#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
int main(void) {
	size_t bytes = 0, add = UINT_MAX;
	void *v = NULL;
	for (; add > 0 && NULL == v; add /= 2) {
		if (NULL != (v = malloc(bytes + add))) {
			free(v), v = NULL;
			bytes += add;
			printf("added %10u bytes, %10u total...\n",
				add, bytes);
		}
	}
	return 0;
}
#if 0
$ ./totalmem
added  536870911 bytes,  536870911 total...
added  134217727 bytes,  671088638 total...
added   67108863 bytes,  738197501 total...
added    1048575 bytes,  739246076 total...
added     131071 bytes,  739377147 total...
added      65535 bytes,  739442682 total...
added      32767 bytes,  739475449 total...
added      16383 bytes,  739491832 total...
added       4095 bytes,  739495927 total...
added       2047 bytes,  739497974 total...
added       1023 bytes,  739498997 total...
added        511 bytes,  739499508 total...
added        255 bytes,  739499763 total...
added        127 bytes,  739499890 total...
added         31 bytes,  739499921 total...
added         15 bytes,  739499936 total...
added          3 bytes,  739499939 total...
added          1 bytes,  739499940 total...
#endif