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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_TEST_BASE_TRACING_H_
#define CHROME_TEST_BASE_TRACING_H_
#include <string>
#include "base/functional/callback_forward.h"
namespace base {
namespace trace_event {
class TraceConfig;
}
} // namespace base
namespace tracing {
// Called from UI thread.
// Begin tracing specified category_patterns on the browser.
// |category_patterns| is a comma-delimited list of category wildcards.
// A category pattern can have an optional '-' prefix to make categories with
// matching categorys excluded. Either all category_patterns must be included
// or all must be excluded.
//
// Example: BeginTracing("test_MyTest*");
// Example: BeginTracing("test_MyTest*,test_OtherStuff");
// Example: BeginTracing("-excluded_category1,-excluded_category2");
//
// See base/trace_event/trace_event.h for documentation of included and excluded
// category_patterns.
[[nodiscard]] bool BeginTracing(const std::string& category_patterns);
// Called from UI thread.
// Begin tracing specified category_patterns on the browser.
// |trace_config| specifies the configuration for tracing. This includes the
// list of categories enabled, tracing modes and memory dumps configuration.
// Once all child processes have acked to the StartTracing request,
// |start_tracing_done_callback| will be called back.
//
// See base/trace_event/trace_config.h for documentation of configurations.
[[nodiscard]] bool BeginTracingWithTraceConfig(
const base::trace_event::TraceConfig& trace_config);
using StartTracingDoneCallback = base::OnceClosure;
[[nodiscard]] bool BeginTracingWithTraceConfig(
const base::trace_event::TraceConfig& trace_config,
StartTracingDoneCallback start_tracing_done_callback);
// Called from UI thread.
// End trace and collect the trace output as a json string.
[[nodiscard]] bool EndTracing(std::string* json_trace_output);
} // namespace tracing
#endif // CHROME_TEST_BASE_TRACING_H_
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