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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sw=4 et tw=80:
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* Copyright (C) 2007 Sun Microsystems, Inc. All Rights Reserved.
*
* Contributor(s):
* Brendan Eich <brendan@mozilla.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "jsapi.h"
#include "jsutil.h"
#include "jsatom.h"
#include "jscntxt.h"
#include "jsdbgapi.h"
#include "jsfun.h"
#include "jsinterp.h"
#include "jsobj.h"
#include "jsscript.h"
#include "jsstr.h"
#ifdef __APPLE__
#include "sharkctl.h"
#endif
#include "jsprobes.h"
#include <sys/types.h>
#define TYPEOF(cx,v) (JSVAL_IS_NULL(v) ? JSTYPE_NULL : JS_TypeOfValue(cx,v))
using namespace js;
const char Probes::nullName[] = "(null)";
const char *
Probes::FunctionClassname(const JSFunction *fun)
{
return (fun && !FUN_INTERPRETED(fun) && !(fun->flags & JSFUN_TRCINFO) && FUN_CLASP(fun))
? (char *)FUN_CLASP(fun)->name
: nullName;
}
const char *
Probes::ScriptFilename(JSScript *script)
{
return (script && script->filename) ? (char *)script->filename : nullName;
}
int
Probes::FunctionLineNumber(JSContext *cx, const JSFunction *fun)
{
if (fun && FUN_INTERPRETED(fun))
return (int) JS_GetScriptBaseLineNumber(cx, FUN_SCRIPT(fun));
return 0;
}
/*
* This function is used to convert function arguments and return value (jsval)
* into the following based on each value's type tag:
*
* jsval returned
* -------------------
* STRING -> void *
* INT -> int
* DOUBLE -> double *
* BOOLEAN -> int
* OBJECT -> void *
*
* All are presented as void * for DTrace consumers to use, after shifting or
* masking out the JavaScript type bits. This allows D scripts to use ints and
* booleans directly and copyinstr() for string arguments, when types are known
* beforehand.
*
* This is used by the function-args and function-rval probes, which also
* provide raw (unmasked) jsvals should type info be useful from D scripts.
*/
#if 0
static void *
jsprobes_jsvaltovoid(JSContext *cx, const js::Value &argval)
{
if (argval.isNull())
return (void *)JS_TYPE_STR(JSTYPE_NULL);
if (argval.isUndefined())
return (void *)JS_TYPE_STR(JSTYPE_VOID);
if (argval.isBoolean())
return (void *)argval.toBoolean();
if (argval.isNumber()) {
if (argval.isInt32())
return (void *)argval.toInt32();
// FIXME Now what?
//return (void *)argval.toDouble();
}
return argval.toGCThing();
}
#endif
const char *
Probes::FunctionName(JSContext *cx, const JSFunction *fun, JSAutoByteString *bytes)
{
if (!fun)
return nullName;
JSAtom *atom = fun->atom;
if (!atom) {
/*
* TODO: maybe do more work here to figure out the name of the property
* or variable that held the anonymous function that we're calling, if anyone
* cares; an easy workaround is to just give your anonymous functions names.
*/
return nullName;
}
return bytes->encode(cx, ATOM_TO_STRING(atom)) ? bytes->ptr() : nullName;
}
#ifdef INCLUDE_MOZILLA_DTRACE
/*
* These functions call the DTrace macros for the JavaScript USDT probes.
* Originally this code was inlined in the JavaScript code; however since
* a number of operations are called, these have been placed into functions
* to reduce any negative compiler optimization effect that the addition of
* a number of usually unused lines of code would cause.
*/
void
Probes::enterJSFunImpl(JSContext *cx, JSFunction *fun, JSScript *script)
{
JSAutoByteString funNameBytes;
JAVASCRIPT_FUNCTION_ENTRY(ScriptFilename(script), FunctionClassname(fun),
FunctionName(cx, fun, &funNameBytes));
}
void
Probes::handleFunctionReturn(JSContext *cx, JSFunction *fun, JSScript *script)
{
JSAutoByteString funNameBytes;
JAVASCRIPT_FUNCTION_RETURN(ScriptFilename(script), FunctionClassname(fun),
FunctionName(cx, fun, &funNameBytes));
}
#endif
bool
Probes::startProfiling()
{
#ifdef MOZ_SHARK
if (Shark::Start())
return true;
#endif
return false;
}
void
Probes::stopProfiling()
{
#ifdef MOZ_SHARK
Shark::Stop();
#endif
}
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