git: openjdk/jdk15u-dev: 8253638: Cleanup os::reserve_memory and remove MAP_FIXED

[Yuri Nesterenko]

Changeset: 9a8cd1e6
Author:    Danil Bubnov <dbubnov at azul.com>
Committer: Yuri Nesterenko <yan at openjdk.org>
Date:      2021-12-21 15:41:35 +0000
URL:       https://git.openjdk.java.net/jdk15u-dev/commit/9a8cd1e67a1289221b91726d02b52be5b45c8144

8253638: Cleanup os::reserve_memory and remove MAP_FIXED

Reviewed-by: akozlov, yan
Backport-of: 625a9352bfdc017f426c3bd2a5c24b0f7598ccce

! src/hotspot/os/aix/os_aix.cpp
! src/hotspot/os/bsd/os_bsd.cpp
! src/hotspot/os/linux/os_linux.cpp
! src/hotspot/os/posix/os_posix.cpp
! src/hotspot/os/windows/os_windows.cpp
! src/hotspot/os_cpu/bsd_x86/os_bsd_x86.cpp
! src/hotspot/os_cpu/bsd_zero/os_bsd_zero.cpp
! src/hotspot/os_cpu/linux_x86/os_linux_x86.cpp
! src/hotspot/os_cpu/linux_zero/os_linux_zero.cpp
! src/hotspot/share/gc/z/zMarkStackAllocator.cpp
! src/hotspot/share/memory/allocation.inline.hpp
! src/hotspot/share/memory/virtualspace.cpp
! src/hotspot/share/prims/whitebox.cpp
! src/hotspot/share/runtime/os.cpp
! src/hotspot/share/runtime/os.hpp
! src/hotspot/share/runtime/safepointMechanism.cpp
! test/hotspot/gtest/runtime/test_committed_virtualmemory.cpp