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
