8253361: Shenandoah: runtime barrier does not honor ShenandoahSelfFixing flag

[zhengyu123]

ShenandoahSelfFixing flag is currently only honored by C2, not runtime barrier. Runtime barrier should check the check too.

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Progress

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Issue

• JDK-8253361: Shenandoah: runtime barrier does not honor ShenandoahSelfFixing flag

Download

$ git fetch https://git.openjdk.java.net/jdk pull/254/head:pull/254
$ git checkout pull/254

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[openjdk]

@zhengyu123 The following labels will be automatically applied to this pull request: hotspot shenandoah.

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[mlbridge]

Webrevs

• 01: Full - Incremental (953e917)
• 00: Full (739124f)

[rkennke]

There seems to be a lot of unrelated changes in that patch, all that thread/NMT stuff...

[openjdk]

⚠️ @zhengyu123 This pull request contains merges that bring in commits not present in the target repository. Since this is not a "merge style" pull request, these changes will be squashed when this pull request in integrated. If this is your intention, then please ignore this message. If you want to preserve the commit structure, you must change the title of this pull request to Merge <project>:<branch> where <project> is the name of another project in the OpenJDK organization (for example Merge jdk:master).

[zhengyu123]

Messed up with branching, will re-do.