RFR: JDK-8292351: tty should always live

[Thomas Stuefe]

The default stream object tty is used in many places but its lifetime is limited. It gets born not-quite at the beginning of VM initialization and dies in DestroyVM. This leaves time windows before VM initialization and after VM cleanup where logging to tty crashes.

This has been bugging me in the past, especially when wanting to use tty in code that runs very early (NMT preinit system, for example), and also causes problems for code that runs post-cleanup. Mostly this affects logging and error logging.

tty should always be safe to write to, and that is trivial to do.

-------------

Commit messages:
 - JDK-8292351-tty-should-always-live

Changes: https://git.openjdk.org/jdk/pull/9874/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9874&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8292351
  Stats: 8 lines in 1 file changed: 6 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/9874.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9874/head:pull/9874

PR: https://git.openjdk.org/jdk/pull/9874