/[jscoverage]/trunk/js/jsinterp.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 71  Line 71 
71      jsbytecode      *imacpc;        /* null or interpreter macro call pc */      jsbytecode      *imacpc;        /* null or interpreter macro call pc */
72      jsval           *slots;         /* variables, locals and operand stack */      jsval           *slots;         /* variables, locals and operand stack */
73      JSObject        *callobj;       /* lazily created Call object */      JSObject        *callobj;       /* lazily created Call object */
74      JSObject        *argsobj;       /* lazily created arguments object */      jsval           argsobj;        /* lazily created arguments object, must be
75                                           JSVAL_OBJECT */
76      JSObject        *varobj;        /* variables object, where vars go */      JSObject        *varobj;        /* variables object, where vars go */
     JSObject        *callee;        /* function or script object */  
77      JSScript        *script;        /* script being interpreted */      JSScript        *script;        /* script being interpreted */
78      JSFunction      *fun;           /* function being called or null */      JSFunction      *fun;           /* function being called or null */
79      JSObject        *thisp;         /* "this" pointer if in method */      JSObject        *thisp;         /* "this" pointer if in method */
# Line 90  Line 90 
90       * variables on the stack initially, note when they are closed       * variables on the stack initially, note when they are closed
91       * over, and copy those that are out to the heap when we leave       * over, and copy those that are out to the heap when we leave
92       * their dynamic scope.       * their dynamic scope.
93       *       *
94       * The bytecode compiler produces a tree of block objects       * The bytecode compiler produces a tree of block objects
95       * accompanying each JSScript representing those lexical blocks in       * accompanying each JSScript representing those lexical blocks in
96       * the script that have let-bound variables associated with them.       * the script that have let-bound variables associated with them.
# Line 102  Line 102 
102       * When we are in the static scope of such a block, blockChain       * When we are in the static scope of such a block, blockChain
103       * points to its compiler-allocated block object; otherwise, it is       * points to its compiler-allocated block object; otherwise, it is
104       * NULL.       * NULL.
105       *       *
106       * scopeChain is the current scope chain, including 'call' and       * scopeChain is the current scope chain, including 'call' and
107       * 'block' objects for those function calls and lexical blocks       * 'block' objects for those function calls and lexical blocks
108       * whose static scope we are currently executing in, and 'with'       * whose static scope we are currently executing in, and 'with'
# Line 126  Line 126 
126      JSObject        *sharpArray;    /* scope for #n= initializer vars */      JSObject        *sharpArray;    /* scope for #n= initializer vars */
127      uint32          flags;          /* frame flags -- see below */      uint32          flags;          /* frame flags -- see below */
128      JSStackFrame    *dormantNext;   /* next dormant frame chain */      JSStackFrame    *dormantNext;   /* next dormant frame chain */
     JSObject        *xmlNamespace;  /* null or default xml namespace in E4X */  
129      JSStackFrame    *displaySave;   /* previous value of display entry for      JSStackFrame    *displaySave;   /* previous value of display entry for
130                                         script->staticLevel */                                         script->staticLevel */
131    
132  #ifdef __cplusplus /* Aargh, LiveConnect, bug 442399. */  #ifdef __cplusplus /* Allow inclusion from LiveConnect C files. */
133    
134      inline void assertValidStackDepth(uintN depth);      inline void assertValidStackDepth(uintN depth);
135  #endif  
136        void putActivationObjects(JSContext *cx) {
137            /*
138             * The order of calls here is important as js_PutCallObject needs to
139             * access argsobj.
140             */
141            if (callobj) {
142                js_PutCallObject(cx, this);
143                JS_ASSERT(!argsobj);
144            } else if (argsobj) {
145                js_PutArgsObject(cx, this);
146            }
147        }
148    
149        JSObject *callee() {
150            return argv ? JSVAL_TO_OBJECT(argv[-2]) : NULL;
151        }
152    
153    #endif /* __cplusplus */
154  };  };
155    
156  #ifdef __cplusplus  #ifdef __cplusplus
157    
158  static JS_INLINE uintN  static JS_INLINE uintN
159  FramePCOffset(JSStackFrame* fp)  FramePCOffset(JSStackFrame* fp)
160  {  {
161      return uintN((fp->imacpc ? fp->imacpc : fp->regs->pc) - fp->script->code);      return uintN((fp->imacpc ? fp->imacpc : fp->regs->pc) - fp->script->code);
162  }  }
 #endif  
163    
164  static JS_INLINE jsval *  static JS_INLINE jsval *
165  StackBase(JSStackFrame *fp)  StackBase(JSStackFrame *fp)
# Line 149  Line 167 
167      return fp->slots + fp->script->nfixed;      return fp->slots + fp->script->nfixed;
168  }  }
169    
 #ifdef __cplusplus /* Aargh, LiveConnect, bug 442399. */  
170  void  void
171  JSStackFrame::assertValidStackDepth(uintN depth)  JSStackFrame::assertValidStackDepth(uintN depth)
172  {  {
173      JS_ASSERT(0 <= regs->sp - StackBase(this));      JS_ASSERT(0 <= regs->sp - StackBase(this));
174      JS_ASSERT(depth <= uintptr_t(regs->sp - StackBase(this)));      JS_ASSERT(depth <= uintptr_t(regs->sp - StackBase(this)));
175  }  }
 #endif  
176    
177  static JS_INLINE uintN  static JS_INLINE uintN
178  GlobalVarCount(JSStackFrame *fp)  GlobalVarCount(JSStackFrame *fp)
179  {  {
180      uintN n;      uintN n;
181        
182      JS_ASSERT(!fp->fun);      JS_ASSERT(!fp->fun);
183      n = fp->script->nfixed;      n = fp->script->nfixed;
184      if (fp->script->regexpsOffset != 0)      if (fp->script->regexpsOffset != 0)
185          n -= JS_SCRIPT_REGEXPS(fp->script)->length;          n -= fp->script->regexps()->length;
186      return n;      return n;
187  }  }
188    
189    #endif /* __cplusplus */
190    
191  typedef struct JSInlineFrame {  typedef struct JSInlineFrame {
192      JSStackFrame    frame;          /* base struct */      JSStackFrame    frame;          /* base struct */
193      JSFrameRegs     callerRegs;     /* parent's frame registers */      JSFrameRegs     callerRegs;     /* parent's frame registers */
# Line 189  Line 207 
207  #define JSFRAME_YIELDING       0x40 /* js_Interpret dispatched JSOP_YIELD */  #define JSFRAME_YIELDING       0x40 /* js_Interpret dispatched JSOP_YIELD */
208  #define JSFRAME_ITERATOR       0x80 /* trying to get an iterator for for-in */  #define JSFRAME_ITERATOR       0x80 /* trying to get an iterator for for-in */
209  #define JSFRAME_GENERATOR     0x200 /* frame belongs to generator-iterator */  #define JSFRAME_GENERATOR     0x200 /* frame belongs to generator-iterator */
210    #define JSFRAME_OVERRIDE_ARGS 0x400 /* overridden arguments local variable */
 #define JSFRAME_OVERRIDE_SHIFT 24   /* override bit-set params; see jsfun.c */  
 #define JSFRAME_OVERRIDE_BITS  8  
211    
212  #define JSFRAME_SPECIAL       (JSFRAME_DEBUGGER | JSFRAME_EVAL)  #define JSFRAME_SPECIAL       (JSFRAME_DEBUGGER | JSFRAME_EVAL)
213    
214  /*  /*
215   * Property cache with structurally typed capabilities for invalidation, for   * Property cache with structurally typed capabilities for invalidation, for
216   * polymorphic callsite method/get/set speedups.   * polymorphic callsite method/get/set speedups.  For details, see
217   *   * <https://developer.mozilla.org/en/SpiderMonkey/Internals/Property_cache>.
  * See bug https://bugzilla.mozilla.org/show_bug.cgi?id=365851.  
218   */   */
219  #define PROPERTY_CACHE_LOG2     12  #define PROPERTY_CACHE_LOG2     12
220  #define PROPERTY_CACHE_SIZE     JS_BIT(PROPERTY_CACHE_LOG2)  #define PROPERTY_CACHE_SIZE     JS_BIT(PROPERTY_CACHE_LOG2)
# Line 217  Line 232 
232  #define PROPERTY_CACHE_HASH_PC(pc,kshape)                                     \  #define PROPERTY_CACHE_HASH_PC(pc,kshape)                                     \
233      PROPERTY_CACHE_HASH(pc, kshape)      PROPERTY_CACHE_HASH(pc, kshape)
234    
235  #define PROPERTY_CACHE_HASH_ATOM(atom,obj,pobj)                               \  #define PROPERTY_CACHE_HASH_ATOM(atom,obj)                                    \
236      PROPERTY_CACHE_HASH((jsuword)(atom) >> 2, OBJ_SHAPE(obj))      PROPERTY_CACHE_HASH((jsuword)(atom) >> 2, OBJ_SHAPE(obj))
237    
238  /*  /*
# Line 242  Line 257 
257    
258  #define SHAPE_OVERFLOW_BIT      JS_BIT(32 - PCVCAP_TAGBITS)  #define SHAPE_OVERFLOW_BIT      JS_BIT(32 - PCVCAP_TAGBITS)
259    
 #ifndef JS_THREADSAFE  
 # define js_GenerateShape(cx, gcLocked)    js_GenerateShape (cx)  
 #endif  
   
 extern uint32  
 js_GenerateShape(JSContext *cx, JSBool gcLocked);  
   
260  struct JSPropCacheEntry {  struct JSPropCacheEntry {
261      jsbytecode          *kpc;           /* pc if vcap tag is <= 1, else atom */      jsbytecode          *kpc;           /* pc if vcap tag is <= 1, else atom */
262      jsuword             kshape;         /* key shape if pc, else obj for atom */      jsuword             kshape;         /* key shape if pc, else obj for atom */
263      jsuword             vcap;           /* value capability, see above */      jsuword             vcap;           /* value capability, see above */
264      jsuword             vword;          /* value word, see PCVAL_* below */      jsuword             vword;          /* value word, see PCVAL_* below */
265    
266    #ifdef __cplusplus /* Allow inclusion from LiveConnect C files. */
267        bool adding() const {
268            return PCVCAP_TAG(vcap) == 0 && kshape != PCVCAP_SHAPE(vcap);
269        }
270    #endif
271  };  };
272    
273  /*  /*
# Line 380  Line 394 
394          if (entry->kpc == pc && entry->kshape == kshape_) {                   \          if (entry->kpc == pc && entry->kshape == kshape_) {                   \
395              JSObject *tmp_;                                                   \              JSObject *tmp_;                                                   \
396              pobj = obj;                                                       \              pobj = obj;                                                       \
             JS_LOCK_OBJ(cx, pobj);                                            \  
397              JS_ASSERT(PCVCAP_TAG(entry->vcap) <= 1);                          \              JS_ASSERT(PCVCAP_TAG(entry->vcap) <= 1);                          \
398              if (PCVCAP_TAG(entry->vcap) == 1 &&                               \              if (PCVCAP_TAG(entry->vcap) == 1 &&                               \
399                  (tmp_ = LOCKED_OBJ_GET_PROTO(pobj)) != NULL &&                \                  (tmp_ = OBJ_GET_PROTO(cx, pobj)) != NULL) {                   \
                 OBJ_IS_NATIVE(tmp_)) {                                        \  
                 JS_UNLOCK_OBJ(cx, pobj);                                      \  
400                  pobj = tmp_;                                                  \                  pobj = tmp_;                                                  \
                 JS_LOCK_OBJ(cx, pobj);                                        \  
401              }                                                                 \              }                                                                 \
402              if (PCVCAP_SHAPE(entry->vcap) == OBJ_SHAPE(pobj)) {               \                                                                                \
403                if (JS_LOCK_OBJ_IF_SHAPE(cx, pobj, PCVCAP_SHAPE(entry->vcap))) {  \
404                  PCMETER(cache_->pchits++);                                    \                  PCMETER(cache_->pchits++);                                    \
405                  PCMETER(!PCVCAP_TAG(entry->vcap) || cache_->protopchits++);   \                  PCMETER(!PCVCAP_TAG(entry->vcap) || cache_->protopchits++);   \
                 pobj = OBJ_SCOPE(pobj)->object;                               \  
406                  atom = NULL;                                                  \                  atom = NULL;                                                  \
407                  break;                                                        \                  break;                                                        \
408              }                                                                 \              }                                                                 \
             JS_UNLOCK_OBJ(cx, pobj);                                          \  
409          }                                                                     \          }                                                                     \
410          atom = js_FullTestPropertyCache(cx, pc, &obj, &pobj, &entry);         \          atom = js_FullTestPropertyCache(cx, pc, &obj, &pobj, &entry);         \
411          if (atom)                                                             \          if (atom)                                                             \
# Line 469  Line 478 
478  static JS_INLINE JSObject *  static JS_INLINE JSObject *
479  js_ComputeThisForFrame(JSContext *cx, JSStackFrame *fp)  js_ComputeThisForFrame(JSContext *cx, JSStackFrame *fp)
480  {  {
     JSObject* obj;  
481      if (fp->flags & JSFRAME_COMPUTED_THIS)      if (fp->flags & JSFRAME_COMPUTED_THIS)
482          return fp->thisp;          return fp->thisp;
483      obj = js_ComputeThis(cx, JS_TRUE, fp->argv);      JSObject* obj = js_ComputeThis(cx, JS_TRUE, fp->argv);
484      if (!obj)      if (!obj)
485          return NULL;          return NULL;
486      fp->thisp = obj;      fp->thisp = obj;
# Line 551  Line 559 
559  extern JSBool  extern JSBool
560  js_StrictlyEqual(JSContext *cx, jsval lval, jsval rval);  js_StrictlyEqual(JSContext *cx, jsval lval, jsval rval);
561    
562    /* === except that NaN is the same as NaN and -0 is not the same as +0. */
563    extern JSBool
564    js_SameValue(jsval v1, jsval v2, JSContext *cx);
565    
566  extern JSBool  extern JSBool
567  js_InternNonIntElementId(JSContext *cx, JSObject *obj, jsval idval, jsid *idp);  js_InternNonIntElementId(JSContext *cx, JSObject *obj, jsval idval, jsid *idp);
568    
569  /* Work around liveconnect building this file as C on 1.9.1 branch */  #ifdef __cplusplus /* Allow inclusion from LiveConnect C files. */
 #ifdef __cplusplus  
570    
571  /*  /*
572   * Given an active context, a static scope level, and an upvar cookie, return   * Given an active context, a static scope level, and an upvar cookie, return
# Line 564  Line 575 
575  extern jsval&  extern jsval&
576  js_GetUpvar(JSContext *cx, uintN level, uintN cookie);  js_GetUpvar(JSContext *cx, uintN level, uintN cookie);
577    
578  #endif  #endif /* __cplusplus */
579    
580  /*  /*
581   * JS_LONE_INTERPRET indicates that the compiler should see just the code for   * JS_LONE_INTERPRET indicates that the compiler should see just the code for
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