1
2#include <signal.h>
3#include <stdio.h>
4#include <sys/syscall.h>
5#include <unistd.h>
6
7// Reg test for bug #93328: we were using too-big sigset types, and thus
8// trashing memory when we wrote out the 'oldset' param from sigprocmask().
9
10int main(void)
11{
12#if defined(__NR_sigprocmask)        \
13    && !defined(__powerpc64__)       \
14    && !defined(__s390x__)           \
15    && !defined(__arm__)
16
17   // arm-linux uses rt_sigprocmask, so no sigset mangling takes place
18
19   int x[6], *s, *os, i;
20
21   x[0] = 0x11111111;
22   x[1] = 0x89abcdef;
23   x[2] = 0x22222222;
24   x[3] = 0x33333333;
25   x[4] = 0x0;
26   x[5] = 0x44444444;
27
28   s  = &x[1];
29   os = &x[4];
30
31   // Make sure the system is in a known state with no signals
32   // blocked as perl has been known to leave some signals blocked
33   // when starting child processes which can cause failures in
34   // this test unless we reset things here.
35   syscall(__NR_sigprocmask, SIG_SETMASK, os, NULL);
36
37   fprintf(stderr, "before\n");
38   for (i = 0; i < 6; i++) {
39      fprintf(stderr, "%x ", x[i]);
40   }
41   fprintf(stderr, "\n");
42
43   syscall(__NR_sigprocmask, SIG_BLOCK, s, os);
44
45   fprintf(stderr, "after1\n");
46   for (i = 0; i < 6; i++) {
47      fprintf(stderr, "%x ", x[i]);
48   }
49   fprintf(stderr, "\n");
50
51   syscall(__NR_sigprocmask, SIG_BLOCK, s, os);
52
53   fprintf(stderr, "after2\n");
54   for (i = 0; i < 6; i++) {
55      fprintf(stderr, "%x ", x[i]);
56   }
57   fprintf(stderr, "\n");
58
59#else
60
61   fprintf(stderr, "__NR_sigprocmask not supported on this platform\n");
62
63#endif
64
65   return(0);
66}
67