runtime.cc revision e58991b3b2282b5761f1a6023a16c803e1c4eb45
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#define ATRACE_TAG ATRACE_TAG_DALVIK 27#include <cutils/trace.h> 28#include <signal.h> 29#include <sys/syscall.h> 30#include "base/memory_tool.h" 31 32#include <cstdio> 33#include <cstdlib> 34#include <limits> 35#include <memory_representation.h> 36#include <vector> 37#include <fcntl.h> 38 39#include "JniConstants.h" 40#include "ScopedLocalRef.h" 41#include "arch/arm/quick_method_frame_info_arm.h" 42#include "arch/arm/registers_arm.h" 43#include "arch/arm64/quick_method_frame_info_arm64.h" 44#include "arch/arm64/registers_arm64.h" 45#include "arch/instruction_set_features.h" 46#include "arch/mips/quick_method_frame_info_mips.h" 47#include "arch/mips/registers_mips.h" 48#include "arch/mips64/quick_method_frame_info_mips64.h" 49#include "arch/mips64/registers_mips64.h" 50#include "arch/x86/quick_method_frame_info_x86.h" 51#include "arch/x86/registers_x86.h" 52#include "arch/x86_64/quick_method_frame_info_x86_64.h" 53#include "arch/x86_64/registers_x86_64.h" 54#include "art_field-inl.h" 55#include "art_method-inl.h" 56#include "asm_support.h" 57#include "atomic.h" 58#include "base/arena_allocator.h" 59#include "base/dumpable.h" 60#include "base/stl_util.h" 61#include "base/unix_file/fd_file.h" 62#include "class_linker-inl.h" 63#include "compiler_callbacks.h" 64#include "debugger.h" 65#include "elf_file.h" 66#include "entrypoints/runtime_asm_entrypoints.h" 67#include "fault_handler.h" 68#include "gc/accounting/card_table-inl.h" 69#include "gc/heap.h" 70#include "gc/space/image_space.h" 71#include "gc/space/space-inl.h" 72#include "handle_scope-inl.h" 73#include "image.h" 74#include "instrumentation.h" 75#include "intern_table.h" 76#include "interpreter/interpreter.h" 77#include "jit/jit.h" 78#include "jni_internal.h" 79#include "linear_alloc.h" 80#include "lambda/box_table.h" 81#include "mirror/array.h" 82#include "mirror/class-inl.h" 83#include "mirror/class_loader.h" 84#include "mirror/field.h" 85#include "mirror/method.h" 86#include "mirror/stack_trace_element.h" 87#include "mirror/throwable.h" 88#include "monitor.h" 89#include "native/dalvik_system_DexFile.h" 90#include "native/dalvik_system_VMDebug.h" 91#include "native/dalvik_system_VMRuntime.h" 92#include "native/dalvik_system_VMStack.h" 93#include "native/dalvik_system_ZygoteHooks.h" 94#include "native/java_lang_Class.h" 95#include "native/java_lang_DexCache.h" 96#include "native/java_lang_Object.h" 97#include "native/java_lang_Runtime.h" 98#include "native/java_lang_String.h" 99#include "native/java_lang_StringFactory.h" 100#include "native/java_lang_System.h" 101#include "native/java_lang_Thread.h" 102#include "native/java_lang_Throwable.h" 103#include "native/java_lang_VMClassLoader.h" 104#include "native/java_lang_ref_FinalizerReference.h" 105#include "native/java_lang_ref_Reference.h" 106#include "native/java_lang_reflect_Array.h" 107#include "native/java_lang_reflect_Constructor.h" 108#include "native/java_lang_reflect_Field.h" 109#include "native/java_lang_reflect_Method.h" 110#include "native/java_lang_reflect_Proxy.h" 111#include "native/java_util_concurrent_atomic_AtomicLong.h" 112#include "native/libcore_util_CharsetUtils.h" 113#include "native/org_apache_harmony_dalvik_ddmc_DdmServer.h" 114#include "native/org_apache_harmony_dalvik_ddmc_DdmVmInternal.h" 115#include "native/sun_misc_Unsafe.h" 116#include "native_bridge_art_interface.h" 117#include "oat_file.h" 118#include "oat_file_manager.h" 119#include "os.h" 120#include "parsed_options.h" 121#include "profiler.h" 122#include "quick/quick_method_frame_info.h" 123#include "reflection.h" 124#include "runtime_options.h" 125#include "ScopedLocalRef.h" 126#include "scoped_thread_state_change.h" 127#include "sigchain.h" 128#include "signal_catcher.h" 129#include "signal_set.h" 130#include "thread.h" 131#include "thread_list.h" 132#include "trace.h" 133#include "transaction.h" 134#include "utils.h" 135#include "verifier/method_verifier.h" 136#include "well_known_classes.h" 137 138namespace art { 139 140// If a signal isn't handled properly, enable a handler that attempts to dump the Java stack. 141static constexpr bool kEnableJavaStackTraceHandler = false; 142Runtime* Runtime::instance_ = nullptr; 143 144struct TraceConfig { 145 Trace::TraceMode trace_mode; 146 Trace::TraceOutputMode trace_output_mode; 147 std::string trace_file; 148 size_t trace_file_size; 149}; 150 151Runtime::Runtime() 152 : resolution_method_(nullptr), 153 imt_conflict_method_(nullptr), 154 imt_unimplemented_method_(nullptr), 155 instruction_set_(kNone), 156 compiler_callbacks_(nullptr), 157 is_zygote_(false), 158 must_relocate_(false), 159 is_concurrent_gc_enabled_(true), 160 is_explicit_gc_disabled_(false), 161 dex2oat_enabled_(true), 162 image_dex2oat_enabled_(true), 163 default_stack_size_(0), 164 heap_(nullptr), 165 max_spins_before_thin_lock_inflation_(Monitor::kDefaultMaxSpinsBeforeThinLockInflation), 166 monitor_list_(nullptr), 167 monitor_pool_(nullptr), 168 thread_list_(nullptr), 169 intern_table_(nullptr), 170 class_linker_(nullptr), 171 signal_catcher_(nullptr), 172 java_vm_(nullptr), 173 fault_message_lock_("Fault message lock"), 174 fault_message_(""), 175 threads_being_born_(0), 176 shutdown_cond_(new ConditionVariable("Runtime shutdown", *Locks::runtime_shutdown_lock_)), 177 shutting_down_(false), 178 shutting_down_started_(false), 179 started_(false), 180 finished_starting_(false), 181 vfprintf_(nullptr), 182 exit_(nullptr), 183 abort_(nullptr), 184 stats_enabled_(false), 185 is_running_on_memory_tool_(RUNNING_ON_MEMORY_TOOL), 186 profiler_started_(false), 187 instrumentation_(), 188 main_thread_group_(nullptr), 189 system_thread_group_(nullptr), 190 system_class_loader_(nullptr), 191 dump_gc_performance_on_shutdown_(false), 192 preinitialization_transaction_(nullptr), 193 verify_(verifier::VerifyMode::kNone), 194 allow_dex_file_fallback_(true), 195 target_sdk_version_(0), 196 implicit_null_checks_(false), 197 implicit_so_checks_(false), 198 implicit_suspend_checks_(false), 199 no_sig_chain_(false), 200 is_native_bridge_loaded_(false), 201 zygote_max_failed_boots_(0), 202 experimental_lambdas_(false) { 203 CheckAsmSupportOffsetsAndSizes(); 204 std::fill(callee_save_methods_, callee_save_methods_ + arraysize(callee_save_methods_), 0u); 205} 206 207Runtime::~Runtime() { 208 if (is_native_bridge_loaded_) { 209 UnloadNativeBridge(); 210 } 211 if (dump_gc_performance_on_shutdown_) { 212 // This can't be called from the Heap destructor below because it 213 // could call RosAlloc::InspectAll() which needs the thread_list 214 // to be still alive. 215 heap_->DumpGcPerformanceInfo(LOG(INFO)); 216 } 217 218 Thread* self = Thread::Current(); 219 const bool attach_shutdown_thread = self == nullptr; 220 if (attach_shutdown_thread) { 221 CHECK(AttachCurrentThread("Shutdown thread", false, nullptr, false)); 222 self = Thread::Current(); 223 } else { 224 LOG(WARNING) << "Current thread not detached in Runtime shutdown"; 225 } 226 227 { 228 MutexLock mu(self, *Locks::runtime_shutdown_lock_); 229 shutting_down_started_ = true; 230 while (threads_being_born_ > 0) { 231 shutdown_cond_->Wait(self); 232 } 233 shutting_down_ = true; 234 } 235 // Shutdown and wait for the daemons. 236 CHECK(self != nullptr); 237 if (IsFinishedStarting()) { 238 self->ClearException(); 239 self->GetJniEnv()->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons, 240 WellKnownClasses::java_lang_Daemons_stop); 241 } 242 243 Trace::Shutdown(); 244 245 if (attach_shutdown_thread) { 246 DetachCurrentThread(); 247 self = nullptr; 248 } 249 250 // Shut down background profiler before the runtime exits. 251 if (profiler_started_) { 252 BackgroundMethodSamplingProfiler::Shutdown(); 253 } 254 255 // Make sure to let the GC complete if it is running. 256 heap_->WaitForGcToComplete(gc::kGcCauseBackground, self); 257 heap_->DeleteThreadPool(); 258 if (jit_.get() != nullptr) { 259 VLOG(jit) << "Deleting jit thread pool"; 260 // Delete thread pool before the thread list since we don't want to wait forever on the 261 // JIT compiler threads. 262 jit_->DeleteThreadPool(); 263 } 264 265 // Make sure our internal threads are dead before we start tearing down things they're using. 266 Dbg::StopJdwp(); 267 delete signal_catcher_; 268 269 // Make sure all other non-daemon threads have terminated, and all daemon threads are suspended. 270 delete thread_list_; 271 272 // Delete the JIT after thread list to ensure that there is no remaining threads which could be 273 // accessing the instrumentation when we delete it. 274 if (jit_.get() != nullptr) { 275 VLOG(jit) << "Deleting jit"; 276 jit_.reset(nullptr); 277 } 278 279 // Shutdown the fault manager if it was initialized. 280 fault_manager.Shutdown(); 281 282 delete monitor_list_; 283 delete monitor_pool_; 284 delete class_linker_; 285 delete heap_; 286 delete intern_table_; 287 delete java_vm_; 288 delete oat_file_manager_; 289 Thread::Shutdown(); 290 QuasiAtomic::Shutdown(); 291 verifier::MethodVerifier::Shutdown(); 292 293 // Destroy allocators before shutting down the MemMap because they may use it. 294 linear_alloc_.reset(); 295 low_4gb_arena_pool_.reset(); 296 arena_pool_.reset(); 297 MemMap::Shutdown(); 298 299 // TODO: acquire a static mutex on Runtime to avoid racing. 300 CHECK(instance_ == nullptr || instance_ == this); 301 instance_ = nullptr; 302} 303 304struct AbortState { 305 void Dump(std::ostream& os) const { 306 if (gAborting > 1) { 307 os << "Runtime aborting --- recursively, so no thread-specific detail!\n"; 308 return; 309 } 310 gAborting++; 311 os << "Runtime aborting...\n"; 312 if (Runtime::Current() == nullptr) { 313 os << "(Runtime does not yet exist!)\n"; 314 return; 315 } 316 Thread* self = Thread::Current(); 317 if (self == nullptr) { 318 os << "(Aborting thread was not attached to runtime!)\n"; 319 DumpKernelStack(os, GetTid(), " kernel: ", false); 320 DumpNativeStack(os, GetTid(), " native: ", nullptr); 321 } else { 322 os << "Aborting thread:\n"; 323 if (Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)) { 324 DumpThread(os, self); 325 } else { 326 if (Locks::mutator_lock_->SharedTryLock(self)) { 327 DumpThread(os, self); 328 Locks::mutator_lock_->SharedUnlock(self); 329 } 330 } 331 } 332 DumpAllThreads(os, self); 333 } 334 335 // No thread-safety analysis as we do explicitly test for holding the mutator lock. 336 void DumpThread(std::ostream& os, Thread* self) const NO_THREAD_SAFETY_ANALYSIS { 337 DCHECK(Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)); 338 self->Dump(os); 339 if (self->IsExceptionPending()) { 340 mirror::Throwable* exception = self->GetException(); 341 os << "Pending exception " << exception->Dump(); 342 } 343 } 344 345 void DumpAllThreads(std::ostream& os, Thread* self) const { 346 Runtime* runtime = Runtime::Current(); 347 if (runtime != nullptr) { 348 ThreadList* thread_list = runtime->GetThreadList(); 349 if (thread_list != nullptr) { 350 bool tll_already_held = Locks::thread_list_lock_->IsExclusiveHeld(self); 351 bool ml_already_held = Locks::mutator_lock_->IsSharedHeld(self); 352 if (!tll_already_held || !ml_already_held) { 353 os << "Dumping all threads without appropriate locks held:" 354 << (!tll_already_held ? " thread list lock" : "") 355 << (!ml_already_held ? " mutator lock" : "") 356 << "\n"; 357 } 358 os << "All threads:\n"; 359 thread_list->Dump(os); 360 } 361 } 362 } 363}; 364 365void Runtime::Abort() { 366 gAborting++; // set before taking any locks 367 368 // Ensure that we don't have multiple threads trying to abort at once, 369 // which would result in significantly worse diagnostics. 370 MutexLock mu(Thread::Current(), *Locks::abort_lock_); 371 372 // Get any pending output out of the way. 373 fflush(nullptr); 374 375 // Many people have difficulty distinguish aborts from crashes, 376 // so be explicit. 377 AbortState state; 378 LOG(INTERNAL_FATAL) << Dumpable<AbortState>(state); 379 380 // Call the abort hook if we have one. 381 if (Runtime::Current() != nullptr && Runtime::Current()->abort_ != nullptr) { 382 LOG(INTERNAL_FATAL) << "Calling abort hook..."; 383 Runtime::Current()->abort_(); 384 // notreached 385 LOG(INTERNAL_FATAL) << "Unexpectedly returned from abort hook!"; 386 } 387 388#if defined(__GLIBC__) 389 // TODO: we ought to be able to use pthread_kill(3) here (or abort(3), 390 // which POSIX defines in terms of raise(3), which POSIX defines in terms 391 // of pthread_kill(3)). On Linux, though, libcorkscrew can't unwind through 392 // libpthread, which means the stacks we dump would be useless. Calling 393 // tgkill(2) directly avoids that. 394 syscall(__NR_tgkill, getpid(), GetTid(), SIGABRT); 395 // TODO: LLVM installs it's own SIGABRT handler so exit to be safe... Can we disable that in LLVM? 396 // If not, we could use sigaction(3) before calling tgkill(2) and lose this call to exit(3). 397 exit(1); 398#else 399 abort(); 400#endif 401 // notreached 402} 403 404void Runtime::PreZygoteFork() { 405 heap_->PreZygoteFork(); 406} 407 408void Runtime::CallExitHook(jint status) { 409 if (exit_ != nullptr) { 410 ScopedThreadStateChange tsc(Thread::Current(), kNative); 411 exit_(status); 412 LOG(WARNING) << "Exit hook returned instead of exiting!"; 413 } 414} 415 416void Runtime::SweepSystemWeaks(IsMarkedVisitor* visitor) { 417 GetInternTable()->SweepInternTableWeaks(visitor); 418 GetMonitorList()->SweepMonitorList(visitor); 419 GetJavaVM()->SweepJniWeakGlobals(visitor); 420 GetHeap()->SweepAllocationRecords(visitor); 421 GetLambdaBoxTable()->SweepWeakBoxedLambdas(visitor); 422} 423 424bool Runtime::Create(const RuntimeOptions& options, bool ignore_unrecognized) { 425 // TODO: acquire a static mutex on Runtime to avoid racing. 426 if (Runtime::instance_ != nullptr) { 427 return false; 428 } 429 InitLogging(nullptr); // Calls Locks::Init() as a side effect. 430 instance_ = new Runtime; 431 if (!instance_->Init(options, ignore_unrecognized)) { 432 // TODO: Currently deleting the instance will abort the runtime on destruction. Now This will 433 // leak memory, instead. Fix the destructor. b/19100793. 434 // delete instance_; 435 instance_ = nullptr; 436 return false; 437 } 438 return true; 439} 440 441static jobject CreateSystemClassLoader(Runtime* runtime) { 442 if (runtime->IsAotCompiler() && !runtime->GetCompilerCallbacks()->IsBootImage()) { 443 return nullptr; 444 } 445 446 ScopedObjectAccess soa(Thread::Current()); 447 ClassLinker* cl = Runtime::Current()->GetClassLinker(); 448 auto pointer_size = cl->GetImagePointerSize(); 449 450 StackHandleScope<2> hs(soa.Self()); 451 Handle<mirror::Class> class_loader_class( 452 hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_ClassLoader))); 453 CHECK(cl->EnsureInitialized(soa.Self(), class_loader_class, true, true)); 454 455 ArtMethod* getSystemClassLoader = class_loader_class->FindDirectMethod( 456 "getSystemClassLoader", "()Ljava/lang/ClassLoader;", pointer_size); 457 CHECK(getSystemClassLoader != nullptr); 458 459 JValue result = InvokeWithJValues(soa, nullptr, soa.EncodeMethod(getSystemClassLoader), nullptr); 460 JNIEnv* env = soa.Self()->GetJniEnv(); 461 ScopedLocalRef<jobject> system_class_loader(env, soa.AddLocalReference<jobject>(result.GetL())); 462 CHECK(system_class_loader.get() != nullptr); 463 464 soa.Self()->SetClassLoaderOverride(system_class_loader.get()); 465 466 Handle<mirror::Class> thread_class( 467 hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_Thread))); 468 CHECK(cl->EnsureInitialized(soa.Self(), thread_class, true, true)); 469 470 ArtField* contextClassLoader = 471 thread_class->FindDeclaredInstanceField("contextClassLoader", "Ljava/lang/ClassLoader;"); 472 CHECK(contextClassLoader != nullptr); 473 474 // We can't run in a transaction yet. 475 contextClassLoader->SetObject<false>(soa.Self()->GetPeer(), 476 soa.Decode<mirror::ClassLoader*>(system_class_loader.get())); 477 478 return env->NewGlobalRef(system_class_loader.get()); 479} 480 481std::string Runtime::GetPatchoatExecutable() const { 482 if (!patchoat_executable_.empty()) { 483 return patchoat_executable_; 484 } 485 std::string patchoat_executable(GetAndroidRoot()); 486 patchoat_executable += (kIsDebugBuild ? "/bin/patchoatd" : "/bin/patchoat"); 487 return patchoat_executable; 488} 489 490std::string Runtime::GetCompilerExecutable() const { 491 if (!compiler_executable_.empty()) { 492 return compiler_executable_; 493 } 494 std::string compiler_executable(GetAndroidRoot()); 495 compiler_executable += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat"); 496 return compiler_executable; 497} 498 499bool Runtime::Start() { 500 VLOG(startup) << "Runtime::Start entering"; 501 502 CHECK(!no_sig_chain_) << "A started runtime should have sig chain enabled"; 503 504 // If a debug host build, disable ptrace restriction for debugging and test timeout thread dump. 505 // Only 64-bit as prctl() may fail in 32 bit userspace on a 64-bit kernel. 506#if defined(__linux__) && !defined(__ANDROID__) && defined(__x86_64__) 507 if (kIsDebugBuild) { 508 CHECK_EQ(prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY), 0); 509 } 510#endif 511 512 // Restore main thread state to kNative as expected by native code. 513 Thread* self = Thread::Current(); 514 515 self->TransitionFromRunnableToSuspended(kNative); 516 517 started_ = true; 518 519 // Use !IsAotCompiler so that we get test coverage, tests are never the zygote. 520 if (!IsAotCompiler()) { 521 ScopedObjectAccess soa(self); 522 gc::space::ImageSpace* image_space = heap_->GetImageSpace(); 523 if (image_space != nullptr) { 524 ATRACE_BEGIN("AddImageStringsToTable"); 525 GetInternTable()->AddImageStringsToTable(image_space); 526 ATRACE_END(); 527 ATRACE_BEGIN("MoveImageClassesToClassTable"); 528 GetClassLinker()->MoveImageClassesToClassTable(); 529 ATRACE_END(); 530 } 531 } 532 533 // If we are the zygote then we need to wait until after forking to create the code cache 534 // due to SELinux restrictions on r/w/x memory regions. 535 if (!IsZygote() && jit_options_->UseJIT()) { 536 CreateJit(); 537 } 538 539 if (!IsImageDex2OatEnabled() || !GetHeap()->HasImageSpace()) { 540 ScopedObjectAccess soa(self); 541 StackHandleScope<1> hs(soa.Self()); 542 auto klass(hs.NewHandle<mirror::Class>(mirror::Class::GetJavaLangClass())); 543 class_linker_->EnsureInitialized(soa.Self(), klass, true, true); 544 } 545 546 // InitNativeMethods needs to be after started_ so that the classes 547 // it touches will have methods linked to the oat file if necessary. 548 ATRACE_BEGIN("InitNativeMethods"); 549 InitNativeMethods(); 550 ATRACE_END(); 551 552 // Initialize well known thread group values that may be accessed threads while attaching. 553 InitThreadGroups(self); 554 555 Thread::FinishStartup(); 556 557 system_class_loader_ = CreateSystemClassLoader(this); 558 559 if (is_zygote_) { 560 if (!InitZygote()) { 561 return false; 562 } 563 } else { 564 if (is_native_bridge_loaded_) { 565 PreInitializeNativeBridge("."); 566 } 567 DidForkFromZygote(self->GetJniEnv(), NativeBridgeAction::kInitialize, 568 GetInstructionSetString(kRuntimeISA)); 569 } 570 571 ATRACE_BEGIN("StartDaemonThreads"); 572 StartDaemonThreads(); 573 ATRACE_END(); 574 575 { 576 ScopedObjectAccess soa(self); 577 self->GetJniEnv()->locals.AssertEmpty(); 578 } 579 580 VLOG(startup) << "Runtime::Start exiting"; 581 finished_starting_ = true; 582 583 if (profiler_options_.IsEnabled() && !profile_output_filename_.empty()) { 584 // User has asked for a profile using -Xenable-profiler. 585 // Create the profile file if it doesn't exist. 586 int fd = open(profile_output_filename_.c_str(), O_RDWR|O_CREAT|O_EXCL, 0660); 587 if (fd >= 0) { 588 close(fd); 589 } else if (errno != EEXIST) { 590 LOG(INFO) << "Failed to access the profile file. Profiler disabled."; 591 return true; 592 } 593 StartProfiler(profile_output_filename_.c_str()); 594 } 595 596 if (trace_config_.get() != nullptr && trace_config_->trace_file != "") { 597 ScopedThreadStateChange tsc(self, kWaitingForMethodTracingStart); 598 Trace::Start(trace_config_->trace_file.c_str(), 599 -1, 600 static_cast<int>(trace_config_->trace_file_size), 601 0, 602 trace_config_->trace_output_mode, 603 trace_config_->trace_mode, 604 0); 605 } 606 607 return true; 608} 609 610void Runtime::EndThreadBirth() REQUIRES(Locks::runtime_shutdown_lock_) { 611 DCHECK_GT(threads_being_born_, 0U); 612 threads_being_born_--; 613 if (shutting_down_started_ && threads_being_born_ == 0) { 614 shutdown_cond_->Broadcast(Thread::Current()); 615 } 616} 617 618// Do zygote-mode-only initialization. 619bool Runtime::InitZygote() { 620#ifdef __linux__ 621 // zygote goes into its own process group 622 setpgid(0, 0); 623 624 // See storage config details at http://source.android.com/tech/storage/ 625 // Create private mount namespace shared by all children 626 if (unshare(CLONE_NEWNS) == -1) { 627 PLOG(ERROR) << "Failed to unshare()"; 628 return false; 629 } 630 631 // Mark rootfs as being a slave so that changes from default 632 // namespace only flow into our children. 633 if (mount("rootfs", "/", nullptr, (MS_SLAVE | MS_REC), nullptr) == -1) { 634 PLOG(ERROR) << "Failed to mount() rootfs as MS_SLAVE"; 635 return false; 636 } 637 638 // Create a staging tmpfs that is shared by our children; they will 639 // bind mount storage into their respective private namespaces, which 640 // are isolated from each other. 641 const char* target_base = getenv("EMULATED_STORAGE_TARGET"); 642 if (target_base != nullptr) { 643 if (mount("tmpfs", target_base, "tmpfs", MS_NOSUID | MS_NODEV, 644 "uid=0,gid=1028,mode=0751") == -1) { 645 PLOG(ERROR) << "Failed to mount tmpfs to " << target_base; 646 return false; 647 } 648 } 649 650 return true; 651#else 652 UNIMPLEMENTED(FATAL); 653 return false; 654#endif 655} 656 657void Runtime::DidForkFromZygote(JNIEnv* env, NativeBridgeAction action, const char* isa) { 658 is_zygote_ = false; 659 660 if (is_native_bridge_loaded_) { 661 switch (action) { 662 case NativeBridgeAction::kUnload: 663 UnloadNativeBridge(); 664 is_native_bridge_loaded_ = false; 665 break; 666 667 case NativeBridgeAction::kInitialize: 668 InitializeNativeBridge(env, isa); 669 break; 670 } 671 } 672 673 // Create the thread pools. 674 heap_->CreateThreadPool(); 675 // Reset the gc performance data at zygote fork so that the GCs 676 // before fork aren't attributed to an app. 677 heap_->ResetGcPerformanceInfo(); 678 679 if (jit_.get() == nullptr && jit_options_->UseJIT()) { 680 // Create the JIT if the flag is set and we haven't already create it (happens for run-tests). 681 CreateJit(); 682 } 683 684 StartSignalCatcher(); 685 686 // Start the JDWP thread. If the command-line debugger flags specified "suspend=y", 687 // this will pause the runtime, so we probably want this to come last. 688 Dbg::StartJdwp(); 689} 690 691void Runtime::StartSignalCatcher() { 692 if (!is_zygote_) { 693 signal_catcher_ = new SignalCatcher(stack_trace_file_); 694 } 695} 696 697bool Runtime::IsShuttingDown(Thread* self) { 698 MutexLock mu(self, *Locks::runtime_shutdown_lock_); 699 return IsShuttingDownLocked(); 700} 701 702bool Runtime::IsDebuggable() const { 703 const OatFile* oat_file = GetOatFileManager().GetPrimaryOatFile(); 704 return oat_file != nullptr && oat_file->IsDebuggable(); 705} 706 707void Runtime::StartDaemonThreads() { 708 VLOG(startup) << "Runtime::StartDaemonThreads entering"; 709 710 Thread* self = Thread::Current(); 711 712 // Must be in the kNative state for calling native methods. 713 CHECK_EQ(self->GetState(), kNative); 714 715 JNIEnv* env = self->GetJniEnv(); 716 env->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons, 717 WellKnownClasses::java_lang_Daemons_start); 718 if (env->ExceptionCheck()) { 719 env->ExceptionDescribe(); 720 LOG(FATAL) << "Error starting java.lang.Daemons"; 721 } 722 723 VLOG(startup) << "Runtime::StartDaemonThreads exiting"; 724} 725 726static bool OpenDexFilesFromImage(const std::string& image_location, 727 std::vector<std::unique_ptr<const DexFile>>* dex_files, 728 size_t* failures) { 729 DCHECK(dex_files != nullptr) << "OpenDexFilesFromImage: out-param is nullptr"; 730 std::string system_filename; 731 bool has_system = false; 732 std::string cache_filename_unused; 733 bool dalvik_cache_exists_unused; 734 bool has_cache_unused; 735 bool is_global_cache_unused; 736 bool found_image = gc::space::ImageSpace::FindImageFilename(image_location.c_str(), 737 kRuntimeISA, 738 &system_filename, 739 &has_system, 740 &cache_filename_unused, 741 &dalvik_cache_exists_unused, 742 &has_cache_unused, 743 &is_global_cache_unused); 744 *failures = 0; 745 if (!found_image || !has_system) { 746 return false; 747 } 748 std::string error_msg; 749 // We are falling back to non-executable use of the oat file because patching failed, presumably 750 // due to lack of space. 751 std::string oat_filename = ImageHeader::GetOatLocationFromImageLocation(system_filename.c_str()); 752 std::string oat_location = ImageHeader::GetOatLocationFromImageLocation(image_location.c_str()); 753 std::unique_ptr<File> file(OS::OpenFileForReading(oat_filename.c_str())); 754 if (file.get() == nullptr) { 755 return false; 756 } 757 std::unique_ptr<ElfFile> elf_file(ElfFile::Open(file.release(), false, false, &error_msg)); 758 if (elf_file.get() == nullptr) { 759 return false; 760 } 761 std::unique_ptr<const OatFile> oat_file( 762 OatFile::OpenWithElfFile(elf_file.release(), oat_location, nullptr, &error_msg)); 763 if (oat_file == nullptr) { 764 LOG(INFO) << "Unable to use '" << oat_filename << "' because " << error_msg; 765 return false; 766 } 767 768 for (const OatFile::OatDexFile* oat_dex_file : oat_file->GetOatDexFiles()) { 769 if (oat_dex_file == nullptr) { 770 *failures += 1; 771 continue; 772 } 773 std::unique_ptr<const DexFile> dex_file = oat_dex_file->OpenDexFile(&error_msg); 774 if (dex_file.get() == nullptr) { 775 *failures += 1; 776 } else { 777 dex_files->push_back(std::move(dex_file)); 778 } 779 } 780 Runtime::Current()->GetOatFileManager().RegisterOatFile(std::move(oat_file)); 781 return true; 782} 783 784 785static size_t OpenDexFiles(const std::vector<std::string>& dex_filenames, 786 const std::vector<std::string>& dex_locations, 787 const std::string& image_location, 788 std::vector<std::unique_ptr<const DexFile>>* dex_files) { 789 DCHECK(dex_files != nullptr) << "OpenDexFiles: out-param is nullptr"; 790 size_t failure_count = 0; 791 if (!image_location.empty() && OpenDexFilesFromImage(image_location, dex_files, &failure_count)) { 792 return failure_count; 793 } 794 failure_count = 0; 795 for (size_t i = 0; i < dex_filenames.size(); i++) { 796 const char* dex_filename = dex_filenames[i].c_str(); 797 const char* dex_location = dex_locations[i].c_str(); 798 std::string error_msg; 799 if (!OS::FileExists(dex_filename)) { 800 LOG(WARNING) << "Skipping non-existent dex file '" << dex_filename << "'"; 801 continue; 802 } 803 if (!DexFile::Open(dex_filename, dex_location, &error_msg, dex_files)) { 804 LOG(WARNING) << "Failed to open .dex from file '" << dex_filename << "': " << error_msg; 805 ++failure_count; 806 } 807 } 808 return failure_count; 809} 810 811void Runtime::SetSentinel(mirror::Object* sentinel) { 812 CHECK(sentinel_.Read() == nullptr); 813 CHECK(sentinel != nullptr); 814 sentinel_ = GcRoot<mirror::Object>(sentinel); 815} 816 817bool Runtime::Init(const RuntimeOptions& raw_options, bool ignore_unrecognized) { 818 ATRACE_BEGIN("Runtime::Init"); 819 CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize); 820 821 MemMap::Init(); 822 823 using Opt = RuntimeArgumentMap; 824 RuntimeArgumentMap runtime_options; 825 std::unique_ptr<ParsedOptions> parsed_options( 826 ParsedOptions::Create(raw_options, ignore_unrecognized, &runtime_options)); 827 if (parsed_options.get() == nullptr) { 828 LOG(ERROR) << "Failed to parse options"; 829 ATRACE_END(); 830 return false; 831 } 832 VLOG(startup) << "Runtime::Init -verbose:startup enabled"; 833 834 QuasiAtomic::Startup(); 835 836 oat_file_manager_ = new OatFileManager; 837 838 Monitor::Init(runtime_options.GetOrDefault(Opt::LockProfThreshold), 839 runtime_options.GetOrDefault(Opt::HookIsSensitiveThread)); 840 841 boot_class_path_string_ = runtime_options.ReleaseOrDefault(Opt::BootClassPath); 842 class_path_string_ = runtime_options.ReleaseOrDefault(Opt::ClassPath); 843 properties_ = runtime_options.ReleaseOrDefault(Opt::PropertiesList); 844 845 compiler_callbacks_ = runtime_options.GetOrDefault(Opt::CompilerCallbacksPtr); 846 patchoat_executable_ = runtime_options.ReleaseOrDefault(Opt::PatchOat); 847 must_relocate_ = runtime_options.GetOrDefault(Opt::Relocate); 848 is_zygote_ = runtime_options.Exists(Opt::Zygote); 849 is_explicit_gc_disabled_ = runtime_options.Exists(Opt::DisableExplicitGC); 850 dex2oat_enabled_ = runtime_options.GetOrDefault(Opt::Dex2Oat); 851 image_dex2oat_enabled_ = runtime_options.GetOrDefault(Opt::ImageDex2Oat); 852 853 vfprintf_ = runtime_options.GetOrDefault(Opt::HookVfprintf); 854 exit_ = runtime_options.GetOrDefault(Opt::HookExit); 855 abort_ = runtime_options.GetOrDefault(Opt::HookAbort); 856 857 default_stack_size_ = runtime_options.GetOrDefault(Opt::StackSize); 858 stack_trace_file_ = runtime_options.ReleaseOrDefault(Opt::StackTraceFile); 859 860 compiler_executable_ = runtime_options.ReleaseOrDefault(Opt::Compiler); 861 compiler_options_ = runtime_options.ReleaseOrDefault(Opt::CompilerOptions); 862 image_compiler_options_ = runtime_options.ReleaseOrDefault(Opt::ImageCompilerOptions); 863 image_location_ = runtime_options.GetOrDefault(Opt::Image); 864 865 max_spins_before_thin_lock_inflation_ = 866 runtime_options.GetOrDefault(Opt::MaxSpinsBeforeThinLockInflation); 867 868 monitor_list_ = new MonitorList; 869 monitor_pool_ = MonitorPool::Create(); 870 thread_list_ = new ThreadList; 871 intern_table_ = new InternTable; 872 873 verify_ = runtime_options.GetOrDefault(Opt::Verify); 874 allow_dex_file_fallback_ = !runtime_options.Exists(Opt::NoDexFileFallback); 875 876 no_sig_chain_ = runtime_options.Exists(Opt::NoSigChain); 877 878 Split(runtime_options.GetOrDefault(Opt::CpuAbiList), ',', &cpu_abilist_); 879 880 fingerprint_ = runtime_options.ReleaseOrDefault(Opt::Fingerprint); 881 882 if (runtime_options.GetOrDefault(Opt::Interpret)) { 883 GetInstrumentation()->ForceInterpretOnly(); 884 } 885 886 zygote_max_failed_boots_ = runtime_options.GetOrDefault(Opt::ZygoteMaxFailedBoots); 887 experimental_lambdas_ = runtime_options.GetOrDefault(Opt::ExperimentalLambdas); 888 889 XGcOption xgc_option = runtime_options.GetOrDefault(Opt::GcOption); 890 ATRACE_BEGIN("CreateHeap"); 891 heap_ = new gc::Heap(runtime_options.GetOrDefault(Opt::MemoryInitialSize), 892 runtime_options.GetOrDefault(Opt::HeapGrowthLimit), 893 runtime_options.GetOrDefault(Opt::HeapMinFree), 894 runtime_options.GetOrDefault(Opt::HeapMaxFree), 895 runtime_options.GetOrDefault(Opt::HeapTargetUtilization), 896 runtime_options.GetOrDefault(Opt::ForegroundHeapGrowthMultiplier), 897 runtime_options.GetOrDefault(Opt::MemoryMaximumSize), 898 runtime_options.GetOrDefault(Opt::NonMovingSpaceCapacity), 899 runtime_options.GetOrDefault(Opt::Image), 900 runtime_options.GetOrDefault(Opt::ImageInstructionSet), 901 xgc_option.collector_type_, 902 runtime_options.GetOrDefault(Opt::BackgroundGc), 903 runtime_options.GetOrDefault(Opt::LargeObjectSpace), 904 runtime_options.GetOrDefault(Opt::LargeObjectThreshold), 905 runtime_options.GetOrDefault(Opt::ParallelGCThreads), 906 runtime_options.GetOrDefault(Opt::ConcGCThreads), 907 runtime_options.Exists(Opt::LowMemoryMode), 908 runtime_options.GetOrDefault(Opt::LongPauseLogThreshold), 909 runtime_options.GetOrDefault(Opt::LongGCLogThreshold), 910 runtime_options.Exists(Opt::IgnoreMaxFootprint), 911 runtime_options.GetOrDefault(Opt::UseTLAB), 912 xgc_option.verify_pre_gc_heap_, 913 xgc_option.verify_pre_sweeping_heap_, 914 xgc_option.verify_post_gc_heap_, 915 xgc_option.verify_pre_gc_rosalloc_, 916 xgc_option.verify_pre_sweeping_rosalloc_, 917 xgc_option.verify_post_gc_rosalloc_, 918 xgc_option.gcstress_, 919 runtime_options.GetOrDefault(Opt::EnableHSpaceCompactForOOM), 920 runtime_options.GetOrDefault(Opt::HSpaceCompactForOOMMinIntervalsMs)); 921 ATRACE_END(); 922 923 if (heap_->GetImageSpace() == nullptr && !allow_dex_file_fallback_) { 924 LOG(ERROR) << "Dex file fallback disabled, cannot continue without image."; 925 ATRACE_END(); 926 return false; 927 } 928 929 dump_gc_performance_on_shutdown_ = runtime_options.Exists(Opt::DumpGCPerformanceOnShutdown); 930 931 if (runtime_options.Exists(Opt::JdwpOptions)) { 932 Dbg::ConfigureJdwp(runtime_options.GetOrDefault(Opt::JdwpOptions)); 933 } 934 935 jit_options_.reset(jit::JitOptions::CreateFromRuntimeArguments(runtime_options)); 936 if (IsAotCompiler()) { 937 // If we are already the compiler at this point, we must be dex2oat. Don't create the jit in 938 // this case. 939 // If runtime_options doesn't have UseJIT set to true then CreateFromRuntimeArguments returns 940 // null and we don't create the jit. 941 jit_options_->SetUseJIT(false); 942 } 943 944 // Allocate a global table of boxed lambda objects <-> closures. 945 lambda_box_table_ = MakeUnique<lambda::BoxTable>(); 946 947 // Use MemMap arena pool for jit, malloc otherwise. Malloc arenas are faster to allocate but 948 // can't be trimmed as easily. 949 const bool use_malloc = IsAotCompiler(); 950 arena_pool_.reset(new ArenaPool(use_malloc, false)); 951 if (IsAotCompiler() && Is64BitInstructionSet(kRuntimeISA)) { 952 // 4gb, no malloc. Explanation in header. 953 low_4gb_arena_pool_.reset(new ArenaPool(false, true)); 954 } 955 linear_alloc_.reset(CreateLinearAlloc()); 956 957 BlockSignals(); 958 InitPlatformSignalHandlers(); 959 960 // Change the implicit checks flags based on runtime architecture. 961 switch (kRuntimeISA) { 962 case kArm: 963 case kThumb2: 964 case kX86: 965 case kArm64: 966 case kX86_64: 967 case kMips: 968 case kMips64: 969 implicit_null_checks_ = true; 970 // Installing stack protection does not play well with valgrind. 971 implicit_so_checks_ = !(RUNNING_ON_MEMORY_TOOL && kMemoryToolIsValgrind); 972 break; 973 default: 974 // Keep the defaults. 975 break; 976 } 977 978 if (!no_sig_chain_) { 979 // Dex2Oat's Runtime does not need the signal chain or the fault handler. 980 981 // Initialize the signal chain so that any calls to sigaction get 982 // correctly routed to the next in the chain regardless of whether we 983 // have claimed the signal or not. 984 InitializeSignalChain(); 985 986 if (implicit_null_checks_ || implicit_so_checks_ || implicit_suspend_checks_) { 987 fault_manager.Init(); 988 989 // These need to be in a specific order. The null point check handler must be 990 // after the suspend check and stack overflow check handlers. 991 // 992 // Note: the instances attach themselves to the fault manager and are handled by it. The manager 993 // will delete the instance on Shutdown(). 994 if (implicit_suspend_checks_) { 995 new SuspensionHandler(&fault_manager); 996 } 997 998 if (implicit_so_checks_) { 999 new StackOverflowHandler(&fault_manager); 1000 } 1001 1002 if (implicit_null_checks_) { 1003 new NullPointerHandler(&fault_manager); 1004 } 1005 1006 if (kEnableJavaStackTraceHandler) { 1007 new JavaStackTraceHandler(&fault_manager); 1008 } 1009 } 1010 } 1011 1012 java_vm_ = new JavaVMExt(this, runtime_options); 1013 1014 Thread::Startup(); 1015 1016 // ClassLinker needs an attached thread, but we can't fully attach a thread without creating 1017 // objects. We can't supply a thread group yet; it will be fixed later. Since we are the main 1018 // thread, we do not get a java peer. 1019 Thread* self = Thread::Attach("main", false, nullptr, false); 1020 CHECK_EQ(self->GetThreadId(), ThreadList::kMainThreadId); 1021 CHECK(self != nullptr); 1022 1023 // Set us to runnable so tools using a runtime can allocate and GC by default 1024 self->TransitionFromSuspendedToRunnable(); 1025 1026 // Now we're attached, we can take the heap locks and validate the heap. 1027 GetHeap()->EnableObjectValidation(); 1028 1029 CHECK_GE(GetHeap()->GetContinuousSpaces().size(), 1U); 1030 class_linker_ = new ClassLinker(intern_table_); 1031 if (GetHeap()->HasImageSpace()) { 1032 ATRACE_BEGIN("InitFromImage"); 1033 class_linker_->InitFromImage(); 1034 ATRACE_END(); 1035 if (kIsDebugBuild) { 1036 GetHeap()->GetImageSpace()->VerifyImageAllocations(); 1037 } 1038 if (boot_class_path_string_.empty()) { 1039 // The bootclasspath is not explicitly specified: construct it from the loaded dex files. 1040 const std::vector<const DexFile*>& boot_class_path = GetClassLinker()->GetBootClassPath(); 1041 std::vector<std::string> dex_locations; 1042 dex_locations.reserve(boot_class_path.size()); 1043 for (const DexFile* dex_file : boot_class_path) { 1044 dex_locations.push_back(dex_file->GetLocation()); 1045 } 1046 boot_class_path_string_ = Join(dex_locations, ':'); 1047 } 1048 } else { 1049 std::vector<std::string> dex_filenames; 1050 Split(boot_class_path_string_, ':', &dex_filenames); 1051 1052 std::vector<std::string> dex_locations; 1053 if (!runtime_options.Exists(Opt::BootClassPathLocations)) { 1054 dex_locations = dex_filenames; 1055 } else { 1056 dex_locations = runtime_options.GetOrDefault(Opt::BootClassPathLocations); 1057 CHECK_EQ(dex_filenames.size(), dex_locations.size()); 1058 } 1059 1060 std::vector<std::unique_ptr<const DexFile>> boot_class_path; 1061 OpenDexFiles(dex_filenames, 1062 dex_locations, 1063 runtime_options.GetOrDefault(Opt::Image), 1064 &boot_class_path); 1065 instruction_set_ = runtime_options.GetOrDefault(Opt::ImageInstructionSet); 1066 class_linker_->InitWithoutImage(std::move(boot_class_path)); 1067 1068 // TODO: Should we move the following to InitWithoutImage? 1069 SetInstructionSet(instruction_set_); 1070 for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) { 1071 Runtime::CalleeSaveType type = Runtime::CalleeSaveType(i); 1072 if (!HasCalleeSaveMethod(type)) { 1073 SetCalleeSaveMethod(CreateCalleeSaveMethod(), type); 1074 } 1075 } 1076 } 1077 1078 CHECK(class_linker_ != nullptr); 1079 1080 verifier::MethodVerifier::Init(); 1081 1082 if (runtime_options.Exists(Opt::MethodTrace)) { 1083 trace_config_.reset(new TraceConfig()); 1084 trace_config_->trace_file = runtime_options.ReleaseOrDefault(Opt::MethodTraceFile); 1085 trace_config_->trace_file_size = runtime_options.ReleaseOrDefault(Opt::MethodTraceFileSize); 1086 trace_config_->trace_mode = Trace::TraceMode::kMethodTracing; 1087 trace_config_->trace_output_mode = runtime_options.Exists(Opt::MethodTraceStreaming) ? 1088 Trace::TraceOutputMode::kStreaming : 1089 Trace::TraceOutputMode::kFile; 1090 } 1091 1092 { 1093 auto&& profiler_options = runtime_options.ReleaseOrDefault(Opt::ProfilerOpts); 1094 profile_output_filename_ = profiler_options.output_file_name_; 1095 1096 // TODO: Don't do this, just change ProfilerOptions to include the output file name? 1097 ProfilerOptions other_options( 1098 profiler_options.enabled_, 1099 profiler_options.period_s_, 1100 profiler_options.duration_s_, 1101 profiler_options.interval_us_, 1102 profiler_options.backoff_coefficient_, 1103 profiler_options.start_immediately_, 1104 profiler_options.top_k_threshold_, 1105 profiler_options.top_k_change_threshold_, 1106 profiler_options.profile_type_, 1107 profiler_options.max_stack_depth_); 1108 1109 profiler_options_ = other_options; 1110 } 1111 1112 // TODO: move this to just be an Trace::Start argument 1113 Trace::SetDefaultClockSource(runtime_options.GetOrDefault(Opt::ProfileClock)); 1114 1115 // Pre-allocate an OutOfMemoryError for the double-OOME case. 1116 self->ThrowNewException("Ljava/lang/OutOfMemoryError;", 1117 "OutOfMemoryError thrown while trying to throw OutOfMemoryError; " 1118 "no stack trace available"); 1119 pre_allocated_OutOfMemoryError_ = GcRoot<mirror::Throwable>(self->GetException()); 1120 self->ClearException(); 1121 1122 // Pre-allocate a NoClassDefFoundError for the common case of failing to find a system class 1123 // ahead of checking the application's class loader. 1124 self->ThrowNewException("Ljava/lang/NoClassDefFoundError;", 1125 "Class not found using the boot class loader; no stack trace available"); 1126 pre_allocated_NoClassDefFoundError_ = GcRoot<mirror::Throwable>(self->GetException()); 1127 self->ClearException(); 1128 1129 // Look for a native bridge. 1130 // 1131 // The intended flow here is, in the case of a running system: 1132 // 1133 // Runtime::Init() (zygote): 1134 // LoadNativeBridge -> dlopen from cmd line parameter. 1135 // | 1136 // V 1137 // Runtime::Start() (zygote): 1138 // No-op wrt native bridge. 1139 // | 1140 // | start app 1141 // V 1142 // DidForkFromZygote(action) 1143 // action = kUnload -> dlclose native bridge. 1144 // action = kInitialize -> initialize library 1145 // 1146 // 1147 // The intended flow here is, in the case of a simple dalvikvm call: 1148 // 1149 // Runtime::Init(): 1150 // LoadNativeBridge -> dlopen from cmd line parameter. 1151 // | 1152 // V 1153 // Runtime::Start(): 1154 // DidForkFromZygote(kInitialize) -> try to initialize any native bridge given. 1155 // No-op wrt native bridge. 1156 { 1157 std::string native_bridge_file_name = runtime_options.ReleaseOrDefault(Opt::NativeBridge); 1158 is_native_bridge_loaded_ = LoadNativeBridge(native_bridge_file_name); 1159 } 1160 1161 VLOG(startup) << "Runtime::Init exiting"; 1162 1163 ATRACE_END(); 1164 1165 return true; 1166} 1167 1168void Runtime::InitNativeMethods() { 1169 VLOG(startup) << "Runtime::InitNativeMethods entering"; 1170 Thread* self = Thread::Current(); 1171 JNIEnv* env = self->GetJniEnv(); 1172 1173 // Must be in the kNative state for calling native methods (JNI_OnLoad code). 1174 CHECK_EQ(self->GetState(), kNative); 1175 1176 // First set up JniConstants, which is used by both the runtime's built-in native 1177 // methods and libcore. 1178 JniConstants::init(env); 1179 WellKnownClasses::Init(env); 1180 1181 // Then set up the native methods provided by the runtime itself. 1182 RegisterRuntimeNativeMethods(env); 1183 1184 // Then set up libcore, which is just a regular JNI library with a regular JNI_OnLoad. 1185 // Most JNI libraries can just use System.loadLibrary, but libcore can't because it's 1186 // the library that implements System.loadLibrary! 1187 { 1188 std::string reason; 1189 if (!java_vm_->LoadNativeLibrary(env, "libjavacore.so", nullptr, &reason)) { 1190 LOG(FATAL) << "LoadNativeLibrary failed for \"libjavacore.so\": " << reason; 1191 } 1192 } 1193 1194 // Initialize well known classes that may invoke runtime native methods. 1195 WellKnownClasses::LateInit(env); 1196 1197 VLOG(startup) << "Runtime::InitNativeMethods exiting"; 1198} 1199 1200void Runtime::InitThreadGroups(Thread* self) { 1201 JNIEnvExt* env = self->GetJniEnv(); 1202 ScopedJniEnvLocalRefState env_state(env); 1203 main_thread_group_ = 1204 env->NewGlobalRef(env->GetStaticObjectField( 1205 WellKnownClasses::java_lang_ThreadGroup, 1206 WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup)); 1207 CHECK(main_thread_group_ != nullptr || IsAotCompiler()); 1208 system_thread_group_ = 1209 env->NewGlobalRef(env->GetStaticObjectField( 1210 WellKnownClasses::java_lang_ThreadGroup, 1211 WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup)); 1212 CHECK(system_thread_group_ != nullptr || IsAotCompiler()); 1213} 1214 1215jobject Runtime::GetMainThreadGroup() const { 1216 CHECK(main_thread_group_ != nullptr || IsAotCompiler()); 1217 return main_thread_group_; 1218} 1219 1220jobject Runtime::GetSystemThreadGroup() const { 1221 CHECK(system_thread_group_ != nullptr || IsAotCompiler()); 1222 return system_thread_group_; 1223} 1224 1225jobject Runtime::GetSystemClassLoader() const { 1226 CHECK(system_class_loader_ != nullptr || IsAotCompiler()); 1227 return system_class_loader_; 1228} 1229 1230void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) { 1231 register_dalvik_system_DexFile(env); 1232 register_dalvik_system_VMDebug(env); 1233 register_dalvik_system_VMRuntime(env); 1234 register_dalvik_system_VMStack(env); 1235 register_dalvik_system_ZygoteHooks(env); 1236 register_java_lang_Class(env); 1237 register_java_lang_DexCache(env); 1238 register_java_lang_Object(env); 1239 register_java_lang_ref_FinalizerReference(env); 1240 register_java_lang_reflect_Array(env); 1241 register_java_lang_reflect_Constructor(env); 1242 register_java_lang_reflect_Field(env); 1243 register_java_lang_reflect_Method(env); 1244 register_java_lang_reflect_Proxy(env); 1245 register_java_lang_ref_Reference(env); 1246 register_java_lang_Runtime(env); 1247 register_java_lang_String(env); 1248 register_java_lang_StringFactory(env); 1249 register_java_lang_System(env); 1250 register_java_lang_Thread(env); 1251 register_java_lang_Throwable(env); 1252 register_java_lang_VMClassLoader(env); 1253 register_java_util_concurrent_atomic_AtomicLong(env); 1254 register_libcore_util_CharsetUtils(env); 1255 register_org_apache_harmony_dalvik_ddmc_DdmServer(env); 1256 register_org_apache_harmony_dalvik_ddmc_DdmVmInternal(env); 1257 register_sun_misc_Unsafe(env); 1258} 1259 1260void Runtime::DumpForSigQuit(std::ostream& os) { 1261 GetClassLinker()->DumpForSigQuit(os); 1262 GetInternTable()->DumpForSigQuit(os); 1263 GetJavaVM()->DumpForSigQuit(os); 1264 GetHeap()->DumpForSigQuit(os); 1265 TrackedAllocators::Dump(os); 1266 os << "\n"; 1267 1268 thread_list_->DumpForSigQuit(os); 1269 BaseMutex::DumpAll(os); 1270} 1271 1272void Runtime::DumpLockHolders(std::ostream& os) { 1273 uint64_t mutator_lock_owner = Locks::mutator_lock_->GetExclusiveOwnerTid(); 1274 pid_t thread_list_lock_owner = GetThreadList()->GetLockOwner(); 1275 pid_t classes_lock_owner = GetClassLinker()->GetClassesLockOwner(); 1276 pid_t dex_lock_owner = GetClassLinker()->GetDexLockOwner(); 1277 if ((thread_list_lock_owner | classes_lock_owner | dex_lock_owner) != 0) { 1278 os << "Mutator lock exclusive owner tid: " << mutator_lock_owner << "\n" 1279 << "ThreadList lock owner tid: " << thread_list_lock_owner << "\n" 1280 << "ClassLinker classes lock owner tid: " << classes_lock_owner << "\n" 1281 << "ClassLinker dex lock owner tid: " << dex_lock_owner << "\n"; 1282 } 1283} 1284 1285void Runtime::SetStatsEnabled(bool new_state) { 1286 Thread* self = Thread::Current(); 1287 MutexLock mu(self, *Locks::instrument_entrypoints_lock_); 1288 if (new_state == true) { 1289 GetStats()->Clear(~0); 1290 // TODO: wouldn't it make more sense to clear _all_ threads' stats? 1291 self->GetStats()->Clear(~0); 1292 if (stats_enabled_ != new_state) { 1293 GetInstrumentation()->InstrumentQuickAllocEntryPointsLocked(); 1294 } 1295 } else if (stats_enabled_ != new_state) { 1296 GetInstrumentation()->UninstrumentQuickAllocEntryPointsLocked(); 1297 } 1298 stats_enabled_ = new_state; 1299} 1300 1301void Runtime::ResetStats(int kinds) { 1302 GetStats()->Clear(kinds & 0xffff); 1303 // TODO: wouldn't it make more sense to clear _all_ threads' stats? 1304 Thread::Current()->GetStats()->Clear(kinds >> 16); 1305} 1306 1307int32_t Runtime::GetStat(int kind) { 1308 RuntimeStats* stats; 1309 if (kind < (1<<16)) { 1310 stats = GetStats(); 1311 } else { 1312 stats = Thread::Current()->GetStats(); 1313 kind >>= 16; 1314 } 1315 switch (kind) { 1316 case KIND_ALLOCATED_OBJECTS: 1317 return stats->allocated_objects; 1318 case KIND_ALLOCATED_BYTES: 1319 return stats->allocated_bytes; 1320 case KIND_FREED_OBJECTS: 1321 return stats->freed_objects; 1322 case KIND_FREED_BYTES: 1323 return stats->freed_bytes; 1324 case KIND_GC_INVOCATIONS: 1325 return stats->gc_for_alloc_count; 1326 case KIND_CLASS_INIT_COUNT: 1327 return stats->class_init_count; 1328 case KIND_CLASS_INIT_TIME: 1329 // Convert ns to us, reduce to 32 bits. 1330 return static_cast<int>(stats->class_init_time_ns / 1000); 1331 case KIND_EXT_ALLOCATED_OBJECTS: 1332 case KIND_EXT_ALLOCATED_BYTES: 1333 case KIND_EXT_FREED_OBJECTS: 1334 case KIND_EXT_FREED_BYTES: 1335 return 0; // backward compatibility 1336 default: 1337 LOG(FATAL) << "Unknown statistic " << kind; 1338 return -1; // unreachable 1339 } 1340} 1341 1342void Runtime::BlockSignals() { 1343 SignalSet signals; 1344 signals.Add(SIGPIPE); 1345 // SIGQUIT is used to dump the runtime's state (including stack traces). 1346 signals.Add(SIGQUIT); 1347 // SIGUSR1 is used to initiate a GC. 1348 signals.Add(SIGUSR1); 1349 signals.Block(); 1350} 1351 1352bool Runtime::AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group, 1353 bool create_peer) { 1354 return Thread::Attach(thread_name, as_daemon, thread_group, create_peer) != nullptr; 1355} 1356 1357void Runtime::DetachCurrentThread() { 1358 Thread* self = Thread::Current(); 1359 if (self == nullptr) { 1360 LOG(FATAL) << "attempting to detach thread that is not attached"; 1361 } 1362 if (self->HasManagedStack()) { 1363 LOG(FATAL) << *Thread::Current() << " attempting to detach while still running code"; 1364 } 1365 thread_list_->Unregister(self); 1366} 1367 1368mirror::Throwable* Runtime::GetPreAllocatedOutOfMemoryError() { 1369 mirror::Throwable* oome = pre_allocated_OutOfMemoryError_.Read(); 1370 if (oome == nullptr) { 1371 LOG(ERROR) << "Failed to return pre-allocated OOME"; 1372 } 1373 return oome; 1374} 1375 1376mirror::Throwable* Runtime::GetPreAllocatedNoClassDefFoundError() { 1377 mirror::Throwable* ncdfe = pre_allocated_NoClassDefFoundError_.Read(); 1378 if (ncdfe == nullptr) { 1379 LOG(ERROR) << "Failed to return pre-allocated NoClassDefFoundError"; 1380 } 1381 return ncdfe; 1382} 1383 1384void Runtime::VisitConstantRoots(RootVisitor* visitor) { 1385 // Visit the classes held as static in mirror classes, these can be visited concurrently and only 1386 // need to be visited once per GC since they never change. 1387 mirror::Class::VisitRoots(visitor); 1388 mirror::Constructor::VisitRoots(visitor); 1389 mirror::Reference::VisitRoots(visitor); 1390 mirror::Method::VisitRoots(visitor); 1391 mirror::StackTraceElement::VisitRoots(visitor); 1392 mirror::String::VisitRoots(visitor); 1393 mirror::Throwable::VisitRoots(visitor); 1394 mirror::Field::VisitRoots(visitor); 1395 // Visit all the primitive array types classes. 1396 mirror::PrimitiveArray<uint8_t>::VisitRoots(visitor); // BooleanArray 1397 mirror::PrimitiveArray<int8_t>::VisitRoots(visitor); // ByteArray 1398 mirror::PrimitiveArray<uint16_t>::VisitRoots(visitor); // CharArray 1399 mirror::PrimitiveArray<double>::VisitRoots(visitor); // DoubleArray 1400 mirror::PrimitiveArray<float>::VisitRoots(visitor); // FloatArray 1401 mirror::PrimitiveArray<int32_t>::VisitRoots(visitor); // IntArray 1402 mirror::PrimitiveArray<int64_t>::VisitRoots(visitor); // LongArray 1403 mirror::PrimitiveArray<int16_t>::VisitRoots(visitor); // ShortArray 1404 // Visiting the roots of these ArtMethods is not currently required since all the GcRoots are 1405 // null. 1406 BufferedRootVisitor<16> buffered_visitor(visitor, RootInfo(kRootVMInternal)); 1407 const size_t pointer_size = GetClassLinker()->GetImagePointerSize(); 1408 if (HasResolutionMethod()) { 1409 resolution_method_->VisitRoots(buffered_visitor, pointer_size); 1410 } 1411 if (HasImtConflictMethod()) { 1412 imt_conflict_method_->VisitRoots(buffered_visitor, pointer_size); 1413 } 1414 if (imt_unimplemented_method_ != nullptr) { 1415 imt_unimplemented_method_->VisitRoots(buffered_visitor, pointer_size); 1416 } 1417 for (size_t i = 0; i < kLastCalleeSaveType; ++i) { 1418 auto* m = reinterpret_cast<ArtMethod*>(callee_save_methods_[i]); 1419 if (m != nullptr) { 1420 m->VisitRoots(buffered_visitor, pointer_size); 1421 } 1422 } 1423} 1424 1425void Runtime::VisitConcurrentRoots(RootVisitor* visitor, VisitRootFlags flags) { 1426 intern_table_->VisitRoots(visitor, flags); 1427 class_linker_->VisitRoots(visitor, flags); 1428 heap_->VisitAllocationRecords(visitor); 1429 if ((flags & kVisitRootFlagNewRoots) == 0) { 1430 // Guaranteed to have no new roots in the constant roots. 1431 VisitConstantRoots(visitor); 1432 } 1433 Dbg::VisitRoots(visitor); 1434} 1435 1436void Runtime::VisitTransactionRoots(RootVisitor* visitor) { 1437 if (preinitialization_transaction_ != nullptr) { 1438 preinitialization_transaction_->VisitRoots(visitor); 1439 } 1440} 1441 1442void Runtime::VisitNonThreadRoots(RootVisitor* visitor) { 1443 java_vm_->VisitRoots(visitor); 1444 sentinel_.VisitRootIfNonNull(visitor, RootInfo(kRootVMInternal)); 1445 pre_allocated_OutOfMemoryError_.VisitRootIfNonNull(visitor, RootInfo(kRootVMInternal)); 1446 pre_allocated_NoClassDefFoundError_.VisitRootIfNonNull(visitor, RootInfo(kRootVMInternal)); 1447 verifier::MethodVerifier::VisitStaticRoots(visitor); 1448 VisitTransactionRoots(visitor); 1449} 1450 1451void Runtime::VisitNonConcurrentRoots(RootVisitor* visitor) { 1452 thread_list_->VisitRoots(visitor); 1453 VisitNonThreadRoots(visitor); 1454} 1455 1456void Runtime::VisitThreadRoots(RootVisitor* visitor) { 1457 thread_list_->VisitRoots(visitor); 1458} 1459 1460size_t Runtime::FlipThreadRoots(Closure* thread_flip_visitor, Closure* flip_callback, 1461 gc::collector::GarbageCollector* collector) { 1462 return thread_list_->FlipThreadRoots(thread_flip_visitor, flip_callback, collector); 1463} 1464 1465void Runtime::VisitRoots(RootVisitor* visitor, VisitRootFlags flags) { 1466 VisitNonConcurrentRoots(visitor); 1467 VisitConcurrentRoots(visitor, flags); 1468} 1469 1470void Runtime::VisitImageRoots(RootVisitor* visitor) { 1471 for (auto* space : GetHeap()->GetContinuousSpaces()) { 1472 if (space->IsImageSpace()) { 1473 auto* image_space = space->AsImageSpace(); 1474 const auto& image_header = image_space->GetImageHeader(); 1475 for (size_t i = 0; i < ImageHeader::kImageRootsMax; ++i) { 1476 auto* obj = image_header.GetImageRoot(static_cast<ImageHeader::ImageRoot>(i)); 1477 if (obj != nullptr) { 1478 auto* after_obj = obj; 1479 visitor->VisitRoot(&after_obj, RootInfo(kRootStickyClass)); 1480 CHECK_EQ(after_obj, obj); 1481 } 1482 } 1483 } 1484 } 1485} 1486 1487ArtMethod* Runtime::CreateImtConflictMethod() { 1488 auto* method = Runtime::Current()->GetClassLinker()->CreateRuntimeMethod(); 1489 // When compiling, the code pointer will get set later when the image is loaded. 1490 if (IsAotCompiler()) { 1491 size_t pointer_size = GetInstructionSetPointerSize(instruction_set_); 1492 method->SetEntryPointFromQuickCompiledCodePtrSize(nullptr, pointer_size); 1493 } else { 1494 method->SetEntryPointFromQuickCompiledCode(GetQuickImtConflictStub()); 1495 } 1496 return method; 1497} 1498 1499void Runtime::SetImtConflictMethod(ArtMethod* method) { 1500 CHECK(method != nullptr); 1501 CHECK(method->IsRuntimeMethod()); 1502 imt_conflict_method_ = method; 1503} 1504 1505ArtMethod* Runtime::CreateResolutionMethod() { 1506 auto* method = Runtime::Current()->GetClassLinker()->CreateRuntimeMethod(); 1507 // When compiling, the code pointer will get set later when the image is loaded. 1508 if (IsAotCompiler()) { 1509 size_t pointer_size = GetInstructionSetPointerSize(instruction_set_); 1510 method->SetEntryPointFromQuickCompiledCodePtrSize(nullptr, pointer_size); 1511 } else { 1512 method->SetEntryPointFromQuickCompiledCode(GetQuickResolutionStub()); 1513 } 1514 return method; 1515} 1516 1517ArtMethod* Runtime::CreateCalleeSaveMethod() { 1518 auto* method = Runtime::Current()->GetClassLinker()->CreateRuntimeMethod(); 1519 size_t pointer_size = GetInstructionSetPointerSize(instruction_set_); 1520 method->SetEntryPointFromQuickCompiledCodePtrSize(nullptr, pointer_size); 1521 DCHECK_NE(instruction_set_, kNone); 1522 DCHECK(method->IsRuntimeMethod()); 1523 return method; 1524} 1525 1526void Runtime::DisallowNewSystemWeaks() { 1527 CHECK(!kUseReadBarrier); 1528 monitor_list_->DisallowNewMonitors(); 1529 intern_table_->ChangeWeakRootState(gc::kWeakRootStateNoReadsOrWrites); 1530 java_vm_->DisallowNewWeakGlobals(); 1531 heap_->DisallowNewAllocationRecords(); 1532 lambda_box_table_->DisallowNewWeakBoxedLambdas(); 1533} 1534 1535void Runtime::AllowNewSystemWeaks() { 1536 CHECK(!kUseReadBarrier); 1537 monitor_list_->AllowNewMonitors(); 1538 intern_table_->ChangeWeakRootState(gc::kWeakRootStateNormal); // TODO: Do this in the sweeping. 1539 java_vm_->AllowNewWeakGlobals(); 1540 heap_->AllowNewAllocationRecords(); 1541 lambda_box_table_->AllowNewWeakBoxedLambdas(); 1542} 1543 1544void Runtime::BroadcastForNewSystemWeaks() { 1545 // This is used for the read barrier case that uses the thread-local 1546 // Thread::GetWeakRefAccessEnabled() flag. 1547 CHECK(kUseReadBarrier); 1548 monitor_list_->BroadcastForNewMonitors(); 1549 intern_table_->BroadcastForNewInterns(); 1550 java_vm_->BroadcastForNewWeakGlobals(); 1551 heap_->BroadcastForNewAllocationRecords(); 1552 lambda_box_table_->BroadcastForNewWeakBoxedLambdas(); 1553} 1554 1555void Runtime::SetInstructionSet(InstructionSet instruction_set) { 1556 instruction_set_ = instruction_set; 1557 if ((instruction_set_ == kThumb2) || (instruction_set_ == kArm)) { 1558 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1559 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1560 callee_save_method_frame_infos_[i] = arm::ArmCalleeSaveMethodFrameInfo(type); 1561 } 1562 } else if (instruction_set_ == kMips) { 1563 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1564 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1565 callee_save_method_frame_infos_[i] = mips::MipsCalleeSaveMethodFrameInfo(type); 1566 } 1567 } else if (instruction_set_ == kMips64) { 1568 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1569 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1570 callee_save_method_frame_infos_[i] = mips64::Mips64CalleeSaveMethodFrameInfo(type); 1571 } 1572 } else if (instruction_set_ == kX86) { 1573 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1574 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1575 callee_save_method_frame_infos_[i] = x86::X86CalleeSaveMethodFrameInfo(type); 1576 } 1577 } else if (instruction_set_ == kX86_64) { 1578 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1579 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1580 callee_save_method_frame_infos_[i] = x86_64::X86_64CalleeSaveMethodFrameInfo(type); 1581 } 1582 } else if (instruction_set_ == kArm64) { 1583 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1584 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1585 callee_save_method_frame_infos_[i] = arm64::Arm64CalleeSaveMethodFrameInfo(type); 1586 } 1587 } else { 1588 UNIMPLEMENTED(FATAL) << instruction_set_; 1589 } 1590} 1591 1592void Runtime::SetCalleeSaveMethod(ArtMethod* method, CalleeSaveType type) { 1593 DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastCalleeSaveType)); 1594 CHECK(method != nullptr); 1595 callee_save_methods_[type] = reinterpret_cast<uintptr_t>(method); 1596} 1597 1598void Runtime::StartProfiler(const char* profile_output_filename) { 1599 profile_output_filename_ = profile_output_filename; 1600 profiler_started_ = 1601 BackgroundMethodSamplingProfiler::Start(profile_output_filename_, profiler_options_); 1602} 1603 1604// Transaction support. 1605void Runtime::EnterTransactionMode(Transaction* transaction) { 1606 DCHECK(IsAotCompiler()); 1607 DCHECK(transaction != nullptr); 1608 DCHECK(!IsActiveTransaction()); 1609 preinitialization_transaction_ = transaction; 1610} 1611 1612void Runtime::ExitTransactionMode() { 1613 DCHECK(IsAotCompiler()); 1614 DCHECK(IsActiveTransaction()); 1615 preinitialization_transaction_ = nullptr; 1616} 1617 1618bool Runtime::IsTransactionAborted() const { 1619 if (!IsActiveTransaction()) { 1620 return false; 1621 } else { 1622 DCHECK(IsAotCompiler()); 1623 return preinitialization_transaction_->IsAborted(); 1624 } 1625} 1626 1627void Runtime::AbortTransactionAndThrowAbortError(Thread* self, const std::string& abort_message) { 1628 DCHECK(IsAotCompiler()); 1629 DCHECK(IsActiveTransaction()); 1630 // Throwing an exception may cause its class initialization. If we mark the transaction 1631 // aborted before that, we may warn with a false alarm. Throwing the exception before 1632 // marking the transaction aborted avoids that. 1633 preinitialization_transaction_->ThrowAbortError(self, &abort_message); 1634 preinitialization_transaction_->Abort(abort_message); 1635} 1636 1637void Runtime::ThrowTransactionAbortError(Thread* self) { 1638 DCHECK(IsAotCompiler()); 1639 DCHECK(IsActiveTransaction()); 1640 // Passing nullptr means we rethrow an exception with the earlier transaction abort message. 1641 preinitialization_transaction_->ThrowAbortError(self, nullptr); 1642} 1643 1644void Runtime::RecordWriteFieldBoolean(mirror::Object* obj, MemberOffset field_offset, 1645 uint8_t value, bool is_volatile) const { 1646 DCHECK(IsAotCompiler()); 1647 DCHECK(IsActiveTransaction()); 1648 preinitialization_transaction_->RecordWriteFieldBoolean(obj, field_offset, value, is_volatile); 1649} 1650 1651void Runtime::RecordWriteFieldByte(mirror::Object* obj, MemberOffset field_offset, 1652 int8_t value, bool is_volatile) const { 1653 DCHECK(IsAotCompiler()); 1654 DCHECK(IsActiveTransaction()); 1655 preinitialization_transaction_->RecordWriteFieldByte(obj, field_offset, value, is_volatile); 1656} 1657 1658void Runtime::RecordWriteFieldChar(mirror::Object* obj, MemberOffset field_offset, 1659 uint16_t value, bool is_volatile) const { 1660 DCHECK(IsAotCompiler()); 1661 DCHECK(IsActiveTransaction()); 1662 preinitialization_transaction_->RecordWriteFieldChar(obj, field_offset, value, is_volatile); 1663} 1664 1665void Runtime::RecordWriteFieldShort(mirror::Object* obj, MemberOffset field_offset, 1666 int16_t value, bool is_volatile) const { 1667 DCHECK(IsAotCompiler()); 1668 DCHECK(IsActiveTransaction()); 1669 preinitialization_transaction_->RecordWriteFieldShort(obj, field_offset, value, is_volatile); 1670} 1671 1672void Runtime::RecordWriteField32(mirror::Object* obj, MemberOffset field_offset, 1673 uint32_t value, bool is_volatile) const { 1674 DCHECK(IsAotCompiler()); 1675 DCHECK(IsActiveTransaction()); 1676 preinitialization_transaction_->RecordWriteField32(obj, field_offset, value, is_volatile); 1677} 1678 1679void Runtime::RecordWriteField64(mirror::Object* obj, MemberOffset field_offset, 1680 uint64_t value, bool is_volatile) const { 1681 DCHECK(IsAotCompiler()); 1682 DCHECK(IsActiveTransaction()); 1683 preinitialization_transaction_->RecordWriteField64(obj, field_offset, value, is_volatile); 1684} 1685 1686void Runtime::RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset, 1687 mirror::Object* value, bool is_volatile) const { 1688 DCHECK(IsAotCompiler()); 1689 DCHECK(IsActiveTransaction()); 1690 preinitialization_transaction_->RecordWriteFieldReference(obj, field_offset, value, is_volatile); 1691} 1692 1693void Runtime::RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const { 1694 DCHECK(IsAotCompiler()); 1695 DCHECK(IsActiveTransaction()); 1696 preinitialization_transaction_->RecordWriteArray(array, index, value); 1697} 1698 1699void Runtime::RecordStrongStringInsertion(mirror::String* s) const { 1700 DCHECK(IsAotCompiler()); 1701 DCHECK(IsActiveTransaction()); 1702 preinitialization_transaction_->RecordStrongStringInsertion(s); 1703} 1704 1705void Runtime::RecordWeakStringInsertion(mirror::String* s) const { 1706 DCHECK(IsAotCompiler()); 1707 DCHECK(IsActiveTransaction()); 1708 preinitialization_transaction_->RecordWeakStringInsertion(s); 1709} 1710 1711void Runtime::RecordStrongStringRemoval(mirror::String* s) const { 1712 DCHECK(IsAotCompiler()); 1713 DCHECK(IsActiveTransaction()); 1714 preinitialization_transaction_->RecordStrongStringRemoval(s); 1715} 1716 1717void Runtime::RecordWeakStringRemoval(mirror::String* s) const { 1718 DCHECK(IsAotCompiler()); 1719 DCHECK(IsActiveTransaction()); 1720 preinitialization_transaction_->RecordWeakStringRemoval(s); 1721} 1722 1723void Runtime::SetFaultMessage(const std::string& message) { 1724 MutexLock mu(Thread::Current(), fault_message_lock_); 1725 fault_message_ = message; 1726} 1727 1728void Runtime::AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* argv) 1729 const { 1730 if (GetInstrumentation()->InterpretOnly() || UseJit()) { 1731 argv->push_back("--compiler-filter=interpret-only"); 1732 } 1733 1734 // Make the dex2oat instruction set match that of the launching runtime. If we have multiple 1735 // architecture support, dex2oat may be compiled as a different instruction-set than that 1736 // currently being executed. 1737 std::string instruction_set("--instruction-set="); 1738 instruction_set += GetInstructionSetString(kRuntimeISA); 1739 argv->push_back(instruction_set); 1740 1741 std::unique_ptr<const InstructionSetFeatures> features(InstructionSetFeatures::FromCppDefines()); 1742 std::string feature_string("--instruction-set-features="); 1743 feature_string += features->GetFeatureString(); 1744 argv->push_back(feature_string); 1745} 1746 1747void Runtime::UpdateProfilerState(int state) { 1748 VLOG(profiler) << "Profiler state updated to " << state; 1749} 1750 1751void Runtime::CreateJit() { 1752 CHECK(!IsAotCompiler()); 1753 if (GetInstrumentation()->IsForcedInterpretOnly()) { 1754 // Don't create JIT if forced interpret only. 1755 return; 1756 } 1757 std::string error_msg; 1758 jit_.reset(jit::Jit::Create(jit_options_.get(), &error_msg)); 1759 if (jit_.get() != nullptr) { 1760 compiler_callbacks_ = jit_->GetCompilerCallbacks(); 1761 jit_->CreateInstrumentationCache(jit_options_->GetCompileThreshold(), 1762 jit_options_->GetWarmupThreshold()); 1763 jit_->CreateThreadPool(); 1764 } else { 1765 LOG(WARNING) << "Failed to create JIT " << error_msg; 1766 } 1767} 1768 1769bool Runtime::CanRelocate() const { 1770 return !IsAotCompiler() || compiler_callbacks_->IsRelocationPossible(); 1771} 1772 1773bool Runtime::IsCompilingBootImage() const { 1774 return IsCompiler() && compiler_callbacks_->IsBootImage(); 1775} 1776 1777void Runtime::SetResolutionMethod(ArtMethod* method) { 1778 CHECK(method != nullptr); 1779 CHECK(method->IsRuntimeMethod()) << method; 1780 resolution_method_ = method; 1781} 1782 1783void Runtime::SetImtUnimplementedMethod(ArtMethod* method) { 1784 CHECK(method != nullptr); 1785 CHECK(method->IsRuntimeMethod()); 1786 imt_unimplemented_method_ = method; 1787} 1788 1789bool Runtime::IsVerificationEnabled() const { 1790 return verify_ == verifier::VerifyMode::kEnable; 1791} 1792 1793bool Runtime::IsVerificationSoftFail() const { 1794 return verify_ == verifier::VerifyMode::kSoftFail; 1795} 1796 1797LinearAlloc* Runtime::CreateLinearAlloc() { 1798 // For 64 bit compilers, it needs to be in low 4GB in the case where we are cross compiling for a 1799 // 32 bit target. In this case, we have 32 bit pointers in the dex cache arrays which can't hold 1800 // when we have 64 bit ArtMethod pointers. 1801 return (IsAotCompiler() && Is64BitInstructionSet(kRuntimeISA)) 1802 ? new LinearAlloc(low_4gb_arena_pool_.get()) 1803 : new LinearAlloc(arena_pool_.get()); 1804} 1805 1806} // namespace art 1807