12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455 |
- // 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 defers
- // asynchronous signals until the signaled thread calls into libc. The runtime's
- // sysmon goroutine idles itself using direct usleep syscalls, so it could
- // run for an arbitrarily long time without triggering the libc interceptors.
- // See https://golang.org/issue/18717.
- import (
- "os"
- "os/signal"
- "syscall"
- )
- /*
- #cgo CFLAGS: -g -fsanitize=thread
- #cgo LDFLAGS: -g -fsanitize=thread
- #include <signal.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- static void raise_usr2(int signo) {
- raise(SIGUSR2);
- }
- static void register_handler(int signo) {
- struct sigaction sa;
- memset(&sa, 0, sizeof(sa));
- sigemptyset(&sa.sa_mask);
- sa.sa_flags = SA_ONSTACK;
- sa.sa_handler = raise_usr2;
- if (sigaction(SIGUSR1, &sa, NULL) != 0) {
- perror("failed to register SIGUSR1 handler");
- exit(EXIT_FAILURE);
- }
- }
- */
- import "C"
- func main() {
- ch := make(chan os.Signal, 1)
- signal.Notify(ch, syscall.SIGUSR2)
- C.register_handler(C.int(syscall.SIGUSR1))
- syscall.Kill(syscall.Getpid(), syscall.SIGUSR1)
- <-ch
- }
|