git: openjdk/jdk: 8312018: Improve reservation of class space and CDS

[Thomas Stuefe]

Changeset: 89d18ea4
Author:    Thomas Stuefe <stuefe at openjdk.org>
Date:      2023-08-30 17:51:28 +0000
URL:       https://git.openjdk.org/jdk/commit/89d18ea40f3508f4053824fd47f0b0f85fe1d7c2

8312018: Improve reservation of class space and CDS
8313669: Reduced chance for zero-based nKlass encoding since JDK-8296565

Reviewed-by: iklam, adinn

! src/hotspot/os/aix/os_aix.cpp
! src/hotspot/os/bsd/os_bsd.cpp
! src/hotspot/os/linux/os_linux.cpp
! src/hotspot/os/windows/os_windows.cpp
! src/hotspot/share/cds/metaspaceShared.cpp
! src/hotspot/share/memory/metaspace.cpp
! src/hotspot/share/memory/metaspace.hpp
! src/hotspot/share/memory/virtualspace.cpp
! src/hotspot/share/memory/virtualspace.hpp
! src/hotspot/share/oops/compressedKlass.cpp
! src/hotspot/share/runtime/globals.hpp
! src/hotspot/share/runtime/os.cpp
! src/hotspot/share/runtime/os.hpp
+ src/hotspot/share/utilities/fastrand.hpp
! test/hotspot/gtest/runtime/test_os.cpp
+ test/hotspot/gtest/runtime/test_os_reserve_between.cpp
! test/hotspot/gtest/testutils.hpp