1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/samples/jd.js Wed Jan 07 14:02:30 2015 +0530
1.3 @@ -0,0 +1,94 @@
1.4 +#// Usage: jjs -cp <asmtools.jar> jd.js -- <classname> [jdis|jdec]
1.5 +
1.6 +/*
1.7 + * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
1.8 + *
1.9 + * Redistribution and use in source and binary forms, with or without
1.10 + * modification, are permitted provided that the following conditions
1.11 + * are met:
1.12 + *
1.13 + * - Redistributions of source code must retain the above copyright
1.14 + * notice, this list of conditions and the following disclaimer.
1.15 + *
1.16 + * - Redistributions in binary form must reproduce the above copyright
1.17 + * notice, this list of conditions and the following disclaimer in the
1.18 + * documentation and/or other materials provided with the distribution.
1.19 + *
1.20 + * - Neither the name of Oracle nor the names of its
1.21 + * contributors may be used to endorse or promote products derived
1.22 + * from this software without specific prior written permission.
1.23 + *
1.24 + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
1.25 + * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
1.26 + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1.27 + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
1.28 + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
1.29 + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
1.30 + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
1.31 + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
1.32 + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
1.33 + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
1.34 + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.35 + */
1.36 +
1.37 +// javap-like disassembler/decoder tool that disassembles/decodes
1.38 +// java classes but with OpenJDK AsmTools disassembler/decoder syntax.
1.39 +// You need to build asmtool.jar from OpenJDK codetools project
1.40 +// specify it with -cp option.
1.41 +
1.42 +// See also https://wiki.openjdk.java.net/display/CodeTools/AsmTools
1.43 +
1.44 +function usage() {
1.45 + print("Usage: jjs -cp <asmtools.jar> jd.js -- <classname> [jdis|jdec]");
1.46 + exit(1);
1.47 +}
1.48 +
1.49 +if (arguments.length == 0) {
1.50 + usage();
1.51 +}
1.52 +
1.53 +// argument handling
1.54 +// convert to internal class name
1.55 +var className = arguments[0].replaceAll('\\.', '/');
1.56 +var tool;
1.57 +if (arguments.length > 1) {
1.58 + tool = arguments[1];
1.59 + switch (tool) {
1.60 + case 'jdis':
1.61 + case 'jdec':
1.62 + break;
1.63 + default:
1.64 + usage();
1.65 + }
1.66 +} else {
1.67 + tool = "jdis"; // default tool
1.68 +}
1.69 +
1.70 +// Java classes used
1.71 +var AsmTools = Java.type("org.openjdk.asmtools.Main");
1.72 +var Files = Java.type("java.nio.file.Files");
1.73 +var StandardCopyOption = Java.type("java.nio.file.StandardCopyOption");
1.74 +
1.75 +// retrive input stream for .class bytes
1.76 +var cl = AsmTools.class.classLoader;
1.77 +var res = cl.getResource(className + ".class");
1.78 +
1.79 +if (res) {
1.80 + var is = res.openStream();
1.81 + var tmpPath;
1.82 + try {
1.83 + // copy the content of the .class to a temp file
1.84 + tmpPath = Files.createTempFile("asmtools-", ".class");
1.85 + // mark as delete-on-exit
1.86 + tmpPath.toFile().deleteOnExit();
1.87 + Files.copy(is, tmpPath, [ StandardCopyOption.REPLACE_EXISTING ]);
1.88 + } finally {
1.89 + is.close();
1.90 + }
1.91 +
1.92 + // invoke asmtools Main
1.93 + AsmTools.main([ tool, tmpPath.toString() ]);
1.94 +} else {
1.95 + print("no such class: " + arguments[0]);
1.96 + exit(1);
1.97 +}
