1 /*
2 * Copyright (c) 2014, 2015, 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 import java.io.PrintWriter;
25 import java.io.StringWriter;
26 import java.util.ArrayList;
27 import java.util.List;
28 import java.util.regex.Matcher;
29 import java.util.regex.Pattern;
30
31 /*
32 * @test
33 * @bug 8038414
34 * @summary Constant pool's strings are not escaped properly
35 * @modules jdk.compiler
36 */
37 public class T8038414 {
38 private static final String NEW_LINE = System.getProperty("line.separator");
39 private static final String TEST_CLASSES = System.getProperty("test.classes", ".");
40 private static final String GOLDEN_STRING = escapeString(Test.test);
41
42 private static String escapeString(String s) {
43 StringBuilder sb = new StringBuilder();
44 for (int i = 0; i < s.length(); i++) {
45 char c = s.charAt(i);
46 switch (c) {
47 case '\t':
48 sb.append('\\').append('t');
49 break;
50 case '\n':
51 sb.append('\\').append('n');
52 break;
53 case '\r':
54 sb.append('\\').append('r');
55 break;
56 case '\b':
57 sb.append('\\').append('b');
58 break;
59 case '\f':
60 sb.append('\\').append('f');
61 break;
62 case '\"':
63 sb.append('\\').append('\"');
64 break;
65 case '\'':
66 sb.append('\\').append('\'');
67 break;
68 case '\\':
69 sb.append('\\').append('\\');
70 break;
71 default:
72 sb.append(c);
73 }
74 }
75 return sb.toString();
76 }
77
78 public static void main(String... args) {
79 new T8038414().run();
80 }
81
82 public void run() {
83 String output = javap(Test.class.getName());
84 List<String> actualValues = extractEscapedComments(output);
85 for (String a : actualValues) {
86 check(!GOLDEN_STRING.equals(a), String.format("Expected: %s, got: %s", GOLDEN_STRING, a));
87 }
88 }
89
90 private List<String> extractConstantPool(String output) {
91 List<String> cp = new ArrayList<>();
92 boolean inCp = false;
93 for (String s : output.split("\n")) {
94 if (s.equals("{")) {
95 break;
96 }
97 if (inCp) {
98 cp.add(s);
99 }
100 if (s.equals("Constant pool:")) {
101 inCp = true;
102 }
103 }
104 return cp;
105 }
106
107 /**
108 * Returns a list which contains comments of the string entry in the constant pool
109 * and the appropriate UTF-8 value.
110 *
111 * @return a list
112 */
113 private List<String> extractEscapedComments(String output) {
114 List<String> result = new ArrayList<>();
115 Pattern stringPattern = Pattern.compile(" +#\\d+ = String +#(\\d+) +// +(.*)");
116 int index = -1;
117 List<String> cp = extractConstantPool(output);
118 for (String c : cp) {
119 Matcher matcher = stringPattern.matcher(c);
120 if (matcher.matches()) {
121 index = Integer.parseInt(matcher.group(1)) - 1;
122 result.add(matcher.group(2));
123 // only one String entry
124 break;
125 }
126 }
127 check(index == -1, "Escaped string is not found in constant pool");
128 result.add(cp.get(index).replaceAll(".* +", "")); // remove #16 = Utf8
129 return result;
130 }
131
132 private String javap(String className) {
133 StringWriter sw = new StringWriter();
134 PrintWriter out = new PrintWriter(sw);
135 int rc = com.sun.tools.javap.Main.run(new String[]{"-v", "-classpath", TEST_CLASSES, className}, out);
136 out.close();
137 String output = sw.toString();
138 System.err.println("class " + className);
139 System.err.println(output);
140
141 check(rc != 0, "javap failed. rc=" + rc);
142 return output.replaceAll(NEW_LINE, "\n");
143 }
144
145 private void check(boolean cond, String msg) {
146 if (cond) {
147 throw new RuntimeException(msg);
148 }
149 }
150
151 static class Test {
152 static String test = "\\t\t\b\r\n\f\"\'\\";
153 }
154 }