Re: [Qemu-devel] [PULL for-2.9 1/3] coroutine: remove GThread implementation

[Eric Blake]

On 05/12/2017 09:37 AM, Stefan Hajnoczi wrote:
> From: "Daniel P. Berrange" <address@hidden>
> 
> The GThread implementation is not functional enough to actually
> run QEMU reliably. While it was potentially useful for debugging,
> we have a scripts/qemugdb/coroutine.py to enable tracing of
> ucontext coroutines in GDB, so that removes the only reason for
> GThread to exist.
> 

Quick question (unrelated to the pull request): Can we get a patch to
scripts/qemugdb/coroutine.py or nearby that mentions the preferred way
to actually use the script?  I didn't know the script existed before
seeing this commit message, and was sad to see that it was not
self-documenting (or else a scripts/qemugdb/README file) on how best to
utilize the script (is it as simple as running 'gdb --some-arg
/path/to/coroutine.py'? do you have to install some magic file to tell
gdb to autoload the file any time you are debugging qemu? something
else???).

Okay, I searched a bit harder, and found that scripts/qemu-gdb.py loads
these subscripts, if you type 'source scripts/qemu-gdb.py' at the (gdb)
prompt.  Still, is there a way to automate that so that the scripts are
loaded every time you fire up gdb, instead of having to remember to do
it by hand? And if so, can that be documented?

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

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