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
SkATrace()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
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)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
updateTraceEventDuration(const uint8_t * categoryEnabledFlag,const char * name,SkEventTracer::Handle handle)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
getCategoryGroupEnabled(const char * name)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