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 "sigchain.h"
76#include "signal_catcher.h"
77#include "signal_set.h"
78#include "handle_scope-inl.h"
79#include "thread.h"
80#include "thread_list.h"
81#include "trace.h"
82#include "transaction.h"
83#include "profiler.h"
84#include "verifier/method_verifier.h"
85#include "well_known_classes.h"
86
87#include "JniConstants.h"  // Last to avoid LOG redefinition in ics-mr1-plus-art.
88
89#ifdef HAVE_ANDROID_OS
90#include "cutils/properties.h"
91#endif
92
93namespace art {
94
95static constexpr bool kEnableJavaStackTraceHandler = false;
96const char* Runtime::kDefaultInstructionSetFeatures =
97    STRINGIFY(ART_DEFAULT_INSTRUCTION_SET_FEATURES);
98Runtime* Runtime::instance_ = NULL;
99
100Runtime::Runtime()
101    : instruction_set_(kNone),
102      compiler_callbacks_(nullptr),
103      is_zygote_(false),
104      must_relocate_(false),
105      is_concurrent_gc_enabled_(true),
106      is_explicit_gc_disabled_(false),
107      dex2oat_enabled_(true),
108      image_dex2oat_enabled_(true),
109      default_stack_size_(0),
110      heap_(nullptr),
111      max_spins_before_thin_lock_inflation_(Monitor::kDefaultMaxSpinsBeforeThinLockInflation),
112      monitor_list_(nullptr),
113      monitor_pool_(nullptr),
114      thread_list_(nullptr),
115      intern_table_(nullptr),
116      class_linker_(nullptr),
117      signal_catcher_(nullptr),
118      java_vm_(nullptr),
119      fault_message_lock_("Fault message lock"),
120      fault_message_(""),
121      method_verifier_lock_("Method verifiers lock"),
122      threads_being_born_(0),
123      shutdown_cond_(new ConditionVariable("Runtime shutdown", *Locks::runtime_shutdown_lock_)),
124      shutting_down_(false),
125      shutting_down_started_(false),
126      started_(false),
127      finished_starting_(false),
128      vfprintf_(nullptr),
129      exit_(nullptr),
130      abort_(nullptr),
131      stats_enabled_(false),
132      running_on_valgrind_(RUNNING_ON_VALGRIND > 0),
133      profiler_started_(false),
134      method_trace_(false),
135      method_trace_file_size_(0),
136      instrumentation_(),
137      use_compile_time_class_path_(false),
138      main_thread_group_(nullptr),
139      system_thread_group_(nullptr),
140      system_class_loader_(nullptr),
141      dump_gc_performance_on_shutdown_(false),
142      preinitialization_transaction_(nullptr),
143      null_pointer_handler_(nullptr),
144      suspend_handler_(nullptr),
145      stack_overflow_handler_(nullptr),
146      verify_(false),
147      target_sdk_version_(0),
148      implicit_null_checks_(false),
149      implicit_so_checks_(false),
150      implicit_suspend_checks_(false) {
151}
152
153Runtime::~Runtime() {
154  if (dump_gc_performance_on_shutdown_) {
155    // This can't be called from the Heap destructor below because it
156    // could call RosAlloc::InspectAll() which needs the thread_list
157    // to be still alive.
158    heap_->DumpGcPerformanceInfo(LOG(INFO));
159  }
160
161  Thread* self = Thread::Current();
162  {
163    MutexLock mu(self, *Locks::runtime_shutdown_lock_);
164    shutting_down_started_ = true;
165    while (threads_being_born_ > 0) {
166      shutdown_cond_->Wait(self);
167    }
168    shutting_down_ = true;
169  }
170  // Shut down background profiler before the runtime exits.
171  if (profiler_started_) {
172    BackgroundMethodSamplingProfiler::Shutdown();
173  }
174
175  // Shutdown the fault manager if it was initialized.
176  fault_manager.Shutdown();
177
178  Trace::Shutdown();
179
180  // Make sure to let the GC complete if it is running.
181  heap_->WaitForGcToComplete(gc::kGcCauseBackground, self);
182  heap_->DeleteThreadPool();
183
184  // Make sure our internal threads are dead before we start tearing down things they're using.
185  Dbg::StopJdwp();
186  delete signal_catcher_;
187
188  // Make sure all other non-daemon threads have terminated, and all daemon threads are suspended.
189  delete thread_list_;
190  delete monitor_list_;
191  delete monitor_pool_;
192  delete class_linker_;
193  delete heap_;
194  delete intern_table_;
195  delete java_vm_;
196  Thread::Shutdown();
197  QuasiAtomic::Shutdown();
198  verifier::MethodVerifier::Shutdown();
199  MemMap::Shutdown();
200  // TODO: acquire a static mutex on Runtime to avoid racing.
201  CHECK(instance_ == nullptr || instance_ == this);
202  instance_ = nullptr;
203
204  delete null_pointer_handler_;
205  delete suspend_handler_;
206  delete stack_overflow_handler_;
207}
208
209struct AbortState {
210  void Dump(std::ostream& os) NO_THREAD_SAFETY_ANALYSIS {
211    if (gAborting > 1) {
212      os << "Runtime aborting --- recursively, so no thread-specific detail!\n";
213      return;
214    }
215    gAborting++;
216    os << "Runtime aborting...\n";
217    if (Runtime::Current() == NULL) {
218      os << "(Runtime does not yet exist!)\n";
219      return;
220    }
221    Thread* self = Thread::Current();
222    if (self == nullptr) {
223      os << "(Aborting thread was not attached to runtime!)\n";
224      DumpKernelStack(os, GetTid(), "  kernel: ", false);
225      DumpNativeStack(os, GetTid(), "  native: ", nullptr);
226    } else {
227      os << "Aborting thread:\n";
228      if (Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)) {
229        DumpThread(os, self);
230      } else {
231        if (Locks::mutator_lock_->SharedTryLock(self)) {
232          DumpThread(os, self);
233          Locks::mutator_lock_->SharedUnlock(self);
234        }
235      }
236    }
237    DumpAllThreads(os, self);
238  }
239
240  void DumpThread(std::ostream& os, Thread* self) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
241    self->Dump(os);
242    if (self->IsExceptionPending()) {
243      ThrowLocation throw_location;
244      mirror::Throwable* exception = self->GetException(&throw_location);
245      os << "Pending exception " << PrettyTypeOf(exception)
246          << " thrown by '" << throw_location.Dump() << "'\n"
247          << exception->Dump();
248    }
249  }
250
251  void DumpAllThreads(std::ostream& os, Thread* self) NO_THREAD_SAFETY_ANALYSIS {
252    Runtime* runtime = Runtime::Current();
253    if (runtime != nullptr) {
254      ThreadList* thread_list = runtime->GetThreadList();
255      if (thread_list != nullptr) {
256        bool tll_already_held = Locks::thread_list_lock_->IsExclusiveHeld(self);
257        bool ml_already_held = Locks::mutator_lock_->IsSharedHeld(self);
258        if (!tll_already_held || !ml_already_held) {
259          os << "Dumping all threads without appropriate locks held:"
260              << (!tll_already_held ? " thread list lock" : "")
261              << (!ml_already_held ? " mutator lock" : "")
262              << "\n";
263        }
264        os << "All threads:\n";
265        thread_list->DumpLocked(os);
266      }
267    }
268  }
269};
270
271void Runtime::Abort() {
272  gAborting++;  // set before taking any locks
273
274  // Ensure that we don't have multiple threads trying to abort at once,
275  // which would result in significantly worse diagnostics.
276  MutexLock mu(Thread::Current(), *Locks::abort_lock_);
277
278  // Get any pending output out of the way.
279  fflush(NULL);
280
281  // Many people have difficulty distinguish aborts from crashes,
282  // so be explicit.
283  AbortState state;
284  LOG(INTERNAL_FATAL) << Dumpable<AbortState>(state);
285
286  // Call the abort hook if we have one.
287  if (Runtime::Current() != NULL && Runtime::Current()->abort_ != NULL) {
288    LOG(INTERNAL_FATAL) << "Calling abort hook...";
289    Runtime::Current()->abort_();
290    // notreached
291    LOG(INTERNAL_FATAL) << "Unexpectedly returned from abort hook!";
292  }
293
294#if defined(__GLIBC__)
295  // TODO: we ought to be able to use pthread_kill(3) here (or abort(3),
296  // which POSIX defines in terms of raise(3), which POSIX defines in terms
297  // of pthread_kill(3)). On Linux, though, libcorkscrew can't unwind through
298  // libpthread, which means the stacks we dump would be useless. Calling
299  // tgkill(2) directly avoids that.
300  syscall(__NR_tgkill, getpid(), GetTid(), SIGABRT);
301  // TODO: LLVM installs it's own SIGABRT handler so exit to be safe... Can we disable that in LLVM?
302  // If not, we could use sigaction(3) before calling tgkill(2) and lose this call to exit(3).
303  exit(1);
304#else
305  abort();
306#endif
307  // notreached
308}
309
310void Runtime::PreZygoteFork() {
311  heap_->PreZygoteFork();
312}
313
314void Runtime::CallExitHook(jint status) {
315  if (exit_ != NULL) {
316    ScopedThreadStateChange tsc(Thread::Current(), kNative);
317    exit_(status);
318    LOG(WARNING) << "Exit hook returned instead of exiting!";
319  }
320}
321
322void Runtime::SweepSystemWeaks(IsMarkedCallback* visitor, void* arg) {
323  GetInternTable()->SweepInternTableWeaks(visitor, arg);
324  GetMonitorList()->SweepMonitorList(visitor, arg);
325  GetJavaVM()->SweepJniWeakGlobals(visitor, arg);
326}
327
328bool Runtime::Create(const RuntimeOptions& options, bool ignore_unrecognized) {
329  // TODO: acquire a static mutex on Runtime to avoid racing.
330  if (Runtime::instance_ != NULL) {
331    return false;
332  }
333  InitLogging(NULL);  // Calls Locks::Init() as a side effect.
334  instance_ = new Runtime;
335  if (!instance_->Init(options, ignore_unrecognized)) {
336    delete instance_;
337    instance_ = NULL;
338    return false;
339  }
340  return true;
341}
342
343jobject CreateSystemClassLoader() {
344  if (Runtime::Current()->UseCompileTimeClassPath()) {
345    return NULL;
346  }
347
348  ScopedObjectAccess soa(Thread::Current());
349  ClassLinker* cl = Runtime::Current()->GetClassLinker();
350
351  StackHandleScope<3> hs(soa.Self());
352  Handle<mirror::Class> class_loader_class(
353      hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_ClassLoader)));
354  CHECK(cl->EnsureInitialized(class_loader_class, true, true));
355
356  mirror::ArtMethod* getSystemClassLoader =
357      class_loader_class->FindDirectMethod("getSystemClassLoader", "()Ljava/lang/ClassLoader;");
358  CHECK(getSystemClassLoader != NULL);
359
360  JValue result = InvokeWithJValues(soa, nullptr, soa.EncodeMethod(getSystemClassLoader), nullptr);
361  Handle<mirror::ClassLoader> class_loader(
362      hs.NewHandle(down_cast<mirror::ClassLoader*>(result.GetL())));
363  CHECK(class_loader.Get() != nullptr);
364  JNIEnv* env = soa.Self()->GetJniEnv();
365  ScopedLocalRef<jobject> system_class_loader(env,
366                                              soa.AddLocalReference<jobject>(class_loader.Get()));
367  CHECK(system_class_loader.get() != nullptr);
368
369  soa.Self()->SetClassLoaderOverride(class_loader.Get());
370
371  Handle<mirror::Class> thread_class(
372      hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_Thread)));
373  CHECK(cl->EnsureInitialized(thread_class, true, true));
374
375  mirror::ArtField* contextClassLoader =
376      thread_class->FindDeclaredInstanceField("contextClassLoader", "Ljava/lang/ClassLoader;");
377  CHECK(contextClassLoader != NULL);
378
379  // We can't run in a transaction yet.
380  contextClassLoader->SetObject<false>(soa.Self()->GetPeer(), class_loader.Get());
381
382  return env->NewGlobalRef(system_class_loader.get());
383}
384
385std::string Runtime::GetPatchoatExecutable() const {
386  if (!patchoat_executable_.empty()) {
387    return patchoat_executable_;
388  }
389  std::string patchoat_executable_(GetAndroidRoot());
390  patchoat_executable_ += (kIsDebugBuild ? "/bin/patchoatd" : "/bin/patchoat");
391  return patchoat_executable_;
392}
393
394std::string Runtime::GetCompilerExecutable() const {
395  if (!compiler_executable_.empty()) {
396    return compiler_executable_;
397  }
398  std::string compiler_executable(GetAndroidRoot());
399  compiler_executable += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat");
400  return compiler_executable;
401}
402
403bool Runtime::Start() {
404  VLOG(startup) << "Runtime::Start entering";
405
406  // Restore main thread state to kNative as expected by native code.
407  Thread* self = Thread::Current();
408
409  self->TransitionFromRunnableToSuspended(kNative);
410
411  started_ = true;
412
413  if (!IsImageDex2OatEnabled() || !Runtime::Current()->GetHeap()->HasImageSpace()) {
414    ScopedObjectAccess soa(Thread::Current());
415    StackHandleScope<1> hs(soa.Self());
416    auto klass(hs.NewHandle<mirror::Class>(mirror::Class::GetJavaLangClass()));
417    class_linker_->EnsureInitialized(klass, true, true);
418  }
419
420  // InitNativeMethods needs to be after started_ so that the classes
421  // it touches will have methods linked to the oat file if necessary.
422  InitNativeMethods();
423
424  // Initialize well known thread group values that may be accessed threads while attaching.
425  InitThreadGroups(self);
426
427  Thread::FinishStartup();
428
429  system_class_loader_ = CreateSystemClassLoader();
430
431  if (is_zygote_) {
432    if (!InitZygote()) {
433      return false;
434    }
435  } else {
436    bool have_native_bridge = !native_bridge_library_filename_.empty();
437    if (have_native_bridge) {
438      PreInitializeNativeBridge(".");
439    }
440    DidForkFromZygote(self->GetJniEnv(), have_native_bridge ? NativeBridgeAction::kInitialize :
441        NativeBridgeAction::kUnload, GetInstructionSetString(kRuntimeISA));
442  }
443
444  StartDaemonThreads();
445
446  {
447    ScopedObjectAccess soa(self);
448    self->GetJniEnv()->locals.AssertEmpty();
449  }
450
451  VLOG(startup) << "Runtime::Start exiting";
452  finished_starting_ = true;
453
454  if (profiler_options_.IsEnabled() && !profile_output_filename_.empty()) {
455    // User has asked for a profile using -Xenable-profiler.
456    // Create the profile file if it doesn't exist.
457    int fd = open(profile_output_filename_.c_str(), O_RDWR|O_CREAT|O_EXCL, 0660);
458    if (fd >= 0) {
459      close(fd);
460    } else if (errno != EEXIST) {
461      LOG(INFO) << "Failed to access the profile file. Profiler disabled.";
462      return true;
463    }
464    StartProfiler(profile_output_filename_.c_str());
465  }
466
467  return true;
468}
469
470void Runtime::EndThreadBirth() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) {
471  DCHECK_GT(threads_being_born_, 0U);
472  threads_being_born_--;
473  if (shutting_down_started_ && threads_being_born_ == 0) {
474    shutdown_cond_->Broadcast(Thread::Current());
475  }
476}
477
478// Do zygote-mode-only initialization.
479bool Runtime::InitZygote() {
480#ifdef __linux__
481  // zygote goes into its own process group
482  setpgid(0, 0);
483
484  // See storage config details at http://source.android.com/tech/storage/
485  // Create private mount namespace shared by all children
486  if (unshare(CLONE_NEWNS) == -1) {
487    PLOG(WARNING) << "Failed to unshare()";
488    return false;
489  }
490
491  // Mark rootfs as being a slave so that changes from default
492  // namespace only flow into our children.
493  if (mount("rootfs", "/", NULL, (MS_SLAVE | MS_REC), NULL) == -1) {
494    PLOG(WARNING) << "Failed to mount() rootfs as MS_SLAVE";
495    return false;
496  }
497
498  // Create a staging tmpfs that is shared by our children; they will
499  // bind mount storage into their respective private namespaces, which
500  // are isolated from each other.
501  const char* target_base = getenv("EMULATED_STORAGE_TARGET");
502  if (target_base != NULL) {
503    if (mount("tmpfs", target_base, "tmpfs", MS_NOSUID | MS_NODEV,
504              "uid=0,gid=1028,mode=0751") == -1) {
505      LOG(WARNING) << "Failed to mount tmpfs to " << target_base;
506      return false;
507    }
508  }
509
510  return true;
511#else
512  UNIMPLEMENTED(FATAL);
513  return false;
514#endif
515}
516
517void Runtime::DidForkFromZygote(JNIEnv* env, NativeBridgeAction action, const char* isa) {
518  is_zygote_ = false;
519
520  switch (action) {
521    case NativeBridgeAction::kUnload:
522      UnloadNativeBridge();
523      break;
524
525    case NativeBridgeAction::kInitialize:
526      InitializeNativeBridge(env, isa);
527      break;
528  }
529
530  // Create the thread pool.
531  heap_->CreateThreadPool();
532
533  StartSignalCatcher();
534
535  // Start the JDWP thread. If the command-line debugger flags specified "suspend=y",
536  // this will pause the runtime, so we probably want this to come last.
537  Dbg::StartJdwp();
538}
539
540void Runtime::StartSignalCatcher() {
541  if (!is_zygote_) {
542    signal_catcher_ = new SignalCatcher(stack_trace_file_);
543  }
544}
545
546bool Runtime::IsShuttingDown(Thread* self) {
547  MutexLock mu(self, *Locks::runtime_shutdown_lock_);
548  return IsShuttingDownLocked();
549}
550
551void Runtime::StartDaemonThreads() {
552  VLOG(startup) << "Runtime::StartDaemonThreads entering";
553
554  Thread* self = Thread::Current();
555
556  // Must be in the kNative state for calling native methods.
557  CHECK_EQ(self->GetState(), kNative);
558
559  JNIEnv* env = self->GetJniEnv();
560  env->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons,
561                            WellKnownClasses::java_lang_Daemons_start);
562  if (env->ExceptionCheck()) {
563    env->ExceptionDescribe();
564    LOG(FATAL) << "Error starting java.lang.Daemons";
565  }
566
567  VLOG(startup) << "Runtime::StartDaemonThreads exiting";
568}
569
570static bool OpenDexFilesFromImage(const std::vector<std::string>& dex_filenames,
571                                  const std::string& image_location,
572                                  std::vector<const DexFile*>& dex_files,
573                                  size_t* failures) {
574  std::string system_filename;
575  bool has_system = false;
576  std::string cache_filename_unused;
577  bool dalvik_cache_exists_unused;
578  bool has_cache_unused;
579  bool is_global_cache_unused;
580  bool found_image = gc::space::ImageSpace::FindImageFilename(image_location.c_str(),
581                                                              kRuntimeISA,
582                                                              &system_filename,
583                                                              &has_system,
584                                                              &cache_filename_unused,
585                                                              &dalvik_cache_exists_unused,
586                                                              &has_cache_unused,
587                                                              &is_global_cache_unused);
588  *failures = 0;
589  if (!found_image || !has_system) {
590    return false;
591  }
592  std::string error_msg;
593  // We are falling back to non-executable use of the oat file because patching failed, presumably
594  // due to lack of space.
595  std::string oat_filename = ImageHeader::GetOatLocationFromImageLocation(system_filename.c_str());
596  std::string oat_location = ImageHeader::GetOatLocationFromImageLocation(image_location.c_str());
597  std::unique_ptr<File> file(OS::OpenFileForReading(oat_filename.c_str()));
598  if (file.get() == nullptr) {
599    return false;
600  }
601  std::unique_ptr<ElfFile> elf_file(ElfFile::Open(file.release(), false, false, &error_msg));
602  if (elf_file.get() == nullptr) {
603    return false;
604  }
605  std::unique_ptr<OatFile> oat_file(OatFile::OpenWithElfFile(elf_file.release(), oat_location,
606                                                             &error_msg));
607  if (oat_file.get() == nullptr) {
608    LOG(INFO) << "Unable to use '" << oat_filename << "' because " << error_msg;
609    return false;
610  }
611
612  for (const OatFile::OatDexFile* oat_dex_file : oat_file->GetOatDexFiles()) {
613    if (oat_dex_file == nullptr) {
614      *failures += 1;
615      continue;
616    }
617    const DexFile* dex_file = oat_dex_file->OpenDexFile(&error_msg);
618    if (dex_file == nullptr) {
619      *failures += 1;
620    } else {
621      dex_files.push_back(dex_file);
622    }
623  }
624  Runtime::Current()->GetClassLinker()->RegisterOatFile(oat_file.release());
625  return true;
626}
627
628
629static size_t OpenDexFiles(const std::vector<std::string>& dex_filenames,
630                           const std::string& image_location,
631                           std::vector<const DexFile*>& dex_files) {
632  size_t failure_count = 0;
633  if (!image_location.empty() && OpenDexFilesFromImage(dex_filenames, image_location, dex_files,
634                                                       &failure_count)) {
635    return failure_count;
636  }
637  failure_count = 0;
638  for (size_t i = 0; i < dex_filenames.size(); i++) {
639    const char* dex_filename = dex_filenames[i].c_str();
640    std::string error_msg;
641    if (!OS::FileExists(dex_filename)) {
642      LOG(WARNING) << "Skipping non-existent dex file '" << dex_filename << "'";
643      continue;
644    }
645    if (!DexFile::Open(dex_filename, dex_filename, &error_msg, &dex_files)) {
646      LOG(WARNING) << "Failed to open .dex from file '" << dex_filename << "': " << error_msg;
647      ++failure_count;
648    }
649  }
650  return failure_count;
651}
652
653bool Runtime::Init(const RuntimeOptions& raw_options, bool ignore_unrecognized) {
654  CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize);
655
656  MemMap::Init();
657
658  std::unique_ptr<ParsedOptions> options(ParsedOptions::Create(raw_options, ignore_unrecognized));
659  if (options.get() == nullptr) {
660    LOG(ERROR) << "Failed to parse options";
661    return false;
662  }
663  VLOG(startup) << "Runtime::Init -verbose:startup enabled";
664
665  QuasiAtomic::Startup();
666
667  Monitor::Init(options->lock_profiling_threshold_, options->hook_is_sensitive_thread_);
668
669  boot_class_path_string_ = options->boot_class_path_string_;
670  class_path_string_ = options->class_path_string_;
671  properties_ = options->properties_;
672
673  compiler_callbacks_ = options->compiler_callbacks_;
674  patchoat_executable_ = options->patchoat_executable_;
675  must_relocate_ = options->must_relocate_;
676  is_zygote_ = options->is_zygote_;
677  is_explicit_gc_disabled_ = options->is_explicit_gc_disabled_;
678  dex2oat_enabled_ = options->dex2oat_enabled_;
679  image_dex2oat_enabled_ = options->image_dex2oat_enabled_;
680
681  vfprintf_ = options->hook_vfprintf_;
682  exit_ = options->hook_exit_;
683  abort_ = options->hook_abort_;
684
685  default_stack_size_ = options->stack_size_;
686  stack_trace_file_ = options->stack_trace_file_;
687
688  compiler_executable_ = options->compiler_executable_;
689  compiler_options_ = options->compiler_options_;
690  image_compiler_options_ = options->image_compiler_options_;
691  image_location_ = options->image_;
692
693  max_spins_before_thin_lock_inflation_ = options->max_spins_before_thin_lock_inflation_;
694
695  monitor_list_ = new MonitorList;
696  monitor_pool_ = MonitorPool::Create();
697  thread_list_ = new ThreadList;
698  intern_table_ = new InternTable;
699
700  verify_ = options->verify_;
701
702  if (options->interpreter_only_) {
703    GetInstrumentation()->ForceInterpretOnly();
704  }
705
706  heap_ = new gc::Heap(options->heap_initial_size_,
707                       options->heap_growth_limit_,
708                       options->heap_min_free_,
709                       options->heap_max_free_,
710                       options->heap_target_utilization_,
711                       options->foreground_heap_growth_multiplier_,
712                       options->heap_maximum_size_,
713                       options->heap_non_moving_space_capacity_,
714                       options->image_,
715                       options->image_isa_,
716                       options->collector_type_,
717                       options->background_collector_type_,
718                       options->parallel_gc_threads_,
719                       options->conc_gc_threads_,
720                       options->low_memory_mode_,
721                       options->long_pause_log_threshold_,
722                       options->long_gc_log_threshold_,
723                       options->ignore_max_footprint_,
724                       options->use_tlab_,
725                       options->verify_pre_gc_heap_,
726                       options->verify_pre_sweeping_heap_,
727                       options->verify_post_gc_heap_,
728                       options->verify_pre_gc_rosalloc_,
729                       options->verify_pre_sweeping_rosalloc_,
730                       options->verify_post_gc_rosalloc_,
731                       options->use_homogeneous_space_compaction_for_oom_,
732                       options->min_interval_homogeneous_space_compaction_by_oom_);
733
734  dump_gc_performance_on_shutdown_ = options->dump_gc_performance_on_shutdown_;
735
736  BlockSignals();
737  InitPlatformSignalHandlers();
738
739  // Change the implicit checks flags based on runtime architecture.
740  switch (kRuntimeISA) {
741    case kArm:
742    case kThumb2:
743    case kX86:
744    case kArm64:
745    case kX86_64:
746      implicit_null_checks_ = true;
747      implicit_so_checks_ = true;
748      break;
749    default:
750      // Keep the defaults.
751      break;
752  }
753
754  // Always initialize the signal chain so that any calls to sigaction get
755  // correctly routed to the next in the chain regardless of whether we
756  // have claimed the signal or not.
757  InitializeSignalChain();
758
759  if (implicit_null_checks_ || implicit_so_checks_ || implicit_suspend_checks_) {
760    fault_manager.Init();
761
762    // These need to be in a specific order.  The null point check handler must be
763    // after the suspend check and stack overflow check handlers.
764    if (implicit_suspend_checks_) {
765      suspend_handler_ = new SuspensionHandler(&fault_manager);
766    }
767
768    if (implicit_so_checks_) {
769      stack_overflow_handler_ = new StackOverflowHandler(&fault_manager);
770    }
771
772    if (implicit_null_checks_) {
773      null_pointer_handler_ = new NullPointerHandler(&fault_manager);
774    }
775
776    if (kEnableJavaStackTraceHandler) {
777      new JavaStackTraceHandler(&fault_manager);
778    }
779  }
780
781  java_vm_ = new JavaVMExt(this, options.get());
782
783  Thread::Startup();
784
785  // ClassLinker needs an attached thread, but we can't fully attach a thread without creating
786  // objects. We can't supply a thread group yet; it will be fixed later. Since we are the main
787  // thread, we do not get a java peer.
788  Thread* self = Thread::Attach("main", false, nullptr, false);
789  CHECK_EQ(self->GetThreadId(), ThreadList::kMainThreadId);
790  CHECK(self != nullptr);
791
792  // Set us to runnable so tools using a runtime can allocate and GC by default
793  self->TransitionFromSuspendedToRunnable();
794
795  // Now we're attached, we can take the heap locks and validate the heap.
796  GetHeap()->EnableObjectValidation();
797
798  CHECK_GE(GetHeap()->GetContinuousSpaces().size(), 1U);
799  class_linker_ = new ClassLinker(intern_table_);
800  if (GetHeap()->HasImageSpace()) {
801    class_linker_->InitFromImage();
802    if (kIsDebugBuild) {
803      GetHeap()->GetImageSpace()->VerifyImageAllocations();
804    }
805  } else if (!IsCompiler() || !image_dex2oat_enabled_) {
806    std::vector<std::string> dex_filenames;
807    Split(boot_class_path_string_, ':', dex_filenames);
808    std::vector<const DexFile*> boot_class_path;
809    OpenDexFiles(dex_filenames, options->image_, boot_class_path);
810    class_linker_->InitWithoutImage(boot_class_path);
811    // TODO: Should we move the following to InitWithoutImage?
812    SetInstructionSet(kRuntimeISA);
813    for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
814      Runtime::CalleeSaveType type = Runtime::CalleeSaveType(i);
815      if (!HasCalleeSaveMethod(type)) {
816        SetCalleeSaveMethod(CreateCalleeSaveMethod(type), type);
817      }
818    }
819  } else {
820    CHECK(options->boot_class_path_ != nullptr);
821    CHECK_NE(options->boot_class_path_->size(), 0U);
822    class_linker_->InitWithoutImage(*options->boot_class_path_);
823  }
824  CHECK(class_linker_ != nullptr);
825  verifier::MethodVerifier::Init();
826
827  method_trace_ = options->method_trace_;
828  method_trace_file_ = options->method_trace_file_;
829  method_trace_file_size_ = options->method_trace_file_size_;
830
831  profile_output_filename_ = options->profile_output_filename_;
832  profiler_options_ = options->profiler_options_;
833
834  // TODO: move this to just be an Trace::Start argument
835  Trace::SetDefaultClockSource(options->profile_clock_source_);
836
837  if (options->method_trace_) {
838    ScopedThreadStateChange tsc(self, kWaitingForMethodTracingStart);
839    Trace::Start(options->method_trace_file_.c_str(), -1, options->method_trace_file_size_, 0,
840                 false, false, 0);
841  }
842
843  // Pre-allocate an OutOfMemoryError for the double-OOME case.
844  self->ThrowNewException(ThrowLocation(), "Ljava/lang/OutOfMemoryError;",
845                          "OutOfMemoryError thrown while trying to throw OutOfMemoryError; "
846                          "no stack available");
847  pre_allocated_OutOfMemoryError_ = GcRoot<mirror::Throwable>(self->GetException(NULL));
848  self->ClearException();
849
850  // Pre-allocate a NoClassDefFoundError for the common case of failing to find a system class
851  // ahead of checking the application's class loader.
852  self->ThrowNewException(ThrowLocation(), "Ljava/lang/NoClassDefFoundError;",
853                          "Class not found using the boot class loader; no stack available");
854  pre_allocated_NoClassDefFoundError_ = GcRoot<mirror::Throwable>(self->GetException(NULL));
855  self->ClearException();
856
857  // Look for a native bridge.
858  //
859  // The intended flow here is, in the case of a running system:
860  //
861  // Runtime::Init() (zygote):
862  //   LoadNativeBridge -> dlopen from cmd line parameter.
863  //  |
864  //  V
865  // Runtime::Start() (zygote):
866  //   No-op wrt native bridge.
867  //  |
868  //  | start app
869  //  V
870  // DidForkFromZygote(action)
871  //   action = kUnload -> dlclose native bridge.
872  //   action = kInitialize -> initialize library
873  //
874  //
875  // The intended flow here is, in the case of a simple dalvikvm call:
876  //
877  // Runtime::Init():
878  //   LoadNativeBridge -> dlopen from cmd line parameter.
879  //  |
880  //  V
881  // Runtime::Start():
882  //   DidForkFromZygote(kInitialize) -> try to initialize any native bridge given.
883  //   No-op wrt native bridge.
884  native_bridge_library_filename_ = options->native_bridge_library_filename_;
885  LoadNativeBridge(native_bridge_library_filename_);
886
887  VLOG(startup) << "Runtime::Init exiting";
888  return true;
889}
890
891void Runtime::InitNativeMethods() {
892  VLOG(startup) << "Runtime::InitNativeMethods entering";
893  Thread* self = Thread::Current();
894  JNIEnv* env = self->GetJniEnv();
895
896  // Must be in the kNative state for calling native methods (JNI_OnLoad code).
897  CHECK_EQ(self->GetState(), kNative);
898
899  // First set up JniConstants, which is used by both the runtime's built-in native
900  // methods and libcore.
901  JniConstants::init(env);
902  WellKnownClasses::Init(env);
903
904  // Then set up the native methods provided by the runtime itself.
905  RegisterRuntimeNativeMethods(env);
906
907  // Then set up libcore, which is just a regular JNI library with a regular JNI_OnLoad.
908  // Most JNI libraries can just use System.loadLibrary, but libcore can't because it's
909  // the library that implements System.loadLibrary!
910  {
911    std::string mapped_name(StringPrintf(OS_SHARED_LIB_FORMAT_STR, "javacore"));
912    std::string reason;
913    self->TransitionFromSuspendedToRunnable();
914    StackHandleScope<1> hs(self);
915    auto class_loader(hs.NewHandle<mirror::ClassLoader>(nullptr));
916    if (!instance_->java_vm_->LoadNativeLibrary(mapped_name, class_loader, &reason)) {
917      LOG(FATAL) << "LoadNativeLibrary failed for \"" << mapped_name << "\": " << reason;
918    }
919    self->TransitionFromRunnableToSuspended(kNative);
920  }
921
922  // Initialize well known classes that may invoke runtime native methods.
923  WellKnownClasses::LateInit(env);
924
925  VLOG(startup) << "Runtime::InitNativeMethods exiting";
926}
927
928void Runtime::InitThreadGroups(Thread* self) {
929  JNIEnvExt* env = self->GetJniEnv();
930  ScopedJniEnvLocalRefState env_state(env);
931  main_thread_group_ =
932      env->NewGlobalRef(env->GetStaticObjectField(
933          WellKnownClasses::java_lang_ThreadGroup,
934          WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup));
935  CHECK(main_thread_group_ != NULL || IsCompiler());
936  system_thread_group_ =
937      env->NewGlobalRef(env->GetStaticObjectField(
938          WellKnownClasses::java_lang_ThreadGroup,
939          WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup));
940  CHECK(system_thread_group_ != NULL || IsCompiler());
941}
942
943jobject Runtime::GetMainThreadGroup() const {
944  CHECK(main_thread_group_ != NULL || IsCompiler());
945  return main_thread_group_;
946}
947
948jobject Runtime::GetSystemThreadGroup() const {
949  CHECK(system_thread_group_ != NULL || IsCompiler());
950  return system_thread_group_;
951}
952
953jobject Runtime::GetSystemClassLoader() const {
954  CHECK(system_class_loader_ != NULL || IsCompiler());
955  return system_class_loader_;
956}
957
958void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) {
959#define REGISTER(FN) extern void FN(JNIEnv*); FN(env)
960  // Register Throwable first so that registration of other native methods can throw exceptions
961  REGISTER(register_java_lang_Throwable);
962  REGISTER(register_dalvik_system_DexFile);
963  REGISTER(register_dalvik_system_VMDebug);
964  REGISTER(register_dalvik_system_VMRuntime);
965  REGISTER(register_dalvik_system_VMStack);
966  REGISTER(register_dalvik_system_ZygoteHooks);
967  REGISTER(register_java_lang_Class);
968  REGISTER(register_java_lang_DexCache);
969  REGISTER(register_java_lang_Object);
970  REGISTER(register_java_lang_Runtime);
971  REGISTER(register_java_lang_String);
972  REGISTER(register_java_lang_System);
973  REGISTER(register_java_lang_Thread);
974  REGISTER(register_java_lang_VMClassLoader);
975  REGISTER(register_java_lang_ref_FinalizerReference);
976  REGISTER(register_java_lang_ref_Reference);
977  REGISTER(register_java_lang_reflect_Array);
978  REGISTER(register_java_lang_reflect_Constructor);
979  REGISTER(register_java_lang_reflect_Field);
980  REGISTER(register_java_lang_reflect_Method);
981  REGISTER(register_java_lang_reflect_Proxy);
982  REGISTER(register_java_util_concurrent_atomic_AtomicLong);
983  REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmServer);
984  REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmVmInternal);
985  REGISTER(register_sun_misc_Unsafe);
986#undef REGISTER
987}
988
989void Runtime::DumpForSigQuit(std::ostream& os) {
990  GetClassLinker()->DumpForSigQuit(os);
991  GetInternTable()->DumpForSigQuit(os);
992  GetJavaVM()->DumpForSigQuit(os);
993  GetHeap()->DumpForSigQuit(os);
994  TrackedAllocators::Dump(os);
995  os << "\n";
996
997  thread_list_->DumpForSigQuit(os);
998  BaseMutex::DumpAll(os);
999}
1000
1001void Runtime::DumpLockHolders(std::ostream& os) {
1002  uint64_t mutator_lock_owner = Locks::mutator_lock_->GetExclusiveOwnerTid();
1003  pid_t thread_list_lock_owner = GetThreadList()->GetLockOwner();
1004  pid_t classes_lock_owner = GetClassLinker()->GetClassesLockOwner();
1005  pid_t dex_lock_owner = GetClassLinker()->GetDexLockOwner();
1006  if ((thread_list_lock_owner | classes_lock_owner | dex_lock_owner) != 0) {
1007    os << "Mutator lock exclusive owner tid: " << mutator_lock_owner << "\n"
1008       << "ThreadList lock owner tid: " << thread_list_lock_owner << "\n"
1009       << "ClassLinker classes lock owner tid: " << classes_lock_owner << "\n"
1010       << "ClassLinker dex lock owner tid: " << dex_lock_owner << "\n";
1011  }
1012}
1013
1014void Runtime::SetStatsEnabled(bool new_state) {
1015  Thread* self = Thread::Current();
1016  MutexLock mu(self, *Locks::instrument_entrypoints_lock_);
1017  if (new_state == true) {
1018    GetStats()->Clear(~0);
1019    // TODO: wouldn't it make more sense to clear _all_ threads' stats?
1020    self->GetStats()->Clear(~0);
1021    if (stats_enabled_ != new_state) {
1022      GetInstrumentation()->InstrumentQuickAllocEntryPointsLocked();
1023    }
1024  } else if (stats_enabled_ != new_state) {
1025    GetInstrumentation()->UninstrumentQuickAllocEntryPointsLocked();
1026  }
1027  stats_enabled_ = new_state;
1028}
1029
1030void Runtime::ResetStats(int kinds) {
1031  GetStats()->Clear(kinds & 0xffff);
1032  // TODO: wouldn't it make more sense to clear _all_ threads' stats?
1033  Thread::Current()->GetStats()->Clear(kinds >> 16);
1034}
1035
1036int32_t Runtime::GetStat(int kind) {
1037  RuntimeStats* stats;
1038  if (kind < (1<<16)) {
1039    stats = GetStats();
1040  } else {
1041    stats = Thread::Current()->GetStats();
1042    kind >>= 16;
1043  }
1044  switch (kind) {
1045  case KIND_ALLOCATED_OBJECTS:
1046    return stats->allocated_objects;
1047  case KIND_ALLOCATED_BYTES:
1048    return stats->allocated_bytes;
1049  case KIND_FREED_OBJECTS:
1050    return stats->freed_objects;
1051  case KIND_FREED_BYTES:
1052    return stats->freed_bytes;
1053  case KIND_GC_INVOCATIONS:
1054    return stats->gc_for_alloc_count;
1055  case KIND_CLASS_INIT_COUNT:
1056    return stats->class_init_count;
1057  case KIND_CLASS_INIT_TIME:
1058    // Convert ns to us, reduce to 32 bits.
1059    return static_cast<int>(stats->class_init_time_ns / 1000);
1060  case KIND_EXT_ALLOCATED_OBJECTS:
1061  case KIND_EXT_ALLOCATED_BYTES:
1062  case KIND_EXT_FREED_OBJECTS:
1063  case KIND_EXT_FREED_BYTES:
1064    return 0;  // backward compatibility
1065  default:
1066    LOG(FATAL) << "Unknown statistic " << kind;
1067    return -1;  // unreachable
1068  }
1069}
1070
1071void Runtime::BlockSignals() {
1072  SignalSet signals;
1073  signals.Add(SIGPIPE);
1074  // SIGQUIT is used to dump the runtime's state (including stack traces).
1075  signals.Add(SIGQUIT);
1076  // SIGUSR1 is used to initiate a GC.
1077  signals.Add(SIGUSR1);
1078  signals.Block();
1079}
1080
1081bool Runtime::AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group,
1082                                  bool create_peer) {
1083  return Thread::Attach(thread_name, as_daemon, thread_group, create_peer) != NULL;
1084}
1085
1086void Runtime::DetachCurrentThread() {
1087  Thread* self = Thread::Current();
1088  if (self == NULL) {
1089    LOG(FATAL) << "attempting to detach thread that is not attached";
1090  }
1091  if (self->HasManagedStack()) {
1092    LOG(FATAL) << *Thread::Current() << " attempting to detach while still running code";
1093  }
1094  thread_list_->Unregister(self);
1095}
1096
1097mirror::Throwable* Runtime::GetPreAllocatedOutOfMemoryError() {
1098  mirror::Throwable* oome = pre_allocated_OutOfMemoryError_.Read();
1099  if (oome == nullptr) {
1100    LOG(ERROR) << "Failed to return pre-allocated OOME";
1101  }
1102  return oome;
1103}
1104
1105mirror::Throwable* Runtime::GetPreAllocatedNoClassDefFoundError() {
1106  mirror::Throwable* ncdfe = pre_allocated_NoClassDefFoundError_.Read();
1107  if (ncdfe == nullptr) {
1108    LOG(ERROR) << "Failed to return pre-allocated NoClassDefFoundError";
1109  }
1110  return ncdfe;
1111}
1112
1113void Runtime::VisitConstantRoots(RootCallback* callback, void* arg) {
1114  // Visit the classes held as static in mirror classes, these can be visited concurrently and only
1115  // need to be visited once per GC since they never change.
1116  mirror::ArtField::VisitRoots(callback, arg);
1117  mirror::ArtMethod::VisitRoots(callback, arg);
1118  mirror::Class::VisitRoots(callback, arg);
1119  mirror::Reference::VisitRoots(callback, arg);
1120  mirror::StackTraceElement::VisitRoots(callback, arg);
1121  mirror::String::VisitRoots(callback, arg);
1122  mirror::Throwable::VisitRoots(callback, arg);
1123  // Visit all the primitive array types classes.
1124  mirror::PrimitiveArray<uint8_t>::VisitRoots(callback, arg);   // BooleanArray
1125  mirror::PrimitiveArray<int8_t>::VisitRoots(callback, arg);    // ByteArray
1126  mirror::PrimitiveArray<uint16_t>::VisitRoots(callback, arg);  // CharArray
1127  mirror::PrimitiveArray<double>::VisitRoots(callback, arg);    // DoubleArray
1128  mirror::PrimitiveArray<float>::VisitRoots(callback, arg);     // FloatArray
1129  mirror::PrimitiveArray<int32_t>::VisitRoots(callback, arg);   // IntArray
1130  mirror::PrimitiveArray<int64_t>::VisitRoots(callback, arg);   // LongArray
1131  mirror::PrimitiveArray<int16_t>::VisitRoots(callback, arg);   // ShortArray
1132}
1133
1134void Runtime::VisitConcurrentRoots(RootCallback* callback, void* arg, VisitRootFlags flags) {
1135  intern_table_->VisitRoots(callback, arg, flags);
1136  class_linker_->VisitRoots(callback, arg, flags);
1137  if ((flags & kVisitRootFlagNewRoots) == 0) {
1138    // Guaranteed to have no new roots in the constant roots.
1139    VisitConstantRoots(callback, arg);
1140  }
1141}
1142
1143void Runtime::VisitNonThreadRoots(RootCallback* callback, void* arg) {
1144  java_vm_->VisitRoots(callback, arg);
1145  if (!pre_allocated_OutOfMemoryError_.IsNull()) {
1146    pre_allocated_OutOfMemoryError_.VisitRoot(callback, arg, 0, kRootVMInternal);
1147    DCHECK(!pre_allocated_OutOfMemoryError_.IsNull());
1148  }
1149  resolution_method_.VisitRoot(callback, arg, 0, kRootVMInternal);
1150  DCHECK(!resolution_method_.IsNull());
1151  if (!pre_allocated_NoClassDefFoundError_.IsNull()) {
1152    pre_allocated_NoClassDefFoundError_.VisitRoot(callback, arg, 0, kRootVMInternal);
1153    DCHECK(!pre_allocated_NoClassDefFoundError_.IsNull());
1154  }
1155  if (HasImtConflictMethod()) {
1156    imt_conflict_method_.VisitRoot(callback, arg, 0, kRootVMInternal);
1157  }
1158  if (HasDefaultImt()) {
1159    default_imt_.VisitRoot(callback, arg, 0, kRootVMInternal);
1160  }
1161  for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
1162    if (!callee_save_methods_[i].IsNull()) {
1163      callee_save_methods_[i].VisitRoot(callback, arg, 0, kRootVMInternal);
1164    }
1165  }
1166  verifier::MethodVerifier::VisitStaticRoots(callback, arg);
1167  {
1168    MutexLock mu(Thread::Current(), method_verifier_lock_);
1169    for (verifier::MethodVerifier* verifier : method_verifiers_) {
1170      verifier->VisitRoots(callback, arg);
1171    }
1172  }
1173  if (preinitialization_transaction_ != nullptr) {
1174    preinitialization_transaction_->VisitRoots(callback, arg);
1175  }
1176  instrumentation_.VisitRoots(callback, arg);
1177}
1178
1179void Runtime::VisitNonConcurrentRoots(RootCallback* callback, void* arg) {
1180  thread_list_->VisitRoots(callback, arg);
1181  VisitNonThreadRoots(callback, arg);
1182}
1183
1184void Runtime::VisitRoots(RootCallback* callback, void* arg, VisitRootFlags flags) {
1185  VisitNonConcurrentRoots(callback, arg);
1186  VisitConcurrentRoots(callback, arg, flags);
1187}
1188
1189mirror::ObjectArray<mirror::ArtMethod>* Runtime::CreateDefaultImt(ClassLinker* cl) {
1190  Thread* self = Thread::Current();
1191  StackHandleScope<1> hs(self);
1192  Handle<mirror::ObjectArray<mirror::ArtMethod>> imtable(
1193      hs.NewHandle(cl->AllocArtMethodArray(self, 64)));
1194  mirror::ArtMethod* imt_conflict_method = Runtime::Current()->GetImtConflictMethod();
1195  for (size_t i = 0; i < static_cast<size_t>(imtable->GetLength()); i++) {
1196    imtable->Set<false>(i, imt_conflict_method);
1197  }
1198  return imtable.Get();
1199}
1200
1201mirror::ArtMethod* Runtime::CreateImtConflictMethod() {
1202  Thread* self = Thread::Current();
1203  Runtime* runtime = Runtime::Current();
1204  ClassLinker* class_linker = runtime->GetClassLinker();
1205  StackHandleScope<1> hs(self);
1206  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1207  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1208  // TODO: use a special method for imt conflict method saves.
1209  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1210  // When compiling, the code pointer will get set later when the image is loaded.
1211  if (runtime->IsCompiler()) {
1212#if defined(ART_USE_PORTABLE_COMPILER)
1213    method->SetEntryPointFromPortableCompiledCode(nullptr);
1214#endif
1215    method->SetEntryPointFromQuickCompiledCode(nullptr);
1216  } else {
1217#if defined(ART_USE_PORTABLE_COMPILER)
1218    method->SetEntryPointFromPortableCompiledCode(class_linker->GetPortableImtConflictTrampoline());
1219#endif
1220    method->SetEntryPointFromQuickCompiledCode(class_linker->GetQuickImtConflictTrampoline());
1221  }
1222  return method.Get();
1223}
1224
1225mirror::ArtMethod* Runtime::CreateResolutionMethod() {
1226  Thread* self = Thread::Current();
1227  Runtime* runtime = Runtime::Current();
1228  ClassLinker* class_linker = runtime->GetClassLinker();
1229  StackHandleScope<1> hs(self);
1230  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1231  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1232  // TODO: use a special method for resolution method saves
1233  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1234  // When compiling, the code pointer will get set later when the image is loaded.
1235  if (runtime->IsCompiler()) {
1236#if defined(ART_USE_PORTABLE_COMPILER)
1237    method->SetEntryPointFromPortableCompiledCode(nullptr);
1238#endif
1239    method->SetEntryPointFromQuickCompiledCode(nullptr);
1240  } else {
1241#if defined(ART_USE_PORTABLE_COMPILER)
1242    method->SetEntryPointFromPortableCompiledCode(class_linker->GetPortableResolutionTrampoline());
1243#endif
1244    method->SetEntryPointFromQuickCompiledCode(class_linker->GetQuickResolutionTrampoline());
1245  }
1246  return method.Get();
1247}
1248
1249mirror::ArtMethod* Runtime::CreateCalleeSaveMethod(CalleeSaveType type) {
1250  Thread* self = Thread::Current();
1251  Runtime* runtime = Runtime::Current();
1252  ClassLinker* class_linker = runtime->GetClassLinker();
1253  StackHandleScope<1> hs(self);
1254  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1255  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1256  // TODO: use a special method for callee saves
1257  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1258#if defined(ART_USE_PORTABLE_COMPILER)
1259  method->SetEntryPointFromPortableCompiledCode(nullptr);
1260#endif
1261  method->SetEntryPointFromQuickCompiledCode(nullptr);
1262  DCHECK_NE(instruction_set_, kNone);
1263  return method.Get();
1264}
1265
1266void Runtime::DisallowNewSystemWeaks() {
1267  monitor_list_->DisallowNewMonitors();
1268  intern_table_->DisallowNewInterns();
1269  java_vm_->DisallowNewWeakGlobals();
1270}
1271
1272void Runtime::AllowNewSystemWeaks() {
1273  monitor_list_->AllowNewMonitors();
1274  intern_table_->AllowNewInterns();
1275  java_vm_->AllowNewWeakGlobals();
1276}
1277
1278void Runtime::SetInstructionSet(InstructionSet instruction_set) {
1279  instruction_set_ = instruction_set;
1280  if ((instruction_set_ == kThumb2) || (instruction_set_ == kArm)) {
1281    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1282      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1283      callee_save_method_frame_infos_[i] = arm::ArmCalleeSaveMethodFrameInfo(type);
1284    }
1285  } else if (instruction_set_ == kMips) {
1286    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1287      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1288      callee_save_method_frame_infos_[i] = mips::MipsCalleeSaveMethodFrameInfo(type);
1289    }
1290  } else if (instruction_set_ == kX86) {
1291    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1292      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1293      callee_save_method_frame_infos_[i] = x86::X86CalleeSaveMethodFrameInfo(type);
1294    }
1295  } else if (instruction_set_ == kX86_64) {
1296    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1297      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1298      callee_save_method_frame_infos_[i] = x86_64::X86_64CalleeSaveMethodFrameInfo(type);
1299    }
1300  } else if (instruction_set_ == kArm64) {
1301    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1302      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1303      callee_save_method_frame_infos_[i] = arm64::Arm64CalleeSaveMethodFrameInfo(type);
1304    }
1305  } else {
1306    UNIMPLEMENTED(FATAL) << instruction_set_;
1307  }
1308}
1309
1310void Runtime::SetCalleeSaveMethod(mirror::ArtMethod* method, CalleeSaveType type) {
1311  DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastCalleeSaveType));
1312  callee_save_methods_[type] = GcRoot<mirror::ArtMethod>(method);
1313}
1314
1315const std::vector<const DexFile*>& Runtime::GetCompileTimeClassPath(jobject class_loader) {
1316  if (class_loader == NULL) {
1317    return GetClassLinker()->GetBootClassPath();
1318  }
1319  CHECK(UseCompileTimeClassPath());
1320  CompileTimeClassPaths::const_iterator it = compile_time_class_paths_.find(class_loader);
1321  CHECK(it != compile_time_class_paths_.end());
1322  return it->second;
1323}
1324
1325void Runtime::SetCompileTimeClassPath(jobject class_loader,
1326                                      std::vector<const DexFile*>& class_path) {
1327  CHECK(!IsStarted());
1328  use_compile_time_class_path_ = true;
1329  compile_time_class_paths_.Put(class_loader, class_path);
1330}
1331
1332void Runtime::AddMethodVerifier(verifier::MethodVerifier* verifier) {
1333  DCHECK(verifier != nullptr);
1334  MutexLock mu(Thread::Current(), method_verifier_lock_);
1335  method_verifiers_.insert(verifier);
1336}
1337
1338void Runtime::RemoveMethodVerifier(verifier::MethodVerifier* verifier) {
1339  DCHECK(verifier != nullptr);
1340  MutexLock mu(Thread::Current(), method_verifier_lock_);
1341  auto it = method_verifiers_.find(verifier);
1342  CHECK(it != method_verifiers_.end());
1343  method_verifiers_.erase(it);
1344}
1345
1346void Runtime::StartProfiler(const char* profile_output_filename) {
1347  profile_output_filename_ = profile_output_filename;
1348  profiler_started_ =
1349    BackgroundMethodSamplingProfiler::Start(profile_output_filename_, profiler_options_);
1350}
1351
1352// Transaction support.
1353void Runtime::EnterTransactionMode(Transaction* transaction) {
1354  DCHECK(IsCompiler());
1355  DCHECK(transaction != nullptr);
1356  DCHECK(!IsActiveTransaction());
1357  preinitialization_transaction_ = transaction;
1358}
1359
1360void Runtime::ExitTransactionMode() {
1361  DCHECK(IsCompiler());
1362  DCHECK(IsActiveTransaction());
1363  preinitialization_transaction_ = nullptr;
1364}
1365
1366void Runtime::RecordWriteField32(mirror::Object* obj, MemberOffset field_offset,
1367                                 uint32_t value, bool is_volatile) const {
1368  DCHECK(IsCompiler());
1369  DCHECK(IsActiveTransaction());
1370  preinitialization_transaction_->RecordWriteField32(obj, field_offset, value, is_volatile);
1371}
1372
1373void Runtime::RecordWriteField64(mirror::Object* obj, MemberOffset field_offset,
1374                                 uint64_t value, bool is_volatile) const {
1375  DCHECK(IsCompiler());
1376  DCHECK(IsActiveTransaction());
1377  preinitialization_transaction_->RecordWriteField64(obj, field_offset, value, is_volatile);
1378}
1379
1380void Runtime::RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset,
1381                                        mirror::Object* value, bool is_volatile) const {
1382  DCHECK(IsCompiler());
1383  DCHECK(IsActiveTransaction());
1384  preinitialization_transaction_->RecordWriteFieldReference(obj, field_offset, value, is_volatile);
1385}
1386
1387void Runtime::RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const {
1388  DCHECK(IsCompiler());
1389  DCHECK(IsActiveTransaction());
1390  preinitialization_transaction_->RecordWriteArray(array, index, value);
1391}
1392
1393void Runtime::RecordStrongStringInsertion(mirror::String* s) const {
1394  DCHECK(IsCompiler());
1395  DCHECK(IsActiveTransaction());
1396  preinitialization_transaction_->RecordStrongStringInsertion(s);
1397}
1398
1399void Runtime::RecordWeakStringInsertion(mirror::String* s) const {
1400  DCHECK(IsCompiler());
1401  DCHECK(IsActiveTransaction());
1402  preinitialization_transaction_->RecordWeakStringInsertion(s);
1403}
1404
1405void Runtime::RecordStrongStringRemoval(mirror::String* s) const {
1406  DCHECK(IsCompiler());
1407  DCHECK(IsActiveTransaction());
1408  preinitialization_transaction_->RecordStrongStringRemoval(s);
1409}
1410
1411void Runtime::RecordWeakStringRemoval(mirror::String* s) const {
1412  DCHECK(IsCompiler());
1413  DCHECK(IsActiveTransaction());
1414  preinitialization_transaction_->RecordWeakStringRemoval(s);
1415}
1416
1417void Runtime::SetFaultMessage(const std::string& message) {
1418  MutexLock mu(Thread::Current(), fault_message_lock_);
1419  fault_message_ = message;
1420}
1421
1422void Runtime::AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* argv)
1423    const {
1424  if (GetInstrumentation()->InterpretOnly()) {
1425    argv->push_back("--compiler-filter=interpret-only");
1426  }
1427
1428  // Make the dex2oat instruction set match that of the launching runtime. If we have multiple
1429  // architecture support, dex2oat may be compiled as a different instruction-set than that
1430  // currently being executed.
1431  std::string instruction_set("--instruction-set=");
1432  instruction_set += GetInstructionSetString(kRuntimeISA);
1433  argv->push_back(instruction_set);
1434
1435  std::string features("--instruction-set-features=");
1436  features += GetDefaultInstructionSetFeatures();
1437  argv->push_back(features);
1438}
1439
1440void Runtime::UpdateProfilerState(int state) {
1441  VLOG(profiler) << "Profiler state updated to " << state;
1442}
1443}  // namespace art
1444