From: Andy Crichton (andy.crichton@abibuildingdata.com)
Date: Tue May 20 2003 - 06:31:35 EDT
Hello,
I have an oracle pro*c program which has an issue with threading/signals.
It is running on an E450 - 5.7 Generic_106541-18 sun4u sparc SUNW,Ultra-4
and is linked with libclntsh.so.8.0 (oracle client library) and
libthread.so.1
It outputs the following:
libthread panic: _deliversigs: _lwp_kill : dumping core (PID: 6860 LWP
1229148)
stacktrace:
febd0dfc
febd96c8
fe98fe54
14b08
12bf4
120a0
11ffc
11d68
0
Program received signal SIGABRT, Aborted.
0xfebd9d88 in __sigprocmask () from /usr/lib/libthread.so.1
Oracle's libclntsh.so uses threads to manage the oracle connections. A
backtrace indicates that this happens during a system() call in the code:
#0 0xfebd9d88 in __sigprocmask () from /usr/lib/libthread.so.1
#1 0xfebcecb0 in _deliversigs () from /usr/lib/libthread.so.1
#2 0xfebd0e04 in thr_sigsetmask () from /usr/lib/libthread.so.1
#3 0xfebd96d0 in sigprocmask () from /usr/lib/libthread.so.1
#4 0xfe98fe5c in system () from /usr/lib/libc.so.1
Oracle says that unless I create threads in my code then I do not need to
worry about threading issues but it looks to me like there is something
happening during the system() call (which is not thread safe). I have
replicated this problem on a solaris 8 machine with a different version of
the oracle shared client library and with the sun compiler but to exactly
the same effect.
My question is:
Q.) Is this a problem which will be solved by patches for the thread library
or is it not possible to safely call system() in a program with libcltnsh.so
and libthread.so without some kind of locking.
Many thanks in advance for any information you may have. I will summarize.
Andy Crichton
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