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 #ifndef EventTracer_h 32 #define EventTracer_h 33 34 #include "platform/PlatformExport.h" 35 #include "wtf/RefCounted.h" 36 #include "wtf/RefPtr.h" 37 #include "wtf/text/WTFString.h" 38 39 #include <stdint.h> 40 41 // This will mark the trace event as disabled by default. The user will need 42 // to explicitly enable the event. 43 #define TRACE_DISABLED_BY_DEFAULT(name) "disabled-by-default-" name 44 45 namespace WebCore { 46 47 namespace TraceEvent { 48 typedef uint64_t TraceEventHandle; 49 50 class PLATFORM_EXPORT ConvertableToTraceFormat : public RefCounted<ConvertableToTraceFormat> { 51 public: 52 virtual String asTraceFormat() const = 0; 53 virtual ~ConvertableToTraceFormat() { } 54 }; 55 56 } 57 58 // FIXME: Make these global variables thread-safe. Make a value update atomic. 59 PLATFORM_EXPORT extern long* traceSamplingState[3]; 60 61 class PLATFORM_EXPORT EventTracer { 62 public: 63 static void initialize(); 64 static const unsigned char* getTraceCategoryEnabledFlag(const char*); 65 static TraceEvent::TraceEventHandle addTraceEvent(char phase, 66 const unsigned char* categoryEnabledFlag, 67 const char* name, 68 unsigned long long id, 69 int numArgs, 70 const char* argNames[], 71 const unsigned char argTypes[], 72 const unsigned long long argValues[], 73 WebCore::TraceEvent::ConvertableToTraceFormat*[], 74 unsigned char flags); 75 static TraceEvent::TraceEventHandle addTraceEvent(char phase, 76 const unsigned char* categoryEnabledFlag, 77 const char* name, 78 unsigned long long id, 79 int numArgs, 80 const char* argNames[], 81 const unsigned char argTypes[], 82 const unsigned long long argValues[], 83 unsigned char flags); 84 static void updateTraceEventDuration(const unsigned char* categoryEnabledFlag, const char* name, TraceEvent::TraceEventHandle); 85 }; 86 87 } // namespace WebCore 88 89 #endif // EventTracer_h 90
