Date: Thu, 26 May 2011 09:27:24 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-hackers@freebsd.org Cc: Raphael Kubo da Costa <kubito@gmail.com> Subject: Re: Problem with running simple pthreads program under gdb-7.2 (Invalid selected thread) Message-ID: <201105260927.24922.jhb@freebsd.org> In-Reply-To: <87pqn6jo33.fsf@gmail.com> References: <BANLkTikfUObTtRAaMVFdG_-0e39ibB5GLg@mail.gmail.com> <87pqn6jo33.fsf@gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wednesday, May 25, 2011 8:35:28 pm Raphael Kubo da Costa wrote: > Dmitry Krivenok <krivenok.dmitry@gmail.com> writes: > > > As you can see program exited normally w/o any errors. > > Then I run the same program under gdb-7.2 > > > > $ /usr/local/bin/gdb72 --args t > > GNU gdb (GDB) 7.2 [GDB v7.2 for FreeBSD] > > Copyright (C) 2010 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 "x86_64-portbld-freebsd8.2". > > For bug reporting instructions, please see: > > <http://www.gnu.org/software/gdb/bugs/>... > > Reading symbols from /big/work/coverage/csxroot/src/t/t...done. > > (gdb) r > > Starting program: /big/work/coverage/csxroot/src/t/t > > [New LWP 100162] > > [New Thread 800a041c0 (LWP 100162)] > > [New Thread 800a0ae40 (LWP 100171)] > > [Thread 800a0ae40 (LWP 100171) exited] > > Invalid selected thread. > > (gdb) q > > A debugging session is active. > > > > Inferior 1 [process 7756] will be killed. > > > > Quit anyway? (y or n) y > > $ > > > > In this case I got "Invalid selected thread." right after the thread has exited. > > Looks like gdb is unable to switch to another thread. > > In my case, I get the following error when running your program (and > many others) with the gdb72 package (installed via portmaster -PP > devel/gdb): > > (gdb) r > Starting program: /tmp/test-base > [New LWP 100315] > Cannot get thread info, Thread ID=100315, generic error > (gdb) q > A debugging session is active. > > Inferior 1 [process 84832] will be killed. > > Quit anyway? (y or n) y > > If I compile the port myself, I can't run any binary (PR ports/152896, > which has been unanswered despite my efforts): > > Reading symbols from /usr/local/bin/gdb72...I'm sorry, Dave, I can't > do that. Symbol format `elf64-x86-64-freebsd' unknown. You need to unininstall libreadline, or turn off the hack to try to use libreadline from ports. There is no easy way to fix the gdb build to use /usr/local only for the bits that need readline and not have it use the wrong binutils headers from /usr/local as well. -- John Baldwin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201105260927.24922.jhb>