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stack1k.c

#include <malloc.h>
#include <alloca.h>
#include <stdio.h>
#include <sys/resource.h>

size_t sizzle;

void recurse(int i) {
  char *foo = alloca(sizzle);
  foo[sizzle - 1] = 0;
  fprintf(stderr, "%x", (unsigned int)foo);
  printf("%d\n", i);
  recurse(i + 1);
}

int main() {
  struct rlimit *rlim = malloc(sizeof (struct rlimit));
  if (getrlimit(RLIMIT_STACK, rlim) == 0) {
    sizzle = rlim->rlim_max;
  } else {
    printf("ERROR");
    return 1;
  }
  recurse(0);
  return 0;
}