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Re: threads/2149: thread_db_get_info: cannot get thread info: genericerror on fork()/execvp()
- From: Alex Bligh <alex at alex dot org dot uk>
- To: nobody at sources dot redhat dot com
- Cc: gdb-prs at sources dot redhat dot com,
- Date: 13 Aug 2006 20:18:01 -0000
- Subject: Re: threads/2149: thread_db_get_info: cannot get thread info: genericerror on fork()/execvp()
- Reply-to: Alex Bligh <alex at alex dot org dot uk>
The following reply was made to PR threads/2149; it has been noted by GNATS.
From: Alex Bligh <alex@alex.org.uk>
To: Daniel Jacobowitz <drow@false.org>
Cc: "Matthew M. DeLoera" <mdeloera@exacq.com>,
gdb-gnats@sources.redhat.com
Subject: Re: threads/2149: thread_db_get_info: cannot get thread info: generic
error on fork()/execvp()
Date: Sun, 13 Aug 2006 21:10:18 +0100
Daniel Jacobowitz wrote:
> This should now be fixed in the CVS repository, at least as long as you
> aren't trying to follow the child of the fork. Could you give it a
> try?
Apologies for the late response. I can confirm that this is
*NOT* fixed. However, the symptom has changed. Using
GNU gdb 6.5.50.20060813-cvs, the error I get is
"Couldn't get registers: No such process." - this is
with follow-fork-mode set to parent.
With the original version of gdb (GNU gdb 6.4-debian, from
Ubuntu Dapper), I get:
thread_db_get_info: cannot get thread info: generic error
(as originally reported).
So you are somewhere near the error, but not quite there.
I've also confirmed the original bug on both i386 and x86_64 Linux.
I can replicate this 100% of the time (on my own, large, app,
naturally, as having a simple sample to do it would make things
much too easy). Get any version of Xara Xtreme from
http://www.xaraxtreme.org/
and run it under gdb. Whenever it executes an external program,
it hangs under gdb. The easiest case is to install imagemagick,
draw anything, then try an export a PSD file. If you've
installed from a package, loading any file will do it as
the extensible filter system will try executing one of the
filters.
Alex