1 /* 2 * Copyright (c) 2014, 2015, 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 import java.lang.management.MemoryPoolMXBean; 26 import java.util.EnumSet; 27 import java.util.ArrayList; 28 29 import sun.hotspot.WhiteBox; 30 import sun.hotspot.code.BlobType; 31 import jdk.test.lib.Asserts; 32 import jdk.test.lib.InfiniteLoop; 33 34 /* 35 * @test AllocationCodeBlobTest 36 * @bug 8059624 8064669 37 * @library /testlibrary /test/lib 38 * @modules java.base/jdk.internal.misc 39 * @modules java.management 40 * @build AllocationCodeBlobTest 41 * @run main ClassFileInstaller sun.hotspot.WhiteBox 42 * sun.hotspot.WhiteBox$WhiteBoxPermission 43 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 44 * -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::* 45 * -XX:-SegmentedCodeCache AllocationCodeBlobTest 46 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 47 * -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::* 48 * -XX:+SegmentedCodeCache AllocationCodeBlobTest 49 * @summary testing of WB::allocate/freeCodeBlob() 50 */ 51 public class AllocationCodeBlobTest { 52 private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); 53 private static final long CODE_CACHE_SIZE 54 = WHITE_BOX.getUintxVMFlag("ReservedCodeCacheSize"); 55 private static final int SIZE = 1; 56 57 public static void main(String[] args) { 58 // check that Sweeper handels dummy blobs correctly 59 Thread t = new Thread( 60 new InfiniteLoop(WHITE_BOX::forceNMethodSweep, 1L), 61 "ForcedSweeper"); 62 t.setDaemon(true); 63 System.out.println("Starting " + t.getName()); 64 t.start(); 65 66 EnumSet<BlobType> blobTypes = BlobType.getAvailable(); 67 for (BlobType type : blobTypes) { 68 new AllocationCodeBlobTest(type).test(); 69 } 70 71 // check that deoptimization works well w/ dummy blobs 72 t = new Thread( 73 new InfiniteLoop(WHITE_BOX::deoptimizeAll, 1L), 74 "Deoptimize Thread"); 75 t.setDaemon(true); 76 System.out.println("Starting " + t.getName()); 77 t.start(); 78 79 for (int i = 0; i < 10_000; ++i) { 80 for (BlobType type : blobTypes) { 81 long addr = WHITE_BOX.allocateCodeBlob(SIZE, type.id); 82 } 83 } 84 85 } 86 87 private final BlobType type; 88 private final MemoryPoolMXBean bean; 89 private AllocationCodeBlobTest(BlobType type) { 90 this.type = type; 91 bean = type.getMemoryPool(); 92 } 93 94 private void test() { 95 System.out.printf("type %s%n", type); 96 97 // Measure the code cache usage after allocate/free. 98 long start = getUsage(); 99 long addr1 = WHITE_BOX.allocateCodeBlob(SIZE, type.id); 100 long firstAllocation = getUsage(); 101 WHITE_BOX.freeCodeBlob(addr1); 102 long firstFree = getUsage(); 103 long addr2 = WHITE_BOX.allocateCodeBlob(SIZE, type.id); 104 long secondAllocation = getUsage(); 105 WHITE_BOX.freeCodeBlob(addr2); 106 107 // The following code may trigger resolving of invokedynamic 108 // instructions and therefore method handle intrinsic creation 109 // in the code cache. Make sure this is executed after measuring 110 // the code cache usage. 111 Asserts.assertNE(0, addr1, "first allocation failed"); 112 Asserts.assertNE(0, addr2, "second allocation failed"); 113 Asserts.assertLTE(start + SIZE, firstAllocation, 114 "allocation should increase memory usage: " 115 + start + " + " + SIZE + " <= " + firstAllocation); 116 Asserts.assertLTE(firstFree, firstAllocation, 117 "free shouldn't increase memory usage: " 118 + firstFree + " <= " + firstAllocation); 119 Asserts.assertEQ(firstAllocation, secondAllocation); 120 121 System.out.println("allocating till possible..."); 122 ArrayList<Long> blobs = new ArrayList<>(); 123 int size = (int) (CODE_CACHE_SIZE >> 7); 124 while ((addr1 = WHITE_BOX.allocateCodeBlob(size, type.id)) != 0) { 125 blobs.add(addr1); 126 } 127 for (Long blob : blobs) { 128 WHITE_BOX.freeCodeBlob(blob); 129 } 130 } 131 132 private long getUsage() { 133 return bean.getUsage().getUsed(); 134 } 135 }