I'm trying to debug a multi-threaded application running inside a VM, both live and in replay mode. The VM is running RHEL 5, kernel 2.6.18-164-2-1. I've tried running the remote gdb on the host for this VM (also a RHEL 5 machine) as well as a Ubuntu 8.04 box. The results in both cases were identical. I'm running VMWare Workstation 6.5.3.

I can attach to the VM and, after issuing the "monitor linuxoffsets" command, see all processes. I can switch between them using the 'thread' command. However, I can't see backtraces. I suspect this is because the symbols aren't being loaded properly.

If I try to debug a live application, gdb makes no attempt to load the symbols at all, no matter what I do.

If I try to debug a replay session, gdb does attempt to load the symbols after I issue the "target remote" command. However, it looks for them on the machine where gdb is running, not on the guest being debugged. I have tried copying all required libraries to the machine where gdb is running and setting the solib-search-path and solib-absolute-prefix options. If I do that, gdb claims to successfully load all the symbols from the libraries, but the stacks are for the most part mangled. If I try to set breakpoints, they never get triggered.

I was wondering what is the correct procedure to get this to work. The User Manual has instructions for some of this, but they seem to be for Windows. gdb and Linux aren't at all mentioned.

Thanks,

Ray