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// Copyright 2017 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
// This program hung when run under the C/C++ ThreadSanitizer. TSAN installs a
// libc interceptor that writes signal handlers to a global variable within the
// TSAN runtime instead of making a sigaction system call. A bug in
// syscall.runtime_AfterForkInChild corrupted TSAN's signal forwarding table
// during calls to (*os/exec.Cmd).Run, causing the parent process to fail to
// invoke signal handlers.
import (
"fmt"
"os"
"os/exec"
"os/signal"
"syscall"
)
import "C"
func main() {
ch := make(chan os.Signal)
signal.Notify(ch, syscall.SIGUSR1)
if err := exec.Command("true").Run(); err != nil {
fmt.Fprintf(os.Stderr, "Unexpected error from `true`: %v", err)
os.Exit(1)
}
syscall.Kill(syscall.Getpid(), syscall.SIGUSR1)
<-ch
}
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