aoqi@0: /*
aoqi@0:  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: /*
aoqi@0:  * @test
aoqi@0:  * @bug 6999210
aoqi@0:  * @summary javac should be able to warn of anomalous conditions in classfiles
aoqi@0:  */
aoqi@0: 
aoqi@0: import java.io.*;
aoqi@0: import java.util.*;
aoqi@0: 
aoqi@0: public class T6999210 {
aoqi@0:     public static void main(String... args) throws Exception {
aoqi@0:         new T6999210().run();
aoqi@0:     }
aoqi@0: 
aoqi@0:     void run() throws Exception {
aoqi@0:         File srcDir = new File("src");
aoqi@0:         File classesDir = new File("classes");
aoqi@0:         classesDir.mkdirs();
aoqi@0: 
aoqi@0:         File c_java = writeFile(srcDir, "C.java", "class C<T> { }");
aoqi@0:         compile("-d", classesDir.getPath(), c_java.getPath());
aoqi@0:         File c_class = new File(classesDir, "C.class");
aoqi@0:         setMajorVersion(c_class, 48);
aoqi@0:         File d_java = writeFile(srcDir, "D.java", "class D { C c; }");
aoqi@0: 
aoqi@0:         // verify no warning if -Xlint:classfile not enabled
aoqi@0:         String out1 = compile(
aoqi@0:             "-d", classesDir.getPath(),
aoqi@0:             "-classpath", classesDir.getPath(),
aoqi@0:             d_java.getPath());
aoqi@0:         if (out1.length() > 0)
aoqi@0:             error("unexpected output from javac");
aoqi@0: 
aoqi@0:         // sanity check of warning when -XDrawDiagnostics not used
aoqi@0:         String out2 = compile(
aoqi@0:             "-d", classesDir.getPath(),
aoqi@0:             "-classpath", classesDir.getPath(),
aoqi@0:             "-Xlint:classfile",
aoqi@0:             d_java.getPath());
aoqi@0:         if (!out2.contains("[classfile]"))
aoqi@0:             error("expected output \"[classfile]\" not found");
aoqi@0: 
aoqi@0:         // check specific details, using -XDrawDiagnostics
aoqi@0:         String out3 = compile(
aoqi@0:             "-d", classesDir.getPath(),
aoqi@0:             "-classpath", classesDir.getPath(),
aoqi@0:             "-Xlint:classfile", "-XDrawDiagnostics",
aoqi@0:             d_java.getPath());
aoqi@0:         String expect = "C.class:-:-: compiler.warn.future.attr: Signature, 49, 0, 48, 0";
aoqi@0:         if (!out3.contains(expect))
aoqi@0:             error("expected output \"" + expect + "\" not found");
aoqi@0: 
aoqi@0:         if (errors > 0)
aoqi@0:             throw new Exception(errors + " errors occurred");
aoqi@0:     }
aoqi@0: 
aoqi@0:     String compile(String... args) throws Exception {
aoqi@0:         System.err.println("compile: " + Arrays.asList(args));
aoqi@0:         StringWriter sw = new StringWriter();
aoqi@0:         PrintWriter pw = new PrintWriter(sw);
aoqi@0:         int rc = com.sun.tools.javac.Main.compile(args, pw);
aoqi@0:         pw.close();
aoqi@0:         String out = sw.toString();
aoqi@0:         if (out.length() > 0)
aoqi@0:             System.err.println(out);
aoqi@0:         if (rc != 0)
aoqi@0:             throw new Exception("compilation failed, rc=" + rc);
aoqi@0:         return out;
aoqi@0:     }
aoqi@0: 
aoqi@0:     void setMajorVersion(File f, int major) throws IOException {
aoqi@0:         int len = (int) f.length();
aoqi@0:         byte[] data = new byte[len];
aoqi@0:         try (DataInputStream in = new DataInputStream(new FileInputStream(f))) {
aoqi@0:             in.readFully(data);
aoqi@0:         }
aoqi@0:         // u4 magic
aoqi@0:         // u2 minor
aoqi@0:         data[6] = (byte) (major >> 8);
aoqi@0:         data[7] = (byte) (major & 0xff);
aoqi@0:         try (FileOutputStream out = new FileOutputStream(f)) {
aoqi@0:             out.write(data);
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     File writeFile(File dir, String path, String body) throws IOException {
aoqi@0:         File f = new File(dir, path);
aoqi@0:         f.getParentFile().mkdirs();
aoqi@0:         try (FileWriter out = new FileWriter(f)) {
aoqi@0:             out.write(body);
aoqi@0:         }
aoqi@0:         return f;
aoqi@0:     }
aoqi@0: 
aoqi@0:     void error(String msg) {
aoqi@0:         System.err.println("Error: " + msg);
aoqi@0:         errors++;
aoqi@0:     }
aoqi@0: 
aoqi@0:     int errors;
aoqi@0: }