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 #if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) 18 fIsEnabled = []{ return static_cast<bool>(CC_UNLIKELY(ATRACE_ENABLED())); }; 19 fBeginSection = [](const char* name){ ATRACE_BEGIN(name); }; 20 fEndSection = []{ ATRACE_END(); }; 21 #elif defined(SK_BUILD_FOR_ANDROID) 22 if (void* lib = dlopen("libandroid.so", RTLD_NOW | RTLD_LOCAL)) { 23 fBeginSection = (decltype(fBeginSection))dlsym(lib, "ATrace_beginSection"); 24 fEndSection = (decltype(fEndSection))dlsym(lib, "ATrace_endSection"); 25 fIsEnabled = (decltype(fIsEnabled))dlsym(lib, "ATrace_isEnabled"); 26 } 27 #endif 28 29 if (!fIsEnabled) { 30 fIsEnabled = []{ return false; }; 31 } 32 } 33 34 SkEventTracer::Handle SkATrace::addTraceEvent(char phase, 35 const uint8_t* categoryEnabledFlag, 36 const char* name, 37 uint64_t id, 38 int numArgs, 39 const char** argNames, 40 const uint8_t* argTypes, 41 const uint64_t* argValues, 42 uint8_t flags) { 43 if (fIsEnabled()) { 44 if (TRACE_EVENT_PHASE_COMPLETE == phase || 45 TRACE_EVENT_PHASE_INSTANT == phase) { 46 fBeginSection(name); 47 } 48 49 if (TRACE_EVENT_PHASE_INSTANT == phase) { 50 fEndSection(); 51 } 52 } 53 return 0; 54 } 55 56 void SkATrace::updateTraceEventDuration(const uint8_t* categoryEnabledFlag, 57 const char* name, 58 SkEventTracer::Handle handle) { 59 // This is only ever called from a scoped trace event so we will just end the ATrace section. 60 if (fIsEnabled()) { 61 fEndSection(); 62 } 63 } 64 65 const uint8_t* SkATrace::getCategoryGroupEnabled(const char* name) { 66 // Chrome tracing is setup to not repeatly call this function once it has been initialized. So 67 // we can't use this to do a check for ATrace isEnabled(). Thus we will always return yes here 68 // and then check to see if ATrace is enabled when beginning and ending a section. 69 static uint8_t yes = SkEventTracer::kEnabledForRecording_CategoryGroupEnabledFlags; 70 return &yes; 71 } 72 73
