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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
50 lines
817 B
Go
50 lines
817 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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// Check that writes to Go allocated memory, with Go synchronization,
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// do not look like a race.
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/*
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#cgo CFLAGS: -fsanitize=thread
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#cgo LDFLAGS: -fsanitize=thread
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void f(char *p) {
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*p = 1;
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}
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*/
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import "C"
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import (
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"runtime"
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"sync"
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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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c := make(chan []C.char, 100)
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for i := 0; i < 10; i++ {
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wg.Add(2)
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go func() {
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defer wg.Done()
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for i := 0; i < 100; i++ {
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c <- make([]C.char, 4096)
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runtime.Gosched()
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}
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}()
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go func() {
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defer wg.Done()
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for i := 0; i < 100; i++ {
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p := &(<-c)[0]
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mu.Lock()
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C.f(p)
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mu.Unlock()
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}
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}()
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}
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wg.Wait()
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}
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