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