go tsan5 源码
golang tsan5 代码
文件路径：/misc/cgo/testsanitizers/testdata/tsan5.go
// 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 calls to C.malloc/C.free do not collide with the calls
// made by the os/user package.
// #cgo CFLAGS: -fsanitize=thread
// #cgo LDFLAGS: -fsanitize=thread
// #include <stdlib.h>
import "C"
import (
"fmt"
"os"
"os/user"
"runtime"
"sync"
)
func main() {
u, err := user.Current()
if err != nil {
fmt.Fprintln(os.Stderr, err)
// Let the test pass.
os.Exit(0)
}
var wg sync.WaitGroup
for i := 0; i < 20; i++ {
wg.Add(2)
go func() {
defer wg.Done()
for i := 0; i < 1000; i++ {
user.Lookup(u.Username)
runtime.Gosched()
}
}()
go func() {
defer wg.Done()
for i := 0; i < 1000; i++ {
p := C.malloc(C.size_t(len(u.Username) + 1))
runtime.Gosched()
C.free(p)
}
}()
}
wg.Wait()
}
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