[Bug c++/19620] New: exception not caught when passing through C code

[jkanze at cheuvreux dot com]

When an exception is thrown, terminate is called, even though
there is an appropriate handler, if there is any C code between
the exception and the handler.  This is a serious problem because
a lot of third party software uses a C ABI and callbacks.
(Note that this works with Sun CC.)

---------- main.cc ------------

#include <ostream>
#include <iostream>
#include <stdexcept>

extern "C"
{
    extern void enrollCallback( void (*pf)() ) ;
    extern void doCallback() ;
}

void
f()
{
    throw std::runtime_error( "Just a test" ) ;
}


extern "C" void callback()
{
    f() ;
}

int
main()
{
    enrollCallback( &callback ) ;
    try {
        doCallback() ;
    } catch ( std::exception const& error ) {
        std::cout << "Exception caught: " << error.what() << std::endl ;
    } catch ( ... ) {
        std::cout << "Unknown exception caught" << std::endl ;
    }
    return 0 ;
}
------------ test.c -----------

static void (*pf)() ;

void
enrollCallback( void (*cb)() )
{
    pf = cb ;
}

void
doCallback()
{
    (*pf)() ;
}
-------------- end sources -----------
Desired behavior: Program outputs:
>   Exception caught: Just a test
when run.  (This is the behavior of Sun CC.)

Actual behavior: terminate is called.

-- 
           Summary: exception not caught when passing through C code
           Product: gcc
           Version: 3.4.3
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jkanze at cheuvreux dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: sparc-sun-solaris2.8
  GCC host triplet: sparc-sun-solaris2.8
GCC target triplet: sparc-sun-solaris2.8


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19620