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
|
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
int main(void)
{
char* p = malloc(1024);
p[0] = '\0';
errno = 0;
p = realloc(p, 0);
if (p) {
printf("p not NULL after realloc 0\n");
} else {
printf("p is NULL after realloc 0\n");
}
if (errno) {
perror("realloc(something, 0):");
}
if (p) {
free(p);
}
errno = 0;
void *ptr = NULL;
volatile size_t size = 0U;
char *p2 = realloc(ptr, size);
if (p2) {
printf("p2 not NULL after realloc 0\n");
} else {
printf("p2 is NULL after realloc 0\n");
}
if (errno) {
perror("realloc(NULL, 0):");
}
if (p2) {
free(p2);
}
}
|
