diff --git a/test/148-multithread-gc-annotations/gc_coverage.cc b/test/148-multithread-gc-annotations/gc_coverage.cc
new file mode 100644
index 0000000..263eefd
--- /dev/null
+++ b/test/148-multithread-gc-annotations/gc_coverage.cc
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2015 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 "gc/heap.h"
+#include "jni.h"
+#include "runtime.h"
+#include "scoped_thread_state_change.h"
+#include "thread-inl.h"
+
+namespace art {
+namespace {
+
+extern "C" JNIEXPORT jboolean JNICALL Java_MovingGCThread_performHomogeneousSpaceCompact(JNIEnv*, jclass) {
+  return Runtime::Current()->GetHeap()->PerformHomogeneousSpaceCompact() == gc::kSuccess ?
+      JNI_TRUE : JNI_FALSE;
+}
+
+extern "C" JNIEXPORT jboolean JNICALL Java_MovingGCThread_supportHomogeneousSpaceCompact(JNIEnv*, jclass) {
+  return Runtime::Current()->GetHeap()->SupportHomogeneousSpaceCompactAndCollectorTransitions() ?
+      JNI_TRUE : JNI_FALSE;
+}
+
+extern "C" JNIEXPORT jlong JNICALL Java_MovingGCThread_objectAddress(JNIEnv* env, jclass, jobject object) {
+  ScopedObjectAccess soa(env);
+  return reinterpret_cast<jlong>(soa.Decode<mirror::Object*>(object));
+}
+
+}  // namespace
+}  // namespace art