test/jdk/jdk/jfr/event/oldobject/TestHeapDeep.java
changeset 50113 caf115bb98ad
child 51214 67736b4846a0
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/jdk/jfr/event/oldobject/TestHeapDeep.java	Tue May 15 20:24:34 2018 +0200
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2015, 2018, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.gc == "null"
+ * @library /test/lib /test/jdk
+ * @modules jdk.jfr/jdk.jfr.internal.test
+ * @run main/othervm -XX:TLABSize=2k jdk.jfr.event.oldobject.TestHeapDeep
+ */
+public class TestHeapDeep {
+
+    final static class ChainNode {
+        final ChainNode next;
+        List<byte[]> leaks;
+
+        public ChainNode(ChainNode node) {
+            next = node;
+        }
+    }
+
+    public static ChainNode leak;
+
+    public static void main(String[] args) throws Exception {
+        WhiteBox.setWriteAllObjectSamples(true);
+
+        try (Recording r = new Recording()) {
+            r.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "infinity");
+            r.start();
+            leak = createChain();
+            List<RecordedEvent> events = Events.fromRecording(r);
+            if (OldObjects.countMatchingEvents(events, byte[].class, null, null, -1, "createChain") == 0) {
+                throw new Exception("Could not find ChainNode");
+            }
+            for (RecordedEvent e : events) {
+                OldObjects.validateReferenceChainLimit(e, OldObjects.MAX_CHAIN_LENGTH);
+            }
+        }
+    }
+
+    private static ChainNode createChain() {
+        ChainNode node = new ChainNode(null);
+        node.leaks = new ArrayList<>();
+        for (int i = 0; i < 100; i++) {
+            // Allocate arrays to trigger sampling code path for interpreter / c1
+            node.leaks.add(new byte[10_000]);
+        }
+        for (int i = 0; i < OldObjects.MIN_SIZE; i++) {
+            node = new ChainNode(node);
+        }
+        return node;
+    }
+}