* Remote debugging: setting breakpoints in shared libraries
@ 2012-01-31 16:17 Klaus Zeitler
2012-02-08 19:42 ` Jan Kratochvil
0 siblings, 1 reply; 4+ messages in thread
From: Klaus Zeitler @ 2012-01-31 16:17 UTC (permalink / raw)
To: gdb
Hello,
I'm trying to figure out how to debug shared libraries remotely with
gdbserver. My first try was on the same host:
[]$ gdbserver localhost:7777 test
and then in gdb:
(gdb) target remote localhost:7777
(gdb) b function_in_shared_lib
Function "function_in_shared_lib" not defined.
Make breakpoint pending on future shared library load? (y or [n]) y
(gdb) c
this works beautifully, i.e. the test program stops at the breakpoint.
Now when I try running the same sequence with gdbserver on a remote host
(and localhost replaced accordingly), gdb doesn't stop at the
breakpoint. My test program doesn't stop.
I found some cumbersome workaround. Put a breakpoint in test program
right after the shared library (dlopen) is loaded, then I manually do:
(gdb) add-symbol-file shared-lib.so <address>
Am I missing something or is this behavior to be expected?
I'm using:
GNU gdb (GDB) Red Hat Enterprise Linux (7.0.1-37.el5_7.1)
Thanks
Klaus
--
-------------------------------------------------------------------
| Klaus Zeitler Alcatel-Lucent |
| Lorenzstrasse 10 70435 Stuttgart, Germany |
| Department: Building: 005 Office: 3/171 |
| Telefon: +49 711821 43898 |
| Email: klaus.zeitler@alcatel-lucent.com |
| |
| Alcatel-Lucent Deutschland AG |
| Sitz der Gesellschaft: Stuttgart · Amtsgericht Stuttgart HRB 4026 |
| Vorsitzender des Aufsichtsrates: Michael Oppenhoff |
| Vorstand: |
| Alf Henryk Wulf (Vorsitzender) · Dr. Rainer Fechner |
-------------------------------------------------------------------
---
Those who can, do. Those who can't, simulate.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Remote debugging: setting breakpoints in shared libraries
2012-01-31 16:17 Remote debugging: setting breakpoints in shared libraries Klaus Zeitler
@ 2012-02-08 19:42 ` Jan Kratochvil
2012-02-16 12:08 ` Klaus Zeitler
0 siblings, 1 reply; 4+ messages in thread
From: Jan Kratochvil @ 2012-02-08 19:42 UTC (permalink / raw)
To: Klaus Zeitler; +Cc: gdb
On Tue, 31 Jan 2012 17:16:30 +0100, Klaus Zeitler wrote:
> Now when I try running the same sequence with gdbserver on a remote host
> (and localhost replaced accordingly), gdb doesn't stop at the
> breakpoint. My test program doesn't stop.
It may be affected for example by not yet fixed in that version:
[patch] [i386] Fix {,un}prelinked libraries for attach/core-load
http://sourceware.org/ml/gdb-patches/2011-02/msg00630.html
http://sourceware.org/ml/gdb-patches/2011-04/msg00272.html
While there exist other methods for simplicity of the troubleshooting I would
connect the remote system via NFS and use `set sysroot' to that mounted
directory.
This will ensure the local symbol files match the remote files.
Regards,
Jan
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Remote debugging: setting breakpoints in shared libraries
2012-02-08 19:42 ` Jan Kratochvil
@ 2012-02-16 12:08 ` Klaus Zeitler
2012-02-16 13:35 ` Jan Kratochvil
0 siblings, 1 reply; 4+ messages in thread
From: Klaus Zeitler @ 2012-02-16 12:08 UTC (permalink / raw)
To: Jan Kratochvil; +Cc: gdb
Hello,
>>>>> "Jan" == Jan Kratochvil <jan.kratochvil@redhat.com> writes:
Jan>
Jan> On Tue, 31 Jan 2012 17:16:30 +0100, Klaus Zeitler wrote:
>> Now when I try running the same sequence with gdbserver on a remote host
>> (and localhost replaced accordingly), gdb doesn't stop at the
>> breakpoint. My test program doesn't stop.
Jan>
Jan> It may be affected for example by not yet fixed in that version:
Jan> [patch] [i386] Fix {,un}prelinked libraries for attach/core-load
Jan> http://sourceware.org/ml/gdb-patches/2011-02/msg00630.html
Jan> http://sourceware.org/ml/gdb-patches/2011-04/msg00272.html
Jan>
Jan> While there exist other methods for simplicity of the
Jan> troubleshooting I would connect the remote system via NFS and
Jan> use `set sysroot' to that mounted directory.
The sources are distributed over a few clearcase vobs. Maybe it's
easier if I just install a newer gdb. Since the patch above is quite
new, I wonder if it already made it into the last official release (7.4)?
Thanks
Klaus
--
-------------------------------------------------------------------
| Klaus Zeitler Alcatel-Lucent |
| Lorenzstrasse 10 70435 Stuttgart, Germany |
| Department: Building: 005 Office: 3/171 |
| Telefon: +49 711821 43898 |
| Email: klaus.zeitler@alcatel-lucent.com |
| |
| Alcatel-Lucent Deutschland AG |
| Sitz der Gesellschaft: Stuttgart · Amtsgericht Stuttgart HRB 4026 |
| Vorsitzender des Aufsichtsrates: Michael Oppenhoff |
| Vorstand: |
| Alf Henryk Wulf (Vorsitzender) · Dr. Rainer Fechner |
-------------------------------------------------------------------
---
You can learn many things from children. How much patience
you have, for instance. -- Franklin P. Jones
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Remote debugging: setting breakpoints in shared libraries
2012-02-16 12:08 ` Klaus Zeitler
@ 2012-02-16 13:35 ` Jan Kratochvil
0 siblings, 0 replies; 4+ messages in thread
From: Jan Kratochvil @ 2012-02-16 13:35 UTC (permalink / raw)
To: Klaus Zeitler; +Cc: gdb
On Thu, 16 Feb 2012 13:07:08 +0100, Klaus Zeitler wrote:
> Jan> It may be affected for example by not yet fixed in that version:
> Jan> [patch] [i386] Fix {,un}prelinked libraries for attach/core-load
> Jan> http://sourceware.org/ml/gdb-patches/2011-02/msg00630.html
> Jan> http://sourceware.org/ml/gdb-patches/2011-04/msg00272.html
> Jan>
> Jan> While there exist other methods for simplicity of the
> Jan> troubleshooting I would connect the remote system via NFS and
> Jan> use `set sysroot' to that mounted directory.
>
> The sources are distributed over a few clearcase vobs.
Source files do not matter for GDB operations, they are only displayed to the
user. Library files (*.so*) matter for breakpoints placing/hit.
> Maybe it's
> easier if I just install a newer gdb. Since the patch above is quite
> new, I wonder if it already made it into the last official release (7.4)?
Yes; you can see the patch in gdb/ChangeLog there.
Regards,
Jan
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2012-02-16 13:35 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2012-01-31 16:17 Remote debugging: setting breakpoints in shared libraries Klaus Zeitler
2012-02-08 19:42 ` Jan Kratochvil
2012-02-16 12:08 ` Klaus Zeitler
2012-02-16 13:35 ` Jan Kratochvil
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).