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#define ATRACE_TAG ATRACE_TAG_DALVIK
26#include <cutils/trace.h>
27#include <signal.h>
28#include <sys/syscall.h>
29#include <valgrind.h>
30
31#include <cstdio>
32#include <cstdlib>
33#include <limits>
34#include <memory_representation.h>
35#include <vector>
36#include <fcntl.h>
37
38#include "JniConstants.h"
39#include "ScopedLocalRef.h"
40#include "arch/arm/quick_method_frame_info_arm.h"
41#include "arch/arm/registers_arm.h"
42#include "arch/arm64/quick_method_frame_info_arm64.h"
43#include "arch/arm64/registers_arm64.h"
44#include "arch/instruction_set_features.h"
45#include "arch/mips/quick_method_frame_info_mips.h"
46#include "arch/mips/registers_mips.h"
47#include "arch/mips64/quick_method_frame_info_mips64.h"
48#include "arch/mips64/registers_mips64.h"
49#include "arch/x86/quick_method_frame_info_x86.h"
50#include "arch/x86/registers_x86.h"
51#include "arch/x86_64/quick_method_frame_info_x86_64.h"
52#include "arch/x86_64/registers_x86_64.h"
53#include "art_field-inl.h"
54#include "art_method-inl.h"
55#include "asm_support.h"
56#include "atomic.h"
57#include "base/arena_allocator.h"
58#include "base/dumpable.h"
59#include "base/unix_file/fd_file.h"
60#include "class_linker-inl.h"
61#include "compiler_callbacks.h"
62#include "debugger.h"
63#include "elf_file.h"
64#include "entrypoints/runtime_asm_entrypoints.h"
65#include "fault_handler.h"
66#include "gc/accounting/card_table-inl.h"
67#include "gc/heap.h"
68#include "gc/space/image_space.h"
69#include "gc/space/space-inl.h"
70#include "handle_scope-inl.h"
71#include "image.h"
72#include "instrumentation.h"
73#include "intern_table.h"
74#include "interpreter/interpreter.h"
75#include "jit/jit.h"
76#include "jni_internal.h"
77#include "linear_alloc.h"
78#include "mirror/array.h"
79#include "mirror/class-inl.h"
80#include "mirror/class_loader.h"
81#include "mirror/field.h"
82#include "mirror/method.h"
83#include "mirror/stack_trace_element.h"
84#include "mirror/throwable.h"
85#include "monitor.h"
86#include "native/dalvik_system_DexFile.h"
87#include "native/dalvik_system_VMDebug.h"
88#include "native/dalvik_system_VMRuntime.h"
89#include "native/dalvik_system_VMStack.h"
90#include "native/dalvik_system_ZygoteHooks.h"
91#include "native/java_lang_Class.h"
92#include "native/java_lang_DexCache.h"
93#include "native/java_lang_Object.h"
94#include "native/java_lang_Runtime.h"
95#include "native/java_lang_String.h"
96#include "native/java_lang_StringFactory.h"
97#include "native/java_lang_System.h"
98#include "native/java_lang_Thread.h"
99#include "native/java_lang_Throwable.h"
100#include "native/java_lang_VMClassLoader.h"
101#include "native/java_lang_ref_FinalizerReference.h"
102#include "native/java_lang_ref_Reference.h"
103#include "native/java_lang_reflect_Array.h"
104#include "native/java_lang_reflect_Constructor.h"
105#include "native/java_lang_reflect_Field.h"
106#include "native/java_lang_reflect_Method.h"
107#include "native/java_lang_reflect_Proxy.h"
108#include "native/java_util_concurrent_atomic_AtomicLong.h"
109#include "native/libcore_util_CharsetUtils.h"
110#include "native/org_apache_harmony_dalvik_ddmc_DdmServer.h"
111#include "native/org_apache_harmony_dalvik_ddmc_DdmVmInternal.h"
112#include "native/sun_misc_Unsafe.h"
113#include "native_bridge_art_interface.h"
114#include "oat_file.h"
115#include "os.h"
116#include "parsed_options.h"
117#include "profiler.h"
118#include "quick/quick_method_frame_info.h"
119#include "reflection.h"
120#include "runtime_options.h"
121#include "ScopedLocalRef.h"
122#include "scoped_thread_state_change.h"
123#include "sigchain.h"
124#include "signal_catcher.h"
125#include "signal_set.h"
126#include "thread.h"
127#include "thread_list.h"
128#include "trace.h"
129#include "transaction.h"
130#include "verifier/method_verifier.h"
131#include "well_known_classes.h"
132
133namespace art {
134
135// If a signal isn't handled properly, enable a handler that attempts to dump the Java stack.
136static constexpr bool kEnableJavaStackTraceHandler = false;
137Runtime* Runtime::instance_ = nullptr;
138
139struct TraceConfig {
140  Trace::TraceMode trace_mode;
141  Trace::TraceOutputMode trace_output_mode;
142  std::string trace_file;
143  size_t trace_file_size;
144};
145
146Runtime::Runtime()
147    : resolution_method_(nullptr),
148      imt_conflict_method_(nullptr),
149      imt_unimplemented_method_(nullptr),
150      instruction_set_(kNone),
151      compiler_callbacks_(nullptr),
152      is_zygote_(false),
153      must_relocate_(false),
154      is_concurrent_gc_enabled_(true),
155      is_explicit_gc_disabled_(false),
156      dex2oat_enabled_(true),
157      image_dex2oat_enabled_(true),
158      default_stack_size_(0),
159      heap_(nullptr),
160      max_spins_before_thin_lock_inflation_(Monitor::kDefaultMaxSpinsBeforeThinLockInflation),
161      monitor_list_(nullptr),
162      monitor_pool_(nullptr),
163      thread_list_(nullptr),
164      intern_table_(nullptr),
165      class_linker_(nullptr),
166      signal_catcher_(nullptr),
167      java_vm_(nullptr),
168      fault_message_lock_("Fault message lock"),
169      fault_message_(""),
170      threads_being_born_(0),
171      shutdown_cond_(new ConditionVariable("Runtime shutdown", *Locks::runtime_shutdown_lock_)),
172      shutting_down_(false),
173      shutting_down_started_(false),
174      started_(false),
175      finished_starting_(false),
176      vfprintf_(nullptr),
177      exit_(nullptr),
178      abort_(nullptr),
179      stats_enabled_(false),
180      running_on_valgrind_(RUNNING_ON_VALGRIND > 0),
181      profiler_started_(false),
182      instrumentation_(),
183      main_thread_group_(nullptr),
184      system_thread_group_(nullptr),
185      system_class_loader_(nullptr),
186      dump_gc_performance_on_shutdown_(false),
187      preinitialization_transaction_(nullptr),
188      verify_(false),
189      allow_dex_file_fallback_(true),
190      target_sdk_version_(0),
191      implicit_null_checks_(false),
192      implicit_so_checks_(false),
193      implicit_suspend_checks_(false),
194      is_native_bridge_loaded_(false),
195      zygote_max_failed_boots_(0) {
196  CheckAsmSupportOffsetsAndSizes();
197  std::fill(callee_save_methods_, callee_save_methods_ + arraysize(callee_save_methods_), 0u);
198}
199
200Runtime::~Runtime() {
201  if (is_native_bridge_loaded_) {
202    UnloadNativeBridge();
203  }
204  if (dump_gc_performance_on_shutdown_) {
205    // This can't be called from the Heap destructor below because it
206    // could call RosAlloc::InspectAll() which needs the thread_list
207    // to be still alive.
208    heap_->DumpGcPerformanceInfo(LOG(INFO));
209  }
210
211  Thread* self = Thread::Current();
212  const bool attach_shutdown_thread = self == nullptr;
213  if (attach_shutdown_thread) {
214    CHECK(AttachCurrentThread("Shutdown thread", false, nullptr, false));
215    self = Thread::Current();
216  } else {
217    LOG(WARNING) << "Current thread not detached in Runtime shutdown";
218  }
219
220  {
221    MutexLock mu(self, *Locks::runtime_shutdown_lock_);
222    shutting_down_started_ = true;
223    while (threads_being_born_ > 0) {
224      shutdown_cond_->Wait(self);
225    }
226    shutting_down_ = true;
227  }
228  // Shutdown and wait for the daemons.
229  CHECK(self != nullptr);
230  if (IsFinishedStarting()) {
231    self->ClearException();
232    self->GetJniEnv()->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons,
233                                            WellKnownClasses::java_lang_Daemons_stop);
234  }
235  if (attach_shutdown_thread) {
236    DetachCurrentThread();
237    self = nullptr;
238  }
239
240  // Shut down background profiler before the runtime exits.
241  if (profiler_started_) {
242    BackgroundMethodSamplingProfiler::Shutdown();
243  }
244
245  Trace::Shutdown();
246
247  // Make sure to let the GC complete if it is running.
248  heap_->WaitForGcToComplete(gc::kGcCauseBackground, self);
249  heap_->DeleteThreadPool();
250  if (jit_.get() != nullptr) {
251    VLOG(jit) << "Deleting jit thread pool";
252    // Delete thread pool before the thread list since we don't want to wait forever on the
253    // JIT compiler threads.
254    jit_->DeleteThreadPool();
255  }
256
257  // Make sure our internal threads are dead before we start tearing down things they're using.
258  Dbg::StopJdwp();
259  delete signal_catcher_;
260
261  // Make sure all other non-daemon threads have terminated, and all daemon threads are suspended.
262  delete thread_list_;
263
264  // Delete the JIT after thread list to ensure that there is no remaining threads which could be
265  // accessing the instrumentation when we delete it.
266  if (jit_.get() != nullptr) {
267    VLOG(jit) << "Deleting jit";
268    jit_.reset(nullptr);
269  }
270  linear_alloc_.reset();
271  arena_pool_.reset();
272  low_4gb_arena_pool_.reset();
273
274  // Shutdown the fault manager if it was initialized.
275  fault_manager.Shutdown();
276
277  delete monitor_list_;
278  delete monitor_pool_;
279  delete class_linker_;
280  delete heap_;
281  delete intern_table_;
282  delete java_vm_;
283  Thread::Shutdown();
284  QuasiAtomic::Shutdown();
285  verifier::MethodVerifier::Shutdown();
286  MemMap::Shutdown();
287  // TODO: acquire a static mutex on Runtime to avoid racing.
288  CHECK(instance_ == nullptr || instance_ == this);
289  instance_ = nullptr;
290}
291
292struct AbortState {
293  void Dump(std::ostream& os) const {
294    if (gAborting > 1) {
295      os << "Runtime aborting --- recursively, so no thread-specific detail!\n";
296      return;
297    }
298    gAborting++;
299    os << "Runtime aborting...\n";
300    if (Runtime::Current() == nullptr) {
301      os << "(Runtime does not yet exist!)\n";
302      return;
303    }
304    Thread* self = Thread::Current();
305    if (self == nullptr) {
306      os << "(Aborting thread was not attached to runtime!)\n";
307      DumpKernelStack(os, GetTid(), "  kernel: ", false);
308      DumpNativeStack(os, GetTid(), "  native: ", nullptr);
309    } else {
310      os << "Aborting thread:\n";
311      if (Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)) {
312        DumpThread(os, self);
313      } else {
314        if (Locks::mutator_lock_->SharedTryLock(self)) {
315          DumpThread(os, self);
316          Locks::mutator_lock_->SharedUnlock(self);
317        }
318      }
319    }
320    DumpAllThreads(os, self);
321  }
322
323  // No thread-safety analysis as we do explicitly test for holding the mutator lock.
324  void DumpThread(std::ostream& os, Thread* self) const NO_THREAD_SAFETY_ANALYSIS {
325    DCHECK(Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self));
326    self->Dump(os);
327    if (self->IsExceptionPending()) {
328      mirror::Throwable* exception = self->GetException();
329      os << "Pending exception " << exception->Dump();
330    }
331  }
332
333  void DumpAllThreads(std::ostream& os, Thread* self) const {
334    Runtime* runtime = Runtime::Current();
335    if (runtime != nullptr) {
336      ThreadList* thread_list = runtime->GetThreadList();
337      if (thread_list != nullptr) {
338        bool tll_already_held = Locks::thread_list_lock_->IsExclusiveHeld(self);
339        bool ml_already_held = Locks::mutator_lock_->IsSharedHeld(self);
340        if (!tll_already_held || !ml_already_held) {
341          os << "Dumping all threads without appropriate locks held:"
342              << (!tll_already_held ? " thread list lock" : "")
343              << (!ml_already_held ? " mutator lock" : "")
344              << "\n";
345        }
346        os << "All threads:\n";
347        thread_list->Dump(os);
348      }
349    }
350  }
351};
352
353void Runtime::Abort() {
354  gAborting++;  // set before taking any locks
355
356  // Ensure that we don't have multiple threads trying to abort at once,
357  // which would result in significantly worse diagnostics.
358  MutexLock mu(Thread::Current(), *Locks::abort_lock_);
359
360  // Get any pending output out of the way.
361  fflush(nullptr);
362
363  // Many people have difficulty distinguish aborts from crashes,
364  // so be explicit.
365  AbortState state;
366  LOG(INTERNAL_FATAL) << Dumpable<AbortState>(state);
367
368  // Call the abort hook if we have one.
369  if (Runtime::Current() != nullptr && Runtime::Current()->abort_ != nullptr) {
370    LOG(INTERNAL_FATAL) << "Calling abort hook...";
371    Runtime::Current()->abort_();
372    // notreached
373    LOG(INTERNAL_FATAL) << "Unexpectedly returned from abort hook!";
374  }
375
376#if defined(__GLIBC__)
377  // TODO: we ought to be able to use pthread_kill(3) here (or abort(3),
378  // which POSIX defines in terms of raise(3), which POSIX defines in terms
379  // of pthread_kill(3)). On Linux, though, libcorkscrew can't unwind through
380  // libpthread, which means the stacks we dump would be useless. Calling
381  // tgkill(2) directly avoids that.
382  syscall(__NR_tgkill, getpid(), GetTid(), SIGABRT);
383  // TODO: LLVM installs it's own SIGABRT handler so exit to be safe... Can we disable that in LLVM?
384  // If not, we could use sigaction(3) before calling tgkill(2) and lose this call to exit(3).
385  exit(1);
386#else
387  abort();
388#endif
389  // notreached
390}
391
392void Runtime::PreZygoteFork() {
393  heap_->PreZygoteFork();
394}
395
396void Runtime::CallExitHook(jint status) {
397  if (exit_ != nullptr) {
398    ScopedThreadStateChange tsc(Thread::Current(), kNative);
399    exit_(status);
400    LOG(WARNING) << "Exit hook returned instead of exiting!";
401  }
402}
403
404void Runtime::SweepSystemWeaks(IsMarkedCallback* visitor, void* arg) {
405  GetInternTable()->SweepInternTableWeaks(visitor, arg);
406  GetMonitorList()->SweepMonitorList(visitor, arg);
407  GetJavaVM()->SweepJniWeakGlobals(visitor, arg);
408}
409
410bool Runtime::Create(const RuntimeOptions& options, bool ignore_unrecognized) {
411  // TODO: acquire a static mutex on Runtime to avoid racing.
412  if (Runtime::instance_ != nullptr) {
413    return false;
414  }
415  InitLogging(nullptr);  // Calls Locks::Init() as a side effect.
416  instance_ = new Runtime;
417  if (!instance_->Init(options, ignore_unrecognized)) {
418    // TODO: Currently deleting the instance will abort the runtime on destruction. Now This will
419    // leak memory, instead. Fix the destructor. b/19100793.
420    // delete instance_;
421    instance_ = nullptr;
422    return false;
423  }
424  return true;
425}
426
427static jobject CreateSystemClassLoader(Runtime* runtime) {
428  if (runtime->IsAotCompiler() && !runtime->GetCompilerCallbacks()->IsBootImage()) {
429    return nullptr;
430  }
431
432  ScopedObjectAccess soa(Thread::Current());
433  ClassLinker* cl = Runtime::Current()->GetClassLinker();
434  auto pointer_size = cl->GetImagePointerSize();
435
436  StackHandleScope<2> hs(soa.Self());
437  Handle<mirror::Class> class_loader_class(
438      hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_ClassLoader)));
439  CHECK(cl->EnsureInitialized(soa.Self(), class_loader_class, true, true));
440
441  ArtMethod* getSystemClassLoader = class_loader_class->FindDirectMethod(
442      "getSystemClassLoader", "()Ljava/lang/ClassLoader;", pointer_size);
443  CHECK(getSystemClassLoader != nullptr);
444
445  JValue result = InvokeWithJValues(soa, nullptr, soa.EncodeMethod(getSystemClassLoader), nullptr);
446  JNIEnv* env = soa.Self()->GetJniEnv();
447  ScopedLocalRef<jobject> system_class_loader(env, soa.AddLocalReference<jobject>(result.GetL()));
448  CHECK(system_class_loader.get() != nullptr);
449
450  soa.Self()->SetClassLoaderOverride(system_class_loader.get());
451
452  Handle<mirror::Class> thread_class(
453      hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_Thread)));
454  CHECK(cl->EnsureInitialized(soa.Self(), thread_class, true, true));
455
456  ArtField* contextClassLoader =
457      thread_class->FindDeclaredInstanceField("contextClassLoader", "Ljava/lang/ClassLoader;");
458  CHECK(contextClassLoader != nullptr);
459
460  // We can't run in a transaction yet.
461  contextClassLoader->SetObject<false>(soa.Self()->GetPeer(),
462                                       soa.Decode<mirror::ClassLoader*>(system_class_loader.get()));
463
464  return env->NewGlobalRef(system_class_loader.get());
465}
466
467std::string Runtime::GetPatchoatExecutable() const {
468  if (!patchoat_executable_.empty()) {
469    return patchoat_executable_;
470  }
471  std::string patchoat_executable(GetAndroidRoot());
472  patchoat_executable += (kIsDebugBuild ? "/bin/patchoatd" : "/bin/patchoat");
473  return patchoat_executable;
474}
475
476std::string Runtime::GetCompilerExecutable() const {
477  if (!compiler_executable_.empty()) {
478    return compiler_executable_;
479  }
480  std::string compiler_executable(GetAndroidRoot());
481  compiler_executable += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat");
482  return compiler_executable;
483}
484
485bool Runtime::Start() {
486  VLOG(startup) << "Runtime::Start entering";
487
488  // Restore main thread state to kNative as expected by native code.
489  Thread* self = Thread::Current();
490
491  self->TransitionFromRunnableToSuspended(kNative);
492
493  started_ = true;
494
495  // Use !IsAotCompiler so that we get test coverage, tests are never the zygote.
496  if (!IsAotCompiler()) {
497    ScopedObjectAccess soa(self);
498    gc::space::ImageSpace* image_space = heap_->GetImageSpace();
499    if (image_space != nullptr) {
500      ATRACE_BEGIN("AddImageStringsToTable");
501      GetInternTable()->AddImageStringsToTable(image_space);
502      ATRACE_END();
503      ATRACE_BEGIN("MoveImageClassesToClassTable");
504      GetClassLinker()->MoveImageClassesToClassTable();
505      ATRACE_END();
506    }
507  }
508
509  // If we are the zygote then we need to wait until after forking to create the code cache
510  // due to SELinux restrictions on r/w/x memory regions.
511  if (!IsZygote() && jit_options_->UseJIT()) {
512    CreateJit();
513  }
514
515  if (!IsImageDex2OatEnabled() || !GetHeap()->HasImageSpace()) {
516    ScopedObjectAccess soa(self);
517    StackHandleScope<1> hs(soa.Self());
518    auto klass(hs.NewHandle<mirror::Class>(mirror::Class::GetJavaLangClass()));
519    class_linker_->EnsureInitialized(soa.Self(), klass, true, true);
520  }
521
522  // InitNativeMethods needs to be after started_ so that the classes
523  // it touches will have methods linked to the oat file if necessary.
524  ATRACE_BEGIN("InitNativeMethods");
525  InitNativeMethods();
526  ATRACE_END();
527
528  // Initialize well known thread group values that may be accessed threads while attaching.
529  InitThreadGroups(self);
530
531  Thread::FinishStartup();
532
533  system_class_loader_ = CreateSystemClassLoader(this);
534
535  if (is_zygote_) {
536    if (!InitZygote()) {
537      return false;
538    }
539  } else {
540    if (is_native_bridge_loaded_) {
541      PreInitializeNativeBridge(".");
542    }
543    DidForkFromZygote(self->GetJniEnv(), NativeBridgeAction::kInitialize,
544                      GetInstructionSetString(kRuntimeISA));
545  }
546
547  ATRACE_BEGIN("StartDaemonThreads");
548  StartDaemonThreads();
549  ATRACE_END();
550
551  {
552    ScopedObjectAccess soa(self);
553    self->GetJniEnv()->locals.AssertEmpty();
554  }
555
556  VLOG(startup) << "Runtime::Start exiting";
557  finished_starting_ = true;
558
559  if (profiler_options_.IsEnabled() && !profile_output_filename_.empty()) {
560    // User has asked for a profile using -Xenable-profiler.
561    // Create the profile file if it doesn't exist.
562    int fd = open(profile_output_filename_.c_str(), O_RDWR|O_CREAT|O_EXCL, 0660);
563    if (fd >= 0) {
564      close(fd);
565    } else if (errno != EEXIST) {
566      LOG(INFO) << "Failed to access the profile file. Profiler disabled.";
567      return true;
568    }
569    StartProfiler(profile_output_filename_.c_str());
570  }
571
572  if (trace_config_.get() != nullptr && trace_config_->trace_file != "") {
573    ScopedThreadStateChange tsc(self, kWaitingForMethodTracingStart);
574    Trace::Start(trace_config_->trace_file.c_str(),
575                 -1,
576                 static_cast<int>(trace_config_->trace_file_size),
577                 0,
578                 trace_config_->trace_output_mode,
579                 trace_config_->trace_mode,
580                 0);
581  }
582
583  return true;
584}
585
586void Runtime::EndThreadBirth() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) {
587  DCHECK_GT(threads_being_born_, 0U);
588  threads_being_born_--;
589  if (shutting_down_started_ && threads_being_born_ == 0) {
590    shutdown_cond_->Broadcast(Thread::Current());
591  }
592}
593
594// Do zygote-mode-only initialization.
595bool Runtime::InitZygote() {
596#ifdef __linux__
597  // zygote goes into its own process group
598  setpgid(0, 0);
599
600  // See storage config details at http://source.android.com/tech/storage/
601  // Create private mount namespace shared by all children
602  if (unshare(CLONE_NEWNS) == -1) {
603    PLOG(WARNING) << "Failed to unshare()";
604    return false;
605  }
606
607  // Mark rootfs as being a slave so that changes from default
608  // namespace only flow into our children.
609  if (mount("rootfs", "/", nullptr, (MS_SLAVE | MS_REC), nullptr) == -1) {
610    PLOG(WARNING) << "Failed to mount() rootfs as MS_SLAVE";
611    return false;
612  }
613
614  // Create a staging tmpfs that is shared by our children; they will
615  // bind mount storage into their respective private namespaces, which
616  // are isolated from each other.
617  const char* target_base = getenv("EMULATED_STORAGE_TARGET");
618  if (target_base != nullptr) {
619    if (mount("tmpfs", target_base, "tmpfs", MS_NOSUID | MS_NODEV,
620              "uid=0,gid=1028,mode=0751") == -1) {
621      LOG(WARNING) << "Failed to mount tmpfs to " << target_base;
622      return false;
623    }
624  }
625
626  return true;
627#else
628  UNIMPLEMENTED(FATAL);
629  return false;
630#endif
631}
632
633void Runtime::DidForkFromZygote(JNIEnv* env, NativeBridgeAction action, const char* isa) {
634  is_zygote_ = false;
635
636  if (is_native_bridge_loaded_) {
637    switch (action) {
638      case NativeBridgeAction::kUnload:
639        UnloadNativeBridge();
640        is_native_bridge_loaded_ = false;
641        break;
642
643      case NativeBridgeAction::kInitialize:
644        InitializeNativeBridge(env, isa);
645        break;
646    }
647  }
648
649  // Create the thread pools.
650  heap_->CreateThreadPool();
651  // Reset the gc performance data at zygote fork so that the GCs
652  // before fork aren't attributed to an app.
653  heap_->ResetGcPerformanceInfo();
654
655  if (jit_.get() == nullptr && jit_options_->UseJIT()) {
656    // Create the JIT if the flag is set and we haven't already create it (happens for run-tests).
657    CreateJit();
658  }
659
660  StartSignalCatcher();
661
662  // Start the JDWP thread. If the command-line debugger flags specified "suspend=y",
663  // this will pause the runtime, so we probably want this to come last.
664  Dbg::StartJdwp();
665}
666
667void Runtime::StartSignalCatcher() {
668  if (!is_zygote_) {
669    signal_catcher_ = new SignalCatcher(stack_trace_file_);
670  }
671}
672
673bool Runtime::IsShuttingDown(Thread* self) {
674  MutexLock mu(self, *Locks::runtime_shutdown_lock_);
675  return IsShuttingDownLocked();
676}
677
678void Runtime::StartDaemonThreads() {
679  VLOG(startup) << "Runtime::StartDaemonThreads entering";
680
681  Thread* self = Thread::Current();
682
683  // Must be in the kNative state for calling native methods.
684  CHECK_EQ(self->GetState(), kNative);
685
686  JNIEnv* env = self->GetJniEnv();
687  env->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons,
688                            WellKnownClasses::java_lang_Daemons_start);
689  if (env->ExceptionCheck()) {
690    env->ExceptionDescribe();
691    LOG(FATAL) << "Error starting java.lang.Daemons";
692  }
693
694  VLOG(startup) << "Runtime::StartDaemonThreads exiting";
695}
696
697static bool OpenDexFilesFromImage(const std::string& image_location,
698                                  std::vector<std::unique_ptr<const DexFile>>* dex_files,
699                                  size_t* failures) {
700  DCHECK(dex_files != nullptr) << "OpenDexFilesFromImage: out-param is nullptr";
701  std::string system_filename;
702  bool has_system = false;
703  std::string cache_filename_unused;
704  bool dalvik_cache_exists_unused;
705  bool has_cache_unused;
706  bool is_global_cache_unused;
707  bool found_image = gc::space::ImageSpace::FindImageFilename(image_location.c_str(),
708                                                              kRuntimeISA,
709                                                              &system_filename,
710                                                              &has_system,
711                                                              &cache_filename_unused,
712                                                              &dalvik_cache_exists_unused,
713                                                              &has_cache_unused,
714                                                              &is_global_cache_unused);
715  *failures = 0;
716  if (!found_image || !has_system) {
717    return false;
718  }
719  std::string error_msg;
720  // We are falling back to non-executable use of the oat file because patching failed, presumably
721  // due to lack of space.
722  std::string oat_filename = ImageHeader::GetOatLocationFromImageLocation(system_filename.c_str());
723  std::string oat_location = ImageHeader::GetOatLocationFromImageLocation(image_location.c_str());
724  std::unique_ptr<File> file(OS::OpenFileForReading(oat_filename.c_str()));
725  if (file.get() == nullptr) {
726    return false;
727  }
728  std::unique_ptr<ElfFile> elf_file(ElfFile::Open(file.release(), false, false, &error_msg));
729  if (elf_file.get() == nullptr) {
730    return false;
731  }
732  std::unique_ptr<OatFile> oat_file(OatFile::OpenWithElfFile(elf_file.release(), oat_location,
733                                                             nullptr, &error_msg));
734  if (oat_file.get() == nullptr) {
735    LOG(INFO) << "Unable to use '" << oat_filename << "' because " << error_msg;
736    return false;
737  }
738
739  for (const OatFile::OatDexFile* oat_dex_file : oat_file->GetOatDexFiles()) {
740    if (oat_dex_file == nullptr) {
741      *failures += 1;
742      continue;
743    }
744    std::unique_ptr<const DexFile> dex_file = oat_dex_file->OpenDexFile(&error_msg);
745    if (dex_file.get() == nullptr) {
746      *failures += 1;
747    } else {
748      dex_files->push_back(std::move(dex_file));
749    }
750  }
751  Runtime::Current()->GetClassLinker()->RegisterOatFile(oat_file.release());
752  return true;
753}
754
755
756static size_t OpenDexFiles(const std::vector<std::string>& dex_filenames,
757                           const std::vector<std::string>& dex_locations,
758                           const std::string& image_location,
759                           std::vector<std::unique_ptr<const DexFile>>* dex_files) {
760  DCHECK(dex_files != nullptr) << "OpenDexFiles: out-param is nullptr";
761  size_t failure_count = 0;
762  if (!image_location.empty() && OpenDexFilesFromImage(image_location, dex_files, &failure_count)) {
763    return failure_count;
764  }
765  failure_count = 0;
766  for (size_t i = 0; i < dex_filenames.size(); i++) {
767    const char* dex_filename = dex_filenames[i].c_str();
768    const char* dex_location = dex_locations[i].c_str();
769    std::string error_msg;
770    if (!OS::FileExists(dex_filename)) {
771      LOG(WARNING) << "Skipping non-existent dex file '" << dex_filename << "'";
772      continue;
773    }
774    if (!DexFile::Open(dex_filename, dex_location, &error_msg, dex_files)) {
775      LOG(WARNING) << "Failed to open .dex from file '" << dex_filename << "': " << error_msg;
776      ++failure_count;
777    }
778  }
779  return failure_count;
780}
781
782bool Runtime::Init(const RuntimeOptions& raw_options, bool ignore_unrecognized) {
783  ATRACE_BEGIN("Runtime::Init");
784  CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize);
785
786  MemMap::Init();
787
788  using Opt = RuntimeArgumentMap;
789  RuntimeArgumentMap runtime_options;
790  std::unique_ptr<ParsedOptions> parsed_options(
791      ParsedOptions::Create(raw_options, ignore_unrecognized, &runtime_options));
792  if (parsed_options.get() == nullptr) {
793    LOG(ERROR) << "Failed to parse options";
794    ATRACE_END();
795    return false;
796  }
797  VLOG(startup) << "Runtime::Init -verbose:startup enabled";
798
799  QuasiAtomic::Startup();
800
801  Monitor::Init(runtime_options.GetOrDefault(Opt::LockProfThreshold),
802                runtime_options.GetOrDefault(Opt::HookIsSensitiveThread));
803
804  boot_class_path_string_ = runtime_options.ReleaseOrDefault(Opt::BootClassPath);
805  class_path_string_ = runtime_options.ReleaseOrDefault(Opt::ClassPath);
806  properties_ = runtime_options.ReleaseOrDefault(Opt::PropertiesList);
807
808  compiler_callbacks_ = runtime_options.GetOrDefault(Opt::CompilerCallbacksPtr);
809  patchoat_executable_ = runtime_options.ReleaseOrDefault(Opt::PatchOat);
810  must_relocate_ = runtime_options.GetOrDefault(Opt::Relocate);
811  is_zygote_ = runtime_options.Exists(Opt::Zygote);
812  is_explicit_gc_disabled_ = runtime_options.Exists(Opt::DisableExplicitGC);
813  dex2oat_enabled_ = runtime_options.GetOrDefault(Opt::Dex2Oat);
814  image_dex2oat_enabled_ = runtime_options.GetOrDefault(Opt::ImageDex2Oat);
815
816  vfprintf_ = runtime_options.GetOrDefault(Opt::HookVfprintf);
817  exit_ = runtime_options.GetOrDefault(Opt::HookExit);
818  abort_ = runtime_options.GetOrDefault(Opt::HookAbort);
819
820  default_stack_size_ = runtime_options.GetOrDefault(Opt::StackSize);
821  stack_trace_file_ = runtime_options.ReleaseOrDefault(Opt::StackTraceFile);
822
823  compiler_executable_ = runtime_options.ReleaseOrDefault(Opt::Compiler);
824  compiler_options_ = runtime_options.ReleaseOrDefault(Opt::CompilerOptions);
825  image_compiler_options_ = runtime_options.ReleaseOrDefault(Opt::ImageCompilerOptions);
826  image_location_ = runtime_options.GetOrDefault(Opt::Image);
827
828  max_spins_before_thin_lock_inflation_ =
829      runtime_options.GetOrDefault(Opt::MaxSpinsBeforeThinLockInflation);
830
831  monitor_list_ = new MonitorList;
832  monitor_pool_ = MonitorPool::Create();
833  thread_list_ = new ThreadList;
834  intern_table_ = new InternTable;
835
836  verify_ = runtime_options.GetOrDefault(Opt::Verify);
837  allow_dex_file_fallback_ = !runtime_options.Exists(Opt::NoDexFileFallback);
838
839  Split(runtime_options.GetOrDefault(Opt::CpuAbiList), ',', &cpu_abilist_);
840
841  fingerprint_ = runtime_options.ReleaseOrDefault(Opt::Fingerprint);
842
843  if (runtime_options.GetOrDefault(Opt::Interpret)) {
844    GetInstrumentation()->ForceInterpretOnly();
845  }
846
847  zygote_max_failed_boots_ = runtime_options.GetOrDefault(Opt::ZygoteMaxFailedBoots);
848
849  XGcOption xgc_option = runtime_options.GetOrDefault(Opt::GcOption);
850  ATRACE_BEGIN("CreateHeap");
851  heap_ = new gc::Heap(runtime_options.GetOrDefault(Opt::MemoryInitialSize),
852                       runtime_options.GetOrDefault(Opt::HeapGrowthLimit),
853                       runtime_options.GetOrDefault(Opt::HeapMinFree),
854                       runtime_options.GetOrDefault(Opt::HeapMaxFree),
855                       runtime_options.GetOrDefault(Opt::HeapTargetUtilization),
856                       runtime_options.GetOrDefault(Opt::ForegroundHeapGrowthMultiplier),
857                       runtime_options.GetOrDefault(Opt::MemoryMaximumSize),
858                       runtime_options.GetOrDefault(Opt::NonMovingSpaceCapacity),
859                       runtime_options.GetOrDefault(Opt::Image),
860                       runtime_options.GetOrDefault(Opt::ImageInstructionSet),
861                       xgc_option.collector_type_,
862                       runtime_options.GetOrDefault(Opt::BackgroundGc),
863                       runtime_options.GetOrDefault(Opt::LargeObjectSpace),
864                       runtime_options.GetOrDefault(Opt::LargeObjectThreshold),
865                       runtime_options.GetOrDefault(Opt::ParallelGCThreads),
866                       runtime_options.GetOrDefault(Opt::ConcGCThreads),
867                       runtime_options.Exists(Opt::LowMemoryMode),
868                       runtime_options.GetOrDefault(Opt::LongPauseLogThreshold),
869                       runtime_options.GetOrDefault(Opt::LongGCLogThreshold),
870                       runtime_options.Exists(Opt::IgnoreMaxFootprint),
871                       runtime_options.GetOrDefault(Opt::UseTLAB),
872                       xgc_option.verify_pre_gc_heap_,
873                       xgc_option.verify_pre_sweeping_heap_,
874                       xgc_option.verify_post_gc_heap_,
875                       xgc_option.verify_pre_gc_rosalloc_,
876                       xgc_option.verify_pre_sweeping_rosalloc_,
877                       xgc_option.verify_post_gc_rosalloc_,
878                       xgc_option.gcstress_,
879                       runtime_options.GetOrDefault(Opt::EnableHSpaceCompactForOOM),
880                       runtime_options.GetOrDefault(Opt::HSpaceCompactForOOMMinIntervalsMs));
881  ATRACE_END();
882
883  if (heap_->GetImageSpace() == nullptr && !allow_dex_file_fallback_) {
884    LOG(ERROR) << "Dex file fallback disabled, cannot continue without image.";
885    ATRACE_END();
886    return false;
887  }
888
889  dump_gc_performance_on_shutdown_ = runtime_options.Exists(Opt::DumpGCPerformanceOnShutdown);
890
891  if (runtime_options.Exists(Opt::JdwpOptions)) {
892    Dbg::ConfigureJdwp(runtime_options.GetOrDefault(Opt::JdwpOptions));
893  }
894
895  jit_options_.reset(jit::JitOptions::CreateFromRuntimeArguments(runtime_options));
896  if (IsAotCompiler()) {
897    // If we are already the compiler at this point, we must be dex2oat. Don't create the jit in
898    // this case.
899    // If runtime_options doesn't have UseJIT set to true then CreateFromRuntimeArguments returns
900    // null and we don't create the jit.
901    jit_options_->SetUseJIT(false);
902  }
903
904  // Use MemMap arena pool for jit, malloc otherwise. Malloc arenas are faster to allocate but
905  // can't be trimmed as easily.
906  const bool use_malloc = IsAotCompiler();
907  arena_pool_.reset(new ArenaPool(use_malloc, false));
908  if (IsCompiler() && Is64BitInstructionSet(kRuntimeISA)) {
909    // 4gb, no malloc. Explanation in header.
910    low_4gb_arena_pool_.reset(new ArenaPool(false, true));
911    linear_alloc_.reset(new LinearAlloc(low_4gb_arena_pool_.get()));
912  } else {
913    linear_alloc_.reset(new LinearAlloc(arena_pool_.get()));
914  }
915
916  BlockSignals();
917  InitPlatformSignalHandlers();
918
919  // Change the implicit checks flags based on runtime architecture.
920  switch (kRuntimeISA) {
921    case kArm:
922    case kThumb2:
923    case kX86:
924    case kArm64:
925    case kX86_64:
926    case kMips:
927    case kMips64:
928      implicit_null_checks_ = true;
929      // Installing stack protection does not play well with valgrind.
930      implicit_so_checks_ = (RUNNING_ON_VALGRIND == 0);
931      break;
932    default:
933      // Keep the defaults.
934      break;
935  }
936
937  // Always initialize the signal chain so that any calls to sigaction get
938  // correctly routed to the next in the chain regardless of whether we
939  // have claimed the signal or not.
940  InitializeSignalChain();
941
942  if (implicit_null_checks_ || implicit_so_checks_ || implicit_suspend_checks_) {
943    fault_manager.Init();
944
945    // These need to be in a specific order.  The null point check handler must be
946    // after the suspend check and stack overflow check handlers.
947    //
948    // Note: the instances attach themselves to the fault manager and are handled by it. The manager
949    //       will delete the instance on Shutdown().
950    if (implicit_suspend_checks_) {
951      new SuspensionHandler(&fault_manager);
952    }
953
954    if (implicit_so_checks_) {
955      new StackOverflowHandler(&fault_manager);
956    }
957
958    if (implicit_null_checks_) {
959      new NullPointerHandler(&fault_manager);
960    }
961
962    if (kEnableJavaStackTraceHandler) {
963      new JavaStackTraceHandler(&fault_manager);
964    }
965  }
966
967  java_vm_ = new JavaVMExt(this, runtime_options);
968
969  Thread::Startup();
970
971  // ClassLinker needs an attached thread, but we can't fully attach a thread without creating
972  // objects. We can't supply a thread group yet; it will be fixed later. Since we are the main
973  // thread, we do not get a java peer.
974  Thread* self = Thread::Attach("main", false, nullptr, false);
975  CHECK_EQ(self->GetThreadId(), ThreadList::kMainThreadId);
976  CHECK(self != nullptr);
977
978  // Set us to runnable so tools using a runtime can allocate and GC by default
979  self->TransitionFromSuspendedToRunnable();
980
981  // Now we're attached, we can take the heap locks and validate the heap.
982  GetHeap()->EnableObjectValidation();
983
984  CHECK_GE(GetHeap()->GetContinuousSpaces().size(), 1U);
985  class_linker_ = new ClassLinker(intern_table_);
986  if (GetHeap()->HasImageSpace()) {
987    ATRACE_BEGIN("InitFromImage");
988    class_linker_->InitFromImage();
989    ATRACE_END();
990    if (kIsDebugBuild) {
991      GetHeap()->GetImageSpace()->VerifyImageAllocations();
992    }
993    if (boot_class_path_string_.empty()) {
994      // The bootclasspath is not explicitly specified: construct it from the loaded dex files.
995      const std::vector<const DexFile*>& boot_class_path = GetClassLinker()->GetBootClassPath();
996      std::vector<std::string> dex_locations;
997      dex_locations.reserve(boot_class_path.size());
998      for (const DexFile* dex_file : boot_class_path) {
999        dex_locations.push_back(dex_file->GetLocation());
1000      }
1001      boot_class_path_string_ = Join(dex_locations, ':');
1002    }
1003  } else {
1004    std::vector<std::string> dex_filenames;
1005    Split(boot_class_path_string_, ':', &dex_filenames);
1006
1007    std::vector<std::string> dex_locations;
1008    if (!runtime_options.Exists(Opt::BootClassPathLocations)) {
1009      dex_locations = dex_filenames;
1010    } else {
1011      dex_locations = runtime_options.GetOrDefault(Opt::BootClassPathLocations);
1012      CHECK_EQ(dex_filenames.size(), dex_locations.size());
1013    }
1014
1015    std::vector<std::unique_ptr<const DexFile>> boot_class_path;
1016    OpenDexFiles(dex_filenames,
1017                 dex_locations,
1018                 runtime_options.GetOrDefault(Opt::Image),
1019                 &boot_class_path);
1020    instruction_set_ = runtime_options.GetOrDefault(Opt::ImageInstructionSet);
1021    class_linker_->InitWithoutImage(std::move(boot_class_path));
1022
1023    // TODO: Should we move the following to InitWithoutImage?
1024    SetInstructionSet(instruction_set_);
1025    for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
1026      Runtime::CalleeSaveType type = Runtime::CalleeSaveType(i);
1027      if (!HasCalleeSaveMethod(type)) {
1028        SetCalleeSaveMethod(CreateCalleeSaveMethod(), type);
1029      }
1030    }
1031  }
1032
1033  CHECK(class_linker_ != nullptr);
1034
1035  // Initialize the special sentinel_ value early.
1036  sentinel_ = GcRoot<mirror::Object>(class_linker_->AllocObject(self));
1037  CHECK(sentinel_.Read() != nullptr);
1038
1039  verifier::MethodVerifier::Init();
1040
1041  if (runtime_options.Exists(Opt::MethodTrace)) {
1042    trace_config_.reset(new TraceConfig());
1043    trace_config_->trace_file = runtime_options.ReleaseOrDefault(Opt::MethodTraceFile);
1044    trace_config_->trace_file_size = runtime_options.ReleaseOrDefault(Opt::MethodTraceFileSize);
1045    trace_config_->trace_mode = Trace::TraceMode::kMethodTracing;
1046    trace_config_->trace_output_mode = runtime_options.Exists(Opt::MethodTraceStreaming) ?
1047        Trace::TraceOutputMode::kStreaming :
1048        Trace::TraceOutputMode::kFile;
1049  }
1050
1051  {
1052    auto&& profiler_options = runtime_options.ReleaseOrDefault(Opt::ProfilerOpts);
1053    profile_output_filename_ = profiler_options.output_file_name_;
1054
1055    // TODO: Don't do this, just change ProfilerOptions to include the output file name?
1056    ProfilerOptions other_options(
1057        profiler_options.enabled_,
1058        profiler_options.period_s_,
1059        profiler_options.duration_s_,
1060        profiler_options.interval_us_,
1061        profiler_options.backoff_coefficient_,
1062        profiler_options.start_immediately_,
1063        profiler_options.top_k_threshold_,
1064        profiler_options.top_k_change_threshold_,
1065        profiler_options.profile_type_,
1066        profiler_options.max_stack_depth_);
1067
1068    profiler_options_ = other_options;
1069  }
1070
1071  // TODO: move this to just be an Trace::Start argument
1072  Trace::SetDefaultClockSource(runtime_options.GetOrDefault(Opt::ProfileClock));
1073
1074  // Pre-allocate an OutOfMemoryError for the double-OOME case.
1075  self->ThrowNewException("Ljava/lang/OutOfMemoryError;",
1076                          "OutOfMemoryError thrown while trying to throw OutOfMemoryError; "
1077                          "no stack trace available");
1078  pre_allocated_OutOfMemoryError_ = GcRoot<mirror::Throwable>(self->GetException());
1079  self->ClearException();
1080
1081  // Pre-allocate a NoClassDefFoundError for the common case of failing to find a system class
1082  // ahead of checking the application's class loader.
1083  self->ThrowNewException("Ljava/lang/NoClassDefFoundError;",
1084                          "Class not found using the boot class loader; no stack trace available");
1085  pre_allocated_NoClassDefFoundError_ = GcRoot<mirror::Throwable>(self->GetException());
1086  self->ClearException();
1087
1088  // Look for a native bridge.
1089  //
1090  // The intended flow here is, in the case of a running system:
1091  //
1092  // Runtime::Init() (zygote):
1093  //   LoadNativeBridge -> dlopen from cmd line parameter.
1094  //  |
1095  //  V
1096  // Runtime::Start() (zygote):
1097  //   No-op wrt native bridge.
1098  //  |
1099  //  | start app
1100  //  V
1101  // DidForkFromZygote(action)
1102  //   action = kUnload -> dlclose native bridge.
1103  //   action = kInitialize -> initialize library
1104  //
1105  //
1106  // The intended flow here is, in the case of a simple dalvikvm call:
1107  //
1108  // Runtime::Init():
1109  //   LoadNativeBridge -> dlopen from cmd line parameter.
1110  //  |
1111  //  V
1112  // Runtime::Start():
1113  //   DidForkFromZygote(kInitialize) -> try to initialize any native bridge given.
1114  //   No-op wrt native bridge.
1115  {
1116    std::string native_bridge_file_name = runtime_options.ReleaseOrDefault(Opt::NativeBridge);
1117    is_native_bridge_loaded_ = LoadNativeBridge(native_bridge_file_name);
1118  }
1119
1120  VLOG(startup) << "Runtime::Init exiting";
1121
1122  ATRACE_END();
1123
1124  return true;
1125}
1126
1127void Runtime::InitNativeMethods() {
1128  VLOG(startup) << "Runtime::InitNativeMethods entering";
1129  Thread* self = Thread::Current();
1130  JNIEnv* env = self->GetJniEnv();
1131
1132  // Must be in the kNative state for calling native methods (JNI_OnLoad code).
1133  CHECK_EQ(self->GetState(), kNative);
1134
1135  // First set up JniConstants, which is used by both the runtime's built-in native
1136  // methods and libcore.
1137  JniConstants::init(env);
1138  WellKnownClasses::Init(env);
1139
1140  // Then set up the native methods provided by the runtime itself.
1141  RegisterRuntimeNativeMethods(env);
1142
1143  // Then set up libcore, which is just a regular JNI library with a regular JNI_OnLoad.
1144  // Most JNI libraries can just use System.loadLibrary, but libcore can't because it's
1145  // the library that implements System.loadLibrary!
1146  {
1147    std::string reason;
1148    if (!java_vm_->LoadNativeLibrary(env, "libjavacore.so", nullptr, &reason)) {
1149      LOG(FATAL) << "LoadNativeLibrary failed for \"libjavacore.so\": " << reason;
1150    }
1151  }
1152
1153  // Initialize well known classes that may invoke runtime native methods.
1154  WellKnownClasses::LateInit(env);
1155
1156  VLOG(startup) << "Runtime::InitNativeMethods exiting";
1157}
1158
1159void Runtime::InitThreadGroups(Thread* self) {
1160  JNIEnvExt* env = self->GetJniEnv();
1161  ScopedJniEnvLocalRefState env_state(env);
1162  main_thread_group_ =
1163      env->NewGlobalRef(env->GetStaticObjectField(
1164          WellKnownClasses::java_lang_ThreadGroup,
1165          WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup));
1166  CHECK(main_thread_group_ != nullptr || IsAotCompiler());
1167  system_thread_group_ =
1168      env->NewGlobalRef(env->GetStaticObjectField(
1169          WellKnownClasses::java_lang_ThreadGroup,
1170          WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup));
1171  CHECK(system_thread_group_ != nullptr || IsAotCompiler());
1172}
1173
1174jobject Runtime::GetMainThreadGroup() const {
1175  CHECK(main_thread_group_ != nullptr || IsAotCompiler());
1176  return main_thread_group_;
1177}
1178
1179jobject Runtime::GetSystemThreadGroup() const {
1180  CHECK(system_thread_group_ != nullptr || IsAotCompiler());
1181  return system_thread_group_;
1182}
1183
1184jobject Runtime::GetSystemClassLoader() const {
1185  CHECK(system_class_loader_ != nullptr || IsAotCompiler());
1186  return system_class_loader_;
1187}
1188
1189void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) {
1190  register_dalvik_system_DexFile(env);
1191  register_dalvik_system_VMDebug(env);
1192  register_dalvik_system_VMRuntime(env);
1193  register_dalvik_system_VMStack(env);
1194  register_dalvik_system_ZygoteHooks(env);
1195  register_java_lang_Class(env);
1196  register_java_lang_DexCache(env);
1197  register_java_lang_Object(env);
1198  register_java_lang_ref_FinalizerReference(env);
1199  register_java_lang_reflect_Array(env);
1200  register_java_lang_reflect_Constructor(env);
1201  register_java_lang_reflect_Field(env);
1202  register_java_lang_reflect_Method(env);
1203  register_java_lang_reflect_Proxy(env);
1204  register_java_lang_ref_Reference(env);
1205  register_java_lang_Runtime(env);
1206  register_java_lang_String(env);
1207  register_java_lang_StringFactory(env);
1208  register_java_lang_System(env);
1209  register_java_lang_Thread(env);
1210  register_java_lang_Throwable(env);
1211  register_java_lang_VMClassLoader(env);
1212  register_java_util_concurrent_atomic_AtomicLong(env);
1213  register_libcore_util_CharsetUtils(env);
1214  register_org_apache_harmony_dalvik_ddmc_DdmServer(env);
1215  register_org_apache_harmony_dalvik_ddmc_DdmVmInternal(env);
1216  register_sun_misc_Unsafe(env);
1217}
1218
1219void Runtime::DumpForSigQuit(std::ostream& os) {
1220  GetClassLinker()->DumpForSigQuit(os);
1221  GetInternTable()->DumpForSigQuit(os);
1222  GetJavaVM()->DumpForSigQuit(os);
1223  GetHeap()->DumpForSigQuit(os);
1224  TrackedAllocators::Dump(os);
1225  os << "\n";
1226
1227  thread_list_->DumpForSigQuit(os);
1228  BaseMutex::DumpAll(os);
1229}
1230
1231void Runtime::DumpLockHolders(std::ostream& os) {
1232  uint64_t mutator_lock_owner = Locks::mutator_lock_->GetExclusiveOwnerTid();
1233  pid_t thread_list_lock_owner = GetThreadList()->GetLockOwner();
1234  pid_t classes_lock_owner = GetClassLinker()->GetClassesLockOwner();
1235  pid_t dex_lock_owner = GetClassLinker()->GetDexLockOwner();
1236  if ((thread_list_lock_owner | classes_lock_owner | dex_lock_owner) != 0) {
1237    os << "Mutator lock exclusive owner tid: " << mutator_lock_owner << "\n"
1238       << "ThreadList lock owner tid: " << thread_list_lock_owner << "\n"
1239       << "ClassLinker classes lock owner tid: " << classes_lock_owner << "\n"
1240       << "ClassLinker dex lock owner tid: " << dex_lock_owner << "\n";
1241  }
1242}
1243
1244void Runtime::SetStatsEnabled(bool new_state) {
1245  Thread* self = Thread::Current();
1246  MutexLock mu(self, *Locks::instrument_entrypoints_lock_);
1247  if (new_state == true) {
1248    GetStats()->Clear(~0);
1249    // TODO: wouldn't it make more sense to clear _all_ threads' stats?
1250    self->GetStats()->Clear(~0);
1251    if (stats_enabled_ != new_state) {
1252      GetInstrumentation()->InstrumentQuickAllocEntryPointsLocked();
1253    }
1254  } else if (stats_enabled_ != new_state) {
1255    GetInstrumentation()->UninstrumentQuickAllocEntryPointsLocked();
1256  }
1257  stats_enabled_ = new_state;
1258}
1259
1260void Runtime::ResetStats(int kinds) {
1261  GetStats()->Clear(kinds & 0xffff);
1262  // TODO: wouldn't it make more sense to clear _all_ threads' stats?
1263  Thread::Current()->GetStats()->Clear(kinds >> 16);
1264}
1265
1266int32_t Runtime::GetStat(int kind) {
1267  RuntimeStats* stats;
1268  if (kind < (1<<16)) {
1269    stats = GetStats();
1270  } else {
1271    stats = Thread::Current()->GetStats();
1272    kind >>= 16;
1273  }
1274  switch (kind) {
1275  case KIND_ALLOCATED_OBJECTS:
1276    return stats->allocated_objects;
1277  case KIND_ALLOCATED_BYTES:
1278    return stats->allocated_bytes;
1279  case KIND_FREED_OBJECTS:
1280    return stats->freed_objects;
1281  case KIND_FREED_BYTES:
1282    return stats->freed_bytes;
1283  case KIND_GC_INVOCATIONS:
1284    return stats->gc_for_alloc_count;
1285  case KIND_CLASS_INIT_COUNT:
1286    return stats->class_init_count;
1287  case KIND_CLASS_INIT_TIME:
1288    // Convert ns to us, reduce to 32 bits.
1289    return static_cast<int>(stats->class_init_time_ns / 1000);
1290  case KIND_EXT_ALLOCATED_OBJECTS:
1291  case KIND_EXT_ALLOCATED_BYTES:
1292  case KIND_EXT_FREED_OBJECTS:
1293  case KIND_EXT_FREED_BYTES:
1294    return 0;  // backward compatibility
1295  default:
1296    LOG(FATAL) << "Unknown statistic " << kind;
1297    return -1;  // unreachable
1298  }
1299}
1300
1301void Runtime::BlockSignals() {
1302  SignalSet signals;
1303  signals.Add(SIGPIPE);
1304  // SIGQUIT is used to dump the runtime's state (including stack traces).
1305  signals.Add(SIGQUIT);
1306  // SIGUSR1 is used to initiate a GC.
1307  signals.Add(SIGUSR1);
1308  signals.Block();
1309}
1310
1311bool Runtime::AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group,
1312                                  bool create_peer) {
1313  return Thread::Attach(thread_name, as_daemon, thread_group, create_peer) != nullptr;
1314}
1315
1316void Runtime::DetachCurrentThread() {
1317  Thread* self = Thread::Current();
1318  if (self == nullptr) {
1319    LOG(FATAL) << "attempting to detach thread that is not attached";
1320  }
1321  if (self->HasManagedStack()) {
1322    LOG(FATAL) << *Thread::Current() << " attempting to detach while still running code";
1323  }
1324  thread_list_->Unregister(self);
1325}
1326
1327mirror::Throwable* Runtime::GetPreAllocatedOutOfMemoryError() {
1328  mirror::Throwable* oome = pre_allocated_OutOfMemoryError_.Read();
1329  if (oome == nullptr) {
1330    LOG(ERROR) << "Failed to return pre-allocated OOME";
1331  }
1332  return oome;
1333}
1334
1335mirror::Throwable* Runtime::GetPreAllocatedNoClassDefFoundError() {
1336  mirror::Throwable* ncdfe = pre_allocated_NoClassDefFoundError_.Read();
1337  if (ncdfe == nullptr) {
1338    LOG(ERROR) << "Failed to return pre-allocated NoClassDefFoundError";
1339  }
1340  return ncdfe;
1341}
1342
1343void Runtime::VisitConstantRoots(RootVisitor* visitor) {
1344  // Visit the classes held as static in mirror classes, these can be visited concurrently and only
1345  // need to be visited once per GC since they never change.
1346  mirror::Class::VisitRoots(visitor);
1347  mirror::Constructor::VisitRoots(visitor);
1348  mirror::Reference::VisitRoots(visitor);
1349  mirror::Method::VisitRoots(visitor);
1350  mirror::StackTraceElement::VisitRoots(visitor);
1351  mirror::String::VisitRoots(visitor);
1352  mirror::Throwable::VisitRoots(visitor);
1353  mirror::Field::VisitRoots(visitor);
1354  // Visit all the primitive array types classes.
1355  mirror::PrimitiveArray<uint8_t>::VisitRoots(visitor);   // BooleanArray
1356  mirror::PrimitiveArray<int8_t>::VisitRoots(visitor);    // ByteArray
1357  mirror::PrimitiveArray<uint16_t>::VisitRoots(visitor);  // CharArray
1358  mirror::PrimitiveArray<double>::VisitRoots(visitor);    // DoubleArray
1359  mirror::PrimitiveArray<float>::VisitRoots(visitor);     // FloatArray
1360  mirror::PrimitiveArray<int32_t>::VisitRoots(visitor);   // IntArray
1361  mirror::PrimitiveArray<int64_t>::VisitRoots(visitor);   // LongArray
1362  mirror::PrimitiveArray<int16_t>::VisitRoots(visitor);   // ShortArray
1363  // Visiting the roots of these ArtMethods is not currently required since all the GcRoots are
1364  // null.
1365  BufferedRootVisitor<16> buffered_visitor(visitor, RootInfo(kRootVMInternal));
1366  if (HasResolutionMethod()) {
1367    resolution_method_->VisitRoots(buffered_visitor);
1368  }
1369  if (HasImtConflictMethod()) {
1370    imt_conflict_method_->VisitRoots(buffered_visitor);
1371  }
1372  if (imt_unimplemented_method_ != nullptr) {
1373    imt_unimplemented_method_->VisitRoots(buffered_visitor);
1374  }
1375  for (size_t i = 0; i < kLastCalleeSaveType; ++i) {
1376    auto* m = reinterpret_cast<ArtMethod*>(callee_save_methods_[i]);
1377    if (m != nullptr) {
1378      m->VisitRoots(buffered_visitor);
1379    }
1380  }
1381}
1382
1383void Runtime::VisitConcurrentRoots(RootVisitor* visitor, VisitRootFlags flags) {
1384  intern_table_->VisitRoots(visitor, flags);
1385  class_linker_->VisitRoots(visitor, flags);
1386  if ((flags & kVisitRootFlagNewRoots) == 0) {
1387    // Guaranteed to have no new roots in the constant roots.
1388    VisitConstantRoots(visitor);
1389  }
1390}
1391
1392void Runtime::VisitTransactionRoots(RootVisitor* visitor) {
1393  if (preinitialization_transaction_ != nullptr) {
1394    preinitialization_transaction_->VisitRoots(visitor);
1395  }
1396}
1397
1398void Runtime::VisitNonThreadRoots(RootVisitor* visitor) {
1399  java_vm_->VisitRoots(visitor);
1400  sentinel_.VisitRootIfNonNull(visitor, RootInfo(kRootVMInternal));
1401  pre_allocated_OutOfMemoryError_.VisitRootIfNonNull(visitor, RootInfo(kRootVMInternal));
1402  pre_allocated_NoClassDefFoundError_.VisitRootIfNonNull(visitor, RootInfo(kRootVMInternal));
1403  verifier::MethodVerifier::VisitStaticRoots(visitor);
1404  VisitTransactionRoots(visitor);
1405}
1406
1407void Runtime::VisitNonConcurrentRoots(RootVisitor* visitor) {
1408  thread_list_->VisitRoots(visitor);
1409  VisitNonThreadRoots(visitor);
1410}
1411
1412void Runtime::VisitThreadRoots(RootVisitor* visitor) {
1413  thread_list_->VisitRoots(visitor);
1414}
1415
1416size_t Runtime::FlipThreadRoots(Closure* thread_flip_visitor, Closure* flip_callback,
1417                                gc::collector::GarbageCollector* collector) {
1418  return thread_list_->FlipThreadRoots(thread_flip_visitor, flip_callback, collector);
1419}
1420
1421void Runtime::VisitRoots(RootVisitor* visitor, VisitRootFlags flags) {
1422  VisitNonConcurrentRoots(visitor);
1423  VisitConcurrentRoots(visitor, flags);
1424}
1425
1426void Runtime::VisitImageRoots(RootVisitor* visitor) {
1427  for (auto* space : GetHeap()->GetContinuousSpaces()) {
1428    if (space->IsImageSpace()) {
1429      auto* image_space = space->AsImageSpace();
1430      const auto& image_header = image_space->GetImageHeader();
1431      for (size_t i = 0; i < ImageHeader::kImageRootsMax; ++i) {
1432        auto* obj = image_header.GetImageRoot(static_cast<ImageHeader::ImageRoot>(i));
1433        if (obj != nullptr) {
1434          auto* after_obj = obj;
1435          visitor->VisitRoot(&after_obj, RootInfo(kRootStickyClass));
1436          CHECK_EQ(after_obj, obj);
1437        }
1438      }
1439    }
1440  }
1441}
1442
1443ArtMethod* Runtime::CreateImtConflictMethod() {
1444  auto* method = Runtime::Current()->GetClassLinker()->CreateRuntimeMethod();
1445  // When compiling, the code pointer will get set later when the image is loaded.
1446  if (IsAotCompiler()) {
1447    size_t pointer_size = GetInstructionSetPointerSize(instruction_set_);
1448    method->SetEntryPointFromQuickCompiledCodePtrSize(nullptr, pointer_size);
1449  } else {
1450    method->SetEntryPointFromQuickCompiledCode(GetQuickImtConflictStub());
1451  }
1452  return method;
1453}
1454
1455void Runtime::SetImtConflictMethod(ArtMethod* method) {
1456  CHECK(method != nullptr);
1457  CHECK(method->IsRuntimeMethod());
1458  imt_conflict_method_ = method;
1459}
1460
1461ArtMethod* Runtime::CreateResolutionMethod() {
1462  auto* method = Runtime::Current()->GetClassLinker()->CreateRuntimeMethod();
1463  // When compiling, the code pointer will get set later when the image is loaded.
1464  if (IsAotCompiler()) {
1465    size_t pointer_size = GetInstructionSetPointerSize(instruction_set_);
1466    method->SetEntryPointFromQuickCompiledCodePtrSize(nullptr, pointer_size);
1467  } else {
1468    method->SetEntryPointFromQuickCompiledCode(GetQuickResolutionStub());
1469  }
1470  return method;
1471}
1472
1473ArtMethod* Runtime::CreateCalleeSaveMethod() {
1474  auto* method = Runtime::Current()->GetClassLinker()->CreateRuntimeMethod();
1475  size_t pointer_size = GetInstructionSetPointerSize(instruction_set_);
1476  method->SetEntryPointFromQuickCompiledCodePtrSize(nullptr, pointer_size);
1477  DCHECK_NE(instruction_set_, kNone);
1478  DCHECK(method->IsRuntimeMethod());
1479  return method;
1480}
1481
1482void Runtime::DisallowNewSystemWeaks() {
1483  monitor_list_->DisallowNewMonitors();
1484  intern_table_->DisallowNewInterns();
1485  java_vm_->DisallowNewWeakGlobals();
1486}
1487
1488void Runtime::AllowNewSystemWeaks() {
1489  monitor_list_->AllowNewMonitors();
1490  intern_table_->AllowNewInterns();
1491  java_vm_->AllowNewWeakGlobals();
1492}
1493
1494void Runtime::EnsureNewSystemWeaksDisallowed() {
1495  // Lock and unlock the system weak locks once to ensure that no
1496  // threads are still in the middle of adding new system weaks.
1497  monitor_list_->EnsureNewMonitorsDisallowed();
1498  intern_table_->EnsureNewInternsDisallowed();
1499  java_vm_->EnsureNewWeakGlobalsDisallowed();
1500}
1501
1502void Runtime::SetInstructionSet(InstructionSet instruction_set) {
1503  instruction_set_ = instruction_set;
1504  if ((instruction_set_ == kThumb2) || (instruction_set_ == kArm)) {
1505    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1506      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1507      callee_save_method_frame_infos_[i] = arm::ArmCalleeSaveMethodFrameInfo(type);
1508    }
1509  } else if (instruction_set_ == kMips) {
1510    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1511      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1512      callee_save_method_frame_infos_[i] = mips::MipsCalleeSaveMethodFrameInfo(type);
1513    }
1514  } else if (instruction_set_ == kMips64) {
1515    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1516      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1517      callee_save_method_frame_infos_[i] = mips64::Mips64CalleeSaveMethodFrameInfo(type);
1518    }
1519  } else if (instruction_set_ == kX86) {
1520    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1521      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1522      callee_save_method_frame_infos_[i] = x86::X86CalleeSaveMethodFrameInfo(type);
1523    }
1524  } else if (instruction_set_ == kX86_64) {
1525    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1526      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1527      callee_save_method_frame_infos_[i] = x86_64::X86_64CalleeSaveMethodFrameInfo(type);
1528    }
1529  } else if (instruction_set_ == kArm64) {
1530    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1531      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1532      callee_save_method_frame_infos_[i] = arm64::Arm64CalleeSaveMethodFrameInfo(type);
1533    }
1534  } else {
1535    UNIMPLEMENTED(FATAL) << instruction_set_;
1536  }
1537}
1538
1539void Runtime::SetCalleeSaveMethod(ArtMethod* method, CalleeSaveType type) {
1540  DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastCalleeSaveType));
1541  CHECK(method != nullptr);
1542  callee_save_methods_[type] = reinterpret_cast<uintptr_t>(method);
1543}
1544
1545void Runtime::StartProfiler(const char* profile_output_filename) {
1546  profile_output_filename_ = profile_output_filename;
1547  profiler_started_ =
1548      BackgroundMethodSamplingProfiler::Start(profile_output_filename_, profiler_options_);
1549}
1550
1551// Transaction support.
1552void Runtime::EnterTransactionMode(Transaction* transaction) {
1553  DCHECK(IsAotCompiler());
1554  DCHECK(transaction != nullptr);
1555  DCHECK(!IsActiveTransaction());
1556  preinitialization_transaction_ = transaction;
1557}
1558
1559void Runtime::ExitTransactionMode() {
1560  DCHECK(IsAotCompiler());
1561  DCHECK(IsActiveTransaction());
1562  preinitialization_transaction_ = nullptr;
1563}
1564
1565bool Runtime::IsTransactionAborted() const {
1566  if (!IsActiveTransaction()) {
1567    return false;
1568  } else {
1569    DCHECK(IsAotCompiler());
1570    return preinitialization_transaction_->IsAborted();
1571  }
1572}
1573
1574void Runtime::AbortTransactionAndThrowAbortError(Thread* self, const std::string& abort_message) {
1575  DCHECK(IsAotCompiler());
1576  DCHECK(IsActiveTransaction());
1577  // Throwing an exception may cause its class initialization. If we mark the transaction
1578  // aborted before that, we may warn with a false alarm. Throwing the exception before
1579  // marking the transaction aborted avoids that.
1580  preinitialization_transaction_->ThrowAbortError(self, &abort_message);
1581  preinitialization_transaction_->Abort(abort_message);
1582}
1583
1584void Runtime::ThrowTransactionAbortError(Thread* self) {
1585  DCHECK(IsAotCompiler());
1586  DCHECK(IsActiveTransaction());
1587  // Passing nullptr means we rethrow an exception with the earlier transaction abort message.
1588  preinitialization_transaction_->ThrowAbortError(self, nullptr);
1589}
1590
1591void Runtime::RecordWriteFieldBoolean(mirror::Object* obj, MemberOffset field_offset,
1592                                      uint8_t value, bool is_volatile) const {
1593  DCHECK(IsAotCompiler());
1594  DCHECK(IsActiveTransaction());
1595  preinitialization_transaction_->RecordWriteFieldBoolean(obj, field_offset, value, is_volatile);
1596}
1597
1598void Runtime::RecordWriteFieldByte(mirror::Object* obj, MemberOffset field_offset,
1599                                   int8_t value, bool is_volatile) const {
1600  DCHECK(IsAotCompiler());
1601  DCHECK(IsActiveTransaction());
1602  preinitialization_transaction_->RecordWriteFieldByte(obj, field_offset, value, is_volatile);
1603}
1604
1605void Runtime::RecordWriteFieldChar(mirror::Object* obj, MemberOffset field_offset,
1606                                   uint16_t value, bool is_volatile) const {
1607  DCHECK(IsAotCompiler());
1608  DCHECK(IsActiveTransaction());
1609  preinitialization_transaction_->RecordWriteFieldChar(obj, field_offset, value, is_volatile);
1610}
1611
1612void Runtime::RecordWriteFieldShort(mirror::Object* obj, MemberOffset field_offset,
1613                                    int16_t value, bool is_volatile) const {
1614  DCHECK(IsAotCompiler());
1615  DCHECK(IsActiveTransaction());
1616  preinitialization_transaction_->RecordWriteFieldShort(obj, field_offset, value, is_volatile);
1617}
1618
1619void Runtime::RecordWriteField32(mirror::Object* obj, MemberOffset field_offset,
1620                                 uint32_t value, bool is_volatile) const {
1621  DCHECK(IsAotCompiler());
1622  DCHECK(IsActiveTransaction());
1623  preinitialization_transaction_->RecordWriteField32(obj, field_offset, value, is_volatile);
1624}
1625
1626void Runtime::RecordWriteField64(mirror::Object* obj, MemberOffset field_offset,
1627                                 uint64_t value, bool is_volatile) const {
1628  DCHECK(IsAotCompiler());
1629  DCHECK(IsActiveTransaction());
1630  preinitialization_transaction_->RecordWriteField64(obj, field_offset, value, is_volatile);
1631}
1632
1633void Runtime::RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset,
1634                                        mirror::Object* value, bool is_volatile) const {
1635  DCHECK(IsAotCompiler());
1636  DCHECK(IsActiveTransaction());
1637  preinitialization_transaction_->RecordWriteFieldReference(obj, field_offset, value, is_volatile);
1638}
1639
1640void Runtime::RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const {
1641  DCHECK(IsAotCompiler());
1642  DCHECK(IsActiveTransaction());
1643  preinitialization_transaction_->RecordWriteArray(array, index, value);
1644}
1645
1646void Runtime::RecordStrongStringInsertion(mirror::String* s) const {
1647  DCHECK(IsAotCompiler());
1648  DCHECK(IsActiveTransaction());
1649  preinitialization_transaction_->RecordStrongStringInsertion(s);
1650}
1651
1652void Runtime::RecordWeakStringInsertion(mirror::String* s) const {
1653  DCHECK(IsAotCompiler());
1654  DCHECK(IsActiveTransaction());
1655  preinitialization_transaction_->RecordWeakStringInsertion(s);
1656}
1657
1658void Runtime::RecordStrongStringRemoval(mirror::String* s) const {
1659  DCHECK(IsAotCompiler());
1660  DCHECK(IsActiveTransaction());
1661  preinitialization_transaction_->RecordStrongStringRemoval(s);
1662}
1663
1664void Runtime::RecordWeakStringRemoval(mirror::String* s) const {
1665  DCHECK(IsAotCompiler());
1666  DCHECK(IsActiveTransaction());
1667  preinitialization_transaction_->RecordWeakStringRemoval(s);
1668}
1669
1670void Runtime::SetFaultMessage(const std::string& message) {
1671  MutexLock mu(Thread::Current(), fault_message_lock_);
1672  fault_message_ = message;
1673}
1674
1675void Runtime::AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* argv)
1676    const {
1677  if (GetInstrumentation()->InterpretOnly() || UseJit()) {
1678    argv->push_back("--compiler-filter=interpret-only");
1679  }
1680
1681  // Make the dex2oat instruction set match that of the launching runtime. If we have multiple
1682  // architecture support, dex2oat may be compiled as a different instruction-set than that
1683  // currently being executed.
1684  std::string instruction_set("--instruction-set=");
1685  instruction_set += GetInstructionSetString(kRuntimeISA);
1686  argv->push_back(instruction_set);
1687
1688  std::unique_ptr<const InstructionSetFeatures> features(InstructionSetFeatures::FromCppDefines());
1689  std::string feature_string("--instruction-set-features=");
1690  feature_string += features->GetFeatureString();
1691  argv->push_back(feature_string);
1692}
1693
1694void Runtime::UpdateProfilerState(int state) {
1695  VLOG(profiler) << "Profiler state updated to " << state;
1696}
1697
1698void Runtime::CreateJit() {
1699  CHECK(!IsAotCompiler());
1700  if (GetInstrumentation()->IsForcedInterpretOnly()) {
1701    // Don't create JIT if forced interpret only.
1702    return;
1703  }
1704  std::string error_msg;
1705  jit_.reset(jit::Jit::Create(jit_options_.get(), &error_msg));
1706  if (jit_.get() != nullptr) {
1707    compiler_callbacks_ = jit_->GetCompilerCallbacks();
1708    jit_->CreateInstrumentationCache(jit_options_->GetCompileThreshold());
1709    jit_->CreateThreadPool();
1710  } else {
1711    LOG(WARNING) << "Failed to create JIT " << error_msg;
1712  }
1713}
1714
1715bool Runtime::CanRelocate() const {
1716  return !IsAotCompiler() || compiler_callbacks_->IsRelocationPossible();
1717}
1718
1719bool Runtime::IsCompilingBootImage() const {
1720  return IsCompiler() && compiler_callbacks_->IsBootImage();
1721}
1722
1723void Runtime::SetResolutionMethod(ArtMethod* method) {
1724  CHECK(method != nullptr);
1725  CHECK(method->IsRuntimeMethod()) << method;
1726  resolution_method_ = method;
1727}
1728
1729void Runtime::SetImtUnimplementedMethod(ArtMethod* method) {
1730  CHECK(method != nullptr);
1731  CHECK(method->IsRuntimeMethod());
1732  imt_unimplemented_method_ = method;
1733}
1734
1735}  // namespace art
1736