1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
#include <stdio.h>
#include <string.h>
#define ALIGN(n, a) (((n) + (a)-1) & ~((a)-1))
#define MALLOC_BUFSIZE (128 * 1024 * 1024)
int malloc_count;
int free_count;
void *malloc(size_t size)
{
static char buf[MALLOC_BUFSIZE];
static unsigned alloc_size;
void *ptr;
size = ALIGN(size, 16);
if (alloc_size + size > sizeof(buf))
return NULL;
ptr = buf + alloc_size;
alloc_size += size;
malloc_count++;
return ptr;
}
void *realloc(void *ptr, size_t size)
{
void *p = malloc(size);
if (ptr)
memcpy(p, ptr, size);
return p;
}
void free(void *ptr)
{
free_count++;
}
int main(void)
{
free(malloc(16));
return 0;
}
|