зеркало из https://github.com/mozilla/gecko-dev.git
321 строка
11 KiB
C
321 строка
11 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/*
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* JavaScript Debugging support - Stepping support
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*/
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#include "jsd.h"
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/*
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* #define JSD_TRACE 1
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*/
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#ifdef JSD_TRACE
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static char*
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_indentSpaces(int i)
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{
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#define MAX_INDENT 63
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static char* p = NULL;
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if(!p)
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{
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p = calloc(1, MAX_INDENT+1);
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if(!p) return "";
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memset(p, ' ', MAX_INDENT);
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}
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if(i > MAX_INDENT) return p;
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return p + MAX_INDENT-i;
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}
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static void
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_interpreterTrace(JSDContext* jsdc, JSContext *cx, JSStackFrame *fp,
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JSBool before)
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{
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JSDScript* jsdscript = NULL;
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JSScript * script;
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static indent = 0;
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char* buf;
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const char* funName = NULL;
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script = JS_GetFrameScript(cx, fp);
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if(script)
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{
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JSD_LOCK_SCRIPTS(jsdc);
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jsdscript = jsd_FindJSDScript(jsdc, script);
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JSD_UNLOCK_SCRIPTS(jsdc);
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if(jsdscript)
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funName = JSD_GetScriptFunctionName(jsdc, jsdscript);
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}
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if(!funName)
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funName = "TOP_LEVEL";
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if(before)
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{
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buf = JS_smprintf("%sentering %s %s this: %0x\n",
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_indentSpaces(indent++),
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funName,
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JS_IsConstructorFrame(cx, fp) ? "constructing":"",
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(int)JS_GetFrameThis(cx, fp));
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}
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else
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{
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buf = JS_smprintf("%sleaving %s\n",
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_indentSpaces(--indent),
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funName);
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}
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JS_ASSERT(indent >= 0);
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if(!buf)
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return;
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printf(buf);
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free(buf);
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}
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#endif
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JSBool
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_callHook(JSDContext *jsdc, JSContext *cx, JSStackFrame *fp, JSBool before,
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uintN type, JSD_CallHookProc hook, void *hookData)
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{
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JSDScript* jsdscript;
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JSScript* jsscript;
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JSBool hookresult = JS_TRUE;
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if (!jsdc || !jsdc->inited)
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return JS_FALSE;
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if (!hook && !(jsdc->flags & JSD_COLLECT_PROFILE_DATA) &&
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jsdc->flags & JSD_DISABLE_OBJECT_TRACE)
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{
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/* no hook to call, no profile data needs to be collected, and
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* the client has object tracing disabled, so there is nothing
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* to do here.
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*/
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return hookresult;
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}
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if (before && JS_IsConstructorFrame(cx, fp))
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jsd_Constructing(jsdc, cx, JS_GetFrameThis(cx, fp), fp);
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jsscript = JS_GetFrameScript(cx, fp);
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if (jsscript)
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{
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JSD_LOCK_SCRIPTS(jsdc);
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jsdscript = jsd_FindJSDScript(jsdc, jsscript);
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JSD_UNLOCK_SCRIPTS(jsdc);
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if (jsdscript)
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{
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if (JSD_IS_PROFILE_ENABLED(jsdc, jsdscript))
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{
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JSDProfileData *pdata;
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pdata = jsd_GetScriptProfileData (jsdc, jsdscript);
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if (pdata)
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{
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if (before)
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{
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if (JSLL_IS_ZERO(pdata->lastCallStart))
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{
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int64 now;
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JSDProfileData *callerpdata;
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/* Get the time just the once, for consistency. */
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now = JS_Now();
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/* This contains a pointer to the profile data for
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* the caller of this function. */
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callerpdata = jsdc->callingFunctionPData;
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if (callerpdata)
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{
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int64 ll_delta;
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pdata->caller = callerpdata;
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/* We need to 'stop' the timer for the caller.
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* Use time since last return if appropriate. */
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if (JSLL_IS_ZERO(jsdc->lastReturnTime))
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{
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JSLL_SUB(ll_delta, now, callerpdata->lastCallStart);
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} else {
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JSLL_SUB(ll_delta, now, jsdc->lastReturnTime);
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}
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JSLL_ADD(callerpdata->runningTime, callerpdata->runningTime, ll_delta);
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}
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/* We're the new current function, and no return
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* has happened yet. */
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jsdc->callingFunctionPData = pdata;
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jsdc->lastReturnTime = JSLL_ZERO;
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/* This function has no running time (just been
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* called!), and we'll need the call start time. */
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pdata->runningTime = JSLL_ZERO;
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pdata->lastCallStart = now;
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} else {
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if (++pdata->recurseDepth > pdata->maxRecurseDepth)
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pdata->maxRecurseDepth = pdata->recurseDepth;
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}
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/* make sure we're called for the return too. */
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hookresult = JS_TRUE;
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} else if (!pdata->recurseDepth &&
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!JSLL_IS_ZERO(pdata->lastCallStart)) {
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int64 now, ll_delta;
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jsdouble delta;
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now = JS_Now();
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JSLL_SUB(ll_delta, now, pdata->lastCallStart);
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JSLL_L2D(delta, ll_delta);
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delta /= 1000.0;
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pdata->totalExecutionTime += delta;
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/* minExecutionTime starts as 0, so we need to overwrite
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* it on the first call always. */
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if ((0 == pdata->callCount) ||
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delta < pdata->minExecutionTime)
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{
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pdata->minExecutionTime = delta;
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}
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if (delta > pdata->maxExecutionTime)
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pdata->maxExecutionTime = delta;
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/* If we last returned from a function (as opposed to
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* having last entered this function), we need to inc.
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* the running total by the time delta since the last
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* return, and use the running total instead of the
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* delta calculated above. */
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if (!JSLL_IS_ZERO(jsdc->lastReturnTime))
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{
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/* Add last chunk to running time, and use total
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* running time as 'delta'. */
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JSLL_SUB(ll_delta, now, jsdc->lastReturnTime);
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JSLL_ADD(pdata->runningTime, pdata->runningTime, ll_delta);
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JSLL_L2D(delta, pdata->runningTime);
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delta /= 1000.0;
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}
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pdata->totalOwnExecutionTime += delta;
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/* See minExecutionTime comment above. */
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if ((0 == pdata->callCount) ||
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delta < pdata->minOwnExecutionTime)
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{
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pdata->minOwnExecutionTime = delta;
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}
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if (delta > pdata->maxOwnExecutionTime)
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pdata->maxOwnExecutionTime = delta;
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/* Current function is now our caller. */
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jsdc->callingFunctionPData = pdata->caller;
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/* No hanging pointers, please. */
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pdata->caller = NULL;
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/* Mark the time we returned, and indicate this
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* function is no longer running. */
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jsdc->lastReturnTime = now;
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pdata->lastCallStart = JSLL_ZERO;
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++pdata->callCount;
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} else if (pdata->recurseDepth) {
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--pdata->recurseDepth;
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++pdata->callCount;
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}
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}
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if (hook)
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jsd_CallCallHook (jsdc, cx, type, hook, hookData);
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} else {
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if (hook)
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hookresult =
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jsd_CallCallHook (jsdc, cx, type, hook, hookData);
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else
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hookresult = JS_TRUE;
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}
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}
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}
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#ifdef JSD_TRACE
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_interpreterTrace(jsdc, cx, fp, before);
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return JS_TRUE;
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#else
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return hookresult;
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#endif
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}
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void * JS_DLL_CALLBACK
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jsd_FunctionCallHook(JSContext *cx, JSStackFrame *fp, JSBool before,
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JSBool *ok, void *closure)
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{
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JSDContext* jsdc;
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JSD_CallHookProc hook;
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void* hookData;
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jsdc = (JSDContext*) closure;
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/* local in case jsdc->functionHook gets cleared on another thread */
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JSD_LOCK();
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hook = jsdc->functionHook;
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hookData = jsdc->functionHookData;
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JSD_UNLOCK();
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if (_callHook (jsdc, cx, fp, before,
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(before) ? JSD_HOOK_FUNCTION_CALL : JSD_HOOK_FUNCTION_RETURN,
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hook, hookData))
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{
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return closure;
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}
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return NULL;
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}
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void * JS_DLL_CALLBACK
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jsd_TopLevelCallHook(JSContext *cx, JSStackFrame *fp, JSBool before,
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JSBool *ok, void *closure)
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{
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JSDContext* jsdc;
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JSD_CallHookProc hook;
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void* hookData;
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jsdc = (JSDContext*) closure;
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/* local in case jsdc->toplevelHook gets cleared on another thread */
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JSD_LOCK();
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hook = jsdc->toplevelHook;
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hookData = jsdc->toplevelHookData;
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JSD_UNLOCK();
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if (_callHook (jsdc, cx, fp, before,
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(before) ? JSD_HOOK_TOPLEVEL_START : JSD_HOOK_TOPLEVEL_END,
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hook, hookData))
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{
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return closure;
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}
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return NULL;
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}
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