[Vm-dev] Debugging Squeak with GDB: "Cannot find new threads: generic error"

André Wendt andre.wendt at hpi.uni-potsdam.de
Sun Mar 23 18:01:14 UTC 2008

André Wendt wrote:
> Hi all,
> I'm trying to debug a Squeak VM I built using GDB. However, I can't even
> start up Squeak:
> $ gdb ./bld/squeak
> GNU gdb 6.7.1-debian
> Copyright (C) 2007 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later
> <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
> and "show warranty" for details.
> This GDB was configured as "i486-linux-gnu"...
> Using host libthread_db library "/lib/i686/cmov/libthread_db.so.1".
> (gdb) run squeak.image
> Starting program: /home/andre/mysqueakvm/platforms/unix/bld/squeak
> squeak.image
> [Thread debugging using libthread_db enabled]
> Error while reading shared library symbols:
> Cannot find new threads: generic error
> Cannot find new threads: generic error
> (gdb)
> Do I have to compile the VM differently in order to get it to work?

OK, I found out I *can* debug it if I start the VM normally and then
attach GDB to the running process...

I kinda wish I had tried this earlier ;-)


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