* Re: wrong backtrace / __JCR_LIST__ instead of real function name
@ 2003-10-21 14:21 Michael Elizabeth Chastain
0 siblings, 0 replies; 3+ messages in thread
From: Michael Elizabeth Chastain @ 2003-10-21 14:21 UTC (permalink / raw)
To: gdb, Markus.Kremer
Hello,
Try gdb 6.0, which has improved backtracing in system calls.
Michael C
GDB QA Guy
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: wrong backtrace / __JCR_LIST__ instead of real function name
2003-10-21 11:05 Kremer Markus (MPI/SFR)
@ 2003-10-21 12:54 ` Daniel Jacobowitz
0 siblings, 0 replies; 3+ messages in thread
From: Daniel Jacobowitz @ 2003-10-21 12:54 UTC (permalink / raw)
To: Kremer Markus (MPI/SFR); +Cc: 'gdb@sources.redhat.com'
On Tue, Oct 21, 2003 at 01:05:34PM +0200, Kremer Markus (MPI/SFR) wrote:
> Hello,
> i am using gcc 3.2 and gdb 5.3.
> One thread of my programm calls
> pthread_start_thread->wrapper_routine->acom_loop->acom->acom_read->select.
>
> When i debug my application i get strange backtraces.
> instead of acom_read() __JCR_LIST__() is displayed in frame #1.
>
> I had similar problems at other places in my code.
> When i used gcc 2.9x and gdb 5.2 i had the same problems.
>
> Any clues what went wrong?
> ....
> pressing CTRL-C
> ....
> Program received signal SIGINT, Interrupt.
> [Switching to Thread 3076 (LWP 26480)]
> 0x401ad6ae in select () from
> //app/i33tools/gcc/gcc-3.2c/i386-linux/lib/libc.so.6
> (gdb) bt
> #0 0x401ad6ae in select () from
> //app/i33tools/gcc/gcc-3.2c/i386-linux/lib/libc.so.6
> #1 0x0805e9cc in __JCR_LIST__ ()
This means GDB couldn't figure out how to backtrace from select. It's
an assembly wrapper, so it's hard to manually figure out the frame
location.
Recent versions of gdb and binutils support annotating assembly
functions to describe the backtrace. Most libc functions will
eventually be annotated, since NPTL uses this information also.
--
Daniel Jacobowitz
MontaVista Software Debian GNU/Linux Developer
^ permalink raw reply [flat|nested] 3+ messages in thread
* wrong backtrace / __JCR_LIST__ instead of real function name
@ 2003-10-21 11:05 Kremer Markus (MPI/SFR)
2003-10-21 12:54 ` Daniel Jacobowitz
0 siblings, 1 reply; 3+ messages in thread
From: Kremer Markus (MPI/SFR) @ 2003-10-21 11:05 UTC (permalink / raw)
To: 'gdb@sources.redhat.com'
Hello,
i am using gcc 3.2 and gdb 5.3.
One thread of my programm calls
pthread_start_thread->wrapper_routine->acom_loop->acom->acom_read->select.
When i debug my application i get strange backtraces.
instead of acom_read() __JCR_LIST__() is displayed in frame #1.
I had similar problems at other places in my code.
When i used gcc 2.9x and gdb 5.2 i had the same problems.
Any clues what went wrong?
....
pressing CTRL-C
....
Program received signal SIGINT, Interrupt.
[Switching to Thread 3076 (LWP 26480)]
0x401ad6ae in select () from
//app/i33tools/gcc/gcc-3.2c/i386-linux/lib/libc.so.6
(gdb) bt
#0 0x401ad6ae in select () from
//app/i33tools/gcc/gcc-3.2c/i386-linux/lib/libc.so.6
#1 0x0805e9cc in __JCR_LIST__ ()
#2 0x0804ca76 in acom (fd=16, text=0x8062704 "ABCDEABCDE", len=10,
timeout=3)
at
/net/fr145117/tux_snv/choral.km82fr.linux-snv/vobs/choral/software/RemoteV24
/src/handler_acom.c:182
#3 0x0804cc92 in acom_loop (arg=0x80627b0)
at
/net/fr145117/tux_snv/choral.km82fr.linux-snv/vobs/choral/software/RemoteV24
/src/handler_acom.c:282
#4 0x08053ff3 in wrapper_routine (data=0xbfffe8d0)
at
/net/fr145117/tux_snv/choral.km82fr.linux-snv/vobs/choral/software/RemoteV24
/src/mytools.c:1051
#5 0x400ccba3 in pthread_start_thread () from
//app/i33tools/gcc/gcc-3.2c/i386-linux/lib/libpthread.so.0
#6 0x400cd66e in pthread_start_thread_event () from
//app/i33tools/gcc/gcc-3.2c/i386-linux/lib/libpthread.so.0
(gdb) up
#1 0x0805e9cc in __JCR_LIST__ ()
(gdb) up
#2 0x0804ca76 in acom (fd=16, text=0x8062704 "ABCDEABCDE", len=10,
timeout=3)
at
/net/fr145117/tux_snv/choral.km82fr.linux-snv/vobs/choral/software/RemoteV24
/src/handler_acom.c:182
182 r = acom_read (fd, timeout);
(gdb) list
177 acom_send (fd, text, len);
178 s = state_repeat1;
179 };
180 break;
181 case state_repeat1:
182 r = acom_read (fd, timeout);
183 if (r == ACK)
184 {
185 result = V24_OK;
186 s = state_end;
(gdb) p acom_read
$1 = {char (int, int)} 0x804c850 <acom_read>
best regards
Markus
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2003-10-21 14:21 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2003-10-21 14:21 wrong backtrace / __JCR_LIST__ instead of real function name Michael Elizabeth Chastain
-- strict thread matches above, loose matches on Subject: below --
2003-10-21 11:05 Kremer Markus (MPI/SFR)
2003-10-21 12:54 ` Daniel Jacobowitz
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).