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 33 /* 34 * @test AllocationCodeHeapTest 35 * @bug 8059624 36 * @library /testlibrary /testlibrary/whitebox 37 * @build AllocationCodeHeapTest 38 * @run main ClassFileInstaller sun.hotspot.WhiteBox 39 * sun.hotspot.WhiteBox$WhiteBoxPermission 40 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 41 * -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::* 42 * -XX:-SegmentedCodeCache AllocationCodeHeapTest 43 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 44 * -XX:+WhiteBoxAPI -XX:CompileCommand=compileonly,null::* 45 * -XX:+SegmentedCodeCache AllocationCodeHeapTest 46 * @summary testing of WB::allocate/freeCodeHeap() 47 */ 48 public class AllocationCodeHeapTest { 49 private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); 50 private static final long CODE_CACHE_SIZE 51 = WHITE_BOX.getUintxVMFlag("ReservedCodeCacheSize"); 52 private static final int SIZE = 1; 53 54 public static void main(String[] args) { 55 // check that Sweeper handels dummy blobs correctly 56 new ForcedSweeper(500).start(); 57 EnumSet<BlobType> blobTypes = BlobType.getAvailable(); 58 for (BlobType type : blobTypes) { 59 new AllocationCodeHeapTest(type).test(); 60 } 61 } 62 63 private final BlobType type; 64 private final MemoryPoolMXBean bean; 65 private AllocationCodeHeapTest(BlobType type) { 66 this.type = type; 67 bean = type.getMemoryPool(); 68 } 69 70 private void test() { 71 System.out.printf("type %s%n", type); 72 long start = getUsage(); 73 long addr = WHITE_BOX.allocateCodeHeap(SIZE, type.id); 74 long firstAllocation = getUsage(); 75 Asserts.assertLTE(start + SIZE, firstAllocation, 76 "allocation should increase memory usage: " 77 + start + " + " + SIZE + " <= " + firstAllocation); 78 79 WHITE_BOX.freeCodeHeap(addr); 80 long firstFree = getUsage(); 81 Asserts.assertLTE(firstFree, firstAllocation, 82 "free shouldn't increase memory usage: " 83 + firstFree + " <= " + firstAllocation); 84 85 addr = WHITE_BOX.allocateCodeHeap(SIZE, type.id); 86 long secondAllocation = getUsage(); 87 Asserts.assertEQ(firstAllocation, secondAllocation); 88 89 WHITE_BOX.freeCodeHeap(addr); 90 System.out.println("allocating till possible..."); 91 ArrayList<Long> blobs = new ArrayList<>(); 92 int size = (int) (CODE_CACHE_SIZE >> 7); 93 while ((addr = WHITE_BOX.allocateCodeHeap(size, type.id)) != 0) { 94 blobs.add(addr); 95 } 96 for (Long blob : blobs) { 97 WHITE_BOX.freeCodeHeap(blob); 98 } 99 } 100 101 private long getUsage() { 102 return bean.getUsage().getUsed(); 103 } 104 105 private static class ForcedSweeper extends Thread { 106 private final int millis; 107 public ForcedSweeper(int millis) { 108 super("ForcedSweeper"); 109 setDaemon(true); 110 this.millis = millis; 111 } 112 public void run() { 113 try { 114 while (true) { 115 WHITE_BOX.forceNMethodSweep(); 116 Thread.sleep(millis); 117 } 118 } catch (InterruptedException e) { 119 Thread.currentThread().interrupt(); 120 throw new Error(e); 121 } 122 } 123 } 124 }