1 // Copyright 2016 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
7 // This program failed when run under the C/C++ ThreadSanitizer. The TSAN
8 // sigaction function interceptor returned SIG_DFL instead of the Go runtime's
9 // handler in registerSegvForwarder.
12 #cgo CFLAGS: -fsanitize=thread
13 #cgo LDFLAGS: -fsanitize=thread
20 struct sigaction prev_sa;
22 void forwardSignal(int signo, siginfo_t *info, void *context) {
23 // One of sa_sigaction and/or sa_handler
24 if ((prev_sa.sa_flags&SA_SIGINFO) != 0) {
25 prev_sa.sa_sigaction(signo, info, context);
28 if (prev_sa.sa_handler != SIG_IGN && prev_sa.sa_handler != SIG_DFL) {
29 prev_sa.sa_handler(signo);
33 fprintf(stderr, "No Go handler to forward to!\n");
37 void registerSegvFowarder() {
39 memset(&sa, 0, sizeof(sa));
40 sigemptyset(&sa.sa_mask);
41 sa.sa_flags = SA_SIGINFO | SA_ONSTACK;
42 sa.sa_sigaction = forwardSignal;
44 if (sigaction(SIGSEGV, &sa, &prev_sa) != 0) {
45 perror("failed to register SEGV forwarder");
53 C.registerSegvFowarder()