| // Copyright 2023 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. |
| |
| // Tests simply starting and stopping tracing multiple times. |
| // |
| // This is useful for finding bugs in trace state reset. |
| |
| //go:build ignore |
| |
| package main |
| |
| import ( |
| "bytes" |
| "log" |
| "os" |
| "runtime" |
| "runtime/trace" |
| ) |
| |
| func main() { |
| // Trace a few times. |
| for i := 0; i < 10; i++ { |
| var buf bytes.Buffer |
| if err := trace.Start(&buf); err != nil { |
| log.Fatalf("failed to start tracing: %v", err) |
| } |
| runtime.GC() |
| trace.Stop() |
| } |
| |
| // Start tracing again, this time writing out the result. |
| if err := trace.Start(os.Stdout); err != nil { |
| log.Fatalf("failed to start tracing: %v", err) |
| } |
| runtime.GC() |
| trace.Stop() |
| } |