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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_MCLINKER_H_
     18 #define ART_COMPILER_ELF_WRITER_MCLINKER_H_
     19 
     20 #include "elf_writer.h"
     21 
     22 #include "UniquePtr.h"
     23 #include "safe_map.h"
     24 
     25 namespace mcld {
     26 class IRBuilder;
     27 class Input;
     28 class LDSection;
     29 class LDSymbol;
     30 class Linker;
     31 class LinkerConfig;
     32 class Module;
     33 }  // namespace mcld
     34 
     35 namespace art {
     36 
     37 class CompiledCode;
     38 
     39 class ElfWriterMclinker : public ElfWriter {
     40  public:
     41   // Write an ELF file. Returns true on success, false on failure.
     42   static bool Create(File* file,
     43                      OatWriter& oat_writer,
     44                      const std::vector<const DexFile*>& dex_files,
     45                      const std::string& android_root,
     46                      bool is_host,
     47                      const CompilerDriver& driver)
     48       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
     49 
     50  protected:
     51   virtual bool Write(OatWriter& oat_writer,
     52                      const std::vector<const DexFile*>& dex_files,
     53                      const std::string& android_root,
     54                      bool is_host)
     55       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
     56 
     57  private:
     58   ElfWriterMclinker(const CompilerDriver& driver, File* elf_file);
     59   ~ElfWriterMclinker();
     60 
     61   void Init();
     62   void AddOatInput(std::vector<uint8_t>& oat_contents);
     63   void AddMethodInputs(const std::vector<const DexFile*>& dex_files);
     64   void AddCompiledCodeInput(const CompiledCode& compiled_code);
     65   void AddRuntimeInputs(const std::string& android_root, bool is_host);
     66   bool Link();
     67 #if defined(ART_USE_PORTABLE_COMPILER)
     68   void FixupOatMethodOffsets(const std::vector<const DexFile*>& dex_files)
     69       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
     70   uint32_t FixupCompiledCodeOffset(ElfFile& elf_file,
     71                                    llvm::ELF::Elf32_Addr oatdata_address,
     72                                    const CompiledCode& compiled_code);
     73 #endif
     74 
     75   // Setup by Init()
     76   UniquePtr<mcld::LinkerConfig> linker_config_;
     77   UniquePtr<mcld::Module> module_;
     78   UniquePtr<mcld::IRBuilder> ir_builder_;
     79   UniquePtr<mcld::Linker> linker_;
     80 
     81   // Setup by AddOatInput()
     82   // TODO: ownership of oat_input_?
     83   mcld::Input* oat_input_;
     84 
     85   // Setup by AddCompiledCodeInput
     86   // set of symbols for already added mcld::Inputs
     87   SafeMap<const std::string*, const std::string*> added_symbols_;
     88 
     89   // Setup by FixupCompiledCodeOffset
     90   // map of symbol names to oatdata offset
     91   SafeMap<const std::string*, uint32_t> symbol_to_compiled_code_offset_;
     92 
     93   DISALLOW_IMPLICIT_CONSTRUCTORS(ElfWriterMclinker);
     94 };
     95 
     96 }  // namespace art
     97 
     98 #endif  // ART_COMPILER_ELF_WRITER_MCLINKER_H_
     99