| // Copyright 2016 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| //go:build gc | |
| // +build gc | |
| package main | |
| import ( | |
| "flag" | |
| "runtime/trace" | |
| ) | |
| var traceProfile = flag.String("trace", "", "trace profile output") | |
| func doTrace() func() { | |
| if *traceProfile != "" { | |
| bw, flush := bufferedFileWriter(*traceProfile) | |
| trace.Start(bw) | |
| return func() { | |
| flush() | |
| trace.Stop() | |
| } | |
| } | |
| return func() {} | |
| } |