static int get_protection()

in fishhook.c [85:111]

• 24 lines of code
• 4 McCabe index (conditional complexity)

static int get_protection(void *addr, vm_prot_t *prot, vm_prot_t *max_prot) {
  mach_port_t task = mach_task_self();
  vm_size_t size = 0;
  vm_address_t address = (vm_address_t)addr;
  memory_object_name_t object;
#ifdef __LP64__
  mach_msg_type_number_t count = VM_REGION_BASIC_INFO_COUNT_64;
  vm_region_basic_info_data_64_t info;
  kern_return_t info_ret = vm_region_64(
      task, &address, &size, VM_REGION_BASIC_INFO_64, (vm_region_info_64_t)&info, &count, &object);
#else
  mach_msg_type_number_t count = VM_REGION_BASIC_INFO_COUNT;
  vm_region_basic_info_data_t info;
  kern_return_t info_ret = vm_region(task, &address, &size, VM_REGION_BASIC_INFO, (vm_region_info_t)&info, &count, &object);
#endif
  if (info_ret == KERN_SUCCESS) {
    if (prot != NULL)
      *prot = info.protection;

    if (max_prot != NULL)
      *max_prot = info.max_protection;

    return 0;
  }

  return -1;
}