runtime.cc revision 4eb1331f912d6c3614bd65845fa046fc8d3300d8 
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/space.h"
53#include "image.h"
54#include "instrumentation.h"
55#include "intern_table.h"
56#include "jni_internal.h"
57#include "mirror/art_field-inl.h"
58#include "mirror/art_method-inl.h"
59#include "mirror/array.h"
60#include "mirror/class-inl.h"
61#include "mirror/class_loader.h"
62#include "mirror/stack_trace_element.h"
63#include "mirror/throwable.h"
64#include "monitor.h"
65#include "parsed_options.h"
66#include "oat_file.h"
67#include "quick/quick_method_frame_info.h"
68#include "reflection.h"
69#include "ScopedLocalRef.h"
70#include "scoped_thread_state_change.h"
71#include "signal_catcher.h"
72#include "signal_set.h"
73#include "handle_scope-inl.h"
74#include "thread.h"
75#include "thread_list.h"
76#include "trace.h"
77#include "transaction.h"
78#include "profiler.h"
79#include "verifier/method_verifier.h"
80#include "well_known_classes.h"
81
82#include "JniConstants.h"  // Last to avoid LOG redefinition in ics-mr1-plus-art.
83
84#ifdef HAVE_ANDROID_OS
85#include "cutils/properties.h"
86#endif
87
88namespace art {
89
90static constexpr bool kEnableJavaStackTraceHandler = true;
91const char* Runtime::kDefaultInstructionSetFeatures =
92    STRINGIFY(ART_DEFAULT_INSTRUCTION_SET_FEATURES);
93Runtime* Runtime::instance_ = NULL;
94
95Runtime::Runtime()
96    : pre_allocated_OutOfMemoryError_(nullptr),
97      resolution_method_(nullptr),
98      imt_conflict_method_(nullptr),
99      default_imt_(nullptr),
100      instruction_set_(kNone),
101      compiler_callbacks_(nullptr),
102      is_zygote_(false),
103      is_concurrent_gc_enabled_(true),
104      is_explicit_gc_disabled_(false),
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  for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
145    callee_save_methods_[i] = nullptr;
146  }
147}
148
149Runtime::~Runtime() {
150  if (dump_gc_performance_on_shutdown_) {
151    // This can't be called from the Heap destructor below because it
152    // could call RosAlloc::InspectAll() which needs the thread_list
153    // to be still alive.
154    heap_->DumpGcPerformanceInfo(LOG(INFO));
155  }
156
157  Thread* self = Thread::Current();
158  {
159    MutexLock mu(self, *Locks::runtime_shutdown_lock_);
160    shutting_down_started_ = true;
161    while (threads_being_born_ > 0) {
162      shutdown_cond_->Wait(self);
163    }
164    shutting_down_ = true;
165  }
166  // Shut down background profiler before the runtime exits.
167  if (profiler_started_) {
168    BackgroundMethodSamplingProfiler::Shutdown();
169  }
170
171  Trace::Shutdown();
172
173  // Make sure to let the GC complete if it is running.
174  heap_->WaitForGcToComplete(gc::kGcCauseBackground, self);
175  heap_->DeleteThreadPool();
176
177  // Make sure our internal threads are dead before we start tearing down things they're using.
178  Dbg::StopJdwp();
179  delete signal_catcher_;
180
181  // Make sure all other non-daemon threads have terminated, and all daemon threads are suspended.
182  delete thread_list_;
183  delete monitor_list_;
184  delete monitor_pool_;
185  delete class_linker_;
186  delete heap_;
187  delete intern_table_;
188  delete java_vm_;
189  Thread::Shutdown();
190  QuasiAtomic::Shutdown();
191  verifier::MethodVerifier::Shutdown();
192  // TODO: acquire a static mutex on Runtime to avoid racing.
193  CHECK(instance_ == nullptr || instance_ == this);
194  instance_ = nullptr;
195
196  delete null_pointer_handler_;
197  delete suspend_handler_;
198  delete stack_overflow_handler_;
199}
200
201struct AbortState {
202  void Dump(std::ostream& os) NO_THREAD_SAFETY_ANALYSIS {
203    if (gAborting > 1) {
204      os << "Runtime aborting --- recursively, so no thread-specific detail!\n";
205      return;
206    }
207    gAborting++;
208    os << "Runtime aborting...\n";
209    if (Runtime::Current() == NULL) {
210      os << "(Runtime does not yet exist!)\n";
211      return;
212    }
213    Thread* self = Thread::Current();
214    if (self == nullptr) {
215      os << "(Aborting thread was not attached to runtime!)\n";
216      DumpKernelStack(os, GetTid(), "  kernel: ", false);
217      DumpNativeStack(os, GetTid(), "  native: ", nullptr);
218    } else {
219      os << "Aborting thread:\n";
220      if (Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)) {
221        DumpThread(os, self);
222      } else {
223        if (Locks::mutator_lock_->SharedTryLock(self)) {
224          DumpThread(os, self);
225          Locks::mutator_lock_->SharedUnlock(self);
226        }
227      }
228    }
229    DumpAllThreads(os, self);
230  }
231
232  void DumpThread(std::ostream& os, Thread* self) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
233    self->Dump(os);
234    if (self->IsExceptionPending()) {
235      ThrowLocation throw_location;
236      mirror::Throwable* exception = self->GetException(&throw_location);
237      os << "Pending exception " << PrettyTypeOf(exception)
238          << " thrown by '" << throw_location.Dump() << "'\n"
239          << exception->Dump();
240    }
241  }
242
243  void DumpAllThreads(std::ostream& os, Thread* self) NO_THREAD_SAFETY_ANALYSIS {
244    bool tll_already_held = Locks::thread_list_lock_->IsExclusiveHeld(self);
245    bool ml_already_held = Locks::mutator_lock_->IsSharedHeld(self);
246    if (!tll_already_held || !ml_already_held) {
247      os << "Dumping all threads without appropriate locks held:"
248          << (!tll_already_held ? " thread list lock" : "")
249          << (!ml_already_held ? " mutator lock" : "")
250          << "\n";
251    }
252    os << "All threads:\n";
253    Runtime::Current()->GetThreadList()->DumpLocked(os);
254  }
255};
256
257void Runtime::Abort() {
258  gAborting++;  // set before taking any locks
259
260  // Ensure that we don't have multiple threads trying to abort at once,
261  // which would result in significantly worse diagnostics.
262  MutexLock mu(Thread::Current(), *Locks::abort_lock_);
263
264  // Get any pending output out of the way.
265  fflush(NULL);
266
267  // Many people have difficulty distinguish aborts from crashes,
268  // so be explicit.
269  AbortState state;
270  LOG(INTERNAL_FATAL) << Dumpable<AbortState>(state);
271
272  // Call the abort hook if we have one.
273  if (Runtime::Current() != NULL && Runtime::Current()->abort_ != NULL) {
274    LOG(INTERNAL_FATAL) << "Calling abort hook...";
275    Runtime::Current()->abort_();
276    // notreached
277    LOG(INTERNAL_FATAL) << "Unexpectedly returned from abort hook!";
278  }
279
280#if defined(__GLIBC__)
281  // TODO: we ought to be able to use pthread_kill(3) here (or abort(3),
282  // which POSIX defines in terms of raise(3), which POSIX defines in terms
283  // of pthread_kill(3)). On Linux, though, libcorkscrew can't unwind through
284  // libpthread, which means the stacks we dump would be useless. Calling
285  // tgkill(2) directly avoids that.
286  syscall(__NR_tgkill, getpid(), GetTid(), SIGABRT);
287  // TODO: LLVM installs it's own SIGABRT handler so exit to be safe... Can we disable that in LLVM?
288  // If not, we could use sigaction(3) before calling tgkill(2) and lose this call to exit(3).
289  exit(1);
290#else
291  abort();
292#endif
293  // notreached
294}
295
296void Runtime::PreZygoteFork() {
297  heap_->PreZygoteFork();
298}
299
300void Runtime::CallExitHook(jint status) {
301  if (exit_ != NULL) {
302    ScopedThreadStateChange tsc(Thread::Current(), kNative);
303    exit_(status);
304    LOG(WARNING) << "Exit hook returned instead of exiting!";
305  }
306}
307
308void Runtime::SweepSystemWeaks(IsMarkedCallback* visitor, void* arg) {
309  GetInternTable()->SweepInternTableWeaks(visitor, arg);
310  GetMonitorList()->SweepMonitorList(visitor, arg);
311  GetJavaVM()->SweepJniWeakGlobals(visitor, arg);
312}
313
314bool Runtime::Create(const Options& options, bool ignore_unrecognized) {
315  // TODO: acquire a static mutex on Runtime to avoid racing.
316  if (Runtime::instance_ != NULL) {
317    return false;
318  }
319  InitLogging(NULL);  // Calls Locks::Init() as a side effect.
320  instance_ = new Runtime;
321  if (!instance_->Init(options, ignore_unrecognized)) {
322    delete instance_;
323    instance_ = NULL;
324    return false;
325  }
326  return true;
327}
328
329jobject CreateSystemClassLoader() {
330  if (Runtime::Current()->UseCompileTimeClassPath()) {
331    return NULL;
332  }
333
334  ScopedObjectAccess soa(Thread::Current());
335  ClassLinker* cl = Runtime::Current()->GetClassLinker();
336
337  StackHandleScope<3> hs(soa.Self());
338  Handle<mirror::Class> class_loader_class(
339      hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_ClassLoader)));
340  CHECK(cl->EnsureInitialized(class_loader_class, true, true));
341
342  mirror::ArtMethod* getSystemClassLoader =
343      class_loader_class->FindDirectMethod("getSystemClassLoader", "()Ljava/lang/ClassLoader;");
344  CHECK(getSystemClassLoader != NULL);
345
346  JValue result = InvokeWithJValues(soa, nullptr, soa.EncodeMethod(getSystemClassLoader), nullptr);
347  Handle<mirror::ClassLoader> class_loader(
348      hs.NewHandle(down_cast<mirror::ClassLoader*>(result.GetL())));
349  CHECK(class_loader.Get() != nullptr);
350  JNIEnv* env = soa.Self()->GetJniEnv();
351  ScopedLocalRef<jobject> system_class_loader(env,
352                                              soa.AddLocalReference<jobject>(class_loader.Get()));
353  CHECK(system_class_loader.get() != nullptr);
354
355  soa.Self()->SetClassLoaderOverride(class_loader.Get());
356
357  Handle<mirror::Class> thread_class(
358      hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_Thread)));
359  CHECK(cl->EnsureInitialized(thread_class, true, true));
360
361  mirror::ArtField* contextClassLoader =
362      thread_class->FindDeclaredInstanceField("contextClassLoader", "Ljava/lang/ClassLoader;");
363  CHECK(contextClassLoader != NULL);
364
365  // We can't run in a transaction yet.
366  contextClassLoader->SetObject<false>(soa.Self()->GetPeer(), class_loader.Get());
367
368  return env->NewGlobalRef(system_class_loader.get());
369}
370
371std::string Runtime::GetCompilerExecutable() const {
372  if (!compiler_executable_.empty()) {
373    return compiler_executable_;
374  }
375  std::string compiler_executable(GetAndroidRoot());
376  compiler_executable += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat");
377  return compiler_executable;
378}
379
380bool Runtime::Start() {
381  VLOG(startup) << "Runtime::Start entering";
382
383  // Restore main thread state to kNative as expected by native code.
384  Thread* self = Thread::Current();
385  self->TransitionFromRunnableToSuspended(kNative);
386
387  started_ = true;
388
389  // InitNativeMethods needs to be after started_ so that the classes
390  // it touches will have methods linked to the oat file if necessary.
391  InitNativeMethods();
392
393  // Initialize well known thread group values that may be accessed threads while attaching.
394  InitThreadGroups(self);
395
396  Thread::FinishStartup();
397
398  if (is_zygote_) {
399    if (!InitZygote()) {
400      return false;
401    }
402  } else {
403    DidForkFromZygote();
404  }
405
406  StartDaemonThreads();
407
408  system_class_loader_ = CreateSystemClassLoader();
409
410  {
411    ScopedObjectAccess soa(self);
412    self->GetJniEnv()->locals.AssertEmpty();
413  }
414
415  VLOG(startup) << "Runtime::Start exiting";
416  finished_starting_ = true;
417
418  if (profiler_options_.IsEnabled() && !profile_output_filename_.empty()) {
419    // User has asked for a profile using -Xenable-profiler.
420    // Create the profile file if it doesn't exist.
421    int fd = open(profile_output_filename_.c_str(), O_RDWR|O_CREAT|O_EXCL, 0660);
422    if (fd >= 0) {
423      close(fd);
424    }
425    StartProfiler(profile_output_filename_.c_str());
426  }
427
428  return true;
429}
430
431void Runtime::EndThreadBirth() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) {
432  DCHECK_GT(threads_being_born_, 0U);
433  threads_being_born_--;
434  if (shutting_down_started_ && threads_being_born_ == 0) {
435    shutdown_cond_->Broadcast(Thread::Current());
436  }
437}
438
439// Do zygote-mode-only initialization.
440bool Runtime::InitZygote() {
441#ifdef __linux__
442  // zygote goes into its own process group
443  setpgid(0, 0);
444
445  // See storage config details at http://source.android.com/tech/storage/
446  // Create private mount namespace shared by all children
447  if (unshare(CLONE_NEWNS) == -1) {
448    PLOG(WARNING) << "Failed to unshare()";
449    return false;
450  }
451
452  // Mark rootfs as being a slave so that changes from default
453  // namespace only flow into our children.
454  if (mount("rootfs", "/", NULL, (MS_SLAVE | MS_REC), NULL) == -1) {
455    PLOG(WARNING) << "Failed to mount() rootfs as MS_SLAVE";
456    return false;
457  }
458
459  // Create a staging tmpfs that is shared by our children; they will
460  // bind mount storage into their respective private namespaces, which
461  // are isolated from each other.
462  const char* target_base = getenv("EMULATED_STORAGE_TARGET");
463  if (target_base != NULL) {
464    if (mount("tmpfs", target_base, "tmpfs", MS_NOSUID | MS_NODEV,
465              "uid=0,gid=1028,mode=0751") == -1) {
466      LOG(WARNING) << "Failed to mount tmpfs to " << target_base;
467      return false;
468    }
469  }
470
471  return true;
472#else
473  UNIMPLEMENTED(FATAL);
474  return false;
475#endif
476}
477
478void Runtime::DidForkFromZygote() {
479  is_zygote_ = false;
480
481  // Create the thread pool.
482  heap_->CreateThreadPool();
483
484  StartSignalCatcher();
485
486  // Start the JDWP thread. If the command-line debugger flags specified "suspend=y",
487  // this will pause the runtime, so we probably want this to come last.
488  Dbg::StartJdwp();
489}
490
491void Runtime::StartSignalCatcher() {
492  if (!is_zygote_) {
493    signal_catcher_ = new SignalCatcher(stack_trace_file_);
494  }
495}
496
497bool Runtime::IsShuttingDown(Thread* self) {
498  MutexLock mu(self, *Locks::runtime_shutdown_lock_);
499  return IsShuttingDownLocked();
500}
501
502void Runtime::StartDaemonThreads() {
503  VLOG(startup) << "Runtime::StartDaemonThreads entering";
504
505  Thread* self = Thread::Current();
506
507  // Must be in the kNative state for calling native methods.
508  CHECK_EQ(self->GetState(), kNative);
509
510  JNIEnv* env = self->GetJniEnv();
511  env->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons,
512                            WellKnownClasses::java_lang_Daemons_start);
513  if (env->ExceptionCheck()) {
514    env->ExceptionDescribe();
515    LOG(FATAL) << "Error starting java.lang.Daemons";
516  }
517
518  VLOG(startup) << "Runtime::StartDaemonThreads exiting";
519}
520
521bool Runtime::Init(const Options& raw_options, bool ignore_unrecognized) {
522  CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize);
523
524  std::unique_ptr<ParsedOptions> options(ParsedOptions::Create(raw_options, ignore_unrecognized));
525  if (options.get() == NULL) {
526    LOG(ERROR) << "Failed to parse options";
527    return false;
528  }
529  VLOG(startup) << "Runtime::Init -verbose:startup enabled";
530
531  QuasiAtomic::Startup();
532
533  Monitor::Init(options->lock_profiling_threshold_, options->hook_is_sensitive_thread_);
534
535  boot_class_path_string_ = options->boot_class_path_string_;
536  class_path_string_ = options->class_path_string_;
537  properties_ = options->properties_;
538
539  compiler_callbacks_ = options->compiler_callbacks_;
540  is_zygote_ = options->is_zygote_;
541  is_explicit_gc_disabled_ = options->is_explicit_gc_disabled_;
542
543  vfprintf_ = options->hook_vfprintf_;
544  exit_ = options->hook_exit_;
545  abort_ = options->hook_abort_;
546
547  default_stack_size_ = options->stack_size_;
548  stack_trace_file_ = options->stack_trace_file_;
549
550  compiler_executable_ = options->compiler_executable_;
551  compiler_options_ = options->compiler_options_;
552  image_compiler_options_ = options->image_compiler_options_;
553
554  max_spins_before_thin_lock_inflation_ = options->max_spins_before_thin_lock_inflation_;
555
556  monitor_list_ = new MonitorList;
557  monitor_pool_ = MonitorPool::Create();
558  thread_list_ = new ThreadList;
559  intern_table_ = new InternTable;
560
561  verify_ = options->verify_;
562
563  if (options->interpreter_only_) {
564    GetInstrumentation()->ForceInterpretOnly();
565  }
566
567  bool implicit_checks_supported = false;
568  switch (kRuntimeISA) {
569    case kArm:
570    case kThumb2:
571      implicit_checks_supported = true;
572      break;
573    default:
574      break;
575  }
576
577  if (!options->interpreter_only_ && implicit_checks_supported &&
578      (options->explicit_checks_ != (ParsedOptions::kExplicitSuspendCheck |
579          ParsedOptions::kExplicitNullCheck |
580          ParsedOptions::kExplicitStackOverflowCheck) || kEnableJavaStackTraceHandler)) {
581    fault_manager.Init();
582
583    // These need to be in a specific order.  The null point check handler must be
584    // after the suspend check and stack overflow check handlers.
585    if ((options->explicit_checks_ & ParsedOptions::kExplicitSuspendCheck) == 0) {
586      suspend_handler_ = new SuspensionHandler(&fault_manager);
587    }
588
589    if ((options->explicit_checks_ & ParsedOptions::kExplicitStackOverflowCheck) == 0) {
590      stack_overflow_handler_ = new StackOverflowHandler(&fault_manager);
591    }
592
593    if ((options->explicit_checks_ & ParsedOptions::kExplicitNullCheck) == 0) {
594      null_pointer_handler_ = new NullPointerHandler(&fault_manager);
595    }
596
597    if (kEnableJavaStackTraceHandler) {
598      new JavaStackTraceHandler(&fault_manager);
599    }
600  }
601
602  heap_ = new gc::Heap(options->heap_initial_size_,
603                       options->heap_growth_limit_,
604                       options->heap_min_free_,
605                       options->heap_max_free_,
606                       options->heap_target_utilization_,
607                       options->foreground_heap_growth_multiplier_,
608                       options->heap_maximum_size_,
609                       options->image_,
610                       options->image_isa_,
611                       options->collector_type_,
612                       options->background_collector_type_,
613                       options->parallel_gc_threads_,
614                       options->conc_gc_threads_,
615                       options->low_memory_mode_,
616                       options->long_pause_log_threshold_,
617                       options->long_gc_log_threshold_,
618                       options->ignore_max_footprint_,
619                       options->use_tlab_,
620                       options->verify_pre_gc_heap_,
621                       options->verify_pre_sweeping_heap_,
622                       options->verify_post_gc_heap_,
623                       options->verify_pre_gc_rosalloc_,
624                       options->verify_pre_sweeping_rosalloc_,
625                       options->verify_post_gc_rosalloc_);
626
627  dump_gc_performance_on_shutdown_ = options->dump_gc_performance_on_shutdown_;
628
629  BlockSignals();
630  InitPlatformSignalHandlers();
631
632  java_vm_ = new JavaVMExt(this, options.get());
633
634  Thread::Startup();
635
636  // ClassLinker needs an attached thread, but we can't fully attach a thread without creating
637  // objects. We can't supply a thread group yet; it will be fixed later. Since we are the main
638  // thread, we do not get a java peer.
639  Thread* self = Thread::Attach("main", false, NULL, false);
640  CHECK_EQ(self->GetThreadId(), ThreadList::kMainThreadId);
641  CHECK(self != NULL);
642
643  // Set us to runnable so tools using a runtime can allocate and GC by default
644  self->TransitionFromSuspendedToRunnable();
645
646  // Now we're attached, we can take the heap locks and validate the heap.
647  GetHeap()->EnableObjectValidation();
648
649  CHECK_GE(GetHeap()->GetContinuousSpaces().size(), 1U);
650  class_linker_ = new ClassLinker(intern_table_);
651  if (GetHeap()->HasImageSpace()) {
652    class_linker_->InitFromImage();
653    if (kIsDebugBuild) {
654      GetHeap()->GetImageSpace()->VerifyImageAllocations();
655    }
656  } else {
657    CHECK(options->boot_class_path_ != NULL);
658    CHECK_NE(options->boot_class_path_->size(), 0U);
659    class_linker_->InitFromCompiler(*options->boot_class_path_);
660  }
661  CHECK(class_linker_ != NULL);
662  verifier::MethodVerifier::Init();
663
664  method_trace_ = options->method_trace_;
665  method_trace_file_ = options->method_trace_file_;
666  method_trace_file_size_ = options->method_trace_file_size_;
667
668  profile_output_filename_ = options->profile_output_filename_;
669  profiler_options_ = options->profiler_options_;
670
671  // TODO: move this to just be an Trace::Start argument
672  Trace::SetDefaultClockSource(options->profile_clock_source_);
673
674  if (options->method_trace_) {
675    Trace::Start(options->method_trace_file_.c_str(), -1, options->method_trace_file_size_, 0,
676                 false, false, 0);
677  }
678
679  // Pre-allocate an OutOfMemoryError for the double-OOME case.
680  self->ThrowNewException(ThrowLocation(), "Ljava/lang/OutOfMemoryError;",
681                          "OutOfMemoryError thrown while trying to throw OutOfMemoryError; "
682                          "no stack available");
683  pre_allocated_OutOfMemoryError_ = self->GetException(NULL);
684  self->ClearException();
685
686  VLOG(startup) << "Runtime::Init exiting";
687  return true;
688}
689
690void Runtime::InitNativeMethods() {
691  VLOG(startup) << "Runtime::InitNativeMethods entering";
692  Thread* self = Thread::Current();
693  JNIEnv* env = self->GetJniEnv();
694
695  // Must be in the kNative state for calling native methods (JNI_OnLoad code).
696  CHECK_EQ(self->GetState(), kNative);
697
698  // First set up JniConstants, which is used by both the runtime's built-in native
699  // methods and libcore.
700  JniConstants::init(env);
701  WellKnownClasses::Init(env);
702
703  // Then set up the native methods provided by the runtime itself.
704  RegisterRuntimeNativeMethods(env);
705
706  // Then set up libcore, which is just a regular JNI library with a regular JNI_OnLoad.
707  // Most JNI libraries can just use System.loadLibrary, but libcore can't because it's
708  // the library that implements System.loadLibrary!
709  {
710    std::string mapped_name(StringPrintf(OS_SHARED_LIB_FORMAT_STR, "javacore"));
711    std::string reason;
712    self->TransitionFromSuspendedToRunnable();
713    StackHandleScope<1> hs(self);
714    auto class_loader(hs.NewHandle<mirror::ClassLoader>(nullptr));
715    if (!instance_->java_vm_->LoadNativeLibrary(mapped_name, class_loader, &reason)) {
716      LOG(FATAL) << "LoadNativeLibrary failed for \"" << mapped_name << "\": " << reason;
717    }
718    self->TransitionFromRunnableToSuspended(kNative);
719  }
720
721  // Initialize well known classes that may invoke runtime native methods.
722  WellKnownClasses::LateInit(env);
723
724  VLOG(startup) << "Runtime::InitNativeMethods exiting";
725}
726
727void Runtime::InitThreadGroups(Thread* self) {
728  JNIEnvExt* env = self->GetJniEnv();
729  ScopedJniEnvLocalRefState env_state(env);
730  main_thread_group_ =
731      env->NewGlobalRef(env->GetStaticObjectField(
732          WellKnownClasses::java_lang_ThreadGroup,
733          WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup));
734  CHECK(main_thread_group_ != NULL || IsCompiler());
735  system_thread_group_ =
736      env->NewGlobalRef(env->GetStaticObjectField(
737          WellKnownClasses::java_lang_ThreadGroup,
738          WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup));
739  CHECK(system_thread_group_ != NULL || IsCompiler());
740}
741
742jobject Runtime::GetMainThreadGroup() const {
743  CHECK(main_thread_group_ != NULL || IsCompiler());
744  return main_thread_group_;
745}
746
747jobject Runtime::GetSystemThreadGroup() const {
748  CHECK(system_thread_group_ != NULL || IsCompiler());
749  return system_thread_group_;
750}
751
752jobject Runtime::GetSystemClassLoader() const {
753  CHECK(system_class_loader_ != NULL || IsCompiler());
754  return system_class_loader_;
755}
756
757void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) {
758#define REGISTER(FN) extern void FN(JNIEnv*); FN(env)
759  // Register Throwable first so that registration of other native methods can throw exceptions
760  REGISTER(register_java_lang_Throwable);
761  REGISTER(register_dalvik_system_DexFile);
762  REGISTER(register_dalvik_system_VMDebug);
763  REGISTER(register_dalvik_system_VMRuntime);
764  REGISTER(register_dalvik_system_VMStack);
765  REGISTER(register_dalvik_system_ZygoteHooks);
766  REGISTER(register_java_lang_Class);
767  REGISTER(register_java_lang_DexCache);
768  REGISTER(register_java_lang_Object);
769  REGISTER(register_java_lang_Runtime);
770  REGISTER(register_java_lang_String);
771  REGISTER(register_java_lang_System);
772  REGISTER(register_java_lang_Thread);
773  REGISTER(register_java_lang_VMClassLoader);
774  REGISTER(register_java_lang_ref_Reference);
775  REGISTER(register_java_lang_reflect_Array);
776  REGISTER(register_java_lang_reflect_Constructor);
777  REGISTER(register_java_lang_reflect_Field);
778  REGISTER(register_java_lang_reflect_Method);
779  REGISTER(register_java_lang_reflect_Proxy);
780  REGISTER(register_java_util_concurrent_atomic_AtomicLong);
781  REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmServer);
782  REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmVmInternal);
783  REGISTER(register_sun_misc_Unsafe);
784#undef REGISTER
785}
786
787void Runtime::DumpForSigQuit(std::ostream& os) {
788  GetClassLinker()->DumpForSigQuit(os);
789  GetInternTable()->DumpForSigQuit(os);
790  GetJavaVM()->DumpForSigQuit(os);
791  GetHeap()->DumpForSigQuit(os);
792  os << "\n";
793
794  thread_list_->DumpForSigQuit(os);
795  BaseMutex::DumpAll(os);
796}
797
798void Runtime::DumpLockHolders(std::ostream& os) {
799  uint64_t mutator_lock_owner = Locks::mutator_lock_->GetExclusiveOwnerTid();
800  pid_t thread_list_lock_owner = GetThreadList()->GetLockOwner();
801  pid_t classes_lock_owner = GetClassLinker()->GetClassesLockOwner();
802  pid_t dex_lock_owner = GetClassLinker()->GetDexLockOwner();
803  if ((thread_list_lock_owner | classes_lock_owner | dex_lock_owner) != 0) {
804    os << "Mutator lock exclusive owner tid: " << mutator_lock_owner << "\n"
805       << "ThreadList lock owner tid: " << thread_list_lock_owner << "\n"
806       << "ClassLinker classes lock owner tid: " << classes_lock_owner << "\n"
807       << "ClassLinker dex lock owner tid: " << dex_lock_owner << "\n";
808  }
809}
810
811void Runtime::SetStatsEnabled(bool new_state) {
812  if (new_state == true) {
813    GetStats()->Clear(~0);
814    // TODO: wouldn't it make more sense to clear _all_ threads' stats?
815    Thread::Current()->GetStats()->Clear(~0);
816    GetInstrumentation()->InstrumentQuickAllocEntryPoints();
817  } else {
818    GetInstrumentation()->UninstrumentQuickAllocEntryPoints();
819  }
820  stats_enabled_ = new_state;
821}
822
823void Runtime::ResetStats(int kinds) {
824  GetStats()->Clear(kinds & 0xffff);
825  // TODO: wouldn't it make more sense to clear _all_ threads' stats?
826  Thread::Current()->GetStats()->Clear(kinds >> 16);
827}
828
829int32_t Runtime::GetStat(int kind) {
830  RuntimeStats* stats;
831  if (kind < (1<<16)) {
832    stats = GetStats();
833  } else {
834    stats = Thread::Current()->GetStats();
835    kind >>= 16;
836  }
837  switch (kind) {
838  case KIND_ALLOCATED_OBJECTS:
839    return stats->allocated_objects;
840  case KIND_ALLOCATED_BYTES:
841    return stats->allocated_bytes;
842  case KIND_FREED_OBJECTS:
843    return stats->freed_objects;
844  case KIND_FREED_BYTES:
845    return stats->freed_bytes;
846  case KIND_GC_INVOCATIONS:
847    return stats->gc_for_alloc_count;
848  case KIND_CLASS_INIT_COUNT:
849    return stats->class_init_count;
850  case KIND_CLASS_INIT_TIME:
851    // Convert ns to us, reduce to 32 bits.
852    return static_cast<int>(stats->class_init_time_ns / 1000);
853  case KIND_EXT_ALLOCATED_OBJECTS:
854  case KIND_EXT_ALLOCATED_BYTES:
855  case KIND_EXT_FREED_OBJECTS:
856  case KIND_EXT_FREED_BYTES:
857    return 0;  // backward compatibility
858  default:
859    LOG(FATAL) << "Unknown statistic " << kind;
860    return -1;  // unreachable
861  }
862}
863
864void Runtime::BlockSignals() {
865  SignalSet signals;
866  signals.Add(SIGPIPE);
867  // SIGQUIT is used to dump the runtime's state (including stack traces).
868  signals.Add(SIGQUIT);
869  // SIGUSR1 is used to initiate a GC.
870  signals.Add(SIGUSR1);
871  signals.Block();
872}
873
874bool Runtime::AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group,
875                                  bool create_peer) {
876  bool success = Thread::Attach(thread_name, as_daemon, thread_group, create_peer) != NULL;
877  if (thread_name == NULL) {
878    LOG(WARNING) << *Thread::Current() << " attached without supplying a name";
879  }
880  return success;
881}
882
883void Runtime::DetachCurrentThread() {
884  Thread* self = Thread::Current();
885  if (self == NULL) {
886    LOG(FATAL) << "attempting to detach thread that is not attached";
887  }
888  if (self->HasManagedStack()) {
889    LOG(FATAL) << *Thread::Current() << " attempting to detach while still running code";
890  }
891  thread_list_->Unregister(self);
892}
893
894  mirror::Throwable* Runtime::GetPreAllocatedOutOfMemoryError() const {
895  if (pre_allocated_OutOfMemoryError_ == NULL) {
896    LOG(ERROR) << "Failed to return pre-allocated OOME";
897  }
898  return pre_allocated_OutOfMemoryError_;
899}
900
901void Runtime::VisitConstantRoots(RootCallback* callback, void* arg) {
902  // Visit the classes held as static in mirror classes, these can be visited concurrently and only
903  // need to be visited once per GC since they never change.
904  mirror::ArtField::VisitRoots(callback, arg);
905  mirror::ArtMethod::VisitRoots(callback, arg);
906  mirror::Class::VisitRoots(callback, arg);
907  mirror::StackTraceElement::VisitRoots(callback, arg);
908  mirror::String::VisitRoots(callback, arg);
909  mirror::Throwable::VisitRoots(callback, arg);
910  // Visit all the primitive array types classes.
911  mirror::PrimitiveArray<uint8_t>::VisitRoots(callback, arg);   // BooleanArray
912  mirror::PrimitiveArray<int8_t>::VisitRoots(callback, arg);    // ByteArray
913  mirror::PrimitiveArray<uint16_t>::VisitRoots(callback, arg);  // CharArray
914  mirror::PrimitiveArray<double>::VisitRoots(callback, arg);    // DoubleArray
915  mirror::PrimitiveArray<float>::VisitRoots(callback, arg);     // FloatArray
916  mirror::PrimitiveArray<int32_t>::VisitRoots(callback, arg);   // IntArray
917  mirror::PrimitiveArray<int64_t>::VisitRoots(callback, arg);   // LongArray
918  mirror::PrimitiveArray<int16_t>::VisitRoots(callback, arg);   // ShortArray
919}
920
921void Runtime::VisitConcurrentRoots(RootCallback* callback, void* arg, VisitRootFlags flags) {
922  intern_table_->VisitRoots(callback, arg, flags);
923  class_linker_->VisitRoots(callback, arg, flags);
924  Dbg::VisitRoots(callback, arg);
925  if ((flags & kVisitRootFlagNewRoots) == 0) {
926    // Guaranteed to have no new roots in the constant roots.
927    VisitConstantRoots(callback, arg);
928  }
929}
930
931void Runtime::VisitNonThreadRoots(RootCallback* callback, void* arg) {
932  java_vm_->VisitRoots(callback, arg);
933  if (pre_allocated_OutOfMemoryError_ != nullptr) {
934    callback(reinterpret_cast<mirror::Object**>(&pre_allocated_OutOfMemoryError_), arg, 0,
935             kRootVMInternal);
936    DCHECK(pre_allocated_OutOfMemoryError_ != nullptr);
937  }
938  callback(reinterpret_cast<mirror::Object**>(&resolution_method_), arg, 0, kRootVMInternal);
939  DCHECK(resolution_method_ != nullptr);
940  if (HasImtConflictMethod()) {
941    callback(reinterpret_cast<mirror::Object**>(&imt_conflict_method_), arg, 0, kRootVMInternal);
942  }
943  if (HasDefaultImt()) {
944    callback(reinterpret_cast<mirror::Object**>(&default_imt_), arg, 0, kRootVMInternal);
945  }
946  for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
947    if (callee_save_methods_[i] != nullptr) {
948      callback(reinterpret_cast<mirror::Object**>(&callee_save_methods_[i]), arg, 0,
949               kRootVMInternal);
950    }
951  }
952  {
953    MutexLock mu(Thread::Current(), method_verifier_lock_);
954    for (verifier::MethodVerifier* verifier : method_verifiers_) {
955      verifier->VisitRoots(callback, arg);
956    }
957  }
958  if (preinitialization_transaction_ != nullptr) {
959    preinitialization_transaction_->VisitRoots(callback, arg);
960  }
961  instrumentation_.VisitRoots(callback, arg);
962}
963
964void Runtime::VisitNonConcurrentRoots(RootCallback* callback, void* arg) {
965  thread_list_->VisitRoots(callback, arg);
966  VisitNonThreadRoots(callback, arg);
967}
968
969void Runtime::VisitRoots(RootCallback* callback, void* arg, VisitRootFlags flags) {
970  VisitNonConcurrentRoots(callback, arg);
971  VisitConcurrentRoots(callback, arg, flags);
972}
973
974mirror::ObjectArray<mirror::ArtMethod>* Runtime::CreateDefaultImt(ClassLinker* cl) {
975  Thread* self = Thread::Current();
976  StackHandleScope<1> hs(self);
977  Handle<mirror::ObjectArray<mirror::ArtMethod>> imtable(
978      hs.NewHandle(cl->AllocArtMethodArray(self, 64)));
979  mirror::ArtMethod* imt_conflict_method = Runtime::Current()->GetImtConflictMethod();
980  for (size_t i = 0; i < static_cast<size_t>(imtable->GetLength()); i++) {
981    imtable->Set<false>(i, imt_conflict_method);
982  }
983  return imtable.Get();
984}
985
986mirror::ArtMethod* Runtime::CreateImtConflictMethod() {
987  Thread* self = Thread::Current();
988  Runtime* runtime = Runtime::Current();
989  ClassLinker* class_linker = runtime->GetClassLinker();
990  StackHandleScope<1> hs(self);
991  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
992  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
993  // TODO: use a special method for imt conflict method saves.
994  method->SetDexMethodIndex(DexFile::kDexNoIndex);
995  // When compiling, the code pointer will get set later when the image is loaded.
996  if (runtime->IsCompiler()) {
997    method->SetEntryPointFromPortableCompiledCode(nullptr);
998    method->SetEntryPointFromQuickCompiledCode(nullptr);
999  } else {
1000    method->SetEntryPointFromPortableCompiledCode(GetPortableImtConflictTrampoline(class_linker));
1001    method->SetEntryPointFromQuickCompiledCode(GetQuickImtConflictTrampoline(class_linker));
1002  }
1003  return method.Get();
1004}
1005
1006mirror::ArtMethod* Runtime::CreateResolutionMethod() {
1007  Thread* self = Thread::Current();
1008  Runtime* runtime = Runtime::Current();
1009  ClassLinker* class_linker = runtime->GetClassLinker();
1010  StackHandleScope<1> hs(self);
1011  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1012  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1013  // TODO: use a special method for resolution method saves
1014  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1015  // When compiling, the code pointer will get set later when the image is loaded.
1016  if (runtime->IsCompiler()) {
1017    method->SetEntryPointFromPortableCompiledCode(nullptr);
1018    method->SetEntryPointFromQuickCompiledCode(nullptr);
1019  } else {
1020    method->SetEntryPointFromPortableCompiledCode(GetPortableResolutionTrampoline(class_linker));
1021    method->SetEntryPointFromQuickCompiledCode(GetQuickResolutionTrampoline(class_linker));
1022  }
1023  return method.Get();
1024}
1025
1026mirror::ArtMethod* Runtime::CreateCalleeSaveMethod(CalleeSaveType type) {
1027  Thread* self = Thread::Current();
1028  Runtime* runtime = Runtime::Current();
1029  ClassLinker* class_linker = runtime->GetClassLinker();
1030  StackHandleScope<1> hs(self);
1031  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1032  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1033  // TODO: use a special method for callee saves
1034  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1035  method->SetEntryPointFromPortableCompiledCode(nullptr);
1036  method->SetEntryPointFromQuickCompiledCode(nullptr);
1037  DCHECK_NE(instruction_set_, kNone);
1038  return method.Get();
1039}
1040
1041void Runtime::DisallowNewSystemWeaks() {
1042  monitor_list_->DisallowNewMonitors();
1043  intern_table_->DisallowNewInterns();
1044  java_vm_->DisallowNewWeakGlobals();
1045}
1046
1047void Runtime::AllowNewSystemWeaks() {
1048  monitor_list_->AllowNewMonitors();
1049  intern_table_->AllowNewInterns();
1050  java_vm_->AllowNewWeakGlobals();
1051}
1052
1053void Runtime::SetInstructionSet(InstructionSet instruction_set) {
1054  instruction_set_ = instruction_set;
1055  if ((instruction_set_ == kThumb2) || (instruction_set_ == kArm)) {
1056    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1057      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1058      callee_save_method_frame_infos_[i] = arm::ArmCalleeSaveMethodFrameInfo(type);
1059    }
1060  } else if (instruction_set_ == kMips) {
1061    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1062      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1063      callee_save_method_frame_infos_[i] = mips::MipsCalleeSaveMethodFrameInfo(type);
1064    }
1065  } else if (instruction_set_ == kX86) {
1066    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1067      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1068      callee_save_method_frame_infos_[i] = x86::X86CalleeSaveMethodFrameInfo(type);
1069    }
1070  } else if (instruction_set_ == kX86_64) {
1071    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1072      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1073      callee_save_method_frame_infos_[i] = x86_64::X86_64CalleeSaveMethodFrameInfo(type);
1074    }
1075  } else if (instruction_set_ == kArm64) {
1076    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1077      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1078      callee_save_method_frame_infos_[i] = arm64::Arm64CalleeSaveMethodFrameInfo(type);
1079    }
1080  } else {
1081    UNIMPLEMENTED(FATAL) << instruction_set_;
1082  }
1083}
1084
1085void Runtime::SetCalleeSaveMethod(mirror::ArtMethod* method, CalleeSaveType type) {
1086  DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastCalleeSaveType));
1087  callee_save_methods_[type] = method;
1088}
1089
1090const std::vector<const DexFile*>& Runtime::GetCompileTimeClassPath(jobject class_loader) {
1091  if (class_loader == NULL) {
1092    return GetClassLinker()->GetBootClassPath();
1093  }
1094  CHECK(UseCompileTimeClassPath());
1095  CompileTimeClassPaths::const_iterator it = compile_time_class_paths_.find(class_loader);
1096  CHECK(it != compile_time_class_paths_.end());
1097  return it->second;
1098}
1099
1100void Runtime::SetCompileTimeClassPath(jobject class_loader,
1101                                      std::vector<const DexFile*>& class_path) {
1102  CHECK(!IsStarted());
1103  use_compile_time_class_path_ = true;
1104  compile_time_class_paths_.Put(class_loader, class_path);
1105}
1106
1107void Runtime::AddMethodVerifier(verifier::MethodVerifier* verifier) {
1108  DCHECK(verifier != nullptr);
1109  MutexLock mu(Thread::Current(), method_verifier_lock_);
1110  method_verifiers_.insert(verifier);
1111}
1112
1113void Runtime::RemoveMethodVerifier(verifier::MethodVerifier* verifier) {
1114  DCHECK(verifier != nullptr);
1115  MutexLock mu(Thread::Current(), method_verifier_lock_);
1116  auto it = method_verifiers_.find(verifier);
1117  CHECK(it != method_verifiers_.end());
1118  method_verifiers_.erase(it);
1119}
1120
1121void Runtime::StartProfiler(const char* profile_output_filename) {
1122  profile_output_filename_ = profile_output_filename;
1123  profiler_started_ =
1124    BackgroundMethodSamplingProfiler::Start(profile_output_filename_, profiler_options_);
1125}
1126
1127// Transaction support.
1128void Runtime::EnterTransactionMode(Transaction* transaction) {
1129  DCHECK(IsCompiler());
1130  DCHECK(transaction != nullptr);
1131  DCHECK(!IsActiveTransaction());
1132  preinitialization_transaction_ = transaction;
1133}
1134
1135void Runtime::ExitTransactionMode() {
1136  DCHECK(IsCompiler());
1137  DCHECK(IsActiveTransaction());
1138  preinitialization_transaction_ = nullptr;
1139}
1140
1141void Runtime::RecordWriteField32(mirror::Object* obj, MemberOffset field_offset,
1142                                 uint32_t value, bool is_volatile) const {
1143  DCHECK(IsCompiler());
1144  DCHECK(IsActiveTransaction());
1145  preinitialization_transaction_->RecordWriteField32(obj, field_offset, value, is_volatile);
1146}
1147
1148void Runtime::RecordWriteField64(mirror::Object* obj, MemberOffset field_offset,
1149                                 uint64_t value, bool is_volatile) const {
1150  DCHECK(IsCompiler());
1151  DCHECK(IsActiveTransaction());
1152  preinitialization_transaction_->RecordWriteField64(obj, field_offset, value, is_volatile);
1153}
1154
1155void Runtime::RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset,
1156                                        mirror::Object* value, bool is_volatile) const {
1157  DCHECK(IsCompiler());
1158  DCHECK(IsActiveTransaction());
1159  preinitialization_transaction_->RecordWriteFieldReference(obj, field_offset, value, is_volatile);
1160}
1161
1162void Runtime::RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const {
1163  DCHECK(IsCompiler());
1164  DCHECK(IsActiveTransaction());
1165  preinitialization_transaction_->RecordWriteArray(array, index, value);
1166}
1167
1168void Runtime::RecordStrongStringInsertion(mirror::String* s, uint32_t hash_code) const {
1169  DCHECK(IsCompiler());
1170  DCHECK(IsActiveTransaction());
1171  preinitialization_transaction_->RecordStrongStringInsertion(s, hash_code);
1172}
1173
1174void Runtime::RecordWeakStringInsertion(mirror::String* s, uint32_t hash_code) const {
1175  DCHECK(IsCompiler());
1176  DCHECK(IsActiveTransaction());
1177  preinitialization_transaction_->RecordWeakStringInsertion(s, hash_code);
1178}
1179
1180void Runtime::RecordStrongStringRemoval(mirror::String* s, uint32_t hash_code) const {
1181  DCHECK(IsCompiler());
1182  DCHECK(IsActiveTransaction());
1183  preinitialization_transaction_->RecordStrongStringRemoval(s, hash_code);
1184}
1185
1186void Runtime::RecordWeakStringRemoval(mirror::String* s, uint32_t hash_code) const {
1187  DCHECK(IsCompiler());
1188  DCHECK(IsActiveTransaction());
1189  preinitialization_transaction_->RecordWeakStringRemoval(s, hash_code);
1190}
1191
1192void Runtime::SetFaultMessage(const std::string& message) {
1193  MutexLock mu(Thread::Current(), fault_message_lock_);
1194  fault_message_ = message;
1195}
1196
1197void Runtime::AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* argv)
1198    const {
1199  if (GetInstrumentation()->InterpretOnly()) {
1200    argv->push_back("--compiler-filter=interpret-only");
1201  }
1202
1203  argv->push_back("--runtime-arg");
1204  std::string checkstr = "-implicit-checks";
1205
1206  int nchecks = 0;
1207  char checksep = ':';
1208
1209  if (!ExplicitNullChecks()) {
1210    checkstr += checksep;
1211    checksep = ',';
1212    checkstr += "null";
1213    ++nchecks;
1214  }
1215  if (!ExplicitSuspendChecks()) {
1216    checkstr += checksep;
1217    checksep = ',';
1218    checkstr += "suspend";
1219    ++nchecks;
1220  }
1221
1222  if (!ExplicitStackOverflowChecks()) {
1223    checkstr += checksep;
1224    checksep = ',';
1225    checkstr += "stack";
1226    ++nchecks;
1227  }
1228
1229  if (nchecks == 0) {
1230    checkstr += ":none";
1231  }
1232  argv->push_back(checkstr);
1233
1234  // Make the dex2oat instruction set match that of the launching runtime. If we have multiple
1235  // architecture support, dex2oat may be compiled as a different instruction-set than that
1236  // currently being executed.
1237  std::string instruction_set("--instruction-set=");
1238  instruction_set += GetInstructionSetString(kRuntimeISA);
1239  argv->push_back(instruction_set);
1240
1241  std::string features("--instruction-set-features=");
1242  features += GetDefaultInstructionSetFeatures();
1243  argv->push_back(features);
1244}
1245
1246void Runtime::UpdateProfilerState(int state) {
1247  VLOG(profiler) << "Profiler state updated to " << state;
1248}
1249}  // namespace art
1250