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131
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1 /* This test needs to use setrlimit to set the stack size, so it can
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2 only run on Unix. */
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3 /* { dg-do run { target { i?86-*-linux* i?86-*-gnu* x86_64-*-linux* } } } */
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4 /* { dg-require-effective-target cet } */
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5 /* { dg-require-effective-target split_stack } */
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6 /* { dg-options "-fsplit-stack -fcf-protection" } */
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7
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8 #include <stdlib.h>
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9 #include <sys/types.h>
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10 #include <sys/resource.h>
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11
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12 /* Use a noinline function to ensure that the buffer is not removed
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13 from the stack. */
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14 static void use_buffer (char *buf) __attribute__ ((noinline));
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15 static void
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16 use_buffer (char *buf)
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17 {
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18 buf[0] = '\0';
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19 }
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20
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21 /* Each recursive call uses 10,000 bytes. We call it 1000 times,
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22 using a total of 10,000,000 bytes. If -fsplit-stack is not
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23 working, that will overflow our stack limit. */
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24
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25 static void
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26 down (int i)
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27 {
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28 char buf[10000];
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29
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30 if (i > 0)
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31 {
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32 use_buffer (buf);
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33 down (i - 1);
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34 }
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35 }
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36
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37 int
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38 main (void)
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39 {
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40 struct rlimit r;
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41
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42 /* We set a stack limit because we are usually invoked via make, and
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43 make sets the stack limit to be as large as possible. */
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44 r.rlim_cur = 8192 * 1024;
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45 r.rlim_max = 8192 * 1024;
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46 if (setrlimit (RLIMIT_STACK, &r) != 0)
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47 abort ();
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48 down (1000);
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49 return 0;
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50 }
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