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