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[[!meta copyright="Copyright © 2010 Free Software Foundation, Inc."]]
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# Existing
We have debugging infrastructure. For example:
* [[GDB]]
* [[GNU Mach debugging|microkernel/mach/gnumach/debugging]]
* [[GNU Hurd debugging|hurd/debugging]], including
[[hurd/debugging/rpctrace]] and more.
# To Do
* [[ltrace]]
* [[latrace]]
* [[profiling]]
* *[Checkpoint/restart](http://lwn.net/Articles/412749/) allows the state of
a set of processes to be saved to persistent storage, then restarted at
some future time* -- quoting from Jonathan Corbet's 2010 Linux Kernel
Summit report.
This is surely a very useful facility to have for reproducing failures, for
example. But on the other hand it's questionable how it can help with
debugging failures in [[GNU Hurd server|hurd/translator]]s' interactions,
as their state is typically spread between several processes.
* [[locking]]
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