1/*
2 * Copyright (C) 2011 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "platform/EventTracer.h"
33
34#include "public/platform/Platform.h"
35#include "public/platform/WebConvertableToTraceFormat.h"
36#include "wtf/Assertions.h"
37#include <stdio.h>
38
39namespace blink {
40
41COMPILE_ASSERT(sizeof(blink::Platform::TraceEventHandle) == sizeof(TraceEvent::TraceEventHandle), TraceEventHandle_types_must_be_compatible);
42
43// The dummy variable is needed to avoid a crash when someone updates the state variables
44// before EventTracer::initialize() is called.
45long dummyTraceSamplingState = 0;
46long* traceSamplingState[3] = {&dummyTraceSamplingState, &dummyTraceSamplingState, &dummyTraceSamplingState };
47
48void EventTracer::initialize()
49{
50    // current() might not exist in unit tests.
51    if (!blink::Platform::current())
52        return;
53
54    traceSamplingState[0] = blink::Platform::current()->getTraceSamplingState(0);
55    // FIXME: traceSamplingState[0] can be 0 in split-dll build. http://crbug.com/256965
56    if (!traceSamplingState[0])
57        traceSamplingState[0] = &dummyTraceSamplingState;
58    traceSamplingState[1] = blink::Platform::current()->getTraceSamplingState(1);
59    if (!traceSamplingState[1])
60        traceSamplingState[1] = &dummyTraceSamplingState;
61    traceSamplingState[2] = blink::Platform::current()->getTraceSamplingState(2);
62    if (!traceSamplingState[2])
63        traceSamplingState[2] = &dummyTraceSamplingState;
64}
65
66const unsigned char* EventTracer::getTraceCategoryEnabledFlag(const char* categoryName)
67{
68    static const char* dummyCategoryEnabledFlag = "*";
69    // current() might not exist in unit tests.
70    if (!blink::Platform::current())
71        return reinterpret_cast<const unsigned char*>(dummyCategoryEnabledFlag);
72
73    return blink::Platform::current()->getTraceCategoryEnabledFlag(categoryName);
74}
75
76TraceEvent::TraceEventHandle EventTracer::addTraceEvent(char phase, const unsigned char* categoryEnabledFlag,
77    const char* name, unsigned long long id, int numArgs, const char* argNames[],
78    const unsigned char argTypes[], const unsigned long long argValues[],
79    TraceEvent::ConvertableToTraceFormat* convertableValues[],
80    unsigned char flags)
81{
82    blink::WebConvertableToTraceFormat webConvertableValues[2];
83    if (numArgs <= static_cast<int>(WTF_ARRAY_LENGTH(webConvertableValues))) {
84        for (int i = 0; i < numArgs; ++i) {
85            if (convertableValues[i])
86                webConvertableValues[i] = blink::WebConvertableToTraceFormat(convertableValues[i]);
87        }
88    } else {
89        ASSERT_NOT_REACHED();
90    }
91    return blink::Platform::current()->addTraceEvent(phase, categoryEnabledFlag, name, id, numArgs, argNames, argTypes, argValues, webConvertableValues, flags);
92}
93
94TraceEvent::TraceEventHandle EventTracer::addTraceEvent(char phase, const unsigned char* categoryEnabledFlag,
95    const char* name, unsigned long long id, int numArgs, const char** argNames,
96    const unsigned char* argTypes, const unsigned long long* argValues,
97    unsigned char flags)
98{
99    return blink::Platform::current()->addTraceEvent(phase, categoryEnabledFlag, name, id, numArgs, argNames, argTypes, argValues, 0, flags);
100}
101
102void EventTracer::updateTraceEventDuration(const unsigned char* categoryEnabledFlag, const char* name, TraceEvent::TraceEventHandle handle)
103{
104    blink::Platform::current()->updateTraceEventDuration(categoryEnabledFlag, name, handle);
105}
106
107} // namespace blink
108