chore: import upstream snapshot with attribution

test/gperftools_helper.h

@@ -0,0 +1,34 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you 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 TEST_GPERFTOOLS_HELPER_H_
+#define TEST_GPERFTOOLS_HELPER_H_
+
+#if defined(BRPC_ENABLE_CPU_PROFILER) || defined(BAIDU_RPC_ENABLE_CPU_PROFILER)
+#include "butil/gperftools_profiler.h"
+#else
+extern "C" {
+
+// If gperftools are not used, these functions are no-ops.
+inline int ProfilerStart(const char*) { return 0; }
+inline void ProfilerStop() {}
+inline void ProfilerFlush() {}
+
+}  // extern "C"
+#endif // BRPC_ENABLE_CPU_PROFILER || BAIDU_RPC_ENABLE_CPU_PROFILER
+
+#endif // TEST_GPERFTOOLS_HELPER_H_