hg: shenandoah/jdk11: 3 new changesets

[shade at redhat.com]

Changeset: 2563158f6105
Author:    shade
Date:      2019-09-19 20:26 +0200
URL:       https://hg.openjdk.java.net/shenandoah/jdk11/rev/2563158f6105

[backport] 8231197: Shenandoah: JVMTI heap walking cleanup crashes with NULL forwardee
Reviewed-by: zgu, rkennke

! src/hotspot/share/gc/shenandoah/shenandoahCodeRoots.cpp
! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp

Changeset: 11fc0d1a04b6
Author:    shade
Date:      2019-09-19 20:26 +0200
URL:       https://hg.openjdk.java.net/shenandoah/jdk11/rev/11fc0d1a04b6

[backport] 8231198: Shenandoah: heap walking should visit all roots most of the time
Reviewed-by: zgu, rkennke

! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp

Changeset: 44db3832cddc
Author:    shade
Date:      2019-09-19 20:26 +0200
URL:       https://hg.openjdk.java.net/shenandoah/jdk11/rev/44db3832cddc

[backport] 8231244: Shenandoah: all-roots heap walking misses some weak roots
Reviewed-by: zgu, rkennke

! src/hotspot/share/gc/shenandoah/shenandoahRootProcessor.cpp
! src/hotspot/share/gc/shenandoah/shenandoahRootProcessor.hpp