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68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=8 sts=4 et sw=4 tw=99:
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "vm/Probes-inl.h"
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#include "jscntxt.h"
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#ifdef INCLUDE_MOZILLA_DTRACE
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#include "jsscriptinlines.h"
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#endif
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#define TYPEOF(cx,v) (v.isNull() ? JSTYPE_NULL : JS_TypeOfValue(cx,v))
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using namespace js;
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const char probes::nullName[] = "(null)";
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const char probes::anonymousName[] = "(anonymous)";
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bool probes::ProfilingActive = true;
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#ifdef INCLUDE_MOZILLA_DTRACE
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static const char*
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ScriptFilename(const JSScript* script)
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{
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if (!script)
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return probes::nullName;
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if (!script->filename())
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return probes::anonymousName;
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return script->filename();
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}
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static const char*
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FunctionName(JSContext* cx, JSFunction* fun, JSAutoByteString* bytes)
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{
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if (!fun)
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return probes::nullName;
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if (!fun->displayAtom())
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return probes::anonymousName;
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return bytes->encodeLatin1(cx, fun->displayAtom()) ? bytes->ptr() : probes::nullName;
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}
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/*
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* These functions call the DTrace macros for the JavaScript USDT probes.
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* Originally this code was inlined in the JavaScript code; however since
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* a number of operations are called, these have been placed into functions
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* to reduce any negative compiler optimization effect that the addition of
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* a number of usually unused lines of code would cause.
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*/
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void
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probes::DTraceEnterJSFun(JSContext* cx, JSFunction* fun, JSScript* script)
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{
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JSAutoByteString funNameBytes;
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JAVASCRIPT_FUNCTION_ENTRY(ScriptFilename(script), probes::nullName,
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FunctionName(cx, fun, &funNameBytes));
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}
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void
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probes::DTraceExitJSFun(JSContext* cx, JSFunction* fun, JSScript* script)
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{
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JSAutoByteString funNameBytes;
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JAVASCRIPT_FUNCTION_RETURN(ScriptFilename(script), probes::nullName,
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FunctionName(cx, fun, &funNameBytes));
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}
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#endif
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