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      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 #include "perfetto/ftrace_reader/ftrace_config.h"
     18 
     19 #include "perfetto/base/logging.h"
     20 
     21 namespace perfetto {
     22 namespace {
     23 
     24 bool IsGoodPunctuation(char c) {
     25   return c == '_' || c == '.';
     26 }
     27 
     28 bool IsValid(const std::string& str) {
     29   for (size_t i = 0; i < str.size(); i++) {
     30     if (!isalnum(str[i]) && !IsGoodPunctuation(str[i]))
     31       return false;
     32   }
     33   return true;
     34 }
     35 
     36 }  // namespace
     37 
     38 std::set<std::string> FtraceEventsAsSet(const FtraceConfig& config) {
     39   std::set<std::string> events;
     40   for (const std::string& event : config.ftrace_events())
     41     events.insert(event);
     42   return events;
     43 }
     44 
     45 FtraceConfig CreateFtraceConfig(std::set<std::string> names) {
     46   FtraceConfig config;
     47   for (const std::string& name : names)
     48     *config.add_ftrace_events() = name;
     49   return config;
     50 }
     51 
     52 bool RequiresAtrace(const FtraceConfig& config) {
     53   return !config.atrace_categories().empty() || !config.atrace_apps().empty();
     54 }
     55 
     56 bool ValidConfig(const FtraceConfig& config) {
     57   for (const std::string& event_name : config.ftrace_events()) {
     58     if (!IsValid(event_name)) {
     59       PERFETTO_ELOG("Bad event name '%s'", event_name.c_str());
     60       return false;
     61     }
     62   }
     63   for (const std::string& category : config.atrace_categories()) {
     64     if (!IsValid(category)) {
     65       PERFETTO_ELOG("Bad category name '%s'", category.c_str());
     66       return false;
     67     }
     68   }
     69   for (const std::string& app : config.atrace_apps()) {
     70     if (!IsValid(app)) {
     71       PERFETTO_ELOG("Bad app '%s'", app.c_str());
     72       return false;
     73     }
     74   }
     75   return true;
     76 }
     77 
     78 }  // namespace perfetto
     79