1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/tools/javac/T8180660/MissingLNTEntryForFinalizerTest.java Wed Jun 07 00:04:12 2017 -0700
1.3 @@ -0,0 +1,170 @@
1.4 +/*
1.5 + * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + */
1.26 +
1.27 +/*
1.28 + * @test
1.29 + * @bug 8180141
1.30 + * @summary Missing entry in LineNumberTable for break statement that jumps out of try-finally
1.31 + * @compile -g MissingLNTEntryForFinalizerTest.java
1.32 + * @run main MissingLNTEntryForFinalizerTest
1.33 + */
1.34 +
1.35 +import java.io.File;
1.36 +import java.net.URI;
1.37 +
1.38 +import javax.tools.JavaFileObject;
1.39 +import javax.tools.SimpleJavaFileObject;
1.40 +
1.41 +import com.sun.tools.classfile.*;
1.42 +import com.sun.tools.javac.comp.Attr;
1.43 +import com.sun.tools.javac.comp.AttrContext;
1.44 +import com.sun.tools.javac.comp.Env;
1.45 +import com.sun.tools.javac.file.JavacFileManager;
1.46 +import com.sun.tools.javac.main.JavaCompiler;
1.47 +import com.sun.tools.javac.tree.JCTree;
1.48 +import com.sun.tools.javac.tree.JCTree.*;
1.49 +import com.sun.tools.javac.util.Context;
1.50 +import com.sun.tools.javac.util.List;
1.51 +
1.52 +import static com.sun.tools.javac.util.List.of;
1.53 +import static com.sun.tools.javac.tree.JCTree.Tag.*;
1.54 +
1.55 +public class MissingLNTEntryForFinalizerTest {
1.56 + protected ReusableJavaCompiler tool;
1.57 + Context context;
1.58 +
1.59 + MissingLNTEntryForFinalizerTest() {
1.60 + context = new Context();
1.61 + JavacFileManager.preRegister(context);
1.62 + MyAttr.preRegister(context);
1.63 + tool = new ReusableJavaCompiler(context);
1.64 + }
1.65 +
1.66 + public static void main(String... args) throws Throwable {
1.67 + new MissingLNTEntryForFinalizerTest().test();
1.68 + }
1.69 +
1.70 + void test() throws Throwable {
1.71 + JavaSource source = new JavaSource("1");
1.72 + tool.clear();
1.73 + List<JavaFileObject> inputs = of(source);
1.74 + try {
1.75 + tool.compile(inputs);
1.76 + } catch (Throwable ex) {
1.77 + throw new AssertionError(ex);
1.78 + }
1.79 + File testClasses = new File(".");
1.80 + File file = new File(testClasses, "Test1.class");
1.81 + ClassFile classFile = ClassFile.read(file);
1.82 + for (Method m : classFile.methods) {
1.83 + if (classFile.constant_pool.getUTF8Value(m.name_index).equals("foo")) {
1.84 + Code_attribute code = (Code_attribute)m.attributes.get(Attribute.Code);
1.85 + LineNumberTable_attribute lnt = (LineNumberTable_attribute)code.attributes.get(Attribute.LineNumberTable);
1.86 + checkLNT(lnt, MyAttr.lineNumber);
1.87 + }
1.88 + }
1.89 + }
1.90 +
1.91 + void checkLNT(LineNumberTable_attribute lnt, int lineToCheckFor) {
1.92 + for (LineNumberTable_attribute.Entry e: lnt.line_number_table) {
1.93 + if (e.line_number == lineToCheckFor) {
1.94 + return;
1.95 + }
1.96 + }
1.97 + throw new AssertionError("seek line number not found in the LNT for method foo()");
1.98 + }
1.99 +
1.100 + class JavaSource extends SimpleJavaFileObject {
1.101 + String id;
1.102 + String template =
1.103 + "import java.util.*;\n" +
1.104 + "class Test#Id {\n" +
1.105 + " void foo() {\n" +
1.106 + " List<String> l = null;\n" +
1.107 + " String first = null;\n" +
1.108 + " try {\n" +
1.109 + " first = l.get(0);\n" +
1.110 + " } finally {\n" +
1.111 + " if (first != null) {\n" +
1.112 + " System.out.println(\"finalizer\");\n" +
1.113 + " }\n" +
1.114 + " }\n" +
1.115 + " }\n" +
1.116 + "}";
1.117 +
1.118 + JavaSource(String id) {
1.119 + super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
1.120 + this.id = id;
1.121 + }
1.122 +
1.123 + @Override
1.124 + public CharSequence getCharContent(boolean ignoreEncodingErrors) {
1.125 + return template.replace("#Id", id);
1.126 + }
1.127 + }
1.128 +
1.129 + /* this class has been set up to do not depend on a fixed line number, this Attr subclass will
1.130 + * look for 'break' or 'continue' statements in order to find the actual line number they occupy.
1.131 + * This way the test can find if that line number appears in the LNT generated for a given class.
1.132 + */
1.133 + static class MyAttr extends Attr {
1.134 + static int lineNumber;
1.135 +
1.136 + static void preRegister(Context context) {
1.137 + context.put(attrKey, (com.sun.tools.javac.util.Context.Factory<Attr>) c -> new MyAttr(c));
1.138 + }
1.139 +
1.140 + MyAttr(Context context) {
1.141 + super(context);
1.142 + }
1.143 +
1.144 + @Override
1.145 + public com.sun.tools.javac.code.Type attribStat(JCTree tree, Env<AttrContext> env) {
1.146 + com.sun.tools.javac.code.Type result = super.attribStat(tree, env);
1.147 + if (tree.hasTag(TRY)) {
1.148 + JCTry tryTree = (JCTry)tree;
1.149 + lineNumber = env.toplevel.lineMap.getLineNumber(tryTree.finalizer.endpos);
1.150 + }
1.151 + return result;
1.152 + }
1.153 + }
1.154 +
1.155 + static class ReusableJavaCompiler extends JavaCompiler {
1.156 + ReusableJavaCompiler(Context context) {
1.157 + super(context);
1.158 + }
1.159 +
1.160 + protected void checkReusable() {
1.161 + // do nothing
1.162 + }
1.163 +
1.164 + @Override
1.165 + public void close() {
1.166 + //do nothing
1.167 + }
1.168 +
1.169 + void clear() {
1.170 + //do nothing
1.171 + }
1.172 + }
1.173 +}
