1 /* 2 * Copyright 2016 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkATrace_DEFINED 9 #define SkATrace_DEFINED 10 11 #include "SkEventTracer.h" 12 13 /** 14 * This class is used to support ATrace in android apps. It hooks into the SkEventTracer system. It 15 * currently supports the macros TRACE_EVENT*, TRACE_EVENT_INSTANT*, and TRANCE_EVENT_BEGIN/END*. 16 * For versions of these calls that take additoinal args and value pairs we currently just drop them 17 * and report only the name. Since ATrace is a simple push and pop system (all traces are fully 18 * nested), if using BEGIN and END you should also make sure your calls are properly nested (i.e. if 19 * startA is before startB, then endB is before endA). 20 */ 21 class SkATrace : public SkEventTracer { 22 public: 23 SkATrace(); 24 25 SkEventTracer::Handle addTraceEvent(char phase, 26 const uint8_t* categoryEnabledFlag, 27 const char* name, 28 uint64_t id, 29 int numArgs, 30 const char** argNames, 31 const uint8_t* argTypes, 32 const uint64_t* argValues, 33 uint8_t flags) override; 34 35 36 void updateTraceEventDuration(const uint8_t* categoryEnabledFlag, 37 const char* name, 38 SkEventTracer::Handle handle) override; 39 40 const uint8_t* getCategoryGroupEnabled(const char* name) override; 41 42 const char* getCategoryGroupName(const uint8_t* categoryEnabledFlag) override { 43 static const char* category = "skiaATrace"; 44 return category; 45 } 46 47 private: 48 void (*fBeginSection)(const char*); 49 void (*fEndSection)(void); 50 bool (*fIsEnabled)(void); 51 }; 52 53 54 #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK 55 56 #include <utils/Trace.h> 57 #define ATRACE_ANDROID_FRAMEWORK(fmt, ...) SkAndroidTraceUtil __trace = \ 58 (SkAndroidTraceUtil::atraceFormatBegin(fmt, ##__VA_ARGS__), SkAndroidTraceUtil()) 59 60 class SkAndroidTraceUtil { 61 public: 62 ~SkAndroidTraceUtil() { ATRACE_END(); } 63 64 static void atraceFormatBegin(const char* fmt, ...) { 65 if (CC_LIKELY(!ATRACE_ENABLED())) return; 66 67 const int BUFFER_SIZE = 256; 68 va_list ap; 69 char buf[BUFFER_SIZE]; 70 71 va_start(ap, fmt); 72 vsnprintf(buf, BUFFER_SIZE, fmt, ap); 73 va_end(ap); 74 75 ATRACE_BEGIN(buf); 76 } 77 }; 78 79 #else 80 #define ATRACE_ANDROID_FRAMEWORK(fmt, ...) 81 #endif // SK_BUILD_FOR_ANDROID_FRAMEWORK 82 83 #endif 84 85
