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/*
* Copyright (c) 2010, 2015, 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 6999210
* @summary javac should be able to warn of anomalous conditions in classfiles
* @modules jdk.compiler
*/
import java.io.*;
import java.util.*;
public class T6999210 {
public static void main(String... args) throws Exception {
new T6999210().run();
}
void run() throws Exception {
File srcDir = new File("src");
File classesDir = new File("classes");
classesDir.mkdirs();
File c_java = writeFile(srcDir, "C.java", "class C { }");
compile("-d", classesDir.getPath(), c_java.getPath());
File c_class = new File(classesDir, "C.class");
setMajorVersion(c_class, 48);
File d_java = writeFile(srcDir, "D.java", "class D { C c; }");
// verify no warning if -Xlint:classfile not enabled
String out1 = compile(
"-d", classesDir.getPath(),
"-classpath", classesDir.getPath(),
d_java.getPath());
if (out1.length() > 0)
error("unexpected output from javac");
// sanity check of warning when -XDrawDiagnostics not used
String out2 = compile(
"-d", classesDir.getPath(),
"-classpath", classesDir.getPath(),
"-Xlint:classfile",
d_java.getPath());
if (!out2.contains("[classfile]"))
error("expected output \"[classfile]\" not found");
// check specific details, using -XDrawDiagnostics
String out3 = compile(
"-d", classesDir.getPath(),
"-classpath", classesDir.getPath(),
"-Xlint:classfile", "-XDrawDiagnostics",
d_java.getPath());
String expect = "C.class:-:-: compiler.warn.future.attr: Signature, 49, 0, 48, 0";
if (!out3.contains(expect))
error("expected output \"" + expect + "\" not found");
if (errors > 0)
throw new Exception(errors + " errors occurred");
}
String compile(String... args) throws Exception {
System.err.println("compile: " + Arrays.asList(args));
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
int rc = com.sun.tools.javac.Main.compile(args, pw);
pw.close();
String out = sw.toString();
if (out.length() > 0)
System.err.println(out);
if (rc != 0)
throw new Exception("compilation failed, rc=" + rc);
return out;
}
void setMajorVersion(File f, int major) throws IOException {
int len = (int) f.length();
byte[] data = new byte[len];
try (DataInputStream in = new DataInputStream(new FileInputStream(f))) {
in.readFully(data);
}
// u4 magic
// u2 minor
data[6] = (byte) (major >> 8);
data[7] = (byte) (major & 0xff);
try (FileOutputStream out = new FileOutputStream(f)) {
out.write(data);
}
}
File writeFile(File dir, String path, String body) throws IOException {
File f = new File(dir, path);
f.getParentFile().mkdirs();
try (FileWriter out = new FileWriter(f)) {
out.write(body);
}
return f;
}
void error(String msg) {
System.err.println("Error: " + msg);
errors++;
}
int errors;
}
¤ Dauer der Verarbeitung: 0.17 Sekunden
(vorverarbeitet)
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