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vmstate: error hint for failed equal checks

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In some cases a failing VMSTATE_*_EQUAL does not mean we detected a bug,
but it's actually the best we can do. Especially in these cases a verbose
error message is required.

Let's introduce infrastructure for specifying a error hint to be used if
equal check fails. Let's do this by adding a parameter to the _EQUAL
macros called _err_hint. Also change all current users to pass NULL as
last parameter so nothing changes for them.

Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com>

Message-Id: <20170623144823.42936-1-pasic@linux.vnet.ibm.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Halil Pasic 2017-06-23 16:48:23 +02:00 • committed by Juan Quintela
parent 01f6e14c78
commit d2164ad35c
20 changed files with 74 additions and 40 deletions
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2
hw/input/vmmouse.c
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@ -243,7 +243,7 @@ static const VMStateDescription vmstate_vmmouse = {
.minimum_version_id = 0,
.post_load = vmmouse_post_load,
.fields = (VMStateField[]) {
VMSTATE_INT32_EQUAL(queue_size, VMMouseState),
VMSTATE_INT32_EQUAL(queue_size, VMMouseState, NULL),
VMSTATE_UINT32_ARRAY(queue, VMMouseState, VMMOUSE_QUEUE_SIZE),
VMSTATE_UINT16(nb_queue, VMMouseState),
VMSTATE_UINT16(status, VMMouseState),