sigprocmask.c revision 3c494906b44fa39755a20a1eb2c9b89425dd75d2 
1
2#include <signal.h>
3#include <stdio.h>
4#if !defined(_AIX)
5# include <sys/syscall.h>
6#endif
7#include <unistd.h>
8
9// Reg test for bug #93328: we were using too-big sigset types, and thus
10// trashing memory when we wrote out the 'oldset' param from sigprocmask().
11
12int main(void)
13{
14#if defined(__NR_sigprocmask) && !defined(__powerpc64__) && !defined(_AIX)
15
16   int x[6], *s, *os, i;
17
18   x[0] = 0x11111111;
19   x[1] = 0x89abcdef;
20   x[2] = 0x22222222;
21   x[3] = 0x33333333;
22   x[4] = 0x0;
23   x[5] = 0x44444444;
24
25   s  = &x[1];
26   os = &x[4];
27
28   // Make sure the system is in a known state with no signals
29   // blocked as perl has been known to leave some signals blocked
30   // when starting child processes which can cause failures in
31   // this test unless we reset things here.
32   syscall(__NR_sigprocmask, SIG_SETMASK, os, NULL);
33
34   fprintf(stderr, "before\n");
35   for (i = 0; i < 6; i++) {
36      fprintf(stderr, "%x ", x[i]);
37   }
38   fprintf(stderr, "\n");
39
40   syscall(__NR_sigprocmask, SIG_BLOCK, s, os);
41
42   fprintf(stderr, "after1\n");
43   for (i = 0; i < 6; i++) {
44      fprintf(stderr, "%x ", x[i]);
45   }
46   fprintf(stderr, "\n");
47
48   syscall(__NR_sigprocmask, SIG_BLOCK, s, os);
49
50   fprintf(stderr, "after2\n");
51   for (i = 0; i < 6; i++) {
52      fprintf(stderr, "%x ", x[i]);
53   }
54   fprintf(stderr, "\n");
55
56#else
57
58   fprintf(stderr, "__NR_sigprocmask not supported on this platform\n");
59
60#endif
61
62   return(0);
63}
64