runtime/gc/space/image_space.cc - SHIFTPHONES/android_art - Gitiles

 /*
  * 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.
  */

 #include "image_space.h"

 #include <sys/types.h>
 #include <sys/wait.h>

 #include "base/stl_util.h"
 #include "base/unix_file/fd_file.h"
 #include "gc/accounting/space_bitmap-inl.h"
 #include "mirror/abstract_method.h"
 #include "mirror/class-inl.h"
 #include "mirror/object-inl.h"
 #include "oat_file.h"
 #include "os.h"
 #include "runtime.h"
 #include "space-inl.h"
 #include "utils.h"

 namespace art {
 namespace gc {
 namespace space {

 size_t ImageSpace::bitmap_index_ = 0;

 ImageSpace::ImageSpace(const std::string& name, MemMap* mem_map)
 : MemMapSpace(name, mem_map, mem_map->Size(), kGcRetentionPolicyNeverCollect) {
   const size_t bitmap_index = bitmap_index_++;
   live_bitmap_.reset(accounting::SpaceBitmap::Create(
       StringPrintf("imagespace %s live-bitmap %d", name.c_str(), static_cast<int>(bitmap_index)),
       Begin(), Capacity()));
   DCHECK(live_bitmap_.get() != NULL) << "could not create imagespace live bitmap #" << bitmap_index;
 }

 static bool GenerateImage(const std::string& image_file_name) {
   const std::string boot_class_path_string(Runtime::Current()->GetBootClassPathString());
   std::vector<std::string> boot_class_path;
   Split(boot_class_path_string, ':', boot_class_path);
   if (boot_class_path.empty()) {
     LOG(FATAL) << "Failed to generate image because no boot class path specified";
   }

   std::vector<char*> arg_vector;

   std::string dex2oat_string(GetAndroidRoot());
   dex2oat_string += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat");
   const char* dex2oat = dex2oat_string.c_str();
   arg_vector.push_back(strdup(dex2oat));

   std::string image_option_string("--image=");
   image_option_string += image_file_name;
   const char* image_option = image_option_string.c_str();
   arg_vector.push_back(strdup(image_option));

   arg_vector.push_back(strdup("--runtime-arg"));
   arg_vector.push_back(strdup("-Xms64m"));

   arg_vector.push_back(strdup("--runtime-arg"));
   arg_vector.push_back(strdup("-Xmx64m"));

   for (size_t i = 0; i < boot_class_path.size(); i++) {
     std::string dex_file_option_string("--dex-file=");
     dex_file_option_string += boot_class_path[i];
     const char* dex_file_option = dex_file_option_string.c_str();
     arg_vector.push_back(strdup(dex_file_option));
   }

   std::string oat_file_option_string("--oat-file=");
   oat_file_option_string += image_file_name;
   oat_file_option_string.erase(oat_file_option_string.size() - 3);
   oat_file_option_string += "oat";
   const char* oat_file_option = oat_file_option_string.c_str();
   arg_vector.push_back(strdup(oat_file_option));

   std::string base_option_string(StringPrintf("--base=0x%x", ART_BASE_ADDRESS));
   arg_vector.push_back(strdup(base_option_string.c_str()));

   if (kIsTargetBuild) {
     arg_vector.push_back(strdup("--image-classes-zip=/system/framework/framework.jar"));
     arg_vector.push_back(strdup("--image-classes=preloaded-classes"));
   } else {
     arg_vector.push_back(strdup("--host"));
   }

   std::string command_line(Join(arg_vector, ' '));
   LOG(INFO) << "GenerateImage: " << command_line;

   arg_vector.push_back(NULL);
   char** argv = &arg_vector[0];

   // fork and exec dex2oat
   pid_t pid = fork();
   if (pid == 0) {
     // no allocation allowed between fork and exec

     // change process groups, so we don't get reaped by ProcessManager
     setpgid(0, 0);

     execv(dex2oat, argv);

     PLOG(FATAL) << "execv(" << dex2oat << ") failed";
     return false;
   } else {
     STLDeleteElements(&arg_vector);

     // wait for dex2oat to finish
     int status;
     pid_t got_pid = TEMP_FAILURE_RETRY(waitpid(pid, &status, 0));
     if (got_pid != pid) {
       PLOG(ERROR) << "waitpid failed: wanted " << pid << ", got " << got_pid;
       return false;
     }
     if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
       LOG(ERROR) << dex2oat << " failed: " << command_line;
       return false;
     }
   }
   return true;
 }

 ImageSpace* ImageSpace::Create(const std::string& original_image_file_name) {
   if (OS::FileExists(original_image_file_name.c_str())) {
     // If the /system file exists, it should be up-to-date, don't try to generate
     return space::ImageSpace::Init(original_image_file_name, false);
   }
   // If the /system file didn't exist, we need to use one from the dalvik-cache.
   // If the cache file exists, try to open, but if it fails, regenerate.
   // If it does not exist, generate.
   std::string image_file_name(GetDalvikCacheFilenameOrDie(original_image_file_name));
   if (OS::FileExists(image_file_name.c_str())) {
     space::ImageSpace* image_space = space::ImageSpace::Init(image_file_name, true);
     if (image_space != NULL) {
       return image_space;
     }
   }
   CHECK(GenerateImage(image_file_name)) << "Failed to generate image: " << image_file_name;
   return space::ImageSpace::Init(image_file_name, true);
 }

 ImageSpace* ImageSpace::Init(const std::string& image_file_name, bool validate_oat_file) {
   CHECK(!image_file_name.empty());

   uint64_t start_time = 0;
   if (VLOG_IS_ON(heap) || VLOG_IS_ON(startup)) {
     start_time = NanoTime();
     LOG(INFO) << "ImageSpace::Init entering image_file_name=" << image_file_name;
   }

   UniquePtr<File> file(OS::OpenFile(image_file_name.c_str(), false));
   if (file.get() == NULL) {
     LOG(ERROR) << "Failed to open " << image_file_name;
     return NULL;
   }
   ImageHeader image_header;
   bool success = file->ReadFully(&image_header, sizeof(image_header));
   if (!success || !image_header.IsValid()) {
     LOG(ERROR) << "Invalid image header " << image_file_name;
     return NULL;
   }
   UniquePtr<MemMap> map(MemMap::MapFileAtAddress(image_header.GetImageBegin(),
                                                  file->GetLength(),
                                                  PROT_READ | PROT_WRITE,
                                                  MAP_PRIVATE | MAP_FIXED,
                                                  file->Fd(),
                                                  0,
                                                  false));
   if (map.get() == NULL) {
     LOG(ERROR) << "Failed to map " << image_file_name;
     return NULL;
   }
   CHECK_EQ(image_header.GetImageBegin(), map->Begin());
   DCHECK_EQ(0, memcmp(&image_header, map->Begin(), sizeof(ImageHeader)));

   Runtime* runtime = Runtime::Current();
   mirror::Object* resolution_method = image_header.GetImageRoot(ImageHeader::kResolutionMethod);
   runtime->SetResolutionMethod(down_cast<mirror::AbstractMethod*>(resolution_method));

   mirror::Object* callee_save_method = image_header.GetImageRoot(ImageHeader::kCalleeSaveMethod);
   runtime->SetCalleeSaveMethod(down_cast<mirror::AbstractMethod*>(callee_save_method), Runtime::kSaveAll);
   callee_save_method = image_header.GetImageRoot(ImageHeader::kRefsOnlySaveMethod);
   runtime->SetCalleeSaveMethod(down_cast<mirror::AbstractMethod*>(callee_save_method), Runtime::kRefsOnly);
   callee_save_method = image_header.GetImageRoot(ImageHeader::kRefsAndArgsSaveMethod);
   runtime->SetCalleeSaveMethod(down_cast<mirror::AbstractMethod*>(callee_save_method), Runtime::kRefsAndArgs);

   UniquePtr<ImageSpace> space(new ImageSpace(image_file_name, map.release()));

   space->oat_file_.reset(space->OpenOatFile());
   if (space->oat_file_.get() == NULL) {
     LOG(ERROR) << "Failed to open oat file for image: " << image_file_name;
     return NULL;
   }

   if (validate_oat_file && !space->ValidateOatFile()) {
     LOG(WARNING) << "Failed to validate oat file for image: " << image_file_name;
     return NULL;
   }

   if (VLOG_IS_ON(heap) || VLOG_IS_ON(startup)) {
     LOG(INFO) << "ImageSpace::Init exiting (" << PrettyDuration(NanoTime() - start_time)
              << ") " << *space.get();
   }
   return space.release();
 }

 OatFile* ImageSpace::OpenOatFile() const {
   const Runtime* runtime = Runtime::Current();
   const ImageHeader& image_header = GetImageHeader();
   // Grab location but don't use Object::AsString as we haven't yet initialized the roots to
   // check the down cast
   mirror::String* oat_location =
       down_cast<mirror::String*>(image_header.GetImageRoot(ImageHeader::kOatLocation));
   std::string oat_filename;
   oat_filename += runtime->GetHostPrefix();
   oat_filename += oat_location->ToModifiedUtf8();
   OatFile* oat_file = OatFile::Open(oat_filename, oat_filename, image_header.GetOatDataBegin(),
                                     !Runtime::Current()->IsCompiler());
   if (oat_file == NULL) {
     LOG(ERROR) << "Failed to open oat file " << oat_filename << " referenced from image.";
     return NULL;
   }
   uint32_t oat_checksum = oat_file->GetOatHeader().GetChecksum();
   uint32_t image_oat_checksum = image_header.GetOatChecksum();
   if (oat_checksum != image_oat_checksum) {
     LOG(ERROR) << "Failed to match oat file checksum " << std::hex << oat_checksum
                << " to expected oat checksum " << std::hex << image_oat_checksum
                << " in image";
     return NULL;
   }
   return oat_file;
 }

 bool ImageSpace::ValidateOatFile() const {
   CHECK(oat_file_.get() != NULL);
   std::vector<const OatFile::OatDexFile*> oat_dex_files = oat_file_->GetOatDexFiles();
   for (size_t i = 0; i < oat_dex_files.size(); i++) {
     const OatFile::OatDexFile* oat_dex_file = oat_dex_files[i];
     const std::string& dex_file_location = oat_dex_file->GetDexFileLocation();
     uint32_t dex_file_location_checksum;
     if (!DexFile::GetChecksum(dex_file_location.c_str(), dex_file_location_checksum)) {
       LOG(WARNING) << "ValidateOatFile could not find checksum for " << dex_file_location;
       return false;
     }
     if (dex_file_location_checksum != oat_dex_file->GetDexFileLocationChecksum()) {
       LOG(WARNING) << "ValidateOatFile found checksum mismatch between oat file "
                    << oat_file_->GetLocation() << " and dex file " << dex_file_location
                    << " (" << oat_dex_file->GetDexFileLocationChecksum() << " != "
                    << dex_file_location_checksum << ")";
       return false;
     }
   }
   return true;
 }

 OatFile& ImageSpace::ReleaseOatFile() {
   CHECK(oat_file_.get() != NULL);
   return *oat_file_.release();
 }

 void ImageSpace::RecordImageAllocations(accounting::SpaceBitmap* live_bitmap) const {
   uint64_t start_time = 0;
   if (VLOG_IS_ON(heap) || VLOG_IS_ON(startup)) {
     LOG(INFO) << "ImageSpace::RecordImageAllocations entering";
     start_time = NanoTime();
   }
   DCHECK(!Runtime::Current()->IsStarted());
   CHECK(live_bitmap != NULL);
   byte* current = Begin() + RoundUp(sizeof(ImageHeader), kObjectAlignment);
   byte* end = End();
   while (current < end) {
     DCHECK_ALIGNED(current, kObjectAlignment);
     const mirror::Object* obj = reinterpret_cast<const mirror::Object*>(current);
     live_bitmap->Set(obj);
     current += RoundUp(obj->SizeOf(), kObjectAlignment);
   }
   if (VLOG_IS_ON(heap) || VLOG_IS_ON(startup)) {
     LOG(INFO) << "ImageSpace::RecordImageAllocations exiting ("
         << PrettyDuration(NanoTime() - start_time) << ")";
   }
 }

 void ImageSpace::Dump(std::ostream& os) const {
   os << GetType()
       << "begin=" << reinterpret_cast<void*>(Begin())
       << ",end=" << reinterpret_cast<void*>(End())
       << ",size=" << PrettySize(Size())
       << ",name=\"" << GetName() << "\"]";
 }

 }  // namespace space
 }  // namespace gc
 }  // namespace art
	/*
	* 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.
	*/

	#include "image_space.h"

	#include <sys/types.h>
	#include <sys/wait.h>

	#include "base/stl_util.h"
	#include "base/unix_file/fd_file.h"
	#include "gc/accounting/space_bitmap-inl.h"
	#include "mirror/abstract_method.h"
	#include "mirror/class-inl.h"
	#include "mirror/object-inl.h"
	#include "oat_file.h"
	#include "os.h"
	#include "runtime.h"
	#include "space-inl.h"
	#include "utils.h"

	namespace art {
	namespace gc {
	namespace space {

	size_t ImageSpace::bitmap_index_ = 0;

	ImageSpace::ImageSpace(const std::string& name, MemMap* mem_map)
	: MemMapSpace(name, mem_map, mem_map->Size(), kGcRetentionPolicyNeverCollect) {
	const size_t bitmap_index = bitmap_index_++;
	live_bitmap_.reset(accounting::SpaceBitmap::Create(
	StringPrintf("imagespace %s live-bitmap %d", name.c_str(), static_cast<int>(bitmap_index)),
	Begin(), Capacity()));
	DCHECK(live_bitmap_.get() != NULL) << "could not create imagespace live bitmap #" << bitmap_index;
	}

	static bool GenerateImage(const std::string& image_file_name) {
	const std::string boot_class_path_string(Runtime::Current()->GetBootClassPathString());
	std::vector<std::string> boot_class_path;
	Split(boot_class_path_string, ':', boot_class_path);
	if (boot_class_path.empty()) {
	LOG(FATAL) << "Failed to generate image because no boot class path specified";
	}

	std::vector<char*> arg_vector;

	std::string dex2oat_string(GetAndroidRoot());
	dex2oat_string += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat");
	const char* dex2oat = dex2oat_string.c_str();
	arg_vector.push_back(strdup(dex2oat));

	std::string image_option_string("--image=");
	image_option_string += image_file_name;
	const char* image_option = image_option_string.c_str();
	arg_vector.push_back(strdup(image_option));

	arg_vector.push_back(strdup("--runtime-arg"));
	arg_vector.push_back(strdup("-Xms64m"));

	arg_vector.push_back(strdup("--runtime-arg"));
	arg_vector.push_back(strdup("-Xmx64m"));

	for (size_t i = 0; i < boot_class_path.size(); i++) {
	std::string dex_file_option_string("--dex-file=");
	dex_file_option_string += boot_class_path[i];
	const char* dex_file_option = dex_file_option_string.c_str();
	arg_vector.push_back(strdup(dex_file_option));
	}

	std::string oat_file_option_string("--oat-file=");
	oat_file_option_string += image_file_name;
	oat_file_option_string.erase(oat_file_option_string.size() - 3);
	oat_file_option_string += "oat";
	const char* oat_file_option = oat_file_option_string.c_str();
	arg_vector.push_back(strdup(oat_file_option));

	std::string base_option_string(StringPrintf("--base=0x%x", ART_BASE_ADDRESS));
	arg_vector.push_back(strdup(base_option_string.c_str()));

	if (kIsTargetBuild) {
	arg_vector.push_back(strdup("--image-classes-zip=/system/framework/framework.jar"));
	arg_vector.push_back(strdup("--image-classes=preloaded-classes"));
	} else {
	arg_vector.push_back(strdup("--host"));
	}

	std::string command_line(Join(arg_vector, ' '));
	LOG(INFO) << "GenerateImage: " << command_line;

	arg_vector.push_back(NULL);
	char** argv = &arg_vector[0];

	// fork and exec dex2oat
	pid_t pid = fork();
	if (pid == 0) {
	// no allocation allowed between fork and exec

	// change process groups, so we don't get reaped by ProcessManager
	setpgid(0, 0);

	execv(dex2oat, argv);

	PLOG(FATAL) << "execv(" << dex2oat << ") failed";
	return false;
	} else {
	STLDeleteElements(&arg_vector);

	// wait for dex2oat to finish
	int status;
	pid_t got_pid = TEMP_FAILURE_RETRY(waitpid(pid, &status, 0));
	if (got_pid != pid) {
	PLOG(ERROR) << "waitpid failed: wanted " << pid << ", got " << got_pid;
	return false;
	}
	if (!WIFEXITED(status) \|\| WEXITSTATUS(status) != 0) {
	LOG(ERROR) << dex2oat << " failed: " << command_line;
	return false;
	}
	}
	return true;
	}

	ImageSpace* ImageSpace::Create(const std::string& original_image_file_name) {
	if (OS::FileExists(original_image_file_name.c_str())) {
	// If the /system file exists, it should be up-to-date, don't try to generate
	return space::ImageSpace::Init(original_image_file_name, false);
	}
	// If the /system file didn't exist, we need to use one from the dalvik-cache.
	// If the cache file exists, try to open, but if it fails, regenerate.
	// If it does not exist, generate.
	std::string image_file_name(GetDalvikCacheFilenameOrDie(original_image_file_name));
	if (OS::FileExists(image_file_name.c_str())) {
	space::ImageSpace* image_space = space::ImageSpace::Init(image_file_name, true);
	if (image_space != NULL) {
	return image_space;
	}
	}
	CHECK(GenerateImage(image_file_name)) << "Failed to generate image: " << image_file_name;
	return space::ImageSpace::Init(image_file_name, true);
	}

	ImageSpace* ImageSpace::Init(const std::string& image_file_name, bool validate_oat_file) {
	CHECK(!image_file_name.empty());

	uint64_t start_time = 0;
	if (VLOG_IS_ON(heap) \|\| VLOG_IS_ON(startup)) {
	start_time = NanoTime();
	LOG(INFO) << "ImageSpace::Init entering image_file_name=" << image_file_name;
	}

	UniquePtr<File> file(OS::OpenFile(image_file_name.c_str(), false));
	if (file.get() == NULL) {
	LOG(ERROR) << "Failed to open " << image_file_name;
	return NULL;
	}
	ImageHeader image_header;
	bool success = file->ReadFully(&image_header, sizeof(image_header));
	if (!success \|\| !image_header.IsValid()) {
	LOG(ERROR) << "Invalid image header " << image_file_name;
	return NULL;
	}
	UniquePtr<MemMap> map(MemMap::MapFileAtAddress(image_header.GetImageBegin(),
	file->GetLength(),
	PROT_READ \| PROT_WRITE,
	MAP_PRIVATE \| MAP_FIXED,
	file->Fd(),
	0,
	false));
	if (map.get() == NULL) {
	LOG(ERROR) << "Failed to map " << image_file_name;
	return NULL;
	}
	CHECK_EQ(image_header.GetImageBegin(), map->Begin());
	DCHECK_EQ(0, memcmp(&image_header, map->Begin(), sizeof(ImageHeader)));

	Runtime* runtime = Runtime::Current();
	mirror::Object* resolution_method = image_header.GetImageRoot(ImageHeader::kResolutionMethod);
	runtime->SetResolutionMethod(down_cast<mirror::AbstractMethod*>(resolution_method));

	mirror::Object* callee_save_method = image_header.GetImageRoot(ImageHeader::kCalleeSaveMethod);
	runtime->SetCalleeSaveMethod(down_cast<mirror::AbstractMethod*>(callee_save_method), Runtime::kSaveAll);
	callee_save_method = image_header.GetImageRoot(ImageHeader::kRefsOnlySaveMethod);
	runtime->SetCalleeSaveMethod(down_cast<mirror::AbstractMethod*>(callee_save_method), Runtime::kRefsOnly);
	callee_save_method = image_header.GetImageRoot(ImageHeader::kRefsAndArgsSaveMethod);
	runtime->SetCalleeSaveMethod(down_cast<mirror::AbstractMethod*>(callee_save_method), Runtime::kRefsAndArgs);

	UniquePtr<ImageSpace> space(new ImageSpace(image_file_name, map.release()));

	space->oat_file_.reset(space->OpenOatFile());
	if (space->oat_file_.get() == NULL) {
	LOG(ERROR) << "Failed to open oat file for image: " << image_file_name;
	return NULL;
	}

	if (validate_oat_file && !space->ValidateOatFile()) {
	LOG(WARNING) << "Failed to validate oat file for image: " << image_file_name;
	return NULL;
	}

	if (VLOG_IS_ON(heap) \|\| VLOG_IS_ON(startup)) {
	LOG(INFO) << "ImageSpace::Init exiting (" << PrettyDuration(NanoTime() - start_time)
	<< ") " << *space.get();
	}
	return space.release();
	}

	OatFile* ImageSpace::OpenOatFile() const {
	const Runtime* runtime = Runtime::Current();
	const ImageHeader& image_header = GetImageHeader();
	// Grab location but don't use Object::AsString as we haven't yet initialized the roots to
	// check the down cast
	mirror::String* oat_location =
	down_cast<mirror::String*>(image_header.GetImageRoot(ImageHeader::kOatLocation));
	std::string oat_filename;
	oat_filename += runtime->GetHostPrefix();
	oat_filename += oat_location->ToModifiedUtf8();
	OatFile* oat_file = OatFile::Open(oat_filename, oat_filename, image_header.GetOatDataBegin(),
	!Runtime::Current()->IsCompiler());
	if (oat_file == NULL) {
	LOG(ERROR) << "Failed to open oat file " << oat_filename << " referenced from image.";
	return NULL;
	}
	uint32_t oat_checksum = oat_file->GetOatHeader().GetChecksum();
	uint32_t image_oat_checksum = image_header.GetOatChecksum();
	if (oat_checksum != image_oat_checksum) {
	LOG(ERROR) << "Failed to match oat file checksum " << std::hex << oat_checksum
	<< " to expected oat checksum " << std::hex << image_oat_checksum
	<< " in image";
	return NULL;
	}
	return oat_file;
	}

	bool ImageSpace::ValidateOatFile() const {
	CHECK(oat_file_.get() != NULL);
	std::vector<const OatFile::OatDexFile*> oat_dex_files = oat_file_->GetOatDexFiles();
	for (size_t i = 0; i < oat_dex_files.size(); i++) {
	const OatFile::OatDexFile* oat_dex_file = oat_dex_files[i];
	const std::string& dex_file_location = oat_dex_file->GetDexFileLocation();
	uint32_t dex_file_location_checksum;
	if (!DexFile::GetChecksum(dex_file_location.c_str(), dex_file_location_checksum)) {
	LOG(WARNING) << "ValidateOatFile could not find checksum for " << dex_file_location;
	return false;
	}
	if (dex_file_location_checksum != oat_dex_file->GetDexFileLocationChecksum()) {
	LOG(WARNING) << "ValidateOatFile found checksum mismatch between oat file "
	<< oat_file_->GetLocation() << " and dex file " << dex_file_location
	<< " (" << oat_dex_file->GetDexFileLocationChecksum() << " != "
	<< dex_file_location_checksum << ")";
	return false;
	}
	}
	return true;
	}

	OatFile& ImageSpace::ReleaseOatFile() {
	CHECK(oat_file_.get() != NULL);
	return *oat_file_.release();
	}

	void ImageSpace::RecordImageAllocations(accounting::SpaceBitmap* live_bitmap) const {
	uint64_t start_time = 0;
	if (VLOG_IS_ON(heap) \|\| VLOG_IS_ON(startup)) {
	LOG(INFO) << "ImageSpace::RecordImageAllocations entering";
	start_time = NanoTime();
	}
	DCHECK(!Runtime::Current()->IsStarted());
	CHECK(live_bitmap != NULL);
	byte* current = Begin() + RoundUp(sizeof(ImageHeader), kObjectAlignment);
	byte* end = End();
	while (current < end) {
	DCHECK_ALIGNED(current, kObjectAlignment);
	const mirror::Object* obj = reinterpret_cast<const mirror::Object*>(current);
	live_bitmap->Set(obj);
	current += RoundUp(obj->SizeOf(), kObjectAlignment);
	}
	if (VLOG_IS_ON(heap) \|\| VLOG_IS_ON(startup)) {
	LOG(INFO) << "ImageSpace::RecordImageAllocations exiting ("
	<< PrettyDuration(NanoTime() - start_time) << ")";
	}
	}

	void ImageSpace::Dump(std::ostream& os) const {
	os << GetType()
	<< "begin=" << reinterpret_cast<void*>(Begin())
	<< ",end=" << reinterpret_cast<void*>(End())
	<< ",size=" << PrettySize(Size())
	<< ",name=\"" << GetName() << "\"]";
	}

	} // namespace space
	} // namespace gc
	} // namespace art