#include <bits/stdc++.h>
void set_stack_limit(size_t mb) {
    size_t bytes = mb * 1024 * 1024;
    void* old_rsp = NULL;
    asm volatile ("mov %%esp, %0;" : "=r" ( old_rsp ));
    void* fake_stack = (void*)((char*)std::calloc(bytes,1)+bytes-1);
    asm volatile ("mov %0, %%esp" : : "r" (fake_stack));
    asm volatile ("mov %0, %%esp" : : "r" (old_rsp));
}
int main() {
    set_stack_limit(511);
    std::array<char, 300 * 1024 * 1024> arr;
    std::cout << arr[5];
    return 0;
}