LCOV - app.info - js/src/jsfuninlines.h

LCOV - code coverage report
| Current view: | directory - js/src - jsfuninlines.h (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 84 | 80 | 95.2 %
| Date: | 2012-04-07 | Functions: | 20 | 20 | 100.0 %

           1                 : /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
           2                 :  * vim: set ts=8 sw=4 et tw=99:
           3                 :  *
           4                 :  * ***** BEGIN LICENSE BLOCK *****
           5                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
           6                 :  *
           7                 :  * The contents of this file are subject to the Mozilla Public License Version
           8                 :  * 1.1 (the "License"); you may not use this file except in compliance with
           9                 :  * the License. You may obtain a copy of the License at
          10                 :  * http://www.mozilla.org/MPL/
          11                 :  *
          12                 :  * Software distributed under the License is distributed on an "AS IS" basis,
          13                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
          14                 :  * for the specific language governing rights and limitations under the
          15                 :  * License.
          16                 :  *
          17                 :  * The Original Code is SpiderMonkey.
          18                 :  *
          19                 :  * The Initial Developer of the Original Code is
          20                 :  * the Mozilla Foundation.
          21                 :  * Portions created by the Initial Developer are Copyright (C) 2010
          22                 :  * the Initial Developer. All Rights Reserved.
          23                 :  *
          24                 :  * Contributor(s):
          25                 :  *
          26                 :  * Alternatively, the contents of this file may be used under the terms of
          27                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
          28                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
          29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
          30                 :  * of those above. If you wish to allow use of your version of this file only
          31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
          32                 :  * use your version of this file under the terms of the MPL, indicate your
          33                 :  * decision by deleting the provisions above and replace them with the notice
          34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
          35                 :  * the provisions above, a recipient may use your version of this file under
          36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
          37                 :  *
          38                 :  * ***** END LICENSE BLOCK ***** */
          39                 :
          40                 : #ifndef jsfuninlines_h___
          41                 : #define jsfuninlines_h___
          42                 :
          43                 : #include "jsfun.h"
          44                 : #include "jsscript.h"
          45                 :
          46                 : #include "vm/GlobalObject.h"
          47                 :
          48                 : #include "vm/ScopeObject-inl.h"
          49                 :
          50                 : inline bool
          51          484970 : JSFunction::inStrictMode() const
          52                 : {
          53          484970 :     return script()->strictModeCode;
          54                 : }
          55                 :
          56                 : inline JSObject *
          57        46738238 : JSFunction::environment() const
          58                 : {
          59        46738238 :     JS_ASSERT(isInterpreted());
          60        46738238 :     return u.i.env_;
          61                 : }
          62                 :
          63                 : inline void
          64           26282 : JSFunction::setEnvironment(JSObject *obj)
          65                 : {
          66           26282 :     JS_ASSERT(isInterpreted());
          67           26282 :     *(js::HeapPtrObject *)&u.i.env_ = obj;
          68           26282 : }
          69                 :
          70                 : inline void
          71         1162560 : JSFunction::initEnvironment(JSObject *obj)
          72                 : {
          73         1162560 :     JS_ASSERT(isInterpreted());
          74         1162560 :     ((js::HeapPtrObject *)&u.i.env_)->init(obj);
          75         1162560 : }
          76                 :
          77                 : inline void
          78          623184 : JSFunction::initializeExtended()
          79                 : {
          80          623184 :     JS_ASSERT(isExtended());
          81                 :
          82          623184 :     JS_ASSERT(js::ArrayLength(toExtended()->extendedSlots) == 2);
          83          623184 :     toExtended()->extendedSlots[0].init(js::UndefinedValue());
          84          623184 :     toExtended()->extendedSlots[1].init(js::UndefinedValue());
          85          623184 : }
          86                 :
          87                 : inline void
          88          623184 : JSFunction::setExtendedSlot(size_t which, const js::Value &val)
          89                 : {
          90          623184 :     JS_ASSERT(which < js::ArrayLength(toExtended()->extendedSlots));
          91          623184 :     toExtended()->extendedSlots[which] = val;
          92          623184 : }
          93                 :
          94                 : inline const js::Value &
          95            5253 : JSFunction::getExtendedSlot(size_t which) const
          96                 : {
          97            5253 :     JS_ASSERT(which < js::ArrayLength(toExtended()->extendedSlots));
          98            5253 :     return toExtended()->extendedSlots[which];
          99                 : }
         100                 :
         101                 : namespace js {
         102                 :
         103                 : static JS_ALWAYS_INLINE bool
         104          736700 : IsFunctionObject(const js::Value &v)
         105                 : {
         106          736700 :     return v.isObject() && v.toObject().isFunction();
         107                 : }
         108                 :
         109                 : static JS_ALWAYS_INLINE bool
         110        39149406 : IsFunctionObject(const js::Value &v, JSFunction **fun)
         111                 : {
         112        39149406 :     if (v.isObject() && v.toObject().isFunction()) {
         113        39107483 :         *fun = v.toObject().toFunction();
         114        39107483 :         return true;
         115                 :     }
         116           41923 :     return false;
         117                 : }
         118                 :
         119                 : static JS_ALWAYS_INLINE bool
         120         5610111 : IsNativeFunction(const js::Value &v)
         121                 : {
         122                 :     JSFunction *fun;
         123         5610111 :     return IsFunctionObject(v, &fun) && fun->isNative();
         124                 : }
         125                 :
         126                 : static JS_ALWAYS_INLINE bool
         127                 : IsNativeFunction(const js::Value &v, JSFunction **fun)
         128                 : {
         129                 :     return IsFunctionObject(v, fun) && (*fun)->isNative();
         130                 : }
         131                 :
         132                 : static JS_ALWAYS_INLINE bool
         133          328683 : IsNativeFunction(const js::Value &v, JSNative native)
         134                 : {
         135                 :     JSFunction *fun;
         136          328683 :     return IsFunctionObject(v, &fun) && fun->maybeNative() == native;
         137                 : }
         138                 :
         139                 : /*
         140                 :  * When we have an object of a builtin class, we don't quite know what its
         141                 :  * valueOf/toString methods are, since these methods may have been overwritten
         142                 :  * or shadowed. However, we can still do better than the general case by
         143                 :  * hard-coding the necessary properties for us to find the native we expect.
         144                 :  *
         145                 :  * TODO: a per-thread shape-based cache would be faster and simpler.
         146                 :  */
         147                 : static JS_ALWAYS_INLINE bool
         148          184635 : ClassMethodIsNative(JSContext *cx, JSObject *obj, Class *clasp, jsid methodid, JSNative native)
         149                 : {
         150          184635 :     JS_ASSERT(obj->getClass() == clasp);
         151                 :
         152                 :     Value v;
         153          184635 :     if (!HasDataProperty(cx, obj, methodid, &v)) {
         154          184635 :         JSObject *proto = obj->getProto();
         155          184635 :         if (!proto || proto->getClass() != clasp || !HasDataProperty(cx, proto, methodid, &v))
         156              18 :             return false;
         157                 :     }
         158                 :
         159          184617 :     return js::IsNativeFunction(v, native);
         160                 : }
         161                 :
         162                 : extern JS_ALWAYS_INLINE bool
         163                 : SameTraceType(const Value &lhs, const Value &rhs)
         164                 : {
         165                 :     return SameType(lhs, rhs) &&
         166                 :            (lhs.isPrimitive() ||
         167                 :             lhs.toObject().isFunction() == rhs.toObject().isFunction());
         168                 : }
         169                 :
         170                 : /* Valueified JS_IsConstructing. */
         171                 : static JS_ALWAYS_INLINE bool
         172          378531 : IsConstructing(const Value *vp)
         173                 : {
         174                 : #ifdef DEBUG
         175          378531 :     JSObject *callee = &JS_CALLEE(cx, vp).toObject();
         176          378531 :     if (callee->isFunction()) {
         177          378531 :         JSFunction *fun = callee->toFunction();
         178          378531 :         JS_ASSERT((fun->flags & JSFUN_CONSTRUCTOR) != 0);
         179                 :     } else {
         180               0 :         JS_ASSERT(callee->getClass()->construct != NULL);
         181                 :     }
         182                 : #endif
         183          378531 :     return vp[1].isMagic();
         184                 : }
         185                 :
         186                 : inline bool
         187          360508 : IsConstructing(CallReceiver call)
         188                 : {
         189          360508 :     return IsConstructing(call.base());
         190                 : }
         191                 :
         192                 : inline const char *
         193            2276 : GetFunctionNameBytes(JSContext *cx, JSFunction *fun, JSAutoByteString *bytes)
         194                 : {
         195            2276 :     if (fun->atom)
         196            2276 :         return bytes->encode(cx, fun->atom);
         197               0 :     return js_anonymous_str;
         198                 : }
         199                 :
         200                 : extern JSFunctionSpec function_methods[];
         201                 :
         202                 : extern JSBool
         203                 : Function(JSContext *cx, unsigned argc, Value *vp);
         204                 :
         205                 : extern bool
         206                 : IsBuiltinFunctionConstructor(JSFunction *fun);
         207                 :
         208                 : /*
         209                 :  * Preconditions: funobj->isInterpreted() && !funobj->isFunctionPrototype() &&
         210                 :  * !funobj->isBoundFunction(). This is sufficient to establish that funobj has
         211                 :  * a non-configurable non-method .prototype data property, thought it might not
         212                 :  * have been resolved yet, and its value could be anything.
         213                 :  *
         214                 :  * Return the shape of the .prototype property of funobj, resolving it if
         215                 :  * needed. On error, return NULL.
         216                 :  *
         217                 :  * This is not safe to call on trace because it defines properties, which can
         218                 :  * trigger lookups that could reenter.
         219                 :  */
         220                 : const Shape *
         221                 : LookupInterpretedFunctionPrototype(JSContext *cx, JSObject *funobj);
         222                 :
         223                 : static inline JSObject *
         224         7999268 : SkipScopeParent(JSObject *parent)
         225                 : {
         226         7999268 :     if (!parent)
         227            2923 :         return NULL;
         228        17388249 :     while (parent->isScope())
         229         1395559 :         parent = &parent->asScope().enclosingScope();
         230         7996345 :     return parent;
         231                 : }
         232                 :
         233                 : inline JSFunction *
         234          971430 : CloneFunctionObject(JSContext *cx, JSFunction *fun, JSObject *parent,
         235                 :                     gc::AllocKind kind = JSFunction::FinalizeKind)
         236                 : {
         237          971430 :     JS_ASSERT(parent);
         238          971430 :     JSObject *proto = parent->global().getOrCreateFunctionPrototype(cx);
         239          971430 :     if (!proto)
         240               0 :         return NULL;
         241                 :
         242          971430 :     return js_CloneFunctionObject(cx, fun, parent, proto, kind);
         243                 : }
         244                 :
         245                 : inline JSFunction *
         246          992506 : CloneFunctionObjectIfNotSingleton(JSContext *cx, JSFunction *fun, JSObject *parent)
         247                 : {
         248                 :     /*
         249                 :      * For attempts to clone functions at a function definition opcode,
         250                 :      * don't perform the clone if the function has singleton type. This
         251                 :      * was called pessimistically, and we need to preserve the type's
         252                 :      * property that if it is singleton there is only a single object
         253                 :      * with its type in existence.
         254                 :      */
         255          992506 :     if (fun->hasSingletonType()) {
         256           23445 :         if (!fun->setParent(cx, SkipScopeParent(parent)))
         257               0 :             return NULL;
         258           23445 :         fun->setEnvironment(parent);
         259           23445 :         return fun;
         260                 :     }
         261                 :
         262          969061 :     return CloneFunctionObject(cx, fun, parent);
         263                 : }
         264                 :
         265                 : inline JSFunction *
         266                 : CloneFunctionObject(JSContext *cx, JSFunction *fun)
         267                 : {
         268                 :     /*
         269                 :      * Variant which makes an exact clone of fun, preserving parent and proto.
         270                 :      * Calling the above version CloneFunctionObject(cx, fun, fun->getParent())
         271                 :      * is not equivalent: API clients, including XPConnect, can reparent
         272                 :      * objects so that fun->global() != fun->getProto()->global().
         273                 :      * See ReparentWrapperIfFound.
         274                 :      */
         275                 :     JS_ASSERT(fun->getParent() && fun->getProto());
         276                 :
         277                 :     if (fun->hasSingletonType())
         278                 :         return fun;
         279                 :
         280                 :     return js_CloneFunctionObject(cx, fun, fun->environment(), fun->getProto(),
         281                 :                                   JSFunction::ExtendedFinalizeKind);
         282                 : }
         283                 :
         284                 : } /* namespace js */
         285                 :
         286                 : inline void
         287          166822 : JSFunction::setScript(JSScript *script_)
         288                 : {
         289          166822 :     JS_ASSERT(isInterpreted());
         290          166822 :     script() = script_;
         291          166822 : }
         292                 :
         293                 : inline void
         294          995171 : JSFunction::initScript(JSScript *script_)
         295                 : {
         296          995171 :     JS_ASSERT(isInterpreted());
         297          995171 :     script().init(script_);
         298          995171 : }
         299                 :
         300                 : #endif /* jsfuninlines_h___ */

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