8162477: [JVMCI] assert(wf.check_method_context(ctxk, m)) failed: proper context

Reviewed-by: kvn

hotspot/src/share/vm/code/dependencies.cpp

@@ -1082,11 +1082,10 @@ class ClassHierarchyWalker {
     if (!(m->is_public() || m->is_protected()))
       // The override story is complex when packages get involved.
       return true;  // Must punt the assertion to true.
-    Klass* k = ctxk;
+    Method* lm = ctxk->lookup_method(m->name(), m->signature());
-    Method* lm = k->lookup_method(m->name(), m->signature());
+    if (lm == NULL && ctxk->is_instance_klass()) {
-    if (lm == NULL && k->is_instance_klass()) {
       // It might be an interface method
-      lm = InstanceKlass::cast(k)->lookup_method_in_ordered_interfaces(m->name(),
+      lm = InstanceKlass::cast(ctxk)->lookup_method_in_ordered_interfaces(m->name(),
                                                                           m->signature());
     }
     if (lm == m)
@@ -1101,12 +1100,20 @@ class ClassHierarchyWalker {
         // Static methods don't override non-static so punt
         return true;
       }
-      if (   !Dependencies::is_concrete_method(lm, k)
+      if (!Dependencies::is_concrete_method(lm, ctxk) &&
-          && !Dependencies::is_concrete_method(m, ctxk)
+          !Dependencies::is_concrete_method(m, ctxk)) {
-          && lm->method_holder()->is_subtype_of(m->method_holder()))
+        // They are both non-concrete
+        if (lm->method_holder()->is_subtype_of(m->method_holder())) {
           // Method m is overridden by lm, but both are non-concrete.
           return true;
         }
+        if (lm->method_holder()->is_interface() && m->method_holder()->is_interface() &&
+            ctxk->is_subtype_of(m->method_holder()) && ctxk->is_subtype_of(lm->method_holder())) {
+          // Interface method defined in multiple super interfaces
+          return true;
+        }
+      }
+    }
     ResourceMark rm;
     tty->print_cr("Dependency method not found in the associated context:");
     tty->print_cr("  context = %s", ctxk->external_name());

hotspot/test/compiler/jvmci/common/testcases/DuplicateSimpleSingleImplementerInterface.java

@@ -0,0 +1,28 @@
+/*
+ * 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.
+ */
+
+package compiler.jvmci.common.testcases;
+
+public interface DuplicateSimpleSingleImplementerInterface {
+    void interfaceMethod();
+}

hotspot/test/compiler/jvmci/common/testcases/MultipleSuperImplementers.java

@@ -0,0 +1,29 @@
+/*
+ * 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.
+ */
+
+package compiler.jvmci.common.testcases;
+
+public abstract class MultipleSuperImplementers implements DuplicateSimpleSingleImplementerInterface, SimpleSingleImplementerInterface {
+    public void finalize() {
+    }
+}

hotspot/test/compiler/jvmci/common/testcases/SimpleSingleImplementerInterface.java

@@ -0,0 +1,28 @@
+/*
+ * 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.
+ */
+
+package compiler.jvmci.common.testcases;
+
+public interface SimpleSingleImplementerInterface {
+    void interfaceMethod();
+}

hotspot/test/compiler/jvmci/compilerToVM/FindUniqueConcreteMethodTest.java

@@ -32,6 +32,8 @@
  *          java.base/jdk.internal.org.objectweb.asm.tree
  *          jdk.vm.ci/jdk.vm.ci.hotspot
  *          jdk.vm.ci/jdk.vm.ci.code
+ *          jdk.vm.ci/jdk.vm.ci.meta
+ *          jdk.vm.ci/jdk.vm.ci.runtime
  * @build jdk.vm.ci/jdk.vm.ci.hotspot.CompilerToVMHelper
  * @build compiler.jvmci.compilerToVM.FindUniqueConcreteMethodTest
  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI
@@ -41,7 +43,10 @@
 package compiler.jvmci.compilerToVM;
 
 import compiler.jvmci.common.CTVMUtilities;
+import compiler.jvmci.common.testcases.DuplicateSimpleSingleImplementerInterface;
+import compiler.jvmci.common.testcases.SimpleSingleImplementerInterface;
 import compiler.jvmci.common.testcases.MultipleImplementer1;
+import compiler.jvmci.common.testcases.MultipleSuperImplementers;
 import compiler.jvmci.common.testcases.SingleImplementer;
 import compiler.jvmci.common.testcases.SingleImplementerInterface;
 import compiler.jvmci.common.testcases.SingleSubclass;
@@ -96,6 +101,11 @@ public class FindUniqueConcreteMethodTest {
         // static method
         result.add(new TestCase(false, SingleSubclass.class,
                 SingleSubclass.class, "staticMethod"));
+        // interface method
+        result.add(new TestCase(false, MultipleSuperImplementers.class,
+                                DuplicateSimpleSingleImplementerInterface.class, "interfaceMethod", false));
+        result.add(new TestCase(false, MultipleSuperImplementers.class,
+                                SimpleSingleImplementerInterface.class, "interfaceMethod", false));
         return result;
     }
 
@@ -103,7 +113,7 @@ public class FindUniqueConcreteMethodTest {
         System.out.println(tcase);
         Method method = tcase.holder.getDeclaredMethod(tcase.methodName);
         HotSpotResolvedJavaMethod testMethod = CTVMUtilities
-                .getResolvedMethod(tcase.receiver, method);
+            .getResolvedMethod(tcase.methodFromReceiver ? tcase.receiver : tcase.holder, method);
         HotSpotResolvedObjectType resolvedType = CompilerToVMHelper
                 .lookupType(Utils.toJVMTypeSignature(tcase.receiver), getClass(),
                 /* resolve = */ true);
@@ -118,20 +128,25 @@ public class FindUniqueConcreteMethodTest {
         public final Class<?> holder;
         public final String methodName;
         public final boolean isPositive;
+        public final boolean methodFromReceiver;
 
         public TestCase(boolean isPositive, Class<?> clazz, Class<?> holder,
-                String methodName) {
+                        String methodName, boolean methodFromReceiver) {
             this.receiver = clazz;
             this.methodName = methodName;
             this.isPositive = isPositive;
             this.holder = holder;
+            this.methodFromReceiver = methodFromReceiver;
+        }
+
+        public TestCase(boolean isPositive, Class<?> clazz, Class<?> holder, String methodName) {
+            this(isPositive, clazz, holder, methodName, true);
         }
 
         @Override
         public String toString() {
-            return String.format("CASE: receiver=%s, holder=%s, method=%s,"
+            return String.format("CASE: receiver=%s, holder=%s, method=%s, isPositive=%s, methodFromReceiver=%s",
-                    + " isPositive=%s", receiver.getName(),
+                                 receiver.getName(), holder.getName(), methodName, isPositive, methodFromReceiver);
-                    holder.getName(), methodName, isPositive);
         }
     }
 }