8274560: JFR: Add test for OldObjectSample event when using Shenandoah

Backport-of: ef0922e88528bdf4fe75537ddf4e82123e3f58b3

test/jdk/jdk/jfr/event/oldobject/TestObjectDescription.java

@@ -41,7 +41,7 @@
  * @test
  * @key jfr
  * @requires vm.hasJFR
- * @requires vm.gc != "Z"
+ * @requires vm.gc != "Z" & vm.gc != "Shenandoah"
  * @library /test/lib /test/jdk
  * @modules jdk.jfr/jdk.jfr.internal.test
  * @run main/othervm -XX:TLABSize=2k jdk.jfr.event.oldobject.TestObjectDescription

test/jdk/jdk/jfr/event/oldobject/TestShenandoah.java

@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * 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.
+ */
+
+package jdk.jfr.event.oldobject;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import jdk.jfr.Recording;
+import jdk.jfr.consumer.RecordedEvent;
+import jdk.jfr.internal.test.WhiteBox;
+import jdk.test.lib.jfr.EventNames;
+import jdk.test.lib.jfr.Events;
+
+/**
+ * @test
+ * @key jfr
+ * @requires vm.hasJFR & vm.gc.Shenandoah
+ * @summary Test leak profiler with Shenandoah
+ * @library /test/lib /test/jdk
+ * @modules jdk.jfr/jdk.jfr.internal.test
+ * @run main/othervm  -XX:TLABSize=2k -XX:+UseShenandoahGC jdk.jfr.event.oldobject.TestShenandoah
+ */
+public class TestShenandoah {
+
+    static private class FindMe {
+    }
+
+    public static List<FindMe[]> list = new ArrayList<>(OldObjects.MIN_SIZE);
+
+    public static void main(String[] args) throws Exception {
+        WhiteBox.setWriteAllObjectSamples(true);
+
+        while (true) {
+            try (Recording r = new Recording()) {
+                r.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "infinity");
+                r.start();
+                allocateFindMe();
+                System.gc();
+                r.stop();
+                List<RecordedEvent> events = Events.fromRecording(r);
+                System.out.println(events);
+                if (OldObjects.countMatchingEvents(events, FindMe[].class, null, null, -1, "allocateFindMe") > 0) {
+                    return;
+                }
+                System.out.println("Could not find leaking object, retrying...");
+            }
+            list.clear();
+        }
+    }
+
+    public static void allocateFindMe() {
+        for (int i = 0; i < OldObjects.MIN_SIZE; i++) {
+            // Allocate array to trigger sampling code path for interpreter / c1
+            list.add(new FindMe[0]);
+        }
+    }
+
+}