runtime.cc revision 6d031046eeb5e9f62b657df0695b752e1d0aa583 
1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "runtime.h"
18
19// sys/mount.h has to come before linux/fs.h due to redefinition of MS_RDONLY, MS_BIND, etc
20#include <sys/mount.h>
21#ifdef __linux__
22#include <linux/fs.h>
23#endif
24
25#include <signal.h>
26#include <sys/syscall.h>
27#include <valgrind.h>
28
29#include <cstdio>
30#include <cstdlib>
31#include <limits>
32#include <memory>
33#include <vector>
34#include <fcntl.h>
35
36#include "arch/arm/quick_method_frame_info_arm.h"
37#include "arch/arm/registers_arm.h"
38#include "arch/arm64/quick_method_frame_info_arm64.h"
39#include "arch/arm64/registers_arm64.h"
40#include "arch/mips/quick_method_frame_info_mips.h"
41#include "arch/mips/registers_mips.h"
42#include "arch/x86/quick_method_frame_info_x86.h"
43#include "arch/x86/registers_x86.h"
44#include "arch/x86_64/quick_method_frame_info_x86_64.h"
45#include "arch/x86_64/registers_x86_64.h"
46#include "atomic.h"
47#include "class_linker.h"
48#include "debugger.h"
49#include "elf_file.h"
50#include "fault_handler.h"
51#include "gc/accounting/card_table-inl.h"
52#include "gc/heap.h"
53#include "gc/space/image_space.h"
54#include "gc/space/space.h"
55#include "image.h"
56#include "instrumentation.h"
57#include "intern_table.h"
58#include "jni_internal.h"
59#include "mirror/art_field-inl.h"
60#include "mirror/art_method-inl.h"
61#include "mirror/array.h"
62#include "mirror/class-inl.h"
63#include "mirror/class_loader.h"
64#include "mirror/stack_trace_element.h"
65#include "mirror/throwable.h"
66#include "monitor.h"
67#include "native_bridge_art_interface.h"
68#include "parsed_options.h"
69#include "oat_file.h"
70#include "os.h"
71#include "quick/quick_method_frame_info.h"
72#include "reflection.h"
73#include "ScopedLocalRef.h"
74#include "scoped_thread_state_change.h"
75#include "signal_catcher.h"
76#include "signal_set.h"
77#include "handle_scope-inl.h"
78#include "thread.h"
79#include "thread_list.h"
80#include "trace.h"
81#include "transaction.h"
82#include "profiler.h"
83#include "verifier/method_verifier.h"
84#include "well_known_classes.h"
85
86#include "JniConstants.h"  // Last to avoid LOG redefinition in ics-mr1-plus-art.
87
88#ifdef HAVE_ANDROID_OS
89#include "cutils/properties.h"
90#endif
91
92namespace art {
93
94static constexpr bool kEnableJavaStackTraceHandler = true;
95const char* Runtime::kDefaultInstructionSetFeatures =
96    STRINGIFY(ART_DEFAULT_INSTRUCTION_SET_FEATURES);
97Runtime* Runtime::instance_ = NULL;
98
99Runtime::Runtime()
100    : instruction_set_(kNone),
101      compiler_callbacks_(nullptr),
102      is_zygote_(false),
103      must_relocate_(false),
104      is_concurrent_gc_enabled_(true),
105      is_explicit_gc_disabled_(false),
106      dex2oat_enabled_(true),
107      image_dex2oat_enabled_(true),
108      default_stack_size_(0),
109      heap_(nullptr),
110      max_spins_before_thin_lock_inflation_(Monitor::kDefaultMaxSpinsBeforeThinLockInflation),
111      monitor_list_(nullptr),
112      monitor_pool_(nullptr),
113      thread_list_(nullptr),
114      intern_table_(nullptr),
115      class_linker_(nullptr),
116      signal_catcher_(nullptr),
117      java_vm_(nullptr),
118      fault_message_lock_("Fault message lock"),
119      fault_message_(""),
120      method_verifier_lock_("Method verifiers lock"),
121      threads_being_born_(0),
122      shutdown_cond_(new ConditionVariable("Runtime shutdown", *Locks::runtime_shutdown_lock_)),
123      shutting_down_(false),
124      shutting_down_started_(false),
125      started_(false),
126      finished_starting_(false),
127      vfprintf_(nullptr),
128      exit_(nullptr),
129      abort_(nullptr),
130      stats_enabled_(false),
131      running_on_valgrind_(RUNNING_ON_VALGRIND > 0),
132      profiler_started_(false),
133      method_trace_(false),
134      method_trace_file_size_(0),
135      instrumentation_(),
136      use_compile_time_class_path_(false),
137      main_thread_group_(nullptr),
138      system_thread_group_(nullptr),
139      system_class_loader_(nullptr),
140      dump_gc_performance_on_shutdown_(false),
141      preinitialization_transaction_(nullptr),
142      null_pointer_handler_(nullptr),
143      suspend_handler_(nullptr),
144      stack_overflow_handler_(nullptr),
145      verify_(false),
146      target_sdk_version_(0),
147      implicit_null_checks_(false),
148      implicit_so_checks_(false),
149      implicit_suspend_checks_(false) {
150}
151
152Runtime::~Runtime() {
153  if (dump_gc_performance_on_shutdown_) {
154    // This can't be called from the Heap destructor below because it
155    // could call RosAlloc::InspectAll() which needs the thread_list
156    // to be still alive.
157    heap_->DumpGcPerformanceInfo(LOG(INFO));
158  }
159
160  Thread* self = Thread::Current();
161  {
162    MutexLock mu(self, *Locks::runtime_shutdown_lock_);
163    shutting_down_started_ = true;
164    while (threads_being_born_ > 0) {
165      shutdown_cond_->Wait(self);
166    }
167    shutting_down_ = true;
168  }
169  // Shut down background profiler before the runtime exits.
170  if (profiler_started_) {
171    BackgroundMethodSamplingProfiler::Shutdown();
172  }
173
174  // Shutdown the fault manager if it was initialized.
175  fault_manager.Shutdown();
176
177  Trace::Shutdown();
178
179  // Make sure to let the GC complete if it is running.
180  heap_->WaitForGcToComplete(gc::kGcCauseBackground, self);
181  heap_->DeleteThreadPool();
182
183  // Make sure our internal threads are dead before we start tearing down things they're using.
184  Dbg::StopJdwp();
185  delete signal_catcher_;
186
187  // Make sure all other non-daemon threads have terminated, and all daemon threads are suspended.
188  delete thread_list_;
189  delete monitor_list_;
190  delete monitor_pool_;
191  delete class_linker_;
192  delete heap_;
193  delete intern_table_;
194  delete java_vm_;
195  Thread::Shutdown();
196  QuasiAtomic::Shutdown();
197  verifier::MethodVerifier::Shutdown();
198  // TODO: acquire a static mutex on Runtime to avoid racing.
199  CHECK(instance_ == nullptr || instance_ == this);
200  instance_ = nullptr;
201
202  delete null_pointer_handler_;
203  delete suspend_handler_;
204  delete stack_overflow_handler_;
205}
206
207struct AbortState {
208  void Dump(std::ostream& os) NO_THREAD_SAFETY_ANALYSIS {
209    if (gAborting > 1) {
210      os << "Runtime aborting --- recursively, so no thread-specific detail!\n";
211      return;
212    }
213    gAborting++;
214    os << "Runtime aborting...\n";
215    if (Runtime::Current() == NULL) {
216      os << "(Runtime does not yet exist!)\n";
217      return;
218    }
219    Thread* self = Thread::Current();
220    if (self == nullptr) {
221      os << "(Aborting thread was not attached to runtime!)\n";
222      DumpKernelStack(os, GetTid(), "  kernel: ", false);
223      DumpNativeStack(os, GetTid(), "  native: ", nullptr);
224    } else {
225      os << "Aborting thread:\n";
226      if (Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)) {
227        DumpThread(os, self);
228      } else {
229        if (Locks::mutator_lock_->SharedTryLock(self)) {
230          DumpThread(os, self);
231          Locks::mutator_lock_->SharedUnlock(self);
232        }
233      }
234    }
235    DumpAllThreads(os, self);
236  }
237
238  void DumpThread(std::ostream& os, Thread* self) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
239    self->Dump(os);
240    if (self->IsExceptionPending()) {
241      ThrowLocation throw_location;
242      mirror::Throwable* exception = self->GetException(&throw_location);
243      os << "Pending exception " << PrettyTypeOf(exception)
244          << " thrown by '" << throw_location.Dump() << "'\n"
245          << exception->Dump();
246    }
247  }
248
249  void DumpAllThreads(std::ostream& os, Thread* self) NO_THREAD_SAFETY_ANALYSIS {
250    Runtime* runtime = Runtime::Current();
251    if (runtime != nullptr) {
252      ThreadList* thread_list = runtime->GetThreadList();
253      if (thread_list != nullptr) {
254        bool tll_already_held = Locks::thread_list_lock_->IsExclusiveHeld(self);
255        bool ml_already_held = Locks::mutator_lock_->IsSharedHeld(self);
256        if (!tll_already_held || !ml_already_held) {
257          os << "Dumping all threads without appropriate locks held:"
258              << (!tll_already_held ? " thread list lock" : "")
259              << (!ml_already_held ? " mutator lock" : "")
260              << "\n";
261        }
262        os << "All threads:\n";
263        thread_list->DumpLocked(os);
264      }
265    }
266  }
267};
268
269void Runtime::Abort() {
270  gAborting++;  // set before taking any locks
271
272  // Ensure that we don't have multiple threads trying to abort at once,
273  // which would result in significantly worse diagnostics.
274  MutexLock mu(Thread::Current(), *Locks::abort_lock_);
275
276  // Get any pending output out of the way.
277  fflush(NULL);
278
279  // Many people have difficulty distinguish aborts from crashes,
280  // so be explicit.
281  AbortState state;
282  LOG(INTERNAL_FATAL) << Dumpable<AbortState>(state);
283
284  // Call the abort hook if we have one.
285  if (Runtime::Current() != NULL && Runtime::Current()->abort_ != NULL) {
286    LOG(INTERNAL_FATAL) << "Calling abort hook...";
287    Runtime::Current()->abort_();
288    // notreached
289    LOG(INTERNAL_FATAL) << "Unexpectedly returned from abort hook!";
290  }
291
292#if defined(__GLIBC__)
293  // TODO: we ought to be able to use pthread_kill(3) here (or abort(3),
294  // which POSIX defines in terms of raise(3), which POSIX defines in terms
295  // of pthread_kill(3)). On Linux, though, libcorkscrew can't unwind through
296  // libpthread, which means the stacks we dump would be useless. Calling
297  // tgkill(2) directly avoids that.
298  syscall(__NR_tgkill, getpid(), GetTid(), SIGABRT);
299  // TODO: LLVM installs it's own SIGABRT handler so exit to be safe... Can we disable that in LLVM?
300  // If not, we could use sigaction(3) before calling tgkill(2) and lose this call to exit(3).
301  exit(1);
302#else
303  abort();
304#endif
305  // notreached
306}
307
308void Runtime::PreZygoteFork() {
309  heap_->PreZygoteFork();
310}
311
312void Runtime::CallExitHook(jint status) {
313  if (exit_ != NULL) {
314    ScopedThreadStateChange tsc(Thread::Current(), kNative);
315    exit_(status);
316    LOG(WARNING) << "Exit hook returned instead of exiting!";
317  }
318}
319
320void Runtime::SweepSystemWeaks(IsMarkedCallback* visitor, void* arg) {
321  GetInternTable()->SweepInternTableWeaks(visitor, arg);
322  GetMonitorList()->SweepMonitorList(visitor, arg);
323  GetJavaVM()->SweepJniWeakGlobals(visitor, arg);
324}
325
326bool Runtime::Create(const RuntimeOptions& options, bool ignore_unrecognized) {
327  // TODO: acquire a static mutex on Runtime to avoid racing.
328  if (Runtime::instance_ != NULL) {
329    return false;
330  }
331  InitLogging(NULL);  // Calls Locks::Init() as a side effect.
332  instance_ = new Runtime;
333  if (!instance_->Init(options, ignore_unrecognized)) {
334    delete instance_;
335    instance_ = NULL;
336    return false;
337  }
338  return true;
339}
340
341jobject CreateSystemClassLoader() {
342  if (Runtime::Current()->UseCompileTimeClassPath()) {
343    return NULL;
344  }
345
346  ScopedObjectAccess soa(Thread::Current());
347  ClassLinker* cl = Runtime::Current()->GetClassLinker();
348
349  StackHandleScope<3> hs(soa.Self());
350  Handle<mirror::Class> class_loader_class(
351      hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_ClassLoader)));
352  CHECK(cl->EnsureInitialized(class_loader_class, true, true));
353
354  mirror::ArtMethod* getSystemClassLoader =
355      class_loader_class->FindDirectMethod("getSystemClassLoader", "()Ljava/lang/ClassLoader;");
356  CHECK(getSystemClassLoader != NULL);
357
358  JValue result = InvokeWithJValues(soa, nullptr, soa.EncodeMethod(getSystemClassLoader), nullptr);
359  Handle<mirror::ClassLoader> class_loader(
360      hs.NewHandle(down_cast<mirror::ClassLoader*>(result.GetL())));
361  CHECK(class_loader.Get() != nullptr);
362  JNIEnv* env = soa.Self()->GetJniEnv();
363  ScopedLocalRef<jobject> system_class_loader(env,
364                                              soa.AddLocalReference<jobject>(class_loader.Get()));
365  CHECK(system_class_loader.get() != nullptr);
366
367  soa.Self()->SetClassLoaderOverride(class_loader.Get());
368
369  Handle<mirror::Class> thread_class(
370      hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_Thread)));
371  CHECK(cl->EnsureInitialized(thread_class, true, true));
372
373  mirror::ArtField* contextClassLoader =
374      thread_class->FindDeclaredInstanceField("contextClassLoader", "Ljava/lang/ClassLoader;");
375  CHECK(contextClassLoader != NULL);
376
377  // We can't run in a transaction yet.
378  contextClassLoader->SetObject<false>(soa.Self()->GetPeer(), class_loader.Get());
379
380  return env->NewGlobalRef(system_class_loader.get());
381}
382
383std::string Runtime::GetPatchoatExecutable() const {
384  if (!patchoat_executable_.empty()) {
385    return patchoat_executable_;
386  }
387  std::string patchoat_executable_(GetAndroidRoot());
388  patchoat_executable_ += (kIsDebugBuild ? "/bin/patchoatd" : "/bin/patchoat");
389  return patchoat_executable_;
390}
391
392std::string Runtime::GetCompilerExecutable() const {
393  if (!compiler_executable_.empty()) {
394    return compiler_executable_;
395  }
396  std::string compiler_executable(GetAndroidRoot());
397  compiler_executable += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat");
398  return compiler_executable;
399}
400
401bool Runtime::Start() {
402  VLOG(startup) << "Runtime::Start entering";
403
404  // Restore main thread state to kNative as expected by native code.
405  Thread* self = Thread::Current();
406
407  self->TransitionFromRunnableToSuspended(kNative);
408
409  started_ = true;
410
411  if (!IsImageDex2OatEnabled() || !Runtime::Current()->GetHeap()->HasImageSpace()) {
412    ScopedObjectAccess soa(Thread::Current());
413    StackHandleScope<1> hs(soa.Self());
414    auto klass(hs.NewHandle<mirror::Class>(mirror::Class::GetJavaLangClass()));
415    class_linker_->EnsureInitialized(klass, true, true);
416  }
417
418  // InitNativeMethods needs to be after started_ so that the classes
419  // it touches will have methods linked to the oat file if necessary.
420  InitNativeMethods();
421
422  // Initialize well known thread group values that may be accessed threads while attaching.
423  InitThreadGroups(self);
424
425  Thread::FinishStartup();
426
427  system_class_loader_ = CreateSystemClassLoader();
428
429  if (is_zygote_) {
430    if (!InitZygote()) {
431      return false;
432    }
433  } else {
434    bool have_native_bridge = !native_bridge_library_filename_.empty();
435    if (have_native_bridge) {
436      PreInitializeNativeBridge(".");
437    }
438    DidForkFromZygote(self->GetJniEnv(), have_native_bridge ? NativeBridgeAction::kInitialize :
439        NativeBridgeAction::kUnload, GetInstructionSetString(kRuntimeISA));
440  }
441
442  StartDaemonThreads();
443
444  {
445    ScopedObjectAccess soa(self);
446    self->GetJniEnv()->locals.AssertEmpty();
447  }
448
449  VLOG(startup) << "Runtime::Start exiting";
450  finished_starting_ = true;
451
452  if (profiler_options_.IsEnabled() && !profile_output_filename_.empty()) {
453    // User has asked for a profile using -Xenable-profiler.
454    // Create the profile file if it doesn't exist.
455    int fd = open(profile_output_filename_.c_str(), O_RDWR|O_CREAT|O_EXCL, 0660);
456    if (fd >= 0) {
457      close(fd);
458    } else if (errno != EEXIST) {
459      LOG(INFO) << "Failed to access the profile file. Profiler disabled.";
460      return true;
461    }
462    StartProfiler(profile_output_filename_.c_str());
463  }
464
465  return true;
466}
467
468void Runtime::EndThreadBirth() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) {
469  DCHECK_GT(threads_being_born_, 0U);
470  threads_being_born_--;
471  if (shutting_down_started_ && threads_being_born_ == 0) {
472    shutdown_cond_->Broadcast(Thread::Current());
473  }
474}
475
476// Do zygote-mode-only initialization.
477bool Runtime::InitZygote() {
478#ifdef __linux__
479  // zygote goes into its own process group
480  setpgid(0, 0);
481
482  // See storage config details at http://source.android.com/tech/storage/
483  // Create private mount namespace shared by all children
484  if (unshare(CLONE_NEWNS) == -1) {
485    PLOG(WARNING) << "Failed to unshare()";
486    return false;
487  }
488
489  // Mark rootfs as being a slave so that changes from default
490  // namespace only flow into our children.
491  if (mount("rootfs", "/", NULL, (MS_SLAVE | MS_REC), NULL) == -1) {
492    PLOG(WARNING) << "Failed to mount() rootfs as MS_SLAVE";
493    return false;
494  }
495
496  // Create a staging tmpfs that is shared by our children; they will
497  // bind mount storage into their respective private namespaces, which
498  // are isolated from each other.
499  const char* target_base = getenv("EMULATED_STORAGE_TARGET");
500  if (target_base != NULL) {
501    if (mount("tmpfs", target_base, "tmpfs", MS_NOSUID | MS_NODEV,
502              "uid=0,gid=1028,mode=0751") == -1) {
503      LOG(WARNING) << "Failed to mount tmpfs to " << target_base;
504      return false;
505    }
506  }
507
508  return true;
509#else
510  UNIMPLEMENTED(FATAL);
511  return false;
512#endif
513}
514
515void Runtime::DidForkFromZygote(JNIEnv* env, NativeBridgeAction action, const char* isa) {
516  is_zygote_ = false;
517
518  switch (action) {
519    case NativeBridgeAction::kUnload:
520      UnloadNativeBridge();
521      break;
522
523    case NativeBridgeAction::kInitialize:
524      InitializeNativeBridge(env, isa);
525      break;
526  }
527
528  // Create the thread pool.
529  heap_->CreateThreadPool();
530
531  StartSignalCatcher();
532
533  // Start the JDWP thread. If the command-line debugger flags specified "suspend=y",
534  // this will pause the runtime, so we probably want this to come last.
535  Dbg::StartJdwp();
536}
537
538void Runtime::StartSignalCatcher() {
539  if (!is_zygote_) {
540    signal_catcher_ = new SignalCatcher(stack_trace_file_);
541  }
542}
543
544bool Runtime::IsShuttingDown(Thread* self) {
545  MutexLock mu(self, *Locks::runtime_shutdown_lock_);
546  return IsShuttingDownLocked();
547}
548
549void Runtime::StartDaemonThreads() {
550  VLOG(startup) << "Runtime::StartDaemonThreads entering";
551
552  Thread* self = Thread::Current();
553
554  // Must be in the kNative state for calling native methods.
555  CHECK_EQ(self->GetState(), kNative);
556
557  JNIEnv* env = self->GetJniEnv();
558  env->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons,
559                            WellKnownClasses::java_lang_Daemons_start);
560  if (env->ExceptionCheck()) {
561    env->ExceptionDescribe();
562    LOG(FATAL) << "Error starting java.lang.Daemons";
563  }
564
565  VLOG(startup) << "Runtime::StartDaemonThreads exiting";
566}
567
568static bool OpenDexFilesFromImage(const std::vector<std::string>& dex_filenames,
569                                  const std::string& image_location,
570                                  std::vector<const DexFile*>& dex_files,
571                                  size_t* failures) {
572  std::string system_filename;
573  bool has_system = false;
574  std::string cache_filename_unused;
575  bool dalvik_cache_exists_unused;
576  bool has_cache_unused;
577  bool is_global_cache_unused;
578  bool found_image = gc::space::ImageSpace::FindImageFilename(image_location.c_str(),
579                                                              kRuntimeISA,
580                                                              &system_filename,
581                                                              &has_system,
582                                                              &cache_filename_unused,
583                                                              &dalvik_cache_exists_unused,
584                                                              &has_cache_unused,
585                                                              &is_global_cache_unused);
586  *failures = 0;
587  if (!found_image || !has_system) {
588    return false;
589  }
590  std::string error_msg;
591  // We are falling back to non-executable use of the oat file because patching failed, presumably
592  // due to lack of space.
593  std::string oat_filename = ImageHeader::GetOatLocationFromImageLocation(system_filename.c_str());
594  std::string oat_location = ImageHeader::GetOatLocationFromImageLocation(image_location.c_str());
595  std::unique_ptr<File> file(OS::OpenFileForReading(oat_filename.c_str()));
596  if (file.get() == nullptr) {
597    return false;
598  }
599  std::unique_ptr<ElfFile> elf_file(ElfFile::Open(file.release(), false, false, &error_msg));
600  if (elf_file.get() == nullptr) {
601    return false;
602  }
603  std::unique_ptr<OatFile> oat_file(OatFile::OpenWithElfFile(elf_file.release(), oat_location,
604                                                             &error_msg));
605  if (oat_file.get() == nullptr) {
606    LOG(INFO) << "Unable to use '" << oat_filename << "' because " << error_msg;
607    return false;
608  }
609
610  for (const OatFile::OatDexFile* oat_dex_file : oat_file->GetOatDexFiles()) {
611    if (oat_dex_file == nullptr) {
612      *failures += 1;
613      continue;
614    }
615    const DexFile* dex_file = oat_dex_file->OpenDexFile(&error_msg);
616    if (dex_file == nullptr) {
617      *failures += 1;
618    } else {
619      dex_files.push_back(dex_file);
620    }
621  }
622  Runtime::Current()->GetClassLinker()->RegisterOatFile(oat_file.release());
623  return true;
624}
625
626
627static size_t OpenDexFiles(const std::vector<std::string>& dex_filenames,
628                           const std::string& image_location,
629                           std::vector<const DexFile*>& dex_files) {
630  size_t failure_count = 0;
631  if (!image_location.empty() && OpenDexFilesFromImage(dex_filenames, image_location, dex_files,
632                                                       &failure_count)) {
633    return failure_count;
634  }
635  failure_count = 0;
636  for (size_t i = 0; i < dex_filenames.size(); i++) {
637    const char* dex_filename = dex_filenames[i].c_str();
638    std::string error_msg;
639    if (!OS::FileExists(dex_filename)) {
640      LOG(WARNING) << "Skipping non-existent dex file '" << dex_filename << "'";
641      continue;
642    }
643    if (!DexFile::Open(dex_filename, dex_filename, &error_msg, &dex_files)) {
644      LOG(WARNING) << "Failed to open .dex from file '" << dex_filename << "': " << error_msg;
645      ++failure_count;
646    }
647  }
648  return failure_count;
649}
650
651bool Runtime::Init(const RuntimeOptions& raw_options, bool ignore_unrecognized) {
652  CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize);
653
654  std::unique_ptr<ParsedOptions> options(ParsedOptions::Create(raw_options, ignore_unrecognized));
655  if (options.get() == nullptr) {
656    LOG(ERROR) << "Failed to parse options";
657    return false;
658  }
659  VLOG(startup) << "Runtime::Init -verbose:startup enabled";
660
661  QuasiAtomic::Startup();
662
663  Monitor::Init(options->lock_profiling_threshold_, options->hook_is_sensitive_thread_);
664
665  boot_class_path_string_ = options->boot_class_path_string_;
666  class_path_string_ = options->class_path_string_;
667  properties_ = options->properties_;
668
669  compiler_callbacks_ = options->compiler_callbacks_;
670  patchoat_executable_ = options->patchoat_executable_;
671  must_relocate_ = options->must_relocate_;
672  is_zygote_ = options->is_zygote_;
673  is_explicit_gc_disabled_ = options->is_explicit_gc_disabled_;
674  dex2oat_enabled_ = options->dex2oat_enabled_;
675  image_dex2oat_enabled_ = options->image_dex2oat_enabled_;
676
677  vfprintf_ = options->hook_vfprintf_;
678  exit_ = options->hook_exit_;
679  abort_ = options->hook_abort_;
680
681  default_stack_size_ = options->stack_size_;
682  stack_trace_file_ = options->stack_trace_file_;
683
684  compiler_executable_ = options->compiler_executable_;
685  compiler_options_ = options->compiler_options_;
686  image_compiler_options_ = options->image_compiler_options_;
687
688  max_spins_before_thin_lock_inflation_ = options->max_spins_before_thin_lock_inflation_;
689
690  monitor_list_ = new MonitorList;
691  monitor_pool_ = MonitorPool::Create();
692  thread_list_ = new ThreadList;
693  intern_table_ = new InternTable;
694
695  verify_ = options->verify_;
696
697  if (options->interpreter_only_) {
698    GetInstrumentation()->ForceInterpretOnly();
699  }
700
701  heap_ = new gc::Heap(options->heap_initial_size_,
702                       options->heap_growth_limit_,
703                       options->heap_min_free_,
704                       options->heap_max_free_,
705                       options->heap_target_utilization_,
706                       options->foreground_heap_growth_multiplier_,
707                       options->heap_maximum_size_,
708                       options->heap_non_moving_space_capacity_,
709                       options->image_,
710                       options->image_isa_,
711                       options->collector_type_,
712                       options->background_collector_type_,
713                       options->parallel_gc_threads_,
714                       options->conc_gc_threads_,
715                       options->low_memory_mode_,
716                       options->long_pause_log_threshold_,
717                       options->long_gc_log_threshold_,
718                       options->ignore_max_footprint_,
719                       options->use_tlab_,
720                       options->verify_pre_gc_heap_,
721                       options->verify_pre_sweeping_heap_,
722                       options->verify_post_gc_heap_,
723                       options->verify_pre_gc_rosalloc_,
724                       options->verify_pre_sweeping_rosalloc_,
725                       options->verify_post_gc_rosalloc_,
726                       options->use_homogeneous_space_compaction_for_oom_,
727                       options->min_interval_homogeneous_space_compaction_by_oom_);
728
729  dump_gc_performance_on_shutdown_ = options->dump_gc_performance_on_shutdown_;
730
731  BlockSignals();
732  InitPlatformSignalHandlers();
733
734  // Change the implicit checks flags based on runtime architecture.
735  switch (kRuntimeISA) {
736    case kArm:
737    case kThumb2:
738    case kX86:
739    case kArm64:
740    case kX86_64:
741      implicit_null_checks_ = true;
742      implicit_so_checks_ = true;
743      break;
744    default:
745      // Keep the defaults.
746      break;
747  }
748
749  if (implicit_null_checks_ || implicit_so_checks_ || implicit_suspend_checks_) {
750    fault_manager.Init();
751
752    // These need to be in a specific order.  The null point check handler must be
753    // after the suspend check and stack overflow check handlers.
754    if (implicit_suspend_checks_) {
755      suspend_handler_ = new SuspensionHandler(&fault_manager);
756    }
757
758    if (implicit_so_checks_) {
759      stack_overflow_handler_ = new StackOverflowHandler(&fault_manager);
760    }
761
762    if (implicit_null_checks_) {
763      null_pointer_handler_ = new NullPointerHandler(&fault_manager);
764    }
765
766    if (kEnableJavaStackTraceHandler) {
767      new JavaStackTraceHandler(&fault_manager);
768    }
769  }
770
771  java_vm_ = new JavaVMExt(this, options.get());
772
773  Thread::Startup();
774
775  // ClassLinker needs an attached thread, but we can't fully attach a thread without creating
776  // objects. We can't supply a thread group yet; it will be fixed later. Since we are the main
777  // thread, we do not get a java peer.
778  Thread* self = Thread::Attach("main", false, nullptr, false);
779  CHECK_EQ(self->GetThreadId(), ThreadList::kMainThreadId);
780  CHECK(self != nullptr);
781
782  // Set us to runnable so tools using a runtime can allocate and GC by default
783  self->TransitionFromSuspendedToRunnable();
784
785  // Now we're attached, we can take the heap locks and validate the heap.
786  GetHeap()->EnableObjectValidation();
787
788  CHECK_GE(GetHeap()->GetContinuousSpaces().size(), 1U);
789  class_linker_ = new ClassLinker(intern_table_);
790  if (GetHeap()->HasImageSpace()) {
791    class_linker_->InitFromImage();
792    if (kIsDebugBuild) {
793      GetHeap()->GetImageSpace()->VerifyImageAllocations();
794    }
795  } else if (!IsCompiler() || !image_dex2oat_enabled_) {
796    std::vector<std::string> dex_filenames;
797    Split(boot_class_path_string_, ':', dex_filenames);
798    std::vector<const DexFile*> boot_class_path;
799    OpenDexFiles(dex_filenames, options->image_, boot_class_path);
800    class_linker_->InitWithoutImage(boot_class_path);
801    // TODO: Should we move the following to InitWithoutImage?
802    SetInstructionSet(kRuntimeISA);
803    for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
804      Runtime::CalleeSaveType type = Runtime::CalleeSaveType(i);
805      if (!HasCalleeSaveMethod(type)) {
806        SetCalleeSaveMethod(CreateCalleeSaveMethod(type), type);
807      }
808    }
809  } else {
810    CHECK(options->boot_class_path_ != nullptr);
811    CHECK_NE(options->boot_class_path_->size(), 0U);
812    class_linker_->InitWithoutImage(*options->boot_class_path_);
813  }
814  CHECK(class_linker_ != nullptr);
815  verifier::MethodVerifier::Init();
816
817  method_trace_ = options->method_trace_;
818  method_trace_file_ = options->method_trace_file_;
819  method_trace_file_size_ = options->method_trace_file_size_;
820
821  profile_output_filename_ = options->profile_output_filename_;
822  profiler_options_ = options->profiler_options_;
823
824  // TODO: move this to just be an Trace::Start argument
825  Trace::SetDefaultClockSource(options->profile_clock_source_);
826
827  if (options->method_trace_) {
828    ScopedThreadStateChange tsc(self, kWaitingForMethodTracingStart);
829    Trace::Start(options->method_trace_file_.c_str(), -1, options->method_trace_file_size_, 0,
830                 false, false, 0);
831  }
832
833  // Pre-allocate an OutOfMemoryError for the double-OOME case.
834  self->ThrowNewException(ThrowLocation(), "Ljava/lang/OutOfMemoryError;",
835                          "OutOfMemoryError thrown while trying to throw OutOfMemoryError; "
836                          "no stack available");
837  pre_allocated_OutOfMemoryError_ = GcRoot<mirror::Throwable>(self->GetException(NULL));
838  self->ClearException();
839
840  // Pre-allocate a NoClassDefFoundError for the common case of failing to find a system class
841  // ahead of checking the application's class loader.
842  self->ThrowNewException(ThrowLocation(), "Ljava/lang/NoClassDefFoundError;",
843                          "Class not found using the boot class loader; no stack available");
844  pre_allocated_NoClassDefFoundError_ = GcRoot<mirror::Throwable>(self->GetException(NULL));
845  self->ClearException();
846
847  // Look for a native bridge.
848  //
849  // The intended flow here is, in the case of a running system:
850  //
851  // Runtime::Init() (zygote):
852  //   LoadNativeBridge -> dlopen from cmd line parameter.
853  //  |
854  //  V
855  // Runtime::Start() (zygote):
856  //   No-op wrt native bridge.
857  //  |
858  //  | start app
859  //  V
860  // DidForkFromZygote(action)
861  //   action = kUnload -> dlclose native bridge.
862  //   action = kInitialize -> initialize library
863  //
864  //
865  // The intended flow here is, in the case of a simple dalvikvm call:
866  //
867  // Runtime::Init():
868  //   LoadNativeBridge -> dlopen from cmd line parameter.
869  //  |
870  //  V
871  // Runtime::Start():
872  //   DidForkFromZygote(kInitialize) -> try to initialize any native bridge given.
873  //   No-op wrt native bridge.
874  native_bridge_library_filename_ = options->native_bridge_library_filename_;
875  LoadNativeBridge(native_bridge_library_filename_);
876
877  VLOG(startup) << "Runtime::Init exiting";
878  return true;
879}
880
881void Runtime::InitNativeMethods() {
882  VLOG(startup) << "Runtime::InitNativeMethods entering";
883  Thread* self = Thread::Current();
884  JNIEnv* env = self->GetJniEnv();
885
886  // Must be in the kNative state for calling native methods (JNI_OnLoad code).
887  CHECK_EQ(self->GetState(), kNative);
888
889  // First set up JniConstants, which is used by both the runtime's built-in native
890  // methods and libcore.
891  JniConstants::init(env);
892  WellKnownClasses::Init(env);
893
894  // Then set up the native methods provided by the runtime itself.
895  RegisterRuntimeNativeMethods(env);
896
897  // Then set up libcore, which is just a regular JNI library with a regular JNI_OnLoad.
898  // Most JNI libraries can just use System.loadLibrary, but libcore can't because it's
899  // the library that implements System.loadLibrary!
900  {
901    std::string mapped_name(StringPrintf(OS_SHARED_LIB_FORMAT_STR, "javacore"));
902    std::string reason;
903    self->TransitionFromSuspendedToRunnable();
904    StackHandleScope<1> hs(self);
905    auto class_loader(hs.NewHandle<mirror::ClassLoader>(nullptr));
906    if (!instance_->java_vm_->LoadNativeLibrary(mapped_name, class_loader, &reason)) {
907      LOG(FATAL) << "LoadNativeLibrary failed for \"" << mapped_name << "\": " << reason;
908    }
909    self->TransitionFromRunnableToSuspended(kNative);
910  }
911
912  // Initialize well known classes that may invoke runtime native methods.
913  WellKnownClasses::LateInit(env);
914
915  VLOG(startup) << "Runtime::InitNativeMethods exiting";
916}
917
918void Runtime::InitThreadGroups(Thread* self) {
919  JNIEnvExt* env = self->GetJniEnv();
920  ScopedJniEnvLocalRefState env_state(env);
921  main_thread_group_ =
922      env->NewGlobalRef(env->GetStaticObjectField(
923          WellKnownClasses::java_lang_ThreadGroup,
924          WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup));
925  CHECK(main_thread_group_ != NULL || IsCompiler());
926  system_thread_group_ =
927      env->NewGlobalRef(env->GetStaticObjectField(
928          WellKnownClasses::java_lang_ThreadGroup,
929          WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup));
930  CHECK(system_thread_group_ != NULL || IsCompiler());
931}
932
933jobject Runtime::GetMainThreadGroup() const {
934  CHECK(main_thread_group_ != NULL || IsCompiler());
935  return main_thread_group_;
936}
937
938jobject Runtime::GetSystemThreadGroup() const {
939  CHECK(system_thread_group_ != NULL || IsCompiler());
940  return system_thread_group_;
941}
942
943jobject Runtime::GetSystemClassLoader() const {
944  CHECK(system_class_loader_ != NULL || IsCompiler());
945  return system_class_loader_;
946}
947
948void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) {
949#define REGISTER(FN) extern void FN(JNIEnv*); FN(env)
950  // Register Throwable first so that registration of other native methods can throw exceptions
951  REGISTER(register_java_lang_Throwable);
952  REGISTER(register_dalvik_system_DexFile);
953  REGISTER(register_dalvik_system_VMDebug);
954  REGISTER(register_dalvik_system_VMRuntime);
955  REGISTER(register_dalvik_system_VMStack);
956  REGISTER(register_dalvik_system_ZygoteHooks);
957  REGISTER(register_java_lang_Class);
958  REGISTER(register_java_lang_DexCache);
959  REGISTER(register_java_lang_Object);
960  REGISTER(register_java_lang_Runtime);
961  REGISTER(register_java_lang_String);
962  REGISTER(register_java_lang_System);
963  REGISTER(register_java_lang_Thread);
964  REGISTER(register_java_lang_VMClassLoader);
965  REGISTER(register_java_lang_ref_FinalizerReference);
966  REGISTER(register_java_lang_ref_Reference);
967  REGISTER(register_java_lang_reflect_Array);
968  REGISTER(register_java_lang_reflect_Constructor);
969  REGISTER(register_java_lang_reflect_Field);
970  REGISTER(register_java_lang_reflect_Method);
971  REGISTER(register_java_lang_reflect_Proxy);
972  REGISTER(register_java_util_concurrent_atomic_AtomicLong);
973  REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmServer);
974  REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmVmInternal);
975  REGISTER(register_sun_misc_Unsafe);
976#undef REGISTER
977}
978
979void Runtime::DumpForSigQuit(std::ostream& os) {
980  GetClassLinker()->DumpForSigQuit(os);
981  GetInternTable()->DumpForSigQuit(os);
982  GetJavaVM()->DumpForSigQuit(os);
983  GetHeap()->DumpForSigQuit(os);
984  TrackedAllocators::Dump(os);
985  os << "\n";
986
987  thread_list_->DumpForSigQuit(os);
988  BaseMutex::DumpAll(os);
989}
990
991void Runtime::DumpLockHolders(std::ostream& os) {
992  uint64_t mutator_lock_owner = Locks::mutator_lock_->GetExclusiveOwnerTid();
993  pid_t thread_list_lock_owner = GetThreadList()->GetLockOwner();
994  pid_t classes_lock_owner = GetClassLinker()->GetClassesLockOwner();
995  pid_t dex_lock_owner = GetClassLinker()->GetDexLockOwner();
996  if ((thread_list_lock_owner | classes_lock_owner | dex_lock_owner) != 0) {
997    os << "Mutator lock exclusive owner tid: " << mutator_lock_owner << "\n"
998       << "ThreadList lock owner tid: " << thread_list_lock_owner << "\n"
999       << "ClassLinker classes lock owner tid: " << classes_lock_owner << "\n"
1000       << "ClassLinker dex lock owner tid: " << dex_lock_owner << "\n";
1001  }
1002}
1003
1004void Runtime::SetStatsEnabled(bool new_state) {
1005  Thread* self = Thread::Current();
1006  MutexLock mu(self, *Locks::instrument_entrypoints_lock_);
1007  if (new_state == true) {
1008    GetStats()->Clear(~0);
1009    // TODO: wouldn't it make more sense to clear _all_ threads' stats?
1010    self->GetStats()->Clear(~0);
1011    if (stats_enabled_ != new_state) {
1012      GetInstrumentation()->InstrumentQuickAllocEntryPointsLocked();
1013    }
1014  } else if (stats_enabled_ != new_state) {
1015    GetInstrumentation()->UninstrumentQuickAllocEntryPointsLocked();
1016  }
1017  stats_enabled_ = new_state;
1018}
1019
1020void Runtime::ResetStats(int kinds) {
1021  GetStats()->Clear(kinds & 0xffff);
1022  // TODO: wouldn't it make more sense to clear _all_ threads' stats?
1023  Thread::Current()->GetStats()->Clear(kinds >> 16);
1024}
1025
1026int32_t Runtime::GetStat(int kind) {
1027  RuntimeStats* stats;
1028  if (kind < (1<<16)) {
1029    stats = GetStats();
1030  } else {
1031    stats = Thread::Current()->GetStats();
1032    kind >>= 16;
1033  }
1034  switch (kind) {
1035  case KIND_ALLOCATED_OBJECTS:
1036    return stats->allocated_objects;
1037  case KIND_ALLOCATED_BYTES:
1038    return stats->allocated_bytes;
1039  case KIND_FREED_OBJECTS:
1040    return stats->freed_objects;
1041  case KIND_FREED_BYTES:
1042    return stats->freed_bytes;
1043  case KIND_GC_INVOCATIONS:
1044    return stats->gc_for_alloc_count;
1045  case KIND_CLASS_INIT_COUNT:
1046    return stats->class_init_count;
1047  case KIND_CLASS_INIT_TIME:
1048    // Convert ns to us, reduce to 32 bits.
1049    return static_cast<int>(stats->class_init_time_ns / 1000);
1050  case KIND_EXT_ALLOCATED_OBJECTS:
1051  case KIND_EXT_ALLOCATED_BYTES:
1052  case KIND_EXT_FREED_OBJECTS:
1053  case KIND_EXT_FREED_BYTES:
1054    return 0;  // backward compatibility
1055  default:
1056    LOG(FATAL) << "Unknown statistic " << kind;
1057    return -1;  // unreachable
1058  }
1059}
1060
1061void Runtime::BlockSignals() {
1062  SignalSet signals;
1063  signals.Add(SIGPIPE);
1064  // SIGQUIT is used to dump the runtime's state (including stack traces).
1065  signals.Add(SIGQUIT);
1066  // SIGUSR1 is used to initiate a GC.
1067  signals.Add(SIGUSR1);
1068  signals.Block();
1069}
1070
1071bool Runtime::AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group,
1072                                  bool create_peer) {
1073  return Thread::Attach(thread_name, as_daemon, thread_group, create_peer) != NULL;
1074}
1075
1076void Runtime::DetachCurrentThread() {
1077  Thread* self = Thread::Current();
1078  if (self == NULL) {
1079    LOG(FATAL) << "attempting to detach thread that is not attached";
1080  }
1081  if (self->HasManagedStack()) {
1082    LOG(FATAL) << *Thread::Current() << " attempting to detach while still running code";
1083  }
1084  thread_list_->Unregister(self);
1085}
1086
1087mirror::Throwable* Runtime::GetPreAllocatedOutOfMemoryError() {
1088  mirror::Throwable* oome = pre_allocated_OutOfMemoryError_.Read();
1089  if (oome == nullptr) {
1090    LOG(ERROR) << "Failed to return pre-allocated OOME";
1091  }
1092  return oome;
1093}
1094
1095mirror::Throwable* Runtime::GetPreAllocatedNoClassDefFoundError() {
1096  mirror::Throwable* ncdfe = pre_allocated_NoClassDefFoundError_.Read();
1097  if (ncdfe == nullptr) {
1098    LOG(ERROR) << "Failed to return pre-allocated NoClassDefFoundError";
1099  }
1100  return ncdfe;
1101}
1102
1103void Runtime::VisitConstantRoots(RootCallback* callback, void* arg) {
1104  // Visit the classes held as static in mirror classes, these can be visited concurrently and only
1105  // need to be visited once per GC since they never change.
1106  mirror::ArtField::VisitRoots(callback, arg);
1107  mirror::ArtMethod::VisitRoots(callback, arg);
1108  mirror::Class::VisitRoots(callback, arg);
1109  mirror::Reference::VisitRoots(callback, arg);
1110  mirror::StackTraceElement::VisitRoots(callback, arg);
1111  mirror::String::VisitRoots(callback, arg);
1112  mirror::Throwable::VisitRoots(callback, arg);
1113  // Visit all the primitive array types classes.
1114  mirror::PrimitiveArray<uint8_t>::VisitRoots(callback, arg);   // BooleanArray
1115  mirror::PrimitiveArray<int8_t>::VisitRoots(callback, arg);    // ByteArray
1116  mirror::PrimitiveArray<uint16_t>::VisitRoots(callback, arg);  // CharArray
1117  mirror::PrimitiveArray<double>::VisitRoots(callback, arg);    // DoubleArray
1118  mirror::PrimitiveArray<float>::VisitRoots(callback, arg);     // FloatArray
1119  mirror::PrimitiveArray<int32_t>::VisitRoots(callback, arg);   // IntArray
1120  mirror::PrimitiveArray<int64_t>::VisitRoots(callback, arg);   // LongArray
1121  mirror::PrimitiveArray<int16_t>::VisitRoots(callback, arg);   // ShortArray
1122}
1123
1124void Runtime::VisitConcurrentRoots(RootCallback* callback, void* arg, VisitRootFlags flags) {
1125  intern_table_->VisitRoots(callback, arg, flags);
1126  class_linker_->VisitRoots(callback, arg, flags);
1127  if ((flags & kVisitRootFlagNewRoots) == 0) {
1128    // Guaranteed to have no new roots in the constant roots.
1129    VisitConstantRoots(callback, arg);
1130  }
1131}
1132
1133void Runtime::VisitNonThreadRoots(RootCallback* callback, void* arg) {
1134  java_vm_->VisitRoots(callback, arg);
1135  if (!pre_allocated_OutOfMemoryError_.IsNull()) {
1136    pre_allocated_OutOfMemoryError_.VisitRoot(callback, arg, 0, kRootVMInternal);
1137    DCHECK(!pre_allocated_OutOfMemoryError_.IsNull());
1138  }
1139  resolution_method_.VisitRoot(callback, arg, 0, kRootVMInternal);
1140  DCHECK(!resolution_method_.IsNull());
1141  if (!pre_allocated_NoClassDefFoundError_.IsNull()) {
1142    pre_allocated_NoClassDefFoundError_.VisitRoot(callback, arg, 0, kRootVMInternal);
1143    DCHECK(!pre_allocated_NoClassDefFoundError_.IsNull());
1144  }
1145  if (HasImtConflictMethod()) {
1146    imt_conflict_method_.VisitRoot(callback, arg, 0, kRootVMInternal);
1147  }
1148  if (HasDefaultImt()) {
1149    default_imt_.VisitRoot(callback, arg, 0, kRootVMInternal);
1150  }
1151  for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
1152    if (!callee_save_methods_[i].IsNull()) {
1153      callee_save_methods_[i].VisitRoot(callback, arg, 0, kRootVMInternal);
1154    }
1155  }
1156  verifier::MethodVerifier::VisitStaticRoots(callback, arg);
1157  {
1158    MutexLock mu(Thread::Current(), method_verifier_lock_);
1159    for (verifier::MethodVerifier* verifier : method_verifiers_) {
1160      verifier->VisitRoots(callback, arg);
1161    }
1162  }
1163  if (preinitialization_transaction_ != nullptr) {
1164    preinitialization_transaction_->VisitRoots(callback, arg);
1165  }
1166  instrumentation_.VisitRoots(callback, arg);
1167}
1168
1169void Runtime::VisitNonConcurrentRoots(RootCallback* callback, void* arg) {
1170  thread_list_->VisitRoots(callback, arg);
1171  VisitNonThreadRoots(callback, arg);
1172}
1173
1174void Runtime::VisitRoots(RootCallback* callback, void* arg, VisitRootFlags flags) {
1175  VisitNonConcurrentRoots(callback, arg);
1176  VisitConcurrentRoots(callback, arg, flags);
1177}
1178
1179mirror::ObjectArray<mirror::ArtMethod>* Runtime::CreateDefaultImt(ClassLinker* cl) {
1180  Thread* self = Thread::Current();
1181  StackHandleScope<1> hs(self);
1182  Handle<mirror::ObjectArray<mirror::ArtMethod>> imtable(
1183      hs.NewHandle(cl->AllocArtMethodArray(self, 64)));
1184  mirror::ArtMethod* imt_conflict_method = Runtime::Current()->GetImtConflictMethod();
1185  for (size_t i = 0; i < static_cast<size_t>(imtable->GetLength()); i++) {
1186    imtable->Set<false>(i, imt_conflict_method);
1187  }
1188  return imtable.Get();
1189}
1190
1191mirror::ArtMethod* Runtime::CreateImtConflictMethod() {
1192  Thread* self = Thread::Current();
1193  Runtime* runtime = Runtime::Current();
1194  ClassLinker* class_linker = runtime->GetClassLinker();
1195  StackHandleScope<1> hs(self);
1196  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1197  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1198  // TODO: use a special method for imt conflict method saves.
1199  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1200  // When compiling, the code pointer will get set later when the image is loaded.
1201  if (runtime->IsCompiler()) {
1202#if defined(ART_USE_PORTABLE_COMPILER)
1203    method->SetEntryPointFromPortableCompiledCode(nullptr);
1204#endif
1205    method->SetEntryPointFromQuickCompiledCode(nullptr);
1206  } else {
1207#if defined(ART_USE_PORTABLE_COMPILER)
1208    method->SetEntryPointFromPortableCompiledCode(class_linker->GetPortableImtConflictTrampoline());
1209#endif
1210    method->SetEntryPointFromQuickCompiledCode(class_linker->GetQuickImtConflictTrampoline());
1211  }
1212  return method.Get();
1213}
1214
1215mirror::ArtMethod* Runtime::CreateResolutionMethod() {
1216  Thread* self = Thread::Current();
1217  Runtime* runtime = Runtime::Current();
1218  ClassLinker* class_linker = runtime->GetClassLinker();
1219  StackHandleScope<1> hs(self);
1220  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1221  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1222  // TODO: use a special method for resolution method saves
1223  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1224  // When compiling, the code pointer will get set later when the image is loaded.
1225  if (runtime->IsCompiler()) {
1226#if defined(ART_USE_PORTABLE_COMPILER)
1227    method->SetEntryPointFromPortableCompiledCode(nullptr);
1228#endif
1229    method->SetEntryPointFromQuickCompiledCode(nullptr);
1230  } else {
1231#if defined(ART_USE_PORTABLE_COMPILER)
1232    method->SetEntryPointFromPortableCompiledCode(class_linker->GetPortableResolutionTrampoline());
1233#endif
1234    method->SetEntryPointFromQuickCompiledCode(class_linker->GetQuickResolutionTrampoline());
1235  }
1236  return method.Get();
1237}
1238
1239mirror::ArtMethod* Runtime::CreateCalleeSaveMethod(CalleeSaveType type) {
1240  Thread* self = Thread::Current();
1241  Runtime* runtime = Runtime::Current();
1242  ClassLinker* class_linker = runtime->GetClassLinker();
1243  StackHandleScope<1> hs(self);
1244  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1245  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1246  // TODO: use a special method for callee saves
1247  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1248#if defined(ART_USE_PORTABLE_COMPILER)
1249  method->SetEntryPointFromPortableCompiledCode(nullptr);
1250#endif
1251  method->SetEntryPointFromQuickCompiledCode(nullptr);
1252  DCHECK_NE(instruction_set_, kNone);
1253  return method.Get();
1254}
1255
1256void Runtime::DisallowNewSystemWeaks() {
1257  monitor_list_->DisallowNewMonitors();
1258  intern_table_->DisallowNewInterns();
1259  java_vm_->DisallowNewWeakGlobals();
1260}
1261
1262void Runtime::AllowNewSystemWeaks() {
1263  monitor_list_->AllowNewMonitors();
1264  intern_table_->AllowNewInterns();
1265  java_vm_->AllowNewWeakGlobals();
1266}
1267
1268void Runtime::SetInstructionSet(InstructionSet instruction_set) {
1269  instruction_set_ = instruction_set;
1270  if ((instruction_set_ == kThumb2) || (instruction_set_ == kArm)) {
1271    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1272      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1273      callee_save_method_frame_infos_[i] = arm::ArmCalleeSaveMethodFrameInfo(type);
1274    }
1275  } else if (instruction_set_ == kMips) {
1276    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1277      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1278      callee_save_method_frame_infos_[i] = mips::MipsCalleeSaveMethodFrameInfo(type);
1279    }
1280  } else if (instruction_set_ == kX86) {
1281    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1282      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1283      callee_save_method_frame_infos_[i] = x86::X86CalleeSaveMethodFrameInfo(type);
1284    }
1285  } else if (instruction_set_ == kX86_64) {
1286    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1287      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1288      callee_save_method_frame_infos_[i] = x86_64::X86_64CalleeSaveMethodFrameInfo(type);
1289    }
1290  } else if (instruction_set_ == kArm64) {
1291    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1292      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1293      callee_save_method_frame_infos_[i] = arm64::Arm64CalleeSaveMethodFrameInfo(type);
1294    }
1295  } else {
1296    UNIMPLEMENTED(FATAL) << instruction_set_;
1297  }
1298}
1299
1300void Runtime::SetCalleeSaveMethod(mirror::ArtMethod* method, CalleeSaveType type) {
1301  DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastCalleeSaveType));
1302  callee_save_methods_[type] = GcRoot<mirror::ArtMethod>(method);
1303}
1304
1305const std::vector<const DexFile*>& Runtime::GetCompileTimeClassPath(jobject class_loader) {
1306  if (class_loader == NULL) {
1307    return GetClassLinker()->GetBootClassPath();
1308  }
1309  CHECK(UseCompileTimeClassPath());
1310  CompileTimeClassPaths::const_iterator it = compile_time_class_paths_.find(class_loader);
1311  CHECK(it != compile_time_class_paths_.end());
1312  return it->second;
1313}
1314
1315void Runtime::SetCompileTimeClassPath(jobject class_loader,
1316                                      std::vector<const DexFile*>& class_path) {
1317  CHECK(!IsStarted());
1318  use_compile_time_class_path_ = true;
1319  compile_time_class_paths_.Put(class_loader, class_path);
1320}
1321
1322void Runtime::AddMethodVerifier(verifier::MethodVerifier* verifier) {
1323  DCHECK(verifier != nullptr);
1324  MutexLock mu(Thread::Current(), method_verifier_lock_);
1325  method_verifiers_.insert(verifier);
1326}
1327
1328void Runtime::RemoveMethodVerifier(verifier::MethodVerifier* verifier) {
1329  DCHECK(verifier != nullptr);
1330  MutexLock mu(Thread::Current(), method_verifier_lock_);
1331  auto it = method_verifiers_.find(verifier);
1332  CHECK(it != method_verifiers_.end());
1333  method_verifiers_.erase(it);
1334}
1335
1336void Runtime::StartProfiler(const char* profile_output_filename) {
1337  profile_output_filename_ = profile_output_filename;
1338  profiler_started_ =
1339    BackgroundMethodSamplingProfiler::Start(profile_output_filename_, profiler_options_);
1340}
1341
1342// Transaction support.
1343void Runtime::EnterTransactionMode(Transaction* transaction) {
1344  DCHECK(IsCompiler());
1345  DCHECK(transaction != nullptr);
1346  DCHECK(!IsActiveTransaction());
1347  preinitialization_transaction_ = transaction;
1348}
1349
1350void Runtime::ExitTransactionMode() {
1351  DCHECK(IsCompiler());
1352  DCHECK(IsActiveTransaction());
1353  preinitialization_transaction_ = nullptr;
1354}
1355
1356void Runtime::RecordWriteField32(mirror::Object* obj, MemberOffset field_offset,
1357                                 uint32_t value, bool is_volatile) const {
1358  DCHECK(IsCompiler());
1359  DCHECK(IsActiveTransaction());
1360  preinitialization_transaction_->RecordWriteField32(obj, field_offset, value, is_volatile);
1361}
1362
1363void Runtime::RecordWriteField64(mirror::Object* obj, MemberOffset field_offset,
1364                                 uint64_t value, bool is_volatile) const {
1365  DCHECK(IsCompiler());
1366  DCHECK(IsActiveTransaction());
1367  preinitialization_transaction_->RecordWriteField64(obj, field_offset, value, is_volatile);
1368}
1369
1370void Runtime::RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset,
1371                                        mirror::Object* value, bool is_volatile) const {
1372  DCHECK(IsCompiler());
1373  DCHECK(IsActiveTransaction());
1374  preinitialization_transaction_->RecordWriteFieldReference(obj, field_offset, value, is_volatile);
1375}
1376
1377void Runtime::RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const {
1378  DCHECK(IsCompiler());
1379  DCHECK(IsActiveTransaction());
1380  preinitialization_transaction_->RecordWriteArray(array, index, value);
1381}
1382
1383void Runtime::RecordStrongStringInsertion(mirror::String* s) const {
1384  DCHECK(IsCompiler());
1385  DCHECK(IsActiveTransaction());
1386  preinitialization_transaction_->RecordStrongStringInsertion(s);
1387}
1388
1389void Runtime::RecordWeakStringInsertion(mirror::String* s) const {
1390  DCHECK(IsCompiler());
1391  DCHECK(IsActiveTransaction());
1392  preinitialization_transaction_->RecordWeakStringInsertion(s);
1393}
1394
1395void Runtime::RecordStrongStringRemoval(mirror::String* s) const {
1396  DCHECK(IsCompiler());
1397  DCHECK(IsActiveTransaction());
1398  preinitialization_transaction_->RecordStrongStringRemoval(s);
1399}
1400
1401void Runtime::RecordWeakStringRemoval(mirror::String* s) const {
1402  DCHECK(IsCompiler());
1403  DCHECK(IsActiveTransaction());
1404  preinitialization_transaction_->RecordWeakStringRemoval(s);
1405}
1406
1407void Runtime::SetFaultMessage(const std::string& message) {
1408  MutexLock mu(Thread::Current(), fault_message_lock_);
1409  fault_message_ = message;
1410}
1411
1412void Runtime::AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* argv)
1413    const {
1414  if (GetInstrumentation()->InterpretOnly()) {
1415    argv->push_back("--compiler-filter=interpret-only");
1416  }
1417
1418  // Make the dex2oat instruction set match that of the launching runtime. If we have multiple
1419  // architecture support, dex2oat may be compiled as a different instruction-set than that
1420  // currently being executed.
1421  std::string instruction_set("--instruction-set=");
1422  instruction_set += GetInstructionSetString(kRuntimeISA);
1423  argv->push_back(instruction_set);
1424
1425  std::string features("--instruction-set-features=");
1426  features += GetDefaultInstructionSetFeatures();
1427  argv->push_back(features);
1428}
1429
1430void Runtime::UpdateProfilerState(int state) {
1431  VLOG(profiler) << "Profiler state updated to " << state;
1432}
1433}  // namespace art
1434