| /* |
| * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 8134759 |
| * @summary Add LineNumberTable attribute for return bytecodes split around finally code |
| * @modules jdk.jdeps/com.sun.tools.classfile |
| */ |
| |
| import com.sun.tools.classfile.ClassFile; |
| import com.sun.tools.classfile.ConstantPoolException; |
| import com.sun.tools.classfile.Method; |
| import com.sun.tools.classfile.Attribute; |
| import com.sun.tools.classfile.Code_attribute; |
| import com.sun.tools.classfile.LineNumberTable_attribute; |
| import com.sun.tools.classfile.LineNumberTable_attribute.Entry; |
| |
| import java.io.IOException; |
| |
| public class FinallyLineNumberTest { |
| public static void main(String[] args) throws Exception { |
| // check that we have 5 consecutive entries for method() |
| Entry[] lines = findEntries(); |
| if (lines == null) { |
| throw new Exception("finally line number table could not be loaded"); |
| } |
| if (lines.length != 5) { |
| // Help debug |
| System.err.println("LineTable error, got lines:"); |
| for (Entry e : lines) { |
| System.err.println(e.line_number); |
| } |
| throw new Exception("finally line number table incorrect: length=" + lines.length + " expected length=5"); |
| } |
| |
| // return null line, for the load null operation |
| int current = lines[0].line_number; |
| int first = current; |
| |
| // finally line |
| current = lines[1].line_number; |
| if (current != first + 2) { |
| throw new Exception("finally line number table incorrect: got=" + current + " expected=" + (first + 2)); |
| } |
| |
| // return null line, for the return operation |
| current = lines[2].line_number; |
| if (current != first) { |
| throw new Exception("finally line number table incorrect: got=" + current + " expected=" + first); |
| } |
| |
| // for when exception is thrown |
| current = lines[3].line_number; |
| if (current != first + 2) { |
| throw new Exception("finally line number table incorrect: got=" + current + " expected=" + (first + 2)); |
| } |
| |
| // the '}' closing the finally block |
| current = lines[4].line_number; |
| if (current != first + 3) { |
| throw new Exception("finally line number table incorrect: got=" + current + " expected=" + (first + 3)); |
| } |
| } |
| |
| static Entry[] findEntries() throws IOException, ConstantPoolException { |
| ClassFile self = ClassFile.read(FinallyLineNumberTest.class.getResourceAsStream("FinallyLineNumberTest.class")); |
| for (Method m : self.methods) { |
| if ("method".equals(m.getName(self.constant_pool))) { |
| Code_attribute code_attribute = (Code_attribute)m.attributes.get(Attribute.Code); |
| for (Attribute at : code_attribute.attributes) { |
| if (Attribute.LineNumberTable.equals(at.getName(self.constant_pool))) { |
| return ((LineNumberTable_attribute)at).line_number_table; |
| } |
| } |
| } |
| } |
| return null; |
| } |
| |
| // This method should get LineNumberTable entries for: |
| // *) The load of the null |
| // *) The finally code for when an exception is *not* thrown |
| // *) The actual return, which should have the same line as the load of the null |
| // *) The finally code for when an exception *is* thrown, should have the same line as above finally code |
| public static String method(int field) { |
| try { |
| return null; |
| } finally { |
| field+=1; // Dummy |
| } |
| } |
| } |