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xen-devel
Re: [Xen-devel] debugging libxc / builders
Tim Newsham wrote:
Hi,
I'm playing with the builders in libxc. I am having trouble
debugging the thing. I was wondering what options I have.
- When I run 'xm create', what process calls down to the
xc_builder stuff? Can I attach to it with gdb?
Xend (the daemon) actually calls the xc_XXX_build function. The C
invocation occurs in the xc bindings. I'm not aware of an easy way to
attach to bindings with gdb (although I presume it's possible).
Any hints or tips appreciated.
It would probably be significantly easier to debug builder issues with
VM-Tools. There's a single executable (vm-build.linux for instance)
that only does building and can be stepped through with gdb.
Of course, you could also write your own really simple app with libxc
that just did a few calls to create and build the domain. You don't
need any of the control channel stuff until the domain starts to
actually boot.
I can give you a more detailed example if you need.
Regards,
Anthony Liguori
Tim Newsham
http://www.lava.net/~newsham/
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