Heads-up: failures with -XX:+StressLCM -XX:+StressGCM

[Roland Westrelin]

> These failures probably indicate the missing barriers somewhere in C2,
> as they usually do. Looking at hs_err-s from crashes, it seems we mostly
> fail in some shared Java code, like TreeMap.put, so there is an easy
> reproducer:
>  http://cr.openjdk.java.net/~shade/shenandoah/TestFuzz.java
>
> $ java -XX:+UseShenandoahGC -XX:+UnlockDiagnosticVMOptions
> -XX:+StressLCM -XX:+StressGCM  TestFuzz
> <crash within seconds>
>
> Roland?

I'm looking into it.

Roland.