Quelle ETWTools.cpp Sprache: C

/* -*- Mode: C++; tab-width: 8; 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/. */

#include "ETWTools.h"

#include <atomic>

namespace ETW {
std::atomic<ULONGLONG> gETWCollectionMask = 0;

// Define a handle to a TraceLogging provider.
//
// > All ETW providers are identified by both provider name and provider ID.
// > [...]
// > Microsoft recommends generating the provider ID from the provider name
// > using the ETW name-hashing algorithm described below. This provides
// > several benefits: it's easier to remember just the name; the ID and the
// > name are automatically linked; tools such as tracelog, traceview,
// > EventSource, and WPR have special support for providers that use IDs
// > generated using this algorithm.
//
// https://learn.microsoft.com/en-us/windows/win32/api/traceloggingprovider/nf-traceloggingprovider-tracelogging_define_provider
//
// The GUID generated for "Mozilla.FirefoxTraceLogger" is:
// {c923f508-96e4-5515-e32c-7539d1b10504}
TRACELOGGING_DEFINE_PROVIDER(kFirefoxTraceLoggingProvider,
                             "Mozilla.FirefoxTraceLogger",
                             (0xc923f508, 0x96e4, 0x5515, 0xe3, 0x2c, 0x75,
                              0x39, 0xd1, 0xb1, 0x05, 0x04));

static void NTAPI ETWEnableCallback(LPCGUID aSourceId, ULONG aIsEnabled,
                                    UCHAR aLevel, ULONGLONG aMatchAnyKeyword,
                                    ULONGLONG aMatchAllKeyword,
                                    PEVENT_FILTER_DESCRIPTOR aFilterData,
                                    PVOID aCallbackContext) {
  // This is called on a CRT worker thread. This means this might race a bit
  // with our main thread, but that is okay.
  if (aIsEnabled) {
    mozilla::profiler::detail::RacyFeatures::SetETWCollectionActive();
  } else {
    mozilla::profiler::detail::RacyFeatures::SetETWCollectionInactive();
  }
  // The lower 48 bits of the provider flags are used to mask markers.
  gETWCollectionMask = aMatchAnyKeyword;
}

void Init() {
  TraceLoggingRegisterEx(kFirefoxTraceLoggingProvider, ETWEnableCallback,
                         nullptr);
}

void Shutdown() { TraceLoggingUnregister(kFirefoxTraceLoggingProvider); }

}  // namespace ETW

quality96%

¤ Dauer der Verarbeitung: 0.13 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.