1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SRC_TRACED_PROBES_FTRACE_ATRACE_WRAPPER_H_ 18 #define SRC_TRACED_PROBES_FTRACE_ATRACE_WRAPPER_H_ 19 20 #include <string> 21 #include <type_traits> 22 #include <vector> 23 24 namespace perfetto { 25 26 using RunAtraceFunction = 27 std::add_pointer<bool(const std::vector<std::string>& /*args*/, 28 std::string* /*atrace_errors*/)>::type; 29 30 // When we are sideloaded on an old version of Android (pre P), we cannot use 31 // atrace --only_userspace because that option doesn't exist. In that case we: 32 // - Just use atrace --async_start/stop, which will cause atrace to also 33 // poke at ftrace. 34 // - Suppress the checks for "somebody else enabled ftrace unexpectedly". 35 bool IsOldAtrace(); 36 void SetIsOldAtraceForTesting(bool); 37 void ClearIsOldAtraceForTesting(); 38 39 bool RunAtrace(const std::vector<std::string>& args, 40 std::string* atrace_errors); 41 void SetRunAtraceForTesting(RunAtraceFunction); 42 43 } // namespace perfetto 44 45 #endif // SRC_TRACED_PROBES_FTRACE_ATRACE_WRAPPER_H_ 46