diff --git a/src/java_lang_Runtime.cc b/src/java_lang_Runtime.cc
new file mode 100644
index 0000000..a2bd399
--- /dev/null
+++ b/src/java_lang_Runtime.cc
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <unistd.h>
+#include <limits.h>
+
+#include "heap.h"
+#include "jni_internal.h"
+#include "object.h"
+#include "runtime.h"
+
+#include "JniConstants.h" // Last to avoid problems with LOG redefinition.
+#include "ScopedUtfChars.h"
+
+namespace art {
+
+namespace {
+
+void Runtime_gc(JNIEnv*, jclass) {
+  Heap::CollectGarbage();
+}
+
+void Runtime_nativeExit(JNIEnv* env, jclass, jint status, jboolean isExit) {
+  // isExit is true for System.exit and false for System.halt.
+  if (isExit) {
+    Runtime::Current()->CallExitHook(status);
+  }
+  exit(status);
+}
+
+/*
+ * static String nativeLoad(String filename, ClassLoader loader)
+ *
+ * Load the specified full path as a dynamic library filled with
+ * JNI-compatible methods. Returns null on success, or a failure
+ * message on failure.
+ */
+jstring Runtime_nativeLoad(JNIEnv* env, jclass, jstring javaFilename, jobject javaLoader) {
+  ScopedUtfChars filename(env, javaFilename);
+  if (filename.c_str() == NULL) {
+    return NULL;
+  }
+
+  ClassLoader* classLoader = Decode<ClassLoader*>(env, javaLoader);
+  std::string detail;
+  JavaVMExt* vm = Runtime::Current()->GetJavaVM();
+  bool success = vm->LoadNativeLibrary(filename.c_str(), classLoader, detail);
+  if (success) {
+    return NULL;
+  }
+
+  return env->NewStringUTF(detail.c_str());
+}
+
+jlong Runtime_maxMemory(JNIEnv* env, jclass) {
+  return Heap::GetMaxMemory();
+}
+
+jlong Runtime_totalMemory(JNIEnv* env, jclass) {
+  return Heap::GetTotalMemory();
+}
+
+jlong Runtime_freeMemory(JNIEnv* env, jclass) {
+  return Heap::GetFreeMemory();
+}
+
+static JNINativeMethod gMethods[] = {
+    NATIVE_METHOD(Runtime, freeMemory, "()J"),
+    NATIVE_METHOD(Runtime, gc, "()V"),
+    NATIVE_METHOD(Runtime, maxMemory, "()J"),
+    NATIVE_METHOD(Runtime, nativeExit, "(IZ)V"),
+    NATIVE_METHOD(Runtime, nativeLoad, "(Ljava/lang/String;Ljava/lang/ClassLoader;)Ljava/lang/String;"),
+    NATIVE_METHOD(Runtime, totalMemory, "()J"),
+};
+
+}  // namespace
+
+void register_java_lang_Runtime(JNIEnv* env) {
+    jniRegisterNativeMethods(env, "java/lang/Runtime", gMethods, NELEM(gMethods));
+}
+
+}  // namespace art