--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/langtools/tools/javah/4942232/Test.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,142 @@
+/*
+ * Copyright (c) 2010, 2016, 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 4942232
+ * @summary missing param class processes without error
+ * @modules jdk.compiler/com.sun.tools.javah
+ * @build ParamClassTest Test
+ * @run main Test
+ */
+
+import java.io.*;
+import java.util.*;
+
+public class Test {
+    public static void main(String... args) throws Exception {
+        new Test().run();
+    }
+
+    void run() throws Exception {
+        File testSrc = new File(System.getProperty("test.src"));
+        File testClasses = new File(System.getProperty("test.classes"));
+
+        // standard use of javah on valid class file
+        String[] test1Args = {
+            "-d", mkdir("test1/out").getPath(),
+            "-classpath", testClasses.getPath(),
+            "ParamClassTest"
+        };
+        test(test1Args, 0);
+
+        // extended use of javah on valid source file
+        String[] test2Args = {
+            "-d", mkdir("test2/out").getPath(),
+            "-classpath", testSrc.getPath(),
+            "ParamClassTest"
+        };
+        test(test2Args, 0);
+
+        // javah on class file with missing referents
+        File test3Classes = mkdir("test3/classes");
+        copy(new File(testClasses, "ParamClassTest.class"), test3Classes);
+        String[] test3Args = {
+            "-d", mkdir("test3/out").getPath(),
+            "-classpath", test3Classes.getPath(),
+            "ParamClassTest"
+        };
+        test(test3Args, 1);
+
+        // javah on source file with missing referents
+        File test4Src = mkdir("test4/src");
+        String paramClassTestSrc = readFile(new File(testSrc, "ParamClassTest.java"));
+        writeFile(new File(test4Src, "ParamClassTest.java"),
+                paramClassTestSrc.replaceAll("class Param \\{\\s+\\}", ""));
+        String[] test4Args = {
+            "-d", mkdir("test4/out").getPath(),
+            "-classpath", test4Src.getPath(),
+            "ParamClassTest"
+        };
+        test(test4Args, 15);
+
+        if (errors > 0)
+            throw new Exception(errors + " errors occurred");
+    }
+
+    void test(String[] args, int expect) {
+        System.err.println("test: " + Arrays.asList(args));
+        int rc = javah(args);
+        if (rc != expect)
+            error("Unexpected return code: " + rc + "; expected: " + expect);
+    }
+
+    int javah(String... args) {
+        StringWriter sw = new StringWriter();
+        PrintWriter pw = new PrintWriter(sw);
+        int rc = com.sun.tools.javah.Main.run(args, pw);
+        pw.close();
+        String out = sw.toString();
+        if (!out.isEmpty())
+            System.err.println(out);
+        return rc;
+    }
+
+    File mkdir(String path) {
+        File f = new File(path);
+        f.mkdirs();
+        return f;
+    }
+
+    void copy(File from, File to) throws IOException {
+        if (to.isDirectory())
+            to = new File(to, from.getName());
+        try (DataInputStream in = new DataInputStream(new FileInputStream(from));
+                FileOutputStream out = new FileOutputStream(to)) {
+            byte[] buf = new byte[(int) from.length()];
+            in.readFully(buf);
+            out.write(buf);
+        }
+    }
+
+    String readFile(File f) throws IOException {
+        try (DataInputStream in = new DataInputStream(new FileInputStream(f))) {
+            byte[] buf = new byte[(int) f.length()];
+            in.readFully(buf);
+            return new String(buf);
+        }
+    }
+
+    void writeFile(File f, String body) throws IOException {
+        try (FileWriter out = new FileWriter(f)) {
+            out.write(body);
+        }
+    }
+
+    void error(String msg) {
+        System.err.println(msg);
+        errors++;
+    }
+
+    int errors;
+}