MissingLNTEntryForBreakContinueTest.java revision 4164:f1b537d595e8
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 MissingLNTEntryForBreakContinueTest.java 36 * @run main MissingLNTEntryForBreakContinueTest 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.util.Context; 54import com.sun.tools.javac.util.List; 55 56import static com.sun.tools.javac.util.List.of; 57import static com.sun.tools.javac.tree.JCTree.Tag.*; 58 59public class MissingLNTEntryForBreakContinueTest { 60 protected ReusableJavaCompiler tool; 61 Context context; 62 63 MissingLNTEntryForBreakContinueTest() { 64 context = new Context(); 65 JavacFileManager.preRegister(context); 66 MyAttr.preRegister(context); 67 tool = new ReusableJavaCompiler(context); 68 } 69 70 public static void main(String... args) throws Throwable { 71 new MissingLNTEntryForBreakContinueTest().test(); 72 } 73 74 void test() throws Throwable { 75 testFor("1", "break"); 76 testFor("2", "continue"); 77 } 78 79 void testFor(String id, String statement) throws Throwable { 80 JavaSource source = new JavaSource(id, statement); 81 tool.clear(); 82 List<JavaFileObject> inputs = of(source); 83 try { 84 tool.compile(inputs); 85 } catch (Throwable ex) { 86 throw new AssertionError(ex); 87 } 88 File testClasses = new File("."); 89 File file = new File(testClasses, "Test" + id + ".class"); 90 ClassFile classFile = ClassFile.read(file); 91 for (Method m : classFile.methods) { 92 if (classFile.constant_pool.getUTF8Value(m.name_index).equals("foo")) { 93 Code_attribute code = (Code_attribute)m.attributes.get(Attribute.Code); 94 LineNumberTable_attribute lnt = (LineNumberTable_attribute)code.attributes.get(Attribute.LineNumberTable); 95 checkLNT(lnt, MyAttr.lineNumber); 96 } 97 } 98 } 99 100 void checkLNT(LineNumberTable_attribute lnt, int lineToCheckFor) { 101 for (LineNumberTable_attribute.Entry e: lnt.line_number_table) { 102 if (e.line_number == lineToCheckFor) { 103 return; 104 } 105 } 106 throw new AssertionError("seek line number not found in the LNT for method foo()"); 107 } 108 109 class JavaSource extends SimpleJavaFileObject { 110 String statement; 111 String id; 112 String template = 113 "class Test#Id {\n" + 114 " void foo(boolean condition) {\n" + 115 " while (true) {\n" + 116 " try {\n" + 117 " if (condition) {\n" + 118 " #STM;\n" + 119 " }\n" + 120 " } finally {\n" + 121 " System.out.println(\"finalizer\");\n" + 122 " }\n" + 123 " }\n" + 124 " }" + 125 "}"; 126 127 JavaSource(String id, String statement) { 128 super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE); 129 this.statement = statement; 130 this.id = id; 131 } 132 133 @Override 134 public CharSequence getCharContent(boolean ignoreEncodingErrors) { 135 return template.replace("#Id", id).replace("#STM", statement); 136 } 137 } 138 139 /* this class has been set up to do not depend on a fixed line number, this Attr subclass will 140 * look for 'break' or 'continue' statements in order to find the actual line number they occupy. 141 * This way the test can find if that line number appears in the LNT generated for a given class. 142 */ 143 static class MyAttr extends Attr { 144 static int lineNumber; 145 146 static void preRegister(Context context) { 147 context.put(attrKey, (com.sun.tools.javac.util.Context.Factory<Attr>) c -> new MyAttr(c)); 148 } 149 150 MyAttr(Context context) { 151 super(context); 152 } 153 154 @Override 155 public com.sun.tools.javac.code.Type attribStat(JCTree tree, Env<AttrContext> env) { 156 com.sun.tools.javac.code.Type result = super.attribStat(tree, env); 157 if (tree.hasTag(BREAK) || tree.hasTag(CONTINUE)) { 158 lineNumber = env.toplevel.lineMap.getLineNumber(tree.pos); 159 } 160 return result; 161 } 162 } 163 164 static class ReusableJavaCompiler extends JavaCompiler { 165 ReusableJavaCompiler(Context context) { 166 super(context); 167 } 168 169 @Override 170 protected void checkReusable() { 171 // do nothing 172 } 173 174 @Override 175 public void close() { 176 //do nothing 177 } 178 179 void clear() { 180 newRound(); 181 Modules.instance(context).newRound(); 182 } 183 } 184} 185