Mercurial > jdk8-mips64-public > nashorn / annotate
samples/disassemble.js@b1a7da25b547 (annotated)
samples/disassemble.js
Wed, 27 Apr 2016 01:36:41 +0800
- author
- aoqi
- date
- Wed, 27 Apr 2016 01:36:41 +0800
- changeset 0
- b1a7da25b547
- child 962
- ac62e33a99b0
- permissions
- -rw-r--r--
Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/nashorn/
changeset: 1034:4b9cc65dd24d
tag: jdk8u25-b17
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * |
| aoqi@0 | 4 | * Redistribution and use in source and binary forms, with or without |
| aoqi@0 | 5 | * modification, are permitted provided that the following conditions |
| aoqi@0 | 6 | * are met: |
| aoqi@0 | 7 | * |
| aoqi@0 | 8 | * - Redistributions of source code must retain the above copyright |
| aoqi@0 | 9 | * notice, this list of conditions and the following disclaimer. |
| aoqi@0 | 10 | * |
| aoqi@0 | 11 | * - Redistributions in binary form must reproduce the above copyright |
| aoqi@0 | 12 | * notice, this list of conditions and the following disclaimer in the |
| aoqi@0 | 13 | * documentation and/or other materials provided with the distribution. |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * - Neither the name of Oracle nor the names of its |
| aoqi@0 | 16 | * contributors may be used to endorse or promote products derived |
| aoqi@0 | 17 | * from this software without specific prior written permission. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| aoqi@0 | 20 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| aoqi@0 | 21 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| aoqi@0 | 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| aoqi@0 | 23 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| aoqi@0 | 24 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| aoqi@0 | 25 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| aoqi@0 | 26 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| aoqi@0 | 27 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| aoqi@0 | 28 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| aoqi@0 | 29 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| aoqi@0 | 30 | */ |
| aoqi@0 | 31 | |
| aoqi@0 | 32 | // Usage: jjs disassemble.js -- <.class-file-path> |
| aoqi@0 | 33 | |
| aoqi@0 | 34 | // Simple .class disassembler that uses bundled ObjectWeb ASM |
| aoqi@0 | 35 | // classes in jdk8. WARNING: Bundled ObjectWeb ASM classes are |
| aoqi@0 | 36 | // not part of official jdk8 API. It can be changed/removed |
| aoqi@0 | 37 | // without notice. So, this script is brittle by design! |
| aoqi@0 | 38 | |
| aoqi@0 | 39 | // This example demonstrates passing arguments to script |
| aoqi@0 | 40 | // from jjs command line, nio and ASM usage. |
| aoqi@0 | 41 | |
| aoqi@0 | 42 | // classes used |
| aoqi@0 | 43 | var FileSystems = Java.type("java.nio.file.FileSystems"); |
| aoqi@0 | 44 | var Files = Java.type("java.nio.file.Files"); |
| aoqi@0 | 45 | var System = Java.type("java.lang.System"); |
| aoqi@0 | 46 | var PrintWriter = Java.type("java.io.PrintWriter"); |
| aoqi@0 | 47 | |
| aoqi@0 | 48 | // WARNING: uses non-API classes of jdk8! |
| aoqi@0 | 49 | var ClassReader = Java.type("jdk.internal.org.objectweb.asm.ClassReader"); |
| aoqi@0 | 50 | var TraceClassVisitor = Java.type("jdk.internal.org.objectweb.asm.util.TraceClassVisitor"); |
| aoqi@0 | 51 | |
| aoqi@0 | 52 | // convert file name to Path instance |
| aoqi@0 | 53 | function path(file) { |
| aoqi@0 | 54 | return FileSystems.default.getPath(file); |
| aoqi@0 | 55 | } |
| aoqi@0 | 56 | |
| aoqi@0 | 57 | // read all file content as a byte[] |
| aoqi@0 | 58 | function readAllBytes(file) { |
| aoqi@0 | 59 | return Files.readAllBytes(path(file)); |
| aoqi@0 | 60 | } |
| aoqi@0 | 61 | |
| aoqi@0 | 62 | // disassemble .class byte[] and prints output to stdout |
| aoqi@0 | 63 | function disassemble(bytecode) { |
| aoqi@0 | 64 | var pw = new PrintWriter(System.out); |
| aoqi@0 | 65 | new ClassReader(bytecode).accept(new TraceClassVisitor(pw), 0); |
| aoqi@0 | 66 | } |
| aoqi@0 | 67 | |
| aoqi@0 | 68 | // check for command line arg (for .class file name) |
| aoqi@0 | 69 | if (arguments.length == 0 || !arguments[0].endsWith('.class')) { |
| aoqi@0 | 70 | print("Usage: jjs disassemble -- <.class file>"); |
| aoqi@0 | 71 | exit(1); |
| aoqi@0 | 72 | } |
| aoqi@0 | 73 | |
| aoqi@0 | 74 | // disassemble the given .class file |
| aoqi@0 | 75 | disassemble(readAllBytes(arguments[0])); |
