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Diffstat (limited to 'test/test_mem_cache_write_free.c')
-rw-r--r-- | test/test_mem_cache_write_free.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/test/test_mem_cache_write_free.c b/test/test_mem_cache_write_free.c new file mode 100644 index 0000000..0850faf --- /dev/null +++ b/test/test_mem_cache_write_free.c @@ -0,0 +1,103 @@ +/* + * Copyright (c) 2010 Richard Braun. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#define _GNU_SOURCE +#include <sched.h> + +#include <stdio.h> +#include <assert.h> +#include <string.h> + +#include "../mem.h" +#include "../macros.h" + +struct obj { + unsigned long nr_refs; + char name[16]; +}; + +static void obj_ctor(void *ptr) +{ + struct obj *obj; + + obj = ptr; + obj->nr_refs = 0; +} + +static void obj_print(struct obj *obj) +{ + unsigned char *ptr, *end; + + printf("buffer content: "); + + for (ptr = (unsigned char *)obj, end = ptr + sizeof(*obj); + ptr < end; + ptr++) + printf("%02x", *ptr); + + printf("\n"); +} + +int main(int argc, char *argv[]) +{ + struct mem_cache *obj_cache; + struct obj *obj; + cpu_set_t cpu_set; + + (void)argc; + (void)argv; + + printf("binding to CPU 0\n"); + CPU_ZERO(&cpu_set); + CPU_SET(0, &cpu_set); + sched_setaffinity(0, sizeof(cpu_set), &cpu_set); + + mem_init(); + + obj_cache = mem_cache_create("obj", sizeof(struct obj), 0, + obj_ctor, NULL, MEM_CACHE_VERIFY); + + printf("doing normal alloc+free:\n"); + obj = mem_cache_alloc(obj_cache); + mem_cache_free(obj_cache, obj); + + mem_cache_info(obj_cache); + + obj_print(obj); + + printf("doing write on free object:\n"); + memset((void *)obj + 3, 0x89, 5); + + obj_print(obj); + + printf("trying normal alloc+free on same CPU (should fail):\n"); + + obj = mem_cache_alloc(obj_cache); + mem_cache_free(obj_cache, obj); + + printf("done\n"); + + return 0; +} |