1 /* This test needs to use setrlimit to set the stack size, so it can
2 only run on Unix. */
3 /* { dg-do run { target { i?86-*-linux* i?86-*-gnu* x86_64-*-linux* } } } */
4 /* { dg-require-effective-target cet } */
5 /* { dg-require-effective-target split_stack } */
6 /* { dg-options "-fsplit-stack -fcf-protection" } */
7
8 #include <stdarg.h>
9 #include <stdlib.h>
10 #include <sys/types.h>
11 #include <sys/resource.h>
12
13 /* Use a noinline function to ensure that the buffer is not removed
14 from the stack. */
15 static void use_buffer (char *buf) __attribute__ ((noinline));
16 static void
use_buffer(char * buf)17 use_buffer (char *buf)
18 {
19 buf[0] = '\0';
20 }
21
22 /* Each recursive call uses 10,000 bytes. We call it 1000 times,
23 using a total of 10,000,000 bytes. If -fsplit-stack is not
24 working, that will overflow our stack limit. */
25
26 static void
down(int i,...)27 down (int i, ...)
28 {
29 char buf[10000];
30 va_list ap;
31
32 va_start (ap, i);
33 if (va_arg (ap, int) != 1
34 || va_arg (ap, int) != 2
35 || va_arg (ap, int) != 3
36 || va_arg (ap, int) != 4
37 || va_arg (ap, int) != 5
38 || va_arg (ap, int) != 6
39 || va_arg (ap, int) != 7
40 || va_arg (ap, int) != 8
41 || va_arg (ap, int) != 9
42 || va_arg (ap, int) != 10)
43 abort ();
44
45 if (i > 0)
46 {
47 use_buffer (buf);
48 down (i - 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
49 }
50 }
51
52 int
main(void)53 main (void)
54 {
55 struct rlimit r;
56
57 /* We set a stack limit because we are usually invoked via make, and
58 make sets the stack limit to be as large as possible. */
59 r.rlim_cur = 8192 * 1024;
60 r.rlim_max = 8192 * 1024;
61 if (setrlimit (RLIMIT_STACK, &r) != 0)
62 abort ();
63 down (1000, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
64 return 0;
65 }
66