go.blog: add racy example program

R=dvyukov, r, remyoudompheng
CC=golang-dev
https://golang.org/cl/10447044

1 files changed, 23 insertions, 0 deletions

diff --git a/support/racy/racy.go b/support/racy/racy.go
new file mode 100644
index 0000000..e23ba9b
--- /dev/null
+++ b/support/racy/racy.go
@@ -0,0 +1,23 @@
+// Copyright 2013 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.
+
+// +build !appengine
+
+// This program demonstrates a race condition.
+// To observe the race with the race detector, build with -race.
+package main
+
+import "fmt"
+
+func main() {
+	done := make(chan bool)
+	m := make(map[string]string)
+	m["name"] = "world"
+	go func() {
+		m["name"] = "data race"
+		done <- true
+	}()
+	fmt.Println("Hello,", m["name"])
+	<-done
+}