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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_IMAGE_H_
#define ART_RUNTIME_IMAGE_H_
#include <string.h>
#include "globals.h"
#include "mirror/object.h"
namespace art {
// header of image files written by ImageWriter, read and validated by Space.
class PACKED(4) ImageHeader {
public:
ImageHeader() {}
ImageHeader(uint32_t image_begin,
uint32_t image_roots,
uint32_t oat_checksum,
uint32_t oat_file_begin,
uint32_t oat_data_begin,
uint32_t oat_data_end,
uint32_t oat_file_end);
bool IsValid() const {
if (memcmp(magic_, kImageMagic, sizeof(kImageMagic) != 0)) {
return false;
}
if (memcmp(version_, kImageVersion, sizeof(kImageVersion) != 0)) {
return false;
}
return true;
}
const char* GetMagic() const {
CHECK(IsValid());
return reinterpret_cast<const char*>(magic_);
}
byte* GetImageBegin() const {
return reinterpret_cast<byte*>(image_begin_);
}
uint32_t GetOatChecksum() const {
return oat_checksum_;
}
void SetOatChecksum(uint32_t oat_checksum) {
oat_checksum_ = oat_checksum;
}
byte* GetOatFileBegin() const {
return reinterpret_cast<byte*>(oat_file_begin_);
}
byte* GetOatDataBegin() const {
return reinterpret_cast<byte*>(oat_data_begin_);
}
byte* GetOatDataEnd() const {
return reinterpret_cast<byte*>(oat_data_end_);
}
byte* GetOatFileEnd() const {
return reinterpret_cast<byte*>(oat_file_end_);
}
enum ImageRoot {
kResolutionMethod,
kCalleeSaveMethod,
kRefsOnlySaveMethod,
kRefsAndArgsSaveMethod,
kOatLocation,
kDexCaches,
kClassRoots,
kImageRootsMax,
};
mirror::Object* GetImageRoot(ImageRoot image_root) const
SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
private:
mirror::ObjectArray<mirror::Object>* GetImageRoots() const;
static const byte kImageMagic[4];
static const byte kImageVersion[4];
byte magic_[4];
byte version_[4];
// Required base address for mapping the image.
uint32_t image_begin_;
// Checksum of the oat file we link to for load time sanity check.
uint32_t oat_checksum_;
// Start address for oat file. Will be before oat_data_begin_ for .so files.
uint32_t oat_file_begin_;
// Required oat address expected by image Method::GetCode() pointers.
uint32_t oat_data_begin_;
// End of oat data address range for this image file.
uint32_t oat_data_end_;
// End of oat file address range. will be after oat_data_end_ for
// .so files. Used for positioning a following alloc spaces.
uint32_t oat_file_end_;
// Absolute address of an Object[] of objects needed to reinitialize from an image.
uint32_t image_roots_;
friend class ImageWriter;
friend class ImageDumper; // For GetImageRoots()
};
} // namespace art
#endif // ART_RUNTIME_IMAGE_H_
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