84 lines
3.4 KiB
Java
84 lines
3.4 KiB
Java
/*
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* Copyright (c) 2014, 2022, Oracle and/or its affiliates. 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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* @test RandomAllocationTest
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* @key stress randomness
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* @summary stressing code cache by allocating randomly sized "dummy" code blobs
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* @library /test/lib /
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* @modules java.base/jdk.internal.misc
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* java.management
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*
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* @build jdk.test.whitebox.WhiteBox compiler.codecache.stress.Helper compiler.codecache.stress.TestCaseImpl
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
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* -XX:+WhiteBoxAPI
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* -XX:CompileCommand=dontinline,compiler.codecache.stress.Helper$TestCase::method
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* -XX:-SegmentedCodeCache
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* compiler.codecache.stress.RandomAllocationTest
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* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
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* -XX:+WhiteBoxAPI
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* -XX:CompileCommand=dontinline,compiler.codecache.stress.Helper$TestCase::method
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* -XX:+SegmentedCodeCache
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* compiler.codecache.stress.RandomAllocationTest
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*/
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package compiler.codecache.stress;
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import jdk.test.whitebox.code.BlobType;
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import java.util.ArrayList;
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import java.util.Random;
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import jdk.test.lib.Utils;
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public class RandomAllocationTest implements Runnable {
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private static final long CODE_CACHE_SIZE
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= Helper.WHITE_BOX.getUintxVMFlag("ReservedCodeCacheSize");
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private static final int MAX_BLOB_SIZE = (int) (CODE_CACHE_SIZE >> 7);
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private static final BlobType[] BLOB_TYPES
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= BlobType.getAvailable().toArray(new BlobType[0]);
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private final Random rng = Utils.getRandomInstance();
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public static void main(String[] args) {
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new CodeCacheStressRunner(new RandomAllocationTest()).runTest();
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}
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private final ArrayList<Long> blobs = new ArrayList<>();
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@Override
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public void run() {
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boolean allocate = blobs.isEmpty() || rng.nextBoolean();
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if (allocate) {
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int type = rng.nextInt(BLOB_TYPES.length);
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long addr = Helper.WHITE_BOX.allocateCodeBlob(
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rng.nextInt(MAX_BLOB_SIZE), BLOB_TYPES[type].id);
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if (addr != 0) {
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blobs.add(addr);
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}
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} else {
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int index = rng.nextInt(blobs.size());
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Helper.WHITE_BOX.freeCodeBlob(blobs.remove(index));
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}
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}
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}
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