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Bug #3114 » test_malloc.c

ddegroot, 12/31/2017 04:14 AM

 
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <errno.h>

// On Linux
#if !defined(SIZE_MAX)
#define SIZE_MAX __SIZE_MAX__ // ((size_t)-1) = 9223372036854775807 = LONG_MAX
#endif
// On DragonFlyBSD
//#define SIZE_MAX UINT64_MAX // from /usr/include/machine/int_limits.h

int main () {
printf("SIZE_MAX=%lu\n", SIZE_MAX);
unsigned long tests[] = {
9223372036854775807UL,
223372036854775808UL,
23372036854775808UL,
3372036854775808UL,
372036854775808UL,
0x7ff7bf77f001UL,
0x7ff7bf77f000UL,
72036854775808UL,
2036854775808UL,
36854775808UL,
INTPTR_MAX,
UINTPTR_MAX,
SIZE_MAX - 2,
SIZE_MAX,
SIZE_MAX + 'a',
SIZE_MAX + SIZE_MAX,
SIZE_MAX * 20
};
for (int test = 0; test < 16; test++) {
// for (int test = 0; test < 2; test++) {
printf("test%d: malloc size:%lu, ", test, tests[test]);

uint *ptr = (int *) malloc(tests[test]);
if (ptr == NULL) {
printf("malloc failed, ptr == NULL, errno:%d\n", errno);
} else {
printf(" ptr == %p\n", ptr);
free(ptr);
ptr = NULL;
}
}
return 0;
}
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