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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ART_COMPILER_ELF_WRITER_H_
     18 #define ART_COMPILER_ELF_WRITER_H_
     19 
     20 #include <stdint.h>
     21 #include <cstddef>
     22 #include <string>
     23 #include <vector>
     24 
     25 #include "base/macros.h"
     26 #include "base/mutex.h"
     27 #include "os.h"
     28 
     29 namespace art {
     30 
     31 class CompilerDriver;
     32 class DexFile;
     33 class ElfFile;
     34 class OatWriter;
     35 
     36 class ElfWriter {
     37  public:
     38   // Looks up information about location of oat file in elf file container.
     39   // Used for ImageWriter to perform memory layout.
     40   static void GetOatElfInformation(File* file,
     41                                    size_t* oat_loaded_size,
     42                                    size_t* oat_data_offset);
     43 
     44   // Returns runtime oat_data runtime address for an opened ElfFile.
     45   static uintptr_t GetOatDataAddress(ElfFile* elf_file);
     46 
     47   static bool Fixup(File* file, uintptr_t oat_data_begin);
     48 
     49  protected:
     50   ElfWriter(const CompilerDriver& driver, File* elf_file)
     51     : compiler_driver_(&driver), elf_file_(elf_file) {
     52   }
     53 
     54   virtual ~ElfWriter() {}
     55 
     56   virtual bool Write(OatWriter* oat_writer,
     57                      const std::vector<const DexFile*>& dex_files,
     58                      const std::string& android_root,
     59                      bool is_host)
     60       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) = 0;
     61 
     62   const CompilerDriver* const compiler_driver_;
     63   File* const elf_file_;
     64 };
     65 
     66 }  // namespace art
     67 
     68 #endif  // ART_COMPILER_ELF_WRITER_H_
     69