hg: jdk/jdk: 8153413: Exceptions::_throw always logs exceptions, penalizing performance

[coleen.phillimore at oracle.com]

Changeset: b2fb6f782d84
Author:    coleenp
Date:      2019-02-21 09:21 -0500
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/b2fb6f782d84

8153413: Exceptions::_throw always logs exceptions, penalizing performance
Summary: construct exception string into Event message directly add if (log_is_enabled) for logging.
Reviewed-by: ysuenaga, dholmes

! src/hotspot/share/utilities/events.cpp
! src/hotspot/share/utilities/events.hpp
! src/hotspot/share/utilities/exceptions.cpp