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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, 1)
- 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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