1 /* 2 * Copyright (c) 2014, 2021, 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 * @test AllocationCodeBlobTest 26 * @summary testing of WB::allocate/freeCodeBlob() 27 * @bug 8059624 8064669 28 * @library /test/lib / 29 * @modules java.base/jdk.internal.misc 30 * java.management 31 * @build sun.hotspot.WhiteBox 32 * @run driver jdk.test.lib.helpers.ClassFileInstaller sun.hotspot.WhiteBox 33 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 34 * -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::* 35 * -XX:-SegmentedCodeCache 36 * compiler.whitebox.AllocationCodeBlobTest 37 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 38 * -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::* 39 * -XX:+SegmentedCodeCache 40 * compiler.whitebox.AllocationCodeBlobTest 41 */ 42 43 package compiler.whitebox; 44 45 import jdk.test.lib.Asserts; 46 import jdk.test.lib.InfiniteLoop; 47 import sun.hotspot.WhiteBox; 48 import sun.hotspot.code.BlobType; 49 50 import java.lang.management.MemoryPoolMXBean; 51 import java.util.ArrayList; 52 import java.util.EnumSet; 53 54 public class AllocationCodeBlobTest { 55 private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); 56 private static final long CODE_CACHE_SIZE 57 = WHITE_BOX.getUintxVMFlag("ReservedCodeCacheSize"); 58 private static final int SIZE = 1; 59 main(String[] args)60 public static void main(String[] args) { 61 // check that Sweeper handels dummy blobs correctly 62 Thread t = new Thread( 63 new InfiniteLoop(WHITE_BOX::forceNMethodSweep, 1L), 64 "ForcedSweeper"); 65 t.setDaemon(true); 66 System.out.println("Starting " + t.getName()); 67 t.start(); 68 69 EnumSet<BlobType> blobTypes = BlobType.getAvailable(); 70 for (BlobType type : blobTypes) { 71 new AllocationCodeBlobTest(type).test(); 72 } 73 74 // check that deoptimization works well w/ dummy blobs 75 t = new Thread( 76 new InfiniteLoop(WHITE_BOX::deoptimizeAll, 1L), 77 "Deoptimize Thread"); 78 t.setDaemon(true); 79 System.out.println("Starting " + t.getName()); 80 t.start(); 81 82 for (int i = 0; i < 10_000; ++i) { 83 for (BlobType type : blobTypes) { 84 long addr = WHITE_BOX.allocateCodeBlob(SIZE, type.id); 85 } 86 } 87 88 } 89 90 private final BlobType type; 91 private final MemoryPoolMXBean bean; AllocationCodeBlobTest(BlobType type)92 private AllocationCodeBlobTest(BlobType type) { 93 this.type = type; 94 bean = type.getMemoryPool(); 95 } 96 test()97 private void test() { 98 System.out.printf("type %s%n", type); 99 100 // Measure the code cache usage after allocate/free. 101 long start = getUsage(); 102 long addr1 = WHITE_BOX.allocateCodeBlob(SIZE, type.id); 103 long firstAllocation = getUsage(); 104 WHITE_BOX.freeCodeBlob(addr1); 105 long firstFree = getUsage(); 106 long addr2 = WHITE_BOX.allocateCodeBlob(SIZE, type.id); 107 long secondAllocation = getUsage(); 108 WHITE_BOX.freeCodeBlob(addr2); 109 110 // The following code may trigger resolving of invokedynamic 111 // instructions and therefore method handle intrinsic creation 112 // in the code cache. Make sure this is executed after measuring 113 // the code cache usage. 114 Asserts.assertNE(0, addr1, "first allocation failed"); 115 Asserts.assertNE(0, addr2, "second allocation failed"); 116 Asserts.assertLTE(start + SIZE, firstAllocation, 117 "allocation should increase memory usage: " 118 + start + " + " + SIZE + " <= " + firstAllocation); 119 Asserts.assertLTE(firstFree, firstAllocation, 120 "free shouldn't increase memory usage: " 121 + firstFree + " <= " + firstAllocation); 122 Asserts.assertEQ(firstAllocation, secondAllocation); 123 124 System.out.println("allocating till possible..."); 125 ArrayList<Long> blobs = new ArrayList<>(); 126 int size = (int) (CODE_CACHE_SIZE >> 7); 127 while ((addr1 = WHITE_BOX.allocateCodeBlob(size, type.id)) != 0) { 128 blobs.add(addr1); 129 } 130 for (Long blob : blobs) { 131 WHITE_BOX.freeCodeBlob(blob); 132 } 133 } 134 getUsage()135 private long getUsage() { 136 return bean.getUsage().getUsed(); 137 } 138 } 139