text: #ifndef VM_GCH
  #define VM_GCH
  
  extern void vm_mem_setPanicExceptionObject(dj_object *obj);
  extern dj_object * vm_mem_getPanicExceptionObject();
  
  // Hooks
  extern void vm_mem_markRootSet(void *data);
  extern void vm_mem_updatePointers(void *data);
  extern void vm_mem_markObject(void *data);
  extern void vm_mem_postGC(void *data);
  
  #endif // VM_GCH