[Vm-dev] Re: RFC: Unix 3.11.3-2116 VM
Bert Freudenberg
bert at freudenbergs.de
Tue Sep 1 15:52:56 UTC 2009
On 01.09.2009, at 17:28, Ian Piumarta wrote:
> On Sep 1, 2009, at 6:53 AM, Bert Freudenberg wrote:
>
>>> kill -USR1 12345
>> Can we add this to the VM? Helps debugging frozen images. Fully
>> patched file attached below.
>
> The Unix VM used to do exactly this. It still does, but the stack
> printing was subsumed by emergencyDump() (which, if enabled, prints
> a stack and saves an image file after SIGHUP or SIGQUIT). This also
> avoids a conflict of interest with the framebuffer driver which
> needs to use a SIGUSR.
>
> Is enabling IMAGE_DUMP in sqUnixMain.c sufficient for what you
> need? We could also have an option that names an image dump file,
> disabling the dump if no name is given but still printing the stack.
Ah, I had not noticed this code before. Cool :) Yes, enabling this
would be great.
An option to toggle it would be nice, too, though I wouldn't mind
either way.
- Bert -
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