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gdb output problems when run in shell (bash or ksh)
- From: Klaus Zeitler <kzeitler at lucent dot com>
- To: gdb at sources dot redhat dot com
- Date: Tue, 02 Aug 2005 11:03:52 +0200
- Subject: gdb output problems when run in shell (bash or ksh)
Hello,
I'm trying to debug a program with more than 100 threads under Solaris 5.8,
that generates lots of output. When I run the program under gdb in bash,
the first few threads are started, then gdb suspends itself and I need to
call 'fg' to resume execution, i.e. the whole thing looks like e.g.:
[674]$ gdb ./umc.vx
GNU gdb 6.3.0.20050704-cvs
...
[New LWP 27]
UMC1-1-> [07-05 10:05:41:932930] (tMain ) : Smdev: SMDEV initialization succeeded!
[New LWP 28]
logMsg [07-05 10:05:42:849879] (FireWire ) : PetDemon create Server socket on port 45263
UMC1-1-> [07-05 10:05:42:870024] 0x13dd7d0 (tFtpdTask ) : waiting for a new client connection...
UMC1-1-> [07-05 10:05:42:981463] 0x7277b0 (tMain ) : Initializing OSipc
[6]+ Stopped gdb ./umc.vx
[675]$ fg
gdb ./umc.vx
---Type <return> to continue, or q <return> to quit---
[New LWP 29]
logMsg [07-05 10:20:36:924936] (nbapDemon ) : PetDemon create Server socket on port 45260
...
When run in ksh, gdb isn't put in background. Instead after quite a few lines
of output from the image interspersed with gdb output lines "[New LWP <nn>]",
ksh seems to hang. Top then shows that both gdb and ksh are both running at
approximately 50% CPU.
But when I run the program in emacs or ddd, I don't have any problems. Since
this always happens while gdb is trying to print more than 200 times "[New LWP
<nn>]", maybe we have a problem with both gdb and the image printing at the
same time.
I'd appreciate any help. Thanks
Klaus
--
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| Klaus Zeitler Lucent Technologies |
| Email: kzeitler@lucent.com |
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