view src/hotspot/share/gc/z/zAddress.cpp @ 48255:59c07aef65ac

ZGC: Clean up some platform dependent code in shared directories Reviewed-by: pliden, eosterlund
author stefank
date Tue, 02 Jan 2018 15:41:23 +0100
parents
children e1e3ce67c848
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/*
 * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

#include "precompiled.hpp"
#include "gc/z/zAddress.inline.hpp"
#include "gc/z/zGlobals.hpp"
#include "runtime/thread.hpp"

void ZAddressMasks::set_good_mask(uintptr_t mask) {
  uintptr_t old_bad_mask = ZAddressBadMask;
  ZAddressGoodMask = mask;
  ZAddressBadMask = ZAddressGoodMask ^ ZAddressMetadataMask;
  ZAddressWeakBadMask = (ZAddressGoodMask | ZAddressMetadataRemapped | ZAddressMetadataFinalizable) ^ ZAddressMetadataMask;

  platform_set_bad_mask(old_bad_mask, ZAddressBadMask);
}

void ZAddressMasks::initialize() {
  ZAddressMetadataMarked = ZAddressMetadataMarked0;
  set_good_mask(ZAddressMetadataRemapped);
}

void ZAddressMasks::flip_to_marked() {
  ZAddressMetadataMarked ^= (ZAddressMetadataMarked0 | ZAddressMetadataMarked1);
  set_good_mask(ZAddressMetadataMarked);
}

void ZAddressMasks::flip_to_remapped() {
  set_good_mask(ZAddressMetadataRemapped);
}