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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/trace_event/trace_event_impl.h" | 5 #include "base/trace_event/trace_event_impl.h" |
6 | 6 |
7 #include <fcntl.h> | 7 #include <fcntl.h> |
8 | 8 |
9 #include "base/format_macros.h" | 9 #include "base/format_macros.h" |
10 #include "base/logging.h" | 10 #include "base/logging.h" |
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194 int atrace_fd = HANDLE_EINTR(open(kATraceMarkerFile, O_WRONLY | O_APPEND)); | 194 int atrace_fd = HANDLE_EINTR(open(kATraceMarkerFile, O_WRONLY | O_APPEND)); |
195 if (atrace_fd == -1) { | 195 if (atrace_fd == -1) { |
196 PLOG(WARNING) << "Couldn't open " << kATraceMarkerFile; | 196 PLOG(WARNING) << "Couldn't open " << kATraceMarkerFile; |
197 return; | 197 return; |
198 } | 198 } |
199 | 199 |
200 // Android's kernel trace system has a trace_marker feature: this is a file on | 200 // Android's kernel trace system has a trace_marker feature: this is a file on |
201 // debugfs that takes the written data and pushes it onto the trace | 201 // debugfs that takes the written data and pushes it onto the trace |
202 // buffer. So, to establish clock sync, we write our monotonic clock into that | 202 // buffer. So, to establish clock sync, we write our monotonic clock into that |
203 // trace buffer. | 203 // trace buffer. |
204 double now_in_seconds = (TraceTicks::Now() - TraceTicks()).InSecondsF(); | 204 double now_in_seconds = (TimeTicks::Now() - TimeTicks()).InSecondsF(); |
205 std::string marker = StringPrintf( | 205 std::string marker = StringPrintf( |
206 "trace_event_clock_sync: parent_ts=%f\n", now_in_seconds); | 206 "trace_event_clock_sync: parent_ts=%f\n", now_in_seconds); |
207 WriteToATrace(atrace_fd, marker.c_str(), marker.size()); | 207 WriteToATrace(atrace_fd, marker.c_str(), marker.size()); |
208 close(atrace_fd); | 208 close(atrace_fd); |
209 } | 209 } |
210 | 210 |
211 } // namespace trace_event | 211 } // namespace trace_event |
212 } // namespace base | 212 } // namespace base |
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