8036100: Default method returns true for a while, and then returns false

Reviewed-by: kvn, jrose

hotspot/src/share/vm/ci/ciMethod.cpp

@@ -724,6 +724,11 @@ ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller,
 
   VM_ENTRY_MARK;
 
+  // Disable CHA for default methods for now
+  if (root_m->get_Method()->is_default_method()) {
+    return NULL;
+  }
+
   methodHandle target;
   {
     MutexLocker locker(Compile_lock);

hotspot/test/compiler/inlining/InlineDefaultMethod1.java

@@ -0,0 +1,58 @@
+/*
+ * 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.
+ *
+ * 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 8036100
+ * @summary Default method returns true for a while, and then returns false
+ * @run main/othervm -Xcomp -XX:CompileOnly=InlineDefaultMethod1::test
+ *                   -XX:CompileOnly=I1::m -XX:CompileOnly=I2::m
+ *                   InlineDefaultMethod1
+ */
+interface I1 {
+    default public int m() { return 0; }
+}
+
+interface I2 extends I1 {
+    default public int m() { return 1; }
+}
+
+abstract class A implements I1 {
+}
+
+class B extends A implements I2 {
+}
+
+public class InlineDefaultMethod1 {
+    public static void test(A obj) {
+        int id = obj.m();
+        if (id != 1) {
+            throw new AssertionError("Called wrong method: 1 != "+id);
+        }
+    }
+
+    public static void main(String[] args) throws InterruptedException {
+        test(new B());
+        System.out.println("TEST PASSED");
+    }
+}