changeset 3650:6e028413ea08

8160699: java.lang.VerifyError: Inconsistent stackmap frames at branch target Summary: Ensure out of scope locals are not treated as being alive Reviewed-by: mcimadamore
author sadayapalam
date Wed, 14 Sep 2016 20:00:20 +0530
parents 31c022a17639
children 013e3e406ddf
files src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Gen.java test/tools/javac/SwitchExitStateTest.java
diffstat 2 files changed, 50 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Gen.java	Tue Sep 13 19:32:03 2016 +0530
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Gen.java	Wed Sep 14 20:00:20 2016 +0530
@@ -1232,7 +1232,7 @@
             Chain exit = switchEnv.info.exit;
             if  (exit != null) {
                 code.resolve(exit);
-                exit.state.defined.excludeFrom(code.nextreg);
+                exit.state.defined.excludeFrom(limit);
             }
 
             // If we have not set the default offset, we do so now.
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/tools/javac/SwitchExitStateTest.java	Wed Sep 14 20:00:20 2016 +0530
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2016, 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 8160699
+ * @summary Verify that having finished executing a switch statement live locals are exactly the same as it was upon entry of the switch.
+ * @run main SwitchExitStateTest
+ */
+
+public class SwitchExitStateTest {
+    public static void main(String[] args) throws Exception {
+        switch (0) {
+        case 0:
+            String a = "";
+            break;
+        default:
+            throw new Exception("Unknown ");
+        }
+
+        switch (0) {
+        case 0:
+            String b = "";
+            break;
+        default:
+            throw new Exception("Unknown ");
+        }
+    }
+}
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