--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/EmptyEventProvider.java	Tue Oct 11 22:13:23 2016 +0200
@@ -0,0 +1,109 @@
+/*
+ * 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.
+ */
+package jdk.vm.ci.hotspot;
+
+/**
+ * An empty implementation for {@link EventProvider}. This implementation is used when no logging is
+ * requested.
+ */
+final class EmptyEventProvider implements EventProvider {
+
+    static InternalError shouldNotReachHere() {
+        throw new InternalError("should not reach here");
+    }
+
+    @Override
+    public CompilationEvent newCompilationEvent() {
+        return new EmptyCompilationEvent();
+    }
+
+    static class EmptyCompilationEvent implements CompilationEvent {
+        public void commit() {
+            throw shouldNotReachHere();
+        }
+
+        public boolean shouldWrite() {
+            // Events of this class should never been written.
+            return false;
+        }
+
+        public void begin() {
+        }
+
+        public void end() {
+        }
+
+        public void setMethod(String method) {
+            throw shouldNotReachHere();
+        }
+
+        public void setCompileId(int compileId) {
+            throw shouldNotReachHere();
+        }
+
+        public void setCompileLevel(int compileLevel) {
+            throw shouldNotReachHere();
+        }
+
+        public void setSucceeded(boolean succeeded) {
+            throw shouldNotReachHere();
+        }
+
+        public void setIsOsr(boolean isOsr) {
+            throw shouldNotReachHere();
+        }
+
+        public void setCodeSize(int codeSize) {
+            throw shouldNotReachHere();
+        }
+
+        public void setInlinedBytes(int inlinedBytes) {
+            throw shouldNotReachHere();
+        }
+    }
+
+    @Override
+    public CompilerFailureEvent newCompilerFailureEvent() {
+        return new EmptyCompilerFailureEvent();
+    }
+
+    static class EmptyCompilerFailureEvent implements CompilerFailureEvent {
+        public void commit() {
+            throw shouldNotReachHere();
+        }
+
+        public boolean shouldWrite() {
+            // Events of this class should never been written.
+            return false;
+        }
+
+        public void setCompileId(int compileId) {
+            throw shouldNotReachHere();
+        }
+
+        public void setMessage(String message) {
+            throw shouldNotReachHere();
+        }
+    }
+
+}