| /* |
| * Copyright (c) 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. |
| */ |
| |
| /* |
| * @test ReturnBlobToWrongHeapTest |
| * @key stress |
| * @summary Test if VM attempts to return code blobs to an incorrect code heap or to outside of the code cache. |
| * @library /test/lib / |
| * @modules java.base/jdk.internal.misc |
| * java.management |
| * |
| * @build sun.hotspot.WhiteBox |
| * @run driver ClassFileInstaller sun.hotspot.WhiteBox |
| * sun.hotspot.WhiteBox$WhiteBoxPermission |
| * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions |
| * -XX:+WhiteBoxAPI |
| * -XX:CompileCommand=dontinline,compiler.codecache.stress.Helper$TestCase::method |
| * -XX:+SegmentedCodeCache |
| * -XX:ReservedCodeCacheSize=16M |
| * -XX:CodeCacheMinBlockLength=1 |
| * compiler.codecache.stress.ReturnBlobToWrongHeapTest |
| */ |
| |
| package compiler.codecache.stress; |
| |
| import sun.hotspot.code.BlobType; |
| |
| import java.util.ArrayList; |
| |
| public class ReturnBlobToWrongHeapTest { |
| private static final long largeBlobSize = Helper.WHITE_BOX.getUintxVMFlag("ReservedCodeCacheSize") >> 6; |
| private static final long codeCacheMinBlockLength = Helper.WHITE_BOX.getUintxVMFlag("CodeCacheMinBlockLength"); |
| private static final BlobType[] BLOB_TYPES = BlobType.getAvailable().toArray(new BlobType[0]); |
| |
| // Allocate blob in first code heap (the code heap with index 0). |
| private static long allocate(int size) { |
| return Helper.WHITE_BOX.allocateCodeBlob(size, BLOB_TYPES[0].id); |
| } |
| |
| // Free blob. |
| private static void free(long address) { |
| Helper.WHITE_BOX.freeCodeBlob(address); |
| } |
| |
| public static void main(String[] args) { |
| if (codeCacheMinBlockLength == 1) { |
| // Fill first code heap with large blobs until allocation fails. |
| long address; |
| while ((address = allocate((int)largeBlobSize)) != 0) { |
| } |
| |
| // Allocate segment-sized blocks in first code heap. |
| long lastSegmentSizedAddress = 0; // Address of the last segment-sized blob allocated |
| while ((address = allocate(0)) != 0) { |
| lastSegmentSizedAddress = address; |
| } |
| |
| if (lastSegmentSizedAddress == 0) { |
| throw new RuntimeException("Test failed: Not possible to allocate segment-sized blob"); |
| } |
| |
| // Remove last segment-sized block from the first code heap. |
| free(lastSegmentSizedAddress); |
| } else { |
| throw new RuntimeException("Test requires CodeCacheMinBlockLength==1; CodeCacheMinBlockLength is " + |
| codeCacheMinBlockLength); |
| } |
| } |
| } |