1 /*

     2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions

     6  * are met:

     7  *

     8  *   - Redistributions of source code must retain the above copyright

     9  *     notice, this list of conditions and the following disclaimer.

    10  *

    11  *   - Redistributions in binary form must reproduce the above copyright

    12  *     notice, this list of conditions and the following disclaimer in the

    13  *     documentation and/or other materials provided with the distribution.

    14  *

    15  *   - Neither the name of Oracle nor the names of its

    16  *     contributors may be used to endorse or promote products derived

    17  *     from this software without specific prior written permission.

    18  *

    19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS

    20  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

    21  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR

    23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    26  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

    27  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

    28  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

    29  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    30  */

    31 

    32 // Find break or continue inside try..finally in all scripts

    33 // in a given directory (recursively). If no directory is specified

    34 // the current working directory is scanned for scripts.

    35 

    36 if (arguments.length == 0) {

    37     arguments[0] = ".";

    38 }

    39 

    40 var File = Java.type("java.io.File");

    41 var file = new File(arguments[0]);

    42 if (!file.exists()) {

    43     print(arguments[0] + " is neither a directory nor a file");

    44     exit(1);

    45 }

    46 

    47 var Files = Java.type("java.nio.file.Files");

    48 var Parser = Java.type("jdk.nashorn.api.tree.Parser");

    49 var SimpleTreeVisitor = Java.type("jdk.nashorn.api.tree.SimpleTreeVisitorES5_1");

    50 

    51 var parser = Parser.create("-scripting", "--const-as-var");

    52 

    53 function checkFile(file) {

    54     // print("checking " + file);

    55     var ast = parser.parse(file, print);

    56     if (!ast) {

    57         return;

    58     }

    59 

    60     // locate 'break/continue' inside try..finally

    61     ast.accept(visitor = new (Java.extend(SimpleTreeVisitor)) {

    62         lineMap: null,

    63         inTryFinally: false,

    64 

    65         printWarning: function(node, msg) {

    66             var pos = node.startPosition;

    67             var line = this.lineMap.getLineNumber(pos);

    68             var column = this.lineMap.getColumnNumber(pos);

    69             print(msg + " found in " + file + " @ " + line + ":" + column);

    70         },

    71 

    72         visitBreak: function(node, extra) {

    73             if (this.inTryFinally) {

    74                 this.printWarning(node, "break");

    75             }

    76         },

    77 

    78         visitContinue: function(node, extra) {

    79             if (this.inTryFinally) {

    80                 this.printWarning(node, "continue");

    81             }

    82         },

    83 

    84         visitCompilationUnit: function(node, extra) {

    85             this.lineMap = node.lineMap;

    86             Java.super(visitor).visitCompilationUnit(node, extra);

    87         },

    88 

    89         visitFunctionDeclaration: function(node, extra) {

    90             var oldInTryFinally = this.inTryFinally;

    91             this.inTryFinally = false;

    92             try {

    93                 Java.super(visitor).visitFunctionDeclaration(node, extra);

    94             } finally {

    95                 this.inTryFinally = oldInTryFinally;

    96             }

    97         },

    98 

    99         visitFunctionExpression: function(node, extra) {

   100             var oldInTryFinally = this.inTryFinally;

   101             this.inTryFinally = false;

   102             try {

   103                 Java.super(visitor).visitFunctionExpression(node, extra);

   104             } finally {

   105                 this.inTryFinally = oldInTryFinally;

   106             }

   107         },

   108 

   109         visitTry: function(node, extra) {

   110             var oldInTryFinally = this.inTryFinally;

   111             this.inTryFinally = (node.finallyBlock != null);

   112             try {

   113                 Java.super(visitor).visitTry(node, extra);

   114             } finally {

   115                 this.inTryFinally = oldInTryFinally;

   116             }

   117         }

   118     }, null);

   119 }

   120 

   121 

   122 if (file.isDirectory()) {

   123     Files.walk(file.toPath())

   124         .filter(function(p) Files.isRegularFile(p))

   125         .filter(function(p) p.toFile().name.endsWith('.js'))

   126         .forEach(checkFile);

   127 } else {

   128     checkFile(file);

   129 }