runtime.h revision 507e6180ad271eb719c67ce7394852c731d975a5
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#ifndef ART_RUNTIME_RUNTIME_H_ 18#define ART_RUNTIME_RUNTIME_H_ 19 20#include <jni.h> 21#include <stdio.h> 22 23#include <iosfwd> 24#include <set> 25#include <string> 26#include <utility> 27#include <vector> 28 29#include "compiler_callbacks.h" 30#include "gc_root.h" 31#include "instrumentation.h" 32#include "instruction_set.h" 33#include "jobject_comparator.h" 34#include "nativebridge/native_bridge.h" 35#include "object_callbacks.h" 36#include "offsets.h" 37#include "profiler_options.h" 38#include "quick/quick_method_frame_info.h" 39#include "runtime_stats.h" 40#include "safe_map.h" 41 42namespace art { 43 44namespace gc { 45 class Heap; 46} // namespace gc 47namespace mirror { 48 class ArtMethod; 49 class ClassLoader; 50 class Array; 51 template<class T> class ObjectArray; 52 template<class T> class PrimitiveArray; 53 typedef PrimitiveArray<int8_t> ByteArray; 54 class String; 55 class Throwable; 56} // namespace mirror 57namespace verifier { 58class MethodVerifier; 59} 60class ClassLinker; 61class DexFile; 62class InternTable; 63class JavaVMExt; 64class MonitorList; 65class MonitorPool; 66class NullPointerHandler; 67class SignalCatcher; 68class StackOverflowHandler; 69class SuspensionHandler; 70class ThreadList; 71class Trace; 72class Transaction; 73 74typedef std::vector<std::pair<std::string, const void*>> RuntimeOptions; 75 76// Not all combinations of flags are valid. You may not visit all roots as well as the new roots 77// (no logical reason to do this). You also may not start logging new roots and stop logging new 78// roots (also no logical reason to do this). 79enum VisitRootFlags : uint8_t { 80 kVisitRootFlagAllRoots = 0x1, 81 kVisitRootFlagNewRoots = 0x2, 82 kVisitRootFlagStartLoggingNewRoots = 0x4, 83 kVisitRootFlagStopLoggingNewRoots = 0x8, 84 kVisitRootFlagClearRootLog = 0x10, 85}; 86 87class Runtime { 88 public: 89 // Creates and initializes a new runtime. 90 static bool Create(const RuntimeOptions& options, bool ignore_unrecognized) 91 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 92 93 bool IsCompiler() const { 94 return compiler_callbacks_ != nullptr; 95 } 96 97 bool CanRelocate() const { 98 return !IsCompiler() || compiler_callbacks_->IsRelocationPossible(); 99 } 100 101 bool ShouldRelocate() const { 102 return must_relocate_ && CanRelocate(); 103 } 104 105 bool MustRelocateIfPossible() const { 106 return must_relocate_; 107 } 108 109 bool IsDex2OatEnabled() const { 110 return dex2oat_enabled_ && IsImageDex2OatEnabled(); 111 } 112 113 bool IsImageDex2OatEnabled() const { 114 return image_dex2oat_enabled_; 115 } 116 117 CompilerCallbacks* GetCompilerCallbacks() { 118 return compiler_callbacks_; 119 } 120 121 bool IsZygote() const { 122 return is_zygote_; 123 } 124 125 bool IsExplicitGcDisabled() const { 126 return is_explicit_gc_disabled_; 127 } 128 129 std::string GetCompilerExecutable() const; 130 std::string GetPatchoatExecutable() const; 131 132 const std::vector<std::string>& GetCompilerOptions() const { 133 return compiler_options_; 134 } 135 136 const std::vector<std::string>& GetImageCompilerOptions() const { 137 return image_compiler_options_; 138 } 139 140 const ProfilerOptions& GetProfilerOptions() const { 141 return profiler_options_; 142 } 143 144 // Starts a runtime, which may cause threads to be started and code to run. 145 bool Start() UNLOCK_FUNCTION(Locks::mutator_lock_); 146 147 bool IsShuttingDown(Thread* self); 148 bool IsShuttingDownLocked() const EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) { 149 return shutting_down_; 150 } 151 152 size_t NumberOfThreadsBeingBorn() const EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) { 153 return threads_being_born_; 154 } 155 156 void StartThreadBirth() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) { 157 threads_being_born_++; 158 } 159 160 void EndThreadBirth() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_); 161 162 bool IsStarted() const { 163 return started_; 164 } 165 166 bool IsFinishedStarting() const { 167 return finished_starting_; 168 } 169 170 static Runtime* Current() { 171 return instance_; 172 } 173 174 // Aborts semi-cleanly. Used in the implementation of LOG(FATAL), which most 175 // callers should prefer. 176 // This isn't marked ((noreturn)) because then gcc will merge multiple calls 177 // in a single function together. This reduces code size slightly, but means 178 // that the native stack trace we get may point at the wrong call site. 179 static void Abort() LOCKS_EXCLUDED(Locks::abort_lock_); 180 181 // Returns the "main" ThreadGroup, used when attaching user threads. 182 jobject GetMainThreadGroup() const; 183 184 // Returns the "system" ThreadGroup, used when attaching our internal threads. 185 jobject GetSystemThreadGroup() const; 186 187 // Returns the system ClassLoader which represents the CLASSPATH. 188 jobject GetSystemClassLoader() const; 189 190 // Attaches the calling native thread to the runtime. 191 bool AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group, 192 bool create_peer); 193 194 void CallExitHook(jint status); 195 196 // Detaches the current native thread from the runtime. 197 void DetachCurrentThread() LOCKS_EXCLUDED(Locks::mutator_lock_); 198 199 void DumpForSigQuit(std::ostream& os) 200 EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_); 201 void DumpLockHolders(std::ostream& os); 202 203 ~Runtime(); 204 205 const std::string& GetBootClassPathString() const { 206 return boot_class_path_string_; 207 } 208 209 const std::string& GetClassPathString() const { 210 return class_path_string_; 211 } 212 213 ClassLinker* GetClassLinker() const { 214 return class_linker_; 215 } 216 217 size_t GetDefaultStackSize() const { 218 return default_stack_size_; 219 } 220 221 gc::Heap* GetHeap() const { 222 return heap_; 223 } 224 225 InternTable* GetInternTable() const { 226 DCHECK(intern_table_ != NULL); 227 return intern_table_; 228 } 229 230 JavaVMExt* GetJavaVM() const { 231 return java_vm_; 232 } 233 234 size_t GetMaxSpinsBeforeThinkLockInflation() const { 235 return max_spins_before_thin_lock_inflation_; 236 } 237 238 MonitorList* GetMonitorList() const { 239 return monitor_list_; 240 } 241 242 MonitorPool* GetMonitorPool() const { 243 return monitor_pool_; 244 } 245 246 mirror::Throwable* GetPreAllocatedOutOfMemoryError() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 247 248 const std::vector<std::string>& GetProperties() const { 249 return properties_; 250 } 251 252 ThreadList* GetThreadList() const { 253 return thread_list_; 254 } 255 256 static const char* GetVersion() { 257 return "2.1.0"; 258 } 259 260 void DisallowNewSystemWeaks() EXCLUSIVE_LOCKS_REQUIRED(Locks::mutator_lock_); 261 void AllowNewSystemWeaks() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 262 263 // Visit all the roots. If only_dirty is true then non-dirty roots won't be visited. If 264 // clean_dirty is true then dirty roots will be marked as non-dirty after visiting. 265 void VisitRoots(RootCallback* visitor, void* arg, VisitRootFlags flags = kVisitRootFlagAllRoots) 266 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 267 268 // Visit all of the roots we can do safely do concurrently. 269 void VisitConcurrentRoots(RootCallback* visitor, void* arg, 270 VisitRootFlags flags = kVisitRootFlagAllRoots) 271 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 272 273 // Visit all of the non thread roots, we can do this with mutators unpaused. 274 void VisitNonThreadRoots(RootCallback* visitor, void* arg) 275 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 276 277 // Visit all other roots which must be done with mutators suspended. 278 void VisitNonConcurrentRoots(RootCallback* visitor, void* arg) 279 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 280 281 // Sweep system weaks, the system weak is deleted if the visitor return nullptr. Otherwise, the 282 // system weak is updated to be the visitor's returned value. 283 void SweepSystemWeaks(IsMarkedCallback* visitor, void* arg) 284 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 285 286 // Constant roots are the roots which never change after the runtime is initialized, they only 287 // need to be visited once per GC cycle. 288 void VisitConstantRoots(RootCallback* callback, void* arg) 289 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 290 291 // Returns a special method that calls into a trampoline for runtime method resolution 292 mirror::ArtMethod* GetResolutionMethod() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 293 294 bool HasResolutionMethod() const { 295 return !resolution_method_.IsNull(); 296 } 297 298 void SetResolutionMethod(mirror::ArtMethod* method) { 299 resolution_method_ = GcRoot<mirror::ArtMethod>(method); 300 } 301 302 mirror::ArtMethod* CreateResolutionMethod() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 303 304 // Returns a special method that calls into a trampoline for runtime imt conflicts. 305 mirror::ArtMethod* GetImtConflictMethod() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 306 307 bool HasImtConflictMethod() const { 308 return !imt_conflict_method_.IsNull(); 309 } 310 311 void SetImtConflictMethod(mirror::ArtMethod* method) { 312 imt_conflict_method_ = GcRoot<mirror::ArtMethod>(method); 313 } 314 315 mirror::ArtMethod* CreateImtConflictMethod() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 316 317 // Returns an imt with every entry set to conflict, used as default imt for all classes. 318 mirror::ObjectArray<mirror::ArtMethod>* GetDefaultImt() 319 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 320 321 bool HasDefaultImt() const { 322 return !default_imt_.IsNull(); 323 } 324 325 void SetDefaultImt(mirror::ObjectArray<mirror::ArtMethod>* imt) { 326 default_imt_ = GcRoot<mirror::ObjectArray<mirror::ArtMethod>>(imt); 327 } 328 329 mirror::ObjectArray<mirror::ArtMethod>* CreateDefaultImt(ClassLinker* cl) 330 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 331 332 // Returns a special method that describes all callee saves being spilled to the stack. 333 enum CalleeSaveType { 334 kSaveAll, 335 kRefsOnly, 336 kRefsAndArgs, 337 kLastCalleeSaveType // Value used for iteration 338 }; 339 340 bool HasCalleeSaveMethod(CalleeSaveType type) const { 341 return !callee_save_methods_[type].IsNull(); 342 } 343 344 mirror::ArtMethod* GetCalleeSaveMethod(CalleeSaveType type) 345 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 346 347 mirror::ArtMethod* GetCalleeSaveMethodUnchecked(CalleeSaveType type) 348 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 349 350 QuickMethodFrameInfo GetCalleeSaveMethodFrameInfo(CalleeSaveType type) const { 351 return callee_save_method_frame_infos_[type]; 352 } 353 354 QuickMethodFrameInfo GetRuntimeMethodFrameInfo(mirror::ArtMethod* method) 355 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 356 357 static size_t GetCalleeSaveMethodOffset(CalleeSaveType type) { 358 return OFFSETOF_MEMBER(Runtime, callee_save_methods_[type]); 359 } 360 361 InstructionSet GetInstructionSet() const { 362 return instruction_set_; 363 } 364 365 void SetInstructionSet(InstructionSet instruction_set); 366 367 void SetCalleeSaveMethod(mirror::ArtMethod* method, CalleeSaveType type); 368 369 mirror::ArtMethod* CreateCalleeSaveMethod(CalleeSaveType type) 370 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 371 372 int32_t GetStat(int kind); 373 374 RuntimeStats* GetStats() { 375 return &stats_; 376 } 377 378 bool HasStatsEnabled() const { 379 return stats_enabled_; 380 } 381 382 void ResetStats(int kinds); 383 384 void SetStatsEnabled(bool new_state); 385 386 void PreZygoteFork(); 387 bool InitZygote(); 388 void DidForkFromZygote(); 389 390 const instrumentation::Instrumentation* GetInstrumentation() const { 391 return &instrumentation_; 392 } 393 394 instrumentation::Instrumentation* GetInstrumentation() { 395 return &instrumentation_; 396 } 397 398 bool UseCompileTimeClassPath() const { 399 return use_compile_time_class_path_; 400 } 401 402 void AddMethodVerifier(verifier::MethodVerifier* verifier) LOCKS_EXCLUDED(method_verifier_lock_); 403 void RemoveMethodVerifier(verifier::MethodVerifier* verifier) 404 LOCKS_EXCLUDED(method_verifier_lock_); 405 406 const std::vector<const DexFile*>& GetCompileTimeClassPath(jobject class_loader); 407 void SetCompileTimeClassPath(jobject class_loader, std::vector<const DexFile*>& class_path); 408 409 void StartProfiler(const char* profile_output_filename); 410 void UpdateProfilerState(int state); 411 412 // Transaction support. 413 bool IsActiveTransaction() const { 414 return preinitialization_transaction_ != nullptr; 415 } 416 void EnterTransactionMode(Transaction* transaction); 417 void ExitTransactionMode(); 418 void RecordWriteField32(mirror::Object* obj, MemberOffset field_offset, uint32_t value, 419 bool is_volatile) const; 420 void RecordWriteField64(mirror::Object* obj, MemberOffset field_offset, uint64_t value, 421 bool is_volatile) const; 422 void RecordWriteFieldReference(mirror::Object* obj, MemberOffset field_offset, 423 mirror::Object* value, bool is_volatile) const; 424 void RecordWriteArray(mirror::Array* array, size_t index, uint64_t value) const 425 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 426 void RecordStrongStringInsertion(mirror::String* s, uint32_t hash_code) const 427 EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_); 428 void RecordWeakStringInsertion(mirror::String* s, uint32_t hash_code) const 429 EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_); 430 void RecordStrongStringRemoval(mirror::String* s, uint32_t hash_code) const 431 EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_); 432 void RecordWeakStringRemoval(mirror::String* s, uint32_t hash_code) const 433 EXCLUSIVE_LOCKS_REQUIRED(Locks::intern_table_lock_); 434 435 void SetFaultMessage(const std::string& message); 436 // Only read by the signal handler, NO_THREAD_SAFETY_ANALYSIS to prevent lock order violations 437 // with the unexpected_signal_lock_. 438 const std::string& GetFaultMessage() NO_THREAD_SAFETY_ANALYSIS { 439 return fault_message_; 440 } 441 442 void AddCurrentRuntimeFeaturesAsDex2OatArguments(std::vector<std::string>* arg_vector) const; 443 444 bool ExplicitNullChecks() const { 445 return null_pointer_handler_ == nullptr; 446 } 447 448 bool ExplicitSuspendChecks() const { 449 return suspend_handler_ == nullptr; 450 } 451 452 bool ExplicitStackOverflowChecks() const { 453 return stack_overflow_handler_ == nullptr; 454 } 455 456 bool IsVerificationEnabled() const { 457 return verify_; 458 } 459 460 bool RunningOnValgrind() const { 461 return running_on_valgrind_; 462 } 463 464 void SetTargetSdkVersion(int32_t version) { 465 target_sdk_version_ = version; 466 } 467 468 int32_t GetTargetSdkVersion() const { 469 return target_sdk_version_; 470 } 471 472 static const char* GetDefaultInstructionSetFeatures() { 473 return kDefaultInstructionSetFeatures; 474 } 475 476 private: 477 static void InitPlatformSignalHandlers(); 478 479 Runtime(); 480 481 void BlockSignals(); 482 483 bool Init(const RuntimeOptions& options, bool ignore_unrecognized) 484 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 485 void InitNativeMethods() LOCKS_EXCLUDED(Locks::mutator_lock_); 486 void InitThreadGroups(Thread* self); 487 void RegisterRuntimeNativeMethods(JNIEnv* env); 488 489 void StartDaemonThreads(); 490 void StartSignalCatcher(); 491 492 // A pointer to the active runtime or NULL. 493 static Runtime* instance_; 494 495 static const char* kDefaultInstructionSetFeatures; 496 497 // NOTE: these must match the gc::ProcessState values as they come directly from the framework. 498 static constexpr int kProfileForground = 0; 499 static constexpr int kProfileBackgrouud = 1; 500 501 GcRoot<mirror::ArtMethod> callee_save_methods_[kLastCalleeSaveType]; 502 GcRoot<mirror::Throwable> pre_allocated_OutOfMemoryError_; 503 GcRoot<mirror::ArtMethod> resolution_method_; 504 GcRoot<mirror::ArtMethod> imt_conflict_method_; 505 GcRoot<mirror::ObjectArray<mirror::ArtMethod>> default_imt_; 506 507 InstructionSet instruction_set_; 508 QuickMethodFrameInfo callee_save_method_frame_infos_[kLastCalleeSaveType]; 509 510 CompilerCallbacks* compiler_callbacks_; 511 bool is_zygote_; 512 bool must_relocate_; 513 bool is_concurrent_gc_enabled_; 514 bool is_explicit_gc_disabled_; 515 bool dex2oat_enabled_; 516 bool image_dex2oat_enabled_; 517 518 std::string compiler_executable_; 519 std::string patchoat_executable_; 520 std::vector<std::string> compiler_options_; 521 std::vector<std::string> image_compiler_options_; 522 523 std::string boot_class_path_string_; 524 std::string class_path_string_; 525 std::vector<std::string> properties_; 526 527 // The default stack size for managed threads created by the runtime. 528 size_t default_stack_size_; 529 530 gc::Heap* heap_; 531 532 // The number of spins that are done before thread suspension is used to forcibly inflate. 533 size_t max_spins_before_thin_lock_inflation_; 534 MonitorList* monitor_list_; 535 MonitorPool* monitor_pool_; 536 537 ThreadList* thread_list_; 538 539 InternTable* intern_table_; 540 541 ClassLinker* class_linker_; 542 543 SignalCatcher* signal_catcher_; 544 std::string stack_trace_file_; 545 546 JavaVMExt* java_vm_; 547 548 // Fault message, printed when we get a SIGSEGV. 549 Mutex fault_message_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; 550 std::string fault_message_ GUARDED_BY(fault_message_lock_); 551 552 // Method verifier set, used so that we can update their GC roots. 553 Mutex method_verifier_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER; 554 std::set<verifier::MethodVerifier*> method_verifiers_; 555 556 // A non-zero value indicates that a thread has been created but not yet initialized. Guarded by 557 // the shutdown lock so that threads aren't born while we're shutting down. 558 size_t threads_being_born_ GUARDED_BY(Locks::runtime_shutdown_lock_); 559 560 // Waited upon until no threads are being born. 561 std::unique_ptr<ConditionVariable> shutdown_cond_ GUARDED_BY(Locks::runtime_shutdown_lock_); 562 563 // Set when runtime shutdown is past the point that new threads may attach. 564 bool shutting_down_ GUARDED_BY(Locks::runtime_shutdown_lock_); 565 566 // The runtime is starting to shutdown but is blocked waiting on shutdown_cond_. 567 bool shutting_down_started_ GUARDED_BY(Locks::runtime_shutdown_lock_); 568 569 bool started_; 570 571 // New flag added which tells us if the runtime has finished starting. If 572 // this flag is set then the Daemon threads are created and the class loader 573 // is created. This flag is needed for knowing if its safe to request CMS. 574 bool finished_starting_; 575 576 // Hooks supported by JNI_CreateJavaVM 577 jint (*vfprintf_)(FILE* stream, const char* format, va_list ap); 578 void (*exit_)(jint status); 579 void (*abort_)(); 580 581 bool stats_enabled_; 582 RuntimeStats stats_; 583 584 const bool running_on_valgrind_; 585 586 std::string profile_output_filename_; 587 ProfilerOptions profiler_options_; 588 bool profiler_started_; 589 590 bool method_trace_; 591 std::string method_trace_file_; 592 size_t method_trace_file_size_; 593 instrumentation::Instrumentation instrumentation_; 594 595 typedef SafeMap<jobject, std::vector<const DexFile*>, JobjectComparator> CompileTimeClassPaths; 596 CompileTimeClassPaths compile_time_class_paths_; 597 bool use_compile_time_class_path_; 598 599 jobject main_thread_group_; 600 jobject system_thread_group_; 601 602 // As returned by ClassLoader.getSystemClassLoader(). 603 jobject system_class_loader_; 604 605 // If true, then we dump the GC cumulative timings on shutdown. 606 bool dump_gc_performance_on_shutdown_; 607 608 // Transaction used for pre-initializing classes at compilation time. 609 Transaction* preinitialization_transaction_; 610 NullPointerHandler* null_pointer_handler_; 611 SuspensionHandler* suspend_handler_; 612 StackOverflowHandler* stack_overflow_handler_; 613 614 // If false, verification is disabled. True by default. 615 bool verify_; 616 617 // Specifies target SDK version to allow workarounds for certain API levels. 618 int32_t target_sdk_version_; 619 620 // Implicit checks flags. 621 bool implicit_null_checks_; // NullPointer checks are implicit. 622 bool implicit_so_checks_; // StackOverflow checks are implicit. 623 bool implicit_suspend_checks_; // Thread suspension checks are implicit. 624 625 // The filename to the native bridge library. If this is not empty the native bridge will be 626 // initialized and loaded from the given file (initialized and available). An empty value means 627 // that there's no native bridge (initialized but not available). 628 // 629 // The native bridge allows running native code compiled for a foreign ISA. The way it works is, 630 // if standard dlopen fails to load native library associated with native activity, it calls to 631 // the native bridge to load it and then gets the trampoline for the entry to native activity. 632 std::string native_bridge_library_filename_; 633 634 // Native bridge library runtime callbacks. They represent the runtime interface to native bridge. 635 // 636 // The interface is expected to expose the following methods: 637 // getMethodShorty(): in the case of native method calling JNI native function CallXXXXMethodY(), 638 // native bridge calls back to VM for the shorty of the method so that it can prepare based on 639 // host calling convention. 640 // getNativeMethodCount() and getNativeMethods(): in case of JNI function UnregisterNatives(), 641 // native bridge can call back to get all native methods of specified class so that all 642 // corresponding trampolines can be destroyed. 643 android::NativeBridgeRuntimeCallbacks native_bridge_art_callbacks_; 644 645 DISALLOW_COPY_AND_ASSIGN(Runtime); 646}; 647 648} // namespace art 649 650#endif // ART_RUNTIME_RUNTIME_H_ 651