Add a target to run the SyzyAsan RTL unittests in 4G

syzygy/agent/asan/dummy_shadow.cc

-// Copyright 2015 Google Inc. All Rights Reserved.
-//
-// 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.
-//
-// Provides a dummy static shadow memory array. This is simply to be used as
-// a pointer for the probes to be anchored to. If any of the probes referring
-// to this dummy shadow memory are run they will behave badly until they have
-// been patched using 'PatchMemoryInterceptorShadowReferences'.
-//
-// Intended for use in syzyasan_rtl.dll.
-
-#include <cstdint>
-
-namespace {
-
-static const size_t kShadowSize = 1;
-
-}  // namespace
-
-extern "C" {
-size_t asan_memory_interceptors_shadow_memory_size = kShadowSize;
-uint8_t asan_memory_interceptors_shadow_memory[kShadowSize] = {};
-}