1 /* 2 * Copyright (C) 2015 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 SIMPLE_PERF_ENVIRONMENT_H_ 18 #define SIMPLE_PERF_ENVIRONMENT_H_ 19 20 #include <sys/types.h> 21 22 #include <functional> 23 #include <set> 24 #include <string> 25 #include <vector> 26 27 #include "build_id.h" 28 29 std::vector<int> GetOnlineCpus(); 30 std::vector<int> GetCpusFromString(const std::string& s); 31 32 constexpr char DEFAULT_KERNEL_MMAP_NAME[] = "[kernel.kallsyms]_text"; 33 34 struct KernelMmap { 35 std::string name; 36 uint64_t start_addr; 37 uint64_t len; 38 std::string filepath; 39 }; 40 41 void GetKernelAndModuleMmaps(KernelMmap* kernel_mmap, std::vector<KernelMmap>* module_mmaps); 42 43 struct ThreadComm { 44 pid_t pid, tid; 45 std::string comm; 46 }; 47 48 bool GetThreadComms(std::vector<ThreadComm>* thread_comms); 49 50 constexpr char DEFAULT_EXECNAME_FOR_THREAD_MMAP[] = "//anon"; 51 52 struct ThreadMmap { 53 uint64_t start_addr; 54 uint64_t len; 55 uint64_t pgoff; 56 std::string name; 57 bool executable; 58 }; 59 60 bool GetThreadMmapsInProcess(pid_t pid, std::vector<ThreadMmap>* thread_mmaps); 61 62 constexpr char DEFAULT_KERNEL_FILENAME_FOR_BUILD_ID[] = "[kernel.kallsyms]"; 63 64 bool GetKernelBuildId(BuildId* build_id); 65 bool GetModuleBuildId(const std::string& module_name, BuildId* build_id); 66 67 bool GetValidThreadsFromProcessString(const std::string& pid_str, std::set<pid_t>* tid_set); 68 bool GetValidThreadsFromThreadString(const std::string& tid_str, std::set<pid_t>* tid_set); 69 70 bool GetExecPath(std::string* exec_path); 71 72 // Expose the following functions for unit tests. 73 struct KernelSymbol { 74 uint64_t addr; 75 char type; 76 const char* name; 77 const char* module; // If nullptr, the symbol is not in a kernel module. 78 }; 79 80 bool ProcessKernelSymbols(const std::string& symbol_file, 81 std::function<bool(const KernelSymbol&)> callback); 82 bool CheckPerfEventLimit(); 83 84 #endif // SIMPLE_PERF_ENVIRONMENT_H_ 85
