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
93 namespace art {
94
95 static constexpr bool kEnableJavaStackTraceHandler = false;
96 const char* Runtime::kDefaultInstructionSetFeatures =
97 STRINGIFY(ART_DEFAULT_INSTRUCTION_SET_FEATURES);
98 Runtime* Runtime::instance_ = NULL;
99
Runtime()100 Runtime::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
~Runtime()153 Runtime::~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
209 struct AbortState {
Dumpart::AbortState210 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
DumpThreadart::AbortState240 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
DumpAllThreadsart::AbortState251 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
Abort()271 void 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
PreZygoteFork()310 void Runtime::PreZygoteFork() {
311 heap_->PreZygoteFork();
312 }
313
CallExitHook(jint status)314 void 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
SweepSystemWeaks(IsMarkedCallback * visitor,void * arg)322 void Runtime::SweepSystemWeaks(IsMarkedCallback* visitor, void* arg) {
323 GetInternTable()->SweepInternTableWeaks(visitor, arg);
324 GetMonitorList()->SweepMonitorList(visitor, arg);
325 GetJavaVM()->SweepJniWeakGlobals(visitor, arg);
326 }
327
Create(const RuntimeOptions & options,bool ignore_unrecognized)328 bool 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
CreateSystemClassLoader()343 jobject 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
GetPatchoatExecutable() const385 std::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
GetCompilerExecutable() const394 std::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
Start()403 bool 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
EndThreadBirth()470 void 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.
InitZygote()479 bool 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
DidForkFromZygote(JNIEnv * env,NativeBridgeAction action,const char * isa)517 void 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
StartSignalCatcher()540 void Runtime::StartSignalCatcher() {
541 if (!is_zygote_) {
542 signal_catcher_ = new SignalCatcher(stack_trace_file_);
543 }
544 }
545
IsShuttingDown(Thread * self)546 bool Runtime::IsShuttingDown(Thread* self) {
547 MutexLock mu(self, *Locks::runtime_shutdown_lock_);
548 return IsShuttingDownLocked();
549 }
550
StartDaemonThreads()551 void 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
OpenDexFilesFromImage(const std::vector<std::string> & dex_filenames,const std::string & image_location,std::vector<const DexFile * > & dex_files,size_t * failures)570 static 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
OpenDexFiles(const std::vector<std::string> & dex_filenames,const std::string & image_location,std::vector<const DexFile * > & dex_files)629 static 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
Init(const RuntimeOptions & raw_options,bool ignore_unrecognized)653 bool 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
InitNativeMethods()891 void 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
InitThreadGroups(Thread * self)928 void 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
GetMainThreadGroup() const943 jobject Runtime::GetMainThreadGroup() const {
944 CHECK(main_thread_group_ != NULL || IsCompiler());
945 return main_thread_group_;
946 }
947
GetSystemThreadGroup() const948 jobject Runtime::GetSystemThreadGroup() const {
949 CHECK(system_thread_group_ != NULL || IsCompiler());
950 return system_thread_group_;
951 }
952
GetSystemClassLoader() const953 jobject Runtime::GetSystemClassLoader() const {
954 CHECK(system_class_loader_ != NULL || IsCompiler());
955 return system_class_loader_;
956 }
957
RegisterRuntimeNativeMethods(JNIEnv * env)958 void 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
DumpForSigQuit(std::ostream & os)989 void 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
DumpLockHolders(std::ostream & os)1001 void 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
SetStatsEnabled(bool new_state)1014 void 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
ResetStats(int kinds)1030 void 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
GetStat(int kind)1036 int32_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
BlockSignals()1071 void 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
AttachCurrentThread(const char * thread_name,bool as_daemon,jobject thread_group,bool create_peer)1081 bool 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
DetachCurrentThread()1086 void 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
GetPreAllocatedOutOfMemoryError()1097 mirror::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
GetPreAllocatedNoClassDefFoundError()1105 mirror::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
VisitConstantRoots(RootCallback * callback,void * arg)1113 void 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
VisitConcurrentRoots(RootCallback * callback,void * arg,VisitRootFlags flags)1134 void 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
VisitNonThreadRoots(RootCallback * callback,void * arg)1143 void 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
VisitNonConcurrentRoots(RootCallback * callback,void * arg)1179 void Runtime::VisitNonConcurrentRoots(RootCallback* callback, void* arg) {
1180 thread_list_->VisitRoots(callback, arg);
1181 VisitNonThreadRoots(callback, arg);
1182 }
1183
VisitRoots(RootCallback * callback,void * arg,VisitRootFlags flags)1184 void Runtime::VisitRoots(RootCallback* callback, void* arg, VisitRootFlags flags) {
1185 VisitNonConcurrentRoots(callback, arg);
1186 VisitConcurrentRoots(callback, arg, flags);
1187 }
1188
CreateDefaultImt(ClassLinker * cl)1189 mirror::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
CreateImtConflictMethod()1201 mirror::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
CreateResolutionMethod()1225 mirror::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
CreateCalleeSaveMethod(CalleeSaveType type)1249 mirror::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
DisallowNewSystemWeaks()1266 void Runtime::DisallowNewSystemWeaks() {
1267 monitor_list_->DisallowNewMonitors();
1268 intern_table_->DisallowNewInterns();
1269 java_vm_->DisallowNewWeakGlobals();
1270 }
1271
AllowNewSystemWeaks()1272 void Runtime::AllowNewSystemWeaks() {
1273 monitor_list_->AllowNewMonitors();
1274 intern_table_->AllowNewInterns();
1275 java_vm_->AllowNewWeakGlobals();
1276 }
1277
SetInstructionSet(InstructionSet instruction_set)1278 void 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
SetCalleeSaveMethod(mirror::ArtMethod * method,CalleeSaveType type)1310 void 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
GetCompileTimeClassPath(jobject class_loader)1315 const 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
SetCompileTimeClassPath(jobject class_loader,std::vector<const DexFile * > & class_path)1325 void 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
AddMethodVerifier(verifier::MethodVerifier * verifier)1332 void Runtime::AddMethodVerifier(verifier::MethodVerifier* verifier) {
1333 DCHECK(verifier != nullptr);
1334 MutexLock mu(Thread::Current(), method_verifier_lock_);
1335 method_verifiers_.insert(verifier);
1336 }
1337
RemoveMethodVerifier(verifier::MethodVerifier * verifier)1338 void 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
StartProfiler(const char * profile_output_filename)1346 void 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.
EnterTransactionMode(Transaction * transaction)1353 void Runtime::EnterTransactionMode(Transaction* transaction) {
1354 DCHECK(IsCompiler());
1355 DCHECK(transaction != nullptr);
1356 DCHECK(!IsActiveTransaction());
1357 preinitialization_transaction_ = transaction;
1358 }
1359
ExitTransactionMode()1360 void Runtime::ExitTransactionMode() {
1361 DCHECK(IsCompiler());
1362 DCHECK(IsActiveTransaction());
1363 preinitialization_transaction_ = nullptr;
1364 }
1365
RecordWriteField32(mirror::Object * obj,MemberOffset field_offset,uint32_t value,bool is_volatile) const1366 void 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
RecordWriteField64(mirror::Object * obj,MemberOffset field_offset,uint64_t value,bool is_volatile) const1373 void 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
RecordWriteFieldReference(mirror::Object * obj,MemberOffset field_offset,mirror::Object * value,bool is_volatile) const1380 void 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
RecordWriteArray(mirror::Array * array,size_t index,uint64_t value) const1387 void 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
RecordStrongStringInsertion(mirror::String * s) const1393 void Runtime::RecordStrongStringInsertion(mirror::String* s) const {
1394 DCHECK(IsCompiler());
1395 DCHECK(IsActiveTransaction());
1396 preinitialization_transaction_->RecordStrongStringInsertion(s);
1397 }
1398
RecordWeakStringInsertion(mirror::String * s) const1399 void Runtime::RecordWeakStringInsertion(mirror::String* s) const {
1400 DCHECK(IsCompiler());
1401 DCHECK(IsActiveTransaction());
1402 preinitialization_transaction_->RecordWeakStringInsertion(s);
1403 }
1404
RecordStrongStringRemoval(mirror::String * s) const1405 void Runtime::RecordStrongStringRemoval(mirror::String* s) const {
1406 DCHECK(IsCompiler());
1407 DCHECK(IsActiveTransaction());
1408 preinitialization_transaction_->RecordStrongStringRemoval(s);
1409 }
1410
RecordWeakStringRemoval(mirror::String * s) const1411 void Runtime::RecordWeakStringRemoval(mirror::String* s) const {
1412 DCHECK(IsCompiler());
1413 DCHECK(IsActiveTransaction());
1414 preinitialization_transaction_->RecordWeakStringRemoval(s);
1415 }
1416
SetFaultMessage(const std::string & message)1417 void Runtime::SetFaultMessage(const std::string& message) {
1418 MutexLock mu(Thread::Current(), fault_message_lock_);
1419 fault_message_ = message;
1420 }
1421
AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string> * argv) const1422 void 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
UpdateProfilerState(int state)1440 void Runtime::UpdateProfilerState(int state) {
1441 VLOG(profiler) << "Profiler state updated to " << state;
1442 }
1443 } // namespace art
1444