RFR: 8267952: async logging supports to dynamically change tags and decorators [v5]

[Xin Liu]

> Support dynamic reconfiguration for async logging. 2 unittests are provided.
> The regression test discovers a race condition in LogTagSet::log() even with
> synchronous logging. It's not MT-safe if context switch happens between the
> creation of LogDecorations  and LogOutputList::Iterator. fixed.

Xin Liu has updated the pull request incrementally with one additional commit since the last revision:

  Fix VC++ warning C4099

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4408/files
  - new: https://git.openjdk.java.net/jdk/pull/4408/files/f279f263..157a0658

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4408&range=04
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4408&range=03-04

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4408.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4408/head:pull/4408

PR: https://git.openjdk.java.net/jdk/pull/4408