invalid memory
---

#include "stdio.h"

int main() {
  char *ptr = (char*)0xdeadbeef;
  printf("%s\n", *ptr);

  // char *ptr = (char*)0xdeadbeef;
  // *ptr='a';
}

exploding the heap
---

    queue_t q;

    while(1){
        enqueue(&q, NULL);
    }

exploding the heap, normal OS?
---

#include "stdlib.h"
#include "stdio.h"
int main() {
    int mem = 0;
    while(1) {
        void *xyz = malloc(1024*1024); // 1M
        mem += 1;
        printf("allocated: %.3fG\n", mem/1024.0);
    }
}

gdb for egos app
---

(gdb) b helloworld.c:main
(gdb) add-symbol-file build/release/user/helloworld.elf

(gdb) p core_to_proc_idx[core_in_kernel]

(gdb) b helloworld.c:main if core_to_proc_idx[core_in_kernel]==5