nashorn/samples/findproto.js
author sgehwolf
Fri, 27 Mar 2015 16:12:40 +0100
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permissions -rw-r--r--
8076181: bytecodeInterpreter.cpp refers to unknown labels. Reviewed-by: coleenp, dholmes
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/*
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 * Copyright (c) 2015, 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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 *
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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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 *
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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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// __proto__ magic property is non-standard. Use Object.getPrototypeOf
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// and Object.setPrototypeOf instead. This script finds __proto__
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// usage in scripts a given directory (recursively). If no directory 
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// is specified the current working directory is scanned for scripts.
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if (arguments.length == 0) {
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    arguments[0] = ".";
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}
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var File = Java.type("java.io.File");
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var file = new File(arguments[0]);
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if (!file.exists()) {
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    print(arguments[0] + " is neither a file nor a directory");
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    exit(1);
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}
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var Files = Java.type("java.nio.file.Files");
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var Parser = Java.type("jdk.nashorn.api.tree.Parser");
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var SimpleTreeVisitor = Java.type("jdk.nashorn.api.tree.SimpleTreeVisitorES5_1");
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var parser = Parser.create("-scripting", "--const-as-var");
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var protoFound = false;
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function checkFile(file) {
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    // print("checking " + file);
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    var ast = parser.parse(file, print);
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    if (!ast) {
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        return;
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    }
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    // locate __proto__ usage and warn
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    ast.accept(visitor = new (Java.extend(SimpleTreeVisitor)) {
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        lineMap: null,
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        printWarning: function(node) {
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            var pos = node.startPosition;
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            var line = this.lineMap.getLineNumber(pos);
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            var column = this.lineMap.getColumnNumber(pos);
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            print("WARNING: __proto__ usage in " + file + " @ " + line + ":" + column);
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        },
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        checkProto: function(node, name) {
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            if (name == "__proto__") {
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                protoFound = true;
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                this.printWarning(node);
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            }
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        },
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        visitCompilationUnit: function(node, extra) {
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            this.lineMap = node.lineMap;
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            Java.super(visitor).visitCompilationUnit(node, extra);
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        },
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        visitIdentifier: function(node, extra) {
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            this.checkProto(node, node.name);
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            Java.super(visitor).visitIdentifier(node, extra);
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        },
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        visitMemberSelect: function(node, extra) {
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            this.checkProto(node, node.identifier);
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            Java.super(visitor).visitMemberSelect(node, extra);
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        },
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        visitProperty: function(node, extra) {
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            this.checkProto(node, node.key);
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            Java.super(visitor).visitProperty(node, extra);
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        }
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    }, null);
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}
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if (file.isDirectory()) {
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    Files.walk(file.toPath())
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        .filter(function(p) Files.isRegularFile(p))
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        .filter(function(p) p.toFile().name.endsWith('.js'))
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        .forEach(checkFile);
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} else {
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    checkFile(file);
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}
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if (protoFound) {
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    print("__proto__ is non-standard. Use Object.get/setPrototypeOf instead");
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}