hg: jdk/hs: 6415680: (bf) MappedByteBuffer.get() can provoke crash with EXCEPTION_IN_PAGE_ERROR

[jamsheed.c.m at oracle.com]

Changeset: 895fddb973a1
Author:    jcm
Date:      2017-11-15 00:49 -0800
URL:       http://hg.openjdk.java.net/jdk/hs/rev/895fddb973a1

6415680: (bf) MappedByteBuffer.get() can provoke crash with EXCEPTION_IN_PAGE_ERROR
Summary: Made changes in topLevelExceptionFilter for handling unsafe single value invalid memory access failures, equivalent of JDK-4454115.
Reviewed-by: dholmes, dlong

! src/hotspot/os/windows/os_windows.cpp