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