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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 
39 namespace blink {
40 
41 COMPILE_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.
45 long dummyTraceSamplingState = 0;
46 long* traceSamplingState[3] = {&dummyTraceSamplingState, &dummyTraceSamplingState, &dummyTraceSamplingState };
47 
initialize()48 void 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 
getTraceCategoryEnabledFlag(const char * categoryName)66 const 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 
addTraceEvent(char phase,const unsigned char * categoryEnabledFlag,const char * name,unsigned long long id,int numArgs,const char * argNames[],const unsigned char argTypes[],const unsigned long long argValues[],TraceEvent::ConvertableToTraceFormat * convertableValues[],unsigned char flags)76 TraceEvent::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 
addTraceEvent(char phase,const unsigned char * categoryEnabledFlag,const char * name,unsigned long long id,int numArgs,const char ** argNames,const unsigned char * argTypes,const unsigned long long * argValues,unsigned char flags)94 TraceEvent::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 
updateTraceEventDuration(const unsigned char * categoryEnabledFlag,const char * name,TraceEvent::TraceEventHandle handle)102 void 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