extern const VMStateInfo vmstate_info_uint32;
extern const VMStateInfo vmstate_info_uint64;
+/** Put this in the stream when migrating a null pointer.*/
+#define VMS_NULLPTR_MARKER (0x30U) /* '0' */
+extern const VMStateInfo vmstate_info_nullptr;
+
extern const VMStateInfo vmstate_info_float64;
extern const VMStateInfo vmstate_info_cpudouble;
if (field->flags & VMS_ARRAY_OF_POINTER) {
curr_elem = *(void **)curr_elem;
}
- if (field->flags & VMS_STRUCT) {
+ if (!curr_elem) {
+ /* if null pointer check placeholder and do not follow */
+ assert(field->flags & VMS_ARRAY_OF_POINTER);
+ ret = vmstate_info_nullptr.get(f, curr_elem, size, NULL);
+ } else if (field->flags & VMS_STRUCT) {
ret = vmstate_load_state(f, field->vmsd, curr_elem,
field->vmsd->version_id);
} else {
assert(curr_elem);
curr_elem = *(void **)curr_elem;
}
- if (field->flags & VMS_STRUCT) {
+ if (!curr_elem) {
+ /* if null pointer write placeholder and do not follow */
+ assert(field->flags & VMS_ARRAY_OF_POINTER);
+ vmstate_info_nullptr.put(f, curr_elem, size, NULL, NULL);
+ } else if (field->flags & VMS_STRUCT) {
vmstate_save_state(f, field->vmsd, curr_elem, vmdesc_loop);
} else {
field->info->put(f, curr_elem, size, field, vmdesc_loop);
.put = put_uint64,
};
+static int get_nullptr(QEMUFile *f, void *pv, size_t size, VMStateField *field)
+
+{
+ if (qemu_get_byte(f) == VMS_NULLPTR_MARKER) {
+ return 0;
+ }
+ error_report("vmstate: get_nullptr expected VMS_NULLPTR_MARKER");
+ return -EINVAL;
+}
+
+static int put_nullptr(QEMUFile *f, void *pv, size_t size,
+ VMStateField *field, QJSON *vmdesc)
+
+{
+ if (pv == NULL) {
+ qemu_put_byte(f, VMS_NULLPTR_MARKER);
+ return 0;
+ }
+ error_report("vmstate: put_nullptr must be called with pv == NULL");
+ return -EINVAL;
+}
+
+const VMStateInfo vmstate_info_nullptr = {
+ .name = "uint64",
+ .get = get_nullptr,
+ .put = put_nullptr,
+};
+
/* 64 bit unsigned int. See that the received value is the same than the one
in the field */