mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
bug 491126 - sharing object map for non-native objects. r=brendan
This commit is contained in:
parent
6ffa7ccf08
commit
92f94e451c
@ -2953,7 +2953,7 @@ JS_SealObject(JSContext *cx, JSObject *obj, JSBool deep)
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return JS_TRUE;
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/* Walk slots in obj and if any value is a non-null object, seal it. */
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nslots = scope->map.freeslot;
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nslots = scope->freeslot;
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for (i = 0; i != nslots; ++i) {
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v = STOBJ_GET_SLOT(obj, i);
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if (JSVAL_IS_PRIMITIVE(v))
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@ -1199,35 +1199,12 @@ array_trace(JSTracer *trc, JSObject *obj)
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}
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}
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static JSObjectMap *
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array_newObjectMap(JSContext *cx, jsrefcount nrefs, JSObjectOps *ops,
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JSClass *clasp, JSObject *obj)
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{
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#ifdef DEBUG
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extern JSClass js_ArrayClass;
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extern JSObjectOps js_ArrayObjectOps;
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#endif
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JSObjectMap *map = (JSObjectMap *) JS_malloc(cx, sizeof(*map));
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if (!map)
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return NULL;
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extern JSObjectOps js_ArrayObjectOps;
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map->nrefs = nrefs;
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JS_ASSERT(ops == &js_ArrayObjectOps);
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map->ops = ops;
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JS_ASSERT(clasp == &js_ArrayClass);
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map->freeslot = JSSLOT_FREE(clasp);
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return map;
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}
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void
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array_destroyObjectMap(JSContext *cx, JSObjectMap *map)
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{
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JS_free(cx, map);
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}
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static const JSObjectMap SharedArrayMap = { &js_ArrayObjectOps };
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JSObjectOps js_ArrayObjectOps = {
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array_newObjectMap, array_destroyObjectMap,
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&SharedArrayMap,
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array_lookupProperty, array_defineProperty,
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array_getProperty, array_setProperty,
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array_getAttributes, array_setAttributes,
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@ -1271,27 +1248,24 @@ JSClass js_SlowArrayClass = {
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JSBool
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js_MakeArraySlow(JSContext *cx, JSObject *obj)
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{
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JSObjectMap *map, *oldmap;
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uint32 i, capacity;
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JS_ASSERT(OBJ_GET_CLASS(cx, obj) == &js_ArrayClass);
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/* Create a native scope. */
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map = js_NewObjectMap(cx, obj->map->nrefs, &js_SlowArrayObjectOps,
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&js_SlowArrayClass, obj);
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if (!map)
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JSScope *scope = js_NewScope(cx, &js_SlowArrayObjectOps,
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&js_SlowArrayClass, obj);
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if (!scope)
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return JS_FALSE;
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capacity = js_DenseArrayCapacity(obj);
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uint32 capacity = js_DenseArrayCapacity(obj);
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if (capacity) {
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map->freeslot = STOBJ_NSLOTS(obj) + JS_INITIAL_NSLOTS;
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scope->freeslot = STOBJ_NSLOTS(obj) + JS_INITIAL_NSLOTS;
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obj->dslots[-1] = JS_INITIAL_NSLOTS + capacity;
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} else {
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map->freeslot = STOBJ_NSLOTS(obj);
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scope->freeslot = STOBJ_NSLOTS(obj);
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}
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/* Create new properties pointing to existing values in dslots */
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for (i = 0; i < capacity; i++) {
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for (uint32 i = 0; i < capacity; i++) {
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jsid id;
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JSScopeProperty *sprop;
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@ -1303,7 +1277,7 @@ js_MakeArraySlow(JSContext *cx, JSObject *obj)
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continue;
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}
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sprop = js_AddScopeProperty(cx, (JSScope *)map, id, NULL, NULL,
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sprop = js_AddScopeProperty(cx, scope, id, NULL, NULL,
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i + JS_INITIAL_NSLOTS, JSPROP_ENUMERATE,
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0, 0);
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if (!sprop)
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@ -1327,15 +1301,11 @@ js_MakeArraySlow(JSContext *cx, JSObject *obj)
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obj->classword ^= (jsuword) &js_ArrayClass;
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obj->classword |= (jsuword) &js_SlowArrayClass;
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/* Swap in our new map. */
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oldmap = obj->map;
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obj->map = map;
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array_destroyObjectMap(cx, oldmap);
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obj->map = &scope->map;
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return JS_TRUE;
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out_bad:
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js_DestroyObjectMap(cx, map);
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out_bad:
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js_DestroyScope(cx, scope);
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return JS_FALSE;
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}
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@ -3387,9 +3357,9 @@ js_NewEmptyArray(JSContext* cx, JSObject* proto)
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if (!obj)
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return NULL;
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JSClass* clasp = &js_ArrayClass;
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obj->classword = jsuword(clasp);
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/* Initialize all fields of JSObject. */
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obj->map = const_cast<JSObjectMap *>(&SharedArrayMap);
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obj->classword = jsuword(&js_ArrayClass);
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obj->fslots[JSSLOT_PROTO] = OBJECT_TO_JSVAL(proto);
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obj->fslots[JSSLOT_PARENT] = proto->fslots[JSSLOT_PARENT];
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@ -3397,11 +3367,6 @@ js_NewEmptyArray(JSContext* cx, JSObject* proto)
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obj->fslots[JSSLOT_ARRAY_COUNT] = 0;
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for (unsigned i = JSSLOT_ARRAY_COUNT + 1; i != JS_INITIAL_NSLOTS; ++i)
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obj->fslots[i] = JSVAL_VOID;
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JSObjectOps* ops = clasp->getObjectOps(cx, clasp);
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obj->map = ops->newObjectMap(cx, 1, ops, clasp, obj);
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if (!obj->map)
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return NULL;
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obj->dslots = NULL;
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return obj;
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}
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@ -258,10 +258,10 @@ js_AddProperty(JSContext* cx, JSObject* obj, JSScopeProperty* sprop)
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}
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slot = sprop->slot;
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if (!scope->table && sprop->parent == scope->lastProp && slot == scope->map.freeslot) {
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if (!scope->table && sprop->parent == scope->lastProp && slot == scope->freeslot) {
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if (slot < STOBJ_NSLOTS(obj) && !OBJ_GET_CLASS(cx, obj)->reserveSlots) {
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JS_ASSERT(JSVAL_IS_VOID(STOBJ_GET_SLOT(obj, scope->map.freeslot)));
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++scope->map.freeslot;
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JS_ASSERT(JSVAL_IS_VOID(STOBJ_GET_SLOT(obj, scope->freeslot)));
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++scope->freeslot;
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} else {
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if (!js_AllocSlot(cx, obj, &slot))
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goto exit_trace;
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@ -398,26 +398,27 @@ js_Arguments(JSContext* cx)
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JS_DEFINE_CALLINFO_1(extern, OBJECT, js_Arguments, CONTEXT, 0, 0)
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JSObject* FASTCALL
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js_NewNullClosure(JSContext* cx, JSObject* funobj, JSObject* proto, JSObject *parent)
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js_NewNullClosure(JSContext* cx, JSObject* funobj, JSObject* proto, JSObject* parent)
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{
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JS_ASSERT(HAS_FUNCTION_CLASS(funobj));
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JS_ASSERT(HAS_FUNCTION_CLASS(proto));
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JS_ASSERT(JS_ON_TRACE(cx));
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JSFunction *fun = (JSFunction*) funobj;
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JS_ASSERT(GET_FUNCTION_PRIVATE(cx, funobj) == fun);
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JS_ASSERT(JS_ON_TRACE(cx));
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JSObject* closure = (JSObject*) js_NewGCThing(cx, GCX_OBJECT, sizeof(JSObject));
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if (!closure)
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return NULL;
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js_HoldScope(OBJ_SCOPE(proto));
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closure->map = proto->map;
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closure->classword = jsuword(&js_FunctionClass);
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closure->fslots[JSSLOT_PROTO] = OBJECT_TO_JSVAL(proto);
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closure->fslots[JSSLOT_PARENT] = OBJECT_TO_JSVAL(parent);
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closure->fslots[JSSLOT_PRIVATE] = PRIVATE_TO_JSVAL(fun);
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for (unsigned i = JSSLOT_PRIVATE + 1; i != JS_INITIAL_NSLOTS; ++i)
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closure->fslots[i] = JSVAL_VOID;
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closure->map = js_HoldObjectMap(cx, proto->map);
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closure->dslots = NULL;
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return closure;
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}
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@ -1821,7 +1821,7 @@ EmitEnterBlock(JSContext *cx, JSParseNode *pn, JSCodeGenerator *cg)
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#endif
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}
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blockObj->map->freeslot = JSSLOT_FREE(&js_BlockClass);
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OBJ_SCOPE(blockObj)->freeslot = JSSLOT_FREE(&js_BlockClass);
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js_ReallocSlots(cx, blockObj, JSSLOT_FREE(&js_BlockClass), JS_TRUE);
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return true;
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}
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@ -718,8 +718,8 @@ js_PutCallObject(JSContext *cx, JSStackFrame *fp)
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memcpy(callobj->dslots, fp->argv, fun->nargs * sizeof(jsval));
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memcpy(callobj->dslots + fun->nargs, fp->slots,
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fun->u.i.nvars * sizeof(jsval));
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if (scope->object == callobj && n > scope->map.freeslot)
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scope->map.freeslot = n;
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if (scope->object == callobj && n > scope->freeslot)
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scope->freeslot = n;
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}
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JS_UNLOCK_SCOPE(cx, scope);
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}
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@ -4164,7 +4164,7 @@ js_Interpret(JSContext *cx)
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ASSERT_VALID_PROPERTY_CACHE_HIT(0, obj, obj2, entry);
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if (obj == obj2 && PCVAL_IS_SLOT(entry->vword)) {
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slot = PCVAL_TO_SLOT(entry->vword);
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JS_ASSERT(slot < obj->map->freeslot);
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JS_ASSERT(slot < OBJ_SCOPE(obj)->freeslot);
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rval = LOCKED_OBJ_GET_SLOT(obj, slot);
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if (JS_LIKELY(CAN_DO_FAST_INC_DEC(rval))) {
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rtmp = rval;
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@ -4420,7 +4420,7 @@ js_Interpret(JSContext *cx)
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rval = PCVAL_OBJECT_TO_JSVAL(entry->vword);
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} else if (PCVAL_IS_SLOT(entry->vword)) {
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slot = PCVAL_TO_SLOT(entry->vword);
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JS_ASSERT(slot < obj2->map->freeslot);
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JS_ASSERT(slot < OBJ_SCOPE(obj2)->freeslot);
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rval = LOCKED_OBJ_GET_SLOT(obj2, slot);
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} else {
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JS_ASSERT(PCVAL_IS_SPROP(entry->vword));
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@ -4511,7 +4511,7 @@ js_Interpret(JSContext *cx)
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rval = PCVAL_OBJECT_TO_JSVAL(entry->vword);
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} else if (PCVAL_IS_SLOT(entry->vword)) {
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slot = PCVAL_TO_SLOT(entry->vword);
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JS_ASSERT(slot < obj2->map->freeslot);
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JS_ASSERT(slot < OBJ_SCOPE(obj2)->freeslot);
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rval = LOCKED_OBJ_GET_SLOT(obj2, slot);
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} else {
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JS_ASSERT(PCVAL_IS_SPROP(entry->vword));
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@ -4656,7 +4656,7 @@ js_Interpret(JSContext *cx)
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if (checkForAdd &&
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SPROP_HAS_STUB_SETTER(sprop) &&
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(slot = sprop->slot) == scope->map.freeslot) {
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(slot = sprop->slot) == scope->freeslot) {
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/*
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* Fast path: adding a plain old property that
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* was once at the frontier of the property
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@ -4681,7 +4681,7 @@ js_Interpret(JSContext *cx)
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*/
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if (slot < STOBJ_NSLOTS(obj) &&
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!OBJ_GET_CLASS(cx, obj)->reserveSlots) {
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++scope->map.freeslot;
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++scope->freeslot;
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} else {
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if (!js_AllocSlot(cx, obj, &slot)) {
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JS_UNLOCK_SCOPE(cx, scope);
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@ -5262,7 +5262,7 @@ js_Interpret(JSContext *cx)
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if (PCVAL_IS_SLOT(entry->vword)) {
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slot = PCVAL_TO_SLOT(entry->vword);
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JS_ASSERT(slot < obj2->map->freeslot);
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JS_ASSERT(slot < OBJ_SCOPE(obj2)->freeslot);
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rval = LOCKED_OBJ_GET_SLOT(obj2, slot);
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JS_UNLOCK_OBJ(cx, obj2);
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goto do_push_rval;
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@ -5742,7 +5742,7 @@ js_Interpret(JSContext *cx)
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index = GET_UINT16(regs.pc);
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JS_ASSERT(JS_INITIAL_NSLOTS + index < jsatomid(obj->dslots[-1]));
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JS_ASSERT_IF(OBJ_SCOPE(obj)->object == obj,
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JS_INITIAL_NSLOTS + index < obj->map->freeslot);
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JS_INITIAL_NSLOTS + index < OBJ_SCOPE(obj)->freeslot);
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PUSH_OPND(obj->dslots[index]);
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if (op == JSOP_CALLDSLOT)
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@ -6371,9 +6371,9 @@ js_Interpret(JSContext *cx)
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!SCOPE_HAS_PROPERTY(scope, sprop));
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slot = sprop->slot;
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JS_ASSERT(slot == scope->map.freeslot);
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JS_ASSERT(slot == scope->freeslot);
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if (slot < STOBJ_NSLOTS(obj)) {
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++scope->map.freeslot;
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++scope->freeslot;
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} else {
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if (!js_AllocSlot(cx, obj, &slot)) {
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JS_UNLOCK_SCOPE(cx, scope);
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@ -57,11 +57,6 @@
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#include "jsscope.h"
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#include "jsstr.h"
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/*
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* Check that we can cast the data after JSObjectMap as JSTitle.
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*/
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JS_STATIC_ASSERT(offsetof(JSScope, title) == sizeof(JSObjectMap));
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#define ReadWord(W) (W)
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/* Implement NativeCompareAndSwap. */
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@ -456,7 +451,6 @@ ShareTitle(JSContext *cx, JSTitle *title)
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static void
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FinishSharingTitle(JSContext *cx, JSTitle *title)
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{
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JSObjectMap *map;
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JSScope *scope;
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JSObject *obj;
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uint32 nslots, i;
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@ -464,14 +458,10 @@ FinishSharingTitle(JSContext *cx, JSTitle *title)
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js_InitLock(&title->lock);
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title->u.count = 0; /* NULL may not pun as 0 */
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map = TITLE_TO_MAP(title);
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if (!MAP_IS_NATIVE(map))
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return;
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scope = (JSScope *)map;
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scope = TITLE_TO_SCOPE(title);
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obj = scope->object;
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if (obj) {
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nslots = scope->map.freeslot;
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nslots = scope->freeslot;
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for (i = 0; i != nslots; ++i) {
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v = STOBJ_GET_SLOT(obj, i);
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if (JSVAL_IS_STRING(v) &&
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@ -617,9 +607,9 @@ ClaimTitle(JSTitle *title, JSContext *cx)
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* non-null test, and avoid double-insertion bugs.
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*/
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if (!title->u.link) {
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js_HoldScope(TITLE_TO_SCOPE(title));
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title->u.link = rt->titleSharingTodo;
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rt->titleSharingTodo = title;
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js_HoldObjectMap(cx, TITLE_TO_MAP(title));
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}
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/*
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@ -693,13 +683,13 @@ js_ShareWaitingTitles(JSContext *cx)
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title->u.link = NULL; /* null u.link for sanity ASAP */
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/*
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* If js_DropObjectMap returns null, we held the last ref to scope.
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* The waiting thread(s) must have been killed, after which the GC
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* If js_DropScope returns false, we held the last ref to scope. The
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* waiting thread(s) must have been killed, after which the GC
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* collected the object that held this scope. Unlikely, because it
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* requires that the GC ran (e.g., from an operation callback)
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* during this request, but possible.
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*/
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if (js_DropObjectMap(cx, TITLE_TO_MAP(title), NULL)) {
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if (js_DropScope(cx, TITLE_TO_SCOPE(title), NULL)) {
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FinishSharingTitle(cx, title); /* set ownercx = NULL */
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shared = true;
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}
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@ -740,7 +730,7 @@ js_GetSlotThreadSafe(JSContext *cx, JSObject *obj, uint32 slot)
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scope = OBJ_SCOPE(obj);
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title = &scope->title;
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JS_ASSERT(title->ownercx != cx);
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JS_ASSERT(slot < obj->map->freeslot);
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JS_ASSERT(slot < scope->freeslot);
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/*
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* Avoid locking if called from the GC. Also avoid locking an object
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@ -835,7 +825,7 @@ js_SetSlotThreadSafe(JSContext *cx, JSObject *obj, uint32 slot, jsval v)
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scope = OBJ_SCOPE(obj);
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title = &scope->title;
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JS_ASSERT(title->ownercx != cx);
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JS_ASSERT(slot < obj->map->freeslot);
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JS_ASSERT(slot < scope->freeslot);
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/*
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* Avoid locking if called from the GC. Also avoid locking an object
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@ -1478,9 +1468,7 @@ js_IsRuntimeLocked(JSRuntime *rt)
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JSBool
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js_IsObjLocked(JSContext *cx, JSObject *obj)
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{
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JSScope *scope = OBJ_SCOPE(obj);
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return MAP_IS_NATIVE(&scope->map) && js_IsTitleLocked(cx, &scope->title);
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return js_IsTitleLocked(cx, &OBJ_SCOPE(obj)->title);
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}
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JSBool
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@ -103,14 +103,10 @@ struct JSTitle {
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};
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/*
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* Title structures must be immediately preceded by JSObjectMap structures for
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* maps that use titles for threadsafety. This is enforced by assertion in
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* jsscope.h; see bug 408416 for future remedies to this somewhat fragile
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* architecture.
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* Title structure is always allocated as a field of JSScope.
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*/
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#define TITLE_TO_MAP(title) \
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((JSObjectMap *)((char *)(title) - sizeof(JSObjectMap)))
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#define TITLE_TO_SCOPE(title) \
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((JSScope *)((uint8 *) (title) - offsetof(JSScope, title)))
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/*
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* Atomic increment and decrement for a reference counter, given jsrefcount *p.
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|
259
js/src/jsobj.cpp
259
js/src/jsobj.cpp
@ -102,7 +102,7 @@ js_DropProperty(JSContext *cx, JSObject *obj, JSProperty *prop);
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#endif
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JS_FRIEND_DATA(JSObjectOps) js_ObjectOps = {
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js_NewObjectMap, js_DestroyObjectMap,
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NULL,
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js_LookupProperty, js_DefineProperty,
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js_GetProperty, js_SetProperty,
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js_GetAttributes, js_SetAttributes,
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@ -2033,9 +2033,12 @@ js_Object(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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}
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|
||||
static inline bool
|
||||
CreateMapForObject(JSContext* cx, JSObject* obj, JSObject* proto, JSObjectOps* ops)
|
||||
InitScopeForObject(JSContext* cx, JSObject* obj, JSObject* proto,
|
||||
JSObjectOps* ops)
|
||||
{
|
||||
JSObjectMap* map;
|
||||
JS_ASSERT(OPS_IS_NATIVE(ops));
|
||||
JS_ASSERT(proto == OBJ_GET_PROTO(cx, obj));
|
||||
|
||||
JSClass* protoclasp;
|
||||
JSClass* clasp = OBJ_GET_CLASS(cx, obj);
|
||||
|
||||
@ -2048,33 +2051,36 @@ CreateMapForObject(JSContext* cx, JSObject* obj, JSObject* proto, JSObjectOps* o
|
||||
* object classes must have the same (null or not) reserveSlots hook.
|
||||
*/
|
||||
if (proto &&
|
||||
((map = proto->map)->ops == ops &&
|
||||
((protoclasp = OBJ_GET_CLASS(cx, proto)) == clasp ||
|
||||
(!((protoclasp->flags ^ clasp->flags) &
|
||||
(JSCLASS_HAS_PRIVATE |
|
||||
(JSCLASS_RESERVED_SLOTS_MASK << JSCLASS_RESERVED_SLOTS_SHIFT))) &&
|
||||
protoclasp->reserveSlots == clasp->reserveSlots))))
|
||||
proto->map->ops == ops &&
|
||||
((protoclasp = OBJ_GET_CLASS(cx, proto)) == clasp ||
|
||||
(!((protoclasp->flags ^ clasp->flags) &
|
||||
(JSCLASS_HAS_PRIVATE |
|
||||
(JSCLASS_RESERVED_SLOTS_MASK << JSCLASS_RESERVED_SLOTS_SHIFT))) &&
|
||||
protoclasp->reserveSlots == clasp->reserveSlots)))
|
||||
{
|
||||
/* Share the given prototype's map. */
|
||||
obj->map = js_HoldObjectMap(cx, map);
|
||||
js_HoldScope(OBJ_SCOPE(proto));
|
||||
obj->map = proto->map;
|
||||
return true;
|
||||
}
|
||||
|
||||
map = ops->newObjectMap(cx, 1, ops, clasp, obj);
|
||||
if (!map)
|
||||
return false;
|
||||
obj->map = map;
|
||||
JSScope *scope = js_NewScope(cx, ops, clasp, obj);
|
||||
if (!scope)
|
||||
goto bad;
|
||||
|
||||
/* Let ops->newObjectMap set freeslot so as to reserve slots. */
|
||||
uint32 nslots = map->freeslot;
|
||||
JS_ASSERT(nslots >= JSSLOT_PRIVATE);
|
||||
if (nslots > JS_INITIAL_NSLOTS &&
|
||||
!js_ReallocSlots(cx, obj, nslots, JS_TRUE)) {
|
||||
js_DropObjectMap(cx, map, obj);
|
||||
return false;
|
||||
/* Let js_NewScope set freeslot so as to reserve slots. */
|
||||
JS_ASSERT(scope->freeslot >= JSSLOT_PRIVATE);
|
||||
if (scope->freeslot > JS_INITIAL_NSLOTS &&
|
||||
!js_ReallocSlots(cx, obj, scope->freeslot, JS_TRUE)) {
|
||||
js_DestroyScope(cx, scope);
|
||||
goto bad;
|
||||
}
|
||||
|
||||
obj->map = &scope->map;
|
||||
return true;
|
||||
|
||||
bad:
|
||||
/* Ensure that the map field is initialized for GC. */
|
||||
obj->map = NULL;
|
||||
return false;
|
||||
}
|
||||
|
||||
#ifdef JS_TRACER
|
||||
@ -2093,11 +2099,8 @@ NewNativeObject(JSContext* cx, JSClass* clasp, JSObject* proto, JSObject *parent
|
||||
for (unsigned i = JSSLOT_PRIVATE; i < JS_INITIAL_NSLOTS; ++i)
|
||||
obj->fslots[i] = JSVAL_VOID;
|
||||
|
||||
if (!CreateMapForObject(cx, obj, proto, &js_ObjectOps))
|
||||
return NULL;
|
||||
obj->dslots = NULL;
|
||||
|
||||
return obj;
|
||||
return InitScopeForObject(cx, obj, proto, &js_ObjectOps) ? obj : NULL;
|
||||
}
|
||||
|
||||
JSObject* FASTCALL
|
||||
@ -2363,7 +2366,7 @@ with_ThisObject(JSContext *cx, JSObject *obj)
|
||||
}
|
||||
|
||||
JS_FRIEND_DATA(JSObjectOps) js_WithObjectOps = {
|
||||
js_NewObjectMap, js_DestroyObjectMap,
|
||||
NULL,
|
||||
with_LookupProperty, js_DefineProperty,
|
||||
with_GetProperty, with_SetProperty,
|
||||
with_GetAttributes, with_SetAttributes,
|
||||
@ -2455,7 +2458,7 @@ js_PutBlockObject(JSContext *cx, JSBool normalUnwind)
|
||||
/*
|
||||
* Block objects should never be exposed to scripts. Thus the clone should
|
||||
* not own the property map and rather always share it with the prototype
|
||||
* object. This allows to skip updating OBJ_SCOPE(obj)->map.freeslot after
|
||||
* object. This allows us to skip updating OBJ_SCOPE(obj)->freeslot after
|
||||
* we copy the stack slots into reserved slots.
|
||||
*/
|
||||
JS_ASSERT(OBJ_SCOPE(obj)->object != obj);
|
||||
@ -2845,50 +2848,6 @@ bad:
|
||||
goto out;
|
||||
}
|
||||
|
||||
void
|
||||
js_InitObjectMap(JSObjectMap *map, jsrefcount nrefs, JSObjectOps *ops,
|
||||
JSClass *clasp)
|
||||
{
|
||||
map->nrefs = nrefs;
|
||||
map->ops = ops;
|
||||
map->freeslot = JSSLOT_FREE(clasp);
|
||||
}
|
||||
|
||||
JSObjectMap *
|
||||
js_NewObjectMap(JSContext *cx, jsrefcount nrefs, JSObjectOps *ops,
|
||||
JSClass *clasp, JSObject *obj)
|
||||
{
|
||||
return (JSObjectMap *) js_NewScope(cx, nrefs, ops, clasp, obj);
|
||||
}
|
||||
|
||||
void
|
||||
js_DestroyObjectMap(JSContext *cx, JSObjectMap *map)
|
||||
{
|
||||
js_DestroyScope(cx, (JSScope *)map);
|
||||
}
|
||||
|
||||
JSObjectMap *
|
||||
js_HoldObjectMap(JSContext *cx, JSObjectMap *map)
|
||||
{
|
||||
JS_ASSERT(map->nrefs >= 0);
|
||||
JS_ATOMIC_INCREMENT(&map->nrefs);
|
||||
return map;
|
||||
}
|
||||
|
||||
JSObjectMap *
|
||||
js_DropObjectMap(JSContext *cx, JSObjectMap *map, JSObject *obj)
|
||||
{
|
||||
JS_ASSERT(map->nrefs > 0);
|
||||
JS_ATOMIC_DECREMENT(&map->nrefs);
|
||||
if (map->nrefs == 0) {
|
||||
map->ops->destroyObjectMap(cx, map);
|
||||
return NULL;
|
||||
}
|
||||
if (MAP_IS_NATIVE(map) && ((JSScope *)map)->object == obj)
|
||||
((JSScope *)map)->object = NULL;
|
||||
return map;
|
||||
}
|
||||
|
||||
static void
|
||||
FreeSlots(JSContext *cx, JSObject *obj)
|
||||
{
|
||||
@ -3072,11 +3031,6 @@ JSObject *
|
||||
js_NewObjectWithGivenProto(JSContext *cx, JSClass *clasp, JSObject *proto,
|
||||
JSObject *parent, uintN objectSize)
|
||||
{
|
||||
JSObject *obj;
|
||||
JSObjectOps *ops;
|
||||
uint32 i;
|
||||
JSTempValueRooter tvr;
|
||||
|
||||
#ifdef INCLUDE_MOZILLA_DTRACE
|
||||
if (JAVASCRIPT_OBJECT_CREATE_START_ENABLED())
|
||||
jsdtrace_object_create_start(cx->fp, clasp);
|
||||
@ -3097,16 +3051,18 @@ js_NewObjectWithGivenProto(JSContext *cx, JSClass *clasp, JSObject *proto,
|
||||
JS_ASSERT_IF(clasp->flags & JSCLASS_IS_EXTENDED,
|
||||
((JSExtendedClass *)clasp)->equality);
|
||||
|
||||
/* Always call the class's getObjectOps hook if it has one. */
|
||||
JSObjectOps *ops = clasp->getObjectOps
|
||||
? clasp->getObjectOps(cx, clasp)
|
||||
: &js_ObjectOps;
|
||||
|
||||
/*
|
||||
* Allocate an object from the GC heap and initialize all its fields before
|
||||
* doing any operation that can potentially trigger GC.
|
||||
*/
|
||||
obj = (JSObject *) js_NewGCThing(cx, GCX_OBJECT, objectSize);
|
||||
JSObject *obj = (JSObject *) js_NewGCThing(cx, GCX_OBJECT, objectSize);
|
||||
if (!obj)
|
||||
goto earlybad;
|
||||
|
||||
obj->map = NULL;
|
||||
obj->dslots = NULL;
|
||||
goto out;
|
||||
|
||||
/*
|
||||
* Set the class slot with the initial value of the system and delegate
|
||||
@ -3117,55 +3073,54 @@ js_NewObjectWithGivenProto(JSContext *cx, JSClass *clasp, JSObject *proto,
|
||||
JS_ASSERT(!STOBJ_IS_DELEGATE(obj));
|
||||
JS_ASSERT(!STOBJ_IS_SYSTEM(obj));
|
||||
|
||||
/* Set the proto and parent properties. */
|
||||
STOBJ_SET_PROTO(obj, proto);
|
||||
STOBJ_SET_PARENT(obj, parent);
|
||||
obj->fslots[JSSLOT_PROTO] = OBJECT_TO_JSVAL(proto);
|
||||
|
||||
/*
|
||||
* Default parent to the parent of the prototype, which was set from
|
||||
* the parent of the prototype's constructor.
|
||||
*/
|
||||
obj->fslots[JSSLOT_PARENT] = OBJECT_TO_JSVAL((!parent && proto)
|
||||
? OBJ_GET_PARENT(cx, proto)
|
||||
: parent);
|
||||
|
||||
/* Initialize the remaining fixed slots. */
|
||||
for (i = JSSLOT_PRIVATE; i < JS_INITIAL_NSLOTS; ++i)
|
||||
for (uint32 i = JSSLOT_PRIVATE; i < JS_INITIAL_NSLOTS; ++i)
|
||||
obj->fslots[i] = JSVAL_VOID;
|
||||
|
||||
obj->dslots = NULL;
|
||||
|
||||
if (OPS_IS_NATIVE(ops)) {
|
||||
if (!InitScopeForObject(cx, obj, proto, ops)) {
|
||||
obj = NULL;
|
||||
goto out;
|
||||
}
|
||||
} else {
|
||||
JS_ASSERT(ops->objectMap->ops == ops);
|
||||
obj->map = const_cast<JSObjectMap *>(ops->objectMap);
|
||||
}
|
||||
|
||||
#ifdef DEBUG
|
||||
memset((uint8 *) obj + sizeof(JSObject), JS_FREE_PATTERN,
|
||||
objectSize - sizeof(JSObject));
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Root obj to prevent it from being collected out from under this call to
|
||||
* js_NewObject. There's a possibilty of GC under the objectHook call-out
|
||||
* further below.
|
||||
*/
|
||||
JS_PUSH_TEMP_ROOT_OBJECT(cx, obj, &tvr);
|
||||
|
||||
/* Always call the class's getObjectOps hook if it has one. */
|
||||
ops = clasp->getObjectOps
|
||||
? clasp->getObjectOps(cx, clasp)
|
||||
: &js_ObjectOps;
|
||||
|
||||
/*
|
||||
* Default parent to the parent of the prototype, which was set from
|
||||
* the parent of the prototype's constructor.
|
||||
*/
|
||||
if (proto && !parent)
|
||||
STOBJ_SET_PARENT(obj, OBJ_GET_PARENT(cx, proto));
|
||||
|
||||
if (!CreateMapForObject(cx, obj, proto, ops))
|
||||
goto bad;
|
||||
/* Check that the newborn root still holds the object. */
|
||||
JS_ASSERT_IF(!cx->localRootStack, cx->weakRoots.newborn[GCX_OBJECT] == obj);
|
||||
|
||||
/*
|
||||
* Do not call debug hooks on trace, because we might be in a non-_FAIL
|
||||
* builtin. See bug 481444.
|
||||
*/
|
||||
if (cx->debugHooks->objectHook && !JS_ON_TRACE(cx)) {
|
||||
JSAutoTempValueRooter tvr(cx, obj);
|
||||
JS_KEEP_ATOMS(cx->runtime);
|
||||
cx->debugHooks->objectHook(cx, obj, JS_TRUE,
|
||||
cx->debugHooks->objectHookData);
|
||||
JS_UNKEEP_ATOMS(cx->runtime);
|
||||
cx->weakRoots.newborn[GCX_OBJECT] = obj;
|
||||
}
|
||||
|
||||
out:
|
||||
JS_POP_TEMP_ROOT(cx, &tvr);
|
||||
cx->weakRoots.newborn[GCX_OBJECT] = obj;
|
||||
#ifdef INCLUDE_MOZILLA_DTRACE
|
||||
if (JAVASCRIPT_OBJECT_CREATE_ENABLED())
|
||||
jsdtrace_object_create(cx, clasp, obj);
|
||||
@ -3173,28 +3128,21 @@ out:
|
||||
jsdtrace_object_create_done(cx->fp, clasp);
|
||||
#endif
|
||||
return obj;
|
||||
|
||||
bad:
|
||||
obj = NULL;
|
||||
goto out;
|
||||
|
||||
earlybad:
|
||||
#ifdef INCLUDE_MOZILLA_DTRACE
|
||||
if (JAVASCRIPT_OBJECT_CREATE_ENABLED())
|
||||
jsdtrace_object_create(cx, clasp, NULL);
|
||||
if (JAVASCRIPT_OBJECT_CREATE_DONE_ENABLED())
|
||||
jsdtrace_object_create_done(cx->fp, clasp);
|
||||
#endif
|
||||
return NULL;
|
||||
}
|
||||
|
||||
JSObject*
|
||||
js_NewNativeObject(JSContext *cx, JSClass *clasp, JSObject *proto, uint32 slot)
|
||||
{
|
||||
JS_ASSERT(!clasp->getObjectOps);
|
||||
JS_ASSERT(proto->map->ops == &js_ObjectOps);
|
||||
JS_ASSERT(OBJ_GET_CLASS(cx, proto) == clasp);
|
||||
|
||||
JSObject* obj = (JSObject*) js_NewGCThing(cx, GCX_OBJECT, sizeof(JSObject));
|
||||
if (!obj)
|
||||
return NULL;
|
||||
|
||||
js_HoldScope(OBJ_SCOPE(proto));
|
||||
obj->map = proto->map;
|
||||
obj->classword = jsuword(clasp);
|
||||
obj->fslots[JSSLOT_PROTO] = OBJECT_TO_JSVAL(proto);
|
||||
obj->fslots[JSSLOT_PARENT] = proto->fslots[JSSLOT_PARENT];
|
||||
@ -3203,9 +3151,6 @@ js_NewNativeObject(JSContext *cx, JSClass *clasp, JSObject *proto, uint32 slot)
|
||||
while (slot < JS_INITIAL_NSLOTS)
|
||||
obj->fslots[slot++] = JSVAL_VOID;
|
||||
|
||||
JS_ASSERT(!clasp->getObjectOps);
|
||||
JS_ASSERT(proto->map->ops == &js_ObjectOps);
|
||||
obj->map = js_HoldObjectMap(cx, proto->map);
|
||||
obj->dslots = NULL;
|
||||
return obj;
|
||||
}
|
||||
@ -3456,11 +3401,8 @@ bad:
|
||||
void
|
||||
js_FinalizeObject(JSContext *cx, JSObject *obj)
|
||||
{
|
||||
JSObjectMap *map;
|
||||
|
||||
/* Cope with stillborn objects that have no map. */
|
||||
map = obj->map;
|
||||
if (!map)
|
||||
if (!obj->map)
|
||||
return;
|
||||
|
||||
if (cx->debugHooks->objectHook) {
|
||||
@ -3476,8 +3418,8 @@ js_FinalizeObject(JSContext *cx, JSObject *obj)
|
||||
jsdtrace_object_finalize(obj);
|
||||
#endif
|
||||
|
||||
/* Drop map and free slots. */
|
||||
js_DropObjectMap(cx, map, obj);
|
||||
if (OBJ_IS_NATIVE(obj))
|
||||
js_DropScope(cx, OBJ_SCOPE(obj), obj);
|
||||
FreeSlots(cx, obj);
|
||||
}
|
||||
|
||||
@ -3486,38 +3428,35 @@ js_FinalizeObject(JSContext *cx, JSObject *obj)
|
||||
JSBool
|
||||
js_AllocSlot(JSContext *cx, JSObject *obj, uint32 *slotp)
|
||||
{
|
||||
JSObjectMap *map;
|
||||
JSClass *clasp;
|
||||
JS_ASSERT(OBJ_IS_NATIVE(obj));
|
||||
|
||||
map = obj->map;
|
||||
JS_ASSERT(!MAP_IS_NATIVE(map) || ((JSScope *)map)->object == obj);
|
||||
clasp = LOCKED_OBJ_GET_CLASS(obj);
|
||||
if (map->freeslot == JSSLOT_FREE(clasp) && clasp->reserveSlots) {
|
||||
/* Adjust map->freeslot to include computed reserved slots, if any. */
|
||||
map->freeslot += clasp->reserveSlots(cx, obj);
|
||||
JSScope *scope = OBJ_SCOPE(obj);
|
||||
JSClass *clasp = LOCKED_OBJ_GET_CLASS(obj);
|
||||
if (scope->freeslot == JSSLOT_FREE(clasp) && clasp->reserveSlots) {
|
||||
/* Adjust scope->freeslot to include computed reserved slots, if any. */
|
||||
scope->freeslot += clasp->reserveSlots(cx, obj);
|
||||
}
|
||||
|
||||
if (map->freeslot >= STOBJ_NSLOTS(obj) &&
|
||||
!js_ReallocSlots(cx, obj, map->freeslot + 1, JS_FALSE)) {
|
||||
if (scope->freeslot >= STOBJ_NSLOTS(obj) &&
|
||||
!js_ReallocSlots(cx, obj, scope->freeslot + 1, JS_FALSE)) {
|
||||
return JS_FALSE;
|
||||
}
|
||||
|
||||
/* js_ReallocSlots or js_FreeSlot should set the free slots to void. */
|
||||
JS_ASSERT(JSVAL_IS_VOID(STOBJ_GET_SLOT(obj, map->freeslot)));
|
||||
*slotp = map->freeslot++;
|
||||
JS_ASSERT(JSVAL_IS_VOID(STOBJ_GET_SLOT(obj, scope->freeslot)));
|
||||
*slotp = scope->freeslot++;
|
||||
return JS_TRUE;
|
||||
}
|
||||
|
||||
void
|
||||
js_FreeSlot(JSContext *cx, JSObject *obj, uint32 slot)
|
||||
{
|
||||
JSObjectMap *map;
|
||||
JS_ASSERT(OBJ_IS_NATIVE(obj));
|
||||
|
||||
map = obj->map;
|
||||
JS_ASSERT(!MAP_IS_NATIVE(map) || ((JSScope *)map)->object == obj);
|
||||
JSScope *scope = OBJ_SCOPE(obj);
|
||||
LOCKED_OBJ_SET_SLOT(obj, slot, JSVAL_VOID);
|
||||
if (map->freeslot == slot + 1) {
|
||||
map->freeslot = slot;
|
||||
if (scope->freeslot == slot + 1) {
|
||||
scope->freeslot = slot;
|
||||
|
||||
/* When shrinking, js_ReallocSlots always returns true. */
|
||||
js_ReallocSlots(cx, obj, slot, JS_FALSE);
|
||||
@ -3914,8 +3853,7 @@ js_LookupPropertyWithFlags(JSContext *cx, JSObject *obj, jsid id, uintN flags,
|
||||
proto = OBJ_GET_PROTO(cx, proto)) {
|
||||
protoIndex++;
|
||||
}
|
||||
scope = OBJ_SCOPE(obj2);
|
||||
if (!MAP_IS_NATIVE(&scope->map)) {
|
||||
if (!OBJ_IS_NATIVE(obj2)) {
|
||||
/* Whoops, newresolve handed back a foreign obj2. */
|
||||
JS_ASSERT(obj2 != obj);
|
||||
ok = OBJ_LOOKUP_PROPERTY(cx, obj2, id, objp, propp);
|
||||
@ -3931,6 +3869,7 @@ js_LookupPropertyWithFlags(JSContext *cx, JSObject *obj, jsid id, uintN flags,
|
||||
* not on obj's proto chain. That last case is a
|
||||
* "too bad!" case.
|
||||
*/
|
||||
scope = OBJ_SCOPE(obj2);
|
||||
if (scope->object == obj2)
|
||||
sprop = SCOPE_GET_PROPERTY(scope, id);
|
||||
}
|
||||
@ -3953,8 +3892,8 @@ js_LookupPropertyWithFlags(JSContext *cx, JSObject *obj, jsid id, uintN flags,
|
||||
if (!ok)
|
||||
goto cleanup;
|
||||
JS_LOCK_OBJ(cx, obj);
|
||||
JS_ASSERT(OBJ_IS_NATIVE(obj));
|
||||
scope = OBJ_SCOPE(obj);
|
||||
JS_ASSERT(MAP_IS_NATIVE(&scope->map));
|
||||
if (scope->object == obj)
|
||||
sprop = SCOPE_GET_PROPERTY(scope, id);
|
||||
}
|
||||
@ -5842,8 +5781,8 @@ js_TraceObject(JSTracer *trc, JSObject *obj)
|
||||
* above.
|
||||
*/
|
||||
nslots = STOBJ_NSLOTS(obj);
|
||||
if (scope->object == obj && scope->map.freeslot < nslots)
|
||||
nslots = scope->map.freeslot;
|
||||
if (scope->object == obj && scope->freeslot < nslots)
|
||||
nslots = scope->freeslot;
|
||||
|
||||
for (i = 0; i != nslots; ++i) {
|
||||
v = STOBJ_GET_SLOT(obj, i);
|
||||
@ -5877,7 +5816,7 @@ js_Clear(JSContext *cx, JSObject *obj)
|
||||
n = JSSLOT_FREE(LOCKED_OBJ_GET_CLASS(obj));
|
||||
while (--i >= n)
|
||||
STOBJ_SET_SLOT(obj, i, JSVAL_VOID);
|
||||
scope->map.freeslot = n;
|
||||
scope->freeslot = n;
|
||||
}
|
||||
JS_UNLOCK_OBJ(cx, obj);
|
||||
}
|
||||
@ -5926,8 +5865,8 @@ js_SetRequiredSlot(JSContext *cx, JSObject *obj, uint32 slot, jsval v)
|
||||
}
|
||||
|
||||
/* Whether or not we grew nslots, we may need to advance freeslot. */
|
||||
if (scope->object == obj && slot >= scope->map.freeslot)
|
||||
scope->map.freeslot = slot + 1;
|
||||
if (scope->object == obj && slot >= scope->freeslot)
|
||||
scope->freeslot = slot + 1;
|
||||
|
||||
STOBJ_SET_SLOT(obj, slot, v);
|
||||
GC_POKE(cx, JS_NULL);
|
||||
@ -6131,7 +6070,7 @@ js_DumpObject(JSObject *obj)
|
||||
uint32 i, slots;
|
||||
JSClass *clasp;
|
||||
jsuint reservedEnd;
|
||||
JSBool sharesScope = JS_FALSE;
|
||||
bool sharesScope = false;
|
||||
|
||||
fprintf(stderr, "object %p\n", (void *) obj);
|
||||
clasp = STOBJ_GET_CLASS(obj);
|
||||
@ -6186,7 +6125,9 @@ js_DumpObject(JSObject *obj)
|
||||
if (clasp->flags & JSCLASS_HAS_PRIVATE)
|
||||
reservedEnd++;
|
||||
reservedEnd += JSCLASS_RESERVED_SLOTS(clasp);
|
||||
slots = sharesScope ? reservedEnd : obj->map->freeslot;
|
||||
slots = (OBJ_IS_NATIVE(obj) && !sharesScope)
|
||||
? OBJ_SCOPE(obj)->freeslot
|
||||
: STOBJ_NSLOTS(obj);
|
||||
for (i = 0; i < slots; i++) {
|
||||
fprintf(stderr, " %3d ", i);
|
||||
if (i == JSSLOT_PRIVATE && (clasp->flags & JSCLASS_HAS_PRIVATE)) {
|
||||
|
@ -56,9 +56,14 @@ JS_BEGIN_EXTERN_C
|
||||
|
||||
/* For detailed comments on these function pointer types, see jsprvtd.h. */
|
||||
struct JSObjectOps {
|
||||
/*
|
||||
* Custom shared object map for non-native objects. For native objects
|
||||
* this should be null indicating, that JSObject.map is an instance of
|
||||
* JSScope.
|
||||
*/
|
||||
const JSObjectMap *objectMap;
|
||||
|
||||
/* Mandatory non-null function pointer members. */
|
||||
JSNewObjectMapOp newObjectMap;
|
||||
JSObjectMapOp destroyObjectMap;
|
||||
JSLookupPropOp lookupProperty;
|
||||
JSDefinePropOp defineProperty;
|
||||
JSPropertyIdOp getProperty;
|
||||
@ -83,9 +88,7 @@ struct JSObjectOps {
|
||||
};
|
||||
|
||||
struct JSObjectMap {
|
||||
jsrefcount nrefs; /* count of all referencing objects */
|
||||
JSObjectOps *ops; /* high level object operation vtable */
|
||||
uint32 freeslot; /* index of next free slot in object */
|
||||
};
|
||||
|
||||
/* Shorthand macros for frequently-made calls. */
|
||||
@ -206,8 +209,8 @@ struct JSObject {
|
||||
|
||||
/*
|
||||
* STOBJ prefix means Single Threaded Object. Use the following fast macros to
|
||||
* directly manipulate slots in obj when only one thread can access obj and
|
||||
* when obj->map->freeslot can be inconsistent with slots.
|
||||
* directly manipulate slots in obj when only one thread can access obj, or
|
||||
* when accessing read-only slots within JS_INITIAL_NSLOTS.
|
||||
*/
|
||||
|
||||
#define STOBJ_NSLOTS(obj) \
|
||||
@ -266,7 +269,7 @@ STOBJ_GET_CLASS(const JSObject* obj)
|
||||
JSVAL_TO_PRIVATE(STOBJ_GET_SLOT(obj, JSSLOT_PRIVATE)))
|
||||
|
||||
#define OBJ_CHECK_SLOT(obj,slot) \
|
||||
JS_ASSERT(slot < (obj)->map->freeslot)
|
||||
JS_ASSERT_IF(OBJ_IS_NATIVE(obj), slot < OBJ_SCOPE(obj)->freeslot)
|
||||
|
||||
#define LOCKED_OBJ_GET_SLOT(obj,slot) \
|
||||
(OBJ_CHECK_SLOT(obj, slot), STOBJ_GET_SLOT(obj, slot))
|
||||
@ -368,12 +371,14 @@ STOBJ_GET_CLASS(const JSObject* obj)
|
||||
#define OBJ_GET_CLASS(cx,obj) STOBJ_GET_CLASS(obj)
|
||||
#define OBJ_GET_PRIVATE(cx,obj) STOBJ_GET_PRIVATE(obj)
|
||||
|
||||
/* Test whether a map or object is native. */
|
||||
#define MAP_IS_NATIVE(map) \
|
||||
JS_LIKELY((map)->ops == &js_ObjectOps || \
|
||||
(map)->ops->newObjectMap == js_ObjectOps.newObjectMap)
|
||||
/*
|
||||
* Test whether the object is native. FIXME bug 492938: consider how it would
|
||||
* affect the performance to do just the !ops->objectMap check.
|
||||
*/
|
||||
#define OPS_IS_NATIVE(ops) \
|
||||
JS_LIKELY((ops) == &js_ObjectOps || !(ops)->objectMap)
|
||||
|
||||
#define OBJ_IS_NATIVE(obj) MAP_IS_NATIVE((obj)->map)
|
||||
#define OBJ_IS_NATIVE(obj) OPS_IS_NATIVE((obj)->map->ops)
|
||||
|
||||
extern JS_FRIEND_DATA(JSObjectOps) js_ObjectOps;
|
||||
extern JS_FRIEND_DATA(JSObjectOps) js_WithObjectOps;
|
||||
@ -502,23 +507,6 @@ extern const char js_defineSetter_str[];
|
||||
extern const char js_lookupGetter_str[];
|
||||
extern const char js_lookupSetter_str[];
|
||||
|
||||
extern void
|
||||
js_InitObjectMap(JSObjectMap *map, jsrefcount nrefs, JSObjectOps *ops,
|
||||
JSClass *clasp);
|
||||
|
||||
extern JSObjectMap *
|
||||
js_NewObjectMap(JSContext *cx, jsrefcount nrefs, JSObjectOps *ops,
|
||||
JSClass *clasp, JSObject *obj);
|
||||
|
||||
extern void
|
||||
js_DestroyObjectMap(JSContext *cx, JSObjectMap *map);
|
||||
|
||||
extern JSObjectMap *
|
||||
js_HoldObjectMap(JSContext *cx, JSObjectMap *map);
|
||||
|
||||
extern JSObjectMap *
|
||||
js_DropObjectMap(JSContext *cx, JSObjectMap *map, JSObject *obj);
|
||||
|
||||
extern JSBool
|
||||
js_GetClassId(JSContext *cx, JSClass *clasp, jsid *idp);
|
||||
|
||||
|
@ -2973,7 +2973,7 @@ BindLet(JSContext *cx, BindData *data, JSAtom *atom, JSTreeContext *tc)
|
||||
!js_ReallocSlots(cx, blockObj, slot + 1, JS_FALSE)) {
|
||||
return JS_FALSE;
|
||||
}
|
||||
blockObj->map->freeslot = slot + 1;
|
||||
OBJ_SCOPE(blockObj)->freeslot = slot + 1;
|
||||
STOBJ_SET_SLOT(blockObj, slot, PRIVATE_TO_JSVAL(pn));
|
||||
return JS_TRUE;
|
||||
}
|
||||
|
@ -257,30 +257,6 @@ struct JSTempValueRooter {
|
||||
|
||||
/* JSObjectOps function pointer typedefs. */
|
||||
|
||||
/*
|
||||
* Create a new subclass of JSObjectMap (see jsobj.h), with the nrefs and ops
|
||||
* members initialized from the same-named parameters, and with the nslots and
|
||||
* freeslot members initialized according to ops and clasp. Return null on
|
||||
* error, non-null on success.
|
||||
*
|
||||
* JSObjectMaps are reference-counted by generic code in the engine. Usually,
|
||||
* the nrefs parameter to JSObjectOps.newObjectMap will be 1, to count the ref
|
||||
* returned to the caller on success. After a successful construction, some
|
||||
* number of js_HoldObjectMap and js_DropObjectMap calls ensue. When nrefs
|
||||
* reaches 0 due to a js_DropObjectMap call, JSObjectOps.destroyObjectMap will
|
||||
* be called to dispose of the map.
|
||||
*/
|
||||
typedef JSObjectMap *
|
||||
(* JSNewObjectMapOp)(JSContext *cx, jsrefcount nrefs, JSObjectOps *ops,
|
||||
JSClass *clasp, JSObject *obj);
|
||||
|
||||
/*
|
||||
* Generic type for an infallible JSObjectMap operation, used currently by
|
||||
* JSObjectOps.destroyObjectMap.
|
||||
*/
|
||||
typedef void
|
||||
(* JSObjectMapOp)(JSContext *cx, JSObjectMap *map);
|
||||
|
||||
/*
|
||||
* Look for id in obj and its prototype chain, returning false on error or
|
||||
* exception, true on success. On success, return null in *propp if id was
|
||||
|
@ -77,23 +77,23 @@ js_GetMutableScope(JSContext *cx, JSObject *obj)
|
||||
* birth, and runtime clone of a block objects are never mutated.
|
||||
*/
|
||||
JS_ASSERT(STOBJ_GET_CLASS(obj) != &js_BlockClass);
|
||||
newscope = js_NewScope(cx, 0, scope->map.ops, LOCKED_OBJ_GET_CLASS(obj),
|
||||
obj);
|
||||
newscope = js_NewScope(cx, scope->map.ops, LOCKED_OBJ_GET_CLASS(obj), obj);
|
||||
if (!newscope)
|
||||
return NULL;
|
||||
JS_LOCK_SCOPE(cx, newscope);
|
||||
obj->map = js_HoldObjectMap(cx, &newscope->map);
|
||||
JS_ASSERT(newscope->map.freeslot == JSSLOT_FREE(STOBJ_GET_CLASS(obj)));
|
||||
obj->map = &newscope->map;
|
||||
|
||||
JS_ASSERT(newscope->freeslot == JSSLOT_FREE(STOBJ_GET_CLASS(obj)));
|
||||
clasp = STOBJ_GET_CLASS(obj);
|
||||
if (clasp->reserveSlots) {
|
||||
freeslot = JSSLOT_FREE(clasp) + clasp->reserveSlots(cx, obj);
|
||||
if (freeslot > STOBJ_NSLOTS(obj))
|
||||
freeslot = STOBJ_NSLOTS(obj);
|
||||
if (newscope->map.freeslot < freeslot)
|
||||
newscope->map.freeslot = freeslot;
|
||||
if (newscope->freeslot < freeslot)
|
||||
newscope->freeslot = freeslot;
|
||||
}
|
||||
scope = (JSScope *) js_DropObjectMap(cx, &scope->map, obj);
|
||||
JS_TRANSFER_SCOPE_LOCK(cx, scope, newscope);
|
||||
js_DropScope(cx, scope, obj);
|
||||
return newscope;
|
||||
}
|
||||
|
||||
@ -160,17 +160,19 @@ CreateScopeTable(JSContext *cx, JSScope *scope, JSBool report)
|
||||
}
|
||||
|
||||
JSScope *
|
||||
js_NewScope(JSContext *cx, jsrefcount nrefs, JSObjectOps *ops, JSClass *clasp,
|
||||
JSObject *obj)
|
||||
js_NewScope(JSContext *cx, JSObjectOps *ops, JSClass *clasp, JSObject *obj)
|
||||
{
|
||||
JSScope *scope;
|
||||
JS_ASSERT(OPS_IS_NATIVE(ops));
|
||||
JS_ASSERT(obj);
|
||||
|
||||
scope = (JSScope *) JS_malloc(cx, sizeof(JSScope));
|
||||
JSScope *scope = (JSScope *) JS_malloc(cx, sizeof(JSScope));
|
||||
if (!scope)
|
||||
return NULL;
|
||||
|
||||
js_InitObjectMap(&scope->map, nrefs, ops, clasp);
|
||||
scope->map.ops = ops;
|
||||
scope->object = obj;
|
||||
scope->nrefs = 1;
|
||||
scope->freeslot = JSSLOT_FREE(clasp);
|
||||
scope->flags = 0;
|
||||
InitMinimalScope(cx, scope);
|
||||
|
||||
@ -203,6 +205,28 @@ js_DestroyScope(JSContext *cx, JSScope *scope)
|
||||
JS_free(cx, scope);
|
||||
}
|
||||
|
||||
void
|
||||
js_HoldScope(JSScope *scope)
|
||||
{
|
||||
JS_ASSERT(scope->nrefs >= 0);
|
||||
JS_ATOMIC_INCREMENT(&scope->nrefs);
|
||||
}
|
||||
|
||||
JSBool
|
||||
js_DropScope(JSContext *cx, JSScope *scope, JSObject *obj)
|
||||
{
|
||||
JS_ASSERT(scope->nrefs > 0);
|
||||
JS_ATOMIC_DECREMENT(&scope->nrefs);
|
||||
|
||||
if (scope->nrefs == 0) {
|
||||
js_DestroyScope(cx, scope);
|
||||
return false;
|
||||
}
|
||||
if (scope->object == obj)
|
||||
scope->object = NULL;
|
||||
return true;
|
||||
}
|
||||
|
||||
#ifdef JS_DUMP_PROPTREE_STATS
|
||||
typedef struct JSScopeStats {
|
||||
jsrefcount searches;
|
||||
|
@ -201,6 +201,8 @@ struct JSScope {
|
||||
JSTitle title; /* lock state */
|
||||
#endif
|
||||
JSObject *object; /* object that owns this scope */
|
||||
jsrefcount nrefs; /* count of all referencing objects */
|
||||
uint32 freeslot; /* index of next free slot in object */
|
||||
uint32 shape; /* property cache shape identifier */
|
||||
uint8 flags; /* flags, see below */
|
||||
int8 hashShift; /* multiplicative hash shift */
|
||||
@ -213,7 +215,8 @@ struct JSScope {
|
||||
|
||||
#define JS_IS_SCOPE_LOCKED(cx, scope) JS_IS_TITLE_LOCKED(cx, &(scope)->title)
|
||||
|
||||
#define OBJ_SCOPE(obj) ((JSScope *)(obj)->map)
|
||||
#define OBJ_SCOPE(obj) (JS_ASSERT(OBJ_IS_NATIVE(obj)), \
|
||||
(JSScope *) (obj)->map)
|
||||
#define OBJ_SHAPE(obj) (OBJ_SCOPE(obj)->shape)
|
||||
|
||||
/* By definition, hashShift = JS_DHASH_BITS - log2(capacity). */
|
||||
@ -329,7 +332,7 @@ struct JSScopeProperty {
|
||||
|
||||
#define SPROP_INVALID_SLOT 0xffffffff
|
||||
|
||||
#define SLOT_IN_SCOPE(slot,scope) ((slot) < (scope)->map.freeslot)
|
||||
#define SLOT_IN_SCOPE(slot,scope) ((slot) < (scope)->freeslot)
|
||||
#define SPROP_HAS_VALID_SLOT(sprop,scope) SLOT_IN_SCOPE((sprop)->slot, scope)
|
||||
|
||||
#define SPROP_HAS_STUB_GETTER(sprop) (!(sprop)->getter)
|
||||
@ -396,12 +399,17 @@ extern JSScope *
|
||||
js_GetMutableScope(JSContext *cx, JSObject *obj);
|
||||
|
||||
extern JSScope *
|
||||
js_NewScope(JSContext *cx, jsrefcount nrefs, JSObjectOps *ops, JSClass *clasp,
|
||||
JSObject *obj);
|
||||
js_NewScope(JSContext *cx, JSObjectOps *ops, JSClass *clasp, JSObject *obj);
|
||||
|
||||
extern void
|
||||
js_DestroyScope(JSContext *cx, JSScope *scope);
|
||||
|
||||
extern void
|
||||
js_HoldScope(JSScope *scope);
|
||||
|
||||
extern JSBool
|
||||
js_DropScope(JSContext *cx, JSScope *scope, JSObject *obj);
|
||||
|
||||
extern JS_FRIEND_API(JSScopeProperty **)
|
||||
js_SearchScope(JSScope *scope, jsid id, JSBool adding);
|
||||
|
||||
|
@ -6301,21 +6301,25 @@ TraceRecorder::binary(LOpcode op)
|
||||
return JSRS_STOP;
|
||||
}
|
||||
|
||||
JS_STATIC_ASSERT(offsetof(JSObjectOps, newObjectMap) == 0);
|
||||
JS_STATIC_ASSERT(offsetof(JSObjectOps, objectMap) == 0);
|
||||
|
||||
bool
|
||||
TraceRecorder::map_is_native(JSObjectMap* map, LIns* map_ins, LIns*& ops_ins, size_t op_offset)
|
||||
{
|
||||
#define OP(ops) (*(JSObjectOp*) ((char*)(ops) + op_offset))
|
||||
if (OP(map->ops) != OP(&js_ObjectOps))
|
||||
return false;
|
||||
JS_ASSERT(op_offset < sizeof(JSObjectOps));
|
||||
JS_ASSERT(op_offset % sizeof(void *) == 0);
|
||||
|
||||
ops_ins = addName(lir->insLoad(LIR_ldp, map_ins, offsetof(JSObjectMap, ops)), "ops");
|
||||
#define OP(ops) (*(void **) ((uint8 *) (ops) + op_offset))
|
||||
void* ptr = OP(map->ops);
|
||||
if (ptr != OP(&js_ObjectOps))
|
||||
return false;
|
||||
#undef OP
|
||||
|
||||
ops_ins = addName(lir->insLoad(LIR_ldp, map_ins, int(offsetof(JSObjectMap, ops))), "ops");
|
||||
LIns* n = lir->insLoad(LIR_ldp, ops_ins, op_offset);
|
||||
guard(true,
|
||||
addName(lir->ins2(LIR_eq, n, INS_CONSTFUNPTR(OP(&js_ObjectOps))), "guard(native-map)"),
|
||||
addName(lir->ins2(LIR_eq, n, INS_CONSTPTR(ptr)), "guard(native-map)"),
|
||||
BRANCH_EXIT);
|
||||
#undef OP
|
||||
|
||||
return true;
|
||||
}
|
||||
@ -6340,10 +6344,9 @@ TraceRecorder::test_property_cache(JSObject* obj, LIns* obj_ins, JSObject*& obj2
|
||||
LIns* ops_ins;
|
||||
|
||||
// Interpreter calls to PROPERTY_CACHE_TEST guard on native object ops
|
||||
// (newObjectMap == js_ObjectOps.newObjectMap) which is required to use
|
||||
// native objects (those whose maps are scopes), or even more narrow
|
||||
// conditions required because the cache miss case will call a particular
|
||||
// object-op (js_GetProperty, js_SetProperty).
|
||||
// which is required to use native objects (those whose maps are scopes),
|
||||
// or even more narrow conditions required because the cache miss case
|
||||
// will call a particular object-op (js_GetProperty, js_SetProperty).
|
||||
//
|
||||
// We parameterize using offsetof and guard on match against the hook at
|
||||
// the given offset in js_ObjectOps. TraceRecorder::record_JSOP_SETPROP
|
||||
@ -6354,7 +6357,7 @@ TraceRecorder::test_property_cache(JSObject* obj, LIns* obj_ins, JSObject*& obj2
|
||||
// No need to guard native-ness of global object.
|
||||
JS_ASSERT(OBJ_IS_NATIVE(globalObj));
|
||||
if (aobj != globalObj) {
|
||||
size_t op_offset = offsetof(JSObjectOps, newObjectMap);
|
||||
size_t op_offset = offsetof(JSObjectOps, objectMap);
|
||||
if (mode == JOF_PROP || mode == JOF_VARPROP) {
|
||||
JS_ASSERT(!(format & JOF_SET));
|
||||
op_offset = offsetof(JSObjectOps, getProperty);
|
||||
|
@ -4912,10 +4912,10 @@ xml_trace_vector(JSTracer *trc, JSXML **vec, uint32 len)
|
||||
}
|
||||
|
||||
/*
|
||||
* js_XMLObjectOps.newObjectMap == js_NewObjectMap, so XML objects appear to
|
||||
* be native. Thus xml_lookupProperty must return a valid JSScopeProperty
|
||||
* pointer parameter via *propp to signify "property found". Since the only
|
||||
* call to xml_lookupProperty is via OBJ_LOOKUP_PROPERTY, and then only from
|
||||
* js_XMLObjectOps.newObjectMap is null, so XML objects appear to be native.
|
||||
* Thus xml_lookupProperty must return a valid JSScopeProperty pointer
|
||||
* parameter via *propp to signify "property found". Since the only call to
|
||||
* xml_lookupProperty is via OBJ_LOOKUP_PROPERTY, and then only from
|
||||
* js_FindProperty (in jsobj.c, called from jsinterp.c) or from JSOP_IN case
|
||||
* in the interpreter, the only time we add a JSScopeProperty here is when an
|
||||
* unqualified name is being accessed or when "name in xml" is called.
|
||||
@ -5428,9 +5428,9 @@ out:
|
||||
return ok;
|
||||
}
|
||||
|
||||
/* Use js_NewObjectMap so XML objects satisfy OBJ_IS_NATIVE tests. */
|
||||
/* Use NULL for objectMap so XML objects satisfy OBJ_IS_NATIVE tests. */
|
||||
JS_FRIEND_DATA(JSObjectOps) js_XMLObjectOps = {
|
||||
js_NewObjectMap, js_DestroyObjectMap,
|
||||
NULL,
|
||||
xml_lookupProperty, xml_defineProperty,
|
||||
xml_getProperty, xml_setProperty,
|
||||
xml_getAttributes, xml_setAttributes,
|
||||
|
@ -404,10 +404,14 @@ JavaArray_checkAccess(JSContext *cx, JSObject *obj, jsid id,
|
||||
}
|
||||
}
|
||||
|
||||
extern JSObjectOps JavaArray_ops;
|
||||
|
||||
static const JSObjectMap JavaArrayMap = { &JavaArray_ops };
|
||||
|
||||
JSObjectOps JavaArray_ops = {
|
||||
&JavaArrayMap, /* objectMap */
|
||||
|
||||
/* Mandatory non-null function pointer members. */
|
||||
jsj_wrapper_newObjectMap, /* newObjectMap */
|
||||
jsj_wrapper_destroyObjectMap, /* destroyObjectMap */
|
||||
JavaArray_lookupProperty,
|
||||
JavaArray_defineProperty,
|
||||
JavaArray_getPropertyById, /* getProperty */
|
||||
|
@ -529,10 +529,14 @@ done:
|
||||
return JS_TRUE;
|
||||
}
|
||||
|
||||
extern JSObjectOps JavaClass_ops;
|
||||
|
||||
static const JSObjectMap JavaClassMap = { &JavaClass_ops };
|
||||
|
||||
JSObjectOps JavaClass_ops = {
|
||||
&JavaClassMap, /* objectMap */
|
||||
|
||||
/* Mandatory non-null function pointer members. */
|
||||
jsj_wrapper_newObjectMap, /* newObjectMap */
|
||||
jsj_wrapper_destroyObjectMap, /* destroyObjectMap */
|
||||
JavaClass_lookupProperty,
|
||||
JavaClass_defineProperty,
|
||||
JavaClass_getPropertyById, /* getProperty */
|
||||
|
@ -999,32 +999,10 @@ JavaObject_checkAccess(JSContext *cx, JSObject *obj, jsid id,
|
||||
|
||||
#define JSJ_SLOT_COUNT (JSSLOT_PRIVATE+1)
|
||||
|
||||
JSObjectMap *
|
||||
jsj_wrapper_newObjectMap(JSContext *cx, jsrefcount nrefs, JSObjectOps *ops,
|
||||
JSClass *clasp, JSObject *obj)
|
||||
{
|
||||
JSObjectMap * map;
|
||||
|
||||
map = (JSObjectMap *) JS_malloc(cx, sizeof(JSObjectMap));
|
||||
if (map) {
|
||||
map->nrefs = nrefs;
|
||||
map->ops = ops;
|
||||
map->freeslot = JSJ_SLOT_COUNT;
|
||||
}
|
||||
return map;
|
||||
}
|
||||
|
||||
void
|
||||
jsj_wrapper_destroyObjectMap(JSContext *cx, JSObjectMap *map)
|
||||
{
|
||||
JS_free(cx, map);
|
||||
}
|
||||
|
||||
jsval
|
||||
jsj_wrapper_getRequiredSlot(JSContext *cx, JSObject *obj, uint32 slot)
|
||||
{
|
||||
JS_ASSERT(slot < JSJ_SLOT_COUNT);
|
||||
JS_ASSERT(obj->map->freeslot == JSJ_SLOT_COUNT);
|
||||
return STOBJ_GET_SLOT(obj, slot);
|
||||
}
|
||||
|
||||
@ -1032,15 +1010,18 @@ JSBool
|
||||
jsj_wrapper_setRequiredSlot(JSContext *cx, JSObject *obj, uint32 slot, jsval v)
|
||||
{
|
||||
JS_ASSERT(slot < JSJ_SLOT_COUNT);
|
||||
JS_ASSERT(obj->map->freeslot == JSJ_SLOT_COUNT);
|
||||
STOBJ_SET_SLOT(obj, slot, v);
|
||||
return JS_TRUE;
|
||||
}
|
||||
|
||||
extern JSObjectOps JavaObject_ops;
|
||||
|
||||
static const JSObjectMap JavaObjectMap = { &JavaObject_ops };
|
||||
|
||||
JSObjectOps JavaObject_ops = {
|
||||
&JavaObjectMap, /* objectMap */
|
||||
|
||||
/* Mandatory non-null function pointer members. */
|
||||
jsj_wrapper_newObjectMap, /* newObjectMap */
|
||||
jsj_wrapper_destroyObjectMap, /* destroyObjectMap */
|
||||
JavaObject_lookupProperty,
|
||||
JavaObject_defineProperty,
|
||||
JavaObject_getPropertyById, /* getProperty */
|
||||
|
@ -643,13 +643,6 @@ jsj_EnterJava(JSContext *cx, JNIEnv **envp);
|
||||
extern void
|
||||
jsj_ExitJava(JSJavaThreadState *jsj_env);
|
||||
|
||||
extern JSObjectMap *
|
||||
jsj_wrapper_newObjectMap(JSContext *cx, jsrefcount nrefs, JSObjectOps *ops,
|
||||
JSClass *clasp, JSObject *obj);
|
||||
|
||||
extern void
|
||||
jsj_wrapper_destroyObjectMap(JSContext *cx, JSObjectMap *map);
|
||||
|
||||
extern jsval
|
||||
jsj_wrapper_getRequiredSlot(JSContext *cx, JSObject *obj, uint32 slot);
|
||||
|
||||
|
@ -1399,7 +1399,7 @@ XPC_WN_GetObjectOpsWithCall(JSContext *cx, JSClass *clazz)
|
||||
|
||||
JSBool xpc_InitWrappedNativeJSOps()
|
||||
{
|
||||
if(!XPC_WN_NoCall_JSOps.newObjectMap)
|
||||
if(!XPC_WN_NoCall_JSOps.lookupProperty)
|
||||
{
|
||||
memcpy(&XPC_WN_NoCall_JSOps, &js_ObjectOps, sizeof(JSObjectOps));
|
||||
XPC_WN_NoCall_JSOps.enumerate = XPC_WN_JSOp_Enumerate;
|
||||
|
Loading…
Reference in New Issue
Block a user