1 /* 2 * Copyright (C) 2008 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 /* 18 * Variables with library scope. 19 * 20 * Prefer this over scattered static and global variables -- it's easier to 21 * view the state in a debugger, it makes clean shutdown simpler, we can 22 * trivially dump the state into a crash log, and it dodges most naming 23 * collisions that will arise when we are embedded in a larger program. 24 * 25 * If we want multiple VMs per process, this can get stuffed into TLS (or 26 * accessed through a Thread field). May need to pass it around for some 27 * of the early initialization functions. 28 */ 29 #ifndef DALVIK_GLOBALS_H_ 30 #define DALVIK_GLOBALS_H_ 31 32 #include <string> 33 #include <vector> 34 35 #include <stdarg.h> 36 #include <pthread.h> 37 38 /* private structures */ 39 struct GcHeap; 40 struct BreakpointSet; 41 struct InlineSub; 42 43 /* 44 * One of these for each -ea/-da/-esa/-dsa on the command line. 45 */ 46 struct AssertionControl { 47 char* pkgOrClass; /* package/class string, or NULL for esa/dsa */ 48 int pkgOrClassLen; /* string length, for quick compare */ 49 bool enable; /* enable or disable */ 50 bool isPackage; /* string ended with "..."? */ 51 }; 52 53 /* 54 * Register map generation mode. Only applicable when generateRegisterMaps 55 * is enabled. (The "disabled" state is not folded into this because 56 * there are callers like dexopt that want to enable/disable without 57 * specifying the configuration details.) 58 * 59 * "TypePrecise" is slower and requires additional storage for the register 60 * maps, but allows type-precise GC. "LivePrecise" is even slower and 61 * requires additional heap during processing, but allows live-precise GC. 62 */ 63 enum RegisterMapMode { 64 kRegisterMapModeUnknown = 0, 65 kRegisterMapModeTypePrecise, 66 kRegisterMapModeLivePrecise 67 }; 68 69 /* 70 * Profiler clock source. 71 */ 72 enum ProfilerClockSource { 73 kProfilerClockSourceThreadCpu, 74 kProfilerClockSourceWall, 75 kProfilerClockSourceDual, 76 }; 77 78 /* 79 * All fields are initialized to zero. 80 * 81 * Storage allocated here must be freed by a subsystem shutdown function. 82 */ 83 struct DvmGlobals { 84 /* 85 * Some options from the command line or environment. 86 */ 87 char* bootClassPathStr; 88 char* classPathStr; 89 90 size_t heapStartingSize; 91 size_t heapMaximumSize; 92 size_t heapGrowthLimit; 93 bool lowMemoryMode; 94 double heapTargetUtilization; 95 size_t heapMinFree; 96 size_t heapMaxFree; 97 size_t stackSize; 98 size_t mainThreadStackSize; 99 100 bool verboseGc; 101 bool verboseJni; 102 bool verboseClass; 103 bool verboseShutdown; 104 105 bool jdwpAllowed; // debugging allowed for this process? 106 bool jdwpConfigured; // has debugging info been provided? 107 JdwpTransportType jdwpTransport; 108 bool jdwpServer; 109 char* jdwpHost; 110 int jdwpPort; 111 bool jdwpSuspend; 112 113 ProfilerClockSource profilerClockSource; 114 115 /* 116 * Lock profiling threshold value in milliseconds. Acquires that 117 * exceed threshold are logged. Acquires within the threshold are 118 * logged with a probability of $\frac{time}{threshold}$ . If the 119 * threshold is unset no additional logging occurs. 120 */ 121 u4 lockProfThreshold; 122 123 int (*vfprintfHook)(FILE*, const char*, va_list); 124 void (*exitHook)(int); 125 void (*abortHook)(void); 126 bool (*isSensitiveThreadHook)(void); 127 128 char* jniTrace; 129 bool reduceSignals; 130 bool noQuitHandler; 131 bool verifyDexChecksum; 132 char* stackTraceFile; // for SIGQUIT-inspired output 133 134 bool logStdio; 135 136 DexOptimizerMode dexOptMode; 137 DexClassVerifyMode classVerifyMode; 138 139 bool generateRegisterMaps; 140 RegisterMapMode registerMapMode; 141 142 bool monitorVerification; 143 144 bool dexOptForSmp; 145 146 /* 147 * GC option flags. 148 */ 149 bool preciseGc; 150 bool preVerify; 151 bool postVerify; 152 bool concurrentMarkSweep; 153 bool verifyCardTable; 154 bool disableExplicitGc; 155 156 int assertionCtrlCount; 157 AssertionControl* assertionCtrl; 158 159 ExecutionMode executionMode; 160 161 bool commonInit; /* whether common stubs are generated */ 162 bool constInit; /* whether global constants are initialized */ 163 164 /* 165 * VM init management. 166 */ 167 bool initializing; 168 bool optimizing; 169 170 /* 171 * java.lang.System properties set from the command line with -D. 172 * This is effectively a set, where later entries override earlier 173 * ones. 174 */ 175 std::vector<std::string>* properties; 176 177 /* 178 * Where the VM goes to find system classes. 179 */ 180 ClassPathEntry* bootClassPath; 181 /* used by the DEX optimizer to load classes from an unfinished DEX */ 182 DvmDex* bootClassPathOptExtra; 183 bool optimizingBootstrapClass; 184 185 /* 186 * Loaded classes, hashed by class name. Each entry is a ClassObject*, 187 * allocated in GC space. 188 */ 189 HashTable* loadedClasses; 190 191 /* 192 * Value for the next class serial number to be assigned. This is 193 * incremented as we load classes. Failed loads and races may result 194 * in some numbers being skipped, and the serial number is not 195 * guaranteed to start at 1, so the current value should not be used 196 * as a count of loaded classes. 197 */ 198 volatile int classSerialNumber; 199 200 /* 201 * Classes with a low classSerialNumber are probably in the zygote, and 202 * their InitiatingLoaderList is not used, to promote sharing. The list is 203 * kept here instead. 204 */ 205 InitiatingLoaderList* initiatingLoaderList; 206 207 /* 208 * Interned strings. 209 */ 210 211 /* A mutex that guards access to the interned string tables. */ 212 pthread_mutex_t internLock; 213 214 /* Hash table of strings interned by the user. */ 215 HashTable* internedStrings; 216 217 /* Hash table of strings interned by the class loader. */ 218 HashTable* literalStrings; 219 220 /* 221 * Classes constructed directly by the vm. 222 */ 223 224 /* the class Class */ 225 ClassObject* classJavaLangClass; 226 227 /* synthetic classes representing primitive types */ 228 ClassObject* typeVoid; 229 ClassObject* typeBoolean; 230 ClassObject* typeByte; 231 ClassObject* typeShort; 232 ClassObject* typeChar; 233 ClassObject* typeInt; 234 ClassObject* typeLong; 235 ClassObject* typeFloat; 236 ClassObject* typeDouble; 237 238 /* synthetic classes for arrays of primitives */ 239 ClassObject* classArrayBoolean; 240 ClassObject* classArrayByte; 241 ClassObject* classArrayShort; 242 ClassObject* classArrayChar; 243 ClassObject* classArrayInt; 244 ClassObject* classArrayLong; 245 ClassObject* classArrayFloat; 246 ClassObject* classArrayDouble; 247 248 /* 249 * Quick lookups for popular classes used internally. 250 */ 251 ClassObject* classJavaLangClassArray; 252 ClassObject* classJavaLangClassLoader; 253 ClassObject* classJavaLangObject; 254 ClassObject* classJavaLangObjectArray; 255 ClassObject* classJavaLangString; 256 ClassObject* classJavaLangThread; 257 ClassObject* classJavaLangVMThread; 258 ClassObject* classJavaLangThreadGroup; 259 ClassObject* classJavaLangStackTraceElement; 260 ClassObject* classJavaLangStackTraceElementArray; 261 ClassObject* classJavaLangAnnotationAnnotationArray; 262 ClassObject* classJavaLangAnnotationAnnotationArrayArray; 263 ClassObject* classJavaLangReflectAccessibleObject; 264 ClassObject* classJavaLangReflectConstructor; 265 ClassObject* classJavaLangReflectConstructorArray; 266 ClassObject* classJavaLangReflectField; 267 ClassObject* classJavaLangReflectFieldArray; 268 ClassObject* classJavaLangReflectMethod; 269 ClassObject* classJavaLangReflectMethodArray; 270 ClassObject* classJavaLangReflectProxy; 271 ClassObject* classJavaLangSystem; 272 ClassObject* classJavaNioDirectByteBuffer; 273 ClassObject* classLibcoreReflectAnnotationFactory; 274 ClassObject* classLibcoreReflectAnnotationMember; 275 ClassObject* classLibcoreReflectAnnotationMemberArray; 276 ClassObject* classOrgApacheHarmonyDalvikDdmcChunk; 277 ClassObject* classOrgApacheHarmonyDalvikDdmcDdmServer; 278 ClassObject* classJavaLangRefFinalizerReference; 279 280 /* 281 * classes representing exception types. The names here don't include 282 * packages, just to keep the use sites a bit less verbose. All are 283 * in java.lang, except where noted. 284 */ 285 ClassObject* exAbstractMethodError; 286 ClassObject* exArithmeticException; 287 ClassObject* exArrayIndexOutOfBoundsException; 288 ClassObject* exArrayStoreException; 289 ClassObject* exClassCastException; 290 ClassObject* exClassCircularityError; 291 ClassObject* exClassFormatError; 292 ClassObject* exClassNotFoundException; 293 ClassObject* exError; 294 ClassObject* exExceptionInInitializerError; 295 ClassObject* exFileNotFoundException; /* in java.io */ 296 ClassObject* exIOException; /* in java.io */ 297 ClassObject* exIllegalAccessError; 298 ClassObject* exIllegalAccessException; 299 ClassObject* exIllegalArgumentException; 300 ClassObject* exIllegalMonitorStateException; 301 ClassObject* exIllegalStateException; 302 ClassObject* exIllegalThreadStateException; 303 ClassObject* exIncompatibleClassChangeError; 304 ClassObject* exInstantiationError; 305 ClassObject* exInstantiationException; 306 ClassObject* exInternalError; 307 ClassObject* exInterruptedException; 308 ClassObject* exLinkageError; 309 ClassObject* exNegativeArraySizeException; 310 ClassObject* exNoClassDefFoundError; 311 ClassObject* exNoSuchFieldError; 312 ClassObject* exNoSuchFieldException; 313 ClassObject* exNoSuchMethodError; 314 ClassObject* exNullPointerException; 315 ClassObject* exOutOfMemoryError; 316 ClassObject* exRuntimeException; 317 ClassObject* exStackOverflowError; 318 ClassObject* exStaleDexCacheError; /* in dalvik.system */ 319 ClassObject* exStringIndexOutOfBoundsException; 320 ClassObject* exThrowable; 321 ClassObject* exTypeNotPresentException; 322 ClassObject* exUnsatisfiedLinkError; 323 ClassObject* exUnsupportedOperationException; 324 ClassObject* exVerifyError; 325 ClassObject* exVirtualMachineError; 326 327 /* method offsets - Object */ 328 int voffJavaLangObject_equals; 329 int voffJavaLangObject_hashCode; 330 int voffJavaLangObject_toString; 331 332 /* field offsets - String */ 333 int offJavaLangString_value; 334 int offJavaLangString_count; 335 int offJavaLangString_offset; 336 int offJavaLangString_hashCode; 337 338 /* field offsets - Thread */ 339 int offJavaLangThread_vmThread; 340 int offJavaLangThread_group; 341 int offJavaLangThread_daemon; 342 int offJavaLangThread_name; 343 int offJavaLangThread_priority; 344 int offJavaLangThread_uncaughtHandler; 345 int offJavaLangThread_contextClassLoader; 346 347 /* method offsets - Thread */ 348 int voffJavaLangThread_run; 349 350 /* field offsets - ThreadGroup */ 351 int offJavaLangThreadGroup_name; 352 int offJavaLangThreadGroup_parent; 353 354 /* field offsets - VMThread */ 355 int offJavaLangVMThread_thread; 356 int offJavaLangVMThread_vmData; 357 358 /* method offsets - ThreadGroup */ 359 int voffJavaLangThreadGroup_removeThread; 360 361 /* field offsets - Throwable */ 362 int offJavaLangThrowable_stackState; 363 int offJavaLangThrowable_cause; 364 365 /* method offsets - ClassLoader */ 366 int voffJavaLangClassLoader_loadClass; 367 368 /* direct method pointers - ClassLoader */ 369 Method* methJavaLangClassLoader_getSystemClassLoader; 370 371 /* field offsets - java.lang.reflect.* */ 372 int offJavaLangReflectConstructor_slot; 373 int offJavaLangReflectConstructor_declClass; 374 int offJavaLangReflectField_slot; 375 int offJavaLangReflectField_declClass; 376 int offJavaLangReflectMethod_slot; 377 int offJavaLangReflectMethod_declClass; 378 379 /* field offsets - java.lang.ref.Reference */ 380 int offJavaLangRefReference_referent; 381 int offJavaLangRefReference_queue; 382 int offJavaLangRefReference_queueNext; 383 int offJavaLangRefReference_pendingNext; 384 385 /* field offsets - java.lang.ref.FinalizerReference */ 386 int offJavaLangRefFinalizerReference_zombie; 387 388 /* method pointers - java.lang.ref.ReferenceQueue */ 389 Method* methJavaLangRefReferenceQueueAdd; 390 391 /* method pointers - java.lang.ref.FinalizerReference */ 392 Method* methJavaLangRefFinalizerReferenceAdd; 393 394 /* constructor method pointers; no vtable involved, so use Method* */ 395 Method* methJavaLangStackTraceElement_init; 396 Method* methJavaLangReflectConstructor_init; 397 Method* methJavaLangReflectField_init; 398 Method* methJavaLangReflectMethod_init; 399 Method* methOrgApacheHarmonyLangAnnotationAnnotationMember_init; 400 401 /* static method pointers - android.lang.annotation.* */ 402 Method* 403 methOrgApacheHarmonyLangAnnotationAnnotationFactory_createAnnotation; 404 405 /* direct method pointers - java.lang.reflect.Proxy */ 406 Method* methJavaLangReflectProxy_constructorPrototype; 407 408 /* field offsets - java.lang.reflect.Proxy */ 409 int offJavaLangReflectProxy_h; 410 411 /* direct method pointer - java.lang.System.runFinalization */ 412 Method* methJavaLangSystem_runFinalization; 413 414 /* field offsets - java.io.FileDescriptor */ 415 int offJavaIoFileDescriptor_descriptor; 416 417 /* direct method pointers - dalvik.system.NativeStart */ 418 Method* methDalvikSystemNativeStart_main; 419 Method* methDalvikSystemNativeStart_run; 420 421 /* assorted direct buffer helpers */ 422 Method* methJavaNioDirectByteBuffer_init; 423 int offJavaNioBuffer_capacity; 424 int offJavaNioBuffer_effectiveDirectAddress; 425 426 /* direct method pointers - org.apache.harmony.dalvik.ddmc.DdmServer */ 427 Method* methDalvikDdmcServer_dispatch; 428 Method* methDalvikDdmcServer_broadcast; 429 430 /* field offsets - org.apache.harmony.dalvik.ddmc.Chunk */ 431 int offDalvikDdmcChunk_type; 432 int offDalvikDdmcChunk_data; 433 int offDalvikDdmcChunk_offset; 434 int offDalvikDdmcChunk_length; 435 436 /* 437 * Thread list. This always has at least one element in it (main), 438 * and main is always the first entry. 439 * 440 * The threadListLock is used for several things, including the thread 441 * start condition variable. Generally speaking, you must hold the 442 * threadListLock when: 443 * - adding/removing items from the list 444 * - waiting on or signaling threadStartCond 445 * - examining the Thread struct for another thread (this is to avoid 446 * one thread freeing the Thread struct while another thread is 447 * perusing it) 448 */ 449 Thread* threadList; 450 pthread_mutex_t threadListLock; 451 452 pthread_cond_t threadStartCond; 453 454 /* 455 * The thread code grabs this before suspending all threads. There 456 * are a few things that can cause a "suspend all": 457 * (1) the GC is starting; 458 * (2) the debugger has sent a "suspend all" request; 459 * (3) a thread has hit a breakpoint or exception that the debugger 460 * has marked as a "suspend all" event; 461 * (4) the SignalCatcher caught a signal that requires suspension. 462 * (5) (if implemented) the JIT needs to perform a heavyweight 463 * rearrangement of the translation cache or JitTable. 464 * 465 * Because we use "safe point" self-suspension, it is never safe to 466 * do a blocking "lock" call on this mutex -- if it has been acquired, 467 * somebody is probably trying to put you to sleep. The leading '_' is 468 * intended as a reminder that this lock is special. 469 */ 470 pthread_mutex_t _threadSuspendLock; 471 472 /* 473 * Guards Thread->suspendCount for all threads, and 474 * provides the lock for the condition variable that all suspended threads 475 * sleep on (threadSuspendCountCond). 476 * 477 * This has to be separate from threadListLock because of the way 478 * threads put themselves to sleep. 479 */ 480 pthread_mutex_t threadSuspendCountLock; 481 482 /* 483 * Suspended threads sleep on this. They should sleep on the condition 484 * variable until their "suspend count" is zero. 485 * 486 * Paired with "threadSuspendCountLock". 487 */ 488 pthread_cond_t threadSuspendCountCond; 489 490 /* 491 * Sum of all threads' suspendCount fields. Guarded by 492 * threadSuspendCountLock. 493 */ 494 int sumThreadSuspendCount; 495 496 /* 497 * MUTEX ORDERING: when locking multiple mutexes, always grab them in 498 * this order to avoid deadlock: 499 * 500 * (1) _threadSuspendLock (use lockThreadSuspend()) 501 * (2) threadListLock (use dvmLockThreadList()) 502 * (3) threadSuspendCountLock (use lockThreadSuspendCount()) 503 */ 504 505 506 /* 507 * Thread ID bitmap. We want threads to have small integer IDs so 508 * we can use them in "thin locks". 509 */ 510 BitVector* threadIdMap; 511 512 /* 513 * Manage exit conditions. The VM exits when all non-daemon threads 514 * have exited. If the main thread returns early, we need to sleep 515 * on a condition variable. 516 */ 517 int nonDaemonThreadCount; /* must hold threadListLock to access */ 518 pthread_cond_t vmExitCond; 519 520 /* 521 * The set of DEX files loaded by custom class loaders. 522 */ 523 HashTable* userDexFiles; 524 525 /* 526 * JNI global reference table. 527 */ 528 IndirectRefTable jniGlobalRefTable; 529 IndirectRefTable jniWeakGlobalRefTable; 530 pthread_mutex_t jniGlobalRefLock; 531 pthread_mutex_t jniWeakGlobalRefLock; 532 533 /* 534 * JNI pinned object table (used for primitive arrays). 535 */ 536 ReferenceTable jniPinRefTable; 537 pthread_mutex_t jniPinRefLock; 538 539 /* 540 * Native shared library table. 541 */ 542 HashTable* nativeLibs; 543 544 /* 545 * GC heap lock. Functions like gcMalloc() acquire this before making 546 * any changes to the heap. It is held throughout garbage collection. 547 */ 548 pthread_mutex_t gcHeapLock; 549 550 /* 551 * Condition variable to queue threads waiting to retry an 552 * allocation. Signaled after a concurrent GC is completed. 553 */ 554 pthread_cond_t gcHeapCond; 555 556 /* Opaque pointer representing the heap. */ 557 GcHeap* gcHeap; 558 559 /* The card table base, modified as needed for marking cards. */ 560 u1* biasedCardTableBase; 561 562 /* 563 * Pre-allocated throwables. 564 */ 565 Object* outOfMemoryObj; 566 Object* internalErrorObj; 567 Object* noClassDefFoundErrorObj; 568 569 /* Monitor list, so we can free them */ 570 /*volatile*/ Monitor* monitorList; 571 572 /* Monitor for Thread.sleep() implementation */ 573 Monitor* threadSleepMon; 574 575 /* set when we create a second heap inside the zygote */ 576 bool newZygoteHeapAllocated; 577 578 /* 579 * TLS keys. 580 */ 581 pthread_key_t pthreadKeySelf; /* Thread*, for dvmThreadSelf */ 582 583 /* 584 * Cache results of "A instanceof B". 585 */ 586 AtomicCache* instanceofCache; 587 588 /* inline substitution table, used during optimization */ 589 InlineSub* inlineSubs; 590 591 /* 592 * Bootstrap class loader linear allocator. 593 */ 594 LinearAllocHdr* pBootLoaderAlloc; 595 596 /* 597 * Compute some stats on loaded classes. 598 */ 599 int numLoadedClasses; 600 int numDeclaredMethods; 601 int numDeclaredInstFields; 602 int numDeclaredStaticFields; 603 604 /* when using a native debugger, set this to suppress watchdog timers */ 605 bool nativeDebuggerActive; 606 607 /* 608 * JDWP debugger support. 609 * 610 * Note: Each thread will normally determine whether the debugger is active 611 * for it by referring to its subMode flags. "debuggerActive" here should be 612 * seen as "debugger is making requests of 1 or more threads". 613 */ 614 bool debuggerConnected; /* debugger or DDMS is connected */ 615 bool debuggerActive; /* debugger is making requests */ 616 JdwpState* jdwpState; 617 618 /* 619 * Registry of objects known to the debugger. 620 */ 621 HashTable* dbgRegistry; 622 623 /* 624 * Debugger breakpoint table. 625 */ 626 BreakpointSet* breakpointSet; 627 628 /* 629 * Single-step control struct. We currently only allow one thread to 630 * be single-stepping at a time, which is all that really makes sense, 631 * but it's possible we may need to expand this to be per-thread. 632 */ 633 StepControl stepControl; 634 635 /* 636 * DDM features embedded in the VM. 637 */ 638 bool ddmThreadNotification; 639 640 /* 641 * Zygote (partially-started process) support 642 */ 643 bool zygote; 644 645 /* 646 * Used for tracking allocations that we report to DDMS. When the feature 647 * is enabled (through a DDMS request) the "allocRecords" pointer becomes 648 * non-NULL. 649 */ 650 pthread_mutex_t allocTrackerLock; 651 AllocRecord* allocRecords; 652 int allocRecordHead; /* most-recently-added entry */ 653 int allocRecordCount; /* #of valid entries */ 654 int allocRecordMax; /* Number of allocated entries. */ 655 656 /* 657 * When a profiler is enabled, this is incremented. Distinct profilers 658 * include "dmtrace" method tracing, emulator method tracing, and 659 * possibly instruction counting. 660 * 661 * The purpose of this is to have a single value that shows whether any 662 * profiling is going on. Individual thread will normally check their 663 * thread-private subMode flags to take any profiling action. 664 */ 665 volatile int activeProfilers; 666 667 /* 668 * State for method-trace profiling. 669 */ 670 MethodTraceState methodTrace; 671 Method* methodTraceGcMethod; 672 Method* methodTraceClassPrepMethod; 673 674 /* 675 * State for emulator tracing. 676 */ 677 void* emulatorTracePage; 678 int emulatorTraceEnableCount; 679 680 /* 681 * Global state for memory allocation profiling. 682 */ 683 AllocProfState allocProf; 684 685 /* 686 * Pointers to the original methods for things that have been inlined. 687 * This makes it easy for us to output method entry/exit records for 688 * the method calls we're not actually making. (Used by method 689 * profiling.) 690 */ 691 Method** inlinedMethods; 692 693 /* 694 * Dalvik instruction counts (kNumPackedOpcodes entries). 695 */ 696 int* executedInstrCounts; 697 int instructionCountEnableCount; 698 699 /* 700 * Signal catcher thread (for SIGQUIT). 701 */ 702 pthread_t signalCatcherHandle; 703 bool haltSignalCatcher; 704 705 /* 706 * Stdout/stderr conversion thread. 707 */ 708 bool haltStdioConverter; 709 bool stdioConverterReady; 710 pthread_t stdioConverterHandle; 711 pthread_mutex_t stdioConverterLock; 712 pthread_cond_t stdioConverterCond; 713 int stdoutPipe[2]; 714 int stderrPipe[2]; 715 716 /* 717 * pid of the system_server process. We track it so that when system server 718 * crashes the Zygote process will be killed and restarted. 719 */ 720 pid_t systemServerPid; 721 722 int kernelGroupScheduling; 723 724 //#define COUNT_PRECISE_METHODS 725 #ifdef COUNT_PRECISE_METHODS 726 PointerSet* preciseMethods; 727 #endif 728 729 /* some RegisterMap statistics, useful during development */ 730 void* registerMapStats; 731 732 #ifdef VERIFIER_STATS 733 VerifierStats verifierStats; 734 #endif 735 736 /* String pointed here will be deposited on the stack frame of dvmAbort */ 737 const char *lastMessage; 738 }; 739 740 extern struct DvmGlobals gDvm; 741 742 #if defined(WITH_JIT) 743 744 #define DEFAULT_CODE_CACHE_SIZE 0xffffffff 745 746 /* Trace profiling modes. Ordering matters - off states before on states */ 747 enum TraceProfilingModes { 748 kTraceProfilingDisabled = 0, // Not profiling 749 kTraceProfilingPeriodicOff = 1, // Periodic profiling, off phase 750 kTraceProfilingContinuous = 2, // Always profiling 751 kTraceProfilingPeriodicOn = 3 // Periodic profiling, on phase 752 }; 753 754 /* 755 * Exiting the compiled code w/o chaining will incur overhead to look up the 756 * target in the code cache which is extra work only when JIT is enabled. So 757 * we want to monitor it closely to make sure we don't have performance bugs. 758 */ 759 enum NoChainExits { 760 kInlineCacheMiss = 0, 761 kCallsiteInterpreted, 762 kSwitchOverflow, 763 kHeavyweightMonitor, 764 kNoChainExitLast, 765 }; 766 767 /* 768 * JIT-specific global state 769 */ 770 struct DvmJitGlobals { 771 /* 772 * Guards writes to Dalvik PC (dPC), translated code address (codeAddr) and 773 * chain fields within the JIT hash table. Note carefully the access 774 * mechanism. 775 * Only writes are guarded, and the guarded fields must be updated in a 776 * specific order using atomic operations. Further, once a field is 777 * written it cannot be changed without halting all threads. 778 * 779 * The write order is: 780 * 1) codeAddr 781 * 2) dPC 782 * 3) chain [if necessary] 783 * 784 * This mutex also guards both read and write of curJitTableEntries. 785 */ 786 pthread_mutex_t tableLock; 787 788 /* The JIT hash table. Note that for access speed, copies of this pointer 789 * are stored in each thread. */ 790 struct JitEntry *pJitEntryTable; 791 792 /* Array of compilation trigger threshold counters */ 793 unsigned char *pProfTable; 794 795 /* Trace profiling counters */ 796 struct JitTraceProfCounters *pJitTraceProfCounters; 797 798 /* Copy of pProfTable used for temporarily disabling the Jit */ 799 unsigned char *pProfTableCopy; 800 801 /* Size of JIT hash table in entries. Must be a power of 2 */ 802 unsigned int jitTableSize; 803 804 /* Mask used in hash function for JitTable. Should be jitTableSize-1 */ 805 unsigned int jitTableMask; 806 807 /* How many entries in the JitEntryTable are in use */ 808 unsigned int jitTableEntriesUsed; 809 810 /* Max bytes allocated for the code cache. Rough rule of thumb: 1K per 1M of system RAM */ 811 unsigned int codeCacheSize; 812 813 /* Trigger for trace selection */ 814 unsigned short threshold; 815 816 /* JIT Compiler Control */ 817 bool haltCompilerThread; 818 bool blockingMode; 819 bool methodTraceSupport; 820 bool genSuspendPoll; 821 Thread* compilerThread; 822 pthread_t compilerHandle; 823 pthread_mutex_t compilerLock; 824 pthread_mutex_t compilerICPatchLock; 825 pthread_cond_t compilerQueueActivity; 826 pthread_cond_t compilerQueueEmpty; 827 volatile int compilerQueueLength; 828 int compilerHighWater; 829 int compilerWorkEnqueueIndex; 830 int compilerWorkDequeueIndex; 831 int compilerICPatchIndex; 832 833 /* JIT internal stats */ 834 int compilerMaxQueued; 835 int translationChains; 836 837 /* Compiled code cache */ 838 void* codeCache; 839 840 /* 841 * This is used to store the base address of an in-flight compilation whose 842 * class object pointers have been calculated to populate literal pool. 843 * Once the compiler thread has changed its status to VM_WAIT, we cannot 844 * guarantee whether GC has happened before the code address has been 845 * installed to the JIT table. Because of that, this field can only 846 * been cleared/overwritten by the compiler thread if it is in the 847 * THREAD_RUNNING state or in a safe point. 848 */ 849 void *inflightBaseAddr; 850 851 /* Translation cache version (protected by compilerLock */ 852 int cacheVersion; 853 854 /* Bytes used by the code templates */ 855 unsigned int templateSize; 856 857 /* Bytes already used in the code cache */ 858 unsigned int codeCacheByteUsed; 859 860 /* Number of installed compilations in the cache */ 861 unsigned int numCompilations; 862 863 /* Flag to indicate that the code cache is full */ 864 bool codeCacheFull; 865 866 /* Page size - 1 */ 867 unsigned int pageSizeMask; 868 869 /* Lock to change the protection type of the code cache */ 870 pthread_mutex_t codeCacheProtectionLock; 871 872 /* Number of times that the code cache has been reset */ 873 int numCodeCacheReset; 874 875 /* Number of times that the code cache reset request has been delayed */ 876 int numCodeCacheResetDelayed; 877 878 /* true/false: compile/reject opcodes specified in the -Xjitop list */ 879 bool includeSelectedOp; 880 881 /* true/false: compile/reject methods specified in the -Xjitmethod list */ 882 bool includeSelectedMethod; 883 884 /* true/false: compile/reject traces with offset specified in the -Xjitoffset list */ 885 bool includeSelectedOffset; 886 887 /* Disable JIT for selected opcodes - one bit for each opcode */ 888 char opList[(kNumPackedOpcodes+7)/8]; 889 890 /* Disable JIT for selected methods */ 891 HashTable *methodTable; 892 893 /* Disable JIT for selected classes */ 894 HashTable *classTable; 895 896 /* Disable JIT for selected offsets */ 897 unsigned int pcTable[COMPILER_PC_OFFSET_SIZE]; 898 int num_entries_pcTable; 899 900 /* Flag to dump all compiled code */ 901 bool printMe; 902 903 /* Flag to dump compiled binary code in bytes */ 904 bool printBinary; 905 906 /* Per-process debug flag toggled when receiving a SIGUSR2 */ 907 bool receivedSIGUSR2; 908 909 /* Trace profiling mode */ 910 TraceProfilingModes profileMode; 911 912 /* Periodic trace profiling countdown timer */ 913 int profileCountdown; 914 915 /* Vector to disable selected optimizations */ 916 int disableOpt; 917 918 /* Table to track the overall and trace statistics of hot methods */ 919 HashTable* methodStatsTable; 920 921 /* Filter method compilation blacklist with call-graph information */ 922 bool checkCallGraph; 923 924 /* New translation chain has been set up */ 925 volatile bool hasNewChain; 926 927 #if defined(WITH_SELF_VERIFICATION) 928 /* Spin when error is detected, volatile so GDB can reset it */ 929 volatile bool selfVerificationSpin; 930 #endif 931 932 /* Framework or stand-alone? */ 933 bool runningInAndroidFramework; 934 935 /* Framework callback happened? */ 936 bool alreadyEnabledViaFramework; 937 938 /* Framework requests to disable the JIT for good */ 939 bool disableJit; 940 941 #if defined(SIGNATURE_BREAKPOINT) 942 /* Signature breakpoint */ 943 u4 signatureBreakpointSize; // # of words 944 u4 *signatureBreakpoint; // Signature content 945 #endif 946 947 #if defined(WITH_JIT_TUNING) 948 /* Performance tuning counters */ 949 int addrLookupsFound; 950 int addrLookupsNotFound; 951 int noChainExit[kNoChainExitLast]; 952 int normalExit; 953 int puntExit; 954 int invokeMonomorphic; 955 int invokePolymorphic; 956 int invokeNative; 957 int invokeMonoGetterInlined; 958 int invokeMonoSetterInlined; 959 int invokePolyGetterInlined; 960 int invokePolySetterInlined; 961 int returnOp; 962 int icPatchInit; 963 int icPatchLockFree; 964 int icPatchQueued; 965 int icPatchRejected; 966 int icPatchDropped; 967 int codeCachePatches; 968 int numCompilerThreadBlockGC; 969 u8 jitTime; 970 u8 compilerThreadBlockGCStart; 971 u8 compilerThreadBlockGCTime; 972 u8 maxCompilerThreadBlockGCTime; 973 #endif 974 975 #if defined(ARCH_IA32) 976 JitOptLevel optLevel; 977 #endif 978 979 /* Place arrays at the end to ease the display in gdb sessions */ 980 981 /* Work order queue for compilations */ 982 CompilerWorkOrder compilerWorkQueue[COMPILER_WORK_QUEUE_SIZE]; 983 984 /* Work order queue for predicted chain patching */ 985 ICPatchWorkOrder compilerICPatchQueue[COMPILER_IC_PATCH_QUEUE_SIZE]; 986 }; 987 988 extern struct DvmJitGlobals gDvmJit; 989 990 #if defined(WITH_JIT_TUNING) 991 extern int gDvmICHitCount; 992 #endif 993 994 #endif 995 996 struct DvmJniGlobals { 997 bool useCheckJni; 998 bool warnOnly; 999 bool forceCopy; 1000 1001 // Provide backwards compatibility for pre-ICS apps on ICS. 1002 bool workAroundAppJniBugs; 1003 1004 // Debugging help for third-party developers. Similar to -Xjnitrace. 1005 bool logThirdPartyJni; 1006 1007 // We only support a single JavaVM per process. 1008 JavaVM* jniVm; 1009 }; 1010 1011 extern struct DvmJniGlobals gDvmJni; 1012 1013 #endif // DALVIK_GLOBALS_H_ 1014
