mirror of
https://github.com/ioacademy-jikim/debugging
synced 2025-06-09 17:06:24 +00:00
43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include "valgrind.h"
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#include "../memcheck.h"
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struct super { int x; };
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static struct super superblock = { 12345 };
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/* run with `valgrind -q --malloc-fill=0xaf --free-fill=0xdb` */
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int main(int argc, char **argv)
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{
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unsigned char *s;
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VALGRIND_CREATE_MEMPOOL(&superblock, /*rzB=*/0, /*is_zeroed=*/0);
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s = malloc(40);
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assert(s);
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assert(*s == 0xaf);
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*s = 0x05;
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VALGRIND_MEMPOOL_ALLOC(&superblock, s, 40);
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printf("*s=%#hhx after MEMPOOL_ALLOC\n", *s);
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VALGRIND_MEMPOOL_FREE(&superblock, s);
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printf("*s=%#hhx after MEMPOOL_FREE\n", *s);
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VALGRIND_MEMPOOL_ALLOC(&superblock, s, 40);
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printf("*s=%#hhx after second MEMPOOL_ALLOC\n", *s);
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free(s);
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VALGRIND_DESTROY_MEMPOOL(&superblock);
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s = malloc(40);
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assert(s);
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assert(*s == 0xaf);
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*s = 0x05;
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VALGRIND_MALLOCLIKE_BLOCK(s, 40, 0/*rzB*/, 0/*is_zeroed*/);
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printf("*s=%#hhx after MALLOCLIKE_BLOCK\n", *s);
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VALGRIND_FREELIKE_BLOCK(s, 0/*rzB*/);
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printf("*s=%#hhx after FREELIKE_BLOCK\n", *s);
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VALGRIND_MALLOCLIKE_BLOCK(s, 40, 0/*rzB*/, 0/*is_zeroed*/);
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printf("*s=%#hhx after second MALLOCLIKE_BLOCK\n", *s);
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return 0;
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}
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