test/hotspot/jtreg/runtime/exceptionMsgs/NullPointerException/NPEInHiddenTopFrameTest.java
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/exceptionMsgs/NullPointerException/NPEInHiddenTopFrameTest.java Tue Mar 19 16:16:39 2019 +0100
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019 SAP SE. 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
+ * @summary Test NullPointerException messages thrown in frames that
+ * are hidden in the backtrace/stackTrace.
+ * @library /test/lib
+ * @compile -g NPEInHiddenTopFrameTest.java
+ * @run main/othervm -XX:-ShowHiddenFrames NPEInHiddenTopFrameTest hidden
+ * @run main/othervm -XX:+ShowHiddenFrames NPEInHiddenTopFrameTest visible
+ */
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.util.ArrayList;
+
+import jdk.test.lib.Asserts;
+
+/**
+ * Tests NullPointerExceptions
+ */
+public class NPEInHiddenTopFrameTest {
+
+ @FunctionalInterface
+ private static interface SomeFunctionalInterface {
+ String someMethod(String a, String b);
+ }
+
+ public static void checkMessage(String expression,
+ String obtainedMsg, String expectedMsg) {
+ System.out.println();
+ System.out.println(" source code: " + expression);
+ System.out.println(" thrown msg: " + obtainedMsg);
+ System.out.println("expected msg: " + expectedMsg);
+ if (obtainedMsg == null && expectedMsg == null) return;
+ Asserts.assertEquals(obtainedMsg, expectedMsg);
+ }
+
+ public static void main(String[] args) throws Exception {
+ boolean framesAreHidden = false;
+ if (args.length > 0) {
+ String arg = (String)args[0];
+ if (arg.equals("hidden")) framesAreHidden = true;
+ }
+
+ try {
+ final SomeFunctionalInterface concatter = String::concat;
+ final String nullString = null;
+ if (concatter != null) {
+ concatter.someMethod(nullString, "validString");
+ }
+ } catch (NullPointerException e) {
+ checkMessage("concatter.someMethod(nullString, \"validString\");", e.getMessage(),
+ framesAreHidden ?
+ // This is the message printed if the wrong method/bci are used.
+ //"'concatter' is null. " +
+ //"Can not invoke method 'NPEInHiddenTopFrameTest$SomeFunctionalInterface.someMethod(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;'." :
+ // With this fix no message is printed.
+ null :
+ // This is the corerct message, but it describes code generated on-the-fly.
+ // There is no debug information in this code.
+ "'<parameter1>' is null. " +
+ "Can not invoke method 'java.lang.String.concat(Ljava/lang/String;)Ljava/lang/String;'." );
+ }
+ }
+}
+