runtime.cc revision 017ed0b936539dba1bb6f1d9b2bd81798b471966
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 "os.h" 119#include "parsed_options.h" 120#include "profiler.h" 121#include "quick/quick_method_frame_info.h" 122#include "reflection.h" 123#include "runtime_options.h" 124#include "ScopedLocalRef.h" 125#include "scoped_thread_state_change.h" 126#include "sigchain.h" 127#include "signal_catcher.h" 128#include "signal_set.h" 129#include "thread.h" 130#include "thread_list.h" 131#include "trace.h" 132#include "transaction.h" 133#include "utils.h" 134#include "verifier/method_verifier.h" 135#include "well_known_classes.h" 136 137namespace art { 138 139// If a signal isn't handled properly, enable a handler that attempts to dump the Java stack. 140static constexpr bool kEnableJavaStackTraceHandler = false; 141Runtime* Runtime::instance_ = nullptr; 142 143struct TraceConfig { 144 Trace::TraceMode trace_mode; 145 Trace::TraceOutputMode trace_output_mode; 146 std::string trace_file; 147 size_t trace_file_size; 148}; 149 150Runtime::Runtime() 151 : resolution_method_(nullptr), 152 imt_conflict_method_(nullptr), 153 imt_unimplemented_method_(nullptr), 154 instruction_set_(kNone), 155 compiler_callbacks_(nullptr), 156 is_zygote_(false), 157 must_relocate_(false), 158 is_concurrent_gc_enabled_(true), 159 is_explicit_gc_disabled_(false), 160 dex2oat_enabled_(true), 161 image_dex2oat_enabled_(true), 162 default_stack_size_(0), 163 heap_(nullptr), 164 max_spins_before_thin_lock_inflation_(Monitor::kDefaultMaxSpinsBeforeThinLockInflation), 165 monitor_list_(nullptr), 166 monitor_pool_(nullptr), 167 thread_list_(nullptr), 168 intern_table_(nullptr), 169 class_linker_(nullptr), 170 signal_catcher_(nullptr), 171 java_vm_(nullptr), 172 fault_message_lock_("Fault message lock"), 173 fault_message_(""), 174 threads_being_born_(0), 175 shutdown_cond_(new ConditionVariable("Runtime shutdown", *Locks::runtime_shutdown_lock_)), 176 shutting_down_(false), 177 shutting_down_started_(false), 178 started_(false), 179 finished_starting_(false), 180 vfprintf_(nullptr), 181 exit_(nullptr), 182 abort_(nullptr), 183 stats_enabled_(false), 184 is_running_on_memory_tool_(RUNNING_ON_MEMORY_TOOL), 185 profiler_started_(false), 186 instrumentation_(), 187 main_thread_group_(nullptr), 188 system_thread_group_(nullptr), 189 system_class_loader_(nullptr), 190 dump_gc_performance_on_shutdown_(false), 191 preinitialization_transaction_(nullptr), 192 verify_(verifier::VerifyMode::kNone), 193 allow_dex_file_fallback_(true), 194 target_sdk_version_(0), 195 implicit_null_checks_(false), 196 implicit_so_checks_(false), 197 implicit_suspend_checks_(false), 198 no_sig_chain_(false), 199 is_native_bridge_loaded_(false), 200 zygote_max_failed_boots_(0), 201 experimental_lambdas_(false) { 202 CheckAsmSupportOffsetsAndSizes(); 203 std::fill(callee_save_methods_, callee_save_methods_ + arraysize(callee_save_methods_), 0u); 204} 205 206Runtime::~Runtime() { 207 if (is_native_bridge_loaded_) { 208 UnloadNativeBridge(); 209 } 210 if (dump_gc_performance_on_shutdown_) { 211 // This can't be called from the Heap destructor below because it 212 // could call RosAlloc::InspectAll() which needs the thread_list 213 // to be still alive. 214 heap_->DumpGcPerformanceInfo(LOG(INFO)); 215 } 216 217 Thread* self = Thread::Current(); 218 const bool attach_shutdown_thread = self == nullptr; 219 if (attach_shutdown_thread) { 220 CHECK(AttachCurrentThread("Shutdown thread", false, nullptr, false)); 221 self = Thread::Current(); 222 } else { 223 LOG(WARNING) << "Current thread not detached in Runtime shutdown"; 224 } 225 226 { 227 MutexLock mu(self, *Locks::runtime_shutdown_lock_); 228 shutting_down_started_ = true; 229 while (threads_being_born_ > 0) { 230 shutdown_cond_->Wait(self); 231 } 232 shutting_down_ = true; 233 } 234 // Shutdown and wait for the daemons. 235 CHECK(self != nullptr); 236 if (IsFinishedStarting()) { 237 self->ClearException(); 238 self->GetJniEnv()->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons, 239 WellKnownClasses::java_lang_Daemons_stop); 240 } 241 242 Trace::Shutdown(); 243 244 if (attach_shutdown_thread) { 245 DetachCurrentThread(); 246 self = nullptr; 247 } 248 249 // Shut down background profiler before the runtime exits. 250 if (profiler_started_) { 251 BackgroundMethodSamplingProfiler::Shutdown(); 252 } 253 254 // Make sure to let the GC complete if it is running. 255 heap_->WaitForGcToComplete(gc::kGcCauseBackground, self); 256 heap_->DeleteThreadPool(); 257 if (jit_.get() != nullptr) { 258 VLOG(jit) << "Deleting jit thread pool"; 259 // Delete thread pool before the thread list since we don't want to wait forever on the 260 // JIT compiler threads. 261 jit_->DeleteThreadPool(); 262 } 263 264 // Make sure our internal threads are dead before we start tearing down things they're using. 265 Dbg::StopJdwp(); 266 delete signal_catcher_; 267 268 // Make sure all other non-daemon threads have terminated, and all daemon threads are suspended. 269 delete thread_list_; 270 271 // Delete the JIT after thread list to ensure that there is no remaining threads which could be 272 // accessing the instrumentation when we delete it. 273 if (jit_.get() != nullptr) { 274 VLOG(jit) << "Deleting jit"; 275 jit_.reset(nullptr); 276 } 277 278 // Shutdown the fault manager if it was initialized. 279 fault_manager.Shutdown(); 280 281 delete monitor_list_; 282 delete monitor_pool_; 283 delete class_linker_; 284 delete heap_; 285 delete intern_table_; 286 delete java_vm_; 287 Thread::Shutdown(); 288 QuasiAtomic::Shutdown(); 289 verifier::MethodVerifier::Shutdown(); 290 291 // Destroy allocators before shutting down the MemMap because they may use it. 292 linear_alloc_.reset(); 293 low_4gb_arena_pool_.reset(); 294 arena_pool_.reset(); 295 MemMap::Shutdown(); 296 297 // TODO: acquire a static mutex on Runtime to avoid racing. 298 CHECK(instance_ == nullptr || instance_ == this); 299 instance_ = nullptr; 300} 301 302struct AbortState { 303 void Dump(std::ostream& os) const { 304 if (gAborting > 1) { 305 os << "Runtime aborting --- recursively, so no thread-specific detail!\n"; 306 return; 307 } 308 gAborting++; 309 os << "Runtime aborting...\n"; 310 if (Runtime::Current() == nullptr) { 311 os << "(Runtime does not yet exist!)\n"; 312 return; 313 } 314 Thread* self = Thread::Current(); 315 if (self == nullptr) { 316 os << "(Aborting thread was not attached to runtime!)\n"; 317 DumpKernelStack(os, GetTid(), " kernel: ", false); 318 DumpNativeStack(os, GetTid(), " native: ", nullptr); 319 } else { 320 os << "Aborting thread:\n"; 321 if (Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)) { 322 DumpThread(os, self); 323 } else { 324 if (Locks::mutator_lock_->SharedTryLock(self)) { 325 DumpThread(os, self); 326 Locks::mutator_lock_->SharedUnlock(self); 327 } 328 } 329 } 330 DumpAllThreads(os, self); 331 } 332 333 // No thread-safety analysis as we do explicitly test for holding the mutator lock. 334 void DumpThread(std::ostream& os, Thread* self) const NO_THREAD_SAFETY_ANALYSIS { 335 DCHECK(Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)); 336 self->Dump(os); 337 if (self->IsExceptionPending()) { 338 mirror::Throwable* exception = self->GetException(); 339 os << "Pending exception " << exception->Dump(); 340 } 341 } 342 343 void DumpAllThreads(std::ostream& os, Thread* self) const { 344 Runtime* runtime = Runtime::Current(); 345 if (runtime != nullptr) { 346 ThreadList* thread_list = runtime->GetThreadList(); 347 if (thread_list != nullptr) { 348 bool tll_already_held = Locks::thread_list_lock_->IsExclusiveHeld(self); 349 bool ml_already_held = Locks::mutator_lock_->IsSharedHeld(self); 350 if (!tll_already_held || !ml_already_held) { 351 os << "Dumping all threads without appropriate locks held:" 352 << (!tll_already_held ? " thread list lock" : "") 353 << (!ml_already_held ? " mutator lock" : "") 354 << "\n"; 355 } 356 os << "All threads:\n"; 357 thread_list->Dump(os); 358 } 359 } 360 } 361}; 362 363void Runtime::Abort() { 364 gAborting++; // set before taking any locks 365 366 // Ensure that we don't have multiple threads trying to abort at once, 367 // which would result in significantly worse diagnostics. 368 MutexLock mu(Thread::Current(), *Locks::abort_lock_); 369 370 // Get any pending output out of the way. 371 fflush(nullptr); 372 373 // Many people have difficulty distinguish aborts from crashes, 374 // so be explicit. 375 AbortState state; 376 LOG(INTERNAL_FATAL) << Dumpable<AbortState>(state); 377 378 // Call the abort hook if we have one. 379 if (Runtime::Current() != nullptr && Runtime::Current()->abort_ != nullptr) { 380 LOG(INTERNAL_FATAL) << "Calling abort hook..."; 381 Runtime::Current()->abort_(); 382 // notreached 383 LOG(INTERNAL_FATAL) << "Unexpectedly returned from abort hook!"; 384 } 385 386#if defined(__GLIBC__) 387 // TODO: we ought to be able to use pthread_kill(3) here (or abort(3), 388 // which POSIX defines in terms of raise(3), which POSIX defines in terms 389 // of pthread_kill(3)). On Linux, though, libcorkscrew can't unwind through 390 // libpthread, which means the stacks we dump would be useless. Calling 391 // tgkill(2) directly avoids that. 392 syscall(__NR_tgkill, getpid(), GetTid(), SIGABRT); 393 // TODO: LLVM installs it's own SIGABRT handler so exit to be safe... Can we disable that in LLVM? 394 // If not, we could use sigaction(3) before calling tgkill(2) and lose this call to exit(3). 395 exit(1); 396#else 397 abort(); 398#endif 399 // notreached 400} 401 402void Runtime::PreZygoteFork() { 403 heap_->PreZygoteFork(); 404} 405 406void Runtime::CallExitHook(jint status) { 407 if (exit_ != nullptr) { 408 ScopedThreadStateChange tsc(Thread::Current(), kNative); 409 exit_(status); 410 LOG(WARNING) << "Exit hook returned instead of exiting!"; 411 } 412} 413 414void Runtime::SweepSystemWeaks(IsMarkedVisitor* visitor) { 415 GetInternTable()->SweepInternTableWeaks(visitor); 416 GetMonitorList()->SweepMonitorList(visitor); 417 GetJavaVM()->SweepJniWeakGlobals(visitor); 418 GetHeap()->SweepAllocationRecords(visitor); 419 GetLambdaBoxTable()->SweepWeakBoxedLambdas(visitor); 420} 421 422bool Runtime::Create(const RuntimeOptions& options, bool ignore_unrecognized) { 423 // TODO: acquire a static mutex on Runtime to avoid racing. 424 if (Runtime::instance_ != nullptr) { 425 return false; 426 } 427 InitLogging(nullptr); // Calls Locks::Init() as a side effect. 428 instance_ = new Runtime; 429 if (!instance_->Init(options, ignore_unrecognized)) { 430 // TODO: Currently deleting the instance will abort the runtime on destruction. Now This will 431 // leak memory, instead. Fix the destructor. b/19100793. 432 // delete instance_; 433 instance_ = nullptr; 434 return false; 435 } 436 return true; 437} 438 439static jobject CreateSystemClassLoader(Runtime* runtime) { 440 if (runtime->IsAotCompiler() && !runtime->GetCompilerCallbacks()->IsBootImage()) { 441 return nullptr; 442 } 443 444 ScopedObjectAccess soa(Thread::Current()); 445 ClassLinker* cl = Runtime::Current()->GetClassLinker(); 446 auto pointer_size = cl->GetImagePointerSize(); 447 448 StackHandleScope<2> hs(soa.Self()); 449 Handle<mirror::Class> class_loader_class( 450 hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_ClassLoader))); 451 CHECK(cl->EnsureInitialized(soa.Self(), class_loader_class, true, true)); 452 453 ArtMethod* getSystemClassLoader = class_loader_class->FindDirectMethod( 454 "getSystemClassLoader", "()Ljava/lang/ClassLoader;", pointer_size); 455 CHECK(getSystemClassLoader != nullptr); 456 457 JValue result = InvokeWithJValues(soa, nullptr, soa.EncodeMethod(getSystemClassLoader), nullptr); 458 JNIEnv* env = soa.Self()->GetJniEnv(); 459 ScopedLocalRef<jobject> system_class_loader(env, soa.AddLocalReference<jobject>(result.GetL())); 460 CHECK(system_class_loader.get() != nullptr); 461 462 soa.Self()->SetClassLoaderOverride(system_class_loader.get()); 463 464 Handle<mirror::Class> thread_class( 465 hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_Thread))); 466 CHECK(cl->EnsureInitialized(soa.Self(), thread_class, true, true)); 467 468 ArtField* contextClassLoader = 469 thread_class->FindDeclaredInstanceField("contextClassLoader", "Ljava/lang/ClassLoader;"); 470 CHECK(contextClassLoader != nullptr); 471 472 // We can't run in a transaction yet. 473 contextClassLoader->SetObject<false>(soa.Self()->GetPeer(), 474 soa.Decode<mirror::ClassLoader*>(system_class_loader.get())); 475 476 return env->NewGlobalRef(system_class_loader.get()); 477} 478 479std::string Runtime::GetPatchoatExecutable() const { 480 if (!patchoat_executable_.empty()) { 481 return patchoat_executable_; 482 } 483 std::string patchoat_executable(GetAndroidRoot()); 484 patchoat_executable += (kIsDebugBuild ? "/bin/patchoatd" : "/bin/patchoat"); 485 return patchoat_executable; 486} 487 488std::string Runtime::GetCompilerExecutable() const { 489 if (!compiler_executable_.empty()) { 490 return compiler_executable_; 491 } 492 std::string compiler_executable(GetAndroidRoot()); 493 compiler_executable += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat"); 494 return compiler_executable; 495} 496 497bool Runtime::Start() { 498 VLOG(startup) << "Runtime::Start entering"; 499 500 CHECK(!no_sig_chain_) << "A started runtime should have sig chain enabled"; 501 502 // If a debug host build, disable ptrace restriction for debugging and test timeout thread dump. 503 // Only 64-bit as prctl() may fail in 32 bit userspace on a 64-bit kernel. 504#if defined(__linux__) && !defined(__ANDROID__) && defined(__x86_64__) 505 if (kIsDebugBuild) { 506 CHECK_EQ(prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY), 0); 507 } 508#endif 509 510 // Restore main thread state to kNative as expected by native code. 511 Thread* self = Thread::Current(); 512 513 self->TransitionFromRunnableToSuspended(kNative); 514 515 started_ = true; 516 517 // Use !IsAotCompiler so that we get test coverage, tests are never the zygote. 518 if (!IsAotCompiler()) { 519 ScopedObjectAccess soa(self); 520 gc::space::ImageSpace* image_space = heap_->GetImageSpace(); 521 if (image_space != nullptr) { 522 ATRACE_BEGIN("AddImageStringsToTable"); 523 GetInternTable()->AddImageStringsToTable(image_space); 524 ATRACE_END(); 525 ATRACE_BEGIN("MoveImageClassesToClassTable"); 526 GetClassLinker()->MoveImageClassesToClassTable(); 527 ATRACE_END(); 528 } 529 } 530 531 // If we are the zygote then we need to wait until after forking to create the code cache 532 // due to SELinux restrictions on r/w/x memory regions. 533 if (!IsZygote() && jit_options_->UseJIT()) { 534 CreateJit(); 535 } 536 537 if (!IsImageDex2OatEnabled() || !GetHeap()->HasImageSpace()) { 538 ScopedObjectAccess soa(self); 539 StackHandleScope<1> hs(soa.Self()); 540 auto klass(hs.NewHandle<mirror::Class>(mirror::Class::GetJavaLangClass())); 541 class_linker_->EnsureInitialized(soa.Self(), klass, true, true); 542 } 543 544 // InitNativeMethods needs to be after started_ so that the classes 545 // it touches will have methods linked to the oat file if necessary. 546 ATRACE_BEGIN("InitNativeMethods"); 547 InitNativeMethods(); 548 ATRACE_END(); 549 550 // Initialize well known thread group values that may be accessed threads while attaching. 551 InitThreadGroups(self); 552 553 Thread::FinishStartup(); 554 555 system_class_loader_ = CreateSystemClassLoader(this); 556 557 if (is_zygote_) { 558 if (!InitZygote()) { 559 return false; 560 } 561 } else { 562 if (is_native_bridge_loaded_) { 563 PreInitializeNativeBridge("."); 564 } 565 DidForkFromZygote(self->GetJniEnv(), NativeBridgeAction::kInitialize, 566 GetInstructionSetString(kRuntimeISA)); 567 } 568 569 ATRACE_BEGIN("StartDaemonThreads"); 570 StartDaemonThreads(); 571 ATRACE_END(); 572 573 { 574 ScopedObjectAccess soa(self); 575 self->GetJniEnv()->locals.AssertEmpty(); 576 } 577 578 VLOG(startup) << "Runtime::Start exiting"; 579 finished_starting_ = true; 580 581 if (profiler_options_.IsEnabled() && !profile_output_filename_.empty()) { 582 // User has asked for a profile using -Xenable-profiler. 583 // Create the profile file if it doesn't exist. 584 int fd = open(profile_output_filename_.c_str(), O_RDWR|O_CREAT|O_EXCL, 0660); 585 if (fd >= 0) { 586 close(fd); 587 } else if (errno != EEXIST) { 588 LOG(INFO) << "Failed to access the profile file. Profiler disabled."; 589 return true; 590 } 591 StartProfiler(profile_output_filename_.c_str()); 592 } 593 594 if (trace_config_.get() != nullptr && trace_config_->trace_file != "") { 595 ScopedThreadStateChange tsc(self, kWaitingForMethodTracingStart); 596 Trace::Start(trace_config_->trace_file.c_str(), 597 -1, 598 static_cast<int>(trace_config_->trace_file_size), 599 0, 600 trace_config_->trace_output_mode, 601 trace_config_->trace_mode, 602 0); 603 } 604 605 return true; 606} 607 608void Runtime::EndThreadBirth() REQUIRES(Locks::runtime_shutdown_lock_) { 609 DCHECK_GT(threads_being_born_, 0U); 610 threads_being_born_--; 611 if (shutting_down_started_ && threads_being_born_ == 0) { 612 shutdown_cond_->Broadcast(Thread::Current()); 613 } 614} 615 616// Do zygote-mode-only initialization. 617bool Runtime::InitZygote() { 618#ifdef __linux__ 619 // zygote goes into its own process group 620 setpgid(0, 0); 621 622 // See storage config details at http://source.android.com/tech/storage/ 623 // Create private mount namespace shared by all children 624 if (unshare(CLONE_NEWNS) == -1) { 625 PLOG(ERROR) << "Failed to unshare()"; 626 return false; 627 } 628 629 // Mark rootfs as being a slave so that changes from default 630 // namespace only flow into our children. 631 if (mount("rootfs", "/", nullptr, (MS_SLAVE | MS_REC), nullptr) == -1) { 632 PLOG(ERROR) << "Failed to mount() rootfs as MS_SLAVE"; 633 return false; 634 } 635 636 // Create a staging tmpfs that is shared by our children; they will 637 // bind mount storage into their respective private namespaces, which 638 // are isolated from each other. 639 const char* target_base = getenv("EMULATED_STORAGE_TARGET"); 640 if (target_base != nullptr) { 641 if (mount("tmpfs", target_base, "tmpfs", MS_NOSUID | MS_NODEV, 642 "uid=0,gid=1028,mode=0751") == -1) { 643 PLOG(ERROR) << "Failed to mount tmpfs to " << target_base; 644 return false; 645 } 646 } 647 648 return true; 649#else 650 UNIMPLEMENTED(FATAL); 651 return false; 652#endif 653} 654 655void Runtime::DidForkFromZygote(JNIEnv* env, NativeBridgeAction action, const char* isa) { 656 is_zygote_ = false; 657 658 if (is_native_bridge_loaded_) { 659 switch (action) { 660 case NativeBridgeAction::kUnload: 661 UnloadNativeBridge(); 662 is_native_bridge_loaded_ = false; 663 break; 664 665 case NativeBridgeAction::kInitialize: 666 InitializeNativeBridge(env, isa); 667 break; 668 } 669 } 670 671 // Create the thread pools. 672 heap_->CreateThreadPool(); 673 // Reset the gc performance data at zygote fork so that the GCs 674 // before fork aren't attributed to an app. 675 heap_->ResetGcPerformanceInfo(); 676 677 if (jit_.get() == nullptr && jit_options_->UseJIT()) { 678 // Create the JIT if the flag is set and we haven't already create it (happens for run-tests). 679 CreateJit(); 680 } 681 682 StartSignalCatcher(); 683 684 // Start the JDWP thread. If the command-line debugger flags specified "suspend=y", 685 // this will pause the runtime, so we probably want this to come last. 686 Dbg::StartJdwp(); 687} 688 689void Runtime::StartSignalCatcher() { 690 if (!is_zygote_) { 691 signal_catcher_ = new SignalCatcher(stack_trace_file_); 692 } 693} 694 695bool Runtime::IsShuttingDown(Thread* self) { 696 MutexLock mu(self, *Locks::runtime_shutdown_lock_); 697 return IsShuttingDownLocked(); 698} 699 700bool Runtime::IsDebuggable() const { 701 const OatFile* oat_file = GetClassLinker()->GetPrimaryOatFile(); 702 return oat_file != nullptr && oat_file->IsDebuggable(); 703} 704 705void Runtime::StartDaemonThreads() { 706 VLOG(startup) << "Runtime::StartDaemonThreads entering"; 707 708 Thread* self = Thread::Current(); 709 710 // Must be in the kNative state for calling native methods. 711 CHECK_EQ(self->GetState(), kNative); 712 713 JNIEnv* env = self->GetJniEnv(); 714 env->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons, 715 WellKnownClasses::java_lang_Daemons_start); 716 if (env->ExceptionCheck()) { 717 env->ExceptionDescribe(); 718 LOG(FATAL) << "Error starting java.lang.Daemons"; 719 } 720 721 VLOG(startup) << "Runtime::StartDaemonThreads exiting"; 722} 723 724static bool OpenDexFilesFromImage(const std::string& image_location, 725 std::vector<std::unique_ptr<const DexFile>>* dex_files, 726 size_t* failures) { 727 DCHECK(dex_files != nullptr) << "OpenDexFilesFromImage: out-param is nullptr"; 728 std::string system_filename; 729 bool has_system = false; 730 std::string cache_filename_unused; 731 bool dalvik_cache_exists_unused; 732 bool has_cache_unused; 733 bool is_global_cache_unused; 734 bool found_image = gc::space::ImageSpace::FindImageFilename(image_location.c_str(), 735 kRuntimeISA, 736 &system_filename, 737 &has_system, 738 &cache_filename_unused, 739 &dalvik_cache_exists_unused, 740 &has_cache_unused, 741 &is_global_cache_unused); 742 *failures = 0; 743 if (!found_image || !has_system) { 744 return false; 745 } 746 std::string error_msg; 747 // We are falling back to non-executable use of the oat file because patching failed, presumably 748 // due to lack of space. 749 std::string oat_filename = ImageHeader::GetOatLocationFromImageLocation(system_filename.c_str()); 750 std::string oat_location = ImageHeader::GetOatLocationFromImageLocation(image_location.c_str()); 751 std::unique_ptr<File> file(OS::OpenFileForReading(oat_filename.c_str())); 752 if (file.get() == nullptr) { 753 return false; 754 } 755 std::unique_ptr<ElfFile> elf_file(ElfFile::Open(file.release(), false, false, &error_msg)); 756 if (elf_file.get() == nullptr) { 757 return false; 758 } 759 std::unique_ptr<OatFile> oat_file(OatFile::OpenWithElfFile(elf_file.release(), oat_location, 760 nullptr, &error_msg)); 761 if (oat_file.get() == nullptr) { 762 LOG(INFO) << "Unable to use '" << oat_filename << "' because " << error_msg; 763 return false; 764 } 765 766 for (const OatFile::OatDexFile* oat_dex_file : oat_file->GetOatDexFiles()) { 767 if (oat_dex_file == nullptr) { 768 *failures += 1; 769 continue; 770 } 771 std::unique_ptr<const DexFile> dex_file = oat_dex_file->OpenDexFile(&error_msg); 772 if (dex_file.get() == nullptr) { 773 *failures += 1; 774 } else { 775 dex_files->push_back(std::move(dex_file)); 776 } 777 } 778 Runtime::Current()->GetClassLinker()->RegisterOatFile(oat_file.release()); 779 return true; 780} 781 782 783static size_t OpenDexFiles(const std::vector<std::string>& dex_filenames, 784 const std::vector<std::string>& dex_locations, 785 const std::string& image_location, 786 std::vector<std::unique_ptr<const DexFile>>* dex_files) { 787 DCHECK(dex_files != nullptr) << "OpenDexFiles: out-param is nullptr"; 788 size_t failure_count = 0; 789 if (!image_location.empty() && OpenDexFilesFromImage(image_location, dex_files, &failure_count)) { 790 return failure_count; 791 } 792 failure_count = 0; 793 for (size_t i = 0; i < dex_filenames.size(); i++) { 794 const char* dex_filename = dex_filenames[i].c_str(); 795 const char* dex_location = dex_locations[i].c_str(); 796 std::string error_msg; 797 if (!OS::FileExists(dex_filename)) { 798 LOG(WARNING) << "Skipping non-existent dex file '" << dex_filename << "'"; 799 continue; 800 } 801 if (!DexFile::Open(dex_filename, dex_location, &error_msg, dex_files)) { 802 LOG(WARNING) << "Failed to open .dex from file '" << dex_filename << "': " << error_msg; 803 ++failure_count; 804 } 805 } 806 return failure_count; 807} 808 809void Runtime::SetSentinel(mirror::Object* sentinel) { 810 CHECK(sentinel_.Read() == nullptr); 811 CHECK(sentinel != nullptr); 812 sentinel_ = GcRoot<mirror::Object>(sentinel); 813} 814 815bool Runtime::Init(const RuntimeOptions& raw_options, bool ignore_unrecognized) { 816 ATRACE_BEGIN("Runtime::Init"); 817 CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize); 818 819 MemMap::Init(); 820 821 using Opt = RuntimeArgumentMap; 822 RuntimeArgumentMap runtime_options; 823 std::unique_ptr<ParsedOptions> parsed_options( 824 ParsedOptions::Create(raw_options, ignore_unrecognized, &runtime_options)); 825 if (parsed_options.get() == nullptr) { 826 LOG(ERROR) << "Failed to parse options"; 827 ATRACE_END(); 828 return false; 829 } 830 VLOG(startup) << "Runtime::Init -verbose:startup enabled"; 831 832 QuasiAtomic::Startup(); 833 834 Monitor::Init(runtime_options.GetOrDefault(Opt::LockProfThreshold), 835 runtime_options.GetOrDefault(Opt::HookIsSensitiveThread)); 836 837 boot_class_path_string_ = runtime_options.ReleaseOrDefault(Opt::BootClassPath); 838 class_path_string_ = runtime_options.ReleaseOrDefault(Opt::ClassPath); 839 properties_ = runtime_options.ReleaseOrDefault(Opt::PropertiesList); 840 841 compiler_callbacks_ = runtime_options.GetOrDefault(Opt::CompilerCallbacksPtr); 842 patchoat_executable_ = runtime_options.ReleaseOrDefault(Opt::PatchOat); 843 must_relocate_ = runtime_options.GetOrDefault(Opt::Relocate); 844 is_zygote_ = runtime_options.Exists(Opt::Zygote); 845 is_explicit_gc_disabled_ = runtime_options.Exists(Opt::DisableExplicitGC); 846 dex2oat_enabled_ = runtime_options.GetOrDefault(Opt::Dex2Oat); 847 image_dex2oat_enabled_ = runtime_options.GetOrDefault(Opt::ImageDex2Oat); 848 849 vfprintf_ = runtime_options.GetOrDefault(Opt::HookVfprintf); 850 exit_ = runtime_options.GetOrDefault(Opt::HookExit); 851 abort_ = runtime_options.GetOrDefault(Opt::HookAbort); 852 853 default_stack_size_ = runtime_options.GetOrDefault(Opt::StackSize); 854 stack_trace_file_ = runtime_options.ReleaseOrDefault(Opt::StackTraceFile); 855 856 compiler_executable_ = runtime_options.ReleaseOrDefault(Opt::Compiler); 857 compiler_options_ = runtime_options.ReleaseOrDefault(Opt::CompilerOptions); 858 image_compiler_options_ = runtime_options.ReleaseOrDefault(Opt::ImageCompilerOptions); 859 image_location_ = runtime_options.GetOrDefault(Opt::Image); 860 861 max_spins_before_thin_lock_inflation_ = 862 runtime_options.GetOrDefault(Opt::MaxSpinsBeforeThinLockInflation); 863 864 monitor_list_ = new MonitorList; 865 monitor_pool_ = MonitorPool::Create(); 866 thread_list_ = new ThreadList; 867 intern_table_ = new InternTable; 868 869 verify_ = runtime_options.GetOrDefault(Opt::Verify); 870 allow_dex_file_fallback_ = !runtime_options.Exists(Opt::NoDexFileFallback); 871 872 no_sig_chain_ = runtime_options.Exists(Opt::NoSigChain); 873 874 Split(runtime_options.GetOrDefault(Opt::CpuAbiList), ',', &cpu_abilist_); 875 876 fingerprint_ = runtime_options.ReleaseOrDefault(Opt::Fingerprint); 877 878 if (runtime_options.GetOrDefault(Opt::Interpret)) { 879 GetInstrumentation()->ForceInterpretOnly(); 880 } 881 882 zygote_max_failed_boots_ = runtime_options.GetOrDefault(Opt::ZygoteMaxFailedBoots); 883 experimental_lambdas_ = runtime_options.GetOrDefault(Opt::ExperimentalLambdas); 884 885 XGcOption xgc_option = runtime_options.GetOrDefault(Opt::GcOption); 886 ATRACE_BEGIN("CreateHeap"); 887 heap_ = new gc::Heap(runtime_options.GetOrDefault(Opt::MemoryInitialSize), 888 runtime_options.GetOrDefault(Opt::HeapGrowthLimit), 889 runtime_options.GetOrDefault(Opt::HeapMinFree), 890 runtime_options.GetOrDefault(Opt::HeapMaxFree), 891 runtime_options.GetOrDefault(Opt::HeapTargetUtilization), 892 runtime_options.GetOrDefault(Opt::ForegroundHeapGrowthMultiplier), 893 runtime_options.GetOrDefault(Opt::MemoryMaximumSize), 894 runtime_options.GetOrDefault(Opt::NonMovingSpaceCapacity), 895 runtime_options.GetOrDefault(Opt::Image), 896 runtime_options.GetOrDefault(Opt::ImageInstructionSet), 897 xgc_option.collector_type_, 898 runtime_options.GetOrDefault(Opt::BackgroundGc), 899 runtime_options.GetOrDefault(Opt::LargeObjectSpace), 900 runtime_options.GetOrDefault(Opt::LargeObjectThreshold), 901 runtime_options.GetOrDefault(Opt::ParallelGCThreads), 902 runtime_options.GetOrDefault(Opt::ConcGCThreads), 903 runtime_options.Exists(Opt::LowMemoryMode), 904 runtime_options.GetOrDefault(Opt::LongPauseLogThreshold), 905 runtime_options.GetOrDefault(Opt::LongGCLogThreshold), 906 runtime_options.Exists(Opt::IgnoreMaxFootprint), 907 runtime_options.GetOrDefault(Opt::UseTLAB), 908 xgc_option.verify_pre_gc_heap_, 909 xgc_option.verify_pre_sweeping_heap_, 910 xgc_option.verify_post_gc_heap_, 911 xgc_option.verify_pre_gc_rosalloc_, 912 xgc_option.verify_pre_sweeping_rosalloc_, 913 xgc_option.verify_post_gc_rosalloc_, 914 xgc_option.gcstress_, 915 runtime_options.GetOrDefault(Opt::EnableHSpaceCompactForOOM), 916 runtime_options.GetOrDefault(Opt::HSpaceCompactForOOMMinIntervalsMs)); 917 ATRACE_END(); 918 919 if (heap_->GetImageSpace() == nullptr && !allow_dex_file_fallback_) { 920 LOG(ERROR) << "Dex file fallback disabled, cannot continue without image."; 921 ATRACE_END(); 922 return false; 923 } 924 925 dump_gc_performance_on_shutdown_ = runtime_options.Exists(Opt::DumpGCPerformanceOnShutdown); 926 927 if (runtime_options.Exists(Opt::JdwpOptions)) { 928 Dbg::ConfigureJdwp(runtime_options.GetOrDefault(Opt::JdwpOptions)); 929 } 930 931 jit_options_.reset(jit::JitOptions::CreateFromRuntimeArguments(runtime_options)); 932 if (IsAotCompiler()) { 933 // If we are already the compiler at this point, we must be dex2oat. Don't create the jit in 934 // this case. 935 // If runtime_options doesn't have UseJIT set to true then CreateFromRuntimeArguments returns 936 // null and we don't create the jit. 937 jit_options_->SetUseJIT(false); 938 } 939 940 // Allocate a global table of boxed lambda objects <-> closures. 941 lambda_box_table_ = MakeUnique<lambda::BoxTable>(); 942 943 // Use MemMap arena pool for jit, malloc otherwise. Malloc arenas are faster to allocate but 944 // can't be trimmed as easily. 945 const bool use_malloc = IsAotCompiler(); 946 arena_pool_.reset(new ArenaPool(use_malloc, false)); 947 if (IsAotCompiler() && Is64BitInstructionSet(kRuntimeISA)) { 948 // 4gb, no malloc. Explanation in header. 949 low_4gb_arena_pool_.reset(new ArenaPool(false, true)); 950 } 951 linear_alloc_.reset(CreateLinearAlloc()); 952 953 BlockSignals(); 954 InitPlatformSignalHandlers(); 955 956 // Change the implicit checks flags based on runtime architecture. 957 switch (kRuntimeISA) { 958 case kArm: 959 case kThumb2: 960 case kX86: 961 case kArm64: 962 case kX86_64: 963 case kMips: 964 case kMips64: 965 implicit_null_checks_ = true; 966 // Installing stack protection does not play well with valgrind. 967 implicit_so_checks_ = !(RUNNING_ON_MEMORY_TOOL && kMemoryToolIsValgrind); 968 break; 969 default: 970 // Keep the defaults. 971 break; 972 } 973 974 if (!no_sig_chain_) { 975 // Dex2Oat's Runtime does not need the signal chain or the fault handler. 976 977 // Initialize the signal chain so that any calls to sigaction get 978 // correctly routed to the next in the chain regardless of whether we 979 // have claimed the signal or not. 980 InitializeSignalChain(); 981 982 if (implicit_null_checks_ || implicit_so_checks_ || implicit_suspend_checks_) { 983 fault_manager.Init(); 984 985 // These need to be in a specific order. The null point check handler must be 986 // after the suspend check and stack overflow check handlers. 987 // 988 // Note: the instances attach themselves to the fault manager and are handled by it. The manager 989 // will delete the instance on Shutdown(). 990 if (implicit_suspend_checks_) { 991 new SuspensionHandler(&fault_manager); 992 } 993 994 if (implicit_so_checks_) { 995 new StackOverflowHandler(&fault_manager); 996 } 997 998 if (implicit_null_checks_) { 999 new NullPointerHandler(&fault_manager); 1000 } 1001 1002 if (kEnableJavaStackTraceHandler) { 1003 new JavaStackTraceHandler(&fault_manager); 1004 } 1005 } 1006 } 1007 1008 java_vm_ = new JavaVMExt(this, runtime_options); 1009 1010 Thread::Startup(); 1011 1012 // ClassLinker needs an attached thread, but we can't fully attach a thread without creating 1013 // objects. We can't supply a thread group yet; it will be fixed later. Since we are the main 1014 // thread, we do not get a java peer. 1015 Thread* self = Thread::Attach("main", false, nullptr, false); 1016 CHECK_EQ(self->GetThreadId(), ThreadList::kMainThreadId); 1017 CHECK(self != nullptr); 1018 1019 // Set us to runnable so tools using a runtime can allocate and GC by default 1020 self->TransitionFromSuspendedToRunnable(); 1021 1022 // Now we're attached, we can take the heap locks and validate the heap. 1023 GetHeap()->EnableObjectValidation(); 1024 1025 CHECK_GE(GetHeap()->GetContinuousSpaces().size(), 1U); 1026 class_linker_ = new ClassLinker(intern_table_); 1027 if (GetHeap()->HasImageSpace()) { 1028 ATRACE_BEGIN("InitFromImage"); 1029 class_linker_->InitFromImage(); 1030 ATRACE_END(); 1031 if (kIsDebugBuild) { 1032 GetHeap()->GetImageSpace()->VerifyImageAllocations(); 1033 } 1034 if (boot_class_path_string_.empty()) { 1035 // The bootclasspath is not explicitly specified: construct it from the loaded dex files. 1036 const std::vector<const DexFile*>& boot_class_path = GetClassLinker()->GetBootClassPath(); 1037 std::vector<std::string> dex_locations; 1038 dex_locations.reserve(boot_class_path.size()); 1039 for (const DexFile* dex_file : boot_class_path) { 1040 dex_locations.push_back(dex_file->GetLocation()); 1041 } 1042 boot_class_path_string_ = Join(dex_locations, ':'); 1043 } 1044 } else { 1045 std::vector<std::string> dex_filenames; 1046 Split(boot_class_path_string_, ':', &dex_filenames); 1047 1048 std::vector<std::string> dex_locations; 1049 if (!runtime_options.Exists(Opt::BootClassPathLocations)) { 1050 dex_locations = dex_filenames; 1051 } else { 1052 dex_locations = runtime_options.GetOrDefault(Opt::BootClassPathLocations); 1053 CHECK_EQ(dex_filenames.size(), dex_locations.size()); 1054 } 1055 1056 std::vector<std::unique_ptr<const DexFile>> boot_class_path; 1057 OpenDexFiles(dex_filenames, 1058 dex_locations, 1059 runtime_options.GetOrDefault(Opt::Image), 1060 &boot_class_path); 1061 instruction_set_ = runtime_options.GetOrDefault(Opt::ImageInstructionSet); 1062 class_linker_->InitWithoutImage(std::move(boot_class_path)); 1063 1064 // TODO: Should we move the following to InitWithoutImage? 1065 SetInstructionSet(instruction_set_); 1066 for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) { 1067 Runtime::CalleeSaveType type = Runtime::CalleeSaveType(i); 1068 if (!HasCalleeSaveMethod(type)) { 1069 SetCalleeSaveMethod(CreateCalleeSaveMethod(), type); 1070 } 1071 } 1072 } 1073 1074 CHECK(class_linker_ != nullptr); 1075 1076 verifier::MethodVerifier::Init(); 1077 1078 if (runtime_options.Exists(Opt::MethodTrace)) { 1079 trace_config_.reset(new TraceConfig()); 1080 trace_config_->trace_file = runtime_options.ReleaseOrDefault(Opt::MethodTraceFile); 1081 trace_config_->trace_file_size = runtime_options.ReleaseOrDefault(Opt::MethodTraceFileSize); 1082 trace_config_->trace_mode = Trace::TraceMode::kMethodTracing; 1083 trace_config_->trace_output_mode = runtime_options.Exists(Opt::MethodTraceStreaming) ? 1084 Trace::TraceOutputMode::kStreaming : 1085 Trace::TraceOutputMode::kFile; 1086 } 1087 1088 { 1089 auto&& profiler_options = runtime_options.ReleaseOrDefault(Opt::ProfilerOpts); 1090 profile_output_filename_ = profiler_options.output_file_name_; 1091 1092 // TODO: Don't do this, just change ProfilerOptions to include the output file name? 1093 ProfilerOptions other_options( 1094 profiler_options.enabled_, 1095 profiler_options.period_s_, 1096 profiler_options.duration_s_, 1097 profiler_options.interval_us_, 1098 profiler_options.backoff_coefficient_, 1099 profiler_options.start_immediately_, 1100 profiler_options.top_k_threshold_, 1101 profiler_options.top_k_change_threshold_, 1102 profiler_options.profile_type_, 1103 profiler_options.max_stack_depth_); 1104 1105 profiler_options_ = other_options; 1106 } 1107 1108 // TODO: move this to just be an Trace::Start argument 1109 Trace::SetDefaultClockSource(runtime_options.GetOrDefault(Opt::ProfileClock)); 1110 1111 // Pre-allocate an OutOfMemoryError for the double-OOME case. 1112 self->ThrowNewException("Ljava/lang/OutOfMemoryError;", 1113 "OutOfMemoryError thrown while trying to throw OutOfMemoryError; " 1114 "no stack trace available"); 1115 pre_allocated_OutOfMemoryError_ = GcRoot<mirror::Throwable>(self->GetException()); 1116 self->ClearException(); 1117 1118 // Pre-allocate a NoClassDefFoundError for the common case of failing to find a system class 1119 // ahead of checking the application's class loader. 1120 self->ThrowNewException("Ljava/lang/NoClassDefFoundError;", 1121 "Class not found using the boot class loader; no stack trace available"); 1122 pre_allocated_NoClassDefFoundError_ = GcRoot<mirror::Throwable>(self->GetException()); 1123 self->ClearException(); 1124 1125 // Look for a native bridge. 1126 // 1127 // The intended flow here is, in the case of a running system: 1128 // 1129 // Runtime::Init() (zygote): 1130 // LoadNativeBridge -> dlopen from cmd line parameter. 1131 // | 1132 // V 1133 // Runtime::Start() (zygote): 1134 // No-op wrt native bridge. 1135 // | 1136 // | start app 1137 // V 1138 // DidForkFromZygote(action) 1139 // action = kUnload -> dlclose native bridge. 1140 // action = kInitialize -> initialize library 1141 // 1142 // 1143 // The intended flow here is, in the case of a simple dalvikvm call: 1144 // 1145 // Runtime::Init(): 1146 // LoadNativeBridge -> dlopen from cmd line parameter. 1147 // | 1148 // V 1149 // Runtime::Start(): 1150 // DidForkFromZygote(kInitialize) -> try to initialize any native bridge given. 1151 // No-op wrt native bridge. 1152 { 1153 std::string native_bridge_file_name = runtime_options.ReleaseOrDefault(Opt::NativeBridge); 1154 is_native_bridge_loaded_ = LoadNativeBridge(native_bridge_file_name); 1155 } 1156 1157 VLOG(startup) << "Runtime::Init exiting"; 1158 1159 ATRACE_END(); 1160 1161 return true; 1162} 1163 1164void Runtime::InitNativeMethods() { 1165 VLOG(startup) << "Runtime::InitNativeMethods entering"; 1166 Thread* self = Thread::Current(); 1167 JNIEnv* env = self->GetJniEnv(); 1168 1169 // Must be in the kNative state for calling native methods (JNI_OnLoad code). 1170 CHECK_EQ(self->GetState(), kNative); 1171 1172 // First set up JniConstants, which is used by both the runtime's built-in native 1173 // methods and libcore. 1174 JniConstants::init(env); 1175 WellKnownClasses::Init(env); 1176 1177 // Then set up the native methods provided by the runtime itself. 1178 RegisterRuntimeNativeMethods(env); 1179 1180 // Then set up libcore, which is just a regular JNI library with a regular JNI_OnLoad. 1181 // Most JNI libraries can just use System.loadLibrary, but libcore can't because it's 1182 // the library that implements System.loadLibrary! 1183 { 1184 std::string reason; 1185 if (!java_vm_->LoadNativeLibrary(env, "libjavacore.so", nullptr, &reason)) { 1186 LOG(FATAL) << "LoadNativeLibrary failed for \"libjavacore.so\": " << reason; 1187 } 1188 } 1189 1190 // Initialize well known classes that may invoke runtime native methods. 1191 WellKnownClasses::LateInit(env); 1192 1193 VLOG(startup) << "Runtime::InitNativeMethods exiting"; 1194} 1195 1196void Runtime::InitThreadGroups(Thread* self) { 1197 JNIEnvExt* env = self->GetJniEnv(); 1198 ScopedJniEnvLocalRefState env_state(env); 1199 main_thread_group_ = 1200 env->NewGlobalRef(env->GetStaticObjectField( 1201 WellKnownClasses::java_lang_ThreadGroup, 1202 WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup)); 1203 CHECK(main_thread_group_ != nullptr || IsAotCompiler()); 1204 system_thread_group_ = 1205 env->NewGlobalRef(env->GetStaticObjectField( 1206 WellKnownClasses::java_lang_ThreadGroup, 1207 WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup)); 1208 CHECK(system_thread_group_ != nullptr || IsAotCompiler()); 1209} 1210 1211jobject Runtime::GetMainThreadGroup() const { 1212 CHECK(main_thread_group_ != nullptr || IsAotCompiler()); 1213 return main_thread_group_; 1214} 1215 1216jobject Runtime::GetSystemThreadGroup() const { 1217 CHECK(system_thread_group_ != nullptr || IsAotCompiler()); 1218 return system_thread_group_; 1219} 1220 1221jobject Runtime::GetSystemClassLoader() const { 1222 CHECK(system_class_loader_ != nullptr || IsAotCompiler()); 1223 return system_class_loader_; 1224} 1225 1226void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) { 1227 register_dalvik_system_DexFile(env); 1228 register_dalvik_system_VMDebug(env); 1229 register_dalvik_system_VMRuntime(env); 1230 register_dalvik_system_VMStack(env); 1231 register_dalvik_system_ZygoteHooks(env); 1232 register_java_lang_Class(env); 1233 register_java_lang_DexCache(env); 1234 register_java_lang_Object(env); 1235 register_java_lang_ref_FinalizerReference(env); 1236 register_java_lang_reflect_Array(env); 1237 register_java_lang_reflect_Constructor(env); 1238 register_java_lang_reflect_Field(env); 1239 register_java_lang_reflect_Method(env); 1240 register_java_lang_reflect_Proxy(env); 1241 register_java_lang_ref_Reference(env); 1242 register_java_lang_Runtime(env); 1243 register_java_lang_String(env); 1244 register_java_lang_StringFactory(env); 1245 register_java_lang_System(env); 1246 register_java_lang_Thread(env); 1247 register_java_lang_Throwable(env); 1248 register_java_lang_VMClassLoader(env); 1249 register_java_util_concurrent_atomic_AtomicLong(env); 1250 register_libcore_util_CharsetUtils(env); 1251 register_org_apache_harmony_dalvik_ddmc_DdmServer(env); 1252 register_org_apache_harmony_dalvik_ddmc_DdmVmInternal(env); 1253 register_sun_misc_Unsafe(env); 1254} 1255 1256void Runtime::DumpForSigQuit(std::ostream& os) { 1257 GetClassLinker()->DumpForSigQuit(os); 1258 GetInternTable()->DumpForSigQuit(os); 1259 GetJavaVM()->DumpForSigQuit(os); 1260 GetHeap()->DumpForSigQuit(os); 1261 TrackedAllocators::Dump(os); 1262 os << "\n"; 1263 1264 thread_list_->DumpForSigQuit(os); 1265 BaseMutex::DumpAll(os); 1266} 1267 1268void Runtime::DumpLockHolders(std::ostream& os) { 1269 uint64_t mutator_lock_owner = Locks::mutator_lock_->GetExclusiveOwnerTid(); 1270 pid_t thread_list_lock_owner = GetThreadList()->GetLockOwner(); 1271 pid_t classes_lock_owner = GetClassLinker()->GetClassesLockOwner(); 1272 pid_t dex_lock_owner = GetClassLinker()->GetDexLockOwner(); 1273 if ((thread_list_lock_owner | classes_lock_owner | dex_lock_owner) != 0) { 1274 os << "Mutator lock exclusive owner tid: " << mutator_lock_owner << "\n" 1275 << "ThreadList lock owner tid: " << thread_list_lock_owner << "\n" 1276 << "ClassLinker classes lock owner tid: " << classes_lock_owner << "\n" 1277 << "ClassLinker dex lock owner tid: " << dex_lock_owner << "\n"; 1278 } 1279} 1280 1281void Runtime::SetStatsEnabled(bool new_state) { 1282 Thread* self = Thread::Current(); 1283 MutexLock mu(self, *Locks::instrument_entrypoints_lock_); 1284 if (new_state == true) { 1285 GetStats()->Clear(~0); 1286 // TODO: wouldn't it make more sense to clear _all_ threads' stats? 1287 self->GetStats()->Clear(~0); 1288 if (stats_enabled_ != new_state) { 1289 GetInstrumentation()->InstrumentQuickAllocEntryPointsLocked(); 1290 } 1291 } else if (stats_enabled_ != new_state) { 1292 GetInstrumentation()->UninstrumentQuickAllocEntryPointsLocked(); 1293 } 1294 stats_enabled_ = new_state; 1295} 1296 1297void Runtime::ResetStats(int kinds) { 1298 GetStats()->Clear(kinds & 0xffff); 1299 // TODO: wouldn't it make more sense to clear _all_ threads' stats? 1300 Thread::Current()->GetStats()->Clear(kinds >> 16); 1301} 1302 1303int32_t Runtime::GetStat(int kind) { 1304 RuntimeStats* stats; 1305 if (kind < (1<<16)) { 1306 stats = GetStats(); 1307 } else { 1308 stats = Thread::Current()->GetStats(); 1309 kind >>= 16; 1310 } 1311 switch (kind) { 1312 case KIND_ALLOCATED_OBJECTS: 1313 return stats->allocated_objects; 1314 case KIND_ALLOCATED_BYTES: 1315 return stats->allocated_bytes; 1316 case KIND_FREED_OBJECTS: 1317 return stats->freed_objects; 1318 case KIND_FREED_BYTES: 1319 return stats->freed_bytes; 1320 case KIND_GC_INVOCATIONS: 1321 return stats->gc_for_alloc_count; 1322 case KIND_CLASS_INIT_COUNT: 1323 return stats->class_init_count; 1324 case KIND_CLASS_INIT_TIME: 1325 // Convert ns to us, reduce to 32 bits. 1326 return static_cast<int>(stats->class_init_time_ns / 1000); 1327 case KIND_EXT_ALLOCATED_OBJECTS: 1328 case KIND_EXT_ALLOCATED_BYTES: 1329 case KIND_EXT_FREED_OBJECTS: 1330 case KIND_EXT_FREED_BYTES: 1331 return 0; // backward compatibility 1332 default: 1333 LOG(FATAL) << "Unknown statistic " << kind; 1334 return -1; // unreachable 1335 } 1336} 1337 1338void Runtime::BlockSignals() { 1339 SignalSet signals; 1340 signals.Add(SIGPIPE); 1341 // SIGQUIT is used to dump the runtime's state (including stack traces). 1342 signals.Add(SIGQUIT); 1343 // SIGUSR1 is used to initiate a GC. 1344 signals.Add(SIGUSR1); 1345 signals.Block(); 1346} 1347 1348bool Runtime::AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group, 1349 bool create_peer) { 1350 return Thread::Attach(thread_name, as_daemon, thread_group, create_peer) != nullptr; 1351} 1352 1353void Runtime::DetachCurrentThread() { 1354 Thread* self = Thread::Current(); 1355 if (self == nullptr) { 1356 LOG(FATAL) << "attempting to detach thread that is not attached"; 1357 } 1358 if (self->HasManagedStack()) { 1359 LOG(FATAL) << *Thread::Current() << " attempting to detach while still running code"; 1360 } 1361 thread_list_->Unregister(self); 1362} 1363 1364mirror::Throwable* Runtime::GetPreAllocatedOutOfMemoryError() { 1365 mirror::Throwable* oome = pre_allocated_OutOfMemoryError_.Read(); 1366 if (oome == nullptr) { 1367 LOG(ERROR) << "Failed to return pre-allocated OOME"; 1368 } 1369 return oome; 1370} 1371 1372mirror::Throwable* Runtime::GetPreAllocatedNoClassDefFoundError() { 1373 mirror::Throwable* ncdfe = pre_allocated_NoClassDefFoundError_.Read(); 1374 if (ncdfe == nullptr) { 1375 LOG(ERROR) << "Failed to return pre-allocated NoClassDefFoundError"; 1376 } 1377 return ncdfe; 1378} 1379 1380void Runtime::VisitConstantRoots(RootVisitor* visitor) { 1381 // Visit the classes held as static in mirror classes, these can be visited concurrently and only 1382 // need to be visited once per GC since they never change. 1383 mirror::Class::VisitRoots(visitor); 1384 mirror::Constructor::VisitRoots(visitor); 1385 mirror::Reference::VisitRoots(visitor); 1386 mirror::Method::VisitRoots(visitor); 1387 mirror::StackTraceElement::VisitRoots(visitor); 1388 mirror::String::VisitRoots(visitor); 1389 mirror::Throwable::VisitRoots(visitor); 1390 mirror::Field::VisitRoots(visitor); 1391 // Visit all the primitive array types classes. 1392 mirror::PrimitiveArray<uint8_t>::VisitRoots(visitor); // BooleanArray 1393 mirror::PrimitiveArray<int8_t>::VisitRoots(visitor); // ByteArray 1394 mirror::PrimitiveArray<uint16_t>::VisitRoots(visitor); // CharArray 1395 mirror::PrimitiveArray<double>::VisitRoots(visitor); // DoubleArray 1396 mirror::PrimitiveArray<float>::VisitRoots(visitor); // FloatArray 1397 mirror::PrimitiveArray<int32_t>::VisitRoots(visitor); // IntArray 1398 mirror::PrimitiveArray<int64_t>::VisitRoots(visitor); // LongArray 1399 mirror::PrimitiveArray<int16_t>::VisitRoots(visitor); // ShortArray 1400 // Visiting the roots of these ArtMethods is not currently required since all the GcRoots are 1401 // null. 1402 BufferedRootVisitor<16> buffered_visitor(visitor, RootInfo(kRootVMInternal)); 1403 const size_t pointer_size = GetClassLinker()->GetImagePointerSize(); 1404 if (HasResolutionMethod()) { 1405 resolution_method_->VisitRoots(buffered_visitor, pointer_size); 1406 } 1407 if (HasImtConflictMethod()) { 1408 imt_conflict_method_->VisitRoots(buffered_visitor, pointer_size); 1409 } 1410 if (imt_unimplemented_method_ != nullptr) { 1411 imt_unimplemented_method_->VisitRoots(buffered_visitor, pointer_size); 1412 } 1413 for (size_t i = 0; i < kLastCalleeSaveType; ++i) { 1414 auto* m = reinterpret_cast<ArtMethod*>(callee_save_methods_[i]); 1415 if (m != nullptr) { 1416 m->VisitRoots(buffered_visitor, pointer_size); 1417 } 1418 } 1419} 1420 1421void Runtime::VisitConcurrentRoots(RootVisitor* visitor, VisitRootFlags flags) { 1422 intern_table_->VisitRoots(visitor, flags); 1423 class_linker_->VisitRoots(visitor, flags); 1424 heap_->VisitAllocationRecords(visitor); 1425 if ((flags & kVisitRootFlagNewRoots) == 0) { 1426 // Guaranteed to have no new roots in the constant roots. 1427 VisitConstantRoots(visitor); 1428 } 1429} 1430 1431void Runtime::VisitTransactionRoots(RootVisitor* visitor) { 1432 if (preinitialization_transaction_ != nullptr) { 1433 preinitialization_transaction_->VisitRoots(visitor); 1434 } 1435} 1436 1437void Runtime::VisitNonThreadRoots(RootVisitor* visitor) { 1438 java_vm_->VisitRoots(visitor); 1439 sentinel_.VisitRootIfNonNull(visitor, RootInfo(kRootVMInternal)); 1440 pre_allocated_OutOfMemoryError_.VisitRootIfNonNull(visitor, RootInfo(kRootVMInternal)); 1441 pre_allocated_NoClassDefFoundError_.VisitRootIfNonNull(visitor, RootInfo(kRootVMInternal)); 1442 verifier::MethodVerifier::VisitStaticRoots(visitor); 1443 VisitTransactionRoots(visitor); 1444} 1445 1446void Runtime::VisitNonConcurrentRoots(RootVisitor* visitor) { 1447 thread_list_->VisitRoots(visitor); 1448 VisitNonThreadRoots(visitor); 1449} 1450 1451void Runtime::VisitThreadRoots(RootVisitor* visitor) { 1452 thread_list_->VisitRoots(visitor); 1453} 1454 1455size_t Runtime::FlipThreadRoots(Closure* thread_flip_visitor, Closure* flip_callback, 1456 gc::collector::GarbageCollector* collector) { 1457 return thread_list_->FlipThreadRoots(thread_flip_visitor, flip_callback, collector); 1458} 1459 1460void Runtime::VisitRoots(RootVisitor* visitor, VisitRootFlags flags) { 1461 VisitNonConcurrentRoots(visitor); 1462 VisitConcurrentRoots(visitor, flags); 1463} 1464 1465void Runtime::VisitImageRoots(RootVisitor* visitor) { 1466 for (auto* space : GetHeap()->GetContinuousSpaces()) { 1467 if (space->IsImageSpace()) { 1468 auto* image_space = space->AsImageSpace(); 1469 const auto& image_header = image_space->GetImageHeader(); 1470 for (size_t i = 0; i < ImageHeader::kImageRootsMax; ++i) { 1471 auto* obj = image_header.GetImageRoot(static_cast<ImageHeader::ImageRoot>(i)); 1472 if (obj != nullptr) { 1473 auto* after_obj = obj; 1474 visitor->VisitRoot(&after_obj, RootInfo(kRootStickyClass)); 1475 CHECK_EQ(after_obj, obj); 1476 } 1477 } 1478 } 1479 } 1480} 1481 1482ArtMethod* Runtime::CreateImtConflictMethod() { 1483 auto* method = Runtime::Current()->GetClassLinker()->CreateRuntimeMethod(); 1484 // When compiling, the code pointer will get set later when the image is loaded. 1485 if (IsAotCompiler()) { 1486 size_t pointer_size = GetInstructionSetPointerSize(instruction_set_); 1487 method->SetEntryPointFromQuickCompiledCodePtrSize(nullptr, pointer_size); 1488 } else { 1489 method->SetEntryPointFromQuickCompiledCode(GetQuickImtConflictStub()); 1490 } 1491 return method; 1492} 1493 1494void Runtime::SetImtConflictMethod(ArtMethod* method) { 1495 CHECK(method != nullptr); 1496 CHECK(method->IsRuntimeMethod()); 1497 imt_conflict_method_ = method; 1498} 1499 1500ArtMethod* Runtime::CreateResolutionMethod() { 1501 auto* method = Runtime::Current()->GetClassLinker()->CreateRuntimeMethod(); 1502 // When compiling, the code pointer will get set later when the image is loaded. 1503 if (IsAotCompiler()) { 1504 size_t pointer_size = GetInstructionSetPointerSize(instruction_set_); 1505 method->SetEntryPointFromQuickCompiledCodePtrSize(nullptr, pointer_size); 1506 } else { 1507 method->SetEntryPointFromQuickCompiledCode(GetQuickResolutionStub()); 1508 } 1509 return method; 1510} 1511 1512ArtMethod* Runtime::CreateCalleeSaveMethod() { 1513 auto* method = Runtime::Current()->GetClassLinker()->CreateRuntimeMethod(); 1514 size_t pointer_size = GetInstructionSetPointerSize(instruction_set_); 1515 method->SetEntryPointFromQuickCompiledCodePtrSize(nullptr, pointer_size); 1516 DCHECK_NE(instruction_set_, kNone); 1517 DCHECK(method->IsRuntimeMethod()); 1518 return method; 1519} 1520 1521void Runtime::DisallowNewSystemWeaks() { 1522 CHECK(!kUseReadBarrier); 1523 monitor_list_->DisallowNewMonitors(); 1524 intern_table_->ChangeWeakRootState(gc::kWeakRootStateNoReadsOrWrites); 1525 java_vm_->DisallowNewWeakGlobals(); 1526 heap_->DisallowNewAllocationRecords(); 1527 lambda_box_table_->DisallowNewWeakBoxedLambdas(); 1528} 1529 1530void Runtime::AllowNewSystemWeaks() { 1531 CHECK(!kUseReadBarrier); 1532 monitor_list_->AllowNewMonitors(); 1533 intern_table_->ChangeWeakRootState(gc::kWeakRootStateNormal); // TODO: Do this in the sweeping. 1534 java_vm_->AllowNewWeakGlobals(); 1535 heap_->AllowNewAllocationRecords(); 1536 lambda_box_table_->AllowNewWeakBoxedLambdas(); 1537} 1538 1539void Runtime::BroadcastForNewSystemWeaks() { 1540 // This is used for the read barrier case that uses the thread-local 1541 // Thread::GetWeakRefAccessEnabled() flag. 1542 CHECK(kUseReadBarrier); 1543 monitor_list_->BroadcastForNewMonitors(); 1544 intern_table_->BroadcastForNewInterns(); 1545 java_vm_->BroadcastForNewWeakGlobals(); 1546 heap_->BroadcastForNewAllocationRecords(); 1547 lambda_box_table_->BroadcastForNewWeakBoxedLambdas(); 1548} 1549 1550void Runtime::SetInstructionSet(InstructionSet instruction_set) { 1551 instruction_set_ = instruction_set; 1552 if ((instruction_set_ == kThumb2) || (instruction_set_ == kArm)) { 1553 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1554 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1555 callee_save_method_frame_infos_[i] = arm::ArmCalleeSaveMethodFrameInfo(type); 1556 } 1557 } else if (instruction_set_ == kMips) { 1558 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1559 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1560 callee_save_method_frame_infos_[i] = mips::MipsCalleeSaveMethodFrameInfo(type); 1561 } 1562 } else if (instruction_set_ == kMips64) { 1563 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1564 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1565 callee_save_method_frame_infos_[i] = mips64::Mips64CalleeSaveMethodFrameInfo(type); 1566 } 1567 } else if (instruction_set_ == kX86) { 1568 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1569 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1570 callee_save_method_frame_infos_[i] = x86::X86CalleeSaveMethodFrameInfo(type); 1571 } 1572 } else if (instruction_set_ == kX86_64) { 1573 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1574 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1575 callee_save_method_frame_infos_[i] = x86_64::X86_64CalleeSaveMethodFrameInfo(type); 1576 } 1577 } else if (instruction_set_ == kArm64) { 1578 for (int i = 0; i != kLastCalleeSaveType; ++i) { 1579 CalleeSaveType type = static_cast<CalleeSaveType>(i); 1580 callee_save_method_frame_infos_[i] = arm64::Arm64CalleeSaveMethodFrameInfo(type); 1581 } 1582 } else { 1583 UNIMPLEMENTED(FATAL) << instruction_set_; 1584 } 1585} 1586 1587void Runtime::SetCalleeSaveMethod(ArtMethod* method, CalleeSaveType type) { 1588 DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastCalleeSaveType)); 1589 CHECK(method != nullptr); 1590 callee_save_methods_[type] = reinterpret_cast<uintptr_t>(method); 1591} 1592 1593void Runtime::StartProfiler(const char* profile_output_filename) { 1594 profile_output_filename_ = profile_output_filename; 1595 profiler_started_ = 1596 BackgroundMethodSamplingProfiler::Start(profile_output_filename_, profiler_options_); 1597} 1598 1599// Transaction support. 1600void Runtime::EnterTransactionMode(Transaction* transaction) { 1601 DCHECK(IsAotCompiler()); 1602 DCHECK(transaction != nullptr); 1603 DCHECK(!IsActiveTransaction()); 1604 preinitialization_transaction_ = transaction; 1605} 1606 1607void Runtime::ExitTransactionMode() { 1608 DCHECK(IsAotCompiler()); 1609 DCHECK(IsActiveTransaction()); 1610 preinitialization_transaction_ = nullptr; 1611} 1612 1613bool Runtime::IsTransactionAborted() const { 1614 if (!IsActiveTransaction()) { 1615 return false; 1616 } else { 1617 DCHECK(IsAotCompiler()); 1618 return preinitialization_transaction_->IsAborted(); 1619 } 1620} 1621 1622void Runtime::AbortTransactionAndThrowAbortError(Thread* self, const std::string& abort_message) { 1623 DCHECK(IsAotCompiler()); 1624 DCHECK(IsActiveTransaction()); 1625 // Throwing an exception may cause its class initialization. If we mark the transaction 1626 // aborted before that, we may warn with a false alarm. Throwing the exception before 1627 // marking the transaction aborted avoids that. 1628 preinitialization_transaction_->ThrowAbortError(self, &abort_message); 1629 preinitialization_transaction_->Abort(abort_message); 1630} 1631 1632void Runtime::ThrowTransactionAbortError(Thread* self) { 1633 DCHECK(IsAotCompiler()); 1634 DCHECK(IsActiveTransaction()); 1635 // Passing nullptr means we rethrow an exception with the earlier transaction abort message. 1636 preinitialization_transaction_->ThrowAbortError(self, nullptr); 1637} 1638 1639void Runtime::RecordWriteFieldBoolean(mirror::Object* obj, MemberOffset field_offset, 1640 uint8_t value, bool is_volatile) const { 1641 DCHECK(IsAotCompiler()); 1642 DCHECK(IsActiveTransaction()); 1643 preinitialization_transaction_->RecordWriteFieldBoolean(obj, field_offset, value, is_volatile); 1644} 1645 1646void Runtime::RecordWriteFieldByte(mirror::Object* obj, MemberOffset field_offset, 1647 int8_t value, bool is_volatile) const { 1648 DCHECK(IsAotCompiler()); 1649 DCHECK(IsActiveTransaction()); 1650 preinitialization_transaction_->RecordWriteFieldByte(obj, field_offset, value, is_volatile); 1651} 1652 1653void Runtime::RecordWriteFieldChar(mirror::Object* obj, MemberOffset field_offset, 1654 uint16_t value, bool is_volatile) const { 1655 DCHECK(IsAotCompiler()); 1656 DCHECK(IsActiveTransaction()); 1657 preinitialization_transaction_->RecordWriteFieldChar(obj, field_offset, value, is_volatile); 1658} 1659 1660void Runtime::RecordWriteFieldShort(mirror::Object* obj, MemberOffset field_offset, 1661 int16_t value, bool is_volatile) const { 1662 DCHECK(IsAotCompiler()); 1663 DCHECK(IsActiveTransaction()); 1664 preinitialization_transaction_->RecordWriteFieldShort(obj, field_offset, value, is_volatile); 1665} 1666 1667void Runtime::RecordWriteField32(mirror::Object* obj, MemberOffset field_offset, 1668 uint32_t value, bool is_volatile) const { 1669 DCHECK(IsAotCompiler()); 1670 DCHECK(IsActiveTransaction()); 1671 preinitialization_transaction_->RecordWriteField32(obj, field_offset, value, is_volatile); 1672} 1673 1674void Runtime::RecordWriteField64(mirror::Object* obj, MemberOffset field_offset, 1675 uint64_t value, bool is_volatile) const { 1676 DCHECK(IsAotCompiler()); 1677 DCHECK(IsActiveTransaction()); 1678 preinitialization_transaction_->RecordWriteField64(obj, field_offset, value, is_volatile); 1679} 1680 1681void Runtime::RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset, 1682 mirror::Object* value, bool is_volatile) const { 1683 DCHECK(IsAotCompiler()); 1684 DCHECK(IsActiveTransaction()); 1685 preinitialization_transaction_->RecordWriteFieldReference(obj, field_offset, value, is_volatile); 1686} 1687 1688void Runtime::RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const { 1689 DCHECK(IsAotCompiler()); 1690 DCHECK(IsActiveTransaction()); 1691 preinitialization_transaction_->RecordWriteArray(array, index, value); 1692} 1693 1694void Runtime::RecordStrongStringInsertion(mirror::String* s) const { 1695 DCHECK(IsAotCompiler()); 1696 DCHECK(IsActiveTransaction()); 1697 preinitialization_transaction_->RecordStrongStringInsertion(s); 1698} 1699 1700void Runtime::RecordWeakStringInsertion(mirror::String* s) const { 1701 DCHECK(IsAotCompiler()); 1702 DCHECK(IsActiveTransaction()); 1703 preinitialization_transaction_->RecordWeakStringInsertion(s); 1704} 1705 1706void Runtime::RecordStrongStringRemoval(mirror::String* s) const { 1707 DCHECK(IsAotCompiler()); 1708 DCHECK(IsActiveTransaction()); 1709 preinitialization_transaction_->RecordStrongStringRemoval(s); 1710} 1711 1712void Runtime::RecordWeakStringRemoval(mirror::String* s) const { 1713 DCHECK(IsAotCompiler()); 1714 DCHECK(IsActiveTransaction()); 1715 preinitialization_transaction_->RecordWeakStringRemoval(s); 1716} 1717 1718void Runtime::SetFaultMessage(const std::string& message) { 1719 MutexLock mu(Thread::Current(), fault_message_lock_); 1720 fault_message_ = message; 1721} 1722 1723void Runtime::AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* argv) 1724 const { 1725 if (GetInstrumentation()->InterpretOnly() || UseJit()) { 1726 argv->push_back("--compiler-filter=interpret-only"); 1727 } 1728 1729 // Make the dex2oat instruction set match that of the launching runtime. If we have multiple 1730 // architecture support, dex2oat may be compiled as a different instruction-set than that 1731 // currently being executed. 1732 std::string instruction_set("--instruction-set="); 1733 instruction_set += GetInstructionSetString(kRuntimeISA); 1734 argv->push_back(instruction_set); 1735 1736 std::unique_ptr<const InstructionSetFeatures> features(InstructionSetFeatures::FromCppDefines()); 1737 std::string feature_string("--instruction-set-features="); 1738 feature_string += features->GetFeatureString(); 1739 argv->push_back(feature_string); 1740} 1741 1742void Runtime::UpdateProfilerState(int state) { 1743 VLOG(profiler) << "Profiler state updated to " << state; 1744} 1745 1746void Runtime::CreateJit() { 1747 CHECK(!IsAotCompiler()); 1748 if (GetInstrumentation()->IsForcedInterpretOnly()) { 1749 // Don't create JIT if forced interpret only. 1750 return; 1751 } 1752 std::string error_msg; 1753 jit_.reset(jit::Jit::Create(jit_options_.get(), &error_msg)); 1754 if (jit_.get() != nullptr) { 1755 compiler_callbacks_ = jit_->GetCompilerCallbacks(); 1756 jit_->CreateInstrumentationCache(jit_options_->GetCompileThreshold(), 1757 jit_options_->GetWarmupThreshold()); 1758 jit_->CreateThreadPool(); 1759 } else { 1760 LOG(WARNING) << "Failed to create JIT " << error_msg; 1761 } 1762} 1763 1764bool Runtime::CanRelocate() const { 1765 return !IsAotCompiler() || compiler_callbacks_->IsRelocationPossible(); 1766} 1767 1768bool Runtime::IsCompilingBootImage() const { 1769 return IsCompiler() && compiler_callbacks_->IsBootImage(); 1770} 1771 1772void Runtime::SetResolutionMethod(ArtMethod* method) { 1773 CHECK(method != nullptr); 1774 CHECK(method->IsRuntimeMethod()) << method; 1775 resolution_method_ = method; 1776} 1777 1778void Runtime::SetImtUnimplementedMethod(ArtMethod* method) { 1779 CHECK(method != nullptr); 1780 CHECK(method->IsRuntimeMethod()); 1781 imt_unimplemented_method_ = method; 1782} 1783 1784bool Runtime::IsVerificationEnabled() const { 1785 return verify_ == verifier::VerifyMode::kEnable; 1786} 1787 1788bool Runtime::IsVerificationSoftFail() const { 1789 return verify_ == verifier::VerifyMode::kSoftFail; 1790} 1791 1792LinearAlloc* Runtime::CreateLinearAlloc() { 1793 return (IsAotCompiler() && Is64BitInstructionSet(kRuntimeISA)) 1794 ? new LinearAlloc(low_4gb_arena_pool_.get()) 1795 : new LinearAlloc(arena_pool_.get()); 1796} 1797 1798} // namespace art 1799