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- // Copyright 2015 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
- import "fmt"
- /*
- #cgo CFLAGS: -pthread
- #cgo LDFLAGS: -pthread
- #include <signal.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #include <pthread.h>
- int *p;
- static void sigsegv() {
- *p = 1;
- fprintf(stderr, "ERROR: C SIGSEGV not thrown on caught?.\n");
- exit(2);
- }
- static void segvhandler(int signum) {
- if (signum == SIGSEGV) {
- fprintf(stdout, "ok\ttestsigfwd\n");
- exit(0); // success
- }
- }
- static volatile sig_atomic_t sigioSeen;
- // Use up some stack space.
- static void recur(int i, char *p) {
- char a[1024];
- *p = '\0';
- if (i > 0) {
- recur(i - 1, a);
- }
- }
- static void iohandler(int signum) {
- char a[1024];
- recur(4, a);
- sigioSeen = 1;
- }
- static void* sigioThread(void* arg __attribute__ ((unused))) {
- raise(SIGIO);
- return NULL;
- }
- static void sigioOnThread() {
- pthread_t tid;
- int i;
- pthread_create(&tid, NULL, sigioThread, NULL);
- pthread_join(tid, NULL);
- // Wait until the signal has been delivered.
- i = 0;
- while (!sigioSeen) {
- if (sched_yield() < 0) {
- perror("sched_yield");
- }
- i++;
- if (i > 10000) {
- fprintf(stderr, "looping too long waiting for signal\n");
- exit(EXIT_FAILURE);
- }
- }
- }
- static void __attribute__ ((constructor)) sigsetup(void) {
- struct sigaction act;
- memset(&act, 0, sizeof act);
- act.sa_handler = segvhandler;
- sigaction(SIGSEGV, &act, NULL);
- act.sa_handler = iohandler;
- sigaction(SIGIO, &act, NULL);
- }
- */
- import "C"
- var p *byte
- func f() (ret bool) {
- defer func() {
- if recover() == nil {
- fmt.Errorf("ERROR: couldn't raise SIGSEGV in Go.")
- C.exit(2)
- }
- ret = true
- }()
- *p = 1
- return false
- }
- func main() {
- // Test that the signal originating in Go is handled (and recovered) by Go.
- if !f() {
- fmt.Errorf("couldn't recover from SIGSEGV in Go.")
- C.exit(2)
- }
- // Test that the signal originating in C is handled by C.
- C.sigsegv()
- }
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