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msvcrt: Fix handling of nested exceptions. 

Move handling of nested exceptions completely in the
catch_function_nested_handler().  If a new exception was thrown inside
a catch block destroy the old exception object, if it is a rethrow
re-propagate the previous object.
This commit is contained in:
Peter Beutner 2006-02-22 12:04:13 +01:00 committed by Alexandre Julliard
parent 1be2e1edef
commit 62dc7f52f4
1 changed files with 27 additions and 10 deletions
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37
dlls/msvcrt/cppexcept.c
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@ -242,13 +242,34 @@ static DWORD catch_function_nested_handler( EXCEPTION_RECORD *rec, EXCEPTION_REG
msvcrt_get_thread_data()->exc_record = nested_frame->prev_rec;
return ExceptionContinueSearch;
}
else
TRACE( "got nested exception in catch function\n" );
if(rec->ExceptionCode == CXX_EXCEPTION)
{
TRACE( "got nested exception in catch function\n" );
return cxx_frame_handler( rec, nested_frame->cxx_frame, context,
NULL, nested_frame->descr, &nested_frame->frame,
nested_frame->trylevel );
PEXCEPTION_RECORD prev_rec = msvcrt_get_thread_data()->exc_record;
if(rec->ExceptionInformation[1] == 0 && rec->ExceptionInformation[2] == 0)
{
/* exception was rethrown */
rec->ExceptionInformation[1] = prev_rec->ExceptionInformation[1];
rec->ExceptionInformation[2] = prev_rec->ExceptionInformation[2];
TRACE("detect rethrow: re-propagate: obj: %lx, type: %lx\n",
rec->ExceptionInformation[1], rec->ExceptionInformation[2]);
}
else {
/* new exception in exception handler, destroy old */
void *object = (void*)prev_rec->ExceptionInformation[1];
cxx_exception_type *info = (cxx_exception_type*) prev_rec->ExceptionInformation[2];
TRACE("detect threw new exception in catch block - destroy old(obj: %p type: %p)\n",
object, info);
if(info && info->destructor)
call_dtor( info->destructor, object );
}
}
return cxx_frame_handler( rec, nested_frame->cxx_frame, context,
NULL, nested_frame->descr, &nested_frame->frame,
nested_frame->trylevel );
}
/* find and call the appropriate catch block for an exception */
@ -359,11 +380,7 @@ DWORD cxx_frame_handler( PEXCEPTION_RECORD rec, cxx_exception_frame* frame,
return exc_type->custom_handler( rec, frame, context, dispatch,
descr, nested_trylevel, nested_frame, 0 );
}
if (!exc_type) /* nested exception, fetch info from original exception */
{
rec = msvcrt_get_thread_data()->exc_record;
exc_type = (cxx_exception_type *)rec->ExceptionInformation[2];
}
if (TRACE_ON(seh))
{
TRACE("handling C++ exception rec %p frame %p trylevel %d descr %p nested_frame %p\n",