runtime.cc revision e5de54cfab5f14ba0b8ff25d8d60901c7021943f
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#include <sys/prctl.h> 24#endif 25 26#include <signal.h> 27#include <sys/syscall.h> 28#include "base/memory_tool.h" 29 30#include <cstdio> 31#include <cstdlib> 32#include <limits> 33#include <memory_representation.h> 34#include <vector> 35#include <fcntl.h> 36 37#include "JniConstants.h" 38#include "ScopedLocalRef.h" 39#include "arch/arm/quick_method_frame_info_arm.h" 40#include "arch/arm/registers_arm.h" 41#include "arch/arm64/quick_method_frame_info_arm64.h" 42#include "arch/arm64/registers_arm64.h" 43#include "arch/instruction_set_features.h" 44#include "arch/mips/quick_method_frame_info_mips.h" 45#include "arch/mips/registers_mips.h" 46#include "arch/mips64/quick_method_frame_info_mips64.h" 47#include "arch/mips64/registers_mips64.h" 48#include "arch/x86/quick_method_frame_info_x86.h" 49#include "arch/x86/registers_x86.h" 50#include "arch/x86_64/quick_method_frame_info_x86_64.h" 51#include "arch/x86_64/registers_x86_64.h" 52#include "art_field-inl.h" 53#include "art_method-inl.h" 54#include "asm_support.h" 55#include "atomic.h" 56#include "base/arena_allocator.h" 57#include "base/dumpable.h" 58#include "base/stl_util.h" 59#include "base/systrace.h" 60#include "base/unix_file/fd_file.h" 61#include "class_linker-inl.h" 62#include "compiler_callbacks.h" 63#include "compiler_filter.h" 64#include "debugger.h" 65#include "elf_file.h" 66#include "entrypoints/runtime_asm_entrypoints.h" 67#include "experimental_flags.h" 68#include "fault_handler.h" 69#include "gc/accounting/card_table-inl.h" 70#include "gc/heap.h" 71#include "gc/space/image_space.h" 72#include "gc/space/space-inl.h" 73#include "handle_scope-inl.h" 74#include "image-inl.h" 75#include "instrumentation.h" 76#include "intern_table.h" 77#include "interpreter/interpreter.h" 78#include "jit/jit.h" 79#include "jni_internal.h" 80#include "linear_alloc.h" 81#include "lambda/box_table.h" 82#include "mirror/array.h" 83#include "mirror/class-inl.h" 84#include "mirror/class_loader.h" 85#include "mirror/field.h" 86#include "mirror/method.h" 87#include "mirror/stack_trace_element.h" 88#include "mirror/throwable.h" 89#include "monitor.h" 90#include "native/dalvik_system_DexFile.h" 91#include "native/dalvik_system_VMDebug.h" 92#include "native/dalvik_system_VMRuntime.h" 93#include "native/dalvik_system_VMStack.h" 94#include "native/dalvik_system_ZygoteHooks.h" 95#include "native/java_lang_Class.h" 96#include "native/java_lang_DexCache.h" 97#include "native/java_lang_Object.h" 98#include "native/java_lang_String.h" 99#include "native/java_lang_StringFactory.h" 100#include "native/java_lang_System.h" 101#include "native/java_lang_Thread.h" 102#include "native/java_lang_Throwable.h" 103#include "native/java_lang_VMClassLoader.h" 104#include "native/java_lang_ref_FinalizerReference.h" 105#include "native/java_lang_ref_Reference.h" 106#include "native/java_lang_reflect_AbstractMethod.h" 107#include "native/java_lang_reflect_Array.h" 108#include "native/java_lang_reflect_Constructor.h" 109#include "native/java_lang_reflect_Field.h" 110#include "native/java_lang_reflect_Method.h" 111#include "native/java_lang_reflect_Proxy.h" 112#include "native/java_util_concurrent_atomic_AtomicLong.h" 113#include "native/libcore_util_CharsetUtils.h" 114#include "native/org_apache_harmony_dalvik_ddmc_DdmServer.h" 115#include "native/org_apache_harmony_dalvik_ddmc_DdmVmInternal.h" 116#include "native/sun_misc_Unsafe.h" 117#include "native_bridge_art_interface.h" 118#include "oat_file.h" 119#include "oat_file_manager.h" 120#include "os.h" 121#include "parsed_options.h" 122#include "profiler.h" 123#include "jit/profile_saver.h" 124#include "quick/quick_method_frame_info.h" 125#include "reflection.h" 126#include "runtime_options.h" 127#include "ScopedLocalRef.h" 128#include "scoped_thread_state_change.h" 129#include "sigchain.h" 130#include "signal_catcher.h" 131#include "signal_set.h" 132#include "thread.h" 133#include "thread_list.h" 134#include "trace.h" 135#include "transaction.h" 136#include "utils.h" 137#include "verifier/method_verifier.h" 138#include "well_known_classes.h" 139 140namespace art { 141 142// If a signal isn't handled properly, enable a handler that attempts to dump the Java stack. 143static constexpr bool kEnableJavaStackTraceHandler = false; 144// Tuned by compiling GmsCore under perf and measuring time spent in DescriptorEquals for class 145// linking. 146static constexpr double kLowMemoryMinLoadFactor = 0.5; 147static constexpr double kLowMemoryMaxLoadFactor = 0.8; 148static constexpr double kNormalMinLoadFactor = 0.4; 149static constexpr double kNormalMaxLoadFactor = 0.7; 150Runtime* Runtime::instance_ = nullptr; 151 152struct TraceConfig { 153 Trace::TraceMode trace_mode; 154 Trace::TraceOutputMode trace_output_mode; 155 std::string trace_file; 156 size_t trace_file_size; 157}; 158 159Runtime::Runtime() 160 : resolution_method_(nullptr), 161 imt_conflict_method_(nullptr), 162 imt_unimplemented_method_(nullptr), 163 instruction_set_(kNone), 164 compiler_callbacks_(nullptr), 165 is_zygote_(false), 166 must_relocate_(false), 167 is_concurrent_gc_enabled_(true), 168 is_explicit_gc_disabled_(false), 169 dex2oat_enabled_(true), 170 image_dex2oat_enabled_(true), 171 default_stack_size_(0), 172 heap_(nullptr), 173 max_spins_before_thin_lock_inflation_(Monitor::kDefaultMaxSpinsBeforeThinLockInflation), 174 monitor_list_(nullptr), 175 monitor_pool_(nullptr), 176 thread_list_(nullptr), 177 intern_table_(nullptr), 178 class_linker_(nullptr), 179 signal_catcher_(nullptr), 180 java_vm_(nullptr), 181 fault_message_lock_("Fault message lock"), 182 fault_message_(""), 183 threads_being_born_(0), 184 shutdown_cond_(new ConditionVariable("Runtime shutdown", *Locks::runtime_shutdown_lock_)), 185 shutting_down_(false), 186 shutting_down_started_(false), 187 started_(false), 188 finished_starting_(false), 189 vfprintf_(nullptr), 190 exit_(nullptr), 191 abort_(nullptr), 192 stats_enabled_(false), 193 is_running_on_memory_tool_(RUNNING_ON_MEMORY_TOOL), 194 instrumentation_(), 195 main_thread_group_(nullptr), 196 system_thread_group_(nullptr), 197 system_class_loader_(nullptr), 198 dump_gc_performance_on_shutdown_(false), 199 preinitialization_transaction_(nullptr), 200 verify_(verifier::VerifyMode::kNone), 201 allow_dex_file_fallback_(true), 202 target_sdk_version_(0), 203 implicit_null_checks_(false), 204 implicit_so_checks_(false), 205 implicit_suspend_checks_(false), 206 no_sig_chain_(false), 207 force_native_bridge_(false), 208 is_native_bridge_loaded_(false), 209 is_native_debuggable_(false), 210 zygote_max_failed_boots_(0), 211 experimental_flags_(ExperimentalFlags::kNone), 212 oat_file_manager_(nullptr), 213 is_low_memory_mode_(false), 214 safe_mode_(false), 215 dump_native_stack_on_sig_quit_(true), 216 pruned_dalvik_cache_(false), 217 // Initially assume we perceive jank in case the process state is never updated. 218 process_state_(kProcessStateJankPerceptible), 219 zygote_no_threads_(false) { 220 CheckAsmSupportOffsetsAndSizes(); 221 std::fill(callee_save_methods_, callee_save_methods_ + arraysize(callee_save_methods_), 0u); 222 interpreter::CheckInterpreterAsmConstants(); 223} 224 225Runtime::~Runtime() { 226 ScopedTrace trace("Runtime shutdown"); 227 if (is_native_bridge_loaded_) { 228 UnloadNativeBridge(); 229 } 230 231 if (dump_gc_performance_on_shutdown_) { 232 // This can't be called from the Heap destructor below because it 233 // could call RosAlloc::InspectAll() which needs the thread_list 234 // to be still alive. 235 heap_->DumpGcPerformanceInfo(LOG(INFO)); 236 } 237 238 Thread* self = Thread::Current(); 239 const bool attach_shutdown_thread = self == nullptr; 240 if (attach_shutdown_thread) { 241 CHECK(AttachCurrentThread("Shutdown thread", false, nullptr, false)); 242 self = Thread::Current(); 243 } else { 244 LOG(WARNING) << "Current thread not detached in Runtime shutdown"; 245 } 246 247 { 248 ScopedTrace trace2("Wait for shutdown cond"); 249 MutexLock mu(self, *Locks::runtime_shutdown_lock_); 250 shutting_down_started_ = true; 251 while (threads_being_born_ > 0) { 252 shutdown_cond_->Wait(self); 253 } 254 shutting_down_ = true; 255 } 256 // Shutdown and wait for the daemons. 257 CHECK(self != nullptr); 258 if (IsFinishedStarting()) { 259 ScopedTrace trace2("Waiting for Daemons"); 260 self->ClearException(); 261 self->GetJniEnv()->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons, 262 WellKnownClasses::java_lang_Daemons_stop); 263 } 264 265 Trace::Shutdown(); 266 267 if (attach_shutdown_thread) { 268 DetachCurrentThread(); 269 self = nullptr; 270 } 271 272 // Make sure to let the GC complete if it is running. 273 heap_->WaitForGcToComplete(gc::kGcCauseBackground, self); 274 heap_->DeleteThreadPool(); 275 if (jit_ != nullptr) { 276 ScopedTrace trace2("Delete jit"); 277 VLOG(jit) << "Deleting jit thread pool"; 278 // Delete thread pool before the thread list since we don't want to wait forever on the 279 // JIT compiler threads. 280 jit_->DeleteThreadPool(); 281 // Similarly, stop the profile saver thread before deleting the thread list. 282 jit_->StopProfileSaver(); 283 } 284 285 // Make sure our internal threads are dead before we start tearing down things they're using. 286 Dbg::StopJdwp(); 287 delete signal_catcher_; 288 289 // Make sure all other non-daemon threads have terminated, and all daemon threads are suspended. 290 { 291 ScopedTrace trace2("Delete thread list"); 292 delete thread_list_; 293 } 294 // Delete the JIT after thread list to ensure that there is no remaining threads which could be 295 // accessing the instrumentation when we delete it. 296 if (jit_ != nullptr) { 297 VLOG(jit) << "Deleting jit"; 298 jit_.reset(nullptr); 299 } 300 301 // Shutdown the fault manager if it was initialized. 302 fault_manager.Shutdown(); 303 304 ScopedTrace trace2("Delete state"); 305 delete monitor_list_; 306 delete monitor_pool_; 307 delete class_linker_; 308 delete heap_; 309 delete intern_table_; 310 delete java_vm_; 311 delete oat_file_manager_; 312 Thread::Shutdown(); 313 QuasiAtomic::Shutdown(); 314 verifier::MethodVerifier::Shutdown(); 315 316 // Destroy allocators before shutting down the MemMap because they may use it. 317 linear_alloc_.reset(); 318 low_4gb_arena_pool_.reset(); 319 arena_pool_.reset(); 320 jit_arena_pool_.reset(); 321 MemMap::Shutdown(); 322 323 // TODO: acquire a static mutex on Runtime to avoid racing. 324 CHECK(instance_ == nullptr || instance_ == this); 325 instance_ = nullptr; 326} 327 328struct AbortState { 329 void Dump(std::ostream& os) const { 330 if (gAborting > 1) { 331 os << "Runtime aborting --- recursively, so no thread-specific detail!\n"; 332 return; 333 } 334 gAborting++; 335 os << "Runtime aborting...\n"; 336 if (Runtime::Current() == nullptr) { 337 os << "(Runtime does not yet exist!)\n"; 338 DumpNativeStack(os, GetTid(), nullptr, " native: ", nullptr); 339 return; 340 } 341 Thread* self = Thread::Current(); 342 if (self == nullptr) { 343 os << "(Aborting thread was not attached to runtime!)\n"; 344 DumpKernelStack(os, GetTid(), " kernel: ", false); 345 DumpNativeStack(os, GetTid(), nullptr, " native: ", nullptr); 346 } else { 347 os << "Aborting thread:\n"; 348 if (Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)) { 349 DumpThread(os, self); 350 } else { 351 if (Locks::mutator_lock_->SharedTryLock(self)) { 352 DumpThread(os, self); 353 Locks::mutator_lock_->SharedUnlock(self); 354 } 355 } 356 } 357 DumpAllThreads(os, self); 358 } 359 360 // No thread-safety analysis as we do explicitly test for holding the mutator lock. 361 void DumpThread(std::ostream& os, Thread* self) const NO_THREAD_SAFETY_ANALYSIS { 362 DCHECK(Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)); 363 self->Dump(os); 364 if (self->IsExceptionPending()) { 365 mirror::Throwable* exception = self->GetException(); 366 os << "Pending exception " << exception->Dump(); 367 } 368 } 369 370 void DumpAllThreads(std::ostream& os, Thread* self) const { 371 Runtime* runtime = Runtime::Current(); 372 if (runtime != nullptr) { 373 ThreadList* thread_list = runtime->GetThreadList(); 374 if (thread_list != nullptr) { 375 bool tll_already_held = Locks::thread_list_lock_->IsExclusiveHeld(self); 376 bool ml_already_held = Locks::mutator_lock_->IsSharedHeld(self); 377 if (!tll_already_held || !ml_already_held) { 378 os << "Dumping all threads without appropriate locks held:" 379 << (!tll_already_held ? " thread list lock" : "") 380 << (!ml_already_held ? " mutator lock" : "") 381 << "\n"; 382 } 383 os << "All threads:\n"; 384 thread_list->Dump(os); 385 } 386 } 387 } 388}; 389 390void Runtime::Abort() { 391 gAborting++; // set before taking any locks 392 393 // Ensure that we don't have multiple threads trying to abort at once, 394 // which would result in significantly worse diagnostics. 395 MutexLock mu(Thread::Current(), *Locks::abort_lock_); 396 397 // Get any pending output out of the way. 398 fflush(nullptr); 399 400 // Many people have difficulty distinguish aborts from crashes, 401 // so be explicit. 402 AbortState state; 403 LOG(INTERNAL_FATAL) << Dumpable<AbortState>(state); 404 405 // Call the abort hook if we have one. 406 if (Runtime::Current() != nullptr && Runtime::Current()->abort_ != nullptr) { 407 LOG(INTERNAL_FATAL) << "Calling abort hook..."; 408 Runtime::Current()->abort_(); 409 // notreached 410 LOG(INTERNAL_FATAL) << "Unexpectedly returned from abort hook!"; 411 } 412 413#if defined(__GLIBC__) 414 // TODO: we ought to be able to use pthread_kill(3) here (or abort(3), 415 // which POSIX defines in terms of raise(3), which POSIX defines in terms 416 // of pthread_kill(3)). On Linux, though, libcorkscrew can't unwind through 417 // libpthread, which means the stacks we dump would be useless. Calling 418 // tgkill(2) directly avoids that. 419 syscall(__NR_tgkill, getpid(), GetTid(), SIGABRT); 420 // TODO: LLVM installs it's own SIGABRT handler so exit to be safe... Can we disable that in LLVM? 421 // If not, we could use sigaction(3) before calling tgkill(2) and lose this call to exit(3). 422 exit(1); 423#else 424 abort(); 425#endif 426 // notreached 427} 428 429void Runtime::PreZygoteFork() { 430 heap_->PreZygoteFork(); 431} 432 433void Runtime::CallExitHook(jint status) { 434 if (exit_ != nullptr) { 435 ScopedThreadStateChange tsc(Thread::Current(), kNative); 436 exit_(status); 437 LOG(WARNING) << "Exit hook returned instead of exiting!"; 438 } 439} 440 441void Runtime::SweepSystemWeaks(IsMarkedVisitor* visitor) { 442 GetInternTable()->SweepInternTableWeaks(visitor); 443 GetMonitorList()->SweepMonitorList(visitor); 444 GetJavaVM()->SweepJniWeakGlobals(visitor); 445 GetHeap()->SweepAllocationRecords(visitor); 446 GetLambdaBoxTable()->SweepWeakBoxedLambdas(visitor); 447} 448 449bool Runtime::ParseOptions(const RuntimeOptions& raw_options, 450 bool ignore_unrecognized, 451 RuntimeArgumentMap* runtime_options) { 452 InitLogging(/* argv */ nullptr); // Calls Locks::Init() as a side effect. 453 bool parsed = ParsedOptions::Parse(raw_options, ignore_unrecognized, runtime_options); 454 if (!parsed) { 455 LOG(ERROR) << "Failed to parse options"; 456 return false; 457 } 458 return true; 459} 460 461bool Runtime::Create(RuntimeArgumentMap&& runtime_options) { 462 // TODO: acquire a static mutex on Runtime to avoid racing. 463 if (Runtime::instance_ != nullptr) { 464 return false; 465 } 466 instance_ = new Runtime; 467 if (!instance_->Init(std::move(runtime_options))) { 468 // TODO: Currently deleting the instance will abort the runtime on destruction. Now This will 469 // leak memory, instead. Fix the destructor. b/19100793. 470 // delete instance_; 471 instance_ = nullptr; 472 return false; 473 } 474 return true; 475} 476 477bool Runtime::Create(const RuntimeOptions& raw_options, bool ignore_unrecognized) { 478 RuntimeArgumentMap runtime_options; 479 return ParseOptions(raw_options, ignore_unrecognized, &runtime_options) && 480 Create(std::move(runtime_options)); 481} 482 483static jobject CreateSystemClassLoader(Runtime* runtime) { 484 if (runtime->IsAotCompiler() && !runtime->GetCompilerCallbacks()->IsBootImage()) { 485 return nullptr; 486 } 487 488 ScopedObjectAccess soa(Thread::Current()); 489 ClassLinker* cl = Runtime::Current()->GetClassLinker(); 490 auto pointer_size = cl->GetImagePointerSize(); 491 492 StackHandleScope<2> hs(soa.Self()); 493 Handle<mirror::Class> class_loader_class( 494 hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_ClassLoader))); 495 CHECK(cl->EnsureInitialized(soa.Self(), class_loader_class, true, true)); 496 497 ArtMethod* getSystemClassLoader = class_loader_class->FindDirectMethod( 498 "getSystemClassLoader", "()Ljava/lang/ClassLoader;", pointer_size); 499 CHECK(getSystemClassLoader != nullptr); 500 501 JValue result = InvokeWithJValues(soa, nullptr, soa.EncodeMethod(getSystemClassLoader), nullptr); 502 JNIEnv* env = soa.Self()->GetJniEnv(); 503 ScopedLocalRef<jobject> system_class_loader(env, soa.AddLocalReference<jobject>(result.GetL())); 504 CHECK(system_class_loader.get() != nullptr); 505 506 soa.Self()->SetClassLoaderOverride(system_class_loader.get()); 507 508 Handle<mirror::Class> thread_class( 509 hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_Thread))); 510 CHECK(cl->EnsureInitialized(soa.Self(), thread_class, true, true)); 511 512 ArtField* contextClassLoader = 513 thread_class->FindDeclaredInstanceField("contextClassLoader", "Ljava/lang/ClassLoader;"); 514 CHECK(contextClassLoader != nullptr); 515 516 // We can't run in a transaction yet. 517 contextClassLoader->SetObject<false>(soa.Self()->GetPeer(), 518 soa.Decode<mirror::ClassLoader*>(system_class_loader.get())); 519 520 return env->NewGlobalRef(system_class_loader.get()); 521} 522 523std::string Runtime::GetPatchoatExecutable() const { 524 if (!patchoat_executable_.empty()) { 525 return patchoat_executable_; 526 } 527 std::string patchoat_executable(GetAndroidRoot()); 528 patchoat_executable += (kIsDebugBuild ? "/bin/patchoatd" : "/bin/patchoat"); 529 return patchoat_executable; 530} 531 532std::string Runtime::GetCompilerExecutable() const { 533 if (!compiler_executable_.empty()) { 534 return compiler_executable_; 535 } 536 std::string compiler_executable(GetAndroidRoot()); 537 compiler_executable += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat"); 538 return compiler_executable; 539} 540 541bool Runtime::Start() { 542 VLOG(startup) << "Runtime::Start entering"; 543 544 CHECK(!no_sig_chain_) << "A started runtime should have sig chain enabled"; 545 546 // If a debug host build, disable ptrace restriction for debugging and test timeout thread dump. 547 // Only 64-bit as prctl() may fail in 32 bit userspace on a 64-bit kernel. 548#if defined(__linux__) && !defined(__ANDROID__) && defined(__x86_64__) 549 if (kIsDebugBuild) { 550 CHECK_EQ(prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY), 0); 551 } 552#endif 553 554 // Restore main thread state to kNative as expected by native code. 555 Thread* self = Thread::Current(); 556 557 self->TransitionFromRunnableToSuspended(kNative); 558 559 started_ = true; 560 561 // Create the JIT either if we have to use JIT compilation or save profiling info. 562 // TODO(calin): We use the JIT class as a proxy for JIT compilation and for 563 // recoding profiles. Maybe we should consider changing the name to be more clear it's 564 // not only about compiling. b/28295073. 565 if (jit_options_->UseJitCompilation() || jit_options_->GetSaveProfilingInfo()) { 566 std::string error_msg; 567 if (!IsZygote()) { 568 // If we are the zygote then we need to wait until after forking to create the code cache 569 // due to SELinux restrictions on r/w/x memory regions. 570 CreateJit(); 571 } else if (jit_options_->UseJitCompilation()) { 572 if (!jit::Jit::LoadCompilerLibrary(&error_msg)) { 573 // Try to load compiler pre zygote to reduce PSS. b/27744947 574 LOG(WARNING) << "Failed to load JIT compiler with error " << error_msg; 575 } 576 } 577 } 578 579 if (!IsImageDex2OatEnabled() || !GetHeap()->HasBootImageSpace()) { 580 ScopedObjectAccess soa(self); 581 StackHandleScope<1> hs(soa.Self()); 582 auto klass(hs.NewHandle<mirror::Class>(mirror::Class::GetJavaLangClass())); 583 class_linker_->EnsureInitialized(soa.Self(), klass, true, true); 584 } 585 586 // InitNativeMethods needs to be after started_ so that the classes 587 // it touches will have methods linked to the oat file if necessary. 588 { 589 ScopedTrace trace2("InitNativeMethods"); 590 InitNativeMethods(); 591 } 592 593 // Initialize well known thread group values that may be accessed threads while attaching. 594 InitThreadGroups(self); 595 596 Thread::FinishStartup(); 597 598 system_class_loader_ = CreateSystemClassLoader(this); 599 600 if (is_zygote_) { 601 if (!InitZygote()) { 602 return false; 603 } 604 } else { 605 if (is_native_bridge_loaded_) { 606 PreInitializeNativeBridge("."); 607 } 608 NativeBridgeAction action = force_native_bridge_ 609 ? NativeBridgeAction::kInitialize 610 : NativeBridgeAction::kUnload; 611 InitNonZygoteOrPostFork(self->GetJniEnv(), 612 /* is_system_server */ false, 613 action, 614 GetInstructionSetString(kRuntimeISA)); 615 } 616 617 StartDaemonThreads(); 618 619 { 620 ScopedObjectAccess soa(self); 621 self->GetJniEnv()->locals.AssertEmpty(); 622 } 623 624 VLOG(startup) << "Runtime::Start exiting"; 625 finished_starting_ = true; 626 627 if (profiler_options_.IsEnabled() && !profile_output_filename_.empty()) { 628 // User has asked for a profile using -Xenable-profiler. 629 // Create the profile file if it doesn't exist. 630 int fd = open(profile_output_filename_.c_str(), O_RDWR|O_CREAT|O_EXCL, 0660); 631 if (fd >= 0) { 632 close(fd); 633 } else if (errno != EEXIST) { 634 LOG(WARNING) << "Failed to access the profile file. Profiler disabled."; 635 } 636 } 637 638 if (trace_config_.get() != nullptr && trace_config_->trace_file != "") { 639 ScopedThreadStateChange tsc(self, kWaitingForMethodTracingStart); 640 Trace::Start(trace_config_->trace_file.c_str(), 641 -1, 642 static_cast<int>(trace_config_->trace_file_size), 643 0, 644 trace_config_->trace_output_mode, 645 trace_config_->trace_mode, 646 0); 647 } 648 649 return true; 650} 651 652void Runtime::EndThreadBirth() REQUIRES(Locks::runtime_shutdown_lock_) { 653 DCHECK_GT(threads_being_born_, 0U); 654 threads_being_born_--; 655 if (shutting_down_started_ && threads_being_born_ == 0) { 656 shutdown_cond_->Broadcast(Thread::Current()); 657 } 658} 659 660// Do zygote-mode-only initialization. 661bool Runtime::InitZygote() { 662#ifdef __linux__ 663 // zygote goes into its own process group 664 setpgid(0, 0); 665 666 // See storage config details at http://source.android.com/tech/storage/ 667 // Create private mount namespace shared by all children 668 if (unshare(CLONE_NEWNS) == -1) { 669 PLOG(ERROR) << "Failed to unshare()"; 670 return false; 671 } 672 673 // Mark rootfs as being a slave so that changes from default 674 // namespace only flow into our children. 675 if (mount("rootfs", "/", nullptr, (MS_SLAVE | MS_REC), nullptr) == -1) { 676 PLOG(ERROR) << "Failed to mount() rootfs as MS_SLAVE"; 677 return false; 678 } 679 680 // Create a staging tmpfs that is shared by our children; they will 681 // bind mount storage into their respective private namespaces, which 682 // are isolated from each other. 683 const char* target_base = getenv("EMULATED_STORAGE_TARGET"); 684 if (target_base != nullptr) { 685 if (mount("tmpfs", target_base, "tmpfs", MS_NOSUID | MS_NODEV, 686 "uid=0,gid=1028,mode=0751") == -1) { 687 PLOG(ERROR) << "Failed to mount tmpfs to " << target_base; 688 return false; 689 } 690 } 691 692 return true; 693#else 694 UNIMPLEMENTED(FATAL); 695 return false; 696#endif 697} 698 699void Runtime::InitNonZygoteOrPostFork( 700 JNIEnv* env, bool is_system_server, NativeBridgeAction action, const char* isa) { 701 is_zygote_ = false; 702 703 if (is_native_bridge_loaded_) { 704 switch (action) { 705 case NativeBridgeAction::kUnload: 706 UnloadNativeBridge(); 707 is_native_bridge_loaded_ = false; 708 break; 709 710 case NativeBridgeAction::kInitialize: 711 InitializeNativeBridge(env, isa); 712 break; 713 } 714 } 715 716 // Create the thread pools. 717 heap_->CreateThreadPool(); 718 // Reset the gc performance data at zygote fork so that the GCs 719 // before fork aren't attributed to an app. 720 heap_->ResetGcPerformanceInfo(); 721 722 723 if (!is_system_server && 724 !safe_mode_ && 725 (jit_options_->UseJitCompilation() || jit_options_->GetSaveProfilingInfo()) && 726 jit_.get() == nullptr) { 727 // Note that when running ART standalone (not zygote, nor zygote fork), 728 // the jit may have already been created. 729 CreateJit(); 730 } 731 732 StartSignalCatcher(); 733 734 // Start the JDWP thread. If the command-line debugger flags specified "suspend=y", 735 // this will pause the runtime, so we probably want this to come last. 736 Dbg::StartJdwp(); 737} 738 739void Runtime::StartSignalCatcher() { 740 if (!is_zygote_) { 741 signal_catcher_ = new SignalCatcher(stack_trace_file_); 742 } 743} 744 745bool Runtime::IsShuttingDown(Thread* self) { 746 MutexLock mu(self, *Locks::runtime_shutdown_lock_); 747 return IsShuttingDownLocked(); 748} 749 750bool Runtime::IsDebuggable() const { 751 const OatFile* oat_file = GetOatFileManager().GetPrimaryOatFile(); 752 return oat_file != nullptr && oat_file->IsDebuggable(); 753} 754 755void Runtime::StartDaemonThreads() { 756 ScopedTrace trace(__FUNCTION__); 757 VLOG(startup) << "Runtime::StartDaemonThreads entering"; 758 759 Thread* self = Thread::Current(); 760 761 // Must be in the kNative state for calling native methods. 762 CHECK_EQ(self->GetState(), kNative); 763 764 JNIEnv* env = self->GetJniEnv(); 765 env->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons, 766 WellKnownClasses::java_lang_Daemons_start); 767 if (env->ExceptionCheck()) { 768 env->ExceptionDescribe(); 769 LOG(FATAL) << "Error starting java.lang.Daemons"; 770 } 771 772 VLOG(startup) << "Runtime::StartDaemonThreads exiting"; 773} 774 775// Attempts to open dex files from image(s). Given the image location, try to find the oat file 776// and open it to get the stored dex file. If the image is the first for a multi-image boot 777// classpath, go on and also open the other images. 778static bool OpenDexFilesFromImage(const std::string& image_location, 779 std::vector<std::unique_ptr<const DexFile>>* dex_files, 780 size_t* failures) { 781 DCHECK(dex_files != nullptr) << "OpenDexFilesFromImage: out-param is nullptr"; 782 783 // Use a work-list approach, so that we can easily reuse the opening code. 784 std::vector<std::string> image_locations; 785 image_locations.push_back(image_location); 786 787 for (size_t index = 0; index < image_locations.size(); ++index) { 788 std::string system_filename; 789 bool has_system = false; 790 std::string cache_filename_unused; 791 bool dalvik_cache_exists_unused; 792 bool has_cache_unused; 793 bool is_global_cache_unused; 794 bool found_image = gc::space::ImageSpace::FindImageFilename(image_locations[index].c_str(), 795 kRuntimeISA, 796 &system_filename, 797 &has_system, 798 &cache_filename_unused, 799 &dalvik_cache_exists_unused, 800 &has_cache_unused, 801 &is_global_cache_unused); 802 803 if (!found_image || !has_system) { 804 return false; 805 } 806 807 // We are falling back to non-executable use of the oat file because patching failed, presumably 808 // due to lack of space. 809 std::string oat_filename = 810 ImageHeader::GetOatLocationFromImageLocation(system_filename.c_str()); 811 std::string oat_location = 812 ImageHeader::GetOatLocationFromImageLocation(image_locations[index].c_str()); 813 // Note: in the multi-image case, the image location may end in ".jar," and not ".art." Handle 814 // that here. 815 if (EndsWith(oat_location, ".jar")) { 816 oat_location.replace(oat_location.length() - 3, 3, "oat"); 817 } 818 819 std::unique_ptr<File> file(OS::OpenFileForReading(oat_filename.c_str())); 820 if (file.get() == nullptr) { 821 return false; 822 } 823 std::string error_msg; 824 std::unique_ptr<ElfFile> elf_file(ElfFile::Open(file.release(), 825 false, 826 false, 827 /*low_4gb*/false, 828 &error_msg)); 829 if (elf_file.get() == nullptr) { 830 return false; 831 } 832 std::unique_ptr<const OatFile> oat_file( 833 OatFile::OpenWithElfFile(elf_file.release(), oat_location, nullptr, &error_msg)); 834 if (oat_file == nullptr) { 835 LOG(WARNING) << "Unable to use '" << oat_filename << "' because " << error_msg; 836 return false; 837 } 838 839 for (const OatFile::OatDexFile* oat_dex_file : oat_file->GetOatDexFiles()) { 840 if (oat_dex_file == nullptr) { 841 *failures += 1; 842 continue; 843 } 844 std::unique_ptr<const DexFile> dex_file = oat_dex_file->OpenDexFile(&error_msg); 845 if (dex_file.get() == nullptr) { 846 *failures += 1; 847 } else { 848 dex_files->push_back(std::move(dex_file)); 849 } 850 } 851 852 if (index == 0) { 853 // First file. See if this is a multi-image environment, and if so, enqueue the other images. 854 const OatHeader& boot_oat_header = oat_file->GetOatHeader(); 855 const char* boot_cp = boot_oat_header.GetStoreValueByKey(OatHeader::kBootClassPath); 856 if (boot_cp != nullptr) { 857 gc::space::ImageSpace::CreateMultiImageLocations(image_locations[0], 858 boot_cp, 859 &image_locations); 860 } 861 } 862 863 Runtime::Current()->GetOatFileManager().RegisterOatFile(std::move(oat_file)); 864 } 865 return true; 866} 867 868 869static size_t OpenDexFiles(const std::vector<std::string>& dex_filenames, 870 const std::vector<std::string>& dex_locations, 871 const std::string& image_location, 872 std::vector<std::unique_ptr<const DexFile>>* dex_files) { 873 DCHECK(dex_files != nullptr) << "OpenDexFiles: out-param is nullptr"; 874 size_t failure_count = 0; 875 if (!image_location.empty() && OpenDexFilesFromImage(image_location, dex_files, &failure_count)) { 876 return failure_count; 877 } 878 failure_count = 0; 879 for (size_t i = 0; i < dex_filenames.size(); i++) { 880 const char* dex_filename = dex_filenames[i].c_str(); 881 const char* dex_location = dex_locations[i].c_str(); 882 std::string error_msg; 883 if (!OS::FileExists(dex_filename)) { 884 LOG(WARNING) << "Skipping non-existent dex file '" << dex_filename << "'"; 885 continue; 886 } 887 if (!DexFile::Open(dex_filename, dex_location, &error_msg, dex_files)) { 888 LOG(WARNING) << "Failed to open .dex from file '" << dex_filename << "': " << error_msg; 889 ++failure_count; 890 } 891 } 892 return failure_count; 893} 894 895void Runtime::SetSentinel(mirror::Object* sentinel) { 896 CHECK(sentinel_.Read() == nullptr); 897 CHECK(sentinel != nullptr); 898 CHECK(!heap_->IsMovableObject(sentinel)); 899 sentinel_ = GcRoot<mirror::Object>(sentinel); 900} 901 902bool Runtime::Init(RuntimeArgumentMap&& runtime_options_in) { 903 RuntimeArgumentMap runtime_options(std::move(runtime_options_in)); 904 ScopedTrace trace(__FUNCTION__); 905 CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize); 906 907 MemMap::Init(); 908 909 using Opt = RuntimeArgumentMap; 910 VLOG(startup) << "Runtime::Init -verbose:startup enabled"; 911 912 QuasiAtomic::Startup(); 913 914 oat_file_manager_ = new OatFileManager; 915 916 Thread::SetSensitiveThreadHook(runtime_options.GetOrDefault(Opt::HookIsSensitiveThread)); 917 Monitor::Init(runtime_options.GetOrDefault(Opt::LockProfThreshold)); 918 919 boot_class_path_string_ = runtime_options.ReleaseOrDefault(Opt::BootClassPath); 920 class_path_string_ = runtime_options.ReleaseOrDefault(Opt::ClassPath); 921 properties_ = runtime_options.ReleaseOrDefault(Opt::PropertiesList); 922 923 compiler_callbacks_ = runtime_options.GetOrDefault(Opt::CompilerCallbacksPtr); 924 patchoat_executable_ = runtime_options.ReleaseOrDefault(Opt::PatchOat); 925 must_relocate_ = runtime_options.GetOrDefault(Opt::Relocate); 926 is_zygote_ = runtime_options.Exists(Opt::Zygote); 927 is_explicit_gc_disabled_ = runtime_options.Exists(Opt::DisableExplicitGC); 928 dex2oat_enabled_ = runtime_options.GetOrDefault(Opt::Dex2Oat); 929 image_dex2oat_enabled_ = runtime_options.GetOrDefault(Opt::ImageDex2Oat); 930 dump_native_stack_on_sig_quit_ = runtime_options.GetOrDefault(Opt::DumpNativeStackOnSigQuit); 931 932 vfprintf_ = runtime_options.GetOrDefault(Opt::HookVfprintf); 933 exit_ = runtime_options.GetOrDefault(Opt::HookExit); 934 abort_ = runtime_options.GetOrDefault(Opt::HookAbort); 935 936 default_stack_size_ = runtime_options.GetOrDefault(Opt::StackSize); 937 stack_trace_file_ = runtime_options.ReleaseOrDefault(Opt::StackTraceFile); 938 939 compiler_executable_ = runtime_options.ReleaseOrDefault(Opt::Compiler); 940 compiler_options_ = runtime_options.ReleaseOrDefault(Opt::CompilerOptions); 941 image_compiler_options_ = runtime_options.ReleaseOrDefault(Opt::ImageCompilerOptions); 942 image_location_ = runtime_options.GetOrDefault(Opt::Image); 943 944 max_spins_before_thin_lock_inflation_ = 945 runtime_options.GetOrDefault(Opt::MaxSpinsBeforeThinLockInflation); 946 947 monitor_list_ = new MonitorList; 948 monitor_pool_ = MonitorPool::Create(); 949 thread_list_ = new ThreadList; 950 intern_table_ = new InternTable; 951 952 verify_ = runtime_options.GetOrDefault(Opt::Verify); 953 allow_dex_file_fallback_ = !runtime_options.Exists(Opt::NoDexFileFallback); 954 955 no_sig_chain_ = runtime_options.Exists(Opt::NoSigChain); 956 force_native_bridge_ = runtime_options.Exists(Opt::ForceNativeBridge); 957 958 Split(runtime_options.GetOrDefault(Opt::CpuAbiList), ',', &cpu_abilist_); 959 960 fingerprint_ = runtime_options.ReleaseOrDefault(Opt::Fingerprint); 961 962 if (runtime_options.GetOrDefault(Opt::Interpret)) { 963 GetInstrumentation()->ForceInterpretOnly(); 964 } 965 966 zygote_max_failed_boots_ = runtime_options.GetOrDefault(Opt::ZygoteMaxFailedBoots); 967 experimental_flags_ = runtime_options.GetOrDefault(Opt::Experimental); 968 is_low_memory_mode_ = runtime_options.Exists(Opt::LowMemoryMode); 969 970 { 971 CompilerFilter::Filter filter; 972 std::string filter_str = runtime_options.GetOrDefault(Opt::OatFileManagerCompilerFilter); 973 if (!CompilerFilter::ParseCompilerFilter(filter_str.c_str(), &filter)) { 974 LOG(ERROR) << "Cannot parse compiler filter " << filter_str; 975 return false; 976 } 977 OatFileManager::SetCompilerFilter(filter); 978 } 979 980 XGcOption xgc_option = runtime_options.GetOrDefault(Opt::GcOption); 981 heap_ = new gc::Heap(runtime_options.GetOrDefault(Opt::MemoryInitialSize), 982 runtime_options.GetOrDefault(Opt::HeapGrowthLimit), 983 runtime_options.GetOrDefault(Opt::HeapMinFree), 984 runtime_options.GetOrDefault(Opt::HeapMaxFree), 985 runtime_options.GetOrDefault(Opt::HeapTargetUtilization), 986 runtime_options.GetOrDefault(Opt::ForegroundHeapGrowthMultiplier), 987 runtime_options.GetOrDefault(Opt::MemoryMaximumSize), 988 runtime_options.GetOrDefault(Opt::NonMovingSpaceCapacity), 989 runtime_options.GetOrDefault(Opt::Image), 990 runtime_options.GetOrDefault(Opt::ImageInstructionSet), 991 xgc_option.collector_type_, 992 runtime_options.GetOrDefault(Opt::BackgroundGc), 993 runtime_options.GetOrDefault(Opt::LargeObjectSpace), 994 runtime_options.GetOrDefault(Opt::LargeObjectThreshold), 995 runtime_options.GetOrDefault(Opt::ParallelGCThreads), 996 runtime_options.GetOrDefault(Opt::ConcGCThreads), 997 runtime_options.Exists(Opt::LowMemoryMode), 998 runtime_options.GetOrDefault(Opt::LongPauseLogThreshold), 999 runtime_options.GetOrDefault(Opt::LongGCLogThreshold), 1000 runtime_options.Exists(Opt::IgnoreMaxFootprint), 1001 runtime_options.GetOrDefault(Opt::UseTLAB), 1002 xgc_option.verify_pre_gc_heap_, 1003 xgc_option.verify_pre_sweeping_heap_, 1004 xgc_option.verify_post_gc_heap_, 1005 xgc_option.verify_pre_gc_rosalloc_, 1006 xgc_option.verify_pre_sweeping_rosalloc_, 1007 xgc_option.verify_post_gc_rosalloc_, 1008 xgc_option.gcstress_, 1009 runtime_options.GetOrDefault(Opt::EnableHSpaceCompactForOOM), 1010 runtime_options.GetOrDefault(Opt::HSpaceCompactForOOMMinIntervalsMs)); 1011 1012 if (!heap_->HasBootImageSpace() && !allow_dex_file_fallback_) { 1013 LOG(ERROR) << "Dex file fallback disabled, cannot continue without image."; 1014 return false; 1015 } 1016 1017 dump_gc_performance_on_shutdown_ = runtime_options.Exists(Opt::DumpGCPerformanceOnShutdown); 1018 1019 if (runtime_options.Exists(Opt::JdwpOptions)) { 1020 Dbg::ConfigureJdwp(runtime_options.GetOrDefault(Opt::JdwpOptions)); 1021 } 1022 1023 jit_options_.reset(jit::JitOptions::CreateFromRuntimeArguments(runtime_options)); 1024 if (IsAotCompiler()) { 1025 // If we are already the compiler at this point, we must be dex2oat. Don't create the jit in 1026 // this case. 1027 // If runtime_options doesn't have UseJIT set to true then CreateFromRuntimeArguments returns 1028 // null and we don't create the jit. 1029 jit_options_->SetUseJitCompilation(false); 1030 jit_options_->SetSaveProfilingInfo(false); 1031 } 1032 1033 // Allocate a global table of boxed lambda objects <-> closures. 1034 lambda_box_table_ = MakeUnique<lambda::BoxTable>(); 1035 1036 // Use MemMap arena pool for jit, malloc otherwise. Malloc arenas are faster to allocate but 1037 // can't be trimmed as easily. 1038 const bool use_malloc = IsAotCompiler(); 1039 arena_pool_.reset(new ArenaPool(use_malloc, /* low_4gb */ false)); 1040 jit_arena_pool_.reset( 1041 new ArenaPool(/* use_malloc */ false, /* low_4gb */ false, "CompilerMetadata")); 1042 1043 if (IsAotCompiler() && Is64BitInstructionSet(kRuntimeISA)) { 1044 // 4gb, no malloc. Explanation in header. 1045 low_4gb_arena_pool_.reset(new ArenaPool(/* use_malloc */ false, /* low_4gb */ true)); 1046 } 1047 linear_alloc_.reset(CreateLinearAlloc()); 1048 1049 BlockSignals(); 1050 InitPlatformSignalHandlers(); 1051 1052 // Change the implicit checks flags based on runtime architecture. 1053 switch (kRuntimeISA) { 1054 case kArm: 1055 case kThumb2: 1056 case kX86: 1057 case kArm64: 1058 case kX86_64: 1059 case kMips: 1060 case kMips64: 1061 implicit_null_checks_ = true; 1062 // Installing stack protection does not play well with valgrind. 1063 implicit_so_checks_ = !(RUNNING_ON_MEMORY_TOOL && kMemoryToolIsValgrind); 1064 break; 1065 default: 1066 // Keep the defaults. 1067 break; 1068 } 1069 1070 if (!no_sig_chain_) { 1071 // Dex2Oat's Runtime does not need the signal chain or the fault handler. 1072 1073 // Initialize the signal chain so that any calls to sigaction get 1074 // correctly routed to the next in the chain regardless of whether we 1075 // have claimed the signal or not. 1076 InitializeSignalChain(); 1077 1078 if (implicit_null_checks_ || implicit_so_checks_ || implicit_suspend_checks_) { 1079 fault_manager.Init(); 1080 1081 // These need to be in a specific order. The null point check handler must be 1082 // after the suspend check and stack overflow check handlers. 1083 // 1084 // Note: the instances attach themselves to the fault manager and are handled by it. The manager 1085 // will delete the instance on Shutdown(). 1086 if (implicit_suspend_checks_) { 1087 new SuspensionHandler(&fault_manager); 1088 } 1089 1090 if (implicit_so_checks_) { 1091 new StackOverflowHandler(&fault_manager); 1092 } 1093 1094 if (implicit_null_checks_) { 1095 new NullPointerHandler(&fault_manager); 1096 } 1097 1098 if (kEnableJavaStackTraceHandler) { 1099 new JavaStackTraceHandler(&fault_manager); 1100 } 1101 } 1102 } 1103 1104 java_vm_ = new JavaVMExt(this, runtime_options); 1105 1106 Thread::Startup(); 1107 1108 // ClassLinker needs an attached thread, but we can't fully attach a thread without creating 1109 // objects. We can't supply a thread group yet; it will be fixed later. Since we are the main 1110 // thread, we do not get a java peer. 1111 Thread* self = Thread::Attach("main", false, nullptr, false); 1112 CHECK_EQ(self->GetThreadId(), ThreadList::kMainThreadId); 1113 CHECK(self != nullptr); 1114 1115 // Set us to runnable so tools using a runtime can allocate and GC by default 1116 self->TransitionFromSuspendedToRunnable(); 1117 1118 // Now we're attached, we can take the heap locks and validate the heap. 1119 GetHeap()->EnableObjectValidation(); 1120 1121 CHECK_GE(GetHeap()->GetContinuousSpaces().size(), 1U); 1122 class_linker_ = new ClassLinker(intern_table_); 1123 if (GetHeap()->HasBootImageSpace()) { 1124 std::string error_msg; 1125 bool result = class_linker_->InitFromBootImage(&error_msg); 1126 if (!result) { 1127 LOG(ERROR) << "Could not initialize from image: " << error_msg; 1128 return false; 1129 } 1130 if (kIsDebugBuild) { 1131 for (auto image_space : GetHeap()->GetBootImageSpaces()) { 1132 image_space->VerifyImageAllocations(); 1133 } 1134 } 1135 if (boot_class_path_string_.empty()) { 1136 // The bootclasspath is not explicitly specified: construct it from the loaded dex files. 1137 const std::vector<const DexFile*>& boot_class_path = GetClassLinker()->GetBootClassPath(); 1138 std::vector<std::string> dex_locations; 1139 dex_locations.reserve(boot_class_path.size()); 1140 for (const DexFile* dex_file : boot_class_path) { 1141 dex_locations.push_back(dex_file->GetLocation()); 1142 } 1143 boot_class_path_string_ = Join(dex_locations, ':'); 1144 } 1145 { 1146 ScopedTrace trace2("AddImageStringsToTable"); 1147 GetInternTable()->AddImagesStringsToTable(heap_->GetBootImageSpaces()); 1148 } 1149 { 1150 ScopedTrace trace2("MoveImageClassesToClassTable"); 1151 GetClassLinker()->AddBootImageClassesToClassTable(); 1152 } 1153 } else { 1154 std::vector<std::string> dex_filenames; 1155 Split(boot_class_path_string_, ':', &dex_filenames); 1156 1157 std::vector<std::string> dex_locations; 1158 if (!runtime_options.Exists(Opt::BootClassPathLocations)) { 1159 dex_locations = dex_filenames; 1160 } else { 1161 dex_locations = runtime_options.GetOrDefault(Opt::BootClassPathLocations); 1162 CHECK_EQ(dex_filenames.size(), dex_locations.size()); 1163 } 1164 1165 std::vector<std::unique_ptr<const DexFile>> boot_class_path; 1166 if (runtime_options.Exists(Opt::BootClassPathDexList)) { 1167 boot_class_path.swap(*runtime_options.GetOrDefault(Opt::BootClassPathDexList)); 1168 } else { 1169 OpenDexFiles(dex_filenames, 1170 dex_locations, 1171 runtime_options.GetOrDefault(Opt::Image), 1172 &boot_class_path); 1173 } 1174 instruction_set_ = runtime_options.GetOrDefault(Opt::ImageInstructionSet); 1175 std::string error_msg; 1176 if (!class_linker_->InitWithoutImage(std::move(boot_class_path), &error_msg)) { 1177 LOG(ERROR) << "Could not initialize without image: " << error_msg; 1178 return false; 1179 } 1180 1181 // TODO: Should we move the following to InitWithoutImage? 1182 SetInstructionSet(instruction_set_); 1183 for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) { 1184 Runtime::CalleeSaveType type = Runtime::CalleeSaveType(i); 1185 if (!HasCalleeSaveMethod(type)) { 1186 SetCalleeSaveMethod(CreateCalleeSaveMethod(), type); 1187 } 1188 } 1189 } 1190 1191 CHECK(class_linker_ != nullptr); 1192 1193 verifier::MethodVerifier::Init(); 1194 1195 if (runtime_options.Exists(Opt::MethodTrace)) { 1196 trace_config_.reset(new TraceConfig()); 1197 trace_config_->trace_file = runtime_options.ReleaseOrDefault(Opt::MethodTraceFile); 1198 trace_config_->trace_file_size = runtime_options.ReleaseOrDefault(Opt::MethodTraceFileSize); 1199 trace_config_->trace_mode = Trace::TraceMode::kMethodTracing; 1200 trace_config_->trace_output_mode = runtime_options.Exists(Opt::MethodTraceStreaming) ? 1201 Trace::TraceOutputMode::kStreaming : 1202 Trace::TraceOutputMode::kFile; 1203 } 1204 1205 { 1206 auto&& profiler_options = runtime_options.ReleaseOrDefault(Opt::ProfilerOpts); 1207 profile_output_filename_ = profiler_options.output_file_name_; 1208 1209 // TODO: Don't do this, just change ProfilerOptions to include the output file name? 1210 ProfilerOptions other_options( 1211 profiler_options.enabled_, 1212 profiler_options.period_s_, 1213 profiler_options.duration_s_, 1214 profiler_options.interval_us_, 1215 profiler_options.backoff_coefficient_, 1216 profiler_options.start_immediately_, 1217 profiler_options.top_k_threshold_, 1218 profiler_options.top_k_change_threshold_, 1219 profiler_options.profile_type_, 1220 profiler_options.max_stack_depth_); 1221 1222 profiler_options_ = other_options; 1223 } 1224 1225 // TODO: move this to just be an Trace::Start argument 1226 Trace::SetDefaultClockSource(runtime_options.GetOrDefault(Opt::ProfileClock)); 1227 1228 // Pre-allocate an OutOfMemoryError for the double-OOME case. 1229 self->ThrowNewException("Ljava/lang/OutOfMemoryError;", 1230 "OutOfMemoryError thrown while trying to throw OutOfMemoryError; " 1231 "no stack trace available"); 1232 pre_allocated_OutOfMemoryError_ = GcRoot<mirror::Throwable>(self->GetException()); 1233 self->ClearException(); 1234 1235 // Pre-allocate a NoClassDefFoundError for the common case of failing to find a system class 1236 // ahead of checking the application's class loader. 1237 self->ThrowNewException("Ljava/lang/NoClassDefFoundError;", 1238 "Class not found using the boot class loader; no stack trace available"); 1239 pre_allocated_NoClassDefFoundError_ = GcRoot<mirror::Throwable>(self->GetException()); 1240 self->ClearException(); 1241 1242 // Look for a native bridge. 1243 // 1244 // The intended flow here is, in the case of a running system: 1245 // 1246 // Runtime::Init() (zygote): 1247 // LoadNativeBridge -> dlopen from cmd line parameter. 1248 // | 1249 // V 1250 // Runtime::Start() (zygote): 1251 // No-op wrt native bridge. 1252 // | 1253 // | start app 1254 // V 1255 // DidForkFromZygote(action) 1256 // action = kUnload -> dlclose native bridge. 1257 // action = kInitialize -> initialize library 1258 // 1259 // 1260 // The intended flow here is, in the case of a simple dalvikvm call: 1261 // 1262 // Runtime::Init(): 1263 // LoadNativeBridge -> dlopen from cmd line parameter. 1264 // | 1265 // V 1266 // Runtime::Start(): 1267 // DidForkFromZygote(kInitialize) -> try to initialize any native bridge given. 1268 // No-op wrt native bridge. 1269 { 1270 std::string native_bridge_file_name = runtime_options.ReleaseOrDefault(Opt::NativeBridge); 1271 is_native_bridge_loaded_ = LoadNativeBridge(native_bridge_file_name); 1272 } 1273 1274 VLOG(startup) << "Runtime::Init exiting"; 1275 1276 return true; 1277} 1278 1279void Runtime::InitNativeMethods() { 1280 VLOG(startup) << "Runtime::InitNativeMethods entering"; 1281 Thread* self = Thread::Current(); 1282 JNIEnv* env = self->GetJniEnv(); 1283 1284 // Must be in the kNative state for calling native methods (JNI_OnLoad code). 1285 CHECK_EQ(self->GetState(), kNative); 1286 1287 // First set up JniConstants, which is used by both the runtime's built-in native 1288 // methods and libcore. 1289 JniConstants::init(env); 1290 1291 // Then set up the native methods provided by the runtime itself. 1292 RegisterRuntimeNativeMethods(env); 1293 1294 // Initialize classes used in JNI. The initialization requires runtime native 1295 // methods to be loaded first. 1296 WellKnownClasses::Init(env); 1297 1298 // Then set up libjavacore / libopenjdk, which are just a regular JNI libraries with 1299 // a regular JNI_OnLoad. Most JNI libraries can just use System.loadLibrary, but 1300 // libcore can't because it's the library that implements System.loadLibrary! 1301 { 1302 std::string error_msg; 1303 if (!java_vm_->LoadNativeLibrary(env, "libjavacore.so", nullptr, nullptr, &error_msg)) { 1304 LOG(FATAL) << "LoadNativeLibrary failed for \"libjavacore.so\": " << error_msg; 1305 } 1306 } 1307 { 1308 constexpr const char* kOpenJdkLibrary = kIsDebugBuild 1309 ? "libopenjdkd.so" 1310 : "libopenjdk.so"; 1311 std::string error_msg; 1312 if (!java_vm_->LoadNativeLibrary(env, kOpenJdkLibrary, nullptr, nullptr, &error_msg)) { 1313 LOG(FATAL) << "LoadNativeLibrary failed for \"" << kOpenJdkLibrary << "\": " << error_msg; 1314 } 1315 } 1316 1317 // Initialize well known classes that may invoke runtime native methods. 1318 WellKnownClasses::LateInit(env); 1319 1320 VLOG(startup) << "Runtime::InitNativeMethods exiting"; 1321} 1322 1323void Runtime::ReclaimArenaPoolMemory() { 1324 arena_pool_->LockReclaimMemory(); 1325} 1326 1327void Runtime::InitThreadGroups(Thread* self) { 1328 JNIEnvExt* env = self->GetJniEnv(); 1329 ScopedJniEnvLocalRefState env_state(env); 1330 main_thread_group_ = 1331 env->NewGlobalRef(env->GetStaticObjectField( 1332 WellKnownClasses::java_lang_ThreadGroup, 1333 WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup)); 1334 CHECK(main_thread_group_ != nullptr || IsAotCompiler()); 1335 system_thread_group_ = 1336 env->NewGlobalRef(env->GetStaticObjectField( 1337 WellKnownClasses::java_lang_ThreadGroup, 1338 WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup)); 1339 CHECK(system_thread_group_ != nullptr || IsAotCompiler()); 1340} 1341 1342jobject Runtime::GetMainThreadGroup() const { 1343 CHECK(main_thread_group_ != nullptr || IsAotCompiler()); 1344 return main_thread_group_; 1345} 1346 1347jobject Runtime::GetSystemThreadGroup() const { 1348 CHECK(system_thread_group_ != nullptr || IsAotCompiler()); 1349 return system_thread_group_; 1350} 1351 1352jobject Runtime::GetSystemClassLoader() const { 1353 CHECK(system_class_loader_ != nullptr || IsAotCompiler()); 1354 return system_class_loader_; 1355} 1356 1357void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) { 1358 register_dalvik_system_DexFile(env); 1359 register_dalvik_system_VMDebug(env); 1360 register_dalvik_system_VMRuntime(env); 1361 register_dalvik_system_VMStack(env); 1362 register_dalvik_system_ZygoteHooks(env); 1363 register_java_lang_Class(env); 1364 register_java_lang_DexCache(env); 1365 register_java_lang_Object(env); 1366 register_java_lang_ref_FinalizerReference(env); 1367 register_java_lang_reflect_AbstractMethod(env); 1368 register_java_lang_reflect_Array(env); 1369 register_java_lang_reflect_Constructor(env); 1370 register_java_lang_reflect_Field(env); 1371 register_java_lang_reflect_Method(env); 1372 register_java_lang_reflect_Proxy(env); 1373 register_java_lang_ref_Reference(env); 1374 register_java_lang_String(env); 1375 register_java_lang_StringFactory(env); 1376 register_java_lang_System(env); 1377 register_java_lang_Thread(env); 1378 register_java_lang_Throwable(env); 1379 register_java_lang_VMClassLoader(env); 1380 register_java_util_concurrent_atomic_AtomicLong(env); 1381 register_libcore_util_CharsetUtils(env); 1382 register_org_apache_harmony_dalvik_ddmc_DdmServer(env); 1383 register_org_apache_harmony_dalvik_ddmc_DdmVmInternal(env); 1384 register_sun_misc_Unsafe(env); 1385} 1386 1387void Runtime::DumpForSigQuit(std::ostream& os) { 1388 // Dumping for SIGQIT may cause deadlocks if the the debugger is active. b/26118154 1389 if (Dbg::IsDebuggerActive()) { 1390 LOG(INFO) << "Skipping DumpForSigQuit due to active debugger"; 1391 return; 1392 } 1393 GetClassLinker()->DumpForSigQuit(os); 1394 GetInternTable()->DumpForSigQuit(os); 1395 GetJavaVM()->DumpForSigQuit(os); 1396 GetHeap()->DumpForSigQuit(os); 1397 oat_file_manager_->DumpForSigQuit(os); 1398 if (GetJit() != nullptr) { 1399 GetJit()->DumpForSigQuit(os); 1400 } else { 1401 os << "Running non JIT\n"; 1402 } 1403 TrackedAllocators::Dump(os); 1404 os << "\n"; 1405 1406 thread_list_->DumpForSigQuit(os); 1407 BaseMutex::DumpAll(os); 1408} 1409 1410void Runtime::DumpLockHolders(std::ostream& os) { 1411 uint64_t mutator_lock_owner = Locks::mutator_lock_->GetExclusiveOwnerTid(); 1412 pid_t thread_list_lock_owner = GetThreadList()->GetLockOwner(); 1413 pid_t classes_lock_owner = GetClassLinker()->GetClassesLockOwner(); 1414 pid_t dex_lock_owner = GetClassLinker()->GetDexLockOwner(); 1415 if ((thread_list_lock_owner | classes_lock_owner | dex_lock_owner) != 0) { 1416 os << "Mutator lock exclusive owner tid: " << mutator_lock_owner << "\n" 1417 << "ThreadList lock owner tid: " << thread_list_lock_owner << "\n" 1418 << "ClassLinker classes lock owner tid: " << classes_lock_owner << "\n" 1419 << "ClassLinker dex lock owner tid: " << dex_lock_owner << "\n"; 1420 } 1421} 1422 1423void Runtime::SetStatsEnabled(bool new_state) { 1424 Thread* self = Thread::Current(); 1425 MutexLock mu(self, *Locks::instrument_entrypoints_lock_); 1426 if (new_state == true) { 1427 GetStats()->Clear(~0); 1428 // TODO: wouldn't it make more sense to clear _all_ threads' stats? 1429 self->GetStats()->Clear(~0); 1430 if (stats_enabled_ != new_state) { 1431 GetInstrumentation()->InstrumentQuickAllocEntryPointsLocked(); 1432 } 1433 } else if (stats_enabled_ != new_state) { 1434 GetInstrumentation()->UninstrumentQuickAllocEntryPointsLocked(); 1435 } 1436 stats_enabled_ = new_state; 1437} 1438 1439void Runtime::ResetStats(int kinds) { 1440 GetStats()->Clear(kinds & 0xffff); 1441 // TODO: wouldn't it make more sense to clear _all_ threads' stats? 1442 Thread::Current()->GetStats()->Clear(kinds >> 16); 1443} 1444 1445int32_t Runtime::GetStat(int kind) { 1446 RuntimeStats* stats; 1447 if (kind < (1<<16)) { 1448 stats = GetStats(); 1449 } else { 1450 stats = Thread::Current()->GetStats(); 1451 kind >>= 16; 1452 } 1453 switch (kind) { 1454 case KIND_ALLOCATED_OBJECTS: 1455 return stats->allocated_objects; 1456 case KIND_ALLOCATED_BYTES: 1457 return stats->allocated_bytes; 1458 case KIND_FREED_OBJECTS: 1459 return stats->freed_objects; 1460 case KIND_FREED_BYTES: 1461 return stats->freed_bytes; 1462 case KIND_GC_INVOCATIONS: 1463 return stats->gc_for_alloc_count; 1464 case KIND_CLASS_INIT_COUNT: 1465 return stats->class_init_count; 1466 case KIND_CLASS_INIT_TIME: 1467 // Convert ns to us, reduce to 32 bits. 1468 return static_cast<int>(stats->class_init_time_ns / 1000); 1469 case KIND_EXT_ALLOCATED_OBJECTS: 1470 case KIND_EXT_ALLOCATED_BYTES: 1471 case KIND_EXT_FREED_OBJECTS: 1472 case KIND_EXT_FREED_BYTES: 1473 return 0; // backward compatibility 1474 default: 1475 LOG(FATAL) << "Unknown statistic " << kind; 1476 return -1; // unreachable 1477 } 1478} 1479 1480void Runtime::BlockSignals() { 1481 SignalSet signals; 1482 signals.Add(SIGPIPE); 1483 // SIGQUIT is used to dump the runtime's state (including stack traces). 1484 signals.Add(SIGQUIT); 1485 // SIGUSR1 is used to initiate a GC. 1486 signals.Add(SIGUSR1); 1487 signals.Block(); 1488} 1489 1490bool Runtime::AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group, 1491 bool create_peer) { 1492 ScopedTrace trace(__FUNCTION__); 1493 return Thread::Attach(thread_name, as_daemon, thread_group, create_peer) != nullptr; 1494} 1495 1496void Runtime::DetachCurrentThread() { 1497 ScopedTrace trace(__FUNCTION__); 1498 Thread* self = Thread::Current(); 1499 if (self == nullptr) { 1500 LOG(FATAL) << "attempting to detach thread that is not attached"; 1501 } 1502 if (self->HasManagedStack()) { 1503 LOG(FATAL) << *Thread::Current() << " attempting to detach while still running code"; 1504 } 1505 thread_list_->Unregister(self); 1506} 1507 1508mirror::Throwable* Runtime::GetPreAllocatedOutOfMemoryError() { 1509 mirror::Throwable* oome = pre_allocated_OutOfMemoryError_.Read(); 1510 if (oome == nullptr) { 1511 LOG(ERROR) << "Failed to return pre-allocated OOME"; 1512 } 1513 return oome; 1514} 1515 1516mirror::Throwable* Runtime::GetPreAllocatedNoClassDefFoundError() { 1517 mirror::Throwable* ncdfe = pre_allocated_NoClassDefFoundError_.Read(); 1518 if (ncdfe == nullptr) { 1519 LOG(ERROR) << "Failed to return pre-allocated NoClassDefFoundError"; 1520 } 1521 return ncdfe; 1522} 1523 1524void Runtime::VisitConstantRoots(RootVisitor* visitor) { 1525 // Visit the classes held as static in mirror classes, these can be visited concurrently and only 1526 // need to be visited once per GC since they never change. 1527 mirror::Class::VisitRoots(visitor); 1528 mirror::Constructor::VisitRoots(visitor); 1529 mirror::Reference::VisitRoots(visitor); 1530 mirror::Method::VisitRoots(visitor); 1531 mirror::StackTraceElement::VisitRoots(visitor); 1532 mirror::String::VisitRoots(visitor); 1533 mirror::Throwable::VisitRoots(visitor); 1534 mirror::Field::VisitRoots(visitor); 1535 // Visit all the primitive array types classes. 1536 mirror::PrimitiveArray<uint8_t>::VisitRoots(visitor); // BooleanArray 1537 mirror::PrimitiveArray<int8_t>::VisitRoots(visitor); // ByteArray 1538 mirror::PrimitiveArray<uint16_t>::VisitRoots(visitor); // CharArray 1539 mirror::PrimitiveArray<double>::VisitRoots(visitor); // DoubleArray 1540 mirror::PrimitiveArray<float>::VisitRoots(visitor); // FloatArray 1541 mirror::PrimitiveArray<int32_t>::VisitRoots(visitor); // IntArray 1542 mirror::PrimitiveArray<int64_t>::VisitRoots(visitor); // LongArray 1543 mirror::PrimitiveArray<int16_t>::VisitRoots(visitor); // ShortArray 1544 // Visiting the roots of these ArtMethods is not currently required since all the GcRoots are 1545 // null. 1546 BufferedRootVisitor<16> buffered_visitor(visitor, RootInfo(kRootVMInternal)); 1547 const size_t pointer_size = GetClassLinker()->GetImagePointerSize(); 1548 if (HasResolutionMethod()) { 1549 resolution_method_->VisitRoots(buffered_visitor, pointer_size); 1550 } 1551 if (HasImtConflictMethod()) { 1552 imt_conflict_method_->VisitRoots(buffered_visitor, pointer_size); 1553 } 1554 if (imt_unimplemented_method_ != nullptr) { 1555 imt_unimplemented_method_->VisitRoots(buffered_visitor, pointer_size); 1556 } 1557 for (size_t i = 0; i < kLastCalleeSaveType; ++i) { 1558 auto* m = reinterpret_cast<ArtMethod*>(callee_save_methods_[i]); 1559 if (m != nullptr) { 1560 m->VisitRoots(buffered_visitor, pointer_size); 1561 } 1562 } 1563} 1564 1565void Runtime::VisitConcurrentRoots(RootVisitor* visitor, VisitRootFlags flags) { 1566 intern_table_->VisitRoots(visitor, flags); 1567 class_linker_->VisitRoots(visitor, flags); 1568 heap_->VisitAllocationRecords(visitor); 1569 if ((flags & kVisitRootFlagNewRoots) == 0) { 1570 // Guaranteed to have no new roots in the constant roots. 1571 VisitConstantRoots(visitor); 1572 } 1573 Dbg::VisitRoots(visitor); 1574} 1575 1576void Runtime::VisitTransactionRoots(RootVisitor* visitor) { 1577 if (preinitialization_transaction_ != nullptr) { 1578 preinitialization_transaction_->VisitRoots(visitor); 1579 } 1580} 1581 1582void Runtime::VisitNonThreadRoots(RootVisitor* visitor) { 1583 java_vm_->VisitRoots(visitor); 1584 sentinel_.VisitRootIfNonNull(visitor, RootInfo(kRootVMInternal)); 1585 pre_allocated_OutOfMemoryError_.VisitRootIfNonNull(visitor, RootInfo(kRootVMInternal)); 1586 pre_allocated_NoClassDefFoundError_.VisitRootIfNonNull(visitor, RootInfo(kRootVMInternal)); 1587 verifier::MethodVerifier::VisitStaticRoots(visitor); 1588 VisitTransactionRoots(visitor); 1589} 1590 1591void Runtime::VisitNonConcurrentRoots(RootVisitor* visitor) { 1592 thread_list_->VisitRoots(visitor); 1593 VisitNonThreadRoots(visitor); 1594} 1595 1596void Runtime::VisitThreadRoots(RootVisitor* visitor) { 1597 thread_list_->VisitRoots(visitor); 1598} 1599 1600size_t Runtime::FlipThreadRoots(Closure* thread_flip_visitor, Closure* flip_callback, 1601 gc::collector::GarbageCollector* collector) { 1602 return thread_list_->FlipThreadRoots(thread_flip_visitor, flip_callback, collector); 1603} 1604 1605void Runtime::VisitRoots(RootVisitor* visitor, VisitRootFlags flags) { 1606 VisitNonConcurrentRoots(visitor); 1607 VisitConcurrentRoots(visitor, flags); 1608} 1609 1610void Runtime::VisitImageRoots(RootVisitor* visitor) { 1611 for (auto* space : GetHeap()->GetContinuousSpaces()) { 1612 if (space->IsImageSpace()) { 1613 auto* image_space = space->AsImageSpace(); 1614 const auto& image_header = image_space->GetImageHeader(); 1615 for (size_t i = 0; i < ImageHeader::kImageRootsMax; ++i) { 1616 auto* obj = image_header.GetImageRoot(static_cast<ImageHeader::ImageRoot>(i)); 1617 if (obj != nullptr) { 1618 auto* after_obj = obj; 1619 visitor->VisitRoot(&after_obj, RootInfo(kRootStickyClass)); 1620 CHECK_EQ(after_obj, obj); 1621 } 1622 } 1623 } 1624 } 1625} 1626 1627static ImtConflictTable::Entry empty_entry = { nullptr, nullptr }; 1628 1629ArtMethod* Runtime::CreateImtConflictMethod(LinearAlloc* linear_alloc) { 1630 auto* method = Runtime::Current()->GetClassLinker()->CreateRuntimeMethod(linear_alloc); 1631 // When compiling, the code pointer will get set later when the image is loaded. 1632 if (IsAotCompiler()) { 1633 size_t pointer_size = GetInstructionSetPointerSize(instruction_set_); 1634 method->SetEntryPointFromQuickCompiledCodePtrSize(nullptr, pointer_size); 1635 } else { 1636 method->SetEntryPointFromQuickCompiledCode(GetQuickImtConflictStub()); 1637 method->SetImtConflictTable(reinterpret_cast<ImtConflictTable*>(&empty_entry)); 1638 } 1639 return method; 1640} 1641 1642void Runtime::SetImtConflictMethod(ArtMethod* method) { 1643 CHECK(method != nullptr); 1644 CHECK(method->IsRuntimeMethod()); 1645 imt_conflict_method_ = method; 1646 if (!IsAotCompiler()) { 1647 method->SetImtConflictTable(reinterpret_cast<ImtConflictTable*>(&empty_entry)); 1648 } 1649} 1650 1651ArtMethod* Runtime::CreateResolutionMethod() { 1652 auto* method = GetClassLinker()->CreateRuntimeMethod(GetLinearAlloc()); 1653 // When compiling, the code pointer will get set later when the image is loaded. 1654 if (IsAotCompiler()) { 1655 size_t pointer_size = GetInstructionSetPointerSize(instruction_set_); 1656 method->SetEntryPointFromQuickCompiledCodePtrSize(nullptr, pointer_size); 1657 } else { 1658 method->SetEntryPointFromQuickCompiledCode(GetQuickResolutionStub()); 1659 } 1660 return method; 1661} 1662 1663ArtMethod* Runtime::CreateCalleeSaveMethod() { 1664 auto* method = GetClassLinker()->CreateRuntimeMethod(GetLinearAlloc()); 1665 size_t pointer_size = GetInstructionSetPointerSize(instruction_set_); 1666 method->SetEntryPointFromQuickCompiledCodePtrSize(nullptr, pointer_size); 1667 DCHECK_NE(instruction_set_, kNone); 1668 DCHECK(method->IsRuntimeMethod()); 1669 return method; 1670} 1671 1672void Runtime::DisallowNewSystemWeaks() { 1673 CHECK(!kUseReadBarrier); 1674 monitor_list_->DisallowNewMonitors(); 1675 intern_table_->ChangeWeakRootState(gc::kWeakRootStateNoReadsOrWrites); 1676 java_vm_->DisallowNewWeakGlobals(); 1677 heap_->DisallowNewAllocationRecords(); 1678 lambda_box_table_->DisallowNewWeakBoxedLambdas(); 1679} 1680 1681void Runtime::AllowNewSystemWeaks() { 1682 CHECK(!kUseReadBarrier); 1683 monitor_list_->AllowNewMonitors(); 1684 intern_table_->ChangeWeakRootState(gc::kWeakRootStateNormal); // TODO: Do this in the sweeping. 1685 java_vm_->AllowNewWeakGlobals(); 1686 heap_->AllowNewAllocationRecords(); 1687 lambda_box_table_->AllowNewWeakBoxedLambdas(); 1688} 1689 1690void Runtime::BroadcastForNewSystemWeaks() { 1691 // This is used for the read barrier case that uses the thread-local 1692 // Thread::GetWeakRefAccessEnabled() flag. 1693 CHECK(kUseReadBarrier); 1694 monitor_list_->BroadcastForNewMonitors(); 1695 intern_table_->BroadcastForNewInterns(); 1696 java_vm_->BroadcastForNewWeakGlobals(); 1697 heap_->BroadcastForNewAllocationRecords(); 1698 lambda_box_table_->BroadcastForNewWeakBoxedLambdas(); 1699} 1700 1701void Runtime::SetInstructionSet(InstructionSet instruction_set) { 1702 instruction_set_ = instruction_set; 1703 if ((instruction_set_ == kThumb2) || (instruction_set_ == kArm)) { 1704 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1705 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1706 callee_save_method_frame_infos_[i] = arm::ArmCalleeSaveMethodFrameInfo(type); 1707 } 1708 } else if (instruction_set_ == kMips) { 1709 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1710 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1711 callee_save_method_frame_infos_[i] = mips::MipsCalleeSaveMethodFrameInfo(type); 1712 } 1713 } else if (instruction_set_ == kMips64) { 1714 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1715 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1716 callee_save_method_frame_infos_[i] = mips64::Mips64CalleeSaveMethodFrameInfo(type); 1717 } 1718 } else if (instruction_set_ == kX86) { 1719 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1720 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1721 callee_save_method_frame_infos_[i] = x86::X86CalleeSaveMethodFrameInfo(type); 1722 } 1723 } else if (instruction_set_ == kX86_64) { 1724 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1725 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1726 callee_save_method_frame_infos_[i] = x86_64::X86_64CalleeSaveMethodFrameInfo(type); 1727 } 1728 } else if (instruction_set_ == kArm64) { 1729 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1730 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1731 callee_save_method_frame_infos_[i] = arm64::Arm64CalleeSaveMethodFrameInfo(type); 1732 } 1733 } else { 1734 UNIMPLEMENTED(FATAL) << instruction_set_; 1735 } 1736} 1737 1738void Runtime::SetCalleeSaveMethod(ArtMethod* method, CalleeSaveType type) { 1739 DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastCalleeSaveType)); 1740 CHECK(method != nullptr); 1741 callee_save_methods_[type] = reinterpret_cast<uintptr_t>(method); 1742} 1743 1744void Runtime::RegisterAppInfo(const std::vector<std::string>& code_paths, 1745 const std::string& profile_output_filename, 1746 const std::string& foreign_dex_profile_path, 1747 const std::string& app_dir) { 1748 if (jit_.get() == nullptr) { 1749 // We are not JITing. Nothing to do. 1750 return; 1751 } 1752 1753 VLOG(profiler) << "Register app with " << profile_output_filename 1754 << " " << Join(code_paths, ':'); 1755 1756 if (profile_output_filename.empty()) { 1757 LOG(WARNING) << "JIT profile information will not be recorded: profile filename is empty."; 1758 return; 1759 } 1760 if (!FileExists(profile_output_filename)) { 1761 LOG(WARNING) << "JIT profile information will not be recorded: profile file does not exits."; 1762 return; 1763 } 1764 if (code_paths.empty()) { 1765 LOG(WARNING) << "JIT profile information will not be recorded: code paths is empty."; 1766 return; 1767 } 1768 1769 profile_output_filename_ = profile_output_filename; 1770 jit_->StartProfileSaver(profile_output_filename, 1771 code_paths, 1772 foreign_dex_profile_path, 1773 app_dir); 1774} 1775 1776void Runtime::NotifyDexLoaded(const std::string& dex_location) { 1777 VLOG(profiler) << "Notify dex loaded: " << dex_location; 1778 // We know that if the ProfileSaver is started then we can record profile information. 1779 if (ProfileSaver::IsStarted()) { 1780 ProfileSaver::NotifyDexUse(dex_location); 1781 } 1782} 1783 1784// Transaction support. 1785void Runtime::EnterTransactionMode(Transaction* transaction) { 1786 DCHECK(IsAotCompiler()); 1787 DCHECK(transaction != nullptr); 1788 DCHECK(!IsActiveTransaction()); 1789 preinitialization_transaction_ = transaction; 1790} 1791 1792void Runtime::ExitTransactionMode() { 1793 DCHECK(IsAotCompiler()); 1794 DCHECK(IsActiveTransaction()); 1795 preinitialization_transaction_ = nullptr; 1796} 1797 1798bool Runtime::IsTransactionAborted() const { 1799 if (!IsActiveTransaction()) { 1800 return false; 1801 } else { 1802 DCHECK(IsAotCompiler()); 1803 return preinitialization_transaction_->IsAborted(); 1804 } 1805} 1806 1807void Runtime::AbortTransactionAndThrowAbortError(Thread* self, const std::string& abort_message) { 1808 DCHECK(IsAotCompiler()); 1809 DCHECK(IsActiveTransaction()); 1810 // Throwing an exception may cause its class initialization. If we mark the transaction 1811 // aborted before that, we may warn with a false alarm. Throwing the exception before 1812 // marking the transaction aborted avoids that. 1813 preinitialization_transaction_->ThrowAbortError(self, &abort_message); 1814 preinitialization_transaction_->Abort(abort_message); 1815} 1816 1817void Runtime::ThrowTransactionAbortError(Thread* self) { 1818 DCHECK(IsAotCompiler()); 1819 DCHECK(IsActiveTransaction()); 1820 // Passing nullptr means we rethrow an exception with the earlier transaction abort message. 1821 preinitialization_transaction_->ThrowAbortError(self, nullptr); 1822} 1823 1824void Runtime::RecordWriteFieldBoolean(mirror::Object* obj, MemberOffset field_offset, 1825 uint8_t value, bool is_volatile) const { 1826 DCHECK(IsAotCompiler()); 1827 DCHECK(IsActiveTransaction()); 1828 preinitialization_transaction_->RecordWriteFieldBoolean(obj, field_offset, value, is_volatile); 1829} 1830 1831void Runtime::RecordWriteFieldByte(mirror::Object* obj, MemberOffset field_offset, 1832 int8_t value, bool is_volatile) const { 1833 DCHECK(IsAotCompiler()); 1834 DCHECK(IsActiveTransaction()); 1835 preinitialization_transaction_->RecordWriteFieldByte(obj, field_offset, value, is_volatile); 1836} 1837 1838void Runtime::RecordWriteFieldChar(mirror::Object* obj, MemberOffset field_offset, 1839 uint16_t value, bool is_volatile) const { 1840 DCHECK(IsAotCompiler()); 1841 DCHECK(IsActiveTransaction()); 1842 preinitialization_transaction_->RecordWriteFieldChar(obj, field_offset, value, is_volatile); 1843} 1844 1845void Runtime::RecordWriteFieldShort(mirror::Object* obj, MemberOffset field_offset, 1846 int16_t value, bool is_volatile) const { 1847 DCHECK(IsAotCompiler()); 1848 DCHECK(IsActiveTransaction()); 1849 preinitialization_transaction_->RecordWriteFieldShort(obj, field_offset, value, is_volatile); 1850} 1851 1852void Runtime::RecordWriteField32(mirror::Object* obj, MemberOffset field_offset, 1853 uint32_t value, bool is_volatile) const { 1854 DCHECK(IsAotCompiler()); 1855 DCHECK(IsActiveTransaction()); 1856 preinitialization_transaction_->RecordWriteField32(obj, field_offset, value, is_volatile); 1857} 1858 1859void Runtime::RecordWriteField64(mirror::Object* obj, MemberOffset field_offset, 1860 uint64_t value, bool is_volatile) const { 1861 DCHECK(IsAotCompiler()); 1862 DCHECK(IsActiveTransaction()); 1863 preinitialization_transaction_->RecordWriteField64(obj, field_offset, value, is_volatile); 1864} 1865 1866void Runtime::RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset, 1867 mirror::Object* value, bool is_volatile) const { 1868 DCHECK(IsAotCompiler()); 1869 DCHECK(IsActiveTransaction()); 1870 preinitialization_transaction_->RecordWriteFieldReference(obj, field_offset, value, is_volatile); 1871} 1872 1873void Runtime::RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const { 1874 DCHECK(IsAotCompiler()); 1875 DCHECK(IsActiveTransaction()); 1876 preinitialization_transaction_->RecordWriteArray(array, index, value); 1877} 1878 1879void Runtime::RecordStrongStringInsertion(mirror::String* s) const { 1880 DCHECK(IsAotCompiler()); 1881 DCHECK(IsActiveTransaction()); 1882 preinitialization_transaction_->RecordStrongStringInsertion(s); 1883} 1884 1885void Runtime::RecordWeakStringInsertion(mirror::String* s) const { 1886 DCHECK(IsAotCompiler()); 1887 DCHECK(IsActiveTransaction()); 1888 preinitialization_transaction_->RecordWeakStringInsertion(s); 1889} 1890 1891void Runtime::RecordStrongStringRemoval(mirror::String* s) const { 1892 DCHECK(IsAotCompiler()); 1893 DCHECK(IsActiveTransaction()); 1894 preinitialization_transaction_->RecordStrongStringRemoval(s); 1895} 1896 1897void Runtime::RecordWeakStringRemoval(mirror::String* s) const { 1898 DCHECK(IsAotCompiler()); 1899 DCHECK(IsActiveTransaction()); 1900 preinitialization_transaction_->RecordWeakStringRemoval(s); 1901} 1902 1903void Runtime::SetFaultMessage(const std::string& message) { 1904 MutexLock mu(Thread::Current(), fault_message_lock_); 1905 fault_message_ = message; 1906} 1907 1908void Runtime::AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* argv) 1909 const { 1910 if (GetInstrumentation()->InterpretOnly()) { 1911 argv->push_back("--compiler-filter=interpret-only"); 1912 } 1913 1914 // Make the dex2oat instruction set match that of the launching runtime. If we have multiple 1915 // architecture support, dex2oat may be compiled as a different instruction-set than that 1916 // currently being executed. 1917 std::string instruction_set("--instruction-set="); 1918 instruction_set += GetInstructionSetString(kRuntimeISA); 1919 argv->push_back(instruction_set); 1920 1921 std::unique_ptr<const InstructionSetFeatures> features(InstructionSetFeatures::FromCppDefines()); 1922 std::string feature_string("--instruction-set-features="); 1923 feature_string += features->GetFeatureString(); 1924 argv->push_back(feature_string); 1925} 1926 1927void Runtime::CreateJit() { 1928 CHECK(!IsAotCompiler()); 1929 if (GetInstrumentation()->IsForcedInterpretOnly()) { 1930 // Don't create JIT if forced interpret only. 1931 return; 1932 } 1933 std::string error_msg; 1934 jit_.reset(jit::Jit::Create(jit_options_.get(), &error_msg)); 1935 if (jit_.get() == nullptr) { 1936 LOG(WARNING) << "Failed to create JIT " << error_msg; 1937 } 1938} 1939 1940bool Runtime::CanRelocate() const { 1941 return !IsAotCompiler() || compiler_callbacks_->IsRelocationPossible(); 1942} 1943 1944bool Runtime::IsCompilingBootImage() const { 1945 return IsCompiler() && compiler_callbacks_->IsBootImage(); 1946} 1947 1948void Runtime::SetResolutionMethod(ArtMethod* method) { 1949 CHECK(method != nullptr); 1950 CHECK(method->IsRuntimeMethod()) << method; 1951 resolution_method_ = method; 1952} 1953 1954void Runtime::SetImtUnimplementedMethod(ArtMethod* method) { 1955 CHECK(method != nullptr); 1956 CHECK(method->IsRuntimeMethod()); 1957 imt_unimplemented_method_ = method; 1958 if (!IsAotCompiler()) { 1959 method->SetImtConflictTable(reinterpret_cast<ImtConflictTable*>(&empty_entry)); 1960 } 1961} 1962 1963bool Runtime::IsVerificationEnabled() const { 1964 return verify_ == verifier::VerifyMode::kEnable || 1965 verify_ == verifier::VerifyMode::kSoftFail; 1966} 1967 1968bool Runtime::IsVerificationSoftFail() const { 1969 return verify_ == verifier::VerifyMode::kSoftFail; 1970} 1971 1972LinearAlloc* Runtime::CreateLinearAlloc() { 1973 // For 64 bit compilers, it needs to be in low 4GB in the case where we are cross compiling for a 1974 // 32 bit target. In this case, we have 32 bit pointers in the dex cache arrays which can't hold 1975 // when we have 64 bit ArtMethod pointers. 1976 return (IsAotCompiler() && Is64BitInstructionSet(kRuntimeISA)) 1977 ? new LinearAlloc(low_4gb_arena_pool_.get()) 1978 : new LinearAlloc(arena_pool_.get()); 1979} 1980 1981double Runtime::GetHashTableMinLoadFactor() const { 1982 return is_low_memory_mode_ ? kLowMemoryMinLoadFactor : kNormalMinLoadFactor; 1983} 1984 1985double Runtime::GetHashTableMaxLoadFactor() const { 1986 return is_low_memory_mode_ ? kLowMemoryMaxLoadFactor : kNormalMaxLoadFactor; 1987} 1988 1989void Runtime::UpdateProcessState(ProcessState process_state) { 1990 ProcessState old_process_state = process_state_; 1991 process_state_ = process_state; 1992 GetHeap()->UpdateProcessState(old_process_state, process_state); 1993} 1994 1995void Runtime::RegisterSensitiveThread() const { 1996 Thread::SetJitSensitiveThread(); 1997} 1998 1999// Returns true if JIT compilations are enabled. GetJit() will be not null in this case. 2000bool Runtime::UseJitCompilation() const { 2001 return (jit_ != nullptr) && jit_->UseJitCompilation(); 2002} 2003 2004// Returns true if profile saving is enabled. GetJit() will be not null in this case. 2005bool Runtime::SaveProfileInfo() const { 2006 return (jit_ != nullptr) && jit_->SaveProfilingInfo(); 2007} 2008 2009} // namespace art 2010