runtime.cc revision 5369c40f75fdcb1be7a7c06db212ce965c83a164 
1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "runtime.h"
18
19// sys/mount.h has to come before linux/fs.h due to redefinition of MS_RDONLY, MS_BIND, etc
20#include <sys/mount.h>
21#ifdef __linux__
22#include <linux/fs.h>
23#endif
24
25#include <signal.h>
26#include <sys/syscall.h>
27#include <valgrind.h>
28
29#include <cstdio>
30#include <cstdlib>
31#include <limits>
32#include <memory>
33#include <vector>
34#include <fcntl.h>
35
36#include "arch/arm/quick_method_frame_info_arm.h"
37#include "arch/arm/registers_arm.h"
38#include "arch/arm64/quick_method_frame_info_arm64.h"
39#include "arch/arm64/registers_arm64.h"
40#include "arch/mips/quick_method_frame_info_mips.h"
41#include "arch/mips/registers_mips.h"
42#include "arch/x86/quick_method_frame_info_x86.h"
43#include "arch/x86/registers_x86.h"
44#include "arch/x86_64/quick_method_frame_info_x86_64.h"
45#include "arch/x86_64/registers_x86_64.h"
46#include "atomic.h"
47#include "class_linker.h"
48#include "debugger.h"
49#include "fault_handler.h"
50#include "gc/accounting/card_table-inl.h"
51#include "gc/heap.h"
52#include "gc/space/image_space.h"
53#include "gc/space/space.h"
54#include "image.h"
55#include "instrumentation.h"
56#include "intern_table.h"
57#include "jni_internal.h"
58#include "mirror/art_field-inl.h"
59#include "mirror/art_method-inl.h"
60#include "mirror/array.h"
61#include "mirror/class-inl.h"
62#include "mirror/class_loader.h"
63#include "mirror/stack_trace_element.h"
64#include "mirror/throwable.h"
65#include "monitor.h"
66#include "native_bridge_art_interface.h"
67#include "parsed_options.h"
68#include "oat_file.h"
69#include "quick/quick_method_frame_info.h"
70#include "reflection.h"
71#include "ScopedLocalRef.h"
72#include "scoped_thread_state_change.h"
73#include "signal_catcher.h"
74#include "signal_set.h"
75#include "handle_scope-inl.h"
76#include "thread.h"
77#include "thread_list.h"
78#include "trace.h"
79#include "transaction.h"
80#include "profiler.h"
81#include "verifier/method_verifier.h"
82#include "well_known_classes.h"
83
84#include "JniConstants.h"  // Last to avoid LOG redefinition in ics-mr1-plus-art.
85
86#ifdef HAVE_ANDROID_OS
87#include "cutils/properties.h"
88#endif
89
90namespace art {
91
92static constexpr bool kEnableJavaStackTraceHandler = true;
93const char* Runtime::kDefaultInstructionSetFeatures =
94    STRINGIFY(ART_DEFAULT_INSTRUCTION_SET_FEATURES);
95Runtime* Runtime::instance_ = NULL;
96
97Runtime::Runtime()
98    : instruction_set_(kNone),
99      compiler_callbacks_(nullptr),
100      is_zygote_(false),
101      must_relocate_(false),
102      is_concurrent_gc_enabled_(true),
103      is_explicit_gc_disabled_(false),
104      dex2oat_enabled_(true),
105      image_dex2oat_enabled_(true),
106      default_stack_size_(0),
107      heap_(nullptr),
108      max_spins_before_thin_lock_inflation_(Monitor::kDefaultMaxSpinsBeforeThinLockInflation),
109      monitor_list_(nullptr),
110      monitor_pool_(nullptr),
111      thread_list_(nullptr),
112      intern_table_(nullptr),
113      class_linker_(nullptr),
114      signal_catcher_(nullptr),
115      java_vm_(nullptr),
116      fault_message_lock_("Fault message lock"),
117      fault_message_(""),
118      method_verifier_lock_("Method verifiers lock"),
119      threads_being_born_(0),
120      shutdown_cond_(new ConditionVariable("Runtime shutdown", *Locks::runtime_shutdown_lock_)),
121      shutting_down_(false),
122      shutting_down_started_(false),
123      started_(false),
124      finished_starting_(false),
125      vfprintf_(nullptr),
126      exit_(nullptr),
127      abort_(nullptr),
128      stats_enabled_(false),
129      running_on_valgrind_(RUNNING_ON_VALGRIND > 0),
130      profiler_started_(false),
131      method_trace_(false),
132      method_trace_file_size_(0),
133      instrumentation_(),
134      use_compile_time_class_path_(false),
135      main_thread_group_(nullptr),
136      system_thread_group_(nullptr),
137      system_class_loader_(nullptr),
138      dump_gc_performance_on_shutdown_(false),
139      preinitialization_transaction_(nullptr),
140      null_pointer_handler_(nullptr),
141      suspend_handler_(nullptr),
142      stack_overflow_handler_(nullptr),
143      verify_(false),
144      target_sdk_version_(0),
145      implicit_null_checks_(false),
146      implicit_so_checks_(false),
147      implicit_suspend_checks_(false),
148      native_bridge_art_callbacks_({GetMethodShorty, GetNativeMethodCount, GetNativeMethods}) {
149}
150
151Runtime::~Runtime() {
152  if (dump_gc_performance_on_shutdown_) {
153    // This can't be called from the Heap destructor below because it
154    // could call RosAlloc::InspectAll() which needs the thread_list
155    // to be still alive.
156    heap_->DumpGcPerformanceInfo(LOG(INFO));
157  }
158
159  Thread* self = Thread::Current();
160  {
161    MutexLock mu(self, *Locks::runtime_shutdown_lock_);
162    shutting_down_started_ = true;
163    while (threads_being_born_ > 0) {
164      shutdown_cond_->Wait(self);
165    }
166    shutting_down_ = true;
167  }
168  // Shut down background profiler before the runtime exits.
169  if (profiler_started_) {
170    BackgroundMethodSamplingProfiler::Shutdown();
171  }
172
173  // Shutdown the fault manager if it was initialized.
174  fault_manager.Shutdown();
175
176  Trace::Shutdown();
177
178  // Make sure to let the GC complete if it is running.
179  heap_->WaitForGcToComplete(gc::kGcCauseBackground, self);
180  heap_->DeleteThreadPool();
181
182  // Make sure our internal threads are dead before we start tearing down things they're using.
183  Dbg::StopJdwp();
184  delete signal_catcher_;
185
186  // Make sure all other non-daemon threads have terminated, and all daemon threads are suspended.
187  delete thread_list_;
188  delete monitor_list_;
189  delete monitor_pool_;
190  delete class_linker_;
191  delete heap_;
192  delete intern_table_;
193  delete java_vm_;
194  Thread::Shutdown();
195  QuasiAtomic::Shutdown();
196  verifier::MethodVerifier::Shutdown();
197  // TODO: acquire a static mutex on Runtime to avoid racing.
198  CHECK(instance_ == nullptr || instance_ == this);
199  instance_ = nullptr;
200
201  delete null_pointer_handler_;
202  delete suspend_handler_;
203  delete stack_overflow_handler_;
204}
205
206struct AbortState {
207  void Dump(std::ostream& os) NO_THREAD_SAFETY_ANALYSIS {
208    if (gAborting > 1) {
209      os << "Runtime aborting --- recursively, so no thread-specific detail!\n";
210      return;
211    }
212    gAborting++;
213    os << "Runtime aborting...\n";
214    if (Runtime::Current() == NULL) {
215      os << "(Runtime does not yet exist!)\n";
216      return;
217    }
218    Thread* self = Thread::Current();
219    if (self == nullptr) {
220      os << "(Aborting thread was not attached to runtime!)\n";
221      DumpKernelStack(os, GetTid(), "  kernel: ", false);
222      DumpNativeStack(os, GetTid(), "  native: ", nullptr);
223    } else {
224      os << "Aborting thread:\n";
225      if (Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)) {
226        DumpThread(os, self);
227      } else {
228        if (Locks::mutator_lock_->SharedTryLock(self)) {
229          DumpThread(os, self);
230          Locks::mutator_lock_->SharedUnlock(self);
231        }
232      }
233    }
234    DumpAllThreads(os, self);
235  }
236
237  void DumpThread(std::ostream& os, Thread* self) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
238    self->Dump(os);
239    if (self->IsExceptionPending()) {
240      ThrowLocation throw_location;
241      mirror::Throwable* exception = self->GetException(&throw_location);
242      os << "Pending exception " << PrettyTypeOf(exception)
243          << " thrown by '" << throw_location.Dump() << "'\n"
244          << exception->Dump();
245    }
246  }
247
248  void DumpAllThreads(std::ostream& os, Thread* self) NO_THREAD_SAFETY_ANALYSIS {
249    Runtime* runtime = Runtime::Current();
250    if (runtime != nullptr) {
251      ThreadList* thread_list = runtime->GetThreadList();
252      if (thread_list != nullptr) {
253        bool tll_already_held = Locks::thread_list_lock_->IsExclusiveHeld(self);
254        bool ml_already_held = Locks::mutator_lock_->IsSharedHeld(self);
255        if (!tll_already_held || !ml_already_held) {
256          os << "Dumping all threads without appropriate locks held:"
257              << (!tll_already_held ? " thread list lock" : "")
258              << (!ml_already_held ? " mutator lock" : "")
259              << "\n";
260        }
261        os << "All threads:\n";
262        thread_list->DumpLocked(os);
263      }
264    }
265  }
266};
267
268void Runtime::Abort() {
269  gAborting++;  // set before taking any locks
270
271  // Ensure that we don't have multiple threads trying to abort at once,
272  // which would result in significantly worse diagnostics.
273  MutexLock mu(Thread::Current(), *Locks::abort_lock_);
274
275  // Get any pending output out of the way.
276  fflush(NULL);
277
278  // Many people have difficulty distinguish aborts from crashes,
279  // so be explicit.
280  AbortState state;
281  LOG(INTERNAL_FATAL) << Dumpable<AbortState>(state);
282
283  // Call the abort hook if we have one.
284  if (Runtime::Current() != NULL && Runtime::Current()->abort_ != NULL) {
285    LOG(INTERNAL_FATAL) << "Calling abort hook...";
286    Runtime::Current()->abort_();
287    // notreached
288    LOG(INTERNAL_FATAL) << "Unexpectedly returned from abort hook!";
289  }
290
291#if defined(__GLIBC__)
292  // TODO: we ought to be able to use pthread_kill(3) here (or abort(3),
293  // which POSIX defines in terms of raise(3), which POSIX defines in terms
294  // of pthread_kill(3)). On Linux, though, libcorkscrew can't unwind through
295  // libpthread, which means the stacks we dump would be useless. Calling
296  // tgkill(2) directly avoids that.
297  syscall(__NR_tgkill, getpid(), GetTid(), SIGABRT);
298  // TODO: LLVM installs it's own SIGABRT handler so exit to be safe... Can we disable that in LLVM?
299  // If not, we could use sigaction(3) before calling tgkill(2) and lose this call to exit(3).
300  exit(1);
301#else
302  abort();
303#endif
304  // notreached
305}
306
307void Runtime::PreZygoteFork() {
308  heap_->PreZygoteFork();
309}
310
311void Runtime::CallExitHook(jint status) {
312  if (exit_ != NULL) {
313    ScopedThreadStateChange tsc(Thread::Current(), kNative);
314    exit_(status);
315    LOG(WARNING) << "Exit hook returned instead of exiting!";
316  }
317}
318
319void Runtime::SweepSystemWeaks(IsMarkedCallback* visitor, void* arg) {
320  GetInternTable()->SweepInternTableWeaks(visitor, arg);
321  GetMonitorList()->SweepMonitorList(visitor, arg);
322  GetJavaVM()->SweepJniWeakGlobals(visitor, arg);
323}
324
325bool Runtime::Create(const RuntimeOptions& options, bool ignore_unrecognized) {
326  // TODO: acquire a static mutex on Runtime to avoid racing.
327  if (Runtime::instance_ != NULL) {
328    return false;
329  }
330  InitLogging(NULL);  // Calls Locks::Init() as a side effect.
331  instance_ = new Runtime;
332  if (!instance_->Init(options, ignore_unrecognized)) {
333    delete instance_;
334    instance_ = NULL;
335    return false;
336  }
337  return true;
338}
339
340jobject CreateSystemClassLoader() {
341  if (Runtime::Current()->UseCompileTimeClassPath()) {
342    return NULL;
343  }
344
345  ScopedObjectAccess soa(Thread::Current());
346  ClassLinker* cl = Runtime::Current()->GetClassLinker();
347
348  StackHandleScope<3> hs(soa.Self());
349  Handle<mirror::Class> class_loader_class(
350      hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_ClassLoader)));
351  CHECK(cl->EnsureInitialized(class_loader_class, true, true));
352
353  mirror::ArtMethod* getSystemClassLoader =
354      class_loader_class->FindDirectMethod("getSystemClassLoader", "()Ljava/lang/ClassLoader;");
355  CHECK(getSystemClassLoader != NULL);
356
357  JValue result = InvokeWithJValues(soa, nullptr, soa.EncodeMethod(getSystemClassLoader), nullptr);
358  Handle<mirror::ClassLoader> class_loader(
359      hs.NewHandle(down_cast<mirror::ClassLoader*>(result.GetL())));
360  CHECK(class_loader.Get() != nullptr);
361  JNIEnv* env = soa.Self()->GetJniEnv();
362  ScopedLocalRef<jobject> system_class_loader(env,
363                                              soa.AddLocalReference<jobject>(class_loader.Get()));
364  CHECK(system_class_loader.get() != nullptr);
365
366  soa.Self()->SetClassLoaderOverride(class_loader.Get());
367
368  Handle<mirror::Class> thread_class(
369      hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_Thread)));
370  CHECK(cl->EnsureInitialized(thread_class, true, true));
371
372  mirror::ArtField* contextClassLoader =
373      thread_class->FindDeclaredInstanceField("contextClassLoader", "Ljava/lang/ClassLoader;");
374  CHECK(contextClassLoader != NULL);
375
376  // We can't run in a transaction yet.
377  contextClassLoader->SetObject<false>(soa.Self()->GetPeer(), class_loader.Get());
378
379  return env->NewGlobalRef(system_class_loader.get());
380}
381
382std::string Runtime::GetPatchoatExecutable() const {
383  if (!patchoat_executable_.empty()) {
384    return patchoat_executable_;
385  }
386  std::string patchoat_executable_(GetAndroidRoot());
387  patchoat_executable_ += (kIsDebugBuild ? "/bin/patchoatd" : "/bin/patchoat");
388  return patchoat_executable_;
389}
390
391std::string Runtime::GetCompilerExecutable() const {
392  if (!compiler_executable_.empty()) {
393    return compiler_executable_;
394  }
395  std::string compiler_executable(GetAndroidRoot());
396  compiler_executable += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat");
397  return compiler_executable;
398}
399
400bool Runtime::Start() {
401  VLOG(startup) << "Runtime::Start entering";
402
403  // Restore main thread state to kNative as expected by native code.
404  Thread* self = Thread::Current();
405
406  self->TransitionFromRunnableToSuspended(kNative);
407
408  started_ = true;
409
410  if (!IsImageDex2OatEnabled() || !Runtime::Current()->GetHeap()->HasImageSpace()) {
411    ScopedObjectAccess soa(Thread::Current());
412    StackHandleScope<1> hs(soa.Self());
413    auto klass(hs.NewHandle<mirror::Class>(mirror::Class::GetJavaLangClass()));
414    class_linker_->EnsureInitialized(klass, true, true);
415  }
416
417  // InitNativeMethods needs to be after started_ so that the classes
418  // it touches will have methods linked to the oat file if necessary.
419  InitNativeMethods();
420
421  // Initialize well known thread group values that may be accessed threads while attaching.
422  InitThreadGroups(self);
423
424  Thread::FinishStartup();
425
426  if (is_zygote_) {
427    if (!InitZygote()) {
428      return false;
429    }
430  } else {
431    DidForkFromZygote();
432  }
433
434  StartDaemonThreads();
435
436  system_class_loader_ = CreateSystemClassLoader();
437
438  {
439    ScopedObjectAccess soa(self);
440    self->GetJniEnv()->locals.AssertEmpty();
441  }
442
443  VLOG(startup) << "Runtime::Start exiting";
444  finished_starting_ = true;
445
446  if (profiler_options_.IsEnabled() && !profile_output_filename_.empty()) {
447    // User has asked for a profile using -Xenable-profiler.
448    // Create the profile file if it doesn't exist.
449    int fd = open(profile_output_filename_.c_str(), O_RDWR|O_CREAT|O_EXCL, 0660);
450    if (fd >= 0) {
451      close(fd);
452    } else if (errno != EEXIST) {
453      LOG(INFO) << "Failed to access the profile file. Profiler disabled.";
454      return true;
455    }
456    StartProfiler(profile_output_filename_.c_str());
457  }
458
459  return true;
460}
461
462void Runtime::EndThreadBirth() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) {
463  DCHECK_GT(threads_being_born_, 0U);
464  threads_being_born_--;
465  if (shutting_down_started_ && threads_being_born_ == 0) {
466    shutdown_cond_->Broadcast(Thread::Current());
467  }
468}
469
470// Do zygote-mode-only initialization.
471bool Runtime::InitZygote() {
472#ifdef __linux__
473  // zygote goes into its own process group
474  setpgid(0, 0);
475
476  // See storage config details at http://source.android.com/tech/storage/
477  // Create private mount namespace shared by all children
478  if (unshare(CLONE_NEWNS) == -1) {
479    PLOG(WARNING) << "Failed to unshare()";
480    return false;
481  }
482
483  // Mark rootfs as being a slave so that changes from default
484  // namespace only flow into our children.
485  if (mount("rootfs", "/", NULL, (MS_SLAVE | MS_REC), NULL) == -1) {
486    PLOG(WARNING) << "Failed to mount() rootfs as MS_SLAVE";
487    return false;
488  }
489
490  // Create a staging tmpfs that is shared by our children; they will
491  // bind mount storage into their respective private namespaces, which
492  // are isolated from each other.
493  const char* target_base = getenv("EMULATED_STORAGE_TARGET");
494  if (target_base != NULL) {
495    if (mount("tmpfs", target_base, "tmpfs", MS_NOSUID | MS_NODEV,
496              "uid=0,gid=1028,mode=0751") == -1) {
497      LOG(WARNING) << "Failed to mount tmpfs to " << target_base;
498      return false;
499    }
500  }
501
502  return true;
503#else
504  UNIMPLEMENTED(FATAL);
505  return false;
506#endif
507}
508
509void Runtime::DidForkFromZygote() {
510  is_zygote_ = false;
511
512  // Create the thread pool.
513  heap_->CreateThreadPool();
514
515  StartSignalCatcher();
516
517  // Start the JDWP thread. If the command-line debugger flags specified "suspend=y",
518  // this will pause the runtime, so we probably want this to come last.
519  Dbg::StartJdwp();
520}
521
522void Runtime::StartSignalCatcher() {
523  if (!is_zygote_) {
524    signal_catcher_ = new SignalCatcher(stack_trace_file_);
525  }
526}
527
528bool Runtime::IsShuttingDown(Thread* self) {
529  MutexLock mu(self, *Locks::runtime_shutdown_lock_);
530  return IsShuttingDownLocked();
531}
532
533void Runtime::StartDaemonThreads() {
534  VLOG(startup) << "Runtime::StartDaemonThreads entering";
535
536  Thread* self = Thread::Current();
537
538  // Must be in the kNative state for calling native methods.
539  CHECK_EQ(self->GetState(), kNative);
540
541  JNIEnv* env = self->GetJniEnv();
542  env->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons,
543                            WellKnownClasses::java_lang_Daemons_start);
544  if (env->ExceptionCheck()) {
545    env->ExceptionDescribe();
546    LOG(FATAL) << "Error starting java.lang.Daemons";
547  }
548
549  VLOG(startup) << "Runtime::StartDaemonThreads exiting";
550}
551
552static size_t OpenDexFiles(const std::vector<std::string>& dex_filenames,
553                           std::vector<const DexFile*>& dex_files) {
554  size_t failure_count = 0;
555  for (size_t i = 0; i < dex_filenames.size(); i++) {
556    const char* dex_filename = dex_filenames[i].c_str();
557    std::string error_msg;
558    if (!OS::FileExists(dex_filename)) {
559      LOG(WARNING) << "Skipping non-existent dex file '" << dex_filename << "'";
560      continue;
561    }
562    if (!DexFile::Open(dex_filename, dex_filename, &error_msg, &dex_files)) {
563      LOG(WARNING) << "Failed to open .dex from file '" << dex_filename << "': " << error_msg;
564      ++failure_count;
565    }
566  }
567  return failure_count;
568}
569
570bool Runtime::Init(const RuntimeOptions& raw_options, bool ignore_unrecognized) {
571  CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize);
572
573  std::unique_ptr<ParsedOptions> options(ParsedOptions::Create(raw_options, ignore_unrecognized));
574  if (options.get() == NULL) {
575    LOG(ERROR) << "Failed to parse options";
576    return false;
577  }
578  VLOG(startup) << "Runtime::Init -verbose:startup enabled";
579
580  QuasiAtomic::Startup();
581
582  Monitor::Init(options->lock_profiling_threshold_, options->hook_is_sensitive_thread_);
583
584  boot_class_path_string_ = options->boot_class_path_string_;
585  class_path_string_ = options->class_path_string_;
586  properties_ = options->properties_;
587
588  compiler_callbacks_ = options->compiler_callbacks_;
589  patchoat_executable_ = options->patchoat_executable_;
590  must_relocate_ = options->must_relocate_;
591  is_zygote_ = options->is_zygote_;
592  is_explicit_gc_disabled_ = options->is_explicit_gc_disabled_;
593  dex2oat_enabled_ = options->dex2oat_enabled_;
594  image_dex2oat_enabled_ = options->image_dex2oat_enabled_;
595
596  vfprintf_ = options->hook_vfprintf_;
597  exit_ = options->hook_exit_;
598  abort_ = options->hook_abort_;
599
600  default_stack_size_ = options->stack_size_;
601  stack_trace_file_ = options->stack_trace_file_;
602
603  compiler_executable_ = options->compiler_executable_;
604  compiler_options_ = options->compiler_options_;
605  image_compiler_options_ = options->image_compiler_options_;
606
607  max_spins_before_thin_lock_inflation_ = options->max_spins_before_thin_lock_inflation_;
608
609  monitor_list_ = new MonitorList;
610  monitor_pool_ = MonitorPool::Create();
611  thread_list_ = new ThreadList;
612  intern_table_ = new InternTable;
613
614  verify_ = options->verify_;
615
616  if (options->interpreter_only_) {
617    GetInstrumentation()->ForceInterpretOnly();
618  }
619
620  heap_ = new gc::Heap(options->heap_initial_size_,
621                       options->heap_growth_limit_,
622                       options->heap_min_free_,
623                       options->heap_max_free_,
624                       options->heap_target_utilization_,
625                       options->foreground_heap_growth_multiplier_,
626                       options->heap_maximum_size_,
627                       options->heap_non_moving_space_capacity_,
628                       options->image_,
629                       options->image_isa_,
630                       options->collector_type_,
631                       options->background_collector_type_,
632                       options->parallel_gc_threads_,
633                       options->conc_gc_threads_,
634                       options->low_memory_mode_,
635                       options->long_pause_log_threshold_,
636                       options->long_gc_log_threshold_,
637                       options->ignore_max_footprint_,
638                       options->use_tlab_,
639                       options->verify_pre_gc_heap_,
640                       options->verify_pre_sweeping_heap_,
641                       options->verify_post_gc_heap_,
642                       options->verify_pre_gc_rosalloc_,
643                       options->verify_pre_sweeping_rosalloc_,
644                       options->verify_post_gc_rosalloc_,
645                       options->use_homogeneous_space_compaction_for_oom_,
646                       options->min_interval_homogeneous_space_compaction_by_oom_);
647
648  dump_gc_performance_on_shutdown_ = options->dump_gc_performance_on_shutdown_;
649
650  BlockSignals();
651  InitPlatformSignalHandlers();
652
653  // Change the implicit checks flags based on runtime architecture.
654  switch (kRuntimeISA) {
655    case kArm:
656    case kThumb2:
657    case kX86:
658    case kArm64:
659    case kX86_64:
660      implicit_null_checks_ = true;
661      implicit_so_checks_ = true;
662      break;
663    default:
664      // Keep the defaults.
665      break;
666  }
667
668  if (implicit_null_checks_ || implicit_so_checks_ || implicit_suspend_checks_) {
669    fault_manager.Init();
670
671    // These need to be in a specific order.  The null point check handler must be
672    // after the suspend check and stack overflow check handlers.
673    if (implicit_suspend_checks_) {
674      suspend_handler_ = new SuspensionHandler(&fault_manager);
675    }
676
677    if (implicit_so_checks_) {
678      stack_overflow_handler_ = new StackOverflowHandler(&fault_manager);
679    }
680
681    if (implicit_null_checks_) {
682      null_pointer_handler_ = new NullPointerHandler(&fault_manager);
683    }
684
685    if (kEnableJavaStackTraceHandler) {
686      new JavaStackTraceHandler(&fault_manager);
687    }
688  }
689
690  java_vm_ = new JavaVMExt(this, options.get());
691
692  Thread::Startup();
693
694  // ClassLinker needs an attached thread, but we can't fully attach a thread without creating
695  // objects. We can't supply a thread group yet; it will be fixed later. Since we are the main
696  // thread, we do not get a java peer.
697  Thread* self = Thread::Attach("main", false, NULL, false);
698  CHECK_EQ(self->GetThreadId(), ThreadList::kMainThreadId);
699  CHECK(self != NULL);
700
701  // Set us to runnable so tools using a runtime can allocate and GC by default
702  self->TransitionFromSuspendedToRunnable();
703
704  // Now we're attached, we can take the heap locks and validate the heap.
705  GetHeap()->EnableObjectValidation();
706
707  CHECK_GE(GetHeap()->GetContinuousSpaces().size(), 1U);
708  class_linker_ = new ClassLinker(intern_table_);
709  if (GetHeap()->HasImageSpace()) {
710    class_linker_->InitFromImage();
711    if (kIsDebugBuild) {
712      GetHeap()->GetImageSpace()->VerifyImageAllocations();
713    }
714  } else if (!IsCompiler() || !image_dex2oat_enabled_) {
715    std::vector<std::string> dex_filenames;
716    Split(boot_class_path_string_, ':', dex_filenames);
717    std::vector<const DexFile*> boot_class_path;
718    OpenDexFiles(dex_filenames, boot_class_path);
719    class_linker_->InitWithoutImage(boot_class_path);
720    // TODO: Should we move the following to InitWithoutImage?
721    SetInstructionSet(kRuntimeISA);
722    for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
723      Runtime::CalleeSaveType type = Runtime::CalleeSaveType(i);
724      if (!HasCalleeSaveMethod(type)) {
725        SetCalleeSaveMethod(CreateCalleeSaveMethod(type), type);
726      }
727    }
728  } else {
729    CHECK(options->boot_class_path_ != NULL);
730    CHECK_NE(options->boot_class_path_->size(), 0U);
731    class_linker_->InitWithoutImage(*options->boot_class_path_);
732  }
733  CHECK(class_linker_ != NULL);
734  verifier::MethodVerifier::Init();
735
736  method_trace_ = options->method_trace_;
737  method_trace_file_ = options->method_trace_file_;
738  method_trace_file_size_ = options->method_trace_file_size_;
739
740  profile_output_filename_ = options->profile_output_filename_;
741  profiler_options_ = options->profiler_options_;
742
743  // TODO: move this to just be an Trace::Start argument
744  Trace::SetDefaultClockSource(options->profile_clock_source_);
745
746  if (options->method_trace_) {
747    ScopedThreadStateChange tsc(self, kWaitingForMethodTracingStart);
748    Trace::Start(options->method_trace_file_.c_str(), -1, options->method_trace_file_size_, 0,
749                 false, false, 0);
750  }
751
752  // Pre-allocate an OutOfMemoryError for the double-OOME case.
753  self->ThrowNewException(ThrowLocation(), "Ljava/lang/OutOfMemoryError;",
754                          "OutOfMemoryError thrown while trying to throw OutOfMemoryError; "
755                          "no stack available");
756  pre_allocated_OutOfMemoryError_ = GcRoot<mirror::Throwable>(self->GetException(NULL));
757  self->ClearException();
758
759  // Look for a native bridge.
760  native_bridge_library_filename_ = options->native_bridge_library_filename_;
761  android::SetupNativeBridge(native_bridge_library_filename_.c_str(), &native_bridge_art_callbacks_);
762  VLOG(startup) << "Runtime::Setup native bridge library: "
763                << (native_bridge_library_filename_.empty() ?
764                    "(empty)" : native_bridge_library_filename_);
765
766  VLOG(startup) << "Runtime::Init exiting";
767  return true;
768}
769
770void Runtime::InitNativeMethods() {
771  VLOG(startup) << "Runtime::InitNativeMethods entering";
772  Thread* self = Thread::Current();
773  JNIEnv* env = self->GetJniEnv();
774
775  // Must be in the kNative state for calling native methods (JNI_OnLoad code).
776  CHECK_EQ(self->GetState(), kNative);
777
778  // First set up JniConstants, which is used by both the runtime's built-in native
779  // methods and libcore.
780  JniConstants::init(env);
781  WellKnownClasses::Init(env);
782
783  // Then set up the native methods provided by the runtime itself.
784  RegisterRuntimeNativeMethods(env);
785
786  // Then set up libcore, which is just a regular JNI library with a regular JNI_OnLoad.
787  // Most JNI libraries can just use System.loadLibrary, but libcore can't because it's
788  // the library that implements System.loadLibrary!
789  {
790    std::string mapped_name(StringPrintf(OS_SHARED_LIB_FORMAT_STR, "javacore"));
791    std::string reason;
792    self->TransitionFromSuspendedToRunnable();
793    StackHandleScope<1> hs(self);
794    auto class_loader(hs.NewHandle<mirror::ClassLoader>(nullptr));
795    if (!instance_->java_vm_->LoadNativeLibrary(mapped_name, class_loader, &reason)) {
796      LOG(FATAL) << "LoadNativeLibrary failed for \"" << mapped_name << "\": " << reason;
797    }
798    self->TransitionFromRunnableToSuspended(kNative);
799  }
800
801  // Initialize well known classes that may invoke runtime native methods.
802  WellKnownClasses::LateInit(env);
803
804  VLOG(startup) << "Runtime::InitNativeMethods exiting";
805}
806
807void Runtime::InitThreadGroups(Thread* self) {
808  JNIEnvExt* env = self->GetJniEnv();
809  ScopedJniEnvLocalRefState env_state(env);
810  main_thread_group_ =
811      env->NewGlobalRef(env->GetStaticObjectField(
812          WellKnownClasses::java_lang_ThreadGroup,
813          WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup));
814  CHECK(main_thread_group_ != NULL || IsCompiler());
815  system_thread_group_ =
816      env->NewGlobalRef(env->GetStaticObjectField(
817          WellKnownClasses::java_lang_ThreadGroup,
818          WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup));
819  CHECK(system_thread_group_ != NULL || IsCompiler());
820}
821
822jobject Runtime::GetMainThreadGroup() const {
823  CHECK(main_thread_group_ != NULL || IsCompiler());
824  return main_thread_group_;
825}
826
827jobject Runtime::GetSystemThreadGroup() const {
828  CHECK(system_thread_group_ != NULL || IsCompiler());
829  return system_thread_group_;
830}
831
832jobject Runtime::GetSystemClassLoader() const {
833  CHECK(system_class_loader_ != NULL || IsCompiler());
834  return system_class_loader_;
835}
836
837void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) {
838#define REGISTER(FN) extern void FN(JNIEnv*); FN(env)
839  // Register Throwable first so that registration of other native methods can throw exceptions
840  REGISTER(register_java_lang_Throwable);
841  REGISTER(register_dalvik_system_DexFile);
842  REGISTER(register_dalvik_system_VMDebug);
843  REGISTER(register_dalvik_system_VMRuntime);
844  REGISTER(register_dalvik_system_VMStack);
845  REGISTER(register_dalvik_system_ZygoteHooks);
846  REGISTER(register_java_lang_Class);
847  REGISTER(register_java_lang_DexCache);
848  REGISTER(register_java_lang_Object);
849  REGISTER(register_java_lang_Runtime);
850  REGISTER(register_java_lang_String);
851  REGISTER(register_java_lang_System);
852  REGISTER(register_java_lang_Thread);
853  REGISTER(register_java_lang_VMClassLoader);
854  REGISTER(register_java_lang_ref_Reference);
855  REGISTER(register_java_lang_reflect_Array);
856  REGISTER(register_java_lang_reflect_Constructor);
857  REGISTER(register_java_lang_reflect_Field);
858  REGISTER(register_java_lang_reflect_Method);
859  REGISTER(register_java_lang_reflect_Proxy);
860  REGISTER(register_java_util_concurrent_atomic_AtomicLong);
861  REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmServer);
862  REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmVmInternal);
863  REGISTER(register_sun_misc_Unsafe);
864#undef REGISTER
865}
866
867void Runtime::DumpForSigQuit(std::ostream& os) {
868  GetClassLinker()->DumpForSigQuit(os);
869  GetInternTable()->DumpForSigQuit(os);
870  GetJavaVM()->DumpForSigQuit(os);
871  GetHeap()->DumpForSigQuit(os);
872  TrackedAllocators::Dump(os);
873  os << "\n";
874
875  thread_list_->DumpForSigQuit(os);
876  BaseMutex::DumpAll(os);
877}
878
879void Runtime::DumpLockHolders(std::ostream& os) {
880  uint64_t mutator_lock_owner = Locks::mutator_lock_->GetExclusiveOwnerTid();
881  pid_t thread_list_lock_owner = GetThreadList()->GetLockOwner();
882  pid_t classes_lock_owner = GetClassLinker()->GetClassesLockOwner();
883  pid_t dex_lock_owner = GetClassLinker()->GetDexLockOwner();
884  if ((thread_list_lock_owner | classes_lock_owner | dex_lock_owner) != 0) {
885    os << "Mutator lock exclusive owner tid: " << mutator_lock_owner << "\n"
886       << "ThreadList lock owner tid: " << thread_list_lock_owner << "\n"
887       << "ClassLinker classes lock owner tid: " << classes_lock_owner << "\n"
888       << "ClassLinker dex lock owner tid: " << dex_lock_owner << "\n";
889  }
890}
891
892void Runtime::SetStatsEnabled(bool new_state) {
893  if (new_state == true) {
894    GetStats()->Clear(~0);
895    // TODO: wouldn't it make more sense to clear _all_ threads' stats?
896    Thread::Current()->GetStats()->Clear(~0);
897    GetInstrumentation()->InstrumentQuickAllocEntryPoints();
898  } else {
899    GetInstrumentation()->UninstrumentQuickAllocEntryPoints();
900  }
901  stats_enabled_ = new_state;
902}
903
904void Runtime::ResetStats(int kinds) {
905  GetStats()->Clear(kinds & 0xffff);
906  // TODO: wouldn't it make more sense to clear _all_ threads' stats?
907  Thread::Current()->GetStats()->Clear(kinds >> 16);
908}
909
910int32_t Runtime::GetStat(int kind) {
911  RuntimeStats* stats;
912  if (kind < (1<<16)) {
913    stats = GetStats();
914  } else {
915    stats = Thread::Current()->GetStats();
916    kind >>= 16;
917  }
918  switch (kind) {
919  case KIND_ALLOCATED_OBJECTS:
920    return stats->allocated_objects;
921  case KIND_ALLOCATED_BYTES:
922    return stats->allocated_bytes;
923  case KIND_FREED_OBJECTS:
924    return stats->freed_objects;
925  case KIND_FREED_BYTES:
926    return stats->freed_bytes;
927  case KIND_GC_INVOCATIONS:
928    return stats->gc_for_alloc_count;
929  case KIND_CLASS_INIT_COUNT:
930    return stats->class_init_count;
931  case KIND_CLASS_INIT_TIME:
932    // Convert ns to us, reduce to 32 bits.
933    return static_cast<int>(stats->class_init_time_ns / 1000);
934  case KIND_EXT_ALLOCATED_OBJECTS:
935  case KIND_EXT_ALLOCATED_BYTES:
936  case KIND_EXT_FREED_OBJECTS:
937  case KIND_EXT_FREED_BYTES:
938    return 0;  // backward compatibility
939  default:
940    LOG(FATAL) << "Unknown statistic " << kind;
941    return -1;  // unreachable
942  }
943}
944
945void Runtime::BlockSignals() {
946  SignalSet signals;
947  signals.Add(SIGPIPE);
948  // SIGQUIT is used to dump the runtime's state (including stack traces).
949  signals.Add(SIGQUIT);
950  // SIGUSR1 is used to initiate a GC.
951  signals.Add(SIGUSR1);
952  signals.Block();
953}
954
955bool Runtime::AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group,
956                                  bool create_peer) {
957  return Thread::Attach(thread_name, as_daemon, thread_group, create_peer) != NULL;
958}
959
960void Runtime::DetachCurrentThread() {
961  Thread* self = Thread::Current();
962  if (self == NULL) {
963    LOG(FATAL) << "attempting to detach thread that is not attached";
964  }
965  if (self->HasManagedStack()) {
966    LOG(FATAL) << *Thread::Current() << " attempting to detach while still running code";
967  }
968  thread_list_->Unregister(self);
969}
970
971mirror::Throwable* Runtime::GetPreAllocatedOutOfMemoryError() {
972  mirror::Throwable* oome = pre_allocated_OutOfMemoryError_.Read();
973  if (oome == NULL) {
974    LOG(ERROR) << "Failed to return pre-allocated OOME";
975  }
976  return oome;
977}
978
979void Runtime::VisitConstantRoots(RootCallback* callback, void* arg) {
980  // Visit the classes held as static in mirror classes, these can be visited concurrently and only
981  // need to be visited once per GC since they never change.
982  mirror::ArtField::VisitRoots(callback, arg);
983  mirror::ArtMethod::VisitRoots(callback, arg);
984  mirror::Class::VisitRoots(callback, arg);
985  mirror::Reference::VisitRoots(callback, arg);
986  mirror::StackTraceElement::VisitRoots(callback, arg);
987  mirror::String::VisitRoots(callback, arg);
988  mirror::Throwable::VisitRoots(callback, arg);
989  // Visit all the primitive array types classes.
990  mirror::PrimitiveArray<uint8_t>::VisitRoots(callback, arg);   // BooleanArray
991  mirror::PrimitiveArray<int8_t>::VisitRoots(callback, arg);    // ByteArray
992  mirror::PrimitiveArray<uint16_t>::VisitRoots(callback, arg);  // CharArray
993  mirror::PrimitiveArray<double>::VisitRoots(callback, arg);    // DoubleArray
994  mirror::PrimitiveArray<float>::VisitRoots(callback, arg);     // FloatArray
995  mirror::PrimitiveArray<int32_t>::VisitRoots(callback, arg);   // IntArray
996  mirror::PrimitiveArray<int64_t>::VisitRoots(callback, arg);   // LongArray
997  mirror::PrimitiveArray<int16_t>::VisitRoots(callback, arg);   // ShortArray
998}
999
1000void Runtime::VisitConcurrentRoots(RootCallback* callback, void* arg, VisitRootFlags flags) {
1001  intern_table_->VisitRoots(callback, arg, flags);
1002  class_linker_->VisitRoots(callback, arg, flags);
1003  if ((flags & kVisitRootFlagNewRoots) == 0) {
1004    // Guaranteed to have no new roots in the constant roots.
1005    VisitConstantRoots(callback, arg);
1006  }
1007}
1008
1009void Runtime::VisitNonThreadRoots(RootCallback* callback, void* arg) {
1010  java_vm_->VisitRoots(callback, arg);
1011  if (!pre_allocated_OutOfMemoryError_.IsNull()) {
1012    pre_allocated_OutOfMemoryError_.VisitRoot(callback, arg, 0, kRootVMInternal);
1013    DCHECK(!pre_allocated_OutOfMemoryError_.IsNull());
1014  }
1015  resolution_method_.VisitRoot(callback, arg, 0, kRootVMInternal);
1016  DCHECK(!resolution_method_.IsNull());
1017  if (HasImtConflictMethod()) {
1018    imt_conflict_method_.VisitRoot(callback, arg, 0, kRootVMInternal);
1019  }
1020  if (HasDefaultImt()) {
1021    default_imt_.VisitRoot(callback, arg, 0, kRootVMInternal);
1022  }
1023  for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
1024    if (!callee_save_methods_[i].IsNull()) {
1025      callee_save_methods_[i].VisitRoot(callback, arg, 0, kRootVMInternal);
1026    }
1027  }
1028  {
1029    MutexLock mu(Thread::Current(), method_verifier_lock_);
1030    for (verifier::MethodVerifier* verifier : method_verifiers_) {
1031      verifier->VisitRoots(callback, arg);
1032    }
1033  }
1034  if (preinitialization_transaction_ != nullptr) {
1035    preinitialization_transaction_->VisitRoots(callback, arg);
1036  }
1037  instrumentation_.VisitRoots(callback, arg);
1038}
1039
1040void Runtime::VisitNonConcurrentRoots(RootCallback* callback, void* arg) {
1041  thread_list_->VisitRoots(callback, arg);
1042  VisitNonThreadRoots(callback, arg);
1043}
1044
1045void Runtime::VisitRoots(RootCallback* callback, void* arg, VisitRootFlags flags) {
1046  VisitNonConcurrentRoots(callback, arg);
1047  VisitConcurrentRoots(callback, arg, flags);
1048}
1049
1050mirror::ObjectArray<mirror::ArtMethod>* Runtime::CreateDefaultImt(ClassLinker* cl) {
1051  Thread* self = Thread::Current();
1052  StackHandleScope<1> hs(self);
1053  Handle<mirror::ObjectArray<mirror::ArtMethod>> imtable(
1054      hs.NewHandle(cl->AllocArtMethodArray(self, 64)));
1055  mirror::ArtMethod* imt_conflict_method = Runtime::Current()->GetImtConflictMethod();
1056  for (size_t i = 0; i < static_cast<size_t>(imtable->GetLength()); i++) {
1057    imtable->Set<false>(i, imt_conflict_method);
1058  }
1059  return imtable.Get();
1060}
1061
1062mirror::ArtMethod* Runtime::CreateImtConflictMethod() {
1063  Thread* self = Thread::Current();
1064  Runtime* runtime = Runtime::Current();
1065  ClassLinker* class_linker = runtime->GetClassLinker();
1066  StackHandleScope<1> hs(self);
1067  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1068  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1069  // TODO: use a special method for imt conflict method saves.
1070  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1071  // When compiling, the code pointer will get set later when the image is loaded.
1072  if (runtime->IsCompiler()) {
1073    method->SetEntryPointFromPortableCompiledCode(nullptr);
1074    method->SetEntryPointFromQuickCompiledCode(nullptr);
1075  } else {
1076    method->SetEntryPointFromPortableCompiledCode(class_linker->GetPortableImtConflictTrampoline());
1077    method->SetEntryPointFromQuickCompiledCode(class_linker->GetQuickImtConflictTrampoline());
1078  }
1079  return method.Get();
1080}
1081
1082mirror::ArtMethod* Runtime::CreateResolutionMethod() {
1083  Thread* self = Thread::Current();
1084  Runtime* runtime = Runtime::Current();
1085  ClassLinker* class_linker = runtime->GetClassLinker();
1086  StackHandleScope<1> hs(self);
1087  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1088  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1089  // TODO: use a special method for resolution method saves
1090  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1091  // When compiling, the code pointer will get set later when the image is loaded.
1092  if (runtime->IsCompiler()) {
1093    method->SetEntryPointFromPortableCompiledCode(nullptr);
1094    method->SetEntryPointFromQuickCompiledCode(nullptr);
1095  } else {
1096    method->SetEntryPointFromPortableCompiledCode(class_linker->GetPortableResolutionTrampoline());
1097    method->SetEntryPointFromQuickCompiledCode(class_linker->GetQuickResolutionTrampoline());
1098  }
1099  return method.Get();
1100}
1101
1102mirror::ArtMethod* Runtime::CreateCalleeSaveMethod(CalleeSaveType type) {
1103  Thread* self = Thread::Current();
1104  Runtime* runtime = Runtime::Current();
1105  ClassLinker* class_linker = runtime->GetClassLinker();
1106  StackHandleScope<1> hs(self);
1107  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1108  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1109  // TODO: use a special method for callee saves
1110  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1111  method->SetEntryPointFromPortableCompiledCode(nullptr);
1112  method->SetEntryPointFromQuickCompiledCode(nullptr);
1113  DCHECK_NE(instruction_set_, kNone);
1114  return method.Get();
1115}
1116
1117void Runtime::DisallowNewSystemWeaks() {
1118  monitor_list_->DisallowNewMonitors();
1119  intern_table_->DisallowNewInterns();
1120  java_vm_->DisallowNewWeakGlobals();
1121}
1122
1123void Runtime::AllowNewSystemWeaks() {
1124  monitor_list_->AllowNewMonitors();
1125  intern_table_->AllowNewInterns();
1126  java_vm_->AllowNewWeakGlobals();
1127}
1128
1129void Runtime::SetInstructionSet(InstructionSet instruction_set) {
1130  instruction_set_ = instruction_set;
1131  if ((instruction_set_ == kThumb2) || (instruction_set_ == kArm)) {
1132    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1133      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1134      callee_save_method_frame_infos_[i] = arm::ArmCalleeSaveMethodFrameInfo(type);
1135    }
1136  } else if (instruction_set_ == kMips) {
1137    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1138      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1139      callee_save_method_frame_infos_[i] = mips::MipsCalleeSaveMethodFrameInfo(type);
1140    }
1141  } else if (instruction_set_ == kX86) {
1142    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1143      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1144      callee_save_method_frame_infos_[i] = x86::X86CalleeSaveMethodFrameInfo(type);
1145    }
1146  } else if (instruction_set_ == kX86_64) {
1147    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1148      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1149      callee_save_method_frame_infos_[i] = x86_64::X86_64CalleeSaveMethodFrameInfo(type);
1150    }
1151  } else if (instruction_set_ == kArm64) {
1152    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1153      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1154      callee_save_method_frame_infos_[i] = arm64::Arm64CalleeSaveMethodFrameInfo(type);
1155    }
1156  } else {
1157    UNIMPLEMENTED(FATAL) << instruction_set_;
1158  }
1159}
1160
1161void Runtime::SetCalleeSaveMethod(mirror::ArtMethod* method, CalleeSaveType type) {
1162  DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastCalleeSaveType));
1163  callee_save_methods_[type] = GcRoot<mirror::ArtMethod>(method);
1164}
1165
1166const std::vector<const DexFile*>& Runtime::GetCompileTimeClassPath(jobject class_loader) {
1167  if (class_loader == NULL) {
1168    return GetClassLinker()->GetBootClassPath();
1169  }
1170  CHECK(UseCompileTimeClassPath());
1171  CompileTimeClassPaths::const_iterator it = compile_time_class_paths_.find(class_loader);
1172  CHECK(it != compile_time_class_paths_.end());
1173  return it->second;
1174}
1175
1176void Runtime::SetCompileTimeClassPath(jobject class_loader,
1177                                      std::vector<const DexFile*>& class_path) {
1178  CHECK(!IsStarted());
1179  use_compile_time_class_path_ = true;
1180  compile_time_class_paths_.Put(class_loader, class_path);
1181}
1182
1183void Runtime::AddMethodVerifier(verifier::MethodVerifier* verifier) {
1184  DCHECK(verifier != nullptr);
1185  MutexLock mu(Thread::Current(), method_verifier_lock_);
1186  method_verifiers_.insert(verifier);
1187}
1188
1189void Runtime::RemoveMethodVerifier(verifier::MethodVerifier* verifier) {
1190  DCHECK(verifier != nullptr);
1191  MutexLock mu(Thread::Current(), method_verifier_lock_);
1192  auto it = method_verifiers_.find(verifier);
1193  CHECK(it != method_verifiers_.end());
1194  method_verifiers_.erase(it);
1195}
1196
1197void Runtime::StartProfiler(const char* profile_output_filename) {
1198  profile_output_filename_ = profile_output_filename;
1199  profiler_started_ =
1200    BackgroundMethodSamplingProfiler::Start(profile_output_filename_, profiler_options_);
1201}
1202
1203// Transaction support.
1204void Runtime::EnterTransactionMode(Transaction* transaction) {
1205  DCHECK(IsCompiler());
1206  DCHECK(transaction != nullptr);
1207  DCHECK(!IsActiveTransaction());
1208  preinitialization_transaction_ = transaction;
1209}
1210
1211void Runtime::ExitTransactionMode() {
1212  DCHECK(IsCompiler());
1213  DCHECK(IsActiveTransaction());
1214  preinitialization_transaction_ = nullptr;
1215}
1216
1217void Runtime::RecordWriteField32(mirror::Object* obj, MemberOffset field_offset,
1218                                 uint32_t value, bool is_volatile) const {
1219  DCHECK(IsCompiler());
1220  DCHECK(IsActiveTransaction());
1221  preinitialization_transaction_->RecordWriteField32(obj, field_offset, value, is_volatile);
1222}
1223
1224void Runtime::RecordWriteField64(mirror::Object* obj, MemberOffset field_offset,
1225                                 uint64_t value, bool is_volatile) const {
1226  DCHECK(IsCompiler());
1227  DCHECK(IsActiveTransaction());
1228  preinitialization_transaction_->RecordWriteField64(obj, field_offset, value, is_volatile);
1229}
1230
1231void Runtime::RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset,
1232                                        mirror::Object* value, bool is_volatile) const {
1233  DCHECK(IsCompiler());
1234  DCHECK(IsActiveTransaction());
1235  preinitialization_transaction_->RecordWriteFieldReference(obj, field_offset, value, is_volatile);
1236}
1237
1238void Runtime::RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const {
1239  DCHECK(IsCompiler());
1240  DCHECK(IsActiveTransaction());
1241  preinitialization_transaction_->RecordWriteArray(array, index, value);
1242}
1243
1244void Runtime::RecordStrongStringInsertion(mirror::String* s, uint32_t hash_code) const {
1245  DCHECK(IsCompiler());
1246  DCHECK(IsActiveTransaction());
1247  preinitialization_transaction_->RecordStrongStringInsertion(s, hash_code);
1248}
1249
1250void Runtime::RecordWeakStringInsertion(mirror::String* s, uint32_t hash_code) const {
1251  DCHECK(IsCompiler());
1252  DCHECK(IsActiveTransaction());
1253  preinitialization_transaction_->RecordWeakStringInsertion(s, hash_code);
1254}
1255
1256void Runtime::RecordStrongStringRemoval(mirror::String* s, uint32_t hash_code) const {
1257  DCHECK(IsCompiler());
1258  DCHECK(IsActiveTransaction());
1259  preinitialization_transaction_->RecordStrongStringRemoval(s, hash_code);
1260}
1261
1262void Runtime::RecordWeakStringRemoval(mirror::String* s, uint32_t hash_code) const {
1263  DCHECK(IsCompiler());
1264  DCHECK(IsActiveTransaction());
1265  preinitialization_transaction_->RecordWeakStringRemoval(s, hash_code);
1266}
1267
1268void Runtime::SetFaultMessage(const std::string& message) {
1269  MutexLock mu(Thread::Current(), fault_message_lock_);
1270  fault_message_ = message;
1271}
1272
1273void Runtime::AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* argv)
1274    const {
1275  if (GetInstrumentation()->InterpretOnly()) {
1276    argv->push_back("--compiler-filter=interpret-only");
1277  }
1278
1279  // Make the dex2oat instruction set match that of the launching runtime. If we have multiple
1280  // architecture support, dex2oat may be compiled as a different instruction-set than that
1281  // currently being executed.
1282  std::string instruction_set("--instruction-set=");
1283  instruction_set += GetInstructionSetString(kRuntimeISA);
1284  argv->push_back(instruction_set);
1285
1286  std::string features("--instruction-set-features=");
1287  features += GetDefaultInstructionSetFeatures();
1288  argv->push_back(features);
1289}
1290
1291void Runtime::UpdateProfilerState(int state) {
1292  VLOG(profiler) << "Profiler state updated to " << state;
1293}
1294}  // namespace art
1295