1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/vm/Probes.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,85 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * vim: set ts=8 sts=4 et sw=4 tw=99:
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#include "vm/Probes-inl.h"
1.11 +
1.12 +#include "jscntxt.h"
1.13 +
1.14 +#ifdef INCLUDE_MOZILLA_DTRACE
1.15 +#include "jsscriptinlines.h"
1.16 +#endif
1.17 +
1.18 +#define TYPEOF(cx,v) (JSVAL_IS_NULL(v) ? JSTYPE_NULL : JS_TypeOfValue(cx,v))
1.19 +
1.20 +using namespace js;
1.21 +
1.22 +const char probes::nullName[] = "(null)";
1.23 +const char probes::anonymousName[] = "(anonymous)";
1.24 +
1.25 +bool probes::ProfilingActive = true;
1.26 +
1.27 +probes::JITReportGranularity
1.28 +probes::JITGranularityRequested(JSContext *cx)
1.29 +{
1.30 + if (cx->runtime()->spsProfiler.enabled())
1.31 + return JITREPORT_GRANULARITY_LINE;
1.32 + return JITREPORT_GRANULARITY_NONE;
1.33 +}
1.34 +
1.35 +/* ICs are unregistered in a batch */
1.36 +void
1.37 +probes::DiscardExecutableRegion(void *start, size_t size)
1.38 +{
1.39 + /*
1.40 + * Not needed for SPS because ICs are disposed of when the normal JITChunk
1.41 + * is disposed of
1.42 + */
1.43 +}
1.44 +
1.45 +#ifdef INCLUDE_MOZILLA_DTRACE
1.46 +static const char *
1.47 +ScriptFilename(const JSScript *script)
1.48 +{
1.49 + if (!script)
1.50 + return probes::nullName;
1.51 + if (!script->filename())
1.52 + return probes::anonymousName;
1.53 + return script->filename();
1.54 +}
1.55 +
1.56 +static const char *
1.57 +FunctionName(JSContext *cx, JSFunction *fun, JSAutoByteString* bytes)
1.58 +{
1.59 + if (!fun)
1.60 + return probes::nullName;
1.61 + if (!fun->displayAtom())
1.62 + return probes::anonymousName;
1.63 + return bytes->encodeLatin1(cx, fun->displayAtom()) ? bytes->ptr() : probes::nullName;
1.64 +}
1.65 +
1.66 +/*
1.67 + * These functions call the DTrace macros for the JavaScript USDT probes.
1.68 + * Originally this code was inlined in the JavaScript code; however since
1.69 + * a number of operations are called, these have been placed into functions
1.70 + * to reduce any negative compiler optimization effect that the addition of
1.71 + * a number of usually unused lines of code would cause.
1.72 + */
1.73 +void
1.74 +probes::DTraceEnterJSFun(JSContext *cx, JSFunction *fun, JSScript *script)
1.75 +{
1.76 + JSAutoByteString funNameBytes;
1.77 + JAVASCRIPT_FUNCTION_ENTRY(ScriptFilename(script), probes::nullName,
1.78 + FunctionName(cx, fun, &funNameBytes));
1.79 +}
1.80 +
1.81 +void
1.82 +probes::DTraceExitJSFun(JSContext *cx, JSFunction *fun, JSScript *script)
1.83 +{
1.84 + JSAutoByteString funNameBytes;
1.85 + JAVASCRIPT_FUNCTION_RETURN(ScriptFilename(script), probes::nullName,
1.86 + FunctionName(cx, fun, &funNameBytes));
1.87 +}
1.88 +#endif
