Attaching and inspecting crash with gdb

[Devrim Erdem]

Hello,

Classic problem. Customer uses software heavily. Software crashes from
time to time. No core dumps.

Is there a way of attaching and application and ask gdb to write a
core dump ( or any kind of dump of data ) which I could later load in
gdb to debug the problem remotely.

If this is not possible, I will need to implement my current solution.

The current not so elegant way:
=============================
In my crash crash handler, I simply run a small python script which
attaches gdb to the currently crashed application.

So far I can use the command line argument "--command" to specify
commands like printing the current stack trace. But I need more
information about the crash such as the value of data at the point of
crash.

I would like to be able to tell gdb to do:

For each thread
    For each frame ( n to 0 )
       print values of all data of the current frame

Then the user sends this text to me and then I can try to figure out
the problem.

But at the moment I can not tell gdb to do a "for" loop for threads
and frames. Is this possible or is there another way of getting the
same kind of information.

Thanks in advance,

Devrim.