| /* |
| * Copyright (c) 2017, 2020, Red Hat, Inc. All rights reserved. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| /** |
| * @test TestHeapDump |
| * @summary Tests JVMTI heap dumps |
| * @key gc |
| * @requires vm.gc.Shenandoah & !vm.graal.enabled |
| * @compile TestHeapDump.java |
| * @run main/othervm/native/timeout=300 -agentlib:TestHeapDump -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx128m -XX:ShenandoahGCHeuristics=aggressive TestHeapDump |
| * |
| */ |
| |
| /** |
| * @test TestHeapDump |
| * @summary Tests JVMTI heap dumps |
| * @key gc |
| * @requires vm.gc.Shenandoah & !vm.graal.enabled & (vm.bits == "64") |
| * @compile TestHeapDump.java |
| * @run main/othervm/native/timeout=300 -agentlib:TestHeapDump -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx128m -XX:ShenandoahGCHeuristics=aggressive -XX:-UseCompressedOops TestHeapDump |
| */ |
| |
| /** |
| * @test TestHeapDump |
| * @summary Tests JVMTI heap dumps |
| * @key gc |
| * @requires vm.gc.Shenandoah & !vm.graal.enabled |
| * @compile TestHeapDump.java |
| * @run main/othervm/native/timeout=300 -agentlib:TestHeapDump -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -Xmx128m -XX:ShenandoahGCHeuristics=aggressive -XX:+UseStringDeduplication TestHeapDump |
| */ |
| |
| import java.lang.ref.Reference; |
| |
| public class TestHeapDump { |
| |
| private static final int NUM_ITER = 10000; |
| |
| private static final int ARRAY_SIZE = 1000; |
| |
| private static final int EXPECTED_OBJECTS = |
| ARRAY_SIZE + // array reachable from instance field |
| 1 + // static field root |
| 1; // local field root |
| |
| static { |
| try { |
| System.loadLibrary("TestHeapDump"); |
| } catch (UnsatisfiedLinkError ule) { |
| System.err.println("Could not load TestHeapDump library"); |
| System.err.println("java.library.path: " |
| + System.getProperty("java.library.path")); |
| throw ule; |
| } |
| } |
| |
| native static int heapdump(Class<?> filterClass); |
| |
| public static void main(String args[]) { |
| new TestHeapDump().run(); |
| } |
| |
| // This root needs to be discovered |
| static Object root = new TestObject(); |
| |
| // This field needs to be discovered |
| TestObject[] array; |
| |
| public void run() { |
| array = new TestObject[ARRAY_SIZE]; |
| for (int i = 0; i < ARRAY_SIZE; i++) { |
| array[i] = new TestObject(); |
| } |
| TestObject localRoot = new TestObject(); |
| for (int i = 0; i < NUM_ITER; i++) { |
| int numObjs = heapdump(TestObject.class); |
| if (numObjs != EXPECTED_OBJECTS) { |
| throw new RuntimeException("Expected " + EXPECTED_OBJECTS + " objects, but got " + numObjs); |
| } |
| } |
| Reference.reachabilityFence(array); |
| Reference.reachabilityFence(localRoot); |
| } |
| |
| // We look for the instances of this class during the heap scan |
| public static class TestObject {} |
| } |