1 /*

     2  * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  * 

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  * 

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  * 

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  * 

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /**

    25  * NASHORN-653 : Various problems with isTerminal and dead code generation from ASM

    26  *

    27  * @test

    28  * @run

    29  */

    30 

    31 var script = "   \

    32 function a() {   \

    33     return true; \

    34 }                \

    35                  \

    36 function b() {   \

    37     while (x) {      \

    38 	return true; \

    39     }                \

    40 }                    \

    41                      \

    42 function c() {       \

    43     while (true) {   \

    44 	return true; \

    45     }                \

    46  }                   \

    47                      \

    48 function d() {       \

    49     do {             \

    50 	return true; \

    51     } while (x);     \

    52 } \

    53 \

    54 function f() {       \

    55     for (;;) {       \

    56 	return true; \

    57     } \

    58 } \

    59 \

    60 function e() { \

    61     for (;;) { \

    62 	return true; \

    63     } \

    64 } \

    65 \

    66 function g() { \

    67     for(;;) { \

    68 	print('goes on and on and on ... '); \

    69     } \

    70     print('x'); \

    71 } \

    72 ";

    73 

    74 function runScriptEngine(opts, code) {

    75     var imports = new JavaImporter(

    76         Packages.jdk.nashorn.api.scripting,

    77         java.io, java.lang, java.util);

    78 

    79     with(imports) {

    80         var fac = new NashornScriptEngineFactory();

    81         // get current System.err

    82         var oldErr = System.err;

    83         var baos = new ByteArrayOutputStream();

    84         var newErr = new PrintStream(baos);

    85         try {

    86             // set new standard err

    87             System.setErr(newErr);

    88             var strType = Java.type("java.lang.String");

    89             var engine = fac.getScriptEngine(Java.toJavaArray(opts, strType));

    90             engine.eval(code);

    91             newErr.flush();

    92             return new java.lang.String(baos.toByteArray());

    93         } finally {

    94             // restore System.err to old value

    95             System.setErr(oldErr);

    96         }

    97     }

    98 }

    99 

   100 var result = runScriptEngine([ "--print-code" ], script);

   101 

   102 if (result.indexOf("NOP") != -1) {

   103     fail("ASM genenerates NOP*/ATHROW sequences - dead code is still in the script");

   104 }