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.management 39 * @build AllocationCodeBlobTest 40 * @run main ClassFileInstaller sun.hotspot.WhiteBox 41 * sun.hotspot.WhiteBox$WhiteBoxPermission 42 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 43 * -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::* 44 * -XX:-SegmentedCodeCache AllocationCodeBlobTest 45 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 46 * -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::* 47 * -XX:+SegmentedCodeCache AllocationCodeBlobTest 48 * @summary testing of WB::allocate/freeCodeBlob() 49 */ 50 public class AllocationCodeBlobTest { 51 private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); 52 private static final long CODE_CACHE_SIZE 53 = WHITE_BOX.getUintxVMFlag("ReservedCodeCacheSize"); 54 private static final int SIZE = 1; 55 56 public static void main(String[] args) { 57 // check that Sweeper handels dummy blobs correctly 58 Thread t = new Thread( 59 new InfiniteLoop(WHITE_BOX::forceNMethodSweep, 1L), 60 "ForcedSweeper"); 61 t.setDaemon(true); 62 System.out.println("Starting " + t.getName()); 63 t.start(); 64 65 EnumSet<BlobType> blobTypes = BlobType.getAvailable(); 66 for (BlobType type : blobTypes) { 67 new AllocationCodeBlobTest(type).test(); 68 } 69 70 // check that deoptimization works well w/ dummy blobs 71 t = new Thread( 72 new InfiniteLoop(WHITE_BOX::deoptimizeAll, 1L), 73 "Deoptimize Thread"); 74 t.setDaemon(true); 75 System.out.println("Starting " + t.getName()); 76 t.start(); 77 78 for (int i = 0; i < 10_000; ++i) { 79 for (BlobType type : blobTypes) { 80 long addr = WHITE_BOX.allocateCodeBlob(SIZE, type.id); 81 } 82 } 83 84 } 85 86 private final BlobType type; 87 private final MemoryPoolMXBean bean; 88 private AllocationCodeBlobTest(BlobType type) { 89 this.type = type; 90 bean = type.getMemoryPool(); 91 } 92 93 private void test() { 94 System.out.printf("type %s%n", type); 95 long start = getUsage(); 96 long addr = WHITE_BOX.allocateCodeBlob(SIZE, type.id); 97 Asserts.assertNE(0, addr, "allocation failed"); 98 99 long firstAllocation = getUsage(); 100 Asserts.assertLTE(start + SIZE, firstAllocation, 101 "allocation should increase memory usage: " 102 + start + " + " + SIZE + " <= " + firstAllocation); 103 104 WHITE_BOX.freeCodeBlob(addr); 105 long firstFree = getUsage(); 106 Asserts.assertLTE(firstFree, firstAllocation, 107 "free shouldn't increase memory usage: " 108 + firstFree + " <= " + firstAllocation); 109 110 addr = WHITE_BOX.allocateCodeBlob(SIZE, type.id); 111 Asserts.assertNE(0, addr, "allocation failed"); 112 113 long secondAllocation = getUsage(); 114 Asserts.assertEQ(firstAllocation, secondAllocation); 115 116 WHITE_BOX.freeCodeBlob(addr); 117 System.out.println("allocating till possible..."); 118 ArrayList<Long> blobs = new ArrayList<>(); 119 int size = (int) (CODE_CACHE_SIZE >> 7); 120 while ((addr = WHITE_BOX.allocateCodeBlob(size, type.id)) != 0) { 121 blobs.add(addr); 122 } 123 for (Long blob : blobs) { 124 WHITE_BOX.freeCodeBlob(blob); 125 } 126 } 127 128 private long getUsage() { 129 return bean.getUsage().getUsed(); 130 } 131 }