[8u40] RFR: 8058744, 8059002: Crash in C1 OSRed method w/ Unsafe usage

[Igor Veresov]

I’d like to backport these two fixes please. Nightlies are alright.

8058744: Crash in C1 OSRed method w/ Unsafe usage
JDK9 changeset: http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/bf402e85d046
JBS: https://bugs.openjdk.java.net/browse/JDK-8058744
JDK9 webrev: http://cr.openjdk.java.net/~iveresov/8058744/webrev.02

8059002: 8058744 needs a test case
JDK9 changeset: http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/6aada1367ea2
JBS: https://bugs.openjdk.java.net/browse/JDK-8059002
JDK9 webrev: http://cr.openjdk.java.net/~iveresov/8059002/webrev.00/

Thanks,
igor