H_