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 <vector> 22 23 namespace perfetto { 24 25 class AtraceWrapper { 26 public: 27 virtual ~AtraceWrapper(); 28 // When we are sideloaded on an old version of Android (pre P), we cannot use 29 // atrace --only_userspace because that option doesn't exist. In that case we: 30 // - Just use atrace --async_start/stop, which will cause atrace to also 31 // poke at ftrace. 32 // - Suppress the checks for "somebody else enabled ftrace unexpectedly". 33 virtual bool SupportsUserspaceOnly() = 0; 34 virtual bool SupportsPreferSdk() = 0; 35 virtual bool RunAtrace(const std::vector<std::string>& args, 36 std::string* atrace_errors) = 0; 37 }; 38 39 class AtraceWrapperImpl : public AtraceWrapper { 40 public: 41 ~AtraceWrapperImpl() override; 42 bool SupportsUserspaceOnly() override; 43 bool SupportsPreferSdk() override; 44 bool RunAtrace(const std::vector<std::string>& args, 45 std::string* atrace_errors) override; 46 }; 47 48 } // namespace perfetto 49 50 #endif // SRC_TRACED_PROBES_FTRACE_ATRACE_WRAPPER_H_ 51