LCOV - app.info - js/jsd/jsd_step.c

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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