hg: jdk/sandbox: 8202261: (fc) FileChannel.map and RandomAccessFile.setLength should not preallocate space

[chris.hegarty at oracle.com]

Changeset: 117501815bed
Author:    alanb
Date:      2018-04-26 09:04 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/117501815bed

8202261: (fc) FileChannel.map and RandomAccessFile.setLength should not preallocate space
Reviewed-by: bpb

! src/java.base/share/classes/sun/nio/ch/FileChannelImpl.java
! src/java.base/share/classes/sun/nio/ch/FileDispatcher.java
! src/java.base/unix/classes/sun/nio/ch/FileDispatcherImpl.java
! src/java.base/unix/native/libjava/io_util_md.c
! src/java.base/unix/native/libnio/ch/FileChannelImpl.c
! src/java.base/unix/native/libnio/ch/FileDispatcherImpl.c
! src/java.base/windows/classes/sun/nio/ch/FileDispatcherImpl.java
! src/java.base/windows/native/libnio/ch/FileChannelImpl.c
! src/java.base/windows/native/libnio/ch/FileDispatcherImpl.c