Issue with C++ exception handling with 4.6.2 release on PSIM BSP

[Joel Sherrill <joel@OARcorp.com>]

Karel Gardas wrote:
> Hello,
> 
> after non-success with ARM/RTEMS, I'm trying to get C++ working for
> PowerPC/RTEMS. Unfortunatelly it seems something is broken with exception
> handling. I've slightly modified hello_world_c to:

Everything has to be "just so" for exceptions to work.  It requires
some magic in the bsp_specs and linkcmds.

psim has had a lot of work since 4.6.2 and C++ exceptions should work 
now on the 4.6 branch.  It was converted from the old to the new
exception model as part of fixing some outstanding issues like this
one.

If you REALLY want C++ exceptions with psim, then I suggestion you
get the diff post 4.6.2 on the 4.6 branch from CVS.

--joel

> 
> /*
>  *  Simple test program -- simplified version of sample test hello.
>  */
> 
> #include <bsp.h>
> 
> #include <stdlib.h>
> #include <stdio.h>
> #include <stdlib.h>
> 
> rtems_task Init(
>   rtems_task_argument ignored
> )
> {
>   printf( "\n\n*** HELLO WORLD TEST ***\n" );
>   try {
>     throw 1;
>   }
>   catch (...) {
>     printf("1 caught!\n");
>   }
>   printf( "Hello World\n" );
>   printf( "*** END OF HELLO WORLD TEST ***\n" );
>   exit( 0 );
> }
> 
> /* configuration information */
> 
> #define CONFIGURE_TEST_NEEDS_CONSOLE_DRIVER
> 
> #define CONFIGURE_RTEMS_INIT_TASKS_TABLE
> 
> #define CONFIGURE_MAXIMUM_TASKS 1
> 
> #define CONFIGURE_INIT
> 
> #include <confdefs.h>
> 
> /* end of file */
> 
> 
> also I've added make-cxx-exe rule into the PSIM's custom makefile.
> Building this example looks:
> 
> /mnt/karel/downloads/RTEMS/build/tools/examples-4.6.2/hello_world_cxx_without_libstdcxx$
> make
> test -d o-optimize || mkdir o-optimize
> powerpc-rtems-g++ -B/mnt/karel/rtems-ppc//powerpc-rtems/psim/lib/ -specs
> bsp_specs -qrtems   -g -Wall  -g     -mcpu=603e -D_OLD_EXCEPTIONS
> -Dppc603e     -c   -o o-optimize/test.o test.cc
> powerpc-rtems-g++ -B/mnt/karel/rtems-ppc//powerpc-rtems/psim/lib/ -specs
> bsp_specs -qrtems   -g -Wall  -g     -mcpu=603e -D_OLD_EXCEPTIONS
> -Dppc603e          -o o-optimize/hello.exe   o-optimize/test.o
> /mnt/karel/rtems-ppc//powerpc-rtems/psim/lib/no-dpmem.rel
> /mnt/karel/rtems-ppc//powerpc-rtems/psim/lib/no-event.rel
> /mnt/karel/rtems-ppc//powerpc-rtems/psim/lib/no-msg.rel
> /mnt/karel/rtems-ppc//powerpc-rtems/psim/lib/no-mp.rel
> /mnt/karel/rtems-ppc//powerpc-rtems/psim/lib/no-part.rel
> /mnt/karel/rtems-ppc//powerpc-rtems/psim/lib/no-signal.rel
> /mnt/karel/rtems-ppc//powerpc-rtems/psim/lib/no-timer.rel
> /mnt/karel/rtems-ppc//powerpc-rtems/psim/lib/no-rtmon.rel
> powerpc-rtems-nm -g -n o-optimize/hello.exe > o-optimize/hello.num
> powerpc-rtems-size o-optimize/hello.exe
>    text    data     bss     dec     hex filename
>  145144   22692   21421  189257   2e349 o-optimize/hello.exe
> /mnt/karel/downloads/RTEMS/build/tools/examples-4.6.2/hello_world_cxx_without_libstdcxx$
> 
> 
> and running looks:
> 
> /mnt/karel/downloads/RTEMS/build/tools/examples-4.6.2/hello_world_cxx_without_libstdcxx$
> psim o-optimize/hello.exe
> 
> 
> *** HELLO WORLD TEST ***
> /mnt/karel/downloads/RTEMS/build/tools/examples-4.6.2/hello_world_cxx_without_libstdcxx$
> 
> 
> as you can see, exception is thrown, but never caught in catch block. FYI:
> Yes, I built rtems with `--enable-cxx'.
> 
> Is there anybody here who is using C++ on RTEMS?
> 
> Thanks,
> Karel
> --
> Karel Gardas                  kgardas at objectsecurity.com
> ObjectSecurity Ltd.           http://www.objectsecurity.com
> 


-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel at OARcorp.com                 On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
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