Mercurial > jdk8-mips64-public > nashorn / file revision
samples/jd.js@2f1b9f4daec1
samples/jd.js
Fri, 05 Jun 2015 12:38:53 +0200
- author
- mhaupt
- date
- Fri, 05 Jun 2015 12:38:53 +0200
- changeset 1398
- 2f1b9f4daec1
- parent 1213
- 98f6e6355a67
- permissions
- -rw-r--r--
8080087: Nashorn $ENV.PWD is originally undefined
Summary: On Windows, the PWD environment variable does not exist and cannot be imported in scripting mode, so it is set explicitly.
Reviewed-by: lagergren, sundar
1 #// Usage: jjs -cp <asmtools.jar> jd.js -- <classname> [jdis|jdec]
3 /*
4 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * - Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * - Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * - Neither the name of Oracle nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
22 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
25 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
28 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
34 // javap-like disassembler/decoder tool that disassembles/decodes
35 // java classes but with OpenJDK AsmTools disassembler/decoder syntax.
36 // You need to build asmtool.jar from OpenJDK codetools project
37 // specify it with -cp option.
39 // See also https://wiki.openjdk.java.net/display/CodeTools/AsmTools
41 function usage() {
42 print("Usage: jjs -cp <asmtools.jar> jd.js -- <classname> [jdis|jdec]");
43 exit(1);
44 }
46 if (arguments.length == 0) {
47 usage();
48 }
50 // argument handling
51 // convert to internal class name
52 var className = arguments[0].replaceAll('\\.', '/');
53 var tool;
54 if (arguments.length > 1) {
55 tool = arguments[1];
56 switch (tool) {
57 case 'jdis':
58 case 'jdec':
59 break;
60 default:
61 usage();
62 }
63 } else {
64 tool = "jdis"; // default tool
65 }
67 // Java classes used
68 var AsmTools = Java.type("org.openjdk.asmtools.Main");
69 var Files = Java.type("java.nio.file.Files");
70 var StandardCopyOption = Java.type("java.nio.file.StandardCopyOption");
72 // retrive input stream for .class bytes
73 var cl = AsmTools.class.classLoader;
74 var res = cl.getResource(className + ".class");
76 if (res) {
77 var is = res.openStream();
78 var tmpPath;
79 try {
80 // copy the content of the .class to a temp file
81 tmpPath = Files.createTempFile("asmtools-", ".class");
82 // mark as delete-on-exit
83 tmpPath.toFile().deleteOnExit();
84 Files.copy(is, tmpPath, [ StandardCopyOption.REPLACE_EXISTING ]);
85 } finally {
86 is.close();
87 }
89 // invoke asmtools Main
90 AsmTools.main([ tool, tmpPath.toString() ]);
91 } else {
92 print("no such class: " + arguments[0]);
93 exit(1);
94 }
