Use chromium trace_event implementation in blink

third_party/WebKit/Source/platform/EventTracer.cpp

-/*
- * Copyright (C) 2011 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "platform/EventTracer.h"
-
-#include "base/time/time.h"
-#include "base/trace_event/trace_event.h"
-#include "base/trace_event/trace_event_argument.h"
-#include "platform/TracedValue.h"
-#include "public/platform/Platform.h"
-#include "wtf/Assertions.h"
-#include "wtf/text/StringUTF8Adaptor.h"
-#include <memory>
-#include <stdio.h>
-
-namespace blink {
-
-static_assert(sizeof(TraceEvent::TraceEventHandle) == sizeof(base::trace_event::TraceEventHandle), "TraceEventHandle types must be the same");
-static_assert(sizeof(TraceEvent::TraceEventAPIAtomicWord) == sizeof(const char*), "TraceEventAPIAtomicWord must be pointer-sized.");
-
-// The dummy variable is needed to avoid a crash when someone updates the state variables
-// before EventTracer::initialize() is called.
-TraceEvent::TraceEventAPIAtomicWord dummyTraceSamplingState = 0;
-TraceEvent::TraceEventAPIAtomicWord* traceSamplingState[3] = {&dummyTraceSamplingState, &dummyTraceSamplingState, &dummyTraceSamplingState };
-
-void EventTracer::initialize()
-{
-    traceSamplingState[0] = reinterpret_cast<TraceEvent::TraceEventAPIAtomicWord*>(&TRACE_EVENT_API_THREAD_BUCKET(0));
-    // FIXME: traceSamplingState[0] can be 0 in split-dll build. http://crbug.com/256965
-    if (!traceSamplingState[0])
-        traceSamplingState[0] = &dummyTraceSamplingState;
-    traceSamplingState[1] = reinterpret_cast<TraceEvent::TraceEventAPIAtomicWord*>(&TRACE_EVENT_API_THREAD_BUCKET(1));
-    if (!traceSamplingState[1])
-        traceSamplingState[1] = &dummyTraceSamplingState;
-    traceSamplingState[2] = reinterpret_cast<TraceEvent::TraceEventAPIAtomicWord*>(&TRACE_EVENT_API_THREAD_BUCKET(2));
-    if (!traceSamplingState[2])
-        traceSamplingState[2] = &dummyTraceSamplingState;
-}
-
-const unsigned char* EventTracer::getTraceCategoryEnabledFlag(const char* categoryName)
-{
-    return TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(categoryName);
-}
-
-TraceEvent::TraceEventHandle EventTracer::addTraceEvent(char phase, const unsigned char* categoryEnabledFlag,
-    const char* name, const char* scope, unsigned long long id, unsigned long long bindId, double timestamp,
-    int numArgs, const char* argNames[], const unsigned char argTypes[],
-    const unsigned long long argValues[],
-    std::unique_ptr<TracedValue> tracedValue1,
-    std::unique_ptr<TracedValue> tracedValue2,
-    unsigned flags)
-{
-    std::unique_ptr<base::trace_event::ConvertableToTraceFormat> convertables[2];
-    ASSERT(numArgs <= 2);
-    // We move m_tracedValues from TracedValues for thread safety.
-    // https://crbug.com/478149
-    if (numArgs >= 1 && argTypes[0] == TRACE_VALUE_TYPE_CONVERTABLE)
-        convertables[0] = std::move(tracedValue1->m_tracedValue);
-    if (numArgs >= 2 && argTypes[1] == TRACE_VALUE_TYPE_CONVERTABLE)
-        convertables[1] = std::move(tracedValue2->m_tracedValue);
-    return addTraceEvent(phase, categoryEnabledFlag, name, scope, id, bindId, timestamp, numArgs, argNames, argTypes, argValues, convertables, flags);
-}
-
-TraceEvent::TraceEventHandle EventTracer::addTraceEvent(char phase, const unsigned char* categoryEnabledFlag,
-    const char* name, const char* scope, unsigned long long id, unsigned long long bindId, double timestamp,
-    int numArgs, const char** argNames, const unsigned char* argTypes,
-    const unsigned long long* argValues, unsigned flags)
-{
-    return addTraceEvent(phase, categoryEnabledFlag, name, scope, id, bindId, timestamp, numArgs, argNames, argTypes, argValues, nullptr, flags);
-}
-
-TraceEvent::TraceEventHandle EventTracer::addTraceEvent(char phase, const unsigned char* categoryEnabledFlag,
-    const char* name, const char* scope, unsigned long long id, unsigned long long bindId, double timestamp,
-    int numArgs, const char** argNames, const unsigned char* argTypes, const unsigned long long* argValues,
-    std::unique_ptr<base::trace_event::ConvertableToTraceFormat>* convertables, unsigned flags)
-{
-    base::TimeTicks timestampTimeTicks = base::TimeTicks() + base::TimeDelta::FromSecondsD(timestamp);
-    base::trace_event::TraceEventHandle handle = TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(phase, categoryEnabledFlag, name, scope, id, bindId, base::PlatformThread::CurrentId(), timestampTimeTicks, numArgs, argNames, argTypes, argValues, convertables, flags);
-    TraceEvent::TraceEventHandle result;
-    memcpy(&result, &handle, sizeof(result));
-    return result;
-}
-
-void EventTracer::updateTraceEventDuration(const unsigned char* categoryEnabledFlag, const char* name, TraceEvent::TraceEventHandle handle)
-{
-    base::trace_event::TraceEventHandle traceEventHandle;
-    memcpy(&traceEventHandle, &handle, sizeof(handle));
-    TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION(categoryEnabledFlag, name, traceEventHandle);
-}
-
-double EventTracer::systemTraceTime()
-{
-    return (base::TimeTicks::Now() - base::TimeTicks()).InSecondsF();
-}
-
-} // namespace blink