LCOV - code coverage report
Current view: directory - js/jsd - jsd_step.c (source / functions) Found Hit Coverage
Test: app.info Lines: 91 21 23.1 %
Date: 2012-06-02 Functions: 3 3 100.0 %

       1                 : /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is mozilla.org code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1998
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      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"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : /*
      39                 :  * JavaScript Debugging support - Stepping support
      40                 :  */
      41                 : 
      42                 : #include "jsd.h"
      43                 : 
      44                 : /*
      45                 : * #define JSD_TRACE 1
      46                 : */
      47                 : 
      48                 : #ifdef JSD_TRACE
      49                 : 
      50                 : static char*
      51                 : _indentSpaces(int i)
      52                 : {
      53                 : #define MAX_INDENT 63
      54                 :     static char* p = NULL;
      55                 :     if(!p)
      56                 :     {
      57                 :         p = calloc(1, MAX_INDENT+1);
      58                 :         if(!p) return "";
      59                 :         memset(p, ' ', MAX_INDENT);
      60                 :     }
      61                 :     if(i > MAX_INDENT) return p;
      62                 :     return p + MAX_INDENT-i;
      63                 : }
      64                 : 
      65                 : static void
      66                 : _interpreterTrace(JSDContext* jsdc, JSContext *cx, JSStackFrame *fp,
      67                 :                   JSBool before)
      68                 : {
      69                 :     JSDScript* jsdscript = NULL;
      70                 :     JSScript * script;
      71                 :     static indent = 0;
      72                 :     JSString* funName = NULL;
      73                 : 
      74                 :     script = JS_GetFrameScript(cx, fp);
      75                 :     if(script)
      76                 :     {
      77                 :         JSD_LOCK_SCRIPTS(jsdc);
      78                 :         jsdscript = jsd_FindOrCreateJSDScript(jsdc, cx, script, fp);
      79                 :         JSD_UNLOCK_SCRIPTS(jsdc);
      80                 :         if(jsdscript)
      81                 :             funName = JSD_GetScriptFunctionId(jsdc, jsdscript);
      82                 :     }
      83                 : 
      84                 :     if(before)
      85                 :         printf("%sentering ", _indentSpaces(indent++));
      86                 :     else
      87                 :         printf("%sleaving ", _indentSpaces(--indent));
      88                 : 
      89                 :     if (!funName)
      90                 :         printf("TOP_LEVEL");
      91                 :     else
      92                 :         JS_FileEscapedString(stdout, funName, 0);
      93                 : 
      94                 :     if(before)
      95                 :     {
      96                 :         jsval thisVal;
      97                 : 
      98                 :         printf("%s this: ", JS_IsConstructorFrame(cx, fp) ? "constructing":"");
      99                 : 
     100                 :         if (JS_GetFrameThis(cx, fp, &thisVal))
     101                 :             printf("0x%0llx", (uintptr_t) thisVal);
     102                 :         else
     103                 :             puts("<unavailable>");
     104                 :     }
     105                 :     printf("\n");
     106                 :     JS_ASSERT(indent >= 0);
     107                 : }
     108                 : #endif
     109                 : 
     110                 : JSBool
     111         5801760 : _callHook(JSDContext *jsdc, JSContext *cx, JSStackFrame *fp, JSBool before,
     112                 :           unsigned type, JSD_CallHookProc hook, void *hookData)
     113                 : {
     114                 :     JSDScript*        jsdscript;
     115                 :     JSScript*         jsscript;
     116         5801760 :     JSBool            hookresult = JS_TRUE;
     117                 :     
     118         5801760 :     if (!jsdc || !jsdc->inited)
     119               0 :         return JS_FALSE;
     120                 : 
     121         5801760 :     if (!hook && !(jsdc->flags & JSD_COLLECT_PROFILE_DATA))
     122                 :     {
     123                 :         /* no hook to call, no profile data needs to be collected,
     124                 :          * so there is nothing to do here.
     125                 :          */
     126         5801760 :         return hookresult;
     127                 :     }
     128                 :     
     129               0 :     if (before && JS_IsConstructorFrame(cx, fp)) {
     130                 :         jsval newObj;
     131               0 :         if (!JS_GetFrameThis(cx, fp, &newObj))
     132               0 :             return JS_FALSE;
     133               0 :         jsd_Constructing(jsdc, cx, JSVAL_TO_OBJECT(newObj), fp);
     134                 :     }
     135                 : 
     136               0 :     jsscript = JS_GetFrameScript(cx, fp);
     137               0 :     if (jsscript)
     138                 :     {
     139               0 :         JSD_LOCK_SCRIPTS(jsdc);
     140               0 :         jsdscript = jsd_FindOrCreateJSDScript(jsdc, cx, jsscript, fp);
     141               0 :         JSD_UNLOCK_SCRIPTS(jsdc);
     142                 :     
     143               0 :         if (jsdscript)
     144                 :         {
     145               0 :             if (JSD_IS_PROFILE_ENABLED(jsdc, jsdscript))
     146               0 :             {
     147                 :                 JSDProfileData *pdata;
     148               0 :                 pdata = jsd_GetScriptProfileData (jsdc, jsdscript);
     149               0 :                 if (pdata)
     150                 :                 {
     151               0 :                     if (before)
     152                 :                     {
     153               0 :                         if (!pdata->lastCallStart)
     154                 :                         {
     155                 :                             int64_t now;
     156                 :                             JSDProfileData *callerpdata;
     157                 :                             
     158                 :                             /* Get the time just the once, for consistency. */
     159               0 :                             now = JS_Now();
     160                 :                             /* This contains a pointer to the profile data for
     161                 :                              * the caller of this function. */
     162               0 :                             callerpdata = jsdc->callingFunctionPData;
     163               0 :                             if (callerpdata)
     164                 :                             {
     165                 :                                 int64_t ll_delta;
     166               0 :                                 pdata->caller = callerpdata;
     167                 :                                 /* We need to 'stop' the timer for the caller.
     168                 :                                  * Use time since last return if appropriate. */
     169               0 :                                 ll_delta = jsdc->lastReturnTime
     170               0 :                                            ? now - jsdc->lastReturnTime
     171               0 :                                            : now - callerpdata->lastCallStart;
     172               0 :                                 callerpdata->runningTime += ll_delta;
     173                 :                             }
     174                 :                             /* We're the new current function, and no return
     175                 :                              * has happened yet. */
     176               0 :                             jsdc->callingFunctionPData = pdata;
     177               0 :                             jsdc->lastReturnTime = 0;
     178                 :                             /* This function has no running time (just been
     179                 :                              * called!), and we'll need the call start time. */
     180               0 :                             pdata->runningTime = 0;
     181               0 :                             pdata->lastCallStart = now;
     182                 :                         } else {
     183               0 :                             if (++pdata->recurseDepth > pdata->maxRecurseDepth)
     184               0 :                                 pdata->maxRecurseDepth = pdata->recurseDepth;
     185                 :                         }
     186                 :                         /* make sure we're called for the return too. */
     187               0 :                         hookresult = JS_TRUE;
     188               0 :                     } else if (!pdata->recurseDepth && pdata->lastCallStart) {
     189                 :                         int64_t now, ll_delta;
     190                 :                         double delta;
     191               0 :                         now = JS_Now();
     192               0 :                         ll_delta = now - pdata->lastCallStart;
     193               0 :                         delta = ll_delta;
     194               0 :                         delta /= 1000.0;
     195               0 :                         pdata->totalExecutionTime += delta;
     196                 :                         /* minExecutionTime starts as 0, so we need to overwrite
     197                 :                          * it on the first call always. */
     198               0 :                         if ((0 == pdata->callCount) ||
     199               0 :                             delta < pdata->minExecutionTime)
     200                 :                         {
     201               0 :                             pdata->minExecutionTime = delta;
     202                 :                         }
     203               0 :                         if (delta > pdata->maxExecutionTime)
     204               0 :                             pdata->maxExecutionTime = delta;
     205                 :                         
     206                 :                         /* If we last returned from a function (as opposed to
     207                 :                          * having last entered this function), we need to inc.
     208                 :                          * the running total by the time delta since the last
     209                 :                          * return, and use the running total instead of the
     210                 :                          * delta calculated above. */
     211               0 :                         if (jsdc->lastReturnTime)
     212                 :                         {
     213                 :                             /* Add last chunk to running time, and use total
     214                 :                              * running time as 'delta'. */
     215               0 :                             ll_delta = now - jsdc->lastReturnTime;
     216               0 :                             pdata->runningTime += ll_delta;
     217               0 :                             delta = pdata->runningTime;
     218               0 :                             delta /= 1000.0;
     219                 :                         }
     220                 :                         
     221               0 :                         pdata->totalOwnExecutionTime += delta;
     222                 :                         /* See minExecutionTime comment above. */
     223               0 :                         if ((0 == pdata->callCount) ||
     224               0 :                             delta < pdata->minOwnExecutionTime)
     225                 :                         {
     226               0 :                             pdata->minOwnExecutionTime = delta;
     227                 :                         }
     228               0 :                         if (delta > pdata->maxOwnExecutionTime)
     229               0 :                             pdata->maxOwnExecutionTime = delta;
     230                 :                         
     231                 :                         /* Current function is now our caller. */
     232               0 :                         jsdc->callingFunctionPData = pdata->caller;
     233                 :                         /* No hanging pointers, please. */
     234               0 :                         pdata->caller = NULL;
     235                 :                         /* Mark the time we returned, and indicate this
     236                 :                          * function is no longer running. */
     237               0 :                         jsdc->lastReturnTime = now;
     238               0 :                         pdata->lastCallStart = 0;
     239               0 :                         ++pdata->callCount;
     240               0 :                     } else if (pdata->recurseDepth) {
     241               0 :                         --pdata->recurseDepth;
     242               0 :                         ++pdata->callCount;
     243                 :                     }
     244                 :                 }
     245               0 :                 if (hook)
     246               0 :                     jsd_CallCallHook (jsdc, cx, type, hook, hookData);
     247                 :             } else {
     248               0 :                 if (hook)
     249               0 :                     hookresult = 
     250                 :                         jsd_CallCallHook (jsdc, cx, type, hook, hookData);
     251                 :                 else
     252               0 :                     hookresult = JS_TRUE;
     253                 :             }
     254                 :         }
     255                 :     }
     256                 : 
     257                 : #ifdef JSD_TRACE
     258                 :     _interpreterTrace(jsdc, cx, fp, before);
     259                 :     return JS_TRUE;
     260                 : #else
     261               0 :     return hookresult;
     262                 : #endif
     263                 : 
     264                 : }
     265                 : 
     266                 : void *
     267         5791558 : jsd_FunctionCallHook(JSContext *cx, JSStackFrame *fp, JSBool before,
     268                 :                      JSBool *ok, void *closure)
     269                 : {
     270                 :     JSDContext*       jsdc;
     271                 :     JSD_CallHookProc  hook;
     272                 :     void*             hookData;
     273                 : 
     274         5791558 :     jsdc = (JSDContext*) closure;
     275                 :     
     276                 :     /* local in case jsdc->functionHook gets cleared on another thread */
     277         5791558 :     JSD_LOCK();
     278         5791558 :     hook     = jsdc->functionHook;
     279         5791558 :     hookData = jsdc->functionHookData;
     280         5791558 :     JSD_UNLOCK();
     281                 :     
     282         5791558 :     if (_callHook (jsdc, cx, fp, before,
     283                 :                    (before) ? JSD_HOOK_FUNCTION_CALL : JSD_HOOK_FUNCTION_RETURN,
     284                 :                    hook, hookData))
     285                 :     {
     286         5791558 :         return closure;
     287                 :     }
     288                 :     
     289               0 :     return NULL;
     290                 : }
     291                 : 
     292                 : void *
     293           10202 : jsd_TopLevelCallHook(JSContext *cx, JSStackFrame *fp, JSBool before,
     294                 :                      JSBool *ok, void *closure)
     295                 : {
     296                 :     JSDContext*       jsdc;
     297                 :     JSD_CallHookProc  hook;
     298                 :     void*             hookData;
     299                 : 
     300           10202 :     jsdc = (JSDContext*) closure;
     301                 : 
     302                 :     /* local in case jsdc->toplevelHook gets cleared on another thread */
     303           10202 :     JSD_LOCK();
     304           10202 :     hook     = jsdc->toplevelHook;
     305           10202 :     hookData = jsdc->toplevelHookData;
     306           10202 :     JSD_UNLOCK();
     307                 :     
     308           10202 :     if (_callHook (jsdc, cx, fp, before,
     309                 :                    (before) ? JSD_HOOK_TOPLEVEL_START : JSD_HOOK_TOPLEVEL_END,
     310                 :                    hook, hookData))
     311                 :     {
     312           10202 :         return closure;
     313                 :     }
     314                 :     
     315               0 :     return NULL;
     316                 :     
     317                 : }

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