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/*
* 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_GC_SPACE_IMAGE_SPACE_H_
#define ART_RUNTIME_GC_SPACE_IMAGE_SPACE_H_
#include "space.h"
namespace art {
class OatFile;
namespace gc {
namespace space {
// An image space is a space backed with a memory mapped image.
class ImageSpace : public MemMapSpace {
public:
bool CanAllocateInto() const {
return false;
}
SpaceType GetType() const {
return kSpaceTypeImageSpace;
}
// Create a Space from an image file. Cannot be used for future
// allocation or collected.
//
// Create also opens the OatFile associated with the image file so
// that it be contiguously allocated with the image before the
// creation of the alloc space. The ReleaseOatFile will later be
// used to transfer ownership of the OatFile to the ClassLinker when
// it is initialized.
static ImageSpace* Create(const std::string& image)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
// Releases the OatFile from the ImageSpace so it can be transfer to
// the caller, presumably the ClassLinker.
OatFile& ReleaseOatFile()
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
const ImageHeader& GetImageHeader() const {
return *reinterpret_cast<ImageHeader*>(Begin());
}
const std::string GetImageFilename() const {
return GetName();
}
// Mark the objects defined in this space in the given live bitmap
void RecordImageAllocations(accounting::SpaceBitmap* live_bitmap) const
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
accounting::SpaceBitmap* GetLiveBitmap() const {
return live_bitmap_.get();
}
accounting::SpaceBitmap* GetMarkBitmap() const {
// ImageSpaces have the same bitmap for both live and marked. This helps reduce the number of
// special cases to test against.
return live_bitmap_.get();
}
void Dump(std::ostream& os) const;
private:
// Tries to initialize an ImageSpace from the given image path,
// returning NULL on error.
//
// If validate_oat_file is false (for /system), do not verify that
// image's OatFile is up-to-date relative to its DexFile
// inputs. Otherwise (for /data), validate the inputs and generate
// the OatFile in /data/dalvik-cache if necessary.
static ImageSpace* Init(const std::string& image, bool validate_oat_file)
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
OatFile* OpenOatFile() const
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
bool ValidateOatFile() const
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
friend class Space;
static size_t bitmap_index_;
UniquePtr<accounting::SpaceBitmap> live_bitmap_;
ImageSpace(const std::string& name, MemMap* mem_map);
// The OatFile associated with the image during early startup to
// reserve space contiguous to the image. It is later released to
// the ClassLinker during it's initialization.
UniquePtr<OatFile> oat_file_;
DISALLOW_COPY_AND_ASSIGN(ImageSpace);
};
} // namespace space
} // namespace gc
} // namespace art
#endif // ART_RUNTIME_GC_SPACE_IMAGE_SPACE_H_
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