1 /* 2 * Copyright (c) 2017, 2020, Red Hat, Inc. 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 /** 26 * @test TestHeapDump 27 * @summary Tests JVMTI heap dumps 28 * @requires vm.gc.Shenandoah & !vm.graal.enabled 29 * @compile TestHeapDump.java 30 * @run main/othervm/native/timeout=300 -agentlib:TestHeapDump -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx128m -XX:ShenandoahGCHeuristics=aggressive TestHeapDump 31 * 32 */ 33 34 /** 35 * @test TestHeapDump 36 * @summary Tests JVMTI heap dumps 37 * @requires vm.gc.Shenandoah & !vm.graal.enabled & (vm.bits == "64") 38 * @compile TestHeapDump.java 39 * @run main/othervm/native/timeout=300 -agentlib:TestHeapDump -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx128m -XX:ShenandoahGCHeuristics=aggressive -XX:-UseCompressedOops TestHeapDump 40 */ 41 42 /** 43 * @test TestHeapDump 44 * @summary Tests JVMTI heap dumps 45 * @requires vm.gc.Shenandoah & !vm.graal.enabled 46 * @compile TestHeapDump.java 47 * @run main/othervm/native/timeout=300 -agentlib:TestHeapDump -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx128m -XX:ShenandoahGCHeuristics=aggressive -XX:+UseStringDeduplication TestHeapDump 48 */ 49 50 import java.lang.ref.Reference; 51 52 public class TestHeapDump { 53 54 private static final int NUM_ITER = 10000; 55 56 private static final int ARRAY_SIZE = 1000; 57 58 private static final int EXPECTED_OBJECTS = 59 ARRAY_SIZE + // array reachable from instance field 60 1 + // static field root 61 1; // local field root 62 63 static { 64 try { 65 System.loadLibrary("TestHeapDump"); 66 } catch (UnsatisfiedLinkError ule) { 67 System.err.println("Could not load TestHeapDump library"); 68 System.err.println("java.library.path: " 69 + System.getProperty("java.library.path")); 70 throw ule; 71 } 72 } 73 74 native static int heapdump(Class<?> filterClass); 75 76 public static void main(String args[]) { 77 new TestHeapDump().run(); 78 } 79 80 // This root needs to be discovered 81 static Object root = new TestObject(); 82 83 // This field needs to be discovered 84 TestObject[] array; 85 86 public void run() { 87 array = new TestObject[ARRAY_SIZE]; 88 for (int i = 0; i < ARRAY_SIZE; i++) { 89 array[i] = new TestObject(); 90 } 91 TestObject localRoot = new TestObject(); 92 for (int i = 0; i < NUM_ITER; i++) { 93 int numObjs = heapdump(TestObject.class); 94 if (numObjs != EXPECTED_OBJECTS) { 95 throw new RuntimeException("Expected " + EXPECTED_OBJECTS + " objects, but got " + numObjs); 96 } 97 } 98 Reference.reachabilityFence(array); 99 Reference.reachabilityFence(localRoot); 100 } 101 102 // We look for the instances of this class during the heap scan 103 public static class TestObject {} 104 }