| /* |
| * Copyright (c) 2014, 2016, 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 AllocationCodeBlobTest |
| * @summary testing of WB::allocate/freeCodeBlob() |
| * @bug 8059624 8064669 |
| * @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=compileonly,null::* |
| * -XX:-SegmentedCodeCache |
| * compiler.whitebox.AllocationCodeBlobTest |
| * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions |
| * -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::* |
| * -XX:+SegmentedCodeCache |
| * compiler.whitebox.AllocationCodeBlobTest |
| */ |
| |
| package compiler.whitebox; |
| |
| import jdk.test.lib.Asserts; |
| import jdk.test.lib.wrappers.InfiniteLoop; |
| import sun.hotspot.WhiteBox; |
| import sun.hotspot.code.BlobType; |
| |
| import java.lang.management.MemoryPoolMXBean; |
| import java.util.ArrayList; |
| import java.util.EnumSet; |
| |
| public class AllocationCodeBlobTest { |
| private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); |
| private static final long CODE_CACHE_SIZE |
| = WHITE_BOX.getUintxVMFlag("ReservedCodeCacheSize"); |
| private static final int SIZE = 1; |
| |
| public static void main(String[] args) { |
| // check that Sweeper handels dummy blobs correctly |
| Thread t = new Thread( |
| new InfiniteLoop(WHITE_BOX::forceNMethodSweep, 1L), |
| "ForcedSweeper"); |
| t.setDaemon(true); |
| System.out.println("Starting " + t.getName()); |
| t.start(); |
| |
| EnumSet<BlobType> blobTypes = BlobType.getAvailable(); |
| for (BlobType type : blobTypes) { |
| new AllocationCodeBlobTest(type).test(); |
| } |
| |
| // check that deoptimization works well w/ dummy blobs |
| t = new Thread( |
| new InfiniteLoop(WHITE_BOX::deoptimizeAll, 1L), |
| "Deoptimize Thread"); |
| t.setDaemon(true); |
| System.out.println("Starting " + t.getName()); |
| t.start(); |
| |
| for (int i = 0; i < 10_000; ++i) { |
| for (BlobType type : blobTypes) { |
| long addr = WHITE_BOX.allocateCodeBlob(SIZE, type.id); |
| } |
| } |
| |
| } |
| |
| private final BlobType type; |
| private final MemoryPoolMXBean bean; |
| private AllocationCodeBlobTest(BlobType type) { |
| this.type = type; |
| bean = type.getMemoryPool(); |
| } |
| |
| private void test() { |
| System.out.printf("type %s%n", type); |
| |
| // Measure the code cache usage after allocate/free. |
| long start = getUsage(); |
| long addr1 = WHITE_BOX.allocateCodeBlob(SIZE, type.id); |
| long firstAllocation = getUsage(); |
| WHITE_BOX.freeCodeBlob(addr1); |
| long firstFree = getUsage(); |
| long addr2 = WHITE_BOX.allocateCodeBlob(SIZE, type.id); |
| long secondAllocation = getUsage(); |
| WHITE_BOX.freeCodeBlob(addr2); |
| |
| // The following code may trigger resolving of invokedynamic |
| // instructions and therefore method handle intrinsic creation |
| // in the code cache. Make sure this is executed after measuring |
| // the code cache usage. |
| Asserts.assertNE(0, addr1, "first allocation failed"); |
| Asserts.assertNE(0, addr2, "second allocation failed"); |
| Asserts.assertLTE(start + SIZE, firstAllocation, |
| "allocation should increase memory usage: " |
| + start + " + " + SIZE + " <= " + firstAllocation); |
| Asserts.assertLTE(firstFree, firstAllocation, |
| "free shouldn't increase memory usage: " |
| + firstFree + " <= " + firstAllocation); |
| Asserts.assertEQ(firstAllocation, secondAllocation); |
| |
| System.out.println("allocating till possible..."); |
| ArrayList<Long> blobs = new ArrayList<>(); |
| int size = (int) (CODE_CACHE_SIZE >> 7); |
| while ((addr1 = WHITE_BOX.allocateCodeBlob(size, type.id)) != 0) { |
| blobs.add(addr1); |
| } |
| for (Long blob : blobs) { |
| WHITE_BOX.freeCodeBlob(blob); |
| } |
| } |
| |
| private long getUsage() { |
| return bean.getUsage().getUsed(); |
| } |
| } |