hotspot/test/runtime/MemberName/MemberNameLeak.java
changeset 46505 fd4bc78630b1
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/MemberName/MemberNameLeak.java	Sat May 27 09:21:01 2017 -0400
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2017, 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.
+ */
+
+/*
+ * @test
+ * @bug 8174749
+ * @summary MemberNameTable should reuse entries
+ * @library /test/lib
+ * @run main MemberNameLeak
+ */
+
+import java.lang.invoke.*;
+import jdk.test.lib.process.OutputAnalyzer;
+import jdk.test.lib.process.ProcessTools;
+
+public class MemberNameLeak {
+    static class Leak {
+      public void callMe() {
+      }
+
+      public static void main(String[] args) throws Throwable {
+        Leak leak = new Leak();
+
+        for (int i = 0; i < 10; i++) {
+          MethodHandles.Lookup lookup = MethodHandles.lookup();
+          MethodType mt = MethodType.fromMethodDescriptorString("()V", Leak.class.getClassLoader());
+          // findSpecial leaks some native mem
+          MethodHandle mh = lookup.findSpecial(Leak.class, "callMe", mt, Leak.class);
+          mh.invokeExact(leak);
+        }
+
+        System.gc();  // make mh unused
+      }
+    }
+
+    public static void test(String gc) throws Throwable {
+       // Run this Leak class with logging
+        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+                                      "-Xlog:membername+table=trace",
+                                      gc, Leak.class.getName());
+        OutputAnalyzer output = new OutputAnalyzer(pb.start());
+        output.shouldContain("ResolvedMethod entry added for MemberNameLeak$Leak.callMe()V");
+        output.shouldContain("ResolvedMethod entry found for MemberNameLeak$Leak.callMe()V");
+        output.shouldContain("ResolvedMethod entry removed for MemberNameLeak$Leak.callMe()V");
+        output.shouldHaveExitValue(0);
+    }
+
+    public static void main(java.lang.String[] unused) throws Throwable {
+        test("-XX:+UseG1GC");
+        test("-XX:+UseParallelGC");
+        test("-XX:+UseSerialGC");
+        test("-XX:+UseConcMarkSweepGC");
+    }
+}