RFR: 8286637: (fc) Memory mapped regions bigger than 2GB do not work correctly on Windows [v3]

[Brian Burkhalter]

> Cast the last parameter `dwNumberOfBytesToMap` of `MapViewOfFile()` to a `SIZE_T`, not a `DWORD`, to avoid truncation.

Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:

  8286671: Replace use of RandomAccessFile with FileChannel

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8686/files
  - new: https://git.openjdk.java.net/jdk/pull/8686/files/b5c3b0d9..c689423d

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8686&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8686&range=01-02

  Stats: 4 lines in 1 file changed: 1 ins; 1 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8686.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8686/head:pull/8686

PR: https://git.openjdk.java.net/jdk/pull/8686