böhm.cpp

#include <gc.h>
#include <cstddef>
#include <new>

void* operator new(std::size_t n) {
  void *p = GC_MALLOC(n);
  if (!p) throw std::bad_alloc();
  return p;
}

void operator delete(void *p) {
  (void)p; // lol
}

/* example use */

#include <iostream>

int main() {
  for (int i = 0; i < 1000000; i++)
    char* x = new char[10000];
  std::cout << "lmao" << std::endl;
}

/*

[hayley@I-AM-NOT-A-BURNING-BUILDING tmp]$ g++ -lgc böhm.cpp -o böhm
[hayley@I-AM-NOT-A-BURNING-BUILDING tmp]$ /usr/bin/time ./böhm 
lmao
13.10user 24.06system 0:11.97elapsed 310%CPU (0avgtext+0avgdata 4396maxresident)k
0inputs+0outputs (0major+296minor)pagefaults 0swaps

*/