Globals.h revision 8552f4498a720a6fcb34ebab69d6e3c34bee491d 
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
30#define _DALVIK_GLOBALS
31
32#include <stdarg.h>
33#include <pthread.h>
34
35#define MAX_BREAKPOINTS 20      /* used for a debugger optimization */
36
37/* private structures */
38typedef struct GcHeap GcHeap;
39typedef struct BreakpointSet BreakpointSet;
40typedef struct InlineSub InlineSub;
41
42/*
43 * One of these for each -ea/-da/-esa/-dsa on the command line.
44 */
45typedef struct AssertionControl {
46    char*   pkgOrClass;         /* package/class string, or NULL for esa/dsa */
47    int     pkgOrClassLen;      /* string length, for quick compare */
48    bool    enable;             /* enable or disable */
49    bool    isPackage;          /* string ended with "..."? */
50} AssertionControl;
51
52/*
53 * Execution mode, e.g. interpreter vs. JIT.
54 */
55typedef enum ExecutionMode {
56    kExecutionModeUnknown = 0,
57    kExecutionModeInterpPortable,
58    kExecutionModeInterpFast,
59#if defined(WITH_JIT)
60    kExecutionModeJit,
61#endif
62} ExecutionMode;
63
64/*
65 * All fields are initialized to zero.
66 *
67 * Storage allocated here must be freed by a subsystem shutdown function or
68 * from within freeGlobals().
69 */
70struct DvmGlobals {
71    /*
72     * Some options from the command line or environment.
73     */
74    char*       bootClassPathStr;
75    char*       classPathStr;
76
77    unsigned int    heapSizeStart;
78    unsigned int    heapSizeMax;
79    unsigned int    stackSize;
80
81    bool        verboseGc;
82    bool        verboseJni;
83    bool        verboseClass;
84    bool        verboseShutdown;
85
86    bool        jdwpAllowed;        // debugging allowed for this process?
87    bool        jdwpConfigured;     // has debugging info been provided?
88    int         jdwpTransport;
89    bool        jdwpServer;
90    char*       jdwpHost;
91    int         jdwpPort;
92    bool        jdwpSuspend;
93
94    /* use wall clock as method profiler clock source? */
95    bool        profilerWallClock;
96
97    /*
98     * Lock profiling threshold value in milliseconds.  Acquires that
99     * exceed threshold are logged.  Acquires within the threshold are
100     * logged with a probability of $\frac{time}{threshold}$ .  If the
101     * threshold is unset no additional logging occurs.
102     */
103    u4          lockProfThreshold;
104
105    int         (*vfprintfHook)(FILE*, const char*, va_list);
106    void        (*exitHook)(int);
107    void        (*abortHook)(void);
108
109    int         jniGrefLimit;       // 0 means no limit
110    char*       jniTrace;
111    bool        reduceSignals;
112    bool        noQuitHandler;
113    bool        verifyDexChecksum;
114    char*       stackTraceFile;     // for SIGQUIT-inspired output
115
116    bool        logStdio;
117
118    DexOptimizerMode    dexOptMode;
119    DexClassVerifyMode  classVerifyMode;
120
121    bool        dexOptForSmp;
122
123    /*
124     * GC option flags.
125     */
126    bool        preciseGc;
127    bool        preVerify;
128    bool        postVerify;
129    bool        generateRegisterMaps;
130    bool        concurrentMarkSweep;
131    bool        verifyCardTable;
132
133    int         assertionCtrlCount;
134    AssertionControl*   assertionCtrl;
135
136    ExecutionMode   executionMode;
137
138    /*
139     * VM init management.
140     */
141    bool        initializing;
142    int         initExceptionCount;
143    bool        optimizing;
144
145    /*
146     * java.lang.System properties set from the command line.
147     */
148    int         numProps;
149    int         maxProps;
150    char**      propList;
151
152    /*
153     * Where the VM goes to find system classes.
154     */
155    ClassPathEntry* bootClassPath;
156    /* used by the DEX optimizer to load classes from an unfinished DEX */
157    DvmDex*     bootClassPathOptExtra;
158    bool        optimizingBootstrapClass;
159
160    /*
161     * Loaded classes, hashed by class name.  Each entry is a ClassObject*,
162     * allocated in GC space.
163     */
164    HashTable*  loadedClasses;
165
166    /*
167     * Value for the next class serial number to be assigned.  This is
168     * incremented as we load classes.  Failed loads and races may result
169     * in some numbers being skipped, and the serial number is not
170     * guaranteed to start at 1, so the current value should not be used
171     * as a count of loaded classes.
172     */
173    volatile int classSerialNumber;
174
175    /*
176     * Classes with a low classSerialNumber are probably in the zygote, and
177     * their InitiatingLoaderList is not used, to promote sharing. The list is
178     * kept here instead.
179     */
180    InitiatingLoaderList* initiatingLoaderList;
181
182    /*
183     * Interned strings.
184     */
185
186    /* A mutex that guards access to the interned string tables. */
187    pthread_mutex_t internLock;
188
189    /* Hash table of strings interned by the user. */
190    HashTable*  internedStrings;
191
192    /* Hash table of strings interned by the class loader. */
193    HashTable*  literalStrings;
194
195    /*
196     * Quick lookups for popular classes used internally.
197     */
198    ClassObject* classJavaLangClass;
199    ClassObject* classJavaLangClassArray;
200    ClassObject* classJavaLangError;
201    ClassObject* classJavaLangObject;
202    ClassObject* classJavaLangObjectArray;
203    ClassObject* classJavaLangRuntimeException;
204    ClassObject* classJavaLangString;
205    ClassObject* classJavaLangThread;
206    ClassObject* classJavaLangVMThread;
207    ClassObject* classJavaLangThreadGroup;
208    ClassObject* classJavaLangThrowable;
209    ClassObject* classJavaLangStackOverflowError;
210    ClassObject* classJavaLangStackTraceElement;
211    ClassObject* classJavaLangStackTraceElementArray;
212    ClassObject* classJavaLangAnnotationAnnotationArray;
213    ClassObject* classJavaLangAnnotationAnnotationArrayArray;
214    ClassObject* classJavaLangReflectAccessibleObject;
215    ClassObject* classJavaLangReflectConstructor;
216    ClassObject* classJavaLangReflectConstructorArray;
217    ClassObject* classJavaLangReflectField;
218    ClassObject* classJavaLangReflectFieldArray;
219    ClassObject* classJavaLangReflectMethod;
220    ClassObject* classJavaLangReflectMethodArray;
221    ClassObject* classJavaLangReflectProxy;
222    ClassObject* classJavaLangExceptionInInitializerError;
223    ClassObject* classJavaLangRefPhantomReference;
224    ClassObject* classJavaLangRefReference;
225    ClassObject* classJavaNioReadWriteDirectByteBuffer;
226    ClassObject* classJavaSecurityAccessController;
227    ClassObject* classOrgApacheHarmonyLangAnnotationAnnotationFactory;
228    ClassObject* classOrgApacheHarmonyLangAnnotationAnnotationMember;
229    ClassObject* classOrgApacheHarmonyLangAnnotationAnnotationMemberArray;
230
231    /* synthetic classes for arrays of primitives */
232    ClassObject* classArrayBoolean;
233    ClassObject* classArrayChar;
234    ClassObject* classArrayFloat;
235    ClassObject* classArrayDouble;
236    ClassObject* classArrayByte;
237    ClassObject* classArrayShort;
238    ClassObject* classArrayInt;
239    ClassObject* classArrayLong;
240
241    /* method offsets - Object */
242    int         voffJavaLangObject_equals;
243    int         voffJavaLangObject_hashCode;
244    int         voffJavaLangObject_toString;
245    int         voffJavaLangObject_finalize;
246
247    /* field offsets - Class */
248    int         offJavaLangClass_pd;
249
250    /* field offsets - String */
251    int         javaLangStringReady;    /* 0=not init, 1=ready, -1=initing */
252    int         offJavaLangString_value;
253    int         offJavaLangString_count;
254    int         offJavaLangString_offset;
255    int         offJavaLangString_hashCode;
256
257    /* field offsets - Thread */
258    int         offJavaLangThread_vmThread;
259    int         offJavaLangThread_group;
260    int         offJavaLangThread_daemon;
261    int         offJavaLangThread_name;
262    int         offJavaLangThread_priority;
263
264    /* method offsets - Thread */
265    int         voffJavaLangThread_run;
266
267    /* field offsets - VMThread */
268    int         offJavaLangVMThread_thread;
269    int         offJavaLangVMThread_vmData;
270
271    /* method offsets - ThreadGroup */
272    int         voffJavaLangThreadGroup_removeThread;
273
274    /* field offsets - Throwable */
275    int         offJavaLangThrowable_stackState;
276    int         offJavaLangThrowable_cause;
277
278    /* field offsets - java.lang.reflect.* */
279    int         offJavaLangReflectAccessibleObject_flag;
280    int         offJavaLangReflectConstructor_slot;
281    int         offJavaLangReflectConstructor_declClass;
282    int         offJavaLangReflectField_slot;
283    int         offJavaLangReflectField_declClass;
284    int         offJavaLangReflectMethod_slot;
285    int         offJavaLangReflectMethod_declClass;
286
287    /* field offsets - java.lang.ref.Reference */
288    int         offJavaLangRefReference_referent;
289    int         offJavaLangRefReference_queue;
290    int         offJavaLangRefReference_queueNext;
291    int         offJavaLangRefReference_pendingNext;
292
293    /* method pointers - java.lang.ref.Reference */
294    Method*     methJavaLangRefReference_enqueueInternal;
295
296    /* field offsets - java.nio.Buffer and java.nio.DirectByteBufferImpl */
297    //int         offJavaNioBuffer_capacity;
298    //int         offJavaNioDirectByteBufferImpl_pointer;
299
300    /* method pointers - java.security.AccessController */
301    volatile int javaSecurityAccessControllerReady;
302    Method*     methJavaSecurityAccessController_doPrivileged[4];
303
304    /* constructor method pointers; no vtable involved, so use Method* */
305    Method*     methJavaLangStackTraceElement_init;
306    Method*     methJavaLangExceptionInInitializerError_init;
307    Method*     methJavaLangRefPhantomReference_init;
308    Method*     methJavaLangReflectConstructor_init;
309    Method*     methJavaLangReflectField_init;
310    Method*     methJavaLangReflectMethod_init;
311    Method*     methOrgApacheHarmonyLangAnnotationAnnotationMember_init;
312
313    /* static method pointers - android.lang.annotation.* */
314    Method*
315        methOrgApacheHarmonyLangAnnotationAnnotationFactory_createAnnotation;
316
317    /* direct method pointers - java.lang.reflect.Proxy */
318    Method*     methJavaLangReflectProxy_constructorPrototype;
319
320    /* field offsets - java.lang.reflect.Proxy */
321    int         offJavaLangReflectProxy_h;
322
323    /* fake native entry point method */
324    Method*     methFakeNativeEntry;
325
326    /* assorted direct buffer helpers */
327    Method*     methJavaNioReadWriteDirectByteBuffer_init;
328    int         offJavaNioBuffer_capacity;
329    int         offJavaNioBuffer_effectiveDirectAddress;
330
331    /*
332     * VM-synthesized primitive classes, for arrays.
333     */
334    ClassObject* volatile primitiveClass[PRIM_MAX];
335
336    /*
337     * Thread list.  This always has at least one element in it (main),
338     * and main is always the first entry.
339     *
340     * The threadListLock is used for several things, including the thread
341     * start condition variable.  Generally speaking, you must hold the
342     * threadListLock when:
343     *  - adding/removing items from the list
344     *  - waiting on or signaling threadStartCond
345     *  - examining the Thread struct for another thread (this is to avoid
346     *    one thread freeing the Thread struct while another thread is
347     *    perusing it)
348     */
349    Thread*     threadList;
350    pthread_mutex_t threadListLock;
351
352    pthread_cond_t threadStartCond;
353
354    /*
355     * The thread code grabs this before suspending all threads.  There
356     * are a few things that can cause a "suspend all":
357     *  (1) the GC is starting;
358     *  (2) the debugger has sent a "suspend all" request;
359     *  (3) a thread has hit a breakpoint or exception that the debugger
360     *      has marked as a "suspend all" event;
361     *  (4) the SignalCatcher caught a signal that requires suspension.
362     *  (5) (if implemented) the JIT needs to perform a heavyweight
363     *      rearrangement of the translation cache or JitTable.
364     *
365     * Because we use "safe point" self-suspension, it is never safe to
366     * do a blocking "lock" call on this mutex -- if it has been acquired,
367     * somebody is probably trying to put you to sleep.  The leading '_' is
368     * intended as a reminder that this lock is special.
369     */
370    pthread_mutex_t _threadSuspendLock;
371
372    /*
373     * Guards Thread->suspendCount for all threads, and provides the lock
374     * for the condition variable that all suspended threads sleep on
375     * (threadSuspendCountCond).
376     *
377     * This has to be separate from threadListLock because of the way
378     * threads put themselves to sleep.
379     */
380    pthread_mutex_t threadSuspendCountLock;
381
382    /*
383     * Suspended threads sleep on this.  They should sleep on the condition
384     * variable until their "suspend count" is zero.
385     *
386     * Paired with "threadSuspendCountLock".
387     */
388    pthread_cond_t  threadSuspendCountCond;
389
390    /*
391     * Sum of all threads' suspendCount fields.  The JIT needs to know if any
392     * thread is suspended.  Guarded by threadSuspendCountLock.
393     */
394    int  sumThreadSuspendCount;
395
396    /*
397     * MUTEX ORDERING: when locking multiple mutexes, always grab them in
398     * this order to avoid deadlock:
399     *
400     *  (1) _threadSuspendLock      (use lockThreadSuspend())
401     *  (2) threadListLock          (use dvmLockThreadList())
402     *  (3) threadSuspendCountLock  (use lockThreadSuspendCount())
403     */
404
405
406    /*
407     * Thread ID bitmap.  We want threads to have small integer IDs so
408     * we can use them in "thin locks".
409     */
410    BitVector*  threadIdMap;
411
412    /*
413     * Manage exit conditions.  The VM exits when all non-daemon threads
414     * have exited.  If the main thread returns early, we need to sleep
415     * on a condition variable.
416     */
417    int         nonDaemonThreadCount;   /* must hold threadListLock to access */
418    //pthread_mutex_t vmExitLock;
419    pthread_cond_t  vmExitCond;
420
421    /*
422     * The set of DEX files loaded by custom class loaders.
423     */
424    HashTable*  userDexFiles;
425
426    /*
427     * JNI global reference table.
428     */
429#ifdef USE_INDIRECT_REF
430    IndirectRefTable jniGlobalRefTable;
431#else
432    ReferenceTable  jniGlobalRefTable;
433#endif
434    pthread_mutex_t jniGlobalRefLock;
435    int         jniGlobalRefHiMark;
436    int         jniGlobalRefLoMark;
437
438    /*
439     * JNI pinned object table (used for primitive arrays).
440     */
441    ReferenceTable  jniPinRefTable;
442    pthread_mutex_t jniPinRefLock;
443
444    /*
445     * Native shared library table.
446     */
447    HashTable*  nativeLibs;
448
449    /*
450     * GC heap lock.  Functions like gcMalloc() acquire this before making
451     * any changes to the heap.  It is held throughout garbage collection.
452     */
453    pthread_mutex_t gcHeapLock;
454
455    /*
456     * Condition variable to queue threads waiting to retry an
457     * allocation.  Signaled after a concurrent GC is completed.
458     */
459    pthread_cond_t gcHeapCond;
460
461    /* Opaque pointer representing the heap. */
462    GcHeap*     gcHeap;
463
464    /* The card table base, modified as needed for marking cards. */
465    u1*         biasedCardTableBase;
466
467    /*
468     * Pre-allocated throwables.
469     */
470    Object*     outOfMemoryObj;
471    Object*     internalErrorObj;
472    Object*     noClassDefFoundErrorObj;
473
474    /* Monitor list, so we can free them */
475    /*volatile*/ Monitor* monitorList;
476
477    /* Monitor for Thread.sleep() implementation */
478    Monitor*    threadSleepMon;
479
480    /* set when we create a second heap inside the zygote */
481    bool        newZygoteHeapAllocated;
482
483    /*
484     * TLS keys.
485     */
486    pthread_key_t pthreadKeySelf;       /* Thread*, for dvmThreadSelf */
487
488    /*
489     * JNI allows you to have multiple VMs, but we limit ourselves to 1,
490     * so "vmList" is really just a pointer to the one and only VM.
491     */
492    JavaVM*     vmList;
493
494    /*
495     * Cache results of "A instanceof B".
496     */
497    AtomicCache* instanceofCache;
498
499    /* instruction width table, used for optimization and verification */
500    InstructionWidth*   instrWidth;
501    /* instruction flags table, used for verification */
502    InstructionFlags*   instrFlags;
503    /* instruction format table, used for verification */
504    InstructionFormat*  instrFormat;
505
506    /* inline substitution table, used during optimization */
507    InlineSub*          inlineSubs;
508
509    /*
510     * Bootstrap class loader linear allocator.
511     */
512    LinearAllocHdr* pBootLoaderAlloc;
513
514
515    /*
516     * Heap worker thread.
517     */
518    bool            heapWorkerInitialized;
519    bool            heapWorkerReady;
520    bool            haltHeapWorker;
521    pthread_t       heapWorkerHandle;
522    pthread_mutex_t heapWorkerLock;
523    pthread_cond_t  heapWorkerCond;
524    pthread_cond_t  heapWorkerIdleCond;
525    pthread_mutex_t heapWorkerListLock;
526
527    /*
528     * Compute some stats on loaded classes.
529     */
530    int         numLoadedClasses;
531    int         numDeclaredMethods;
532    int         numDeclaredInstFields;
533    int         numDeclaredStaticFields;
534
535    /* when using a native debugger, set this to suppress watchdog timers */
536    bool        nativeDebuggerActive;
537
538    /*
539     * JDWP debugger support.
540     *
541     * Note "debuggerActive" is accessed from mterp, so its storage size and
542     * meaning must not be changed without updating the assembly sources.
543     */
544    bool        debuggerConnected;      /* debugger or DDMS is connected */
545    u1          debuggerActive;         /* debugger is making requests */
546    JdwpState*  jdwpState;
547
548    /*
549     * Registry of objects known to the debugger.
550     */
551    HashTable*  dbgRegistry;
552
553    /*
554     * Debugger breakpoint table.
555     */
556    BreakpointSet*  breakpointSet;
557
558    /*
559     * Single-step control struct.  We currently only allow one thread to
560     * be single-stepping at a time, which is all that really makes sense,
561     * but it's possible we may need to expand this to be per-thread.
562     */
563    StepControl stepControl;
564
565    /*
566     * DDM features embedded in the VM.
567     */
568    bool        ddmThreadNotification;
569
570    /*
571     * Zygote (partially-started process) support
572     */
573    bool        zygote;
574
575    /*
576     * Used for tracking allocations that we report to DDMS.  When the feature
577     * is enabled (through a DDMS request) the "allocRecords" pointer becomes
578     * non-NULL.
579     */
580    pthread_mutex_t allocTrackerLock;
581    AllocRecord*    allocRecords;
582    int             allocRecordHead;        /* most-recently-added entry */
583    int             allocRecordCount;       /* #of valid entries */
584
585#ifdef WITH_ALLOC_LIMITS
586    /* set on first use of an alloc limit, never cleared */
587    bool        checkAllocLimits;
588    /* allocation limit, for setGlobalAllocationLimit() regression testing */
589    int         allocationLimit;
590#endif
591
592#ifdef WITH_DEADLOCK_PREDICTION
593    /* global lock on history tree accesses */
594    pthread_mutex_t deadlockHistoryLock;
595
596    enum { kDPOff=0, kDPWarn, kDPErr, kDPAbort } deadlockPredictMode;
597#endif
598
599    /*
600     * When a profiler is enabled, this is incremented.  Distinct profilers
601     * include "dmtrace" method tracing, emulator method tracing, and
602     * possibly instruction counting.
603     *
604     * The purpose of this is to have a single value that the interpreter
605     * can check to see if any profiling activity is enabled.
606     */
607    volatile int activeProfilers;
608
609    /*
610     * State for method-trace profiling.
611     */
612    MethodTraceState methodTrace;
613
614    /*
615     * State for emulator tracing.
616     */
617    void*       emulatorTracePage;
618    int         emulatorTraceEnableCount;
619
620    /*
621     * Global state for memory allocation profiling.
622     */
623    AllocProfState allocProf;
624
625    /*
626     * Pointers to the original methods for things that have been inlined.
627     * This makes it easy for us to output method entry/exit records for
628     * the method calls we're not actually making.  (Used by method
629     * profiling.)
630     */
631    Method**    inlinedMethods;
632
633    /*
634     * Dalvik instruction counts (256 entries).
635     */
636    int*        executedInstrCounts;
637    bool        instructionCountEnableCount;
638
639    /*
640     * Signal catcher thread (for SIGQUIT).
641     */
642    pthread_t   signalCatcherHandle;
643    bool        haltSignalCatcher;
644
645    /*
646     * Stdout/stderr conversion thread.
647     */
648    bool            haltStdioConverter;
649    bool            stdioConverterReady;
650    pthread_t       stdioConverterHandle;
651    pthread_mutex_t stdioConverterLock;
652    pthread_cond_t  stdioConverterCond;
653
654    /*
655     * pid of the system_server process. We track it so that when system server
656     * crashes the Zygote process will be killed and restarted.
657     */
658    pid_t systemServerPid;
659
660    int kernelGroupScheduling;
661
662//#define COUNT_PRECISE_METHODS
663#ifdef COUNT_PRECISE_METHODS
664    PointerSet* preciseMethods;
665#endif
666
667    /* some RegisterMap statistics, useful during development */
668    void*       registerMapStats;
669};
670
671extern struct DvmGlobals gDvm;
672
673#if defined(WITH_JIT)
674
675/*
676 * Exiting the compiled code w/o chaining will incur overhead to look up the
677 * target in the code cache which is extra work only when JIT is enabled. So
678 * we want to monitor it closely to make sure we don't have performance bugs.
679 */
680typedef enum NoChainExits {
681    kInlineCacheMiss = 0,
682    kCallsiteInterpreted,
683    kSwitchOverflow,
684    kHeavyweightMonitor,
685    kNoChainExitLast,
686} NoChainExits;
687
688/*
689 * JIT-specific global state
690 */
691struct DvmJitGlobals {
692    /*
693     * Guards writes to Dalvik PC (dPC), translated code address (codeAddr) and
694     * chain fields within the JIT hash table.  Note carefully the access
695     * mechanism.
696     * Only writes are guarded, and the guarded fields must be updated in a
697     * specific order using atomic operations.  Further, once a field is
698     * written it cannot be changed without halting all threads.
699     *
700     * The write order is:
701     *    1) codeAddr
702     *    2) dPC
703     *    3) chain [if necessary]
704     *
705     * This mutex also guards both read and write of curJitTableEntries.
706     */
707    pthread_mutex_t tableLock;
708
709    /* The JIT hash table.  Note that for access speed, copies of this pointer
710     * are stored in each thread. */
711    struct JitEntry *pJitEntryTable;
712
713    /* Array of profile threshold counters */
714    unsigned char *pProfTable;
715
716    /* Copy of pProfTable used for temporarily disabling the Jit */
717    unsigned char *pProfTableCopy;
718
719    /* Size of JIT hash table in entries.  Must be a power of 2 */
720    unsigned int jitTableSize;
721
722    /* Mask used in hash function for JitTable.  Should be jitTableSize-1 */
723    unsigned int jitTableMask;
724
725    /* How many entries in the JitEntryTable are in use */
726    unsigned int jitTableEntriesUsed;
727
728    /* Bytes allocated for the code cache */
729    unsigned int codeCacheSize;
730
731    /* Trigger for trace selection */
732    unsigned short threshold;
733
734    /* JIT Compiler Control */
735    bool               haltCompilerThread;
736    bool               blockingMode;
737    pthread_t          compilerHandle;
738    pthread_mutex_t    compilerLock;
739    pthread_mutex_t    compilerICPatchLock;
740    pthread_cond_t     compilerQueueActivity;
741    pthread_cond_t     compilerQueueEmpty;
742    volatile int       compilerQueueLength;
743    int                compilerHighWater;
744    int                compilerWorkEnqueueIndex;
745    int                compilerWorkDequeueIndex;
746    int                compilerICPatchIndex;
747
748    /* JIT internal stats */
749    int                compilerMaxQueued;
750    int                translationChains;
751
752    /* Compiled code cache */
753    void* codeCache;
754
755    /* Bytes used by the code templates */
756    unsigned int templateSize;
757
758    /* Bytes already used in the code cache */
759    unsigned int codeCacheByteUsed;
760
761    /* Number of installed compilations in the cache */
762    unsigned int numCompilations;
763
764    /* Flag to indicate that the code cache is full */
765    bool codeCacheFull;
766
767    /* Page size  - 1 */
768    unsigned int pageSizeMask;
769
770    /* Lock to change the protection type of the code cache */
771    pthread_mutex_t    codeCacheProtectionLock;
772
773    /* Number of times that the code cache has been reset */
774    int numCodeCacheReset;
775
776    /* Number of times that the code cache reset request has been delayed */
777    int numCodeCacheResetDelayed;
778
779    /* true/false: compile/reject opcodes specified in the -Xjitop list */
780    bool includeSelectedOp;
781
782    /* true/false: compile/reject methods specified in the -Xjitmethod list */
783    bool includeSelectedMethod;
784
785    /* Disable JIT for selected opcodes - one bit for each opcode */
786    char opList[32];
787
788    /* Disable JIT for selected methods */
789    HashTable *methodTable;
790
791    /* Flag to dump all compiled code */
792    bool printMe;
793
794    /* Flag to count trace execution */
795    bool profile;
796
797    /* Vector to disable selected optimizations */
798    int disableOpt;
799
800    /* Table to track the overall and trace statistics of hot methods */
801    HashTable*  methodStatsTable;
802
803    /* Filter method compilation blacklist with call-graph information */
804    bool checkCallGraph;
805
806    /* New translation chain has been set up */
807    volatile bool hasNewChain;
808
809#if defined(WITH_SELF_VERIFICATION)
810    /* Spin when error is detected, volatile so GDB can reset it */
811    volatile bool selfVerificationSpin;
812#endif
813
814    /* Framework or stand-alone? */
815    bool runningInAndroidFramework;
816
817    /* Framework callback happened? */
818    bool alreadyEnabledViaFramework;
819
820    /* Framework requests to disable the JIT for good */
821    bool disableJit;
822
823#if defined(SIGNATURE_BREAKPOINT)
824    /* Signature breakpoint */
825    u4 signatureBreakpointSize;         // # of words
826    u4 *signatureBreakpoint;            // Signature content
827#endif
828
829#if defined(WITH_JIT_TUNING)
830    /* Performance tuning counters */
831    int                addrLookupsFound;
832    int                addrLookupsNotFound;
833    int                noChainExit[kNoChainExitLast];
834    int                normalExit;
835    int                puntExit;
836    int                invokeMonomorphic;
837    int                invokePolymorphic;
838    int                invokeNative;
839    int                invokeMonoGetterInlined;
840    int                invokeMonoSetterInlined;
841    int                invokePolyGetterInlined;
842    int                invokePolySetterInlined;
843    int                returnOp;
844    int                icPatchInit;
845    int                icPatchLockFree;
846    int                icPatchQueued;
847    int                icPatchRejected;
848    int                icPatchDropped;
849    u8                 jitTime;
850    int                codeCachePatches;
851#endif
852
853    /* Place arrays at the end to ease the display in gdb sessions */
854
855    /* Work order queue for compilations */
856    CompilerWorkOrder compilerWorkQueue[COMPILER_WORK_QUEUE_SIZE];
857
858    /* Work order queue for predicted chain patching */
859    ICPatchWorkOrder compilerICPatchQueue[COMPILER_IC_PATCH_QUEUE_SIZE];
860};
861
862extern struct DvmJitGlobals gDvmJit;
863
864#if defined(WITH_JIT_TUNING)
865extern int gDvmICHitCount;
866#endif
867
868#endif
869
870#endif /*_DALVIK_GLOBALS*/
871