--- /dev/null 2017-02-06 07:32:31.446714040 +0100 +++ new/test/compiler/codecache/stress/ReturnBlobToWrongHeapTest.java 2017-02-06 15:17:32.573815898 +0100 @@ -0,0 +1,89 @@ +/* + * 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); + } + } +}