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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef VTuneProfiler_h
#define VTuneProfiler_h
// The intent here is to add 0 overhead for regular users. In order to build
// the VTune profiler code at all --enable-vtune-instrumentation needs to be
// set as a build option. Even then, when none of the environment variables
// is specified that allow us to find the ittnotify DLL, these functions
// should be minimal overhead. When starting Firefox under VTune, these
// env vars will be automatically defined, otherwise INTEL_LIBITTNOTIFY32/64
// should be set to point at the ittnotify DLL.
#ifndef MOZ_VTUNE_INSTRUMENTATION
# define VTUNE_INIT()
# define VTUNE_SHUTDOWN()
# define VTUNE_TRACING(name, kind)
# define VTUNE_REGISTER_THREAD(name)
#else
# include "GeckoProfiler.h"
// This is the regular Intel header, these functions are actually defined for
// us inside js/src/vtune by an intel C file which actually dynamically resolves
// them to the correct DLL. Through libxul these will 'magically' resolve.
# include "vtune/ittnotify.h"
# include <stddef.h>
# include <unordered_map>
# include <string>
class VTuneProfiler {
public:
static void Initialize();
static void Shutdown();
enum TracingKind {
TRACING_EVENT,
TRACING_INTERVAL_START,
TRACING_INTERVAL_END,
};
static void Trace(const char* aName, TracingKind aKind) {
if (mInstance) {
mInstance->TraceInternal(aName, aKind);
}
}
static void RegisterThread(const char* aName) {
if (mInstance) {
mInstance->RegisterThreadInternal(aName);
}
}
private:
void TraceInternal(const char* aName, TracingKind aKind);
void RegisterThreadInternal(const char* aName);
// This is null when the ittnotify DLL could not be found.
static VTuneProfiler* mInstance;
std::unordered_map<std::string, __itt_event> mStrings;
};
# define VTUNE_INIT() VTuneProfiler::Initialize()
# define VTUNE_SHUTDOWN() VTuneProfiler::Shutdown()
# define VTUNE_TRACING(name, kind) VTuneProfiler::Trace(name, kind)
# define VTUNE_REGISTER_THREAD(name) VTuneProfiler::RegisterThread(name)
#endif
#endif /* VTuneProfiler_h */
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