[Xen-devel] debugging xfrd with breakpoints?

[AARON J MARKS <ajmarks@xxxxxxxxxxxxxxxxx>]

hi all,

i'd really like to trace through xc_linux_save() in xfrd (to gain insight
into how you transfer pages into dom0), but when it's under control of gdb
*and* there's a breakpoint set in xc_linux_save, the domain save fails
(most of the time):

jake % /usr/sbin/xm save ttylinux yyy
Error: errors: save failed

and by "most of the time" i mean i've seen it work a few times, but it
usually fails. without the breakpoint, xfrd can be under gdb and the save
succeedes.

is this approach even supported? i'd prefer to use a debugger to step
through the code; printfs are SO crude ;).

if you need trace or log output, just let me know.

thanks in advance,
-A.

--
Aaron Marks
Distributed Systems Lab
University of Pennsylvania
www.cis.upenn.edu/~ajmarks

"Strange women lying in ponds distributing swords is no basis
 for a system of government."


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