Sat, 22 Dec 2018 13:10:38 -0800
Added tag jdk8u202-b25 for changeset 15d8c732039b
1 /*
2 * Copyright (c) 2017, 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 */
24 /*
25 * @test
26 * @bug 8180141
27 * @summary Missing entry in LineNumberTable for break statement that jumps out of try-finally
28 * @compile -g MissingLNTEntryForFinalizerTest.java
29 * @run main MissingLNTEntryForFinalizerTest
30 */
32 import java.io.File;
33 import java.net.URI;
35 import javax.tools.JavaFileObject;
36 import javax.tools.SimpleJavaFileObject;
38 import com.sun.tools.classfile.*;
39 import com.sun.tools.javac.comp.Attr;
40 import com.sun.tools.javac.comp.AttrContext;
41 import com.sun.tools.javac.comp.Env;
42 import com.sun.tools.javac.file.JavacFileManager;
43 import com.sun.tools.javac.main.JavaCompiler;
44 import com.sun.tools.javac.tree.JCTree;
45 import com.sun.tools.javac.tree.JCTree.*;
46 import com.sun.tools.javac.util.Context;
47 import com.sun.tools.javac.util.List;
49 import static com.sun.tools.javac.util.List.of;
50 import static com.sun.tools.javac.tree.JCTree.Tag.*;
52 public class MissingLNTEntryForFinalizerTest {
53 protected ReusableJavaCompiler tool;
54 Context context;
56 MissingLNTEntryForFinalizerTest() {
57 context = new Context();
58 JavacFileManager.preRegister(context);
59 MyAttr.preRegister(context);
60 tool = new ReusableJavaCompiler(context);
61 }
63 public static void main(String... args) throws Throwable {
64 new MissingLNTEntryForFinalizerTest().test();
65 }
67 void test() throws Throwable {
68 JavaSource source = new JavaSource("1");
69 tool.clear();
70 List<JavaFileObject> inputs = of(source);
71 try {
72 tool.compile(inputs);
73 } catch (Throwable ex) {
74 throw new AssertionError(ex);
75 }
76 File testClasses = new File(".");
77 File file = new File(testClasses, "Test1.class");
78 ClassFile classFile = ClassFile.read(file);
79 for (Method m : classFile.methods) {
80 if (classFile.constant_pool.getUTF8Value(m.name_index).equals("foo")) {
81 Code_attribute code = (Code_attribute)m.attributes.get(Attribute.Code);
82 LineNumberTable_attribute lnt = (LineNumberTable_attribute)code.attributes.get(Attribute.LineNumberTable);
83 checkLNT(lnt, MyAttr.lineNumber);
84 }
85 }
86 }
88 void checkLNT(LineNumberTable_attribute lnt, int lineToCheckFor) {
89 for (LineNumberTable_attribute.Entry e: lnt.line_number_table) {
90 if (e.line_number == lineToCheckFor) {
91 return;
92 }
93 }
94 throw new AssertionError("seek line number not found in the LNT for method foo()");
95 }
97 class JavaSource extends SimpleJavaFileObject {
98 String id;
99 String template =
100 "import java.util.*;\n" +
101 "class Test#Id {\n" +
102 " void foo() {\n" +
103 " List<String> l = null;\n" +
104 " String first = null;\n" +
105 " try {\n" +
106 " first = l.get(0);\n" +
107 " } finally {\n" +
108 " if (first != null) {\n" +
109 " System.out.println(\"finalizer\");\n" +
110 " }\n" +
111 " }\n" +
112 " }\n" +
113 "}";
115 JavaSource(String id) {
116 super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
117 this.id = id;
118 }
120 @Override
121 public CharSequence getCharContent(boolean ignoreEncodingErrors) {
122 return template.replace("#Id", id);
123 }
124 }
126 /* this class has been set up to do not depend on a fixed line number, this Attr subclass will
127 * look for 'break' or 'continue' statements in order to find the actual line number they occupy.
128 * This way the test can find if that line number appears in the LNT generated for a given class.
129 */
130 static class MyAttr extends Attr {
131 static int lineNumber;
133 static void preRegister(Context context) {
134 context.put(attrKey, (com.sun.tools.javac.util.Context.Factory<Attr>) c -> new MyAttr(c));
135 }
137 MyAttr(Context context) {
138 super(context);
139 }
141 @Override
142 public com.sun.tools.javac.code.Type attribStat(JCTree tree, Env<AttrContext> env) {
143 com.sun.tools.javac.code.Type result = super.attribStat(tree, env);
144 if (tree.hasTag(TRY)) {
145 JCTry tryTree = (JCTry)tree;
146 lineNumber = env.toplevel.lineMap.getLineNumber(tryTree.finalizer.endpos);
147 }
148 return result;
149 }
150 }
152 static class ReusableJavaCompiler extends JavaCompiler {
153 ReusableJavaCompiler(Context context) {
154 super(context);
155 }
157 protected void checkReusable() {
158 // do nothing
159 }
161 @Override
162 public void close() {
163 //do nothing
164 }
166 void clear() {
167 //do nothing
168 }
169 }
170 }