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 "dex_file.h" 18 19 #include <fcntl.h> 20 #include <limits.h> 21 #include <stdio.h> 22 #include <stdlib.h> 23 #include <string.h> 24 #include <sys/file.h> 25 #include <sys/stat.h> 26 27 #include <memory> 28 #include <sstream> 29 30 #include "art_field-inl.h" 31 #include "art_method-inl.h" 32 #include "base/file_magic.h" 33 #include "base/hash_map.h" 34 #include "base/logging.h" 35 #include "base/stl_util.h" 36 #include "base/stringprintf.h" 37 #include "base/systrace.h" 38 #include "class_linker-inl.h" 39 #include "dex_file-inl.h" 40 #include "dex_file_verifier.h" 41 #include "globals.h" 42 #include "handle_scope-inl.h" 43 #include "leb128.h" 44 #include "mirror/field.h" 45 #include "mirror/method.h" 46 #include "mirror/string.h" 47 #include "os.h" 48 #include "reflection.h" 49 #include "safe_map.h" 50 #include "thread.h" 51 #include "type_lookup_table.h" 52 #include "utf-inl.h" 53 #include "utils.h" 54 #include "well_known_classes.h" 55 #include "zip_archive.h" 56 57 #pragma GCC diagnostic push 58 #pragma GCC diagnostic ignored "-Wshadow" 59 #include "ScopedFd.h" 60 #pragma GCC diagnostic pop 61 62 namespace art { 63 64 const uint8_t DexFile::kDexMagic[] = { 'd', 'e', 'x', '\n' }; 65 const uint8_t DexFile::kDexMagicVersions[DexFile::kNumDexVersions][DexFile::kDexVersionLen] = { 66 {'0', '3', '5', '\0'}, 67 // Dex version 036 skipped because of an old dalvik bug on some versions of android where dex 68 // files with that version number would erroneously be accepted and run. 69 {'0', '3', '7', '\0'} 70 }; 71 72 bool DexFile::GetChecksum(const char* filename, uint32_t* checksum, std::string* error_msg) { 73 CHECK(checksum != nullptr); 74 uint32_t magic; 75 76 // Strip ":...", which is the location 77 const char* zip_entry_name = kClassesDex; 78 const char* file_part = filename; 79 std::string file_part_storage; 80 81 if (DexFile::IsMultiDexLocation(filename)) { 82 file_part_storage = GetBaseLocation(filename); 83 file_part = file_part_storage.c_str(); 84 zip_entry_name = filename + file_part_storage.size() + 1; 85 DCHECK_EQ(zip_entry_name[-1], kMultiDexSeparator); 86 } 87 88 ScopedFd fd(OpenAndReadMagic(file_part, &magic, error_msg)); 89 if (fd.get() == -1) { 90 DCHECK(!error_msg->empty()); 91 return false; 92 } 93 if (IsZipMagic(magic)) { 94 std::unique_ptr<ZipArchive> zip_archive( 95 ZipArchive::OpenFromFd(fd.release(), filename, error_msg)); 96 if (zip_archive.get() == nullptr) { 97 *error_msg = StringPrintf("Failed to open zip archive '%s' (error msg: %s)", file_part, 98 error_msg->c_str()); 99 return false; 100 } 101 std::unique_ptr<ZipEntry> zip_entry(zip_archive->Find(zip_entry_name, error_msg)); 102 if (zip_entry.get() == nullptr) { 103 *error_msg = StringPrintf("Zip archive '%s' doesn't contain %s (error msg: %s)", file_part, 104 zip_entry_name, error_msg->c_str()); 105 return false; 106 } 107 *checksum = zip_entry->GetCrc32(); 108 return true; 109 } 110 if (IsDexMagic(magic)) { 111 std::unique_ptr<const DexFile> dex_file( 112 DexFile::OpenFile(fd.release(), filename, false, error_msg)); 113 if (dex_file.get() == nullptr) { 114 return false; 115 } 116 *checksum = dex_file->GetHeader().checksum_; 117 return true; 118 } 119 *error_msg = StringPrintf("Expected valid zip or dex file: '%s'", filename); 120 return false; 121 } 122 123 bool DexFile::Open(const char* filename, const char* location, std::string* error_msg, 124 std::vector<std::unique_ptr<const DexFile>>* dex_files) { 125 ScopedTrace trace(std::string("Open dex file ") + location); 126 DCHECK(dex_files != nullptr) << "DexFile::Open: out-param is nullptr"; 127 uint32_t magic; 128 ScopedFd fd(OpenAndReadMagic(filename, &magic, error_msg)); 129 if (fd.get() == -1) { 130 DCHECK(!error_msg->empty()); 131 return false; 132 } 133 if (IsZipMagic(magic)) { 134 return DexFile::OpenZip(fd.release(), location, error_msg, dex_files); 135 } 136 if (IsDexMagic(magic)) { 137 std::unique_ptr<const DexFile> dex_file(DexFile::OpenFile(fd.release(), location, true, 138 error_msg)); 139 if (dex_file.get() != nullptr) { 140 dex_files->push_back(std::move(dex_file)); 141 return true; 142 } else { 143 return false; 144 } 145 } 146 *error_msg = StringPrintf("Expected valid zip or dex file: '%s'", filename); 147 return false; 148 } 149 150 static bool ContainsClassesDex(int fd, const char* filename) { 151 std::string error_msg; 152 std::unique_ptr<ZipArchive> zip_archive(ZipArchive::OpenFromFd(fd, filename, &error_msg)); 153 if (zip_archive.get() == nullptr) { 154 return false; 155 } 156 std::unique_ptr<ZipEntry> zip_entry(zip_archive->Find(DexFile::kClassesDex, &error_msg)); 157 return (zip_entry.get() != nullptr); 158 } 159 160 bool DexFile::MaybeDex(const char* filename) { 161 uint32_t magic; 162 std::string error_msg; 163 ScopedFd fd(OpenAndReadMagic(filename, &magic, &error_msg)); 164 if (fd.get() == -1) { 165 return false; 166 } 167 if (IsZipMagic(magic)) { 168 return ContainsClassesDex(fd.release(), filename); 169 } else if (IsDexMagic(magic)) { 170 return true; 171 } 172 return false; 173 } 174 175 int DexFile::GetPermissions() const { 176 if (mem_map_.get() == nullptr) { 177 return 0; 178 } else { 179 return mem_map_->GetProtect(); 180 } 181 } 182 183 bool DexFile::IsReadOnly() const { 184 return GetPermissions() == PROT_READ; 185 } 186 187 bool DexFile::EnableWrite() const { 188 CHECK(IsReadOnly()); 189 if (mem_map_.get() == nullptr) { 190 return false; 191 } else { 192 return mem_map_->Protect(PROT_READ | PROT_WRITE); 193 } 194 } 195 196 bool DexFile::DisableWrite() const { 197 CHECK(!IsReadOnly()); 198 if (mem_map_.get() == nullptr) { 199 return false; 200 } else { 201 return mem_map_->Protect(PROT_READ); 202 } 203 } 204 205 std::unique_ptr<const DexFile> DexFile::Open(const uint8_t* base, size_t size, 206 const std::string& location, 207 uint32_t location_checksum, 208 const OatDexFile* oat_dex_file, 209 bool verify, 210 std::string* error_msg) { 211 ScopedTrace trace(std::string("Open dex file from RAM ") + location); 212 std::unique_ptr<const DexFile> dex_file = OpenMemory(base, 213 size, 214 location, 215 location_checksum, 216 nullptr, 217 oat_dex_file, 218 error_msg); 219 if (verify && !DexFileVerifier::Verify(dex_file.get(), 220 dex_file->Begin(), 221 dex_file->Size(), 222 location.c_str(), 223 error_msg)) { 224 return nullptr; 225 } 226 227 return dex_file; 228 } 229 230 std::unique_ptr<const DexFile> DexFile::OpenFile(int fd, const char* location, bool verify, 231 std::string* error_msg) { 232 ScopedTrace trace(std::string("Open dex file ") + location); 233 CHECK(location != nullptr); 234 std::unique_ptr<MemMap> map; 235 { 236 ScopedFd delayed_close(fd); 237 struct stat sbuf; 238 memset(&sbuf, 0, sizeof(sbuf)); 239 if (fstat(fd, &sbuf) == -1) { 240 *error_msg = StringPrintf("DexFile: fstat '%s' failed: %s", location, strerror(errno)); 241 return nullptr; 242 } 243 if (S_ISDIR(sbuf.st_mode)) { 244 *error_msg = StringPrintf("Attempt to mmap directory '%s'", location); 245 return nullptr; 246 } 247 size_t length = sbuf.st_size; 248 map.reset(MemMap::MapFile(length, 249 PROT_READ, 250 MAP_PRIVATE, 251 fd, 252 0, 253 /*low_4gb*/false, 254 location, 255 error_msg)); 256 if (map.get() == nullptr) { 257 DCHECK(!error_msg->empty()); 258 return nullptr; 259 } 260 } 261 262 if (map->Size() < sizeof(DexFile::Header)) { 263 *error_msg = StringPrintf( 264 "DexFile: failed to open dex file '%s' that is too short to have a header", location); 265 return nullptr; 266 } 267 268 const Header* dex_header = reinterpret_cast<const Header*>(map->Begin()); 269 270 std::unique_ptr<const DexFile> dex_file(OpenMemory(location, dex_header->checksum_, map.release(), 271 error_msg)); 272 if (dex_file.get() == nullptr) { 273 *error_msg = StringPrintf("Failed to open dex file '%s' from memory: %s", location, 274 error_msg->c_str()); 275 return nullptr; 276 } 277 278 if (verify && !DexFileVerifier::Verify(dex_file.get(), dex_file->Begin(), dex_file->Size(), 279 location, error_msg)) { 280 return nullptr; 281 } 282 283 return dex_file; 284 } 285 286 const char* DexFile::kClassesDex = "classes.dex"; 287 288 bool DexFile::OpenZip(int fd, const std::string& location, std::string* error_msg, 289 std::vector<std::unique_ptr<const DexFile>>* dex_files) { 290 ScopedTrace trace("Dex file open Zip " + std::string(location)); 291 DCHECK(dex_files != nullptr) << "DexFile::OpenZip: out-param is nullptr"; 292 std::unique_ptr<ZipArchive> zip_archive(ZipArchive::OpenFromFd(fd, location.c_str(), error_msg)); 293 if (zip_archive.get() == nullptr) { 294 DCHECK(!error_msg->empty()); 295 return false; 296 } 297 return DexFile::OpenFromZip(*zip_archive, location, error_msg, dex_files); 298 } 299 300 std::unique_ptr<const DexFile> DexFile::OpenMemory(const std::string& location, 301 uint32_t location_checksum, 302 MemMap* mem_map, 303 std::string* error_msg) { 304 return OpenMemory(mem_map->Begin(), 305 mem_map->Size(), 306 location, 307 location_checksum, 308 mem_map, 309 nullptr, 310 error_msg); 311 } 312 313 std::unique_ptr<const DexFile> DexFile::Open(const ZipArchive& zip_archive, const char* entry_name, 314 const std::string& location, std::string* error_msg, 315 ZipOpenErrorCode* error_code) { 316 ScopedTrace trace("Dex file open from Zip Archive " + std::string(location)); 317 CHECK(!location.empty()); 318 std::unique_ptr<ZipEntry> zip_entry(zip_archive.Find(entry_name, error_msg)); 319 if (zip_entry.get() == nullptr) { 320 *error_code = ZipOpenErrorCode::kEntryNotFound; 321 return nullptr; 322 } 323 std::unique_ptr<MemMap> map(zip_entry->ExtractToMemMap(location.c_str(), entry_name, error_msg)); 324 if (map.get() == nullptr) { 325 *error_msg = StringPrintf("Failed to extract '%s' from '%s': %s", entry_name, location.c_str(), 326 error_msg->c_str()); 327 *error_code = ZipOpenErrorCode::kExtractToMemoryError; 328 return nullptr; 329 } 330 std::unique_ptr<const DexFile> dex_file(OpenMemory(location, zip_entry->GetCrc32(), map.release(), 331 error_msg)); 332 if (dex_file.get() == nullptr) { 333 *error_msg = StringPrintf("Failed to open dex file '%s' from memory: %s", location.c_str(), 334 error_msg->c_str()); 335 *error_code = ZipOpenErrorCode::kDexFileError; 336 return nullptr; 337 } 338 if (!dex_file->DisableWrite()) { 339 *error_msg = StringPrintf("Failed to make dex file '%s' read only", location.c_str()); 340 *error_code = ZipOpenErrorCode::kMakeReadOnlyError; 341 return nullptr; 342 } 343 CHECK(dex_file->IsReadOnly()) << location; 344 if (!DexFileVerifier::Verify(dex_file.get(), dex_file->Begin(), dex_file->Size(), 345 location.c_str(), error_msg)) { 346 *error_code = ZipOpenErrorCode::kVerifyError; 347 return nullptr; 348 } 349 *error_code = ZipOpenErrorCode::kNoError; 350 return dex_file; 351 } 352 353 // Technically we do not have a limitation with respect to the number of dex files that can be in a 354 // multidex APK. However, it's bad practice, as each dex file requires its own tables for symbols 355 // (types, classes, methods, ...) and dex caches. So warn the user that we open a zip with what 356 // seems an excessive number. 357 static constexpr size_t kWarnOnManyDexFilesThreshold = 100; 358 359 bool DexFile::OpenFromZip(const ZipArchive& zip_archive, const std::string& location, 360 std::string* error_msg, 361 std::vector<std::unique_ptr<const DexFile>>* dex_files) { 362 ScopedTrace trace("Dex file open from Zip " + std::string(location)); 363 DCHECK(dex_files != nullptr) << "DexFile::OpenFromZip: out-param is nullptr"; 364 ZipOpenErrorCode error_code; 365 std::unique_ptr<const DexFile> dex_file(Open(zip_archive, kClassesDex, location, error_msg, 366 &error_code)); 367 if (dex_file.get() == nullptr) { 368 return false; 369 } else { 370 // Had at least classes.dex. 371 dex_files->push_back(std::move(dex_file)); 372 373 // Now try some more. 374 375 // We could try to avoid std::string allocations by working on a char array directly. As we 376 // do not expect a lot of iterations, this seems too involved and brittle. 377 378 for (size_t i = 1; ; ++i) { 379 std::string name = GetMultiDexClassesDexName(i); 380 std::string fake_location = GetMultiDexLocation(i, location.c_str()); 381 std::unique_ptr<const DexFile> next_dex_file(Open(zip_archive, name.c_str(), fake_location, 382 error_msg, &error_code)); 383 if (next_dex_file.get() == nullptr) { 384 if (error_code != ZipOpenErrorCode::kEntryNotFound) { 385 LOG(WARNING) << error_msg; 386 } 387 break; 388 } else { 389 dex_files->push_back(std::move(next_dex_file)); 390 } 391 392 if (i == kWarnOnManyDexFilesThreshold) { 393 LOG(WARNING) << location << " has in excess of " << kWarnOnManyDexFilesThreshold 394 << " dex files. Please consider coalescing and shrinking the number to " 395 " avoid runtime overhead."; 396 } 397 398 if (i == std::numeric_limits<size_t>::max()) { 399 LOG(ERROR) << "Overflow in number of dex files!"; 400 break; 401 } 402 } 403 404 return true; 405 } 406 } 407 408 409 std::unique_ptr<const DexFile> DexFile::OpenMemory(const uint8_t* base, 410 size_t size, 411 const std::string& location, 412 uint32_t location_checksum, 413 MemMap* mem_map, 414 const OatDexFile* oat_dex_file, 415 std::string* error_msg) { 416 CHECK_ALIGNED(base, 4); // various dex file structures must be word aligned 417 std::unique_ptr<DexFile> dex_file( 418 new DexFile(base, size, location, location_checksum, mem_map, oat_dex_file)); 419 if (!dex_file->Init(error_msg)) { 420 dex_file.reset(); 421 } 422 return std::unique_ptr<const DexFile>(dex_file.release()); 423 } 424 425 DexFile::DexFile(const uint8_t* base, size_t size, 426 const std::string& location, 427 uint32_t location_checksum, 428 MemMap* mem_map, 429 const OatDexFile* oat_dex_file) 430 : begin_(base), 431 size_(size), 432 location_(location), 433 location_checksum_(location_checksum), 434 mem_map_(mem_map), 435 header_(reinterpret_cast<const Header*>(base)), 436 string_ids_(reinterpret_cast<const StringId*>(base + header_->string_ids_off_)), 437 type_ids_(reinterpret_cast<const TypeId*>(base + header_->type_ids_off_)), 438 field_ids_(reinterpret_cast<const FieldId*>(base + header_->field_ids_off_)), 439 method_ids_(reinterpret_cast<const MethodId*>(base + header_->method_ids_off_)), 440 proto_ids_(reinterpret_cast<const ProtoId*>(base + header_->proto_ids_off_)), 441 class_defs_(reinterpret_cast<const ClassDef*>(base + header_->class_defs_off_)), 442 oat_dex_file_(oat_dex_file) { 443 CHECK(begin_ != nullptr) << GetLocation(); 444 CHECK_GT(size_, 0U) << GetLocation(); 445 const uint8_t* lookup_data = (oat_dex_file != nullptr) 446 ? oat_dex_file->GetLookupTableData() 447 : nullptr; 448 if (lookup_data != nullptr) { 449 if (lookup_data + TypeLookupTable::RawDataLength(*this) > oat_dex_file->GetOatFile()->End()) { 450 LOG(WARNING) << "found truncated lookup table in " << GetLocation(); 451 } else { 452 lookup_table_.reset(TypeLookupTable::Open(lookup_data, *this)); 453 } 454 } 455 } 456 457 DexFile::~DexFile() { 458 // We don't call DeleteGlobalRef on dex_object_ because we're only called by DestroyJavaVM, and 459 // that's only called after DetachCurrentThread, which means there's no JNIEnv. We could 460 // re-attach, but cleaning up these global references is not obviously useful. It's not as if 461 // the global reference table is otherwise empty! 462 } 463 464 bool DexFile::Init(std::string* error_msg) { 465 if (!CheckMagicAndVersion(error_msg)) { 466 return false; 467 } 468 return true; 469 } 470 471 bool DexFile::CheckMagicAndVersion(std::string* error_msg) const { 472 if (!IsMagicValid(header_->magic_)) { 473 std::ostringstream oss; 474 oss << "Unrecognized magic number in " << GetLocation() << ":" 475 << " " << header_->magic_[0] 476 << " " << header_->magic_[1] 477 << " " << header_->magic_[2] 478 << " " << header_->magic_[3]; 479 *error_msg = oss.str(); 480 return false; 481 } 482 if (!IsVersionValid(header_->magic_)) { 483 std::ostringstream oss; 484 oss << "Unrecognized version number in " << GetLocation() << ":" 485 << " " << header_->magic_[4] 486 << " " << header_->magic_[5] 487 << " " << header_->magic_[6] 488 << " " << header_->magic_[7]; 489 *error_msg = oss.str(); 490 return false; 491 } 492 return true; 493 } 494 495 bool DexFile::IsMagicValid(const uint8_t* magic) { 496 return (memcmp(magic, kDexMagic, sizeof(kDexMagic)) == 0); 497 } 498 499 bool DexFile::IsVersionValid(const uint8_t* magic) { 500 const uint8_t* version = &magic[sizeof(kDexMagic)]; 501 for (uint32_t i = 0; i < kNumDexVersions; i++) { 502 if (memcmp(version, kDexMagicVersions[i], kDexVersionLen) == 0) { 503 return true; 504 } 505 } 506 return false; 507 } 508 509 uint32_t DexFile::Header::GetVersion() const { 510 const char* version = reinterpret_cast<const char*>(&magic_[sizeof(kDexMagic)]); 511 return atoi(version); 512 } 513 514 const DexFile::ClassDef* DexFile::FindClassDef(const char* descriptor, size_t hash) const { 515 DCHECK_EQ(ComputeModifiedUtf8Hash(descriptor), hash); 516 if (LIKELY(lookup_table_ != nullptr)) { 517 const uint32_t class_def_idx = lookup_table_->Lookup(descriptor, hash); 518 return (class_def_idx != DexFile::kDexNoIndex) ? &GetClassDef(class_def_idx) : nullptr; 519 } 520 521 // Fast path for rate no class defs case. 522 const uint32_t num_class_defs = NumClassDefs(); 523 if (num_class_defs == 0) { 524 return nullptr; 525 } 526 const TypeId* type_id = FindTypeId(descriptor); 527 if (type_id != nullptr) { 528 uint16_t type_idx = GetIndexForTypeId(*type_id); 529 for (size_t i = 0; i < num_class_defs; ++i) { 530 const ClassDef& class_def = GetClassDef(i); 531 if (class_def.class_idx_ == type_idx) { 532 return &class_def; 533 } 534 } 535 } 536 return nullptr; 537 } 538 539 const DexFile::ClassDef* DexFile::FindClassDef(uint16_t type_idx) const { 540 size_t num_class_defs = NumClassDefs(); 541 for (size_t i = 0; i < num_class_defs; ++i) { 542 const ClassDef& class_def = GetClassDef(i); 543 if (class_def.class_idx_ == type_idx) { 544 return &class_def; 545 } 546 } 547 return nullptr; 548 } 549 550 const DexFile::FieldId* DexFile::FindFieldId(const DexFile::TypeId& declaring_klass, 551 const DexFile::StringId& name, 552 const DexFile::TypeId& type) const { 553 // Binary search MethodIds knowing that they are sorted by class_idx, name_idx then proto_idx 554 const uint16_t class_idx = GetIndexForTypeId(declaring_klass); 555 const uint32_t name_idx = GetIndexForStringId(name); 556 const uint16_t type_idx = GetIndexForTypeId(type); 557 int32_t lo = 0; 558 int32_t hi = NumFieldIds() - 1; 559 while (hi >= lo) { 560 int32_t mid = (hi + lo) / 2; 561 const DexFile::FieldId& field = GetFieldId(mid); 562 if (class_idx > field.class_idx_) { 563 lo = mid + 1; 564 } else if (class_idx < field.class_idx_) { 565 hi = mid - 1; 566 } else { 567 if (name_idx > field.name_idx_) { 568 lo = mid + 1; 569 } else if (name_idx < field.name_idx_) { 570 hi = mid - 1; 571 } else { 572 if (type_idx > field.type_idx_) { 573 lo = mid + 1; 574 } else if (type_idx < field.type_idx_) { 575 hi = mid - 1; 576 } else { 577 return &field; 578 } 579 } 580 } 581 } 582 return nullptr; 583 } 584 585 const DexFile::MethodId* DexFile::FindMethodId(const DexFile::TypeId& declaring_klass, 586 const DexFile::StringId& name, 587 const DexFile::ProtoId& signature) const { 588 // Binary search MethodIds knowing that they are sorted by class_idx, name_idx then proto_idx 589 const uint16_t class_idx = GetIndexForTypeId(declaring_klass); 590 const uint32_t name_idx = GetIndexForStringId(name); 591 const uint16_t proto_idx = GetIndexForProtoId(signature); 592 int32_t lo = 0; 593 int32_t hi = NumMethodIds() - 1; 594 while (hi >= lo) { 595 int32_t mid = (hi + lo) / 2; 596 const DexFile::MethodId& method = GetMethodId(mid); 597 if (class_idx > method.class_idx_) { 598 lo = mid + 1; 599 } else if (class_idx < method.class_idx_) { 600 hi = mid - 1; 601 } else { 602 if (name_idx > method.name_idx_) { 603 lo = mid + 1; 604 } else if (name_idx < method.name_idx_) { 605 hi = mid - 1; 606 } else { 607 if (proto_idx > method.proto_idx_) { 608 lo = mid + 1; 609 } else if (proto_idx < method.proto_idx_) { 610 hi = mid - 1; 611 } else { 612 return &method; 613 } 614 } 615 } 616 } 617 return nullptr; 618 } 619 620 const DexFile::StringId* DexFile::FindStringId(const char* string) const { 621 int32_t lo = 0; 622 int32_t hi = NumStringIds() - 1; 623 while (hi >= lo) { 624 int32_t mid = (hi + lo) / 2; 625 const DexFile::StringId& str_id = GetStringId(mid); 626 const char* str = GetStringData(str_id); 627 int compare = CompareModifiedUtf8ToModifiedUtf8AsUtf16CodePointValues(string, str); 628 if (compare > 0) { 629 lo = mid + 1; 630 } else if (compare < 0) { 631 hi = mid - 1; 632 } else { 633 return &str_id; 634 } 635 } 636 return nullptr; 637 } 638 639 const DexFile::TypeId* DexFile::FindTypeId(const char* string) const { 640 int32_t lo = 0; 641 int32_t hi = NumTypeIds() - 1; 642 while (hi >= lo) { 643 int32_t mid = (hi + lo) / 2; 644 const TypeId& type_id = GetTypeId(mid); 645 const DexFile::StringId& str_id = GetStringId(type_id.descriptor_idx_); 646 const char* str = GetStringData(str_id); 647 int compare = CompareModifiedUtf8ToModifiedUtf8AsUtf16CodePointValues(string, str); 648 if (compare > 0) { 649 lo = mid + 1; 650 } else if (compare < 0) { 651 hi = mid - 1; 652 } else { 653 return &type_id; 654 } 655 } 656 return nullptr; 657 } 658 659 const DexFile::StringId* DexFile::FindStringId(const uint16_t* string, size_t length) const { 660 int32_t lo = 0; 661 int32_t hi = NumStringIds() - 1; 662 while (hi >= lo) { 663 int32_t mid = (hi + lo) / 2; 664 const DexFile::StringId& str_id = GetStringId(mid); 665 const char* str = GetStringData(str_id); 666 int compare = CompareModifiedUtf8ToUtf16AsCodePointValues(str, string, length); 667 if (compare > 0) { 668 lo = mid + 1; 669 } else if (compare < 0) { 670 hi = mid - 1; 671 } else { 672 return &str_id; 673 } 674 } 675 return nullptr; 676 } 677 678 const DexFile::TypeId* DexFile::FindTypeId(uint32_t string_idx) const { 679 int32_t lo = 0; 680 int32_t hi = NumTypeIds() - 1; 681 while (hi >= lo) { 682 int32_t mid = (hi + lo) / 2; 683 const TypeId& type_id = GetTypeId(mid); 684 if (string_idx > type_id.descriptor_idx_) { 685 lo = mid + 1; 686 } else if (string_idx < type_id.descriptor_idx_) { 687 hi = mid - 1; 688 } else { 689 return &type_id; 690 } 691 } 692 return nullptr; 693 } 694 695 const DexFile::ProtoId* DexFile::FindProtoId(uint16_t return_type_idx, 696 const uint16_t* signature_type_idxs, 697 uint32_t signature_length) const { 698 int32_t lo = 0; 699 int32_t hi = NumProtoIds() - 1; 700 while (hi >= lo) { 701 int32_t mid = (hi + lo) / 2; 702 const DexFile::ProtoId& proto = GetProtoId(mid); 703 int compare = return_type_idx - proto.return_type_idx_; 704 if (compare == 0) { 705 DexFileParameterIterator it(*this, proto); 706 size_t i = 0; 707 while (it.HasNext() && i < signature_length && compare == 0) { 708 compare = signature_type_idxs[i] - it.GetTypeIdx(); 709 it.Next(); 710 i++; 711 } 712 if (compare == 0) { 713 if (it.HasNext()) { 714 compare = -1; 715 } else if (i < signature_length) { 716 compare = 1; 717 } 718 } 719 } 720 if (compare > 0) { 721 lo = mid + 1; 722 } else if (compare < 0) { 723 hi = mid - 1; 724 } else { 725 return &proto; 726 } 727 } 728 return nullptr; 729 } 730 731 void DexFile::CreateTypeLookupTable(uint8_t* storage) const { 732 lookup_table_.reset(TypeLookupTable::Create(*this, storage)); 733 } 734 735 // Given a signature place the type ids into the given vector 736 bool DexFile::CreateTypeList(const StringPiece& signature, uint16_t* return_type_idx, 737 std::vector<uint16_t>* param_type_idxs) const { 738 if (signature[0] != '(') { 739 return false; 740 } 741 size_t offset = 1; 742 size_t end = signature.size(); 743 bool process_return = false; 744 while (offset < end) { 745 size_t start_offset = offset; 746 char c = signature[offset]; 747 offset++; 748 if (c == ')') { 749 process_return = true; 750 continue; 751 } 752 while (c == '[') { // process array prefix 753 if (offset >= end) { // expect some descriptor following [ 754 return false; 755 } 756 c = signature[offset]; 757 offset++; 758 } 759 if (c == 'L') { // process type descriptors 760 do { 761 if (offset >= end) { // unexpected early termination of descriptor 762 return false; 763 } 764 c = signature[offset]; 765 offset++; 766 } while (c != ';'); 767 } 768 // TODO: avoid creating a std::string just to get a 0-terminated char array 769 std::string descriptor(signature.data() + start_offset, offset - start_offset); 770 const DexFile::TypeId* type_id = FindTypeId(descriptor.c_str()); 771 if (type_id == nullptr) { 772 return false; 773 } 774 uint16_t type_idx = GetIndexForTypeId(*type_id); 775 if (!process_return) { 776 param_type_idxs->push_back(type_idx); 777 } else { 778 *return_type_idx = type_idx; 779 return offset == end; // return true if the signature had reached a sensible end 780 } 781 } 782 return false; // failed to correctly parse return type 783 } 784 785 const Signature DexFile::CreateSignature(const StringPiece& signature) const { 786 uint16_t return_type_idx; 787 std::vector<uint16_t> param_type_indices; 788 bool success = CreateTypeList(signature, &return_type_idx, ¶m_type_indices); 789 if (!success) { 790 return Signature::NoSignature(); 791 } 792 const ProtoId* proto_id = FindProtoId(return_type_idx, param_type_indices); 793 if (proto_id == nullptr) { 794 return Signature::NoSignature(); 795 } 796 return Signature(this, *proto_id); 797 } 798 799 int32_t DexFile::GetLineNumFromPC(ArtMethod* method, uint32_t rel_pc) const { 800 // For native method, lineno should be -2 to indicate it is native. Note that 801 // "line number == -2" is how libcore tells from StackTraceElement. 802 if (method->GetCodeItemOffset() == 0) { 803 return -2; 804 } 805 806 const CodeItem* code_item = GetCodeItem(method->GetCodeItemOffset()); 807 DCHECK(code_item != nullptr) << PrettyMethod(method) << " " << GetLocation(); 808 809 // A method with no line number info should return -1 810 LineNumFromPcContext context(rel_pc, -1); 811 DecodeDebugPositionInfo(code_item, LineNumForPcCb, &context); 812 return context.line_num_; 813 } 814 815 int32_t DexFile::FindTryItem(const CodeItem &code_item, uint32_t address) { 816 // Note: Signed type is important for max and min. 817 int32_t min = 0; 818 int32_t max = code_item.tries_size_ - 1; 819 820 while (min <= max) { 821 int32_t mid = min + ((max - min) / 2); 822 823 const art::DexFile::TryItem* ti = GetTryItems(code_item, mid); 824 uint32_t start = ti->start_addr_; 825 uint32_t end = start + ti->insn_count_; 826 827 if (address < start) { 828 max = mid - 1; 829 } else if (address >= end) { 830 min = mid + 1; 831 } else { // We have a winner! 832 return mid; 833 } 834 } 835 // No match. 836 return -1; 837 } 838 839 int32_t DexFile::FindCatchHandlerOffset(const CodeItem &code_item, uint32_t address) { 840 int32_t try_item = FindTryItem(code_item, address); 841 if (try_item == -1) { 842 return -1; 843 } else { 844 return DexFile::GetTryItems(code_item, try_item)->handler_off_; 845 } 846 } 847 848 bool DexFile::DecodeDebugLocalInfo(const CodeItem* code_item, bool is_static, uint32_t method_idx, 849 DexDebugNewLocalCb local_cb, void* context) const { 850 DCHECK(local_cb != nullptr); 851 if (code_item == nullptr) { 852 return false; 853 } 854 const uint8_t* stream = GetDebugInfoStream(code_item); 855 if (stream == nullptr) { 856 return false; 857 } 858 std::vector<LocalInfo> local_in_reg(code_item->registers_size_); 859 860 uint16_t arg_reg = code_item->registers_size_ - code_item->ins_size_; 861 if (!is_static) { 862 const char* descriptor = GetMethodDeclaringClassDescriptor(GetMethodId(method_idx)); 863 local_in_reg[arg_reg].name_ = "this"; 864 local_in_reg[arg_reg].descriptor_ = descriptor; 865 local_in_reg[arg_reg].signature_ = nullptr; 866 local_in_reg[arg_reg].start_address_ = 0; 867 local_in_reg[arg_reg].reg_ = arg_reg; 868 local_in_reg[arg_reg].is_live_ = true; 869 arg_reg++; 870 } 871 872 DexFileParameterIterator it(*this, GetMethodPrototype(GetMethodId(method_idx))); 873 DecodeUnsignedLeb128(&stream); // Line. 874 uint32_t parameters_size = DecodeUnsignedLeb128(&stream); 875 uint32_t i; 876 for (i = 0; i < parameters_size && it.HasNext(); ++i, it.Next()) { 877 if (arg_reg >= code_item->registers_size_) { 878 LOG(ERROR) << "invalid stream - arg reg >= reg size (" << arg_reg 879 << " >= " << code_item->registers_size_ << ") in " << GetLocation(); 880 return false; 881 } 882 uint32_t name_idx = DecodeUnsignedLeb128P1(&stream); 883 const char* descriptor = it.GetDescriptor(); 884 local_in_reg[arg_reg].name_ = StringDataByIdx(name_idx); 885 local_in_reg[arg_reg].descriptor_ = descriptor; 886 local_in_reg[arg_reg].signature_ = nullptr; 887 local_in_reg[arg_reg].start_address_ = 0; 888 local_in_reg[arg_reg].reg_ = arg_reg; 889 local_in_reg[arg_reg].is_live_ = true; 890 switch (*descriptor) { 891 case 'D': 892 case 'J': 893 arg_reg += 2; 894 break; 895 default: 896 arg_reg += 1; 897 break; 898 } 899 } 900 if (i != parameters_size || it.HasNext()) { 901 LOG(ERROR) << "invalid stream - problem with parameter iterator in " << GetLocation() 902 << " for method " << PrettyMethod(method_idx, *this); 903 return false; 904 } 905 906 uint32_t address = 0; 907 for (;;) { 908 uint8_t opcode = *stream++; 909 switch (opcode) { 910 case DBG_END_SEQUENCE: 911 // Emit all variables which are still alive at the end of the method. 912 for (uint16_t reg = 0; reg < code_item->registers_size_; reg++) { 913 if (local_in_reg[reg].is_live_) { 914 local_in_reg[reg].end_address_ = code_item->insns_size_in_code_units_; 915 local_cb(context, local_in_reg[reg]); 916 } 917 } 918 return true; 919 case DBG_ADVANCE_PC: 920 address += DecodeUnsignedLeb128(&stream); 921 break; 922 case DBG_ADVANCE_LINE: 923 DecodeSignedLeb128(&stream); // Line. 924 break; 925 case DBG_START_LOCAL: 926 case DBG_START_LOCAL_EXTENDED: { 927 uint16_t reg = DecodeUnsignedLeb128(&stream); 928 if (reg >= code_item->registers_size_) { 929 LOG(ERROR) << "invalid stream - reg >= reg size (" << reg << " >= " 930 << code_item->registers_size_ << ") in " << GetLocation(); 931 return false; 932 } 933 934 uint32_t name_idx = DecodeUnsignedLeb128P1(&stream); 935 uint32_t descriptor_idx = DecodeUnsignedLeb128P1(&stream); 936 uint32_t signature_idx = kDexNoIndex; 937 if (opcode == DBG_START_LOCAL_EXTENDED) { 938 signature_idx = DecodeUnsignedLeb128P1(&stream); 939 } 940 941 // Emit what was previously there, if anything 942 if (local_in_reg[reg].is_live_) { 943 local_in_reg[reg].end_address_ = address; 944 local_cb(context, local_in_reg[reg]); 945 } 946 947 local_in_reg[reg].name_ = StringDataByIdx(name_idx); 948 local_in_reg[reg].descriptor_ = StringByTypeIdx(descriptor_idx); 949 local_in_reg[reg].signature_ = StringDataByIdx(signature_idx); 950 local_in_reg[reg].start_address_ = address; 951 local_in_reg[reg].reg_ = reg; 952 local_in_reg[reg].is_live_ = true; 953 break; 954 } 955 case DBG_END_LOCAL: { 956 uint16_t reg = DecodeUnsignedLeb128(&stream); 957 if (reg >= code_item->registers_size_) { 958 LOG(ERROR) << "invalid stream - reg >= reg size (" << reg << " >= " 959 << code_item->registers_size_ << ") in " << GetLocation(); 960 return false; 961 } 962 if (!local_in_reg[reg].is_live_) { 963 LOG(ERROR) << "invalid stream - end without start in " << GetLocation(); 964 return false; 965 } 966 local_in_reg[reg].end_address_ = address; 967 local_cb(context, local_in_reg[reg]); 968 local_in_reg[reg].is_live_ = false; 969 break; 970 } 971 case DBG_RESTART_LOCAL: { 972 uint16_t reg = DecodeUnsignedLeb128(&stream); 973 if (reg >= code_item->registers_size_) { 974 LOG(ERROR) << "invalid stream - reg >= reg size (" << reg << " >= " 975 << code_item->registers_size_ << ") in " << GetLocation(); 976 return false; 977 } 978 // If the register is live, the "restart" is superfluous, 979 // and we don't want to mess with the existing start address. 980 if (!local_in_reg[reg].is_live_) { 981 local_in_reg[reg].start_address_ = address; 982 local_in_reg[reg].is_live_ = true; 983 } 984 break; 985 } 986 case DBG_SET_PROLOGUE_END: 987 case DBG_SET_EPILOGUE_BEGIN: 988 break; 989 case DBG_SET_FILE: 990 DecodeUnsignedLeb128P1(&stream); // name. 991 break; 992 default: 993 address += (opcode - DBG_FIRST_SPECIAL) / DBG_LINE_RANGE; 994 break; 995 } 996 } 997 } 998 999 bool DexFile::DecodeDebugPositionInfo(const CodeItem* code_item, DexDebugNewPositionCb position_cb, 1000 void* context) const { 1001 DCHECK(position_cb != nullptr); 1002 if (code_item == nullptr) { 1003 return false; 1004 } 1005 const uint8_t* stream = GetDebugInfoStream(code_item); 1006 if (stream == nullptr) { 1007 return false; 1008 } 1009 1010 PositionInfo entry = PositionInfo(); 1011 entry.line_ = DecodeUnsignedLeb128(&stream); 1012 uint32_t parameters_size = DecodeUnsignedLeb128(&stream); 1013 for (uint32_t i = 0; i < parameters_size; ++i) { 1014 DecodeUnsignedLeb128P1(&stream); // Parameter name. 1015 } 1016 1017 for (;;) { 1018 uint8_t opcode = *stream++; 1019 switch (opcode) { 1020 case DBG_END_SEQUENCE: 1021 return true; // end of stream. 1022 case DBG_ADVANCE_PC: 1023 entry.address_ += DecodeUnsignedLeb128(&stream); 1024 break; 1025 case DBG_ADVANCE_LINE: 1026 entry.line_ += DecodeSignedLeb128(&stream); 1027 break; 1028 case DBG_START_LOCAL: 1029 DecodeUnsignedLeb128(&stream); // reg. 1030 DecodeUnsignedLeb128P1(&stream); // name. 1031 DecodeUnsignedLeb128P1(&stream); // descriptor. 1032 break; 1033 case DBG_START_LOCAL_EXTENDED: 1034 DecodeUnsignedLeb128(&stream); // reg. 1035 DecodeUnsignedLeb128P1(&stream); // name. 1036 DecodeUnsignedLeb128P1(&stream); // descriptor. 1037 DecodeUnsignedLeb128P1(&stream); // signature. 1038 break; 1039 case DBG_END_LOCAL: 1040 case DBG_RESTART_LOCAL: 1041 DecodeUnsignedLeb128(&stream); // reg. 1042 break; 1043 case DBG_SET_PROLOGUE_END: 1044 entry.prologue_end_ = true; 1045 break; 1046 case DBG_SET_EPILOGUE_BEGIN: 1047 entry.epilogue_begin_ = true; 1048 break; 1049 case DBG_SET_FILE: { 1050 uint32_t name_idx = DecodeUnsignedLeb128P1(&stream); 1051 entry.source_file_ = StringDataByIdx(name_idx); 1052 break; 1053 } 1054 default: { 1055 int adjopcode = opcode - DBG_FIRST_SPECIAL; 1056 entry.address_ += adjopcode / DBG_LINE_RANGE; 1057 entry.line_ += DBG_LINE_BASE + (adjopcode % DBG_LINE_RANGE); 1058 if (position_cb(context, entry)) { 1059 return true; // early exit. 1060 } 1061 entry.prologue_end_ = false; 1062 entry.epilogue_begin_ = false; 1063 break; 1064 } 1065 } 1066 } 1067 } 1068 1069 bool DexFile::LineNumForPcCb(void* raw_context, const PositionInfo& entry) { 1070 LineNumFromPcContext* context = reinterpret_cast<LineNumFromPcContext*>(raw_context); 1071 1072 // We know that this callback will be called in 1073 // ascending address order, so keep going until we find 1074 // a match or we've just gone past it. 1075 if (entry.address_ > context->address_) { 1076 // The line number from the previous positions callback 1077 // wil be the final result. 1078 return true; 1079 } else { 1080 context->line_num_ = entry.line_; 1081 return entry.address_ == context->address_; 1082 } 1083 } 1084 1085 bool DexFile::IsMultiDexLocation(const char* location) { 1086 return strrchr(location, kMultiDexSeparator) != nullptr; 1087 } 1088 1089 std::string DexFile::GetMultiDexClassesDexName(size_t index) { 1090 if (index == 0) { 1091 return "classes.dex"; 1092 } else { 1093 return StringPrintf("classes%zu.dex", index + 1); 1094 } 1095 } 1096 1097 std::string DexFile::GetMultiDexLocation(size_t index, const char* dex_location) { 1098 if (index == 0) { 1099 return dex_location; 1100 } else { 1101 return StringPrintf("%s" kMultiDexSeparatorString "classes%zu.dex", dex_location, index + 1); 1102 } 1103 } 1104 1105 std::string DexFile::GetDexCanonicalLocation(const char* dex_location) { 1106 CHECK_NE(dex_location, static_cast<const char*>(nullptr)); 1107 std::string base_location = GetBaseLocation(dex_location); 1108 const char* suffix = dex_location + base_location.size(); 1109 DCHECK(suffix[0] == 0 || suffix[0] == kMultiDexSeparator); 1110 UniqueCPtr<const char[]> path(realpath(base_location.c_str(), nullptr)); 1111 if (path != nullptr && path.get() != base_location) { 1112 return std::string(path.get()) + suffix; 1113 } else if (suffix[0] == 0) { 1114 return base_location; 1115 } else { 1116 return dex_location; 1117 } 1118 } 1119 1120 // Read a signed integer. "zwidth" is the zero-based byte count. 1121 static int32_t ReadSignedInt(const uint8_t* ptr, int zwidth) { 1122 int32_t val = 0; 1123 for (int i = zwidth; i >= 0; --i) { 1124 val = ((uint32_t)val >> 8) | (((int32_t)*ptr++) << 24); 1125 } 1126 val >>= (3 - zwidth) * 8; 1127 return val; 1128 } 1129 1130 // Read an unsigned integer. "zwidth" is the zero-based byte count, 1131 // "fill_on_right" indicates which side we want to zero-fill from. 1132 static uint32_t ReadUnsignedInt(const uint8_t* ptr, int zwidth, bool fill_on_right) { 1133 uint32_t val = 0; 1134 for (int i = zwidth; i >= 0; --i) { 1135 val = (val >> 8) | (((uint32_t)*ptr++) << 24); 1136 } 1137 if (!fill_on_right) { 1138 val >>= (3 - zwidth) * 8; 1139 } 1140 return val; 1141 } 1142 1143 // Read a signed long. "zwidth" is the zero-based byte count. 1144 static int64_t ReadSignedLong(const uint8_t* ptr, int zwidth) { 1145 int64_t val = 0; 1146 for (int i = zwidth; i >= 0; --i) { 1147 val = ((uint64_t)val >> 8) | (((int64_t)*ptr++) << 56); 1148 } 1149 val >>= (7 - zwidth) * 8; 1150 return val; 1151 } 1152 1153 // Read an unsigned long. "zwidth" is the zero-based byte count, 1154 // "fill_on_right" indicates which side we want to zero-fill from. 1155 static uint64_t ReadUnsignedLong(const uint8_t* ptr, int zwidth, bool fill_on_right) { 1156 uint64_t val = 0; 1157 for (int i = zwidth; i >= 0; --i) { 1158 val = (val >> 8) | (((uint64_t)*ptr++) << 56); 1159 } 1160 if (!fill_on_right) { 1161 val >>= (7 - zwidth) * 8; 1162 } 1163 return val; 1164 } 1165 1166 // Checks that visibility is as expected. Includes special behavior for M and 1167 // before to allow runtime and build visibility when expecting runtime. 1168 static bool IsVisibilityCompatible(uint32_t actual, uint32_t expected) { 1169 if (expected == DexFile::kDexVisibilityRuntime) { 1170 int32_t sdk_version = Runtime::Current()->GetTargetSdkVersion(); 1171 if (sdk_version > 0 && sdk_version <= 23) { 1172 return actual == DexFile::kDexVisibilityRuntime || actual == DexFile::kDexVisibilityBuild; 1173 } 1174 } 1175 return actual == expected; 1176 } 1177 1178 const DexFile::AnnotationSetItem* DexFile::FindAnnotationSetForField(ArtField* field) const { 1179 mirror::Class* klass = field->GetDeclaringClass(); 1180 const AnnotationsDirectoryItem* annotations_dir = GetAnnotationsDirectory(*klass->GetClassDef()); 1181 if (annotations_dir == nullptr) { 1182 return nullptr; 1183 } 1184 const FieldAnnotationsItem* field_annotations = GetFieldAnnotations(annotations_dir); 1185 if (field_annotations == nullptr) { 1186 return nullptr; 1187 } 1188 uint32_t field_index = field->GetDexFieldIndex(); 1189 uint32_t field_count = annotations_dir->fields_size_; 1190 for (uint32_t i = 0; i < field_count; ++i) { 1191 if (field_annotations[i].field_idx_ == field_index) { 1192 return GetFieldAnnotationSetItem(field_annotations[i]); 1193 } 1194 } 1195 return nullptr; 1196 } 1197 1198 mirror::Object* DexFile::GetAnnotationForField(ArtField* field, 1199 Handle<mirror::Class> annotation_class) const { 1200 const AnnotationSetItem* annotation_set = FindAnnotationSetForField(field); 1201 if (annotation_set == nullptr) { 1202 return nullptr; 1203 } 1204 StackHandleScope<1> hs(Thread::Current()); 1205 Handle<mirror::Class> field_class(hs.NewHandle(field->GetDeclaringClass())); 1206 return GetAnnotationObjectFromAnnotationSet( 1207 field_class, annotation_set, kDexVisibilityRuntime, annotation_class); 1208 } 1209 1210 mirror::ObjectArray<mirror::Object>* DexFile::GetAnnotationsForField(ArtField* field) const { 1211 const AnnotationSetItem* annotation_set = FindAnnotationSetForField(field); 1212 StackHandleScope<1> hs(Thread::Current()); 1213 Handle<mirror::Class> field_class(hs.NewHandle(field->GetDeclaringClass())); 1214 return ProcessAnnotationSet(field_class, annotation_set, kDexVisibilityRuntime); 1215 } 1216 1217 mirror::ObjectArray<mirror::String>* DexFile::GetSignatureAnnotationForField(ArtField* field) 1218 const { 1219 const AnnotationSetItem* annotation_set = FindAnnotationSetForField(field); 1220 if (annotation_set == nullptr) { 1221 return nullptr; 1222 } 1223 StackHandleScope<1> hs(Thread::Current()); 1224 Handle<mirror::Class> field_class(hs.NewHandle(field->GetDeclaringClass())); 1225 return GetSignatureValue(field_class, annotation_set); 1226 } 1227 1228 bool DexFile::IsFieldAnnotationPresent(ArtField* field, Handle<mirror::Class> annotation_class) 1229 const { 1230 const AnnotationSetItem* annotation_set = FindAnnotationSetForField(field); 1231 if (annotation_set == nullptr) { 1232 return false; 1233 } 1234 StackHandleScope<1> hs(Thread::Current()); 1235 Handle<mirror::Class> field_class(hs.NewHandle(field->GetDeclaringClass())); 1236 const AnnotationItem* annotation_item = GetAnnotationItemFromAnnotationSet( 1237 field_class, annotation_set, kDexVisibilityRuntime, annotation_class); 1238 return annotation_item != nullptr; 1239 } 1240 1241 const DexFile::AnnotationSetItem* DexFile::FindAnnotationSetForMethod(ArtMethod* method) const { 1242 mirror::Class* klass = method->GetDeclaringClass(); 1243 const AnnotationsDirectoryItem* annotations_dir = GetAnnotationsDirectory(*klass->GetClassDef()); 1244 if (annotations_dir == nullptr) { 1245 return nullptr; 1246 } 1247 const MethodAnnotationsItem* method_annotations = GetMethodAnnotations(annotations_dir); 1248 if (method_annotations == nullptr) { 1249 return nullptr; 1250 } 1251 uint32_t method_index = method->GetDexMethodIndex(); 1252 uint32_t method_count = annotations_dir->methods_size_; 1253 for (uint32_t i = 0; i < method_count; ++i) { 1254 if (method_annotations[i].method_idx_ == method_index) { 1255 return GetMethodAnnotationSetItem(method_annotations[i]); 1256 } 1257 } 1258 return nullptr; 1259 } 1260 1261 const DexFile::ParameterAnnotationsItem* DexFile::FindAnnotationsItemForMethod(ArtMethod* method) 1262 const { 1263 mirror::Class* klass = method->GetDeclaringClass(); 1264 const AnnotationsDirectoryItem* annotations_dir = GetAnnotationsDirectory(*klass->GetClassDef()); 1265 if (annotations_dir == nullptr) { 1266 return nullptr; 1267 } 1268 const ParameterAnnotationsItem* parameter_annotations = GetParameterAnnotations(annotations_dir); 1269 if (parameter_annotations == nullptr) { 1270 return nullptr; 1271 } 1272 uint32_t method_index = method->GetDexMethodIndex(); 1273 uint32_t parameter_count = annotations_dir->parameters_size_; 1274 for (uint32_t i = 0; i < parameter_count; ++i) { 1275 if (parameter_annotations[i].method_idx_ == method_index) { 1276 return ¶meter_annotations[i]; 1277 } 1278 } 1279 return nullptr; 1280 } 1281 1282 mirror::Object* DexFile::GetAnnotationDefaultValue(ArtMethod* method) const { 1283 mirror::Class* klass = method->GetDeclaringClass(); 1284 const AnnotationsDirectoryItem* annotations_dir = GetAnnotationsDirectory(*klass->GetClassDef()); 1285 if (annotations_dir == nullptr) { 1286 return nullptr; 1287 } 1288 const AnnotationSetItem* annotation_set = GetClassAnnotationSet(annotations_dir); 1289 if (annotation_set == nullptr) { 1290 return nullptr; 1291 } 1292 const AnnotationItem* annotation_item = SearchAnnotationSet(annotation_set, 1293 "Ldalvik/annotation/AnnotationDefault;", kDexVisibilitySystem); 1294 if (annotation_item == nullptr) { 1295 return nullptr; 1296 } 1297 const uint8_t* annotation = SearchEncodedAnnotation(annotation_item->annotation_, "value"); 1298 if (annotation == nullptr) { 1299 return nullptr; 1300 } 1301 uint8_t header_byte = *(annotation++); 1302 if ((header_byte & kDexAnnotationValueTypeMask) != kDexAnnotationAnnotation) { 1303 return nullptr; 1304 } 1305 annotation = SearchEncodedAnnotation(annotation, method->GetName()); 1306 if (annotation == nullptr) { 1307 return nullptr; 1308 } 1309 AnnotationValue annotation_value; 1310 StackHandleScope<2> hs(Thread::Current()); 1311 Handle<mirror::Class> h_klass(hs.NewHandle(klass)); 1312 size_t pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize(); 1313 Handle<mirror::Class> return_type(hs.NewHandle( 1314 method->GetReturnType(true /* resolve */, pointer_size))); 1315 if (!ProcessAnnotationValue(h_klass, &annotation, &annotation_value, return_type, kAllObjects)) { 1316 return nullptr; 1317 } 1318 return annotation_value.value_.GetL(); 1319 } 1320 1321 mirror::Object* DexFile::GetAnnotationForMethod(ArtMethod* method, 1322 Handle<mirror::Class> annotation_class) const { 1323 const AnnotationSetItem* annotation_set = FindAnnotationSetForMethod(method); 1324 if (annotation_set == nullptr) { 1325 return nullptr; 1326 } 1327 StackHandleScope<1> hs(Thread::Current()); 1328 Handle<mirror::Class> method_class(hs.NewHandle(method->GetDeclaringClass())); 1329 return GetAnnotationObjectFromAnnotationSet(method_class, annotation_set, 1330 kDexVisibilityRuntime, annotation_class); 1331 } 1332 1333 mirror::ObjectArray<mirror::Object>* DexFile::GetAnnotationsForMethod(ArtMethod* method) const { 1334 const AnnotationSetItem* annotation_set = FindAnnotationSetForMethod(method); 1335 StackHandleScope<1> hs(Thread::Current()); 1336 Handle<mirror::Class> method_class(hs.NewHandle(method->GetDeclaringClass())); 1337 return ProcessAnnotationSet(method_class, annotation_set, kDexVisibilityRuntime); 1338 } 1339 1340 mirror::ObjectArray<mirror::Class>* DexFile::GetExceptionTypesForMethod(ArtMethod* method) const { 1341 const AnnotationSetItem* annotation_set = FindAnnotationSetForMethod(method); 1342 if (annotation_set == nullptr) { 1343 return nullptr; 1344 } 1345 StackHandleScope<1> hs(Thread::Current()); 1346 Handle<mirror::Class> method_class(hs.NewHandle(method->GetDeclaringClass())); 1347 return GetThrowsValue(method_class, annotation_set); 1348 } 1349 1350 mirror::ObjectArray<mirror::Object>* DexFile::GetParameterAnnotations(ArtMethod* method) const { 1351 const ParameterAnnotationsItem* parameter_annotations = FindAnnotationsItemForMethod(method); 1352 if (parameter_annotations == nullptr) { 1353 return nullptr; 1354 } 1355 const AnnotationSetRefList* set_ref_list = 1356 GetParameterAnnotationSetRefList(parameter_annotations); 1357 if (set_ref_list == nullptr) { 1358 return nullptr; 1359 } 1360 uint32_t size = set_ref_list->size_; 1361 StackHandleScope<1> hs(Thread::Current()); 1362 Handle<mirror::Class> method_class(hs.NewHandle(method->GetDeclaringClass())); 1363 return ProcessAnnotationSetRefList(method_class, set_ref_list, size); 1364 } 1365 1366 mirror::ObjectArray<mirror::String>* DexFile::GetSignatureAnnotationForMethod(ArtMethod* method) 1367 const { 1368 const AnnotationSetItem* annotation_set = FindAnnotationSetForMethod(method); 1369 if (annotation_set == nullptr) { 1370 return nullptr; 1371 } 1372 StackHandleScope<1> hs(Thread::Current()); 1373 Handle<mirror::Class> method_class(hs.NewHandle(method->GetDeclaringClass())); 1374 return GetSignatureValue(method_class, annotation_set); 1375 } 1376 1377 bool DexFile::IsMethodAnnotationPresent(ArtMethod* method, Handle<mirror::Class> annotation_class) 1378 const { 1379 const AnnotationSetItem* annotation_set = FindAnnotationSetForMethod(method); 1380 if (annotation_set == nullptr) { 1381 return false; 1382 } 1383 StackHandleScope<1> hs(Thread::Current()); 1384 Handle<mirror::Class> method_class(hs.NewHandle(method->GetDeclaringClass())); 1385 const AnnotationItem* annotation_item = GetAnnotationItemFromAnnotationSet( 1386 method_class, annotation_set, kDexVisibilityRuntime, annotation_class); 1387 return annotation_item != nullptr; 1388 } 1389 1390 const DexFile::AnnotationSetItem* DexFile::FindAnnotationSetForClass(Handle<mirror::Class> klass) 1391 const { 1392 const AnnotationsDirectoryItem* annotations_dir = GetAnnotationsDirectory(*klass->GetClassDef()); 1393 if (annotations_dir == nullptr) { 1394 return nullptr; 1395 } 1396 return GetClassAnnotationSet(annotations_dir); 1397 } 1398 1399 mirror::Object* DexFile::GetAnnotationForClass(Handle<mirror::Class> klass, 1400 Handle<mirror::Class> annotation_class) const { 1401 const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(klass); 1402 if (annotation_set == nullptr) { 1403 return nullptr; 1404 } 1405 return GetAnnotationObjectFromAnnotationSet(klass, annotation_set, kDexVisibilityRuntime, 1406 annotation_class); 1407 } 1408 1409 mirror::ObjectArray<mirror::Object>* DexFile::GetAnnotationsForClass(Handle<mirror::Class> klass) 1410 const { 1411 const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(klass); 1412 return ProcessAnnotationSet(klass, annotation_set, kDexVisibilityRuntime); 1413 } 1414 1415 mirror::ObjectArray<mirror::Class>* DexFile::GetDeclaredClasses(Handle<mirror::Class> klass) const { 1416 const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(klass); 1417 if (annotation_set == nullptr) { 1418 return nullptr; 1419 } 1420 const AnnotationItem* annotation_item = SearchAnnotationSet( 1421 annotation_set, "Ldalvik/annotation/MemberClasses;", kDexVisibilitySystem); 1422 if (annotation_item == nullptr) { 1423 return nullptr; 1424 } 1425 StackHandleScope<1> hs(Thread::Current()); 1426 mirror::Class* class_class = mirror::Class::GetJavaLangClass(); 1427 Handle<mirror::Class> class_array_class(hs.NewHandle( 1428 Runtime::Current()->GetClassLinker()->FindArrayClass(hs.Self(), &class_class))); 1429 if (class_array_class.Get() == nullptr) { 1430 return nullptr; 1431 } 1432 mirror::Object* obj = GetAnnotationValue( 1433 klass, annotation_item, "value", class_array_class, kDexAnnotationArray); 1434 if (obj == nullptr) { 1435 return nullptr; 1436 } 1437 return obj->AsObjectArray<mirror::Class>(); 1438 } 1439 1440 mirror::Class* DexFile::GetDeclaringClass(Handle<mirror::Class> klass) const { 1441 const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(klass); 1442 if (annotation_set == nullptr) { 1443 return nullptr; 1444 } 1445 const AnnotationItem* annotation_item = SearchAnnotationSet( 1446 annotation_set, "Ldalvik/annotation/EnclosingClass;", kDexVisibilitySystem); 1447 if (annotation_item == nullptr) { 1448 return nullptr; 1449 } 1450 mirror::Object* obj = GetAnnotationValue(klass, 1451 annotation_item, 1452 "value", 1453 ScopedNullHandle<mirror::Class>(), 1454 kDexAnnotationType); 1455 if (obj == nullptr) { 1456 return nullptr; 1457 } 1458 return obj->AsClass(); 1459 } 1460 1461 mirror::Class* DexFile::GetEnclosingClass(Handle<mirror::Class> klass) const { 1462 mirror::Class* declaring_class = GetDeclaringClass(klass); 1463 if (declaring_class != nullptr) { 1464 return declaring_class; 1465 } 1466 const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(klass); 1467 if (annotation_set == nullptr) { 1468 return nullptr; 1469 } 1470 const AnnotationItem* annotation_item = SearchAnnotationSet( 1471 annotation_set, "Ldalvik/annotation/EnclosingMethod;", kDexVisibilitySystem); 1472 if (annotation_item == nullptr) { 1473 return nullptr; 1474 } 1475 const uint8_t* annotation = SearchEncodedAnnotation(annotation_item->annotation_, "value"); 1476 if (annotation == nullptr) { 1477 return nullptr; 1478 } 1479 AnnotationValue annotation_value; 1480 if (!ProcessAnnotationValue(klass, 1481 &annotation, 1482 &annotation_value, 1483 ScopedNullHandle<mirror::Class>(), 1484 kAllRaw)) { 1485 return nullptr; 1486 } 1487 if (annotation_value.type_ != kDexAnnotationMethod) { 1488 return nullptr; 1489 } 1490 StackHandleScope<2> hs(Thread::Current()); 1491 Handle<mirror::DexCache> dex_cache(hs.NewHandle(klass->GetDexCache())); 1492 Handle<mirror::ClassLoader> class_loader(hs.NewHandle(klass->GetClassLoader())); 1493 ArtMethod* method = Runtime::Current()->GetClassLinker()->ResolveMethodWithoutInvokeType( 1494 klass->GetDexFile(), annotation_value.value_.GetI(), dex_cache, class_loader); 1495 if (method == nullptr) { 1496 return nullptr; 1497 } 1498 return method->GetDeclaringClass(); 1499 } 1500 1501 mirror::Object* DexFile::GetEnclosingMethod(Handle<mirror::Class> klass) const { 1502 const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(klass); 1503 if (annotation_set == nullptr) { 1504 return nullptr; 1505 } 1506 const AnnotationItem* annotation_item = SearchAnnotationSet( 1507 annotation_set, "Ldalvik/annotation/EnclosingMethod;", kDexVisibilitySystem); 1508 if (annotation_item == nullptr) { 1509 return nullptr; 1510 } 1511 return GetAnnotationValue( 1512 klass, annotation_item, "value", ScopedNullHandle<mirror::Class>(), kDexAnnotationMethod); 1513 } 1514 1515 bool DexFile::GetInnerClass(Handle<mirror::Class> klass, mirror::String** name) const { 1516 const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(klass); 1517 if (annotation_set == nullptr) { 1518 return false; 1519 } 1520 const AnnotationItem* annotation_item = SearchAnnotationSet( 1521 annotation_set, "Ldalvik/annotation/InnerClass;", kDexVisibilitySystem); 1522 if (annotation_item == nullptr) { 1523 return false; 1524 } 1525 const uint8_t* annotation = SearchEncodedAnnotation(annotation_item->annotation_, "name"); 1526 if (annotation == nullptr) { 1527 return false; 1528 } 1529 AnnotationValue annotation_value; 1530 if (!ProcessAnnotationValue(klass, 1531 &annotation, 1532 &annotation_value, 1533 ScopedNullHandle<mirror::Class>(), 1534 kAllObjects)) { 1535 return false; 1536 } 1537 if (annotation_value.type_ != kDexAnnotationNull && 1538 annotation_value.type_ != kDexAnnotationString) { 1539 return false; 1540 } 1541 *name = down_cast<mirror::String*>(annotation_value.value_.GetL()); 1542 return true; 1543 } 1544 1545 bool DexFile::GetInnerClassFlags(Handle<mirror::Class> klass, uint32_t* flags) const { 1546 const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(klass); 1547 if (annotation_set == nullptr) { 1548 return false; 1549 } 1550 const AnnotationItem* annotation_item = SearchAnnotationSet( 1551 annotation_set, "Ldalvik/annotation/InnerClass;", kDexVisibilitySystem); 1552 if (annotation_item == nullptr) { 1553 return false; 1554 } 1555 const uint8_t* annotation = SearchEncodedAnnotation(annotation_item->annotation_, "accessFlags"); 1556 if (annotation == nullptr) { 1557 return false; 1558 } 1559 AnnotationValue annotation_value; 1560 if (!ProcessAnnotationValue(klass, 1561 &annotation, 1562 &annotation_value, 1563 ScopedNullHandle<mirror::Class>(), 1564 kAllRaw)) { 1565 return false; 1566 } 1567 if (annotation_value.type_ != kDexAnnotationInt) { 1568 return false; 1569 } 1570 *flags = annotation_value.value_.GetI(); 1571 return true; 1572 } 1573 1574 mirror::ObjectArray<mirror::String>* DexFile::GetSignatureAnnotationForClass( 1575 Handle<mirror::Class> klass) const { 1576 const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(klass); 1577 if (annotation_set == nullptr) { 1578 return nullptr; 1579 } 1580 return GetSignatureValue(klass, annotation_set); 1581 } 1582 1583 bool DexFile::IsClassAnnotationPresent(Handle<mirror::Class> klass, 1584 Handle<mirror::Class> annotation_class) const { 1585 const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(klass); 1586 if (annotation_set == nullptr) { 1587 return false; 1588 } 1589 const AnnotationItem* annotation_item = GetAnnotationItemFromAnnotationSet( 1590 klass, annotation_set, kDexVisibilityRuntime, annotation_class); 1591 return annotation_item != nullptr; 1592 } 1593 1594 mirror::Object* DexFile::CreateAnnotationMember(Handle<mirror::Class> klass, 1595 Handle<mirror::Class> annotation_class, const uint8_t** annotation) const { 1596 Thread* self = Thread::Current(); 1597 ScopedObjectAccessUnchecked soa(self); 1598 StackHandleScope<5> hs(self); 1599 uint32_t element_name_index = DecodeUnsignedLeb128(annotation); 1600 const char* name = StringDataByIdx(element_name_index); 1601 Handle<mirror::String> string_name( 1602 hs.NewHandle(mirror::String::AllocFromModifiedUtf8(self, name))); 1603 1604 ArtMethod* annotation_method = 1605 annotation_class->FindDeclaredVirtualMethodByName(name, sizeof(void*)); 1606 if (annotation_method == nullptr) { 1607 return nullptr; 1608 } 1609 size_t pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize(); 1610 Handle<mirror::Class> method_return(hs.NewHandle( 1611 annotation_method->GetReturnType(true /* resolve */, pointer_size))); 1612 1613 AnnotationValue annotation_value; 1614 if (!ProcessAnnotationValue(klass, annotation, &annotation_value, method_return, kAllObjects)) { 1615 return nullptr; 1616 } 1617 Handle<mirror::Object> value_object(hs.NewHandle(annotation_value.value_.GetL())); 1618 1619 mirror::Class* annotation_member_class = 1620 WellKnownClasses::ToClass(WellKnownClasses::libcore_reflect_AnnotationMember); 1621 Handle<mirror::Object> new_member(hs.NewHandle(annotation_member_class->AllocObject(self))); 1622 Handle<mirror::Method> method_object( 1623 hs.NewHandle(mirror::Method::CreateFromArtMethod(self, annotation_method))); 1624 1625 if (new_member.Get() == nullptr || string_name.Get() == nullptr || 1626 method_object.Get() == nullptr || method_return.Get() == nullptr) { 1627 LOG(ERROR) << StringPrintf("Failed creating annotation element (m=%p n=%p a=%p r=%p", 1628 new_member.Get(), string_name.Get(), method_object.Get(), method_return.Get()); 1629 return nullptr; 1630 } 1631 1632 JValue result; 1633 ArtMethod* annotation_member_init = 1634 soa.DecodeMethod(WellKnownClasses::libcore_reflect_AnnotationMember_init); 1635 uint32_t args[5] = { static_cast<uint32_t>(reinterpret_cast<uintptr_t>(new_member.Get())), 1636 static_cast<uint32_t>(reinterpret_cast<uintptr_t>(string_name.Get())), 1637 static_cast<uint32_t>(reinterpret_cast<uintptr_t>(value_object.Get())), 1638 static_cast<uint32_t>(reinterpret_cast<uintptr_t>(method_return.Get())), 1639 static_cast<uint32_t>(reinterpret_cast<uintptr_t>(method_object.Get())) 1640 }; 1641 annotation_member_init->Invoke(self, args, sizeof(args), &result, "VLLLL"); 1642 if (self->IsExceptionPending()) { 1643 LOG(INFO) << "Exception in AnnotationMember.<init>"; 1644 return nullptr; 1645 } 1646 1647 return new_member.Get(); 1648 } 1649 1650 const DexFile::AnnotationItem* DexFile::GetAnnotationItemFromAnnotationSet( 1651 Handle<mirror::Class> klass, const AnnotationSetItem* annotation_set, uint32_t visibility, 1652 Handle<mirror::Class> annotation_class) const { 1653 for (uint32_t i = 0; i < annotation_set->size_; ++i) { 1654 const AnnotationItem* annotation_item = GetAnnotationItem(annotation_set, i); 1655 if (!IsVisibilityCompatible(annotation_item->visibility_, visibility)) { 1656 continue; 1657 } 1658 const uint8_t* annotation = annotation_item->annotation_; 1659 uint32_t type_index = DecodeUnsignedLeb128(&annotation); 1660 mirror::Class* resolved_class = Runtime::Current()->GetClassLinker()->ResolveType( 1661 klass->GetDexFile(), type_index, klass.Get()); 1662 if (resolved_class == nullptr) { 1663 std::string temp; 1664 LOG(WARNING) << StringPrintf("Unable to resolve %s annotation class %d", 1665 klass->GetDescriptor(&temp), type_index); 1666 CHECK(Thread::Current()->IsExceptionPending()); 1667 Thread::Current()->ClearException(); 1668 continue; 1669 } 1670 if (resolved_class == annotation_class.Get()) { 1671 return annotation_item; 1672 } 1673 } 1674 1675 return nullptr; 1676 } 1677 1678 mirror::Object* DexFile::GetAnnotationObjectFromAnnotationSet(Handle<mirror::Class> klass, 1679 const AnnotationSetItem* annotation_set, uint32_t visibility, 1680 Handle<mirror::Class> annotation_class) const { 1681 const AnnotationItem* annotation_item = 1682 GetAnnotationItemFromAnnotationSet(klass, annotation_set, visibility, annotation_class); 1683 if (annotation_item == nullptr) { 1684 return nullptr; 1685 } 1686 const uint8_t* annotation = annotation_item->annotation_; 1687 return ProcessEncodedAnnotation(klass, &annotation); 1688 } 1689 1690 mirror::Object* DexFile::GetAnnotationValue(Handle<mirror::Class> klass, 1691 const AnnotationItem* annotation_item, const char* annotation_name, 1692 Handle<mirror::Class> array_class, uint32_t expected_type) const { 1693 const uint8_t* annotation = 1694 SearchEncodedAnnotation(annotation_item->annotation_, annotation_name); 1695 if (annotation == nullptr) { 1696 return nullptr; 1697 } 1698 AnnotationValue annotation_value; 1699 if (!ProcessAnnotationValue(klass, &annotation, &annotation_value, array_class, kAllObjects)) { 1700 return nullptr; 1701 } 1702 if (annotation_value.type_ != expected_type) { 1703 return nullptr; 1704 } 1705 return annotation_value.value_.GetL(); 1706 } 1707 1708 mirror::ObjectArray<mirror::String>* DexFile::GetSignatureValue(Handle<mirror::Class> klass, 1709 const AnnotationSetItem* annotation_set) const { 1710 StackHandleScope<1> hs(Thread::Current()); 1711 const AnnotationItem* annotation_item = 1712 SearchAnnotationSet(annotation_set, "Ldalvik/annotation/Signature;", kDexVisibilitySystem); 1713 if (annotation_item == nullptr) { 1714 return nullptr; 1715 } 1716 mirror::Class* string_class = mirror::String::GetJavaLangString(); 1717 Handle<mirror::Class> string_array_class(hs.NewHandle( 1718 Runtime::Current()->GetClassLinker()->FindArrayClass(Thread::Current(), &string_class))); 1719 if (string_array_class.Get() == nullptr) { 1720 return nullptr; 1721 } 1722 mirror::Object* obj = 1723 GetAnnotationValue(klass, annotation_item, "value", string_array_class, kDexAnnotationArray); 1724 if (obj == nullptr) { 1725 return nullptr; 1726 } 1727 return obj->AsObjectArray<mirror::String>(); 1728 } 1729 1730 mirror::ObjectArray<mirror::Class>* DexFile::GetThrowsValue(Handle<mirror::Class> klass, 1731 const AnnotationSetItem* annotation_set) const { 1732 StackHandleScope<1> hs(Thread::Current()); 1733 const AnnotationItem* annotation_item = 1734 SearchAnnotationSet(annotation_set, "Ldalvik/annotation/Throws;", kDexVisibilitySystem); 1735 if (annotation_item == nullptr) { 1736 return nullptr; 1737 } 1738 mirror::Class* class_class = mirror::Class::GetJavaLangClass(); 1739 Handle<mirror::Class> class_array_class(hs.NewHandle( 1740 Runtime::Current()->GetClassLinker()->FindArrayClass(Thread::Current(), &class_class))); 1741 if (class_array_class.Get() == nullptr) { 1742 return nullptr; 1743 } 1744 mirror::Object* obj = 1745 GetAnnotationValue(klass, annotation_item, "value", class_array_class, kDexAnnotationArray); 1746 if (obj == nullptr) { 1747 return nullptr; 1748 } 1749 return obj->AsObjectArray<mirror::Class>(); 1750 } 1751 1752 mirror::ObjectArray<mirror::Object>* DexFile::ProcessAnnotationSet(Handle<mirror::Class> klass, 1753 const AnnotationSetItem* annotation_set, uint32_t visibility) const { 1754 Thread* self = Thread::Current(); 1755 ScopedObjectAccessUnchecked soa(self); 1756 StackHandleScope<2> hs(self); 1757 Handle<mirror::Class> annotation_array_class(hs.NewHandle( 1758 soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_annotation_Annotation__array))); 1759 if (annotation_set == nullptr) { 1760 return mirror::ObjectArray<mirror::Object>::Alloc(self, annotation_array_class.Get(), 0); 1761 } 1762 1763 uint32_t size = annotation_set->size_; 1764 Handle<mirror::ObjectArray<mirror::Object>> result(hs.NewHandle( 1765 mirror::ObjectArray<mirror::Object>::Alloc(self, annotation_array_class.Get(), size))); 1766 if (result.Get() == nullptr) { 1767 return nullptr; 1768 } 1769 1770 uint32_t dest_index = 0; 1771 for (uint32_t i = 0; i < size; ++i) { 1772 const AnnotationItem* annotation_item = GetAnnotationItem(annotation_set, i); 1773 // Note that we do not use IsVisibilityCompatible here because older code 1774 // was correct for this case. 1775 if (annotation_item->visibility_ != visibility) { 1776 continue; 1777 } 1778 const uint8_t* annotation = annotation_item->annotation_; 1779 mirror::Object* annotation_obj = ProcessEncodedAnnotation(klass, &annotation); 1780 if (annotation_obj != nullptr) { 1781 result->SetWithoutChecks<false>(dest_index, annotation_obj); 1782 ++dest_index; 1783 } else if (self->IsExceptionPending()) { 1784 return nullptr; 1785 } 1786 } 1787 1788 if (dest_index == size) { 1789 return result.Get(); 1790 } 1791 1792 mirror::ObjectArray<mirror::Object>* trimmed_result = 1793 mirror::ObjectArray<mirror::Object>::Alloc(self, annotation_array_class.Get(), dest_index); 1794 if (trimmed_result == nullptr) { 1795 return nullptr; 1796 } 1797 1798 for (uint32_t i = 0; i < dest_index; ++i) { 1799 mirror::Object* obj = result->GetWithoutChecks(i); 1800 trimmed_result->SetWithoutChecks<false>(i, obj); 1801 } 1802 1803 return trimmed_result; 1804 } 1805 1806 mirror::ObjectArray<mirror::Object>* DexFile::ProcessAnnotationSetRefList( 1807 Handle<mirror::Class> klass, const AnnotationSetRefList* set_ref_list, uint32_t size) const { 1808 Thread* self = Thread::Current(); 1809 ScopedObjectAccessUnchecked soa(self); 1810 StackHandleScope<1> hs(self); 1811 mirror::Class* annotation_array_class = 1812 soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_annotation_Annotation__array); 1813 mirror::Class* annotation_array_array_class = 1814 Runtime::Current()->GetClassLinker()->FindArrayClass(self, &annotation_array_class); 1815 if (annotation_array_array_class == nullptr) { 1816 return nullptr; 1817 } 1818 Handle<mirror::ObjectArray<mirror::Object>> annotation_array_array(hs.NewHandle( 1819 mirror::ObjectArray<mirror::Object>::Alloc(self, annotation_array_array_class, size))); 1820 if (annotation_array_array.Get() == nullptr) { 1821 LOG(ERROR) << "Annotation set ref array allocation failed"; 1822 return nullptr; 1823 } 1824 for (uint32_t index = 0; index < size; ++index) { 1825 const AnnotationSetRefItem* set_ref_item = &set_ref_list->list_[index]; 1826 const AnnotationSetItem* set_item = GetSetRefItemItem(set_ref_item); 1827 mirror::Object* annotation_set = ProcessAnnotationSet(klass, set_item, kDexVisibilityRuntime); 1828 if (annotation_set == nullptr) { 1829 return nullptr; 1830 } 1831 annotation_array_array->SetWithoutChecks<false>(index, annotation_set); 1832 } 1833 return annotation_array_array.Get(); 1834 } 1835 1836 bool DexFile::ProcessAnnotationValue(Handle<mirror::Class> klass, const uint8_t** annotation_ptr, 1837 AnnotationValue* annotation_value, Handle<mirror::Class> array_class, 1838 DexFile::AnnotationResultStyle result_style) const { 1839 Thread* self = Thread::Current(); 1840 mirror::Object* element_object = nullptr; 1841 bool set_object = false; 1842 Primitive::Type primitive_type = Primitive::kPrimVoid; 1843 const uint8_t* annotation = *annotation_ptr; 1844 uint8_t header_byte = *(annotation++); 1845 uint8_t value_type = header_byte & kDexAnnotationValueTypeMask; 1846 uint8_t value_arg = header_byte >> kDexAnnotationValueArgShift; 1847 int32_t width = value_arg + 1; 1848 annotation_value->type_ = value_type; 1849 1850 switch (value_type) { 1851 case kDexAnnotationByte: 1852 annotation_value->value_.SetB(static_cast<int8_t>(ReadSignedInt(annotation, value_arg))); 1853 primitive_type = Primitive::kPrimByte; 1854 break; 1855 case kDexAnnotationShort: 1856 annotation_value->value_.SetS(static_cast<int16_t>(ReadSignedInt(annotation, value_arg))); 1857 primitive_type = Primitive::kPrimShort; 1858 break; 1859 case kDexAnnotationChar: 1860 annotation_value->value_.SetC(static_cast<uint16_t>(ReadUnsignedInt(annotation, value_arg, 1861 false))); 1862 primitive_type = Primitive::kPrimChar; 1863 break; 1864 case kDexAnnotationInt: 1865 annotation_value->value_.SetI(ReadSignedInt(annotation, value_arg)); 1866 primitive_type = Primitive::kPrimInt; 1867 break; 1868 case kDexAnnotationLong: 1869 annotation_value->value_.SetJ(ReadSignedLong(annotation, value_arg)); 1870 primitive_type = Primitive::kPrimLong; 1871 break; 1872 case kDexAnnotationFloat: 1873 annotation_value->value_.SetI(ReadUnsignedInt(annotation, value_arg, true)); 1874 primitive_type = Primitive::kPrimFloat; 1875 break; 1876 case kDexAnnotationDouble: 1877 annotation_value->value_.SetJ(ReadUnsignedLong(annotation, value_arg, true)); 1878 primitive_type = Primitive::kPrimDouble; 1879 break; 1880 case kDexAnnotationBoolean: 1881 annotation_value->value_.SetZ(value_arg != 0); 1882 primitive_type = Primitive::kPrimBoolean; 1883 width = 0; 1884 break; 1885 case kDexAnnotationString: { 1886 uint32_t index = ReadUnsignedInt(annotation, value_arg, false); 1887 if (result_style == kAllRaw) { 1888 annotation_value->value_.SetI(index); 1889 } else { 1890 StackHandleScope<1> hs(self); 1891 Handle<mirror::DexCache> dex_cache(hs.NewHandle(klass->GetDexCache())); 1892 element_object = Runtime::Current()->GetClassLinker()->ResolveString( 1893 klass->GetDexFile(), index, dex_cache); 1894 set_object = true; 1895 if (element_object == nullptr) { 1896 return false; 1897 } 1898 } 1899 break; 1900 } 1901 case kDexAnnotationType: { 1902 uint32_t index = ReadUnsignedInt(annotation, value_arg, false); 1903 if (result_style == kAllRaw) { 1904 annotation_value->value_.SetI(index); 1905 } else { 1906 element_object = Runtime::Current()->GetClassLinker()->ResolveType( 1907 klass->GetDexFile(), index, klass.Get()); 1908 set_object = true; 1909 if (element_object == nullptr) { 1910 CHECK(self->IsExceptionPending()); 1911 if (result_style == kAllObjects) { 1912 const char* msg = StringByTypeIdx(index); 1913 self->ThrowNewWrappedException("Ljava/lang/TypeNotPresentException;", msg); 1914 element_object = self->GetException(); 1915 self->ClearException(); 1916 } else { 1917 return false; 1918 } 1919 } 1920 } 1921 break; 1922 } 1923 case kDexAnnotationMethod: { 1924 uint32_t index = ReadUnsignedInt(annotation, value_arg, false); 1925 if (result_style == kAllRaw) { 1926 annotation_value->value_.SetI(index); 1927 } else { 1928 StackHandleScope<2> hs(self); 1929 Handle<mirror::DexCache> dex_cache(hs.NewHandle(klass->GetDexCache())); 1930 Handle<mirror::ClassLoader> class_loader(hs.NewHandle(klass->GetClassLoader())); 1931 ArtMethod* method = Runtime::Current()->GetClassLinker()->ResolveMethodWithoutInvokeType( 1932 klass->GetDexFile(), index, dex_cache, class_loader); 1933 if (method == nullptr) { 1934 return false; 1935 } 1936 set_object = true; 1937 if (method->IsConstructor()) { 1938 element_object = mirror::Constructor::CreateFromArtMethod(self, method); 1939 } else { 1940 element_object = mirror::Method::CreateFromArtMethod(self, method); 1941 } 1942 if (element_object == nullptr) { 1943 return false; 1944 } 1945 } 1946 break; 1947 } 1948 case kDexAnnotationField: { 1949 uint32_t index = ReadUnsignedInt(annotation, value_arg, false); 1950 if (result_style == kAllRaw) { 1951 annotation_value->value_.SetI(index); 1952 } else { 1953 StackHandleScope<2> hs(self); 1954 Handle<mirror::DexCache> dex_cache(hs.NewHandle(klass->GetDexCache())); 1955 Handle<mirror::ClassLoader> class_loader(hs.NewHandle(klass->GetClassLoader())); 1956 ArtField* field = Runtime::Current()->GetClassLinker()->ResolveFieldJLS( 1957 klass->GetDexFile(), index, dex_cache, class_loader); 1958 if (field == nullptr) { 1959 return false; 1960 } 1961 set_object = true; 1962 element_object = mirror::Field::CreateFromArtField(self, field, true); 1963 if (element_object == nullptr) { 1964 return false; 1965 } 1966 } 1967 break; 1968 } 1969 case kDexAnnotationEnum: { 1970 uint32_t index = ReadUnsignedInt(annotation, value_arg, false); 1971 if (result_style == kAllRaw) { 1972 annotation_value->value_.SetI(index); 1973 } else { 1974 StackHandleScope<3> hs(self); 1975 Handle<mirror::DexCache> dex_cache(hs.NewHandle(klass->GetDexCache())); 1976 Handle<mirror::ClassLoader> class_loader(hs.NewHandle(klass->GetClassLoader())); 1977 ArtField* enum_field = Runtime::Current()->GetClassLinker()->ResolveField( 1978 klass->GetDexFile(), index, dex_cache, class_loader, true); 1979 if (enum_field == nullptr) { 1980 return false; 1981 } else { 1982 Handle<mirror::Class> field_class(hs.NewHandle(enum_field->GetDeclaringClass())); 1983 Runtime::Current()->GetClassLinker()->EnsureInitialized(self, field_class, true, true); 1984 element_object = enum_field->GetObject(field_class.Get()); 1985 set_object = true; 1986 } 1987 } 1988 break; 1989 } 1990 case kDexAnnotationArray: 1991 if (result_style == kAllRaw || array_class.Get() == nullptr) { 1992 return false; 1993 } else { 1994 ScopedObjectAccessUnchecked soa(self); 1995 StackHandleScope<2> hs(self); 1996 uint32_t size = DecodeUnsignedLeb128(&annotation); 1997 Handle<mirror::Class> component_type(hs.NewHandle(array_class->GetComponentType())); 1998 Handle<mirror::Array> new_array(hs.NewHandle(mirror::Array::Alloc<true>( 1999 self, array_class.Get(), size, array_class->GetComponentSizeShift(), 2000 Runtime::Current()->GetHeap()->GetCurrentAllocator()))); 2001 if (new_array.Get() == nullptr) { 2002 LOG(ERROR) << "Annotation element array allocation failed with size " << size; 2003 return false; 2004 } 2005 AnnotationValue new_annotation_value; 2006 for (uint32_t i = 0; i < size; ++i) { 2007 if (!ProcessAnnotationValue(klass, &annotation, &new_annotation_value, component_type, 2008 kPrimitivesOrObjects)) { 2009 return false; 2010 } 2011 if (!component_type->IsPrimitive()) { 2012 mirror::Object* obj = new_annotation_value.value_.GetL(); 2013 new_array->AsObjectArray<mirror::Object>()->SetWithoutChecks<false>(i, obj); 2014 } else { 2015 switch (new_annotation_value.type_) { 2016 case kDexAnnotationByte: 2017 new_array->AsByteArray()->SetWithoutChecks<false>( 2018 i, new_annotation_value.value_.GetB()); 2019 break; 2020 case kDexAnnotationShort: 2021 new_array->AsShortArray()->SetWithoutChecks<false>( 2022 i, new_annotation_value.value_.GetS()); 2023 break; 2024 case kDexAnnotationChar: 2025 new_array->AsCharArray()->SetWithoutChecks<false>( 2026 i, new_annotation_value.value_.GetC()); 2027 break; 2028 case kDexAnnotationInt: 2029 new_array->AsIntArray()->SetWithoutChecks<false>( 2030 i, new_annotation_value.value_.GetI()); 2031 break; 2032 case kDexAnnotationLong: 2033 new_array->AsLongArray()->SetWithoutChecks<false>( 2034 i, new_annotation_value.value_.GetJ()); 2035 break; 2036 case kDexAnnotationFloat: 2037 new_array->AsFloatArray()->SetWithoutChecks<false>( 2038 i, new_annotation_value.value_.GetF()); 2039 break; 2040 case kDexAnnotationDouble: 2041 new_array->AsDoubleArray()->SetWithoutChecks<false>( 2042 i, new_annotation_value.value_.GetD()); 2043 break; 2044 case kDexAnnotationBoolean: 2045 new_array->AsBooleanArray()->SetWithoutChecks<false>( 2046 i, new_annotation_value.value_.GetZ()); 2047 break; 2048 default: 2049 LOG(FATAL) << "Found invalid annotation value type while building annotation array"; 2050 return false; 2051 } 2052 } 2053 } 2054 element_object = new_array.Get(); 2055 set_object = true; 2056 width = 0; 2057 } 2058 break; 2059 case kDexAnnotationAnnotation: 2060 if (result_style == kAllRaw) { 2061 return false; 2062 } 2063 element_object = ProcessEncodedAnnotation(klass, &annotation); 2064 if (element_object == nullptr) { 2065 return false; 2066 } 2067 set_object = true; 2068 width = 0; 2069 break; 2070 case kDexAnnotationNull: 2071 if (result_style == kAllRaw) { 2072 annotation_value->value_.SetI(0); 2073 } else { 2074 CHECK(element_object == nullptr); 2075 set_object = true; 2076 } 2077 width = 0; 2078 break; 2079 default: 2080 LOG(ERROR) << StringPrintf("Bad annotation element value type 0x%02x", value_type); 2081 return false; 2082 } 2083 2084 annotation += width; 2085 *annotation_ptr = annotation; 2086 2087 if (result_style == kAllObjects && primitive_type != Primitive::kPrimVoid) { 2088 element_object = BoxPrimitive(primitive_type, annotation_value->value_); 2089 set_object = true; 2090 } 2091 2092 if (set_object) { 2093 annotation_value->value_.SetL(element_object); 2094 } 2095 2096 return true; 2097 } 2098 2099 mirror::Object* DexFile::ProcessEncodedAnnotation(Handle<mirror::Class> klass, 2100 const uint8_t** annotation) const { 2101 uint32_t type_index = DecodeUnsignedLeb128(annotation); 2102 uint32_t size = DecodeUnsignedLeb128(annotation); 2103 2104 Thread* self = Thread::Current(); 2105 ScopedObjectAccessUnchecked soa(self); 2106 StackHandleScope<2> hs(self); 2107 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 2108 Handle<mirror::Class> annotation_class(hs.NewHandle( 2109 class_linker->ResolveType(klass->GetDexFile(), type_index, klass.Get()))); 2110 if (annotation_class.Get() == nullptr) { 2111 LOG(INFO) << "Unable to resolve " << PrettyClass(klass.Get()) << " annotation class " 2112 << type_index; 2113 DCHECK(Thread::Current()->IsExceptionPending()); 2114 Thread::Current()->ClearException(); 2115 return nullptr; 2116 } 2117 2118 mirror::Class* annotation_member_class = 2119 soa.Decode<mirror::Class*>(WellKnownClasses::libcore_reflect_AnnotationMember); 2120 mirror::Class* annotation_member_array_class = 2121 class_linker->FindArrayClass(self, &annotation_member_class); 2122 if (annotation_member_array_class == nullptr) { 2123 return nullptr; 2124 } 2125 mirror::ObjectArray<mirror::Object>* element_array = nullptr; 2126 if (size > 0) { 2127 element_array = 2128 mirror::ObjectArray<mirror::Object>::Alloc(self, annotation_member_array_class, size); 2129 if (element_array == nullptr) { 2130 LOG(ERROR) << "Failed to allocate annotation member array (" << size << " elements)"; 2131 return nullptr; 2132 } 2133 } 2134 2135 Handle<mirror::ObjectArray<mirror::Object>> h_element_array(hs.NewHandle(element_array)); 2136 for (uint32_t i = 0; i < size; ++i) { 2137 mirror::Object* new_member = CreateAnnotationMember(klass, annotation_class, annotation); 2138 if (new_member == nullptr) { 2139 return nullptr; 2140 } 2141 h_element_array->SetWithoutChecks<false>(i, new_member); 2142 } 2143 2144 JValue result; 2145 ArtMethod* create_annotation_method = 2146 soa.DecodeMethod(WellKnownClasses::libcore_reflect_AnnotationFactory_createAnnotation); 2147 uint32_t args[2] = { static_cast<uint32_t>(reinterpret_cast<uintptr_t>(annotation_class.Get())), 2148 static_cast<uint32_t>(reinterpret_cast<uintptr_t>(h_element_array.Get())) }; 2149 create_annotation_method->Invoke(self, args, sizeof(args), &result, "LLL"); 2150 if (self->IsExceptionPending()) { 2151 LOG(INFO) << "Exception in AnnotationFactory.createAnnotation"; 2152 return nullptr; 2153 } 2154 2155 return result.GetL(); 2156 } 2157 2158 const DexFile::AnnotationItem* DexFile::SearchAnnotationSet(const AnnotationSetItem* annotation_set, 2159 const char* descriptor, uint32_t visibility) const { 2160 const AnnotationItem* result = nullptr; 2161 for (uint32_t i = 0; i < annotation_set->size_; ++i) { 2162 const AnnotationItem* annotation_item = GetAnnotationItem(annotation_set, i); 2163 if (!IsVisibilityCompatible(annotation_item->visibility_, visibility)) { 2164 continue; 2165 } 2166 const uint8_t* annotation = annotation_item->annotation_; 2167 uint32_t type_index = DecodeUnsignedLeb128(&annotation); 2168 2169 if (strcmp(descriptor, StringByTypeIdx(type_index)) == 0) { 2170 result = annotation_item; 2171 break; 2172 } 2173 } 2174 return result; 2175 } 2176 2177 const uint8_t* DexFile::SearchEncodedAnnotation(const uint8_t* annotation, const char* name) const { 2178 DecodeUnsignedLeb128(&annotation); // unused type_index 2179 uint32_t size = DecodeUnsignedLeb128(&annotation); 2180 2181 while (size != 0) { 2182 uint32_t element_name_index = DecodeUnsignedLeb128(&annotation); 2183 const char* element_name = GetStringData(GetStringId(element_name_index)); 2184 if (strcmp(name, element_name) == 0) { 2185 return annotation; 2186 } 2187 SkipAnnotationValue(&annotation); 2188 size--; 2189 } 2190 return nullptr; 2191 } 2192 2193 bool DexFile::SkipAnnotationValue(const uint8_t** annotation_ptr) const { 2194 const uint8_t* annotation = *annotation_ptr; 2195 uint8_t header_byte = *(annotation++); 2196 uint8_t value_type = header_byte & kDexAnnotationValueTypeMask; 2197 uint8_t value_arg = header_byte >> kDexAnnotationValueArgShift; 2198 int32_t width = value_arg + 1; 2199 2200 switch (value_type) { 2201 case kDexAnnotationByte: 2202 case kDexAnnotationShort: 2203 case kDexAnnotationChar: 2204 case kDexAnnotationInt: 2205 case kDexAnnotationLong: 2206 case kDexAnnotationFloat: 2207 case kDexAnnotationDouble: 2208 case kDexAnnotationString: 2209 case kDexAnnotationType: 2210 case kDexAnnotationMethod: 2211 case kDexAnnotationField: 2212 case kDexAnnotationEnum: 2213 break; 2214 case kDexAnnotationArray: 2215 { 2216 uint32_t size = DecodeUnsignedLeb128(&annotation); 2217 while (size--) { 2218 if (!SkipAnnotationValue(&annotation)) { 2219 return false; 2220 } 2221 } 2222 width = 0; 2223 break; 2224 } 2225 case kDexAnnotationAnnotation: 2226 { 2227 DecodeUnsignedLeb128(&annotation); // unused type_index 2228 uint32_t size = DecodeUnsignedLeb128(&annotation); 2229 while (size--) { 2230 DecodeUnsignedLeb128(&annotation); // unused element_name_index 2231 if (!SkipAnnotationValue(&annotation)) { 2232 return false; 2233 } 2234 } 2235 width = 0; 2236 break; 2237 } 2238 case kDexAnnotationBoolean: 2239 case kDexAnnotationNull: 2240 width = 0; 2241 break; 2242 default: 2243 LOG(FATAL) << StringPrintf("Bad annotation element value byte 0x%02x", value_type); 2244 return false; 2245 } 2246 2247 annotation += width; 2248 *annotation_ptr = annotation; 2249 return true; 2250 } 2251 2252 std::ostream& operator<<(std::ostream& os, const DexFile& dex_file) { 2253 os << StringPrintf("[DexFile: %s dex-checksum=%08x location-checksum=%08x %p-%p]", 2254 dex_file.GetLocation().c_str(), 2255 dex_file.GetHeader().checksum_, dex_file.GetLocationChecksum(), 2256 dex_file.Begin(), dex_file.Begin() + dex_file.Size()); 2257 return os; 2258 } 2259 2260 std::string Signature::ToString() const { 2261 if (dex_file_ == nullptr) { 2262 CHECK(proto_id_ == nullptr); 2263 return "<no signature>"; 2264 } 2265 const DexFile::TypeList* params = dex_file_->GetProtoParameters(*proto_id_); 2266 std::string result; 2267 if (params == nullptr) { 2268 result += "()"; 2269 } else { 2270 result += "("; 2271 for (uint32_t i = 0; i < params->Size(); ++i) { 2272 result += dex_file_->StringByTypeIdx(params->GetTypeItem(i).type_idx_); 2273 } 2274 result += ")"; 2275 } 2276 result += dex_file_->StringByTypeIdx(proto_id_->return_type_idx_); 2277 return result; 2278 } 2279 2280 bool Signature::operator==(const StringPiece& rhs) const { 2281 if (dex_file_ == nullptr) { 2282 return false; 2283 } 2284 StringPiece tail(rhs); 2285 if (!tail.starts_with("(")) { 2286 return false; // Invalid signature 2287 } 2288 tail.remove_prefix(1); // "("; 2289 const DexFile::TypeList* params = dex_file_->GetProtoParameters(*proto_id_); 2290 if (params != nullptr) { 2291 for (uint32_t i = 0; i < params->Size(); ++i) { 2292 StringPiece param(dex_file_->StringByTypeIdx(params->GetTypeItem(i).type_idx_)); 2293 if (!tail.starts_with(param)) { 2294 return false; 2295 } 2296 tail.remove_prefix(param.length()); 2297 } 2298 } 2299 if (!tail.starts_with(")")) { 2300 return false; 2301 } 2302 tail.remove_prefix(1); // ")"; 2303 return tail == dex_file_->StringByTypeIdx(proto_id_->return_type_idx_); 2304 } 2305 2306 std::ostream& operator<<(std::ostream& os, const Signature& sig) { 2307 return os << sig.ToString(); 2308 } 2309 2310 // Decodes the header section from the class data bytes. 2311 void ClassDataItemIterator::ReadClassDataHeader() { 2312 CHECK(ptr_pos_ != nullptr); 2313 header_.static_fields_size_ = DecodeUnsignedLeb128(&ptr_pos_); 2314 header_.instance_fields_size_ = DecodeUnsignedLeb128(&ptr_pos_); 2315 header_.direct_methods_size_ = DecodeUnsignedLeb128(&ptr_pos_); 2316 header_.virtual_methods_size_ = DecodeUnsignedLeb128(&ptr_pos_); 2317 } 2318 2319 void ClassDataItemIterator::ReadClassDataField() { 2320 field_.field_idx_delta_ = DecodeUnsignedLeb128(&ptr_pos_); 2321 field_.access_flags_ = DecodeUnsignedLeb128(&ptr_pos_); 2322 // The user of the iterator is responsible for checking if there 2323 // are unordered or duplicate indexes. 2324 } 2325 2326 void ClassDataItemIterator::ReadClassDataMethod() { 2327 method_.method_idx_delta_ = DecodeUnsignedLeb128(&ptr_pos_); 2328 method_.access_flags_ = DecodeUnsignedLeb128(&ptr_pos_); 2329 method_.code_off_ = DecodeUnsignedLeb128(&ptr_pos_); 2330 if (last_idx_ != 0 && method_.method_idx_delta_ == 0) { 2331 LOG(WARNING) << "Duplicate method in " << dex_file_.GetLocation(); 2332 } 2333 } 2334 2335 EncodedStaticFieldValueIterator::EncodedStaticFieldValueIterator( 2336 const DexFile& dex_file, 2337 const DexFile::ClassDef& class_def) 2338 : EncodedStaticFieldValueIterator(dex_file, 2339 nullptr, 2340 nullptr, 2341 nullptr, 2342 class_def, 2343 -1, 2344 kByte) { 2345 } 2346 2347 EncodedStaticFieldValueIterator::EncodedStaticFieldValueIterator( 2348 const DexFile& dex_file, 2349 Handle<mirror::DexCache>* dex_cache, 2350 Handle<mirror::ClassLoader>* class_loader, 2351 ClassLinker* linker, 2352 const DexFile::ClassDef& class_def) 2353 : EncodedStaticFieldValueIterator(dex_file, 2354 dex_cache, class_loader, 2355 linker, 2356 class_def, 2357 -1, 2358 kByte) { 2359 DCHECK(dex_cache_ != nullptr); 2360 DCHECK(class_loader_ != nullptr); 2361 } 2362 2363 EncodedStaticFieldValueIterator::EncodedStaticFieldValueIterator( 2364 const DexFile& dex_file, 2365 Handle<mirror::DexCache>* dex_cache, 2366 Handle<mirror::ClassLoader>* class_loader, 2367 ClassLinker* linker, 2368 const DexFile::ClassDef& class_def, 2369 size_t pos, 2370 ValueType type) 2371 : dex_file_(dex_file), 2372 dex_cache_(dex_cache), 2373 class_loader_(class_loader), 2374 linker_(linker), 2375 array_size_(), 2376 pos_(pos), 2377 type_(type) { 2378 ptr_ = dex_file.GetEncodedStaticFieldValuesArray(class_def); 2379 if (ptr_ == nullptr) { 2380 array_size_ = 0; 2381 } else { 2382 array_size_ = DecodeUnsignedLeb128(&ptr_); 2383 } 2384 if (array_size_ > 0) { 2385 Next(); 2386 } 2387 } 2388 2389 void EncodedStaticFieldValueIterator::Next() { 2390 pos_++; 2391 if (pos_ >= array_size_) { 2392 return; 2393 } 2394 uint8_t value_type = *ptr_++; 2395 uint8_t value_arg = value_type >> kEncodedValueArgShift; 2396 size_t width = value_arg + 1; // assume and correct later 2397 type_ = static_cast<ValueType>(value_type & kEncodedValueTypeMask); 2398 switch (type_) { 2399 case kBoolean: 2400 jval_.i = (value_arg != 0) ? 1 : 0; 2401 width = 0; 2402 break; 2403 case kByte: 2404 jval_.i = ReadSignedInt(ptr_, value_arg); 2405 CHECK(IsInt<8>(jval_.i)); 2406 break; 2407 case kShort: 2408 jval_.i = ReadSignedInt(ptr_, value_arg); 2409 CHECK(IsInt<16>(jval_.i)); 2410 break; 2411 case kChar: 2412 jval_.i = ReadUnsignedInt(ptr_, value_arg, false); 2413 CHECK(IsUint<16>(jval_.i)); 2414 break; 2415 case kInt: 2416 jval_.i = ReadSignedInt(ptr_, value_arg); 2417 break; 2418 case kLong: 2419 jval_.j = ReadSignedLong(ptr_, value_arg); 2420 break; 2421 case kFloat: 2422 jval_.i = ReadUnsignedInt(ptr_, value_arg, true); 2423 break; 2424 case kDouble: 2425 jval_.j = ReadUnsignedLong(ptr_, value_arg, true); 2426 break; 2427 case kString: 2428 case kType: 2429 jval_.i = ReadUnsignedInt(ptr_, value_arg, false); 2430 break; 2431 case kField: 2432 case kMethod: 2433 case kEnum: 2434 case kArray: 2435 case kAnnotation: 2436 UNIMPLEMENTED(FATAL) << ": type " << type_; 2437 UNREACHABLE(); 2438 case kNull: 2439 jval_.l = nullptr; 2440 width = 0; 2441 break; 2442 default: 2443 LOG(FATAL) << "Unreached"; 2444 UNREACHABLE(); 2445 } 2446 ptr_ += width; 2447 } 2448 2449 template<bool kTransactionActive> 2450 void EncodedStaticFieldValueIterator::ReadValueToField(ArtField* field) const { 2451 DCHECK(dex_cache_ != nullptr); 2452 DCHECK(class_loader_ != nullptr); 2453 switch (type_) { 2454 case kBoolean: field->SetBoolean<kTransactionActive>(field->GetDeclaringClass(), jval_.z); 2455 break; 2456 case kByte: field->SetByte<kTransactionActive>(field->GetDeclaringClass(), jval_.b); break; 2457 case kShort: field->SetShort<kTransactionActive>(field->GetDeclaringClass(), jval_.s); break; 2458 case kChar: field->SetChar<kTransactionActive>(field->GetDeclaringClass(), jval_.c); break; 2459 case kInt: field->SetInt<kTransactionActive>(field->GetDeclaringClass(), jval_.i); break; 2460 case kLong: field->SetLong<kTransactionActive>(field->GetDeclaringClass(), jval_.j); break; 2461 case kFloat: field->SetFloat<kTransactionActive>(field->GetDeclaringClass(), jval_.f); break; 2462 case kDouble: field->SetDouble<kTransactionActive>(field->GetDeclaringClass(), jval_.d); break; 2463 case kNull: field->SetObject<kTransactionActive>(field->GetDeclaringClass(), nullptr); break; 2464 case kString: { 2465 mirror::String* resolved = linker_->ResolveString(dex_file_, jval_.i, *dex_cache_); 2466 field->SetObject<kTransactionActive>(field->GetDeclaringClass(), resolved); 2467 break; 2468 } 2469 case kType: { 2470 mirror::Class* resolved = linker_->ResolveType(dex_file_, jval_.i, *dex_cache_, 2471 *class_loader_); 2472 field->SetObject<kTransactionActive>(field->GetDeclaringClass(), resolved); 2473 break; 2474 } 2475 default: UNIMPLEMENTED(FATAL) << ": type " << type_; 2476 } 2477 } 2478 template void EncodedStaticFieldValueIterator::ReadValueToField<true>(ArtField* field) const; 2479 template void EncodedStaticFieldValueIterator::ReadValueToField<false>(ArtField* field) const; 2480 2481 CatchHandlerIterator::CatchHandlerIterator(const DexFile::CodeItem& code_item, uint32_t address) { 2482 handler_.address_ = -1; 2483 int32_t offset = -1; 2484 2485 // Short-circuit the overwhelmingly common cases. 2486 switch (code_item.tries_size_) { 2487 case 0: 2488 break; 2489 case 1: { 2490 const DexFile::TryItem* tries = DexFile::GetTryItems(code_item, 0); 2491 uint32_t start = tries->start_addr_; 2492 if (address >= start) { 2493 uint32_t end = start + tries->insn_count_; 2494 if (address < end) { 2495 offset = tries->handler_off_; 2496 } 2497 } 2498 break; 2499 } 2500 default: 2501 offset = DexFile::FindCatchHandlerOffset(code_item, address); 2502 } 2503 Init(code_item, offset); 2504 } 2505 2506 CatchHandlerIterator::CatchHandlerIterator(const DexFile::CodeItem& code_item, 2507 const DexFile::TryItem& try_item) { 2508 handler_.address_ = -1; 2509 Init(code_item, try_item.handler_off_); 2510 } 2511 2512 void CatchHandlerIterator::Init(const DexFile::CodeItem& code_item, 2513 int32_t offset) { 2514 if (offset >= 0) { 2515 Init(DexFile::GetCatchHandlerData(code_item, offset)); 2516 } else { 2517 // Not found, initialize as empty 2518 current_data_ = nullptr; 2519 remaining_count_ = -1; 2520 catch_all_ = false; 2521 DCHECK(!HasNext()); 2522 } 2523 } 2524 2525 void CatchHandlerIterator::Init(const uint8_t* handler_data) { 2526 current_data_ = handler_data; 2527 remaining_count_ = DecodeSignedLeb128(¤t_data_); 2528 2529 // If remaining_count_ is non-positive, then it is the negative of 2530 // the number of catch types, and the catches are followed by a 2531 // catch-all handler. 2532 if (remaining_count_ <= 0) { 2533 catch_all_ = true; 2534 remaining_count_ = -remaining_count_; 2535 } else { 2536 catch_all_ = false; 2537 } 2538 Next(); 2539 } 2540 2541 void CatchHandlerIterator::Next() { 2542 if (remaining_count_ > 0) { 2543 handler_.type_idx_ = DecodeUnsignedLeb128(¤t_data_); 2544 handler_.address_ = DecodeUnsignedLeb128(¤t_data_); 2545 remaining_count_--; 2546 return; 2547 } 2548 2549 if (catch_all_) { 2550 handler_.type_idx_ = DexFile::kDexNoIndex16; 2551 handler_.address_ = DecodeUnsignedLeb128(¤t_data_); 2552 catch_all_ = false; 2553 return; 2554 } 2555 2556 // no more handler 2557 remaining_count_ = -1; 2558 } 2559 2560 } // namespace art 2561
