blob: 88d82a6078926aa76bcccc91b90829749edb9f54 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
// 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
}
|
