diff options
Diffstat (limited to 'malloc')
| -rw-r--r-- | malloc/tst-obstack.c | 42 |
1 files changed, 26 insertions, 16 deletions
diff --git a/malloc/tst-obstack.c b/malloc/tst-obstack.c index bd00a0ab7b..cd19431bb9 100644 --- a/malloc/tst-obstack.c +++ b/malloc/tst-obstack.c @@ -28,27 +28,37 @@ verbose_free (void *buf) int main (void) { - struct obstack obs; - int i; int result = 0; + int align = 2; - obstack_init (&obs); - obstack_alignment_mask (&obs) = ALIGN_MASK; - /* finish an empty object to take alignment into account */ - obstack_finish (&obs); - - /* let's allocate some objects and print their addresses */ - for (i = 15; i > 0; --i) + while (align <= 64) { - void *obj = obstack_alloc (&obs, OBJECT_SIZE); + struct obstack obs; + int i; + int align_mask = align - 1; + + printf ("\n Alignment mask: %d\n", align_mask); + + obstack_init (&obs); + obstack_alignment_mask (&obs) = align_mask; + /* finish an empty object to take alignment into account */ + obstack_finish (&obs); + + /* let's allocate some objects and print their addresses */ + for (i = 15; i > 0; --i) + { + void *obj = obstack_alloc (&obs, OBJECT_SIZE); + + printf ("obstack_alloc (%u) => %p \t%s\n", OBJECT_SIZE, obj, + ((uintptr_t) obj & align_mask) ? "(not aligned)" : ""); + result |= ((uintptr_t) obj & align_mask) != 0; + } - printf ("obstack_alloc (%u) => %p \t%s\n", OBJECT_SIZE, obj, - ((uintptr_t) obj & ALIGN_MASK) ? "(not aligned)" : ""); - result |= ((uintptr_t) obj & ALIGN_MASK) != 0; - } + /* clean up */ + obstack_free (&obs, 0); - /* clean up */ - obstack_free (&obs, 0); + align <<= 1; + } return result; } |