John McCutchan
291befa1cd
A TimelineTask represents an asynchronous track of operations on the timeline.
The old API allowed multiple isolates to emit events simultaneously on the same task or to start / finish events in any order. This isn't supported by our UI and probably many other tools that consume trace-event.
With this change, operations within a TimelineTask must complete in the reverse order of their start calls (aka a stack). You can pass a TimelineTask from one isolate to another but you must first complete all open operations before passing it.
Example:
var task = new TimelineTask();
task.start('Some phase');
await someFuture;
task.finish();
Also: Add support for instant events.
R=rmacnak@google.com
Review URL: https://codereview.chromium.org/1412183008 .
33 lines
926 B
Dart
33 lines
926 B
Dart
// Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import 'dart:_internal';
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patch int _getTraceClock() native "Timeline_getTraceClock";
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patch int _getNextAsyncId() native "Timeline_getNextAsyncId";
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patch int _getIsolateNum() native "Timeline_getIsolateNum";
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patch void _reportTaskEvent(
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int start,
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int taskId,
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String phase,
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String category,
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String name,
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String argumentsAsJson) native "Timeline_reportTaskEvent";
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patch void _reportCompleteEvent(
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int start,
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int end,
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String category,
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String name,
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String argumentsAsJson) native "Timeline_reportCompleteEvent";
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patch void _reportInstantEvent(
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int start,
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String category,
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String name,
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String argumentsAsJson) native "Timeline_reportInstantEvent";
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