936615752a
Copy all the misc/cgo files from the gc toolchain into libgo/misc.
These will be used for testing purposes by later changes to the
gotools directory.
Reviewed-on: https://go-review.googlesource.com/46721
From-SVN: r249674
41 lines
708 B
Go
41 lines
708 B
Go
// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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// Setting an environment variable in a cgo program changes the C
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// environment. Test that this does not confuse the race detector.
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/*
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#cgo CFLAGS: -fsanitize=thread
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#cgo LDFLAGS: -fsanitize=thread
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*/
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import "C"
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import (
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"fmt"
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"os"
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"sync"
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"time"
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)
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func main() {
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var wg sync.WaitGroup
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var mu sync.Mutex
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f := func() {
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defer wg.Done()
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for i := 0; i < 100; i++ {
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time.Sleep(time.Microsecond)
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mu.Lock()
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s := fmt.Sprint(i)
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os.Setenv("TSAN_TEST"+s, s)
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mu.Unlock()
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}
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}
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wg.Add(2)
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go f()
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go f()
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wg.Wait()
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}
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