95 lines
3.2 KiB
JavaScript
95 lines
3.2 KiB
JavaScript
#// 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);
|
|
}
|