Use the following to generate some exceptions for execute immediate
SQL> BEGIN
EXECUTE IMMEDIATE 'garbage';
EXCEPTION
WHEN OTHERS THEN
DBMS_OUTPUT.PUT_LINE( DBMS_UTILITY.FORMAT_ERROR_STACK );
RAISE;
END;
where the dbms_output statement can be used instead of some logging procedure.
The output would be something like ...
BEGIN
*
ERROR at line 1:
ORA-00900: invalid SQL statement
ORA-06512: at line 6