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 #if defined(__APPLE__) 30 #include <crt_externs.h> // for _NSGetEnviron 31 #endif 32 33 #include <cstdio> 34 #include <cstdlib> 35 #include <limits> 36 #include <memory_representation.h> 37 #include <vector> 38 #include <fcntl.h> 39 40 #include "android-base/strings.h" 41 42 #include "JniConstants.h" 43 #include "ScopedLocalRef.h" 44 #include "arch/arm/quick_method_frame_info_arm.h" 45 #include "arch/arm/registers_arm.h" 46 #include "arch/arm64/quick_method_frame_info_arm64.h" 47 #include "arch/arm64/registers_arm64.h" 48 #include "arch/instruction_set_features.h" 49 #include "arch/mips/quick_method_frame_info_mips.h" 50 #include "arch/mips/registers_mips.h" 51 #include "arch/mips64/quick_method_frame_info_mips64.h" 52 #include "arch/mips64/registers_mips64.h" 53 #include "arch/x86/quick_method_frame_info_x86.h" 54 #include "arch/x86/registers_x86.h" 55 #include "arch/x86_64/quick_method_frame_info_x86_64.h" 56 #include "arch/x86_64/registers_x86_64.h" 57 #include "art_field-inl.h" 58 #include "art_method-inl.h" 59 #include "asm_support.h" 60 #include "atomic.h" 61 #include "base/arena_allocator.h" 62 #include "base/dumpable.h" 63 #include "base/enums.h" 64 #include "base/stl_util.h" 65 #include "base/systrace.h" 66 #include "base/unix_file/fd_file.h" 67 #include "cha.h" 68 #include "class_linker-inl.h" 69 #include "compiler_callbacks.h" 70 #include "debugger.h" 71 #include "elf_file.h" 72 #include "entrypoints/runtime_asm_entrypoints.h" 73 #include "experimental_flags.h" 74 #include "fault_handler.h" 75 #include "gc/accounting/card_table-inl.h" 76 #include "gc/heap.h" 77 #include "gc/scoped_gc_critical_section.h" 78 #include "gc/space/image_space.h" 79 #include "gc/space/space-inl.h" 80 #include "gc/system_weak.h" 81 #include "handle_scope-inl.h" 82 #include "image-inl.h" 83 #include "instrumentation.h" 84 #include "intern_table.h" 85 #include "interpreter/interpreter.h" 86 #include "java_vm_ext.h" 87 #include "jit/jit.h" 88 #include "jit/jit_code_cache.h" 89 #include "jni_internal.h" 90 #include "linear_alloc.h" 91 #include "mirror/array.h" 92 #include "mirror/class-inl.h" 93 #include "mirror/class_ext.h" 94 #include "mirror/class_loader.h" 95 #include "mirror/emulated_stack_frame.h" 96 #include "mirror/field.h" 97 #include "mirror/method.h" 98 #include "mirror/method_handle_impl.h" 99 #include "mirror/method_handles_lookup.h" 100 #include "mirror/method_type.h" 101 #include "mirror/stack_trace_element.h" 102 #include "mirror/throwable.h" 103 #include "monitor.h" 104 #include "native/dalvik_system_DexFile.h" 105 #include "native/dalvik_system_VMDebug.h" 106 #include "native/dalvik_system_VMRuntime.h" 107 #include "native/dalvik_system_VMStack.h" 108 #include "native/dalvik_system_ZygoteHooks.h" 109 #include "native/java_lang_Class.h" 110 #include "native/java_lang_Object.h" 111 #include "native/java_lang_String.h" 112 #include "native/java_lang_StringFactory.h" 113 #include "native/java_lang_System.h" 114 #include "native/java_lang_Thread.h" 115 #include "native/java_lang_Throwable.h" 116 #include "native/java_lang_VMClassLoader.h" 117 #include "native/java_lang_Void.h" 118 #include "native/java_lang_invoke_MethodHandleImpl.h" 119 #include "native/java_lang_ref_FinalizerReference.h" 120 #include "native/java_lang_ref_Reference.h" 121 #include "native/java_lang_reflect_Array.h" 122 #include "native/java_lang_reflect_Constructor.h" 123 #include "native/java_lang_reflect_Executable.h" 124 #include "native/java_lang_reflect_Field.h" 125 #include "native/java_lang_reflect_Method.h" 126 #include "native/java_lang_reflect_Parameter.h" 127 #include "native/java_lang_reflect_Proxy.h" 128 #include "native/java_util_concurrent_atomic_AtomicLong.h" 129 #include "native/libcore_util_CharsetUtils.h" 130 #include "native/org_apache_harmony_dalvik_ddmc_DdmServer.h" 131 #include "native/org_apache_harmony_dalvik_ddmc_DdmVmInternal.h" 132 #include "native/sun_misc_Unsafe.h" 133 #include "native_bridge_art_interface.h" 134 #include "native_stack_dump.h" 135 #include "oat_file.h" 136 #include "oat_file_manager.h" 137 #include "os.h" 138 #include "parsed_options.h" 139 #include "jit/profile_saver.h" 140 #include "quick/quick_method_frame_info.h" 141 #include "reflection.h" 142 #include "runtime_callbacks.h" 143 #include "runtime_options.h" 144 #include "ScopedLocalRef.h" 145 #include "scoped_thread_state_change-inl.h" 146 #include "sigchain.h" 147 #include "signal_catcher.h" 148 #include "signal_set.h" 149 #include "thread.h" 150 #include "thread_list.h" 151 #include "ti/agent.h" 152 #include "trace.h" 153 #include "transaction.h" 154 #include "utils.h" 155 #include "vdex_file.h" 156 #include "verifier/method_verifier.h" 157 #include "well_known_classes.h" 158 159 #ifdef ART_TARGET_ANDROID 160 #include <android/set_abort_message.h> 161 #endif 162 163 namespace art { 164 165 // If a signal isn't handled properly, enable a handler that attempts to dump the Java stack. 166 static constexpr bool kEnableJavaStackTraceHandler = false; 167 // Tuned by compiling GmsCore under perf and measuring time spent in DescriptorEquals for class 168 // linking. 169 static constexpr double kLowMemoryMinLoadFactor = 0.5; 170 static constexpr double kLowMemoryMaxLoadFactor = 0.8; 171 static constexpr double kNormalMinLoadFactor = 0.4; 172 static constexpr double kNormalMaxLoadFactor = 0.7; 173 Runtime* Runtime::instance_ = nullptr; 174 175 struct TraceConfig { 176 Trace::TraceMode trace_mode; 177 Trace::TraceOutputMode trace_output_mode; 178 std::string trace_file; 179 size_t trace_file_size; 180 }; 181 182 namespace { 183 #ifdef __APPLE__ 184 inline char** GetEnviron() { 185 // When Google Test is built as a framework on MacOS X, the environ variable 186 // is unavailable. Apple's documentation (man environ) recommends using 187 // _NSGetEnviron() instead. 188 return *_NSGetEnviron(); 189 } 190 #else 191 // Some POSIX platforms expect you to declare environ. extern "C" makes 192 // it reside in the global namespace. 193 extern "C" char** environ; 194 inline char** GetEnviron() { return environ; } 195 #endif 196 } // namespace 197 198 Runtime::Runtime() 199 : resolution_method_(nullptr), 200 imt_conflict_method_(nullptr), 201 imt_unimplemented_method_(nullptr), 202 instruction_set_(kNone), 203 compiler_callbacks_(nullptr), 204 is_zygote_(false), 205 must_relocate_(false), 206 is_concurrent_gc_enabled_(true), 207 is_explicit_gc_disabled_(false), 208 dex2oat_enabled_(true), 209 image_dex2oat_enabled_(true), 210 default_stack_size_(0), 211 heap_(nullptr), 212 max_spins_before_thin_lock_inflation_(Monitor::kDefaultMaxSpinsBeforeThinLockInflation), 213 monitor_list_(nullptr), 214 monitor_pool_(nullptr), 215 thread_list_(nullptr), 216 intern_table_(nullptr), 217 class_linker_(nullptr), 218 signal_catcher_(nullptr), 219 java_vm_(nullptr), 220 fault_message_lock_("Fault message lock"), 221 fault_message_(""), 222 threads_being_born_(0), 223 shutdown_cond_(new ConditionVariable("Runtime shutdown", *Locks::runtime_shutdown_lock_)), 224 shutting_down_(false), 225 shutting_down_started_(false), 226 started_(false), 227 finished_starting_(false), 228 vfprintf_(nullptr), 229 exit_(nullptr), 230 abort_(nullptr), 231 stats_enabled_(false), 232 is_running_on_memory_tool_(RUNNING_ON_MEMORY_TOOL), 233 instrumentation_(), 234 main_thread_group_(nullptr), 235 system_thread_group_(nullptr), 236 system_class_loader_(nullptr), 237 dump_gc_performance_on_shutdown_(false), 238 preinitialization_transaction_(nullptr), 239 verify_(verifier::VerifyMode::kNone), 240 allow_dex_file_fallback_(true), 241 target_sdk_version_(0), 242 implicit_null_checks_(false), 243 implicit_so_checks_(false), 244 implicit_suspend_checks_(false), 245 no_sig_chain_(false), 246 force_native_bridge_(false), 247 is_native_bridge_loaded_(false), 248 is_native_debuggable_(false), 249 is_java_debuggable_(false), 250 zygote_max_failed_boots_(0), 251 experimental_flags_(ExperimentalFlags::kNone), 252 oat_file_manager_(nullptr), 253 is_low_memory_mode_(false), 254 safe_mode_(false), 255 dump_native_stack_on_sig_quit_(true), 256 pruned_dalvik_cache_(false), 257 // Initially assume we perceive jank in case the process state is never updated. 258 process_state_(kProcessStateJankPerceptible), 259 zygote_no_threads_(false), 260 cha_(nullptr) { 261 CheckAsmSupportOffsetsAndSizes(); 262 std::fill(callee_save_methods_, callee_save_methods_ + arraysize(callee_save_methods_), 0u); 263 interpreter::CheckInterpreterAsmConstants(); 264 callbacks_.reset(new RuntimeCallbacks()); 265 for (size_t i = 0; i <= static_cast<size_t>(DeoptimizationKind::kLast); ++i) { 266 deoptimization_counts_[i] = 0u; 267 } 268 } 269 270 Runtime::~Runtime() { 271 ScopedTrace trace("Runtime shutdown"); 272 if (is_native_bridge_loaded_) { 273 UnloadNativeBridge(); 274 } 275 276 Thread* self = Thread::Current(); 277 const bool attach_shutdown_thread = self == nullptr; 278 if (attach_shutdown_thread) { 279 CHECK(AttachCurrentThread("Shutdown thread", false, nullptr, false)); 280 self = Thread::Current(); 281 } else { 282 LOG(WARNING) << "Current thread not detached in Runtime shutdown"; 283 } 284 285 if (dump_gc_performance_on_shutdown_) { 286 // This can't be called from the Heap destructor below because it 287 // could call RosAlloc::InspectAll() which needs the thread_list 288 // to be still alive. 289 heap_->DumpGcPerformanceInfo(LOG_STREAM(INFO)); 290 } 291 292 if (jit_ != nullptr) { 293 // Stop the profile saver thread before marking the runtime as shutting down. 294 // The saver will try to dump the profiles before being sopped and that 295 // requires holding the mutator lock. 296 jit_->StopProfileSaver(); 297 } 298 299 { 300 ScopedTrace trace2("Wait for shutdown cond"); 301 MutexLock mu(self, *Locks::runtime_shutdown_lock_); 302 shutting_down_started_ = true; 303 while (threads_being_born_ > 0) { 304 shutdown_cond_->Wait(self); 305 } 306 shutting_down_ = true; 307 } 308 // Shutdown and wait for the daemons. 309 CHECK(self != nullptr); 310 if (IsFinishedStarting()) { 311 ScopedTrace trace2("Waiting for Daemons"); 312 self->ClearException(); 313 self->GetJniEnv()->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons, 314 WellKnownClasses::java_lang_Daemons_stop); 315 } 316 317 Trace::Shutdown(); 318 319 // Report death. Clients me require a working thread, still, so do it before GC completes and 320 // all non-daemon threads are done. 321 { 322 ScopedObjectAccess soa(self); 323 callbacks_->NextRuntimePhase(RuntimePhaseCallback::RuntimePhase::kDeath); 324 } 325 326 if (attach_shutdown_thread) { 327 DetachCurrentThread(); 328 self = nullptr; 329 } 330 331 // Make sure to let the GC complete if it is running. 332 heap_->WaitForGcToComplete(gc::kGcCauseBackground, self); 333 heap_->DeleteThreadPool(); 334 if (jit_ != nullptr) { 335 ScopedTrace trace2("Delete jit"); 336 VLOG(jit) << "Deleting jit thread pool"; 337 // Delete thread pool before the thread list since we don't want to wait forever on the 338 // JIT compiler threads. 339 jit_->DeleteThreadPool(); 340 } 341 342 // TODO Maybe do some locking. 343 for (auto& agent : agents_) { 344 agent.Unload(); 345 } 346 347 // TODO Maybe do some locking 348 for (auto& plugin : plugins_) { 349 plugin.Unload(); 350 } 351 352 // Make sure our internal threads are dead before we start tearing down things they're using. 353 Dbg::StopJdwp(); 354 delete signal_catcher_; 355 356 // Make sure all other non-daemon threads have terminated, and all daemon threads are suspended. 357 { 358 ScopedTrace trace2("Delete thread list"); 359 delete thread_list_; 360 } 361 // Delete the JIT after thread list to ensure that there is no remaining threads which could be 362 // accessing the instrumentation when we delete it. 363 if (jit_ != nullptr) { 364 VLOG(jit) << "Deleting jit"; 365 jit_.reset(nullptr); 366 } 367 368 // Shutdown the fault manager if it was initialized. 369 fault_manager.Shutdown(); 370 371 ScopedTrace trace2("Delete state"); 372 delete monitor_list_; 373 delete monitor_pool_; 374 delete class_linker_; 375 delete cha_; 376 delete heap_; 377 delete intern_table_; 378 delete oat_file_manager_; 379 Thread::Shutdown(); 380 QuasiAtomic::Shutdown(); 381 verifier::MethodVerifier::Shutdown(); 382 383 // Destroy allocators before shutting down the MemMap because they may use it. 384 java_vm_.reset(); 385 linear_alloc_.reset(); 386 low_4gb_arena_pool_.reset(); 387 arena_pool_.reset(); 388 jit_arena_pool_.reset(); 389 MemMap::Shutdown(); 390 391 // TODO: acquire a static mutex on Runtime to avoid racing. 392 CHECK(instance_ == nullptr || instance_ == this); 393 instance_ = nullptr; 394 } 395 396 struct AbortState { 397 void Dump(std::ostream& os) const { 398 if (gAborting > 1) { 399 os << "Runtime aborting --- recursively, so no thread-specific detail!\n"; 400 DumpRecursiveAbort(os); 401 return; 402 } 403 gAborting++; 404 os << "Runtime aborting...\n"; 405 if (Runtime::Current() == nullptr) { 406 os << "(Runtime does not yet exist!)\n"; 407 DumpNativeStack(os, GetTid(), nullptr, " native: ", nullptr); 408 return; 409 } 410 Thread* self = Thread::Current(); 411 if (self == nullptr) { 412 os << "(Aborting thread was not attached to runtime!)\n"; 413 DumpKernelStack(os, GetTid(), " kernel: ", false); 414 DumpNativeStack(os, GetTid(), nullptr, " native: ", nullptr); 415 } else { 416 os << "Aborting thread:\n"; 417 if (Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)) { 418 DumpThread(os, self); 419 } else { 420 if (Locks::mutator_lock_->SharedTryLock(self)) { 421 DumpThread(os, self); 422 Locks::mutator_lock_->SharedUnlock(self); 423 } 424 } 425 } 426 DumpAllThreads(os, self); 427 } 428 429 // No thread-safety analysis as we do explicitly test for holding the mutator lock. 430 void DumpThread(std::ostream& os, Thread* self) const NO_THREAD_SAFETY_ANALYSIS { 431 DCHECK(Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)); 432 self->Dump(os); 433 if (self->IsExceptionPending()) { 434 mirror::Throwable* exception = self->GetException(); 435 os << "Pending exception " << exception->Dump(); 436 } 437 } 438 439 void DumpAllThreads(std::ostream& os, Thread* self) const { 440 Runtime* runtime = Runtime::Current(); 441 if (runtime != nullptr) { 442 ThreadList* thread_list = runtime->GetThreadList(); 443 if (thread_list != nullptr) { 444 bool tll_already_held = Locks::thread_list_lock_->IsExclusiveHeld(self); 445 bool ml_already_held = Locks::mutator_lock_->IsSharedHeld(self); 446 if (!tll_already_held || !ml_already_held) { 447 os << "Dumping all threads without appropriate locks held:" 448 << (!tll_already_held ? " thread list lock" : "") 449 << (!ml_already_held ? " mutator lock" : "") 450 << "\n"; 451 } 452 os << "All threads:\n"; 453 thread_list->Dump(os); 454 } 455 } 456 } 457 458 // For recursive aborts. 459 void DumpRecursiveAbort(std::ostream& os) const NO_THREAD_SAFETY_ANALYSIS { 460 // The only thing we'll attempt is dumping the native stack of the current thread. We will only 461 // try this if we haven't exceeded an arbitrary amount of recursions, to recover and actually 462 // die. 463 // Note: as we're using a global counter for the recursive abort detection, there is a potential 464 // race here and it is not OK to just print when the counter is "2" (one from 465 // Runtime::Abort(), one from previous Dump() call). Use a number that seems large enough. 466 static constexpr size_t kOnlyPrintWhenRecursionLessThan = 100u; 467 if (gAborting < kOnlyPrintWhenRecursionLessThan) { 468 gAborting++; 469 DumpNativeStack(os, GetTid()); 470 } 471 } 472 }; 473 474 void Runtime::Abort(const char* msg) { 475 gAborting++; // set before taking any locks 476 477 // Ensure that we don't have multiple threads trying to abort at once, 478 // which would result in significantly worse diagnostics. 479 MutexLock mu(Thread::Current(), *Locks::abort_lock_); 480 481 // Get any pending output out of the way. 482 fflush(nullptr); 483 484 // Many people have difficulty distinguish aborts from crashes, 485 // so be explicit. 486 // Note: use cerr on the host to print log lines immediately, so we get at least some output 487 // in case of recursive aborts. We lose annotation with the source file and line number 488 // here, which is a minor issue. The same is significantly more complicated on device, 489 // which is why we ignore the issue there. 490 AbortState state; 491 if (kIsTargetBuild) { 492 LOG(FATAL_WITHOUT_ABORT) << Dumpable<AbortState>(state); 493 } else { 494 std::cerr << Dumpable<AbortState>(state); 495 } 496 497 // Sometimes we dump long messages, and the Android abort message only retains the first line. 498 // In those cases, just log the message again, to avoid logcat limits. 499 if (msg != nullptr && strchr(msg, '\n') != nullptr) { 500 LOG(FATAL_WITHOUT_ABORT) << msg; 501 } 502 503 // Call the abort hook if we have one. 504 if (Runtime::Current() != nullptr && Runtime::Current()->abort_ != nullptr) { 505 LOG(FATAL_WITHOUT_ABORT) << "Calling abort hook..."; 506 Runtime::Current()->abort_(); 507 // notreached 508 LOG(FATAL_WITHOUT_ABORT) << "Unexpectedly returned from abort hook!"; 509 } 510 511 #if defined(__GLIBC__) 512 // TODO: we ought to be able to use pthread_kill(3) here (or abort(3), 513 // which POSIX defines in terms of raise(3), which POSIX defines in terms 514 // of pthread_kill(3)). On Linux, though, libcorkscrew can't unwind through 515 // libpthread, which means the stacks we dump would be useless. Calling 516 // tgkill(2) directly avoids that. 517 syscall(__NR_tgkill, getpid(), GetTid(), SIGABRT); 518 // TODO: LLVM installs it's own SIGABRT handler so exit to be safe... Can we disable that in LLVM? 519 // If not, we could use sigaction(3) before calling tgkill(2) and lose this call to exit(3). 520 exit(1); 521 #else 522 abort(); 523 #endif 524 // notreached 525 } 526 527 void Runtime::PreZygoteFork() { 528 heap_->PreZygoteFork(); 529 } 530 531 void Runtime::CallExitHook(jint status) { 532 if (exit_ != nullptr) { 533 ScopedThreadStateChange tsc(Thread::Current(), kNative); 534 exit_(status); 535 LOG(WARNING) << "Exit hook returned instead of exiting!"; 536 } 537 } 538 539 void Runtime::SweepSystemWeaks(IsMarkedVisitor* visitor) { 540 GetInternTable()->SweepInternTableWeaks(visitor); 541 GetMonitorList()->SweepMonitorList(visitor); 542 GetJavaVM()->SweepJniWeakGlobals(visitor); 543 GetHeap()->SweepAllocationRecords(visitor); 544 if (GetJit() != nullptr) { 545 // Visit JIT literal tables. Objects in these tables are classes and strings 546 // and only classes can be affected by class unloading. The strings always 547 // stay alive as they are strongly interned. 548 // TODO: Move this closer to CleanupClassLoaders, to avoid blocking weak accesses 549 // from mutators. See b/32167580. 550 GetJit()->GetCodeCache()->SweepRootTables(visitor); 551 } 552 553 // All other generic system-weak holders. 554 for (gc::AbstractSystemWeakHolder* holder : system_weak_holders_) { 555 holder->Sweep(visitor); 556 } 557 } 558 559 bool Runtime::ParseOptions(const RuntimeOptions& raw_options, 560 bool ignore_unrecognized, 561 RuntimeArgumentMap* runtime_options) { 562 InitLogging(/* argv */ nullptr, Aborter); // Calls Locks::Init() as a side effect. 563 bool parsed = ParsedOptions::Parse(raw_options, ignore_unrecognized, runtime_options); 564 if (!parsed) { 565 LOG(ERROR) << "Failed to parse options"; 566 return false; 567 } 568 return true; 569 } 570 571 // Callback to check whether it is safe to call Abort (e.g., to use a call to 572 // LOG(FATAL)). It is only safe to call Abort if the runtime has been created, 573 // properly initialized, and has not shut down. 574 static bool IsSafeToCallAbort() NO_THREAD_SAFETY_ANALYSIS { 575 Runtime* runtime = Runtime::Current(); 576 return runtime != nullptr && runtime->IsStarted() && !runtime->IsShuttingDownLocked(); 577 } 578 579 bool Runtime::Create(RuntimeArgumentMap&& runtime_options) { 580 // TODO: acquire a static mutex on Runtime to avoid racing. 581 if (Runtime::instance_ != nullptr) { 582 return false; 583 } 584 instance_ = new Runtime; 585 Locks::SetClientCallback(IsSafeToCallAbort); 586 if (!instance_->Init(std::move(runtime_options))) { 587 // TODO: Currently deleting the instance will abort the runtime on destruction. Now This will 588 // leak memory, instead. Fix the destructor. b/19100793. 589 // delete instance_; 590 instance_ = nullptr; 591 return false; 592 } 593 return true; 594 } 595 596 bool Runtime::Create(const RuntimeOptions& raw_options, bool ignore_unrecognized) { 597 RuntimeArgumentMap runtime_options; 598 return ParseOptions(raw_options, ignore_unrecognized, &runtime_options) && 599 Create(std::move(runtime_options)); 600 } 601 602 static jobject CreateSystemClassLoader(Runtime* runtime) { 603 if (runtime->IsAotCompiler() && !runtime->GetCompilerCallbacks()->IsBootImage()) { 604 return nullptr; 605 } 606 607 ScopedObjectAccess soa(Thread::Current()); 608 ClassLinker* cl = Runtime::Current()->GetClassLinker(); 609 auto pointer_size = cl->GetImagePointerSize(); 610 611 StackHandleScope<2> hs(soa.Self()); 612 Handle<mirror::Class> class_loader_class( 613 hs.NewHandle(soa.Decode<mirror::Class>(WellKnownClasses::java_lang_ClassLoader))); 614 CHECK(cl->EnsureInitialized(soa.Self(), class_loader_class, true, true)); 615 616 ArtMethod* getSystemClassLoader = class_loader_class->FindDirectMethod( 617 "getSystemClassLoader", "()Ljava/lang/ClassLoader;", pointer_size); 618 CHECK(getSystemClassLoader != nullptr); 619 620 JValue result = InvokeWithJValues(soa, 621 nullptr, 622 jni::EncodeArtMethod(getSystemClassLoader), 623 nullptr); 624 JNIEnv* env = soa.Self()->GetJniEnv(); 625 ScopedLocalRef<jobject> system_class_loader(env, soa.AddLocalReference<jobject>(result.GetL())); 626 CHECK(system_class_loader.get() != nullptr); 627 628 soa.Self()->SetClassLoaderOverride(system_class_loader.get()); 629 630 Handle<mirror::Class> thread_class( 631 hs.NewHandle(soa.Decode<mirror::Class>(WellKnownClasses::java_lang_Thread))); 632 CHECK(cl->EnsureInitialized(soa.Self(), thread_class, true, true)); 633 634 ArtField* contextClassLoader = 635 thread_class->FindDeclaredInstanceField("contextClassLoader", "Ljava/lang/ClassLoader;"); 636 CHECK(contextClassLoader != nullptr); 637 638 // We can't run in a transaction yet. 639 contextClassLoader->SetObject<false>( 640 soa.Self()->GetPeer(), 641 soa.Decode<mirror::ClassLoader>(system_class_loader.get()).Ptr()); 642 643 return env->NewGlobalRef(system_class_loader.get()); 644 } 645 646 std::string Runtime::GetPatchoatExecutable() const { 647 if (!patchoat_executable_.empty()) { 648 return patchoat_executable_; 649 } 650 std::string patchoat_executable(GetAndroidRoot()); 651 patchoat_executable += (kIsDebugBuild ? "/bin/patchoatd" : "/bin/patchoat"); 652 return patchoat_executable; 653 } 654 655 std::string Runtime::GetCompilerExecutable() const { 656 if (!compiler_executable_.empty()) { 657 return compiler_executable_; 658 } 659 std::string compiler_executable(GetAndroidRoot()); 660 compiler_executable += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat"); 661 return compiler_executable; 662 } 663 664 bool Runtime::Start() { 665 VLOG(startup) << "Runtime::Start entering"; 666 667 CHECK(!no_sig_chain_) << "A started runtime should have sig chain enabled"; 668 669 // If a debug host build, disable ptrace restriction for debugging and test timeout thread dump. 670 // Only 64-bit as prctl() may fail in 32 bit userspace on a 64-bit kernel. 671 #if defined(__linux__) && !defined(ART_TARGET_ANDROID) && defined(__x86_64__) 672 if (kIsDebugBuild) { 673 CHECK_EQ(prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY), 0); 674 } 675 #endif 676 677 // Restore main thread state to kNative as expected by native code. 678 Thread* self = Thread::Current(); 679 680 self->TransitionFromRunnableToSuspended(kNative); 681 682 started_ = true; 683 684 if (!IsImageDex2OatEnabled() || !GetHeap()->HasBootImageSpace()) { 685 ScopedObjectAccess soa(self); 686 StackHandleScope<2> hs(soa.Self()); 687 688 auto class_class(hs.NewHandle<mirror::Class>(mirror::Class::GetJavaLangClass())); 689 auto field_class(hs.NewHandle<mirror::Class>(mirror::Field::StaticClass())); 690 691 class_linker_->EnsureInitialized(soa.Self(), class_class, true, true); 692 // Field class is needed for register_java_net_InetAddress in libcore, b/28153851. 693 class_linker_->EnsureInitialized(soa.Self(), field_class, true, true); 694 } 695 696 // InitNativeMethods needs to be after started_ so that the classes 697 // it touches will have methods linked to the oat file if necessary. 698 { 699 ScopedTrace trace2("InitNativeMethods"); 700 InitNativeMethods(); 701 } 702 703 // Initialize well known thread group values that may be accessed threads while attaching. 704 InitThreadGroups(self); 705 706 Thread::FinishStartup(); 707 708 // Create the JIT either if we have to use JIT compilation or save profiling info. This is 709 // done after FinishStartup as the JIT pool needs Java thread peers, which require the main 710 // ThreadGroup to exist. 711 // 712 // TODO(calin): We use the JIT class as a proxy for JIT compilation and for 713 // recoding profiles. Maybe we should consider changing the name to be more clear it's 714 // not only about compiling. b/28295073. 715 if (jit_options_->UseJitCompilation() || jit_options_->GetSaveProfilingInfo()) { 716 std::string error_msg; 717 if (!IsZygote()) { 718 // If we are the zygote then we need to wait until after forking to create the code cache 719 // due to SELinux restrictions on r/w/x memory regions. 720 CreateJit(); 721 } else if (jit_options_->UseJitCompilation()) { 722 if (!jit::Jit::LoadCompilerLibrary(&error_msg)) { 723 // Try to load compiler pre zygote to reduce PSS. b/27744947 724 LOG(WARNING) << "Failed to load JIT compiler with error " << error_msg; 725 } 726 } 727 } 728 729 // Send the start phase event. We have to wait till here as this is when the main thread peer 730 // has just been generated, important root clinits have been run and JNI is completely functional. 731 { 732 ScopedObjectAccess soa(self); 733 callbacks_->NextRuntimePhase(RuntimePhaseCallback::RuntimePhase::kStart); 734 } 735 736 system_class_loader_ = CreateSystemClassLoader(this); 737 738 if (!is_zygote_) { 739 if (is_native_bridge_loaded_) { 740 PreInitializeNativeBridge("."); 741 } 742 NativeBridgeAction action = force_native_bridge_ 743 ? NativeBridgeAction::kInitialize 744 : NativeBridgeAction::kUnload; 745 InitNonZygoteOrPostFork(self->GetJniEnv(), 746 /* is_system_server */ false, 747 action, 748 GetInstructionSetString(kRuntimeISA)); 749 } 750 751 // Send the initialized phase event. Send it before starting daemons, as otherwise 752 // sending thread events becomes complicated. 753 { 754 ScopedObjectAccess soa(self); 755 callbacks_->NextRuntimePhase(RuntimePhaseCallback::RuntimePhase::kInit); 756 } 757 758 StartDaemonThreads(); 759 760 { 761 ScopedObjectAccess soa(self); 762 self->GetJniEnv()->locals.AssertEmpty(); 763 } 764 765 VLOG(startup) << "Runtime::Start exiting"; 766 finished_starting_ = true; 767 768 if (trace_config_.get() != nullptr && trace_config_->trace_file != "") { 769 ScopedThreadStateChange tsc(self, kWaitingForMethodTracingStart); 770 Trace::Start(trace_config_->trace_file.c_str(), 771 -1, 772 static_cast<int>(trace_config_->trace_file_size), 773 0, 774 trace_config_->trace_output_mode, 775 trace_config_->trace_mode, 776 0); 777 } 778 779 return true; 780 } 781 782 void Runtime::EndThreadBirth() REQUIRES(Locks::runtime_shutdown_lock_) { 783 DCHECK_GT(threads_being_born_, 0U); 784 threads_being_born_--; 785 if (shutting_down_started_ && threads_being_born_ == 0) { 786 shutdown_cond_->Broadcast(Thread::Current()); 787 } 788 } 789 790 void Runtime::InitNonZygoteOrPostFork( 791 JNIEnv* env, bool is_system_server, NativeBridgeAction action, const char* isa) { 792 is_zygote_ = false; 793 794 if (is_native_bridge_loaded_) { 795 switch (action) { 796 case NativeBridgeAction::kUnload: 797 UnloadNativeBridge(); 798 is_native_bridge_loaded_ = false; 799 break; 800 801 case NativeBridgeAction::kInitialize: 802 InitializeNativeBridge(env, isa); 803 break; 804 } 805 } 806 807 // Create the thread pools. 808 heap_->CreateThreadPool(); 809 // Reset the gc performance data at zygote fork so that the GCs 810 // before fork aren't attributed to an app. 811 heap_->ResetGcPerformanceInfo(); 812 813 // We may want to collect profiling samples for system server, but we never want to JIT there. 814 if ((!is_system_server || !jit_options_->UseJitCompilation()) && 815 !safe_mode_ && 816 (jit_options_->UseJitCompilation() || jit_options_->GetSaveProfilingInfo()) && 817 jit_ == nullptr) { 818 // Note that when running ART standalone (not zygote, nor zygote fork), 819 // the jit may have already been created. 820 CreateJit(); 821 } 822 823 StartSignalCatcher(); 824 825 // Start the JDWP thread. If the command-line debugger flags specified "suspend=y", 826 // this will pause the runtime, so we probably want this to come last. 827 Dbg::StartJdwp(); 828 } 829 830 void Runtime::StartSignalCatcher() { 831 if (!is_zygote_) { 832 signal_catcher_ = new SignalCatcher(stack_trace_file_); 833 } 834 } 835 836 bool Runtime::IsShuttingDown(Thread* self) { 837 MutexLock mu(self, *Locks::runtime_shutdown_lock_); 838 return IsShuttingDownLocked(); 839 } 840 841 void Runtime::StartDaemonThreads() { 842 ScopedTrace trace(__FUNCTION__); 843 VLOG(startup) << "Runtime::StartDaemonThreads entering"; 844 845 Thread* self = Thread::Current(); 846 847 // Must be in the kNative state for calling native methods. 848 CHECK_EQ(self->GetState(), kNative); 849 850 JNIEnv* env = self->GetJniEnv(); 851 env->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons, 852 WellKnownClasses::java_lang_Daemons_start); 853 if (env->ExceptionCheck()) { 854 env->ExceptionDescribe(); 855 LOG(FATAL) << "Error starting java.lang.Daemons"; 856 } 857 858 VLOG(startup) << "Runtime::StartDaemonThreads exiting"; 859 } 860 861 // Attempts to open dex files from image(s). Given the image location, try to find the oat file 862 // and open it to get the stored dex file. If the image is the first for a multi-image boot 863 // classpath, go on and also open the other images. 864 static bool OpenDexFilesFromImage(const std::string& image_location, 865 std::vector<std::unique_ptr<const DexFile>>* dex_files, 866 size_t* failures) { 867 DCHECK(dex_files != nullptr) << "OpenDexFilesFromImage: out-param is nullptr"; 868 869 // Use a work-list approach, so that we can easily reuse the opening code. 870 std::vector<std::string> image_locations; 871 image_locations.push_back(image_location); 872 873 for (size_t index = 0; index < image_locations.size(); ++index) { 874 std::string system_filename; 875 bool has_system = false; 876 std::string cache_filename_unused; 877 bool dalvik_cache_exists_unused; 878 bool has_cache_unused; 879 bool is_global_cache_unused; 880 bool found_image = gc::space::ImageSpace::FindImageFilename(image_locations[index].c_str(), 881 kRuntimeISA, 882 &system_filename, 883 &has_system, 884 &cache_filename_unused, 885 &dalvik_cache_exists_unused, 886 &has_cache_unused, 887 &is_global_cache_unused); 888 889 if (!found_image || !has_system) { 890 return false; 891 } 892 893 // We are falling back to non-executable use of the oat file because patching failed, presumably 894 // due to lack of space. 895 std::string vdex_filename = 896 ImageHeader::GetVdexLocationFromImageLocation(system_filename.c_str()); 897 std::string oat_filename = 898 ImageHeader::GetOatLocationFromImageLocation(system_filename.c_str()); 899 std::string oat_location = 900 ImageHeader::GetOatLocationFromImageLocation(image_locations[index].c_str()); 901 // Note: in the multi-image case, the image location may end in ".jar," and not ".art." Handle 902 // that here. 903 if (android::base::EndsWith(oat_location, ".jar")) { 904 oat_location.replace(oat_location.length() - 3, 3, "oat"); 905 } 906 std::string error_msg; 907 908 std::unique_ptr<VdexFile> vdex_file(VdexFile::Open(vdex_filename, 909 false /* writable */, 910 false /* low_4gb */, 911 false, /* unquicken */ 912 &error_msg)); 913 if (vdex_file.get() == nullptr) { 914 return false; 915 } 916 917 std::unique_ptr<File> file(OS::OpenFileForReading(oat_filename.c_str())); 918 if (file.get() == nullptr) { 919 return false; 920 } 921 std::unique_ptr<ElfFile> elf_file(ElfFile::Open(file.get(), 922 false /* writable */, 923 false /* program_header_only */, 924 false /* low_4gb */, 925 &error_msg)); 926 if (elf_file.get() == nullptr) { 927 return false; 928 } 929 std::unique_ptr<const OatFile> oat_file( 930 OatFile::OpenWithElfFile(elf_file.release(), 931 vdex_file.release(), 932 oat_location, 933 nullptr, 934 &error_msg)); 935 if (oat_file == nullptr) { 936 LOG(WARNING) << "Unable to use '" << oat_filename << "' because " << error_msg; 937 return false; 938 } 939 940 for (const OatFile::OatDexFile* oat_dex_file : oat_file->GetOatDexFiles()) { 941 if (oat_dex_file == nullptr) { 942 *failures += 1; 943 continue; 944 } 945 std::unique_ptr<const DexFile> dex_file = oat_dex_file->OpenDexFile(&error_msg); 946 if (dex_file.get() == nullptr) { 947 *failures += 1; 948 } else { 949 dex_files->push_back(std::move(dex_file)); 950 } 951 } 952 953 if (index == 0) { 954 // First file. See if this is a multi-image environment, and if so, enqueue the other images. 955 const OatHeader& boot_oat_header = oat_file->GetOatHeader(); 956 const char* boot_cp = boot_oat_header.GetStoreValueByKey(OatHeader::kBootClassPathKey); 957 if (boot_cp != nullptr) { 958 gc::space::ImageSpace::ExtractMultiImageLocations(image_locations[0], 959 boot_cp, 960 &image_locations); 961 } 962 } 963 964 Runtime::Current()->GetOatFileManager().RegisterOatFile(std::move(oat_file)); 965 } 966 return true; 967 } 968 969 970 static size_t OpenDexFiles(const std::vector<std::string>& dex_filenames, 971 const std::vector<std::string>& dex_locations, 972 const std::string& image_location, 973 std::vector<std::unique_ptr<const DexFile>>* dex_files) { 974 DCHECK(dex_files != nullptr) << "OpenDexFiles: out-param is nullptr"; 975 size_t failure_count = 0; 976 if (!image_location.empty() && OpenDexFilesFromImage(image_location, dex_files, &failure_count)) { 977 return failure_count; 978 } 979 failure_count = 0; 980 for (size_t i = 0; i < dex_filenames.size(); i++) { 981 const char* dex_filename = dex_filenames[i].c_str(); 982 const char* dex_location = dex_locations[i].c_str(); 983 static constexpr bool kVerifyChecksum = true; 984 std::string error_msg; 985 if (!OS::FileExists(dex_filename)) { 986 LOG(WARNING) << "Skipping non-existent dex file '" << dex_filename << "'"; 987 continue; 988 } 989 if (!DexFile::Open(dex_filename, dex_location, kVerifyChecksum, &error_msg, dex_files)) { 990 LOG(WARNING) << "Failed to open .dex from file '" << dex_filename << "': " << error_msg; 991 ++failure_count; 992 } 993 } 994 return failure_count; 995 } 996 997 void Runtime::SetSentinel(mirror::Object* sentinel) { 998 CHECK(sentinel_.Read() == nullptr); 999 CHECK(sentinel != nullptr); 1000 CHECK(!heap_->IsMovableObject(sentinel)); 1001 sentinel_ = GcRoot<mirror::Object>(sentinel); 1002 } 1003 1004 bool Runtime::Init(RuntimeArgumentMap&& runtime_options_in) { 1005 // (b/30160149): protect subprocesses from modifications to LD_LIBRARY_PATH, etc. 1006 // Take a snapshot of the environment at the time the runtime was created, for use by Exec, etc. 1007 env_snapshot_.TakeSnapshot(); 1008 1009 RuntimeArgumentMap runtime_options(std::move(runtime_options_in)); 1010 ScopedTrace trace(__FUNCTION__); 1011 CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize); 1012 1013 MemMap::Init(); 1014 1015 using Opt = RuntimeArgumentMap; 1016 VLOG(startup) << "Runtime::Init -verbose:startup enabled"; 1017 1018 QuasiAtomic::Startup(); 1019 1020 oat_file_manager_ = new OatFileManager; 1021 1022 Thread::SetSensitiveThreadHook(runtime_options.GetOrDefault(Opt::HookIsSensitiveThread)); 1023 Monitor::Init(runtime_options.GetOrDefault(Opt::LockProfThreshold)); 1024 1025 boot_class_path_string_ = runtime_options.ReleaseOrDefault(Opt::BootClassPath); 1026 class_path_string_ = runtime_options.ReleaseOrDefault(Opt::ClassPath); 1027 properties_ = runtime_options.ReleaseOrDefault(Opt::PropertiesList); 1028 1029 compiler_callbacks_ = runtime_options.GetOrDefault(Opt::CompilerCallbacksPtr); 1030 patchoat_executable_ = runtime_options.ReleaseOrDefault(Opt::PatchOat); 1031 must_relocate_ = runtime_options.GetOrDefault(Opt::Relocate); 1032 is_zygote_ = runtime_options.Exists(Opt::Zygote); 1033 is_explicit_gc_disabled_ = runtime_options.Exists(Opt::DisableExplicitGC); 1034 dex2oat_enabled_ = runtime_options.GetOrDefault(Opt::Dex2Oat); 1035 image_dex2oat_enabled_ = runtime_options.GetOrDefault(Opt::ImageDex2Oat); 1036 dump_native_stack_on_sig_quit_ = runtime_options.GetOrDefault(Opt::DumpNativeStackOnSigQuit); 1037 1038 vfprintf_ = runtime_options.GetOrDefault(Opt::HookVfprintf); 1039 exit_ = runtime_options.GetOrDefault(Opt::HookExit); 1040 abort_ = runtime_options.GetOrDefault(Opt::HookAbort); 1041 1042 default_stack_size_ = runtime_options.GetOrDefault(Opt::StackSize); 1043 stack_trace_file_ = runtime_options.ReleaseOrDefault(Opt::StackTraceFile); 1044 1045 compiler_executable_ = runtime_options.ReleaseOrDefault(Opt::Compiler); 1046 compiler_options_ = runtime_options.ReleaseOrDefault(Opt::CompilerOptions); 1047 for (StringPiece option : Runtime::Current()->GetCompilerOptions()) { 1048 if (option.starts_with("--debuggable")) { 1049 SetJavaDebuggable(true); 1050 break; 1051 } 1052 } 1053 image_compiler_options_ = runtime_options.ReleaseOrDefault(Opt::ImageCompilerOptions); 1054 image_location_ = runtime_options.GetOrDefault(Opt::Image); 1055 1056 max_spins_before_thin_lock_inflation_ = 1057 runtime_options.GetOrDefault(Opt::MaxSpinsBeforeThinLockInflation); 1058 1059 monitor_list_ = new MonitorList; 1060 monitor_pool_ = MonitorPool::Create(); 1061 thread_list_ = new ThreadList(runtime_options.GetOrDefault(Opt::ThreadSuspendTimeout)); 1062 intern_table_ = new InternTable; 1063 1064 verify_ = runtime_options.GetOrDefault(Opt::Verify); 1065 allow_dex_file_fallback_ = !runtime_options.Exists(Opt::NoDexFileFallback); 1066 1067 no_sig_chain_ = runtime_options.Exists(Opt::NoSigChain); 1068 force_native_bridge_ = runtime_options.Exists(Opt::ForceNativeBridge); 1069 1070 Split(runtime_options.GetOrDefault(Opt::CpuAbiList), ',', &cpu_abilist_); 1071 1072 fingerprint_ = runtime_options.ReleaseOrDefault(Opt::Fingerprint); 1073 1074 if (runtime_options.GetOrDefault(Opt::Interpret)) { 1075 GetInstrumentation()->ForceInterpretOnly(); 1076 } 1077 1078 zygote_max_failed_boots_ = runtime_options.GetOrDefault(Opt::ZygoteMaxFailedBoots); 1079 experimental_flags_ = runtime_options.GetOrDefault(Opt::Experimental); 1080 is_low_memory_mode_ = runtime_options.Exists(Opt::LowMemoryMode); 1081 1082 plugins_ = runtime_options.ReleaseOrDefault(Opt::Plugins); 1083 agents_ = runtime_options.ReleaseOrDefault(Opt::AgentPath); 1084 // TODO Add back in -agentlib 1085 // for (auto lib : runtime_options.ReleaseOrDefault(Opt::AgentLib)) { 1086 // agents_.push_back(lib); 1087 // } 1088 1089 XGcOption xgc_option = runtime_options.GetOrDefault(Opt::GcOption); 1090 heap_ = new gc::Heap(runtime_options.GetOrDefault(Opt::MemoryInitialSize), 1091 runtime_options.GetOrDefault(Opt::HeapGrowthLimit), 1092 runtime_options.GetOrDefault(Opt::HeapMinFree), 1093 runtime_options.GetOrDefault(Opt::HeapMaxFree), 1094 runtime_options.GetOrDefault(Opt::HeapTargetUtilization), 1095 runtime_options.GetOrDefault(Opt::ForegroundHeapGrowthMultiplier), 1096 runtime_options.GetOrDefault(Opt::MemoryMaximumSize), 1097 runtime_options.GetOrDefault(Opt::NonMovingSpaceCapacity), 1098 runtime_options.GetOrDefault(Opt::Image), 1099 runtime_options.GetOrDefault(Opt::ImageInstructionSet), 1100 // Override the collector type to CC if the read barrier config. 1101 kUseReadBarrier ? gc::kCollectorTypeCC : xgc_option.collector_type_, 1102 kUseReadBarrier ? BackgroundGcOption(gc::kCollectorTypeCCBackground) 1103 : runtime_options.GetOrDefault(Opt::BackgroundGc), 1104 runtime_options.GetOrDefault(Opt::LargeObjectSpace), 1105 runtime_options.GetOrDefault(Opt::LargeObjectThreshold), 1106 runtime_options.GetOrDefault(Opt::ParallelGCThreads), 1107 runtime_options.GetOrDefault(Opt::ConcGCThreads), 1108 runtime_options.Exists(Opt::LowMemoryMode), 1109 runtime_options.GetOrDefault(Opt::LongPauseLogThreshold), 1110 runtime_options.GetOrDefault(Opt::LongGCLogThreshold), 1111 runtime_options.Exists(Opt::IgnoreMaxFootprint), 1112 runtime_options.GetOrDefault(Opt::UseTLAB), 1113 xgc_option.verify_pre_gc_heap_, 1114 xgc_option.verify_pre_sweeping_heap_, 1115 xgc_option.verify_post_gc_heap_, 1116 xgc_option.verify_pre_gc_rosalloc_, 1117 xgc_option.verify_pre_sweeping_rosalloc_, 1118 xgc_option.verify_post_gc_rosalloc_, 1119 xgc_option.gcstress_, 1120 xgc_option.measure_, 1121 runtime_options.GetOrDefault(Opt::EnableHSpaceCompactForOOM), 1122 runtime_options.GetOrDefault(Opt::HSpaceCompactForOOMMinIntervalsMs)); 1123 1124 if (!heap_->HasBootImageSpace() && !allow_dex_file_fallback_) { 1125 LOG(ERROR) << "Dex file fallback disabled, cannot continue without image."; 1126 return false; 1127 } 1128 1129 dump_gc_performance_on_shutdown_ = runtime_options.Exists(Opt::DumpGCPerformanceOnShutdown); 1130 1131 if (runtime_options.Exists(Opt::JdwpOptions)) { 1132 Dbg::ConfigureJdwp(runtime_options.GetOrDefault(Opt::JdwpOptions)); 1133 } 1134 callbacks_->AddThreadLifecycleCallback(Dbg::GetThreadLifecycleCallback()); 1135 callbacks_->AddClassLoadCallback(Dbg::GetClassLoadCallback()); 1136 1137 jit_options_.reset(jit::JitOptions::CreateFromRuntimeArguments(runtime_options)); 1138 if (IsAotCompiler()) { 1139 // If we are already the compiler at this point, we must be dex2oat. Don't create the jit in 1140 // this case. 1141 // If runtime_options doesn't have UseJIT set to true then CreateFromRuntimeArguments returns 1142 // null and we don't create the jit. 1143 jit_options_->SetUseJitCompilation(false); 1144 jit_options_->SetSaveProfilingInfo(false); 1145 } 1146 1147 // Use MemMap arena pool for jit, malloc otherwise. Malloc arenas are faster to allocate but 1148 // can't be trimmed as easily. 1149 const bool use_malloc = IsAotCompiler(); 1150 arena_pool_.reset(new ArenaPool(use_malloc, /* low_4gb */ false)); 1151 jit_arena_pool_.reset( 1152 new ArenaPool(/* use_malloc */ false, /* low_4gb */ false, "CompilerMetadata")); 1153 1154 if (IsAotCompiler() && Is64BitInstructionSet(kRuntimeISA)) { 1155 // 4gb, no malloc. Explanation in header. 1156 low_4gb_arena_pool_.reset(new ArenaPool(/* use_malloc */ false, /* low_4gb */ true)); 1157 } 1158 linear_alloc_.reset(CreateLinearAlloc()); 1159 1160 BlockSignals(); 1161 InitPlatformSignalHandlers(); 1162 1163 // Change the implicit checks flags based on runtime architecture. 1164 switch (kRuntimeISA) { 1165 case kArm: 1166 case kThumb2: 1167 case kX86: 1168 case kArm64: 1169 case kX86_64: 1170 case kMips: 1171 case kMips64: 1172 implicit_null_checks_ = true; 1173 // Installing stack protection does not play well with valgrind. 1174 implicit_so_checks_ = !(RUNNING_ON_MEMORY_TOOL && kMemoryToolIsValgrind); 1175 break; 1176 default: 1177 // Keep the defaults. 1178 break; 1179 } 1180 1181 if (!no_sig_chain_) { 1182 // Dex2Oat's Runtime does not need the signal chain or the fault handler. 1183 if (implicit_null_checks_ || implicit_so_checks_ || implicit_suspend_checks_) { 1184 fault_manager.Init(); 1185 1186 // These need to be in a specific order. The null point check handler must be 1187 // after the suspend check and stack overflow check handlers. 1188 // 1189 // Note: the instances attach themselves to the fault manager and are handled by it. The manager 1190 // will delete the instance on Shutdown(). 1191 if (implicit_suspend_checks_) { 1192 new SuspensionHandler(&fault_manager); 1193 } 1194 1195 if (implicit_so_checks_) { 1196 new StackOverflowHandler(&fault_manager); 1197 } 1198 1199 if (implicit_null_checks_) { 1200 new NullPointerHandler(&fault_manager); 1201 } 1202 1203 if (kEnableJavaStackTraceHandler) { 1204 new JavaStackTraceHandler(&fault_manager); 1205 } 1206 } 1207 } 1208 1209 std::string error_msg; 1210 java_vm_ = JavaVMExt::Create(this, runtime_options, &error_msg); 1211 if (java_vm_.get() == nullptr) { 1212 LOG(ERROR) << "Could not initialize JavaVMExt: " << error_msg; 1213 return false; 1214 } 1215 1216 // Add the JniEnv handler. 1217 // TODO Refactor this stuff. 1218 java_vm_->AddEnvironmentHook(JNIEnvExt::GetEnvHandler); 1219 1220 Thread::Startup(); 1221 1222 // ClassLinker needs an attached thread, but we can't fully attach a thread without creating 1223 // objects. We can't supply a thread group yet; it will be fixed later. Since we are the main 1224 // thread, we do not get a java peer. 1225 Thread* self = Thread::Attach("main", false, nullptr, false); 1226 CHECK_EQ(self->GetThreadId(), ThreadList::kMainThreadId); 1227 CHECK(self != nullptr); 1228 1229 self->SetCanCallIntoJava(!IsAotCompiler()); 1230 1231 // Set us to runnable so tools using a runtime can allocate and GC by default 1232 self->TransitionFromSuspendedToRunnable(); 1233 1234 // Now we're attached, we can take the heap locks and validate the heap. 1235 GetHeap()->EnableObjectValidation(); 1236 1237 CHECK_GE(GetHeap()->GetContinuousSpaces().size(), 1U); 1238 class_linker_ = new ClassLinker(intern_table_); 1239 cha_ = new ClassHierarchyAnalysis; 1240 if (GetHeap()->HasBootImageSpace()) { 1241 bool result = class_linker_->InitFromBootImage(&error_msg); 1242 if (!result) { 1243 LOG(ERROR) << "Could not initialize from image: " << error_msg; 1244 return false; 1245 } 1246 if (kIsDebugBuild) { 1247 for (auto image_space : GetHeap()->GetBootImageSpaces()) { 1248 image_space->VerifyImageAllocations(); 1249 } 1250 } 1251 if (boot_class_path_string_.empty()) { 1252 // The bootclasspath is not explicitly specified: construct it from the loaded dex files. 1253 const std::vector<const DexFile*>& boot_class_path = GetClassLinker()->GetBootClassPath(); 1254 std::vector<std::string> dex_locations; 1255 dex_locations.reserve(boot_class_path.size()); 1256 for (const DexFile* dex_file : boot_class_path) { 1257 dex_locations.push_back(dex_file->GetLocation()); 1258 } 1259 boot_class_path_string_ = android::base::Join(dex_locations, ':'); 1260 } 1261 { 1262 ScopedTrace trace2("AddImageStringsToTable"); 1263 GetInternTable()->AddImagesStringsToTable(heap_->GetBootImageSpaces()); 1264 } 1265 if (IsJavaDebuggable()) { 1266 // Now that we have loaded the boot image, deoptimize its methods if we are running 1267 // debuggable, as the code may have been compiled non-debuggable. 1268 DeoptimizeBootImage(); 1269 } 1270 } else { 1271 std::vector<std::string> dex_filenames; 1272 Split(boot_class_path_string_, ':', &dex_filenames); 1273 1274 std::vector<std::string> dex_locations; 1275 if (!runtime_options.Exists(Opt::BootClassPathLocations)) { 1276 dex_locations = dex_filenames; 1277 } else { 1278 dex_locations = runtime_options.GetOrDefault(Opt::BootClassPathLocations); 1279 CHECK_EQ(dex_filenames.size(), dex_locations.size()); 1280 } 1281 1282 std::vector<std::unique_ptr<const DexFile>> boot_class_path; 1283 if (runtime_options.Exists(Opt::BootClassPathDexList)) { 1284 boot_class_path.swap(*runtime_options.GetOrDefault(Opt::BootClassPathDexList)); 1285 } else { 1286 OpenDexFiles(dex_filenames, 1287 dex_locations, 1288 runtime_options.GetOrDefault(Opt::Image), 1289 &boot_class_path); 1290 } 1291 instruction_set_ = runtime_options.GetOrDefault(Opt::ImageInstructionSet); 1292 if (!class_linker_->InitWithoutImage(std::move(boot_class_path), &error_msg)) { 1293 LOG(ERROR) << "Could not initialize without image: " << error_msg; 1294 return false; 1295 } 1296 1297 // TODO: Should we move the following to InitWithoutImage? 1298 SetInstructionSet(instruction_set_); 1299 for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) { 1300 Runtime::CalleeSaveType type = Runtime::CalleeSaveType(i); 1301 if (!HasCalleeSaveMethod(type)) { 1302 SetCalleeSaveMethod(CreateCalleeSaveMethod(), type); 1303 } 1304 } 1305 } 1306 1307 CHECK(class_linker_ != nullptr); 1308 1309 verifier::MethodVerifier::Init(); 1310 1311 if (runtime_options.Exists(Opt::MethodTrace)) { 1312 trace_config_.reset(new TraceConfig()); 1313 trace_config_->trace_file = runtime_options.ReleaseOrDefault(Opt::MethodTraceFile); 1314 trace_config_->trace_file_size = runtime_options.ReleaseOrDefault(Opt::MethodTraceFileSize); 1315 trace_config_->trace_mode = Trace::TraceMode::kMethodTracing; 1316 trace_config_->trace_output_mode = runtime_options.Exists(Opt::MethodTraceStreaming) ? 1317 Trace::TraceOutputMode::kStreaming : 1318 Trace::TraceOutputMode::kFile; 1319 } 1320 1321 // TODO: move this to just be an Trace::Start argument 1322 Trace::SetDefaultClockSource(runtime_options.GetOrDefault(Opt::ProfileClock)); 1323 1324 // Pre-allocate an OutOfMemoryError for the double-OOME case. 1325 self->ThrowNewException("Ljava/lang/OutOfMemoryError;", 1326 "OutOfMemoryError thrown while trying to throw OutOfMemoryError; " 1327 "no stack trace available"); 1328 pre_allocated_OutOfMemoryError_ = GcRoot<mirror::Throwable>(self->GetException()); 1329 self->ClearException(); 1330 1331 // Pre-allocate a NoClassDefFoundError for the common case of failing to find a system class 1332 // ahead of checking the application's class loader. 1333 self->ThrowNewException("Ljava/lang/NoClassDefFoundError;", 1334 "Class not found using the boot class loader; no stack trace available"); 1335 pre_allocated_NoClassDefFoundError_ = GcRoot<mirror::Throwable>(self->GetException()); 1336 self->ClearException(); 1337 1338 // Runtime initialization is largely done now. 1339 // We load plugins first since that can modify the runtime state slightly. 1340 // Load all plugins 1341 for (auto& plugin : plugins_) { 1342 std::string err; 1343 if (!plugin.Load(&err)) { 1344 LOG(FATAL) << plugin << " failed to load: " << err; 1345 } 1346 } 1347 1348 // Look for a native bridge. 1349 // 1350 // The intended flow here is, in the case of a running system: 1351 // 1352 // Runtime::Init() (zygote): 1353 // LoadNativeBridge -> dlopen from cmd line parameter. 1354 // | 1355 // V 1356 // Runtime::Start() (zygote): 1357 // No-op wrt native bridge. 1358 // | 1359 // | start app 1360 // V 1361 // DidForkFromZygote(action) 1362 // action = kUnload -> dlclose native bridge. 1363 // action = kInitialize -> initialize library 1364 // 1365 // 1366 // The intended flow here is, in the case of a simple dalvikvm call: 1367 // 1368 // Runtime::Init(): 1369 // LoadNativeBridge -> dlopen from cmd line parameter. 1370 // | 1371 // V 1372 // Runtime::Start(): 1373 // DidForkFromZygote(kInitialize) -> try to initialize any native bridge given. 1374 // No-op wrt native bridge. 1375 { 1376 std::string native_bridge_file_name = runtime_options.ReleaseOrDefault(Opt::NativeBridge); 1377 is_native_bridge_loaded_ = LoadNativeBridge(native_bridge_file_name); 1378 } 1379 1380 // Startup agents 1381 // TODO Maybe we should start a new thread to run these on. Investigate RI behavior more. 1382 for (auto& agent : agents_) { 1383 // TODO Check err 1384 int res = 0; 1385 std::string err = ""; 1386 ti::Agent::LoadError result = agent.Load(&res, &err); 1387 if (result == ti::Agent::kInitializationError) { 1388 LOG(FATAL) << "Unable to initialize agent!"; 1389 } else if (result != ti::Agent::kNoError) { 1390 LOG(ERROR) << "Unable to load an agent: " << err; 1391 } 1392 } 1393 { 1394 ScopedObjectAccess soa(self); 1395 callbacks_->NextRuntimePhase(RuntimePhaseCallback::RuntimePhase::kInitialAgents); 1396 } 1397 1398 VLOG(startup) << "Runtime::Init exiting"; 1399 1400 return true; 1401 } 1402 1403 static bool EnsureJvmtiPlugin(Runtime* runtime, 1404 std::vector<Plugin>* plugins, 1405 std::string* error_msg) { 1406 constexpr const char* plugin_name = kIsDebugBuild ? "libopenjdkjvmtid.so" : "libopenjdkjvmti.so"; 1407 1408 // Is the plugin already loaded? 1409 for (const Plugin& p : *plugins) { 1410 if (p.GetLibrary() == plugin_name) { 1411 return true; 1412 } 1413 } 1414 1415 // Is the process debuggable? Otherwise, do not attempt to load the plugin. 1416 if (!runtime->IsJavaDebuggable()) { 1417 *error_msg = "Process is not debuggable."; 1418 return false; 1419 } 1420 1421 Plugin new_plugin = Plugin::Create(plugin_name); 1422 1423 if (!new_plugin.Load(error_msg)) { 1424 return false; 1425 } 1426 1427 plugins->push_back(std::move(new_plugin)); 1428 return true; 1429 } 1430 1431 // Attach a new agent and add it to the list of runtime agents 1432 // 1433 // TODO: once we decide on the threading model for agents, 1434 // revisit this and make sure we're doing this on the right thread 1435 // (and we synchronize access to any shared data structures like "agents_") 1436 // 1437 void Runtime::AttachAgent(const std::string& agent_arg) { 1438 std::string error_msg; 1439 if (!EnsureJvmtiPlugin(this, &plugins_, &error_msg)) { 1440 LOG(WARNING) << "Could not load plugin: " << error_msg; 1441 ScopedObjectAccess soa(Thread::Current()); 1442 ThrowIOException("%s", error_msg.c_str()); 1443 return; 1444 } 1445 1446 ti::Agent agent(agent_arg); 1447 1448 int res = 0; 1449 ti::Agent::LoadError result = agent.Attach(&res, &error_msg); 1450 1451 if (result == ti::Agent::kNoError) { 1452 agents_.push_back(std::move(agent)); 1453 } else { 1454 LOG(WARNING) << "Agent attach failed (result=" << result << ") : " << error_msg; 1455 ScopedObjectAccess soa(Thread::Current()); 1456 ThrowIOException("%s", error_msg.c_str()); 1457 } 1458 } 1459 1460 void Runtime::InitNativeMethods() { 1461 VLOG(startup) << "Runtime::InitNativeMethods entering"; 1462 Thread* self = Thread::Current(); 1463 JNIEnv* env = self->GetJniEnv(); 1464 1465 // Must be in the kNative state for calling native methods (JNI_OnLoad code). 1466 CHECK_EQ(self->GetState(), kNative); 1467 1468 // First set up JniConstants, which is used by both the runtime's built-in native 1469 // methods and libcore. 1470 JniConstants::init(env); 1471 1472 // Then set up the native methods provided by the runtime itself. 1473 RegisterRuntimeNativeMethods(env); 1474 1475 // Initialize classes used in JNI. The initialization requires runtime native 1476 // methods to be loaded first. 1477 WellKnownClasses::Init(env); 1478 1479 // Then set up libjavacore / libopenjdk, which are just a regular JNI libraries with 1480 // a regular JNI_OnLoad. Most JNI libraries can just use System.loadLibrary, but 1481 // libcore can't because it's the library that implements System.loadLibrary! 1482 { 1483 std::string error_msg; 1484 if (!java_vm_->LoadNativeLibrary(env, "libjavacore.so", nullptr, nullptr, &error_msg)) { 1485 LOG(FATAL) << "LoadNativeLibrary failed for \"libjavacore.so\": " << error_msg; 1486 } 1487 } 1488 { 1489 constexpr const char* kOpenJdkLibrary = kIsDebugBuild 1490 ? "libopenjdkd.so" 1491 : "libopenjdk.so"; 1492 std::string error_msg; 1493 if (!java_vm_->LoadNativeLibrary(env, kOpenJdkLibrary, nullptr, nullptr, &error_msg)) { 1494 LOG(FATAL) << "LoadNativeLibrary failed for \"" << kOpenJdkLibrary << "\": " << error_msg; 1495 } 1496 } 1497 1498 // Initialize well known classes that may invoke runtime native methods. 1499 WellKnownClasses::LateInit(env); 1500 1501 VLOG(startup) << "Runtime::InitNativeMethods exiting"; 1502 } 1503 1504 void Runtime::ReclaimArenaPoolMemory() { 1505 arena_pool_->LockReclaimMemory(); 1506 } 1507 1508 void Runtime::InitThreadGroups(Thread* self) { 1509 JNIEnvExt* env = self->GetJniEnv(); 1510 ScopedJniEnvLocalRefState env_state(env); 1511 main_thread_group_ = 1512 env->NewGlobalRef(env->GetStaticObjectField( 1513 WellKnownClasses::java_lang_ThreadGroup, 1514 WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup)); 1515 CHECK(main_thread_group_ != nullptr || IsAotCompiler()); 1516 system_thread_group_ = 1517 env->NewGlobalRef(env->GetStaticObjectField( 1518 WellKnownClasses::java_lang_ThreadGroup, 1519 WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup)); 1520 CHECK(system_thread_group_ != nullptr || IsAotCompiler()); 1521 } 1522 1523 jobject Runtime::GetMainThreadGroup() const { 1524 CHECK(main_thread_group_ != nullptr || IsAotCompiler()); 1525 return main_thread_group_; 1526 } 1527 1528 jobject Runtime::GetSystemThreadGroup() const { 1529 CHECK(system_thread_group_ != nullptr || IsAotCompiler()); 1530 return system_thread_group_; 1531 } 1532 1533 jobject Runtime::GetSystemClassLoader() const { 1534 CHECK(system_class_loader_ != nullptr || IsAotCompiler()); 1535 return system_class_loader_; 1536 } 1537 1538 void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) { 1539 register_dalvik_system_DexFile(env); 1540 register_dalvik_system_VMDebug(env); 1541 register_dalvik_system_VMRuntime(env); 1542 register_dalvik_system_VMStack(env); 1543 register_dalvik_system_ZygoteHooks(env); 1544 register_java_lang_Class(env); 1545 register_java_lang_Object(env); 1546 register_java_lang_invoke_MethodHandleImpl(env); 1547 register_java_lang_ref_FinalizerReference(env); 1548 register_java_lang_reflect_Array(env); 1549 register_java_lang_reflect_Constructor(env); 1550 register_java_lang_reflect_Executable(env); 1551 register_java_lang_reflect_Field(env); 1552 register_java_lang_reflect_Method(env); 1553 register_java_lang_reflect_Parameter(env); 1554 register_java_lang_reflect_Proxy(env); 1555 register_java_lang_ref_Reference(env); 1556 register_java_lang_String(env); 1557 register_java_lang_StringFactory(env); 1558 register_java_lang_System(env); 1559 register_java_lang_Thread(env); 1560 register_java_lang_Throwable(env); 1561 register_java_lang_VMClassLoader(env); 1562 register_java_lang_Void(env); 1563 register_java_util_concurrent_atomic_AtomicLong(env); 1564 register_libcore_util_CharsetUtils(env); 1565 register_org_apache_harmony_dalvik_ddmc_DdmServer(env); 1566 register_org_apache_harmony_dalvik_ddmc_DdmVmInternal(env); 1567 register_sun_misc_Unsafe(env); 1568 } 1569 1570 std::ostream& operator<<(std::ostream& os, const DeoptimizationKind& kind) { 1571 os << GetDeoptimizationKindName(kind); 1572 return os; 1573 } 1574 1575 void Runtime::DumpDeoptimizations(std::ostream& os) { 1576 for (size_t i = 0; i <= static_cast<size_t>(DeoptimizationKind::kLast); ++i) { 1577 if (deoptimization_counts_[i] != 0) { 1578 os << "Number of " 1579 << GetDeoptimizationKindName(static_cast<DeoptimizationKind>(i)) 1580 << " deoptimizations: " 1581 << deoptimization_counts_[i] 1582 << "\n"; 1583 } 1584 } 1585 } 1586 1587 void Runtime::DumpForSigQuit(std::ostream& os) { 1588 GetClassLinker()->DumpForSigQuit(os); 1589 GetInternTable()->DumpForSigQuit(os); 1590 GetJavaVM()->DumpForSigQuit(os); 1591 GetHeap()->DumpForSigQuit(os); 1592 oat_file_manager_->DumpForSigQuit(os); 1593 if (GetJit() != nullptr) { 1594 GetJit()->DumpForSigQuit(os); 1595 } else { 1596 os << "Running non JIT\n"; 1597 } 1598 DumpDeoptimizations(os); 1599 TrackedAllocators::Dump(os); 1600 os << "\n"; 1601 1602 thread_list_->DumpForSigQuit(os); 1603 BaseMutex::DumpAll(os); 1604 1605 // Inform anyone else who is interested in SigQuit. 1606 { 1607 ScopedObjectAccess soa(Thread::Current()); 1608 callbacks_->SigQuit(); 1609 } 1610 } 1611 1612 void Runtime::DumpLockHolders(std::ostream& os) { 1613 uint64_t mutator_lock_owner = Locks::mutator_lock_->GetExclusiveOwnerTid(); 1614 pid_t thread_list_lock_owner = GetThreadList()->GetLockOwner(); 1615 pid_t classes_lock_owner = GetClassLinker()->GetClassesLockOwner(); 1616 pid_t dex_lock_owner = GetClassLinker()->GetDexLockOwner(); 1617 if ((thread_list_lock_owner | classes_lock_owner | dex_lock_owner) != 0) { 1618 os << "Mutator lock exclusive owner tid: " << mutator_lock_owner << "\n" 1619 << "ThreadList lock owner tid: " << thread_list_lock_owner << "\n" 1620 << "ClassLinker classes lock owner tid: " << classes_lock_owner << "\n" 1621 << "ClassLinker dex lock owner tid: " << dex_lock_owner << "\n"; 1622 } 1623 } 1624 1625 void Runtime::SetStatsEnabled(bool new_state) { 1626 Thread* self = Thread::Current(); 1627 MutexLock mu(self, *Locks::instrument_entrypoints_lock_); 1628 if (new_state == true) { 1629 GetStats()->Clear(~0); 1630 // TODO: wouldn't it make more sense to clear _all_ threads' stats? 1631 self->GetStats()->Clear(~0); 1632 if (stats_enabled_ != new_state) { 1633 GetInstrumentation()->InstrumentQuickAllocEntryPointsLocked(); 1634 } 1635 } else if (stats_enabled_ != new_state) { 1636 GetInstrumentation()->UninstrumentQuickAllocEntryPointsLocked(); 1637 } 1638 stats_enabled_ = new_state; 1639 } 1640 1641 void Runtime::ResetStats(int kinds) { 1642 GetStats()->Clear(kinds & 0xffff); 1643 // TODO: wouldn't it make more sense to clear _all_ threads' stats? 1644 Thread::Current()->GetStats()->Clear(kinds >> 16); 1645 } 1646 1647 int32_t Runtime::GetStat(int kind) { 1648 RuntimeStats* stats; 1649 if (kind < (1<<16)) { 1650 stats = GetStats(); 1651 } else { 1652 stats = Thread::Current()->GetStats(); 1653 kind >>= 16; 1654 } 1655 switch (kind) { 1656 case KIND_ALLOCATED_OBJECTS: 1657 return stats->allocated_objects; 1658 case KIND_ALLOCATED_BYTES: 1659 return stats->allocated_bytes; 1660 case KIND_FREED_OBJECTS: 1661 return stats->freed_objects; 1662 case KIND_FREED_BYTES: 1663 return stats->freed_bytes; 1664 case KIND_GC_INVOCATIONS: 1665 return stats->gc_for_alloc_count; 1666 case KIND_CLASS_INIT_COUNT: 1667 return stats->class_init_count; 1668 case KIND_CLASS_INIT_TIME: 1669 // Convert ns to us, reduce to 32 bits. 1670 return static_cast<int>(stats->class_init_time_ns / 1000); 1671 case KIND_EXT_ALLOCATED_OBJECTS: 1672 case KIND_EXT_ALLOCATED_BYTES: 1673 case KIND_EXT_FREED_OBJECTS: 1674 case KIND_EXT_FREED_BYTES: 1675 return 0; // backward compatibility 1676 default: 1677 LOG(FATAL) << "Unknown statistic " << kind; 1678 return -1; // unreachable 1679 } 1680 } 1681 1682 void Runtime::BlockSignals() { 1683 SignalSet signals; 1684 signals.Add(SIGPIPE); 1685 // SIGQUIT is used to dump the runtime's state (including stack traces). 1686 signals.Add(SIGQUIT); 1687 // SIGUSR1 is used to initiate a GC. 1688 signals.Add(SIGUSR1); 1689 signals.Block(); 1690 } 1691 1692 bool Runtime::AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group, 1693 bool create_peer) { 1694 ScopedTrace trace(__FUNCTION__); 1695 return Thread::Attach(thread_name, as_daemon, thread_group, create_peer) != nullptr; 1696 } 1697 1698 void Runtime::DetachCurrentThread() { 1699 ScopedTrace trace(__FUNCTION__); 1700 Thread* self = Thread::Current(); 1701 if (self == nullptr) { 1702 LOG(FATAL) << "attempting to detach thread that is not attached"; 1703 } 1704 if (self->HasManagedStack()) { 1705 LOG(FATAL) << *Thread::Current() << " attempting to detach while still running code"; 1706 } 1707 thread_list_->Unregister(self); 1708 } 1709 1710 mirror::Throwable* Runtime::GetPreAllocatedOutOfMemoryError() { 1711 mirror::Throwable* oome = pre_allocated_OutOfMemoryError_.Read(); 1712 if (oome == nullptr) { 1713 LOG(ERROR) << "Failed to return pre-allocated OOME"; 1714 } 1715 return oome; 1716 } 1717 1718 mirror::Throwable* Runtime::GetPreAllocatedNoClassDefFoundError() { 1719 mirror::Throwable* ncdfe = pre_allocated_NoClassDefFoundError_.Read(); 1720 if (ncdfe == nullptr) { 1721 LOG(ERROR) << "Failed to return pre-allocated NoClassDefFoundError"; 1722 } 1723 return ncdfe; 1724 } 1725 1726 void Runtime::VisitConstantRoots(RootVisitor* visitor) { 1727 // Visit the classes held as static in mirror classes, these can be visited concurrently and only 1728 // need to be visited once per GC since they never change. 1729 mirror::Class::VisitRoots(visitor); 1730 mirror::Constructor::VisitRoots(visitor); 1731 mirror::Reference::VisitRoots(visitor); 1732 mirror::Method::VisitRoots(visitor); 1733 mirror::StackTraceElement::VisitRoots(visitor); 1734 mirror::String::VisitRoots(visitor); 1735 mirror::Throwable::VisitRoots(visitor); 1736 mirror::Field::VisitRoots(visitor); 1737 mirror::MethodType::VisitRoots(visitor); 1738 mirror::MethodHandleImpl::VisitRoots(visitor); 1739 mirror::MethodHandlesLookup::VisitRoots(visitor); 1740 mirror::EmulatedStackFrame::VisitRoots(visitor); 1741 mirror::ClassExt::VisitRoots(visitor); 1742 mirror::CallSite::VisitRoots(visitor); 1743 // Visit all the primitive array types classes. 1744 mirror::PrimitiveArray<uint8_t>::VisitRoots(visitor); // BooleanArray 1745 mirror::PrimitiveArray<int8_t>::VisitRoots(visitor); // ByteArray 1746 mirror::PrimitiveArray<uint16_t>::VisitRoots(visitor); // CharArray 1747 mirror::PrimitiveArray<double>::VisitRoots(visitor); // DoubleArray 1748 mirror::PrimitiveArray<float>::VisitRoots(visitor); // FloatArray 1749 mirror::PrimitiveArray<int32_t>::VisitRoots(visitor); // IntArray 1750 mirror::PrimitiveArray<int64_t>::VisitRoots(visitor); // LongArray 1751 mirror::PrimitiveArray<int16_t>::VisitRoots(visitor); // ShortArray 1752 // Visiting the roots of these ArtMethods is not currently required since all the GcRoots are 1753 // null. 1754 BufferedRootVisitor<16> buffered_visitor(visitor, RootInfo(kRootVMInternal)); 1755 const PointerSize pointer_size = GetClassLinker()->GetImagePointerSize(); 1756 if (HasResolutionMethod()) { 1757 resolution_method_->VisitRoots(buffered_visitor, pointer_size); 1758 } 1759 if (HasImtConflictMethod()) { 1760 imt_conflict_method_->VisitRoots(buffered_visitor, pointer_size); 1761 } 1762 if (imt_unimplemented_method_ != nullptr) { 1763 imt_unimplemented_method_->VisitRoots(buffered_visitor, pointer_size); 1764 } 1765 for (size_t i = 0; i < kLastCalleeSaveType; ++i) { 1766 auto* m = reinterpret_cast<ArtMethod*>(callee_save_methods_[i]); 1767 if (m != nullptr) { 1768 m->VisitRoots(buffered_visitor, pointer_size); 1769 } 1770 } 1771 } 1772 1773 void Runtime::VisitConcurrentRoots(RootVisitor* visitor, VisitRootFlags flags) { 1774 intern_table_->VisitRoots(visitor, flags); 1775 class_linker_->VisitRoots(visitor, flags); 1776 heap_->VisitAllocationRecords(visitor); 1777 if ((flags & kVisitRootFlagNewRoots) == 0) { 1778 // Guaranteed to have no new roots in the constant roots. 1779 VisitConstantRoots(visitor); 1780 } 1781 Dbg::VisitRoots(visitor); 1782 } 1783 1784 void Runtime::VisitTransactionRoots(RootVisitor* visitor) { 1785 if (preinitialization_transaction_ != nullptr) { 1786 preinitialization_transaction_->VisitRoots(visitor); 1787 } 1788 } 1789 1790 void Runtime::VisitNonThreadRoots(RootVisitor* visitor) { 1791 java_vm_->VisitRoots(visitor); 1792 sentinel_.VisitRootIfNonNull(visitor, RootInfo(kRootVMInternal)); 1793 pre_allocated_OutOfMemoryError_.VisitRootIfNonNull(visitor, RootInfo(kRootVMInternal)); 1794 pre_allocated_NoClassDefFoundError_.VisitRootIfNonNull(visitor, RootInfo(kRootVMInternal)); 1795 verifier::MethodVerifier::VisitStaticRoots(visitor); 1796 VisitTransactionRoots(visitor); 1797 } 1798 1799 void Runtime::VisitNonConcurrentRoots(RootVisitor* visitor, VisitRootFlags flags) { 1800 VisitThreadRoots(visitor, flags); 1801 VisitNonThreadRoots(visitor); 1802 } 1803 1804 void Runtime::VisitThreadRoots(RootVisitor* visitor, VisitRootFlags flags) { 1805 thread_list_->VisitRoots(visitor, flags); 1806 } 1807 1808 size_t Runtime::FlipThreadRoots(Closure* thread_flip_visitor, Closure* flip_callback, 1809 gc::collector::GarbageCollector* collector) { 1810 return thread_list_->FlipThreadRoots(thread_flip_visitor, flip_callback, collector); 1811 } 1812 1813 void Runtime::VisitRoots(RootVisitor* visitor, VisitRootFlags flags) { 1814 VisitNonConcurrentRoots(visitor, flags); 1815 VisitConcurrentRoots(visitor, flags); 1816 } 1817 1818 void Runtime::VisitImageRoots(RootVisitor* visitor) { 1819 for (auto* space : GetHeap()->GetContinuousSpaces()) { 1820 if (space->IsImageSpace()) { 1821 auto* image_space = space->AsImageSpace(); 1822 const auto& image_header = image_space->GetImageHeader(); 1823 for (int32_t i = 0, size = image_header.GetImageRoots()->GetLength(); i != size; ++i) { 1824 auto* obj = image_header.GetImageRoot(static_cast<ImageHeader::ImageRoot>(i)); 1825 if (obj != nullptr) { 1826 auto* after_obj = obj; 1827 visitor->VisitRoot(&after_obj, RootInfo(kRootStickyClass)); 1828 CHECK_EQ(after_obj, obj); 1829 } 1830 } 1831 } 1832 } 1833 } 1834 1835 static ArtMethod* CreateRuntimeMethod(ClassLinker* class_linker, LinearAlloc* linear_alloc) { 1836 const PointerSize image_pointer_size = class_linker->GetImagePointerSize(); 1837 const size_t method_alignment = ArtMethod::Alignment(image_pointer_size); 1838 const size_t method_size = ArtMethod::Size(image_pointer_size); 1839 LengthPrefixedArray<ArtMethod>* method_array = class_linker->AllocArtMethodArray( 1840 Thread::Current(), 1841 linear_alloc, 1842 1); 1843 ArtMethod* method = &method_array->At(0, method_size, method_alignment); 1844 CHECK(method != nullptr); 1845 method->SetDexMethodIndex(DexFile::kDexNoIndex); 1846 CHECK(method->IsRuntimeMethod()); 1847 return method; 1848 } 1849 1850 ArtMethod* Runtime::CreateImtConflictMethod(LinearAlloc* linear_alloc) { 1851 ClassLinker* const class_linker = GetClassLinker(); 1852 ArtMethod* method = CreateRuntimeMethod(class_linker, linear_alloc); 1853 // When compiling, the code pointer will get set later when the image is loaded. 1854 const PointerSize pointer_size = GetInstructionSetPointerSize(instruction_set_); 1855 if (IsAotCompiler()) { 1856 method->SetEntryPointFromQuickCompiledCodePtrSize(nullptr, pointer_size); 1857 } else { 1858 method->SetEntryPointFromQuickCompiledCode(GetQuickImtConflictStub()); 1859 } 1860 // Create empty conflict table. 1861 method->SetImtConflictTable(class_linker->CreateImtConflictTable(/*count*/0u, linear_alloc), 1862 pointer_size); 1863 return method; 1864 } 1865 1866 void Runtime::SetImtConflictMethod(ArtMethod* method) { 1867 CHECK(method != nullptr); 1868 CHECK(method->IsRuntimeMethod()); 1869 imt_conflict_method_ = method; 1870 } 1871 1872 ArtMethod* Runtime::CreateResolutionMethod() { 1873 auto* method = CreateRuntimeMethod(GetClassLinker(), GetLinearAlloc()); 1874 // When compiling, the code pointer will get set later when the image is loaded. 1875 if (IsAotCompiler()) { 1876 PointerSize pointer_size = GetInstructionSetPointerSize(instruction_set_); 1877 method->SetEntryPointFromQuickCompiledCodePtrSize(nullptr, pointer_size); 1878 } else { 1879 method->SetEntryPointFromQuickCompiledCode(GetQuickResolutionStub()); 1880 } 1881 return method; 1882 } 1883 1884 ArtMethod* Runtime::CreateCalleeSaveMethod() { 1885 auto* method = CreateRuntimeMethod(GetClassLinker(), GetLinearAlloc()); 1886 PointerSize pointer_size = GetInstructionSetPointerSize(instruction_set_); 1887 method->SetEntryPointFromQuickCompiledCodePtrSize(nullptr, pointer_size); 1888 DCHECK_NE(instruction_set_, kNone); 1889 DCHECK(method->IsRuntimeMethod()); 1890 return method; 1891 } 1892 1893 void Runtime::DisallowNewSystemWeaks() { 1894 CHECK(!kUseReadBarrier); 1895 monitor_list_->DisallowNewMonitors(); 1896 intern_table_->ChangeWeakRootState(gc::kWeakRootStateNoReadsOrWrites); 1897 java_vm_->DisallowNewWeakGlobals(); 1898 heap_->DisallowNewAllocationRecords(); 1899 if (GetJit() != nullptr) { 1900 GetJit()->GetCodeCache()->DisallowInlineCacheAccess(); 1901 } 1902 1903 // All other generic system-weak holders. 1904 for (gc::AbstractSystemWeakHolder* holder : system_weak_holders_) { 1905 holder->Disallow(); 1906 } 1907 } 1908 1909 void Runtime::AllowNewSystemWeaks() { 1910 CHECK(!kUseReadBarrier); 1911 monitor_list_->AllowNewMonitors(); 1912 intern_table_->ChangeWeakRootState(gc::kWeakRootStateNormal); // TODO: Do this in the sweeping. 1913 java_vm_->AllowNewWeakGlobals(); 1914 heap_->AllowNewAllocationRecords(); 1915 if (GetJit() != nullptr) { 1916 GetJit()->GetCodeCache()->AllowInlineCacheAccess(); 1917 } 1918 1919 // All other generic system-weak holders. 1920 for (gc::AbstractSystemWeakHolder* holder : system_weak_holders_) { 1921 holder->Allow(); 1922 } 1923 } 1924 1925 void Runtime::BroadcastForNewSystemWeaks(bool broadcast_for_checkpoint) { 1926 // This is used for the read barrier case that uses the thread-local 1927 // Thread::GetWeakRefAccessEnabled() flag and the checkpoint while weak ref access is disabled 1928 // (see ThreadList::RunCheckpoint). 1929 monitor_list_->BroadcastForNewMonitors(); 1930 intern_table_->BroadcastForNewInterns(); 1931 java_vm_->BroadcastForNewWeakGlobals(); 1932 heap_->BroadcastForNewAllocationRecords(); 1933 if (GetJit() != nullptr) { 1934 GetJit()->GetCodeCache()->BroadcastForInlineCacheAccess(); 1935 } 1936 1937 // All other generic system-weak holders. 1938 for (gc::AbstractSystemWeakHolder* holder : system_weak_holders_) { 1939 holder->Broadcast(broadcast_for_checkpoint); 1940 } 1941 } 1942 1943 void Runtime::SetInstructionSet(InstructionSet instruction_set) { 1944 instruction_set_ = instruction_set; 1945 if ((instruction_set_ == kThumb2) || (instruction_set_ == kArm)) { 1946 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1947 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1948 callee_save_method_frame_infos_[i] = arm::ArmCalleeSaveMethodFrameInfo(type); 1949 } 1950 } else if (instruction_set_ == kMips) { 1951 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1952 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1953 callee_save_method_frame_infos_[i] = mips::MipsCalleeSaveMethodFrameInfo(type); 1954 } 1955 } else if (instruction_set_ == kMips64) { 1956 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1957 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1958 callee_save_method_frame_infos_[i] = mips64::Mips64CalleeSaveMethodFrameInfo(type); 1959 } 1960 } else if (instruction_set_ == kX86) { 1961 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1962 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1963 callee_save_method_frame_infos_[i] = x86::X86CalleeSaveMethodFrameInfo(type); 1964 } 1965 } else if (instruction_set_ == kX86_64) { 1966 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1967 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1968 callee_save_method_frame_infos_[i] = x86_64::X86_64CalleeSaveMethodFrameInfo(type); 1969 } 1970 } else if (instruction_set_ == kArm64) { 1971 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1972 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1973 callee_save_method_frame_infos_[i] = arm64::Arm64CalleeSaveMethodFrameInfo(type); 1974 } 1975 } else { 1976 UNIMPLEMENTED(FATAL) << instruction_set_; 1977 } 1978 } 1979 1980 void Runtime::ClearInstructionSet() { 1981 instruction_set_ = InstructionSet::kNone; 1982 } 1983 1984 void Runtime::SetCalleeSaveMethod(ArtMethod* method, CalleeSaveType type) { 1985 DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastCalleeSaveType)); 1986 CHECK(method != nullptr); 1987 callee_save_methods_[type] = reinterpret_cast<uintptr_t>(method); 1988 } 1989 1990 void Runtime::ClearCalleeSaveMethods() { 1991 for (size_t i = 0; i < static_cast<size_t>(kLastCalleeSaveType); ++i) { 1992 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1993 callee_save_methods_[type] = reinterpret_cast<uintptr_t>(nullptr); 1994 } 1995 } 1996 1997 void Runtime::RegisterAppInfo(const std::vector<std::string>& code_paths, 1998 const std::string& profile_output_filename) { 1999 if (jit_.get() == nullptr) { 2000 // We are not JITing. Nothing to do. 2001 return; 2002 } 2003 2004 VLOG(profiler) << "Register app with " << profile_output_filename 2005 << " " << android::base::Join(code_paths, ':'); 2006 2007 if (profile_output_filename.empty()) { 2008 LOG(WARNING) << "JIT profile information will not be recorded: profile filename is empty."; 2009 return; 2010 } 2011 if (!FileExists(profile_output_filename)) { 2012 LOG(WARNING) << "JIT profile information will not be recorded: profile file does not exits."; 2013 return; 2014 } 2015 if (code_paths.empty()) { 2016 LOG(WARNING) << "JIT profile information will not be recorded: code paths is empty."; 2017 return; 2018 } 2019 2020 jit_->StartProfileSaver(profile_output_filename, code_paths); 2021 } 2022 2023 // Transaction support. 2024 void Runtime::EnterTransactionMode(Transaction* transaction) { 2025 DCHECK(IsAotCompiler()); 2026 DCHECK(transaction != nullptr); 2027 DCHECK(!IsActiveTransaction()); 2028 preinitialization_transaction_ = transaction; 2029 } 2030 2031 void Runtime::ExitTransactionMode() { 2032 DCHECK(IsAotCompiler()); 2033 DCHECK(IsActiveTransaction()); 2034 preinitialization_transaction_ = nullptr; 2035 } 2036 2037 bool Runtime::IsTransactionAborted() const { 2038 if (!IsActiveTransaction()) { 2039 return false; 2040 } else { 2041 DCHECK(IsAotCompiler()); 2042 return preinitialization_transaction_->IsAborted(); 2043 } 2044 } 2045 2046 void Runtime::AbortTransactionAndThrowAbortError(Thread* self, const std::string& abort_message) { 2047 DCHECK(IsAotCompiler()); 2048 DCHECK(IsActiveTransaction()); 2049 // Throwing an exception may cause its class initialization. If we mark the transaction 2050 // aborted before that, we may warn with a false alarm. Throwing the exception before 2051 // marking the transaction aborted avoids that. 2052 preinitialization_transaction_->ThrowAbortError(self, &abort_message); 2053 preinitialization_transaction_->Abort(abort_message); 2054 } 2055 2056 void Runtime::ThrowTransactionAbortError(Thread* self) { 2057 DCHECK(IsAotCompiler()); 2058 DCHECK(IsActiveTransaction()); 2059 // Passing nullptr means we rethrow an exception with the earlier transaction abort message. 2060 preinitialization_transaction_->ThrowAbortError(self, nullptr); 2061 } 2062 2063 void Runtime::RecordWriteFieldBoolean(mirror::Object* obj, MemberOffset field_offset, 2064 uint8_t value, bool is_volatile) const { 2065 DCHECK(IsAotCompiler()); 2066 DCHECK(IsActiveTransaction()); 2067 preinitialization_transaction_->RecordWriteFieldBoolean(obj, field_offset, value, is_volatile); 2068 } 2069 2070 void Runtime::RecordWriteFieldByte(mirror::Object* obj, MemberOffset field_offset, 2071 int8_t value, bool is_volatile) const { 2072 DCHECK(IsAotCompiler()); 2073 DCHECK(IsActiveTransaction()); 2074 preinitialization_transaction_->RecordWriteFieldByte(obj, field_offset, value, is_volatile); 2075 } 2076 2077 void Runtime::RecordWriteFieldChar(mirror::Object* obj, MemberOffset field_offset, 2078 uint16_t value, bool is_volatile) const { 2079 DCHECK(IsAotCompiler()); 2080 DCHECK(IsActiveTransaction()); 2081 preinitialization_transaction_->RecordWriteFieldChar(obj, field_offset, value, is_volatile); 2082 } 2083 2084 void Runtime::RecordWriteFieldShort(mirror::Object* obj, MemberOffset field_offset, 2085 int16_t value, bool is_volatile) const { 2086 DCHECK(IsAotCompiler()); 2087 DCHECK(IsActiveTransaction()); 2088 preinitialization_transaction_->RecordWriteFieldShort(obj, field_offset, value, is_volatile); 2089 } 2090 2091 void Runtime::RecordWriteField32(mirror::Object* obj, MemberOffset field_offset, 2092 uint32_t value, bool is_volatile) const { 2093 DCHECK(IsAotCompiler()); 2094 DCHECK(IsActiveTransaction()); 2095 preinitialization_transaction_->RecordWriteField32(obj, field_offset, value, is_volatile); 2096 } 2097 2098 void Runtime::RecordWriteField64(mirror::Object* obj, MemberOffset field_offset, 2099 uint64_t value, bool is_volatile) const { 2100 DCHECK(IsAotCompiler()); 2101 DCHECK(IsActiveTransaction()); 2102 preinitialization_transaction_->RecordWriteField64(obj, field_offset, value, is_volatile); 2103 } 2104 2105 void Runtime::RecordWriteFieldReference(mirror::Object* obj, 2106 MemberOffset field_offset, 2107 ObjPtr<mirror::Object> value, 2108 bool is_volatile) const { 2109 DCHECK(IsAotCompiler()); 2110 DCHECK(IsActiveTransaction()); 2111 preinitialization_transaction_->RecordWriteFieldReference(obj, 2112 field_offset, 2113 value.Ptr(), 2114 is_volatile); 2115 } 2116 2117 void Runtime::RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const { 2118 DCHECK(IsAotCompiler()); 2119 DCHECK(IsActiveTransaction()); 2120 preinitialization_transaction_->RecordWriteArray(array, index, value); 2121 } 2122 2123 void Runtime::RecordStrongStringInsertion(ObjPtr<mirror::String> s) const { 2124 DCHECK(IsAotCompiler()); 2125 DCHECK(IsActiveTransaction()); 2126 preinitialization_transaction_->RecordStrongStringInsertion(s); 2127 } 2128 2129 void Runtime::RecordWeakStringInsertion(ObjPtr<mirror::String> s) const { 2130 DCHECK(IsAotCompiler()); 2131 DCHECK(IsActiveTransaction()); 2132 preinitialization_transaction_->RecordWeakStringInsertion(s); 2133 } 2134 2135 void Runtime::RecordStrongStringRemoval(ObjPtr<mirror::String> s) const { 2136 DCHECK(IsAotCompiler()); 2137 DCHECK(IsActiveTransaction()); 2138 preinitialization_transaction_->RecordStrongStringRemoval(s); 2139 } 2140 2141 void Runtime::RecordWeakStringRemoval(ObjPtr<mirror::String> s) const { 2142 DCHECK(IsAotCompiler()); 2143 DCHECK(IsActiveTransaction()); 2144 preinitialization_transaction_->RecordWeakStringRemoval(s); 2145 } 2146 2147 void Runtime::RecordResolveString(ObjPtr<mirror::DexCache> dex_cache, 2148 dex::StringIndex string_idx) const { 2149 DCHECK(IsAotCompiler()); 2150 DCHECK(IsActiveTransaction()); 2151 preinitialization_transaction_->RecordResolveString(dex_cache, string_idx); 2152 } 2153 2154 void Runtime::SetFaultMessage(const std::string& message) { 2155 MutexLock mu(Thread::Current(), fault_message_lock_); 2156 fault_message_ = message; 2157 } 2158 2159 void Runtime::AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* argv) 2160 const { 2161 if (GetInstrumentation()->InterpretOnly()) { 2162 argv->push_back("--compiler-filter=quicken"); 2163 } 2164 2165 // Make the dex2oat instruction set match that of the launching runtime. If we have multiple 2166 // architecture support, dex2oat may be compiled as a different instruction-set than that 2167 // currently being executed. 2168 std::string instruction_set("--instruction-set="); 2169 instruction_set += GetInstructionSetString(kRuntimeISA); 2170 argv->push_back(instruction_set); 2171 2172 std::unique_ptr<const InstructionSetFeatures> features(InstructionSetFeatures::FromCppDefines()); 2173 std::string feature_string("--instruction-set-features="); 2174 feature_string += features->GetFeatureString(); 2175 argv->push_back(feature_string); 2176 } 2177 2178 void Runtime::CreateJit() { 2179 CHECK(!IsAotCompiler()); 2180 if (kIsDebugBuild && GetInstrumentation()->IsForcedInterpretOnly()) { 2181 DCHECK(!jit_options_->UseJitCompilation()); 2182 } 2183 std::string error_msg; 2184 jit_.reset(jit::Jit::Create(jit_options_.get(), &error_msg)); 2185 if (jit_.get() == nullptr) { 2186 LOG(WARNING) << "Failed to create JIT " << error_msg; 2187 return; 2188 } 2189 2190 // In case we have a profile path passed as a command line argument, 2191 // register the current class path for profiling now. Note that we cannot do 2192 // this before we create the JIT and having it here is the most convenient way. 2193 // This is used when testing profiles with dalvikvm command as there is no 2194 // framework to register the dex files for profiling. 2195 if (jit_options_->GetSaveProfilingInfo() && 2196 !jit_options_->GetProfileSaverOptions().GetProfilePath().empty()) { 2197 std::vector<std::string> dex_filenames; 2198 Split(class_path_string_, ':', &dex_filenames); 2199 RegisterAppInfo(dex_filenames, jit_options_->GetProfileSaverOptions().GetProfilePath()); 2200 } 2201 } 2202 2203 bool Runtime::CanRelocate() const { 2204 return !IsAotCompiler() || compiler_callbacks_->IsRelocationPossible(); 2205 } 2206 2207 bool Runtime::IsCompilingBootImage() const { 2208 return IsCompiler() && compiler_callbacks_->IsBootImage(); 2209 } 2210 2211 void Runtime::SetResolutionMethod(ArtMethod* method) { 2212 CHECK(method != nullptr); 2213 CHECK(method->IsRuntimeMethod()) << method; 2214 resolution_method_ = method; 2215 } 2216 2217 void Runtime::SetImtUnimplementedMethod(ArtMethod* method) { 2218 CHECK(method != nullptr); 2219 CHECK(method->IsRuntimeMethod()); 2220 imt_unimplemented_method_ = method; 2221 } 2222 2223 void Runtime::FixupConflictTables() { 2224 // We can only do this after the class linker is created. 2225 const PointerSize pointer_size = GetClassLinker()->GetImagePointerSize(); 2226 if (imt_unimplemented_method_->GetImtConflictTable(pointer_size) == nullptr) { 2227 imt_unimplemented_method_->SetImtConflictTable( 2228 ClassLinker::CreateImtConflictTable(/*count*/0u, GetLinearAlloc(), pointer_size), 2229 pointer_size); 2230 } 2231 if (imt_conflict_method_->GetImtConflictTable(pointer_size) == nullptr) { 2232 imt_conflict_method_->SetImtConflictTable( 2233 ClassLinker::CreateImtConflictTable(/*count*/0u, GetLinearAlloc(), pointer_size), 2234 pointer_size); 2235 } 2236 } 2237 2238 bool Runtime::IsVerificationEnabled() const { 2239 return verify_ == verifier::VerifyMode::kEnable || 2240 verify_ == verifier::VerifyMode::kSoftFail; 2241 } 2242 2243 bool Runtime::IsVerificationSoftFail() const { 2244 return verify_ == verifier::VerifyMode::kSoftFail; 2245 } 2246 2247 bool Runtime::IsAsyncDeoptimizeable(uintptr_t code) const { 2248 // We only support async deopt (ie the compiled code is not explicitly asking for 2249 // deopt, but something else like the debugger) in debuggable JIT code. 2250 // We could look at the oat file where `code` is being defined, 2251 // and check whether it's been compiled debuggable, but we decided to 2252 // only rely on the JIT for debuggable apps. 2253 return IsJavaDebuggable() && 2254 GetJit() != nullptr && 2255 GetJit()->GetCodeCache()->ContainsPc(reinterpret_cast<const void*>(code)); 2256 } 2257 2258 LinearAlloc* Runtime::CreateLinearAlloc() { 2259 // For 64 bit compilers, it needs to be in low 4GB in the case where we are cross compiling for a 2260 // 32 bit target. In this case, we have 32 bit pointers in the dex cache arrays which can't hold 2261 // when we have 64 bit ArtMethod pointers. 2262 return (IsAotCompiler() && Is64BitInstructionSet(kRuntimeISA)) 2263 ? new LinearAlloc(low_4gb_arena_pool_.get()) 2264 : new LinearAlloc(arena_pool_.get()); 2265 } 2266 2267 double Runtime::GetHashTableMinLoadFactor() const { 2268 return is_low_memory_mode_ ? kLowMemoryMinLoadFactor : kNormalMinLoadFactor; 2269 } 2270 2271 double Runtime::GetHashTableMaxLoadFactor() const { 2272 return is_low_memory_mode_ ? kLowMemoryMaxLoadFactor : kNormalMaxLoadFactor; 2273 } 2274 2275 void Runtime::UpdateProcessState(ProcessState process_state) { 2276 ProcessState old_process_state = process_state_; 2277 process_state_ = process_state; 2278 GetHeap()->UpdateProcessState(old_process_state, process_state); 2279 } 2280 2281 void Runtime::RegisterSensitiveThread() const { 2282 Thread::SetJitSensitiveThread(); 2283 } 2284 2285 // Returns true if JIT compilations are enabled. GetJit() will be not null in this case. 2286 bool Runtime::UseJitCompilation() const { 2287 return (jit_ != nullptr) && jit_->UseJitCompilation(); 2288 } 2289 2290 void Runtime::EnvSnapshot::TakeSnapshot() { 2291 char** env = GetEnviron(); 2292 for (size_t i = 0; env[i] != nullptr; ++i) { 2293 name_value_pairs_.emplace_back(new std::string(env[i])); 2294 } 2295 // The strings in name_value_pairs_ retain ownership of the c_str, but we assign pointers 2296 // for quick use by GetSnapshot. This avoids allocation and copying cost at Exec. 2297 c_env_vector_.reset(new char*[name_value_pairs_.size() + 1]); 2298 for (size_t i = 0; env[i] != nullptr; ++i) { 2299 c_env_vector_[i] = const_cast<char*>(name_value_pairs_[i]->c_str()); 2300 } 2301 c_env_vector_[name_value_pairs_.size()] = nullptr; 2302 } 2303 2304 char** Runtime::EnvSnapshot::GetSnapshot() const { 2305 return c_env_vector_.get(); 2306 } 2307 2308 void Runtime::AddSystemWeakHolder(gc::AbstractSystemWeakHolder* holder) { 2309 gc::ScopedGCCriticalSection gcs(Thread::Current(), 2310 gc::kGcCauseAddRemoveSystemWeakHolder, 2311 gc::kCollectorTypeAddRemoveSystemWeakHolder); 2312 // Note: The ScopedGCCriticalSection also ensures that the rest of the function is in 2313 // a critical section. 2314 system_weak_holders_.push_back(holder); 2315 } 2316 2317 void Runtime::RemoveSystemWeakHolder(gc::AbstractSystemWeakHolder* holder) { 2318 gc::ScopedGCCriticalSection gcs(Thread::Current(), 2319 gc::kGcCauseAddRemoveSystemWeakHolder, 2320 gc::kCollectorTypeAddRemoveSystemWeakHolder); 2321 auto it = std::find(system_weak_holders_.begin(), system_weak_holders_.end(), holder); 2322 if (it != system_weak_holders_.end()) { 2323 system_weak_holders_.erase(it); 2324 } 2325 } 2326 2327 NO_RETURN 2328 void Runtime::Aborter(const char* abort_message) { 2329 #ifdef ART_TARGET_ANDROID 2330 android_set_abort_message(abort_message); 2331 #endif 2332 Runtime::Abort(abort_message); 2333 } 2334 2335 RuntimeCallbacks* Runtime::GetRuntimeCallbacks() { 2336 return callbacks_.get(); 2337 } 2338 2339 // Used to patch boot image method entry point to interpreter bridge. 2340 class UpdateEntryPointsClassVisitor : public ClassVisitor { 2341 public: 2342 explicit UpdateEntryPointsClassVisitor(instrumentation::Instrumentation* instrumentation) 2343 : instrumentation_(instrumentation) {} 2344 2345 bool operator()(ObjPtr<mirror::Class> klass) OVERRIDE REQUIRES(Locks::mutator_lock_) { 2346 auto pointer_size = Runtime::Current()->GetClassLinker()->GetImagePointerSize(); 2347 for (auto& m : klass->GetMethods(pointer_size)) { 2348 const void* code = m.GetEntryPointFromQuickCompiledCode(); 2349 if (Runtime::Current()->GetHeap()->IsInBootImageOatFile(code) && 2350 !m.IsNative() && 2351 !m.IsProxyMethod()) { 2352 instrumentation_->UpdateMethodsCodeForJavaDebuggable(&m, GetQuickToInterpreterBridge()); 2353 } 2354 } 2355 return true; 2356 } 2357 2358 private: 2359 instrumentation::Instrumentation* const instrumentation_; 2360 }; 2361 2362 void Runtime::SetJavaDebuggable(bool value) { 2363 is_java_debuggable_ = value; 2364 // Do not call DeoptimizeBootImage just yet, the runtime may still be starting up. 2365 } 2366 2367 void Runtime::DeoptimizeBootImage() { 2368 // If we've already started and we are setting this runtime to debuggable, 2369 // we patch entry points of methods in boot image to interpreter bridge, as 2370 // boot image code may be AOT compiled as not debuggable. 2371 if (!GetInstrumentation()->IsForcedInterpretOnly()) { 2372 ScopedObjectAccess soa(Thread::Current()); 2373 UpdateEntryPointsClassVisitor visitor(GetInstrumentation()); 2374 GetClassLinker()->VisitClasses(&visitor); 2375 } 2376 } 2377 2378 } // namespace art 2379