/[jscoverage]/trunk/js/jstracer.h
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revision 459 by siliconforks, Tue Dec 9 03:37:47 2008 UTC revision 460 by siliconforks, Sat Sep 26 23:15:22 2009 UTC
# Line 1  Line 1 
1  /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-  /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2   * vim: set ts=8 sw=4 et tw=99 ft=cpp:   * vim: set ts=8 sw=4 et tw=99 ft=cpp:
3   *   *
4   * ***** BEGIN LICENSE BLOCK *****   * ***** BEGIN LICENSE BLOCK *****
# Line 66  Line 66 
66          while (_max < size)          while (_max < size)
67              _max <<= 1;              _max <<= 1;
68          _data = (T*)realloc(_data, _max * sizeof(T));          _data = (T*)realloc(_data, _max * sizeof(T));
69    #if defined(DEBUG)
70            memset(&_data[_len], 0xcd, _max - _len);
71    #endif
72      }      }
73  public:  public:
74      Queue(unsigned max = 16) {      Queue(unsigned max = 16) {
# Line 79  Line 82 
82      }      }
83    
84      bool contains(T a) {      bool contains(T a) {
85          for (unsigned n = 0; n < _len; ++n)          for (unsigned n = 0; n < _len; ++n) {
86              if (_data[n] == a)              if (_data[n] == a)
87                  return true;                  return true;
88            }
89          return false;          return false;
90      }      }
91    
# Line 112  Line 116 
116          _len = 0;          _len = 0;
117      }      }
118    
119        const T & get(unsigned i) const {
120            return _data[i];
121        }
122    
123      unsigned length() const {      unsigned length() const {
124          return _len;          return _len;
125      }      }
# Line 146  Line 154 
154      void            clear();      void            clear();
155  };  };
156    
157    #ifdef JS_JIT_SPEW
158    extern bool js_verboseDebug;
159    #define debug_only_v(x) if (js_verboseDebug) { x; fflush(stdout); }
160    #else
161    #define debug_only_v(x)
162    #endif
163    
164  /*  /*
165   * The oracle keeps track of slots that should not be demoted to int because we know them   * The oracle keeps track of hit counts for program counter locations, as
166   * to overflow or they result in type-unstable traces. We are using a simple hash table.   * well as slots that should not be demoted to int because we know them to
167   * Collisions lead to loss of optimization (demotable slots are not demoted) but have no   * overflow or they result in type-unstable traces. We are using simple
168   * correctness implications.   * hash tables.  Collisions lead to loss of optimization (demotable slots
169     * are not demoted, etc.) but have no correctness implications.
170   */   */
171  #define ORACLE_SIZE 4096  #define ORACLE_SIZE 4096
172    
173  class Oracle {  class Oracle {
174      avmplus::BitSet _dontDemote;      avmplus::BitSet _stackDontDemote;
175        avmplus::BitSet _globalDontDemote;
176  public:  public:
177      void markGlobalSlotUndemotable(JSScript* script, unsigned slot);      Oracle();
178      bool isGlobalSlotUndemotable(JSScript* script, unsigned slot) const;  
179      void markStackSlotUndemotable(JSScript* script, jsbytecode* ip, unsigned slot);      JS_REQUIRES_STACK void markGlobalSlotUndemotable(JSContext* cx, unsigned slot);
180      bool isStackSlotUndemotable(JSScript* script, jsbytecode* ip, unsigned slot) const;      JS_REQUIRES_STACK bool isGlobalSlotUndemotable(JSContext* cx, unsigned slot) const;
181      void clear();      JS_REQUIRES_STACK void markStackSlotUndemotable(JSContext* cx, unsigned slot);
182        JS_REQUIRES_STACK bool isStackSlotUndemotable(JSContext* cx, unsigned slot) const;
183        void clearDemotability();
184        void clear() {
185            clearDemotability();
186        }
187  };  };
188    
189  typedef Queue<uint16> SlotList;  typedef Queue<uint16> SlotList;
190    
191  class TypeMap : public Queue<uint8> {  class TypeMap : public Queue<uint8> {
192  public:  public:
193      void captureGlobalTypes(JSContext* cx, SlotList& slots);      JS_REQUIRES_STACK void captureTypes(JSContext* cx, SlotList& slots, unsigned callDepth);
194      void captureStackTypes(JSContext* cx, unsigned callDepth);      JS_REQUIRES_STACK void captureMissingGlobalTypes(JSContext* cx,
195                                                         SlotList& slots,
196                                                         unsigned stackSlots);
197      bool matches(TypeMap& other) const;      bool matches(TypeMap& other) const;
198  };  };
199    
200  enum ExitType {  enum ExitType {
201      BRANCH_EXIT,      /*
202      LOOP_EXIT,       * An exit at a possible branch-point in the trace at which to attach a
203         * future secondary trace. Therefore the recorder must generate different
204         * code to handle the other outcome of the branch condition from the
205         * primary trace's outcome.
206         */
207        BRANCH_EXIT,
208    
209        /*
210         * Exit at a tableswitch via a numbered case.
211         */
212        CASE_EXIT,
213    
214        /*
215         * Exit at a tableswitch via the default case.
216         */
217        DEFAULT_EXIT,
218    
219        LOOP_EXIT,
220      NESTED_EXIT,      NESTED_EXIT,
221    
222        /*
223         * An exit from a trace because a condition relied upon at recording time
224         * no longer holds, where the alternate path of execution is so rare or
225         * difficult to address in native code that it is not traced at all, e.g.
226         * negative array index accesses, which differ from positive indexes in
227         * that they require a string-based property lookup rather than a simple
228         * memory access.
229         */
230      MISMATCH_EXIT,      MISMATCH_EXIT,
231    
232        /*
233         * A specialization of MISMATCH_EXIT to handle allocation failures.
234         */
235      OOM_EXIT,      OOM_EXIT,
236      OVERFLOW_EXIT,      OVERFLOW_EXIT,
237      UNSTABLE_LOOP_EXIT,      UNSTABLE_LOOP_EXIT,
238      TIMEOUT_EXIT      TIMEOUT_EXIT,
239        DEEP_BAIL_EXIT,
240        STATUS_EXIT
241  };  };
242    
243  struct VMSideExit : public nanojit::SideExit  struct VMSideExit : public nanojit::SideExit
244  {  {
245      intptr_t ip_adj;      JSObject* block;
246        jsbytecode* pc;
247        jsbytecode* imacpc;
248      intptr_t sp_adj;      intptr_t sp_adj;
249      intptr_t rp_adj;      intptr_t rp_adj;
250      int32_t calldepth;      int32_t calldepth;
# Line 194  Line 252 
252      uint32 numStackSlots;      uint32 numStackSlots;
253      uint32 numStackSlotsBelowCurrentFrame;      uint32 numStackSlotsBelowCurrentFrame;
254      ExitType exitType;      ExitType exitType;
255    
256        /*
257         * Ordinarily 0.  If a slow native function is atop the stack, the 1 bit is
258         * set if constructing and the other bits are a pointer to the funobj.
259         */
260        uintptr_t nativeCalleeWord;
261    
262        JSObject * nativeCallee() {
263            return (JSObject *) (nativeCalleeWord & ~1);
264        }
265    
266        bool constructing() {
267            return bool(nativeCalleeWord & 1);
268        }
269    
270        void setNativeCallee(JSObject *callee, bool constructing) {
271            nativeCalleeWord = uintptr_t(callee) | (constructing ? 1 : 0);
272        }
273  };  };
274    
275  static inline uint8* getTypeMap(nanojit::SideExit* exit)  static inline uint8* getStackTypeMap(nanojit::SideExit* exit)
276  {  {
277      return (uint8*)(((VMSideExit*)exit) + 1);      return (uint8*)(((VMSideExit*)exit) + 1);
278  }  }
279    
280  struct InterpState  static inline uint8* getGlobalTypeMap(nanojit::SideExit* exit)
281    {
282        return getStackTypeMap(exit) + ((VMSideExit*)exit)->numStackSlots;
283    }
284    
285    static inline uint8* getFullTypeMap(nanojit::SideExit* exit)
286  {  {
287      void* sp; /* native stack pointer, stack[0] is spbase[0] */      return getStackTypeMap(exit);
288      void* rp; /* call stack pointer */  }
289      void* gp; /* global frame pointer */  
290      JSContext *cx; /* current VM context handle */  struct FrameInfo {
291      void* eos; /* first unusable word after the native stack */      JSObject*       callee;     // callee function object
292      void* eor; /* first unusable word after the call stack */      JSObject*       block;      // caller block chain head
293      VMSideExit* lastTreeExitGuard; /* guard we exited on during a tree call */      jsbytecode*     pc;         // caller fp->regs->pc
294      VMSideExit* lastTreeCallGuard; /* guard we want to grow from if the tree      jsbytecode*     imacpc;     // caller fp->imacpc
295                                        call exit guard mismatched */      uint16          spdist;     // distance from fp->slots to fp->regs->sp at JSOP_CALL
296      void* rpAtLastTreeCall; /* value of rp at innermost tree call guard */  
297  };      /*
298         * Bit  15 (0x8000) is a flag that is set if constructing (called through new).
299         * Bits 0-14 are the actual argument count. This may be less than fun->nargs.
300         */
301        uint16          argc;
302    
303        /*
304         * Stack pointer adjustment needed for navigation of native stack in
305         * js_GetUpvarOnTrace. spoffset is the number of slots in the native
306         * stack frame for the caller *before* the slots covered by spdist.
307         * This may be negative if the caller is the top level script.
308         * The key fact is that if we let 'cpos' be the start of the caller's
309         * native stack frame, then (cpos + spoffset) points to the first
310         * non-argument slot in the callee's native stack frame.
311         */
312        int32          spoffset;
313    
314        // Safer accessors for argc.
315        enum { CONSTRUCTING_MASK = 0x8000 };
316        void   set_argc(uint16 argc, bool constructing) {
317            this->argc = argc | (constructing ? CONSTRUCTING_MASK : 0);
318        }
319        uint16 get_argc() const { return argc & ~CONSTRUCTING_MASK; }
320        bool   is_constructing() const { return (argc & CONSTRUCTING_MASK) != 0; }
321    
322        // The typemap just before the callee is called.
323        uint8* get_typemap() { return (uint8*) (this+1); }
324    };
325    
326  struct UnstableExit  struct UnstableExit
327  {  {
# Line 223  Line 331 
331  };  };
332    
333  class TreeInfo MMGC_SUBCLASS_DECL {  class TreeInfo MMGC_SUBCLASS_DECL {
     nanojit::Fragment*      fragment;  
334  public:  public:
335        nanojit::Fragment* const      fragment;
336      JSScript*               script;      JSScript*               script;
337      unsigned                maxNativeStackSlots;      unsigned                maxNativeStackSlots;
338      ptrdiff_t               nativeStackBase;      ptrdiff_t               nativeStackBase;
339      unsigned                maxCallDepth;      unsigned                maxCallDepth;
340      TypeMap                 stackTypeMap;      TypeMap                 typeMap;
341        unsigned                nStackTypes;
342        SlotList*               globalSlots;
343        /* Dependent trees must be trashed if this tree dies, and updated on missing global types */
344      Queue<nanojit::Fragment*> dependentTrees;      Queue<nanojit::Fragment*> dependentTrees;
345        /* Linked trees must be updated on missing global types, but are not dependent */
346        Queue<nanojit::Fragment*> linkedTrees;
347      unsigned                branchCount;      unsigned                branchCount;
348      Queue<VMSideExit*>      sideExits;      Queue<VMSideExit*>      sideExits;
349      UnstableExit*           unstableExits;      UnstableExit*           unstableExits;
350    #ifdef DEBUG
351        const char*             treeFileName;
352        uintN                   treeLineNumber;
353        uintN                   treePCOffset;
354    #endif
355    
356      TreeInfo(nanojit::Fragment* _fragment) : unstableExits(NULL) {      TreeInfo(nanojit::Fragment* _fragment,
357          fragment = _fragment;               SlotList* _globalSlots)
358      }        : fragment(_fragment),
359            script(NULL),
360            maxNativeStackSlots(0),
361            nativeStackBase(0),
362            maxCallDepth(0),
363            nStackTypes(0),
364            globalSlots(_globalSlots),
365            branchCount(0),
366            unstableExits(NULL)
367                {}
368      ~TreeInfo();      ~TreeInfo();
369    
370        inline unsigned nGlobalTypes() {
371            return typeMap.length() - nStackTypes;
372        }
373        inline uint8* globalTypeMap() {
374            return typeMap.data() + nStackTypes;
375        }
376        inline uint8* stackTypeMap() {
377            return typeMap.data();
378        }
379  };  };
380    
381  struct FrameInfo {  #if defined(JS_JIT_SPEW) && (defined(NANOJIT_IA32) || (defined(NANOJIT_AMD64) && defined(__GNUC__)))
382      JSObject*       callee;     // callee function object  # define EXECUTE_TREE_TIMER
383      intptr_t        ip_adj;     // callee script-based pc index and imacro pc  #endif
384      uint8*          typemap;    // typemap for the stack frame  
385      union {  typedef enum JSBuiltinStatus {
386          struct {      JSBUILTIN_BAILED = 1,
387              uint16  spdist;     // distance from fp->slots to fp->regs->sp at JSOP_CALL      JSBUILTIN_ERROR = 2
388              uint16  argc;       // actual argument count, may be < fun->nargs  } JSBuiltinStatus;
389          } s;  
390          uint32      word;       // for spdist/argc LIR store in record_JSOP_CALL  struct InterpState
391      };  {
392        double        *sp;                  // native stack pointer, stack[0] is spbase[0]
393        FrameInfo**   rp;                   // call stack pointer
394        JSContext     *cx;                  // current VM context handle
395        double        *eos;                 // first unusable word after the native stack
396        void          *eor;                 // first unusable word after the call stack
397        VMSideExit*    lastTreeExitGuard;   // guard we exited on during a tree call
398        VMSideExit*    lastTreeCallGuard;   // guard we want to grow from if the tree
399                                            // call exit guard mismatched
400        void*          rpAtLastTreeCall;    // value of rp at innermost tree call guard
401        TreeInfo*      outermostTree;       // the outermost tree we initially invoked
402        double*        stackBase;           // native stack base
403        FrameInfo**    callstackBase;       // call stack base
404        uintN*         inlineCallCountp;    // inline call count counter
405        VMSideExit**   innermostNestedGuardp;
406        void*          stackMark;
407        VMSideExit*    innermost;
408    #ifdef EXECUTE_TREE_TIMER
409        uint64         startTime;
410    #endif
411        InterpState*   prev;
412    
413        /*
414         * Used by _FAIL builtins; see jsbuiltins.h. The builtin sets the
415         * JSBUILTIN_BAILED bit if it bails off trace and the JSBUILTIN_ERROR bit
416         * if an error or exception occurred.
417         */
418        uint32         builtinStatus;
419    
420        // Used to communicate the location of the return value in case of a deep bail.
421        double*        deepBailSp;
422    };
423    
424    static JS_INLINE void
425    js_SetBuiltinError(JSContext *cx)
426    {
427        cx->interpState->builtinStatus |= JSBUILTIN_ERROR;
428    }
429    
430    #ifdef DEBUG_JSRS_NOT_BOOL
431    struct JSRecordingStatus {
432        int code;
433        bool operator==(JSRecordingStatus &s) { return this->code == s.code; };
434        bool operator!=(JSRecordingStatus &s) { return this->code != s.code; };
435    };
436    enum JSRScodes {
437        JSRS_ERROR_code,
438        JSRS_STOP_code,
439        JSRS_CONTINUE_code,
440        JSRS_IMACRO_code
441    };
442    struct JSRecordingStatus JSRS_CONTINUE = { JSRS_CONTINUE_code };
443    struct JSRecordingStatus JSRS_STOP     = { JSRS_STOP_code };
444    struct JSRecordingStatus JSRS_IMACRO   = { JSRS_IMACRO_code };
445    struct JSRecordingStatus JSRS_ERROR    = { JSRS_ERROR_code };
446    #define STATUS_ABORTS_RECORDING(s) ((s) == JSRS_STOP || (s) == JSRS_ERROR)
447    #else
448    enum JSRecordingStatus {
449        JSRS_ERROR,        // Error; propagate to interpreter.
450        JSRS_STOP,         // Abort recording.
451        JSRS_CONTINUE,     // Continue recording.
452        JSRS_IMACRO        // Entered imacro; continue recording.
453                           // Only JSOP_IS_IMACOP opcodes may return this.
454  };  };
455    #define STATUS_ABORTS_RECORDING(s) ((s) <= JSRS_STOP)
456    #endif
457    
458    
459    
460  class TraceRecorder : public avmplus::GCObject {  class TraceRecorder : public avmplus::GCObject {
461      JSContext*              cx;      JSContext*              cx;
462      JSTraceMonitor*         traceMonitor;      JSTraceMonitor*         traceMonitor;
463      JSObject*               globalObj;      JSObject*               globalObj;
464        JSObject*               lexicalBlock;
465      Tracker                 tracker;      Tracker                 tracker;
466      Tracker                 nativeFrameTracker;      Tracker                 nativeFrameTracker;
467      char*                   entryTypeMap;      char*                   entryTypeMap;
# Line 273  Line 477 
477      nanojit::LirWriter*     cse_filter;      nanojit::LirWriter*     cse_filter;
478      nanojit::LirWriter*     expr_filter;      nanojit::LirWriter*     expr_filter;
479      nanojit::LirWriter*     func_filter;      nanojit::LirWriter*     func_filter;
 #ifdef NJ_SOFTFLOAT  
480      nanojit::LirWriter*     float_filter;      nanojit::LirWriter*     float_filter;
 #endif  
481      nanojit::LIns*          cx_ins;      nanojit::LIns*          cx_ins;
     nanojit::LIns*          gp_ins;  
482      nanojit::LIns*          eos_ins;      nanojit::LIns*          eos_ins;
483      nanojit::LIns*          eor_ins;      nanojit::LIns*          eor_ins;
484      nanojit::LIns*          rval_ins;      nanojit::LIns*          rval_ins;
485      nanojit::LIns*          inner_sp_ins;      nanojit::LIns*          inner_sp_ins;
486        nanojit::LIns*          native_rval_ins;
487        nanojit::LIns*          newobj_ins;
488      bool                    deepAborted;      bool                    deepAborted;
489      bool                    applyingArguments;      bool                    trashSelf;
490      bool                    trashTree;      Queue<nanojit::Fragment*> whichTreesToTrash;
     nanojit::Fragment*      whichTreeToTrash;  
491      Queue<jsbytecode*>      cfgMerges;      Queue<jsbytecode*>      cfgMerges;
492      jsval*                  global_dslots;      jsval*                  global_dslots;
493        JSTraceableNative*      generatedTraceableNative;
494      JSTraceableNative*      pendingTraceableNative;      JSTraceableNative*      pendingTraceableNative;
     bool                    terminate;  
     intptr_t                terminate_ip_adj;  
     nanojit::Fragment*      outerToBlacklist;  
     nanojit::Fragment*      promotedPeer;  
495      TraceRecorder*          nextRecorderToAbort;      TraceRecorder*          nextRecorderToAbort;
496      bool                    wasRootFragment;      bool                    wasRootFragment;
497        jsbytecode*             outer;     /* outer trace header PC */
498        uint32                  outerArgc; /* outer trace deepest frame argc */
499        bool                    loop;
500    
501      bool isGlobal(jsval* p) const;      bool isGlobal(jsval* p) const;
502      ptrdiff_t nativeGlobalOffset(jsval* p) const;      ptrdiff_t nativeGlobalOffset(jsval* p) const;
503      ptrdiff_t nativeStackOffset(jsval* p) const;      JS_REQUIRES_STACK ptrdiff_t nativeStackOffset(jsval* p) const;
504      void import(nanojit::LIns* base, ptrdiff_t offset, jsval* p, uint8& t,      JS_REQUIRES_STACK void import(nanojit::LIns* base, ptrdiff_t offset, jsval* p, uint8 t,
505                  const char *prefix, uintN index, JSStackFrame *fp);                                    const char *prefix, uintN index, JSStackFrame *fp);
506      void import(TreeInfo* treeInfo, nanojit::LIns* sp, unsigned ngslots, unsigned callDepth,      JS_REQUIRES_STACK void import(TreeInfo* treeInfo, nanojit::LIns* sp, unsigned stackSlots,
507                  uint8* globalTypeMap, uint8* stackTypeMap);                                    unsigned callDepth, unsigned ngslots, uint8* typeMap);
508      void trackNativeStackUse(unsigned slots);      void trackNativeStackUse(unsigned slots);
509    
510      bool lazilyImportGlobalSlot(unsigned slot);      JS_REQUIRES_STACK bool isValidSlot(JSScope* scope, JSScopeProperty* sprop);
511        JS_REQUIRES_STACK bool lazilyImportGlobalSlot(unsigned slot);
512    
513        JS_REQUIRES_STACK void guard(bool expected, nanojit::LIns* cond, ExitType exitType);
514        JS_REQUIRES_STACK void guard(bool expected, nanojit::LIns* cond, VMSideExit* exit);
515    
     nanojit::LIns* guard(bool expected, nanojit::LIns* cond, ExitType exitType);  
     nanojit::LIns* guard(bool expected, nanojit::LIns* cond, nanojit::LIns* exit);  
516      nanojit::LIns* addName(nanojit::LIns* ins, const char* name);      nanojit::LIns* addName(nanojit::LIns* ins, const char* name);
517    
     nanojit::LIns* get(jsval* p) const;  
518      nanojit::LIns* writeBack(nanojit::LIns* i, nanojit::LIns* base, ptrdiff_t offset);      nanojit::LIns* writeBack(nanojit::LIns* i, nanojit::LIns* base, ptrdiff_t offset);
519      void set(jsval* p, nanojit::LIns* l, bool initializing = false);      JS_REQUIRES_STACK void set(jsval* p, nanojit::LIns* l, bool initializing = false);
520        JS_REQUIRES_STACK nanojit::LIns* get(jsval* p);
521      bool checkType(jsval& v, uint8 t, jsval*& stage_val, nanojit::LIns*& stage_ins,      JS_REQUIRES_STACK bool known(jsval* p);
522                     unsigned& stage_count);      JS_REQUIRES_STACK void checkForGlobalObjectReallocation();
523      bool deduceTypeStability(nanojit::Fragment* root_peer, nanojit::Fragment** stable_peer,  
524                               unsigned* demotes);      JS_REQUIRES_STACK bool checkType(jsval& v, uint8 t, jsval*& stage_val,
525                                         nanojit::LIns*& stage_ins, unsigned& stage_count);
526      jsval& argval(unsigned n) const;      JS_REQUIRES_STACK bool deduceTypeStability(nanojit::Fragment* root_peer,
527      jsval& varval(unsigned n) const;                                                 nanojit::Fragment** stable_peer,
528      jsval& stackval(int n) const;                                                 bool& demote);
529    
530      nanojit::LIns* scopeChain() const;      JS_REQUIRES_STACK jsval& argval(unsigned n) const;
531      bool activeCallOrGlobalSlot(JSObject* obj, jsval*& vp);      JS_REQUIRES_STACK jsval& varval(unsigned n) const;
532        JS_REQUIRES_STACK jsval& stackval(int n) const;
533      nanojit::LIns* arg(unsigned n);  
534      void arg(unsigned n, nanojit::LIns* i);      JS_REQUIRES_STACK nanojit::LIns* scopeChain() const;
535      nanojit::LIns* var(unsigned n);      JS_REQUIRES_STACK JSRecordingStatus activeCallOrGlobalSlot(JSObject* obj, jsval*& vp);
536      void var(unsigned n, nanojit::LIns* i);  
537      nanojit::LIns* stack(int n);      JS_REQUIRES_STACK nanojit::LIns* arg(unsigned n);
538      void stack(int n, nanojit::LIns* i);      JS_REQUIRES_STACK void arg(unsigned n, nanojit::LIns* i);
539        JS_REQUIRES_STACK nanojit::LIns* var(unsigned n);
540        JS_REQUIRES_STACK void var(unsigned n, nanojit::LIns* i);
541        JS_REQUIRES_STACK nanojit::LIns* upvar(JSScript* script, JSUpvarArray* uva, uintN index, jsval& v);
542        JS_REQUIRES_STACK nanojit::LIns* stack(int n);
543        JS_REQUIRES_STACK void stack(int n, nanojit::LIns* i);
544    
545      nanojit::LIns* alu(nanojit::LOpcode op, jsdouble v0, jsdouble v1,      JS_REQUIRES_STACK nanojit::LIns* alu(nanojit::LOpcode op, jsdouble v0, jsdouble v1,
546                         nanojit::LIns* s0, nanojit::LIns* s1);                                           nanojit::LIns* s0, nanojit::LIns* s1);
547      nanojit::LIns* f2i(nanojit::LIns* f);      nanojit::LIns* f2i(nanojit::LIns* f);
548      nanojit::LIns* makeNumberInt32(nanojit::LIns* f);      JS_REQUIRES_STACK nanojit::LIns* makeNumberInt32(nanojit::LIns* f);
549      nanojit::LIns* stringify(jsval& v);      JS_REQUIRES_STACK nanojit::LIns* stringify(jsval& v);
550    
551      bool call_imacro(jsbytecode* imacro);      JS_REQUIRES_STACK JSRecordingStatus call_imacro(jsbytecode* imacro);
552    
553      bool ifop();      JS_REQUIRES_STACK JSRecordingStatus ifop();
554      bool switchop();      JS_REQUIRES_STACK JSRecordingStatus switchop();
555      bool inc(jsval& v, jsint incr, bool pre = true);  #ifdef NANOJIT_IA32
556      bool inc(jsval& v, nanojit::LIns*& v_ins, jsint incr, bool pre = true);      JS_REQUIRES_STACK nanojit::LIns* tableswitch();
557      bool incProp(jsint incr, bool pre = true);  #endif
558      bool incElem(jsint incr, bool pre = true);      JS_REQUIRES_STACK JSRecordingStatus inc(jsval& v, jsint incr, bool pre = true);
559      bool incName(jsint incr, bool pre = true);      JS_REQUIRES_STACK JSRecordingStatus inc(jsval& v, nanojit::LIns*& v_ins, jsint incr,
560                                                       bool pre = true);
561      enum { CMP_NEGATE = 1, CMP_TRY_BRANCH_AFTER_COND = 2, CMP_CASE = 4, CMP_STRICT = 8 };      JS_REQUIRES_STACK JSRecordingStatus incProp(jsint incr, bool pre = true);
562      bool cmp(nanojit::LOpcode op, int flags = 0);      JS_REQUIRES_STACK JSRecordingStatus incElem(jsint incr, bool pre = true);
563        JS_REQUIRES_STACK JSRecordingStatus incName(jsint incr, bool pre = true);
564    
565        JS_REQUIRES_STACK void strictEquality(bool equal, bool cmpCase);
566        JS_REQUIRES_STACK JSRecordingStatus equality(bool negate, bool tryBranchAfterCond);
567        JS_REQUIRES_STACK JSRecordingStatus equalityHelper(jsval l, jsval r,
568                                                           nanojit::LIns* l_ins, nanojit::LIns* r_ins,
569                                                           bool negate, bool tryBranchAfterCond,
570                                                           jsval& rval);
571        JS_REQUIRES_STACK JSRecordingStatus relational(nanojit::LOpcode op, bool tryBranchAfterCond);
572    
573      bool unary(nanojit::LOpcode op);      JS_REQUIRES_STACK JSRecordingStatus unary(nanojit::LOpcode op);
574      bool binary(nanojit::LOpcode op);      JS_REQUIRES_STACK JSRecordingStatus binary(nanojit::LOpcode op);
575    
576      bool ibinary(nanojit::LOpcode op);      bool ibinary(nanojit::LOpcode op);
577      bool iunary(nanojit::LOpcode op);      bool iunary(nanojit::LOpcode op);
578      bool bbinary(nanojit::LOpcode op);      bool bbinary(nanojit::LOpcode op);
579      void demote(jsval& v, jsdouble result);      void demote(jsval& v, jsdouble result);
580    
581      bool map_is_native(JSObjectMap* map, nanojit::LIns* map_ins, nanojit::LIns*& ops_ins,      JS_REQUIRES_STACK bool map_is_native(JSObjectMap* map, nanojit::LIns* map_ins,
582                         size_t op_offset = 0);                                           nanojit::LIns*& ops_ins, size_t op_offset = 0);
583      bool test_property_cache(JSObject* obj, nanojit::LIns* obj_ins, JSObject*& obj2,      JS_REQUIRES_STACK JSRecordingStatus test_property_cache(JSObject* obj, nanojit::LIns* obj_ins,
584                               jsuword& pcval);                                                              JSObject*& obj2, jsuword& pcval);
585      bool test_property_cache_direct_slot(JSObject* obj, nanojit::LIns* obj_ins, uint32& slot);      void stobj_set_fslot(nanojit::LIns *obj_ins, unsigned slot,
586      void stobj_set_slot(nanojit::LIns* obj_ins, unsigned slot,                           nanojit::LIns* v_ins, const char *name);
587                          nanojit::LIns*& dslots_ins, nanojit::LIns* v_ins);      void stobj_set_dslot(nanojit::LIns *obj_ins, unsigned slot, nanojit::LIns*& dslots_ins,
588                             nanojit::LIns* v_ins, const char *name);
589        void stobj_set_slot(nanojit::LIns* obj_ins, unsigned slot, nanojit::LIns*& dslots_ins,
590                            nanojit::LIns* v_ins);
591    
592      nanojit::LIns* stobj_get_fslot(nanojit::LIns* obj_ins, unsigned slot);      nanojit::LIns* stobj_get_fslot(nanojit::LIns* obj_ins, unsigned slot);
593        nanojit::LIns* stobj_get_dslot(nanojit::LIns* obj_ins, unsigned index,
594                                       nanojit::LIns*& dslots_ins);
595      nanojit::LIns* stobj_get_slot(nanojit::LIns* obj_ins, unsigned slot,      nanojit::LIns* stobj_get_slot(nanojit::LIns* obj_ins, unsigned slot,
596                                    nanojit::LIns*& dslots_ins);                                    nanojit::LIns*& dslots_ins);
597      bool native_set(nanojit::LIns* obj_ins, JSScopeProperty* sprop,      JSRecordingStatus native_set(nanojit::LIns* obj_ins, JSScopeProperty* sprop,
598                      nanojit::LIns*& dslots_ins, nanojit::LIns* v_ins);                                   nanojit::LIns*& dslots_ins, nanojit::LIns* v_ins);
599      bool native_get(nanojit::LIns* obj_ins, nanojit::LIns* pobj_ins, JSScopeProperty* sprop,      JSRecordingStatus native_get(nanojit::LIns* obj_ins, nanojit::LIns* pobj_ins,
600                      nanojit::LIns*& dslots_ins, nanojit::LIns*& v_ins);                                   JSScopeProperty* sprop, nanojit::LIns*& dslots_ins,
601                                     nanojit::LIns*& v_ins);
602      bool name(jsval*& vp);  
603      bool prop(JSObject* obj, nanojit::LIns* obj_ins, uint32& slot, nanojit::LIns*& v_ins);      nanojit::LIns* getStringLength(nanojit::LIns* str_ins);
604      bool elem(jsval& oval, jsval& idx, jsval*& vp, nanojit::LIns*& v_ins, nanojit::LIns*& addr_ins);  
605        JS_REQUIRES_STACK JSRecordingStatus name(jsval*& vp);
606      bool getProp(JSObject* obj, nanojit::LIns* obj_ins);      JS_REQUIRES_STACK JSRecordingStatus prop(JSObject* obj, nanojit::LIns* obj_ins, uint32& slot,
607      bool getProp(jsval& v);                                               nanojit::LIns*& v_ins);
608      bool getThis(nanojit::LIns*& this_ins);      JS_REQUIRES_STACK JSRecordingStatus denseArrayElement(jsval& oval, jsval& idx, jsval*& vp,
609                                                              nanojit::LIns*& v_ins,
610      bool box_jsval(jsval v, nanojit::LIns*& v_ins);                                                            nanojit::LIns*& addr_ins);
611      bool unbox_jsval(jsval v, nanojit::LIns*& v_ins);      JS_REQUIRES_STACK JSRecordingStatus getProp(JSObject* obj, nanojit::LIns* obj_ins);
612      bool guardClass(JSObject* obj, nanojit::LIns* obj_ins, JSClass* clasp,      JS_REQUIRES_STACK JSRecordingStatus getProp(jsval& v);
613                      ExitType exitType = MISMATCH_EXIT);      JS_REQUIRES_STACK JSRecordingStatus getThis(nanojit::LIns*& this_ins);
614      bool guardDenseArray(JSObject* obj, nanojit::LIns* obj_ins,  
615                           ExitType exitType = MISMATCH_EXIT);      JS_REQUIRES_STACK void box_jsval(jsval v, nanojit::LIns*& v_ins);
616      bool guardDenseArrayIndex(JSObject* obj, jsint idx, nanojit::LIns* obj_ins,      JS_REQUIRES_STACK void unbox_jsval(jsval v, nanojit::LIns*& v_ins, VMSideExit* exit);
617                                nanojit::LIns* dslots_ins, nanojit::LIns* idx_ins,      JS_REQUIRES_STACK bool guardClass(JSObject* obj, nanojit::LIns* obj_ins, JSClass* clasp,
618                                ExitType exitType);                                        VMSideExit* exit);
619      bool guardElemOp(JSObject* obj, nanojit::LIns* obj_ins, jsid id, size_t op_offset, jsval* vp);      JS_REQUIRES_STACK bool guardDenseArray(JSObject* obj, nanojit::LIns* obj_ins,
620                                               ExitType exitType = MISMATCH_EXIT);
621        JS_REQUIRES_STACK bool guardHasPrototype(JSObject* obj, nanojit::LIns* obj_ins,
622                                                 JSObject** pobj, nanojit::LIns** pobj_ins,
623                                                 VMSideExit* exit);
624        JS_REQUIRES_STACK JSRecordingStatus guardPrototypeHasNoIndexedProperties(JSObject* obj,
625                                                                                 nanojit::LIns* obj_ins,
626                                                                                 ExitType exitType);
627        JS_REQUIRES_STACK JSRecordingStatus guardNotGlobalObject(JSObject* obj,
628                                                                 nanojit::LIns* obj_ins);
629      void clearFrameSlotsFromCache();      void clearFrameSlotsFromCache();
630      bool guardShapelessCallee(jsval& callee);      JS_REQUIRES_STACK JSRecordingStatus guardCallee(jsval& callee);
631      bool interpretedFunctionCall(jsval& fval, JSFunction* fun, uintN argc, bool constructing);      JS_REQUIRES_STACK JSRecordingStatus getClassPrototype(JSObject* ctor,
632      bool functionCall(bool constructing);                                                            nanojit::LIns*& proto_ins);
633        JS_REQUIRES_STACK JSRecordingStatus getClassPrototype(JSProtoKey key,
634      void trackCfgMerges(jsbytecode* pc);                                                            nanojit::LIns*& proto_ins);
635      void flipIf(jsbytecode* pc, bool& cond);      JS_REQUIRES_STACK JSRecordingStatus newArray(JSObject* ctor, uint32 argc, jsval* argv,
636      void fuseIf(jsbytecode* pc, bool cond, nanojit::LIns* x);                                                   jsval* rval);
637        JS_REQUIRES_STACK JSRecordingStatus newString(JSObject* ctor, uint32 argc, jsval* argv,
638                                                      jsval* rval);
639        JS_REQUIRES_STACK JSRecordingStatus interpretedFunctionCall(jsval& fval, JSFunction* fun,
640                                                                    uintN argc, bool constructing);
641        JS_REQUIRES_STACK JSRecordingStatus emitNativeCall(JSTraceableNative* known, uintN argc,
642                                                           nanojit::LIns* args[]);
643        JS_REQUIRES_STACK JSRecordingStatus callTraceableNative(JSFunction* fun, uintN argc,
644                                                                bool constructing);
645        JS_REQUIRES_STACK JSRecordingStatus callNative(uintN argc, JSOp mode);
646        JS_REQUIRES_STACK JSRecordingStatus functionCall(uintN argc, JSOp mode);
647    
648        JS_REQUIRES_STACK void trackCfgMerges(jsbytecode* pc);
649        JS_REQUIRES_STACK void emitIf(jsbytecode* pc, bool cond, nanojit::LIns* x);
650        JS_REQUIRES_STACK void fuseIf(jsbytecode* pc, bool cond, nanojit::LIns* x);
651        JS_REQUIRES_STACK JSRecordingStatus checkTraceEnd(jsbytecode* pc);
652    
653      bool hasMethod(JSObject* obj, jsid id);      bool hasMethod(JSObject* obj, jsid id);
654      bool hasToStringMethod(JSObject* obj);      JS_REQUIRES_STACK bool hasIteratorMethod(JSObject* obj);
     bool hasToStringMethod(jsval v) {  
         JS_ASSERT(JSVAL_IS_OBJECT(v));  
         return hasToStringMethod(JSVAL_TO_OBJECT(v));  
     }  
     bool hasValueOfMethod(JSObject* obj);  
     bool hasValueOfMethod(jsval v) {  
         JS_ASSERT(JSVAL_IS_OBJECT(v));  
         return hasValueOfMethod(JSVAL_TO_OBJECT(v));  
     }  
     bool hasIteratorMethod(JSObject* obj);  
     bool hasIteratorMethod(jsval v) {  
         JS_ASSERT(JSVAL_IS_OBJECT(v));  
         return hasIteratorMethod(JSVAL_TO_OBJECT(v));  
     }  
655    
656  public:      JS_REQUIRES_STACK jsatomid getFullIndex(ptrdiff_t pcoff = 0);
     friend bool js_MonitorRecording(TraceRecorder* tr);  
657    
658    public:
659        JS_REQUIRES_STACK
660      TraceRecorder(JSContext* cx, VMSideExit*, nanojit::Fragment*, TreeInfo*,      TraceRecorder(JSContext* cx, VMSideExit*, nanojit::Fragment*, TreeInfo*,
661                    unsigned ngslots, uint8* globalTypeMap, uint8* stackTypeMap,                    unsigned stackSlots, unsigned ngslots, uint8* typeMap,
662                    VMSideExit* expectedInnerExit, nanojit::Fragment* outerToBlacklist);                    VMSideExit* expectedInnerExit, jsbytecode* outerTree,
663                      uint32 outerArgc);
664      ~TraceRecorder();      ~TraceRecorder();
665    
666      uint8 determineSlotType(jsval* vp) const;      static JS_REQUIRES_STACK JSRecordingStatus monitorRecording(JSContext* cx, TraceRecorder* tr,
667      nanojit::LIns* snapshot(ExitType exitType);                                                                  JSOp op);
668    
669        JS_REQUIRES_STACK uint8 determineSlotType(jsval* vp);
670    
671        /*
672         * Examines current interpreter state to record information suitable for
673         * returning to the interpreter through a side exit of the given type.
674         */
675        JS_REQUIRES_STACK VMSideExit* snapshot(ExitType exitType);
676    
677        /*
678         * Creates a separate but identical copy of the given side exit, allowing
679         * the guards associated with each to be entirely separate even after
680         * subsequent patching.
681         */
682        JS_REQUIRES_STACK VMSideExit* copy(VMSideExit* exit);
683    
684        /*
685         * Creates an instruction whose payload is a GuardRecord for the given exit.
686         * The instruction is suitable for use as the final argument of a single
687         * call to LirBuffer::insGuard; do not reuse the returned value.
688         */
689        JS_REQUIRES_STACK nanojit::LIns* createGuardRecord(VMSideExit* exit);
690    
691      nanojit::Fragment* getFragment() const { return fragment; }      nanojit::Fragment* getFragment() const { return fragment; }
692      bool isLoopHeader(JSContext* cx) const;      TreeInfo* getTreeInfo() const { return treeInfo; }
693      void compile(nanojit::Fragmento* fragmento);      JS_REQUIRES_STACK void compile(JSTraceMonitor* tm);
694      bool closeLoop(nanojit::Fragmento* fragmento, bool& demote, unsigned *demotes);      JS_REQUIRES_STACK void closeLoop(JSTraceMonitor* tm, bool& demote);
695      void endLoop(nanojit::Fragmento* fragmento);      JS_REQUIRES_STACK void endLoop(JSTraceMonitor* tm);
696      void joinEdgesToEntry(nanojit::Fragmento* fragmento, nanojit::Fragment* peer_root);      JS_REQUIRES_STACK void joinEdgesToEntry(nanojit::Fragmento* fragmento,
697                                                VMFragment* peer_root);
698      void blacklist() { fragment->blacklist(); }      void blacklist() { fragment->blacklist(); }
699      bool adjustCallerTypes(nanojit::Fragment* f, unsigned* demote_slots, bool& trash);      JS_REQUIRES_STACK void adjustCallerTypes(nanojit::Fragment* f);
700      nanojit::Fragment* findNestedCompatiblePeer(nanojit::Fragment* f, nanojit::Fragment** empty);      JS_REQUIRES_STACK nanojit::Fragment* findNestedCompatiblePeer(nanojit::Fragment* f);
701      void prepareTreeCall(nanojit::Fragment* inner);      JS_REQUIRES_STACK void prepareTreeCall(nanojit::Fragment* inner);
702      void emitTreeCall(nanojit::Fragment* inner, VMSideExit* exit);      JS_REQUIRES_STACK void emitTreeCall(nanojit::Fragment* inner, VMSideExit* exit);
703      unsigned getCallDepth() const;      unsigned getCallDepth() const;
704      void pushAbortStack();      void pushAbortStack();
705      void popAbortStack();      void popAbortStack();
706      void removeFragmentoReferences();      void removeFragmentoReferences();
707        void deepAbort();
708    
709      bool record_EnterFrame();      JS_REQUIRES_STACK JSRecordingStatus record_EnterFrame();
710      bool record_LeaveFrame();      JS_REQUIRES_STACK JSRecordingStatus record_LeaveFrame();
711      bool record_SetPropHit(JSPropCacheEntry* entry, JSScopeProperty* sprop);      JS_REQUIRES_STACK JSRecordingStatus record_SetPropHit(JSPropCacheEntry* entry,
712      bool record_SetPropMiss(JSPropCacheEntry* entry);                                                            JSScopeProperty* sprop);
713      bool record_DefLocalFunSetSlot(uint32 slot, JSObject* obj);      JS_REQUIRES_STACK JSRecordingStatus record_DefLocalFunSetSlot(uint32 slot, JSObject* obj);
714      bool record_FastNativeCallComplete();      JS_REQUIRES_STACK JSRecordingStatus record_NativeCallComplete();
     bool record_IteratorNextComplete();  
715    
     nanojit::Fragment* getOuterToBlacklist() { return outerToBlacklist; }  
     void deepAbort() { deepAborted = true; }  
716      bool wasDeepAborted() { return deepAborted; }      bool wasDeepAborted() { return deepAborted; }
     bool walkedOutOfLoop() { return terminate; }  
     void setPromotedPeer(nanojit::Fragment* peer) { promotedPeer = peer; }  
717      TreeInfo* getTreeInfo() { return treeInfo; }      TreeInfo* getTreeInfo() { return treeInfo; }
718    
719  #define OPDEF(op,val,name,token,length,nuses,ndefs,prec,format)               \  #define OPDEF(op,val,name,token,length,nuses,ndefs,prec,format)               \
720      bool record_##op();      JS_REQUIRES_STACK JSRecordingStatus record_##op();
721  # include "jsopcode.tbl"  # include "jsopcode.tbl"
722  #undef OPDEF  #undef OPDEF
723  };  };
   
724  #define TRACING_ENABLED(cx)       JS_HAS_OPTION(cx, JSOPTION_JIT)  #define TRACING_ENABLED(cx)       JS_HAS_OPTION(cx, JSOPTION_JIT)
725  #define TRACE_RECORDER(cx)        (JS_TRACE_MONITOR(cx).recorder)  #define TRACE_RECORDER(cx)        (JS_TRACE_MONITOR(cx).recorder)
726  #define SET_TRACE_RECORDER(cx,tr) (JS_TRACE_MONITOR(cx).recorder = (tr))  #define SET_TRACE_RECORDER(cx,tr) (JS_TRACE_MONITOR(cx).recorder = (tr))
727    
728  #define JSOP_IS_BINARY(op) ((uintN)((op) - JSOP_BITOR) <= (uintN)(JSOP_MOD - JSOP_BITOR))  #define JSOP_IN_RANGE(op,lo,hi)   (uintN((op) - (lo)) <= uintN((hi) - (lo)))
729    #define JSOP_IS_BINARY(op)        JSOP_IN_RANGE(op, JSOP_BITOR, JSOP_MOD)
730  /*  #define JSOP_IS_UNARY(op)         JSOP_IN_RANGE(op, JSOP_NEG, JSOP_POS)
731   * See jsinterp.cpp for the ENABLE_TRACER definition. Also note how comparing x  #define JSOP_IS_EQUALITY(op)      JSOP_IN_RANGE(op, JSOP_EQ, JSOP_NE)
  * to JSOP_* constants specializes trace-recording code at compile time either  
  * to include imacro support, or exclude it altogether for this particular x.  
  *  
  * We save macro-generated code size also via bool TraceRecorder::record_JSOP_*  
  * return type, instead of a three-state: OK, ABORTED, IMACRO_STARTED. But the  
  * price of this is the JSFRAME_IMACRO_START frame flag. We need one more bit  
  * to detect that TraceRecorder::call_imacro was invoked by the record_JSOP_*  
  * method invoked by TRACE_ARGS_.  
  */  
 #define RECORD_ARGS(x,args)                                                   \  
     JS_BEGIN_MACRO                                                            \  
         if (!js_MonitorRecording(TRACE_RECORDER(cx))) {                       \  
             ENABLE_TRACER(0);                                                 \  
         } else {                                                              \  
             TRACE_ARGS_(x, args,                                              \  
                 if ((fp->flags & JSFRAME_IMACRO_START) &&                     \  
                     (x == JSOP_ITER || x == JSOP_NEXTITER ||                  \  
                     JSOP_IS_BINARY(x))) {                                     \  
                     fp->flags &= ~JSFRAME_IMACRO_START;                       \  
                     atoms = COMMON_ATOMS_START(&rt->atomState);               \  
                     op = JSOp(*regs.pc);                                      \  
                     DO_OP();                                                  \  
                 }                                                             \  
             );                                                                \  
          }                                                                    \  
     JS_END_MACRO  
732    
733  #define TRACE_ARGS_(x,args,onfalse)                                           \  #define TRACE_ARGS_(x,args)                                                   \
734      JS_BEGIN_MACRO                                                            \      JS_BEGIN_MACRO                                                            \
735          TraceRecorder* tr_ = TRACE_RECORDER(cx);                              \          TraceRecorder* tr_ = TRACE_RECORDER(cx);                              \
736          if (tr_ && !tr_->record_##x args) {                                   \          if (tr_ && !tr_->wasDeepAborted()) {                                  \
737              onfalse                                                           \              JSRecordingStatus status = tr_->record_##x args;                  \
738              js_AbortRecording(cx, #x);                                        \              if (STATUS_ABORTS_RECORDING(status)) {                            \
739              ENABLE_TRACER(0);                                                 \                  js_AbortRecording(cx, #x);                                    \
740                    if (status == JSRS_ERROR)                                     \
741                        goto error;                                               \
742                }                                                                 \
743                JS_ASSERT(status != JSRS_IMACRO);                                 \
744          }                                                                     \          }                                                                     \
745      JS_END_MACRO      JS_END_MACRO
746    
747  #define TRACE_ARGS(x,args)      TRACE_ARGS_(x, args, )  #define TRACE_ARGS(x,args)      TRACE_ARGS_(x, args)
   
 #define RECORD(x)               RECORD_ARGS(x, ())  
748  #define TRACE_0(x)              TRACE_ARGS(x, ())  #define TRACE_0(x)              TRACE_ARGS(x, ())
749  #define TRACE_1(x,a)            TRACE_ARGS(x, (a))  #define TRACE_1(x,a)            TRACE_ARGS(x, (a))
750  #define TRACE_2(x,a,b)          TRACE_ARGS(x, (a, b))  #define TRACE_2(x,a,b)          TRACE_ARGS(x, (a, b))
751    
752  extern bool  extern JS_REQUIRES_STACK bool
753  js_MonitorLoopEdge(JSContext* cx, uintN& inlineCallCount);  js_MonitorLoopEdge(JSContext* cx, uintN& inlineCallCount);
754    
755  extern bool  #ifdef DEBUG
756  js_MonitorRecording(TraceRecorder *tr);  # define js_AbortRecording(cx, reason) js_AbortRecordingImpl(cx, reason)
757    #else
758    # define js_AbortRecording(cx, reason) js_AbortRecordingImpl(cx)
759    #endif
760    
761  extern void  extern JS_REQUIRES_STACK void
762  js_AbortRecording(JSContext* cx, const char* reason);  js_AbortRecording(JSContext* cx, const char* reason);
763    
764  extern void  extern void
# Line 535  Line 768 
768  js_FinishJIT(JSTraceMonitor *tm);  js_FinishJIT(JSTraceMonitor *tm);
769    
770  extern void  extern void
771  js_FlushJITCache(JSContext* cx);  js_PurgeScriptFragments(JSContext* cx, JSScript* script);
772    
773    extern bool
774    js_OverfullFragmento(JSTraceMonitor* tm, nanojit::Fragmento *frago);
775    
776    extern void
777    js_PurgeJITOracle();
778    
779    extern JSObject *
780    js_GetBuiltinFunction(JSContext *cx, uintN index);
781    
782  extern void  extern void
783  js_FlushJITOracle(JSContext* cx);  js_SetMaxCodeCacheBytes(JSContext* cx, uint32 bytes);
784    
785  #else  /* !JS_TRACER */  #else  /* !JS_TRACER */
786    
 #define RECORD(x)               ((void)0)  
787  #define TRACE_0(x)              ((void)0)  #define TRACE_0(x)              ((void)0)
788  #define TRACE_1(x,a)            ((void)0)  #define TRACE_1(x,a)            ((void)0)
789  #define TRACE_2(x,a,b)          ((void)0)  #define TRACE_2(x,a,b)          ((void)0)
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