Date: Wed, 25 May 2011 21:35:28 -0300 From: Raphael Kubo da Costa <kubito@gmail.com> To: freebsd-hackers@freebsd.org Subject: Re: Problem with running simple pthreads program under gdb-7.2 (Invalid selected thread) Message-ID: <87pqn6jo33.fsf@gmail.com> References: <BANLkTikfUObTtRAaMVFdG_-0e39ibB5GLg@mail.gmail.com>
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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. This is 8.2-STABLE.
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