| /* { dg-do run { target *-*-linux* *-*-solaris* } } */ | |
| /* { dg-options -O2 } */ | |
| #include <sys/types.h> | |
| #include <sys/mman.h> | |
| #include <unistd.h> | |
| #include <stdlib.h> | |
| struct S { long x __attribute__((packed)); }; | |
| volatile long sink; | |
| void foo (struct S *s) | |
| { | |
| sink = s->x; | |
| } | |
| int main () | |
| { | |
| size_t ps = getpagesize (); | |
| char *ptr, *page; | |
| struct S *s; | |
| ptr = malloc (3*ps); | |
| page = (char *)(((size_t)ptr + (ps - 1)) & -ps); | |
| munmap (page + ps, ps); | |
| s = (struct S *)(page + ps - sizeof(struct S)); | |
| foo(s); | |
| return 0; | |
| } |