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threads/2292: GDB process stops when debugging threaded program

From: Oleg V.Zhylin <vz at yahoo dot com>
To: gdb-gnats at sources dot redhat dot com
Cc: Jim Blandy <jimb at codesourcery dot com>
Date: 28 Jul 2007 00:07:37 -0000
Subject: threads/2292: GDB process stops when debugging threaded program
Reply-to: Oleg V.Zhylin <vz at yahoo dot com>

>Number:         2292
>Category:       threads
>Synopsis:       GDB process stops when debugging threaded program
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jul 28 00:08:01 UTC 2007
>Closed-Date:
>Last-Modified:
>Originator:     Oleg V. Zhylin <vz@yahoo.com>
>Release:        GDB CVS 2007-7-27
>Organization:
>Environment:
Fedora Core 7
>Description:
The attached program makes GDB itself stop when run.
>How-To-Repeat:
Hi Jim,

  pthread_test.cpp demonstrates the problematic behavior. It is built
using

 g++ -g pthread_test.cpp -lpthread

 The version numbers are

$ cat /proc/version
Linux version 2.6.21-1.3228.fc7
(kojibuilder@xenbuilder2.fedora.redhat.com) (gcc version 4.1.2 20070502
(Red Hat 4.1.2-12)) #1 SMP Tue Jun 12 15:37:31 EDT 2007

and gdb snapshot for July 24th

$ gdb --version
GNU gdb 6.6.50.20070724

Below is the log of gdb session

$ gdb a.out
GNU gdb 6.6.50.20070724
Copyright (C) 2007 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and
you are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for
details.
This GDB was configured as "i686-pc-linux-gnu"...
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) run
Starting program: /home/cartcs/Work/gdb/pthread_create/a.out
[Thread debugging using libthread_db enabled]
[New Thread 0xb7f336d0 (LWP 22251)]

[3]+  Stopped                 gdb a.out
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: text/x-c++src; name="pthread_test.cpp"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="pthread_test.cpp"

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