LCOV - code coverage report
Current view: directory - js/src - jswatchpoint.h (source / functions) Found Hit Coverage
Test: app.info Lines: 8 8 100.0 %
Date: 2012-06-02 Functions: 11 11 100.0 %

       1                 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
       2                 :  *
       3                 :  * ***** BEGIN LICENSE BLOCK *****
       4                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       5                 :  *
       6                 :  * The contents of this file are subject to the Mozilla Public License Version
       7                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       8                 :  * the License. You may obtain a copy of the License at
       9                 :  * http://www.mozilla.org/MPL/
      10                 :  *
      11                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      12                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      13                 :  * for the specific language governing rights and limitations under the
      14                 :  * License.
      15                 :  *
      16                 :  * The Original Code is an implementation of watchpoints for SpiderMonkey.
      17                 :  *
      18                 :  * The Initial Developer of the Original Code is
      19                 :  * Mozilla Foundation.
      20                 :  * Portions created by the Initial Developer are Copyright (C) 2011
      21                 :  * the Initial Developer. All Rights Reserved.
      22                 :  *
      23                 :  * Contributor(s):
      24                 :  *   Jason Orendorff <jorendorff@mozilla.com>
      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 jswatchpoint_h___
      41                 : #define jswatchpoint_h___
      42                 : 
      43                 : #include "jsalloc.h"
      44                 : #include "jsprvtd.h"
      45                 : #include "jsapi.h"
      46                 : #include "jsfriendapi.h"
      47                 : 
      48                 : #include "gc/Barrier.h"
      49                 : #include "js/HashTable.h"
      50                 : 
      51                 : namespace js {
      52                 : 
      53           54129 : struct WatchKey {
      54           25698 :     WatchKey() {}
      55            8036 :     WatchKey(JSObject *obj, jsid id) : object(obj), id(id) {}
      56            3783 :     WatchKey(const WatchKey &key) : object(key.object.get()), id(key.id.get()) {}
      57                 :     HeapPtrObject object;
      58                 :     HeapId id;
      59                 : };
      60                 : 
      61           75736 : struct Watchpoint {
      62                 :     JSWatchPointHandler handler;
      63                 :     HeapPtrObject closure;
      64                 :     bool held;  /* true if currently running handler */
      65                 : };
      66                 : 
      67                 : template <>
      68                 : struct DefaultHasher<WatchKey> {
      69                 :     typedef WatchKey Lookup;
      70                 :     static inline js::HashNumber hash(const Lookup &key);
      71                 : 
      72            5796 :     static bool match(const WatchKey &k, const Lookup &l) {
      73            5796 :         return k.object == l.object && k.id.get() == l.id.get();
      74                 :     }
      75                 : };
      76                 : 
      77             450 : class WatchpointMap {
      78                 :   public:
      79                 :     typedef HashMap<WatchKey, Watchpoint, DefaultHasher<WatchKey>, SystemAllocPolicy> Map;
      80                 : 
      81                 :     bool init();
      82                 :     bool watch(JSContext *cx, JSObject *obj, jsid id,
      83                 :                JSWatchPointHandler handler, JSObject *closure);
      84                 :     void unwatch(JSObject *obj, jsid id,
      85                 :                  JSWatchPointHandler *handlerp, JSObject **closurep);
      86                 :     void unwatchObject(JSObject *obj);
      87                 :     void clear();
      88                 : 
      89                 :     bool triggerWatchpoint(JSContext *cx, JSObject *obj, jsid id, Value *vp);
      90                 : 
      91                 :     static bool markAllIteratively(JSTracer *trc);
      92                 :     bool markIteratively(JSTracer *trc);
      93                 :     void markAll(JSTracer *trc);
      94                 :     static void sweepAll(JSRuntime *rt);
      95                 :     void sweep();
      96                 : 
      97                 :     static void traceAll(WeakMapTracer *trc);
      98                 :     void trace(WeakMapTracer *trc);
      99                 : 
     100                 :   private:
     101                 :     Map map;
     102                 : };
     103                 : 
     104                 : }
     105                 : 
     106                 : #endif /* jswatchpoint_h___ */

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