runtime.cc revision 4c5a469683e433f126c9863cd393747d2e7c4a29 
1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "runtime.h"
18
19// sys/mount.h has to come before linux/fs.h due to redefinition of MS_RDONLY, MS_BIND, etc
20#include <sys/mount.h>
21#ifdef __linux__
22#include <linux/fs.h>
23#endif
24
25#include <signal.h>
26#include <sys/syscall.h>
27#include <valgrind.h>
28
29#include <cstdio>
30#include <cstdlib>
31#include <limits>
32#include <memory>
33#include <vector>
34#include <fcntl.h>
35
36#include "arch/arm/quick_method_frame_info_arm.h"
37#include "arch/arm/registers_arm.h"
38#include "arch/arm64/quick_method_frame_info_arm64.h"
39#include "arch/arm64/registers_arm64.h"
40#include "arch/mips/quick_method_frame_info_mips.h"
41#include "arch/mips/registers_mips.h"
42#include "arch/x86/quick_method_frame_info_x86.h"
43#include "arch/x86/registers_x86.h"
44#include "arch/x86_64/quick_method_frame_info_x86_64.h"
45#include "arch/x86_64/registers_x86_64.h"
46#include "atomic.h"
47#include "class_linker.h"
48#include "debugger.h"
49#include "fault_handler.h"
50#include "gc/accounting/card_table-inl.h"
51#include "gc/heap.h"
52#include "gc/space/image_space.h"
53#include "gc/space/space.h"
54#include "image.h"
55#include "instrumentation.h"
56#include "intern_table.h"
57#include "jni_internal.h"
58#include "mirror/art_field-inl.h"
59#include "mirror/art_method-inl.h"
60#include "mirror/array.h"
61#include "mirror/class-inl.h"
62#include "mirror/class_loader.h"
63#include "mirror/stack_trace_element.h"
64#include "mirror/throwable.h"
65#include "monitor.h"
66#include "native_bridge_art_interface.h"
67#include "parsed_options.h"
68#include "oat_file.h"
69#include "quick/quick_method_frame_info.h"
70#include "reflection.h"
71#include "ScopedLocalRef.h"
72#include "scoped_thread_state_change.h"
73#include "signal_catcher.h"
74#include "signal_set.h"
75#include "handle_scope-inl.h"
76#include "thread.h"
77#include "thread_list.h"
78#include "trace.h"
79#include "transaction.h"
80#include "profiler.h"
81#include "verifier/method_verifier.h"
82#include "well_known_classes.h"
83
84#include "JniConstants.h"  // Last to avoid LOG redefinition in ics-mr1-plus-art.
85
86#ifdef HAVE_ANDROID_OS
87#include "cutils/properties.h"
88#endif
89
90namespace art {
91
92static constexpr bool kEnableJavaStackTraceHandler = true;
93const char* Runtime::kDefaultInstructionSetFeatures =
94    STRINGIFY(ART_DEFAULT_INSTRUCTION_SET_FEATURES);
95Runtime* Runtime::instance_ = NULL;
96
97Runtime::Runtime()
98    : instruction_set_(kNone),
99      compiler_callbacks_(nullptr),
100      is_zygote_(false),
101      must_relocate_(false),
102      is_concurrent_gc_enabled_(true),
103      is_explicit_gc_disabled_(false),
104      dex2oat_enabled_(true),
105      default_stack_size_(0),
106      heap_(nullptr),
107      max_spins_before_thin_lock_inflation_(Monitor::kDefaultMaxSpinsBeforeThinLockInflation),
108      monitor_list_(nullptr),
109      monitor_pool_(nullptr),
110      thread_list_(nullptr),
111      intern_table_(nullptr),
112      class_linker_(nullptr),
113      signal_catcher_(nullptr),
114      java_vm_(nullptr),
115      fault_message_lock_("Fault message lock"),
116      fault_message_(""),
117      method_verifier_lock_("Method verifiers lock"),
118      threads_being_born_(0),
119      shutdown_cond_(new ConditionVariable("Runtime shutdown", *Locks::runtime_shutdown_lock_)),
120      shutting_down_(false),
121      shutting_down_started_(false),
122      started_(false),
123      finished_starting_(false),
124      vfprintf_(nullptr),
125      exit_(nullptr),
126      abort_(nullptr),
127      stats_enabled_(false),
128      running_on_valgrind_(RUNNING_ON_VALGRIND > 0),
129      profiler_started_(false),
130      method_trace_(false),
131      method_trace_file_size_(0),
132      instrumentation_(),
133      use_compile_time_class_path_(false),
134      main_thread_group_(nullptr),
135      system_thread_group_(nullptr),
136      system_class_loader_(nullptr),
137      dump_gc_performance_on_shutdown_(false),
138      preinitialization_transaction_(nullptr),
139      null_pointer_handler_(nullptr),
140      suspend_handler_(nullptr),
141      stack_overflow_handler_(nullptr),
142      verify_(false),
143      target_sdk_version_(0),
144      implicit_null_checks_(false),
145      implicit_so_checks_(false),
146      implicit_suspend_checks_(false),
147      native_bridge_art_callbacks_({GetMethodShorty, GetNativeMethodCount, GetNativeMethods}) {
148}
149
150Runtime::~Runtime() {
151  if (dump_gc_performance_on_shutdown_) {
152    // This can't be called from the Heap destructor below because it
153    // could call RosAlloc::InspectAll() which needs the thread_list
154    // to be still alive.
155    heap_->DumpGcPerformanceInfo(LOG(INFO));
156  }
157
158  Thread* self = Thread::Current();
159  {
160    MutexLock mu(self, *Locks::runtime_shutdown_lock_);
161    shutting_down_started_ = true;
162    while (threads_being_born_ > 0) {
163      shutdown_cond_->Wait(self);
164    }
165    shutting_down_ = true;
166  }
167  // Shut down background profiler before the runtime exits.
168  if (profiler_started_) {
169    BackgroundMethodSamplingProfiler::Shutdown();
170  }
171
172  // Shutdown the fault manager if it was initialized.
173  fault_manager.Shutdown();
174
175  Trace::Shutdown();
176
177  // Make sure to let the GC complete if it is running.
178  heap_->WaitForGcToComplete(gc::kGcCauseBackground, self);
179  heap_->DeleteThreadPool();
180
181  // Make sure our internal threads are dead before we start tearing down things they're using.
182  Dbg::StopJdwp();
183  delete signal_catcher_;
184
185  // Make sure all other non-daemon threads have terminated, and all daemon threads are suspended.
186  delete thread_list_;
187  delete monitor_list_;
188  delete monitor_pool_;
189  delete class_linker_;
190  delete heap_;
191  delete intern_table_;
192  delete java_vm_;
193  Thread::Shutdown();
194  QuasiAtomic::Shutdown();
195  verifier::MethodVerifier::Shutdown();
196  // TODO: acquire a static mutex on Runtime to avoid racing.
197  CHECK(instance_ == nullptr || instance_ == this);
198  instance_ = nullptr;
199
200  delete null_pointer_handler_;
201  delete suspend_handler_;
202  delete stack_overflow_handler_;
203}
204
205struct AbortState {
206  void Dump(std::ostream& os) NO_THREAD_SAFETY_ANALYSIS {
207    if (gAborting > 1) {
208      os << "Runtime aborting --- recursively, so no thread-specific detail!\n";
209      return;
210    }
211    gAborting++;
212    os << "Runtime aborting...\n";
213    if (Runtime::Current() == NULL) {
214      os << "(Runtime does not yet exist!)\n";
215      return;
216    }
217    Thread* self = Thread::Current();
218    if (self == nullptr) {
219      os << "(Aborting thread was not attached to runtime!)\n";
220      DumpKernelStack(os, GetTid(), "  kernel: ", false);
221      DumpNativeStack(os, GetTid(), "  native: ", nullptr);
222    } else {
223      os << "Aborting thread:\n";
224      if (Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)) {
225        DumpThread(os, self);
226      } else {
227        if (Locks::mutator_lock_->SharedTryLock(self)) {
228          DumpThread(os, self);
229          Locks::mutator_lock_->SharedUnlock(self);
230        }
231      }
232    }
233    DumpAllThreads(os, self);
234  }
235
236  void DumpThread(std::ostream& os, Thread* self) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
237    self->Dump(os);
238    if (self->IsExceptionPending()) {
239      ThrowLocation throw_location;
240      mirror::Throwable* exception = self->GetException(&throw_location);
241      os << "Pending exception " << PrettyTypeOf(exception)
242          << " thrown by '" << throw_location.Dump() << "'\n"
243          << exception->Dump();
244    }
245  }
246
247  void DumpAllThreads(std::ostream& os, Thread* self) NO_THREAD_SAFETY_ANALYSIS {
248    Runtime* runtime = Runtime::Current();
249    if (runtime != nullptr) {
250      ThreadList* thread_list = runtime->GetThreadList();
251      if (thread_list != nullptr) {
252        bool tll_already_held = Locks::thread_list_lock_->IsExclusiveHeld(self);
253        bool ml_already_held = Locks::mutator_lock_->IsSharedHeld(self);
254        if (!tll_already_held || !ml_already_held) {
255          os << "Dumping all threads without appropriate locks held:"
256              << (!tll_already_held ? " thread list lock" : "")
257              << (!ml_already_held ? " mutator lock" : "")
258              << "\n";
259        }
260        os << "All threads:\n";
261        thread_list->DumpLocked(os);
262      }
263    }
264  }
265};
266
267void Runtime::Abort() {
268  gAborting++;  // set before taking any locks
269
270  // Ensure that we don't have multiple threads trying to abort at once,
271  // which would result in significantly worse diagnostics.
272  MutexLock mu(Thread::Current(), *Locks::abort_lock_);
273
274  // Get any pending output out of the way.
275  fflush(NULL);
276
277  // Many people have difficulty distinguish aborts from crashes,
278  // so be explicit.
279  AbortState state;
280  LOG(INTERNAL_FATAL) << Dumpable<AbortState>(state);
281
282  // Call the abort hook if we have one.
283  if (Runtime::Current() != NULL && Runtime::Current()->abort_ != NULL) {
284    LOG(INTERNAL_FATAL) << "Calling abort hook...";
285    Runtime::Current()->abort_();
286    // notreached
287    LOG(INTERNAL_FATAL) << "Unexpectedly returned from abort hook!";
288  }
289
290#if defined(__GLIBC__)
291  // TODO: we ought to be able to use pthread_kill(3) here (or abort(3),
292  // which POSIX defines in terms of raise(3), which POSIX defines in terms
293  // of pthread_kill(3)). On Linux, though, libcorkscrew can't unwind through
294  // libpthread, which means the stacks we dump would be useless. Calling
295  // tgkill(2) directly avoids that.
296  syscall(__NR_tgkill, getpid(), GetTid(), SIGABRT);
297  // TODO: LLVM installs it's own SIGABRT handler so exit to be safe... Can we disable that in LLVM?
298  // If not, we could use sigaction(3) before calling tgkill(2) and lose this call to exit(3).
299  exit(1);
300#else
301  abort();
302#endif
303  // notreached
304}
305
306void Runtime::PreZygoteFork() {
307  heap_->PreZygoteFork();
308}
309
310void Runtime::CallExitHook(jint status) {
311  if (exit_ != NULL) {
312    ScopedThreadStateChange tsc(Thread::Current(), kNative);
313    exit_(status);
314    LOG(WARNING) << "Exit hook returned instead of exiting!";
315  }
316}
317
318void Runtime::SweepSystemWeaks(IsMarkedCallback* visitor, void* arg) {
319  GetInternTable()->SweepInternTableWeaks(visitor, arg);
320  GetMonitorList()->SweepMonitorList(visitor, arg);
321  GetJavaVM()->SweepJniWeakGlobals(visitor, arg);
322}
323
324bool Runtime::Create(const RuntimeOptions& options, bool ignore_unrecognized) {
325  // TODO: acquire a static mutex on Runtime to avoid racing.
326  if (Runtime::instance_ != NULL) {
327    return false;
328  }
329  InitLogging(NULL);  // Calls Locks::Init() as a side effect.
330  instance_ = new Runtime;
331  if (!instance_->Init(options, ignore_unrecognized)) {
332    delete instance_;
333    instance_ = NULL;
334    return false;
335  }
336  return true;
337}
338
339jobject CreateSystemClassLoader() {
340  if (Runtime::Current()->UseCompileTimeClassPath()) {
341    return NULL;
342  }
343
344  ScopedObjectAccess soa(Thread::Current());
345  ClassLinker* cl = Runtime::Current()->GetClassLinker();
346
347  StackHandleScope<3> hs(soa.Self());
348  Handle<mirror::Class> class_loader_class(
349      hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_ClassLoader)));
350  CHECK(cl->EnsureInitialized(class_loader_class, true, true));
351
352  mirror::ArtMethod* getSystemClassLoader =
353      class_loader_class->FindDirectMethod("getSystemClassLoader", "()Ljava/lang/ClassLoader;");
354  CHECK(getSystemClassLoader != NULL);
355
356  JValue result = InvokeWithJValues(soa, nullptr, soa.EncodeMethod(getSystemClassLoader), nullptr);
357  Handle<mirror::ClassLoader> class_loader(
358      hs.NewHandle(down_cast<mirror::ClassLoader*>(result.GetL())));
359  CHECK(class_loader.Get() != nullptr);
360  JNIEnv* env = soa.Self()->GetJniEnv();
361  ScopedLocalRef<jobject> system_class_loader(env,
362                                              soa.AddLocalReference<jobject>(class_loader.Get()));
363  CHECK(system_class_loader.get() != nullptr);
364
365  soa.Self()->SetClassLoaderOverride(class_loader.Get());
366
367  Handle<mirror::Class> thread_class(
368      hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_Thread)));
369  CHECK(cl->EnsureInitialized(thread_class, true, true));
370
371  mirror::ArtField* contextClassLoader =
372      thread_class->FindDeclaredInstanceField("contextClassLoader", "Ljava/lang/ClassLoader;");
373  CHECK(contextClassLoader != NULL);
374
375  // We can't run in a transaction yet.
376  contextClassLoader->SetObject<false>(soa.Self()->GetPeer(), class_loader.Get());
377
378  return env->NewGlobalRef(system_class_loader.get());
379}
380
381std::string Runtime::GetPatchoatExecutable() const {
382  if (!patchoat_executable_.empty()) {
383    return patchoat_executable_;
384  }
385  std::string patchoat_executable_(GetAndroidRoot());
386  patchoat_executable_ += (kIsDebugBuild ? "/bin/patchoatd" : "/bin/patchoat");
387  return patchoat_executable_;
388}
389
390std::string Runtime::GetCompilerExecutable() const {
391  if (!compiler_executable_.empty()) {
392    return compiler_executable_;
393  }
394  std::string compiler_executable(GetAndroidRoot());
395  compiler_executable += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat");
396  return compiler_executable;
397}
398
399bool Runtime::Start() {
400  VLOG(startup) << "Runtime::Start entering";
401
402  // Restore main thread state to kNative as expected by native code.
403  Thread* self = Thread::Current();
404  self->TransitionFromRunnableToSuspended(kNative);
405
406  started_ = true;
407
408  // InitNativeMethods needs to be after started_ so that the classes
409  // it touches will have methods linked to the oat file if necessary.
410  InitNativeMethods();
411
412  // Initialize well known thread group values that may be accessed threads while attaching.
413  InitThreadGroups(self);
414
415  Thread::FinishStartup();
416
417  if (is_zygote_) {
418    if (!InitZygote()) {
419      return false;
420    }
421  } else {
422    DidForkFromZygote();
423  }
424
425  StartDaemonThreads();
426
427  system_class_loader_ = CreateSystemClassLoader();
428
429  {
430    ScopedObjectAccess soa(self);
431    self->GetJniEnv()->locals.AssertEmpty();
432  }
433
434  VLOG(startup) << "Runtime::Start exiting";
435  finished_starting_ = true;
436
437  if (profiler_options_.IsEnabled() && !profile_output_filename_.empty()) {
438    // User has asked for a profile using -Xenable-profiler.
439    // Create the profile file if it doesn't exist.
440    int fd = open(profile_output_filename_.c_str(), O_RDWR|O_CREAT|O_EXCL, 0660);
441    if (fd >= 0) {
442      close(fd);
443    } else if (errno != EEXIST) {
444      LOG(INFO) << "Failed to access the profile file. Profiler disabled.";
445      return true;
446    }
447    StartProfiler(profile_output_filename_.c_str());
448  }
449
450  return true;
451}
452
453void Runtime::EndThreadBirth() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) {
454  DCHECK_GT(threads_being_born_, 0U);
455  threads_being_born_--;
456  if (shutting_down_started_ && threads_being_born_ == 0) {
457    shutdown_cond_->Broadcast(Thread::Current());
458  }
459}
460
461// Do zygote-mode-only initialization.
462bool Runtime::InitZygote() {
463#ifdef __linux__
464  // zygote goes into its own process group
465  setpgid(0, 0);
466
467  // See storage config details at http://source.android.com/tech/storage/
468  // Create private mount namespace shared by all children
469  if (unshare(CLONE_NEWNS) == -1) {
470    PLOG(WARNING) << "Failed to unshare()";
471    return false;
472  }
473
474  // Mark rootfs as being a slave so that changes from default
475  // namespace only flow into our children.
476  if (mount("rootfs", "/", NULL, (MS_SLAVE | MS_REC), NULL) == -1) {
477    PLOG(WARNING) << "Failed to mount() rootfs as MS_SLAVE";
478    return false;
479  }
480
481  // Create a staging tmpfs that is shared by our children; they will
482  // bind mount storage into their respective private namespaces, which
483  // are isolated from each other.
484  const char* target_base = getenv("EMULATED_STORAGE_TARGET");
485  if (target_base != NULL) {
486    if (mount("tmpfs", target_base, "tmpfs", MS_NOSUID | MS_NODEV,
487              "uid=0,gid=1028,mode=0751") == -1) {
488      LOG(WARNING) << "Failed to mount tmpfs to " << target_base;
489      return false;
490    }
491  }
492
493  return true;
494#else
495  UNIMPLEMENTED(FATAL);
496  return false;
497#endif
498}
499
500void Runtime::DidForkFromZygote() {
501  is_zygote_ = false;
502
503  // Create the thread pool.
504  heap_->CreateThreadPool();
505
506  StartSignalCatcher();
507
508  // Start the JDWP thread. If the command-line debugger flags specified "suspend=y",
509  // this will pause the runtime, so we probably want this to come last.
510  Dbg::StartJdwp();
511}
512
513void Runtime::StartSignalCatcher() {
514  if (!is_zygote_) {
515    signal_catcher_ = new SignalCatcher(stack_trace_file_);
516  }
517}
518
519bool Runtime::IsShuttingDown(Thread* self) {
520  MutexLock mu(self, *Locks::runtime_shutdown_lock_);
521  return IsShuttingDownLocked();
522}
523
524void Runtime::StartDaemonThreads() {
525  VLOG(startup) << "Runtime::StartDaemonThreads entering";
526
527  Thread* self = Thread::Current();
528
529  // Must be in the kNative state for calling native methods.
530  CHECK_EQ(self->GetState(), kNative);
531
532  JNIEnv* env = self->GetJniEnv();
533  env->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons,
534                            WellKnownClasses::java_lang_Daemons_start);
535  if (env->ExceptionCheck()) {
536    env->ExceptionDescribe();
537    LOG(FATAL) << "Error starting java.lang.Daemons";
538  }
539
540  VLOG(startup) << "Runtime::StartDaemonThreads exiting";
541}
542
543bool Runtime::Init(const RuntimeOptions& raw_options, bool ignore_unrecognized) {
544  CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize);
545
546  std::unique_ptr<ParsedOptions> options(ParsedOptions::Create(raw_options, ignore_unrecognized));
547  if (options.get() == NULL) {
548    LOG(ERROR) << "Failed to parse options";
549    return false;
550  }
551  VLOG(startup) << "Runtime::Init -verbose:startup enabled";
552
553  QuasiAtomic::Startup();
554
555  Monitor::Init(options->lock_profiling_threshold_, options->hook_is_sensitive_thread_);
556
557  boot_class_path_string_ = options->boot_class_path_string_;
558  class_path_string_ = options->class_path_string_;
559  properties_ = options->properties_;
560
561  compiler_callbacks_ = options->compiler_callbacks_;
562  patchoat_executable_ = options->patchoat_executable_;
563  must_relocate_ = options->must_relocate_;
564  is_zygote_ = options->is_zygote_;
565  is_explicit_gc_disabled_ = options->is_explicit_gc_disabled_;
566  dex2oat_enabled_ = options->dex2oat_enabled_;
567
568  vfprintf_ = options->hook_vfprintf_;
569  exit_ = options->hook_exit_;
570  abort_ = options->hook_abort_;
571
572  default_stack_size_ = options->stack_size_;
573  stack_trace_file_ = options->stack_trace_file_;
574
575  compiler_executable_ = options->compiler_executable_;
576  compiler_options_ = options->compiler_options_;
577  image_compiler_options_ = options->image_compiler_options_;
578
579  max_spins_before_thin_lock_inflation_ = options->max_spins_before_thin_lock_inflation_;
580
581  monitor_list_ = new MonitorList;
582  monitor_pool_ = MonitorPool::Create();
583  thread_list_ = new ThreadList;
584  intern_table_ = new InternTable;
585
586  verify_ = options->verify_;
587
588  if (options->interpreter_only_) {
589    GetInstrumentation()->ForceInterpretOnly();
590  }
591
592  heap_ = new gc::Heap(options->heap_initial_size_,
593                       options->heap_growth_limit_,
594                       options->heap_min_free_,
595                       options->heap_max_free_,
596                       options->heap_target_utilization_,
597                       options->foreground_heap_growth_multiplier_,
598                       options->heap_maximum_size_,
599                       options->heap_non_moving_space_capacity_,
600                       options->image_,
601                       options->image_isa_,
602                       options->collector_type_,
603                       options->background_collector_type_,
604                       options->parallel_gc_threads_,
605                       options->conc_gc_threads_,
606                       options->low_memory_mode_,
607                       options->long_pause_log_threshold_,
608                       options->long_gc_log_threshold_,
609                       options->ignore_max_footprint_,
610                       options->use_tlab_,
611                       options->verify_pre_gc_heap_,
612                       options->verify_pre_sweeping_heap_,
613                       options->verify_post_gc_heap_,
614                       options->verify_pre_gc_rosalloc_,
615                       options->verify_pre_sweeping_rosalloc_,
616                       options->verify_post_gc_rosalloc_,
617                       options->use_homogeneous_space_compaction_for_oom_,
618                       options->min_interval_homogeneous_space_compaction_by_oom_);
619
620  dump_gc_performance_on_shutdown_ = options->dump_gc_performance_on_shutdown_;
621
622  BlockSignals();
623  InitPlatformSignalHandlers();
624
625  // Change the implicit checks flags based on runtime architecture.
626  switch (kRuntimeISA) {
627    case kArm:
628    case kThumb2:
629    case kX86:
630    case kArm64:
631    case kX86_64:
632      implicit_null_checks_ = true;
633      implicit_so_checks_ = true;
634      break;
635    default:
636      // Keep the defaults.
637      break;
638  }
639
640  if (implicit_null_checks_ || implicit_so_checks_ || implicit_suspend_checks_) {
641    fault_manager.Init();
642
643    // These need to be in a specific order.  The null point check handler must be
644    // after the suspend check and stack overflow check handlers.
645    if (implicit_suspend_checks_) {
646      suspend_handler_ = new SuspensionHandler(&fault_manager);
647    }
648
649    if (implicit_so_checks_) {
650      stack_overflow_handler_ = new StackOverflowHandler(&fault_manager);
651    }
652
653    if (implicit_null_checks_) {
654      null_pointer_handler_ = new NullPointerHandler(&fault_manager);
655    }
656
657    if (kEnableJavaStackTraceHandler) {
658      new JavaStackTraceHandler(&fault_manager);
659    }
660  }
661
662  java_vm_ = new JavaVMExt(this, options.get());
663
664  Thread::Startup();
665
666  // ClassLinker needs an attached thread, but we can't fully attach a thread without creating
667  // objects. We can't supply a thread group yet; it will be fixed later. Since we are the main
668  // thread, we do not get a java peer.
669  Thread* self = Thread::Attach("main", false, NULL, false);
670  CHECK_EQ(self->GetThreadId(), ThreadList::kMainThreadId);
671  CHECK(self != NULL);
672
673  // Set us to runnable so tools using a runtime can allocate and GC by default
674  self->TransitionFromSuspendedToRunnable();
675
676  // Now we're attached, we can take the heap locks and validate the heap.
677  GetHeap()->EnableObjectValidation();
678
679  CHECK_GE(GetHeap()->GetContinuousSpaces().size(), 1U);
680  class_linker_ = new ClassLinker(intern_table_);
681  if (GetHeap()->HasImageSpace()) {
682    class_linker_->InitFromImage();
683    if (kIsDebugBuild) {
684      GetHeap()->GetImageSpace()->VerifyImageAllocations();
685    }
686  } else {
687    CHECK(options->boot_class_path_ != NULL);
688    CHECK_NE(options->boot_class_path_->size(), 0U);
689    class_linker_->InitFromCompiler(*options->boot_class_path_);
690  }
691  CHECK(class_linker_ != NULL);
692  verifier::MethodVerifier::Init();
693
694  method_trace_ = options->method_trace_;
695  method_trace_file_ = options->method_trace_file_;
696  method_trace_file_size_ = options->method_trace_file_size_;
697
698  profile_output_filename_ = options->profile_output_filename_;
699  profiler_options_ = options->profiler_options_;
700
701  // TODO: move this to just be an Trace::Start argument
702  Trace::SetDefaultClockSource(options->profile_clock_source_);
703
704  if (options->method_trace_) {
705    ScopedThreadStateChange tsc(self, kWaitingForMethodTracingStart);
706    Trace::Start(options->method_trace_file_.c_str(), -1, options->method_trace_file_size_, 0,
707                 false, false, 0);
708  }
709
710  // Pre-allocate an OutOfMemoryError for the double-OOME case.
711  self->ThrowNewException(ThrowLocation(), "Ljava/lang/OutOfMemoryError;",
712                          "OutOfMemoryError thrown while trying to throw OutOfMemoryError; "
713                          "no stack available");
714  pre_allocated_OutOfMemoryError_ = GcRoot<mirror::Throwable>(self->GetException(NULL));
715  self->ClearException();
716
717  // Look for a native bridge.
718  native_bridge_library_filename_ = options->native_bridge_library_filename_;
719  android::SetupNativeBridge(native_bridge_library_filename_.c_str(), &native_bridge_art_callbacks_);
720  VLOG(startup) << "Runtime::Setup native bridge library: "
721                << (native_bridge_library_filename_.empty() ?
722                    "(empty)" : native_bridge_library_filename_);
723
724  VLOG(startup) << "Runtime::Init exiting";
725  return true;
726}
727
728void Runtime::InitNativeMethods() {
729  VLOG(startup) << "Runtime::InitNativeMethods entering";
730  Thread* self = Thread::Current();
731  JNIEnv* env = self->GetJniEnv();
732
733  // Must be in the kNative state for calling native methods (JNI_OnLoad code).
734  CHECK_EQ(self->GetState(), kNative);
735
736  // First set up JniConstants, which is used by both the runtime's built-in native
737  // methods and libcore.
738  JniConstants::init(env);
739  WellKnownClasses::Init(env);
740
741  // Then set up the native methods provided by the runtime itself.
742  RegisterRuntimeNativeMethods(env);
743
744  // Then set up libcore, which is just a regular JNI library with a regular JNI_OnLoad.
745  // Most JNI libraries can just use System.loadLibrary, but libcore can't because it's
746  // the library that implements System.loadLibrary!
747  {
748    std::string mapped_name(StringPrintf(OS_SHARED_LIB_FORMAT_STR, "javacore"));
749    std::string reason;
750    self->TransitionFromSuspendedToRunnable();
751    StackHandleScope<1> hs(self);
752    auto class_loader(hs.NewHandle<mirror::ClassLoader>(nullptr));
753    if (!instance_->java_vm_->LoadNativeLibrary(mapped_name, class_loader, &reason)) {
754      LOG(FATAL) << "LoadNativeLibrary failed for \"" << mapped_name << "\": " << reason;
755    }
756    self->TransitionFromRunnableToSuspended(kNative);
757  }
758
759  // Initialize well known classes that may invoke runtime native methods.
760  WellKnownClasses::LateInit(env);
761
762  VLOG(startup) << "Runtime::InitNativeMethods exiting";
763}
764
765void Runtime::InitThreadGroups(Thread* self) {
766  JNIEnvExt* env = self->GetJniEnv();
767  ScopedJniEnvLocalRefState env_state(env);
768  main_thread_group_ =
769      env->NewGlobalRef(env->GetStaticObjectField(
770          WellKnownClasses::java_lang_ThreadGroup,
771          WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup));
772  CHECK(main_thread_group_ != NULL || IsCompiler());
773  system_thread_group_ =
774      env->NewGlobalRef(env->GetStaticObjectField(
775          WellKnownClasses::java_lang_ThreadGroup,
776          WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup));
777  CHECK(system_thread_group_ != NULL || IsCompiler());
778}
779
780jobject Runtime::GetMainThreadGroup() const {
781  CHECK(main_thread_group_ != NULL || IsCompiler());
782  return main_thread_group_;
783}
784
785jobject Runtime::GetSystemThreadGroup() const {
786  CHECK(system_thread_group_ != NULL || IsCompiler());
787  return system_thread_group_;
788}
789
790jobject Runtime::GetSystemClassLoader() const {
791  CHECK(system_class_loader_ != NULL || IsCompiler());
792  return system_class_loader_;
793}
794
795void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) {
796#define REGISTER(FN) extern void FN(JNIEnv*); FN(env)
797  // Register Throwable first so that registration of other native methods can throw exceptions
798  REGISTER(register_java_lang_Throwable);
799  REGISTER(register_dalvik_system_DexFile);
800  REGISTER(register_dalvik_system_VMDebug);
801  REGISTER(register_dalvik_system_VMRuntime);
802  REGISTER(register_dalvik_system_VMStack);
803  REGISTER(register_dalvik_system_ZygoteHooks);
804  REGISTER(register_java_lang_Class);
805  REGISTER(register_java_lang_DexCache);
806  REGISTER(register_java_lang_Object);
807  REGISTER(register_java_lang_Runtime);
808  REGISTER(register_java_lang_String);
809  REGISTER(register_java_lang_System);
810  REGISTER(register_java_lang_Thread);
811  REGISTER(register_java_lang_VMClassLoader);
812  REGISTER(register_java_lang_ref_Reference);
813  REGISTER(register_java_lang_reflect_Array);
814  REGISTER(register_java_lang_reflect_Constructor);
815  REGISTER(register_java_lang_reflect_Field);
816  REGISTER(register_java_lang_reflect_Method);
817  REGISTER(register_java_lang_reflect_Proxy);
818  REGISTER(register_java_util_concurrent_atomic_AtomicLong);
819  REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmServer);
820  REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmVmInternal);
821  REGISTER(register_sun_misc_Unsafe);
822#undef REGISTER
823}
824
825void Runtime::DumpForSigQuit(std::ostream& os) {
826  GetClassLinker()->DumpForSigQuit(os);
827  GetInternTable()->DumpForSigQuit(os);
828  GetJavaVM()->DumpForSigQuit(os);
829  GetHeap()->DumpForSigQuit(os);
830  os << "\n";
831
832  thread_list_->DumpForSigQuit(os);
833  BaseMutex::DumpAll(os);
834}
835
836void Runtime::DumpLockHolders(std::ostream& os) {
837  uint64_t mutator_lock_owner = Locks::mutator_lock_->GetExclusiveOwnerTid();
838  pid_t thread_list_lock_owner = GetThreadList()->GetLockOwner();
839  pid_t classes_lock_owner = GetClassLinker()->GetClassesLockOwner();
840  pid_t dex_lock_owner = GetClassLinker()->GetDexLockOwner();
841  if ((thread_list_lock_owner | classes_lock_owner | dex_lock_owner) != 0) {
842    os << "Mutator lock exclusive owner tid: " << mutator_lock_owner << "\n"
843       << "ThreadList lock owner tid: " << thread_list_lock_owner << "\n"
844       << "ClassLinker classes lock owner tid: " << classes_lock_owner << "\n"
845       << "ClassLinker dex lock owner tid: " << dex_lock_owner << "\n";
846  }
847}
848
849void Runtime::SetStatsEnabled(bool new_state) {
850  if (new_state == true) {
851    GetStats()->Clear(~0);
852    // TODO: wouldn't it make more sense to clear _all_ threads' stats?
853    Thread::Current()->GetStats()->Clear(~0);
854    GetInstrumentation()->InstrumentQuickAllocEntryPoints();
855  } else {
856    GetInstrumentation()->UninstrumentQuickAllocEntryPoints();
857  }
858  stats_enabled_ = new_state;
859}
860
861void Runtime::ResetStats(int kinds) {
862  GetStats()->Clear(kinds & 0xffff);
863  // TODO: wouldn't it make more sense to clear _all_ threads' stats?
864  Thread::Current()->GetStats()->Clear(kinds >> 16);
865}
866
867int32_t Runtime::GetStat(int kind) {
868  RuntimeStats* stats;
869  if (kind < (1<<16)) {
870    stats = GetStats();
871  } else {
872    stats = Thread::Current()->GetStats();
873    kind >>= 16;
874  }
875  switch (kind) {
876  case KIND_ALLOCATED_OBJECTS:
877    return stats->allocated_objects;
878  case KIND_ALLOCATED_BYTES:
879    return stats->allocated_bytes;
880  case KIND_FREED_OBJECTS:
881    return stats->freed_objects;
882  case KIND_FREED_BYTES:
883    return stats->freed_bytes;
884  case KIND_GC_INVOCATIONS:
885    return stats->gc_for_alloc_count;
886  case KIND_CLASS_INIT_COUNT:
887    return stats->class_init_count;
888  case KIND_CLASS_INIT_TIME:
889    // Convert ns to us, reduce to 32 bits.
890    return static_cast<int>(stats->class_init_time_ns / 1000);
891  case KIND_EXT_ALLOCATED_OBJECTS:
892  case KIND_EXT_ALLOCATED_BYTES:
893  case KIND_EXT_FREED_OBJECTS:
894  case KIND_EXT_FREED_BYTES:
895    return 0;  // backward compatibility
896  default:
897    LOG(FATAL) << "Unknown statistic " << kind;
898    return -1;  // unreachable
899  }
900}
901
902void Runtime::BlockSignals() {
903  SignalSet signals;
904  signals.Add(SIGPIPE);
905  // SIGQUIT is used to dump the runtime's state (including stack traces).
906  signals.Add(SIGQUIT);
907  // SIGUSR1 is used to initiate a GC.
908  signals.Add(SIGUSR1);
909  signals.Block();
910}
911
912bool Runtime::AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group,
913                                  bool create_peer) {
914  return Thread::Attach(thread_name, as_daemon, thread_group, create_peer) != NULL;
915}
916
917void Runtime::DetachCurrentThread() {
918  Thread* self = Thread::Current();
919  if (self == NULL) {
920    LOG(FATAL) << "attempting to detach thread that is not attached";
921  }
922  if (self->HasManagedStack()) {
923    LOG(FATAL) << *Thread::Current() << " attempting to detach while still running code";
924  }
925  thread_list_->Unregister(self);
926}
927
928mirror::Throwable* Runtime::GetPreAllocatedOutOfMemoryError() {
929  mirror::Throwable* oome = pre_allocated_OutOfMemoryError_.Read();
930  if (oome == NULL) {
931    LOG(ERROR) << "Failed to return pre-allocated OOME";
932  }
933  return oome;
934}
935
936void Runtime::VisitConstantRoots(RootCallback* callback, void* arg) {
937  // Visit the classes held as static in mirror classes, these can be visited concurrently and only
938  // need to be visited once per GC since they never change.
939  mirror::ArtField::VisitRoots(callback, arg);
940  mirror::ArtMethod::VisitRoots(callback, arg);
941  mirror::Class::VisitRoots(callback, arg);
942  mirror::Reference::VisitRoots(callback, arg);
943  mirror::StackTraceElement::VisitRoots(callback, arg);
944  mirror::String::VisitRoots(callback, arg);
945  mirror::Throwable::VisitRoots(callback, arg);
946  // Visit all the primitive array types classes.
947  mirror::PrimitiveArray<uint8_t>::VisitRoots(callback, arg);   // BooleanArray
948  mirror::PrimitiveArray<int8_t>::VisitRoots(callback, arg);    // ByteArray
949  mirror::PrimitiveArray<uint16_t>::VisitRoots(callback, arg);  // CharArray
950  mirror::PrimitiveArray<double>::VisitRoots(callback, arg);    // DoubleArray
951  mirror::PrimitiveArray<float>::VisitRoots(callback, arg);     // FloatArray
952  mirror::PrimitiveArray<int32_t>::VisitRoots(callback, arg);   // IntArray
953  mirror::PrimitiveArray<int64_t>::VisitRoots(callback, arg);   // LongArray
954  mirror::PrimitiveArray<int16_t>::VisitRoots(callback, arg);   // ShortArray
955}
956
957void Runtime::VisitConcurrentRoots(RootCallback* callback, void* arg, VisitRootFlags flags) {
958  intern_table_->VisitRoots(callback, arg, flags);
959  class_linker_->VisitRoots(callback, arg, flags);
960  if ((flags & kVisitRootFlagNewRoots) == 0) {
961    // Guaranteed to have no new roots in the constant roots.
962    VisitConstantRoots(callback, arg);
963  }
964}
965
966void Runtime::VisitNonThreadRoots(RootCallback* callback, void* arg) {
967  java_vm_->VisitRoots(callback, arg);
968  if (!pre_allocated_OutOfMemoryError_.IsNull()) {
969    pre_allocated_OutOfMemoryError_.VisitRoot(callback, arg, 0, kRootVMInternal);
970    DCHECK(!pre_allocated_OutOfMemoryError_.IsNull());
971  }
972  resolution_method_.VisitRoot(callback, arg, 0, kRootVMInternal);
973  DCHECK(!resolution_method_.IsNull());
974  if (HasImtConflictMethod()) {
975    imt_conflict_method_.VisitRoot(callback, arg, 0, kRootVMInternal);
976  }
977  if (HasDefaultImt()) {
978    default_imt_.VisitRoot(callback, arg, 0, kRootVMInternal);
979  }
980  for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
981    if (!callee_save_methods_[i].IsNull()) {
982      callee_save_methods_[i].VisitRoot(callback, arg, 0, kRootVMInternal);
983    }
984  }
985  {
986    MutexLock mu(Thread::Current(), method_verifier_lock_);
987    for (verifier::MethodVerifier* verifier : method_verifiers_) {
988      verifier->VisitRoots(callback, arg);
989    }
990  }
991  if (preinitialization_transaction_ != nullptr) {
992    preinitialization_transaction_->VisitRoots(callback, arg);
993  }
994  instrumentation_.VisitRoots(callback, arg);
995}
996
997void Runtime::VisitNonConcurrentRoots(RootCallback* callback, void* arg) {
998  thread_list_->VisitRoots(callback, arg);
999  VisitNonThreadRoots(callback, arg);
1000}
1001
1002void Runtime::VisitRoots(RootCallback* callback, void* arg, VisitRootFlags flags) {
1003  VisitNonConcurrentRoots(callback, arg);
1004  VisitConcurrentRoots(callback, arg, flags);
1005}
1006
1007mirror::ObjectArray<mirror::ArtMethod>* Runtime::CreateDefaultImt(ClassLinker* cl) {
1008  Thread* self = Thread::Current();
1009  StackHandleScope<1> hs(self);
1010  Handle<mirror::ObjectArray<mirror::ArtMethod>> imtable(
1011      hs.NewHandle(cl->AllocArtMethodArray(self, 64)));
1012  mirror::ArtMethod* imt_conflict_method = Runtime::Current()->GetImtConflictMethod();
1013  for (size_t i = 0; i < static_cast<size_t>(imtable->GetLength()); i++) {
1014    imtable->Set<false>(i, imt_conflict_method);
1015  }
1016  return imtable.Get();
1017}
1018
1019mirror::ArtMethod* Runtime::CreateImtConflictMethod() {
1020  Thread* self = Thread::Current();
1021  Runtime* runtime = Runtime::Current();
1022  ClassLinker* class_linker = runtime->GetClassLinker();
1023  StackHandleScope<1> hs(self);
1024  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1025  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1026  // TODO: use a special method for imt conflict method saves.
1027  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1028  // When compiling, the code pointer will get set later when the image is loaded.
1029  if (runtime->IsCompiler()) {
1030    method->SetEntryPointFromPortableCompiledCode(nullptr);
1031    method->SetEntryPointFromQuickCompiledCode(nullptr);
1032  } else {
1033    method->SetEntryPointFromPortableCompiledCode(class_linker->GetPortableImtConflictTrampoline());
1034    method->SetEntryPointFromQuickCompiledCode(class_linker->GetQuickImtConflictTrampoline());
1035  }
1036  return method.Get();
1037}
1038
1039mirror::ArtMethod* Runtime::CreateResolutionMethod() {
1040  Thread* self = Thread::Current();
1041  Runtime* runtime = Runtime::Current();
1042  ClassLinker* class_linker = runtime->GetClassLinker();
1043  StackHandleScope<1> hs(self);
1044  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1045  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1046  // TODO: use a special method for resolution method saves
1047  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1048  // When compiling, the code pointer will get set later when the image is loaded.
1049  if (runtime->IsCompiler()) {
1050    method->SetEntryPointFromPortableCompiledCode(nullptr);
1051    method->SetEntryPointFromQuickCompiledCode(nullptr);
1052  } else {
1053    method->SetEntryPointFromPortableCompiledCode(class_linker->GetPortableResolutionTrampoline());
1054    method->SetEntryPointFromQuickCompiledCode(class_linker->GetQuickResolutionTrampoline());
1055  }
1056  return method.Get();
1057}
1058
1059mirror::ArtMethod* Runtime::CreateCalleeSaveMethod(CalleeSaveType type) {
1060  Thread* self = Thread::Current();
1061  Runtime* runtime = Runtime::Current();
1062  ClassLinker* class_linker = runtime->GetClassLinker();
1063  StackHandleScope<1> hs(self);
1064  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1065  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1066  // TODO: use a special method for callee saves
1067  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1068  method->SetEntryPointFromPortableCompiledCode(nullptr);
1069  method->SetEntryPointFromQuickCompiledCode(nullptr);
1070  DCHECK_NE(instruction_set_, kNone);
1071  return method.Get();
1072}
1073
1074void Runtime::DisallowNewSystemWeaks() {
1075  monitor_list_->DisallowNewMonitors();
1076  intern_table_->DisallowNewInterns();
1077  java_vm_->DisallowNewWeakGlobals();
1078}
1079
1080void Runtime::AllowNewSystemWeaks() {
1081  monitor_list_->AllowNewMonitors();
1082  intern_table_->AllowNewInterns();
1083  java_vm_->AllowNewWeakGlobals();
1084}
1085
1086void Runtime::SetInstructionSet(InstructionSet instruction_set) {
1087  instruction_set_ = instruction_set;
1088  if ((instruction_set_ == kThumb2) || (instruction_set_ == kArm)) {
1089    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1090      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1091      callee_save_method_frame_infos_[i] = arm::ArmCalleeSaveMethodFrameInfo(type);
1092    }
1093  } else if (instruction_set_ == kMips) {
1094    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1095      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1096      callee_save_method_frame_infos_[i] = mips::MipsCalleeSaveMethodFrameInfo(type);
1097    }
1098  } else if (instruction_set_ == kX86) {
1099    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1100      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1101      callee_save_method_frame_infos_[i] = x86::X86CalleeSaveMethodFrameInfo(type);
1102    }
1103  } else if (instruction_set_ == kX86_64) {
1104    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1105      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1106      callee_save_method_frame_infos_[i] = x86_64::X86_64CalleeSaveMethodFrameInfo(type);
1107    }
1108  } else if (instruction_set_ == kArm64) {
1109    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1110      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1111      callee_save_method_frame_infos_[i] = arm64::Arm64CalleeSaveMethodFrameInfo(type);
1112    }
1113  } else {
1114    UNIMPLEMENTED(FATAL) << instruction_set_;
1115  }
1116}
1117
1118void Runtime::SetCalleeSaveMethod(mirror::ArtMethod* method, CalleeSaveType type) {
1119  DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastCalleeSaveType));
1120  callee_save_methods_[type] = GcRoot<mirror::ArtMethod>(method);
1121}
1122
1123const std::vector<const DexFile*>& Runtime::GetCompileTimeClassPath(jobject class_loader) {
1124  if (class_loader == NULL) {
1125    return GetClassLinker()->GetBootClassPath();
1126  }
1127  CHECK(UseCompileTimeClassPath());
1128  CompileTimeClassPaths::const_iterator it = compile_time_class_paths_.find(class_loader);
1129  CHECK(it != compile_time_class_paths_.end());
1130  return it->second;
1131}
1132
1133void Runtime::SetCompileTimeClassPath(jobject class_loader,
1134                                      std::vector<const DexFile*>& class_path) {
1135  CHECK(!IsStarted());
1136  use_compile_time_class_path_ = true;
1137  compile_time_class_paths_.Put(class_loader, class_path);
1138}
1139
1140void Runtime::AddMethodVerifier(verifier::MethodVerifier* verifier) {
1141  DCHECK(verifier != nullptr);
1142  MutexLock mu(Thread::Current(), method_verifier_lock_);
1143  method_verifiers_.insert(verifier);
1144}
1145
1146void Runtime::RemoveMethodVerifier(verifier::MethodVerifier* verifier) {
1147  DCHECK(verifier != nullptr);
1148  MutexLock mu(Thread::Current(), method_verifier_lock_);
1149  auto it = method_verifiers_.find(verifier);
1150  CHECK(it != method_verifiers_.end());
1151  method_verifiers_.erase(it);
1152}
1153
1154void Runtime::StartProfiler(const char* profile_output_filename) {
1155  profile_output_filename_ = profile_output_filename;
1156  profiler_started_ =
1157    BackgroundMethodSamplingProfiler::Start(profile_output_filename_, profiler_options_);
1158}
1159
1160// Transaction support.
1161void Runtime::EnterTransactionMode(Transaction* transaction) {
1162  DCHECK(IsCompiler());
1163  DCHECK(transaction != nullptr);
1164  DCHECK(!IsActiveTransaction());
1165  preinitialization_transaction_ = transaction;
1166}
1167
1168void Runtime::ExitTransactionMode() {
1169  DCHECK(IsCompiler());
1170  DCHECK(IsActiveTransaction());
1171  preinitialization_transaction_ = nullptr;
1172}
1173
1174void Runtime::RecordWriteField32(mirror::Object* obj, MemberOffset field_offset,
1175                                 uint32_t value, bool is_volatile) const {
1176  DCHECK(IsCompiler());
1177  DCHECK(IsActiveTransaction());
1178  preinitialization_transaction_->RecordWriteField32(obj, field_offset, value, is_volatile);
1179}
1180
1181void Runtime::RecordWriteField64(mirror::Object* obj, MemberOffset field_offset,
1182                                 uint64_t value, bool is_volatile) const {
1183  DCHECK(IsCompiler());
1184  DCHECK(IsActiveTransaction());
1185  preinitialization_transaction_->RecordWriteField64(obj, field_offset, value, is_volatile);
1186}
1187
1188void Runtime::RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset,
1189                                        mirror::Object* value, bool is_volatile) const {
1190  DCHECK(IsCompiler());
1191  DCHECK(IsActiveTransaction());
1192  preinitialization_transaction_->RecordWriteFieldReference(obj, field_offset, value, is_volatile);
1193}
1194
1195void Runtime::RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const {
1196  DCHECK(IsCompiler());
1197  DCHECK(IsActiveTransaction());
1198  preinitialization_transaction_->RecordWriteArray(array, index, value);
1199}
1200
1201void Runtime::RecordStrongStringInsertion(mirror::String* s, uint32_t hash_code) const {
1202  DCHECK(IsCompiler());
1203  DCHECK(IsActiveTransaction());
1204  preinitialization_transaction_->RecordStrongStringInsertion(s, hash_code);
1205}
1206
1207void Runtime::RecordWeakStringInsertion(mirror::String* s, uint32_t hash_code) const {
1208  DCHECK(IsCompiler());
1209  DCHECK(IsActiveTransaction());
1210  preinitialization_transaction_->RecordWeakStringInsertion(s, hash_code);
1211}
1212
1213void Runtime::RecordStrongStringRemoval(mirror::String* s, uint32_t hash_code) const {
1214  DCHECK(IsCompiler());
1215  DCHECK(IsActiveTransaction());
1216  preinitialization_transaction_->RecordStrongStringRemoval(s, hash_code);
1217}
1218
1219void Runtime::RecordWeakStringRemoval(mirror::String* s, uint32_t hash_code) const {
1220  DCHECK(IsCompiler());
1221  DCHECK(IsActiveTransaction());
1222  preinitialization_transaction_->RecordWeakStringRemoval(s, hash_code);
1223}
1224
1225void Runtime::SetFaultMessage(const std::string& message) {
1226  MutexLock mu(Thread::Current(), fault_message_lock_);
1227  fault_message_ = message;
1228}
1229
1230void Runtime::AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* argv)
1231    const {
1232  if (GetInstrumentation()->InterpretOnly()) {
1233    argv->push_back("--compiler-filter=interpret-only");
1234  }
1235
1236  // Make the dex2oat instruction set match that of the launching runtime. If we have multiple
1237  // architecture support, dex2oat may be compiled as a different instruction-set than that
1238  // currently being executed.
1239  std::string instruction_set("--instruction-set=");
1240  instruction_set += GetInstructionSetString(kRuntimeISA);
1241  argv->push_back(instruction_set);
1242
1243  std::string features("--instruction-set-features=");
1244  features += GetDefaultInstructionSetFeatures();
1245  argv->push_back(features);
1246}
1247
1248void Runtime::UpdateProfilerState(int state) {
1249  VLOG(profiler) << "Profiler state updated to " << state;
1250}
1251}  // namespace art
1252