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/*
* 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 {}
}
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