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// Copyright (C) 2025 Intel Corporation.
// Author(s): Zhao Liu <zhai1.liu@intel.com>
// SPDX-License-Identifier: GPL-2.0-or-later
use std::{ffi::CStr, mem::size_of, slice};
use qemu_api::{
bindings::{vmstate_info_int8, vmstate_info_uint8, vmstate_info_unused_buffer, VMStateFlags},
c_str,
vmstate::{VMStateDescription, VMStateField},
vmstate_fields, vmstate_of, vmstate_unused,
zeroable::Zeroable,
};
const FOO_ARRAY_MAX: usize = 3;
// =========================== Test VMSTATE_FOOA ===========================
// Test the use cases of the vmstate macro, corresponding to the following C
// macro variants:
// * VMSTATE_FOOA:
// - VMSTATE_U16
// - VMSTATE_UNUSED
// - VMSTATE_VARRAY_UINT16_UNSAFE
// - VMSTATE_VARRAY_MULTIPLY
#[repr(C)]
#[derive(qemu_api_macros::offsets)]
struct FooA {
arr: [u8; FOO_ARRAY_MAX],
num: u16,
arr_mul: [i8; FOO_ARRAY_MAX],
num_mul: u32,
elem: i8,
}
static VMSTATE_FOOA: VMStateDescription = VMStateDescription {
name: c_str!("foo_a").as_ptr(),
version_id: 1,
minimum_version_id: 1,
fields: vmstate_fields! {
vmstate_of!(FooA, elem),
vmstate_unused!(size_of::<i64>()),
vmstate_of!(FooA, arr[0 .. num]).with_version_id(0),
vmstate_of!(FooA, arr_mul[0 .. num_mul * 16]),
},
..Zeroable::ZERO
};
#[test]
fn test_vmstate_uint16() {
let foo_fields: &[VMStateField] = unsafe { slice::from_raw_parts(VMSTATE_FOOA.fields, 5) };
// 1st VMStateField ("elem") in VMSTATE_FOOA (corresponding to VMSTATE_UINT16)
assert_eq!(
unsafe { CStr::from_ptr(foo_fields[0].name) }.to_bytes_with_nul(),
b"elem\0"
);
assert_eq!(foo_fields[0].offset, 16);
assert_eq!(foo_fields[0].num_offset, 0);
assert_eq!(foo_fields[0].info, unsafe { &vmstate_info_int8 });
assert_eq!(foo_fields[0].version_id, 0);
assert_eq!(foo_fields[0].size, 1);
assert_eq!(foo_fields[0].num, 0);
assert_eq!(foo_fields[0].flags, VMStateFlags::VMS_SINGLE);
assert!(foo_fields[0].vmsd.is_null());
assert!(foo_fields[0].field_exists.is_none());
}
#[test]
fn test_vmstate_unused() {
let foo_fields: &[VMStateField] = unsafe { slice::from_raw_parts(VMSTATE_FOOA.fields, 5) };
// 2nd VMStateField ("unused") in VMSTATE_FOOA (corresponding to VMSTATE_UNUSED)
assert_eq!(
unsafe { CStr::from_ptr(foo_fields[1].name) }.to_bytes_with_nul(),
b"unused\0"
);
assert_eq!(foo_fields[1].offset, 0);
assert_eq!(foo_fields[1].num_offset, 0);
assert_eq!(foo_fields[1].info, unsafe { &vmstate_info_unused_buffer });
assert_eq!(foo_fields[1].version_id, 0);
assert_eq!(foo_fields[1].size, 8);
assert_eq!(foo_fields[1].num, 0);
assert_eq!(foo_fields[1].flags, VMStateFlags::VMS_BUFFER);
assert!(foo_fields[1].vmsd.is_null());
assert!(foo_fields[1].field_exists.is_none());
}
#[test]
fn test_vmstate_varray_uint16_unsafe() {
let foo_fields: &[VMStateField] = unsafe { slice::from_raw_parts(VMSTATE_FOOA.fields, 5) };
// 3rd VMStateField ("arr") in VMSTATE_FOOA (corresponding to
// VMSTATE_VARRAY_UINT16_UNSAFE)
assert_eq!(
unsafe { CStr::from_ptr(foo_fields[2].name) }.to_bytes_with_nul(),
b"arr\0"
);
assert_eq!(foo_fields[2].offset, 0);
assert_eq!(foo_fields[2].num_offset, 4);
assert_eq!(foo_fields[2].info, unsafe { &vmstate_info_uint8 });
assert_eq!(foo_fields[2].version_id, 0);
assert_eq!(foo_fields[2].size, 1);
assert_eq!(foo_fields[2].num, 0);
assert_eq!(foo_fields[2].flags, VMStateFlags::VMS_VARRAY_UINT16);
assert!(foo_fields[2].vmsd.is_null());
assert!(foo_fields[2].field_exists.is_none());
}
#[test]
fn test_vmstate_varray_multiply() {
let foo_fields: &[VMStateField] = unsafe { slice::from_raw_parts(VMSTATE_FOOA.fields, 5) };
// 4th VMStateField ("arr_mul") in VMSTATE_FOOA (corresponding to
// VMSTATE_VARRAY_MULTIPLY)
assert_eq!(
unsafe { CStr::from_ptr(foo_fields[3].name) }.to_bytes_with_nul(),
b"arr_mul\0"
);
assert_eq!(foo_fields[3].offset, 6);
assert_eq!(foo_fields[3].num_offset, 12);
assert_eq!(foo_fields[3].info, unsafe { &vmstate_info_int8 });
assert_eq!(foo_fields[3].version_id, 0);
assert_eq!(foo_fields[3].size, 1);
assert_eq!(foo_fields[3].num, 16);
assert_eq!(
foo_fields[3].flags.0,
VMStateFlags::VMS_VARRAY_UINT32.0 | VMStateFlags::VMS_MULTIPLY_ELEMENTS.0
);
assert!(foo_fields[3].vmsd.is_null());
assert!(foo_fields[3].field_exists.is_none());
// The last VMStateField in VMSTATE_FOOA.
assert_eq!(foo_fields[4].flags, VMStateFlags::VMS_END);
}
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