116 lines
3.6 KiB
Java
116 lines
3.6 KiB
Java
/*
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* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2020 SAP SE. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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import jdk.test.whitebox.WhiteBox;
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public class MetaspaceTestArena {
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long arena;
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final long allocationCeiling;
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// Number and word size of allocations
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long allocatedWords = 0;
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long numAllocated = 0;
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long deallocatedWords = 0;
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long numDeallocated = 0;
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volatile long numAllocationFailures = 0;
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private synchronized boolean reachedCeiling() {
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return (allocatedWords - deallocatedWords) > allocationCeiling;
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}
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private synchronized void accountAllocation(long words) {
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numAllocated ++;
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allocatedWords += words;
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}
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private synchronized void accountDeallocation(long words) {
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numDeallocated ++;
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deallocatedWords += words;
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}
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MetaspaceTestArena(long arena0, long allocationCeiling) {
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this.allocationCeiling = allocationCeiling;
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this.arena = arena0;
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}
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public Allocation allocate(long words) {
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if (reachedCeiling()) {
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numAllocationFailures ++;
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return null;
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}
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WhiteBox wb = WhiteBox.getWhiteBox();
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long p = wb.allocateFromMetaspaceTestArena(arena, words);
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if (p == 0) {
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numAllocationFailures ++;
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return null;
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} else {
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accountAllocation(words);
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}
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return new Allocation(p, words);
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}
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public void deallocate(Allocation a) {
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WhiteBox wb = WhiteBox.getWhiteBox();
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wb.deallocateToMetaspaceTestArena(arena, a.p, a.word_size);
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accountDeallocation(a.word_size);
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}
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//// Convenience functions ////
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public Allocation allocate_expect_success(long words) {
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Allocation a = allocate(words);
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if (a.isNull()) {
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throw new RuntimeException("Allocation failed (" + words + ")");
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}
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return a;
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}
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public void allocate_expect_failure(long words) {
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Allocation a = allocate(words);
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if (!a.isNull()) {
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throw new RuntimeException("Allocation failed (" + words + ")");
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}
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}
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boolean isLive() {
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return arena != 0;
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}
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@Override
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public String toString() {
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return "arena=" + arena +
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", ceiling=" + allocationCeiling +
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", allocatedWords=" + allocatedWords +
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", numAllocated=" + numAllocated +
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", deallocatedWords=" + deallocatedWords +
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", numDeallocated=" + numDeallocated +
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", numAllocationFailures=" + numAllocationFailures +
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'}';
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}
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}
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