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/*
* Copyright (C) 2015 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_MANAGER_H_
#define ART_RUNTIME_OAT_FILE_MANAGER_H_
#include <memory>
#include <set>
#include <string>
#include <unordered_map>
#include <vector>
#include "base/macros.h"
#include "base/mutex.h"
namespace art {
namespace gc {
namespace space {
class ImageSpace;
} // namespace space
} // namespace gc
class DexFile;
class OatFile;
// Class for dealing with oat file management.
//
// This class knows about all the loaded oat files and provides utility functions. The oat file
// pointers returned from functions are always valid.
class OatFileManager {
public:
OatFileManager() : have_non_pic_oat_file_(false) {}
~OatFileManager();
// Add an oat file to the internal accounting, std::aborts if there already exists an oat file
// with the same base address. Returns the oat file pointer from oat_file.
const OatFile* RegisterOatFile(std::unique_ptr<const OatFile> oat_file)
REQUIRES(!Locks::oat_file_manager_lock_);
void UnRegisterAndDeleteOatFile(const OatFile* oat_file)
REQUIRES(!Locks::oat_file_manager_lock_);
// Find the first opened oat file with the same location, returns null if there are none.
const OatFile* FindOpenedOatFileFromOatLocation(const std::string& oat_location) const
REQUIRES(!Locks::oat_file_manager_lock_);
// Attempt to reserve a location, returns false if it is already reserved or already in used by
// an oat file.
bool RegisterOatFileLocation(const std::string& oat_location)
REQUIRES(!Locks::oat_file_count_lock_);
// Unreserve oat file location, should only be used for error cases since RegisterOatFile will
// remove the reserved location.
void UnRegisterOatFileLocation(const std::string& oat_location)
REQUIRES(!Locks::oat_file_count_lock_);
// Returns true if we have a non pic oat file.
bool HaveNonPicOatFile() const {
return have_non_pic_oat_file_;
}
// Returns the boot image oat file.
const OatFile* GetBootOatFile() const;
// Returns the first non-image oat file in the class path.
const OatFile* GetPrimaryOatFile() const REQUIRES(!Locks::oat_file_manager_lock_);
// Return the oat file for an image, registers the oat file. Takes ownership of the imagespace's
// underlying oat file.
const OatFile* RegisterImageOatFile(gc::space::ImageSpace* space)
REQUIRES(!Locks::oat_file_manager_lock_);
// Finds or creates the oat file holding dex_location. Then loads and returns
// all corresponding dex files (there may be more than one dex file loaded
// in the case of multidex).
// This may return the original, unquickened dex files if the oat file could
// not be generated.
//
// Returns an empty vector if the dex files could not be loaded. In this
// case, there will be at least one error message returned describing why no
// dex files could not be loaded. The 'error_msgs' argument must not be
// null, regardless of whether there is an error or not.
//
// This method should not be called with the mutator_lock_ held, because it
// could end up starving GC if we need to generate or relocate any oat
// files.
std::vector<std::unique_ptr<const DexFile>> OpenDexFilesFromOat(
const char* dex_location,
const char* oat_location,
/*out*/ const OatFile** out_oat_file,
/*out*/ std::vector<std::string>* error_msgs)
REQUIRES(!Locks::oat_file_manager_lock_, !Locks::mutator_lock_);
private:
// Check for duplicate class definitions of the given oat file against all open oat files.
// Return true if there are any class definition collisions in the oat_file.
bool HasCollisions(const OatFile* oat_file, /*out*/std::string* error_msg) const
REQUIRES(!Locks::oat_file_manager_lock_);
const OatFile* FindOpenedOatFileFromOatLocationLocked(const std::string& oat_location) const
REQUIRES(Locks::oat_file_manager_lock_);
std::set<std::unique_ptr<const OatFile>> oat_files_ GUARDED_BY(Locks::oat_file_manager_lock_);
std::unordered_map<std::string, size_t> oat_file_count_ GUARDED_BY(Locks::oat_file_count_lock_);
bool have_non_pic_oat_file_;
DISALLOW_COPY_AND_ASSIGN(OatFileManager);
};
} // namespace art
#endif // ART_RUNTIME_OAT_FILE_MANAGER_H_
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