Exception not caught with gcc-8.2.0

[Prasath P]

Hi All,



Greetings!!!



Our application is a C++ application and compiled it with gcc-8.2.0
compiler on AIX6.1.



In our application, we are using omniORB-4.2.0 library. Earlier we used
gcc-4.2.3 to compile omniORB and our application.

omniORB + application works fine with gcc-4.2.3. But we upgraded the
compiler from gcc-4.2.3 to gcc-8.2.0. On both compiler, we compiled omniORB
+ application with C++11.

But when we run the omniORB + application which is compiled with gcc-8.2.0,
application gets crashed because it unable to catch the Exception and lead
into termination.

*Log snippet:*

omniORB: (3) 2019-11-04 03:14:00.589286: throw giopStream::CommFailure from
giopStream.cc:808(0,NO,COMM_FAILURE_UnMarshalArguments)

terminate called after throwing an instance of
'omni::giopStream::CommFailure'

IOT/Abort trap (core dumped)

*Crash Stack:*

---------- tid# 53018837 (pthread ID:   3599) ----------

0x090000000056f910  _p_nsleep(??, ??) + 0x10

0x0900000000038e64  nsleep(??, ??) + 0xe4

0x090000000015dc08  sleep(??) + 0x88

0x0000000100612310
_ZN12_GLOBAL__N_115Unix_SigHandler13processSignalEPNS_15Unix_SigDetailsEN4csys9SigActionE.isra.0(??,
??, ??) + 0x348

0x0000000100612c50  handleSignalFatal(??, ??, ??) + 0x28

<signal>

0x090000000056ff14  pthread_kill(??, ??) + 0xd4

0x090000000056f764  _p_raise(??) + 0x44

0x09000000000393e8  raise(??) + 0x48

0x0900000000055de4  abort() + 0xc4

0x0000000100171fa4  _ZN12_GLOBAL__N_115catch_terminateEv() + 0xbc

0x00000001000189a4  _ZN10__cxxabiv111__terminateEPFvvE(??) + 0x24

0x00000001000090e0  _ZSt9terminatev() + 0x14

0x00000001000185e4  __cxa_throw(??, ??, ??) + 0x6c

0x0000000101db4e20
_ZN4omni10giopStream11CommFailure6_raiseEjN5CORBA16CompletionStatusEbPKcjS5_PNS_10giopStrandE(??,
??, ??, ??, ??, ??, ??) + 0x1dc

0x00000001025ddf30
_ZN4omni10giopImpl1230unmarshalWildCardRequestHeaderEPNS_10giopStreamE(??)
+ 0x108

0x00000001025de2c4
_ZN4omni10giopImpl1217inputMessageBeginEPNS_10giopStreamEPFvS2_E(??, ??) +
0x1d4

0x0000000101db1b40  _ZN4omni6GIOP_S10dispatcherEv(??) + 0x88

0x0000000101daef3c  _ZN4omni10giopWorker7executeEv(??) + 0x60

0x0000000101d9c36c  _ZN15omniAsyncWorker8real_runEv(??) + 0xfc

0x0000000101d9dfc0
_ZN19omniAsyncPoolServer9workerRunEP15omniAsyncWorker(??, ??) + 0x74

0x0000000101d9be10  _ZN15omniAsyncWorker7mid_runEv(??) + 0x74

0x0000000101d9d9c8  _ZN15omniAsyncWorker3runEPv(??, ??) + 0x134

0x0000000101cf972c  omni_thread_wrapper(??) + 0x170

0x0900000000557e10  _pthread_body(??) + 0xf0



Actually this exception should get caught and ignored quietly in the catch
block below,

omniORB-4.2.0/src/lib/omniORB/orbcore/GIOP_S.cc

CORBA::Boolean

GIOP_S::dispatcher() {

……

  catch(const giopStream::CommFailure&) {

    return 0;

  }

}

This exception gets caught properly with the above catch when we compile
and run using gcc-4.8.3.

Catch block does not get effect when we run the application which is
compiled with gcc-8.2.0.

To understand that weather is this because of type issue, we tried with
handling all types of exceptions “catch(…)”. but that is also not working.



To isolate the issue, we compiled the example code (call_back) of omniORB
library with gcc-8.2.0 and tested it. Observed the same termination on
throwing exception.

To make sure the example code is works fine with gcc-4.8.3, we compiled the
example with gcc-4.8.3 and observed that is working properly without
termination.



Also we looked into gcc page and tried the below options.

https://gcc.gnu.org/install/configure.html

aix - AIX thread support.

Posix - Generic POSIX/Unix98 thread support.



Recompiled gcc-8.2.0 with option “--enable-threads=lib” (lib as “aix” and
“posix”) and again built omniORB example with this rebuilt gcc-8.2.0.

But observed the same issue. We got the issue with omniORB + gcc-8.2.0
built with option “--enable-threads=aix” and then rebuilt with option
“--enable-threads=posix”.



Also we compiled omniORB with gcc-8.2.0 with C++17 and observed the same
termination.



OmniORB-4.2.0 (omniORB-4.2.0.tar.bz2
<https://sourceforge.net/projects/omniorb/files/omniORB/omniORB-4.2.0/omniORB-4.2.0.tar.bz2/download>)
library is an open source library. We can download it from here,

https://sourceforge.net/projects/omniorb/files/omniORB/omniORB-4.2.0/

Example code is in the path omniORB-4.2.0/src/examples/call_back


Could you please guide us to fix this issue? Please download the omniORB
and build the source and examples to reproduce the issue.



Thanks & Regards,

P. Prasath.