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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkATrace.h"
#include "SkTraceEvent.h"
#ifdef SK_BUILD_FOR_ANDROID
#include <dlfcn.h>
#endif
SkATrace::SkATrace() : fBeginSection(nullptr), fEndSection(nullptr), fIsEnabled(nullptr) {
#if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK)
fIsEnabled = []{ return static_cast<bool>(CC_UNLIKELY(ATRACE_ENABLED())); };
fBeginSection = [](const char* name){ ATRACE_BEGIN(name); };
fEndSection = []{ ATRACE_END(); };
#elif defined(SK_BUILD_FOR_ANDROID)
if (void* lib = dlopen("libandroid.so", RTLD_NOW | RTLD_LOCAL)) {
fBeginSection = (decltype(fBeginSection))dlsym(lib, "ATrace_beginSection");
fEndSection = (decltype(fEndSection))dlsym(lib, "ATrace_endSection");
fIsEnabled = (decltype(fIsEnabled))dlsym(lib, "ATrace_isEnabled");
}
#endif
if (!fIsEnabled) {
fIsEnabled = []{ return false; };
}
}
SkEventTracer::Handle SkATrace::addTraceEvent(char phase,
const uint8_t* categoryEnabledFlag,
const char* name,
uint64_t id,
int numArgs,
const char** argNames,
const uint8_t* argTypes,
const uint64_t* argValues,
uint8_t flags) {
if (fIsEnabled()) {
if (TRACE_EVENT_PHASE_COMPLETE == phase ||
TRACE_EVENT_PHASE_INSTANT == phase) {
fBeginSection(name);
}
if (TRACE_EVENT_PHASE_INSTANT == phase) {
fEndSection();
}
}
return 0;
}
void SkATrace::updateTraceEventDuration(const uint8_t* categoryEnabledFlag,
const char* name,
SkEventTracer::Handle handle) {
// This is only ever called from a scoped trace event so we will just end the ATrace section.
if (fIsEnabled()) {
fEndSection();
}
}
const uint8_t* SkATrace::getCategoryGroupEnabled(const char* name) {
// Chrome tracing is setup to not repeatly call this function once it has been initialized. So
// we can't use this to do a check for ATrace isEnabled(). Thus we will always return yes here
// and then check to see if ATrace is enabled when beginning and ending a section.
static uint8_t yes = SkEventTracer::kEnabledForRecording_CategoryGroupEnabledFlags;
return &yes;
}
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