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