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