runtime.cc revision 69dbec6d9d55eeb2867949c2791d01dc9aa916c8 
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      verify_(false),
143      target_sdk_version_(0),
144      implicit_null_checks_(false),
145      implicit_so_checks_(false),
146      implicit_suspend_checks_(false),
147      native_bridge_art_callbacks_({GetMethodShorty, GetNativeMethodCount, GetNativeMethods}) {
148}
149
150Runtime::~Runtime() {
151  if (dump_gc_performance_on_shutdown_) {
152    // This can't be called from the Heap destructor below because it
153    // could call RosAlloc::InspectAll() which needs the thread_list
154    // to be still alive.
155    heap_->DumpGcPerformanceInfo(LOG(INFO));
156  }
157
158  Thread* self = Thread::Current();
159  {
160    MutexLock mu(self, *Locks::runtime_shutdown_lock_);
161    shutting_down_started_ = true;
162    while (threads_being_born_ > 0) {
163      shutdown_cond_->Wait(self);
164    }
165    shutting_down_ = true;
166  }
167  // Shut down background profiler before the runtime exits.
168  if (profiler_started_) {
169    BackgroundMethodSamplingProfiler::Shutdown();
170  }
171
172  // Shutdown the fault manager if it was initialized.
173  fault_manager.Shutdown();
174
175  Trace::Shutdown();
176
177  // Make sure to let the GC complete if it is running.
178  heap_->WaitForGcToComplete(gc::kGcCauseBackground, self);
179  heap_->DeleteThreadPool();
180
181  // Make sure our internal threads are dead before we start tearing down things they're using.
182  Dbg::StopJdwp();
183  delete signal_catcher_;
184
185  // Make sure all other non-daemon threads have terminated, and all daemon threads are suspended.
186  delete thread_list_;
187  delete monitor_list_;
188  delete monitor_pool_;
189  delete class_linker_;
190  delete heap_;
191  delete intern_table_;
192  delete java_vm_;
193  Thread::Shutdown();
194  QuasiAtomic::Shutdown();
195  verifier::MethodVerifier::Shutdown();
196  // TODO: acquire a static mutex on Runtime to avoid racing.
197  CHECK(instance_ == nullptr || instance_ == this);
198  instance_ = nullptr;
199}
200
201struct AbortState {
202  void Dump(std::ostream& os) {
203    if (gAborting > 1) {
204      os << "Runtime aborting --- recursively, so no thread-specific detail!\n";
205      return;
206    }
207    gAborting++;
208    os << "Runtime aborting...\n";
209    if (Runtime::Current() == NULL) {
210      os << "(Runtime does not yet exist!)\n";
211      return;
212    }
213    Thread* self = Thread::Current();
214    if (self == nullptr) {
215      os << "(Aborting thread was not attached to runtime!)\n";
216      DumpKernelStack(os, GetTid(), "  kernel: ", false);
217      DumpNativeStack(os, GetTid(), "  native: ", nullptr);
218    } else {
219      os << "Aborting thread:\n";
220      if (Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self)) {
221        DumpThread(os, self);
222      } else {
223        if (Locks::mutator_lock_->SharedTryLock(self)) {
224          DumpThread(os, self);
225          Locks::mutator_lock_->SharedUnlock(self);
226        }
227      }
228    }
229    DumpAllThreads(os, self);
230  }
231
232  // No thread-safety analysis as we do explicitly test for holding the mutator lock.
233  void DumpThread(std::ostream& os, Thread* self) NO_THREAD_SAFETY_ANALYSIS {
234    DCHECK(Locks::mutator_lock_->IsExclusiveHeld(self) || Locks::mutator_lock_->IsSharedHeld(self));
235    self->Dump(os);
236    if (self->IsExceptionPending()) {
237      ThrowLocation throw_location;
238      mirror::Throwable* exception = self->GetException(&throw_location);
239      os << "Pending exception " << PrettyTypeOf(exception)
240          << " thrown by '" << throw_location.Dump() << "'\n"
241          << exception->Dump();
242    }
243  }
244
245  void DumpAllThreads(std::ostream& os, Thread* self) {
246    Runtime* runtime = Runtime::Current();
247    if (runtime != nullptr) {
248      ThreadList* thread_list = runtime->GetThreadList();
249      if (thread_list != nullptr) {
250        bool tll_already_held = Locks::thread_list_lock_->IsExclusiveHeld(self);
251        bool ml_already_held = Locks::mutator_lock_->IsSharedHeld(self);
252        if (!tll_already_held || !ml_already_held) {
253          os << "Dumping all threads without appropriate locks held:"
254              << (!tll_already_held ? " thread list lock" : "")
255              << (!ml_already_held ? " mutator lock" : "")
256              << "\n";
257        }
258        os << "All threads:\n";
259        thread_list->Dump(os);
260      }
261    }
262  }
263};
264
265void Runtime::Abort() {
266  gAborting++;  // set before taking any locks
267
268  // Ensure that we don't have multiple threads trying to abort at once,
269  // which would result in significantly worse diagnostics.
270  MutexLock mu(Thread::Current(), *Locks::abort_lock_);
271
272  // Get any pending output out of the way.
273  fflush(NULL);
274
275  // Many people have difficulty distinguish aborts from crashes,
276  // so be explicit.
277  AbortState state;
278  LOG(INTERNAL_FATAL) << Dumpable<AbortState>(state);
279
280  // Call the abort hook if we have one.
281  if (Runtime::Current() != NULL && Runtime::Current()->abort_ != NULL) {
282    LOG(INTERNAL_FATAL) << "Calling abort hook...";
283    Runtime::Current()->abort_();
284    // notreached
285    LOG(INTERNAL_FATAL) << "Unexpectedly returned from abort hook!";
286  }
287
288#if defined(__GLIBC__)
289  // TODO: we ought to be able to use pthread_kill(3) here (or abort(3),
290  // which POSIX defines in terms of raise(3), which POSIX defines in terms
291  // of pthread_kill(3)). On Linux, though, libcorkscrew can't unwind through
292  // libpthread, which means the stacks we dump would be useless. Calling
293  // tgkill(2) directly avoids that.
294  syscall(__NR_tgkill, getpid(), GetTid(), SIGABRT);
295  // TODO: LLVM installs it's own SIGABRT handler so exit to be safe... Can we disable that in LLVM?
296  // If not, we could use sigaction(3) before calling tgkill(2) and lose this call to exit(3).
297  exit(1);
298#else
299  abort();
300#endif
301  // notreached
302}
303
304void Runtime::PreZygoteFork() {
305  heap_->PreZygoteFork();
306}
307
308void Runtime::CallExitHook(jint status) {
309  if (exit_ != NULL) {
310    ScopedThreadStateChange tsc(Thread::Current(), kNative);
311    exit_(status);
312    LOG(WARNING) << "Exit hook returned instead of exiting!";
313  }
314}
315
316void Runtime::SweepSystemWeaks(IsMarkedCallback* visitor, void* arg) {
317  GetInternTable()->SweepInternTableWeaks(visitor, arg);
318  GetMonitorList()->SweepMonitorList(visitor, arg);
319  GetJavaVM()->SweepJniWeakGlobals(visitor, arg);
320}
321
322bool Runtime::Create(const RuntimeOptions& options, bool ignore_unrecognized) {
323  // TODO: acquire a static mutex on Runtime to avoid racing.
324  if (Runtime::instance_ != NULL) {
325    return false;
326  }
327  InitLogging(NULL);  // Calls Locks::Init() as a side effect.
328  instance_ = new Runtime;
329  if (!instance_->Init(options, ignore_unrecognized)) {
330    delete instance_;
331    instance_ = NULL;
332    return false;
333  }
334  return true;
335}
336
337jobject CreateSystemClassLoader() {
338  if (Runtime::Current()->UseCompileTimeClassPath()) {
339    return NULL;
340  }
341
342  ScopedObjectAccess soa(Thread::Current());
343  ClassLinker* cl = Runtime::Current()->GetClassLinker();
344
345  StackHandleScope<2> hs(soa.Self());
346  Handle<mirror::Class> class_loader_class(
347      hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_ClassLoader)));
348  CHECK(cl->EnsureInitialized(soa.Self(), class_loader_class, true, true));
349
350  mirror::ArtMethod* getSystemClassLoader =
351      class_loader_class->FindDirectMethod("getSystemClassLoader", "()Ljava/lang/ClassLoader;");
352  CHECK(getSystemClassLoader != NULL);
353
354  JValue result = InvokeWithJValues(soa, nullptr, soa.EncodeMethod(getSystemClassLoader), nullptr);
355  JNIEnv* env = soa.Self()->GetJniEnv();
356  ScopedLocalRef<jobject> system_class_loader(env,
357                                              soa.AddLocalReference<jobject>(result.GetL()));
358  CHECK(system_class_loader.get() != nullptr);
359
360  soa.Self()->SetClassLoaderOverride(system_class_loader.get());
361
362  Handle<mirror::Class> thread_class(
363      hs.NewHandle(soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_Thread)));
364  CHECK(cl->EnsureInitialized(soa.Self(), thread_class, true, true));
365
366  mirror::ArtField* contextClassLoader =
367      thread_class->FindDeclaredInstanceField("contextClassLoader", "Ljava/lang/ClassLoader;");
368  CHECK(contextClassLoader != NULL);
369
370  // We can't run in a transaction yet.
371  contextClassLoader->SetObject<false>(soa.Self()->GetPeer(),
372                                       soa.Decode<mirror::ClassLoader*>(system_class_loader.get()));
373
374  return env->NewGlobalRef(system_class_loader.get());
375}
376
377std::string Runtime::GetPatchoatExecutable() const {
378  if (!patchoat_executable_.empty()) {
379    return patchoat_executable_;
380  }
381  std::string patchoat_executable_(GetAndroidRoot());
382  patchoat_executable_ += (kIsDebugBuild ? "/bin/patchoatd" : "/bin/patchoat");
383  return patchoat_executable_;
384}
385
386std::string Runtime::GetCompilerExecutable() const {
387  if (!compiler_executable_.empty()) {
388    return compiler_executable_;
389  }
390  std::string compiler_executable(GetAndroidRoot());
391  compiler_executable += (kIsDebugBuild ? "/bin/dex2oatd" : "/bin/dex2oat");
392  return compiler_executable;
393}
394
395bool Runtime::Start() {
396  VLOG(startup) << "Runtime::Start entering";
397
398  // Restore main thread state to kNative as expected by native code.
399  Thread* self = Thread::Current();
400
401  self->TransitionFromRunnableToSuspended(kNative);
402
403  started_ = true;
404
405  if (!IsImageDex2OatEnabled() || !Runtime::Current()->GetHeap()->HasImageSpace()) {
406    ScopedObjectAccess soa(Thread::Current());
407    StackHandleScope<1> hs(soa.Self());
408    auto klass(hs.NewHandle<mirror::Class>(mirror::Class::GetJavaLangClass()));
409    class_linker_->EnsureInitialized(soa.Self(), klass, true, true);
410  }
411
412  // InitNativeMethods needs to be after started_ so that the classes
413  // it touches will have methods linked to the oat file if necessary.
414  InitNativeMethods();
415
416  // Initialize well known thread group values that may be accessed threads while attaching.
417  InitThreadGroups(self);
418
419  Thread::FinishStartup();
420
421  if (is_zygote_) {
422    if (!InitZygote()) {
423      return false;
424    }
425  } else {
426    DidForkFromZygote(NativeBridgeAction::kInitialize);
427  }
428
429  StartDaemonThreads();
430
431  system_class_loader_ = CreateSystemClassLoader();
432
433  {
434    ScopedObjectAccess soa(self);
435    self->GetJniEnv()->locals.AssertEmpty();
436  }
437
438  VLOG(startup) << "Runtime::Start exiting";
439  finished_starting_ = true;
440
441  if (profiler_options_.IsEnabled() && !profile_output_filename_.empty()) {
442    // User has asked for a profile using -Xenable-profiler.
443    // Create the profile file if it doesn't exist.
444    int fd = open(profile_output_filename_.c_str(), O_RDWR|O_CREAT|O_EXCL, 0660);
445    if (fd >= 0) {
446      close(fd);
447    } else if (errno != EEXIST) {
448      LOG(INFO) << "Failed to access the profile file. Profiler disabled.";
449      return true;
450    }
451    StartProfiler(profile_output_filename_.c_str());
452  }
453
454  return true;
455}
456
457void Runtime::EndThreadBirth() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) {
458  DCHECK_GT(threads_being_born_, 0U);
459  threads_being_born_--;
460  if (shutting_down_started_ && threads_being_born_ == 0) {
461    shutdown_cond_->Broadcast(Thread::Current());
462  }
463}
464
465// Do zygote-mode-only initialization.
466bool Runtime::InitZygote() {
467#ifdef __linux__
468  // zygote goes into its own process group
469  setpgid(0, 0);
470
471  // See storage config details at http://source.android.com/tech/storage/
472  // Create private mount namespace shared by all children
473  if (unshare(CLONE_NEWNS) == -1) {
474    PLOG(WARNING) << "Failed to unshare()";
475    return false;
476  }
477
478  // Mark rootfs as being a slave so that changes from default
479  // namespace only flow into our children.
480  if (mount("rootfs", "/", NULL, (MS_SLAVE | MS_REC), NULL) == -1) {
481    PLOG(WARNING) << "Failed to mount() rootfs as MS_SLAVE";
482    return false;
483  }
484
485  // Create a staging tmpfs that is shared by our children; they will
486  // bind mount storage into their respective private namespaces, which
487  // are isolated from each other.
488  const char* target_base = getenv("EMULATED_STORAGE_TARGET");
489  if (target_base != NULL) {
490    if (mount("tmpfs", target_base, "tmpfs", MS_NOSUID | MS_NODEV,
491              "uid=0,gid=1028,mode=0751") == -1) {
492      LOG(WARNING) << "Failed to mount tmpfs to " << target_base;
493      return false;
494    }
495  }
496
497  return true;
498#else
499  UNIMPLEMENTED(FATAL);
500  return false;
501#endif
502}
503
504void Runtime::DidForkFromZygote(NativeBridgeAction action) {
505  is_zygote_ = false;
506
507  switch (action) {
508    case NativeBridgeAction::kUnload:
509      android::UnloadNativeBridge();
510      break;
511
512    case NativeBridgeAction::kInitialize:
513      android::InitializeNativeBridge();
514      break;
515  }
516
517  // Create the thread pool.
518  heap_->CreateThreadPool();
519
520  StartSignalCatcher();
521
522  // Start the JDWP thread. If the command-line debugger flags specified "suspend=y",
523  // this will pause the runtime, so we probably want this to come last.
524  Dbg::StartJdwp();
525}
526
527void Runtime::StartSignalCatcher() {
528  if (!is_zygote_) {
529    signal_catcher_ = new SignalCatcher(stack_trace_file_);
530  }
531}
532
533bool Runtime::IsShuttingDown(Thread* self) {
534  MutexLock mu(self, *Locks::runtime_shutdown_lock_);
535  return IsShuttingDownLocked();
536}
537
538void Runtime::StartDaemonThreads() {
539  VLOG(startup) << "Runtime::StartDaemonThreads entering";
540
541  Thread* self = Thread::Current();
542
543  // Must be in the kNative state for calling native methods.
544  CHECK_EQ(self->GetState(), kNative);
545
546  JNIEnv* env = self->GetJniEnv();
547  env->CallStaticVoidMethod(WellKnownClasses::java_lang_Daemons,
548                            WellKnownClasses::java_lang_Daemons_start);
549  if (env->ExceptionCheck()) {
550    env->ExceptionDescribe();
551    LOG(FATAL) << "Error starting java.lang.Daemons";
552  }
553
554  VLOG(startup) << "Runtime::StartDaemonThreads exiting";
555}
556
557static bool OpenDexFilesFromImage(const std::vector<std::string>& dex_filenames,
558                                  const std::string& image_location,
559                                  std::vector<const DexFile*>& dex_files,
560                                  size_t* failures) {
561  std::string system_filename;
562  bool has_system = false;
563  std::string cache_filename_unused;
564  bool dalvik_cache_exists_unused;
565  bool has_cache_unused;
566  bool found_image = gc::space::ImageSpace::FindImageFilename(image_location.c_str(),
567                                                              kRuntimeISA,
568                                                              &system_filename,
569                                                              &has_system,
570                                                              &cache_filename_unused,
571                                                              &dalvik_cache_exists_unused,
572                                                              &has_cache_unused);
573  *failures = 0;
574  if (!found_image || !has_system) {
575    return false;
576  }
577  std::string error_msg;
578  // We are falling back to non-executable use of the oat file because patching failed, presumably
579  // due to lack of space.
580  std::string oat_filename = ImageHeader::GetOatLocationFromImageLocation(system_filename.c_str());
581  std::string oat_location = ImageHeader::GetOatLocationFromImageLocation(image_location.c_str());
582  std::unique_ptr<File> file(OS::OpenFileForReading(oat_filename.c_str()));
583  if (file.get() == nullptr) {
584    return false;
585  }
586  std::unique_ptr<ElfFile> elf_file(ElfFile::Open(file.release(), false, false, &error_msg));
587  if (elf_file.get() == nullptr) {
588    return false;
589  }
590  std::unique_ptr<OatFile> oat_file(OatFile::OpenWithElfFile(elf_file.release(), oat_location,
591                                                             &error_msg));
592  if (oat_file.get() == nullptr) {
593    LOG(INFO) << "Unable to use '" << oat_filename << "' because " << error_msg;
594    return false;
595  }
596
597  for (const OatFile::OatDexFile* oat_dex_file : oat_file->GetOatDexFiles()) {
598    if (oat_dex_file == nullptr) {
599      *failures += 1;
600      continue;
601    }
602    const DexFile* dex_file = oat_dex_file->OpenDexFile(&error_msg);
603    if (dex_file == nullptr) {
604      *failures += 1;
605    } else {
606      dex_files.push_back(dex_file);
607    }
608  }
609  Runtime::Current()->GetClassLinker()->RegisterOatFile(oat_file.release());
610  return true;
611}
612
613
614static size_t OpenDexFiles(const std::vector<std::string>& dex_filenames,
615                           const std::string& image_location,
616                           std::vector<const DexFile*>& dex_files) {
617  size_t failure_count = 0;
618  if (!image_location.empty() && OpenDexFilesFromImage(dex_filenames, image_location, dex_files,
619                                                       &failure_count)) {
620    return failure_count;
621  }
622  failure_count = 0;
623  for (size_t i = 0; i < dex_filenames.size(); i++) {
624    const char* dex_filename = dex_filenames[i].c_str();
625    std::string error_msg;
626    if (!OS::FileExists(dex_filename)) {
627      LOG(WARNING) << "Skipping non-existent dex file '" << dex_filename << "'";
628      continue;
629    }
630    if (!DexFile::Open(dex_filename, dex_filename, &error_msg, &dex_files)) {
631      LOG(WARNING) << "Failed to open .dex from file '" << dex_filename << "': " << error_msg;
632      ++failure_count;
633    }
634  }
635  return failure_count;
636}
637
638bool Runtime::Init(const RuntimeOptions& raw_options, bool ignore_unrecognized) {
639  CHECK_EQ(sysconf(_SC_PAGE_SIZE), kPageSize);
640
641  std::unique_ptr<ParsedOptions> options(ParsedOptions::Create(raw_options, ignore_unrecognized));
642  if (options.get() == nullptr) {
643    LOG(ERROR) << "Failed to parse options";
644    return false;
645  }
646  VLOG(startup) << "Runtime::Init -verbose:startup enabled";
647
648  QuasiAtomic::Startup();
649
650  Monitor::Init(options->lock_profiling_threshold_, options->hook_is_sensitive_thread_);
651
652  boot_class_path_string_ = options->boot_class_path_string_;
653  class_path_string_ = options->class_path_string_;
654  properties_ = options->properties_;
655
656  compiler_callbacks_ = options->compiler_callbacks_;
657  patchoat_executable_ = options->patchoat_executable_;
658  must_relocate_ = options->must_relocate_;
659  is_zygote_ = options->is_zygote_;
660  is_explicit_gc_disabled_ = options->is_explicit_gc_disabled_;
661  dex2oat_enabled_ = options->dex2oat_enabled_;
662  image_dex2oat_enabled_ = options->image_dex2oat_enabled_;
663
664  vfprintf_ = options->hook_vfprintf_;
665  exit_ = options->hook_exit_;
666  abort_ = options->hook_abort_;
667
668  default_stack_size_ = options->stack_size_;
669  stack_trace_file_ = options->stack_trace_file_;
670
671  compiler_executable_ = options->compiler_executable_;
672  compiler_options_ = options->compiler_options_;
673  image_compiler_options_ = options->image_compiler_options_;
674
675  max_spins_before_thin_lock_inflation_ = options->max_spins_before_thin_lock_inflation_;
676
677  monitor_list_ = new MonitorList;
678  monitor_pool_ = MonitorPool::Create();
679  thread_list_ = new ThreadList;
680  intern_table_ = new InternTable;
681
682  verify_ = options->verify_;
683
684  if (options->interpreter_only_) {
685    GetInstrumentation()->ForceInterpretOnly();
686  }
687
688  heap_ = new gc::Heap(options->heap_initial_size_,
689                       options->heap_growth_limit_,
690                       options->heap_min_free_,
691                       options->heap_max_free_,
692                       options->heap_target_utilization_,
693                       options->foreground_heap_growth_multiplier_,
694                       options->heap_maximum_size_,
695                       options->heap_non_moving_space_capacity_,
696                       options->image_,
697                       options->image_isa_,
698                       options->collector_type_,
699                       options->background_collector_type_,
700                       options->large_object_space_type_,
701                       options->large_object_threshold_,
702                       options->parallel_gc_threads_,
703                       options->conc_gc_threads_,
704                       options->low_memory_mode_,
705                       options->long_pause_log_threshold_,
706                       options->long_gc_log_threshold_,
707                       options->ignore_max_footprint_,
708                       options->use_tlab_,
709                       options->verify_pre_gc_heap_,
710                       options->verify_pre_sweeping_heap_,
711                       options->verify_post_gc_heap_,
712                       options->verify_pre_gc_rosalloc_,
713                       options->verify_pre_sweeping_rosalloc_,
714                       options->verify_post_gc_rosalloc_,
715                       options->use_homogeneous_space_compaction_for_oom_,
716                       options->min_interval_homogeneous_space_compaction_by_oom_);
717
718  dump_gc_performance_on_shutdown_ = options->dump_gc_performance_on_shutdown_;
719
720  BlockSignals();
721  InitPlatformSignalHandlers();
722
723  // Change the implicit checks flags based on runtime architecture.
724  switch (kRuntimeISA) {
725    case kArm:
726    case kThumb2:
727    case kX86:
728    case kArm64:
729    case kX86_64:
730      implicit_null_checks_ = true;
731      // Installing stack protection does not play well with valgrind.
732      implicit_so_checks_ = (RUNNING_ON_VALGRIND == 0);
733      break;
734    default:
735      // Keep the defaults.
736      break;
737  }
738
739  if (implicit_null_checks_ || implicit_so_checks_ || implicit_suspend_checks_) {
740    fault_manager.Init();
741
742    // These need to be in a specific order.  The null point check handler must be
743    // after the suspend check and stack overflow check handlers.
744    //
745    // Note: the instances attach themselves to the fault manager and are handled by it. The manager
746    //       will delete the instance on Shutdown().
747    if (implicit_suspend_checks_) {
748      new SuspensionHandler(&fault_manager);
749    }
750
751    if (implicit_so_checks_) {
752      new StackOverflowHandler(&fault_manager);
753    }
754
755    if (implicit_null_checks_) {
756      new NullPointerHandler(&fault_manager);
757    }
758
759    if (kEnableJavaStackTraceHandler) {
760      new JavaStackTraceHandler(&fault_manager);
761    }
762  }
763
764  java_vm_ = new JavaVMExt(this, options.get());
765
766  Thread::Startup();
767
768  // ClassLinker needs an attached thread, but we can't fully attach a thread without creating
769  // objects. We can't supply a thread group yet; it will be fixed later. Since we are the main
770  // thread, we do not get a java peer.
771  Thread* self = Thread::Attach("main", false, nullptr, false);
772  CHECK_EQ(self->GetThreadId(), ThreadList::kMainThreadId);
773  CHECK(self != nullptr);
774
775  // Set us to runnable so tools using a runtime can allocate and GC by default
776  self->TransitionFromSuspendedToRunnable();
777
778  // Now we're attached, we can take the heap locks and validate the heap.
779  GetHeap()->EnableObjectValidation();
780
781  CHECK_GE(GetHeap()->GetContinuousSpaces().size(), 1U);
782  class_linker_ = new ClassLinker(intern_table_);
783  if (GetHeap()->HasImageSpace()) {
784    class_linker_->InitFromImage();
785    if (kIsDebugBuild) {
786      GetHeap()->GetImageSpace()->VerifyImageAllocations();
787    }
788  } else if (!IsCompiler() || !image_dex2oat_enabled_) {
789    std::vector<std::string> dex_filenames;
790    Split(boot_class_path_string_, ':', dex_filenames);
791    std::vector<const DexFile*> boot_class_path;
792    OpenDexFiles(dex_filenames, options->image_, boot_class_path);
793    class_linker_->InitWithoutImage(boot_class_path);
794    // TODO: Should we move the following to InitWithoutImage?
795    SetInstructionSet(kRuntimeISA);
796    for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
797      Runtime::CalleeSaveType type = Runtime::CalleeSaveType(i);
798      if (!HasCalleeSaveMethod(type)) {
799        SetCalleeSaveMethod(CreateCalleeSaveMethod(type), type);
800      }
801    }
802  } else {
803    CHECK(options->boot_class_path_ != nullptr);
804    CHECK_NE(options->boot_class_path_->size(), 0U);
805    class_linker_->InitWithoutImage(*options->boot_class_path_);
806  }
807  CHECK(class_linker_ != nullptr);
808
809  // Initialize the special sentinel_ value early.
810  sentinel_ = GcRoot<mirror::Object>(class_linker_->AllocObject(self));
811  CHECK(sentinel_.Read() != nullptr);
812
813  verifier::MethodVerifier::Init();
814
815  method_trace_ = options->method_trace_;
816  method_trace_file_ = options->method_trace_file_;
817  method_trace_file_size_ = options->method_trace_file_size_;
818
819  profile_output_filename_ = options->profile_output_filename_;
820  profiler_options_ = options->profiler_options_;
821
822  // TODO: move this to just be an Trace::Start argument
823  Trace::SetDefaultClockSource(options->profile_clock_source_);
824
825  if (options->method_trace_) {
826    ScopedThreadStateChange tsc(self, kWaitingForMethodTracingStart);
827    Trace::Start(options->method_trace_file_.c_str(), -1, options->method_trace_file_size_, 0,
828                 false, false, 0);
829  }
830
831  // Pre-allocate an OutOfMemoryError for the double-OOME case.
832  self->ThrowNewException(ThrowLocation(), "Ljava/lang/OutOfMemoryError;",
833                          "OutOfMemoryError thrown while trying to throw OutOfMemoryError; "
834                          "no stack available");
835  pre_allocated_OutOfMemoryError_ = GcRoot<mirror::Throwable>(self->GetException(NULL));
836  self->ClearException();
837
838  // Pre-allocate a NoClassDefFoundError for the common case of failing to find a system class
839  // ahead of checking the application's class loader.
840  self->ThrowNewException(ThrowLocation(), "Ljava/lang/NoClassDefFoundError;",
841                          "Class not found using the boot class loader; no stack available");
842  pre_allocated_NoClassDefFoundError_ = GcRoot<mirror::Throwable>(self->GetException(NULL));
843  self->ClearException();
844
845  // Look for a native bridge.
846  //
847  // The intended flow here is, in the case of a running system:
848  //
849  // Runtime::Init() (zygote):
850  //   LoadNativeBridge -> dlopen from cmd line parameter.
851  //  |
852  //  V
853  // Runtime::Start() (zygote):
854  //   No-op wrt native bridge.
855  //  |
856  //  | start app
857  //  V
858  // DidForkFromZygote(action)
859  //   action = kUnload -> dlclose native bridge.
860  //   action = kInitialize -> initialize library
861  //
862  //
863  // The intended flow here is, in the case of a simple dalvikvm call:
864  //
865  // Runtime::Init():
866  //   LoadNativeBridge -> dlopen from cmd line parameter.
867  //  |
868  //  V
869  // Runtime::Start():
870  //   DidForkFromZygote(kInitialize) -> try to initialize any native bridge given.
871  //   No-op wrt native bridge.
872  native_bridge_library_filename_ = options->native_bridge_library_filename_;
873  android::LoadNativeBridge(native_bridge_library_filename_.c_str(), &native_bridge_art_callbacks_);
874  VLOG(startup) << "Runtime::Setup native bridge library: "
875                << (native_bridge_library_filename_.empty() ?
876                    "(empty)" : native_bridge_library_filename_);
877
878  VLOG(startup) << "Runtime::Init exiting";
879  return true;
880}
881
882void Runtime::InitNativeMethods() {
883  VLOG(startup) << "Runtime::InitNativeMethods entering";
884  Thread* self = Thread::Current();
885  JNIEnv* env = self->GetJniEnv();
886
887  // Must be in the kNative state for calling native methods (JNI_OnLoad code).
888  CHECK_EQ(self->GetState(), kNative);
889
890  // First set up JniConstants, which is used by both the runtime's built-in native
891  // methods and libcore.
892  JniConstants::init(env);
893  WellKnownClasses::Init(env);
894
895  // Then set up the native methods provided by the runtime itself.
896  RegisterRuntimeNativeMethods(env);
897
898  // Then set up libcore, which is just a regular JNI library with a regular JNI_OnLoad.
899  // Most JNI libraries can just use System.loadLibrary, but libcore can't because it's
900  // the library that implements System.loadLibrary!
901  {
902    std::string mapped_name(StringPrintf(OS_SHARED_LIB_FORMAT_STR, "javacore"));
903    std::string reason;
904    if (!instance_->java_vm_->LoadNativeLibrary(env, mapped_name, nullptr, &reason)) {
905      LOG(FATAL) << "LoadNativeLibrary failed for \"" << mapped_name << "\": " << reason;
906    }
907  }
908
909  // Initialize well known classes that may invoke runtime native methods.
910  WellKnownClasses::LateInit(env);
911
912  VLOG(startup) << "Runtime::InitNativeMethods exiting";
913}
914
915void Runtime::InitThreadGroups(Thread* self) {
916  JNIEnvExt* env = self->GetJniEnv();
917  ScopedJniEnvLocalRefState env_state(env);
918  main_thread_group_ =
919      env->NewGlobalRef(env->GetStaticObjectField(
920          WellKnownClasses::java_lang_ThreadGroup,
921          WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup));
922  CHECK(main_thread_group_ != NULL || IsCompiler());
923  system_thread_group_ =
924      env->NewGlobalRef(env->GetStaticObjectField(
925          WellKnownClasses::java_lang_ThreadGroup,
926          WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup));
927  CHECK(system_thread_group_ != NULL || IsCompiler());
928}
929
930jobject Runtime::GetMainThreadGroup() const {
931  CHECK(main_thread_group_ != NULL || IsCompiler());
932  return main_thread_group_;
933}
934
935jobject Runtime::GetSystemThreadGroup() const {
936  CHECK(system_thread_group_ != NULL || IsCompiler());
937  return system_thread_group_;
938}
939
940jobject Runtime::GetSystemClassLoader() const {
941  CHECK(system_class_loader_ != NULL || IsCompiler());
942  return system_class_loader_;
943}
944
945void Runtime::RegisterRuntimeNativeMethods(JNIEnv* env) {
946#define REGISTER(FN) extern void FN(JNIEnv*); FN(env)
947  // Register Throwable first so that registration of other native methods can throw exceptions
948  REGISTER(register_java_lang_Throwable);
949  REGISTER(register_dalvik_system_DexFile);
950  REGISTER(register_dalvik_system_VMDebug);
951  REGISTER(register_dalvik_system_VMRuntime);
952  REGISTER(register_dalvik_system_VMStack);
953  REGISTER(register_dalvik_system_ZygoteHooks);
954  REGISTER(register_java_lang_Class);
955  REGISTER(register_java_lang_DexCache);
956  REGISTER(register_java_lang_Object);
957  REGISTER(register_java_lang_Runtime);
958  REGISTER(register_java_lang_String);
959  REGISTER(register_java_lang_System);
960  REGISTER(register_java_lang_Thread);
961  REGISTER(register_java_lang_VMClassLoader);
962  REGISTER(register_java_lang_ref_FinalizerReference);
963  REGISTER(register_java_lang_ref_Reference);
964  REGISTER(register_java_lang_reflect_Array);
965  REGISTER(register_java_lang_reflect_Constructor);
966  REGISTER(register_java_lang_reflect_Field);
967  REGISTER(register_java_lang_reflect_Method);
968  REGISTER(register_java_lang_reflect_Proxy);
969  REGISTER(register_java_util_concurrent_atomic_AtomicLong);
970  REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmServer);
971  REGISTER(register_org_apache_harmony_dalvik_ddmc_DdmVmInternal);
972  REGISTER(register_sun_misc_Unsafe);
973#undef REGISTER
974}
975
976void Runtime::DumpForSigQuit(std::ostream& os) {
977  GetClassLinker()->DumpForSigQuit(os);
978  GetInternTable()->DumpForSigQuit(os);
979  GetJavaVM()->DumpForSigQuit(os);
980  GetHeap()->DumpForSigQuit(os);
981  TrackedAllocators::Dump(os);
982  os << "\n";
983
984  thread_list_->DumpForSigQuit(os);
985  BaseMutex::DumpAll(os);
986}
987
988void Runtime::DumpLockHolders(std::ostream& os) {
989  uint64_t mutator_lock_owner = Locks::mutator_lock_->GetExclusiveOwnerTid();
990  pid_t thread_list_lock_owner = GetThreadList()->GetLockOwner();
991  pid_t classes_lock_owner = GetClassLinker()->GetClassesLockOwner();
992  pid_t dex_lock_owner = GetClassLinker()->GetDexLockOwner();
993  if ((thread_list_lock_owner | classes_lock_owner | dex_lock_owner) != 0) {
994    os << "Mutator lock exclusive owner tid: " << mutator_lock_owner << "\n"
995       << "ThreadList lock owner tid: " << thread_list_lock_owner << "\n"
996       << "ClassLinker classes lock owner tid: " << classes_lock_owner << "\n"
997       << "ClassLinker dex lock owner tid: " << dex_lock_owner << "\n";
998  }
999}
1000
1001void Runtime::SetStatsEnabled(bool new_state, bool suspended) {
1002  if (new_state == true) {
1003    GetStats()->Clear(~0);
1004    // TODO: wouldn't it make more sense to clear _all_ threads' stats?
1005    Thread::Current()->GetStats()->Clear(~0);
1006    GetInstrumentation()->InstrumentQuickAllocEntryPoints(suspended);
1007  } else {
1008    GetInstrumentation()->UninstrumentQuickAllocEntryPoints(suspended);
1009  }
1010  stats_enabled_ = new_state;
1011}
1012
1013void Runtime::ResetStats(int kinds) {
1014  GetStats()->Clear(kinds & 0xffff);
1015  // TODO: wouldn't it make more sense to clear _all_ threads' stats?
1016  Thread::Current()->GetStats()->Clear(kinds >> 16);
1017}
1018
1019int32_t Runtime::GetStat(int kind) {
1020  RuntimeStats* stats;
1021  if (kind < (1<<16)) {
1022    stats = GetStats();
1023  } else {
1024    stats = Thread::Current()->GetStats();
1025    kind >>= 16;
1026  }
1027  switch (kind) {
1028  case KIND_ALLOCATED_OBJECTS:
1029    return stats->allocated_objects;
1030  case KIND_ALLOCATED_BYTES:
1031    return stats->allocated_bytes;
1032  case KIND_FREED_OBJECTS:
1033    return stats->freed_objects;
1034  case KIND_FREED_BYTES:
1035    return stats->freed_bytes;
1036  case KIND_GC_INVOCATIONS:
1037    return stats->gc_for_alloc_count;
1038  case KIND_CLASS_INIT_COUNT:
1039    return stats->class_init_count;
1040  case KIND_CLASS_INIT_TIME:
1041    // Convert ns to us, reduce to 32 bits.
1042    return static_cast<int>(stats->class_init_time_ns / 1000);
1043  case KIND_EXT_ALLOCATED_OBJECTS:
1044  case KIND_EXT_ALLOCATED_BYTES:
1045  case KIND_EXT_FREED_OBJECTS:
1046  case KIND_EXT_FREED_BYTES:
1047    return 0;  // backward compatibility
1048  default:
1049    LOG(FATAL) << "Unknown statistic " << kind;
1050    return -1;  // unreachable
1051  }
1052}
1053
1054void Runtime::BlockSignals() {
1055  SignalSet signals;
1056  signals.Add(SIGPIPE);
1057  // SIGQUIT is used to dump the runtime's state (including stack traces).
1058  signals.Add(SIGQUIT);
1059  // SIGUSR1 is used to initiate a GC.
1060  signals.Add(SIGUSR1);
1061  signals.Block();
1062}
1063
1064bool Runtime::AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group,
1065                                  bool create_peer) {
1066  return Thread::Attach(thread_name, as_daemon, thread_group, create_peer) != NULL;
1067}
1068
1069void Runtime::DetachCurrentThread() {
1070  Thread* self = Thread::Current();
1071  if (self == NULL) {
1072    LOG(FATAL) << "attempting to detach thread that is not attached";
1073  }
1074  if (self->HasManagedStack()) {
1075    LOG(FATAL) << *Thread::Current() << " attempting to detach while still running code";
1076  }
1077  thread_list_->Unregister(self);
1078}
1079
1080mirror::Throwable* Runtime::GetPreAllocatedOutOfMemoryError() {
1081  mirror::Throwable* oome = pre_allocated_OutOfMemoryError_.Read();
1082  if (oome == nullptr) {
1083    LOG(ERROR) << "Failed to return pre-allocated OOME";
1084  }
1085  return oome;
1086}
1087
1088mirror::Throwable* Runtime::GetPreAllocatedNoClassDefFoundError() {
1089  mirror::Throwable* ncdfe = pre_allocated_NoClassDefFoundError_.Read();
1090  if (ncdfe == nullptr) {
1091    LOG(ERROR) << "Failed to return pre-allocated NoClassDefFoundError";
1092  }
1093  return ncdfe;
1094}
1095
1096void Runtime::VisitConstantRoots(RootCallback* callback, void* arg) {
1097  // Visit the classes held as static in mirror classes, these can be visited concurrently and only
1098  // need to be visited once per GC since they never change.
1099  mirror::ArtField::VisitRoots(callback, arg);
1100  mirror::ArtMethod::VisitRoots(callback, arg);
1101  mirror::Class::VisitRoots(callback, arg);
1102  mirror::Reference::VisitRoots(callback, arg);
1103  mirror::StackTraceElement::VisitRoots(callback, arg);
1104  mirror::String::VisitRoots(callback, arg);
1105  mirror::Throwable::VisitRoots(callback, arg);
1106  // Visit all the primitive array types classes.
1107  mirror::PrimitiveArray<uint8_t>::VisitRoots(callback, arg);   // BooleanArray
1108  mirror::PrimitiveArray<int8_t>::VisitRoots(callback, arg);    // ByteArray
1109  mirror::PrimitiveArray<uint16_t>::VisitRoots(callback, arg);  // CharArray
1110  mirror::PrimitiveArray<double>::VisitRoots(callback, arg);    // DoubleArray
1111  mirror::PrimitiveArray<float>::VisitRoots(callback, arg);     // FloatArray
1112  mirror::PrimitiveArray<int32_t>::VisitRoots(callback, arg);   // IntArray
1113  mirror::PrimitiveArray<int64_t>::VisitRoots(callback, arg);   // LongArray
1114  mirror::PrimitiveArray<int16_t>::VisitRoots(callback, arg);   // ShortArray
1115}
1116
1117void Runtime::VisitConcurrentRoots(RootCallback* callback, void* arg, VisitRootFlags flags) {
1118  intern_table_->VisitRoots(callback, arg, flags);
1119  class_linker_->VisitRoots(callback, arg, flags);
1120  if ((flags & kVisitRootFlagNewRoots) == 0) {
1121    // Guaranteed to have no new roots in the constant roots.
1122    VisitConstantRoots(callback, arg);
1123  }
1124}
1125
1126void Runtime::VisitNonThreadRoots(RootCallback* callback, void* arg) {
1127  java_vm_->VisitRoots(callback, arg);
1128  if (!sentinel_.IsNull()) {
1129    sentinel_.VisitRoot(callback, arg, 0, kRootVMInternal);
1130    DCHECK(!sentinel_.IsNull());
1131  }
1132  if (!pre_allocated_OutOfMemoryError_.IsNull()) {
1133    pre_allocated_OutOfMemoryError_.VisitRoot(callback, arg, 0, kRootVMInternal);
1134    DCHECK(!pre_allocated_OutOfMemoryError_.IsNull());
1135  }
1136  resolution_method_.VisitRoot(callback, arg, 0, kRootVMInternal);
1137  DCHECK(!resolution_method_.IsNull());
1138  if (!pre_allocated_NoClassDefFoundError_.IsNull()) {
1139    pre_allocated_NoClassDefFoundError_.VisitRoot(callback, arg, 0, kRootVMInternal);
1140    DCHECK(!pre_allocated_NoClassDefFoundError_.IsNull());
1141  }
1142  if (HasImtConflictMethod()) {
1143    imt_conflict_method_.VisitRoot(callback, arg, 0, kRootVMInternal);
1144  }
1145  if (HasDefaultImt()) {
1146    default_imt_.VisitRoot(callback, arg, 0, kRootVMInternal);
1147  }
1148  for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
1149    if (!callee_save_methods_[i].IsNull()) {
1150      callee_save_methods_[i].VisitRoot(callback, arg, 0, kRootVMInternal);
1151    }
1152  }
1153  verifier::MethodVerifier::VisitStaticRoots(callback, arg);
1154  {
1155    MutexLock mu(Thread::Current(), method_verifier_lock_);
1156    for (verifier::MethodVerifier* verifier : method_verifiers_) {
1157      verifier->VisitRoots(callback, arg);
1158    }
1159  }
1160  if (preinitialization_transaction_ != nullptr) {
1161    preinitialization_transaction_->VisitRoots(callback, arg);
1162  }
1163  instrumentation_.VisitRoots(callback, arg);
1164}
1165
1166void Runtime::VisitNonConcurrentRoots(RootCallback* callback, void* arg) {
1167  thread_list_->VisitRoots(callback, arg);
1168  VisitNonThreadRoots(callback, arg);
1169}
1170
1171void Runtime::VisitRoots(RootCallback* callback, void* arg, VisitRootFlags flags) {
1172  VisitNonConcurrentRoots(callback, arg);
1173  VisitConcurrentRoots(callback, arg, flags);
1174}
1175
1176mirror::ObjectArray<mirror::ArtMethod>* Runtime::CreateDefaultImt(ClassLinker* cl) {
1177  Thread* self = Thread::Current();
1178  StackHandleScope<1> hs(self);
1179  Handle<mirror::ObjectArray<mirror::ArtMethod>> imtable(
1180      hs.NewHandle(cl->AllocArtMethodArray(self, 64)));
1181  mirror::ArtMethod* imt_conflict_method = Runtime::Current()->GetImtConflictMethod();
1182  for (size_t i = 0; i < static_cast<size_t>(imtable->GetLength()); i++) {
1183    imtable->Set<false>(i, imt_conflict_method);
1184  }
1185  return imtable.Get();
1186}
1187
1188mirror::ArtMethod* Runtime::CreateImtConflictMethod() {
1189  Thread* self = Thread::Current();
1190  Runtime* runtime = Runtime::Current();
1191  ClassLinker* class_linker = runtime->GetClassLinker();
1192  StackHandleScope<1> hs(self);
1193  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1194  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1195  // TODO: use a special method for imt conflict method saves.
1196  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1197  // When compiling, the code pointer will get set later when the image is loaded.
1198  if (runtime->IsCompiler()) {
1199    method->SetEntryPointFromPortableCompiledCode(nullptr);
1200    method->SetEntryPointFromQuickCompiledCode(nullptr);
1201  } else {
1202    method->SetEntryPointFromPortableCompiledCode(class_linker->GetPortableImtConflictTrampoline());
1203    method->SetEntryPointFromQuickCompiledCode(class_linker->GetQuickImtConflictTrampoline());
1204  }
1205  return method.Get();
1206}
1207
1208mirror::ArtMethod* Runtime::CreateResolutionMethod() {
1209  Thread* self = Thread::Current();
1210  Runtime* runtime = Runtime::Current();
1211  ClassLinker* class_linker = runtime->GetClassLinker();
1212  StackHandleScope<1> hs(self);
1213  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1214  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1215  // TODO: use a special method for resolution method saves
1216  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1217  // When compiling, the code pointer will get set later when the image is loaded.
1218  if (runtime->IsCompiler()) {
1219    method->SetEntryPointFromPortableCompiledCode(nullptr);
1220    method->SetEntryPointFromQuickCompiledCode(nullptr);
1221  } else {
1222    method->SetEntryPointFromPortableCompiledCode(class_linker->GetPortableResolutionTrampoline());
1223    method->SetEntryPointFromQuickCompiledCode(class_linker->GetQuickResolutionTrampoline());
1224  }
1225  return method.Get();
1226}
1227
1228mirror::ArtMethod* Runtime::CreateCalleeSaveMethod(CalleeSaveType type) {
1229  Thread* self = Thread::Current();
1230  Runtime* runtime = Runtime::Current();
1231  ClassLinker* class_linker = runtime->GetClassLinker();
1232  StackHandleScope<1> hs(self);
1233  Handle<mirror::ArtMethod> method(hs.NewHandle(class_linker->AllocArtMethod(self)));
1234  method->SetDeclaringClass(mirror::ArtMethod::GetJavaLangReflectArtMethod());
1235  // TODO: use a special method for callee saves
1236  method->SetDexMethodIndex(DexFile::kDexNoIndex);
1237  method->SetEntryPointFromPortableCompiledCode(nullptr);
1238  method->SetEntryPointFromQuickCompiledCode(nullptr);
1239  DCHECK_NE(instruction_set_, kNone);
1240  return method.Get();
1241}
1242
1243void Runtime::DisallowNewSystemWeaks() {
1244  monitor_list_->DisallowNewMonitors();
1245  intern_table_->DisallowNewInterns();
1246  java_vm_->DisallowNewWeakGlobals();
1247}
1248
1249void Runtime::AllowNewSystemWeaks() {
1250  monitor_list_->AllowNewMonitors();
1251  intern_table_->AllowNewInterns();
1252  java_vm_->AllowNewWeakGlobals();
1253}
1254
1255void Runtime::SetInstructionSet(InstructionSet instruction_set) {
1256  instruction_set_ = instruction_set;
1257  if ((instruction_set_ == kThumb2) || (instruction_set_ == kArm)) {
1258    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1259      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1260      callee_save_method_frame_infos_[i] = arm::ArmCalleeSaveMethodFrameInfo(type);
1261    }
1262  } else if (instruction_set_ == kMips) {
1263    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1264      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1265      callee_save_method_frame_infos_[i] = mips::MipsCalleeSaveMethodFrameInfo(type);
1266    }
1267  } else if (instruction_set_ == kX86) {
1268    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1269      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1270      callee_save_method_frame_infos_[i] = x86::X86CalleeSaveMethodFrameInfo(type);
1271    }
1272  } else if (instruction_set_ == kX86_64) {
1273    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1274      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1275      callee_save_method_frame_infos_[i] = x86_64::X86_64CalleeSaveMethodFrameInfo(type);
1276    }
1277  } else if (instruction_set_ == kArm64) {
1278    for (int i = 0; i != kLastCalleeSaveType; ++i) {
1279      CalleeSaveType type = static_cast<CalleeSaveType>(i);
1280      callee_save_method_frame_infos_[i] = arm64::Arm64CalleeSaveMethodFrameInfo(type);
1281    }
1282  } else {
1283    UNIMPLEMENTED(FATAL) << instruction_set_;
1284  }
1285}
1286
1287void Runtime::SetCalleeSaveMethod(mirror::ArtMethod* method, CalleeSaveType type) {
1288  DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastCalleeSaveType));
1289  callee_save_methods_[type] = GcRoot<mirror::ArtMethod>(method);
1290}
1291
1292const std::vector<const DexFile*>& Runtime::GetCompileTimeClassPath(jobject class_loader) {
1293  if (class_loader == NULL) {
1294    return GetClassLinker()->GetBootClassPath();
1295  }
1296  CHECK(UseCompileTimeClassPath());
1297  CompileTimeClassPaths::const_iterator it = compile_time_class_paths_.find(class_loader);
1298  CHECK(it != compile_time_class_paths_.end());
1299  return it->second;
1300}
1301
1302void Runtime::SetCompileTimeClassPath(jobject class_loader,
1303                                      std::vector<const DexFile*>& class_path) {
1304  CHECK(!IsStarted());
1305  use_compile_time_class_path_ = true;
1306  compile_time_class_paths_.Put(class_loader, class_path);
1307}
1308
1309void Runtime::AddMethodVerifier(verifier::MethodVerifier* verifier) {
1310  DCHECK(verifier != nullptr);
1311  MutexLock mu(Thread::Current(), method_verifier_lock_);
1312  method_verifiers_.insert(verifier);
1313}
1314
1315void Runtime::RemoveMethodVerifier(verifier::MethodVerifier* verifier) {
1316  DCHECK(verifier != nullptr);
1317  MutexLock mu(Thread::Current(), method_verifier_lock_);
1318  auto it = method_verifiers_.find(verifier);
1319  CHECK(it != method_verifiers_.end());
1320  method_verifiers_.erase(it);
1321}
1322
1323void Runtime::StartProfiler(const char* profile_output_filename) {
1324  profile_output_filename_ = profile_output_filename;
1325  profiler_started_ =
1326    BackgroundMethodSamplingProfiler::Start(profile_output_filename_, profiler_options_);
1327}
1328
1329// Transaction support.
1330void Runtime::EnterTransactionMode(Transaction* transaction) {
1331  DCHECK(IsCompiler());
1332  DCHECK(transaction != nullptr);
1333  DCHECK(!IsActiveTransaction());
1334  preinitialization_transaction_ = transaction;
1335}
1336
1337void Runtime::ExitTransactionMode() {
1338  DCHECK(IsCompiler());
1339  DCHECK(IsActiveTransaction());
1340  preinitialization_transaction_ = nullptr;
1341}
1342
1343void Runtime::RecordWriteFieldBoolean(mirror::Object* obj, MemberOffset field_offset,
1344                                      uint8_t value, bool is_volatile) const {
1345  DCHECK(IsCompiler());
1346  DCHECK(IsActiveTransaction());
1347  preinitialization_transaction_->RecordWriteFieldBoolean(obj, field_offset, value, is_volatile);
1348}
1349
1350void Runtime::RecordWriteFieldByte(mirror::Object* obj, MemberOffset field_offset,
1351                                   int8_t value, bool is_volatile) const {
1352  DCHECK(IsCompiler());
1353  DCHECK(IsActiveTransaction());
1354  preinitialization_transaction_->RecordWriteFieldByte(obj, field_offset, value, is_volatile);
1355}
1356
1357void Runtime::RecordWriteFieldChar(mirror::Object* obj, MemberOffset field_offset,
1358                                   uint16_t value, bool is_volatile) const {
1359  DCHECK(IsCompiler());
1360  DCHECK(IsActiveTransaction());
1361  preinitialization_transaction_->RecordWriteFieldChar(obj, field_offset, value, is_volatile);
1362}
1363
1364void Runtime::RecordWriteFieldShort(mirror::Object* obj, MemberOffset field_offset,
1365                                    int16_t value, bool is_volatile) const {
1366  DCHECK(IsCompiler());
1367  DCHECK(IsActiveTransaction());
1368  preinitialization_transaction_->RecordWriteFieldShort(obj, field_offset, value, is_volatile);
1369}
1370
1371void Runtime::RecordWriteField32(mirror::Object* obj, MemberOffset field_offset,
1372                                 uint32_t value, bool is_volatile) const {
1373  DCHECK(IsCompiler());
1374  DCHECK(IsActiveTransaction());
1375  preinitialization_transaction_->RecordWriteField32(obj, field_offset, value, is_volatile);
1376}
1377
1378void Runtime::RecordWriteField64(mirror::Object* obj, MemberOffset field_offset,
1379                                 uint64_t value, bool is_volatile) const {
1380  DCHECK(IsCompiler());
1381  DCHECK(IsActiveTransaction());
1382  preinitialization_transaction_->RecordWriteField64(obj, field_offset, value, is_volatile);
1383}
1384
1385void Runtime::RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset,
1386                                        mirror::Object* value, bool is_volatile) const {
1387  DCHECK(IsCompiler());
1388  DCHECK(IsActiveTransaction());
1389  preinitialization_transaction_->RecordWriteFieldReference(obj, field_offset, value, is_volatile);
1390}
1391
1392void Runtime::RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const {
1393  DCHECK(IsCompiler());
1394  DCHECK(IsActiveTransaction());
1395  preinitialization_transaction_->RecordWriteArray(array, index, value);
1396}
1397
1398void Runtime::RecordStrongStringInsertion(mirror::String* s) const {
1399  DCHECK(IsCompiler());
1400  DCHECK(IsActiveTransaction());
1401  preinitialization_transaction_->RecordStrongStringInsertion(s);
1402}
1403
1404void Runtime::RecordWeakStringInsertion(mirror::String* s) const {
1405  DCHECK(IsCompiler());
1406  DCHECK(IsActiveTransaction());
1407  preinitialization_transaction_->RecordWeakStringInsertion(s);
1408}
1409
1410void Runtime::RecordStrongStringRemoval(mirror::String* s) const {
1411  DCHECK(IsCompiler());
1412  DCHECK(IsActiveTransaction());
1413  preinitialization_transaction_->RecordStrongStringRemoval(s);
1414}
1415
1416void Runtime::RecordWeakStringRemoval(mirror::String* s) const {
1417  DCHECK(IsCompiler());
1418  DCHECK(IsActiveTransaction());
1419  preinitialization_transaction_->RecordWeakStringRemoval(s);
1420}
1421
1422void Runtime::SetFaultMessage(const std::string& message) {
1423  MutexLock mu(Thread::Current(), fault_message_lock_);
1424  fault_message_ = message;
1425}
1426
1427void Runtime::AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* argv)
1428    const {
1429  if (GetInstrumentation()->InterpretOnly()) {
1430    argv->push_back("--compiler-filter=interpret-only");
1431  }
1432
1433  // Make the dex2oat instruction set match that of the launching runtime. If we have multiple
1434  // architecture support, dex2oat may be compiled as a different instruction-set than that
1435  // currently being executed.
1436  std::string instruction_set("--instruction-set=");
1437  instruction_set += GetInstructionSetString(kRuntimeISA);
1438  argv->push_back(instruction_set);
1439
1440  std::string features("--instruction-set-features=");
1441  features += GetDefaultInstructionSetFeatures();
1442  argv->push_back(features);
1443}
1444
1445void Runtime::UpdateProfilerState(int state) {
1446  VLOG(profiler) << "Profiler state updated to " << state;
1447}
1448}  // namespace art
1449