1 /* 2 * Copyright (c) 2022 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 #ifndef CRASH_VALIDATOR_H 16 #define CRASH_VALIDATOR_H 17 18 #include "plugin.h" 19 #include "sys_event.h" 20 21 #include <memory> 22 #include <mutex> 23 #include <vector> 24 25 namespace OHOS { 26 namespace HiviewDFX { 27 class CrashEvent { 28 public: 29 uint64_t time {0}; 30 uint64_t pid {0}; 31 uint64_t uid {0}; 32 std::string path {""}; 33 std::string name {""}; 34 bool isCppCrash {false}; 35 }; 36 // every CPP_CRASH should have corresponding PROCESS_EXIT event and 37 // every PROCESS_EXIT event that triggered by crash signal should have corresponding CPP_CRASH events 38 // check the existence of these event to judge whether we have loss some crash log 39 class CrashValidator : public EventListener, public Plugin { 40 public: 41 CrashValidator(); 42 ~CrashValidator(); 43 44 bool ReadyToLoad() override; 45 void OnLoad() override; 46 void OnUnload() override; 47 bool OnEvent(std::shared_ptr<Event>& event) override; 48 void OnUnorderedEvent(const Event &event) override; 49 bool CanProcessEvent(std::shared_ptr<Event> event) override; 50 std::string GetListenerName() override; 51 void Dump(int fd, const std::vector<std::string>& cmds) override; 52 53 private: 54 bool ValidateLogContent(const CrashEvent& event); 55 bool RemoveSimilarEvent(const CrashEvent& event); 56 void HandleCppCrashEvent(SysEvent& sysEvent); 57 void HandleProcessExitEvent(SysEvent& sysEvent); 58 void PrintEvents(int fd, const std::vector<CrashEvent>& events); 59 void ReadServiceCrashStatus(); 60 void CheckOutOfDateEvents(); 61 bool stopReadKmsg_; 62 uint32_t totalEventCount_; 63 uint32_t normalEventCount_; 64 std::unique_ptr<std::thread> kmsgReaderThread_; 65 std::vector<CrashEvent> pendingEvents_; 66 std::vector<CrashEvent> noLogEvents_; 67 std::vector<CrashEvent> matchedEvents_; 68 std::mutex lock_; 69 }; 70 } // namespace HiviewDFX 71 } // namespace OHOS 72 #endif // CRASH_VALIDATOR_H