runtime.cc revision 20ae1d77463d1c3f206eac8d541124b4555464de 
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.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      default_stack_size_(0),
105      heap_(nullptr),
106      max_spins_before_thin_lock_inflation_(Monitor::kDefaultMaxSpinsBeforeThinLockInflation),
107      monitor_list_(nullptr),
108      monitor_pool_(nullptr),
109      thread_list_(nullptr),
110      intern_table_(nullptr),
111      class_linker_(nullptr),
112      signal_catcher_(nullptr),
113      java_vm_(nullptr),
114      fault_message_lock_("Fault message lock"),
115      fault_message_(""),
116      method_verifier_lock_("Method verifiers lock"),
117      threads_being_born_(0),
118      shutdown_cond_(new ConditionVariable("Runtime shutdown", *Locks::runtime_shutdown_lock_)),
119      shutting_down_(false),
120      shutting_down_started_(false),
121      started_(false),
122      finished_starting_(false),
123      vfprintf_(nullptr),
124      exit_(nullptr),
125      abort_(nullptr),
126      stats_enabled_(false),
127      running_on_valgrind_(RUNNING_ON_VALGRIND > 0),
128      profiler_started_(false),
129      method_trace_(false),
130      method_trace_file_size_(0),
131      instrumentation_(),
132      use_compile_time_class_path_(false),
133      main_thread_group_(nullptr),
134      system_thread_group_(nullptr),
135      system_class_loader_(nullptr),
136      dump_gc_performance_on_shutdown_(false),
137      preinitialization_transaction_(nullptr),
138      null_pointer_handler_(nullptr),
139      suspend_handler_(nullptr),
140      stack_overflow_handler_(nullptr),
141      verify_(false),
142      target_sdk_version_(0),
143      implicit_null_checks_(false),
144      implicit_so_checks_(false),
145      implicit_suspend_checks_(false) {
146}
147
148Runtime::~Runtime() {
149  if (dump_gc_performance_on_shutdown_) {
150    // This can't be called from the Heap destructor below because it
151    // could call RosAlloc::InspectAll() which needs the thread_list
152    // to be still alive.
153    heap_->DumpGcPerformanceInfo(LOG(INFO));
154  }
155
156  Thread* self = Thread::Current();
157  {
158    MutexLock mu(self, *Locks::runtime_shutdown_lock_);
159    shutting_down_started_ = true;
160    while (threads_being_born_ > 0) {
161      shutdown_cond_->Wait(self);
162    }
163    shutting_down_ = true;
164  }
165  // Shut down background profiler before the runtime exits.
166  if (profiler_started_) {
167    BackgroundMethodSamplingProfiler::Shutdown();
168  }
169
170  Trace::Shutdown();
171
172  // Make sure to let the GC complete if it is running.
173  heap_->WaitForGcToComplete(gc::kGcCauseBackground, self);
174  heap_->DeleteThreadPool();
175
176  // Make sure our internal threads are dead before we start tearing down things they're using.
177  Dbg::StopJdwp();
178  delete signal_catcher_;
179
180  // Make sure all other non-daemon threads have terminated, and all daemon threads are suspended.
181  delete thread_list_;
182  delete monitor_list_;
183  delete monitor_pool_;
184  delete class_linker_;
185  delete heap_;
186  delete intern_table_;
187  delete java_vm_;
188  Thread::Shutdown();
189  QuasiAtomic::Shutdown();
190  verifier::MethodVerifier::Shutdown();
191  // TODO: acquire a static mutex on Runtime to avoid racing.
192  CHECK(instance_ == nullptr || instance_ == this);
193  instance_ = nullptr;
194
195  delete null_pointer_handler_;
196  delete suspend_handler_;
197  delete stack_overflow_handler_;
198}
199
200struct AbortState {
201  void Dump(std::ostream& os) NO_THREAD_SAFETY_ANALYSIS {
202    if (gAborting > 1) {
203      os << "Runtime aborting --- recursively, so no thread-specific detail!\n";
204      return;
205    }
206    gAborting++;
207    os << "Runtime aborting...\n";
208    if (Runtime::Current() == NULL) {
209      os << "(Runtime does not yet exist!)\n";
210      return;
211    }
212    Thread* self = Thread::Current();
213    if (self == nullptr) {
214      os << "(Aborting thread was not attached to runtime!)\n";
215      DumpKernelStack(os, GetTid(), "  kernel: ", false);
216      DumpNativeStack(os, GetTid(), "  native: ", nullptr);
217    } else {
218      os << "Aborting thread:\n";
219      if (Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)) {
220        DumpThread(os, self);
221      } else {
222        if (Locks::mutator_lock_->SharedTryLock(self)) {
223          DumpThread(os, self);
224          Locks::mutator_lock_->SharedUnlock(self);
225        }
226      }
227    }
228    DumpAllThreads(os, self);
229  }
230
231  void DumpThread(std::ostream& os, Thread* self) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
232    self->Dump(os);
233    if (self->IsExceptionPending()) {
234      ThrowLocation throw_location;
235      mirror::Throwable* exception = self->GetException(&throw_location);
236      os << "Pending exception " << PrettyTypeOf(exception)
237          << " thrown by '" << throw_location.Dump() << "'\n"
238          << exception->Dump();
239    }
240  }
241
242  void DumpAllThreads(std::ostream& os, Thread* self) NO_THREAD_SAFETY_ANALYSIS {
243    Runtime* runtime = Runtime::Current();
244    if (runtime != nullptr) {
245      ThreadList* thread_list = runtime->GetThreadList();
246      if (thread_list != nullptr) {
247        bool tll_already_held = Locks::thread_list_lock_->IsExclusiveHeld(self);
248        bool ml_already_held = Locks::mutator_lock_->IsSharedHeld(self);
249        if (!tll_already_held || !ml_already_held) {
250          os << "Dumping all threads without appropriate locks held:"
251              << (!tll_already_held ? " thread list lock" : "")
252              << (!ml_already_held ? " mutator lock" : "")
253              << "\n";
254        }
255        os << "All threads:\n";
256        thread_list->DumpLocked(os);
257      }
258    }
259  }
260};
261
262void Runtime::Abort() {
263  gAborting++;  // set before taking any locks
264
265  // Ensure that we don't have multiple threads trying to abort at once,
266  // which would result in significantly worse diagnostics.
267  MutexLock mu(Thread::Current(), *Locks::abort_lock_);
268
269  // Get any pending output out of the way.
270  fflush(NULL);
271
272  // Many people have difficulty distinguish aborts from crashes,
273  // so be explicit.
274  AbortState state;
275  LOG(INTERNAL_FATAL) << Dumpable<AbortState>(state);
276
277  // Call the abort hook if we have one.
278  if (Runtime::Current() != NULL && Runtime::Current()->abort_ != NULL) {
279    LOG(INTERNAL_FATAL) << "Calling abort hook...";
280    Runtime::Current()->abort_();
281    // notreached
282    LOG(INTERNAL_FATAL) << "Unexpectedly returned from abort hook!";
283  }
284
285#if defined(__GLIBC__)
286  // TODO: we ought to be able to use pthread_kill(3) here (or abort(3),
287  // which POSIX defines in terms of raise(3), which POSIX defines in terms
288  // of pthread_kill(3)). On Linux, though, libcorkscrew can't unwind through
289  // libpthread, which means the stacks we dump would be useless. Calling
290  // tgkill(2) directly avoids that.
291  syscall(__NR_tgkill, getpid(), GetTid(), SIGABRT);
292  // TODO: LLVM installs it's own SIGABRT handler so exit to be safe... Can we disable that in LLVM?
293  // If not, we could use sigaction(3) before calling tgkill(2) and lose this call to exit(3).
294  exit(1);
295#else
296  abort();
297#endif
298  // notreached
299}
300
301void Runtime::PreZygoteFork() {
302  heap_->PreZygoteFork();
303}
304
305void Runtime::CallExitHook(jint status) {
306  if (exit_ != NULL) {
307    ScopedThreadStateChange tsc(Thread::Current(), kNative);
308    exit_(status);
309    LOG(WARNING) << "Exit hook returned instead of exiting!";
310  }
311}
312
313void Runtime::SweepSystemWeaks(IsMarkedCallback* visitor, void* arg) {
314  GetInternTable()->SweepInternTableWeaks(visitor, arg);
315  GetMonitorList()->SweepMonitorList(visitor, arg);
316  GetJavaVM()->SweepJniWeakGlobals(visitor, arg);
317}
318
319bool Runtime::Create(const RuntimeOptions& options, bool ignore_unrecognized) {
320  // TODO: acquire a static mutex on Runtime to avoid racing.
321  if (Runtime::instance_ != NULL) {
322    return false;
323  }
324  InitLogging(NULL);  // Calls Locks::Init() as a side effect.
325  instance_ = new Runtime;
326  if (!instance_->Init(options, ignore_unrecognized)) {
327    delete instance_;
328    instance_ = NULL;
329    return false;
330  }
331  return true;
332}
333
334jobject CreateSystemClassLoader() {
335  if (Runtime::Current()->UseCompileTimeClassPath()) {
336    return NULL;
337  }
338
339  ScopedObjectAccess soa(Thread::Current());
340  ClassLinker* cl = Runtime::Current()->GetClassLinker();
341
342  StackHandleScope<3> hs(soa.Self());
343  Handle<mirror::Class> class_loader_class(
344      hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_ClassLoader)));
345  CHECK(cl->EnsureInitialized(class_loader_class, true, true));
346
347  mirror::ArtMethod* getSystemClassLoader =
348      class_loader_class->FindDirectMethod("getSystemClassLoader", "()Ljava/lang/ClassLoader;");
349  CHECK(getSystemClassLoader != NULL);
350
351  JValue result = InvokeWithJValues(soa, nullptr, soa.EncodeMethod(getSystemClassLoader), nullptr);
352  Handle<mirror::ClassLoader> class_loader(
353      hs.NewHandle(down_cast<mirror::ClassLoader*>(result.GetL())));
354  CHECK(class_loader.Get() != nullptr);
355  JNIEnv* env = soa.Self()->GetJniEnv();
356  ScopedLocalRef<jobject> system_class_loader(env,
357                                              soa.AddLocalReference<jobject>(class_loader.Get()));
358  CHECK(system_class_loader.get() != nullptr);
359
360  soa.Self()->SetClassLoaderOverride(class_loader.Get());
361
362  Handle<mirror::Class> thread_class(
363      hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_Thread)));
364  CHECK(cl->EnsureInitialized(thread_class, true, true));
365
366  mirror::ArtField* contextClassLoader =
367      thread_class->FindDeclaredInstanceField("contextClassLoader", "Ljava/lang/ClassLoader;");
368  CHECK(contextClassLoader != NULL);
369
370  // We can't run in a transaction yet.
371  contextClassLoader->SetObject<false>(soa.Self()->GetPeer(), class_loader.Get());
372
373  return env->NewGlobalRef(system_class_loader.get());
374}
375
376std::string Runtime::GetPatchoatExecutable() const {
377  if (!patchoat_executable_.empty()) {
378    return patchoat_executable_;
379  }
380  std::string patchoat_executable_(GetAndroidRoot());
381  patchoat_executable_ += (kIsDebugBuild ? "/bin/patchoatd" : "/bin/patchoat");
382  return patchoat_executable_;
383}
384
385std::string Runtime::GetCompilerExecutable() const {
386  if (!compiler_executable_.empty()) {
387    return compiler_executable_;
388  }
389  std::string compiler_executable(GetAndroidRoot());
390  compiler_executable += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat");
391  return compiler_executable;
392}
393
394bool Runtime::Start() {
395  VLOG(startup) << "Runtime::Start entering";
396
397  // Restore main thread state to kNative as expected by native code.
398  Thread* self = Thread::Current();
399  self->TransitionFromRunnableToSuspended(kNative);
400
401  started_ = true;
402
403  // InitNativeMethods needs to be after started_ so that the classes
404  // it touches will have methods linked to the oat file if necessary.
405  InitNativeMethods();
406
407  // Initialize well known thread group values that may be accessed threads while attaching.
408  InitThreadGroups(self);
409
410  Thread::FinishStartup();
411
412  if (is_zygote_) {
413    if (!InitZygote()) {
414      return false;
415    }
416  } else {
417    DidForkFromZygote();
418  }
419
420  StartDaemonThreads();
421
422  system_class_loader_ = CreateSystemClassLoader();
423
424  {
425    ScopedObjectAccess soa(self);
426    self->GetJniEnv()->locals.AssertEmpty();
427  }
428
429  VLOG(startup) << "Runtime::Start exiting";
430  finished_starting_ = true;
431
432  if (profiler_options_.IsEnabled() && !profile_output_filename_.empty()) {
433    // User has asked for a profile using -Xenable-profiler.
434    // Create the profile file if it doesn't exist.
435    int fd = open(profile_output_filename_.c_str(), O_RDWR|O_CREAT|O_EXCL, 0660);
436    if (fd >= 0) {
437      close(fd);
438    } else if (errno != EEXIST) {
439      LOG(INFO) << "Failed to access the profile file. Profiler disabled.";
440      return true;
441    }
442    StartProfiler(profile_output_filename_.c_str());
443  }
444
445  return true;
446}
447
448void Runtime::EndThreadBirth() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) {
449  DCHECK_GT(threads_being_born_, 0U);
450  threads_being_born_--;
451  if (shutting_down_started_ && threads_being_born_ == 0) {
452    shutdown_cond_->Broadcast(Thread::Current());
453  }
454}
455
456// Do zygote-mode-only initialization.
457bool Runtime::InitZygote() {
458#ifdef __linux__
459  // zygote goes into its own process group
460  setpgid(0, 0);
461
462  // See storage config details at http://source.android.com/tech/storage/
463  // Create private mount namespace shared by all children
464  if (unshare(CLONE_NEWNS) == -1) {
465    PLOG(WARNING) << "Failed to unshare()";
466    return false;
467  }
468
469  // Mark rootfs as being a slave so that changes from default
470  // namespace only flow into our children.
471  if (mount("rootfs", "/", NULL, (MS_SLAVE | MS_REC), NULL) == -1) {
472    PLOG(WARNING) << "Failed to mount() rootfs as MS_SLAVE";
473    return false;
474  }
475
476  // Create a staging tmpfs that is shared by our children; they will
477  // bind mount storage into their respective private namespaces, which
478  // are isolated from each other.
479  const char* target_base = getenv("EMULATED_STORAGE_TARGET");
480  if (target_base != NULL) {
481    if (mount("tmpfs", target_base, "tmpfs", MS_NOSUID | MS_NODEV,
482              "uid=0,gid=1028,mode=0751") == -1) {
483      LOG(WARNING) << "Failed to mount tmpfs to " << target_base;
484      return false;
485    }
486  }
487
488  return true;
489#else
490  UNIMPLEMENTED(FATAL);
491  return false;
492#endif
493}
494
495void Runtime::DidForkFromZygote() {
496  is_zygote_ = false;
497
498  // Create the thread pool.
499  heap_->CreateThreadPool();
500
501  StartSignalCatcher();
502
503  // Start the JDWP thread. If the command-line debugger flags specified "suspend=y",
504  // this will pause the runtime, so we probably want this to come last.
505  Dbg::StartJdwp();
506}
507
508void Runtime::StartSignalCatcher() {
509  if (!is_zygote_) {
510    signal_catcher_ = new SignalCatcher(stack_trace_file_);
511  }
512}
513
514bool Runtime::IsShuttingDown(Thread* self) {
515  MutexLock mu(self, *Locks::runtime_shutdown_lock_);
516  return IsShuttingDownLocked();
517}
518
519void Runtime::StartDaemonThreads() {
520  VLOG(startup) << "Runtime::StartDaemonThreads entering";
521
522  Thread* self = Thread::Current();
523
524  // Must be in the kNative state for calling native methods.
525  CHECK_EQ(self->GetState(), kNative);
526
527  JNIEnv* env = self->GetJniEnv();
528  env->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons,
529                            WellKnownClasses::java_lang_Daemons_start);
530  if (env->ExceptionCheck()) {
531    env->ExceptionDescribe();
532    LOG(FATAL) << "Error starting java.lang.Daemons";
533  }
534
535  VLOG(startup) << "Runtime::StartDaemonThreads exiting";
536}
537
538bool Runtime::Init(const RuntimeOptions& raw_options, bool ignore_unrecognized) {
539  CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize);
540
541  std::unique_ptr<ParsedOptions> options(ParsedOptions::Create(raw_options, ignore_unrecognized));
542  if (options.get() == NULL) {
543    LOG(ERROR) << "Failed to parse options";
544    return false;
545  }
546  VLOG(startup) << "Runtime::Init -verbose:startup enabled";
547
548  QuasiAtomic::Startup();
549
550  Monitor::Init(options->lock_profiling_threshold_, options->hook_is_sensitive_thread_);
551
552  boot_class_path_string_ = options->boot_class_path_string_;
553  class_path_string_ = options->class_path_string_;
554  properties_ = options->properties_;
555
556  compiler_callbacks_ = options->compiler_callbacks_;
557  patchoat_executable_ = options->patchoat_executable_;
558  must_relocate_ = options->must_relocate_;
559  is_zygote_ = options->is_zygote_;
560  is_explicit_gc_disabled_ = options->is_explicit_gc_disabled_;
561
562  vfprintf_ = options->hook_vfprintf_;
563  exit_ = options->hook_exit_;
564  abort_ = options->hook_abort_;
565
566  default_stack_size_ = options->stack_size_;
567  stack_trace_file_ = options->stack_trace_file_;
568
569  compiler_executable_ = options->compiler_executable_;
570  compiler_options_ = options->compiler_options_;
571  image_compiler_options_ = options->image_compiler_options_;
572
573  max_spins_before_thin_lock_inflation_ = options->max_spins_before_thin_lock_inflation_;
574
575  monitor_list_ = new MonitorList;
576  monitor_pool_ = MonitorPool::Create();
577  thread_list_ = new ThreadList;
578  intern_table_ = new InternTable;
579
580  verify_ = options->verify_;
581
582  if (options->interpreter_only_) {
583    GetInstrumentation()->ForceInterpretOnly();
584  }
585
586  heap_ = new gc::Heap(options->heap_initial_size_,
587                       options->heap_growth_limit_,
588                       options->heap_min_free_,
589                       options->heap_max_free_,
590                       options->heap_target_utilization_,
591                       options->foreground_heap_growth_multiplier_,
592                       options->heap_maximum_size_,
593                       options->image_,
594                       options->image_isa_,
595                       options->collector_type_,
596                       options->background_collector_type_,
597                       options->parallel_gc_threads_,
598                       options->conc_gc_threads_,
599                       options->low_memory_mode_,
600                       options->long_pause_log_threshold_,
601                       options->long_gc_log_threshold_,
602                       options->ignore_max_footprint_,
603                       options->use_tlab_,
604                       options->verify_pre_gc_heap_,
605                       options->verify_pre_sweeping_heap_,
606                       options->verify_post_gc_heap_,
607                       options->verify_pre_gc_rosalloc_,
608                       options->verify_pre_sweeping_rosalloc_,
609                       options->verify_post_gc_rosalloc_,
610                       options->use_homogeneous_space_compaction_for_oom_,
611                       options->min_interval_homogeneous_space_compaction_by_oom_);
612
613  dump_gc_performance_on_shutdown_ = options->dump_gc_performance_on_shutdown_;
614
615  BlockSignals();
616  InitPlatformSignalHandlers();
617
618  // Change the implicit checks flags based on runtime architecture.
619  switch (kRuntimeISA) {
620    case kArm:
621    case kThumb2:
622    case kX86:
623    case kArm64:
624    case kX86_64:
625      implicit_null_checks_ = true;
626      implicit_so_checks_ = true;
627      break;
628    default:
629      // Keep the defaults.
630      break;
631  }
632
633  if (implicit_null_checks_ || implicit_so_checks_ || implicit_suspend_checks_) {
634    fault_manager.Init();
635
636    // These need to be in a specific order.  The null point check handler must be
637    // after the suspend check and stack overflow check handlers.
638    if (implicit_suspend_checks_) {
639      suspend_handler_ = new SuspensionHandler(&fault_manager);
640    }
641
642    if (implicit_so_checks_) {
643      stack_overflow_handler_ = new StackOverflowHandler(&fault_manager);
644    }
645
646    if (implicit_null_checks_) {
647      null_pointer_handler_ = new NullPointerHandler(&fault_manager);
648    }
649
650    if (kEnableJavaStackTraceHandler) {
651      new JavaStackTraceHandler(&fault_manager);
652    }
653  }
654
655  java_vm_ = new JavaVMExt(this, options.get());
656
657  Thread::Startup();
658
659  // ClassLinker needs an attached thread, but we can't fully attach a thread without creating
660  // objects. We can't supply a thread group yet; it will be fixed later. Since we are the main
661  // thread, we do not get a java peer.
662  Thread* self = Thread::Attach("main", false, NULL, false);
663  CHECK_EQ(self->GetThreadId(), ThreadList::kMainThreadId);
664  CHECK(self != NULL);
665
666  // Set us to runnable so tools using a runtime can allocate and GC by default
667  self->TransitionFromSuspendedToRunnable();
668
669  // Now we're attached, we can take the heap locks and validate the heap.
670  GetHeap()->EnableObjectValidation();
671
672  CHECK_GE(GetHeap()->GetContinuousSpaces().size(), 1U);
673  class_linker_ = new ClassLinker(intern_table_);
674  if (GetHeap()->HasImageSpace()) {
675    class_linker_->InitFromImage();
676    if (kIsDebugBuild) {
677      GetHeap()->GetImageSpace()->VerifyImageAllocations();
678    }
679  } else {
680    CHECK(options->boot_class_path_ != NULL);
681    CHECK_NE(options->boot_class_path_->size(), 0U);
682    class_linker_->InitFromCompiler(*options->boot_class_path_);
683  }
684  CHECK(class_linker_ != NULL);
685  verifier::MethodVerifier::Init();
686
687  method_trace_ = options->method_trace_;
688  method_trace_file_ = options->method_trace_file_;
689  method_trace_file_size_ = options->method_trace_file_size_;
690
691  profile_output_filename_ = options->profile_output_filename_;
692  profiler_options_ = options->profiler_options_;
693
694  // TODO: move this to just be an Trace::Start argument
695  Trace::SetDefaultClockSource(options->profile_clock_source_);
696
697  if (options->method_trace_) {
698    ScopedThreadStateChange tsc(self, kWaitingForMethodTracingStart);
699    Trace::Start(options->method_trace_file_.c_str(), -1, options->method_trace_file_size_, 0,
700                 false, false, 0);
701  }
702
703  // Pre-allocate an OutOfMemoryError for the double-OOME case.
704  self->ThrowNewException(ThrowLocation(), "Ljava/lang/OutOfMemoryError;",
705                          "OutOfMemoryError thrown while trying to throw OutOfMemoryError; "
706                          "no stack available");
707  pre_allocated_OutOfMemoryError_ = GcRoot<mirror::Throwable>(self->GetException(NULL));
708  self->ClearException();
709
710  // Look for a native bridge.
711  SetNativeBridgeLibraryString(options->native_bridge_library_string_);
712
713  VLOG(startup) << "Runtime::Init exiting";
714  return true;
715}
716
717void Runtime::InitNativeMethods() {
718  VLOG(startup) << "Runtime::InitNativeMethods entering";
719  Thread* self = Thread::Current();
720  JNIEnv* env = self->GetJniEnv();
721
722  // Must be in the kNative state for calling native methods (JNI_OnLoad code).
723  CHECK_EQ(self->GetState(), kNative);
724
725  // First set up JniConstants, which is used by both the runtime's built-in native
726  // methods and libcore.
727  JniConstants::init(env);
728  WellKnownClasses::Init(env);
729
730  // Then set up the native methods provided by the runtime itself.
731  RegisterRuntimeNativeMethods(env);
732
733  // Then set up libcore, which is just a regular JNI library with a regular JNI_OnLoad.
734  // Most JNI libraries can just use System.loadLibrary, but libcore can't because it's
735  // the library that implements System.loadLibrary!
736  {
737    std::string mapped_name(StringPrintf(OS_SHARED_LIB_FORMAT_STR, "javacore"));
738    std::string reason;
739    self->TransitionFromSuspendedToRunnable();
740    StackHandleScope<1> hs(self);
741    auto class_loader(hs.NewHandle<mirror::ClassLoader>(nullptr));
742    if (!instance_->java_vm_->LoadNativeLibrary(mapped_name, class_loader, &reason)) {
743      LOG(FATAL) << "LoadNativeLibrary failed for \"" << mapped_name << "\": " << reason;
744    }
745    self->TransitionFromRunnableToSuspended(kNative);
746  }
747
748  // Initialize well known classes that may invoke runtime native methods.
749  WellKnownClasses::LateInit(env);
750
751  VLOG(startup) << "Runtime::InitNativeMethods exiting";
752}
753
754void Runtime::InitThreadGroups(Thread* self) {
755  JNIEnvExt* env = self->GetJniEnv();
756  ScopedJniEnvLocalRefState env_state(env);
757  main_thread_group_ =
758      env->NewGlobalRef(env->GetStaticObjectField(
759          WellKnownClasses::java_lang_ThreadGroup,
760          WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup));
761  CHECK(main_thread_group_ != NULL || IsCompiler());
762  system_thread_group_ =
763      env->NewGlobalRef(env->GetStaticObjectField(
764          WellKnownClasses::java_lang_ThreadGroup,
765          WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup));
766  CHECK(system_thread_group_ != NULL || IsCompiler());
767}
768
769jobject Runtime::GetMainThreadGroup() const {
770  CHECK(main_thread_group_ != NULL || IsCompiler());
771  return main_thread_group_;
772}
773
774jobject Runtime::GetSystemThreadGroup() const {
775  CHECK(system_thread_group_ != NULL || IsCompiler());
776  return system_thread_group_;
777}
778
779jobject Runtime::GetSystemClassLoader() const {
780  CHECK(system_class_loader_ != NULL || IsCompiler());
781  return system_class_loader_;
782}
783
784void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) {
785#define REGISTER(FN) extern void FN(JNIEnv*); FN(env)
786  // Register Throwable first so that registration of other native methods can throw exceptions
787  REGISTER(register_java_lang_Throwable);
788  REGISTER(register_dalvik_system_DexFile);
789  REGISTER(register_dalvik_system_VMDebug);
790  REGISTER(register_dalvik_system_VMRuntime);
791  REGISTER(register_dalvik_system_VMStack);
792  REGISTER(register_dalvik_system_ZygoteHooks);
793  REGISTER(register_java_lang_Class);
794  REGISTER(register_java_lang_DexCache);
795  REGISTER(register_java_lang_Object);
796  REGISTER(register_java_lang_Runtime);
797  REGISTER(register_java_lang_String);
798  REGISTER(register_java_lang_System);
799  REGISTER(register_java_lang_Thread);
800  REGISTER(register_java_lang_VMClassLoader);
801  REGISTER(register_java_lang_ref_Reference);
802  REGISTER(register_java_lang_reflect_Array);
803  REGISTER(register_java_lang_reflect_Constructor);
804  REGISTER(register_java_lang_reflect_Field);
805  REGISTER(register_java_lang_reflect_Method);
806  REGISTER(register_java_lang_reflect_Proxy);
807  REGISTER(register_java_util_concurrent_atomic_AtomicLong);
808  REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmServer);
809  REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmVmInternal);
810  REGISTER(register_sun_misc_Unsafe);
811#undef REGISTER
812}
813
814void Runtime::DumpForSigQuit(std::ostream& os) {
815  GetClassLinker()->DumpForSigQuit(os);
816  GetInternTable()->DumpForSigQuit(os);
817  GetJavaVM()->DumpForSigQuit(os);
818  GetHeap()->DumpForSigQuit(os);
819  os << "\n";
820
821  thread_list_->DumpForSigQuit(os);
822  BaseMutex::DumpAll(os);
823}
824
825void Runtime::DumpLockHolders(std::ostream& os) {
826  uint64_t mutator_lock_owner = Locks::mutator_lock_->GetExclusiveOwnerTid();
827  pid_t thread_list_lock_owner = GetThreadList()->GetLockOwner();
828  pid_t classes_lock_owner = GetClassLinker()->GetClassesLockOwner();
829  pid_t dex_lock_owner = GetClassLinker()->GetDexLockOwner();
830  if ((thread_list_lock_owner | classes_lock_owner | dex_lock_owner) != 0) {
831    os << "Mutator lock exclusive owner tid: " << mutator_lock_owner << "\n"
832       << "ThreadList lock owner tid: " << thread_list_lock_owner << "\n"
833       << "ClassLinker classes lock owner tid: " << classes_lock_owner << "\n"
834       << "ClassLinker dex lock owner tid: " << dex_lock_owner << "\n";
835  }
836}
837
838void Runtime::SetStatsEnabled(bool new_state) {
839  if (new_state == true) {
840    GetStats()->Clear(~0);
841    // TODO: wouldn't it make more sense to clear _all_ threads' stats?
842    Thread::Current()->GetStats()->Clear(~0);
843    GetInstrumentation()->InstrumentQuickAllocEntryPoints();
844  } else {
845    GetInstrumentation()->UninstrumentQuickAllocEntryPoints();
846  }
847  stats_enabled_ = new_state;
848}
849
850void Runtime::ResetStats(int kinds) {
851  GetStats()->Clear(kinds & 0xffff);
852  // TODO: wouldn't it make more sense to clear _all_ threads' stats?
853  Thread::Current()->GetStats()->Clear(kinds >> 16);
854}
855
856int32_t Runtime::GetStat(int kind) {
857  RuntimeStats* stats;
858  if (kind < (1<<16)) {
859    stats = GetStats();
860  } else {
861    stats = Thread::Current()->GetStats();
862    kind >>= 16;
863  }
864  switch (kind) {
865  case KIND_ALLOCATED_OBJECTS:
866    return stats->allocated_objects;
867  case KIND_ALLOCATED_BYTES:
868    return stats->allocated_bytes;
869  case KIND_FREED_OBJECTS:
870    return stats->freed_objects;
871  case KIND_FREED_BYTES:
872    return stats->freed_bytes;
873  case KIND_GC_INVOCATIONS:
874    return stats->gc_for_alloc_count;
875  case KIND_CLASS_INIT_COUNT:
876    return stats->class_init_count;
877  case KIND_CLASS_INIT_TIME:
878    // Convert ns to us, reduce to 32 bits.
879    return static_cast<int>(stats->class_init_time_ns / 1000);
880  case KIND_EXT_ALLOCATED_OBJECTS:
881  case KIND_EXT_ALLOCATED_BYTES:
882  case KIND_EXT_FREED_OBJECTS:
883  case KIND_EXT_FREED_BYTES:
884    return 0;  // backward compatibility
885  default:
886    LOG(FATAL) << "Unknown statistic " << kind;
887    return -1;  // unreachable
888  }
889}
890
891void Runtime::BlockSignals() {
892  SignalSet signals;
893  signals.Add(SIGPIPE);
894  // SIGQUIT is used to dump the runtime's state (including stack traces).
895  signals.Add(SIGQUIT);
896  // SIGUSR1 is used to initiate a GC.
897  signals.Add(SIGUSR1);
898  signals.Block();
899}
900
901bool Runtime::AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group,
902                                  bool create_peer) {
903  bool success = Thread::Attach(thread_name, as_daemon, thread_group, create_peer) != NULL;
904  if (thread_name == NULL) {
905    LOG(WARNING) << *Thread::Current() << " attached without supplying a name";
906  }
907  return success;
908}
909
910void Runtime::DetachCurrentThread() {
911  Thread* self = Thread::Current();
912  if (self == NULL) {
913    LOG(FATAL) << "attempting to detach thread that is not attached";
914  }
915  if (self->HasManagedStack()) {
916    LOG(FATAL) << *Thread::Current() << " attempting to detach while still running code";
917  }
918  thread_list_->Unregister(self);
919}
920
921mirror::Throwable* Runtime::GetPreAllocatedOutOfMemoryError() {
922  mirror::Throwable* oome = pre_allocated_OutOfMemoryError_.Read();
923  if (oome == NULL) {
924    LOG(ERROR) << "Failed to return pre-allocated OOME";
925  }
926  return oome;
927}
928
929void Runtime::VisitConstantRoots(RootCallback* callback, void* arg) {
930  // Visit the classes held as static in mirror classes, these can be visited concurrently and only
931  // need to be visited once per GC since they never change.
932  mirror::ArtField::VisitRoots(callback, arg);
933  mirror::ArtMethod::VisitRoots(callback, arg);
934  mirror::Class::VisitRoots(callback, arg);
935  mirror::Reference::VisitRoots(callback, arg);
936  mirror::StackTraceElement::VisitRoots(callback, arg);
937  mirror::String::VisitRoots(callback, arg);
938  mirror::Throwable::VisitRoots(callback, arg);
939  // Visit all the primitive array types classes.
940  mirror::PrimitiveArray<uint8_t>::VisitRoots(callback, arg);   // BooleanArray
941  mirror::PrimitiveArray<int8_t>::VisitRoots(callback, arg);    // ByteArray
942  mirror::PrimitiveArray<uint16_t>::VisitRoots(callback, arg);  // CharArray
943  mirror::PrimitiveArray<double>::VisitRoots(callback, arg);    // DoubleArray
944  mirror::PrimitiveArray<float>::VisitRoots(callback, arg);     // FloatArray
945  mirror::PrimitiveArray<int32_t>::VisitRoots(callback, arg);   // IntArray
946  mirror::PrimitiveArray<int64_t>::VisitRoots(callback, arg);   // LongArray
947  mirror::PrimitiveArray<int16_t>::VisitRoots(callback, arg);   // ShortArray
948}
949
950void Runtime::VisitConcurrentRoots(RootCallback* callback, void* arg, VisitRootFlags flags) {
951  intern_table_->VisitRoots(callback, arg, flags);
952  class_linker_->VisitRoots(callback, arg, flags);
953  if ((flags & kVisitRootFlagNewRoots) == 0) {
954    // Guaranteed to have no new roots in the constant roots.
955    VisitConstantRoots(callback, arg);
956  }
957}
958
959void Runtime::VisitNonThreadRoots(RootCallback* callback, void* arg) {
960  java_vm_->VisitRoots(callback, arg);
961  if (!pre_allocated_OutOfMemoryError_.IsNull()) {
962    pre_allocated_OutOfMemoryError_.VisitRoot(callback, arg, 0, kRootVMInternal);
963    DCHECK(!pre_allocated_OutOfMemoryError_.IsNull());
964  }
965  resolution_method_.VisitRoot(callback, arg, 0, kRootVMInternal);
966  DCHECK(!resolution_method_.IsNull());
967  if (HasImtConflictMethod()) {
968    imt_conflict_method_.VisitRoot(callback, arg, 0, kRootVMInternal);
969  }
970  if (HasDefaultImt()) {
971    default_imt_.VisitRoot(callback, arg, 0, kRootVMInternal);
972  }
973  for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
974    if (!callee_save_methods_[i].IsNull()) {
975      callee_save_methods_[i].VisitRoot(callback, arg, 0, kRootVMInternal);
976    }
977  }
978  {
979    MutexLock mu(Thread::Current(), method_verifier_lock_);
980    for (verifier::MethodVerifier* verifier : method_verifiers_) {
981      verifier->VisitRoots(callback, arg);
982    }
983  }
984  if (preinitialization_transaction_ != nullptr) {
985    preinitialization_transaction_->VisitRoots(callback, arg);
986  }
987  instrumentation_.VisitRoots(callback, arg);
988}
989
990void Runtime::VisitNonConcurrentRoots(RootCallback* callback, void* arg) {
991  thread_list_->VisitRoots(callback, arg);
992  VisitNonThreadRoots(callback, arg);
993}
994
995void Runtime::VisitRoots(RootCallback* callback, void* arg, VisitRootFlags flags) {
996  VisitNonConcurrentRoots(callback, arg);
997  VisitConcurrentRoots(callback, arg, flags);
998}
999
1000mirror::ObjectArray<mirror::ArtMethod>* Runtime::CreateDefaultImt(ClassLinker* cl) {
1001  Thread* self = Thread::Current();
1002  StackHandleScope<1> hs(self);
1003  Handle<mirror::ObjectArray<mirror::ArtMethod>> imtable(
1004      hs.NewHandle(cl->AllocArtMethodArray(self, 64)));
1005  mirror::ArtMethod* imt_conflict_method = Runtime::Current()->GetImtConflictMethod();
1006  for (size_t i = 0; i < static_cast<size_t>(imtable->GetLength()); i++) {
1007    imtable->Set<false>(i, imt_conflict_method);
1008  }
1009  return imtable.Get();
1010}
1011
1012mirror::ArtMethod* Runtime::CreateImtConflictMethod() {
1013  Thread* self = Thread::Current();
1014  Runtime* runtime = Runtime::Current();
1015  ClassLinker* class_linker = runtime->GetClassLinker();
1016  StackHandleScope<1> hs(self);
1017  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1018  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1019  // TODO: use a special method for imt conflict method saves.
1020  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1021  // When compiling, the code pointer will get set later when the image is loaded.
1022  if (runtime->IsCompiler()) {
1023    method->SetEntryPointFromPortableCompiledCode(nullptr);
1024    method->SetEntryPointFromQuickCompiledCode(nullptr);
1025  } else {
1026    method->SetEntryPointFromPortableCompiledCode(class_linker->GetPortableImtConflictTrampoline());
1027    method->SetEntryPointFromQuickCompiledCode(class_linker->GetQuickImtConflictTrampoline());
1028  }
1029  return method.Get();
1030}
1031
1032mirror::ArtMethod* Runtime::CreateResolutionMethod() {
1033  Thread* self = Thread::Current();
1034  Runtime* runtime = Runtime::Current();
1035  ClassLinker* class_linker = runtime->GetClassLinker();
1036  StackHandleScope<1> hs(self);
1037  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1038  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1039  // TODO: use a special method for resolution method saves
1040  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1041  // When compiling, the code pointer will get set later when the image is loaded.
1042  if (runtime->IsCompiler()) {
1043    method->SetEntryPointFromPortableCompiledCode(nullptr);
1044    method->SetEntryPointFromQuickCompiledCode(nullptr);
1045  } else {
1046    method->SetEntryPointFromPortableCompiledCode(class_linker->GetPortableResolutionTrampoline());
1047    method->SetEntryPointFromQuickCompiledCode(class_linker->GetQuickResolutionTrampoline());
1048  }
1049  return method.Get();
1050}
1051
1052mirror::ArtMethod* Runtime::CreateCalleeSaveMethod(CalleeSaveType type) {
1053  Thread* self = Thread::Current();
1054  Runtime* runtime = Runtime::Current();
1055  ClassLinker* class_linker = runtime->GetClassLinker();
1056  StackHandleScope<1> hs(self);
1057  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1058  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1059  // TODO: use a special method for callee saves
1060  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1061  method->SetEntryPointFromPortableCompiledCode(nullptr);
1062  method->SetEntryPointFromQuickCompiledCode(nullptr);
1063  DCHECK_NE(instruction_set_, kNone);
1064  return method.Get();
1065}
1066
1067void Runtime::DisallowNewSystemWeaks() {
1068  monitor_list_->DisallowNewMonitors();
1069  intern_table_->DisallowNewInterns();
1070  java_vm_->DisallowNewWeakGlobals();
1071}
1072
1073void Runtime::AllowNewSystemWeaks() {
1074  monitor_list_->AllowNewMonitors();
1075  intern_table_->AllowNewInterns();
1076  java_vm_->AllowNewWeakGlobals();
1077}
1078
1079void Runtime::SetInstructionSet(InstructionSet instruction_set) {
1080  instruction_set_ = instruction_set;
1081  if ((instruction_set_ == kThumb2) || (instruction_set_ == kArm)) {
1082    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1083      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1084      callee_save_method_frame_infos_[i] = arm::ArmCalleeSaveMethodFrameInfo(type);
1085    }
1086  } else if (instruction_set_ == kMips) {
1087    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1088      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1089      callee_save_method_frame_infos_[i] = mips::MipsCalleeSaveMethodFrameInfo(type);
1090    }
1091  } else if (instruction_set_ == kX86) {
1092    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1093      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1094      callee_save_method_frame_infos_[i] = x86::X86CalleeSaveMethodFrameInfo(type);
1095    }
1096  } else if (instruction_set_ == kX86_64) {
1097    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1098      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1099      callee_save_method_frame_infos_[i] = x86_64::X86_64CalleeSaveMethodFrameInfo(type);
1100    }
1101  } else if (instruction_set_ == kArm64) {
1102    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1103      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1104      callee_save_method_frame_infos_[i] = arm64::Arm64CalleeSaveMethodFrameInfo(type);
1105    }
1106  } else {
1107    UNIMPLEMENTED(FATAL) << instruction_set_;
1108  }
1109}
1110
1111void Runtime::SetCalleeSaveMethod(mirror::ArtMethod* method, CalleeSaveType type) {
1112  DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastCalleeSaveType));
1113  callee_save_methods_[type] = GcRoot<mirror::ArtMethod>(method);
1114}
1115
1116const std::vector<const DexFile*>& Runtime::GetCompileTimeClassPath(jobject class_loader) {
1117  if (class_loader == NULL) {
1118    return GetClassLinker()->GetBootClassPath();
1119  }
1120  CHECK(UseCompileTimeClassPath());
1121  CompileTimeClassPaths::const_iterator it = compile_time_class_paths_.find(class_loader);
1122  CHECK(it != compile_time_class_paths_.end());
1123  return it->second;
1124}
1125
1126void Runtime::SetCompileTimeClassPath(jobject class_loader,
1127                                      std::vector<const DexFile*>& class_path) {
1128  CHECK(!IsStarted());
1129  use_compile_time_class_path_ = true;
1130  compile_time_class_paths_.Put(class_loader, class_path);
1131}
1132
1133void Runtime::AddMethodVerifier(verifier::MethodVerifier* verifier) {
1134  DCHECK(verifier != nullptr);
1135  MutexLock mu(Thread::Current(), method_verifier_lock_);
1136  method_verifiers_.insert(verifier);
1137}
1138
1139void Runtime::RemoveMethodVerifier(verifier::MethodVerifier* verifier) {
1140  DCHECK(verifier != nullptr);
1141  MutexLock mu(Thread::Current(), method_verifier_lock_);
1142  auto it = method_verifiers_.find(verifier);
1143  CHECK(it != method_verifiers_.end());
1144  method_verifiers_.erase(it);
1145}
1146
1147void Runtime::StartProfiler(const char* profile_output_filename) {
1148  profile_output_filename_ = profile_output_filename;
1149  profiler_started_ =
1150    BackgroundMethodSamplingProfiler::Start(profile_output_filename_, profiler_options_);
1151}
1152
1153// Transaction support.
1154void Runtime::EnterTransactionMode(Transaction* transaction) {
1155  DCHECK(IsCompiler());
1156  DCHECK(transaction != nullptr);
1157  DCHECK(!IsActiveTransaction());
1158  preinitialization_transaction_ = transaction;
1159}
1160
1161void Runtime::ExitTransactionMode() {
1162  DCHECK(IsCompiler());
1163  DCHECK(IsActiveTransaction());
1164  preinitialization_transaction_ = nullptr;
1165}
1166
1167void Runtime::RecordWriteField32(mirror::Object* obj, MemberOffset field_offset,
1168                                 uint32_t value, bool is_volatile) const {
1169  DCHECK(IsCompiler());
1170  DCHECK(IsActiveTransaction());
1171  preinitialization_transaction_->RecordWriteField32(obj, field_offset, value, is_volatile);
1172}
1173
1174void Runtime::RecordWriteField64(mirror::Object* obj, MemberOffset field_offset,
1175                                 uint64_t value, bool is_volatile) const {
1176  DCHECK(IsCompiler());
1177  DCHECK(IsActiveTransaction());
1178  preinitialization_transaction_->RecordWriteField64(obj, field_offset, value, is_volatile);
1179}
1180
1181void Runtime::RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset,
1182                                        mirror::Object* value, bool is_volatile) const {
1183  DCHECK(IsCompiler());
1184  DCHECK(IsActiveTransaction());
1185  preinitialization_transaction_->RecordWriteFieldReference(obj, field_offset, value, is_volatile);
1186}
1187
1188void Runtime::RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const {
1189  DCHECK(IsCompiler());
1190  DCHECK(IsActiveTransaction());
1191  preinitialization_transaction_->RecordWriteArray(array, index, value);
1192}
1193
1194void Runtime::RecordStrongStringInsertion(mirror::String* s, uint32_t hash_code) const {
1195  DCHECK(IsCompiler());
1196  DCHECK(IsActiveTransaction());
1197  preinitialization_transaction_->RecordStrongStringInsertion(s, hash_code);
1198}
1199
1200void Runtime::RecordWeakStringInsertion(mirror::String* s, uint32_t hash_code) const {
1201  DCHECK(IsCompiler());
1202  DCHECK(IsActiveTransaction());
1203  preinitialization_transaction_->RecordWeakStringInsertion(s, hash_code);
1204}
1205
1206void Runtime::RecordStrongStringRemoval(mirror::String* s, uint32_t hash_code) const {
1207  DCHECK(IsCompiler());
1208  DCHECK(IsActiveTransaction());
1209  preinitialization_transaction_->RecordStrongStringRemoval(s, hash_code);
1210}
1211
1212void Runtime::RecordWeakStringRemoval(mirror::String* s, uint32_t hash_code) const {
1213  DCHECK(IsCompiler());
1214  DCHECK(IsActiveTransaction());
1215  preinitialization_transaction_->RecordWeakStringRemoval(s, hash_code);
1216}
1217
1218void Runtime::SetFaultMessage(const std::string& message) {
1219  MutexLock mu(Thread::Current(), fault_message_lock_);
1220  fault_message_ = message;
1221}
1222
1223void Runtime::AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* argv)
1224    const {
1225  if (GetInstrumentation()->InterpretOnly()) {
1226    argv->push_back("--compiler-filter=interpret-only");
1227  }
1228
1229  // Make the dex2oat instruction set match that of the launching runtime. If we have multiple
1230  // architecture support, dex2oat may be compiled as a different instruction-set than that
1231  // currently being executed.
1232  std::string instruction_set("--instruction-set=");
1233  instruction_set += GetInstructionSetString(kRuntimeISA);
1234  argv->push_back(instruction_set);
1235
1236  std::string features("--instruction-set-features=");
1237  features += GetDefaultInstructionSetFeatures();
1238  argv->push_back(features);
1239}
1240
1241void Runtime::UpdateProfilerState(int state) {
1242  VLOG(profiler) << "Profiler state updated to " << state;
1243}
1244}  // namespace art
1245