src/oat_file.h - platform/art - Git at Google

 /*
  * 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_FILE_H_
 #define ART_SRC_OAT_FILE_H_

 #include <vector>

 #include "dex_file.h"
 #include "invoke_type.h"
 #include "mem_map.h"
 #include "oat.h"
 #include "object.h"

 namespace art {

 class OatFile {
  public:
   enum RelocationBehavior {
     kRelocNone,
     kRelocAll,
   };

   // Returns an OatFile name based on a DexFile location
   static std::string DexFilenameToOatFilename(const std::string& location);

   // Open an oat file. Returns NULL on failure.  Requested base can
   // optionally be used to request where the file should be loaded.
   static OatFile* Open(const std::string& filename,
                        const std::string& location,
                        byte* requested_base,
                        RelocationBehavior reloc,
                        bool writable = false);

   // Open an oat file from an already opened File with the given location.
   static OatFile* Open(File& file,
                        const std::string& location,
                        byte* requested_base,
                        RelocationBehavior reloc,
                        bool writable = false);

   ~OatFile();

   const std::string& GetLocation() const {
     return location_;
   }

   const OatHeader& GetOatHeader() const;

   class OatDexFile;

   class OatMethod {
    public:
     // Link Method for execution using the contents of this OatMethod
     void LinkMethodPointers(AbstractMethod* method) const;

     // Link Method for image writing using the contents of this OatMethod
     void LinkMethodOffsets(AbstractMethod* method) const;

     uint32_t GetCodeOffset() const {
       return code_offset_;
     }
     size_t GetFrameSizeInBytes() const {
       return frame_size_in_bytes_;
     }
     uint32_t GetCoreSpillMask() const {
       return core_spill_mask_;
     }
     uint32_t GetFpSpillMask() const {
       return fp_spill_mask_;
     }
     uint32_t GetMappingTableOffset() const {
       return mapping_table_offset_;
     }
     uint32_t GetVmapTableOffset() const {
       return vmap_table_offset_;
     }
     uint32_t GetNativeGcMapOffset() const {
       return native_gc_map_offset_;
     }
     uint32_t GetInvokeStubOffset() const {
       return invoke_stub_offset_;
     }

     const void* GetCode() const;
     uint32_t GetCodeSize() const;

     const uint32_t* GetMappingTable() const {
       return GetOatPointer<const uint32_t*>(mapping_table_offset_);
     }
     const uint16_t* GetVmapTable() const {
       return GetOatPointer<const uint16_t*>(vmap_table_offset_);
     }
     const uint8_t* GetNativeGcMap() const {
       return GetOatPointer<const uint8_t*>(native_gc_map_offset_);
     }

     AbstractMethod::InvokeStub* GetInvokeStub() const;
     uint32_t GetInvokeStubSize() const;

 #if defined(ART_USE_LLVM_COMPILER)
     const void* GetProxyStub() const;
 #endif

     ~OatMethod();

     // Create an OatMethod with offsets relative to the given base address
     OatMethod(const byte* base,
               const uint32_t code_offset,
               const size_t frame_size_in_bytes,
               const uint32_t core_spill_mask,
               const uint32_t fp_spill_mask,
               const uint32_t mapping_table_offset,
               const uint32_t vmap_table_offset,
               const uint32_t gc_map_offset,
               const uint32_t invoke_stub_offset
 #if defined(ART_USE_LLVM_COMPILER)
             , const uint32_t proxy_stub_offset
 #endif
               );

    private:
     template<class T>
     T GetOatPointer(uint32_t offset) const {
       if (offset == 0) {
         return NULL;
       }
       return reinterpret_cast<T>(begin_ + offset);
     }

     const byte* begin_;

     uint32_t code_offset_;
     size_t frame_size_in_bytes_;
     uint32_t core_spill_mask_;
     uint32_t fp_spill_mask_;
     uint32_t mapping_table_offset_;
     uint32_t vmap_table_offset_;
     uint32_t native_gc_map_offset_;
     uint32_t invoke_stub_offset_;

 #if defined(ART_USE_LLVM_COMPILER)
     uint32_t proxy_stub_offset_;
 #endif

     friend class OatClass;
   };

   class OatClass {
    public:
     Class::Status GetStatus() const;

     // get the OatMethod entry based on its index into the class
     // defintion. direct methods come first, followed by virtual
     // methods. note that runtime created methods such as miranda
     // methods are not included.
     const OatMethod GetOatMethod(uint32_t method_index) const;
     ~OatClass();

    private:
     OatClass(const OatFile* oat_file,
              Class::Status status,
              const OatMethodOffsets* methods_pointer);

     const OatFile* oat_file_;
     const Class::Status status_;
     const OatMethodOffsets* methods_pointer_;

     friend class OatDexFile;
   };

   class OatDexFile {
    public:
     const DexFile* OpenDexFile() const;
     const OatClass* GetOatClass(uint32_t class_def_index) const;
     size_t FileSize() const;

     const std::string& GetDexFileLocation() const {
       return dex_file_location_;
     }

     uint32_t GetDexFileLocationChecksum() const {
       return dex_file_location_checksum_;
     }

     ~OatDexFile();

    private:
     OatDexFile(const OatFile* oat_file,
                const std::string& dex_file_location,
                uint32_t dex_file_checksum,
                byte* dex_file_pointer,
                const uint32_t* oat_class_offsets_pointer);

     const OatFile* oat_file_;
     std::string dex_file_location_;
     uint32_t dex_file_location_checksum_;
     const byte* dex_file_pointer_;
     const uint32_t* oat_class_offsets_pointer_;

     friend class OatFile;
     DISALLOW_COPY_AND_ASSIGN(OatDexFile);
   };

   const OatDexFile* GetOatDexFile(const std::string& dex_file_location,
                                   bool warn_if_not_found = true) const;
   std::vector<const OatDexFile*> GetOatDexFiles() const;

   size_t Size() const {
     return End() - Begin();
   }

   void RelocateExecutable();

  private:
   explicit OatFile(const std::string& filename);
   bool Map(File& file, byte* requested_base, RelocationBehavior reloc, bool writable);

   const byte* Begin() const;
   const byte* End() const;

   // The oat file name.
   //
   // The image will embed this to link its associated oat file.
   const std::string location_;

   // backing memory map for oat file
   UniquePtr<MemMap> mem_map_;

   typedef SafeMap<std::string, const OatDexFile*> Table;
   Table oat_dex_files_;

   friend class OatClass;
   friend class OatDexFile;
   friend class OatDumper;  // For GetBase and GetLimit
   DISALLOW_COPY_AND_ASSIGN(OatFile);
 };

 }  // namespace art

 #endif  // ART_SRC_OAT_WRITER_H_
	/*
	* 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_FILE_H_
	#define ART_SRC_OAT_FILE_H_

	#include <vector>

	#include "dex_file.h"
	#include "invoke_type.h"
	#include "mem_map.h"
	#include "oat.h"
	#include "object.h"

	namespace art {

	class OatFile {
	public:
	enum RelocationBehavior {
	kRelocNone,
	kRelocAll,
	};

	// Returns an OatFile name based on a DexFile location
	static std::string DexFilenameToOatFilename(const std::string& location);

	// Open an oat file. Returns NULL on failure. Requested base can
	// optionally be used to request where the file should be loaded.
	static OatFile* Open(const std::string& filename,
	const std::string& location,
	byte* requested_base,
	RelocationBehavior reloc,
	bool writable = false);

	// Open an oat file from an already opened File with the given location.
	static OatFile* Open(File& file,
	const std::string& location,
	byte* requested_base,
	RelocationBehavior reloc,
	bool writable = false);

	~OatFile();

	const std::string& GetLocation() const {
	return location_;
	}

	const OatHeader& GetOatHeader() const;

	class OatDexFile;

	class OatMethod {
	public:
	// Link Method for execution using the contents of this OatMethod
	void LinkMethodPointers(AbstractMethod* method) const;

	// Link Method for image writing using the contents of this OatMethod
	void LinkMethodOffsets(AbstractMethod* method) const;

	uint32_t GetCodeOffset() const {
	return code_offset_;
	}
	size_t GetFrameSizeInBytes() const {
	return frame_size_in_bytes_;
	}
	uint32_t GetCoreSpillMask() const {
	return core_spill_mask_;
	}
	uint32_t GetFpSpillMask() const {
	return fp_spill_mask_;
	}
	uint32_t GetMappingTableOffset() const {
	return mapping_table_offset_;
	}
	uint32_t GetVmapTableOffset() const {
	return vmap_table_offset_;
	}
	uint32_t GetNativeGcMapOffset() const {
	return native_gc_map_offset_;
	}
	uint32_t GetInvokeStubOffset() const {
	return invoke_stub_offset_;
	}

	const void* GetCode() const;
	uint32_t GetCodeSize() const;

	const uint32_t* GetMappingTable() const {
	return GetOatPointer<const uint32_t*>(mapping_table_offset_);
	}
	const uint16_t* GetVmapTable() const {
	return GetOatPointer<const uint16_t*>(vmap_table_offset_);
	}
	const uint8_t* GetNativeGcMap() const {
	return GetOatPointer<const uint8_t*>(native_gc_map_offset_);
	}

	AbstractMethod::InvokeStub* GetInvokeStub() const;
	uint32_t GetInvokeStubSize() const;

	#if defined(ART_USE_LLVM_COMPILER)
	const void* GetProxyStub() const;
	#endif

	~OatMethod();

	// Create an OatMethod with offsets relative to the given base address
	OatMethod(const byte* base,
	const uint32_t code_offset,
	const size_t frame_size_in_bytes,
	const uint32_t core_spill_mask,
	const uint32_t fp_spill_mask,
	const uint32_t mapping_table_offset,
	const uint32_t vmap_table_offset,
	const uint32_t gc_map_offset,
	const uint32_t invoke_stub_offset
	#if defined(ART_USE_LLVM_COMPILER)
	, const uint32_t proxy_stub_offset
	#endif
	);

	private:
	template<class T>
	T GetOatPointer(uint32_t offset) const {
	if (offset == 0) {
	return NULL;
	}
	return reinterpret_cast<T>(begin_ + offset);
	}

	const byte* begin_;

	uint32_t code_offset_;
	size_t frame_size_in_bytes_;
	uint32_t core_spill_mask_;
	uint32_t fp_spill_mask_;
	uint32_t mapping_table_offset_;
	uint32_t vmap_table_offset_;
	uint32_t native_gc_map_offset_;
	uint32_t invoke_stub_offset_;

	#if defined(ART_USE_LLVM_COMPILER)
	uint32_t proxy_stub_offset_;
	#endif

	friend class OatClass;
	};

	class OatClass {
	public:
	Class::Status GetStatus() const;

	// get the OatMethod entry based on its index into the class
	// defintion. direct methods come first, followed by virtual
	// methods. note that runtime created methods such as miranda
	// methods are not included.
	const OatMethod GetOatMethod(uint32_t method_index) const;
	~OatClass();

	private:
	OatClass(const OatFile* oat_file,
	Class::Status status,
	const OatMethodOffsets* methods_pointer);

	const OatFile* oat_file_;
	const Class::Status status_;
	const OatMethodOffsets* methods_pointer_;

	friend class OatDexFile;
	};

	class OatDexFile {
	public:
	const DexFile* OpenDexFile() const;
	const OatClass* GetOatClass(uint32_t class_def_index) const;
	size_t FileSize() const;

	const std::string& GetDexFileLocation() const {
	return dex_file_location_;
	}

	uint32_t GetDexFileLocationChecksum() const {
	return dex_file_location_checksum_;
	}

	~OatDexFile();

	private:
	OatDexFile(const OatFile* oat_file,
	const std::string& dex_file_location,
	uint32_t dex_file_checksum,
	byte* dex_file_pointer,
	const uint32_t* oat_class_offsets_pointer);

	const OatFile* oat_file_;
	std::string dex_file_location_;
	uint32_t dex_file_location_checksum_;
	const byte* dex_file_pointer_;
	const uint32_t* oat_class_offsets_pointer_;

	friend class OatFile;
	DISALLOW_COPY_AND_ASSIGN(OatDexFile);
	};

	const OatDexFile* GetOatDexFile(const std::string& dex_file_location,
	bool warn_if_not_found = true) const;
	std::vector<const OatDexFile*> GetOatDexFiles() const;

	size_t Size() const {
	return End() - Begin();
	}

	void RelocateExecutable();

	private:
	explicit OatFile(const std::string& filename);
	bool Map(File& file, byte* requested_base, RelocationBehavior reloc, bool writable);

	const byte* Begin() const;
	const byte* End() const;

	// The oat file name.
	//
	// The image will embed this to link its associated oat file.
	const std::string location_;

	// backing memory map for oat file
	UniquePtr<MemMap> mem_map_;

	typedef SafeMap<std::string, const OatDexFile*> Table;
	Table oat_dex_files_;

	friend class OatClass;
	friend class OatDexFile;
	friend class OatDumper; // For GetBase and GetLimit
	DISALLOW_COPY_AND_ASSIGN(OatFile);
	};

	} // namespace art

	#endif // ART_SRC_OAT_WRITER_H_