sundar@1213: #// Usage: jjs -cp <asmtools.jar> jd.js -- <classname> [jdis|jdec]
sundar@1213: 
sundar@1213: /*
sundar@1213:  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
sundar@1213:  *
sundar@1213:  * Redistribution and use in source and binary forms, with or without
sundar@1213:  * modification, are permitted provided that the following conditions
sundar@1213:  * are met:
sundar@1213:  *
sundar@1213:  *   - Redistributions of source code must retain the above copyright
sundar@1213:  *     notice, this list of conditions and the following disclaimer.
sundar@1213:  *
sundar@1213:  *   - Redistributions in binary form must reproduce the above copyright
sundar@1213:  *     notice, this list of conditions and the following disclaimer in the
sundar@1213:  *     documentation and/or other materials provided with the distribution.
sundar@1213:  *
sundar@1213:  *   - Neither the name of Oracle nor the names of its
sundar@1213:  *     contributors may be used to endorse or promote products derived
sundar@1213:  *     from this software without specific prior written permission.
sundar@1213:  *
sundar@1213:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
sundar@1213:  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
sundar@1213:  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
sundar@1213:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
sundar@1213:  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
sundar@1213:  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
sundar@1213:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
sundar@1213:  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
sundar@1213:  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
sundar@1213:  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
sundar@1213:  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
sundar@1213:  */
sundar@1213: 
sundar@1213: // javap-like disassembler/decoder tool that disassembles/decodes 
sundar@1213: // java classes but with OpenJDK AsmTools disassembler/decoder syntax.
sundar@1213: // You need to build asmtool.jar from OpenJDK codetools project
sundar@1213: // specify it with -cp option.
sundar@1213: 
sundar@1213: // See also https://wiki.openjdk.java.net/display/CodeTools/AsmTools
sundar@1213: 
sundar@1213: function usage() {
sundar@1213:     print("Usage: jjs -cp <asmtools.jar> jd.js -- <classname> [jdis|jdec]");
sundar@1213:     exit(1);
sundar@1213: }
sundar@1213: 
sundar@1213: if (arguments.length == 0) {
sundar@1213:     usage();
sundar@1213: }
sundar@1213: 
sundar@1213: // argument handling
sundar@1213: // convert to internal class name
sundar@1213: var className = arguments[0].replaceAll('\\.', '/');
sundar@1213: var tool;
sundar@1213: if (arguments.length > 1) {
sundar@1213:     tool = arguments[1];
sundar@1213:     switch (tool) {
sundar@1213:         case 'jdis':
sundar@1213:         case 'jdec':
sundar@1213:             break;
sundar@1213:         default:
sundar@1213:             usage();
sundar@1213:     }
sundar@1213: } else {
sundar@1213:     tool = "jdis"; // default tool
sundar@1213: }
sundar@1213: 
sundar@1213: // Java classes used
sundar@1213: var AsmTools = Java.type("org.openjdk.asmtools.Main");
sundar@1213: var Files = Java.type("java.nio.file.Files");
sundar@1213: var StandardCopyOption = Java.type("java.nio.file.StandardCopyOption");
sundar@1213: 
sundar@1213: // retrive input stream for .class bytes
sundar@1213: var cl = AsmTools.class.classLoader;
sundar@1213: var res = cl.getResource(className + ".class");
sundar@1213: 
sundar@1213: if (res) {
sundar@1213:     var is = res.openStream();
sundar@1213:     var tmpPath;
sundar@1213:     try {
sundar@1213:         // copy the content of the .class to a temp file
sundar@1213:         tmpPath = Files.createTempFile("asmtools-", ".class");
sundar@1213:         // mark as delete-on-exit
sundar@1213:         tmpPath.toFile().deleteOnExit();
sundar@1213:         Files.copy(is, tmpPath, [ StandardCopyOption.REPLACE_EXISTING ]);
sundar@1213:     } finally {
sundar@1213:         is.close();
sundar@1213:     } 
sundar@1213: 
sundar@1213:     // invoke asmtools Main
sundar@1213:     AsmTools.main([ tool, tmpPath.toString() ]);
sundar@1213: } else {
sundar@1213:     print("no such class: " + arguments[0]);
sundar@1213:     exit(1);
sundar@1213: }