diff --git a/runtime/runtime_globals.h b/runtime/runtime_globals.h
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+/*
+ * Copyright (C) 2011 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.
+ */
+
+#ifndef ART_RUNTIME_RUNTIME_GLOBALS_H_
+#define ART_RUNTIME_RUNTIME_GLOBALS_H_
+
+#include "base/globals.h"
+
+namespace art {
+
+// Size of Dex virtual registers.
+static constexpr size_t kVRegSize = 4;
+
+// Returns whether the given memory offset can be used for generating
+// an implicit null check.
+static inline bool CanDoImplicitNullCheckOn(uintptr_t offset) {
+  return offset < kPageSize;
+}
+
+// Required object alignment
+static constexpr size_t kObjectAlignmentShift = 3;
+static constexpr size_t kObjectAlignment = 1u << kObjectAlignmentShift;
+static constexpr size_t kLargeObjectAlignment = kPageSize;
+
+// Garbage collector constants.
+static constexpr bool kMovingCollector = true;
+static constexpr bool kMarkCompactSupport = false && kMovingCollector;
+// True if we allow moving classes.
+static constexpr bool kMovingClasses = !kMarkCompactSupport;
+// If true, enable generational collection when using the Concurrent Copying
+// (CC) collector, i.e. use sticky-bit CC for minor collections and (full) CC
+// for major collections.
+//
+// Generational CC collection is currently only compatible with Baker read
+// barriers.
+#if defined(ART_USE_GENERATIONAL_CC) && defined(ART_READ_BARRIER_TYPE_IS_BAKER)
+static constexpr bool kEnableGenerationalConcurrentCopyingCollection = true;
+#else
+static constexpr bool kEnableGenerationalConcurrentCopyingCollection = false;
+#endif
+
+// If true, enable the tlab allocator by default.
+#ifdef ART_USE_TLAB
+static constexpr bool kUseTlab = true;
+#else
+static constexpr bool kUseTlab = false;
+#endif
+
+// Kinds of tracing clocks.
+enum class TraceClockSource {
+  kThreadCpu,
+  kWall,
+  kDual,  // Both wall and thread CPU clocks.
+};
+
+#if defined(__linux__)
+static constexpr TraceClockSource kDefaultTraceClockSource = TraceClockSource::kDual;
+#else
+static constexpr TraceClockSource kDefaultTraceClockSource = TraceClockSource::kWall;
+#endif
+
+static constexpr bool kDefaultMustRelocate = true;
+
+// Size of a heap reference.
+static constexpr size_t kHeapReferenceSize = sizeof(uint32_t);
+
+}  // namespace art
+
+#endif  // ART_RUNTIME_RUNTIME_GLOBALS_H_