OCCI client application crashing, when implemented in a shared library

Question

Dear All,
I have a problem running my Oracle C++ client using OCCI.
The client crashes when it tries to call the OCCI createConnection method.
The crash happen only if the connection method is implemented inside of an object that it is build in a shared library, which after it is linked to the main program. If I implement everything in the main function the crash does not happen.
I am building and running my client on SLES9 service pack 2 (Linux kernel 2.6.5) using Oracle 10.2g (10.2.0.1) and gcc 3.3.3, glibc 2.3.3 and libaio-0.3 and libaio-devel-0.3.
==================================================
Attaching the core with gdb, I get the following stack:
#0 0x400c2f4e in parse_lsda_header () from /usr/lib/libstdc++.so.5
#1 0x400c324c in __gxx_personality_v0 () from /usr/lib/libstdc++.so.5
#2 0x40111454 in UnwindRaiseException () from /lib/libgcc_s.so.1
#3 0x401115dc in UnwindResume_or_Rethrow () from /lib/libgcc_s.so.1
#4 0x400c368f in __cxa_rethrow () from /usr/lib/libstdc++.so.5
#5 0x40284b8a in TAG_PACKET_38 () from /home/oracle/app/10.2g/lib/libocci.so.10.1
#6 0x402819da in ZN6oracle4occi14ConnectionImplC9EPNS015EnvironmentImplERKSsS5_S5_ () from /home/oracle/app/10.2g/lib/libocci.so.10.1
#7 0x4028606f in oracle::occi::ConnectionImpl::ConnectionImpl () from /home/oracle/app/10.2g/lib/libocci.so.10.1
#8 0x4028074b in oracle::occi::EnvironmentImpl::createConnection () from /home/oracle/app/10.2g/lib/libocci.so.10.1
#9 0x4001ba2a in oralib::connect (this=0x804a008) at oraclelib.cpp:46
#10 0x08048a27 in main () at oramain.cpp:14
When, I run my client with valgrind that the output is the following:
oracle@nemesis:~/app/10.2g/rdbms/demo/parc_example> valgrind ./oramain
==32212== Memcheck, a memory error detector.
==32212== Copyright (C) 2002-2007, and GNU GPL'd, by Julian Seward et al.
==32212== Using LibVEX rev 1732, a library for dynamic binary translation.
==32212== Copyright (C) 2004-2007, and GNU GPL'd, by OpenWorks LLP.
==32212== Using valgrind-3.2.3, a dynamic binary instrumentation framework.
==32212== Copyright (C) 2000-2007, and GNU GPL'd, by Julian Seward et al.
==32212== For more details, rerun with: -v
==32212==
=== Calling init()
*** Creating the environment...
- m_env = 0x5390318
done!
=== Calling connect()
*** Connecting using following setting:
- user : SCOTT
- passwd : TIGER
- connString :
==32213==
==32213== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 32 from 1)
==32213== malloc/free: in use at exit: 724,565 bytes in 377 blocks.
==32213== malloc/free: 611 allocs, 234 frees, 757,833 bytes allocated.
==32213== For counts of detected errors, rerun with: -v
==32213== searching for pointers to 377 not-freed blocks.
==32213== checked 1,912,228 bytes.
==32213==
==32213== LEAK SUMMARY:
==32213== definitely lost: 39 bytes in 1 blocks.
==32213== possibly lost: 3,030 bytes in 2 blocks.
==32213== still reachable: 721,496 bytes in 374 blocks.
==32213== suppressed: 0 bytes in 0 blocks.
==32213== Rerun with --leak-check=full to see details of leaked memory.
==32212== Invalid read of size 1
==32212== at 0x40CAF4E: parse_lsda_header(_Unwind_Context*, unsigned char const*, lsda_header_info*) (in /usr/lib/libstdc++.so.5.0.6)
==32212== by 0x40CB24B: __gxx_personality_v0 (in /usr/lib/libstdc++.so.5.0.6)
==32212== by 0x411A453: UnwindRaiseException (in /lib/libgcc_s.so.1)
==32212== by 0x411A5DB: UnwindResume_or_Rethrow (in /lib/libgcc_s.so.1)
==32212== by 0x40CB68E: __cxa_rethrow (in /usr/lib/libstdc++.so.5.0.6)
==32212== by 0x428CB89: oracle::occi::ConnectionImpl::openConnection(OCIEnv*, OCIError*, void*, unsigned, void*, unsigned, void*, unsigned, void*, unsigned, unsigned) (
in /home/oracle/app/10.2g/lib/libocci.so.10.1)
==32212== by 0x42899D9: ZN6oracle4occi14ConnectionImplC9EPNS015EnvironmentImplERKSsS5_S5_ (in /home/oracle/app/10.2g/lib/libocci.so.10.1)
==32212== by 0x428E06E: oracle::occi::ConnectionImpl::ConnectionImpl(oracle::occi::EnvironmentImpl*, std::string const&, std::string const&, std::string const&) (in /ho
me/oracle/app/10.2g/lib/libocci.so.10.1)
==32212== by 0x428874A: oracle::occi::EnvironmentImpl::createConnection(std::string const&, std::string const&, std::string const&) (in /home/oracle/app/10.2g/lib/liboc
ci.so.10.1)
==32212== by 0x4023A29: oralib::connect() (oraclelib.cpp:46)
==32212== by 0x8048A26: main (oramain.cpp:14)
==32212== Address 0x123 is not stack'd, malloc'd or (recently) free'd
==32212==
==32212== Process terminating with default action of signal 11 (SIGSEGV)
==32212== Access not within mapped region at address 0x123
==32212== at 0x40CAF4E: parse_lsda_header(_Unwind_Context*, unsigned char const*, lsda_header_info*) (in /usr/lib/libstdc++.so.5.0.6)
==32212== by 0x40CB24B: __gxx_personality_v0 (in /usr/lib/libstdc++.so.5.0.6)
==32212== by 0x411A453: UnwindRaiseException (in /lib/libgcc_s.so.1)
==32212== by 0x411A5DB: UnwindResume_or_Rethrow (in /lib/libgcc_s.so.1)
==32212== by 0x40CB68E: __cxa_rethrow (in /usr/lib/libstdc++.so.5.0.6)
==32212== by 0x428CB89: oracle::occi::ConnectionImpl::openConnection(OCIEnv*, OCIError*, void*, unsigned, void*, unsigned, void*, unsigned, void*, unsigned, unsigned) (
in /home/oracle/app/10.2g/lib/libocci.so.10.1)
==32212== by 0x42899D9: ZN6oracle4occi14ConnectionImplC9EPNS015EnvironmentImplERKSsS5_S5_ (in /home/oracle/app/10.2g/lib/libocci.so.10.1)
==32212== by 0x428E06E: oracle::occi::ConnectionImpl::ConnectionImpl(oracle::occi::EnvironmentImpl*, std::string const&, std::string const&, std::string const&) (in /ho
me/oracle/app/10.2g/lib/libocci.so.10.1)
==32212== by 0x428874A: oracle::occi::EnvironmentImpl::createConnection(std::string const&, std::string const&, std::string const&) (in /home/oracle/app/10.2g/lib/liboc
ci.so.10.1)
==32212== by 0x4023A29: oralib::connect() (oraclelib.cpp:46)
==32212== by 0x8048A26: main (oramain.cpp:14)
==32212==
==32212== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 32 from 1)
==32212== malloc/free: in use at exit: 680,744 bytes in 222 blocks.
==32212== malloc/free: 616 allocs, 394 frees, 760,162 bytes allocated.
==32212== For counts of detected errors, rerun with: -v
==32212== searching for pointers to 222 not-freed blocks.
==32212== checked 1,870,208 bytes.
==32212==
==32212== LEAK SUMMARY:
==32212== definitely lost: 132 bytes in 1 blocks.
==32212== possibly lost: 960 bytes in 1 blocks.
==32212== still reachable: 679,652 bytes in 220 blocks.
==32212== suppressed: 0 bytes in 0 blocks.
==32212== Rerun with --leak-check=full to see details of leaked memory.
Segmentation fault
Any Idea?
Thanks in advance and Regards

Answer 1

Dear All,
I found the solution.
It is enough to add the build flag: "-fPIC" to the g++