1 #include <assert.h>
2 #include <setjmp.h>
3 #include <signal.h>
4 #include <stdio.h>
5 #include <stdlib.h>
6 
7 // Regression test for bug 91162:  if a client had a SEGV signal handler,
8 // and jumped to a bogus address, Valgrind would abort.  With the fix,
9 // the following test runs to completion correctly.
10 
11 static jmp_buf myjmpbuf;
12 
13 static
14 void SIGSEGV_handler(int signum)
15 {
16    longjmp(myjmpbuf, 1);
17 }
18 
19 int main(void)
20 {
21    struct sigaction sigsegv_new, sigsegv_saved;
22    int res;
23 
24    /* Install own SIGSEGV handler */
25    sigsegv_new.sa_handler  = SIGSEGV_handler;
26    sigsegv_new.sa_flags    = 0;
27 #if !defined(__APPLE__) && !defined(__sun)
28    sigsegv_new.sa_restorer = NULL;
29 #endif
30    res = sigemptyset( &sigsegv_new.sa_mask );
31    assert(res == 0);
32 
33    res = sigaction( SIGSEGV, &sigsegv_new, &sigsegv_saved );
34    assert(res == 0);
35 
36    if (setjmp(myjmpbuf) == 0) {
37       // Jump to zero; will cause seg fault
38 #if defined(__powerpc64__) && (_CALL_ELF != 2)
39       unsigned long int fn[3];
40       fn[0] = 0;
41       fn[1] = 0;
42       fn[2] = 0;
43 #else
44       void (*fn)(void) = 0;
45 #endif
46       ((void(*)(void)) fn) ();
47       fprintf(stderr, "Got here??\n");
48    } else  {
49       fprintf(stderr, "Signal caught, as expected\n");
50    }
51 
52    return 0;
53 }
54 
55