jdk8-mips64-public/nashorn: samples/jd.js@6a43a158f561 (annotated)

samples/jd.js@6a43a158f561 (annotated)

samples/jd.js

Wed, 23 Mar 2016 14:27:50 -0700

author: asaha
date: Wed, 23 Mar 2016 14:27:50 -0700
changeset 1861: 6a43a158f561
parent 1213: 98f6e6355a67
permissions: -rw-r--r--

Added tag jdk8u101-b00 for changeset 16d657d6cb22

 #// 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);
 }