114 lines
4.3 KiB
C++
114 lines
4.3 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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// SkPerfettoTrace is only relevant when Perfetto is requested, and for in-process tracing. It is
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// incompatible with the alternate "direct macro override" approach to using Perfetto, which is
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// currently used for SK_BUILD_FOR_ANDROID_FRAMEWORK. Skia's Perfetto integration is currently in
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// in a transitionary period, see go/skia-perfetto for details.
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#if defined(SK_USE_PERFETTO)
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#if defined(SK_ANDROID_FRAMEWORK_USE_PERFETTO)
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#error "SK_USE_PERFETTO and SK_ANDROID_FRAMEWORK_USE_PERFETTO are mutually exclusive"
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#endif
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#include "tools/trace/SkPerfettoTrace.h"
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#endif
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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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" perfetto : Send events to Perfetto (Linux, Android, and Mac only)\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 if (0 == strcmp(traceFlag, "perfetto")) {
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#if defined(SK_USE_PERFETTO)
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eventTracer = new SkPerfettoTrace();
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#else
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// TODO(b/259248961): update this explanation (and associated docs) as the Perfetto
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// transition progresses.
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SkDebugf("Perfetto is not enabled (SK_USE_PERFETTO is false). Perfetto tracing will not "
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"be performed.\nTracing tools with Perfetto is only enabled for Linux, Android, "
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"and Mac.\n");
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return;
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#endif
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}
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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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