hg: jdk9/hs-rt/hotspot: 8149023: Event based tracing should cover safepoint begin and end

[erik.gahlin at oracle.com]

Changeset: 155f22b63931
Author:    dsimms
Date:      2016-03-23 10:52 +0100
URL:       http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/155f22b63931

8149023: Event based tracing should cover safepoint begin and end
Summary: Add events to safepoint begin and end
Reviewed-by: dholmes, mgronlun, egahlin

! src/share/vm/runtime/safepoint.cpp
! src/share/vm/runtime/safepoint.hpp
! src/share/vm/runtime/vmThread.cpp
! src/share/vm/trace/traceevents.xml
! src/share/vm/trace/tracerelationdecls.xml