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 #include "SkATrace.h" 9 10 #include "SkTraceEvent.h" 11 12 #ifdef SK_BUILD_FOR_ANDROID 13 #include <dlfcn.h> 14 #endif 15 16 SkATrace::SkATrace() : fBeginSection(nullptr), fEndSection(nullptr), fIsEnabled(nullptr) { 17 #ifdef SK_BUILD_FOR_ANDROID 18 if (void* lib = dlopen("libandroid.so", RTLD_NOW | RTLD_LOCAL)) { 19 fBeginSection = (decltype(fBeginSection))dlsym(lib, "ATrace_beginSection"); 20 fEndSection = (decltype(fEndSection))dlsym(lib, "ATrace_endSection"); 21 fIsEnabled = (decltype(fIsEnabled))dlsym(lib, "ATrace_isEnabled"); 22 } 23 #endif 24 if (!fIsEnabled) { 25 fIsEnabled = []{ return false; }; 26 } 27 } 28 29 SkEventTracer::Handle SkATrace::addTraceEvent(char phase, 30 const uint8_t* categoryEnabledFlag, 31 const char* name, 32 uint64_t id, 33 int numArgs, 34 const char** argNames, 35 const uint8_t* argTypes, 36 const uint64_t* argValues, 37 uint8_t flags) { 38 if (fIsEnabled()) { 39 if (TRACE_EVENT_PHASE_COMPLETE == phase || 40 TRACE_EVENT_PHASE_BEGIN == phase || 41 TRACE_EVENT_PHASE_INSTANT == phase) { 42 fBeginSection(name); 43 } 44 45 if (TRACE_EVENT_PHASE_END == phase || 46 TRACE_EVENT_PHASE_INSTANT == phase) { 47 fEndSection(); 48 } 49 } 50 return 0; 51 } 52 53 void SkATrace::updateTraceEventDuration(const uint8_t* categoryEnabledFlag, 54 const char* name, 55 SkEventTracer::Handle handle) { 56 // This is only ever called from a scoped trace event so we will just end the ATrace section. 57 if (fIsEnabled()) { 58 fEndSection(); 59 } 60 } 61 62 const uint8_t* SkATrace::getCategoryGroupEnabled(const char* name) { 63 // Chrome tracing is setup to not repeatly call this function once it has been initialized. So 64 // we can't use this to do a check for ATrace isEnabled(). Thus we will always return yes here 65 // and then check to see if ATrace is enabled when beginning and ending a section. 66 static uint8_t yes = SkEventTracer::kEnabledForRecording_CategoryGroupEnabledFlags; 67 return &yes; 68 } 69 70
