runtime/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_RUNTIME_OAT_FILE_H_
 #define ART_RUNTIME_OAT_FILE_H_

 #include <string>
 #include <vector>

 #include "base/stringpiece.h"
 #include "dex_file.h"
 #include "invoke_type.h"
 #include "mem_map.h"
 #include "mirror/art_method.h"
 #include "oat.h"
 #include "os.h"

 namespace art {

 class BitVector;
 class ElfFile;
 class MemMap;
 class OatMethodOffsets;
 class OatHeader;

 class OatFile {
  public:
   // 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,
                        bool executable,
                        std::string* error_msg);

   // Open an oat file from an already opened File.
   // Does not use dlopen underneath so cannot be used for runtime use
   // where relocations may be required. Currently used from
   // ImageWriter which wants to open a writable version from an existing
   // file descriptor for patching.
   static OatFile* OpenWritable(File* file, const std::string& location, std::string* error_msg);

   // Open an oat file backed by a std::vector with the given location.
   static OatFile* OpenMemory(std::vector<uint8_t>& oat_contents,
                              const std::string& location,
                              std::string* error_msg);

   ~OatFile();

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

   const OatHeader& GetOatHeader() const;

   class OatDexFile;

   class OatMethod {
    public:
     void LinkMethod(mirror::ArtMethod* method) const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);

     uint32_t GetCodeOffset() const {
       return code_offset_;
     }
     uint32_t GetNativeGcMapOffset() const {
       return native_gc_map_offset_;
     }

     const void* GetPortableCode() const {
       // TODO: encode whether code is portable/quick in flags within OatMethod.
       if (kUsePortableCompiler) {
         return GetOatPointer<const void*>(code_offset_);
       } else {
         return nullptr;
       }
     }

     const void* GetQuickCode() const {
       if (kUsePortableCompiler) {
         return nullptr;
       } else {
         return GetOatPointer<const void*>(code_offset_);
       }
     }

     uint32_t GetPortableCodeSize() const {
       // TODO: With Quick, we store the size before the code. With Portable, the code is in a .o
       // file we don't manage ourselves. ELF symbols do have a concept of size, so we could capture
       // that and store it somewhere, such as the OatMethod.
       return 0;
     }
     uint32_t GetQuickCodeSize() const;

     const uint8_t* GetNativeGcMap() const {
       return GetOatPointer<const uint8_t*>(native_gc_map_offset_);
     }

     size_t GetFrameSizeInBytes() const;
     uint32_t GetCoreSpillMask() const;
     uint32_t GetFpSpillMask() const;
     uint32_t GetMappingTableOffset() const;
     uint32_t GetVmapTableOffset() const;
     const uint8_t* GetMappingTable() const;
     const uint8_t* GetVmapTable() const;

     ~OatMethod();

     // Create an OatMethod with offsets relative to the given base address
     OatMethod(const byte* base,
               const uint32_t code_offset,
               const uint32_t gc_map_offset);

    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_;
     uint32_t native_gc_map_offset_;

     friend class OatClass;
   };

   class OatClass {
    public:
     mirror::Class::Status GetStatus() const {
       return status_;
     }

     OatClassType GetType() const {
       return type_;
     }

     // 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;

    private:
     OatClass(const OatFile* oat_file,
              mirror::Class::Status status,
              OatClassType type,
              uint32_t bitmap_size,
              const uint32_t* bitmap_pointer,
              const OatMethodOffsets* methods_pointer);

     const OatFile* const oat_file_;

     const mirror::Class::Status status_;

     const OatClassType type_;

     const uint32_t* const bitmap_;

     const OatMethodOffsets* methods_pointer_;

     friend class OatDexFile;
   };

   class OatDexFile {
    public:
     // Opens the DexFile referred to by this OatDexFile from within the containing OatFile.
     const DexFile* OpenDexFile(std::string* error_msg) const;

     // Returns the size of the DexFile refered to by this OatDexFile.
     size_t FileSize() const;

     // Returns original path of DexFile that was the source of this OatDexFile.
     const std::string& GetDexFileLocation() const {
       return dex_file_location_;
     }

     // Returns checksum of original DexFile that was the source of this OatDexFile;
     uint32_t GetDexFileLocationChecksum() const {
       return dex_file_location_checksum_;
     }

     // Returns the OatClass for the class specified by the given DexFile class_def_index.
     OatClass GetOatClass(uint16_t class_def_index) const;

     ~OatDexFile();

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

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

     friend class OatFile;
     DISALLOW_COPY_AND_ASSIGN(OatDexFile);
   };

   const OatDexFile* GetOatDexFile(const char* dex_location,
                                   const uint32_t* const dex_location_checksum,
                                   bool exception_if_not_found = true) const;

   std::vector<const OatDexFile*> GetOatDexFiles() const;

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

  private:
   static void CheckLocation(const std::string& location);

   static OatFile* OpenDlopen(const std::string& elf_filename,
                              const std::string& location,
                              byte* requested_base,
                              std::string* error_msg);

   static OatFile* OpenElfFile(File* file,
                               const std::string& location,
                               byte* requested_base,
                               bool writable,
                               bool executable,
                               std::string* error_msg);

   explicit OatFile(const std::string& filename);
   bool Dlopen(const std::string& elf_filename, byte* requested_base, std::string* error_msg);
   bool ElfFileOpen(File* file, byte* requested_base, bool writable, bool executable,
                    std::string* error_msg);
   bool Setup(std::string* error_msg);

   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_;

   // Pointer to OatHeader.
   const byte* begin_;

   // Pointer to end of oat region for bounds checking.
   const byte* end_;

   // Backing memory map for oat file during when opened by ElfWriter during initial compilation.
   std::unique_ptr<MemMap> mem_map_;

   // Backing memory map for oat file during cross compilation.
   std::unique_ptr<ElfFile> elf_file_;

   // dlopen handle during runtime.
   void* dlopen_handle_;

   // NOTE: We use a StringPiece as the key type to avoid a memory allocation on every lookup
   // with a const char* key.
   typedef SafeMap<StringPiece, 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_RUNTIME_OAT_FILE_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_RUNTIME_OAT_FILE_H_
	#define ART_RUNTIME_OAT_FILE_H_

	#include <string>
	#include <vector>

	#include "base/stringpiece.h"
	#include "dex_file.h"
	#include "invoke_type.h"
	#include "mem_map.h"
	#include "mirror/art_method.h"
	#include "oat.h"
	#include "os.h"

	namespace art {

	class BitVector;
	class ElfFile;
	class MemMap;
	class OatMethodOffsets;
	class OatHeader;

	class OatFile {
	public:
	// 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,
	bool executable,
	std::string* error_msg);

	// Open an oat file from an already opened File.
	// Does not use dlopen underneath so cannot be used for runtime use
	// where relocations may be required. Currently used from
	// ImageWriter which wants to open a writable version from an existing
	// file descriptor for patching.
	static OatFile* OpenWritable(File* file, const std::string& location, std::string* error_msg);

	// Open an oat file backed by a std::vector with the given location.
	static OatFile* OpenMemory(std::vector<uint8_t>& oat_contents,
	const std::string& location,
	std::string* error_msg);

	~OatFile();

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

	const OatHeader& GetOatHeader() const;

	class OatDexFile;

	class OatMethod {
	public:
	void LinkMethod(mirror::ArtMethod* method) const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);

	uint32_t GetCodeOffset() const {
	return code_offset_;
	}
	uint32_t GetNativeGcMapOffset() const {
	return native_gc_map_offset_;
	}

	const void* GetPortableCode() const {
	// TODO: encode whether code is portable/quick in flags within OatMethod.
	if (kUsePortableCompiler) {
	return GetOatPointer<const void*>(code_offset_);
	} else {
	return nullptr;
	}
	}

	const void* GetQuickCode() const {
	if (kUsePortableCompiler) {
	return nullptr;
	} else {
	return GetOatPointer<const void*>(code_offset_);
	}
	}

	uint32_t GetPortableCodeSize() const {
	// TODO: With Quick, we store the size before the code. With Portable, the code is in a .o
	// file we don't manage ourselves. ELF symbols do have a concept of size, so we could capture
	// that and store it somewhere, such as the OatMethod.
	return 0;
	}
	uint32_t GetQuickCodeSize() const;

	const uint8_t* GetNativeGcMap() const {
	return GetOatPointer<const uint8_t*>(native_gc_map_offset_);
	}

	size_t GetFrameSizeInBytes() const;
	uint32_t GetCoreSpillMask() const;
	uint32_t GetFpSpillMask() const;
	uint32_t GetMappingTableOffset() const;
	uint32_t GetVmapTableOffset() const;
	const uint8_t* GetMappingTable() const;
	const uint8_t* GetVmapTable() const;

	~OatMethod();

	// Create an OatMethod with offsets relative to the given base address
	OatMethod(const byte* base,
	const uint32_t code_offset,
	const uint32_t gc_map_offset);

	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_;
	uint32_t native_gc_map_offset_;

	friend class OatClass;
	};

	class OatClass {
	public:
	mirror::Class::Status GetStatus() const {
	return status_;
	}

	OatClassType GetType() const {
	return type_;
	}

	// 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;

	private:
	OatClass(const OatFile* oat_file,
	mirror::Class::Status status,
	OatClassType type,
	uint32_t bitmap_size,
	const uint32_t* bitmap_pointer,
	const OatMethodOffsets* methods_pointer);

	const OatFile* const oat_file_;

	const mirror::Class::Status status_;

	const OatClassType type_;

	const uint32_t* const bitmap_;

	const OatMethodOffsets* methods_pointer_;

	friend class OatDexFile;
	};

	class OatDexFile {
	public:
	// Opens the DexFile referred to by this OatDexFile from within the containing OatFile.
	const DexFile* OpenDexFile(std::string* error_msg) const;

	// Returns the size of the DexFile refered to by this OatDexFile.
	size_t FileSize() const;

	// Returns original path of DexFile that was the source of this OatDexFile.
	const std::string& GetDexFileLocation() const {
	return dex_file_location_;
	}

	// Returns checksum of original DexFile that was the source of this OatDexFile;
	uint32_t GetDexFileLocationChecksum() const {
	return dex_file_location_checksum_;
	}

	// Returns the OatClass for the class specified by the given DexFile class_def_index.
	OatClass GetOatClass(uint16_t class_def_index) const;

	~OatDexFile();

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

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

	friend class OatFile;
	DISALLOW_COPY_AND_ASSIGN(OatDexFile);
	};

	const OatDexFile* GetOatDexFile(const char* dex_location,
	const uint32_t* const dex_location_checksum,
	bool exception_if_not_found = true) const;

	std::vector<const OatDexFile*> GetOatDexFiles() const;

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

	private:
	static void CheckLocation(const std::string& location);

	static OatFile* OpenDlopen(const std::string& elf_filename,
	const std::string& location,
	byte* requested_base,
	std::string* error_msg);

	static OatFile* OpenElfFile(File* file,
	const std::string& location,
	byte* requested_base,
	bool writable,
	bool executable,
	std::string* error_msg);

	explicit OatFile(const std::string& filename);
	bool Dlopen(const std::string& elf_filename, byte* requested_base, std::string* error_msg);
	bool ElfFileOpen(File* file, byte* requested_base, bool writable, bool executable,
	std::string* error_msg);
	bool Setup(std::string* error_msg);

	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_;

	// Pointer to OatHeader.
	const byte* begin_;

	// Pointer to end of oat region for bounds checking.
	const byte* end_;

	// Backing memory map for oat file during when opened by ElfWriter during initial compilation.
	std::unique_ptr<MemMap> mem_map_;

	// Backing memory map for oat file during cross compilation.
	std::unique_ptr<ElfFile> elf_file_;

	// dlopen handle during runtime.
	void* dlopen_handle_;

	// NOTE: We use a StringPiece as the key type to avoid a memory allocation on every lookup
	// with a const char* key.
	typedef SafeMap<StringPiece, 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_RUNTIME_OAT_FILE_H_