hg: jdk8u/jdk8u-dev/hotspot: 8191393: Random crashes during cfree+0x1c

[paul.hohensee at gmail.com]

Changeset: 4698900b8221
Author:    phh
Date:      2020-04-09 13:07 +0000
URL:       https://hg.openjdk.java.net/jdk8u/jdk8u-dev/hotspot/rev/4698900b8221

8191393: Random crashes during cfree+0x1c
Summary: Synchronize gcLogFileStream::write/rotate_log
Reviewed-by: adinn, phh, snazarki
Contributed-by: xxinliu at amazon.com

! src/share/vm/runtime/vmThread.cpp
! src/share/vm/runtime/vmThread.hpp
! src/share/vm/utilities/ostream.cpp
! src/share/vm/utilities/ostream.hpp