NASHORN-653.js revision 877:cf4d2252d444 
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
31var script = "   \
32function a() {   \
33    return true; \
34}                \
35                 \
36function b() {   \
37    while (x) {      \
38    return true; \
39    }                \
40}                    \
41                     \
42function c() {       \
43    while (true) {   \
44    return true; \
45    }                \
46 }                   \
47                     \
48function d() {       \
49    do {             \
50    return true; \
51    } while (x);     \
52} \
53\
54function f() {       \
55    for (;;) {       \
56    return true; \
57    } \
58} \
59\
60function e() { \
61    for (;;) { \
62    return true; \
63    } \
64} \
65\
66function g() { \
67    for(;;) { \
68    print('goes on and on and on ... '); \
69    } \
70    print('x'); \
71} \
72";
73
74function 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 engine = fac.getScriptEngine(Java.to(opts, "java.lang.String[]"));
89            engine.eval(code);
90            newErr.flush();
91            return new java.lang.String(baos.toByteArray());
92        } finally {
93            // restore System.err to old value
94            System.setErr(oldErr);
95        }
96    }
97}
98
99var result = runScriptEngine([ "--print-code" ], script);
100
101if (result.indexOf("NOP") != -1) {
102    fail("ASM genenerates NOP*/ATHROW sequences - dead code is still in the script");
103}
104