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diff --git a/runtime/lambda/leaking_allocator.h b/runtime/lambda/leaking_allocator.h
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+/*
+ * 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.
+ */
+#ifndef ART_RUNTIME_LAMBDA_LEAKING_ALLOCATOR_H_
+#define ART_RUNTIME_LAMBDA_LEAKING_ALLOCATOR_H_
+
+#include <utility>  // std::forward
+
+namespace art {
+class Thread;  // forward declaration
+
+namespace lambda {
+
+// Temporary class to centralize all the leaking allocations.
+// Allocations made through this class are never freed, but it is a placeholder
+// that means that the calling code needs to be rewritten to properly:
+//
+// (a) Have a lifetime scoped to some other entity.
+// (b) Not be allocated over and over again if it was already allocated once (immutable data).
+//
+// TODO: do all of the above a/b for each callsite, and delete this class.
+class LeakingAllocator {
+ public:
+  // Allocate byte_size bytes worth of memory. Never freed.
+  static void* AllocateMemory(Thread* self, size_t byte_size);
+
+  // Make a new instance of T, flexibly sized, in-place at newly allocated memory. Never freed.
+  template <typename T, typename... Args>
+  static T* MakeFlexibleInstance(Thread* self, size_t byte_size, Args&&... args) {
+    return new (AllocateMemory(self, byte_size)) T(std::forward<Args>(args)...);
+  }
+
+  // Make a new instance of T in-place at newly allocated memory. Never freed.
+  template <typename T, typename... Args>
+  static T* MakeInstance(Thread* self, Args&&... args) {
+    return new (AllocateMemory(self, sizeof(T))) T(std::forward<Args>(args)...);
+  }
+};
+
+}  // namespace lambda
+}  // namespace art
+
+#endif  // ART_RUNTIME_LAMBDA_LEAKING_ALLOCATOR_H_