jdk

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/*
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 * Copyright (c) 2007, 2016, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/*
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 * @test
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 * @bug 6627362
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 * @summary javac generates code that uses array.clone,
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 *          which is not available on JavaCard
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 * @modules jdk.compiler
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 *          jdk.jdeps/com.sun.tools.javap
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 */
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import java.io.*;
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import java.lang.reflect.*;
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import java.net.*;
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import java.util.*;
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public class T6627362 {
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    static String testSrc = System.getProperty("test.src", ".");
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    public static void main(String... args) throws Exception {
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        new T6627362().run();
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    }
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    public void run() throws Exception {
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        testStandard();
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        testNoClone();
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        if (errors > 0)
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            throw new Error(errors + " test cases failed");
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    }
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    void testStandard() throws Exception {
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        // compile and disassemble E.java, check for reference to Object.clone()
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        File x = new File(testSrc, "x");
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        String[] jcArgs = { "-d", ".",
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                            new File(x, "E.java").getPath() };
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        compile(jcArgs);
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        String[] jpArgs = { "-classpath", ".", "-c", "E" };
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        StringWriter sw = new StringWriter();
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        javap(new PrintWriter(sw, true), jpArgs);
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        check(sw.toString(), "Method \"[LE;\".clone:()Ljava/lang/Object;");
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        callValues();
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    }
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    void testNoClone() throws Exception {
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        // compile and disassemble E.java, using modified Object.java,
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        // check for reference to System.arraycopy
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        File x = new File(testSrc, "x");
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        String[] jcArgs = { "-d", ".", "--patch-module", "java.base=" + x.getAbsolutePath(),
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                            new File(x, "E.java").getPath(),
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                            new File(new File(new File(x, "java"), "lang"), "Object.java").getPath()};
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        compile(jcArgs);
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        String[] jpArgs = { "-classpath", ".", "-c", "E" };
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        StringWriter sw = new StringWriter();
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        javap(new PrintWriter(sw, true), jpArgs);
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        check(sw.toString(), "// Method java/lang/System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V");
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        callValues();
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    }
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    void compile(String... args) {
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        int rc = com.sun.tools.javac.Main.compile(args);
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        if (rc != 0)
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            throw new Error("javac failed: " + Arrays.asList(args) + ": " + rc);
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    }
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    void javap(PrintWriter out, String... args) throws Exception {
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        int rc = com.sun.tools.javap.Main.run(args, out);
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        if (rc != 0)
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            throw new Error("javap failed: " + Arrays.asList(args) + ": " + rc);
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    }
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    void check(String s, String require) {
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        System.out.println("Checking:\n" + s);
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        if (s.indexOf(require) == -1) {
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            System.err.println("Can't find " + require);
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            errors++;
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        }
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    }
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    void callValues() {
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        try {
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            File dot = new File(System.getProperty("user.dir"));
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            ClassLoader cl = new URLClassLoader(new URL[] { dot.toURL() });
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            Class<?> e_class = cl.loadClass("E");
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            Method m = e_class.getMethod("values", new Class[] { });
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            //System.err.println(m);
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            Object o = m.invoke(null, (Object[]) null);
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            List<Object> v = Arrays.asList((Object[]) o);
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            if (!v.toString().equals("[a, b, c]"))
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                throw new Error("unexpected result for E.values(): " + v);
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        } catch (Exception e) {
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            throw new Error(e);
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        }
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    }
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    int errors;
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}
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