runtime.h revision 858f1c5fd5e528d0b16040ced74d4636046a42d8
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_SRC_RUNTIME_H_ 18#define ART_SRC_RUNTIME_H_ 19 20#include <jni.h> 21#include <stdio.h> 22 23#include <iosfwd> 24#include <string> 25#include <utility> 26#include <vector> 27 28#include "globals.h" 29#include "heap.h" 30#include "instruction_set.h" 31#include "jobject_comparator.h" 32#include "macros.h" 33#include "locks.h" 34#include "runtime_stats.h" 35#include "safe_map.h" 36#include "stringpiece.h" 37 38#if defined(ART_USE_LLVM_COMPILER) 39#include "compiler_llvm/procedure_linkage_table.h" 40#endif 41 42namespace art { 43 44template<class T> class PrimitiveArray; 45typedef PrimitiveArray<int8_t> ByteArray; 46class ClassLinker; 47class ClassLoader; 48class DexFile; 49class Heap; 50class InternTable; 51struct JavaVMExt; 52class AbstractMethod; 53class MonitorList; 54class SignalCatcher; 55class String; 56class ThreadList; 57class Throwable; 58class Trace; 59 60class Runtime { 61 public: 62 typedef std::vector<std::pair<std::string, const void*> > Options; 63 64 class ParsedOptions { 65 public: 66 // returns null if problem parsing and ignore_unrecognized is false 67 static ParsedOptions* Create(const Options& options, bool ignore_unrecognized); 68 69 const std::vector<const DexFile*>* boot_class_path_; 70 std::string boot_class_path_string_; 71 std::string class_path_string_; 72 std::string host_prefix_; 73 std::string image_; 74 bool check_jni_; 75 std::string jni_trace_; 76 bool is_compiler_; 77 bool is_zygote_; 78 bool is_concurrent_gc_enabled_; 79 size_t heap_initial_size_; 80 size_t heap_maximum_size_; 81 size_t heap_growth_limit_; 82 size_t heap_min_free_; 83 size_t heap_max_free_; 84 double heap_target_utilization_; 85 size_t stack_size_; 86 size_t jni_globals_max_; 87 size_t lock_profiling_threshold_; 88 std::string stack_trace_file_; 89 bool method_trace_; 90 std::string method_trace_file_; 91 size_t method_trace_file_size_; 92 bool (*hook_is_sensitive_thread_)(); 93 jint (*hook_vfprintf_)(FILE* stream, const char* format, va_list ap); 94 void (*hook_exit_)(jint status); 95 void (*hook_abort_)(); 96 std::vector<std::string> properties_; 97 98 private: 99 ParsedOptions() {} 100 }; 101 102 // Creates and initializes a new runtime. 103 static bool Create(const Options& options, bool ignore_unrecognized) 104 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 105 106 bool IsCompiler() const { 107 return is_compiler_; 108 } 109 110 bool IsZygote() const { 111 return is_zygote_; 112 } 113 114 bool IsConcurrentGcEnabled() const { 115 return is_concurrent_gc_enabled_; 116 } 117 118 const std::string& GetHostPrefix() const { 119 DCHECK(!IsStarted()); 120 return host_prefix_; 121 } 122 123 // Starts a runtime, which may cause threads to be started and code to run. 124 void Start() UNLOCK_FUNCTION(Locks::mutator_lock_); 125 126 bool IsShuttingDown() const EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) { 127 return shutting_down_; 128 } 129 130 size_t NumberOfThreadsBeingBorn() const EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) { 131 return threads_being_born_; 132 } 133 134 void StartThreadBirth() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_) { 135 threads_being_born_++; 136 } 137 138 void EndThreadBirth() EXCLUSIVE_LOCKS_REQUIRED(Locks::runtime_shutdown_lock_); 139 140 bool IsStarted() const { 141 return started_; 142 } 143 144 bool IsFinishedStarting() const { 145 return finished_starting_; 146 } 147 148 static Runtime* Current() { 149 return instance_; 150 } 151 152 // Aborts semi-cleanly. Used in the implementation of LOG(FATAL), which most 153 // callers should prefer. 154 // This isn't marked ((noreturn)) because then gcc will merge multiple calls 155 // in a single function together. This reduces code size slightly, but means 156 // that the native stack trace we get may point at the wrong call site. 157 static void Abort() LOCKS_EXCLUDED(Locks::abort_lock_); 158 159 // Returns the "main" ThreadGroup, used when attaching user threads. 160 jobject GetMainThreadGroup() const; 161 162 // Returns the "system" ThreadGroup, used when attaching our internal threads. 163 jobject GetSystemThreadGroup() const; 164 165 // Attaches the calling native thread to the runtime. 166 bool AttachCurrentThread(const char* thread_name, bool as_daemon, jobject thread_group); 167 168 void CallExitHook(jint status); 169 170 // Detaches the current native thread from the runtime. 171 void DetachCurrentThread() LOCKS_EXCLUDED(Locks::mutator_lock_); 172 173 void DumpForSigQuit(std::ostream& os) 174 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 175 void DumpLockHolders(std::ostream& os); 176 177 ~Runtime(); 178 179 const std::string& GetBootClassPathString() const { 180 return boot_class_path_string_; 181 } 182 183 const std::string& GetClassPathString() const { 184 return class_path_string_; 185 } 186 187 ClassLinker* GetClassLinker() const { 188 return class_linker_; 189 } 190 191 size_t GetDefaultStackSize() const { 192 return default_stack_size_; 193 } 194 195 Heap* GetHeap() const { 196 return heap_; 197 } 198 199 InternTable* GetInternTable() const { 200 return intern_table_; 201 } 202 203 JavaVMExt* GetJavaVM() const { 204 return java_vm_; 205 } 206 207 MonitorList* GetMonitorList() const { 208 return monitor_list_; 209 } 210 211 Throwable* GetPreAllocatedOutOfMemoryError() { 212 return pre_allocated_OutOfMemoryError_; 213 } 214 215 const std::vector<std::string>& GetProperties() const { 216 return properties_; 217 } 218 219 ThreadList* GetThreadList() const { 220 return thread_list_; 221 } 222 223 const char* GetVersion() const { 224 return "2.0.0"; 225 } 226 227 // Force all the roots which can be marked concurrently to be dirty. 228 void DirtyRoots(); 229 230 // Visit all the roots. 231 void VisitRoots(Heap::RootVisitor* visitor, void* arg) 232 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 233 234 // Visit all of the roots we can do safely do concurrently. 235 void VisitConcurrentRoots(Heap::RootVisitor* visitor, void* arg); 236 237 // Visit all of the non thread roots, we can do this with mutators unpaused. 238 void VisitNonThreadRoots(Heap::RootVisitor* visitor, void* arg); 239 240 // Visit all other roots which must be done with mutators suspended. 241 void VisitNonConcurrentRoots(Heap::RootVisitor* visitor, void* arg) 242 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 243 244 bool HasJniDlsymLookupStub() const { 245 return jni_stub_array_ != NULL; 246 } 247 248 ByteArray* GetJniDlsymLookupStub() const { 249 CHECK(HasJniDlsymLookupStub()); 250 return jni_stub_array_; 251 } 252 253 void SetJniDlsymLookupStub(ByteArray* jni_stub_array); 254 255 bool HasAbstractMethodErrorStubArray() const { 256 return abstract_method_error_stub_array_ != NULL; 257 } 258 259 ByteArray* GetAbstractMethodErrorStubArray() const { 260 CHECK(abstract_method_error_stub_array_ != NULL); 261 return abstract_method_error_stub_array_; 262 } 263 264 void SetAbstractMethodErrorStubArray(ByteArray* abstract_method_error_stub_array); 265 266 enum TrampolineType { 267 kStaticMethod, 268 kUnknownMethod, 269 kLastTrampolineMethodType // Value used for iteration 270 }; 271 272 bool HasResolutionStubArray(TrampolineType type) const { 273 return resolution_stub_array_[type] != NULL; 274 } 275 276 ByteArray* GetResolutionStubArray(TrampolineType type) const { 277 CHECK(HasResolutionStubArray(type)); 278 DCHECK_LT(static_cast<int>(type), static_cast<int>(kLastTrampolineMethodType)); 279 return resolution_stub_array_[type]; 280 } 281 282 void SetResolutionStubArray(ByteArray* resolution_stub_array, TrampolineType type); 283 284 // Returns a special method that calls into a trampoline for runtime method resolution 285 AbstractMethod* GetResolutionMethod() const { 286 CHECK(HasResolutionMethod()); 287 return resolution_method_; 288 } 289 290 bool HasResolutionMethod() const { 291 return resolution_method_ != NULL; 292 } 293 294 void SetResolutionMethod(AbstractMethod* method) { 295 resolution_method_ = method; 296 } 297 298 AbstractMethod* CreateResolutionMethod() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 299 300 // Returns a special method that describes all callee saves being spilled to the stack. 301 enum CalleeSaveType { 302 kSaveAll, 303 kRefsOnly, 304 kRefsAndArgs, 305 kLastCalleeSaveType // Value used for iteration 306 }; 307 308 bool HasCalleeSaveMethod(CalleeSaveType type) const { 309 return callee_save_methods_[type] != NULL; 310 } 311 312 AbstractMethod* GetCalleeSaveMethod(CalleeSaveType type) const { 313 CHECK(HasCalleeSaveMethod(type)); 314 return callee_save_methods_[type]; 315 } 316 317 void SetCalleeSaveMethod(AbstractMethod* method, CalleeSaveType type); 318 319 AbstractMethod* CreateCalleeSaveMethod(InstructionSet instruction_set, CalleeSaveType type) 320 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 321 322 AbstractMethod* CreateRefOnlyCalleeSaveMethod(InstructionSet instruction_set) 323 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 324 325 AbstractMethod* CreateRefAndArgsCalleeSaveMethod(InstructionSet instruction_set) 326 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 327 328 int32_t GetStat(int kind); 329 330 RuntimeStats* GetStats() { 331 return &stats_; 332 } 333 334 bool HasStatsEnabled() const { 335 return stats_enabled_; 336 } 337 338 void ResetStats(int kinds); 339 340 void SetStatsEnabled(bool new_state); 341 342 void DidForkFromZygote(); 343 bool PreZygoteFork(); 344 345 void EnableMethodTracing(Trace* tracer); 346 void DisableMethodTracing(); 347 348 bool IsMethodTracingActive() const { 349 return tracer_ != NULL; 350 } 351 352 Trace* GetTracer() const { 353 CHECK(IsMethodTracingActive()); 354 return tracer_; 355 } 356 357 bool UseCompileTimeClassPath() const { 358 return use_compile_time_class_path_; 359 } 360 361 const std::vector<const DexFile*>& GetCompileTimeClassPath(jobject class_loader); 362 void SetCompileTimeClassPath(jobject class_loader, std::vector<const DexFile*>& class_path); 363 364 private: 365 static void InitPlatformSignalHandlers(); 366 367 Runtime(); 368 369 void BlockSignals(); 370 371 bool Init(const Options& options, bool ignore_unrecognized) 372 SHARED_TRYLOCK_FUNCTION(true, Locks::mutator_lock_); 373 void InitNativeMethods() LOCKS_EXCLUDED(Locks::mutator_lock_); 374 void InitThreadGroups(Thread* self); 375 void RegisterRuntimeNativeMethods(JNIEnv* env); 376 377 void StartDaemonThreads(); 378 void StartSignalCatcher(); 379 380 // A pointer to the active runtime or NULL. 381 static Runtime* instance_; 382 383 bool is_compiler_; 384 bool is_zygote_; 385 bool is_concurrent_gc_enabled_; 386 387 // The host prefix is used during cross compilation. It is removed 388 // from the start of host paths such as: 389 // $ANDROID_PRODUCT_OUT/system/framework/boot.oat 390 // to produce target paths such as 391 // /system/framework/boot.oat 392 // Similarly it is prepended to target paths to arrive back at a 393 // host past. In both cases this is necessary because image and oat 394 // files embedded expect paths of dependent files (an image points 395 // to an oat file and an oat files to one or more dex files). These 396 // files contain the expected target path. 397 std::string host_prefix_; 398 399 std::string boot_class_path_string_; 400 std::string class_path_string_; 401 std::vector<std::string> properties_; 402 403 // The default stack size for managed threads created by the runtime. 404 size_t default_stack_size_; 405 406 Heap* heap_; 407 408 MonitorList* monitor_list_; 409 410 ThreadList* thread_list_; 411 412 InternTable* intern_table_; 413 414 ClassLinker* class_linker_; 415 416 SignalCatcher* signal_catcher_; 417 std::string stack_trace_file_; 418 419 JavaVMExt* java_vm_; 420 421 Throwable* pre_allocated_OutOfMemoryError_; 422 423 ByteArray* jni_stub_array_; 424 425 ByteArray* abstract_method_error_stub_array_; 426 427 ByteArray* resolution_stub_array_[kLastTrampolineMethodType]; 428 429 AbstractMethod* callee_save_methods_[kLastCalleeSaveType]; 430 431 AbstractMethod* resolution_method_; 432 433 // As returned by ClassLoader.getSystemClassLoader() 434 ClassLoader* system_class_loader_; 435 436 // A non-zero value indicates that a thread has been created but not yet initialized. Guarded by 437 // the shutdown lock so that threads aren't born while we're shutting down. 438 size_t threads_being_born_ GUARDED_BY(Locks::runtime_shutdown_lock_); 439 440 // Waited upon until no threads are being born. 441 UniquePtr<ConditionVariable> shutdown_cond_ GUARDED_BY(Locks::runtime_shutdown_lock_); 442 443 // Set when runtime shutdown is past the point that new threads may attach. 444 bool shutting_down_ GUARDED_BY(Locks::runtime_shutdown_lock_); 445 446 // The runtime is starting to shutdown but is blocked waiting on shutdown_cond_. 447 bool shutting_down_started_ GUARDED_BY(Locks::runtime_shutdown_lock_); 448 449 bool started_; 450 451 // New flag added which tells us if the runtime has finished starting. If 452 // this flag is set then the Daemon threads are created and the class loader 453 // is created. This flag is needed for knowing if its safe to request CMS. 454 bool finished_starting_; 455 456 // Hooks supported by JNI_CreateJavaVM 457 jint (*vfprintf_)(FILE* stream, const char* format, va_list ap); 458 void (*exit_)(jint status); 459 void (*abort_)(); 460 461 bool stats_enabled_; 462 RuntimeStats stats_; 463 464 bool method_trace_; 465 std::string method_trace_file_; 466 size_t method_trace_file_size_; 467 Trace* tracer_; 468 469 typedef SafeMap<jobject, std::vector<const DexFile*>, JobjectComparator> CompileTimeClassPaths; 470 CompileTimeClassPaths compile_time_class_paths_; 471 bool use_compile_time_class_path_; 472 473 jobject main_thread_group_; 474 jobject system_thread_group_; 475#if defined(ART_USE_LLVM_COMPILER) 476 compiler_llvm::ProcedureLinkageTable plt_; 477#endif 478 479 DISALLOW_COPY_AND_ASSIGN(Runtime); 480}; 481 482} // namespace art 483 484#endif // ART_SRC_RUNTIME_H_ 485