| /* |
| * Copyright (c) 2014, 2015, 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. |
| * |
| */ |
| |
| import java.util.ArrayList; |
| |
| import sun.hotspot.code.BlobType; |
| |
| /* |
| * @test RandomAllocationTest |
| * @library /testlibrary /test/lib |
| * @modules java.base/jdk.internal.misc |
| * java.management |
| * @build RandomAllocationTest |
| * @run main ClassFileInstaller sun.hotspot.WhiteBox |
| * sun.hotspot.WhiteBox$WhiteBoxPermission |
| * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions |
| * -XX:CompileCommand=dontinline,Helper$TestCase::method |
| * -XX:+WhiteBoxAPI -XX:-SegmentedCodeCache RandomAllocationTest |
| * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions |
| * -XX:CompileCommand=dontinline,Helper$TestCase::method |
| * -XX:+WhiteBoxAPI -XX:+SegmentedCodeCache RandomAllocationTest |
| * @summary stressing code cache by allocating randomly sized "dummy" code blobs |
| */ |
| public class RandomAllocationTest implements Runnable { |
| private static final long CODE_CACHE_SIZE |
| = Helper.WHITE_BOX.getUintxVMFlag("ReservedCodeCacheSize"); |
| private static final int MAX_BLOB_SIZE = (int) (CODE_CACHE_SIZE >> 7); |
| private static final BlobType[] BLOB_TYPES |
| = BlobType.getAvailable().toArray(new BlobType[0]); |
| |
| public static void main(String[] args) { |
| new CodeCacheStressRunner(new RandomAllocationTest()).runTest(); |
| } |
| |
| private final ArrayList<Long> blobs = new ArrayList<>(); |
| @Override |
| public void run() { |
| boolean allocate = blobs.isEmpty() || Helper.RNG.nextBoolean(); |
| if (allocate) { |
| int type = Helper.RNG.nextInt(BLOB_TYPES.length); |
| long addr = Helper.WHITE_BOX.allocateCodeBlob( |
| Helper.RNG.nextInt(MAX_BLOB_SIZE), BLOB_TYPES[type].id); |
| if (addr != 0) { |
| blobs.add(addr); |
| } |
| } else { |
| int index = Helper.RNG.nextInt(blobs.size()); |
| Helper.WHITE_BOX.freeCodeBlob(blobs.remove(index)); |
| } |
| } |
| |
| } |