jjg@46: /*
jjg@46:  * Copyright 2008 Sun Microsystems, Inc.  All Rights Reserved.
jjg@46:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
jjg@46:  *
jjg@46:  * This code is free software; you can redistribute it and/or modify it
jjg@46:  * under the terms of the GNU General Public License version 2 only, as
jjg@46:  * published by the Free Software Foundation.
jjg@46:  *
jjg@46:  * This code is distributed in the hope that it will be useful, but WITHOUT
jjg@46:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
jjg@46:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
jjg@46:  * version 2 for more details (a copy is included in the LICENSE file that
jjg@46:  * accompanied this code).
jjg@46:  *
jjg@46:  * You should have received a copy of the GNU General Public License version
jjg@46:  * 2 along with this work; if not, write to the Free Software Foundation,
jjg@46:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
jjg@46:  *
jjg@46:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
jjg@46:  * CA 95054 USA or visit www.sun.com if you need additional information or
jjg@46:  * have any questions.
jjg@46:  */
jjg@46: 
jjg@46: /*
jjg@46:  * @test
jjg@46:  * @bug 6622260
jjg@46:  * @summary javap prints negative bytes incorrectly in hex
jjg@46:  */
jjg@46: 
jjg@46: import java.io.*;
jjg@46: 
jjg@46: public class T6622260 {
jjg@46:     public static void main(String[] args) throws Exception {
jjg@46:         new T6622260().run();
jjg@46:     }
jjg@46: 
jjg@46:     public void run() throws IOException {
jjg@46:         File javaFile = writeTestFile();
jjg@46:         File classFile = compileTestFile(javaFile);
jjg@46:         modifyClassFile(classFile);
jjg@46:         String output = javap(classFile);
jjg@46:         verify(output);
jjg@46:     }
jjg@46: 
jjg@46:     File writeTestFile() throws IOException {
jjg@46:         File f = new File("Test.java");
jjg@46:         PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(f)));
jjg@46:         out.println("@Deprecated class Test { int f; void m() { } }");
jjg@46:         out.close();
jjg@46:         return f;
jjg@46:     }
jjg@46: 
jjg@46:     File compileTestFile(File f) {
jjg@46:         int rc = com.sun.tools.javac.Main.compile(new String[] { f.getPath() });
jjg@46:         if (rc != 0)
jjg@46:             throw new Error("compilation failed. rc=" + rc);
jjg@46:         String path = f.getPath();
jjg@46:         return new File(path.substring(0, path.length() - 5) + ".class");
jjg@46:     }
jjg@46: 
jjg@46:     void modifyClassFile(File f) throws IOException {
jjg@46:         String newAttributeName = "NonstandardAttribute";
jjg@46:         byte[] newAttributeData = { 0, 1, 2, 127, (byte)128, (byte)129, (byte)254, (byte)255 };
jjg@46: 
jjg@46:         DataInputStream in = new DataInputStream(new FileInputStream(f));
jjg@46:         byte[] data = new byte[(int) f.length()];
jjg@46:         in.readFully(data);
jjg@46:         in.close();
jjg@46: 
jjg@46:         in = new DataInputStream(new ByteArrayInputStream(data));
jjg@46:         in.skipBytes(4); // magic
jjg@46:         in.skipBytes(2); // minor
jjg@46:         in.skipBytes(2); // minor
jjg@46: 
jjg@46:         int constantPoolPos = data.length - in.available();
jjg@46:         int constant_pool_count = skipConstantPool(in);
jjg@46: 
jjg@46:         int flagsPos = data.length - in.available();
jjg@46:         in.skipBytes(2); // access_flags
jjg@46:         in.skipBytes(2); // this_class
jjg@46:         in.skipBytes(2); // super_class
jjg@46: 
jjg@46:         int interfaces_count = in.readUnsignedShort();
jjg@46:         in.skipBytes(interfaces_count * 2);
jjg@46: 
jjg@46:         int field_count = in.readUnsignedShort();
jjg@46:         for (int i = 0; i < field_count; i++) {
jjg@46:             in.skipBytes(6); // access_flags, name_index, descriptor_index
jjg@46:             skipAttributes(in);
jjg@46:         }
jjg@46: 
jjg@46:         int method_count = in.readUnsignedShort();
jjg@46:         for (int i = 0; i < method_count; i++) {
jjg@46:             in.skipBytes(6); // access_flags, name_index, descriptor_index
jjg@46:             skipAttributes(in);
jjg@46:         }
jjg@46: 
jjg@46:         int classAttributesPos = data.length - in.available();
jjg@46:         int attributes_count = in.readUnsignedShort();
jjg@46: 
jjg@46:         f.renameTo(new File(f.getPath() + ".BAK"));
jjg@46:         DataOutputStream out = new DataOutputStream(new FileOutputStream(f));
jjg@46: 
jjg@46:         // copy head
jjg@46:         out.write(data, 0, constantPoolPos);
jjg@46: 
jjg@46:         // copy constant pool, adding in name of new attribute
jjg@46:         out.writeShort(constant_pool_count + 1);
jjg@46:         out.write(data, constantPoolPos + 2, flagsPos - constantPoolPos - 2);
jjg@46:         out.write(1); // CONSTANT_Utf8
jjg@46:         out.writeUTF(newAttributeName);
jjg@46: 
jjg@46:         // copy flags, class, superclass, interfaces, fields and methods
jjg@46:         out.write(data, flagsPos, classAttributesPos - flagsPos);
jjg@46: 
jjg@46:         // copy class attributes, adding in new attribute
jjg@46:         out.writeShort(attributes_count + 1);
jjg@46:         out.write(data, classAttributesPos + 2, data.length - classAttributesPos - 2);
jjg@46:         out.writeShort(constant_pool_count); // index of new attribute name
jjg@46:         out.writeInt(newAttributeData.length);
jjg@46:         out.write(newAttributeData);
jjg@46:         out.close();
jjg@46:     }
jjg@46: 
jjg@46:     int skipConstantPool(DataInputStream in) throws IOException {
jjg@46:         int constant_pool_count = in.readUnsignedShort();
jjg@46:         for (int i = 1; i < constant_pool_count; i++) {
jjg@46:             int tag = in.readUnsignedByte();
jjg@46:             switch (tag) {
jjg@46:             case  1: // CONSTANT_Utf8
jjg@46:                 int length = in.readUnsignedShort();
jjg@46:                 in.skipBytes(length); // bytes
jjg@46:                 break;
jjg@46: 
jjg@46:             case  3: // CONSTANT_Integer
jjg@46:             case  4: // CONSTANT_Float
jjg@46:                 in.skipBytes(4); // bytes
jjg@46:                 break;
jjg@46: 
jjg@46:             case  5: // CONSTANT_Long
jjg@46:             case  6: // CONSTANT_Double
jjg@46:                 in.skipBytes(8); // high_bytes, low_bytes
jjg@46:                 break;
jjg@46: 
jjg@46:             case  7: // CONSTANT_Class
jjg@46:                 in.skipBytes(2); // name_index
jjg@46:                 break;
jjg@46: 
jjg@46:             case  8: // CONSTANT_String
jjg@46:                 in.skipBytes(2); // string_index
jjg@46:                 break;
jjg@46: 
jjg@46:             case  9: // CONSTANT_FieldRef
jjg@46:             case 10: // CONSTANT_Methodref
jjg@46:             case 11: // CONSTANT_InterfaceMethodref
jjg@46:                 in.skipBytes(4); // class_index, name_and_type_index
jjg@46:                 break;
jjg@46: 
jjg@46:             case 12: // CONSTANT_NameAndType
jjg@46:                 in.skipBytes(4); // name_index, descriptor_index
jjg@46:                 break;
jjg@46: 
jjg@46:             default:
jjg@46:                 throw new Error("constant pool tag: " + tag);
jjg@46:             }
jjg@46:         }
jjg@46:         return constant_pool_count;
jjg@46:     }
jjg@46: 
jjg@46:     int skipAttributes(DataInputStream in) throws IOException {
jjg@46:         int attributes_count = in.readUnsignedShort();
jjg@46:         for (int i = 0; i < attributes_count; i++) {
jjg@46:             in.skipBytes(2); // attribute_name_index;
jjg@46:             int length = in.readInt();
jjg@46:             in.skipBytes(length); // info
jjg@46:         }
jjg@46:         return attributes_count;
jjg@46:     }
jjg@46: 
jjg@46:     String javap(File f) {
jjg@46:         StringWriter sw = new StringWriter();
jjg@46:         PrintWriter out = new PrintWriter(sw);
jjg@46:         int rc = com.sun.tools.javap.Main.run(new String[] { "-v", f.getPath() }, out);
jjg@46:         if (rc != 0)
jjg@46:             throw new Error("javap failed. rc=" + rc);
jjg@46:         out.close();
jjg@46:         return sw.toString();
jjg@46:     }
jjg@46: 
jjg@46:     void verify(String output) {
jjg@46:         System.out.println(output);
jjg@46:         if (output.indexOf("-") >= 0)
jjg@46:             throw new Error("- found in output");
jjg@46:         if (output.indexOf("FFFFFF") >= 0)
jjg@46:             throw new Error("FFFFFF found in output");
jjg@46:     }
jjg@46: }