projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| ddfabf89 FCE |
1 | /* Test object-spanning accesses. This is most conveniently done with |
| 2 | mmap, thus the config.h specificity here. */ | |
| 3 | #include "../config.h" | |
| 4 | ||
| 5 | #include <unistd.h> | |
| 6 | #include <string.h> | |
| 7 | #ifdef HAVE_SYS_MMAN_H | |
| 8 | #include <sys/mman.h> | |
| 9 | #endif | |
| 10 | ||
| 11 | int main () | |
| 12 | { | |
| 13 | #ifndef MAP_ANONYMOUS | |
| 14 | #define MAP_ANONYMOUS MAP_ANON | |
| 15 | #endif | |
| ab4daaf2 LR |
16 | #ifndef MAP_FAILED |
| 17 | #define MAP_FAILED ((void *)-1) | |
| 18 | #endif | |
| ddfabf89 FCE |
19 | #ifdef HAVE_MMAP |
| 20 | void *p; | |
| 21 | unsigned pg = getpagesize (); | |
| 22 | int rc; | |
| 23 | ||
| 24 | p = mmap (NULL, 4 * pg, PROT_READ|PROT_WRITE, | |
| ab4daaf2 LR |
25 | MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); |
| 26 | if (p == MAP_FAILED) | |
| ddfabf89 FCE |
27 | return 1; |
| 28 | ||
| 29 | memset (p, 0, 4*pg); | |
| 30 | rc = munmap (p, pg); | |
| 31 | if (rc < 0) return 1; | |
| 32 | memset (p+pg, 0, 3*pg); | |
| 33 | rc = munmap (p+pg, pg); | |
| 34 | if (rc < 0) return 1; | |
| 35 | memset (p+2*pg, 0, 2*pg); | |
| 36 | rc = munmap (p+2*pg, pg); | |
| 37 | if (rc < 0) return 1; | |
| 38 | memset (p+3*pg, 0, pg); | |
| 39 | rc = munmap (p+3*pg, pg); | |
| 40 | if (rc < 0) return 1; | |
| 41 | #endif | |
| 42 | ||
| 43 | return 0; | |
| 44 | } |