runtime.cc revision 3256166df40981f1f1997a5f00303712277c963f
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 "atomic.h" 47#include "class_linker.h" 48#include "debugger.h" 49#include "elf_file.h" 50#include "fault_handler.h" 51#include "gc/accounting/card_table-inl.h" 52#include "gc/heap.h" 53#include "gc/space/image_space.h" 54#include "gc/space/space.h" 55#include "image.h" 56#include "instrumentation.h" 57#include "intern_table.h" 58#include "jni_internal.h" 59#include "mirror/art_field-inl.h" 60#include "mirror/art_method-inl.h" 61#include "mirror/array.h" 62#include "mirror/class-inl.h" 63#include "mirror/class_loader.h" 64#include "mirror/stack_trace_element.h" 65#include "mirror/throwable.h" 66#include "monitor.h" 67#include "native_bridge_art_interface.h" 68#include "parsed_options.h" 69#include "oat_file.h" 70#include "os.h" 71#include "quick/quick_method_frame_info.h" 72#include "reflection.h" 73#include "ScopedLocalRef.h" 74#include "scoped_thread_state_change.h" 75#include "signal_catcher.h" 76#include "signal_set.h" 77#include "handle_scope-inl.h" 78#include "thread.h" 79#include "thread_list.h" 80#include "trace.h" 81#include "transaction.h" 82#include "profiler.h" 83#include "verifier/method_verifier.h" 84#include "well_known_classes.h" 85 86#include "JniConstants.h" // Last to avoid LOG redefinition in ics-mr1-plus-art. 87 88#ifdef HAVE_ANDROID_OS 89#include "cutils/properties.h" 90#endif 91 92namespace art { 93 94static constexpr bool kEnableJavaStackTraceHandler = true; 95const char* Runtime::kDefaultInstructionSetFeatures = 96 STRINGIFY(ART_DEFAULT_INSTRUCTION_SET_FEATURES); 97Runtime* Runtime::instance_ = NULL; 98 99Runtime::Runtime() 100 : instruction_set_(kNone), 101 compiler_callbacks_(nullptr), 102 is_zygote_(false), 103 must_relocate_(false), 104 is_concurrent_gc_enabled_(true), 105 is_explicit_gc_disabled_(false), 106 dex2oat_enabled_(true), 107 image_dex2oat_enabled_(true), 108 default_stack_size_(0), 109 heap_(nullptr), 110 max_spins_before_thin_lock_inflation_(Monitor::kDefaultMaxSpinsBeforeThinLockInflation), 111 monitor_list_(nullptr), 112 monitor_pool_(nullptr), 113 thread_list_(nullptr), 114 intern_table_(nullptr), 115 class_linker_(nullptr), 116 signal_catcher_(nullptr), 117 java_vm_(nullptr), 118 fault_message_lock_("Fault message lock"), 119 fault_message_(""), 120 method_verifier_lock_("Method verifiers lock"), 121 threads_being_born_(0), 122 shutdown_cond_(new ConditionVariable("Runtime shutdown", *Locks::runtime_shutdown_lock_)), 123 shutting_down_(false), 124 shutting_down_started_(false), 125 started_(false), 126 finished_starting_(false), 127 vfprintf_(nullptr), 128 exit_(nullptr), 129 abort_(nullptr), 130 stats_enabled_(false), 131 running_on_valgrind_(RUNNING_ON_VALGRIND > 0), 132 profiler_started_(false), 133 method_trace_(false), 134 method_trace_file_size_(0), 135 instrumentation_(), 136 use_compile_time_class_path_(false), 137 main_thread_group_(nullptr), 138 system_thread_group_(nullptr), 139 system_class_loader_(nullptr), 140 dump_gc_performance_on_shutdown_(false), 141 preinitialization_transaction_(nullptr), 142 null_pointer_handler_(nullptr), 143 suspend_handler_(nullptr), 144 stack_overflow_handler_(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 native_bridge_art_callbacks_({GetMethodShorty, GetNativeMethodCount, GetNativeMethods}) { 151} 152 153Runtime::~Runtime() { 154 if (dump_gc_performance_on_shutdown_) { 155 // This can't be called from the Heap destructor below because it 156 // could call RosAlloc::InspectAll() which needs the thread_list 157 // to be still alive. 158 heap_->DumpGcPerformanceInfo(LOG(INFO)); 159 } 160 161 Thread* self = Thread::Current(); 162 { 163 MutexLock mu(self, *Locks::runtime_shutdown_lock_); 164 shutting_down_started_ = true; 165 while (threads_being_born_ > 0) { 166 shutdown_cond_->Wait(self); 167 } 168 shutting_down_ = true; 169 } 170 // Shut down background profiler before the runtime exits. 171 if (profiler_started_) { 172 BackgroundMethodSamplingProfiler::Shutdown(); 173 } 174 175 // Shutdown the fault manager if it was initialized. 176 fault_manager.Shutdown(); 177 178 Trace::Shutdown(); 179 180 // Make sure to let the GC complete if it is running. 181 heap_->WaitForGcToComplete(gc::kGcCauseBackground, self); 182 heap_->DeleteThreadPool(); 183 184 // Make sure our internal threads are dead before we start tearing down things they're using. 185 Dbg::StopJdwp(); 186 delete signal_catcher_; 187 188 // Make sure all other non-daemon threads have terminated, and all daemon threads are suspended. 189 delete thread_list_; 190 delete monitor_list_; 191 delete monitor_pool_; 192 delete class_linker_; 193 delete heap_; 194 delete intern_table_; 195 delete java_vm_; 196 Thread::Shutdown(); 197 QuasiAtomic::Shutdown(); 198 verifier::MethodVerifier::Shutdown(); 199 // TODO: acquire a static mutex on Runtime to avoid racing. 200 CHECK(instance_ == nullptr || instance_ == this); 201 instance_ = nullptr; 202 203 delete null_pointer_handler_; 204 delete suspend_handler_; 205 delete stack_overflow_handler_; 206} 207 208struct AbortState { 209 void Dump(std::ostream& os) NO_THREAD_SAFETY_ANALYSIS { 210 if (gAborting > 1) { 211 os << "Runtime aborting --- recursively, so no thread-specific detail!\n"; 212 return; 213 } 214 gAborting++; 215 os << "Runtime aborting...\n"; 216 if (Runtime::Current() == NULL) { 217 os << "(Runtime does not yet exist!)\n"; 218 return; 219 } 220 Thread* self = Thread::Current(); 221 if (self == nullptr) { 222 os << "(Aborting thread was not attached to runtime!)\n"; 223 DumpKernelStack(os, GetTid(), " kernel: ", false); 224 DumpNativeStack(os, GetTid(), " native: ", nullptr); 225 } else { 226 os << "Aborting thread:\n"; 227 if (Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)) { 228 DumpThread(os, self); 229 } else { 230 if (Locks::mutator_lock_->SharedTryLock(self)) { 231 DumpThread(os, self); 232 Locks::mutator_lock_->SharedUnlock(self); 233 } 234 } 235 } 236 DumpAllThreads(os, self); 237 } 238 239 void DumpThread(std::ostream& os, Thread* self) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 240 self->Dump(os); 241 if (self->IsExceptionPending()) { 242 ThrowLocation throw_location; 243 mirror::Throwable* exception = self->GetException(&throw_location); 244 os << "Pending exception " << PrettyTypeOf(exception) 245 << " thrown by '" << throw_location.Dump() << "'\n" 246 << exception->Dump(); 247 } 248 } 249 250 void DumpAllThreads(std::ostream& os, Thread* self) NO_THREAD_SAFETY_ANALYSIS { 251 Runtime* runtime = Runtime::Current(); 252 if (runtime != nullptr) { 253 ThreadList* thread_list = runtime->GetThreadList(); 254 if (thread_list != nullptr) { 255 bool tll_already_held = Locks::thread_list_lock_->IsExclusiveHeld(self); 256 bool ml_already_held = Locks::mutator_lock_->IsSharedHeld(self); 257 if (!tll_already_held || !ml_already_held) { 258 os << "Dumping all threads without appropriate locks held:" 259 << (!tll_already_held ? " thread list lock" : "") 260 << (!ml_already_held ? " mutator lock" : "") 261 << "\n"; 262 } 263 os << "All threads:\n"; 264 thread_list->DumpLocked(os); 265 } 266 } 267 } 268}; 269 270void Runtime::Abort() { 271 gAborting++; // set before taking any locks 272 273 // Ensure that we don't have multiple threads trying to abort at once, 274 // which would result in significantly worse diagnostics. 275 MutexLock mu(Thread::Current(), *Locks::abort_lock_); 276 277 // Get any pending output out of the way. 278 fflush(NULL); 279 280 // Many people have difficulty distinguish aborts from crashes, 281 // so be explicit. 282 AbortState state; 283 LOG(INTERNAL_FATAL) << Dumpable<AbortState>(state); 284 285 // Call the abort hook if we have one. 286 if (Runtime::Current() != NULL && Runtime::Current()->abort_ != NULL) { 287 LOG(INTERNAL_FATAL) << "Calling abort hook..."; 288 Runtime::Current()->abort_(); 289 // notreached 290 LOG(INTERNAL_FATAL) << "Unexpectedly returned from abort hook!"; 291 } 292 293#if defined(__GLIBC__) 294 // TODO: we ought to be able to use pthread_kill(3) here (or abort(3), 295 // which POSIX defines in terms of raise(3), which POSIX defines in terms 296 // of pthread_kill(3)). On Linux, though, libcorkscrew can't unwind through 297 // libpthread, which means the stacks we dump would be useless. Calling 298 // tgkill(2) directly avoids that. 299 syscall(__NR_tgkill, getpid(), GetTid(), SIGABRT); 300 // TODO: LLVM installs it's own SIGABRT handler so exit to be safe... Can we disable that in LLVM? 301 // If not, we could use sigaction(3) before calling tgkill(2) and lose this call to exit(3). 302 exit(1); 303#else 304 abort(); 305#endif 306 // notreached 307} 308 309void Runtime::PreZygoteFork() { 310 heap_->PreZygoteFork(); 311} 312 313void Runtime::CallExitHook(jint status) { 314 if (exit_ != NULL) { 315 ScopedThreadStateChange tsc(Thread::Current(), kNative); 316 exit_(status); 317 LOG(WARNING) << "Exit hook returned instead of exiting!"; 318 } 319} 320 321void Runtime::SweepSystemWeaks(IsMarkedCallback* visitor, void* arg) { 322 GetInternTable()->SweepInternTableWeaks(visitor, arg); 323 GetMonitorList()->SweepMonitorList(visitor, arg); 324 GetJavaVM()->SweepJniWeakGlobals(visitor, arg); 325} 326 327bool Runtime::Create(const RuntimeOptions& options, bool ignore_unrecognized) { 328 // TODO: acquire a static mutex on Runtime to avoid racing. 329 if (Runtime::instance_ != NULL) { 330 return false; 331 } 332 InitLogging(NULL); // Calls Locks::Init() as a side effect. 333 instance_ = new Runtime; 334 if (!instance_->Init(options, ignore_unrecognized)) { 335 delete instance_; 336 instance_ = NULL; 337 return false; 338 } 339 return true; 340} 341 342jobject CreateSystemClassLoader() { 343 if (Runtime::Current()->UseCompileTimeClassPath()) { 344 return NULL; 345 } 346 347 ScopedObjectAccess soa(Thread::Current()); 348 ClassLinker* cl = Runtime::Current()->GetClassLinker(); 349 350 StackHandleScope<3> hs(soa.Self()); 351 Handle<mirror::Class> class_loader_class( 352 hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_ClassLoader))); 353 CHECK(cl->EnsureInitialized(class_loader_class, true, true)); 354 355 mirror::ArtMethod* getSystemClassLoader = 356 class_loader_class->FindDirectMethod("getSystemClassLoader", "()Ljava/lang/ClassLoader;"); 357 CHECK(getSystemClassLoader != NULL); 358 359 JValue result = InvokeWithJValues(soa, nullptr, soa.EncodeMethod(getSystemClassLoader), nullptr); 360 Handle<mirror::ClassLoader> class_loader( 361 hs.NewHandle(down_cast<mirror::ClassLoader*>(result.GetL()))); 362 CHECK(class_loader.Get() != nullptr); 363 JNIEnv* env = soa.Self()->GetJniEnv(); 364 ScopedLocalRef<jobject> system_class_loader(env, 365 soa.AddLocalReference<jobject>(class_loader.Get())); 366 CHECK(system_class_loader.get() != nullptr); 367 368 soa.Self()->SetClassLoaderOverride(class_loader.Get()); 369 370 Handle<mirror::Class> thread_class( 371 hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_Thread))); 372 CHECK(cl->EnsureInitialized(thread_class, true, true)); 373 374 mirror::ArtField* contextClassLoader = 375 thread_class->FindDeclaredInstanceField("contextClassLoader", "Ljava/lang/ClassLoader;"); 376 CHECK(contextClassLoader != NULL); 377 378 // We can't run in a transaction yet. 379 contextClassLoader->SetObject<false>(soa.Self()->GetPeer(), class_loader.Get()); 380 381 return env->NewGlobalRef(system_class_loader.get()); 382} 383 384std::string Runtime::GetPatchoatExecutable() const { 385 if (!patchoat_executable_.empty()) { 386 return patchoat_executable_; 387 } 388 std::string patchoat_executable_(GetAndroidRoot()); 389 patchoat_executable_ += (kIsDebugBuild ? "/bin/patchoatd" : "/bin/patchoat"); 390 return patchoat_executable_; 391} 392 393std::string Runtime::GetCompilerExecutable() const { 394 if (!compiler_executable_.empty()) { 395 return compiler_executable_; 396 } 397 std::string compiler_executable(GetAndroidRoot()); 398 compiler_executable += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat"); 399 return compiler_executable; 400} 401 402bool Runtime::Start() { 403 VLOG(startup) << "Runtime::Start entering"; 404 405 // Restore main thread state to kNative as expected by native code. 406 Thread* self = Thread::Current(); 407 408 self->TransitionFromRunnableToSuspended(kNative); 409 410 started_ = true; 411 412 if (!IsImageDex2OatEnabled() || !Runtime::Current()->GetHeap()->HasImageSpace()) { 413 ScopedObjectAccess soa(Thread::Current()); 414 StackHandleScope<1> hs(soa.Self()); 415 auto klass(hs.NewHandle<mirror::Class>(mirror::Class::GetJavaLangClass())); 416 class_linker_->EnsureInitialized(klass, true, true); 417 } 418 419 // InitNativeMethods needs to be after started_ so that the classes 420 // it touches will have methods linked to the oat file if necessary. 421 InitNativeMethods(); 422 423 // Initialize well known thread group values that may be accessed threads while attaching. 424 InitThreadGroups(self); 425 426 Thread::FinishStartup(); 427 428 if (is_zygote_) { 429 if (!InitZygote()) { 430 return false; 431 } 432 } else { 433 DidForkFromZygote(NativeBridgeAction::kInitialize); 434 } 435 436 StartDaemonThreads(); 437 438 system_class_loader_ = CreateSystemClassLoader(); 439 440 { 441 ScopedObjectAccess soa(self); 442 self->GetJniEnv()->locals.AssertEmpty(); 443 } 444 445 VLOG(startup) << "Runtime::Start exiting"; 446 finished_starting_ = true; 447 448 if (profiler_options_.IsEnabled() && !profile_output_filename_.empty()) { 449 // User has asked for a profile using -Xenable-profiler. 450 // Create the profile file if it doesn't exist. 451 int fd = open(profile_output_filename_.c_str(), O_RDWR|O_CREAT|O_EXCL, 0660); 452 if (fd >= 0) { 453 close(fd); 454 } else if (errno != EEXIST) { 455 LOG(INFO) << "Failed to access the profile file. Profiler disabled."; 456 return true; 457 } 458 StartProfiler(profile_output_filename_.c_str()); 459 } 460 461 return true; 462} 463 464void Runtime::EndThreadBirth() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) { 465 DCHECK_GT(threads_being_born_, 0U); 466 threads_being_born_--; 467 if (shutting_down_started_ && threads_being_born_ == 0) { 468 shutdown_cond_->Broadcast(Thread::Current()); 469 } 470} 471 472// Do zygote-mode-only initialization. 473bool Runtime::InitZygote() { 474#ifdef __linux__ 475 // zygote goes into its own process group 476 setpgid(0, 0); 477 478 // See storage config details at http://source.android.com/tech/storage/ 479 // Create private mount namespace shared by all children 480 if (unshare(CLONE_NEWNS) == -1) { 481 PLOG(WARNING) << "Failed to unshare()"; 482 return false; 483 } 484 485 // Mark rootfs as being a slave so that changes from default 486 // namespace only flow into our children. 487 if (mount("rootfs", "/", NULL, (MS_SLAVE | MS_REC), NULL) == -1) { 488 PLOG(WARNING) << "Failed to mount() rootfs as MS_SLAVE"; 489 return false; 490 } 491 492 // Create a staging tmpfs that is shared by our children; they will 493 // bind mount storage into their respective private namespaces, which 494 // are isolated from each other. 495 const char* target_base = getenv("EMULATED_STORAGE_TARGET"); 496 if (target_base != NULL) { 497 if (mount("tmpfs", target_base, "tmpfs", MS_NOSUID | MS_NODEV, 498 "uid=0,gid=1028,mode=0751") == -1) { 499 LOG(WARNING) << "Failed to mount tmpfs to " << target_base; 500 return false; 501 } 502 } 503 504 return true; 505#else 506 UNIMPLEMENTED(FATAL); 507 return false; 508#endif 509} 510 511void Runtime::DidForkFromZygote(NativeBridgeAction action) { 512 is_zygote_ = false; 513 514 switch (action) { 515 case NativeBridgeAction::kUnload: 516 android::UnloadNativeBridge(); 517 break; 518 519 case NativeBridgeAction::kInitialize: 520 android::InitializeNativeBridge(); 521 break; 522 } 523 524 // Create the thread pool. 525 heap_->CreateThreadPool(); 526 527 StartSignalCatcher(); 528 529 // Start the JDWP thread. If the command-line debugger flags specified "suspend=y", 530 // this will pause the runtime, so we probably want this to come last. 531 Dbg::StartJdwp(); 532} 533 534void Runtime::StartSignalCatcher() { 535 if (!is_zygote_) { 536 signal_catcher_ = new SignalCatcher(stack_trace_file_); 537 } 538} 539 540bool Runtime::IsShuttingDown(Thread* self) { 541 MutexLock mu(self, *Locks::runtime_shutdown_lock_); 542 return IsShuttingDownLocked(); 543} 544 545void Runtime::StartDaemonThreads() { 546 VLOG(startup) << "Runtime::StartDaemonThreads entering"; 547 548 Thread* self = Thread::Current(); 549 550 // Must be in the kNative state for calling native methods. 551 CHECK_EQ(self->GetState(), kNative); 552 553 JNIEnv* env = self->GetJniEnv(); 554 env->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons, 555 WellKnownClasses::java_lang_Daemons_start); 556 if (env->ExceptionCheck()) { 557 env->ExceptionDescribe(); 558 LOG(FATAL) << "Error starting java.lang.Daemons"; 559 } 560 561 VLOG(startup) << "Runtime::StartDaemonThreads exiting"; 562} 563 564static bool OpenDexFilesFromImage(const std::vector<std::string>& dex_filenames, 565 const std::string& image_location, 566 std::vector<const DexFile*>& dex_files, 567 size_t* failures) { 568 std::string system_filename; 569 bool has_system = false; 570 std::string cache_filename_unused; 571 bool dalvik_cache_exists_unused; 572 bool has_cache_unused; 573 bool found_image = gc::space::ImageSpace::FindImageFilename(image_location.c_str(), 574 kRuntimeISA, 575 &system_filename, 576 &has_system, 577 &cache_filename_unused, 578 &dalvik_cache_exists_unused, 579 &has_cache_unused); 580 *failures = 0; 581 if (!found_image || !has_system) { 582 return false; 583 } 584 std::string error_msg; 585 // We are falling back to non-executable use of the oat file because patching failed, presumably 586 // due to lack of space. 587 std::string oat_filename = ImageHeader::GetOatLocationFromImageLocation(system_filename.c_str()); 588 std::string oat_location = ImageHeader::GetOatLocationFromImageLocation(image_location.c_str()); 589 std::unique_ptr<File> file(OS::OpenFileForReading(oat_filename.c_str())); 590 if (file.get() == nullptr) { 591 return false; 592 } 593 std::unique_ptr<ElfFile> elf_file(ElfFile::Open(file.release(), false, false, &error_msg)); 594 if (elf_file.get() == nullptr) { 595 return false; 596 } 597 std::unique_ptr<OatFile> oat_file(OatFile::OpenWithElfFile(elf_file.release(), oat_location, 598 &error_msg)); 599 if (oat_file.get() == nullptr) { 600 LOG(INFO) << "Unable to use '" << oat_filename << "' because " << error_msg; 601 return false; 602 } 603 604 for (const OatFile::OatDexFile* oat_dex_file : oat_file->GetOatDexFiles()) { 605 if (oat_dex_file == nullptr) { 606 *failures += 1; 607 continue; 608 } 609 const DexFile* dex_file = oat_dex_file->OpenDexFile(&error_msg); 610 if (dex_file == nullptr) { 611 *failures += 1; 612 } else { 613 dex_files.push_back(dex_file); 614 } 615 } 616 Runtime::Current()->GetClassLinker()->RegisterOatFile(oat_file.release()); 617 return true; 618} 619 620 621static size_t OpenDexFiles(const std::vector<std::string>& dex_filenames, 622 const std::string& image_location, 623 std::vector<const DexFile*>& dex_files) { 624 size_t failure_count = 0; 625 if (!image_location.empty() && OpenDexFilesFromImage(dex_filenames, image_location, dex_files, 626 &failure_count)) { 627 return failure_count; 628 } 629 failure_count = 0; 630 for (size_t i = 0; i < dex_filenames.size(); i++) { 631 const char* dex_filename = dex_filenames[i].c_str(); 632 std::string error_msg; 633 if (!OS::FileExists(dex_filename)) { 634 LOG(WARNING) << "Skipping non-existent dex file '" << dex_filename << "'"; 635 continue; 636 } 637 if (!DexFile::Open(dex_filename, dex_filename, &error_msg, &dex_files)) { 638 LOG(WARNING) << "Failed to open .dex from file '" << dex_filename << "': " << error_msg; 639 ++failure_count; 640 } 641 } 642 return failure_count; 643} 644 645bool Runtime::Init(const RuntimeOptions& raw_options, bool ignore_unrecognized) { 646 CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize); 647 648 std::unique_ptr<ParsedOptions> options(ParsedOptions::Create(raw_options, ignore_unrecognized)); 649 if (options.get() == nullptr) { 650 LOG(ERROR) << "Failed to parse options"; 651 return false; 652 } 653 VLOG(startup) << "Runtime::Init -verbose:startup enabled"; 654 655 QuasiAtomic::Startup(); 656 657 Monitor::Init(options->lock_profiling_threshold_, options->hook_is_sensitive_thread_); 658 659 boot_class_path_string_ = options->boot_class_path_string_; 660 class_path_string_ = options->class_path_string_; 661 properties_ = options->properties_; 662 663 compiler_callbacks_ = options->compiler_callbacks_; 664 patchoat_executable_ = options->patchoat_executable_; 665 must_relocate_ = options->must_relocate_; 666 is_zygote_ = options->is_zygote_; 667 is_explicit_gc_disabled_ = options->is_explicit_gc_disabled_; 668 dex2oat_enabled_ = options->dex2oat_enabled_; 669 image_dex2oat_enabled_ = options->image_dex2oat_enabled_; 670 671 vfprintf_ = options->hook_vfprintf_; 672 exit_ = options->hook_exit_; 673 abort_ = options->hook_abort_; 674 675 default_stack_size_ = options->stack_size_; 676 stack_trace_file_ = options->stack_trace_file_; 677 678 compiler_executable_ = options->compiler_executable_; 679 compiler_options_ = options->compiler_options_; 680 image_compiler_options_ = options->image_compiler_options_; 681 682 max_spins_before_thin_lock_inflation_ = options->max_spins_before_thin_lock_inflation_; 683 684 monitor_list_ = new MonitorList; 685 monitor_pool_ = MonitorPool::Create(); 686 thread_list_ = new ThreadList; 687 intern_table_ = new InternTable; 688 689 verify_ = options->verify_; 690 691 if (options->interpreter_only_) { 692 GetInstrumentation()->ForceInterpretOnly(); 693 } 694 695 heap_ = new gc::Heap(options->heap_initial_size_, 696 options->heap_growth_limit_, 697 options->heap_min_free_, 698 options->heap_max_free_, 699 options->heap_target_utilization_, 700 options->foreground_heap_growth_multiplier_, 701 options->heap_maximum_size_, 702 options->heap_non_moving_space_capacity_, 703 options->image_, 704 options->image_isa_, 705 options->collector_type_, 706 options->background_collector_type_, 707 options->parallel_gc_threads_, 708 options->conc_gc_threads_, 709 options->low_memory_mode_, 710 options->long_pause_log_threshold_, 711 options->long_gc_log_threshold_, 712 options->ignore_max_footprint_, 713 options->use_tlab_, 714 options->verify_pre_gc_heap_, 715 options->verify_pre_sweeping_heap_, 716 options->verify_post_gc_heap_, 717 options->verify_pre_gc_rosalloc_, 718 options->verify_pre_sweeping_rosalloc_, 719 options->verify_post_gc_rosalloc_, 720 options->use_homogeneous_space_compaction_for_oom_, 721 options->min_interval_homogeneous_space_compaction_by_oom_); 722 723 dump_gc_performance_on_shutdown_ = options->dump_gc_performance_on_shutdown_; 724 725 BlockSignals(); 726 InitPlatformSignalHandlers(); 727 728 // Change the implicit checks flags based on runtime architecture. 729 switch (kRuntimeISA) { 730 case kArm: 731 case kThumb2: 732 case kX86: 733 case kArm64: 734 case kX86_64: 735 implicit_null_checks_ = true; 736 implicit_so_checks_ = true; 737 break; 738 default: 739 // Keep the defaults. 740 break; 741 } 742 743 if (implicit_null_checks_ || implicit_so_checks_ || implicit_suspend_checks_) { 744 fault_manager.Init(); 745 746 // These need to be in a specific order. The null point check handler must be 747 // after the suspend check and stack overflow check handlers. 748 if (implicit_suspend_checks_) { 749 suspend_handler_ = new SuspensionHandler(&fault_manager); 750 } 751 752 if (implicit_so_checks_) { 753 stack_overflow_handler_ = new StackOverflowHandler(&fault_manager); 754 } 755 756 if (implicit_null_checks_) { 757 null_pointer_handler_ = new NullPointerHandler(&fault_manager); 758 } 759 760 if (kEnableJavaStackTraceHandler) { 761 new JavaStackTraceHandler(&fault_manager); 762 } 763 } 764 765 java_vm_ = new JavaVMExt(this, options.get()); 766 767 Thread::Startup(); 768 769 // ClassLinker needs an attached thread, but we can't fully attach a thread without creating 770 // objects. We can't supply a thread group yet; it will be fixed later. Since we are the main 771 // thread, we do not get a java peer. 772 Thread* self = Thread::Attach("main", false, nullptr, false); 773 CHECK_EQ(self->GetThreadId(), ThreadList::kMainThreadId); 774 CHECK(self != nullptr); 775 776 // Set us to runnable so tools using a runtime can allocate and GC by default 777 self->TransitionFromSuspendedToRunnable(); 778 779 // Now we're attached, we can take the heap locks and validate the heap. 780 GetHeap()->EnableObjectValidation(); 781 782 CHECK_GE(GetHeap()->GetContinuousSpaces().size(), 1U); 783 class_linker_ = new ClassLinker(intern_table_); 784 if (GetHeap()->HasImageSpace()) { 785 class_linker_->InitFromImage(); 786 if (kIsDebugBuild) { 787 GetHeap()->GetImageSpace()->VerifyImageAllocations(); 788 } 789 } else if (!IsCompiler() || !image_dex2oat_enabled_) { 790 std::vector<std::string> dex_filenames; 791 Split(boot_class_path_string_, ':', dex_filenames); 792 std::vector<const DexFile*> boot_class_path; 793 OpenDexFiles(dex_filenames, options->image_, boot_class_path); 794 class_linker_->InitWithoutImage(boot_class_path); 795 // TODO: Should we move the following to InitWithoutImage? 796 SetInstructionSet(kRuntimeISA); 797 for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) { 798 Runtime::CalleeSaveType type = Runtime::CalleeSaveType(i); 799 if (!HasCalleeSaveMethod(type)) { 800 SetCalleeSaveMethod(CreateCalleeSaveMethod(type), type); 801 } 802 } 803 } else { 804 CHECK(options->boot_class_path_ != nullptr); 805 CHECK_NE(options->boot_class_path_->size(), 0U); 806 class_linker_->InitWithoutImage(*options->boot_class_path_); 807 } 808 CHECK(class_linker_ != nullptr); 809 verifier::MethodVerifier::Init(); 810 811 method_trace_ = options->method_trace_; 812 method_trace_file_ = options->method_trace_file_; 813 method_trace_file_size_ = options->method_trace_file_size_; 814 815 profile_output_filename_ = options->profile_output_filename_; 816 profiler_options_ = options->profiler_options_; 817 818 // TODO: move this to just be an Trace::Start argument 819 Trace::SetDefaultClockSource(options->profile_clock_source_); 820 821 if (options->method_trace_) { 822 ScopedThreadStateChange tsc(self, kWaitingForMethodTracingStart); 823 Trace::Start(options->method_trace_file_.c_str(), -1, options->method_trace_file_size_, 0, 824 false, false, 0); 825 } 826 827 // Pre-allocate an OutOfMemoryError for the double-OOME case. 828 self->ThrowNewException(ThrowLocation(), "Ljava/lang/OutOfMemoryError;", 829 "OutOfMemoryError thrown while trying to throw OutOfMemoryError; " 830 "no stack available"); 831 pre_allocated_OutOfMemoryError_ = GcRoot<mirror::Throwable>(self->GetException(NULL)); 832 self->ClearException(); 833 834 // Pre-allocate a NoClassDefFoundError for the common case of failing to find a system class 835 // ahead of checking the application's class loader. 836 self->ThrowNewException(ThrowLocation(), "Ljava/lang/NoClassDefFoundError;", 837 "Class not found using the boot class loader; no stack available"); 838 pre_allocated_NoClassDefFoundError_ = GcRoot<mirror::Throwable>(self->GetException(NULL)); 839 self->ClearException(); 840 841 // Look for a native bridge. 842 // 843 // The intended flow here is, in the case of a running system: 844 // 845 // Runtime::Init() (zygote): 846 // LoadNativeBridge -> dlopen from cmd line parameter. 847 // | 848 // V 849 // Runtime::Start() (zygote): 850 // No-op wrt native bridge. 851 // | 852 // | start app 853 // V 854 // DidForkFromZygote(action) 855 // action = kUnload -> dlclose native bridge. 856 // action = kInitialize -> initialize library 857 // 858 // 859 // The intended flow here is, in the case of a simple dalvikvm call: 860 // 861 // Runtime::Init(): 862 // LoadNativeBridge -> dlopen from cmd line parameter. 863 // | 864 // V 865 // Runtime::Start(): 866 // DidForkFromZygote(kInitialize) -> try to initialize any native bridge given. 867 // No-op wrt native bridge. 868 native_bridge_library_filename_ = options->native_bridge_library_filename_; 869 android::LoadNativeBridge(native_bridge_library_filename_.c_str(), &native_bridge_art_callbacks_); 870 VLOG(startup) << "Runtime::Setup native bridge library: " 871 << (native_bridge_library_filename_.empty() ? 872 "(empty)" : native_bridge_library_filename_); 873 874 VLOG(startup) << "Runtime::Init exiting"; 875 return true; 876} 877 878void Runtime::InitNativeMethods() { 879 VLOG(startup) << "Runtime::InitNativeMethods entering"; 880 Thread* self = Thread::Current(); 881 JNIEnv* env = self->GetJniEnv(); 882 883 // Must be in the kNative state for calling native methods (JNI_OnLoad code). 884 CHECK_EQ(self->GetState(), kNative); 885 886 // First set up JniConstants, which is used by both the runtime's built-in native 887 // methods and libcore. 888 JniConstants::init(env); 889 WellKnownClasses::Init(env); 890 891 // Then set up the native methods provided by the runtime itself. 892 RegisterRuntimeNativeMethods(env); 893 894 // Then set up libcore, which is just a regular JNI library with a regular JNI_OnLoad. 895 // Most JNI libraries can just use System.loadLibrary, but libcore can't because it's 896 // the library that implements System.loadLibrary! 897 { 898 std::string mapped_name(StringPrintf(OS_SHARED_LIB_FORMAT_STR, "javacore")); 899 std::string reason; 900 self->TransitionFromSuspendedToRunnable(); 901 StackHandleScope<1> hs(self); 902 auto class_loader(hs.NewHandle<mirror::ClassLoader>(nullptr)); 903 if (!instance_->java_vm_->LoadNativeLibrary(mapped_name, class_loader, &reason)) { 904 LOG(FATAL) << "LoadNativeLibrary failed for \"" << mapped_name << "\": " << reason; 905 } 906 self->TransitionFromRunnableToSuspended(kNative); 907 } 908 909 // Initialize well known classes that may invoke runtime native methods. 910 WellKnownClasses::LateInit(env); 911 912 VLOG(startup) << "Runtime::InitNativeMethods exiting"; 913} 914 915void Runtime::InitThreadGroups(Thread* self) { 916 JNIEnvExt* env = self->GetJniEnv(); 917 ScopedJniEnvLocalRefState env_state(env); 918 main_thread_group_ = 919 env->NewGlobalRef(env->GetStaticObjectField( 920 WellKnownClasses::java_lang_ThreadGroup, 921 WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup)); 922 CHECK(main_thread_group_ != NULL || IsCompiler()); 923 system_thread_group_ = 924 env->NewGlobalRef(env->GetStaticObjectField( 925 WellKnownClasses::java_lang_ThreadGroup, 926 WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup)); 927 CHECK(system_thread_group_ != NULL || IsCompiler()); 928} 929 930jobject Runtime::GetMainThreadGroup() const { 931 CHECK(main_thread_group_ != NULL || IsCompiler()); 932 return main_thread_group_; 933} 934 935jobject Runtime::GetSystemThreadGroup() const { 936 CHECK(system_thread_group_ != NULL || IsCompiler()); 937 return system_thread_group_; 938} 939 940jobject Runtime::GetSystemClassLoader() const { 941 CHECK(system_class_loader_ != NULL || IsCompiler()); 942 return system_class_loader_; 943} 944 945void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) { 946#define REGISTER(FN) extern void FN(JNIEnv*); FN(env) 947 // Register Throwable first so that registration of other native methods can throw exceptions 948 REGISTER(register_java_lang_Throwable); 949 REGISTER(register_dalvik_system_DexFile); 950 REGISTER(register_dalvik_system_VMDebug); 951 REGISTER(register_dalvik_system_VMRuntime); 952 REGISTER(register_dalvik_system_VMStack); 953 REGISTER(register_dalvik_system_ZygoteHooks); 954 REGISTER(register_java_lang_Class); 955 REGISTER(register_java_lang_DexCache); 956 REGISTER(register_java_lang_Object); 957 REGISTER(register_java_lang_Runtime); 958 REGISTER(register_java_lang_String); 959 REGISTER(register_java_lang_System); 960 REGISTER(register_java_lang_Thread); 961 REGISTER(register_java_lang_VMClassLoader); 962 REGISTER(register_java_lang_ref_FinalizerReference); 963 REGISTER(register_java_lang_ref_Reference); 964 REGISTER(register_java_lang_reflect_Array); 965 REGISTER(register_java_lang_reflect_Constructor); 966 REGISTER(register_java_lang_reflect_Field); 967 REGISTER(register_java_lang_reflect_Method); 968 REGISTER(register_java_lang_reflect_Proxy); 969 REGISTER(register_java_util_concurrent_atomic_AtomicLong); 970 REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmServer); 971 REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmVmInternal); 972 REGISTER(register_sun_misc_Unsafe); 973#undef REGISTER 974} 975 976void Runtime::DumpForSigQuit(std::ostream& os) { 977 GetClassLinker()->DumpForSigQuit(os); 978 GetInternTable()->DumpForSigQuit(os); 979 GetJavaVM()->DumpForSigQuit(os); 980 GetHeap()->DumpForSigQuit(os); 981 TrackedAllocators::Dump(os); 982 os << "\n"; 983 984 thread_list_->DumpForSigQuit(os); 985 BaseMutex::DumpAll(os); 986} 987 988void Runtime::DumpLockHolders(std::ostream& os) { 989 uint64_t mutator_lock_owner = Locks::mutator_lock_->GetExclusiveOwnerTid(); 990 pid_t thread_list_lock_owner = GetThreadList()->GetLockOwner(); 991 pid_t classes_lock_owner = GetClassLinker()->GetClassesLockOwner(); 992 pid_t dex_lock_owner = GetClassLinker()->GetDexLockOwner(); 993 if ((thread_list_lock_owner | classes_lock_owner | dex_lock_owner) != 0) { 994 os << "Mutator lock exclusive owner tid: " << mutator_lock_owner << "\n" 995 << "ThreadList lock owner tid: " << thread_list_lock_owner << "\n" 996 << "ClassLinker classes lock owner tid: " << classes_lock_owner << "\n" 997 << "ClassLinker dex lock owner tid: " << dex_lock_owner << "\n"; 998 } 999} 1000 1001void Runtime::SetStatsEnabled(bool new_state) { 1002 if (new_state == true) { 1003 GetStats()->Clear(~0); 1004 // TODO: wouldn't it make more sense to clear _all_ threads' stats? 1005 Thread::Current()->GetStats()->Clear(~0); 1006 GetInstrumentation()->InstrumentQuickAllocEntryPoints(); 1007 } else { 1008 GetInstrumentation()->UninstrumentQuickAllocEntryPoints(); 1009 } 1010 stats_enabled_ = new_state; 1011} 1012 1013void Runtime::ResetStats(int kinds) { 1014 GetStats()->Clear(kinds & 0xffff); 1015 // TODO: wouldn't it make more sense to clear _all_ threads' stats? 1016 Thread::Current()->GetStats()->Clear(kinds >> 16); 1017} 1018 1019int32_t Runtime::GetStat(int kind) { 1020 RuntimeStats* stats; 1021 if (kind < (1<<16)) { 1022 stats = GetStats(); 1023 } else { 1024 stats = Thread::Current()->GetStats(); 1025 kind >>= 16; 1026 } 1027 switch (kind) { 1028 case KIND_ALLOCATED_OBJECTS: 1029 return stats->allocated_objects; 1030 case KIND_ALLOCATED_BYTES: 1031 return stats->allocated_bytes; 1032 case KIND_FREED_OBJECTS: 1033 return stats->freed_objects; 1034 case KIND_FREED_BYTES: 1035 return stats->freed_bytes; 1036 case KIND_GC_INVOCATIONS: 1037 return stats->gc_for_alloc_count; 1038 case KIND_CLASS_INIT_COUNT: 1039 return stats->class_init_count; 1040 case KIND_CLASS_INIT_TIME: 1041 // Convert ns to us, reduce to 32 bits. 1042 return static_cast<int>(stats->class_init_time_ns / 1000); 1043 case KIND_EXT_ALLOCATED_OBJECTS: 1044 case KIND_EXT_ALLOCATED_BYTES: 1045 case KIND_EXT_FREED_OBJECTS: 1046 case KIND_EXT_FREED_BYTES: 1047 return 0; // backward compatibility 1048 default: 1049 LOG(FATAL) << "Unknown statistic " << kind; 1050 return -1; // unreachable 1051 } 1052} 1053 1054void Runtime::BlockSignals() { 1055 SignalSet signals; 1056 signals.Add(SIGPIPE); 1057 // SIGQUIT is used to dump the runtime's state (including stack traces). 1058 signals.Add(SIGQUIT); 1059 // SIGUSR1 is used to initiate a GC. 1060 signals.Add(SIGUSR1); 1061 signals.Block(); 1062} 1063 1064bool Runtime::AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group, 1065 bool create_peer) { 1066 return Thread::Attach(thread_name, as_daemon, thread_group, create_peer) != NULL; 1067} 1068 1069void Runtime::DetachCurrentThread() { 1070 Thread* self = Thread::Current(); 1071 if (self == NULL) { 1072 LOG(FATAL) << "attempting to detach thread that is not attached"; 1073 } 1074 if (self->HasManagedStack()) { 1075 LOG(FATAL) << *Thread::Current() << " attempting to detach while still running code"; 1076 } 1077 thread_list_->Unregister(self); 1078} 1079 1080mirror::Throwable* Runtime::GetPreAllocatedOutOfMemoryError() { 1081 mirror::Throwable* oome = pre_allocated_OutOfMemoryError_.Read(); 1082 if (oome == nullptr) { 1083 LOG(ERROR) << "Failed to return pre-allocated OOME"; 1084 } 1085 return oome; 1086} 1087 1088mirror::Throwable* Runtime::GetPreAllocatedNoClassDefFoundError() { 1089 mirror::Throwable* ncdfe = pre_allocated_NoClassDefFoundError_.Read(); 1090 if (ncdfe == nullptr) { 1091 LOG(ERROR) << "Failed to return pre-allocated NoClassDefFoundError"; 1092 } 1093 return ncdfe; 1094} 1095 1096void Runtime::VisitConstantRoots(RootCallback* callback, void* arg) { 1097 // Visit the classes held as static in mirror classes, these can be visited concurrently and only 1098 // need to be visited once per GC since they never change. 1099 mirror::ArtField::VisitRoots(callback, arg); 1100 mirror::ArtMethod::VisitRoots(callback, arg); 1101 mirror::Class::VisitRoots(callback, arg); 1102 mirror::Reference::VisitRoots(callback, arg); 1103 mirror::StackTraceElement::VisitRoots(callback, arg); 1104 mirror::String::VisitRoots(callback, arg); 1105 mirror::Throwable::VisitRoots(callback, arg); 1106 // Visit all the primitive array types classes. 1107 mirror::PrimitiveArray<uint8_t>::VisitRoots(callback, arg); // BooleanArray 1108 mirror::PrimitiveArray<int8_t>::VisitRoots(callback, arg); // ByteArray 1109 mirror::PrimitiveArray<uint16_t>::VisitRoots(callback, arg); // CharArray 1110 mirror::PrimitiveArray<double>::VisitRoots(callback, arg); // DoubleArray 1111 mirror::PrimitiveArray<float>::VisitRoots(callback, arg); // FloatArray 1112 mirror::PrimitiveArray<int32_t>::VisitRoots(callback, arg); // IntArray 1113 mirror::PrimitiveArray<int64_t>::VisitRoots(callback, arg); // LongArray 1114 mirror::PrimitiveArray<int16_t>::VisitRoots(callback, arg); // ShortArray 1115} 1116 1117void Runtime::VisitConcurrentRoots(RootCallback* callback, void* arg, VisitRootFlags flags) { 1118 intern_table_->VisitRoots(callback, arg, flags); 1119 class_linker_->VisitRoots(callback, arg, flags); 1120 if ((flags & kVisitRootFlagNewRoots) == 0) { 1121 // Guaranteed to have no new roots in the constant roots. 1122 VisitConstantRoots(callback, arg); 1123 } 1124} 1125 1126void Runtime::VisitNonThreadRoots(RootCallback* callback, void* arg) { 1127 java_vm_->VisitRoots(callback, arg); 1128 if (!pre_allocated_OutOfMemoryError_.IsNull()) { 1129 pre_allocated_OutOfMemoryError_.VisitRoot(callback, arg, 0, kRootVMInternal); 1130 DCHECK(!pre_allocated_OutOfMemoryError_.IsNull()); 1131 } 1132 resolution_method_.VisitRoot(callback, arg, 0, kRootVMInternal); 1133 DCHECK(!resolution_method_.IsNull()); 1134 if (!pre_allocated_NoClassDefFoundError_.IsNull()) { 1135 pre_allocated_NoClassDefFoundError_.VisitRoot(callback, arg, 0, kRootVMInternal); 1136 DCHECK(!pre_allocated_NoClassDefFoundError_.IsNull()); 1137 } 1138 if (HasImtConflictMethod()) { 1139 imt_conflict_method_.VisitRoot(callback, arg, 0, kRootVMInternal); 1140 } 1141 if (HasDefaultImt()) { 1142 default_imt_.VisitRoot(callback, arg, 0, kRootVMInternal); 1143 } 1144 for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) { 1145 if (!callee_save_methods_[i].IsNull()) { 1146 callee_save_methods_[i].VisitRoot(callback, arg, 0, kRootVMInternal); 1147 } 1148 } 1149 verifier::MethodVerifier::VisitStaticRoots(callback, arg); 1150 { 1151 MutexLock mu(Thread::Current(), method_verifier_lock_); 1152 for (verifier::MethodVerifier* verifier : method_verifiers_) { 1153 verifier->VisitRoots(callback, arg); 1154 } 1155 } 1156 if (preinitialization_transaction_ != nullptr) { 1157 preinitialization_transaction_->VisitRoots(callback, arg); 1158 } 1159 instrumentation_.VisitRoots(callback, arg); 1160} 1161 1162void Runtime::VisitNonConcurrentRoots(RootCallback* callback, void* arg) { 1163 thread_list_->VisitRoots(callback, arg); 1164 VisitNonThreadRoots(callback, arg); 1165} 1166 1167void Runtime::VisitRoots(RootCallback* callback, void* arg, VisitRootFlags flags) { 1168 VisitNonConcurrentRoots(callback, arg); 1169 VisitConcurrentRoots(callback, arg, flags); 1170} 1171 1172mirror::ObjectArray<mirror::ArtMethod>* Runtime::CreateDefaultImt(ClassLinker* cl) { 1173 Thread* self = Thread::Current(); 1174 StackHandleScope<1> hs(self); 1175 Handle<mirror::ObjectArray<mirror::ArtMethod>> imtable( 1176 hs.NewHandle(cl->AllocArtMethodArray(self, 64))); 1177 mirror::ArtMethod* imt_conflict_method = Runtime::Current()->GetImtConflictMethod(); 1178 for (size_t i = 0; i < static_cast<size_t>(imtable->GetLength()); i++) { 1179 imtable->Set<false>(i, imt_conflict_method); 1180 } 1181 return imtable.Get(); 1182} 1183 1184mirror::ArtMethod* Runtime::CreateImtConflictMethod() { 1185 Thread* self = Thread::Current(); 1186 Runtime* runtime = Runtime::Current(); 1187 ClassLinker* class_linker = runtime->GetClassLinker(); 1188 StackHandleScope<1> hs(self); 1189 Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self))); 1190 method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod()); 1191 // TODO: use a special method for imt conflict method saves. 1192 method->SetDexMethodIndex(DexFile::kDexNoIndex); 1193 // When compiling, the code pointer will get set later when the image is loaded. 1194 if (runtime->IsCompiler()) { 1195 method->SetEntryPointFromPortableCompiledCode(nullptr); 1196 method->SetEntryPointFromQuickCompiledCode(nullptr); 1197 } else { 1198 method->SetEntryPointFromPortableCompiledCode(class_linker->GetPortableImtConflictTrampoline()); 1199 method->SetEntryPointFromQuickCompiledCode(class_linker->GetQuickImtConflictTrampoline()); 1200 } 1201 return method.Get(); 1202} 1203 1204mirror::ArtMethod* Runtime::CreateResolutionMethod() { 1205 Thread* self = Thread::Current(); 1206 Runtime* runtime = Runtime::Current(); 1207 ClassLinker* class_linker = runtime->GetClassLinker(); 1208 StackHandleScope<1> hs(self); 1209 Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self))); 1210 method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod()); 1211 // TODO: use a special method for resolution method saves 1212 method->SetDexMethodIndex(DexFile::kDexNoIndex); 1213 // When compiling, the code pointer will get set later when the image is loaded. 1214 if (runtime->IsCompiler()) { 1215 method->SetEntryPointFromPortableCompiledCode(nullptr); 1216 method->SetEntryPointFromQuickCompiledCode(nullptr); 1217 } else { 1218 method->SetEntryPointFromPortableCompiledCode(class_linker->GetPortableResolutionTrampoline()); 1219 method->SetEntryPointFromQuickCompiledCode(class_linker->GetQuickResolutionTrampoline()); 1220 } 1221 return method.Get(); 1222} 1223 1224mirror::ArtMethod* Runtime::CreateCalleeSaveMethod(CalleeSaveType type) { 1225 Thread* self = Thread::Current(); 1226 Runtime* runtime = Runtime::Current(); 1227 ClassLinker* class_linker = runtime->GetClassLinker(); 1228 StackHandleScope<1> hs(self); 1229 Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self))); 1230 method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod()); 1231 // TODO: use a special method for callee saves 1232 method->SetDexMethodIndex(DexFile::kDexNoIndex); 1233 method->SetEntryPointFromPortableCompiledCode(nullptr); 1234 method->SetEntryPointFromQuickCompiledCode(nullptr); 1235 DCHECK_NE(instruction_set_, kNone); 1236 return method.Get(); 1237} 1238 1239void Runtime::DisallowNewSystemWeaks() { 1240 monitor_list_->DisallowNewMonitors(); 1241 intern_table_->DisallowNewInterns(); 1242 java_vm_->DisallowNewWeakGlobals(); 1243} 1244 1245void Runtime::AllowNewSystemWeaks() { 1246 monitor_list_->AllowNewMonitors(); 1247 intern_table_->AllowNewInterns(); 1248 java_vm_->AllowNewWeakGlobals(); 1249} 1250 1251void Runtime::SetInstructionSet(InstructionSet instruction_set) { 1252 instruction_set_ = instruction_set; 1253 if ((instruction_set_ == kThumb2) || (instruction_set_ == kArm)) { 1254 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1255 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1256 callee_save_method_frame_infos_[i] = arm::ArmCalleeSaveMethodFrameInfo(type); 1257 } 1258 } else if (instruction_set_ == kMips) { 1259 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1260 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1261 callee_save_method_frame_infos_[i] = mips::MipsCalleeSaveMethodFrameInfo(type); 1262 } 1263 } else if (instruction_set_ == kX86) { 1264 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1265 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1266 callee_save_method_frame_infos_[i] = x86::X86CalleeSaveMethodFrameInfo(type); 1267 } 1268 } else if (instruction_set_ == kX86_64) { 1269 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1270 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1271 callee_save_method_frame_infos_[i] = x86_64::X86_64CalleeSaveMethodFrameInfo(type); 1272 } 1273 } else if (instruction_set_ == kArm64) { 1274 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1275 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1276 callee_save_method_frame_infos_[i] = arm64::Arm64CalleeSaveMethodFrameInfo(type); 1277 } 1278 } else { 1279 UNIMPLEMENTED(FATAL) << instruction_set_; 1280 } 1281} 1282 1283void Runtime::SetCalleeSaveMethod(mirror::ArtMethod* method, CalleeSaveType type) { 1284 DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastCalleeSaveType)); 1285 callee_save_methods_[type] = GcRoot<mirror::ArtMethod>(method); 1286} 1287 1288const std::vector<const DexFile*>& Runtime::GetCompileTimeClassPath(jobject class_loader) { 1289 if (class_loader == NULL) { 1290 return GetClassLinker()->GetBootClassPath(); 1291 } 1292 CHECK(UseCompileTimeClassPath()); 1293 CompileTimeClassPaths::const_iterator it = compile_time_class_paths_.find(class_loader); 1294 CHECK(it != compile_time_class_paths_.end()); 1295 return it->second; 1296} 1297 1298void Runtime::SetCompileTimeClassPath(jobject class_loader, 1299 std::vector<const DexFile*>& class_path) { 1300 CHECK(!IsStarted()); 1301 use_compile_time_class_path_ = true; 1302 compile_time_class_paths_.Put(class_loader, class_path); 1303} 1304 1305void Runtime::AddMethodVerifier(verifier::MethodVerifier* verifier) { 1306 DCHECK(verifier != nullptr); 1307 MutexLock mu(Thread::Current(), method_verifier_lock_); 1308 method_verifiers_.insert(verifier); 1309} 1310 1311void Runtime::RemoveMethodVerifier(verifier::MethodVerifier* verifier) { 1312 DCHECK(verifier != nullptr); 1313 MutexLock mu(Thread::Current(), method_verifier_lock_); 1314 auto it = method_verifiers_.find(verifier); 1315 CHECK(it != method_verifiers_.end()); 1316 method_verifiers_.erase(it); 1317} 1318 1319void Runtime::StartProfiler(const char* profile_output_filename) { 1320 profile_output_filename_ = profile_output_filename; 1321 profiler_started_ = 1322 BackgroundMethodSamplingProfiler::Start(profile_output_filename_, profiler_options_); 1323} 1324 1325// Transaction support. 1326void Runtime::EnterTransactionMode(Transaction* transaction) { 1327 DCHECK(IsCompiler()); 1328 DCHECK(transaction != nullptr); 1329 DCHECK(!IsActiveTransaction()); 1330 preinitialization_transaction_ = transaction; 1331} 1332 1333void Runtime::ExitTransactionMode() { 1334 DCHECK(IsCompiler()); 1335 DCHECK(IsActiveTransaction()); 1336 preinitialization_transaction_ = nullptr; 1337} 1338 1339void Runtime::RecordWriteField32(mirror::Object* obj, MemberOffset field_offset, 1340 uint32_t value, bool is_volatile) const { 1341 DCHECK(IsCompiler()); 1342 DCHECK(IsActiveTransaction()); 1343 preinitialization_transaction_->RecordWriteField32(obj, field_offset, value, is_volatile); 1344} 1345 1346void Runtime::RecordWriteField64(mirror::Object* obj, MemberOffset field_offset, 1347 uint64_t value, bool is_volatile) const { 1348 DCHECK(IsCompiler()); 1349 DCHECK(IsActiveTransaction()); 1350 preinitialization_transaction_->RecordWriteField64(obj, field_offset, value, is_volatile); 1351} 1352 1353void Runtime::RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset, 1354 mirror::Object* value, bool is_volatile) const { 1355 DCHECK(IsCompiler()); 1356 DCHECK(IsActiveTransaction()); 1357 preinitialization_transaction_->RecordWriteFieldReference(obj, field_offset, value, is_volatile); 1358} 1359 1360void Runtime::RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const { 1361 DCHECK(IsCompiler()); 1362 DCHECK(IsActiveTransaction()); 1363 preinitialization_transaction_->RecordWriteArray(array, index, value); 1364} 1365 1366void Runtime::RecordStrongStringInsertion(mirror::String* s) const { 1367 DCHECK(IsCompiler()); 1368 DCHECK(IsActiveTransaction()); 1369 preinitialization_transaction_->RecordStrongStringInsertion(s); 1370} 1371 1372void Runtime::RecordWeakStringInsertion(mirror::String* s) const { 1373 DCHECK(IsCompiler()); 1374 DCHECK(IsActiveTransaction()); 1375 preinitialization_transaction_->RecordWeakStringInsertion(s); 1376} 1377 1378void Runtime::RecordStrongStringRemoval(mirror::String* s) const { 1379 DCHECK(IsCompiler()); 1380 DCHECK(IsActiveTransaction()); 1381 preinitialization_transaction_->RecordStrongStringRemoval(s); 1382} 1383 1384void Runtime::RecordWeakStringRemoval(mirror::String* s) const { 1385 DCHECK(IsCompiler()); 1386 DCHECK(IsActiveTransaction()); 1387 preinitialization_transaction_->RecordWeakStringRemoval(s); 1388} 1389 1390void Runtime::SetFaultMessage(const std::string& message) { 1391 MutexLock mu(Thread::Current(), fault_message_lock_); 1392 fault_message_ = message; 1393} 1394 1395void Runtime::AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* argv) 1396 const { 1397 if (GetInstrumentation()->InterpretOnly()) { 1398 argv->push_back("--compiler-filter=interpret-only"); 1399 } 1400 1401 // Make the dex2oat instruction set match that of the launching runtime. If we have multiple 1402 // architecture support, dex2oat may be compiled as a different instruction-set than that 1403 // currently being executed. 1404 std::string instruction_set("--instruction-set="); 1405 instruction_set += GetInstructionSetString(kRuntimeISA); 1406 argv->push_back(instruction_set); 1407 1408 std::string features("--instruction-set-features="); 1409 features += GetDefaultInstructionSetFeatures(); 1410 argv->push_back(features); 1411} 1412 1413void Runtime::UpdateProfilerState(int state) { 1414 VLOG(profiler) << "Profiler state updated to " << state; 1415} 1416} // namespace art 1417