RFR: 8258814: Compilation logging crashes for thread suspension / debugging tests

[Yi-Fan Tsai]

8258814: Compilation logging crashes for thread suspension / debugging tests

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Commit messages:
 - Merge branch 'openjdk:master' into logcrash
 - 8258814: Compilation logging crashes for thread suspension / debugging tests

Changes: https://git.openjdk.java.net/jdk/pull/7137/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7137&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8258814
  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7137.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7137/head:pull/7137

PR: https://git.openjdk.java.net/jdk/pull/7137