[XenAccess-devel] linux_predict_sysmap_name called twice?

[Daniele S. <da...@ya...>]

Hi, 
I've recently downloaded the XenAccess library which I think is very nice and useful: I'd like to build something like an IDS for XEN using XenAccess with Libvirt ...it's only an idea for now :)
I've tried to use the process_list program (modified so that it can work with any domain ID), but there are some little problems; I've put some printf at the begin and at the end of each function called and this is the resulting tree (the command is ./run ./process-list 2):

xa_init begin
xa_init end
helper_init
1)    linux_predict_sysmap_name begin
                  linux_get_xml_info begin
                             virConnectOpenReadOnly
                             virDomainLookupByID
                             virDomainFree = [0]
                             virConnectClose = [0]
                  linux_get_xml_info end
    linux_predict_sysmap_name kernel=[/boot/vmlinuz-2.6.16-xen]
    linux_predict_sysmap_name end sysmap=[/boot/System.map-2.6.16-xen]
    linux_system_map_symbol_to_address begin
    linux_system_map_symbol_to_address end
helper_init end
xa_access_kernel_symbol begin
            linux_access_kernel_symbol begin
2)                           linux_predict_sysmap_name begin
                                         linux_get_xml_info begin
                                                virConnectOpenReadOnly
                                                virDomainLookupByID
                                                    (0) (null)
                                                    ERROR: Failed to find Domain 2
                                                virConnectClose = [0]
                                         linux_get_xml_info end
                                         ERROR: failed to get domain info for domain id 2
                                         ERROR: could not get kernel name for domain id 2
                           linux_predict_sysmap_name end sysmap=[(null)]
                           linux_system_map_symbol_to_address begin
                           fopen system map [(null)] error
                           linux_system_map_symbol_to_address end
            xa_access_kernel_symbol end failure
failed to get process list head: Bad address

I see that linux_predict_sysmap_name is called twice: when it's invoked the second time, there is a problem with virDomainLookupByID: probably it could be a libVirt error (for example a pointer not updated, I'm using the latest version which is now 0.1.3).
Is it possible to save the information obtained the first time by linux_get_xml_info so that the second time it's not necessary to call it again? Probably I still don't have a clear view of all the code :)
Thanks!
Daniele
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