AllocationCodeBlobTest.java revision 11833:1cbffa2beba6
1/* 2 * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25/* 26 * @test AllocationCodeBlobTest 27 * @summary testing of WB::allocate/freeCodeBlob() 28 * @bug 8059624 8064669 29 * @library /test/lib / 30 * @modules java.base/jdk.internal.misc 31 * java.management 32 * @build sun.hotspot.WhiteBox 33 * @run driver ClassFileInstaller sun.hotspot.WhiteBox 34 * sun.hotspot.WhiteBox$WhiteBoxPermission 35 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 36 * -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::* 37 * -XX:-SegmentedCodeCache 38 * compiler.whitebox.AllocationCodeBlobTest 39 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 40 * -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::* 41 * -XX:+SegmentedCodeCache 42 * compiler.whitebox.AllocationCodeBlobTest 43 */ 44 45package compiler.whitebox; 46 47import jdk.test.lib.Asserts; 48import jdk.test.lib.wrappers.InfiniteLoop; 49import sun.hotspot.WhiteBox; 50import sun.hotspot.code.BlobType; 51 52import java.lang.management.MemoryPoolMXBean; 53import java.util.ArrayList; 54import java.util.EnumSet; 55 56public class AllocationCodeBlobTest { 57 private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); 58 private static final long CODE_CACHE_SIZE 59 = WHITE_BOX.getUintxVMFlag("ReservedCodeCacheSize"); 60 private static final int SIZE = 1; 61 62 public static void main(String[] args) { 63 // check that Sweeper handels dummy blobs correctly 64 Thread t = new Thread( 65 new InfiniteLoop(WHITE_BOX::forceNMethodSweep, 1L), 66 "ForcedSweeper"); 67 t.setDaemon(true); 68 System.out.println("Starting " + t.getName()); 69 t.start(); 70 71 EnumSet<BlobType> blobTypes = BlobType.getAvailable(); 72 for (BlobType type : blobTypes) { 73 new AllocationCodeBlobTest(type).test(); 74 } 75 76 // check that deoptimization works well w/ dummy blobs 77 t = new Thread( 78 new InfiniteLoop(WHITE_BOX::deoptimizeAll, 1L), 79 "Deoptimize Thread"); 80 t.setDaemon(true); 81 System.out.println("Starting " + t.getName()); 82 t.start(); 83 84 for (int i = 0; i < 10_000; ++i) { 85 for (BlobType type : blobTypes) { 86 long addr = WHITE_BOX.allocateCodeBlob(SIZE, type.id); 87 } 88 } 89 90 } 91 92 private final BlobType type; 93 private final MemoryPoolMXBean bean; 94 private AllocationCodeBlobTest(BlobType type) { 95 this.type = type; 96 bean = type.getMemoryPool(); 97 } 98 99 private void test() { 100 System.out.printf("type %s%n", type); 101 102 // Measure the code cache usage after allocate/free. 103 long start = getUsage(); 104 long addr1 = WHITE_BOX.allocateCodeBlob(SIZE, type.id); 105 long firstAllocation = getUsage(); 106 WHITE_BOX.freeCodeBlob(addr1); 107 long firstFree = getUsage(); 108 long addr2 = WHITE_BOX.allocateCodeBlob(SIZE, type.id); 109 long secondAllocation = getUsage(); 110 WHITE_BOX.freeCodeBlob(addr2); 111 112 // The following code may trigger resolving of invokedynamic 113 // instructions and therefore method handle intrinsic creation 114 // in the code cache. Make sure this is executed after measuring 115 // the code cache usage. 116 Asserts.assertNE(0, addr1, "first allocation failed"); 117 Asserts.assertNE(0, addr2, "second allocation failed"); 118 Asserts.assertLTE(start + SIZE, firstAllocation, 119 "allocation should increase memory usage: " 120 + start + " + " + SIZE + " <= " + firstAllocation); 121 Asserts.assertLTE(firstFree, firstAllocation, 122 "free shouldn't increase memory usage: " 123 + firstFree + " <= " + firstAllocation); 124 Asserts.assertEQ(firstAllocation, secondAllocation); 125 126 System.out.println("allocating till possible..."); 127 ArrayList<Long> blobs = new ArrayList<>(); 128 int size = (int) (CODE_CACHE_SIZE >> 7); 129 while ((addr1 = WHITE_BOX.allocateCodeBlob(size, type.id)) != 0) { 130 blobs.add(addr1); 131 } 132 for (Long blob : blobs) { 133 WHITE_BOX.freeCodeBlob(blob); 134 } 135 } 136 137 private long getUsage() { 138 return bean.getUsage().getUsed(); 139 } 140} 141