1 #include <unistd.h> 2 #include <stdio.h> 3 #include <stdlib.h> 4 5 #include "test_helpers.h" 6 7 int main(void) { 8 // sbrk report current brk 9 void * current = sbrk(0); 10 ERROR_IF(sbrk, current, == (void *)-1); 11 12 // sbrk increment and report previous brk 13 void * prev = current; 14 current = sbrk(4096); 15 ERROR_IF(sbrk, current, != prev); 16 17 // sbrk report current break 18 prev = current; 19 current = sbrk(0); 20 ERROR_IF(sbrk, current, != (void*)((uintptr_t)prev + 4096)); 21 22 // brk set break to new value 23 int status = brk((void*)((uintptr_t)current + 4096)); 24 ERROR_IF(brk, status, == -1); 25 UNEXP_IF(brk, status, != 0); 26 } 27