/[jscoverage]/trunk/js/jscntxt.h
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revision 506 by siliconforks, Sat Sep 26 23:15:22 2009 UTC revision 507 by siliconforks, Sun Jan 10 07:23:34 2010 UTC
# Line 1  Line 1 
1  /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-  /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2   * vim: set ts=8 sw=4 et tw=78:   * vim: set ts=8 sw=4 et tw=78:
3   *   *
4   * ***** BEGIN LICENSE BLOCK *****   * ***** BEGIN LICENSE BLOCK *****
# Line 56  Line 56 
56  #include "jspubtd.h"  #include "jspubtd.h"
57  #include "jsregexp.h"  #include "jsregexp.h"
58  #include "jsutil.h"  #include "jsutil.h"
59    #include "jsarray.h"
60  JS_BEGIN_EXTERN_C  #include "jstask.h"
61    
62  /*  /*
63   * js_GetSrcNote cache to avoid O(n^2) growth in finding a source note for a   * js_GetSrcNote cache to avoid O(n^2) growth in finding a source note for a
# Line 93  Line 93 
93    
94  #ifdef __cplusplus  #ifdef __cplusplus
95  namespace nanojit {  namespace nanojit {
96        class Assembler;
97        class CodeAlloc;
98      class Fragment;      class Fragment;
     class Fragmento;  
99      class LirBuffer;      class LirBuffer;
100    #ifdef DEBUG
101        class LabelMap;
102    #endif
103        extern "C++" {
104            template<typename K> class DefaultHash;
105            template<typename K, typename V, typename H> class HashMap;
106            template<typename T> class Seq;
107        }
108  }  }
109    #if defined(JS_JIT_SPEW) || defined(DEBUG)
110    struct FragPI;
111    typedef nanojit::HashMap<uint32, FragPI, nanojit::DefaultHash<uint32> > FragStatsMap;
112    #endif
113  class TraceRecorder;  class TraceRecorder;
114    class VMAllocator;
115  extern "C++" { template<typename T> class Queue; }  extern "C++" { template<typename T> class Queue; }
116  typedef Queue<uint16> SlotList;  typedef Queue<uint16> SlotList;
117    
# Line 109  Line 123 
123  #define FRAGMENT_TABLE_SIZE 512  #define FRAGMENT_TABLE_SIZE 512
124  struct VMFragment;  struct VMFragment;
125    
126    #ifdef __cplusplus
127    struct REHashKey;
128    struct REHashFn;
129    typedef nanojit::HashMap<REHashKey, nanojit::Fragment*, REHashFn> REHashMap;
130    #endif
131    
132  #define MONITOR_N_GLOBAL_STATES 4  #define MONITOR_N_GLOBAL_STATES 4
133  struct GlobalState {  struct GlobalState {
134      JSObject*               globalObj;      JSObject*               globalObj;
# Line 128  Line 148 
148       * last-ditch GC and suppress calls to JS_ReportOutOfMemory.       * last-ditch GC and suppress calls to JS_ReportOutOfMemory.
149       *       *
150       * !tracecx && !recorder: not on trace       * !tracecx && !recorder: not on trace
151       * !tracecx && !recorder && prohibitFlush: deep-bailed       * !tracecx && recorder: recording
      * !tracecx && recorder && !recorder->deepAborted: recording  
      * !tracecx && recorder && recorder->deepAborted: deep aborted  
152       * tracecx && !recorder: executing a trace       * tracecx && !recorder: executing a trace
153       * tracecx && recorder: executing inner loop, recording outer loop       * tracecx && recorder: executing inner loop, recording outer loop
154       */       */
155      JSContext               *tracecx;      JSContext               *tracecx;
156    
157        CLS(VMAllocator)        dataAlloc;   /* A chunk allocator for LIR.    */
158        CLS(VMAllocator)        tempAlloc;   /* A temporary chunk allocator.  */
159        CLS(nanojit::CodeAlloc) codeAlloc;   /* An allocator for native code. */
160        CLS(nanojit::Assembler) assembler;
161      CLS(nanojit::LirBuffer) lirbuf;      CLS(nanojit::LirBuffer) lirbuf;
162      CLS(nanojit::Fragmento) fragmento;      CLS(nanojit::LirBuffer) reLirBuf;
163    #ifdef DEBUG
164        CLS(nanojit::LabelMap)  labels;
165    #endif
166    
167      CLS(TraceRecorder)      recorder;      CLS(TraceRecorder)      recorder;
168      jsval                   *reservedDoublePool;      jsval                   *reservedDoublePool;
169      jsval                   *reservedDoublePoolPtr;      jsval                   *reservedDoublePoolPtr;
# Line 156  Line 182 
182       * If nonzero, do not flush the JIT cache after a deep bail. That would       * If nonzero, do not flush the JIT cache after a deep bail. That would
183       * free JITted code pages that we will later return to. Instead, set the       * free JITted code pages that we will later return to. Instead, set the
184       * needFlush flag so that it can be flushed later.       * needFlush flag so that it can be flushed later.
      *  
      * NB: needFlush and useReservedObjects are packed together.  
185       */       */
186      uintN                   prohibitFlush;      JSBool                  needFlush;
     JSPackedBool            needFlush;  
187    
188      /*      /*
189       * reservedObjects is a linked list (via fslots[0]) of preallocated JSObjects.       * reservedObjects is a linked list (via fslots[0]) of preallocated JSObjects.
190       * The JIT uses this to ensure that leaving a trace tree can't fail.       * The JIT uses this to ensure that leaving a trace tree can't fail.
191       */       */
192      JSPackedBool            useReservedObjects;      JSBool                  useReservedObjects;
193      JSObject                *reservedObjects;      JSObject                *reservedObjects;
194    
195      /* Fragmento for the regular expression compiler. This is logically      /*
196       * a distinct compiler but needs to be managed in exactly the same       * Fragment map for the regular expression compiler.
197       * way as the real tracing Fragmento. */       */
198      CLS(nanojit::LirBuffer) reLirBuf;      CLS(REHashMap)          reFragments;
199      CLS(nanojit::Fragmento) reFragmento;  
200        /*
201         * A temporary allocator for RE recording.
202         */
203        CLS(VMAllocator)        reTempAlloc;
204    
205    #ifdef __cplusplus /* Allow inclusion from LiveConnect C files. */
206    
207    #ifdef DEBUG
208        /* Fields needed for fragment/guard profiling. */
209        CLS(nanojit::Seq<nanojit::Fragment*>) branches;
210        uint32                  lastFragID;
211        /*
212         * profAlloc has a lifetime which spans exactly from js_InitJIT to
213         * js_FinishJIT.
214         */
215        CLS(VMAllocator)        profAlloc;
216        CLS(FragStatsMap)       profTab;
217    #endif
218    
219        /* Flush the JIT cache. */
220        void flush();
221    
222      /* Keep a list of recorders we need to abort on cache flush. */      /* Mark all objects baked into native code in the code cache. */
223      CLS(TraceRecorder)      abortStack;      void mark(JSTracer *trc);
224    
225    #endif
226  };  };
227    
228  typedef struct InterpStruct InterpStruct;  typedef struct InterpStruct InterpStruct;
# Line 238  Line 284 
284      /* Property cache for faster call/get/set invocation. */      /* Property cache for faster call/get/set invocation. */
285      JSPropertyCache     propertyCache;      JSPropertyCache     propertyCache;
286    
287        /* Random number generator state, used by jsmath.cpp. */
288        int64               rngSeed;
289    
290  #ifdef JS_TRACER  #ifdef JS_TRACER
291      /* Trace-tree JIT recorder/interpreter state. */      /* Trace-tree JIT recorder/interpreter state. */
292      JSTraceMonitor      traceMonitor;      JSTraceMonitor      traceMonitor;
# Line 249  Line 298 
298  #ifdef JS_EVAL_CACHE_METERING  #ifdef JS_EVAL_CACHE_METERING
299      JSEvalCacheMeter    evalCacheMeter;      JSEvalCacheMeter    evalCacheMeter;
300  #endif  #endif
301    
302        /*
303         * Thread-local version of JSRuntime.gcMallocBytes to avoid taking
304         * locks on each JS_malloc.
305         */
306        size_t              gcMallocBytes;
307    
308    #ifdef __cplusplus /* Allow inclusion from LiveConnect C files. */
309    
310        /*
311         * Cache of reusable JSNativeEnumerators mapped by shape identifiers (as
312         * stored in scope->shape). This cache is nulled by the GC and protected
313         * by gcLock.
314         */
315    #define NATIVE_ENUM_CACHE_LOG2  8
316    #define NATIVE_ENUM_CACHE_MASK  JS_BITMASK(NATIVE_ENUM_CACHE_LOG2)
317    #define NATIVE_ENUM_CACHE_SIZE  JS_BIT(NATIVE_ENUM_CACHE_LOG2)
318    
319    #define NATIVE_ENUM_CACHE_HASH(shape)                                         \
320        ((((shape) >> NATIVE_ENUM_CACHE_LOG2) ^ (shape)) & NATIVE_ENUM_CACHE_MASK)
321    
322        jsuword             nativeEnumCache[NATIVE_ENUM_CACHE_SIZE];
323    
324    #ifdef JS_THREADSAFE
325        /*
326         * Deallocator task for this thread.
327         */
328        JSFreePointerListTask *deallocatorTask;
329    #endif
330    
331        void mark(JSTracer *trc) {
332    #ifdef JS_TRACER
333            traceMonitor.mark(trc);
334    #endif
335        }
336        
337    #endif /* __cplusplus */
338  };  };
339    
340  #ifdef JS_THREADSAFE  #ifdef JS_THREADSAFE
# Line 264  Line 350 
350      /* Opaque thread-id, from NSPR's PR_GetCurrentThread(). */      /* Opaque thread-id, from NSPR's PR_GetCurrentThread(). */
351      jsword              id;      jsword              id;
352    
     /*  
      * Thread-local version of JSRuntime.gcMallocBytes to avoid taking  
      * locks on each JS_malloc.  
      */  
     uint32              gcMallocBytes;  
   
353      /* Indicates that the thread is waiting in ClaimTitle from jslock.cpp. */      /* Indicates that the thread is waiting in ClaimTitle from jslock.cpp. */
354      JSTitle             *titleToShare;      JSTitle             *titleToShare;
355    
356        JSGCThing           *gcFreeLists[GC_NUM_FREELISTS];
357    
358      /* Factored out of JSThread for !JS_THREADSAFE embedding in JSRuntime. */      /* Factored out of JSThread for !JS_THREADSAFE embedding in JSRuntime. */
359      JSThreadData        data;      JSThreadData        data;
360  };  };
# Line 284  Line 366 
366      JSThread            *thread;      JSThread            *thread;
367  };  };
368    
369    extern JSThread *
370    js_CurrentThread(JSRuntime *rt);
371    
372  /*  /*
373   * The function takes the GC lock and does not release in successful return.   * The function takes the GC lock and does not release in successful return.
374   * On error (out of memory) the function releases the lock but delegates   * On error (out of memory) the function releases the lock but delegates
# Line 317  Line 402 
402  typedef enum JSBuiltinFunctionId {  typedef enum JSBuiltinFunctionId {
403      JSBUILTIN_ObjectToIterator,      JSBUILTIN_ObjectToIterator,
404      JSBUILTIN_CallIteratorNext,      JSBUILTIN_CallIteratorNext,
     JSBUILTIN_GetProperty,  
     JSBUILTIN_GetElement,  
     JSBUILTIN_SetProperty,  
     JSBUILTIN_SetElement,  
405      JSBUILTIN_LIMIT      JSBUILTIN_LIMIT
406  } JSBuiltinFunctionId;  } JSBuiltinFunctionId;
407    
# Line 364  Line 445 
445      JSGCChunkInfo       *gcChunkList;      JSGCChunkInfo       *gcChunkList;
446      JSGCArenaList       gcArenaList[GC_NUM_FREELISTS];      JSGCArenaList       gcArenaList[GC_NUM_FREELISTS];
447      JSGCDoubleArenaList gcDoubleArenaList;      JSGCDoubleArenaList gcDoubleArenaList;
     JSGCFreeListSet     *gcFreeListsPool;  
448      JSDHashTable        gcRootsHash;      JSDHashTable        gcRootsHash;
449      JSDHashTable        *gcLocksHash;      JSDHashTable        *gcLocksHash;
450      jsrefcount          gcKeepAtoms;      jsrefcount          gcKeepAtoms;
451      uint32              gcBytes;      size_t              gcBytes;
452      uint32              gcLastBytes;      size_t              gcLastBytes;
453      uint32              gcMaxBytes;      size_t              gcMaxBytes;
454      uint32              gcMaxMallocBytes;      size_t              gcMaxMallocBytes;
455      uint32              gcEmptyArenaPoolLifespan;      uint32              gcEmptyArenaPoolLifespan;
456      uint32              gcLevel;      uint32              gcLevel;
457      uint32              gcNumber;      uint32              gcNumber;
458      JSTracer            *gcMarkingTracer;      JSTracer            *gcMarkingTracer;
459      uint32              gcTriggerFactor;      uint32              gcTriggerFactor;
460        size_t              gcTriggerBytes;
461      volatile JSBool     gcIsNeeded;      volatile JSBool     gcIsNeeded;
462        volatile JSBool     gcFlushCodeCaches;
463    
464      /*      /*
465       * NB: do not pack another flag here by claiming gcPadding unless the new       * NB: do not pack another flag here by claiming gcPadding unless the new
# Line 387  Line 469 
469       */       */
470      JSPackedBool        gcPoke;      JSPackedBool        gcPoke;
471      JSPackedBool        gcRunning;      JSPackedBool        gcRunning;
472      uint16              gcPadding;      JSPackedBool        gcRegenShapes;
473    
474        /*
475         * During gc, if rt->gcRegenShapes &&
476         *   (scope->flags & JSScope::SHAPE_REGEN) == rt->gcRegenShapesScopeFlag,
477         * then the scope's shape has already been regenerated during this GC.
478         * To avoid having to sweep JSScopes, the bit's meaning toggles with each
479         * shape-regenerating GC.
480         *
481         * FIXME Once scopes are GC'd (bug 505004), this will be obsolete.
482         */
483        uint8               gcRegenShapesScopeFlag;
484    
485  #ifdef JS_GC_ZEAL  #ifdef JS_GC_ZEAL
486      jsrefcount          gcZeal;      jsrefcount          gcZeal;
487  #endif  #endif
488    
489      JSGCCallback        gcCallback;      JSGCCallback        gcCallback;
490      uint32              gcMallocBytes;      size_t              gcMallocBytes;
491      JSGCArenaInfo       *gcUntracedArenaStackTop;      JSGCArenaInfo       *gcUntracedArenaStackTop;
492  #ifdef DEBUG  #ifdef DEBUG
493      size_t              gcTraceLaterCount;      size_t              gcTraceLaterCount;
# Line 420  Line 514 
514       */       */
515      JSSetSlotRequest    *setSlotRequests;      JSSetSlotRequest    *setSlotRequests;
516    
     /* Random number generator state, used by jsmath.c. */  
     JSBool              rngInitialized;  
     int64               rngMultiplier;  
     int64               rngAddend;  
     int64               rngMask;  
     int64               rngSeed;  
     jsdouble            rngDscale;  
   
517      /* Well-known numbers held for use by this runtime's contexts. */      /* Well-known numbers held for use by this runtime's contexts. */
518      jsdouble            *jsNaN;      jsdouble            *jsNaN;
519      jsdouble            *jsNegativeInfinity;      jsdouble            *jsNegativeInfinity;
# Line 441  Line 527 
527      uint32              deflatedStringCacheBytes;      uint32              deflatedStringCacheBytes;
528  #endif  #endif
529    
     /*  
      * Empty and unit-length strings held for use by this runtime's contexts.  
      * The unitStrings array and its elements are created on demand.  
      */  
530      JSString            *emptyString;      JSString            *emptyString;
     JSString            **unitStrings;  
531    
532      /*      /*
533       * Builtin functions, lazily created and held for use by the trace recorder.       * Builtin functions, lazily created and held for use by the trace recorder.
# Line 462  Line 543 
543      /* Per runtime debug hooks -- see jsprvtd.h and jsdbgapi.h. */      /* Per runtime debug hooks -- see jsprvtd.h and jsdbgapi.h. */
544      JSDebugHooks        globalDebugHooks;      JSDebugHooks        globalDebugHooks;
545    
546    #ifdef JS_TRACER
547        /* True if any debug hooks not supported by the JIT are enabled. */
548        bool debuggerInhibitsJIT() const {
549            return (globalDebugHooks.interruptHandler ||
550                    globalDebugHooks.callHook ||
551                    globalDebugHooks.objectHook);
552        }
553    #endif
554    
555      /* More debugging state, see jsdbgapi.c. */      /* More debugging state, see jsdbgapi.c. */
556      JSCList             trapList;      JSCList             trapList;
557      JSCList             watchPointList;      JSCList             watchPointList;
# Line 528  Line 618 
618    
619      /*      /*
620       * Shared scope property tree, and arena-pool for allocating its nodes.       * Shared scope property tree, and arena-pool for allocating its nodes.
621       * The propertyRemovals counter is incremented for every js_ClearScope,       * The propertyRemovals counter is incremented for every JSScope::clear,
622       * and for each js_RemoveScopeProperty that frees a slot in an object.       * and for each JSScope::remove method call that frees a slot in an object.
623       * See js_NativeGet and js_NativeSet in jsobj.c.       * See js_NativeGet and js_NativeSet in jsobj.c.
624       */       */
625      JSDHashTable        propertyTreeHash;      JSDHashTable        propertyTreeHash;
# Line 559  Line 649 
649      JSObject            *anynameObject;      JSObject            *anynameObject;
650      JSObject            *functionNamespaceObject;      JSObject            *functionNamespaceObject;
651    
     /*  
      * A helper list for the GC, so it can mark native iterator states. See  
      * js_TraceNativeEnumerators for details.  
      */  
     JSNativeEnumerator  *nativeEnumerators;  
   
652  #ifndef JS_THREADSAFE  #ifndef JS_THREADSAFE
653      JSThreadData        threadData;      JSThreadData        threadData;
654    
# Line 590  Line 674 
674      JSAtomState         atomState;      JSAtomState         atomState;
675    
676      /*      /*
      * Cache of reusable JSNativeEnumerators mapped by shape identifiers (as  
      * stored in scope->shape). This cache is nulled by the GC and protected  
      * by gcLock.  
      */  
 #define NATIVE_ENUM_CACHE_LOG2  8  
 #define NATIVE_ENUM_CACHE_MASK  JS_BITMASK(NATIVE_ENUM_CACHE_LOG2)  
 #define NATIVE_ENUM_CACHE_SIZE  JS_BIT(NATIVE_ENUM_CACHE_LOG2)  
   
 #define NATIVE_ENUM_CACHE_HASH(shape)                                         \  
     ((((shape) >> NATIVE_ENUM_CACHE_LOG2) ^ (shape)) & NATIVE_ENUM_CACHE_MASK)  
   
     jsuword             nativeEnumCache[NATIVE_ENUM_CACHE_SIZE];  
   
     /*  
677       * Various metering fields are defined at the end of JSRuntime. In this       * Various metering fields are defined at the end of JSRuntime. In this
678       * way there is no need to recompile all the code that refers to other       * way there is no need to recompile all the code that refers to other
679       * fields of JSRuntime after enabling the corresponding metering macro.       * fields of JSRuntime after enabling the corresponding metering macro.
# Line 681  Line 751 
751      JSFunctionMeter     functionMeter;      JSFunctionMeter     functionMeter;
752      char                lastScriptFilename[1024];      char                lastScriptFilename[1024];
753  #endif  #endif
754    
755    #ifdef __cplusplus /* Allow inclusion from LiveConnect C files. */
756    
757        void setGCTriggerFactor(uint32 factor);
758        void setGCLastBytes(size_t lastBytes);
759    
760        inline void* malloc(size_t bytes) {
761            return ::js_malloc(bytes);
762        }
763    
764        inline void* calloc(size_t bytes) {
765            return ::js_calloc(bytes);
766        }
767    
768        inline void* realloc(void* p, size_t bytes) {
769            return ::js_realloc(p, bytes);
770        }
771    
772        inline void free(void* p) {
773            ::js_free(p);
774        }
775    
776    #ifdef JS_THREADSAFE
777        JSBackgroundThread    *deallocatorThread;
778    #endif
779    
780    #endif /* __cplusplus */
781  };  };
782    
783  /* Common macros to access thread-local caches in JSThread or JSRuntime. */  /* Common macros to access thread-local caches in JSThread or JSRuntime. */
# Line 783  Line 880 
880   * the following constants:   * the following constants:
881   */   */
882  #define JSTVU_SINGLE        (-1)    /* u.value or u.<gcthing> is single jsval  #define JSTVU_SINGLE        (-1)    /* u.value or u.<gcthing> is single jsval
883                                         or GC-thing */                                         or non-JSString GC-thing pointer */
884  #define JSTVU_TRACE         (-2)    /* u.trace is a hook to trace a custom  #define JSTVU_TRACE         (-2)    /* u.trace is a hook to trace a custom
885                                       * structure */                                       * structure */
886  #define JSTVU_SPROP         (-3)    /* u.sprop roots property tree node */  #define JSTVU_SPROP         (-3)    /* u.sprop roots property tree node */
887  #define JSTVU_WEAK_ROOTS    (-4)    /* u.weakRoots points to saved weak roots */  #define JSTVU_WEAK_ROOTS    (-4)    /* u.weakRoots points to saved weak roots */
888  #define JSTVU_COMPILER      (-5)    /* u.compiler roots JSCompiler* */  #define JSTVU_COMPILER      (-5)    /* u.compiler roots JSCompiler* */
889  #define JSTVU_SCRIPT        (-6)    /* u.script roots JSScript* */  #define JSTVU_SCRIPT        (-6)    /* u.script roots JSScript* */
890    #define JSTVU_ENUMERATOR    (-7)    /* a pointer to JSTempValueRooter points
891                                           to an instance of JSAutoEnumStateRooter
892                                           with u.object storing the enumeration
893                                           object */
894    
895  /*  /*
896   * Here single JSTVU_SINGLE covers both jsval and pointers to any GC-thing via   * Here single JSTVU_SINGLE covers both jsval and pointers to almost (see note
897   * reinterpreting the thing as JSVAL_OBJECT. It works because the GC-thing is   * below) any GC-thing via reinterpreting the thing as JSVAL_OBJECT. This works
898   * aligned on a 0 mod 8 boundary, and object has the 0 jsval tag. So any   * because the GC-thing is aligned on a 0 mod 8 boundary, and object has the 0
899   * GC-thing may be tagged as if it were an object and untagged, if it's then   * jsval tag. So any GC-heap-allocated thing pointer may be tagged as if it
900   * used only as an opaque pointer until discriminated by other means than tag   * were an object and untagged, if it's then used only as an opaque pointer
901   * bits. This is how, for example, js_GetGCThingTraceKind uses its |thing|   * until discriminated by other means than tag bits. This is how, for example,
902   * parameter -- it consults GC-thing flags stored separately from the thing to   * js_GetGCThingTraceKind uses its |thing| parameter -- it consults GC-thing
903   * decide the kind of thing.   * flags stored separately from the thing to decide the kind of thing.
904     *
905     * Note well that JSStrings may be statically allocated (see the intStringTable
906     * and unitStringTable static arrays), so this hack does not work for arbitrary
907     * GC-thing pointers.
908   */   */
909  #define JS_PUSH_TEMP_ROOT_COMMON(cx,x,tvr,cnt,kind)                           \  #define JS_PUSH_TEMP_ROOT_COMMON(cx,x,tvr,cnt,kind)                           \
910      JS_BEGIN_MACRO                                                            \      JS_BEGIN_MACRO                                                            \
# Line 829  Line 934 
934      JS_PUSH_TEMP_ROOT_COMMON(cx, obj, tvr, JSTVU_SINGLE, object)      JS_PUSH_TEMP_ROOT_COMMON(cx, obj, tvr, JSTVU_SINGLE, object)
935    
936  #define JS_PUSH_TEMP_ROOT_STRING(cx,str,tvr)                                  \  #define JS_PUSH_TEMP_ROOT_STRING(cx,str,tvr)                                  \
937      JS_PUSH_TEMP_ROOT_COMMON(cx, str, tvr, JSTVU_SINGLE, string)      JS_PUSH_SINGLE_TEMP_ROOT(cx, str ? STRING_TO_JSVAL(str) : JSVAL_NULL, tvr)
938    
939  #define JS_PUSH_TEMP_ROOT_XML(cx,xml_,tvr)                                    \  #define JS_PUSH_TEMP_ROOT_XML(cx,xml_,tvr)                                    \
940      JS_PUSH_TEMP_ROOT_COMMON(cx, xml_, tvr, JSTVU_SINGLE, xml)      JS_PUSH_TEMP_ROOT_COMMON(cx, xml_, tvr, JSTVU_SINGLE, xml)
# Line 849  Line 954 
954  #define JS_PUSH_TEMP_ROOT_SCRIPT(cx,script_,tvr)                              \  #define JS_PUSH_TEMP_ROOT_SCRIPT(cx,script_,tvr)                              \
955      JS_PUSH_TEMP_ROOT_COMMON(cx, script_, tvr, JSTVU_SCRIPT, script)      JS_PUSH_TEMP_ROOT_COMMON(cx, script_, tvr, JSTVU_SCRIPT, script)
956    
   
957  #define JSRESOLVE_INFER         0xffff  /* infer bits from current bytecode */  #define JSRESOLVE_INFER         0xffff  /* infer bits from current bytecode */
958    
959  struct JSContext {  struct JSContext {
# Line 931  Line 1035 
1035      size_t              scriptStackQuota;      size_t              scriptStackQuota;
1036    
1037      /* Data shared by threads in an address space. */      /* Data shared by threads in an address space. */
1038      JSRuntime           *runtime;      JSRuntime * const   runtime;
1039    
1040        explicit JSContext(JSRuntime *rt) : runtime(rt) {}
1041    
1042      /* Stack arena pool and frame pointer register. */      /* Stack arena pool and frame pointer register. */
1043      JS_REQUIRES_STACK      JS_REQUIRES_STACK
# Line 954  Line 1060 
1060    
1061      /* State for object and array toSource conversion. */      /* State for object and array toSource conversion. */
1062      JSSharpObjectMap    sharpObjectMap;      JSSharpObjectMap    sharpObjectMap;
1063        JSHashTable         *busyArrayTable;
1064    
1065      /* Argument formatter support for JS_{Convert,Push}Arguments{,VA}. */      /* Argument formatter support for JS_{Convert,Push}Arguments{,VA}. */
1066      JSArgumentFormatMap *argumentFormatMap;      JSArgumentFormatMap *argumentFormatMap;
# Line 1002  Line 1109 
1109      /* Stack of thread-stack-allocated temporary GC roots. */      /* Stack of thread-stack-allocated temporary GC roots. */
1110      JSTempValueRooter   *tempValueRooters;      JSTempValueRooter   *tempValueRooters;
1111    
 #ifdef JS_THREADSAFE  
     JSGCFreeListSet     *gcLocalFreeLists;  
 #endif  
   
1112      /* List of pre-allocated doubles. */      /* List of pre-allocated doubles. */
1113      JSGCDoubleCell      *doubleFreeList;      JSGCDoubleCell      *doubleFreeList;
1114    
1115      /* Debug hooks associated with the current context. */      /* Debug hooks associated with the current context. */
1116      JSDebugHooks        *debugHooks;      const JSDebugHooks  *debugHooks;
1117    
1118      /* Security callbacks that override any defined on the runtime. */      /* Security callbacks that override any defined on the runtime. */
1119      JSSecurityCallbacks *securityCallbacks;      JSSecurityCallbacks *securityCallbacks;
# Line 1030  Line 1133 
1133      InterpState         *interpState;      InterpState         *interpState;
1134      VMSideExit          *bailExit;      VMSideExit          *bailExit;
1135    
1136      /* Used when calling natives from trace to root the vp vector. */      /*
1137      uintN               nativeVpLen;       * True if traces may be executed. Invariant: The value of jitEnabled is
1138      jsval               *nativeVp;       * always equal to the expression in updateJITEnabled below.
1139         *
1140         * This flag and the fields accessed by updateJITEnabled are written only
1141         * in runtime->gcLock, to avoid race conditions that would leave the wrong
1142         * value in jitEnabled. (But the interpreter reads this without
1143         * locking. That can race against another thread setting debug hooks, but
1144         * we always read cx->debugHooks without locking anyway.)
1145         */
1146        bool                 jitEnabled;
1147    #endif
1148    
1149    #ifdef __cplusplus /* Allow inclusion from LiveConnect C files, */
1150    
1151        /* Caller must be holding runtime->gcLock. */
1152        void updateJITEnabled() {
1153    #ifdef JS_TRACER
1154            jitEnabled = ((options & JSOPTION_JIT) &&
1155                          !runtime->debuggerInhibitsJIT() &&
1156                          debugHooks == &runtime->globalDebugHooks);
1157    #endif
1158        }
1159    
1160    
1161    #ifdef JS_THREADSAFE
1162        inline void createDeallocatorTask() {
1163            JSThreadData* tls = JS_THREAD_DATA(this);
1164            JS_ASSERT(!tls->deallocatorTask);
1165            if (runtime->deallocatorThread && !runtime->deallocatorThread->busy())
1166                tls->deallocatorTask = new JSFreePointerListTask();
1167        }
1168    
1169        inline void submitDeallocatorTask() {
1170            JSThreadData* tls = JS_THREAD_DATA(this);
1171            if (tls->deallocatorTask) {
1172                runtime->deallocatorThread->schedule(tls->deallocatorTask);
1173                tls->deallocatorTask = NULL;
1174            }
1175        }
1176    #endif
1177    
1178        /* Call this after succesful malloc of memory for GC-related things. */
1179        inline void updateMallocCounter(size_t nbytes) {
1180            size_t *pbytes, bytes;
1181    
1182            pbytes = &JS_THREAD_DATA(this)->gcMallocBytes;
1183            bytes = *pbytes;
1184            *pbytes = (size_t(-1) - bytes <= nbytes) ? size_t(-1) : bytes + nbytes;
1185        }
1186    
1187        inline void* malloc(size_t bytes) {
1188            JS_ASSERT(bytes != 0);
1189            void *p = runtime->malloc(bytes);
1190            if (!p) {
1191                JS_ReportOutOfMemory(this);
1192                return NULL;
1193            }
1194            updateMallocCounter(bytes);
1195            return p;
1196        }
1197    
1198        inline void* mallocNoReport(size_t bytes) {
1199            JS_ASSERT(bytes != 0);
1200            void *p = runtime->malloc(bytes);
1201            if (!p)
1202                return NULL;
1203            updateMallocCounter(bytes);
1204            return p;
1205        }
1206    
1207        inline void* calloc(size_t bytes) {
1208            JS_ASSERT(bytes != 0);
1209            void *p = runtime->calloc(bytes);
1210            if (!p) {
1211                JS_ReportOutOfMemory(this);
1212                return NULL;
1213            }
1214            updateMallocCounter(bytes);
1215            return p;
1216        }
1217    
1218        inline void* realloc(void* p, size_t bytes) {
1219            void *orig = p;
1220            p = runtime->realloc(p, bytes);
1221            if (!p) {
1222                JS_ReportOutOfMemory(this);
1223                return NULL;
1224            }
1225            if (!orig)
1226                updateMallocCounter(bytes);
1227            return p;
1228        }
1229    
1230    #ifdef JS_THREADSAFE
1231        inline void free(void* p) {
1232            if (!p)
1233                return;
1234            if (thread) {
1235                JSFreePointerListTask* task = JS_THREAD_DATA(this)->deallocatorTask;
1236                if (task) {
1237                    task->add(p);
1238                    return;
1239                }
1240            }
1241            runtime->free(p);
1242        }
1243    #else
1244        inline void free(void* p) {
1245            if (!p)
1246                return;
1247            runtime->free(p);
1248        }
1249  #endif  #endif
1250    
1251        /*
1252         * In the common case that we'd like to allocate the memory for an object
1253         * with cx->malloc/free, we cannot use overloaded C++ operators (no
1254         * placement delete).  Factor the common workaround into one place.
1255         */
1256    #define CREATE_BODY(parms)                                                    \
1257        void *memory = this->malloc(sizeof(T));                                   \
1258        if (!memory) {                                                            \
1259            JS_ReportOutOfMemory(this);                                           \
1260            return NULL;                                                          \
1261        }                                                                         \
1262        return new(memory) T parms;
1263    
1264        template <class T>
1265        JS_ALWAYS_INLINE T *create() {
1266            CREATE_BODY(())
1267        }
1268    
1269        template <class T, class P1>
1270        JS_ALWAYS_INLINE T *create(const P1 &p1) {
1271            CREATE_BODY((p1))
1272        }
1273    
1274        template <class T, class P1, class P2>
1275        JS_ALWAYS_INLINE T *create(const P1 &p1, const P2 &p2) {
1276            CREATE_BODY((p1, p2))
1277        }
1278    
1279        template <class T, class P1, class P2, class P3>
1280        JS_ALWAYS_INLINE T *create(const P1 &p1, const P2 &p2, const P3 &p3) {
1281            CREATE_BODY((p1, p2, p3))
1282        }
1283    #undef CREATE_BODY
1284    
1285        template <class T>
1286        JS_ALWAYS_INLINE void destroy(T *p) {
1287            p->~T();
1288            this->free(p);
1289        }
1290    
1291    #endif /* __cplusplus */
1292  };  };
1293    
1294  #ifdef JS_THREADSAFE  #ifdef JS_THREADSAFE
# Line 1054  Line 1309 
1309  class JSAutoTempValueRooter  class JSAutoTempValueRooter
1310  {  {
1311    public:    public:
1312      JSAutoTempValueRooter(JSContext *cx, size_t len, jsval *vec)      JSAutoTempValueRooter(JSContext *cx, size_t len, jsval *vec
1313                              JS_GUARD_OBJECT_NOTIFIER_PARAM)
1314          : mContext(cx) {          : mContext(cx) {
1315            JS_GUARD_OBJECT_NOTIFIER_INIT;
1316          JS_PUSH_TEMP_ROOT(mContext, len, vec, &mTvr);          JS_PUSH_TEMP_ROOT(mContext, len, vec, &mTvr);
1317      }      }
1318      explicit JSAutoTempValueRooter(JSContext *cx, jsval v = JSVAL_NULL)      explicit JSAutoTempValueRooter(JSContext *cx, jsval v = JSVAL_NULL
1319                                       JS_GUARD_OBJECT_NOTIFIER_PARAM)
1320          : mContext(cx) {          : mContext(cx) {
1321            JS_GUARD_OBJECT_NOTIFIER_INIT;
1322          JS_PUSH_SINGLE_TEMP_ROOT(mContext, v, &mTvr);          JS_PUSH_SINGLE_TEMP_ROOT(mContext, v, &mTvr);
1323      }      }
1324      JSAutoTempValueRooter(JSContext *cx, JSString *str)      JSAutoTempValueRooter(JSContext *cx, JSString *str
1325                              JS_GUARD_OBJECT_NOTIFIER_PARAM)
1326          : mContext(cx) {          : mContext(cx) {
1327            JS_GUARD_OBJECT_NOTIFIER_INIT;
1328          JS_PUSH_TEMP_ROOT_STRING(mContext, str, &mTvr);          JS_PUSH_TEMP_ROOT_STRING(mContext, str, &mTvr);
1329      }      }
1330      JSAutoTempValueRooter(JSContext *cx, JSObject *obj)      JSAutoTempValueRooter(JSContext *cx, JSObject *obj
1331                              JS_GUARD_OBJECT_NOTIFIER_PARAM)
1332          : mContext(cx) {          : mContext(cx) {
1333            JS_GUARD_OBJECT_NOTIFIER_INIT;
1334          JS_PUSH_TEMP_ROOT_OBJECT(mContext, obj, &mTvr);          JS_PUSH_TEMP_ROOT_OBJECT(mContext, obj, &mTvr);
1335      }      }
1336    
# Line 1088  Line 1351 
1351  #endif  #endif
1352    
1353      JSTempValueRooter mTvr;      JSTempValueRooter mTvr;
1354        JS_DECL_USE_GUARD_OBJECT_NOTIFIER
1355  };  };
1356    
1357  class JSAutoTempIdRooter  class JSAutoTempIdRooter
1358  {  {
1359  public:    public:
1360      explicit JSAutoTempIdRooter(JSContext *cx, jsid id = INT_TO_JSID(0))      explicit JSAutoTempIdRooter(JSContext *cx, jsid id = INT_TO_JSID(0)
1361                                    JS_GUARD_OBJECT_NOTIFIER_PARAM)
1362          : mContext(cx) {          : mContext(cx) {
1363            JS_GUARD_OBJECT_NOTIFIER_INIT;
1364          JS_PUSH_SINGLE_TEMP_ROOT(mContext, ID_TO_VALUE(id), &mTvr);          JS_PUSH_SINGLE_TEMP_ROOT(mContext, ID_TO_VALUE(id), &mTvr);
1365      }      }
1366    
# Line 1105  Line 1371 
1371      jsid id() { return (jsid) mTvr.u.value; }      jsid id() { return (jsid) mTvr.u.value; }
1372      jsid * addr() { return (jsid *) &mTvr.u.value; }      jsid * addr() { return (jsid *) &mTvr.u.value; }
1373    
1374  private:    private:
1375      JSContext *mContext;      JSContext *mContext;
1376      JSTempValueRooter mTvr;      JSTempValueRooter mTvr;
1377        JS_DECL_USE_GUARD_OBJECT_NOTIFIER
1378    };
1379    
1380    /* The auto-root for enumeration object and its state. */
1381    class JSAutoEnumStateRooter : public JSTempValueRooter
1382    {
1383      public:
1384        JSAutoEnumStateRooter(JSContext *cx, JSObject *obj, jsval *statep
1385                              JS_GUARD_OBJECT_NOTIFIER_PARAM)
1386            : mContext(cx), mStatep(statep)
1387        {
1388            JS_GUARD_OBJECT_NOTIFIER_INIT;
1389            JS_ASSERT(obj);
1390            JS_ASSERT(statep);
1391            JS_PUSH_TEMP_ROOT_COMMON(cx, obj, this, JSTVU_ENUMERATOR, object);
1392        }
1393    
1394        ~JSAutoEnumStateRooter() {
1395            JS_POP_TEMP_ROOT(mContext, this);
1396        }
1397    
1398        void mark(JSTracer *trc) {
1399            JS_CALL_OBJECT_TRACER(trc, u.object, "enumerator_obj");
1400            js_MarkEnumeratorState(trc, u.object, *mStatep);
1401        }
1402    
1403      private:
1404        JSContext   *mContext;
1405        jsval       *mStatep;
1406        JS_DECL_USE_GUARD_OBJECT_NOTIFIER
1407  };  };
1408    
1409  class JSAutoResolveFlags  class JSAutoResolveFlags
1410  {  {
1411    public:    public:
1412      JSAutoResolveFlags(JSContext *cx, uintN flags)      JSAutoResolveFlags(JSContext *cx, uintN flags
1413                           JS_GUARD_OBJECT_NOTIFIER_PARAM)
1414          : mContext(cx), mSaved(cx->resolveFlags) {          : mContext(cx), mSaved(cx->resolveFlags) {
1415            JS_GUARD_OBJECT_NOTIFIER_INIT;
1416          cx->resolveFlags = flags;          cx->resolveFlags = flags;
1417      }      }
1418    
# Line 1123  Line 1421 
1421    private:    private:
1422      JSContext *mContext;      JSContext *mContext;
1423      uintN mSaved;      uintN mSaved;
1424        JS_DECL_USE_GUARD_OBJECT_NOTIFIER
1425  };  };
1426    
1427  #endif /* __cpluscplus */  #endif /* __cplusplus */
1428    
1429  /*  /*
1430   * Slightly more readable macros for testing per-context option settings (also   * Slightly more readable macros for testing per-context option settings (also
# Line 1170  Line 1469 
1469  #define JS_HAS_XML_OPTION(cx)           ((cx)->version & JSVERSION_HAS_XML || \  #define JS_HAS_XML_OPTION(cx)           ((cx)->version & JSVERSION_HAS_XML || \
1470                                           JSVERSION_NUMBER(cx) >= JSVERSION_1_6)                                           JSVERSION_NUMBER(cx) >= JSVERSION_1_6)
1471    
1472    extern JSThreadData *
1473    js_CurrentThreadData(JSRuntime *rt);
1474    
1475  extern JSBool  extern JSBool
1476  js_InitThreads(JSRuntime *rt);  js_InitThreads(JSRuntime *rt);
1477    
# Line 1179  Line 1481 
1481  extern void  extern void
1482  js_PurgeThreads(JSContext *cx);  js_PurgeThreads(JSContext *cx);
1483    
1484    extern void
1485    js_TraceThreads(JSRuntime *rt, JSTracer *trc);
1486    
1487  /*  /*
1488   * Ensures the JSOPTION_XML and JSOPTION_ANONFUNFIX bits of cx->options are   * Ensures the JSOPTION_XML and JSOPTION_ANONFUNFIX bits of cx->options are
1489   * reflected in cx->version, since each bit must travel with a script that has   * reflected in cx->version, since each bit must travel with a script that has
# Line 1460  Line 1765 
1765  extern jsbytecode*  extern jsbytecode*
1766  js_GetCurrentBytecodePC(JSContext* cx);  js_GetCurrentBytecodePC(JSContext* cx);
1767    
1768    #ifdef __cplusplus /* Allow inclusion from LiveConnect C files. */
1769    extern bool
1770    #else
1771    extern JSBool
1772    #endif
1773    js_CurrentPCIsInImacro(JSContext *cx);
1774    
1775  #ifdef JS_TRACER  #ifdef JS_TRACER
1776  /*  /*
1777   * Reconstruct the JS stack and clear cx->tracecx. We must be currently in a   * Reconstruct the JS stack and clear cx->tracecx. We must be currently in a
# Line 1521  Line 1833 
1833  static JS_INLINE uint32  static JS_INLINE uint32
1834  js_RegenerateShapeForGC(JSContext *cx)  js_RegenerateShapeForGC(JSContext *cx)
1835  {  {
     uint32 shape;  
   
1836      JS_ASSERT(cx->runtime->gcRunning);      JS_ASSERT(cx->runtime->gcRunning);
1837        JS_ASSERT(cx->runtime->gcRegenShapes);
1838    
1839      /*      /*
1840       * Under the GC, compared with js_GenerateShape, we don't need to use       * Under the GC, compared with js_GenerateShape, we don't need to use
1841       * atomic increments but we still must make sure that after an overflow       * atomic increments but we still must make sure that after an overflow
1842       * the shape stays such.       * the shape stays such.
1843       */       */
1844      shape = cx->runtime->shapeGen;      uint32 shape = cx->runtime->shapeGen;
1845      shape = (shape + 1) | (shape & SHAPE_OVERFLOW_BIT);      shape = (shape + 1) | (shape & SHAPE_OVERFLOW_BIT);
1846      cx->runtime->shapeGen = shape;      cx->runtime->shapeGen = shape;
1847      return shape;      return shape;
1848  }  }
1849    
 JS_END_EXTERN_C  
   
1850  #endif /* jscntxt_h___ */  #endif /* jscntxt_h___ */
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