8136930: Simplify use of module-system options by custom launchers

Reviewed-by: coleenp, lfoltan, mchung

hotspot/test/runtime/modules/PatchModule/PatchModuleJavaBase.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 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 8130399
+ * @summary Make sure --patch-module works for java.base.
+ * @modules java.base/jdk.internal.misc
+ * @library /testlibrary
+ * @compile PatchModuleMain.java
+ * @run main PatchModuleJavaBase
+ */
+
+import jdk.test.lib.*;
+
+public class PatchModuleJavaBase {
+
+    public static void main(String[] args) throws Exception {
+        String source = "package java.lang; "                       +
+                        "public class NewClass { "                  +
+                        "    static { "                             +
+                        "        System.out.println(\"I pass!\"); " +
+                        "    } "                                    +
+                        "}";
+
+        ClassFileInstaller.writeClassToDisk("java/lang/NewClass",
+             InMemoryJavaCompiler.compile("java.lang.NewClass", source, "-Xmodule:java.base"),
+             "mods/java.base");
+
+        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("--patch-module=java.base=mods/java.base",
+             "PatchModuleMain", "java.lang.NewClass");
+
+        new OutputAnalyzer(pb.start())
+            .shouldContain("I pass!")
+            .shouldHaveExitValue(0);
+    }
+}