runtime.cc revision 07d83c7a25022064ac0a8dac4fe2a7a38681fa4b
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 "runtime.h" 18 19// sys/mount.h has to come before linux/fs.h due to redefinition of MS_RDONLY, MS_BIND, etc 20#include <sys/mount.h> 21#ifdef __linux__ 22#include <linux/fs.h> 23#endif 24 25#include <signal.h> 26#include <sys/syscall.h> 27#include <valgrind.h> 28 29#include <cstdio> 30#include <cstdlib> 31#include <limits> 32#include <memory> 33#include <vector> 34#include <fcntl.h> 35 36#include "arch/arm/quick_method_frame_info_arm.h" 37#include "arch/arm/registers_arm.h" 38#include "arch/arm64/quick_method_frame_info_arm64.h" 39#include "arch/arm64/registers_arm64.h" 40#include "arch/mips/quick_method_frame_info_mips.h" 41#include "arch/mips/registers_mips.h" 42#include "arch/x86/quick_method_frame_info_x86.h" 43#include "arch/x86/registers_x86.h" 44#include "arch/x86_64/quick_method_frame_info_x86_64.h" 45#include "arch/x86_64/registers_x86_64.h" 46#include "asm_support.h" 47#include "atomic.h" 48#include "base/unix_file/fd_file.h" 49#include "class_linker.h" 50#include "debugger.h" 51#include "elf_file.h" 52#include "entrypoints/runtime_asm_entrypoints.h" 53#include "fault_handler.h" 54#include "gc/accounting/card_table-inl.h" 55#include "gc/heap.h" 56#include "gc/space/image_space.h" 57#include "gc/space/space.h" 58#include "image.h" 59#include "instrumentation.h" 60#include "intern_table.h" 61#include "jni_internal.h" 62#include "mirror/art_field-inl.h" 63#include "mirror/art_method-inl.h" 64#include "mirror/array.h" 65#include "mirror/class-inl.h" 66#include "mirror/class_loader.h" 67#include "mirror/stack_trace_element.h" 68#include "mirror/throwable.h" 69#include "monitor.h" 70#include "native_bridge_art_interface.h" 71#include "parsed_options.h" 72#include "oat_file.h" 73#include "os.h" 74#include "quick/quick_method_frame_info.h" 75#include "reflection.h" 76#include "ScopedLocalRef.h" 77#include "scoped_thread_state_change.h" 78#include "sigchain.h" 79#include "signal_catcher.h" 80#include "signal_set.h" 81#include "handle_scope-inl.h" 82#include "thread.h" 83#include "thread_list.h" 84#include "trace.h" 85#include "transaction.h" 86#include "profiler.h" 87#include "verifier/method_verifier.h" 88#include "well_known_classes.h" 89 90#include "JniConstants.h" // Last to avoid LOG redefinition in ics-mr1-plus-art. 91 92#ifdef HAVE_ANDROID_OS 93#include "cutils/properties.h" 94#endif 95 96namespace art { 97 98// If a signal isn't handled properly, enable a handler that attempts to dump the Java stack. 99static constexpr bool kEnableJavaStackTraceHandler = false; 100Runtime* Runtime::instance_ = nullptr; 101 102Runtime::Runtime() 103 : instruction_set_(kNone), 104 compiler_callbacks_(nullptr), 105 is_zygote_(false), 106 must_relocate_(false), 107 is_concurrent_gc_enabled_(true), 108 is_explicit_gc_disabled_(false), 109 dex2oat_enabled_(true), 110 image_dex2oat_enabled_(true), 111 default_stack_size_(0), 112 heap_(nullptr), 113 max_spins_before_thin_lock_inflation_(Monitor::kDefaultMaxSpinsBeforeThinLockInflation), 114 monitor_list_(nullptr), 115 monitor_pool_(nullptr), 116 thread_list_(nullptr), 117 intern_table_(nullptr), 118 class_linker_(nullptr), 119 signal_catcher_(nullptr), 120 java_vm_(nullptr), 121 fault_message_lock_("Fault message lock"), 122 fault_message_(""), 123 method_verifier_lock_("Method verifiers lock"), 124 threads_being_born_(0), 125 shutdown_cond_(new ConditionVariable("Runtime shutdown", *Locks::runtime_shutdown_lock_)), 126 shutting_down_(false), 127 shutting_down_started_(false), 128 started_(false), 129 finished_starting_(false), 130 vfprintf_(nullptr), 131 exit_(nullptr), 132 abort_(nullptr), 133 stats_enabled_(false), 134 running_on_valgrind_(RUNNING_ON_VALGRIND > 0), 135 profiler_started_(false), 136 method_trace_(false), 137 method_trace_file_size_(0), 138 instrumentation_(), 139 use_compile_time_class_path_(false), 140 main_thread_group_(nullptr), 141 system_thread_group_(nullptr), 142 system_class_loader_(nullptr), 143 dump_gc_performance_on_shutdown_(false), 144 preinitialization_transaction_(nullptr), 145 verify_(false), 146 target_sdk_version_(0), 147 implicit_null_checks_(false), 148 implicit_so_checks_(false), 149 implicit_suspend_checks_(false), 150 is_native_bridge_loaded_(false) { 151 CheckAsmSupportOffsetsAndSizes(); 152} 153 154Runtime::~Runtime() { 155 if (is_native_bridge_loaded_) { 156 UnloadNativeBridge(); 157 } 158 if (dump_gc_performance_on_shutdown_) { 159 // This can't be called from the Heap destructor below because it 160 // could call RosAlloc::InspectAll() which needs the thread_list 161 // to be still alive. 162 heap_->DumpGcPerformanceInfo(LOG(INFO)); 163 } 164 165 Thread* self = Thread::Current(); 166 { 167 MutexLock mu(self, *Locks::runtime_shutdown_lock_); 168 shutting_down_started_ = true; 169 while (threads_being_born_ > 0) { 170 shutdown_cond_->Wait(self); 171 } 172 shutting_down_ = true; 173 } 174 // Shut down background profiler before the runtime exits. 175 if (profiler_started_) { 176 BackgroundMethodSamplingProfiler::Shutdown(); 177 } 178 179 Trace::Shutdown(); 180 181 // Make sure to let the GC complete if it is running. 182 heap_->WaitForGcToComplete(gc::kGcCauseBackground, self); 183 heap_->DeleteThreadPool(); 184 185 // Make sure our internal threads are dead before we start tearing down things they're using. 186 Dbg::StopJdwp(); 187 delete signal_catcher_; 188 189 // Make sure all other non-daemon threads have terminated, and all daemon threads are suspended. 190 delete thread_list_; 191 192 // Shutdown the fault manager if it was initialized. 193 fault_manager.Shutdown(); 194 195 delete monitor_list_; 196 delete monitor_pool_; 197 delete class_linker_; 198 delete heap_; 199 delete intern_table_; 200 delete java_vm_; 201 Thread::Shutdown(); 202 QuasiAtomic::Shutdown(); 203 verifier::MethodVerifier::Shutdown(); 204 MemMap::Shutdown(); 205 // TODO: acquire a static mutex on Runtime to avoid racing. 206 CHECK(instance_ == nullptr || instance_ == this); 207 instance_ = nullptr; 208} 209 210struct AbortState { 211 void Dump(std::ostream& os) { 212 if (gAborting > 1) { 213 os << "Runtime aborting --- recursively, so no thread-specific detail!\n"; 214 return; 215 } 216 gAborting++; 217 os << "Runtime aborting...\n"; 218 if (Runtime::Current() == NULL) { 219 os << "(Runtime does not yet exist!)\n"; 220 return; 221 } 222 Thread* self = Thread::Current(); 223 if (self == nullptr) { 224 os << "(Aborting thread was not attached to runtime!)\n"; 225 DumpKernelStack(os, GetTid(), " kernel: ", false); 226 DumpNativeStack(os, GetTid(), " native: ", nullptr); 227 } else { 228 os << "Aborting thread:\n"; 229 if (Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)) { 230 DumpThread(os, self); 231 } else { 232 if (Locks::mutator_lock_->SharedTryLock(self)) { 233 DumpThread(os, self); 234 Locks::mutator_lock_->SharedUnlock(self); 235 } 236 } 237 } 238 DumpAllThreads(os, self); 239 } 240 241 // No thread-safety analysis as we do explicitly test for holding the mutator lock. 242 void DumpThread(std::ostream& os, Thread* self) NO_THREAD_SAFETY_ANALYSIS { 243 DCHECK(Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)); 244 self->Dump(os); 245 if (self->IsExceptionPending()) { 246 ThrowLocation throw_location; 247 mirror::Throwable* exception = self->GetException(&throw_location); 248 os << "Pending exception " << PrettyTypeOf(exception) 249 << " thrown by '" << throw_location.Dump() << "'\n" 250 << exception->Dump(); 251 } 252 } 253 254 void DumpAllThreads(std::ostream& os, Thread* self) { 255 Runtime* runtime = Runtime::Current(); 256 if (runtime != nullptr) { 257 ThreadList* thread_list = runtime->GetThreadList(); 258 if (thread_list != nullptr) { 259 bool tll_already_held = Locks::thread_list_lock_->IsExclusiveHeld(self); 260 bool ml_already_held = Locks::mutator_lock_->IsSharedHeld(self); 261 if (!tll_already_held || !ml_already_held) { 262 os << "Dumping all threads without appropriate locks held:" 263 << (!tll_already_held ? " thread list lock" : "") 264 << (!ml_already_held ? " mutator lock" : "") 265 << "\n"; 266 } 267 os << "All threads:\n"; 268 thread_list->Dump(os); 269 } 270 } 271 } 272}; 273 274void Runtime::Abort() { 275 gAborting++; // set before taking any locks 276 277 // Ensure that we don't have multiple threads trying to abort at once, 278 // which would result in significantly worse diagnostics. 279 MutexLock mu(Thread::Current(), *Locks::abort_lock_); 280 281 // Get any pending output out of the way. 282 fflush(NULL); 283 284 // Many people have difficulty distinguish aborts from crashes, 285 // so be explicit. 286 AbortState state; 287 LOG(INTERNAL_FATAL) << Dumpable<AbortState>(state); 288 289 // Call the abort hook if we have one. 290 if (Runtime::Current() != NULL && Runtime::Current()->abort_ != NULL) { 291 LOG(INTERNAL_FATAL) << "Calling abort hook..."; 292 Runtime::Current()->abort_(); 293 // notreached 294 LOG(INTERNAL_FATAL) << "Unexpectedly returned from abort hook!"; 295 } 296 297#if defined(__GLIBC__) 298 // TODO: we ought to be able to use pthread_kill(3) here (or abort(3), 299 // which POSIX defines in terms of raise(3), which POSIX defines in terms 300 // of pthread_kill(3)). On Linux, though, libcorkscrew can't unwind through 301 // libpthread, which means the stacks we dump would be useless. Calling 302 // tgkill(2) directly avoids that. 303 syscall(__NR_tgkill, getpid(), GetTid(), SIGABRT); 304 // TODO: LLVM installs it's own SIGABRT handler so exit to be safe... Can we disable that in LLVM? 305 // If not, we could use sigaction(3) before calling tgkill(2) and lose this call to exit(3). 306 exit(1); 307#else 308 abort(); 309#endif 310 // notreached 311} 312 313void Runtime::PreZygoteFork() { 314 heap_->PreZygoteFork(); 315} 316 317void Runtime::CallExitHook(jint status) { 318 if (exit_ != NULL) { 319 ScopedThreadStateChange tsc(Thread::Current(), kNative); 320 exit_(status); 321 LOG(WARNING) << "Exit hook returned instead of exiting!"; 322 } 323} 324 325void Runtime::SweepSystemWeaks(IsMarkedCallback* visitor, void* arg) { 326 GetInternTable()->SweepInternTableWeaks(visitor, arg); 327 GetMonitorList()->SweepMonitorList(visitor, arg); 328 GetJavaVM()->SweepJniWeakGlobals(visitor, arg); 329} 330 331bool Runtime::Create(const RuntimeOptions& options, bool ignore_unrecognized) { 332 // TODO: acquire a static mutex on Runtime to avoid racing. 333 if (Runtime::instance_ != NULL) { 334 return false; 335 } 336 InitLogging(NULL); // Calls Locks::Init() as a side effect. 337 instance_ = new Runtime; 338 if (!instance_->Init(options, ignore_unrecognized)) { 339 delete instance_; 340 instance_ = NULL; 341 return false; 342 } 343 return true; 344} 345 346jobject CreateSystemClassLoader() { 347 if (Runtime::Current()->UseCompileTimeClassPath()) { 348 return NULL; 349 } 350 351 ScopedObjectAccess soa(Thread::Current()); 352 ClassLinker* cl = Runtime::Current()->GetClassLinker(); 353 354 StackHandleScope<2> hs(soa.Self()); 355 Handle<mirror::Class> class_loader_class( 356 hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_ClassLoader))); 357 CHECK(cl->EnsureInitialized(soa.Self(), class_loader_class, true, true)); 358 359 mirror::ArtMethod* getSystemClassLoader = 360 class_loader_class->FindDirectMethod("getSystemClassLoader", "()Ljava/lang/ClassLoader;"); 361 CHECK(getSystemClassLoader != NULL); 362 363 JValue result = InvokeWithJValues(soa, nullptr, soa.EncodeMethod(getSystemClassLoader), nullptr); 364 JNIEnv* env = soa.Self()->GetJniEnv(); 365 ScopedLocalRef<jobject> system_class_loader(env, 366 soa.AddLocalReference<jobject>(result.GetL())); 367 CHECK(system_class_loader.get() != nullptr); 368 369 soa.Self()->SetClassLoaderOverride(system_class_loader.get()); 370 371 Handle<mirror::Class> thread_class( 372 hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_Thread))); 373 CHECK(cl->EnsureInitialized(soa.Self(), thread_class, true, true)); 374 375 mirror::ArtField* contextClassLoader = 376 thread_class->FindDeclaredInstanceField("contextClassLoader", "Ljava/lang/ClassLoader;"); 377 CHECK(contextClassLoader != NULL); 378 379 // We can't run in a transaction yet. 380 contextClassLoader->SetObject<false>(soa.Self()->GetPeer(), 381 soa.Decode<mirror::ClassLoader*>(system_class_loader.get())); 382 383 return env->NewGlobalRef(system_class_loader.get()); 384} 385 386std::string Runtime::GetPatchoatExecutable() const { 387 if (!patchoat_executable_.empty()) { 388 return patchoat_executable_; 389 } 390 std::string patchoat_executable_(GetAndroidRoot()); 391 patchoat_executable_ += (kIsDebugBuild ? "/bin/patchoatd" : "/bin/patchoat"); 392 return patchoat_executable_; 393} 394 395std::string Runtime::GetCompilerExecutable() const { 396 if (!compiler_executable_.empty()) { 397 return compiler_executable_; 398 } 399 std::string compiler_executable(GetAndroidRoot()); 400 compiler_executable += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat"); 401 return compiler_executable; 402} 403 404bool Runtime::Start() { 405 VLOG(startup) << "Runtime::Start entering"; 406 407 // Restore main thread state to kNative as expected by native code. 408 Thread* self = Thread::Current(); 409 410 self->TransitionFromRunnableToSuspended(kNative); 411 412 started_ = true; 413 414 if (!IsImageDex2OatEnabled() || !Runtime::Current()->GetHeap()->HasImageSpace()) { 415 ScopedObjectAccess soa(Thread::Current()); 416 StackHandleScope<1> hs(soa.Self()); 417 auto klass(hs.NewHandle<mirror::Class>(mirror::Class::GetJavaLangClass())); 418 class_linker_->EnsureInitialized(soa.Self(), klass, true, true); 419 } 420 421 // InitNativeMethods needs to be after started_ so that the classes 422 // it touches will have methods linked to the oat file if necessary. 423 InitNativeMethods(); 424 425 // Initialize well known thread group values that may be accessed threads while attaching. 426 InitThreadGroups(self); 427 428 Thread::FinishStartup(); 429 430 system_class_loader_ = CreateSystemClassLoader(); 431 432 if (is_zygote_) { 433 if (!InitZygote()) { 434 return false; 435 } 436 } else { 437 if (is_native_bridge_loaded_) { 438 PreInitializeNativeBridge("."); 439 } 440 DidForkFromZygote(self->GetJniEnv(), NativeBridgeAction::kInitialize, 441 GetInstructionSetString(kRuntimeISA)); 442 } 443 444 StartDaemonThreads(); 445 446 { 447 ScopedObjectAccess soa(self); 448 self->GetJniEnv()->locals.AssertEmpty(); 449 } 450 451 VLOG(startup) << "Runtime::Start exiting"; 452 finished_starting_ = true; 453 454 if (profiler_options_.IsEnabled() && !profile_output_filename_.empty()) { 455 // User has asked for a profile using -Xenable-profiler. 456 // Create the profile file if it doesn't exist. 457 int fd = open(profile_output_filename_.c_str(), O_RDWR|O_CREAT|O_EXCL, 0660); 458 if (fd >= 0) { 459 close(fd); 460 } else if (errno != EEXIST) { 461 LOG(INFO) << "Failed to access the profile file. Profiler disabled."; 462 return true; 463 } 464 StartProfiler(profile_output_filename_.c_str()); 465 } 466 467 return true; 468} 469 470void Runtime::EndThreadBirth() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) { 471 DCHECK_GT(threads_being_born_, 0U); 472 threads_being_born_--; 473 if (shutting_down_started_ && threads_being_born_ == 0) { 474 shutdown_cond_->Broadcast(Thread::Current()); 475 } 476} 477 478// Do zygote-mode-only initialization. 479bool Runtime::InitZygote() { 480#ifdef __linux__ 481 // zygote goes into its own process group 482 setpgid(0, 0); 483 484 // See storage config details at http://source.android.com/tech/storage/ 485 // Create private mount namespace shared by all children 486 if (unshare(CLONE_NEWNS) == -1) { 487 PLOG(WARNING) << "Failed to unshare()"; 488 return false; 489 } 490 491 // Mark rootfs as being a slave so that changes from default 492 // namespace only flow into our children. 493 if (mount("rootfs", "/", NULL, (MS_SLAVE | MS_REC), NULL) == -1) { 494 PLOG(WARNING) << "Failed to mount() rootfs as MS_SLAVE"; 495 return false; 496 } 497 498 // Create a staging tmpfs that is shared by our children; they will 499 // bind mount storage into their respective private namespaces, which 500 // are isolated from each other. 501 const char* target_base = getenv("EMULATED_STORAGE_TARGET"); 502 if (target_base != NULL) { 503 if (mount("tmpfs", target_base, "tmpfs", MS_NOSUID | MS_NODEV, 504 "uid=0,gid=1028,mode=0751") == -1) { 505 LOG(WARNING) << "Failed to mount tmpfs to " << target_base; 506 return false; 507 } 508 } 509 510 return true; 511#else 512 UNIMPLEMENTED(FATAL); 513 return false; 514#endif 515} 516 517void Runtime::DidForkFromZygote(JNIEnv* env, NativeBridgeAction action, const char* isa) { 518 is_zygote_ = false; 519 520 if (is_native_bridge_loaded_) { 521 switch (action) { 522 case NativeBridgeAction::kUnload: 523 UnloadNativeBridge(); 524 is_native_bridge_loaded_ = false; 525 break; 526 527 case NativeBridgeAction::kInitialize: 528 InitializeNativeBridge(env, isa); 529 break; 530 } 531 } 532 533 // Create the thread pool. 534 heap_->CreateThreadPool(); 535 536 StartSignalCatcher(); 537 538 // Start the JDWP thread. If the command-line debugger flags specified "suspend=y", 539 // this will pause the runtime, so we probably want this to come last. 540 Dbg::StartJdwp(); 541} 542 543void Runtime::StartSignalCatcher() { 544 if (!is_zygote_) { 545 signal_catcher_ = new SignalCatcher(stack_trace_file_); 546 } 547} 548 549bool Runtime::IsShuttingDown(Thread* self) { 550 MutexLock mu(self, *Locks::runtime_shutdown_lock_); 551 return IsShuttingDownLocked(); 552} 553 554void Runtime::StartDaemonThreads() { 555 VLOG(startup) << "Runtime::StartDaemonThreads entering"; 556 557 Thread* self = Thread::Current(); 558 559 // Must be in the kNative state for calling native methods. 560 CHECK_EQ(self->GetState(), kNative); 561 562 JNIEnv* env = self->GetJniEnv(); 563 env->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons, 564 WellKnownClasses::java_lang_Daemons_start); 565 if (env->ExceptionCheck()) { 566 env->ExceptionDescribe(); 567 LOG(FATAL) << "Error starting java.lang.Daemons"; 568 } 569 570 VLOG(startup) << "Runtime::StartDaemonThreads exiting"; 571} 572 573static bool OpenDexFilesFromImage(const std::vector<std::string>& dex_filenames, 574 const std::string& image_location, 575 std::vector<const DexFile*>& dex_files, 576 size_t* failures) { 577 std::string system_filename; 578 bool has_system = false; 579 std::string cache_filename_unused; 580 bool dalvik_cache_exists_unused; 581 bool has_cache_unused; 582 bool is_global_cache_unused; 583 bool found_image = gc::space::ImageSpace::FindImageFilename(image_location.c_str(), 584 kRuntimeISA, 585 &system_filename, 586 &has_system, 587 &cache_filename_unused, 588 &dalvik_cache_exists_unused, 589 &has_cache_unused, 590 &is_global_cache_unused); 591 *failures = 0; 592 if (!found_image || !has_system) { 593 return false; 594 } 595 std::string error_msg; 596 // We are falling back to non-executable use of the oat file because patching failed, presumably 597 // due to lack of space. 598 std::string oat_filename = ImageHeader::GetOatLocationFromImageLocation(system_filename.c_str()); 599 std::string oat_location = ImageHeader::GetOatLocationFromImageLocation(image_location.c_str()); 600 std::unique_ptr<File> file(OS::OpenFileForReading(oat_filename.c_str())); 601 if (file.get() == nullptr) { 602 return false; 603 } 604 std::unique_ptr<ElfFile> elf_file(ElfFile::Open(file.release(), false, false, &error_msg)); 605 if (elf_file.get() == nullptr) { 606 return false; 607 } 608 std::unique_ptr<OatFile> oat_file(OatFile::OpenWithElfFile(elf_file.release(), oat_location, 609 &error_msg)); 610 if (oat_file.get() == nullptr) { 611 LOG(INFO) << "Unable to use '" << oat_filename << "' because " << error_msg; 612 return false; 613 } 614 615 for (const OatFile::OatDexFile* oat_dex_file : oat_file->GetOatDexFiles()) { 616 if (oat_dex_file == nullptr) { 617 *failures += 1; 618 continue; 619 } 620 const DexFile* dex_file = oat_dex_file->OpenDexFile(&error_msg); 621 if (dex_file == nullptr) { 622 *failures += 1; 623 } else { 624 dex_files.push_back(dex_file); 625 } 626 } 627 Runtime::Current()->GetClassLinker()->RegisterOatFile(oat_file.release()); 628 return true; 629} 630 631 632static size_t OpenDexFiles(const std::vector<std::string>& dex_filenames, 633 const std::string& image_location, 634 std::vector<const DexFile*>& dex_files) { 635 size_t failure_count = 0; 636 if (!image_location.empty() && OpenDexFilesFromImage(dex_filenames, image_location, dex_files, 637 &failure_count)) { 638 return failure_count; 639 } 640 failure_count = 0; 641 for (size_t i = 0; i < dex_filenames.size(); i++) { 642 const char* dex_filename = dex_filenames[i].c_str(); 643 std::string error_msg; 644 if (!OS::FileExists(dex_filename)) { 645 LOG(WARNING) << "Skipping non-existent dex file '" << dex_filename << "'"; 646 continue; 647 } 648 if (!DexFile::Open(dex_filename, dex_filename, &error_msg, &dex_files)) { 649 LOG(WARNING) << "Failed to open .dex from file '" << dex_filename << "': " << error_msg; 650 ++failure_count; 651 } 652 } 653 return failure_count; 654} 655 656bool Runtime::Init(const RuntimeOptions& raw_options, bool ignore_unrecognized) { 657 CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize); 658 659 MemMap::Init(); 660 661 std::unique_ptr<ParsedOptions> options(ParsedOptions::Create(raw_options, ignore_unrecognized)); 662 if (options.get() == nullptr) { 663 LOG(ERROR) << "Failed to parse options"; 664 return false; 665 } 666 VLOG(startup) << "Runtime::Init -verbose:startup enabled"; 667 668 QuasiAtomic::Startup(); 669 670 Monitor::Init(options->lock_profiling_threshold_, options->hook_is_sensitive_thread_); 671 672 boot_class_path_string_ = options->boot_class_path_string_; 673 class_path_string_ = options->class_path_string_; 674 properties_ = options->properties_; 675 676 compiler_callbacks_ = options->compiler_callbacks_; 677 patchoat_executable_ = options->patchoat_executable_; 678 must_relocate_ = options->must_relocate_; 679 is_zygote_ = options->is_zygote_; 680 is_explicit_gc_disabled_ = options->is_explicit_gc_disabled_; 681 dex2oat_enabled_ = options->dex2oat_enabled_; 682 image_dex2oat_enabled_ = options->image_dex2oat_enabled_; 683 684 vfprintf_ = options->hook_vfprintf_; 685 exit_ = options->hook_exit_; 686 abort_ = options->hook_abort_; 687 688 default_stack_size_ = options->stack_size_; 689 stack_trace_file_ = options->stack_trace_file_; 690 691 compiler_executable_ = options->compiler_executable_; 692 compiler_options_ = options->compiler_options_; 693 image_compiler_options_ = options->image_compiler_options_; 694 image_location_ = options->image_; 695 696 max_spins_before_thin_lock_inflation_ = options->max_spins_before_thin_lock_inflation_; 697 698 monitor_list_ = new MonitorList; 699 monitor_pool_ = MonitorPool::Create(); 700 thread_list_ = new ThreadList; 701 intern_table_ = new InternTable; 702 703 verify_ = options->verify_; 704 705 if (options->interpreter_only_) { 706 GetInstrumentation()->ForceInterpretOnly(); 707 } 708 709 heap_ = new gc::Heap(options->heap_initial_size_, 710 options->heap_growth_limit_, 711 options->heap_min_free_, 712 options->heap_max_free_, 713 options->heap_target_utilization_, 714 options->foreground_heap_growth_multiplier_, 715 options->heap_maximum_size_, 716 options->heap_non_moving_space_capacity_, 717 options->image_, 718 options->image_isa_, 719 options->collector_type_, 720 options->background_collector_type_, 721 options->large_object_space_type_, 722 options->large_object_threshold_, 723 options->parallel_gc_threads_, 724 options->conc_gc_threads_, 725 options->low_memory_mode_, 726 options->long_pause_log_threshold_, 727 options->long_gc_log_threshold_, 728 options->ignore_max_footprint_, 729 options->use_tlab_, 730 options->verify_pre_gc_heap_, 731 options->verify_pre_sweeping_heap_, 732 options->verify_post_gc_heap_, 733 options->verify_pre_gc_rosalloc_, 734 options->verify_pre_sweeping_rosalloc_, 735 options->verify_post_gc_rosalloc_, 736 options->use_homogeneous_space_compaction_for_oom_, 737 options->min_interval_homogeneous_space_compaction_by_oom_); 738 739 dump_gc_performance_on_shutdown_ = options->dump_gc_performance_on_shutdown_; 740 741 BlockSignals(); 742 InitPlatformSignalHandlers(); 743 744 // Change the implicit checks flags based on runtime architecture. 745 switch (kRuntimeISA) { 746 case kArm: 747 case kThumb2: 748 case kX86: 749 case kArm64: 750 case kX86_64: 751 implicit_null_checks_ = true; 752 // Installing stack protection does not play well with valgrind. 753 implicit_so_checks_ = (RUNNING_ON_VALGRIND == 0); 754 break; 755 default: 756 // Keep the defaults. 757 break; 758 } 759 760 // Always initialize the signal chain so that any calls to sigaction get 761 // correctly routed to the next in the chain regardless of whether we 762 // have claimed the signal or not. 763 InitializeSignalChain(); 764 765 if (implicit_null_checks_ || implicit_so_checks_ || implicit_suspend_checks_) { 766 fault_manager.Init(); 767 768 // These need to be in a specific order. The null point check handler must be 769 // after the suspend check and stack overflow check handlers. 770 // 771 // Note: the instances attach themselves to the fault manager and are handled by it. The manager 772 // will delete the instance on Shutdown(). 773 if (implicit_suspend_checks_) { 774 new SuspensionHandler(&fault_manager); 775 } 776 777 if (implicit_so_checks_) { 778 new StackOverflowHandler(&fault_manager); 779 } 780 781 if (implicit_null_checks_) { 782 new NullPointerHandler(&fault_manager); 783 } 784 785 if (kEnableJavaStackTraceHandler) { 786 new JavaStackTraceHandler(&fault_manager); 787 } 788 } 789 790 java_vm_ = new JavaVMExt(this, options.get()); 791 792 Thread::Startup(); 793 794 // ClassLinker needs an attached thread, but we can't fully attach a thread without creating 795 // objects. We can't supply a thread group yet; it will be fixed later. Since we are the main 796 // thread, we do not get a java peer. 797 Thread* self = Thread::Attach("main", false, nullptr, false); 798 CHECK_EQ(self->GetThreadId(), ThreadList::kMainThreadId); 799 CHECK(self != nullptr); 800 801 // Set us to runnable so tools using a runtime can allocate and GC by default 802 self->TransitionFromSuspendedToRunnable(); 803 804 // Now we're attached, we can take the heap locks and validate the heap. 805 GetHeap()->EnableObjectValidation(); 806 807 CHECK_GE(GetHeap()->GetContinuousSpaces().size(), 1U); 808 class_linker_ = new ClassLinker(intern_table_); 809 if (GetHeap()->HasImageSpace()) { 810 class_linker_->InitFromImage(); 811 if (kIsDebugBuild) { 812 GetHeap()->GetImageSpace()->VerifyImageAllocations(); 813 } 814 } else if (!IsCompiler() || !image_dex2oat_enabled_) { 815 std::vector<std::string> dex_filenames; 816 Split(boot_class_path_string_, ':', &dex_filenames); 817 std::vector<const DexFile*> boot_class_path; 818 OpenDexFiles(dex_filenames, options->image_, boot_class_path); 819 class_linker_->InitWithoutImage(boot_class_path); 820 // TODO: Should we move the following to InitWithoutImage? 821 SetInstructionSet(kRuntimeISA); 822 for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) { 823 Runtime::CalleeSaveType type = Runtime::CalleeSaveType(i); 824 if (!HasCalleeSaveMethod(type)) { 825 SetCalleeSaveMethod(CreateCalleeSaveMethod(type), type); 826 } 827 } 828 } else { 829 CHECK(options->boot_class_path_ != nullptr); 830 CHECK_NE(options->boot_class_path_->size(), 0U); 831 class_linker_->InitWithoutImage(*options->boot_class_path_); 832 } 833 CHECK(class_linker_ != nullptr); 834 835 // Initialize the special sentinel_ value early. 836 sentinel_ = GcRoot<mirror::Object>(class_linker_->AllocObject(self)); 837 CHECK(sentinel_.Read() != nullptr); 838 839 verifier::MethodVerifier::Init(); 840 841 method_trace_ = options->method_trace_; 842 method_trace_file_ = options->method_trace_file_; 843 method_trace_file_size_ = options->method_trace_file_size_; 844 845 profile_output_filename_ = options->profile_output_filename_; 846 profiler_options_ = options->profiler_options_; 847 848 // TODO: move this to just be an Trace::Start argument 849 Trace::SetDefaultClockSource(options->profile_clock_source_); 850 851 if (options->method_trace_) { 852 ScopedThreadStateChange tsc(self, kWaitingForMethodTracingStart); 853 Trace::Start(options->method_trace_file_.c_str(), -1, options->method_trace_file_size_, 0, 854 false, false, 0); 855 } 856 857 // Pre-allocate an OutOfMemoryError for the double-OOME case. 858 self->ThrowNewException(ThrowLocation(), "Ljava/lang/OutOfMemoryError;", 859 "OutOfMemoryError thrown while trying to throw OutOfMemoryError; " 860 "no stack trace available"); 861 pre_allocated_OutOfMemoryError_ = GcRoot<mirror::Throwable>(self->GetException(NULL)); 862 self->ClearException(); 863 864 // Pre-allocate a NoClassDefFoundError for the common case of failing to find a system class 865 // ahead of checking the application's class loader. 866 self->ThrowNewException(ThrowLocation(), "Ljava/lang/NoClassDefFoundError;", 867 "Class not found using the boot class loader; no stack trace available"); 868 pre_allocated_NoClassDefFoundError_ = GcRoot<mirror::Throwable>(self->GetException(NULL)); 869 self->ClearException(); 870 871 // Look for a native bridge. 872 // 873 // The intended flow here is, in the case of a running system: 874 // 875 // Runtime::Init() (zygote): 876 // LoadNativeBridge -> dlopen from cmd line parameter. 877 // | 878 // V 879 // Runtime::Start() (zygote): 880 // No-op wrt native bridge. 881 // | 882 // | start app 883 // V 884 // DidForkFromZygote(action) 885 // action = kUnload -> dlclose native bridge. 886 // action = kInitialize -> initialize library 887 // 888 // 889 // The intended flow here is, in the case of a simple dalvikvm call: 890 // 891 // Runtime::Init(): 892 // LoadNativeBridge -> dlopen from cmd line parameter. 893 // | 894 // V 895 // Runtime::Start(): 896 // DidForkFromZygote(kInitialize) -> try to initialize any native bridge given. 897 // No-op wrt native bridge. 898 is_native_bridge_loaded_ = LoadNativeBridge(options->native_bridge_library_filename_); 899 900 VLOG(startup) << "Runtime::Init exiting"; 901 return true; 902} 903 904void Runtime::InitNativeMethods() { 905 VLOG(startup) << "Runtime::InitNativeMethods entering"; 906 Thread* self = Thread::Current(); 907 JNIEnv* env = self->GetJniEnv(); 908 909 // Must be in the kNative state for calling native methods (JNI_OnLoad code). 910 CHECK_EQ(self->GetState(), kNative); 911 912 // First set up JniConstants, which is used by both the runtime's built-in native 913 // methods and libcore. 914 JniConstants::init(env); 915 WellKnownClasses::Init(env); 916 917 // Then set up the native methods provided by the runtime itself. 918 RegisterRuntimeNativeMethods(env); 919 920 // Then set up libcore, which is just a regular JNI library with a regular JNI_OnLoad. 921 // Most JNI libraries can just use System.loadLibrary, but libcore can't because it's 922 // the library that implements System.loadLibrary! 923 { 924 std::string mapped_name(StringPrintf(OS_SHARED_LIB_FORMAT_STR, "javacore")); 925 std::string reason; 926 if (!java_vm_->LoadNativeLibrary(env, mapped_name, nullptr, &reason)) { 927 LOG(FATAL) << "LoadNativeLibrary failed for \"" << mapped_name << "\": " << reason; 928 } 929 } 930 931 // Initialize well known classes that may invoke runtime native methods. 932 WellKnownClasses::LateInit(env); 933 934 VLOG(startup) << "Runtime::InitNativeMethods exiting"; 935} 936 937void Runtime::InitThreadGroups(Thread* self) { 938 JNIEnvExt* env = self->GetJniEnv(); 939 ScopedJniEnvLocalRefState env_state(env); 940 main_thread_group_ = 941 env->NewGlobalRef(env->GetStaticObjectField( 942 WellKnownClasses::java_lang_ThreadGroup, 943 WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup)); 944 CHECK(main_thread_group_ != NULL || IsCompiler()); 945 system_thread_group_ = 946 env->NewGlobalRef(env->GetStaticObjectField( 947 WellKnownClasses::java_lang_ThreadGroup, 948 WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup)); 949 CHECK(system_thread_group_ != NULL || IsCompiler()); 950} 951 952jobject Runtime::GetMainThreadGroup() const { 953 CHECK(main_thread_group_ != NULL || IsCompiler()); 954 return main_thread_group_; 955} 956 957jobject Runtime::GetSystemThreadGroup() const { 958 CHECK(system_thread_group_ != NULL || IsCompiler()); 959 return system_thread_group_; 960} 961 962jobject Runtime::GetSystemClassLoader() const { 963 CHECK(system_class_loader_ != NULL || IsCompiler()); 964 return system_class_loader_; 965} 966 967void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) { 968#define REGISTER(FN) extern void FN(JNIEnv*); FN(env) 969 // Register Throwable first so that registration of other native methods can throw exceptions 970 REGISTER(register_java_lang_Throwable); 971 REGISTER(register_dalvik_system_DexFile); 972 REGISTER(register_dalvik_system_VMDebug); 973 REGISTER(register_dalvik_system_VMRuntime); 974 REGISTER(register_dalvik_system_VMStack); 975 REGISTER(register_dalvik_system_ZygoteHooks); 976 REGISTER(register_java_lang_Class); 977 REGISTER(register_java_lang_DexCache); 978 REGISTER(register_java_lang_Object); 979 REGISTER(register_java_lang_Runtime); 980 REGISTER(register_java_lang_String); 981 REGISTER(register_java_lang_System); 982 REGISTER(register_java_lang_Thread); 983 REGISTER(register_java_lang_VMClassLoader); 984 REGISTER(register_java_lang_ref_FinalizerReference); 985 REGISTER(register_java_lang_ref_Reference); 986 REGISTER(register_java_lang_reflect_Array); 987 REGISTER(register_java_lang_reflect_Constructor); 988 REGISTER(register_java_lang_reflect_Field); 989 REGISTER(register_java_lang_reflect_Method); 990 REGISTER(register_java_lang_reflect_Proxy); 991 REGISTER(register_java_util_concurrent_atomic_AtomicLong); 992 REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmServer); 993 REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmVmInternal); 994 REGISTER(register_sun_misc_Unsafe); 995#undef REGISTER 996} 997 998void Runtime::DumpForSigQuit(std::ostream& os) { 999 GetClassLinker()->DumpForSigQuit(os); 1000 GetInternTable()->DumpForSigQuit(os); 1001 GetJavaVM()->DumpForSigQuit(os); 1002 GetHeap()->DumpForSigQuit(os); 1003 TrackedAllocators::Dump(os); 1004 os << "\n"; 1005 1006 thread_list_->DumpForSigQuit(os); 1007 BaseMutex::DumpAll(os); 1008} 1009 1010void Runtime::DumpLockHolders(std::ostream& os) { 1011 uint64_t mutator_lock_owner = Locks::mutator_lock_->GetExclusiveOwnerTid(); 1012 pid_t thread_list_lock_owner = GetThreadList()->GetLockOwner(); 1013 pid_t classes_lock_owner = GetClassLinker()->GetClassesLockOwner(); 1014 pid_t dex_lock_owner = GetClassLinker()->GetDexLockOwner(); 1015 if ((thread_list_lock_owner | classes_lock_owner | dex_lock_owner) != 0) { 1016 os << "Mutator lock exclusive owner tid: " << mutator_lock_owner << "\n" 1017 << "ThreadList lock owner tid: " << thread_list_lock_owner << "\n" 1018 << "ClassLinker classes lock owner tid: " << classes_lock_owner << "\n" 1019 << "ClassLinker dex lock owner tid: " << dex_lock_owner << "\n"; 1020 } 1021} 1022 1023void Runtime::SetStatsEnabled(bool new_state) { 1024 Thread* self = Thread::Current(); 1025 MutexLock mu(self, *Locks::instrument_entrypoints_lock_); 1026 if (new_state == true) { 1027 GetStats()->Clear(~0); 1028 // TODO: wouldn't it make more sense to clear _all_ threads' stats? 1029 self->GetStats()->Clear(~0); 1030 if (stats_enabled_ != new_state) { 1031 GetInstrumentation()->InstrumentQuickAllocEntryPointsLocked(); 1032 } 1033 } else if (stats_enabled_ != new_state) { 1034 GetInstrumentation()->UninstrumentQuickAllocEntryPointsLocked(); 1035 } 1036 stats_enabled_ = new_state; 1037} 1038 1039void Runtime::ResetStats(int kinds) { 1040 GetStats()->Clear(kinds & 0xffff); 1041 // TODO: wouldn't it make more sense to clear _all_ threads' stats? 1042 Thread::Current()->GetStats()->Clear(kinds >> 16); 1043} 1044 1045int32_t Runtime::GetStat(int kind) { 1046 RuntimeStats* stats; 1047 if (kind < (1<<16)) { 1048 stats = GetStats(); 1049 } else { 1050 stats = Thread::Current()->GetStats(); 1051 kind >>= 16; 1052 } 1053 switch (kind) { 1054 case KIND_ALLOCATED_OBJECTS: 1055 return stats->allocated_objects; 1056 case KIND_ALLOCATED_BYTES: 1057 return stats->allocated_bytes; 1058 case KIND_FREED_OBJECTS: 1059 return stats->freed_objects; 1060 case KIND_FREED_BYTES: 1061 return stats->freed_bytes; 1062 case KIND_GC_INVOCATIONS: 1063 return stats->gc_for_alloc_count; 1064 case KIND_CLASS_INIT_COUNT: 1065 return stats->class_init_count; 1066 case KIND_CLASS_INIT_TIME: 1067 // Convert ns to us, reduce to 32 bits. 1068 return static_cast<int>(stats->class_init_time_ns / 1000); 1069 case KIND_EXT_ALLOCATED_OBJECTS: 1070 case KIND_EXT_ALLOCATED_BYTES: 1071 case KIND_EXT_FREED_OBJECTS: 1072 case KIND_EXT_FREED_BYTES: 1073 return 0; // backward compatibility 1074 default: 1075 LOG(FATAL) << "Unknown statistic " << kind; 1076 return -1; // unreachable 1077 } 1078} 1079 1080void Runtime::BlockSignals() { 1081 SignalSet signals; 1082 signals.Add(SIGPIPE); 1083 // SIGQUIT is used to dump the runtime's state (including stack traces). 1084 signals.Add(SIGQUIT); 1085 // SIGUSR1 is used to initiate a GC. 1086 signals.Add(SIGUSR1); 1087 signals.Block(); 1088} 1089 1090bool Runtime::AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group, 1091 bool create_peer) { 1092 return Thread::Attach(thread_name, as_daemon, thread_group, create_peer) != NULL; 1093} 1094 1095void Runtime::DetachCurrentThread() { 1096 Thread* self = Thread::Current(); 1097 if (self == NULL) { 1098 LOG(FATAL) << "attempting to detach thread that is not attached"; 1099 } 1100 if (self->HasManagedStack()) { 1101 LOG(FATAL) << *Thread::Current() << " attempting to detach while still running code"; 1102 } 1103 thread_list_->Unregister(self); 1104} 1105 1106mirror::Throwable* Runtime::GetPreAllocatedOutOfMemoryError() { 1107 mirror::Throwable* oome = pre_allocated_OutOfMemoryError_.Read(); 1108 if (oome == nullptr) { 1109 LOG(ERROR) << "Failed to return pre-allocated OOME"; 1110 } 1111 return oome; 1112} 1113 1114mirror::Throwable* Runtime::GetPreAllocatedNoClassDefFoundError() { 1115 mirror::Throwable* ncdfe = pre_allocated_NoClassDefFoundError_.Read(); 1116 if (ncdfe == nullptr) { 1117 LOG(ERROR) << "Failed to return pre-allocated NoClassDefFoundError"; 1118 } 1119 return ncdfe; 1120} 1121 1122void Runtime::VisitConstantRoots(RootCallback* callback, void* arg) { 1123 // Visit the classes held as static in mirror classes, these can be visited concurrently and only 1124 // need to be visited once per GC since they never change. 1125 mirror::ArtField::VisitRoots(callback, arg); 1126 mirror::ArtMethod::VisitRoots(callback, arg); 1127 mirror::Class::VisitRoots(callback, arg); 1128 mirror::Reference::VisitRoots(callback, arg); 1129 mirror::StackTraceElement::VisitRoots(callback, arg); 1130 mirror::String::VisitRoots(callback, arg); 1131 mirror::Throwable::VisitRoots(callback, arg); 1132 // Visit all the primitive array types classes. 1133 mirror::PrimitiveArray<uint8_t>::VisitRoots(callback, arg); // BooleanArray 1134 mirror::PrimitiveArray<int8_t>::VisitRoots(callback, arg); // ByteArray 1135 mirror::PrimitiveArray<uint16_t>::VisitRoots(callback, arg); // CharArray 1136 mirror::PrimitiveArray<double>::VisitRoots(callback, arg); // DoubleArray 1137 mirror::PrimitiveArray<float>::VisitRoots(callback, arg); // FloatArray 1138 mirror::PrimitiveArray<int32_t>::VisitRoots(callback, arg); // IntArray 1139 mirror::PrimitiveArray<int64_t>::VisitRoots(callback, arg); // LongArray 1140 mirror::PrimitiveArray<int16_t>::VisitRoots(callback, arg); // ShortArray 1141} 1142 1143void Runtime::VisitConcurrentRoots(RootCallback* callback, void* arg, VisitRootFlags flags) { 1144 intern_table_->VisitRoots(callback, arg, flags); 1145 class_linker_->VisitRoots(callback, arg, flags); 1146 if ((flags & kVisitRootFlagNewRoots) == 0) { 1147 // Guaranteed to have no new roots in the constant roots. 1148 VisitConstantRoots(callback, arg); 1149 } 1150} 1151 1152void Runtime::VisitNonThreadRoots(RootCallback* callback, void* arg) { 1153 java_vm_->VisitRoots(callback, arg); 1154 if (!sentinel_.IsNull()) { 1155 sentinel_.VisitRoot(callback, arg, 0, kRootVMInternal); 1156 DCHECK(!sentinel_.IsNull()); 1157 } 1158 if (!pre_allocated_OutOfMemoryError_.IsNull()) { 1159 pre_allocated_OutOfMemoryError_.VisitRoot(callback, arg, 0, kRootVMInternal); 1160 DCHECK(!pre_allocated_OutOfMemoryError_.IsNull()); 1161 } 1162 resolution_method_.VisitRoot(callback, arg, 0, kRootVMInternal); 1163 DCHECK(!resolution_method_.IsNull()); 1164 if (!pre_allocated_NoClassDefFoundError_.IsNull()) { 1165 pre_allocated_NoClassDefFoundError_.VisitRoot(callback, arg, 0, kRootVMInternal); 1166 DCHECK(!pre_allocated_NoClassDefFoundError_.IsNull()); 1167 } 1168 if (HasImtConflictMethod()) { 1169 imt_conflict_method_.VisitRoot(callback, arg, 0, kRootVMInternal); 1170 } 1171 if (HasDefaultImt()) { 1172 default_imt_.VisitRoot(callback, arg, 0, kRootVMInternal); 1173 } 1174 for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) { 1175 if (!callee_save_methods_[i].IsNull()) { 1176 callee_save_methods_[i].VisitRoot(callback, arg, 0, kRootVMInternal); 1177 } 1178 } 1179 verifier::MethodVerifier::VisitStaticRoots(callback, arg); 1180 { 1181 MutexLock mu(Thread::Current(), method_verifier_lock_); 1182 for (verifier::MethodVerifier* verifier : method_verifiers_) { 1183 verifier->VisitRoots(callback, arg); 1184 } 1185 } 1186 if (preinitialization_transaction_ != nullptr) { 1187 preinitialization_transaction_->VisitRoots(callback, arg); 1188 } 1189 instrumentation_.VisitRoots(callback, arg); 1190} 1191 1192void Runtime::VisitNonConcurrentRoots(RootCallback* callback, void* arg) { 1193 thread_list_->VisitRoots(callback, arg); 1194 VisitNonThreadRoots(callback, arg); 1195} 1196 1197void Runtime::VisitRoots(RootCallback* callback, void* arg, VisitRootFlags flags) { 1198 VisitNonConcurrentRoots(callback, arg); 1199 VisitConcurrentRoots(callback, arg, flags); 1200} 1201 1202mirror::ObjectArray<mirror::ArtMethod>* Runtime::CreateDefaultImt(ClassLinker* cl) { 1203 Thread* self = Thread::Current(); 1204 StackHandleScope<1> hs(self); 1205 Handle<mirror::ObjectArray<mirror::ArtMethod>> imtable( 1206 hs.NewHandle(cl->AllocArtMethodArray(self, 64))); 1207 mirror::ArtMethod* imt_conflict_method = Runtime::Current()->GetImtConflictMethod(); 1208 for (size_t i = 0; i < static_cast<size_t>(imtable->GetLength()); i++) { 1209 imtable->Set<false>(i, imt_conflict_method); 1210 } 1211 return imtable.Get(); 1212} 1213 1214mirror::ArtMethod* Runtime::CreateImtConflictMethod() { 1215 Thread* self = Thread::Current(); 1216 Runtime* runtime = Runtime::Current(); 1217 ClassLinker* class_linker = runtime->GetClassLinker(); 1218 StackHandleScope<1> hs(self); 1219 Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self))); 1220 method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod()); 1221 // TODO: use a special method for imt conflict method saves. 1222 method->SetDexMethodIndex(DexFile::kDexNoIndex); 1223 // When compiling, the code pointer will get set later when the image is loaded. 1224 if (runtime->IsCompiler()) { 1225 method->SetEntryPointFromPortableCompiledCode(nullptr); 1226 method->SetEntryPointFromQuickCompiledCode(nullptr); 1227 } else { 1228 method->SetEntryPointFromPortableCompiledCode(GetPortableImtConflictStub()); 1229 method->SetEntryPointFromQuickCompiledCode(GetQuickImtConflictStub()); 1230 } 1231 return method.Get(); 1232} 1233 1234mirror::ArtMethod* Runtime::CreateResolutionMethod() { 1235 Thread* self = Thread::Current(); 1236 Runtime* runtime = Runtime::Current(); 1237 ClassLinker* class_linker = runtime->GetClassLinker(); 1238 StackHandleScope<1> hs(self); 1239 Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self))); 1240 method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod()); 1241 // TODO: use a special method for resolution method saves 1242 method->SetDexMethodIndex(DexFile::kDexNoIndex); 1243 // When compiling, the code pointer will get set later when the image is loaded. 1244 if (runtime->IsCompiler()) { 1245 method->SetEntryPointFromPortableCompiledCode(nullptr); 1246 method->SetEntryPointFromQuickCompiledCode(nullptr); 1247 } else { 1248 method->SetEntryPointFromPortableCompiledCode(GetPortableResolutionStub()); 1249 method->SetEntryPointFromQuickCompiledCode(GetQuickResolutionStub()); 1250 } 1251 return method.Get(); 1252} 1253 1254mirror::ArtMethod* Runtime::CreateCalleeSaveMethod(CalleeSaveType type) { 1255 Thread* self = Thread::Current(); 1256 Runtime* runtime = Runtime::Current(); 1257 ClassLinker* class_linker = runtime->GetClassLinker(); 1258 StackHandleScope<1> hs(self); 1259 Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self))); 1260 method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod()); 1261 // TODO: use a special method for callee saves 1262 method->SetDexMethodIndex(DexFile::kDexNoIndex); 1263 method->SetEntryPointFromPortableCompiledCode(nullptr); 1264 method->SetEntryPointFromQuickCompiledCode(nullptr); 1265 DCHECK_NE(instruction_set_, kNone); 1266 return method.Get(); 1267} 1268 1269void Runtime::DisallowNewSystemWeaks() { 1270 monitor_list_->DisallowNewMonitors(); 1271 intern_table_->DisallowNewInterns(); 1272 java_vm_->DisallowNewWeakGlobals(); 1273} 1274 1275void Runtime::AllowNewSystemWeaks() { 1276 monitor_list_->AllowNewMonitors(); 1277 intern_table_->AllowNewInterns(); 1278 java_vm_->AllowNewWeakGlobals(); 1279} 1280 1281void Runtime::SetInstructionSet(InstructionSet instruction_set) { 1282 instruction_set_ = instruction_set; 1283 if ((instruction_set_ == kThumb2) || (instruction_set_ == kArm)) { 1284 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1285 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1286 callee_save_method_frame_infos_[i] = arm::ArmCalleeSaveMethodFrameInfo(type); 1287 } 1288 } else if (instruction_set_ == kMips) { 1289 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1290 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1291 callee_save_method_frame_infos_[i] = mips::MipsCalleeSaveMethodFrameInfo(type); 1292 } 1293 } else if (instruction_set_ == kX86) { 1294 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1295 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1296 callee_save_method_frame_infos_[i] = x86::X86CalleeSaveMethodFrameInfo(type); 1297 } 1298 } else if (instruction_set_ == kX86_64) { 1299 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1300 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1301 callee_save_method_frame_infos_[i] = x86_64::X86_64CalleeSaveMethodFrameInfo(type); 1302 } 1303 } else if (instruction_set_ == kArm64) { 1304 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1305 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1306 callee_save_method_frame_infos_[i] = arm64::Arm64CalleeSaveMethodFrameInfo(type); 1307 } 1308 } else { 1309 UNIMPLEMENTED(FATAL) << instruction_set_; 1310 } 1311} 1312 1313void Runtime::SetCalleeSaveMethod(mirror::ArtMethod* method, CalleeSaveType type) { 1314 DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastCalleeSaveType)); 1315 callee_save_methods_[type] = GcRoot<mirror::ArtMethod>(method); 1316} 1317 1318const std::vector<const DexFile*>& Runtime::GetCompileTimeClassPath(jobject class_loader) { 1319 if (class_loader == NULL) { 1320 return GetClassLinker()->GetBootClassPath(); 1321 } 1322 CHECK(UseCompileTimeClassPath()); 1323 CompileTimeClassPaths::const_iterator it = compile_time_class_paths_.find(class_loader); 1324 CHECK(it != compile_time_class_paths_.end()); 1325 return it->second; 1326} 1327 1328void Runtime::SetCompileTimeClassPath(jobject class_loader, 1329 std::vector<const DexFile*>& class_path) { 1330 CHECK(!IsStarted()); 1331 use_compile_time_class_path_ = true; 1332 compile_time_class_paths_.Put(class_loader, class_path); 1333} 1334 1335void Runtime::AddMethodVerifier(verifier::MethodVerifier* verifier) { 1336 DCHECK(verifier != nullptr); 1337 MutexLock mu(Thread::Current(), method_verifier_lock_); 1338 method_verifiers_.insert(verifier); 1339} 1340 1341void Runtime::RemoveMethodVerifier(verifier::MethodVerifier* verifier) { 1342 DCHECK(verifier != nullptr); 1343 MutexLock mu(Thread::Current(), method_verifier_lock_); 1344 auto it = method_verifiers_.find(verifier); 1345 CHECK(it != method_verifiers_.end()); 1346 method_verifiers_.erase(it); 1347} 1348 1349void Runtime::StartProfiler(const char* profile_output_filename) { 1350 profile_output_filename_ = profile_output_filename; 1351 profiler_started_ = 1352 BackgroundMethodSamplingProfiler::Start(profile_output_filename_, profiler_options_); 1353} 1354 1355// Transaction support. 1356void Runtime::EnterTransactionMode(Transaction* transaction) { 1357 DCHECK(IsCompiler()); 1358 DCHECK(transaction != nullptr); 1359 DCHECK(!IsActiveTransaction()); 1360 preinitialization_transaction_ = transaction; 1361} 1362 1363void Runtime::ExitTransactionMode() { 1364 DCHECK(IsCompiler()); 1365 DCHECK(IsActiveTransaction()); 1366 preinitialization_transaction_ = nullptr; 1367} 1368 1369void Runtime::RecordWriteFieldBoolean(mirror::Object* obj, MemberOffset field_offset, 1370 uint8_t value, bool is_volatile) const { 1371 DCHECK(IsCompiler()); 1372 DCHECK(IsActiveTransaction()); 1373 preinitialization_transaction_->RecordWriteFieldBoolean(obj, field_offset, value, is_volatile); 1374} 1375 1376void Runtime::RecordWriteFieldByte(mirror::Object* obj, MemberOffset field_offset, 1377 int8_t value, bool is_volatile) const { 1378 DCHECK(IsCompiler()); 1379 DCHECK(IsActiveTransaction()); 1380 preinitialization_transaction_->RecordWriteFieldByte(obj, field_offset, value, is_volatile); 1381} 1382 1383void Runtime::RecordWriteFieldChar(mirror::Object* obj, MemberOffset field_offset, 1384 uint16_t value, bool is_volatile) const { 1385 DCHECK(IsCompiler()); 1386 DCHECK(IsActiveTransaction()); 1387 preinitialization_transaction_->RecordWriteFieldChar(obj, field_offset, value, is_volatile); 1388} 1389 1390void Runtime::RecordWriteFieldShort(mirror::Object* obj, MemberOffset field_offset, 1391 int16_t value, bool is_volatile) const { 1392 DCHECK(IsCompiler()); 1393 DCHECK(IsActiveTransaction()); 1394 preinitialization_transaction_->RecordWriteFieldShort(obj, field_offset, value, is_volatile); 1395} 1396 1397void Runtime::RecordWriteField32(mirror::Object* obj, MemberOffset field_offset, 1398 uint32_t value, bool is_volatile) const { 1399 DCHECK(IsCompiler()); 1400 DCHECK(IsActiveTransaction()); 1401 preinitialization_transaction_->RecordWriteField32(obj, field_offset, value, is_volatile); 1402} 1403 1404void Runtime::RecordWriteField64(mirror::Object* obj, MemberOffset field_offset, 1405 uint64_t value, bool is_volatile) const { 1406 DCHECK(IsCompiler()); 1407 DCHECK(IsActiveTransaction()); 1408 preinitialization_transaction_->RecordWriteField64(obj, field_offset, value, is_volatile); 1409} 1410 1411void Runtime::RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset, 1412 mirror::Object* value, bool is_volatile) const { 1413 DCHECK(IsCompiler()); 1414 DCHECK(IsActiveTransaction()); 1415 preinitialization_transaction_->RecordWriteFieldReference(obj, field_offset, value, is_volatile); 1416} 1417 1418void Runtime::RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const { 1419 DCHECK(IsCompiler()); 1420 DCHECK(IsActiveTransaction()); 1421 preinitialization_transaction_->RecordWriteArray(array, index, value); 1422} 1423 1424void Runtime::RecordStrongStringInsertion(mirror::String* s) const { 1425 DCHECK(IsCompiler()); 1426 DCHECK(IsActiveTransaction()); 1427 preinitialization_transaction_->RecordStrongStringInsertion(s); 1428} 1429 1430void Runtime::RecordWeakStringInsertion(mirror::String* s) const { 1431 DCHECK(IsCompiler()); 1432 DCHECK(IsActiveTransaction()); 1433 preinitialization_transaction_->RecordWeakStringInsertion(s); 1434} 1435 1436void Runtime::RecordStrongStringRemoval(mirror::String* s) const { 1437 DCHECK(IsCompiler()); 1438 DCHECK(IsActiveTransaction()); 1439 preinitialization_transaction_->RecordStrongStringRemoval(s); 1440} 1441 1442void Runtime::RecordWeakStringRemoval(mirror::String* s) const { 1443 DCHECK(IsCompiler()); 1444 DCHECK(IsActiveTransaction()); 1445 preinitialization_transaction_->RecordWeakStringRemoval(s); 1446} 1447 1448void Runtime::SetFaultMessage(const std::string& message) { 1449 MutexLock mu(Thread::Current(), fault_message_lock_); 1450 fault_message_ = message; 1451} 1452 1453void Runtime::AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* argv) 1454 const { 1455 if (GetInstrumentation()->InterpretOnly()) { 1456 argv->push_back("--compiler-filter=interpret-only"); 1457 } 1458 1459 // Make the dex2oat instruction set match that of the launching runtime. If we have multiple 1460 // architecture support, dex2oat may be compiled as a different instruction-set than that 1461 // currently being executed. 1462 std::string instruction_set("--instruction-set="); 1463 instruction_set += GetInstructionSetString(kRuntimeISA); 1464 argv->push_back(instruction_set); 1465 1466 std::unique_ptr<const InstructionSetFeatures> features(InstructionSetFeatures::FromCppDefines()); 1467 std::string feature_string("--instruction-set-features="); 1468 feature_string += features->GetFeatureString(); 1469 argv->push_back(feature_string); 1470} 1471 1472void Runtime::UpdateProfilerState(int state) { 1473 VLOG(profiler) << "Profiler state updated to " << state; 1474} 1475} // namespace art 1476