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glibc/malloc/tst-obstack.c
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/* Test case by Alexandre Duret-Lutz <duret_g@epita.fr>. */ | |
#include <obstack.h> | |
#include <stdint.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#define obstack_chunk_alloc verbose_malloc | |
#define obstack_chunk_free verbose_free | |
#define ALIGN_BOUNDARY 64 | |
#define ALIGN_MASK (ALIGN_BOUNDARY - 1) | |
#define OBJECT_SIZE 1000 | |
static void * | |
verbose_malloc (size_t size) | |
{ | |
void *buf = malloc (size); | |
printf ("malloc (%zu) => %p\n", size, buf); | |
return buf; | |
} | |
static void | |
verbose_free (void *buf) | |
{ | |
free (buf); | |
printf ("free (%p)\n", buf); | |
} | |
static int | |
do_test (void) | |
{ | |
int result = 0; | |
int align = 2; | |
while (align <= 64) | |
{ | |
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; | |
} | |
/* clean up */ | |
obstack_free (&obs, 0); | |
align <<= 1; | |
} | |
return result; | |
} | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |