mirror of
https://github.com/golang/go
synced 2024-11-17 14:04:48 -07:00
61 lines
1.3 KiB
Go
61 lines
1.3 KiB
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
|
||
|
|
|
||
|
|
// This program failed when run under the C/C++ ThreadSanitizer. The TSAN
|
||
|
|
// sigaction function interceptor returned SIG_DFL instead of the Go runtime's
|
||
|
|
// handler in registerSegvForwarder.
|
||
|
|
|
||
|
|
/*
|
||
|
|
#cgo CFLAGS: -fsanitize=thread
|
||
|
|
#cgo LDFLAGS: -fsanitize=thread
|
||
|
|
|
||
|
|
#include <signal.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
struct sigaction prev_sa;
|
||
|
|
|
||
|
|
void forwardSignal(int signo, siginfo_t *info, void *context) {
|
||
|
|
// One of sa_sigaction and/or sa_handler
|
||
|
|
if ((prev_sa.sa_flags&SA_SIGINFO) != 0) {
|
||
|
|
prev_sa.sa_sigaction(signo, info, context);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (prev_sa.sa_handler != SIG_IGN && prev_sa.sa_handler != SIG_DFL) {
|
||
|
|
prev_sa.sa_handler(signo);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
fprintf(stderr, "No Go handler to forward to!\n");
|
||
|
|
abort();
|
||
|
|
}
|
||
|
|
|
||
|
|
void registerSegvFowarder() {
|
||
|
|
struct sigaction sa;
|
||
|
|
memset(&sa, 0, sizeof(sa));
|
||
|
|
sigemptyset(&sa.sa_mask);
|
||
|
|
sa.sa_flags = SA_SIGINFO | SA_ONSTACK;
|
||
|
|
sa.sa_sigaction = forwardSignal;
|
||
|
|
|
||
|
|
if (sigaction(SIGSEGV, &sa, &prev_sa) != 0) {
|
||
|
|
perror("failed to register SEGV forwarder");
|
||
|
|
exit(EXIT_FAILURE);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
*/
|
||
|
|
import "C"
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
C.registerSegvFowarder()
|
||
|
|
|
||
|
|
defer func() {
|
||
|
|
recover()
|
||
|
|
}()
|
||
|
|
var nilp *int
|
||
|
|
*nilp = 42
|
||
|
|
}
|