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