[jdk8u-dev] RFR: 8305165: [8u] ServiceThread::nmethods_do is not called to keep nmethods from being zombied while in the queue

[Joshua Zhu]

Various Crashes in JvmtiExport::post_compiled_method_load were found in
our production environment after users started to receive the JVMTI
COMPILED_METHOD_LOAD event.
ServiceThread::nmethods_do should have been called to keep nmethods from
being zombied while in the JvmtiDeferredEventQueue, but
JavaThead::nmethods_do is called at present.
Make a virtual function call to the correct method to fix this issue.
With the fix, various crashes were gone.
This issue only exists in 8u.

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Commit messages:
 - 8305165: [8u] ServiceThread::nmethods_do is not called to keep nmethods from being zombied while in the queue

Changes: https://git.openjdk.org/jdk8u-dev/pull/293/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=293&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8305165
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/293.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/293/head:pull/293

PR: https://git.openjdk.org/jdk8u-dev/pull/293