| // Copyright 2021 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef RUNTIME_PROBE_SYSTEM_HELPER_INVOKER_H_ |
| #define RUNTIME_PROBE_SYSTEM_HELPER_INVOKER_H_ |
| |
| #include <string> |
| |
| namespace runtime_probe { |
| |
| class ProbeFunction; |
| |
| class HelperInvoker { |
| public: |
| HelperInvoker() = default; |
| HelperInvoker(const HelperInvoker&) = delete; |
| HelperInvoker& operator=(const HelperInvoker&) = delete; |
| virtual ~HelperInvoker() = default; |
| |
| // Invokes an individual helper instance to perform the actual probing actions |
| // in a properly secured environment. The |probe_statement| is the input |
| // of the helper process. The method is a blocking call that returns after |
| // the helper process ends. If it successes, the method stores the probed |
| // result in |result| and returns |true|; otherwise, the method returns |
| // |false|. |
| virtual bool Invoke(const ProbeFunction* probe_function, |
| const std::string& probe_statement_str, |
| std::string* result) const = 0; |
| }; |
| |
| } // namespace runtime_probe |
| |
| #endif // RUNTIME_PROBE_SYSTEM_HELPER_INVOKER_H_ |