author | cjplummer |
Mon, 25 Apr 2016 12:11:58 -0700 | |
changeset 38079 | fd24ad51113a |
parent 26067 | b32ccc3a76c9 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* - Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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attila
parents:
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* |
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* - Neither the name of Oracle nor the names of its |
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* contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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8055199: Tidy up Nashorn codebase for code standards (August 2014)
attila
parents:
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changeset
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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// Usage: jjs disassemble.js -- <.class-file-path> |
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// Simple .class disassembler that uses bundled ObjectWeb ASM |
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// classes in jdk8. WARNING: Bundled ObjectWeb ASM classes are |
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// not part of official jdk8 API. It can be changed/removed |
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// without notice. So, this script is brittle by design! |
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// This example demonstrates passing arguments to script |
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// from jjs command line, nio and ASM usage. |
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// classes used |
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var FileSystems = Java.type("java.nio.file.FileSystems"); |
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var Files = Java.type("java.nio.file.Files"); |
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var System = Java.type("java.lang.System"); |
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var PrintWriter = Java.type("java.io.PrintWriter"); |
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// WARNING: uses non-API classes of jdk8! |
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var ClassReader = Java.type("jdk.internal.org.objectweb.asm.ClassReader"); |
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var TraceClassVisitor = Java.type("jdk.internal.org.objectweb.asm.util.TraceClassVisitor"); |
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// convert file name to Path instance |
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function path(file) { |
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return FileSystems.default.getPath(file); |
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} |
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// read all file content as a byte[] |
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function readAllBytes(file) { |
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return Files.readAllBytes(path(file)); |
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} |
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// disassemble .class byte[] and prints output to stdout |
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function disassemble(bytecode) { |
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var pw = new PrintWriter(System.out); |
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new ClassReader(bytecode).accept(new TraceClassVisitor(pw), 0); |
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} |
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// check for command line arg (for .class file name) |
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if (arguments.length == 0 || !arguments[0].endsWith('.class')) { |
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print("Usage: jjs disassemble -- <.class file>"); |
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exit(1); |
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} |
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// disassemble the given .class file |
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disassemble(readAllBytes(arguments[0])); |