LCOV - code coverage report
Current view: directory - js/src - jspropertycacheinlines.h (source / functions) Found Hit Coverage
Test: app.info Lines: 26 26 100.0 %
Date: 2012-06-02 Functions: 2 2 100.0 %

       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 Mozilla Communicator client code, released
      18                 :  * March 31, 1998.
      19                 :  *
      20                 :  * The Initial Developer of the Original Code is
      21                 :  * Mozilla Corporation.
      22                 :  * Portions created by the Initial Developer are Copyright (C) 2010
      23                 :  * the Initial Developer. All Rights Reserved.
      24                 :  *
      25                 :  * Contributor(s):
      26                 :  *   Igor Bukanov <igor@mir2.org>
      27                 :  *
      28                 :  * Alternatively, the contents of this file may be used under the terms of
      29                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      30                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      31                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      32                 :  * of those above. If you wish to allow use of your version of this file only
      33                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      34                 :  * use your version of this file under the terms of the MPL, indicate your
      35                 :  * decision by deleting the provisions above and replace them with the notice
      36                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      37                 :  * the provisions above, a recipient may use your version of this file under
      38                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      39                 :  *
      40                 :  * ***** END LICENSE BLOCK ***** */
      41                 : 
      42                 : #ifndef jspropertycacheinlines_h___
      43                 : #define jspropertycacheinlines_h___
      44                 : 
      45                 : #include "jslock.h"
      46                 : #include "jspropertycache.h"
      47                 : #include "jsscope.h"
      48                 : 
      49                 : /*
      50                 :  * This method is designed to inline the fast path in js_Interpret, so it makes
      51                 :  * "just-so" restrictions on parameters, e.g. pobj and obj should not be the
      52                 :  * same variable, since for JOF_PROP-mode opcodes, obj must not be changed
      53                 :  * because of a cache miss.
      54                 :  *
      55                 :  * On return, if name is null then obj points to the scope chain element in
      56                 :  * which the property was found, pobj is locked, and entry is valid. If name is
      57                 :  * non-null then no object is locked but entry is still set correctly for use,
      58                 :  * e.g., by PropertyCache::fill and name should be used as the id to find.
      59                 :  *
      60                 :  * We must lock pobj on a hit in order to close races with threads that might
      61                 :  * be deleting a property from its scope, or otherwise invalidating property
      62                 :  * caches (on all threads) by re-generating JSObject::shape().
      63                 :  */
      64                 : JS_ALWAYS_INLINE void
      65       120564095 : js::PropertyCache::test(JSContext *cx, jsbytecode *pc, JSObject *&obj,
      66                 :                         JSObject *&pobj, PropertyCacheEntry *&entry, PropertyName *&name)
      67                 : {
      68       120564095 :     JS_ASSERT(this == &JS_PROPERTY_CACHE(cx));
      69                 : 
      70       120564095 :     const Shape *kshape = obj->lastProperty();
      71       120564095 :     entry = &table[hash(pc, kshape)];
      72                 :     PCMETER(pctestentry = entry);
      73                 :     PCMETER(tests++);
      74       120564095 :     JS_ASSERT(&obj != &pobj);
      75       120564095 :     if (entry->kpc == pc && entry->kshape == kshape) {
      76                 :         JSObject *tmp;
      77        99544290 :         pobj = obj;
      78       108240230 :         if (entry->isPrototypePropertyHit() &&
      79         8695940 :             (tmp = pobj->getProto()) != NULL) {
      80         8695940 :             pobj = tmp;
      81                 :         }
      82                 : 
      83        99544290 :         if (pobj->lastProperty() == entry->pshape) {
      84                 :             PCMETER(pchits++);
      85                 :             PCMETER(entry->isOwnPropertyHit() || protopchits++);
      86        99379969 :             name = NULL;
      87        99379969 :             return;
      88                 :         }
      89                 :     }
      90        21184126 :     name = fullTest(cx, pc, &obj, &pobj, entry);
      91        21184126 :     if (name)
      92                 :         PCMETER(misses++);
      93                 : }
      94                 : 
      95                 : JS_ALWAYS_INLINE bool
      96        17694228 : js::PropertyCache::testForSet(JSContext *cx, jsbytecode *pc, JSObject *obj,
      97                 :                               PropertyCacheEntry **entryp, JSObject **obj2p, PropertyName **namep)
      98                 : {
      99        17694228 :     JS_ASSERT(this == &JS_PROPERTY_CACHE(cx));
     100                 : 
     101        17694228 :     const Shape *kshape = obj->lastProperty();
     102        17694228 :     PropertyCacheEntry *entry = &table[hash(pc, kshape)];
     103        17694228 :     *entryp = entry;
     104                 :     PCMETER(pctestentry = entry);
     105                 :     PCMETER(tests++);
     106                 :     PCMETER(settests++);
     107        17694228 :     if (entry->kpc == pc && entry->kshape == kshape)
     108        15016855 :         return true;
     109                 : 
     110         2677373 :     PropertyName *name = fullTest(cx, pc, &obj, obj2p, entry);
     111         2677373 :     JS_ASSERT(name);
     112                 : 
     113                 :     PCMETER(misses++);
     114                 :     PCMETER(setmisses++);
     115                 : 
     116         2677373 :     *namep = name;
     117         2677373 :     return false;
     118                 : }
     119                 : 
     120                 : #endif /* jspropertycacheinlines_h___ */

Generated by: LCOV version 1.7