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// Copyright 2011 Google Inc. All Rights Reserved.
#ifndef ART_SRC_IMAGE_H_
#define ART_SRC_IMAGE_H_
#include <string.h>
#include "globals.h"
#include "object.h"
namespace art {
// header of image files written by ImageWriter, read and validated by Space.
class ImageHeader {
ImageHeader() {}
ImageHeader(uint32_t base_addr, uint32_t image_roots)
: base_addr_(base_addr), image_roots_(image_roots) {
memcpy(magic_, kImageMagic, sizeof(kImageMagic));
memcpy(version_, kImageVersion, sizeof(kImageVersion));
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 {
return reinterpret_cast<const char*>(magic_);
byte* GetBaseAddr() const {
return reinterpret_cast<byte*>(base_addr_);
enum ImageRoot {
Object* GetImageRoot(ImageRoot image_root) const {
return reinterpret_cast<ObjectArray<Object>*>(image_roots_)->Get(image_root);
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 base_addr_;
// absolute address of an Object[] of objects needed to reinitialize from an image
uint32_t image_roots_;
friend class ImageWriter;
} // namespace art
#endif // ART_SRC_IMAGE_H_