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 "oat_file.h" 18 19 #include <dlfcn.h> 20 #include <sstream> 21 #include <string.h> 22 #include <unistd.h> 23 24 #include "base/bit_vector.h" 25 #include "base/stl_util.h" 26 #include "base/unix_file/fd_file.h" 27 #include "elf_file.h" 28 #include "elf_utils.h" 29 #include "oat.h" 30 #include "mirror/art_method.h" 31 #include "mirror/art_method-inl.h" 32 #include "mirror/class.h" 33 #include "mirror/object-inl.h" 34 #include "os.h" 35 #include "runtime.h" 36 #include "utils.h" 37 #include "vmap_table.h" 38 39 namespace art { 40 41 void OatFile::CheckLocation(const std::string& location) { 42 CHECK(!location.empty()); 43 } 44 45 OatFile* OatFile::OpenWithElfFile(ElfFile* elf_file, 46 const std::string& location, 47 std::string* error_msg) { 48 std::unique_ptr<OatFile> oat_file(new OatFile(location, false)); 49 oat_file->elf_file_.reset(elf_file); 50 Elf32_Shdr* hdr = elf_file->FindSectionByName(".rodata"); 51 oat_file->begin_ = elf_file->Begin() + hdr->sh_offset; 52 oat_file->end_ = elf_file->Begin() + hdr->sh_size + hdr->sh_offset; 53 return oat_file->Setup(error_msg) ? oat_file.release() : nullptr; 54 } 55 56 OatFile* OatFile::OpenMemory(std::vector<uint8_t>& oat_contents, 57 const std::string& location, 58 std::string* error_msg) { 59 CHECK(!oat_contents.empty()) << location; 60 CheckLocation(location); 61 std::unique_ptr<OatFile> oat_file(new OatFile(location, false)); 62 oat_file->begin_ = &oat_contents[0]; 63 oat_file->end_ = &oat_contents[oat_contents.size()]; 64 return oat_file->Setup(error_msg) ? oat_file.release() : nullptr; 65 } 66 67 OatFile* OatFile::Open(const std::string& filename, 68 const std::string& location, 69 byte* requested_base, 70 bool executable, 71 std::string* error_msg) { 72 CHECK(!filename.empty()) << location; 73 CheckLocation(filename); 74 std::unique_ptr<OatFile> ret; 75 if (kUsePortableCompiler && executable) { 76 // If we are using PORTABLE, use dlopen to deal with relocations. 77 // 78 // We use our own ELF loader for Quick to deal with legacy apps that 79 // open a generated dex file by name, remove the file, then open 80 // another generated dex file with the same name. http://b/10614658 81 ret.reset(OpenDlopen(filename, location, requested_base, error_msg)); 82 } else { 83 // If we aren't trying to execute, we just use our own ElfFile loader for a couple reasons: 84 // 85 // On target, dlopen may fail when compiling due to selinux restrictions on installd. 86 // 87 // On host, dlopen is expected to fail when cross compiling, so fall back to OpenElfFile. 88 // This won't work for portable runtime execution because it doesn't process relocations. 89 std::unique_ptr<File> file(OS::OpenFileForReading(filename.c_str())); 90 if (file.get() == NULL) { 91 *error_msg = StringPrintf("Failed to open oat filename for reading: %s", strerror(errno)); 92 return nullptr; 93 } 94 ret.reset(OpenElfFile(file.get(), location, requested_base, false, executable, error_msg)); 95 96 // It would be nice to unlink here. But we might have opened the file created by the 97 // ScopedLock, which we better not delete to avoid races. TODO: Investigate how to fix the API 98 // to allow removal when we know the ELF must be borked. 99 } 100 return ret.release(); 101 } 102 103 OatFile* OatFile::OpenWritable(File* file, const std::string& location, std::string* error_msg) { 104 CheckLocation(location); 105 return OpenElfFile(file, location, NULL, true, false, error_msg); 106 } 107 108 OatFile* OatFile::OpenReadable(File* file, const std::string& location, std::string* error_msg) { 109 CheckLocation(location); 110 return OpenElfFile(file, location, NULL, false, false, error_msg); 111 } 112 113 OatFile* OatFile::OpenDlopen(const std::string& elf_filename, 114 const std::string& location, 115 byte* requested_base, 116 std::string* error_msg) { 117 std::unique_ptr<OatFile> oat_file(new OatFile(location, true)); 118 bool success = oat_file->Dlopen(elf_filename, requested_base, error_msg); 119 if (!success) { 120 return nullptr; 121 } 122 return oat_file.release(); 123 } 124 125 OatFile* OatFile::OpenElfFile(File* file, 126 const std::string& location, 127 byte* requested_base, 128 bool writable, 129 bool executable, 130 std::string* error_msg) { 131 std::unique_ptr<OatFile> oat_file(new OatFile(location, executable)); 132 bool success = oat_file->ElfFileOpen(file, requested_base, writable, executable, error_msg); 133 if (!success) { 134 CHECK(!error_msg->empty()); 135 return nullptr; 136 } 137 return oat_file.release(); 138 } 139 140 OatFile::OatFile(const std::string& location, bool is_executable) 141 : location_(location), begin_(NULL), end_(NULL), is_executable_(is_executable), 142 dlopen_handle_(NULL), 143 secondary_lookup_lock_("OatFile secondary lookup lock", kOatFileSecondaryLookupLock) { 144 CHECK(!location_.empty()); 145 } 146 147 OatFile::~OatFile() { 148 STLDeleteElements(&oat_dex_files_storage_); 149 if (dlopen_handle_ != NULL) { 150 dlclose(dlopen_handle_); 151 } 152 } 153 154 bool OatFile::Dlopen(const std::string& elf_filename, byte* requested_base, 155 std::string* error_msg) { 156 char* absolute_path = realpath(elf_filename.c_str(), NULL); 157 if (absolute_path == NULL) { 158 *error_msg = StringPrintf("Failed to find absolute path for '%s'", elf_filename.c_str()); 159 return false; 160 } 161 dlopen_handle_ = dlopen(absolute_path, RTLD_NOW); 162 free(absolute_path); 163 if (dlopen_handle_ == NULL) { 164 *error_msg = StringPrintf("Failed to dlopen '%s': %s", elf_filename.c_str(), dlerror()); 165 return false; 166 } 167 begin_ = reinterpret_cast<byte*>(dlsym(dlopen_handle_, "oatdata")); 168 if (begin_ == NULL) { 169 *error_msg = StringPrintf("Failed to find oatdata symbol in '%s': %s", elf_filename.c_str(), 170 dlerror()); 171 return false; 172 } 173 if (requested_base != NULL && begin_ != requested_base) { 174 *error_msg = StringPrintf("Failed to find oatdata symbol at expected address: " 175 "oatdata=%p != expected=%p /proc/self/maps:\n", 176 begin_, requested_base); 177 ReadFileToString("/proc/self/maps", error_msg); 178 return false; 179 } 180 end_ = reinterpret_cast<byte*>(dlsym(dlopen_handle_, "oatlastword")); 181 if (end_ == NULL) { 182 *error_msg = StringPrintf("Failed to find oatlastword symbol in '%s': %s", elf_filename.c_str(), 183 dlerror()); 184 return false; 185 } 186 // Readjust to be non-inclusive upper bound. 187 end_ += sizeof(uint32_t); 188 return Setup(error_msg); 189 } 190 191 bool OatFile::ElfFileOpen(File* file, byte* requested_base, bool writable, bool executable, 192 std::string* error_msg) { 193 elf_file_.reset(ElfFile::Open(file, writable, true, error_msg)); 194 if (elf_file_.get() == nullptr) { 195 DCHECK(!error_msg->empty()); 196 return false; 197 } 198 bool loaded = elf_file_->Load(executable, error_msg); 199 if (!loaded) { 200 DCHECK(!error_msg->empty()); 201 return false; 202 } 203 begin_ = elf_file_->FindDynamicSymbolAddress("oatdata"); 204 if (begin_ == NULL) { 205 *error_msg = StringPrintf("Failed to find oatdata symbol in '%s'", file->GetPath().c_str()); 206 return false; 207 } 208 if (requested_base != NULL && begin_ != requested_base) { 209 *error_msg = StringPrintf("Failed to find oatdata symbol at expected address: " 210 "oatdata=%p != expected=%p /proc/self/maps:\n", 211 begin_, requested_base); 212 ReadFileToString("/proc/self/maps", error_msg); 213 return false; 214 } 215 end_ = elf_file_->FindDynamicSymbolAddress("oatlastword"); 216 if (end_ == NULL) { 217 *error_msg = StringPrintf("Failed to find oatlastword symbol in '%s'", file->GetPath().c_str()); 218 return false; 219 } 220 // Readjust to be non-inclusive upper bound. 221 end_ += sizeof(uint32_t); 222 return Setup(error_msg); 223 } 224 225 bool OatFile::Setup(std::string* error_msg) { 226 if (!GetOatHeader().IsValid()) { 227 *error_msg = StringPrintf("Invalid oat magic for '%s'", GetLocation().c_str()); 228 return false; 229 } 230 const byte* oat = Begin(); 231 oat += sizeof(OatHeader); 232 if (oat > End()) { 233 *error_msg = StringPrintf("In oat file '%s' found truncated OatHeader", GetLocation().c_str()); 234 return false; 235 } 236 237 oat += GetOatHeader().GetKeyValueStoreSize(); 238 if (oat > End()) { 239 *error_msg = StringPrintf("In oat file '%s' found truncated variable-size data: " 240 "%p + %zd + %ud <= %p", GetLocation().c_str(), 241 Begin(), sizeof(OatHeader), GetOatHeader().GetKeyValueStoreSize(), 242 End()); 243 return false; 244 } 245 246 uint32_t dex_file_count = GetOatHeader().GetDexFileCount(); 247 oat_dex_files_storage_.reserve(dex_file_count); 248 for (size_t i = 0; i < dex_file_count; i++) { 249 uint32_t dex_file_location_size = *reinterpret_cast<const uint32_t*>(oat); 250 if (UNLIKELY(dex_file_location_size == 0U)) { 251 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd with empty location name", 252 GetLocation().c_str(), i); 253 return false; 254 } 255 oat += sizeof(dex_file_location_size); 256 if (UNLIKELY(oat > End())) { 257 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd truncated after dex file " 258 "location size", GetLocation().c_str(), i); 259 return false; 260 } 261 262 const char* dex_file_location_data = reinterpret_cast<const char*>(oat); 263 oat += dex_file_location_size; 264 if (UNLIKELY(oat > End())) { 265 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd with truncated dex file " 266 "location", GetLocation().c_str(), i); 267 return false; 268 } 269 270 std::string dex_file_location(dex_file_location_data, dex_file_location_size); 271 272 uint32_t dex_file_checksum = *reinterpret_cast<const uint32_t*>(oat); 273 oat += sizeof(dex_file_checksum); 274 if (UNLIKELY(oat > End())) { 275 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' truncated after " 276 "dex file checksum", GetLocation().c_str(), i, 277 dex_file_location.c_str()); 278 return false; 279 } 280 281 uint32_t dex_file_offset = *reinterpret_cast<const uint32_t*>(oat); 282 if (UNLIKELY(dex_file_offset == 0U)) { 283 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with zero dex " 284 "file offset", GetLocation().c_str(), i, dex_file_location.c_str()); 285 return false; 286 } 287 if (UNLIKELY(dex_file_offset > Size())) { 288 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with dex file " 289 "offset %ud > %zd", GetLocation().c_str(), i, 290 dex_file_location.c_str(), dex_file_offset, Size()); 291 return false; 292 } 293 oat += sizeof(dex_file_offset); 294 if (UNLIKELY(oat > End())) { 295 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' truncated " 296 " after dex file offsets", GetLocation().c_str(), i, 297 dex_file_location.c_str()); 298 return false; 299 } 300 301 const uint8_t* dex_file_pointer = Begin() + dex_file_offset; 302 if (UNLIKELY(!DexFile::IsMagicValid(dex_file_pointer))) { 303 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with invalid " 304 " dex file magic '%s'", GetLocation().c_str(), i, 305 dex_file_location.c_str(), dex_file_pointer); 306 return false; 307 } 308 if (UNLIKELY(!DexFile::IsVersionValid(dex_file_pointer))) { 309 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with invalid " 310 " dex file version '%s'", GetLocation().c_str(), i, 311 dex_file_location.c_str(), dex_file_pointer); 312 return false; 313 } 314 const DexFile::Header* header = reinterpret_cast<const DexFile::Header*>(dex_file_pointer); 315 const uint32_t* methods_offsets_pointer = reinterpret_cast<const uint32_t*>(oat); 316 317 oat += (sizeof(*methods_offsets_pointer) * header->class_defs_size_); 318 if (UNLIKELY(oat > End())) { 319 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with truncated " 320 " method offsets", GetLocation().c_str(), i, 321 dex_file_location.c_str()); 322 return false; 323 } 324 325 std::string canonical_location = DexFile::GetDexCanonicalLocation(dex_file_location.c_str()); 326 327 // Create the OatDexFile and add it to the owning container. 328 OatDexFile* oat_dex_file = new OatDexFile(this, 329 dex_file_location, 330 canonical_location, 331 dex_file_checksum, 332 dex_file_pointer, 333 methods_offsets_pointer); 334 oat_dex_files_storage_.push_back(oat_dex_file); 335 336 // Add the location and canonical location (if different) to the oat_dex_files_ table. 337 StringPiece key(oat_dex_file->GetDexFileLocation()); 338 oat_dex_files_.Put(key, oat_dex_file); 339 if (canonical_location != dex_file_location) { 340 StringPiece canonical_key(oat_dex_file->GetCanonicalDexFileLocation()); 341 oat_dex_files_.Put(canonical_key, oat_dex_file); 342 } 343 } 344 return true; 345 } 346 347 const OatHeader& OatFile::GetOatHeader() const { 348 return *reinterpret_cast<const OatHeader*>(Begin()); 349 } 350 351 const byte* OatFile::Begin() const { 352 CHECK(begin_ != NULL); 353 return begin_; 354 } 355 356 const byte* OatFile::End() const { 357 CHECK(end_ != NULL); 358 return end_; 359 } 360 361 const OatFile::OatDexFile* OatFile::GetOatDexFile(const char* dex_location, 362 const uint32_t* dex_location_checksum, 363 bool warn_if_not_found) const { 364 // NOTE: We assume here that the canonical location for a given dex_location never 365 // changes. If it does (i.e. some symlink used by the filename changes) we may return 366 // an incorrect OatDexFile. As long as we have a checksum to check, we shall return 367 // an identical file or fail; otherwise we may see some unpredictable failures. 368 369 // TODO: Additional analysis of usage patterns to see if this can be simplified 370 // without any performance loss, for example by not doing the first lock-free lookup. 371 372 const OatFile::OatDexFile* oat_dex_file = nullptr; 373 StringPiece key(dex_location); 374 // Try to find the key cheaply in the oat_dex_files_ map which holds dex locations 375 // directly mentioned in the oat file and doesn't require locking. 376 auto primary_it = oat_dex_files_.find(key); 377 if (primary_it != oat_dex_files_.end()) { 378 oat_dex_file = primary_it->second; 379 DCHECK(oat_dex_file != nullptr); 380 } else { 381 // This dex_location is not one of the dex locations directly mentioned in the 382 // oat file. The correct lookup is via the canonical location but first see in 383 // the secondary_oat_dex_files_ whether we've looked up this location before. 384 MutexLock mu(Thread::Current(), secondary_lookup_lock_); 385 auto secondary_lb = secondary_oat_dex_files_.lower_bound(key); 386 if (secondary_lb != secondary_oat_dex_files_.end() && key == secondary_lb->first) { 387 oat_dex_file = secondary_lb->second; // May be nullptr. 388 } else { 389 // We haven't seen this dex_location before, we must check the canonical location. 390 std::string dex_canonical_location = DexFile::GetDexCanonicalLocation(dex_location); 391 if (dex_canonical_location != dex_location) { 392 StringPiece canonical_key(dex_canonical_location); 393 auto canonical_it = oat_dex_files_.find(canonical_key); 394 if (canonical_it != oat_dex_files_.end()) { 395 oat_dex_file = canonical_it->second; 396 } // else keep nullptr. 397 } // else keep nullptr. 398 399 // Copy the key to the string_cache_ and store the result in secondary map. 400 string_cache_.emplace_back(key.data(), key.length()); 401 StringPiece key_copy(string_cache_.back()); 402 secondary_oat_dex_files_.PutBefore(secondary_lb, key_copy, oat_dex_file); 403 } 404 } 405 if (oat_dex_file != nullptr && 406 (dex_location_checksum == nullptr || 407 oat_dex_file->GetDexFileLocationChecksum() == *dex_location_checksum)) { 408 return oat_dex_file; 409 } 410 411 if (warn_if_not_found) { 412 std::string dex_canonical_location = DexFile::GetDexCanonicalLocation(dex_location); 413 std::string checksum("<unspecified>"); 414 if (dex_location_checksum != NULL) { 415 checksum = StringPrintf("0x%08x", *dex_location_checksum); 416 } 417 LOG(WARNING) << "Failed to find OatDexFile for DexFile " << dex_location 418 << " ( canonical path " << dex_canonical_location << ")" 419 << " with checksum " << checksum << " in OatFile " << GetLocation(); 420 if (kIsDebugBuild) { 421 for (const OatDexFile* odf : oat_dex_files_storage_) { 422 LOG(WARNING) << "OatFile " << GetLocation() 423 << " contains OatDexFile " << odf->GetDexFileLocation() 424 << " (canonical path " << odf->GetCanonicalDexFileLocation() << ")" 425 << " with checksum 0x" << std::hex << odf->GetDexFileLocationChecksum(); 426 } 427 } 428 } 429 430 return NULL; 431 } 432 433 OatFile::OatDexFile::OatDexFile(const OatFile* oat_file, 434 const std::string& dex_file_location, 435 const std::string& canonical_dex_file_location, 436 uint32_t dex_file_location_checksum, 437 const byte* dex_file_pointer, 438 const uint32_t* oat_class_offsets_pointer) 439 : oat_file_(oat_file), 440 dex_file_location_(dex_file_location), 441 canonical_dex_file_location_(canonical_dex_file_location), 442 dex_file_location_checksum_(dex_file_location_checksum), 443 dex_file_pointer_(dex_file_pointer), 444 oat_class_offsets_pointer_(oat_class_offsets_pointer) {} 445 446 OatFile::OatDexFile::~OatDexFile() {} 447 448 size_t OatFile::OatDexFile::FileSize() const { 449 return reinterpret_cast<const DexFile::Header*>(dex_file_pointer_)->file_size_; 450 } 451 452 const DexFile* OatFile::OatDexFile::OpenDexFile(std::string* error_msg) const { 453 return DexFile::Open(dex_file_pointer_, FileSize(), dex_file_location_, 454 dex_file_location_checksum_, error_msg); 455 } 456 457 uint32_t OatFile::OatDexFile::GetOatClassOffset(uint16_t class_def_index) const { 458 return oat_class_offsets_pointer_[class_def_index]; 459 } 460 461 OatFile::OatClass OatFile::OatDexFile::GetOatClass(uint16_t class_def_index) const { 462 uint32_t oat_class_offset = GetOatClassOffset(class_def_index); 463 464 const byte* oat_class_pointer = oat_file_->Begin() + oat_class_offset; 465 CHECK_LT(oat_class_pointer, oat_file_->End()) << oat_file_->GetLocation(); 466 467 const byte* status_pointer = oat_class_pointer; 468 CHECK_LT(status_pointer, oat_file_->End()) << oat_file_->GetLocation(); 469 mirror::Class::Status status = 470 static_cast<mirror::Class::Status>(*reinterpret_cast<const int16_t*>(status_pointer)); 471 CHECK_LT(status, mirror::Class::kStatusMax); 472 473 const byte* type_pointer = status_pointer + sizeof(uint16_t); 474 CHECK_LT(type_pointer, oat_file_->End()) << oat_file_->GetLocation(); 475 OatClassType type = static_cast<OatClassType>(*reinterpret_cast<const uint16_t*>(type_pointer)); 476 CHECK_LT(type, kOatClassMax); 477 478 const byte* after_type_pointer = type_pointer + sizeof(int16_t); 479 CHECK_LE(after_type_pointer, oat_file_->End()) << oat_file_->GetLocation(); 480 481 uint32_t bitmap_size = 0; 482 const byte* bitmap_pointer = nullptr; 483 const byte* methods_pointer = nullptr; 484 if (type == kOatClassSomeCompiled) { 485 bitmap_size = static_cast<uint32_t>(*reinterpret_cast<const uint32_t*>(after_type_pointer)); 486 bitmap_pointer = after_type_pointer + sizeof(bitmap_size); 487 CHECK_LE(bitmap_pointer, oat_file_->End()) << oat_file_->GetLocation(); 488 methods_pointer = bitmap_pointer + bitmap_size; 489 } else { 490 methods_pointer = after_type_pointer; 491 } 492 CHECK_LE(methods_pointer, oat_file_->End()) << oat_file_->GetLocation(); 493 494 return OatClass(oat_file_, 495 status, 496 type, 497 bitmap_size, 498 reinterpret_cast<const uint32_t*>(bitmap_pointer), 499 reinterpret_cast<const OatMethodOffsets*>(methods_pointer)); 500 } 501 502 OatFile::OatClass::OatClass(const OatFile* oat_file, 503 mirror::Class::Status status, 504 OatClassType type, 505 uint32_t bitmap_size, 506 const uint32_t* bitmap_pointer, 507 const OatMethodOffsets* methods_pointer) 508 : oat_file_(oat_file), status_(status), type_(type), 509 bitmap_(bitmap_pointer), methods_pointer_(methods_pointer) { 510 CHECK(methods_pointer != nullptr); 511 switch (type_) { 512 case kOatClassAllCompiled: { 513 CHECK_EQ(0U, bitmap_size); 514 CHECK(bitmap_pointer == nullptr); 515 break; 516 } 517 case kOatClassSomeCompiled: { 518 CHECK_NE(0U, bitmap_size); 519 CHECK(bitmap_pointer != nullptr); 520 break; 521 } 522 case kOatClassNoneCompiled: { 523 CHECK_EQ(0U, bitmap_size); 524 CHECK(bitmap_pointer == nullptr); 525 methods_pointer_ = nullptr; 526 break; 527 } 528 case kOatClassMax: { 529 LOG(FATAL) << "Invalid OatClassType " << type_; 530 break; 531 } 532 } 533 } 534 535 uint32_t OatFile::OatClass::GetOatMethodOffsetsOffset(uint32_t method_index) const { 536 const OatMethodOffsets* oat_method_offsets = GetOatMethodOffsets(method_index); 537 if (oat_method_offsets == nullptr) { 538 return 0u; 539 } 540 return reinterpret_cast<const uint8_t*>(oat_method_offsets) - oat_file_->Begin(); 541 } 542 543 const OatMethodOffsets* OatFile::OatClass::GetOatMethodOffsets(uint32_t method_index) const { 544 // NOTE: We don't keep the number of methods and cannot do a bounds check for method_index. 545 if (methods_pointer_ == nullptr) { 546 CHECK_EQ(kOatClassNoneCompiled, type_); 547 return nullptr; 548 } 549 size_t methods_pointer_index; 550 if (bitmap_ == nullptr) { 551 CHECK_EQ(kOatClassAllCompiled, type_); 552 methods_pointer_index = method_index; 553 } else { 554 CHECK_EQ(kOatClassSomeCompiled, type_); 555 if (!BitVector::IsBitSet(bitmap_, method_index)) { 556 return nullptr; 557 } 558 size_t num_set_bits = BitVector::NumSetBits(bitmap_, method_index); 559 methods_pointer_index = num_set_bits; 560 } 561 const OatMethodOffsets& oat_method_offsets = methods_pointer_[methods_pointer_index]; 562 return &oat_method_offsets; 563 } 564 565 const OatFile::OatMethod OatFile::OatClass::GetOatMethod(uint32_t method_index) const { 566 const OatMethodOffsets* oat_method_offsets = GetOatMethodOffsets(method_index); 567 if (oat_method_offsets == nullptr) { 568 return OatMethod(nullptr, 0, 0); 569 } 570 if (oat_file_->IsExecutable() || 571 Runtime::Current() == nullptr || // This case applies for oatdump. 572 Runtime::Current()->IsCompiler()) { 573 return OatMethod( 574 oat_file_->Begin(), 575 oat_method_offsets->code_offset_, 576 oat_method_offsets->gc_map_offset_); 577 } else { 578 // We aren't allowed to use the compiled code. We just force it down the interpreted version. 579 return OatMethod(oat_file_->Begin(), 0, 0); 580 } 581 } 582 583 OatFile::OatMethod::OatMethod(const byte* base, 584 const uint32_t code_offset, 585 const uint32_t gc_map_offset) 586 : begin_(base), 587 code_offset_(code_offset), 588 native_gc_map_offset_(gc_map_offset) { 589 } 590 591 OatFile::OatMethod::~OatMethod() {} 592 593 void OatFile::OatMethod::LinkMethod(mirror::ArtMethod* method) const { 594 CHECK(method != NULL); 595 #if defined(ART_USE_PORTABLE_COMPILER) 596 method->SetEntryPointFromPortableCompiledCode(GetPortableCode()); 597 #endif 598 method->SetEntryPointFromQuickCompiledCode(GetQuickCode()); 599 method->SetNativeGcMap(GetNativeGcMap()); 600 } 601 602 } // namespace art 603
