9b86955c65
Introduce SkAutoMutexExclusive for SkMutex RAII. Unsubclass SkMutex from SkBaseMutex to allow annotations for class field mutexes separate from global mutexes. Leave SkAutoMutexAcquire for handling global mutexes using SkBaseMutex. Test using GrSingleOwner.h. Change-Id: I19d9d0ae0d05206cbb6ef137dc362969048c9c07 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/213136 Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: Herb Derby <herb@google.com>
89 lines
3.1 KiB
C++
89 lines
3.1 KiB
C++
/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "tools/trace/EventTracingPriv.h"
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#include "include/utils/SkEventTracer.h"
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#include "src/core/SkATrace.h"
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#include "src/core/SkTraceEvent.h"
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#include "tools/flags/CommandLineFlags.h"
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#include "tools/trace/ChromeTracingTracer.h"
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#include "tools/trace/SkDebugfTracer.h"
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static DEFINE_string(trace,
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"",
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"Log trace events in one of several modes:\n"
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" debugf : Show events using SkDebugf\n"
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" atrace : Send events to Android ATrace\n"
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" <filename> : Any other string is interpreted as a filename. Writes\n"
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" trace events to specified file as JSON, for viewing\n"
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" with chrome://tracing");
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static DEFINE_string(traceMatch,
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"",
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"Filter which categories are traced.\n"
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"Uses same format as --match\n");
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void initializeEventTracingForTools(const char* traceFlag) {
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if (!traceFlag) {
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if (FLAGS_trace.isEmpty()) {
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return;
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}
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traceFlag = FLAGS_trace[0];
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}
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SkEventTracer* eventTracer = nullptr;
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if (0 == strcmp(traceFlag, "atrace")) {
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eventTracer = new SkATrace();
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} else if (0 == strcmp(traceFlag, "debugf")) {
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eventTracer = new SkDebugfTracer();
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} else {
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eventTracer = new ChromeTracingTracer(traceFlag);
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}
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SkAssertResult(SkEventTracer::SetInstance(eventTracer));
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}
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uint8_t* SkEventTracingCategories::getCategoryGroupEnabled(const char* name) {
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static_assert(0 == offsetof(CategoryState, fEnabled), "CategoryState");
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// We ignore the "disabled-by-default-" prefix in our internal tools
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if (SkStrStartsWith(name, TRACE_CATEGORY_PREFIX)) {
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name += strlen(TRACE_CATEGORY_PREFIX);
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}
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// Chrome's implementation of this API does a two-phase lookup (once without a lock, then again
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// with a lock. But the tracing macros avoid calling these functions more than once per site,
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// so just do something simple (and easier to reason about):
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SkAutoMutexExclusive lock(fMutex);
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for (int i = 0; i < fNumCategories; ++i) {
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if (0 == strcmp(name, fCategories[i].fName)) {
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return reinterpret_cast<uint8_t*>(&fCategories[i]);
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}
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}
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if (fNumCategories >= kMaxCategories) {
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SkDEBUGFAIL("Exhausted event tracing categories. Increase kMaxCategories.");
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return reinterpret_cast<uint8_t*>(&fCategories[0]);
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}
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fCategories[fNumCategories].fEnabled =
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CommandLineFlags::ShouldSkip(FLAGS_traceMatch, name)
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? 0
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: SkEventTracer::kEnabledForRecording_CategoryGroupEnabledFlags;
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fCategories[fNumCategories].fName = name;
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return reinterpret_cast<uint8_t*>(&fCategories[fNumCategories++]);
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}
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const char* SkEventTracingCategories::getCategoryGroupName(const uint8_t* categoryEnabledFlag) {
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if (categoryEnabledFlag) {
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return reinterpret_cast<const CategoryState*>(categoryEnabledFlag)->fName;
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}
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return nullptr;
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}
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