GDB does not work on DMTCP restart.

[Piotr Czak <piotr.czak@gmail.com>]

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Hello everyone,

My name is Piotr and I'd like to ask for suggestions and help with one issue
I have.

I'm using DMTCP to save a checkpoint of some applications and restart from it.
In some cases I need to use gdb to debug issues. I noticed that in one design
gdb does not see debug symbols when used after the restart from a checkpoint.
It works on "save" when executed under the DMTCP when the checkpoint is
created but not after restarting from it. This is happening
only on some tests to which I have limited access. In that case gdb cannot
connect current application location with sources, it shows me wrong but
always the same location.
I can set a breakpoint but it is never hit even if I know that this part of the
code is executed. From the log I see that gdb thinks that my function
is in some
file which is not correct. If I remember well, the line number in the
log message
was correct.
I also cannot display variables.
The result of sharedlibrary command is empty.
In case of issues I'm not able to do any debugging. All of these debug
features work when I try to save DMTCP checkpoint.

Unfortunately, since it is related to my work I cannot provide more
detailed information but I will be grateful if you could provide me with
some suggestions  what could be a reason for the issue or how to debug the
issue.

Thanks,
Best Regards,
Piotr