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 */ 23 24/* 25 * @test 26 * @bug 8180141 27 * @summary Missing entry in LineNumberTable for break statement that jumps out of try-finally 28 * @modules jdk.jdeps/com.sun.tools.classfile 29 * jdk.compiler/com.sun.tools.javac.code 30 * jdk.compiler/com.sun.tools.javac.comp 31 * jdk.compiler/com.sun.tools.javac.file 32 * jdk.compiler/com.sun.tools.javac.main 33 * jdk.compiler/com.sun.tools.javac.tree 34 * jdk.compiler/com.sun.tools.javac.util 35 * @compile -g MissingLNTEntryForFinalizerTest.java 36 * @run main MissingLNTEntryForFinalizerTest 37 */ 38 39import java.io.File; 40import java.net.URI; 41 42import javax.tools.JavaFileObject; 43import javax.tools.SimpleJavaFileObject; 44 45import com.sun.tools.classfile.*; 46import com.sun.tools.javac.comp.Attr; 47import com.sun.tools.javac.comp.AttrContext; 48import com.sun.tools.javac.comp.Env; 49import com.sun.tools.javac.comp.Modules; 50import com.sun.tools.javac.file.JavacFileManager; 51import com.sun.tools.javac.main.JavaCompiler; 52import com.sun.tools.javac.tree.JCTree; 53import com.sun.tools.javac.tree.JCTree.*; 54import com.sun.tools.javac.util.Context; 55import com.sun.tools.javac.util.List; 56 57import static com.sun.tools.javac.util.List.of; 58import static com.sun.tools.javac.tree.JCTree.Tag.*; 59 60public class MissingLNTEntryForFinalizerTest { 61 protected ReusableJavaCompiler tool; 62 Context context; 63 64 MissingLNTEntryForFinalizerTest() { 65 context = new Context(); 66 JavacFileManager.preRegister(context); 67 MyAttr.preRegister(context); 68 tool = new ReusableJavaCompiler(context); 69 } 70 71 public static void main(String... args) throws Throwable { 72 new MissingLNTEntryForFinalizerTest().test(); 73 } 74 75 void test() throws Throwable { 76 JavaSource source = new JavaSource("1"); 77 tool.clear(); 78 List<JavaFileObject> inputs = of(source); 79 try { 80 tool.compile(inputs); 81 } catch (Throwable ex) { 82 throw new AssertionError(ex); 83 } 84 File testClasses = new File("."); 85 File file = new File(testClasses, "Test1.class"); 86 ClassFile classFile = ClassFile.read(file); 87 for (Method m : classFile.methods) { 88 if (classFile.constant_pool.getUTF8Value(m.name_index).equals("foo")) { 89 Code_attribute code = (Code_attribute)m.attributes.get(Attribute.Code); 90 LineNumberTable_attribute lnt = (LineNumberTable_attribute)code.attributes.get(Attribute.LineNumberTable); 91 checkLNT(lnt, MyAttr.lineNumber); 92 } 93 } 94 } 95 96 void checkLNT(LineNumberTable_attribute lnt, int lineToCheckFor) { 97 for (LineNumberTable_attribute.Entry e: lnt.line_number_table) { 98 if (e.line_number == lineToCheckFor) { 99 return; 100 } 101 } 102 throw new AssertionError("seek line number not found in the LNT for method foo()"); 103 } 104 105 class JavaSource extends SimpleJavaFileObject { 106 String id; 107 String template = 108 "import java.util.*;\n" + 109 "class Test#Id {\n" + 110 " void foo() {\n" + 111 " List<String> l = null;\n" + 112 " String first = null;\n" + 113 " try {\n" + 114 " first = l.get(0);\n" + 115 " } finally {\n" + 116 " if (first != null) {\n" + 117 " System.out.println(\"finalizer\");\n" + 118 " }\n" + 119 " }\n" + 120 " }\n" + 121 "}"; 122 123 JavaSource(String id) { 124 super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE); 125 this.id = id; 126 } 127 128 @Override 129 public CharSequence getCharContent(boolean ignoreEncodingErrors) { 130 return template.replace("#Id", id); 131 } 132 } 133 134 /* this class has been set up to do not depend on a fixed line number, this Attr subclass will 135 * look for 'break' or 'continue' statements in order to find the actual line number they occupy. 136 * This way the test can find if that line number appears in the LNT generated for a given class. 137 */ 138 static class MyAttr extends Attr { 139 static int lineNumber; 140 141 static void preRegister(Context context) { 142 context.put(attrKey, (com.sun.tools.javac.util.Context.Factory<Attr>) c -> new MyAttr(c)); 143 } 144 145 MyAttr(Context context) { 146 super(context); 147 } 148 149 @Override 150 public com.sun.tools.javac.code.Type attribStat(JCTree tree, Env<AttrContext> env) { 151 com.sun.tools.javac.code.Type result = super.attribStat(tree, env); 152 if (tree.hasTag(TRY)) { 153 JCTry tryTree = (JCTry)tree; 154 lineNumber = env.toplevel.lineMap.getLineNumber(tryTree.finalizer.endpos); 155 } 156 return result; 157 } 158 } 159 160 static class ReusableJavaCompiler extends JavaCompiler { 161 ReusableJavaCompiler(Context context) { 162 super(context); 163 } 164 165 @Override 166 protected void checkReusable() { 167 // do nothing 168 } 169 170 @Override 171 public void close() { 172 //do nothing 173 } 174 175 void clear() { 176 newRound(); 177 Modules.instance(context).newRound(); 178 } 179 } 180} 181