runtime.cc revision 7624d25dad2d1ba25969ae704fccf68649103ae5 
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#include <linux/fs.h>
22
23#include <signal.h>
24#include <sys/syscall.h>
25#include <valgrind.h>
26
27#include <cstdio>
28#include <cstdlib>
29#include <limits>
30#include <vector>
31#include <fcntl.h>
32
33#include "arch/arm/quick_method_frame_info_arm.h"
34#include "arch/arm/registers_arm.h"
35#include "arch/arm64/quick_method_frame_info_arm64.h"
36#include "arch/arm64/registers_arm64.h"
37#include "arch/mips/quick_method_frame_info_mips.h"
38#include "arch/mips/registers_mips.h"
39#include "arch/x86/quick_method_frame_info_x86.h"
40#include "arch/x86/registers_x86.h"
41#include "arch/x86_64/quick_method_frame_info_x86_64.h"
42#include "arch/x86_64/registers_x86_64.h"
43#include "atomic.h"
44#include "class_linker.h"
45#include "debugger.h"
46#include "gc/accounting/card_table-inl.h"
47#include "gc/heap.h"
48#include "gc/space/space.h"
49#include "image.h"
50#include "instrumentation.h"
51#include "intern_table.h"
52#include "jni_internal.h"
53#include "mirror/art_field-inl.h"
54#include "mirror/art_method-inl.h"
55#include "mirror/array.h"
56#include "mirror/class-inl.h"
57#include "mirror/class_loader.h"
58#include "mirror/stack_trace_element.h"
59#include "mirror/throwable.h"
60#include "monitor.h"
61#include "parsed_options.h"
62#include "oat_file.h"
63#include "quick/quick_method_frame_info.h"
64#include "reflection.h"
65#include "ScopedLocalRef.h"
66#include "scoped_thread_state_change.h"
67#include "signal_catcher.h"
68#include "signal_set.h"
69#include "sirt_ref.h"
70#include "thread.h"
71#include "thread_list.h"
72#include "trace.h"
73#include "transaction.h"
74#include "profiler.h"
75#include "UniquePtr.h"
76#include "verifier/method_verifier.h"
77#include "well_known_classes.h"
78
79#include "JniConstants.h"  // Last to avoid LOG redefinition in ics-mr1-plus-art.
80
81#ifdef HAVE_ANDROID_OS
82#include "cutils/properties.h"
83#endif
84
85namespace art {
86
87static constexpr bool kEnableJavaStackTraceHandler = true;
88const char* Runtime::kDefaultInstructionSetFeatures =
89    STRINGIFY(ART_DEFAULT_INSTRUCTION_SET_FEATURES);
90Runtime* Runtime::instance_ = NULL;
91
92Runtime::Runtime()
93    : pre_allocated_OutOfMemoryError_(nullptr),
94      resolution_method_(nullptr),
95      imt_conflict_method_(nullptr),
96      default_imt_(nullptr),
97      instruction_set_(kNone),
98      compiler_callbacks_(nullptr),
99      is_zygote_(false),
100      is_concurrent_gc_enabled_(true),
101      is_explicit_gc_disabled_(false),
102      default_stack_size_(0),
103      heap_(nullptr),
104      max_spins_before_thin_lock_inflation_(Monitor::kDefaultMaxSpinsBeforeThinLockInflation),
105      monitor_list_(nullptr),
106      monitor_pool_(nullptr),
107      thread_list_(nullptr),
108      intern_table_(nullptr),
109      class_linker_(nullptr),
110      signal_catcher_(nullptr),
111      java_vm_(nullptr),
112      fault_message_lock_("Fault message lock"),
113      fault_message_(""),
114      method_verifier_lock_("Method verifiers lock"),
115      threads_being_born_(0),
116      shutdown_cond_(new ConditionVariable("Runtime shutdown", *Locks::runtime_shutdown_lock_)),
117      shutting_down_(false),
118      shutting_down_started_(false),
119      started_(false),
120      finished_starting_(false),
121      vfprintf_(nullptr),
122      exit_(nullptr),
123      abort_(nullptr),
124      stats_enabled_(false),
125      running_on_valgrind_(RUNNING_ON_VALGRIND > 0),
126      profile_(false),
127      profile_period_s_(0),
128      profile_duration_s_(0),
129      profile_interval_us_(0),
130      profile_backoff_coefficient_(0),
131      profile_start_immediately_(true),
132      method_trace_(false),
133      method_trace_file_size_(0),
134      instrumentation_(),
135      use_compile_time_class_path_(false),
136      main_thread_group_(nullptr),
137      system_thread_group_(nullptr),
138      system_class_loader_(nullptr),
139      dump_gc_performance_on_shutdown_(false),
140      preinitialization_transaction_(nullptr),
141      null_pointer_handler_(nullptr),
142      suspend_handler_(nullptr),
143      stack_overflow_handler_(nullptr),
144      verify_(false) {
145  for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
146    callee_save_methods_[i] = nullptr;
147  }
148}
149
150Runtime::~Runtime() {
151  if (dump_gc_performance_on_shutdown_) {
152    // This can't be called from the Heap destructor below because it
153    // could call RosAlloc::InspectAll() which needs the thread_list
154    // to be still alive.
155    heap_->DumpGcPerformanceInfo(LOG(INFO));
156  }
157
158  Thread* self = Thread::Current();
159  {
160    MutexLock mu(self, *Locks::runtime_shutdown_lock_);
161    shutting_down_started_ = true;
162    while (threads_being_born_ > 0) {
163      shutdown_cond_->Wait(self);
164    }
165    shutting_down_ = true;
166  }
167  Trace::Shutdown();
168
169  // Make sure to let the GC complete if it is running.
170  heap_->WaitForGcToComplete(gc::kGcCauseBackground, self);
171  heap_->DeleteThreadPool();
172
173  // Make sure our internal threads are dead before we start tearing down things they're using.
174  Dbg::StopJdwp();
175  delete signal_catcher_;
176
177  // Make sure all other non-daemon threads have terminated, and all daemon threads are suspended.
178  delete thread_list_;
179  delete monitor_list_;
180  delete monitor_pool_;
181  delete class_linker_;
182  delete heap_;
183  delete intern_table_;
184  delete java_vm_;
185  Thread::Shutdown();
186  QuasiAtomic::Shutdown();
187  verifier::MethodVerifier::Shutdown();
188  // TODO: acquire a static mutex on Runtime to avoid racing.
189  CHECK(instance_ == nullptr || instance_ == this);
190  instance_ = nullptr;
191
192  delete null_pointer_handler_;
193  delete suspend_handler_;
194  delete stack_overflow_handler_;
195}
196
197struct AbortState {
198  void Dump(std::ostream& os) NO_THREAD_SAFETY_ANALYSIS {
199    if (gAborting > 1) {
200      os << "Runtime aborting --- recursively, so no thread-specific detail!\n";
201      return;
202    }
203    gAborting++;
204    os << "Runtime aborting...\n";
205    if (Runtime::Current() == NULL) {
206      os << "(Runtime does not yet exist!)\n";
207      return;
208    }
209    Thread* self = Thread::Current();
210    if (self == nullptr) {
211      os << "(Aborting thread was not attached to runtime!)\n";
212    } else {
213      os << "Aborting thread:\n";
214      if (Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)) {
215        DumpThread(os, self);
216      } else {
217        if (Locks::mutator_lock_->SharedTryLock(self)) {
218          DumpThread(os, self);
219          Locks::mutator_lock_->SharedUnlock(self);
220        }
221      }
222    }
223    DumpAllThreads(os, self);
224  }
225
226  void DumpThread(std::ostream& os, Thread* self) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
227    self->Dump(os);
228    if (self->IsExceptionPending()) {
229      ThrowLocation throw_location;
230      mirror::Throwable* exception = self->GetException(&throw_location);
231      os << "Pending exception " << PrettyTypeOf(exception)
232          << " thrown by '" << throw_location.Dump() << "'\n"
233          << exception->Dump();
234    }
235  }
236
237  void DumpAllThreads(std::ostream& os, Thread* self) NO_THREAD_SAFETY_ANALYSIS {
238    bool tll_already_held = Locks::thread_list_lock_->IsExclusiveHeld(self);
239    bool ml_already_held = Locks::mutator_lock_->IsSharedHeld(self);
240    if (!tll_already_held || !ml_already_held) {
241      os << "Dumping all threads without appropriate locks held:"
242          << (!tll_already_held ? " thread list lock" : "")
243          << (!ml_already_held ? " mutator lock" : "")
244          << "\n";
245    }
246    os << "All threads:\n";
247    Runtime::Current()->GetThreadList()->DumpLocked(os);
248  }
249};
250
251void Runtime::Abort() {
252  gAborting++;  // set before taking any locks
253
254  // Ensure that we don't have multiple threads trying to abort at once,
255  // which would result in significantly worse diagnostics.
256  MutexLock mu(Thread::Current(), *Locks::abort_lock_);
257
258  // Get any pending output out of the way.
259  fflush(NULL);
260
261  // Many people have difficulty distinguish aborts from crashes,
262  // so be explicit.
263  AbortState state;
264  LOG(INTERNAL_FATAL) << Dumpable<AbortState>(state);
265
266  // Call the abort hook if we have one.
267  if (Runtime::Current() != NULL && Runtime::Current()->abort_ != NULL) {
268    LOG(INTERNAL_FATAL) << "Calling abort hook...";
269    Runtime::Current()->abort_();
270    // notreached
271    LOG(INTERNAL_FATAL) << "Unexpectedly returned from abort hook!";
272  }
273
274#if defined(__GLIBC__)
275  // TODO: we ought to be able to use pthread_kill(3) here (or abort(3),
276  // which POSIX defines in terms of raise(3), which POSIX defines in terms
277  // of pthread_kill(3)). On Linux, though, libcorkscrew can't unwind through
278  // libpthread, which means the stacks we dump would be useless. Calling
279  // tgkill(2) directly avoids that.
280  syscall(__NR_tgkill, getpid(), GetTid(), SIGABRT);
281  // TODO: LLVM installs it's own SIGABRT handler so exit to be safe... Can we disable that in LLVM?
282  // If not, we could use sigaction(3) before calling tgkill(2) and lose this call to exit(3).
283  exit(1);
284#else
285  abort();
286#endif
287  // notreached
288}
289
290void Runtime::PreZygoteFork() {
291  heap_->PreZygoteFork();
292}
293
294void Runtime::CallExitHook(jint status) {
295  if (exit_ != NULL) {
296    ScopedThreadStateChange tsc(Thread::Current(), kNative);
297    exit_(status);
298    LOG(WARNING) << "Exit hook returned instead of exiting!";
299  }
300}
301
302void Runtime::SweepSystemWeaks(IsMarkedCallback* visitor, void* arg) {
303  GetInternTable()->SweepInternTableWeaks(visitor, arg);
304  GetMonitorList()->SweepMonitorList(visitor, arg);
305  GetJavaVM()->SweepJniWeakGlobals(visitor, arg);
306  Dbg::UpdateObjectPointers(visitor, arg);
307}
308
309bool Runtime::Create(const Options& options, bool ignore_unrecognized) {
310  // TODO: acquire a static mutex on Runtime to avoid racing.
311  if (Runtime::instance_ != NULL) {
312    return false;
313  }
314  InitLogging(NULL);  // Calls Locks::Init() as a side effect.
315  instance_ = new Runtime;
316  if (!instance_->Init(options, ignore_unrecognized)) {
317    delete instance_;
318    instance_ = NULL;
319    return false;
320  }
321  return true;
322}
323
324jobject CreateSystemClassLoader() {
325  if (Runtime::Current()->UseCompileTimeClassPath()) {
326    return NULL;
327  }
328
329  ScopedObjectAccess soa(Thread::Current());
330  ClassLinker* cl = Runtime::Current()->GetClassLinker();
331
332  SirtRef<mirror::Class> class_loader_class(
333      soa.Self(), soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_ClassLoader));
334  CHECK(cl->EnsureInitialized(class_loader_class, true, true));
335
336  mirror::ArtMethod* getSystemClassLoader =
337      class_loader_class->FindDirectMethod("getSystemClassLoader", "()Ljava/lang/ClassLoader;");
338  CHECK(getSystemClassLoader != NULL);
339
340  JValue result = InvokeWithJValues(soa, nullptr, soa.EncodeMethod(getSystemClassLoader), nullptr);
341  SirtRef<mirror::ClassLoader> class_loader(soa.Self(),
342                                            down_cast<mirror::ClassLoader*>(result.GetL()));
343  CHECK(class_loader.get() != nullptr);
344  JNIEnv* env = soa.Self()->GetJniEnv();
345  ScopedLocalRef<jobject> system_class_loader(env,
346                                              soa.AddLocalReference<jobject>(class_loader.get()));
347  CHECK(system_class_loader.get() != nullptr);
348
349  soa.Self()->SetClassLoaderOverride(class_loader.get());
350
351  SirtRef<mirror::Class> thread_class(
352      soa.Self(),
353      soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_Thread));
354  CHECK(cl->EnsureInitialized(thread_class, true, true));
355
356  mirror::ArtField* contextClassLoader =
357      thread_class->FindDeclaredInstanceField("contextClassLoader", "Ljava/lang/ClassLoader;");
358  CHECK(contextClassLoader != NULL);
359
360  // We can't run in a transaction yet.
361  contextClassLoader->SetObject<false>(soa.Self()->GetPeer(), class_loader.get());
362
363  return env->NewGlobalRef(system_class_loader.get());
364}
365
366bool Runtime::Start() {
367  VLOG(startup) << "Runtime::Start entering";
368
369  // Restore main thread state to kNative as expected by native code.
370  Thread* self = Thread::Current();
371  self->TransitionFromRunnableToSuspended(kNative);
372
373  started_ = true;
374
375  // InitNativeMethods needs to be after started_ so that the classes
376  // it touches will have methods linked to the oat file if necessary.
377  InitNativeMethods();
378
379  // Initialize well known thread group values that may be accessed threads while attaching.
380  InitThreadGroups(self);
381
382  Thread::FinishStartup();
383
384  if (is_zygote_) {
385    if (!InitZygote()) {
386      return false;
387    }
388  } else {
389    DidForkFromZygote();
390  }
391
392  StartDaemonThreads();
393
394  system_class_loader_ = CreateSystemClassLoader();
395
396  self->GetJniEnv()->locals.AssertEmpty();
397
398  VLOG(startup) << "Runtime::Start exiting";
399
400  finished_starting_ = true;
401
402  if (profile_) {
403    // User has asked for a profile using -Xprofile
404    // Create the profile file if it doesn't exist.
405    int fd = open(profile_output_filename_.c_str(), O_RDWR|O_CREAT|O_EXCL, 0660);
406    if (fd >= 0) {
407      close(fd);
408    }
409    StartProfiler(profile_output_filename_.c_str(), "");
410  }
411
412  return true;
413}
414
415void Runtime::EndThreadBirth() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) {
416  DCHECK_GT(threads_being_born_, 0U);
417  threads_being_born_--;
418  if (shutting_down_started_ && threads_being_born_ == 0) {
419    shutdown_cond_->Broadcast(Thread::Current());
420  }
421}
422
423// Do zygote-mode-only initialization.
424bool Runtime::InitZygote() {
425  // zygote goes into its own process group
426  setpgid(0, 0);
427
428  // See storage config details at http://source.android.com/tech/storage/
429  // Create private mount namespace shared by all children
430  if (unshare(CLONE_NEWNS) == -1) {
431    PLOG(WARNING) << "Failed to unshare()";
432    return false;
433  }
434
435  // Mark rootfs as being a slave so that changes from default
436  // namespace only flow into our children.
437  if (mount("rootfs", "/", NULL, (MS_SLAVE | MS_REC), NULL) == -1) {
438    PLOG(WARNING) << "Failed to mount() rootfs as MS_SLAVE";
439    return false;
440  }
441
442  // Create a staging tmpfs that is shared by our children; they will
443  // bind mount storage into their respective private namespaces, which
444  // are isolated from each other.
445  const char* target_base = getenv("EMULATED_STORAGE_TARGET");
446  if (target_base != NULL) {
447    if (mount("tmpfs", target_base, "tmpfs", MS_NOSUID | MS_NODEV,
448              "uid=0,gid=1028,mode=0751") == -1) {
449      LOG(WARNING) << "Failed to mount tmpfs to " << target_base;
450      return false;
451    }
452  }
453
454  return true;
455}
456
457void Runtime::DidForkFromZygote() {
458  is_zygote_ = false;
459
460  // Create the thread pool.
461  heap_->CreateThreadPool();
462
463  StartSignalCatcher();
464
465  // Start the JDWP thread. If the command-line debugger flags specified "suspend=y",
466  // this will pause the runtime, so we probably want this to come last.
467  Dbg::StartJdwp();
468}
469
470void Runtime::StartSignalCatcher() {
471  if (!is_zygote_) {
472    signal_catcher_ = new SignalCatcher(stack_trace_file_);
473  }
474}
475
476bool Runtime::IsShuttingDown(Thread* self) {
477  MutexLock mu(self, *Locks::runtime_shutdown_lock_);
478  return IsShuttingDownLocked();
479}
480
481void Runtime::StartDaemonThreads() {
482  VLOG(startup) << "Runtime::StartDaemonThreads entering";
483
484  Thread* self = Thread::Current();
485
486  // Must be in the kNative state for calling native methods.
487  CHECK_EQ(self->GetState(), kNative);
488
489  JNIEnv* env = self->GetJniEnv();
490  env->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons,
491                            WellKnownClasses::java_lang_Daemons_start);
492  if (env->ExceptionCheck()) {
493    env->ExceptionDescribe();
494    LOG(FATAL) << "Error starting java.lang.Daemons";
495  }
496
497  VLOG(startup) << "Runtime::StartDaemonThreads exiting";
498}
499
500bool Runtime::Init(const Options& raw_options, bool ignore_unrecognized) {
501  CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize);
502
503  UniquePtr<ParsedOptions> options(ParsedOptions::Create(raw_options, ignore_unrecognized));
504  if (options.get() == NULL) {
505    LOG(ERROR) << "Failed to parse options";
506    return false;
507  }
508  VLOG(startup) << "Runtime::Init -verbose:startup enabled";
509
510  QuasiAtomic::Startup();
511
512  Monitor::Init(options->lock_profiling_threshold_, options->hook_is_sensitive_thread_);
513
514  boot_class_path_string_ = options->boot_class_path_string_;
515  class_path_string_ = options->class_path_string_;
516  properties_ = options->properties_;
517
518  compiler_callbacks_ = options->compiler_callbacks_;
519  is_zygote_ = options->is_zygote_;
520  is_explicit_gc_disabled_ = options->is_explicit_gc_disabled_;
521
522  vfprintf_ = options->hook_vfprintf_;
523  exit_ = options->hook_exit_;
524  abort_ = options->hook_abort_;
525
526  default_stack_size_ = options->stack_size_;
527  stack_trace_file_ = options->stack_trace_file_;
528
529  compiler_options_ = options->compiler_options_;
530  image_compiler_options_ = options->image_compiler_options_;
531
532  max_spins_before_thin_lock_inflation_ = options->max_spins_before_thin_lock_inflation_;
533
534  monitor_list_ = new MonitorList;
535  monitor_pool_ = MonitorPool::Create();
536  thread_list_ = new ThreadList;
537  intern_table_ = new InternTable;
538
539  verify_ = options->verify_;
540
541  if (options->interpreter_only_) {
542    GetInstrumentation()->ForceInterpretOnly();
543  }
544
545  if (options->explicit_checks_ != (ParsedOptions::kExplicitSuspendCheck |
546        ParsedOptions::kExplicitNullCheck |
547        ParsedOptions::kExplicitStackOverflowCheck) || kEnableJavaStackTraceHandler) {
548    fault_manager.Init();
549
550    // These need to be in a specific order.  The null point check handler must be
551    // after the suspend check and stack overflow check handlers.
552    if ((options->explicit_checks_ & ParsedOptions::kExplicitSuspendCheck) == 0) {
553      suspend_handler_ = new SuspensionHandler(&fault_manager);
554    }
555
556    if ((options->explicit_checks_ & ParsedOptions::kExplicitStackOverflowCheck) == 0) {
557      stack_overflow_handler_ = new StackOverflowHandler(&fault_manager);
558    }
559
560    if ((options->explicit_checks_ & ParsedOptions::kExplicitNullCheck) == 0) {
561      null_pointer_handler_ = new NullPointerHandler(&fault_manager);
562    }
563
564    if (kEnableJavaStackTraceHandler) {
565      new JavaStackTraceHandler(&fault_manager);
566    }
567  }
568
569  heap_ = new gc::Heap(options->heap_initial_size_,
570                       options->heap_growth_limit_,
571                       options->heap_min_free_,
572                       options->heap_max_free_,
573                       options->heap_target_utilization_,
574                       options->foreground_heap_growth_multiplier_,
575                       options->heap_maximum_size_,
576                       options->image_,
577                       options->image_isa_,
578                       options->collector_type_,
579                       options->background_collector_type_,
580                       options->parallel_gc_threads_,
581                       options->conc_gc_threads_,
582                       options->low_memory_mode_,
583                       options->long_pause_log_threshold_,
584                       options->long_gc_log_threshold_,
585                       options->ignore_max_footprint_,
586                       options->use_tlab_,
587                       options->verify_pre_gc_heap_,
588                       options->verify_pre_sweeping_heap_,
589                       options->verify_post_gc_heap_,
590                       options->verify_pre_gc_rosalloc_,
591                       options->verify_pre_sweeping_rosalloc_,
592                       options->verify_post_gc_rosalloc_);
593
594  dump_gc_performance_on_shutdown_ = options->dump_gc_performance_on_shutdown_;
595
596  BlockSignals();
597  InitPlatformSignalHandlers();
598
599  java_vm_ = new JavaVMExt(this, options.get());
600
601  Thread::Startup();
602
603  // ClassLinker needs an attached thread, but we can't fully attach a thread without creating
604  // objects. We can't supply a thread group yet; it will be fixed later. Since we are the main
605  // thread, we do not get a java peer.
606  Thread* self = Thread::Attach("main", false, NULL, false);
607  CHECK_EQ(self->GetThreadId(), ThreadList::kMainThreadId);
608  CHECK(self != NULL);
609
610  // Set us to runnable so tools using a runtime can allocate and GC by default
611  self->TransitionFromSuspendedToRunnable();
612
613  // Now we're attached, we can take the heap locks and validate the heap.
614  GetHeap()->EnableObjectValidation();
615
616  CHECK_GE(GetHeap()->GetContinuousSpaces().size(), 1U);
617  class_linker_ = new ClassLinker(intern_table_);
618  if (GetHeap()->HasImageSpace()) {
619    class_linker_->InitFromImage();
620  } else {
621    CHECK(options->boot_class_path_ != NULL);
622    CHECK_NE(options->boot_class_path_->size(), 0U);
623    class_linker_->InitFromCompiler(*options->boot_class_path_);
624  }
625  CHECK(class_linker_ != NULL);
626  verifier::MethodVerifier::Init();
627
628  method_trace_ = options->method_trace_;
629  method_trace_file_ = options->method_trace_file_;
630  method_trace_file_size_ = options->method_trace_file_size_;
631
632  // Extract the profile options.
633  // TODO: move into a Trace options struct?
634  profile_period_s_ = options->profile_period_s_;
635  profile_duration_s_ = options->profile_duration_s_;
636  profile_interval_us_ = options->profile_interval_us_;
637  profile_backoff_coefficient_ = options->profile_backoff_coefficient_;
638  profile_start_immediately_ = options->profile_start_immediately_;
639  profile_ = options->profile_;
640  profile_output_filename_ = options->profile_output_filename_;
641  // TODO: move this to just be an Trace::Start argument
642  Trace::SetDefaultClockSource(options->profile_clock_source_);
643
644  if (options->method_trace_) {
645    Trace::Start(options->method_trace_file_.c_str(), -1, options->method_trace_file_size_, 0,
646                 false, false, 0);
647  }
648
649  // Pre-allocate an OutOfMemoryError for the double-OOME case.
650  self->ThrowNewException(ThrowLocation(), "Ljava/lang/OutOfMemoryError;",
651                          "OutOfMemoryError thrown while trying to throw OutOfMemoryError; "
652                          "no stack available");
653  pre_allocated_OutOfMemoryError_ = self->GetException(NULL);
654  self->ClearException();
655
656  VLOG(startup) << "Runtime::Init exiting";
657  return true;
658}
659
660void Runtime::InitNativeMethods() {
661  VLOG(startup) << "Runtime::InitNativeMethods entering";
662  Thread* self = Thread::Current();
663  JNIEnv* env = self->GetJniEnv();
664
665  // Must be in the kNative state for calling native methods (JNI_OnLoad code).
666  CHECK_EQ(self->GetState(), kNative);
667
668  // First set up JniConstants, which is used by both the runtime's built-in native
669  // methods and libcore.
670  JniConstants::init(env);
671  WellKnownClasses::Init(env);
672
673  // Then set up the native methods provided by the runtime itself.
674  RegisterRuntimeNativeMethods(env);
675
676  // Then set up libcore, which is just a regular JNI library with a regular JNI_OnLoad.
677  // Most JNI libraries can just use System.loadLibrary, but libcore can't because it's
678  // the library that implements System.loadLibrary!
679  {
680    std::string mapped_name(StringPrintf(OS_SHARED_LIB_FORMAT_STR, "javacore"));
681    std::string reason;
682    self->TransitionFromSuspendedToRunnable();
683    SirtRef<mirror::ClassLoader> class_loader(self, nullptr);
684    if (!instance_->java_vm_->LoadNativeLibrary(mapped_name, class_loader, &reason)) {
685      LOG(FATAL) << "LoadNativeLibrary failed for \"" << mapped_name << "\": " << reason;
686    }
687    self->TransitionFromRunnableToSuspended(kNative);
688  }
689
690  // Initialize well known classes that may invoke runtime native methods.
691  WellKnownClasses::LateInit(env);
692
693  VLOG(startup) << "Runtime::InitNativeMethods exiting";
694}
695
696void Runtime::InitThreadGroups(Thread* self) {
697  JNIEnvExt* env = self->GetJniEnv();
698  ScopedJniEnvLocalRefState env_state(env);
699  main_thread_group_ =
700      env->NewGlobalRef(env->GetStaticObjectField(
701          WellKnownClasses::java_lang_ThreadGroup,
702          WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup));
703  CHECK(main_thread_group_ != NULL || IsCompiler());
704  system_thread_group_ =
705      env->NewGlobalRef(env->GetStaticObjectField(
706          WellKnownClasses::java_lang_ThreadGroup,
707          WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup));
708  CHECK(system_thread_group_ != NULL || IsCompiler());
709}
710
711jobject Runtime::GetMainThreadGroup() const {
712  CHECK(main_thread_group_ != NULL || IsCompiler());
713  return main_thread_group_;
714}
715
716jobject Runtime::GetSystemThreadGroup() const {
717  CHECK(system_thread_group_ != NULL || IsCompiler());
718  return system_thread_group_;
719}
720
721jobject Runtime::GetSystemClassLoader() const {
722  CHECK(system_class_loader_ != NULL || IsCompiler());
723  return system_class_loader_;
724}
725
726void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) {
727#define REGISTER(FN) extern void FN(JNIEnv*); FN(env)
728  // Register Throwable first so that registration of other native methods can throw exceptions
729  REGISTER(register_java_lang_Throwable);
730  REGISTER(register_dalvik_system_DexFile);
731  REGISTER(register_dalvik_system_VMDebug);
732  REGISTER(register_dalvik_system_VMRuntime);
733  REGISTER(register_dalvik_system_VMStack);
734  REGISTER(register_dalvik_system_ZygoteHooks);
735  REGISTER(register_java_lang_Class);
736  REGISTER(register_java_lang_DexCache);
737  REGISTER(register_java_lang_Object);
738  REGISTER(register_java_lang_Runtime);
739  REGISTER(register_java_lang_String);
740  REGISTER(register_java_lang_System);
741  REGISTER(register_java_lang_Thread);
742  REGISTER(register_java_lang_VMClassLoader);
743  REGISTER(register_java_lang_ref_Reference);
744  REGISTER(register_java_lang_reflect_Array);
745  REGISTER(register_java_lang_reflect_Constructor);
746  REGISTER(register_java_lang_reflect_Field);
747  REGISTER(register_java_lang_reflect_Method);
748  REGISTER(register_java_lang_reflect_Proxy);
749  REGISTER(register_java_util_concurrent_atomic_AtomicLong);
750  REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmServer);
751  REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmVmInternal);
752  REGISTER(register_sun_misc_Unsafe);
753#undef REGISTER
754}
755
756void Runtime::DumpForSigQuit(std::ostream& os) {
757  GetClassLinker()->DumpForSigQuit(os);
758  GetInternTable()->DumpForSigQuit(os);
759  GetJavaVM()->DumpForSigQuit(os);
760  GetHeap()->DumpForSigQuit(os);
761  os << "\n";
762
763  thread_list_->DumpForSigQuit(os);
764  BaseMutex::DumpAll(os);
765}
766
767void Runtime::DumpLockHolders(std::ostream& os) {
768  uint64_t mutator_lock_owner = Locks::mutator_lock_->GetExclusiveOwnerTid();
769  pid_t thread_list_lock_owner = GetThreadList()->GetLockOwner();
770  pid_t classes_lock_owner = GetClassLinker()->GetClassesLockOwner();
771  pid_t dex_lock_owner = GetClassLinker()->GetDexLockOwner();
772  if ((thread_list_lock_owner | classes_lock_owner | dex_lock_owner) != 0) {
773    os << "Mutator lock exclusive owner tid: " << mutator_lock_owner << "\n"
774       << "ThreadList lock owner tid: " << thread_list_lock_owner << "\n"
775       << "ClassLinker classes lock owner tid: " << classes_lock_owner << "\n"
776       << "ClassLinker dex lock owner tid: " << dex_lock_owner << "\n";
777  }
778}
779
780void Runtime::SetStatsEnabled(bool new_state) {
781  if (new_state == true) {
782    GetStats()->Clear(~0);
783    // TODO: wouldn't it make more sense to clear _all_ threads' stats?
784    Thread::Current()->GetStats()->Clear(~0);
785    GetInstrumentation()->InstrumentQuickAllocEntryPoints();
786  } else {
787    GetInstrumentation()->UninstrumentQuickAllocEntryPoints();
788  }
789  stats_enabled_ = new_state;
790}
791
792void Runtime::ResetStats(int kinds) {
793  GetStats()->Clear(kinds & 0xffff);
794  // TODO: wouldn't it make more sense to clear _all_ threads' stats?
795  Thread::Current()->GetStats()->Clear(kinds >> 16);
796}
797
798int32_t Runtime::GetStat(int kind) {
799  RuntimeStats* stats;
800  if (kind < (1<<16)) {
801    stats = GetStats();
802  } else {
803    stats = Thread::Current()->GetStats();
804    kind >>= 16;
805  }
806  switch (kind) {
807  case KIND_ALLOCATED_OBJECTS:
808    return stats->allocated_objects;
809  case KIND_ALLOCATED_BYTES:
810    return stats->allocated_bytes;
811  case KIND_FREED_OBJECTS:
812    return stats->freed_objects;
813  case KIND_FREED_BYTES:
814    return stats->freed_bytes;
815  case KIND_GC_INVOCATIONS:
816    return stats->gc_for_alloc_count;
817  case KIND_CLASS_INIT_COUNT:
818    return stats->class_init_count;
819  case KIND_CLASS_INIT_TIME:
820    // Convert ns to us, reduce to 32 bits.
821    return static_cast<int>(stats->class_init_time_ns / 1000);
822  case KIND_EXT_ALLOCATED_OBJECTS:
823  case KIND_EXT_ALLOCATED_BYTES:
824  case KIND_EXT_FREED_OBJECTS:
825  case KIND_EXT_FREED_BYTES:
826    return 0;  // backward compatibility
827  default:
828    LOG(FATAL) << "Unknown statistic " << kind;
829    return -1;  // unreachable
830  }
831}
832
833void Runtime::BlockSignals() {
834  SignalSet signals;
835  signals.Add(SIGPIPE);
836  // SIGQUIT is used to dump the runtime's state (including stack traces).
837  signals.Add(SIGQUIT);
838  // SIGUSR1 is used to initiate a GC.
839  signals.Add(SIGUSR1);
840  signals.Block();
841}
842
843bool Runtime::AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group,
844                                  bool create_peer) {
845  bool success = Thread::Attach(thread_name, as_daemon, thread_group, create_peer) != NULL;
846  if (thread_name == NULL) {
847    LOG(WARNING) << *Thread::Current() << " attached without supplying a name";
848  }
849  return success;
850}
851
852void Runtime::DetachCurrentThread() {
853  Thread* self = Thread::Current();
854  if (self == NULL) {
855    LOG(FATAL) << "attempting to detach thread that is not attached";
856  }
857  if (self->HasManagedStack()) {
858    LOG(FATAL) << *Thread::Current() << " attempting to detach while still running code";
859  }
860  thread_list_->Unregister(self);
861}
862
863  mirror::Throwable* Runtime::GetPreAllocatedOutOfMemoryError() const {
864  if (pre_allocated_OutOfMemoryError_ == NULL) {
865    LOG(ERROR) << "Failed to return pre-allocated OOME";
866  }
867  return pre_allocated_OutOfMemoryError_;
868}
869
870void Runtime::VisitConstantRoots(RootCallback* callback, void* arg) {
871  // Visit the classes held as static in mirror classes, these can be visited concurrently and only
872  // need to be visited once per GC since they never change.
873  mirror::ArtField::VisitRoots(callback, arg);
874  mirror::ArtMethod::VisitRoots(callback, arg);
875  mirror::Class::VisitRoots(callback, arg);
876  mirror::StackTraceElement::VisitRoots(callback, arg);
877  mirror::String::VisitRoots(callback, arg);
878  mirror::Throwable::VisitRoots(callback, arg);
879  // Visit all the primitive array types classes.
880  mirror::PrimitiveArray<uint8_t>::VisitRoots(callback, arg);   // BooleanArray
881  mirror::PrimitiveArray<int8_t>::VisitRoots(callback, arg);    // ByteArray
882  mirror::PrimitiveArray<uint16_t>::VisitRoots(callback, arg);  // CharArray
883  mirror::PrimitiveArray<double>::VisitRoots(callback, arg);    // DoubleArray
884  mirror::PrimitiveArray<float>::VisitRoots(callback, arg);     // FloatArray
885  mirror::PrimitiveArray<int32_t>::VisitRoots(callback, arg);   // IntArray
886  mirror::PrimitiveArray<int64_t>::VisitRoots(callback, arg);   // LongArray
887  mirror::PrimitiveArray<int16_t>::VisitRoots(callback, arg);   // ShortArray
888}
889
890void Runtime::VisitConcurrentRoots(RootCallback* callback, void* arg, VisitRootFlags flags) {
891  intern_table_->VisitRoots(callback, arg, flags);
892  class_linker_->VisitRoots(callback, arg, flags);
893  Dbg::VisitRoots(callback, arg);
894  if ((flags & kVisitRootFlagNewRoots) == 0) {
895    // Guaranteed to have no new roots in the constant roots.
896    VisitConstantRoots(callback, arg);
897  }
898}
899
900void Runtime::VisitNonThreadRoots(RootCallback* callback, void* arg) {
901  java_vm_->VisitRoots(callback, arg);
902  if (pre_allocated_OutOfMemoryError_ != nullptr) {
903    callback(reinterpret_cast<mirror::Object**>(&pre_allocated_OutOfMemoryError_), arg, 0,
904             kRootVMInternal);
905    DCHECK(pre_allocated_OutOfMemoryError_ != nullptr);
906  }
907  callback(reinterpret_cast<mirror::Object**>(&resolution_method_), arg, 0, kRootVMInternal);
908  DCHECK(resolution_method_ != nullptr);
909  if (HasImtConflictMethod()) {
910    callback(reinterpret_cast<mirror::Object**>(&imt_conflict_method_), arg, 0, kRootVMInternal);
911  }
912  if (HasDefaultImt()) {
913    callback(reinterpret_cast<mirror::Object**>(&default_imt_), arg, 0, kRootVMInternal);
914  }
915  for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
916    if (callee_save_methods_[i] != nullptr) {
917      callback(reinterpret_cast<mirror::Object**>(&callee_save_methods_[i]), arg, 0,
918               kRootVMInternal);
919    }
920  }
921  {
922    MutexLock mu(Thread::Current(), method_verifier_lock_);
923    for (verifier::MethodVerifier* verifier : method_verifiers_) {
924      verifier->VisitRoots(callback, arg);
925    }
926  }
927  if (preinitialization_transaction_ != nullptr) {
928    preinitialization_transaction_->VisitRoots(callback, arg);
929  }
930  instrumentation_.VisitRoots(callback, arg);
931}
932
933void Runtime::VisitNonConcurrentRoots(RootCallback* callback, void* arg) {
934  thread_list_->VisitRoots(callback, arg);
935  VisitNonThreadRoots(callback, arg);
936}
937
938void Runtime::VisitRoots(RootCallback* callback, void* arg, VisitRootFlags flags) {
939  VisitConcurrentRoots(callback, arg, flags);
940  VisitNonConcurrentRoots(callback, arg);
941}
942
943mirror::ObjectArray<mirror::ArtMethod>* Runtime::CreateDefaultImt(ClassLinker* cl) {
944  Thread* self = Thread::Current();
945  SirtRef<mirror::ObjectArray<mirror::ArtMethod> > imtable(self, cl->AllocArtMethodArray(self, 64));
946  mirror::ArtMethod* imt_conflict_method = Runtime::Current()->GetImtConflictMethod();
947  for (size_t i = 0; i < static_cast<size_t>(imtable->GetLength()); i++) {
948    imtable->Set<false>(i, imt_conflict_method);
949  }
950  return imtable.get();
951}
952
953mirror::ArtMethod* Runtime::CreateImtConflictMethod() {
954  Thread* self = Thread::Current();
955  Runtime* runtime = Runtime::Current();
956  ClassLinker* class_linker = runtime->GetClassLinker();
957  SirtRef<mirror::ArtMethod> method(self, class_linker->AllocArtMethod(self));
958  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
959  // TODO: use a special method for imt conflict method saves.
960  method->SetDexMethodIndex(DexFile::kDexNoIndex);
961  // When compiling, the code pointer will get set later when the image is loaded.
962  if (runtime->IsCompiler()) {
963    method->SetEntryPointFromPortableCompiledCode(nullptr);
964    method->SetEntryPointFromQuickCompiledCode(nullptr);
965  } else {
966    method->SetEntryPointFromPortableCompiledCode(GetPortableImtConflictTrampoline(class_linker));
967    method->SetEntryPointFromQuickCompiledCode(GetQuickImtConflictTrampoline(class_linker));
968  }
969  return method.get();
970}
971
972mirror::ArtMethod* Runtime::CreateResolutionMethod() {
973  Thread* self = Thread::Current();
974  Runtime* runtime = Runtime::Current();
975  ClassLinker* class_linker = runtime->GetClassLinker();
976  SirtRef<mirror::ArtMethod> method(self, class_linker->AllocArtMethod(self));
977  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
978  // TODO: use a special method for resolution method saves
979  method->SetDexMethodIndex(DexFile::kDexNoIndex);
980  // When compiling, the code pointer will get set later when the image is loaded.
981  if (runtime->IsCompiler()) {
982    method->SetEntryPointFromPortableCompiledCode(nullptr);
983    method->SetEntryPointFromQuickCompiledCode(nullptr);
984  } else {
985    method->SetEntryPointFromPortableCompiledCode(GetPortableResolutionTrampoline(class_linker));
986    method->SetEntryPointFromQuickCompiledCode(GetQuickResolutionTrampoline(class_linker));
987  }
988  return method.get();
989}
990
991mirror::ArtMethod* Runtime::CreateCalleeSaveMethod(CalleeSaveType type) {
992  Thread* self = Thread::Current();
993  Runtime* runtime = Runtime::Current();
994  ClassLinker* class_linker = runtime->GetClassLinker();
995  SirtRef<mirror::ArtMethod> method(self, class_linker->AllocArtMethod(self));
996  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
997  // TODO: use a special method for callee saves
998  method->SetDexMethodIndex(DexFile::kDexNoIndex);
999  method->SetEntryPointFromPortableCompiledCode(nullptr);
1000  method->SetEntryPointFromQuickCompiledCode(nullptr);
1001  DCHECK_NE(instruction_set_, kNone);
1002  return method.get();
1003}
1004
1005void Runtime::DisallowNewSystemWeaks() {
1006  monitor_list_->DisallowNewMonitors();
1007  intern_table_->DisallowNewInterns();
1008  java_vm_->DisallowNewWeakGlobals();
1009  Dbg::DisallowNewObjectRegistryObjects();
1010}
1011
1012void Runtime::AllowNewSystemWeaks() {
1013  monitor_list_->AllowNewMonitors();
1014  intern_table_->AllowNewInterns();
1015  java_vm_->AllowNewWeakGlobals();
1016  Dbg::AllowNewObjectRegistryObjects();
1017}
1018
1019void Runtime::SetInstructionSet(InstructionSet instruction_set) {
1020  instruction_set_ = instruction_set;
1021  if ((instruction_set_ == kThumb2) || (instruction_set_ == kArm)) {
1022    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1023      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1024      callee_save_method_frame_infos_[i] = arm::ArmCalleeSaveMethodFrameInfo(type);
1025    }
1026  } else if (instruction_set_ == kMips) {
1027    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1028      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1029      callee_save_method_frame_infos_[i] = mips::MipsCalleeSaveMethodFrameInfo(type);
1030    }
1031  } else if (instruction_set_ == kX86) {
1032    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1033      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1034      callee_save_method_frame_infos_[i] = x86::X86CalleeSaveMethodFrameInfo(type);
1035    }
1036  } else if (instruction_set_ == kX86_64) {
1037    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1038      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1039      callee_save_method_frame_infos_[i] = x86_64::X86_64CalleeSaveMethodFrameInfo(type);
1040    }
1041  } else if (instruction_set_ == kArm64) {
1042    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1043      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1044      callee_save_method_frame_infos_[i] = arm64::Arm64CalleeSaveMethodFrameInfo(type);
1045    }
1046  } else {
1047    UNIMPLEMENTED(FATAL) << instruction_set_;
1048  }
1049}
1050
1051void Runtime::SetCalleeSaveMethod(mirror::ArtMethod* method, CalleeSaveType type) {
1052  DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastCalleeSaveType));
1053  callee_save_methods_[type] = method;
1054}
1055
1056const std::vector<const DexFile*>& Runtime::GetCompileTimeClassPath(jobject class_loader) {
1057  if (class_loader == NULL) {
1058    return GetClassLinker()->GetBootClassPath();
1059  }
1060  CHECK(UseCompileTimeClassPath());
1061  CompileTimeClassPaths::const_iterator it = compile_time_class_paths_.find(class_loader);
1062  CHECK(it != compile_time_class_paths_.end());
1063  return it->second;
1064}
1065
1066void Runtime::SetCompileTimeClassPath(jobject class_loader,
1067                                      std::vector<const DexFile*>& class_path) {
1068  CHECK(!IsStarted());
1069  use_compile_time_class_path_ = true;
1070  compile_time_class_paths_.Put(class_loader, class_path);
1071}
1072
1073void Runtime::AddMethodVerifier(verifier::MethodVerifier* verifier) {
1074  DCHECK(verifier != nullptr);
1075  MutexLock mu(Thread::Current(), method_verifier_lock_);
1076  method_verifiers_.insert(verifier);
1077}
1078
1079void Runtime::RemoveMethodVerifier(verifier::MethodVerifier* verifier) {
1080  DCHECK(verifier != nullptr);
1081  MutexLock mu(Thread::Current(), method_verifier_lock_);
1082  auto it = method_verifiers_.find(verifier);
1083  CHECK(it != method_verifiers_.end());
1084  method_verifiers_.erase(it);
1085}
1086
1087void Runtime::StartProfiler(const char* appDir, const char* procName) {
1088  BackgroundMethodSamplingProfiler::Start(profile_period_s_, profile_duration_s_, appDir,
1089      procName, profile_interval_us_, profile_backoff_coefficient_, profile_start_immediately_);
1090}
1091
1092// Transaction support.
1093void Runtime::EnterTransactionMode(Transaction* transaction) {
1094  DCHECK(IsCompiler());
1095  DCHECK(transaction != nullptr);
1096  DCHECK(!IsActiveTransaction());
1097  preinitialization_transaction_ = transaction;
1098}
1099
1100void Runtime::ExitTransactionMode() {
1101  DCHECK(IsCompiler());
1102  DCHECK(IsActiveTransaction());
1103  preinitialization_transaction_ = nullptr;
1104}
1105
1106void Runtime::RecordWriteField32(mirror::Object* obj, MemberOffset field_offset,
1107                                 uint32_t value, bool is_volatile) const {
1108  DCHECK(IsCompiler());
1109  DCHECK(IsActiveTransaction());
1110  preinitialization_transaction_->RecordWriteField32(obj, field_offset, value, is_volatile);
1111}
1112
1113void Runtime::RecordWriteField64(mirror::Object* obj, MemberOffset field_offset,
1114                                 uint64_t value, bool is_volatile) const {
1115  DCHECK(IsCompiler());
1116  DCHECK(IsActiveTransaction());
1117  preinitialization_transaction_->RecordWriteField64(obj, field_offset, value, is_volatile);
1118}
1119
1120void Runtime::RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset,
1121                                        mirror::Object* value, bool is_volatile) const {
1122  DCHECK(IsCompiler());
1123  DCHECK(IsActiveTransaction());
1124  preinitialization_transaction_->RecordWriteFieldReference(obj, field_offset, value, is_volatile);
1125}
1126
1127void Runtime::RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const {
1128  DCHECK(IsCompiler());
1129  DCHECK(IsActiveTransaction());
1130  preinitialization_transaction_->RecordWriteArray(array, index, value);
1131}
1132
1133void Runtime::RecordStrongStringInsertion(mirror::String* s, uint32_t hash_code) const {
1134  DCHECK(IsCompiler());
1135  DCHECK(IsActiveTransaction());
1136  preinitialization_transaction_->RecordStrongStringInsertion(s, hash_code);
1137}
1138
1139void Runtime::RecordWeakStringInsertion(mirror::String* s, uint32_t hash_code) const {
1140  DCHECK(IsCompiler());
1141  DCHECK(IsActiveTransaction());
1142  preinitialization_transaction_->RecordWeakStringInsertion(s, hash_code);
1143}
1144
1145void Runtime::RecordStrongStringRemoval(mirror::String* s, uint32_t hash_code) const {
1146  DCHECK(IsCompiler());
1147  DCHECK(IsActiveTransaction());
1148  preinitialization_transaction_->RecordStrongStringRemoval(s, hash_code);
1149}
1150
1151void Runtime::RecordWeakStringRemoval(mirror::String* s, uint32_t hash_code) const {
1152  DCHECK(IsCompiler());
1153  DCHECK(IsActiveTransaction());
1154  preinitialization_transaction_->RecordWeakStringRemoval(s, hash_code);
1155}
1156
1157void Runtime::SetFaultMessage(const std::string& message) {
1158  MutexLock mu(Thread::Current(), fault_message_lock_);
1159  fault_message_ = message;
1160}
1161
1162void Runtime::AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* argv)
1163    const {
1164  if (GetInstrumentation()->InterpretOnly()) {
1165    argv->push_back("--compiler-filter=interpret-only");
1166  }
1167
1168  argv->push_back("--runtime-arg");
1169  std::string checkstr = "-implicit-checks";
1170
1171  int nchecks = 0;
1172  char checksep = ':';
1173
1174  if (!ExplicitNullChecks()) {
1175    checkstr += checksep;
1176    checksep = ',';
1177    checkstr += "null";
1178    ++nchecks;
1179  }
1180  if (!ExplicitSuspendChecks()) {
1181    checkstr += checksep;
1182    checksep = ',';
1183    checkstr += "suspend";
1184    ++nchecks;
1185  }
1186
1187  if (!ExplicitStackOverflowChecks()) {
1188    checkstr += checksep;
1189    checksep = ',';
1190    checkstr += "stack";
1191    ++nchecks;
1192  }
1193
1194  if (nchecks == 0) {
1195    checkstr += ":none";
1196  }
1197  argv->push_back(checkstr);
1198
1199  // Make the dex2oat instruction set match that of the launching runtime. If we have multiple
1200  // architecture support, dex2oat may be compiled as a different instruction-set than that
1201  // currently being executed.
1202#if defined(__arm__)
1203  argv->push_back("--instruction-set=arm");
1204#elif defined(__aarch64__)
1205  argv->push_back("--instruction-set=arm64");
1206#elif defined(__i386__)
1207  argv->push_back("--instruction-set=x86");
1208#elif defined(__x86_64__)
1209  argv->push_back("--instruction-set=x86_64");
1210#elif defined(__mips__)
1211  argv->push_back("--instruction-set=mips");
1212#endif
1213
1214  std::string features("--instruction-set-features=");
1215  features += GetDefaultInstructionSetFeatures();
1216  argv->push_back(features);
1217}
1218
1219void Runtime::UpdateProfilerState(int state) {
1220  VLOG(profiler) << "Profiler state updated to " << state;
1221}
1222}  // namespace art
1223