js/jsd/jsd_obj.c

   1 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /* ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
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   6  * 1.1 (the "License"); you may not use this file except in compliance with
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  11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  12  * for the specific language governing rights and limitations under the
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  15  * The Original Code is mozilla.org code.
  16  *
  17  * The Initial Developer of the Original Code is
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  19  * Portions created by the Initial Developer are Copyright (C) 1998
  20  * the Initial Developer. All Rights Reserved.
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  23  *
  24  * Alternatively, the contents of this file may be used under the terms of
  25  * either the GNU General Public License Version 2 or later (the "GPL"), or
  26  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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  34  * the terms of any one of the MPL, the GPL or the LGPL.
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  36  * ***** END LICENSE BLOCK ***** */
  37
  38 /*
  39  * JavaScript Debugging support - Object support
  40  */
  41
  42 #include "jsd.h"
  43
  44 /*
  45 * #define JSD_TRACE 1
  46 */
  47
  48 #ifdef JSD_TRACE
  49 #define TRACEOBJ(jsdc, jsdobj, which) _traceObj(jsdc, jsdobj, which)
  50
  51 static char *
  52 _describeObj(JSDContext* jsdc, JSDObject *jsdobj)
  53 {
  54     return
  55         JS_smprintf("%0x new'd in %s at line %d using ctor %s in %s at line %d",
  56                     (int)jsdobj,
  57                     JSD_GetObjectNewURL(jsdc, jsdobj),
  58                     JSD_GetObjectNewLineNumber(jsdc, jsdobj),
  59                     JSD_GetObjectConstructorName(jsdc, jsdobj),
  60                     JSD_GetObjectConstructorURL(jsdc, jsdobj),
  61                     JSD_GetObjectConstructorLineNumber(jsdc, jsdobj));
  62 }
  63
  64 static void
  65 _traceObj(JSDContext* jsdc, JSDObject* jsdobj, int which)
  66 {
  67     char* description;
  68
  69     if( !jsdobj )
  70         return;
  71
  72     description = _describeObj(jsdc, jsdobj);
  73
  74     printf("%s : %s\n",
  75            which == 0 ? "new  " :
  76            which == 1 ? "final" :
  77                         "ctor ",
  78            description);
  79     if(description)
  80         free(description);
  81 }
  82 #else
  83 #define TRACEOBJ(jsdc, jsdobj, which) ((void)0)
  84 #endif /* JSD_TRACE */
  85
  86 #ifdef DEBUG
  87 void JSD_ASSERT_VALID_OBJECT(JSDObject* jsdobj)
  88 {
  89     JS_ASSERT(jsdobj);
  90     JS_ASSERT(!JS_CLIST_IS_EMPTY(&jsdobj->links));
  91     JS_ASSERT(jsdobj->obj);
  92 }
  93 #endif
  94
  95
  96 static void
  97 _destroyJSDObject(JSDContext* jsdc, JSDObject* jsdobj)
  98 {
  99     JS_ASSERT(JSD_OBJECTS_LOCKED(jsdc));
 100
 101     JS_REMOVE_LINK(&jsdobj->links);
 102     JS_HashTableRemove(jsdc->objectsTable, jsdobj->obj);
 103
 104     if(jsdobj->newURL)
 105         jsd_DropAtom(jsdc, jsdobj->newURL);
 106     if(jsdobj->ctorURL)
 107         jsd_DropAtom(jsdc, jsdobj->ctorURL);
 108     if(jsdobj->ctorName)
 109         jsd_DropAtom(jsdc, jsdobj->ctorName);
 110     free(jsdobj);
 111 }
 112
 113 static JSDObject*
 114 _createJSDObject(JSDContext* jsdc, JSContext *cx, JSObject *obj)
 115 {
 116     JSDObject* jsdobj;
 117     JSStackFrame* fp;
 118     JSStackFrame* iter = NULL;
 119     const char* newURL;
 120     jsbytecode* pc;
 121
 122     JS_ASSERT(JSD_OBJECTS_LOCKED(jsdc));
 123
 124     jsdobj = (JSDObject*) calloc(1, sizeof(JSDObject));
 125     if (jsdobj)
 126     {
 127         JS_INIT_CLIST(&jsdobj->links);
 128         JS_APPEND_LINK(&jsdobj->links, &jsdc->objectsList);
 129         jsdobj->obj = obj;
 130         JS_HashTableAdd(jsdc->objectsTable, obj, jsdobj);
 131     }
 132     return jsdobj;
 133 }
 134
 135 void
 136 jsd_Constructing(JSDContext* jsdc, JSContext *cx, JSObject *obj,
 137                  JSStackFrame *fp)
 138 {
 139     JSDObject* jsdobj;
 140     JSScript* script;
 141     JSDScript* jsdscript;
 142     const char* ctorURL;
 143     const char* ctorName;
 144
 145     JSD_LOCK_OBJECTS(jsdc);
 146     jsdobj = jsd_GetJSDObjectForJSObject(jsdc, obj);
 147     if( jsdobj && !jsdobj->ctorURL && JS_IsScriptFrame(cx, fp) )
 148     {
 149         script = JS_GetFrameScript(cx, fp);
 150         if( script )
 151         {
 152             ctorURL = JS_GetScriptFilename(cx, script);
 153             if( ctorURL )
 154                 jsdobj->ctorURL = jsd_AddAtom(jsdc, ctorURL);
 155
 156             JSD_LOCK_SCRIPTS(jsdc);
 157             jsdscript = jsd_FindOrCreateJSDScript(jsdc, cx, script, fp);
 158             JSD_UNLOCK_SCRIPTS(jsdc);
 159             if( jsdscript )
 160             {
 161                 ctorName = jsd_GetScriptFunctionName(jsdc, jsdscript);
 162                 if( ctorName )
 163                     jsdobj->ctorName = jsd_AddAtom(jsdc, ctorName);
 164             }
 165             jsdobj->ctorLineno = JS_GetScriptBaseLineNumber(cx, script);
 166         }
 167     }
 168     TRACEOBJ(jsdc, jsdobj, 3);
 169     JSD_UNLOCK_OBJECTS(jsdc);
 170 }
 171
 172 static JSHashNumber
 173 _hash_root(const void *key)
 174 {
 175     return ((JSHashNumber) key) >> 2; /* help lame MSVC1.5 on Win16 */
 176 }
 177
 178 JSBool
 179 jsd_InitObjectManager(JSDContext* jsdc)
 180 {
 181     JS_INIT_CLIST(&jsdc->objectsList);
 182     jsdc->objectsTable = JS_NewHashTable(256, _hash_root,
 183                                          JS_CompareValues, JS_CompareValues,
 184                                          NULL, NULL);
 185     return (JSBool) jsdc->objectsTable;
 186 }
 187
 188 void
 189 jsd_DestroyObjectManager(JSDContext* jsdc)
 190 {
 191     jsd_DestroyObjects(jsdc);
 192     JSD_LOCK_OBJECTS(jsdc);
 193     JS_HashTableDestroy(jsdc->objectsTable);
 194     JSD_UNLOCK_OBJECTS(jsdc);
 195 }
 196
 197 void
 198 jsd_DestroyObjects(JSDContext* jsdc)
 199 {
 200     JSD_LOCK_OBJECTS(jsdc);
 201     while( !JS_CLIST_IS_EMPTY(&jsdc->objectsList) )
 202         _destroyJSDObject(jsdc, (JSDObject*)JS_NEXT_LINK(&jsdc->objectsList));
 203     JSD_UNLOCK_OBJECTS(jsdc);
 204 }
 205
 206 JSDObject*
 207 jsd_IterateObjects(JSDContext* jsdc, JSDObject** iterp)
 208 {
 209     JSDObject *jsdobj = *iterp;
 210
 211     JS_ASSERT(JSD_OBJECTS_LOCKED(jsdc));
 212
 213     if( !jsdobj )
 214         jsdobj = (JSDObject *)jsdc->objectsList.next;
 215     if( jsdobj == (JSDObject *)&jsdc->objectsList )
 216         return NULL;
 217     *iterp = (JSDObject*) jsdobj->links.next;
 218     return jsdobj;
 219 }
 220
 221 JSObject*
 222 jsd_GetWrappedObject(JSDContext* jsdc, JSDObject* jsdobj)
 223 {
 224     return jsdobj->obj;
 225 }
 226
 227 const char*
 228 jsd_GetObjectNewURL(JSDContext* jsdc, JSDObject* jsdobj)
 229 {
 230     if( jsdobj->newURL )
 231         return JSD_ATOM_TO_STRING(jsdobj->newURL);
 232     return NULL;
 233 }
 234
 235 uintN
 236 jsd_GetObjectNewLineNumber(JSDContext* jsdc, JSDObject* jsdobj)
 237 {
 238     return jsdobj->newLineno;
 239 }
 240
 241 const char*
 242 jsd_GetObjectConstructorURL(JSDContext* jsdc, JSDObject* jsdobj)
 243 {
 244     if( jsdobj->ctorURL )
 245         return JSD_ATOM_TO_STRING(jsdobj->ctorURL);
 246     return NULL;
 247 }
 248
 249 uintN
 250 jsd_GetObjectConstructorLineNumber(JSDContext* jsdc, JSDObject* jsdobj)
 251 {
 252     return jsdobj->ctorLineno;
 253 }
 254
 255 const char*
 256 jsd_GetObjectConstructorName(JSDContext* jsdc, JSDObject* jsdobj)
 257 {
 258     if( jsdobj->ctorName )
 259         return JSD_ATOM_TO_STRING(jsdobj->ctorName);
 260     return NULL;
 261 }
 262
 263 JSDObject*
 264 jsd_GetJSDObjectForJSObject(JSDContext* jsdc, JSObject* jsobj)
 265 {
 266     JSDObject* jsdobj;
 267
 268     JSD_LOCK_OBJECTS(jsdc);
 269     jsdobj = (JSDObject*) JS_HashTableLookup(jsdc->objectsTable, jsobj);
 270     JSD_UNLOCK_OBJECTS(jsdc);
 271     return jsdobj;
 272 }
 273
 274 JSDObject*
 275 jsd_GetObjectForValue(JSDContext* jsdc, JSDValue* jsdval)
 276 {
 277     return jsd_GetJSDObjectForJSObject(jsdc, JSVAL_TO_OBJECT(jsdval->val));
 278 }
 279
 280 JSDValue*
 281 jsd_GetValueForObject(JSDContext* jsdc, JSDObject* jsdobj)
 282 {
 283     return jsd_NewValue(jsdc, OBJECT_TO_JSVAL(jsdobj->obj));
 284 }
 285
 286