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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 module tracing; |
| 6 |
| 7 // To participate in the tracing ecosystem, implement the TraceController |
| 8 // interface and connect to the tracing app. Then, when the controller's Start() |
| 9 // function is called collect tracing data and pass it back via the provided |
| 10 // TraceDataCollector interface up until Stop() is called. |
| 11 |
| 12 interface TraceController { |
| 13 StartTracing(string categories, TraceDataCollector collector); |
| 14 StopTracing(); |
| 15 }; |
| 16 |
| 17 interface TraceDataCollector { |
| 18 DataCollected(string json); |
| 19 }; |
| 20 |
| 21 interface TraceCoordinator { |
| 22 // Request tracing data from all connected TraceControllers to stream to |
| 23 // |stream|. |
| 24 Start(handle<data_pipe_producer> stream, string categories); |
| 25 |
| 26 // Stop tracing and flush results to file. |
| 27 StopAndFlush(); |
| 28 }; |
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