oat_file.cc revision fb7775981c7e6ecca78dcce774e9cc4db63e6e99
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "oat_file.h" 18 19#include <dlfcn.h> 20#include <sstream> 21#include <string.h> 22 23#include "base/bit_vector.h" 24#include "base/stl_util.h" 25#include "base/unix_file/fd_file.h" 26#include "elf_file.h" 27#include "elf_utils.h" 28#include "oat.h" 29#include "mirror/art_method.h" 30#include "mirror/art_method-inl.h" 31#include "mirror/class.h" 32#include "mirror/object-inl.h" 33#include "os.h" 34#include "runtime.h" 35#include "utils.h" 36#include "vmap_table.h" 37 38namespace art { 39 40void OatFile::CheckLocation(const std::string& location) { 41 CHECK(!location.empty()); 42} 43 44OatFile* OatFile::OpenWithElfFile(ElfFile* elf_file, 45 const std::string& location, 46 std::string* error_msg) { 47 std::unique_ptr<OatFile> oat_file(new OatFile(location, false)); 48 oat_file->elf_file_.reset(elf_file); 49 Elf32_Shdr* hdr = elf_file->FindSectionByName(".rodata"); 50 oat_file->begin_ = elf_file->Begin() + hdr->sh_offset; 51 oat_file->end_ = elf_file->Begin() + hdr->sh_size + hdr->sh_offset; 52 return oat_file->Setup(error_msg) ? oat_file.release() : nullptr; 53} 54 55OatFile* OatFile::OpenMemory(std::vector<uint8_t>& oat_contents, 56 const std::string& location, 57 std::string* error_msg) { 58 CHECK(!oat_contents.empty()) << location; 59 CheckLocation(location); 60 std::unique_ptr<OatFile> oat_file(new OatFile(location, false)); 61 oat_file->begin_ = &oat_contents[0]; 62 oat_file->end_ = &oat_contents[oat_contents.size()]; 63 return oat_file->Setup(error_msg) ? oat_file.release() : nullptr; 64} 65 66OatFile* OatFile::Open(const std::string& filename, 67 const std::string& location, 68 byte* requested_base, 69 bool executable, 70 std::string* error_msg) { 71 CHECK(!filename.empty()) << location; 72 CheckLocation(filename); 73 std::unique_ptr<OatFile> ret; 74 if (kUsePortableCompiler && executable) { 75 // If we are using PORTABLE, use dlopen to deal with relocations. 76 // 77 // We use our own ELF loader for Quick to deal with legacy apps that 78 // open a generated dex file by name, remove the file, then open 79 // another generated dex file with the same name. http://b/10614658 80 ret.reset(OpenDlopen(filename, location, requested_base, error_msg)); 81 } else { 82 // If we aren't trying to execute, we just use our own ElfFile loader for a couple reasons: 83 // 84 // On target, dlopen may fail when compiling due to selinux restrictions on installd. 85 // 86 // On host, dlopen is expected to fail when cross compiling, so fall back to OpenElfFile. 87 // This won't work for portable runtime execution because it doesn't process relocations. 88 std::unique_ptr<File> file(OS::OpenFileForReading(filename.c_str())); 89 if (file.get() == NULL) { 90 *error_msg = StringPrintf("Failed to open oat filename for reading: %s", strerror(errno)); 91 return nullptr; 92 } 93 ret.reset(OpenElfFile(file.get(), location, requested_base, false, executable, error_msg)); 94 } 95 return ret.release(); 96} 97 98OatFile* OatFile::OpenWritable(File* file, const std::string& location, std::string* error_msg) { 99 CheckLocation(location); 100 return OpenElfFile(file, location, NULL, true, false, error_msg); 101} 102 103OatFile* OatFile::OpenReadable(File* file, const std::string& location, std::string* error_msg) { 104 CheckLocation(location); 105 return OpenElfFile(file, location, NULL, false, false, error_msg); 106} 107 108OatFile* OatFile::OpenDlopen(const std::string& elf_filename, 109 const std::string& location, 110 byte* requested_base, 111 std::string* error_msg) { 112 std::unique_ptr<OatFile> oat_file(new OatFile(location, true)); 113 bool success = oat_file->Dlopen(elf_filename, requested_base, error_msg); 114 if (!success) { 115 return nullptr; 116 } 117 return oat_file.release(); 118} 119 120OatFile* OatFile::OpenElfFile(File* file, 121 const std::string& location, 122 byte* requested_base, 123 bool writable, 124 bool executable, 125 std::string* error_msg) { 126 std::unique_ptr<OatFile> oat_file(new OatFile(location, executable)); 127 bool success = oat_file->ElfFileOpen(file, requested_base, writable, executable, error_msg); 128 if (!success) { 129 CHECK(!error_msg->empty()); 130 return nullptr; 131 } 132 return oat_file.release(); 133} 134 135OatFile::OatFile(const std::string& location, bool is_executable) 136 : location_(location), begin_(NULL), end_(NULL), is_executable_(is_executable), 137 dlopen_handle_(NULL), 138 secondary_lookup_lock_("OatFile secondary lookup lock", kOatFileSecondaryLookupLock) { 139 CHECK(!location_.empty()); 140} 141 142OatFile::~OatFile() { 143 STLDeleteValues(&oat_dex_files_); 144 if (dlopen_handle_ != NULL) { 145 dlclose(dlopen_handle_); 146 } 147} 148 149bool OatFile::Dlopen(const std::string& elf_filename, byte* requested_base, 150 std::string* error_msg) { 151 char* absolute_path = realpath(elf_filename.c_str(), NULL); 152 if (absolute_path == NULL) { 153 *error_msg = StringPrintf("Failed to find absolute path for '%s'", elf_filename.c_str()); 154 return false; 155 } 156 dlopen_handle_ = dlopen(absolute_path, RTLD_NOW); 157 free(absolute_path); 158 if (dlopen_handle_ == NULL) { 159 *error_msg = StringPrintf("Failed to dlopen '%s': %s", elf_filename.c_str(), dlerror()); 160 return false; 161 } 162 begin_ = reinterpret_cast<byte*>(dlsym(dlopen_handle_, "oatdata")); 163 if (begin_ == NULL) { 164 *error_msg = StringPrintf("Failed to find oatdata symbol in '%s': %s", elf_filename.c_str(), 165 dlerror()); 166 return false; 167 } 168 if (requested_base != NULL && begin_ != requested_base) { 169 *error_msg = StringPrintf("Failed to find oatdata symbol at expected address: " 170 "oatdata=%p != expected=%p /proc/self/maps:\n", 171 begin_, requested_base); 172 ReadFileToString("/proc/self/maps", error_msg); 173 return false; 174 } 175 end_ = reinterpret_cast<byte*>(dlsym(dlopen_handle_, "oatlastword")); 176 if (end_ == NULL) { 177 *error_msg = StringPrintf("Failed to find oatlastword symbol in '%s': %s", elf_filename.c_str(), 178 dlerror()); 179 return false; 180 } 181 // Readjust to be non-inclusive upper bound. 182 end_ += sizeof(uint32_t); 183 return Setup(error_msg); 184} 185 186bool OatFile::ElfFileOpen(File* file, byte* requested_base, bool writable, bool executable, 187 std::string* error_msg) { 188 elf_file_.reset(ElfFile::Open(file, writable, true, error_msg)); 189 if (elf_file_.get() == nullptr) { 190 DCHECK(!error_msg->empty()); 191 return false; 192 } 193 bool loaded = elf_file_->Load(executable, error_msg); 194 if (!loaded) { 195 DCHECK(!error_msg->empty()); 196 return false; 197 } 198 begin_ = elf_file_->FindDynamicSymbolAddress("oatdata"); 199 if (begin_ == NULL) { 200 *error_msg = StringPrintf("Failed to find oatdata symbol in '%s'", file->GetPath().c_str()); 201 return false; 202 } 203 if (requested_base != NULL && begin_ != requested_base) { 204 *error_msg = StringPrintf("Failed to find oatdata symbol at expected address: " 205 "oatdata=%p != expected=%p /proc/self/maps:\n", 206 begin_, requested_base); 207 ReadFileToString("/proc/self/maps", error_msg); 208 return false; 209 } 210 end_ = elf_file_->FindDynamicSymbolAddress("oatlastword"); 211 if (end_ == NULL) { 212 *error_msg = StringPrintf("Failed to find oatlastword symbol in '%s'", file->GetPath().c_str()); 213 return false; 214 } 215 // Readjust to be non-inclusive upper bound. 216 end_ += sizeof(uint32_t); 217 return Setup(error_msg); 218} 219 220bool OatFile::Setup(std::string* error_msg) { 221 if (!GetOatHeader().IsValid()) { 222 *error_msg = StringPrintf("Invalid oat magic for '%s'", GetLocation().c_str()); 223 return false; 224 } 225 const byte* oat = Begin(); 226 oat += sizeof(OatHeader); 227 if (oat > End()) { 228 *error_msg = StringPrintf("In oat file '%s' found truncated OatHeader", GetLocation().c_str()); 229 return false; 230 } 231 232 oat += GetOatHeader().GetKeyValueStoreSize(); 233 if (oat > End()) { 234 *error_msg = StringPrintf("In oat file '%s' found truncated variable-size data: " 235 "%p + %zd + %ud <= %p", GetLocation().c_str(), 236 Begin(), sizeof(OatHeader), GetOatHeader().GetKeyValueStoreSize(), 237 End()); 238 return false; 239 } 240 241 for (size_t i = 0; i < GetOatHeader().GetDexFileCount(); i++) { 242 uint32_t dex_file_location_size = *reinterpret_cast<const uint32_t*>(oat); 243 if (UNLIKELY(dex_file_location_size == 0U)) { 244 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd with empty location name", 245 GetLocation().c_str(), i); 246 return false; 247 } 248 oat += sizeof(dex_file_location_size); 249 if (UNLIKELY(oat > End())) { 250 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd truncated after dex file " 251 "location size", GetLocation().c_str(), i); 252 return false; 253 } 254 255 const char* dex_file_location_data = reinterpret_cast<const char*>(oat); 256 oat += dex_file_location_size; 257 if (UNLIKELY(oat > End())) { 258 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd with truncated dex file " 259 "location", GetLocation().c_str(), i); 260 return false; 261 } 262 263 std::string dex_file_location(dex_file_location_data, dex_file_location_size); 264 265 uint32_t dex_file_checksum = *reinterpret_cast<const uint32_t*>(oat); 266 oat += sizeof(dex_file_checksum); 267 if (UNLIKELY(oat > End())) { 268 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' truncated after " 269 "dex file checksum", GetLocation().c_str(), i, 270 dex_file_location.c_str()); 271 return false; 272 } 273 274 uint32_t dex_file_offset = *reinterpret_cast<const uint32_t*>(oat); 275 if (UNLIKELY(dex_file_offset == 0U)) { 276 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with zero dex " 277 "file offset", GetLocation().c_str(), i, dex_file_location.c_str()); 278 return false; 279 } 280 if (UNLIKELY(dex_file_offset > Size())) { 281 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with dex file " 282 "offset %ud > %zd", GetLocation().c_str(), i, 283 dex_file_location.c_str(), dex_file_offset, Size()); 284 return false; 285 } 286 oat += sizeof(dex_file_offset); 287 if (UNLIKELY(oat > End())) { 288 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' truncated " 289 " after dex file offsets", GetLocation().c_str(), i, 290 dex_file_location.c_str()); 291 return false; 292 } 293 294 const uint8_t* dex_file_pointer = Begin() + dex_file_offset; 295 if (UNLIKELY(!DexFile::IsMagicValid(dex_file_pointer))) { 296 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with invalid " 297 " dex file magic '%s'", GetLocation().c_str(), i, 298 dex_file_location.c_str(), dex_file_pointer); 299 return false; 300 } 301 if (UNLIKELY(!DexFile::IsVersionValid(dex_file_pointer))) { 302 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with invalid " 303 " dex file version '%s'", GetLocation().c_str(), i, 304 dex_file_location.c_str(), dex_file_pointer); 305 return false; 306 } 307 const DexFile::Header* header = reinterpret_cast<const DexFile::Header*>(dex_file_pointer); 308 const uint32_t* methods_offsets_pointer = reinterpret_cast<const uint32_t*>(oat); 309 310 oat += (sizeof(*methods_offsets_pointer) * header->class_defs_size_); 311 if (UNLIKELY(oat > End())) { 312 *error_msg = StringPrintf("In oat file '%s' found OatDexFile #%zd for '%s' with truncated " 313 " method offsets", GetLocation().c_str(), i, 314 dex_file_location.c_str()); 315 return false; 316 } 317 318 // Create the OatDexFile and add it to the owning map indexed by the dex file location. 319 OatDexFile* oat_dex_file = new OatDexFile(this, 320 dex_file_location, 321 dex_file_checksum, 322 dex_file_pointer, 323 methods_offsets_pointer); 324 StringPiece key(oat_dex_file->GetDexFileLocation()); 325 oat_dex_files_.Put(key, oat_dex_file); 326 } 327 return true; 328} 329 330const OatHeader& OatFile::GetOatHeader() const { 331 return *reinterpret_cast<const OatHeader*>(Begin()); 332} 333 334const byte* OatFile::Begin() const { 335 CHECK(begin_ != NULL); 336 return begin_; 337} 338 339const byte* OatFile::End() const { 340 CHECK(end_ != NULL); 341 return end_; 342} 343 344const OatFile::OatDexFile* OatFile::GetOatDexFile(const char* dex_location, 345 const uint32_t* dex_location_checksum, 346 bool warn_if_not_found) const { 347 // NOTE: We assume here that the canonical location for a given dex_location never 348 // changes. If it does (i.e. some symlink used by the filename changes) we may return 349 // an incorrect OatDexFile. As long as we have a checksum to check, we shall return 350 // an identical file or fail; otherwise we may see some unpredictable failures. 351 352 // TODO: Additional analysis of usage patterns to see if this can be simplified 353 // without any performance loss, for example by not doing the first lock-free lookup. 354 355 const OatFile::OatDexFile* oat_dex_file = nullptr; 356 StringPiece key(dex_location); 357 // Try to find the key cheaply in the oat_dex_files_ map which holds dex locations 358 // directly mentioned in the oat file and doesn't require locking. 359 auto primary_it = oat_dex_files_.find(key); 360 if (primary_it != oat_dex_files_.end()) { 361 oat_dex_file = primary_it->second; 362 DCHECK(oat_dex_file != nullptr); 363 } else { 364 // This dex_location is not one of the dex locations directly mentioned in the 365 // oat file. The correct lookup is via the canonical location but first see in 366 // the secondary_oat_dex_files_ whether we've looked up this location before. 367 MutexLock mu(Thread::Current(), secondary_lookup_lock_); 368 auto secondary_lb = secondary_oat_dex_files_.lower_bound(key); 369 if (secondary_lb != secondary_oat_dex_files_.end() && key == secondary_lb->first) { 370 oat_dex_file = secondary_lb->second; // May be nullptr. 371 } else { 372 // We haven't seen this dex_location before, we must check the canonical location. 373 if (UNLIKELY(oat_dex_files_by_canonical_location_.empty())) { 374 // Lazily fill in the oat_dex_files_by_canonical_location_. 375 for (const auto& entry : oat_dex_files_) { 376 const std::string& dex_location = entry.second->GetDexFileLocation(); 377 string_cache_.emplace_back(DexFile::GetDexCanonicalLocation(dex_location.c_str())); 378 StringPiece canonical_location_key(string_cache_.back()); 379 oat_dex_files_by_canonical_location_.Put(canonical_location_key, entry.second); 380 } 381 } 382 std::string dex_canonical_location = DexFile::GetDexCanonicalLocation(dex_location); 383 StringPiece canonical_key(dex_canonical_location); 384 auto canonical_it = oat_dex_files_by_canonical_location_.find(canonical_key); 385 if (canonical_it != oat_dex_files_by_canonical_location_.end()) { 386 oat_dex_file = canonical_it->second; 387 } // else keep nullptr. 388 389 // Copy the key to the string_cache_ and store the result in secondary map. 390 string_cache_.emplace_back(key.data(), key.length()); 391 StringPiece key_copy(string_cache_.back()); 392 secondary_oat_dex_files_.PutBefore(secondary_lb, key_copy, oat_dex_file); 393 } 394 } 395 if (oat_dex_file != nullptr && 396 (dex_location_checksum == nullptr || 397 oat_dex_file->GetDexFileLocationChecksum() == *dex_location_checksum)) { 398 return oat_dex_file; 399 } 400 401 if (warn_if_not_found) { 402 std::string dex_canonical_location = DexFile::GetDexCanonicalLocation(dex_location); 403 std::string checksum("<unspecified>"); 404 if (dex_location_checksum != NULL) { 405 checksum = StringPrintf("0x%08x", *dex_location_checksum); 406 } 407 LOG(WARNING) << "Failed to find OatDexFile for DexFile " << dex_location 408 << " ( canonical path " << dex_canonical_location << ")" 409 << " with checksum " << checksum << " in OatFile " << GetLocation(); 410 if (kIsDebugBuild) { 411 for (Table::const_iterator it = oat_dex_files_.begin(); it != oat_dex_files_.end(); ++it) { 412 LOG(WARNING) << "OatFile " << GetLocation() 413 << " contains OatDexFile " << it->second->GetDexFileLocation() 414 << " (canonical path " << it->first << ")" 415 << " with checksum 0x" << std::hex << it->second->GetDexFileLocationChecksum(); 416 } 417 } 418 } 419 420 return NULL; 421} 422 423std::vector<const OatFile::OatDexFile*> OatFile::GetOatDexFiles() const { 424 std::vector<const OatFile::OatDexFile*> result; 425 for (Table::const_iterator it = oat_dex_files_.begin(); it != oat_dex_files_.end(); ++it) { 426 result.push_back(it->second); 427 } 428 return result; 429} 430 431OatFile::OatDexFile::OatDexFile(const OatFile* oat_file, 432 const std::string& dex_file_location, 433 uint32_t dex_file_location_checksum, 434 const byte* dex_file_pointer, 435 const uint32_t* oat_class_offsets_pointer) 436 : oat_file_(oat_file), 437 dex_file_location_(dex_file_location), 438 dex_file_location_checksum_(dex_file_location_checksum), 439 dex_file_pointer_(dex_file_pointer), 440 oat_class_offsets_pointer_(oat_class_offsets_pointer) {} 441 442OatFile::OatDexFile::~OatDexFile() {} 443 444size_t OatFile::OatDexFile::FileSize() const { 445 return reinterpret_cast<const DexFile::Header*>(dex_file_pointer_)->file_size_; 446} 447 448const DexFile* OatFile::OatDexFile::OpenDexFile(std::string* error_msg) const { 449 return DexFile::Open(dex_file_pointer_, FileSize(), dex_file_location_, 450 dex_file_location_checksum_, error_msg); 451} 452 453OatFile::OatClass OatFile::OatDexFile::GetOatClass(uint16_t class_def_index) const { 454 uint32_t oat_class_offset = oat_class_offsets_pointer_[class_def_index]; 455 456 const byte* oat_class_pointer = oat_file_->Begin() + oat_class_offset; 457 CHECK_LT(oat_class_pointer, oat_file_->End()) << oat_file_->GetLocation(); 458 459 const byte* status_pointer = oat_class_pointer; 460 CHECK_LT(status_pointer, oat_file_->End()) << oat_file_->GetLocation(); 461 mirror::Class::Status status = 462 static_cast<mirror::Class::Status>(*reinterpret_cast<const int16_t*>(status_pointer)); 463 CHECK_LT(status, mirror::Class::kStatusMax); 464 465 const byte* type_pointer = status_pointer + sizeof(uint16_t); 466 CHECK_LT(type_pointer, oat_file_->End()) << oat_file_->GetLocation(); 467 OatClassType type = static_cast<OatClassType>(*reinterpret_cast<const uint16_t*>(type_pointer)); 468 CHECK_LT(type, kOatClassMax); 469 470 const byte* after_type_pointer = type_pointer + sizeof(int16_t); 471 CHECK_LE(after_type_pointer, oat_file_->End()) << oat_file_->GetLocation(); 472 473 uint32_t bitmap_size = 0; 474 const byte* bitmap_pointer = nullptr; 475 const byte* methods_pointer = nullptr; 476 if (type == kOatClassSomeCompiled) { 477 bitmap_size = static_cast<uint32_t>(*reinterpret_cast<const uint32_t*>(after_type_pointer)); 478 bitmap_pointer = after_type_pointer + sizeof(bitmap_size); 479 CHECK_LE(bitmap_pointer, oat_file_->End()) << oat_file_->GetLocation(); 480 methods_pointer = bitmap_pointer + bitmap_size; 481 } else { 482 methods_pointer = after_type_pointer; 483 } 484 CHECK_LE(methods_pointer, oat_file_->End()) << oat_file_->GetLocation(); 485 486 return OatClass(oat_file_, 487 status, 488 type, 489 bitmap_size, 490 reinterpret_cast<const uint32_t*>(bitmap_pointer), 491 reinterpret_cast<const OatMethodOffsets*>(methods_pointer)); 492} 493 494OatFile::OatClass::OatClass(const OatFile* oat_file, 495 mirror::Class::Status status, 496 OatClassType type, 497 uint32_t bitmap_size, 498 const uint32_t* bitmap_pointer, 499 const OatMethodOffsets* methods_pointer) 500 : oat_file_(oat_file), status_(status), type_(type), 501 bitmap_(bitmap_pointer), methods_pointer_(methods_pointer) { 502 CHECK(methods_pointer != nullptr); 503 switch (type_) { 504 case kOatClassAllCompiled: { 505 CHECK_EQ(0U, bitmap_size); 506 CHECK(bitmap_pointer == nullptr); 507 break; 508 } 509 case kOatClassSomeCompiled: { 510 CHECK_NE(0U, bitmap_size); 511 CHECK(bitmap_pointer != nullptr); 512 break; 513 } 514 case kOatClassNoneCompiled: { 515 CHECK_EQ(0U, bitmap_size); 516 CHECK(bitmap_pointer == nullptr); 517 methods_pointer_ = nullptr; 518 break; 519 } 520 case kOatClassMax: { 521 LOG(FATAL) << "Invalid OatClassType " << type_; 522 break; 523 } 524 } 525} 526 527const OatFile::OatMethod OatFile::OatClass::GetOatMethod(uint32_t method_index) const { 528 // NOTE: We don't keep the number of methods and cannot do a bounds check for method_index. 529 if (methods_pointer_ == NULL) { 530 CHECK_EQ(kOatClassNoneCompiled, type_); 531 return OatMethod(NULL, 0, 0); 532 } 533 size_t methods_pointer_index; 534 if (bitmap_ == NULL) { 535 CHECK_EQ(kOatClassAllCompiled, type_); 536 methods_pointer_index = method_index; 537 } else { 538 CHECK_EQ(kOatClassSomeCompiled, type_); 539 if (!BitVector::IsBitSet(bitmap_, method_index)) { 540 return OatMethod(NULL, 0, 0); 541 } 542 size_t num_set_bits = BitVector::NumSetBits(bitmap_, method_index); 543 methods_pointer_index = num_set_bits; 544 } 545 const OatMethodOffsets& oat_method_offsets = methods_pointer_[methods_pointer_index]; 546 if (oat_file_->IsExecutable() || 547 Runtime::Current() == nullptr || // This case applies for oatdump. 548 Runtime::Current()->IsCompiler()) { 549 return OatMethod( 550 oat_file_->Begin(), 551 oat_method_offsets.code_offset_, 552 oat_method_offsets.gc_map_offset_); 553 } else { 554 // We aren't allowed to use the compiled code. We just force it down the interpreted version. 555 return OatMethod(oat_file_->Begin(), 0, 0); 556 } 557} 558 559OatFile::OatMethod::OatMethod(const byte* base, 560 const uint32_t code_offset, 561 const uint32_t gc_map_offset) 562 : begin_(base), 563 code_offset_(code_offset), 564 native_gc_map_offset_(gc_map_offset) { 565} 566 567OatFile::OatMethod::~OatMethod() {} 568 569 570uint32_t OatFile::OatMethod::GetQuickCodeSize() const { 571 uintptr_t code = reinterpret_cast<uintptr_t>(GetQuickCode()); 572 if (code == 0) { 573 return 0; 574 } 575 // TODO: make this Thumb2 specific 576 code &= ~0x1; 577 return reinterpret_cast<uint32_t*>(code)[-1]; 578} 579 580void OatFile::OatMethod::LinkMethod(mirror::ArtMethod* method) const { 581 CHECK(method != NULL); 582 method->SetEntryPointFromPortableCompiledCode(GetPortableCode()); 583 method->SetEntryPointFromQuickCompiledCode(GetQuickCode()); 584 method->SetNativeGcMap(GetNativeGcMap()); // Used by native methods in work around JNI mode. 585} 586 587} // namespace art 588