* exception.h (exception::handle_while_being_debugged): Declare.

(exception::exception): Install unhandled exception filter.
	* exceptions.cc (exception::handle_while_being_debugged): New method.

winsup/cygwin/exceptions.cc

@@ -555,6 +555,14 @@ rtl_unwind (exception_list *frame, PEXCEPTION_RECORD e)
 
 bool exception::handler_installed NO_COPY;
 
+int
+exception::handle_while_being_debugged (LPEXCEPTION_POINTERS ep)
+{
+  if (being_debugged ())
+    return handle (ep);
+  return EXCEPTION_CONTINUE_SEARCH;
+}
+
 int
 exception::handle (LPEXCEPTION_POINTERS ep)
 #else