image_space.cc revision 46774767fcf7780d1455e755729198648d08742e
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "image_space.h" 18 19#include <dirent.h> 20#include <sys/types.h> 21 22#include <random> 23 24#include "base/macros.h" 25#include "base/stl_util.h" 26#include "base/unix_file/fd_file.h" 27#include "base/scoped_flock.h" 28#include "gc/accounting/space_bitmap-inl.h" 29#include "mirror/art_method.h" 30#include "mirror/class-inl.h" 31#include "mirror/object-inl.h" 32#include "oat_file.h" 33#include "os.h" 34#include "space-inl.h" 35#include "utils.h" 36 37namespace art { 38namespace gc { 39namespace space { 40 41Atomic<uint32_t> ImageSpace::bitmap_index_(0); 42 43ImageSpace::ImageSpace(const std::string& image_filename, const char* image_location, 44 MemMap* mem_map, accounting::ContinuousSpaceBitmap* live_bitmap) 45 : MemMapSpace(image_filename, mem_map, mem_map->Begin(), mem_map->End(), mem_map->End(), 46 kGcRetentionPolicyNeverCollect), 47 image_location_(image_location) { 48 DCHECK(live_bitmap != nullptr); 49 live_bitmap_.reset(live_bitmap); 50} 51 52static int32_t ChooseRelocationOffsetDelta(int32_t min_delta, int32_t max_delta) { 53 CHECK_ALIGNED(min_delta, kPageSize); 54 CHECK_ALIGNED(max_delta, kPageSize); 55 CHECK_LT(min_delta, max_delta); 56 57 std::default_random_engine generator; 58 generator.seed(NanoTime() * getpid()); 59 std::uniform_int_distribution<int32_t> distribution(min_delta, max_delta); 60 int32_t r = distribution(generator); 61 if (r % 2 == 0) { 62 r = RoundUp(r, kPageSize); 63 } else { 64 r = RoundDown(r, kPageSize); 65 } 66 CHECK_LE(min_delta, r); 67 CHECK_GE(max_delta, r); 68 CHECK_ALIGNED(r, kPageSize); 69 return r; 70} 71 72// We are relocating or generating the core image. We should get rid of everything. It is all 73// out-of-date. We also don't really care if this fails since it is just a convienence. 74// Adapted from prune_dex_cache(const char* subdir) in frameworks/native/cmds/installd/commands.c 75// Note this should only be used during first boot. 76static void RealPruneDexCache(const std::string& cache_dir_path); 77static void PruneDexCache(InstructionSet isa) { 78 CHECK_NE(isa, kNone); 79 // Prune the base /data/dalvik-cache 80 RealPruneDexCache(GetDalvikCacheOrDie(".", false)); 81 // prune /data/dalvik-cache/<isa> 82 RealPruneDexCache(GetDalvikCacheOrDie(GetInstructionSetString(isa), false)); 83} 84static void RealPruneDexCache(const std::string& cache_dir_path) { 85 if (!OS::DirectoryExists(cache_dir_path.c_str())) { 86 return; 87 } 88 DIR* cache_dir = opendir(cache_dir_path.c_str()); 89 if (cache_dir == nullptr) { 90 PLOG(WARNING) << "Unable to open " << cache_dir_path << " to delete it's contents"; 91 return; 92 } 93 94 for (struct dirent* de = readdir(cache_dir); de != nullptr; de = readdir(cache_dir)) { 95 const char* name = de->d_name; 96 if (strcmp(name, ".") == 0 || strcmp(name, "..") == 0) { 97 continue; 98 } 99 // We only want to delete regular files. 100 if (de->d_type != DT_REG) { 101 if (de->d_type != DT_DIR) { 102 // We do expect some directories (namely the <isa> for pruning the base dalvik-cache). 103 LOG(WARNING) << "Unexpected file type of " << std::hex << de->d_type << " encountered."; 104 } 105 continue; 106 } 107 std::string cache_file(cache_dir_path); 108 cache_file += '/'; 109 cache_file += name; 110 if (TEMP_FAILURE_RETRY(unlink(cache_file.c_str())) != 0) { 111 PLOG(ERROR) << "Unable to unlink " << cache_file; 112 continue; 113 } 114 } 115 CHECK_EQ(0, TEMP_FAILURE_RETRY(closedir(cache_dir))) << "Unable to close directory."; 116} 117 118static bool GenerateImage(const std::string& image_filename, InstructionSet image_isa, 119 std::string* error_msg) { 120 const std::string boot_class_path_string(Runtime::Current()->GetBootClassPathString()); 121 std::vector<std::string> boot_class_path; 122 Split(boot_class_path_string, ':', &boot_class_path); 123 if (boot_class_path.empty()) { 124 *error_msg = "Failed to generate image because no boot class path specified"; 125 return false; 126 } 127 // We should clean up so we are more likely to have room for the image. 128 if (Runtime::Current()->IsZygote()) { 129 LOG(INFO) << "Pruning dalvik-cache since we are generating an image and will need to recompile"; 130 PruneDexCache(image_isa); 131 } 132 133 std::vector<std::string> arg_vector; 134 135 std::string dex2oat(Runtime::Current()->GetCompilerExecutable()); 136 arg_vector.push_back(dex2oat); 137 138 std::string image_option_string("--image="); 139 image_option_string += image_filename; 140 arg_vector.push_back(image_option_string); 141 142 for (size_t i = 0; i < boot_class_path.size(); i++) { 143 arg_vector.push_back(std::string("--dex-file=") + boot_class_path[i]); 144 } 145 146 std::string oat_file_option_string("--oat-file="); 147 oat_file_option_string += image_filename; 148 oat_file_option_string.erase(oat_file_option_string.size() - 3); 149 oat_file_option_string += "oat"; 150 arg_vector.push_back(oat_file_option_string); 151 152 Runtime::Current()->AddCurrentRuntimeFeaturesAsDex2OatArguments(&arg_vector); 153 CHECK_EQ(image_isa, kRuntimeISA) 154 << "We should always be generating an image for the current isa."; 155 156 int32_t base_offset = ChooseRelocationOffsetDelta(ART_BASE_ADDRESS_MIN_DELTA, 157 ART_BASE_ADDRESS_MAX_DELTA); 158 LOG(INFO) << "Using an offset of 0x" << std::hex << base_offset << " from default " 159 << "art base address of 0x" << std::hex << ART_BASE_ADDRESS; 160 arg_vector.push_back(StringPrintf("--base=0x%x", ART_BASE_ADDRESS + base_offset)); 161 162 if (!kIsTargetBuild) { 163 arg_vector.push_back("--host"); 164 } 165 166 const std::vector<std::string>& compiler_options = Runtime::Current()->GetImageCompilerOptions(); 167 for (size_t i = 0; i < compiler_options.size(); ++i) { 168 arg_vector.push_back(compiler_options[i].c_str()); 169 } 170 171 std::string command_line(Join(arg_vector, ' ')); 172 LOG(INFO) << "GenerateImage: " << command_line; 173 return Exec(arg_vector, error_msg); 174} 175 176bool ImageSpace::FindImageFilename(const char* image_location, 177 const InstructionSet image_isa, 178 std::string* system_filename, 179 bool* has_system, 180 std::string* cache_filename, 181 bool* dalvik_cache_exists, 182 bool* has_cache, 183 bool* is_global_cache) { 184 *has_system = false; 185 *has_cache = false; 186 // image_location = /system/framework/boot.art 187 // system_image_location = /system/framework/<image_isa>/boot.art 188 std::string system_image_filename(GetSystemImageFilename(image_location, image_isa)); 189 if (OS::FileExists(system_image_filename.c_str())) { 190 *system_filename = system_image_filename; 191 *has_system = true; 192 } 193 194 bool have_android_data = false; 195 *dalvik_cache_exists = false; 196 std::string dalvik_cache; 197 GetDalvikCache(GetInstructionSetString(image_isa), true, &dalvik_cache, 198 &have_android_data, dalvik_cache_exists, is_global_cache); 199 200 if (have_android_data && *dalvik_cache_exists) { 201 // Always set output location even if it does not exist, 202 // so that the caller knows where to create the image. 203 // 204 // image_location = /system/framework/boot.art 205 // *image_filename = /data/dalvik-cache/<image_isa>/boot.art 206 std::string error_msg; 207 if (!GetDalvikCacheFilename(image_location, dalvik_cache.c_str(), cache_filename, &error_msg)) { 208 LOG(WARNING) << error_msg; 209 return *has_system; 210 } 211 *has_cache = OS::FileExists(cache_filename->c_str()); 212 } 213 return *has_system || *has_cache; 214} 215 216static bool ReadSpecificImageHeader(const char* filename, ImageHeader* image_header) { 217 std::unique_ptr<File> image_file(OS::OpenFileForReading(filename)); 218 if (image_file.get() == nullptr) { 219 return false; 220 } 221 const bool success = image_file->ReadFully(image_header, sizeof(ImageHeader)); 222 if (!success || !image_header->IsValid()) { 223 return false; 224 } 225 return true; 226} 227 228// Relocate the image at image_location to dest_filename and relocate it by a random amount. 229static bool RelocateImage(const char* image_location, const char* dest_filename, 230 InstructionSet isa, std::string* error_msg) { 231 // We should clean up so we are more likely to have room for the image. 232 if (Runtime::Current()->IsZygote()) { 233 LOG(INFO) << "Pruning dalvik-cache since we are relocating an image and will need to recompile"; 234 PruneDexCache(isa); 235 } 236 237 std::string patchoat(Runtime::Current()->GetPatchoatExecutable()); 238 239 std::string input_image_location_arg("--input-image-location="); 240 input_image_location_arg += image_location; 241 242 std::string output_image_filename_arg("--output-image-file="); 243 output_image_filename_arg += dest_filename; 244 245 std::string input_oat_location_arg("--input-oat-location="); 246 input_oat_location_arg += ImageHeader::GetOatLocationFromImageLocation(image_location); 247 248 std::string output_oat_filename_arg("--output-oat-file="); 249 output_oat_filename_arg += ImageHeader::GetOatLocationFromImageLocation(dest_filename); 250 251 std::string instruction_set_arg("--instruction-set="); 252 instruction_set_arg += GetInstructionSetString(isa); 253 254 std::string base_offset_arg("--base-offset-delta="); 255 StringAppendF(&base_offset_arg, "%d", ChooseRelocationOffsetDelta(ART_BASE_ADDRESS_MIN_DELTA, 256 ART_BASE_ADDRESS_MAX_DELTA)); 257 258 std::vector<std::string> argv; 259 argv.push_back(patchoat); 260 261 argv.push_back(input_image_location_arg); 262 argv.push_back(output_image_filename_arg); 263 264 argv.push_back(input_oat_location_arg); 265 argv.push_back(output_oat_filename_arg); 266 267 argv.push_back(instruction_set_arg); 268 argv.push_back(base_offset_arg); 269 270 std::string command_line(Join(argv, ' ')); 271 LOG(INFO) << "RelocateImage: " << command_line; 272 return Exec(argv, error_msg); 273} 274 275static ImageHeader* ReadSpecificImageHeader(const char* filename, std::string* error_msg) { 276 std::unique_ptr<ImageHeader> hdr(new ImageHeader); 277 if (!ReadSpecificImageHeader(filename, hdr.get())) { 278 *error_msg = StringPrintf("Unable to read image header for %s", filename); 279 return nullptr; 280 } 281 return hdr.release(); 282} 283 284ImageHeader* ImageSpace::ReadImageHeaderOrDie(const char* image_location, 285 const InstructionSet image_isa) { 286 std::string error_msg; 287 ImageHeader* image_header = ReadImageHeader(image_location, image_isa, &error_msg); 288 if (image_header == nullptr) { 289 LOG(FATAL) << error_msg; 290 } 291 return image_header; 292} 293 294ImageHeader* ImageSpace::ReadImageHeader(const char* image_location, 295 const InstructionSet image_isa, 296 std::string* error_msg) { 297 std::string system_filename; 298 bool has_system = false; 299 std::string cache_filename; 300 bool has_cache = false; 301 bool dalvik_cache_exists = false; 302 bool is_global_cache = false; 303 if (FindImageFilename(image_location, image_isa, &system_filename, &has_system, 304 &cache_filename, &dalvik_cache_exists, &has_cache, &is_global_cache)) { 305 if (Runtime::Current()->ShouldRelocate()) { 306 if (has_system && has_cache) { 307 std::unique_ptr<ImageHeader> sys_hdr(new ImageHeader); 308 std::unique_ptr<ImageHeader> cache_hdr(new ImageHeader); 309 if (!ReadSpecificImageHeader(system_filename.c_str(), sys_hdr.get())) { 310 *error_msg = StringPrintf("Unable to read image header for %s at %s", 311 image_location, system_filename.c_str()); 312 return nullptr; 313 } 314 if (!ReadSpecificImageHeader(cache_filename.c_str(), cache_hdr.get())) { 315 *error_msg = StringPrintf("Unable to read image header for %s at %s", 316 image_location, cache_filename.c_str()); 317 return nullptr; 318 } 319 if (sys_hdr->GetOatChecksum() != cache_hdr->GetOatChecksum()) { 320 *error_msg = StringPrintf("Unable to find a relocated version of image file %s", 321 image_location); 322 return nullptr; 323 } 324 return cache_hdr.release(); 325 } else if (!has_cache) { 326 *error_msg = StringPrintf("Unable to find a relocated version of image file %s", 327 image_location); 328 return nullptr; 329 } else if (!has_system && has_cache) { 330 // This can probably just use the cache one. 331 return ReadSpecificImageHeader(cache_filename.c_str(), error_msg); 332 } 333 } else { 334 // We don't want to relocate, Just pick the appropriate one if we have it and return. 335 if (has_system && has_cache) { 336 // We want the cache if the checksum matches, otherwise the system. 337 std::unique_ptr<ImageHeader> system(ReadSpecificImageHeader(system_filename.c_str(), 338 error_msg)); 339 std::unique_ptr<ImageHeader> cache(ReadSpecificImageHeader(cache_filename.c_str(), 340 error_msg)); 341 if (system.get() == nullptr || 342 (cache.get() != nullptr && cache->GetOatChecksum() == system->GetOatChecksum())) { 343 return cache.release(); 344 } else { 345 return system.release(); 346 } 347 } else if (has_system) { 348 return ReadSpecificImageHeader(system_filename.c_str(), error_msg); 349 } else if (has_cache) { 350 return ReadSpecificImageHeader(cache_filename.c_str(), error_msg); 351 } 352 } 353 } 354 355 *error_msg = StringPrintf("Unable to find image file for %s", image_location); 356 return nullptr; 357} 358 359static bool ChecksumsMatch(const char* image_a, const char* image_b) { 360 ImageHeader hdr_a; 361 ImageHeader hdr_b; 362 return ReadSpecificImageHeader(image_a, &hdr_a) && ReadSpecificImageHeader(image_b, &hdr_b) 363 && hdr_a.GetOatChecksum() == hdr_b.GetOatChecksum(); 364} 365 366static bool ImageCreationAllowed(bool is_global_cache, std::string* error_msg) { 367 // Anyone can write into a "local" cache. 368 if (!is_global_cache) { 369 return true; 370 } 371 372 // Only the zygote is allowed to create the global boot image. 373 if (Runtime::Current()->IsZygote()) { 374 return true; 375 } 376 377 *error_msg = "Only the zygote can create the global boot image."; 378 return false; 379} 380 381ImageSpace* ImageSpace::Create(const char* image_location, 382 const InstructionSet image_isa, 383 std::string* error_msg) { 384 std::string system_filename; 385 bool has_system = false; 386 std::string cache_filename; 387 bool has_cache = false; 388 bool dalvik_cache_exists = false; 389 bool is_global_cache = true; 390 const bool found_image = FindImageFilename(image_location, image_isa, &system_filename, 391 &has_system, &cache_filename, &dalvik_cache_exists, 392 &has_cache, &is_global_cache); 393 394 ImageSpace* space; 395 bool relocate = Runtime::Current()->ShouldRelocate(); 396 bool can_compile = Runtime::Current()->IsImageDex2OatEnabled(); 397 if (found_image) { 398 const std::string* image_filename; 399 bool is_system = false; 400 bool relocated_version_used = false; 401 if (relocate) { 402 if (!dalvik_cache_exists) { 403 *error_msg = StringPrintf("Requiring relocation for image '%s' at '%s' but we do not have " 404 "any dalvik_cache to find/place it in.", 405 image_location, system_filename.c_str()); 406 return nullptr; 407 } 408 if (has_system) { 409 if (has_cache && ChecksumsMatch(system_filename.c_str(), cache_filename.c_str())) { 410 // We already have a relocated version 411 image_filename = &cache_filename; 412 relocated_version_used = true; 413 } else { 414 // We cannot have a relocated version, Relocate the system one and use it. 415 416 std::string reason; 417 bool success; 418 419 // Check whether we are allowed to relocate. 420 if (!can_compile) { 421 reason = "Image dex2oat disabled by -Xnoimage-dex2oat."; 422 success = false; 423 } else if (!ImageCreationAllowed(is_global_cache, &reason)) { 424 // Whether we can write to the cache. 425 success = false; 426 } else { 427 // Try to relocate. 428 success = RelocateImage(image_location, cache_filename.c_str(), image_isa, &reason); 429 } 430 431 if (success) { 432 relocated_version_used = true; 433 image_filename = &cache_filename; 434 } else { 435 *error_msg = StringPrintf("Unable to relocate image '%s' from '%s' to '%s': %s", 436 image_location, system_filename.c_str(), 437 cache_filename.c_str(), reason.c_str()); 438 return nullptr; 439 } 440 } 441 } else { 442 CHECK(has_cache); 443 // We can just use cache's since it should be fine. This might or might not be relocated. 444 image_filename = &cache_filename; 445 } 446 } else { 447 if (has_system && has_cache) { 448 // Check they have the same cksum. If they do use the cache. Otherwise system. 449 if (ChecksumsMatch(system_filename.c_str(), cache_filename.c_str())) { 450 image_filename = &cache_filename; 451 relocated_version_used = true; 452 } else { 453 image_filename = &system_filename; 454 is_system = true; 455 } 456 } else if (has_system) { 457 image_filename = &system_filename; 458 is_system = true; 459 } else { 460 CHECK(has_cache); 461 image_filename = &cache_filename; 462 } 463 } 464 { 465 // Note that we must not use the file descriptor associated with 466 // ScopedFlock::GetFile to Init the image file. We want the file 467 // descriptor (and the associated exclusive lock) to be released when 468 // we leave Create. 469 ScopedFlock image_lock; 470 image_lock.Init(image_filename->c_str(), error_msg); 471 VLOG(startup) << "Using image file " << image_filename->c_str() << " for image location " 472 << image_location; 473 // If we are in /system we can assume the image is good. We can also 474 // assume this if we are using a relocated image (i.e. image checksum 475 // matches) since this is only different by the offset. We need this to 476 // make sure that host tests continue to work. 477 space = ImageSpace::Init(image_filename->c_str(), image_location, 478 !(is_system || relocated_version_used), error_msg); 479 } 480 if (space != nullptr) { 481 return space; 482 } 483 484 // If the /system file exists, it should be up-to-date, don't try to generate it. Same if it is 485 // a relocated copy from something in /system (i.e. checksum's match). 486 // Otherwise, log a warning and fall through to GenerateImage. 487 if (relocated_version_used) { 488 LOG(FATAL) << "Attempted to use relocated version of " << image_location << " " 489 << "at " << cache_filename << " generated from " << system_filename << " " 490 << "but image failed to load: " << *error_msg; 491 return nullptr; 492 } else if (is_system) { 493 *error_msg = StringPrintf("Failed to load /system image '%s': %s", 494 image_filename->c_str(), error_msg->c_str()); 495 return nullptr; 496 } else { 497 LOG(WARNING) << *error_msg; 498 } 499 } 500 501 if (!can_compile) { 502 *error_msg = "Not attempting to compile image because -Xnoimage-dex2oat"; 503 return nullptr; 504 } else if (!dalvik_cache_exists) { 505 *error_msg = StringPrintf("No place to put generated image."); 506 return nullptr; 507 } else if (!ImageCreationAllowed(is_global_cache, error_msg)) { 508 return nullptr; 509 } else if (!GenerateImage(cache_filename, image_isa, error_msg)) { 510 *error_msg = StringPrintf("Failed to generate image '%s': %s", 511 cache_filename.c_str(), error_msg->c_str()); 512 return nullptr; 513 } else { 514 // Note that we must not use the file descriptor associated with 515 // ScopedFlock::GetFile to Init the image file. We want the file 516 // descriptor (and the associated exclusive lock) to be released when 517 // we leave Create. 518 ScopedFlock image_lock; 519 image_lock.Init(cache_filename.c_str(), error_msg); 520 space = ImageSpace::Init(cache_filename.c_str(), image_location, true, error_msg); 521 if (space == nullptr) { 522 *error_msg = StringPrintf("Failed to load generated image '%s': %s", 523 cache_filename.c_str(), error_msg->c_str()); 524 } 525 return space; 526 } 527} 528 529void ImageSpace::VerifyImageAllocations() { 530 uint8_t* current = Begin() + RoundUp(sizeof(ImageHeader), kObjectAlignment); 531 while (current < End()) { 532 DCHECK_ALIGNED(current, kObjectAlignment); 533 mirror::Object* obj = reinterpret_cast<mirror::Object*>(current); 534 CHECK(live_bitmap_->Test(obj)); 535 CHECK(obj->GetClass() != nullptr) << "Image object at address " << obj << " has null class"; 536 if (kUseBakerOrBrooksReadBarrier) { 537 obj->AssertReadBarrierPointer(); 538 } 539 current += RoundUp(obj->SizeOf(), kObjectAlignment); 540 } 541} 542 543ImageSpace* ImageSpace::Init(const char* image_filename, const char* image_location, 544 bool validate_oat_file, std::string* error_msg) { 545 CHECK(image_filename != nullptr); 546 CHECK(image_location != nullptr); 547 548 uint64_t start_time = 0; 549 if (VLOG_IS_ON(heap) || VLOG_IS_ON(startup)) { 550 start_time = NanoTime(); 551 LOG(INFO) << "ImageSpace::Init entering image_filename=" << image_filename; 552 } 553 554 std::unique_ptr<File> file(OS::OpenFileForReading(image_filename)); 555 if (file.get() == NULL) { 556 *error_msg = StringPrintf("Failed to open '%s'", image_filename); 557 return nullptr; 558 } 559 ImageHeader image_header; 560 bool success = file->ReadFully(&image_header, sizeof(image_header)); 561 if (!success || !image_header.IsValid()) { 562 *error_msg = StringPrintf("Invalid image header in '%s'", image_filename); 563 return nullptr; 564 } 565 566 // Note: The image header is part of the image due to mmap page alignment required of offset. 567 std::unique_ptr<MemMap> map(MemMap::MapFileAtAddress(image_header.GetImageBegin(), 568 image_header.GetImageSize(), 569 PROT_READ | PROT_WRITE, 570 MAP_PRIVATE, 571 file->Fd(), 572 0, 573 false, 574 image_filename, 575 error_msg)); 576 if (map.get() == NULL) { 577 DCHECK(!error_msg->empty()); 578 return nullptr; 579 } 580 CHECK_EQ(image_header.GetImageBegin(), map->Begin()); 581 DCHECK_EQ(0, memcmp(&image_header, map->Begin(), sizeof(ImageHeader))); 582 583 std::unique_ptr<MemMap> image_map( 584 MemMap::MapFileAtAddress(nullptr, image_header.GetImageBitmapSize(), 585 PROT_READ, MAP_PRIVATE, 586 file->Fd(), image_header.GetBitmapOffset(), 587 false, 588 image_filename, 589 error_msg)); 590 if (image_map.get() == nullptr) { 591 *error_msg = StringPrintf("Failed to map image bitmap: %s", error_msg->c_str()); 592 return nullptr; 593 } 594 uint32_t bitmap_index = bitmap_index_.FetchAndAddSequentiallyConsistent(1); 595 std::string bitmap_name(StringPrintf("imagespace %s live-bitmap %u", image_filename, 596 bitmap_index)); 597 std::unique_ptr<accounting::ContinuousSpaceBitmap> bitmap( 598 accounting::ContinuousSpaceBitmap::CreateFromMemMap(bitmap_name, image_map.release(), 599 reinterpret_cast<uint8_t*>(map->Begin()), 600 map->Size())); 601 if (bitmap.get() == nullptr) { 602 *error_msg = StringPrintf("Could not create bitmap '%s'", bitmap_name.c_str()); 603 return nullptr; 604 } 605 606 std::unique_ptr<ImageSpace> space(new ImageSpace(image_filename, image_location, 607 map.release(), bitmap.release())); 608 609 // VerifyImageAllocations() will be called later in Runtime::Init() 610 // as some class roots like ArtMethod::java_lang_reflect_ArtMethod_ 611 // and ArtField::java_lang_reflect_ArtField_, which are used from 612 // Object::SizeOf() which VerifyImageAllocations() calls, are not 613 // set yet at this point. 614 615 space->oat_file_.reset(space->OpenOatFile(image_filename, error_msg)); 616 if (space->oat_file_.get() == nullptr) { 617 DCHECK(!error_msg->empty()); 618 return nullptr; 619 } 620 621 if (validate_oat_file && !space->ValidateOatFile(error_msg)) { 622 DCHECK(!error_msg->empty()); 623 return nullptr; 624 } 625 626 Runtime* runtime = Runtime::Current(); 627 runtime->SetInstructionSet(space->oat_file_->GetOatHeader().GetInstructionSet()); 628 629 mirror::Object* resolution_method = image_header.GetImageRoot(ImageHeader::kResolutionMethod); 630 runtime->SetResolutionMethod(down_cast<mirror::ArtMethod*>(resolution_method)); 631 mirror::Object* imt_conflict_method = image_header.GetImageRoot(ImageHeader::kImtConflictMethod); 632 runtime->SetImtConflictMethod(down_cast<mirror::ArtMethod*>(imt_conflict_method)); 633 mirror::Object* imt_unimplemented_method = 634 image_header.GetImageRoot(ImageHeader::kImtUnimplementedMethod); 635 runtime->SetImtUnimplementedMethod(down_cast<mirror::ArtMethod*>(imt_unimplemented_method)); 636 mirror::Object* default_imt = image_header.GetImageRoot(ImageHeader::kDefaultImt); 637 runtime->SetDefaultImt(down_cast<mirror::ObjectArray<mirror::ArtMethod>*>(default_imt)); 638 639 mirror::Object* callee_save_method = image_header.GetImageRoot(ImageHeader::kCalleeSaveMethod); 640 runtime->SetCalleeSaveMethod(down_cast<mirror::ArtMethod*>(callee_save_method), 641 Runtime::kSaveAll); 642 callee_save_method = image_header.GetImageRoot(ImageHeader::kRefsOnlySaveMethod); 643 runtime->SetCalleeSaveMethod(down_cast<mirror::ArtMethod*>(callee_save_method), 644 Runtime::kRefsOnly); 645 callee_save_method = image_header.GetImageRoot(ImageHeader::kRefsAndArgsSaveMethod); 646 runtime->SetCalleeSaveMethod(down_cast<mirror::ArtMethod*>(callee_save_method), 647 Runtime::kRefsAndArgs); 648 649 if (VLOG_IS_ON(heap) || VLOG_IS_ON(startup)) { 650 LOG(INFO) << "ImageSpace::Init exiting (" << PrettyDuration(NanoTime() - start_time) 651 << ") " << *space.get(); 652 } 653 return space.release(); 654} 655 656OatFile* ImageSpace::OpenOatFile(const char* image_path, std::string* error_msg) const { 657 const ImageHeader& image_header = GetImageHeader(); 658 std::string oat_filename = ImageHeader::GetOatLocationFromImageLocation(image_path); 659 660 CHECK(image_header.GetOatDataBegin() != nullptr); 661 662 OatFile* oat_file = OatFile::Open(oat_filename, oat_filename, image_header.GetOatDataBegin(), 663 image_header.GetOatFileBegin(), 664 !Runtime::Current()->IsCompiler(), error_msg); 665 if (oat_file == NULL) { 666 *error_msg = StringPrintf("Failed to open oat file '%s' referenced from image %s: %s", 667 oat_filename.c_str(), GetName(), error_msg->c_str()); 668 return nullptr; 669 } 670 uint32_t oat_checksum = oat_file->GetOatHeader().GetChecksum(); 671 uint32_t image_oat_checksum = image_header.GetOatChecksum(); 672 if (oat_checksum != image_oat_checksum) { 673 *error_msg = StringPrintf("Failed to match oat file checksum 0x%x to expected oat checksum 0x%x" 674 " in image %s", oat_checksum, image_oat_checksum, GetName()); 675 return nullptr; 676 } 677 int32_t image_patch_delta = image_header.GetPatchDelta(); 678 int32_t oat_patch_delta = oat_file->GetOatHeader().GetImagePatchDelta(); 679 if (oat_patch_delta != image_patch_delta && !image_header.CompilePic()) { 680 // We should have already relocated by this point. Bail out. 681 *error_msg = StringPrintf("Failed to match oat file patch delta %d to expected patch delta %d " 682 "in image %s", oat_patch_delta, image_patch_delta, GetName()); 683 return nullptr; 684 } 685 686 return oat_file; 687} 688 689bool ImageSpace::ValidateOatFile(std::string* error_msg) const { 690 CHECK(oat_file_.get() != NULL); 691 for (const OatFile::OatDexFile* oat_dex_file : oat_file_->GetOatDexFiles()) { 692 const std::string& dex_file_location = oat_dex_file->GetDexFileLocation(); 693 uint32_t dex_file_location_checksum; 694 if (!DexFile::GetChecksum(dex_file_location.c_str(), &dex_file_location_checksum, error_msg)) { 695 *error_msg = StringPrintf("Failed to get checksum of dex file '%s' referenced by image %s: " 696 "%s", dex_file_location.c_str(), GetName(), error_msg->c_str()); 697 return false; 698 } 699 if (dex_file_location_checksum != oat_dex_file->GetDexFileLocationChecksum()) { 700 *error_msg = StringPrintf("ValidateOatFile found checksum mismatch between oat file '%s' and " 701 "dex file '%s' (0x%x != 0x%x)", 702 oat_file_->GetLocation().c_str(), dex_file_location.c_str(), 703 oat_dex_file->GetDexFileLocationChecksum(), 704 dex_file_location_checksum); 705 return false; 706 } 707 } 708 return true; 709} 710 711const OatFile* ImageSpace::GetOatFile() const { 712 return oat_file_.get(); 713} 714 715OatFile* ImageSpace::ReleaseOatFile() { 716 CHECK(oat_file_.get() != NULL); 717 return oat_file_.release(); 718} 719 720void ImageSpace::Dump(std::ostream& os) const { 721 os << GetType() 722 << " begin=" << reinterpret_cast<void*>(Begin()) 723 << ",end=" << reinterpret_cast<void*>(End()) 724 << ",size=" << PrettySize(Size()) 725 << ",name=\"" << GetName() << "\"]"; 726} 727 728} // namespace space 729} // namespace gc 730} // namespace art 731