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#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
int main(void)
{
void *p;
/* Our implementation should always return NULL */
errno = 0;
p = malloc(0);
assert(p == NULL);
assert(errno == 0);
/* These sizes won't fit in memory, so should always fail */
errno = 0;
p = malloc(SIZE_MAX);
assert(p == NULL);
assert(errno == ENOMEM);
errno = 0;
p = malloc(SIZE_MAX - 0x10000);
assert(p == NULL);
assert(errno == ENOMEM);
#if SIZE_MAX > 0x100000000
/* We should be able to allocate 4 GB + 1 */
p = malloc(0x100000001);
assert(p != NULL);
((volatile char *)p)[0x100000000] = 1;
free(p);
/* calloc() should detect multiplication overflow */
errno = 0;
p = calloc(0x100000000, 0x100000000);
assert(p == NULL);
assert(errno == ENOMEM);
errno = 0;
p = calloc(0x100000001, 0x100000001);
assert(p == NULL);
assert(errno == ENOMEM);
#else
/* calloc() should detect multiplication overflow */
errno = 0;
p = calloc(0x10000, 0x10000);
assert(p == NULL);
assert(errno == ENOMEM);
errno = 0;
p = calloc(0x10001, 0x10001);
assert(p == NULL);
assert(errno == ENOMEM);
#endif
return 0;
}
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