problem in dynamic casting with gcc 3.2.1

["Chandra, Lokesh" <lchandra at pactolus dot com>]

Hello,

We are having run time problems with the code built in gcc version 3.2.1 on
solaris systems. However the same source code works fine with gcc version
2.95.3 and other compilers like VC++.


Brief synopsis about the code:-

There are two dynamically loaded libraries. An object ( PS_MyMsg ) is
created in one of the library (my_msg_lib.cpp) and "smart" pointer (
PCA_Ptr<IPSMessage> ) to one of object's interfaces is passed on to the
other library(my_pac_lib.cpp). The second library (my_pac_lib.cpp) tries to
cast this pointer to another interface ( PCA_Ptr<IPSMsgParameters> ) of that
object and fails.

There is a commented section in my_main.cpp (class RuntimeSite). This
section does the same casting as the second library(my_pac_lib.cpp). If this
section is uncommented, casting succeeds here and in such case, casting
succeeds in the second library (my_pac_lib.cpp) too. 

If this section is commented then the test fails to cast in the second
library (my_pac_lib.cpp).



I'm attaching a zipped file which contains .cpp and .h files. It also has a
small "make_me" file.

Instructions to view the problem:-
1. unzip the files to any directory.
2. run make_me. This will generate two .so files and my_test executable.
3. run my_test and it fails to do dynamic casting.
4. The same set of files could be built with gcc version 2.95.3 and run
successfully.



The following are configuration information about the compiler and the
system:-

gcc --v
Reading specs from /usr/local/lib/gcc-lib/sparc-sun-solaris2.8/3.2.1/specs
Configured with: ../configure --disable-nls --with-as=/usr/ccs/bin/as
--with-ld=/usr/ccs/bin/ld
Thread model: posix
gcc version 3.2.1


uname -a
SunOS hamp 5.8 Generic_108528-07 sun4u sparc SUNW,Ultra-60


If you need any clarifications please contact either of the following:
Rosa Lisin          email:rlisin@pactolus.com
Lokesh               email:lchandra@pactolus.com


Thanks in advance

Platform group
Pactolus Communication Software
69 Milk St Suite 308
Westborough MA 01581
Tel: 508 616 0900
www.pactolus.com



 <<lib_test_mod.tar.gz>>

Attachment: lib_test_mod.tar.gz
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