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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/usb/hcd-uhci.c
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@ -415,7 +415,7 @@ static const VMStateDescription vmstate_uhci = {
.post_load = uhci_post_load,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(dev, UHCIState),
VMSTATE_UINT8_EQUAL(num_ports_vmstate, UHCIState),
VMSTATE_UINT8_EQUAL(num_ports_vmstate, UHCIState, NULL),
VMSTATE_STRUCT_ARRAY(ports, UHCIState, NB_PORTS, 1,
vmstate_uhci_port, UHCIPort),
VMSTATE_UINT16(cmd, UHCIState),