git: openjdk/leyden: premain: Enable 1-step workflow with Shenandoah GC

[Ioi Lam]

Changeset: 4e0412e6
Branch: premain
Author:    Aleksey Shipilev <shade at openjdk.org>
Committer: Ioi Lam <iklam at openjdk.org>
Date:      2024-10-09 14:59:22 +0000
URL:       https://git.openjdk.org/leyden/commit/4e0412e6c004931871b1f37a09cfb593f6b7f7b2

Enable 1-step workflow with Shenandoah GC

Reviewed-by: iklam

! README.md
! src/hotspot/share/cds/heapShared.hpp
! src/hotspot/share/cds/metaspaceShared.cpp
! src/hotspot/share/code/SCCache.cpp
! src/hotspot/share/gc/shenandoah/c1/shenandoahBarrierSetC1.hpp
! test/hotspot/jtreg/runtime/cds/appcds/leyden/LeydenGCFlags.java