8061778: Wrong LineNumberTable for default constructors
Summary: Synthetic empty blocks generated by Lower are erroneously picked up by Gen
Reviewed-by: jjg
--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Lower.java Thu Oct 23 13:43:56 2014 -0700
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Lower.java Fri Oct 24 10:54:04 2014 +0100
@@ -2468,7 +2468,7 @@
currentMethodSym = currentMethodSymPrev;
// Return empty block {} as a placeholder for an inner class.
- result = make_at(tree.pos()).Block(0, List.<JCStatement>nil());
+ result = make_at(tree.pos()).Block(SYNTHETIC, List.<JCStatement>nil());
}
/** Translate an enum class. */
--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Gen.java Thu Oct 23 13:43:56 2014 -0700
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Gen.java Fri Oct 24 10:54:04 2014 +0100
@@ -447,7 +447,7 @@
JCBlock block = (JCBlock)def;
if ((block.flags & STATIC) != 0)
clinitCode.append(block);
- else
+ else if ((block.flags & SYNTHETIC) == 0)
initCode.append(block);
break;
case METHODDEF:
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/linenumbers/NestedLineNumberTest.java Fri Oct 24 10:54:04 2014 +0100
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2014, 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. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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 8061778
+ * @summary Wrong LineNumberTable for default constructors
+ */
+
+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 NestedLineNumberTest {
+
+ public static void main(String[] args) throws Exception {
+ Entry[] lines = findEntries();
+ if (lines == null || lines.length != 1) {
+ int found = lines == null ? 0 : lines.length;
+ error(String.format("LineNumberTable contains wrong number of entries - expected %d, found %d", 1, found));
+ }
+
+ int line = lines[0].line_number;
+ if (line != 78) {
+ error(String.format("LineNumberTable contains wrong line number - expected %d, found %d", 78, line));
+ }
+ }
+
+ static Entry[] findEntries() throws IOException, ConstantPoolException {
+ ClassFile self = ClassFile.read(NestedLineNumberTest.Test.class.getResourceAsStream("NestedLineNumberTest$Test.class"));
+ for (Method m : self.methods) {
+ if ("<init>".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;
+ }
+
+ static void error(String msg) {
+ throw new AssertionError(msg);
+ }
+
+ // The default constructor in this class should get only one LineNumberTable entry,
+ // pointing to the first line of the declaration of class Test.
+ static class Test {
+ static class Empty { }
+ }
+}