[8u] 8056154, 8057750: JVM crash with EXCEPTION_ACCESS_VIOLATION when there are many threads running

[Igor Veresov]

Backport request of the following two issues (jdk9 nightlies are ok):

8056154: JVM crash with EXCEPTION_ACCESS_VIOLATION when there are many threads running
JDK9 changeset:  http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/9ac4db006cd5
JBS: https://bugs.openjdk.java.net/browse/JDK-8056154
Webrev: http://cr.openjdk.java.net/~iveresov/8056154/webrev.01

8057750: CTW should not make MH intrinsics not entrant
JDK9 changeset: http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/712420bcab47
JBS: https://bugs.openjdk.java.net/browse/JDK-8057750
Webrev: http://cr.openjdk.java.net/~iveresov/8057750/webrev.00/


Thanks!
igor