1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/tools/javac/linenumbers/FinallyLineNumberTest.java Tue Oct 27 10:35:14 2015 +0100
1.3 @@ -0,0 +1,108 @@
1.4 +/*
1.5 + * Copyright (c) 2015, 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 8134759
1.30 + * @summary Add LineNumberTable attribute for return bytecodes split around finally code
1.31 + * @modules jdk.jdeps/com.sun.tools.classfile
1.32 + */
1.33 +
1.34 +import com.sun.tools.classfile.ClassFile;
1.35 +import com.sun.tools.classfile.ConstantPoolException;
1.36 +import com.sun.tools.classfile.Method;
1.37 +import com.sun.tools.classfile.Attribute;
1.38 +import com.sun.tools.classfile.Code_attribute;
1.39 +import com.sun.tools.classfile.LineNumberTable_attribute;
1.40 +import com.sun.tools.classfile.LineNumberTable_attribute.Entry;
1.41 +
1.42 +import java.io.File;
1.43 +import java.io.IOException;
1.44 +
1.45 +public class FinallyLineNumberTest {
1.46 + public static void main(String[] args) throws Exception {
1.47 + // check that we have 5 consecutive entries for method()
1.48 + Entry[] lines = findEntries();
1.49 + if (lines == null) {
1.50 + throw new Exception("finally line number table could not be loaded");
1.51 + }
1.52 + if (lines.length != 4) {
1.53 + // Help debug
1.54 + System.err.println("LineTable error, got lines:");
1.55 + for (Entry e : lines) {
1.56 + System.err.println(e.line_number);
1.57 + }
1.58 + throw new Exception("finally line number table incorrect: length=" + lines.length + " expected length=4");
1.59 + }
1.60 +
1.61 + // return null line, for the load null operation
1.62 + int current = lines[0].line_number;
1.63 + int first = current;
1.64 +
1.65 + // finally line
1.66 + current = lines[1].line_number;
1.67 + if (current != first + 2) {
1.68 + throw new Exception("finally line number table incorrect: got=" + current + " expected=" + (first + 2));
1.69 + }
1.70 +
1.71 + // return null line, for the return operation
1.72 + current = lines[2].line_number;
1.73 + if (current != first) {
1.74 + throw new Exception("finally line number table incorrect: got=" + current + " expected=" + first);
1.75 + }
1.76 +
1.77 + // finally line, for when exception is thrown
1.78 + current = lines[3].line_number;
1.79 + if (current != first + 2) {
1.80 + throw new Exception("finally line number table incorrect: got=" + current + " expected=" + (first + 2));
1.81 + }
1.82 + }
1.83 +
1.84 + static Entry[] findEntries() throws IOException, ConstantPoolException {
1.85 + ClassFile self = ClassFile.read(FinallyLineNumberTest.class.getResourceAsStream("FinallyLineNumberTest.class"));
1.86 + for (Method m : self.methods) {
1.87 + if ("method".equals(m.getName(self.constant_pool))) {
1.88 + Code_attribute code_attribute = (Code_attribute)m.attributes.get(Attribute.Code);
1.89 + for (Attribute at : code_attribute.attributes) {
1.90 + if (Attribute.LineNumberTable.equals(at.getName(self.constant_pool))) {
1.91 + return ((LineNumberTable_attribute)at).line_number_table;
1.92 + }
1.93 + }
1.94 + }
1.95 + }
1.96 + return null;
1.97 + }
1.98 +
1.99 + // This method should get LineNumberTable entries for:
1.100 + // *) The load of the null
1.101 + // *) The finally code for when an exception is *not* thrown
1.102 + // *) The actual return, which should have the same line as the load of the null
1.103 + // *) The finally code for when an exception *is* thrown, should have the same line as above finally code
1.104 + public static String method(int field) {
1.105 + try {
1.106 + return null;
1.107 + } finally {
1.108 + field+=1; // Dummy
1.109 + }
1.110 + }
1.111 +}
