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// 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.
package main
// Setting an environment variable in a cgo program changes the C
// environment. Test that this does not confuse the race detector.
/*
#cgo CFLAGS: -fsanitize=thread
#cgo LDFLAGS: -fsanitize=thread
*/
import "C"
import (
"fmt"
"os"
"sync"
"time"
)
func main() {
var wg sync.WaitGroup
var mu sync.Mutex
f := func() {
defer wg.Done()
for i := 0; i < 100; i++ {
time.Sleep(time.Microsecond)
mu.Lock()
s := fmt.Sprint(i)
os.Setenv("TSAN_TEST"+s, s)
mu.Unlock()
}
}
wg.Add(2)
go f()
go f()
wg.Wait()
}
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