LCOV - code coverage report
Current view: directory - js/src - jsfuninlines.h (source / functions) Found Hit Coverage
Test: app.info Lines: 132 109 82.6 %
Date: 2012-06-02 Functions: 32 28 87.5 %

       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          745185 : JSFunction::inStrictMode() const
      52                 : {
      53          745185 :     return script()->strictModeCode;
      54                 : }
      55                 : 
      56                 : inline JSObject *
      57        61998062 : JSFunction::environment() const
      58                 : {
      59        61998062 :     JS_ASSERT(isInterpreted());
      60        61998062 :     return u.i.env_;
      61                 : }
      62                 : 
      63                 : inline void
      64          888670 : JSFunction::setEnvironment(JSObject *obj)
      65                 : {
      66          888670 :     JS_ASSERT(isInterpreted());
      67          888670 :     *(js::HeapPtrObject *)&u.i.env_ = obj;
      68          888670 : }
      69                 : 
      70                 : inline void
      71         3584585 : JSFunction::initEnvironment(JSObject *obj)
      72                 : {
      73         3584585 :     JS_ASSERT(isInterpreted());
      74         3584585 :     ((js::HeapPtrObject *)&u.i.env_)->init(obj);
      75         3584585 : }
      76                 : 
      77                 : inline void
      78         3269244 : JSFunction::initializeExtended()
      79                 : {
      80         3269244 :     JS_ASSERT(isExtended());
      81                 : 
      82         3269244 :     JS_ASSERT(js::ArrayLength(toExtended()->extendedSlots) == 2);
      83         3269244 :     toExtended()->extendedSlots[0].init(js::UndefinedValue());
      84         3269244 :     toExtended()->extendedSlots[1].init(js::UndefinedValue());
      85         3269244 : }
      86                 : 
      87                 : inline bool
      88             285 : JSFunction::isClonedMethod() const
      89                 : {
      90             285 :     return joinable() && isExtended() && getExtendedSlot(METHOD_OBJECT_SLOT).isObject();
      91                 : }
      92                 : 
      93                 : inline JSAtom *
      94             321 : JSFunction::methodAtom() const
      95                 : {
      96             321 :     return (joinable() && isExtended() && getExtendedSlot(METHOD_PROPERTY_SLOT).isString())
      97               0 :            ? (JSAtom *) getExtendedSlot(METHOD_PROPERTY_SLOT).toString()
      98             321 :            : NULL;
      99                 : }
     100                 : 
     101                 : inline void
     102                 : JSFunction::setMethodAtom(JSAtom *atom)
     103                 : {
     104                 :     JS_ASSERT(joinable());
     105                 :     setExtendedSlot(METHOD_PROPERTY_SLOT, js::StringValue(atom));
     106                 : }
     107                 : 
     108                 : inline JSObject *
     109               0 : JSFunction::methodObj() const
     110                 : {
     111               0 :     JS_ASSERT(joinable());
     112               0 :     return isClonedMethod() ? &getExtendedSlot(METHOD_OBJECT_SLOT).toObject() : NULL;
     113                 : }
     114                 : 
     115                 : inline void
     116               0 : JSFunction::setMethodObj(JSObject& obj)
     117                 : {
     118               0 :     JS_ASSERT(joinable());
     119               0 :     setExtendedSlot(METHOD_OBJECT_SLOT, js::ObjectValue(obj));
     120               0 : }
     121                 : 
     122                 : inline void
     123         4979507 : JSFunction::setExtendedSlot(size_t which, const js::Value &val)
     124                 : {
     125         4979507 :     JS_ASSERT(which < js::ArrayLength(toExtended()->extendedSlots));
     126         4979507 :     toExtended()->extendedSlots[which] = val;
     127         4979507 : }
     128                 : 
     129                 : inline const js::Value &
     130        23122638 : JSFunction::getExtendedSlot(size_t which) const
     131                 : {
     132        23122638 :     JS_ASSERT(which < js::ArrayLength(toExtended()->extendedSlots));
     133        23122638 :     return toExtended()->extendedSlots[which];
     134                 : }
     135                 : 
     136                 : inline bool
     137         6836930 : JSFunction::hasFlatClosureUpvars() const
     138                 : {
     139         6836930 :     JS_ASSERT(isFlatClosure());
     140         6836930 :     return isExtended() && !getExtendedSlot(FLAT_CLOSURE_UPVARS_SLOT).isUndefined();
     141                 : }
     142                 : 
     143                 : inline js::HeapValue *
     144         3461546 : JSFunction::getFlatClosureUpvars() const
     145                 : {
     146         3461546 :     JS_ASSERT(hasFlatClosureUpvars());
     147         3461546 :     return (js::HeapValue *) getExtendedSlot(FLAT_CLOSURE_UPVARS_SLOT).toPrivate();
     148                 : }
     149                 : 
     150                 : inline void
     151          684577 : JSFunction::finalizeUpvars()
     152                 : {
     153                 :     /*
     154                 :      * Cloned function objects may be flat closures with upvars to free.
     155                 :      *
     156                 :      * We must not access JSScript here that is stored in JSFunction. The
     157                 :      * script can be finalized before the function or closure instances. So we
     158                 :      * just check if JSSLOT_FLAT_CLOSURE_UPVARS holds a private value encoded
     159                 :      * as a double. We must also ignore newborn closures that do not have the
     160                 :      * private pointer set.
     161                 :      *
     162                 :      * FIXME bug 648320 - allocate upvars on the GC heap to avoid doing it
     163                 :      * here explicitly.
     164                 :      */
     165          684577 :     if (hasFlatClosureUpvars()) {
     166          571456 :         js::HeapValue *upvars = getFlatClosureUpvars();
     167          571456 :         js::Foreground::free_(upvars);
     168                 :     }
     169          684577 : }
     170                 : 
     171                 : inline js::Value
     172          703190 : JSFunction::getFlatClosureUpvar(uint32_t i) const
     173                 : {
     174          703190 :     JS_ASSERT(hasFlatClosureUpvars());
     175          703190 :     JS_ASSERT(script()->bindings.countUpvars() == script()->upvars()->length);
     176          703190 :     JS_ASSERT(i < script()->bindings.countUpvars());
     177          703190 :     return getFlatClosureUpvars()[i];
     178                 : }
     179                 : 
     180                 : inline void
     181               0 : JSFunction::setFlatClosureUpvar(uint32_t i, const js::Value &v)
     182                 : {
     183               0 :     JS_ASSERT(isFlatClosure());
     184               0 :     JS_ASSERT(script()->bindings.countUpvars() == script()->upvars()->length);
     185               0 :     JS_ASSERT(i < script()->bindings.countUpvars());
     186               0 :     getFlatClosureUpvars()[i] = v;
     187               0 : }
     188                 : 
     189                 : inline void
     190          743992 : JSFunction::initFlatClosureUpvar(uint32_t i, const js::Value &v)
     191                 : {
     192          743992 :     JS_ASSERT(isFlatClosure());
     193          743992 :     JS_ASSERT(script()->bindings.countUpvars() == script()->upvars()->length);
     194          743992 :     JS_ASSERT(i < script()->bindings.countUpvars());
     195          743992 :     getFlatClosureUpvars()[i].init(v);
     196          743992 : }
     197                 : 
     198                 : /* static */ inline size_t
     199            2117 : JSFunction::getFlatClosureUpvarsOffset()
     200                 : {
     201            2117 :     return offsetof(js::FunctionExtended, extendedSlots[FLAT_CLOSURE_UPVARS_SLOT]);
     202                 : }
     203                 : 
     204                 : namespace js {
     205                 : 
     206                 : static JS_ALWAYS_INLINE bool
     207          796348 : IsFunctionObject(const js::Value &v)
     208                 : {
     209          796348 :     return v.isObject() && v.toObject().isFunction();
     210                 : }
     211                 : 
     212                 : static JS_ALWAYS_INLINE bool
     213        48529514 : IsFunctionObject(const js::Value &v, JSFunction **fun)
     214                 : {
     215        48529514 :     if (v.isObject() && v.toObject().isFunction()) {
     216        48402828 :         *fun = v.toObject().toFunction();
     217        48402828 :         return true;
     218                 :     }
     219          126686 :     return false;
     220                 : }
     221                 : 
     222                 : static JS_ALWAYS_INLINE bool
     223         4200517 : IsNativeFunction(const js::Value &v)
     224                 : {
     225                 :     JSFunction *fun;
     226         4200517 :     return IsFunctionObject(v, &fun) && fun->isNative();
     227                 : }
     228                 : 
     229                 : static JS_ALWAYS_INLINE bool
     230                 : IsNativeFunction(const js::Value &v, JSFunction **fun)
     231                 : {
     232                 :     return IsFunctionObject(v, fun) && (*fun)->isNative();
     233                 : }
     234                 : 
     235                 : static JS_ALWAYS_INLINE bool
     236          186014 : IsNativeFunction(const js::Value &v, JSNative native)
     237                 : {
     238                 :     JSFunction *fun;
     239          186014 :     return IsFunctionObject(v, &fun) && fun->maybeNative() == native;
     240                 : }
     241                 : 
     242                 : /*
     243                 :  * When we have an object of a builtin class, we don't quite know what its
     244                 :  * valueOf/toString methods are, since these methods may have been overwritten
     245                 :  * or shadowed. However, we can still do better than the general case by
     246                 :  * hard-coding the necessary properties for us to find the native we expect.
     247                 :  *
     248                 :  * TODO: a per-thread shape-based cache would be faster and simpler.
     249                 :  */
     250                 : static JS_ALWAYS_INLINE bool
     251          186032 : ClassMethodIsNative(JSContext *cx, JSObject *obj, Class *clasp, jsid methodid, JSNative native)
     252                 : {
     253          186032 :     JS_ASSERT(obj->getClass() == clasp);
     254                 : 
     255                 :     Value v;
     256          186032 :     if (!HasDataProperty(cx, obj, methodid, &v)) {
     257          186032 :         JSObject *proto = obj->getProto();
     258          186032 :         if (!proto || proto->getClass() != clasp || !HasDataProperty(cx, proto, methodid, &v))
     259              18 :             return false;
     260                 :     }
     261                 : 
     262          186014 :     return js::IsNativeFunction(v, native);
     263                 : }
     264                 : 
     265                 : extern JS_ALWAYS_INLINE bool
     266                 : SameTraceType(const Value &lhs, const Value &rhs)
     267                 : {
     268                 :     return SameType(lhs, rhs) &&
     269                 :            (lhs.isPrimitive() ||
     270                 :             lhs.toObject().isFunction() == rhs.toObject().isFunction());
     271                 : }
     272                 : 
     273                 : /* Valueified JS_IsConstructing. */
     274                 : static JS_ALWAYS_INLINE bool
     275          400258 : IsConstructing(const Value *vp)
     276                 : {
     277                 : #ifdef DEBUG
     278          400258 :     JSObject *callee = &JS_CALLEE(cx, vp).toObject();
     279          400258 :     if (callee->isFunction()) {
     280          400258 :         JSFunction *fun = callee->toFunction();
     281          400258 :         JS_ASSERT((fun->flags & JSFUN_CONSTRUCTOR) != 0);
     282                 :     } else {
     283               0 :         JS_ASSERT(callee->getClass()->construct != NULL);
     284                 :     }
     285                 : #endif
     286          400258 :     return vp[1].isMagic();
     287                 : }
     288                 : 
     289                 : inline bool
     290          367772 : IsConstructing(CallReceiver call)
     291                 : {
     292          367772 :     return IsConstructing(call.base());
     293                 : }
     294                 : 
     295                 : inline const char *
     296            2276 : GetFunctionNameBytes(JSContext *cx, JSFunction *fun, JSAutoByteString *bytes)
     297                 : {
     298            2276 :     if (fun->atom)
     299            2276 :         return bytes->encode(cx, fun->atom);
     300               0 :     return js_anonymous_str;
     301                 : }
     302                 : 
     303                 : extern JSFunctionSpec function_methods[];
     304                 : 
     305                 : extern JSBool
     306                 : Function(JSContext *cx, unsigned argc, Value *vp);
     307                 : 
     308                 : extern bool
     309                 : IsBuiltinFunctionConstructor(JSFunction *fun);
     310                 : 
     311                 : /*
     312                 :  * Preconditions: funobj->isInterpreted() && !funobj->isFunctionPrototype() &&
     313                 :  * !funobj->isBoundFunction(). This is sufficient to establish that funobj has
     314                 :  * a non-configurable non-method .prototype data property, thought it might not
     315                 :  * have been resolved yet, and its value could be anything.
     316                 :  *
     317                 :  * Return the shape of the .prototype property of funobj, resolving it if
     318                 :  * needed. On error, return NULL.
     319                 :  *
     320                 :  * This is not safe to call on trace because it defines properties, which can
     321                 :  * trigger lookups that could reenter.
     322                 :  */
     323                 : const Shape *
     324                 : LookupInterpretedFunctionPrototype(JSContext *cx, JSObject *funobj);
     325                 : 
     326                 : static inline JSObject *
     327        13783197 : SkipScopeParent(JSObject *parent)
     328                 : {
     329        13783197 :     if (!parent)
     330          176868 :         return NULL;
     331        29130492 :     while (parent->isScope())
     332         1917834 :         parent = &parent->asScope().enclosingScope();
     333        13606329 :     return parent;
     334                 : }
     335                 : 
     336                 : inline JSFunction *
     337         2380496 : CloneFunctionObject(JSContext *cx, JSFunction *fun, JSObject *parent,
     338                 :                     gc::AllocKind kind = JSFunction::FinalizeKind)
     339                 : {
     340         2380496 :     JS_ASSERT(parent);
     341         2380496 :     JSObject *proto = parent->global().getOrCreateFunctionPrototype(cx);
     342         2380496 :     if (!proto)
     343               0 :         return NULL;
     344                 : 
     345         2380496 :     return js_CloneFunctionObject(cx, fun, parent, proto, kind);
     346                 : }
     347                 : 
     348                 : inline JSFunction *
     349         1828974 : CloneFunctionObjectIfNotSingleton(JSContext *cx, JSFunction *fun, JSObject *parent)
     350                 : {
     351                 :     /*
     352                 :      * For attempts to clone functions at a function definition opcode or from
     353                 :      * a method barrier, don't perform the clone if the function has singleton
     354                 :      * type. This was called pessimistically, and we need to preserve the
     355                 :      * type's property that if it is singleton there is only a single object
     356                 :      * with its type in existence.
     357                 :      */
     358         1828974 :     if (fun->hasSingletonType()) {
     359           23102 :         if (!fun->setParent(cx, SkipScopeParent(parent)))
     360               0 :             return NULL;
     361           23102 :         fun->setEnvironment(parent);
     362           23102 :         return fun;
     363                 :     }
     364                 : 
     365         1805872 :     return CloneFunctionObject(cx, fun, parent);
     366                 : }
     367                 : 
     368                 : inline JSFunction *
     369               0 : CloneFunctionObject(JSContext *cx, JSFunction *fun)
     370                 : {
     371                 :     /*
     372                 :      * Variant which makes an exact clone of fun, preserving parent and proto.
     373                 :      * Calling the above version CloneFunctionObject(cx, fun, fun->getParent())
     374                 :      * is not equivalent: API clients, including XPConnect, can reparent
     375                 :      * objects so that fun->global() != fun->getProto()->global().
     376                 :      * See ReparentWrapperIfFound.
     377                 :      */
     378               0 :     JS_ASSERT(fun->getParent() && fun->getProto());
     379                 : 
     380               0 :     if (fun->hasSingletonType())
     381               0 :         return fun;
     382                 : 
     383                 :     return js_CloneFunctionObject(cx, fun, fun->environment(), fun->getProto(),
     384               0 :                                   JSFunction::ExtendedFinalizeKind);
     385                 : }
     386                 : 
     387                 : } /* namespace js */
     388                 : 
     389                 : inline void
     390         1164884 : JSFunction::setScript(JSScript *script_)
     391                 : {
     392         1164884 :     JS_ASSERT(isInterpreted());
     393         1164884 :     script() = script_;
     394         1164884 : }
     395                 : 
     396                 : inline void
     397         2419133 : JSFunction::initScript(JSScript *script_)
     398                 : {
     399         2419133 :     JS_ASSERT(isInterpreted());
     400         2419133 :     script().init(script_);
     401         2419133 : }
     402                 : 
     403                 : #endif /* jsfuninlines_h___ */

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