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111
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1 /* { dg-do run { target *-*-linux* *-*-gnu* *-*-solaris* } } */
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2 /* { dg-options -O2 } */
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3
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4 #include <sys/types.h>
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5 #include <sys/mman.h>
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6 #include <unistd.h>
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7 #include <stdlib.h>
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8
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9 struct S { long x __attribute__((packed)); }; /* { dg-warning "attribute ignored" "" { target default_packed } } */
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10 volatile long sink;
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11
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12 void foo (struct S *s)
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13 {
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14 sink = s->x;
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15 }
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16
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17 int main ()
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18 {
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19 size_t ps = getpagesize ();
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20 char *ptr, *page;
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21 struct S *s;
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22
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23 ptr = malloc (3*ps);
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24 page = (char *)(((__UINTPTR_TYPE__)ptr + (ps - 1)) & -ps);
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25 munmap (page + ps, ps);
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26
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27 s = (struct S *)(page + ps - sizeof(struct S));
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28 foo(s);
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29
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30 return 0;
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31 }
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