1/* { dg-do run { target *-*-linux* *-*-gnu* *-*-solaris* } } */ 2/* { dg-options -O2 } */ 3 4#include <sys/types.h> 5#include <sys/mman.h> 6#include <unistd.h> 7#include <stdlib.h> 8 9struct S { long x __attribute__((packed)); }; /* { dg-warning "attribute ignored" "" { target default_packed } } */ 10volatile long sink; 11 12void foo (struct S *s) 13{ 14 sink = s->x; 15} 16 17int main () 18{ 19 size_t ps = getpagesize (); 20 char *ptr, *page; 21 struct S *s; 22 23 ptr = malloc (3*ps); 24 page = (char *)(((__UINTPTR_TYPE__)ptr + (ps - 1)) & -ps); 25 munmap (page + ps, ps); 26 27 s = (struct S *)(page + ps - sizeof(struct S)); 28 foo(s); 29 30 return 0; 31} 32