LCOV - code coverage report
Current view: directory - js/src - jsfuninlines.h (source / functions) Found Hit Coverage
Test: app.info Lines: 140 130 92.9 %
Date: 2012-04-21 Functions: 34 33 97.1 %

       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          745207 : JSFunction::inStrictMode() const
      52                 : {
      53          745207 :     return script()->strictModeCode;
      54                 : }
      55                 : 
      56                 : inline JSObject *
      57        62210205 : JSFunction::environment() const
      58                 : {
      59        62210205 :     JS_ASSERT(isInterpreted());
      60        62210205 :     return u.i.env_;
      61                 : }
      62                 : 
      63                 : inline void
      64          884936 : JSFunction::setEnvironment(JSObject *obj)
      65                 : {
      66          884936 :     JS_ASSERT(isInterpreted());
      67          884936 :     *(js::HeapPtrObject *)&u.i.env_ = obj;
      68          884936 : }
      69                 : 
      70                 : inline void
      71         3617600 : JSFunction::initEnvironment(JSObject *obj)
      72                 : {
      73         3617600 :     JS_ASSERT(isInterpreted());
      74         3617600 :     ((js::HeapPtrObject *)&u.i.env_)->init(obj);
      75         3617600 : }
      76                 : 
      77                 : inline void
      78         3279310 : JSFunction::initializeExtended()
      79                 : {
      80         3279310 :     JS_ASSERT(isExtended());
      81                 : 
      82         3279310 :     JS_ASSERT(js::ArrayLength(toExtended()->extendedSlots) == 2);
      83         3279310 :     toExtended()->extendedSlots[0].init(js::UndefinedValue());
      84         3279310 :     toExtended()->extendedSlots[1].init(js::UndefinedValue());
      85         3279310 : }
      86                 : 
      87                 : inline void
      88           98477 : JSFunction::setJoinable()
      89                 : {
      90           98477 :     JS_ASSERT(isInterpreted());
      91           98477 :     flags |= JSFUN_JOINABLE;
      92           98477 : }
      93                 : 
      94                 : inline bool
      95           27892 : JSFunction::isClonedMethod() const
      96                 : {
      97           27892 :     return joinable() && isExtended() && getExtendedSlot(METHOD_OBJECT_SLOT).isObject();
      98                 : }
      99                 : 
     100                 : inline JSAtom *
     101           19564 : JSFunction::methodAtom() const
     102                 : {
     103           58257 :     return (joinable() && isExtended() && getExtendedSlot(METHOD_PROPERTY_SLOT).isString())
     104           19248 :            ? (JSAtom *) getExtendedSlot(METHOD_PROPERTY_SLOT).toString()
     105           77505 :            : NULL;
     106                 : }
     107                 : 
     108                 : inline void
     109            7096 : JSFunction::setMethodAtom(JSAtom *atom)
     110                 : {
     111            7096 :     JS_ASSERT(joinable());
     112            7096 :     setExtendedSlot(METHOD_PROPERTY_SLOT, js::StringValue(atom));
     113            7096 : }
     114                 : 
     115                 : inline JSObject *
     116               5 : JSFunction::methodObj() const
     117                 : {
     118               5 :     JS_ASSERT(joinable());
     119               5 :     return isClonedMethod() ? &getExtendedSlot(METHOD_OBJECT_SLOT).toObject() : NULL;
     120                 : }
     121                 : 
     122                 : inline void
     123            2285 : JSFunction::setMethodObj(JSObject& obj)
     124                 : {
     125            2285 :     JS_ASSERT(joinable());
     126            2285 :     setExtendedSlot(METHOD_OBJECT_SLOT, js::ObjectValue(obj));
     127            2285 : }
     128                 : 
     129                 : inline void
     130         4964643 : JSFunction::setExtendedSlot(size_t which, const js::Value &val)
     131                 : {
     132         4964643 :     JS_ASSERT(which < js::ArrayLength(toExtended()->extendedSlots));
     133         4964643 :     toExtended()->extendedSlots[which] = val;
     134         4964643 : }
     135                 : 
     136                 : inline const js::Value &
     137        24584410 : JSFunction::getExtendedSlot(size_t which) const
     138                 : {
     139        24584410 :     JS_ASSERT(which < js::ArrayLength(toExtended()->extendedSlots));
     140        24584410 :     return toExtended()->extendedSlots[which];
     141                 : }
     142                 : 
     143                 : inline bool
     144         6939240 : JSFunction::hasFlatClosureUpvars() const
     145                 : {
     146         6939240 :     JS_ASSERT(isFlatClosure());
     147         6939240 :     return isExtended() && !getExtendedSlot(FLAT_CLOSURE_UPVARS_SLOT).isUndefined();
     148                 : }
     149                 : 
     150                 : inline js::HeapValue *
     151         3521522 : JSFunction::getFlatClosureUpvars() const
     152                 : {
     153         3521522 :     JS_ASSERT(hasFlatClosureUpvars());
     154         3521522 :     return (js::HeapValue *) getExtendedSlot(FLAT_CLOSURE_UPVARS_SLOT).toPrivate();
     155                 : }
     156                 : 
     157                 : inline void
     158          706008 : JSFunction::finalizeUpvars()
     159                 : {
     160                 :     /*
     161                 :      * Cloned function objects may be flat closures with upvars to free.
     162                 :      *
     163                 :      * We must not access JSScript here that is stored in JSFunction. The
     164                 :      * script can be finalized before the function or closure instances. So we
     165                 :      * just check if JSSLOT_FLAT_CLOSURE_UPVARS holds a private value encoded
     166                 :      * as a double. We must also ignore newborn closures that do not have the
     167                 :      * private pointer set.
     168                 :      *
     169                 :      * FIXME bug 648320 - allocate upvars on the GC heap to avoid doing it
     170                 :      * here explicitly.
     171                 :      */
     172          706008 :     if (hasFlatClosureUpvars()) {
     173          592987 :         js::HeapValue *upvars = getFlatClosureUpvars();
     174          592987 :         js::Foreground::free_(upvars);
     175                 :     }
     176          706008 : }
     177                 : 
     178                 : inline js::Value
     179          718807 : JSFunction::getFlatClosureUpvar(uint32_t i) const
     180                 : {
     181          718807 :     JS_ASSERT(hasFlatClosureUpvars());
     182          718807 :     JS_ASSERT(script()->bindings.countUpvars() == script()->upvars()->length);
     183          718807 :     JS_ASSERT(i < script()->bindings.countUpvars());
     184          718807 :     return getFlatClosureUpvars()[i];
     185                 : }
     186                 : 
     187                 : inline void
     188               0 : JSFunction::setFlatClosureUpvar(uint32_t i, const js::Value &v)
     189                 : {
     190               0 :     JS_ASSERT(isFlatClosure());
     191               0 :     JS_ASSERT(script()->bindings.countUpvars() == script()->upvars()->length);
     192               0 :     JS_ASSERT(i < script()->bindings.countUpvars());
     193               0 :     getFlatClosureUpvars()[i] = v;
     194               0 : }
     195                 : 
     196                 : inline void
     197          765453 : JSFunction::initFlatClosureUpvar(uint32_t i, const js::Value &v)
     198                 : {
     199          765453 :     JS_ASSERT(isFlatClosure());
     200          765453 :     JS_ASSERT(script()->bindings.countUpvars() == script()->upvars()->length);
     201          765453 :     JS_ASSERT(i < script()->bindings.countUpvars());
     202          765453 :     getFlatClosureUpvars()[i].init(v);
     203          765453 : }
     204                 : 
     205                 : /* static */ inline size_t
     206            2117 : JSFunction::getFlatClosureUpvarsOffset()
     207                 : {
     208            2117 :     return offsetof(js::FunctionExtended, extendedSlots[FLAT_CLOSURE_UPVARS_SLOT]);
     209                 : }
     210                 : 
     211                 : namespace js {
     212                 : 
     213                 : static JS_ALWAYS_INLINE bool
     214          822263 : IsFunctionObject(const js::Value &v)
     215                 : {
     216          822263 :     return v.isObject() && v.toObject().isFunction();
     217                 : }
     218                 : 
     219                 : static JS_ALWAYS_INLINE bool
     220        49193798 : IsFunctionObject(const js::Value &v, JSFunction **fun)
     221                 : {
     222        49193798 :     if (v.isObject() && v.toObject().isFunction()) {
     223        49067215 :         *fun = v.toObject().toFunction();
     224        49067215 :         return true;
     225                 :     }
     226          126583 :     return false;
     227                 : }
     228                 : 
     229                 : static JS_ALWAYS_INLINE bool
     230         4200733 : IsNativeFunction(const js::Value &v)
     231                 : {
     232                 :     JSFunction *fun;
     233         4200733 :     return IsFunctionObject(v, &fun) && fun->isNative();
     234                 : }
     235                 : 
     236                 : static JS_ALWAYS_INLINE bool
     237                 : IsNativeFunction(const js::Value &v, JSFunction **fun)
     238                 : {
     239                 :     return IsFunctionObject(v, fun) && (*fun)->isNative();
     240                 : }
     241                 : 
     242                 : static JS_ALWAYS_INLINE bool
     243          186014 : IsNativeFunction(const js::Value &v, JSNative native)
     244                 : {
     245                 :     JSFunction *fun;
     246          186014 :     return IsFunctionObject(v, &fun) && fun->maybeNative() == native;
     247                 : }
     248                 : 
     249                 : /*
     250                 :  * When we have an object of a builtin class, we don't quite know what its
     251                 :  * valueOf/toString methods are, since these methods may have been overwritten
     252                 :  * or shadowed. However, we can still do better than the general case by
     253                 :  * hard-coding the necessary properties for us to find the native we expect.
     254                 :  *
     255                 :  * TODO: a per-thread shape-based cache would be faster and simpler.
     256                 :  */
     257                 : static JS_ALWAYS_INLINE bool
     258          186032 : ClassMethodIsNative(JSContext *cx, JSObject *obj, Class *clasp, jsid methodid, JSNative native)
     259                 : {
     260          186032 :     JS_ASSERT(obj->getClass() == clasp);
     261                 : 
     262                 :     Value v;
     263          186032 :     if (!HasDataProperty(cx, obj, methodid, &v)) {
     264          186032 :         JSObject *proto = obj->getProto();
     265          186032 :         if (!proto || proto->getClass() != clasp || !HasDataProperty(cx, proto, methodid, &v))
     266              18 :             return false;
     267                 :     }
     268                 : 
     269          186014 :     return js::IsNativeFunction(v, native);
     270                 : }
     271                 : 
     272                 : extern JS_ALWAYS_INLINE bool
     273                 : SameTraceType(const Value &lhs, const Value &rhs)
     274                 : {
     275                 :     return SameType(lhs, rhs) &&
     276                 :            (lhs.isPrimitive() ||
     277                 :             lhs.toObject().isFunction() == rhs.toObject().isFunction());
     278                 : }
     279                 : 
     280                 : /* Valueified JS_IsConstructing. */
     281                 : static JS_ALWAYS_INLINE bool
     282          400129 : IsConstructing(const Value *vp)
     283                 : {
     284                 : #ifdef DEBUG
     285          400129 :     JSObject *callee = &JS_CALLEE(cx, vp).toObject();
     286          400129 :     if (callee->isFunction()) {
     287          400129 :         JSFunction *fun = callee->toFunction();
     288          400129 :         JS_ASSERT((fun->flags & JSFUN_CONSTRUCTOR) != 0);
     289                 :     } else {
     290               0 :         JS_ASSERT(callee->getClass()->construct != NULL);
     291                 :     }
     292                 : #endif
     293          400129 :     return vp[1].isMagic();
     294                 : }
     295                 : 
     296                 : inline bool
     297          367649 : IsConstructing(CallReceiver call)
     298                 : {
     299          367649 :     return IsConstructing(call.base());
     300                 : }
     301                 : 
     302                 : inline const char *
     303            2276 : GetFunctionNameBytes(JSContext *cx, JSFunction *fun, JSAutoByteString *bytes)
     304                 : {
     305            2276 :     if (fun->atom)
     306            2276 :         return bytes->encode(cx, fun->atom);
     307               0 :     return js_anonymous_str;
     308                 : }
     309                 : 
     310                 : extern JSFunctionSpec function_methods[];
     311                 : 
     312                 : extern JSBool
     313                 : Function(JSContext *cx, unsigned argc, Value *vp);
     314                 : 
     315                 : extern bool
     316                 : IsBuiltinFunctionConstructor(JSFunction *fun);
     317                 : 
     318                 : /*
     319                 :  * Preconditions: funobj->isInterpreted() && !funobj->isFunctionPrototype() &&
     320                 :  * !funobj->isBoundFunction(). This is sufficient to establish that funobj has
     321                 :  * a non-configurable non-method .prototype data property, thought it might not
     322                 :  * have been resolved yet, and its value could be anything.
     323                 :  *
     324                 :  * Return the shape of the .prototype property of funobj, resolving it if
     325                 :  * needed. On error, return NULL.
     326                 :  *
     327                 :  * This is not safe to call on trace because it defines properties, which can
     328                 :  * trigger lookups that could reenter.
     329                 :  */
     330                 : const Shape *
     331                 : LookupInterpretedFunctionPrototype(JSContext *cx, JSObject *funobj);
     332                 : 
     333                 : static inline JSObject *
     334        13782678 : SkipScopeParent(JSObject *parent)
     335                 : {
     336        13782678 :     if (!parent)
     337          176868 :         return NULL;
     338        29129022 :     while (parent->isScope())
     339         1917402 :         parent = &parent->asScope().enclosingScope();
     340        13605810 :     return parent;
     341                 : }
     342                 : 
     343                 : inline JSFunction *
     344         2403127 : CloneFunctionObject(JSContext *cx, JSFunction *fun, JSObject *parent,
     345                 :                     gc::AllocKind kind = JSFunction::FinalizeKind)
     346                 : {
     347         2403127 :     JS_ASSERT(parent);
     348         2403127 :     JSObject *proto = parent->global().getOrCreateFunctionPrototype(cx);
     349         2403127 :     if (!proto)
     350               0 :         return NULL;
     351                 : 
     352         2403127 :     return js_CloneFunctionObject(cx, fun, parent, proto, kind);
     353                 : }
     354                 : 
     355                 : inline JSFunction *
     356         1828233 : CloneFunctionObjectIfNotSingleton(JSContext *cx, JSFunction *fun, JSObject *parent)
     357                 : {
     358                 :     /*
     359                 :      * For attempts to clone functions at a function definition opcode or from
     360                 :      * a method barrier, don't perform the clone if the function has singleton
     361                 :      * type. This was called pessimistically, and we need to preserve the
     362                 :      * type's property that if it is singleton there is only a single object
     363                 :      * with its type in existence.
     364                 :      */
     365         1828233 :     if (fun->hasSingletonType()) {
     366           21261 :         if (!fun->setParent(cx, SkipScopeParent(parent)))
     367               0 :             return NULL;
     368           21261 :         fun->setEnvironment(parent);
     369           21261 :         return fun;
     370                 :     }
     371                 : 
     372         1806972 :     return CloneFunctionObject(cx, fun, parent);
     373                 : }
     374                 : 
     375                 : inline JSFunction *
     376            6344 : CloneFunctionObject(JSContext *cx, JSFunction *fun)
     377                 : {
     378                 :     /*
     379                 :      * Variant which makes an exact clone of fun, preserving parent and proto.
     380                 :      * Calling the above version CloneFunctionObject(cx, fun, fun->getParent())
     381                 :      * is not equivalent: API clients, including XPConnect, can reparent
     382                 :      * objects so that fun->global() != fun->getProto()->global().
     383                 :      * See ReparentWrapperIfFound.
     384                 :      */
     385            6344 :     JS_ASSERT(fun->getParent() && fun->getProto());
     386                 : 
     387            6344 :     if (fun->hasSingletonType())
     388            1110 :         return fun;
     389                 : 
     390                 :     return js_CloneFunctionObject(cx, fun, fun->environment(), fun->getProto(),
     391            5234 :                                   JSFunction::ExtendedFinalizeKind);
     392                 : }
     393                 : 
     394                 : } /* namespace js */
     395                 : 
     396                 : inline void
     397         1165565 : JSFunction::setScript(JSScript *script_)
     398                 : {
     399         1165565 :     JS_ASSERT(isInterpreted());
     400         1165565 :     script() = script_;
     401         1165565 : }
     402                 : 
     403                 : inline void
     404         2446913 : JSFunction::initScript(JSScript *script_)
     405                 : {
     406         2446913 :     JS_ASSERT(isInterpreted());
     407         2446913 :     script().init(script_);
     408         2446913 : }
     409                 : 
     410                 : #endif /* jsfuninlines_h___ */

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