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