// Copyright 2020 The Crashpad Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef CRASHPAD_SNAPSHOT_IOS_PROCESS_SNAPSHOT_IOS_H_
#define CRASHPAD_SNAPSHOT_IOS_PROCESS_SNAPSHOT_IOS_H_

#include <sys/sysctl.h>

#include <vector>

#include "snapshot/ios/exception_snapshot_ios.h"
#include "snapshot/ios/module_snapshot_ios.h"
#include "snapshot/ios/system_snapshot_ios.h"
#include "snapshot/ios/thread_snapshot_ios.h"
#include "snapshot/process_snapshot.h"
#include "snapshot/thread_snapshot.h"
#include "snapshot/unloaded_module_snapshot.h"

namespace crashpad {

//! \brief A ProcessSnapshot of a running (or crashed) process running on a
//!     iphoneOS system.
class ProcessSnapshotIOS final : public ProcessSnapshot {
 public:
  ProcessSnapshotIOS();
  ~ProcessSnapshotIOS() override;

  //! \brief Initializes the object.
  //!
  //! \param[in] system_data A class containing various system data points.
  //!
  //! \return `true` if the snapshot could be created, `false` otherwise with
  //!     an appropriate message logged.
  bool Initialize(const IOSSystemDataCollector& system_data);

  //! \brief Initialize exception information from a signal.
  void SetExceptionFromSignal(const siginfo_t* siginfo,
                              const ucontext_t* context);

  //! \brief Initialize exception information from a Mach exception.
  void SetExceptionFromMachException(exception_behavior_t behavior,
                                     thread_t exception_thread,
                                     exception_type_t exception,
                                     const mach_exception_data_type_t* code,
                                     mach_msg_type_number_t code_count,
                                     thread_state_flavor_t flavor,
                                     ConstThreadState old_state,
                                     mach_msg_type_number_t old_state_count);

  //! \brief Sets the value to be returned by ClientID().
  //!
  //! On iOS, the client ID is under the control of the snapshot producer,
  //! which may call this method to set the client ID. If this is not done,
  //! ClientID() will return an identifier consisting entirely of zeroes.
  void SetClientID(const UUID& client_id) { client_id_ = client_id; }

  //! \brief Sets the value to be returned by ReportID().
  //!
  //! On iOS, the crash report ID is under the control of the snapshot
  //! producer, which may call this method to set the report ID. If this is not
  //! done, ReportID() will return an identifier consisting entirely of zeroes.
  void SetReportID(const UUID& report_id) { report_id_ = report_id; }

  // ProcessSnapshot:
  pid_t ProcessID() const override;
  pid_t ParentProcessID() const override;
  void SnapshotTime(timeval* snapshot_time) const override;
  void ProcessStartTime(timeval* start_time) const override;
  void ProcessCPUTimes(timeval* user_time, timeval* system_time) const override;
  void ReportID(UUID* report_id) const override;
  void ClientID(UUID* client_id) const override;
  const std::map<std::string, std::string>& AnnotationsSimpleMap()
      const override;
  const SystemSnapshot* System() const override;
  std::vector<const ThreadSnapshot*> Threads() const override;
  std::vector<const ModuleSnapshot*> Modules() const override;
  std::vector<UnloadedModuleSnapshot> UnloadedModules() const override;
  const ExceptionSnapshot* Exception() const override;
  std::vector<const MemoryMapRegionSnapshot*> MemoryMap() const override;
  std::vector<HandleSnapshot> Handles() const override;
  std::vector<const MemorySnapshot*> ExtraMemory() const override;
  const ProcessMemory* Memory() const override;

 private:
  // Initializes modules_ on behalf of Initialize().
  void InitializeModules();

  // Initializes threads_ on behalf of Initialize().
  void InitializeThreads();

  kinfo_proc kern_proc_info_;
  time_value_t basic_info_user_time_;
  time_value_t basic_info_system_time_;
  time_value_t thread_times_user_time_;
  time_value_t thread_times_system_time_;
  internal::SystemSnapshotIOS system_;
  std::vector<std::unique_ptr<internal::ThreadSnapshotIOS>> threads_;
  std::vector<std::unique_ptr<internal::ModuleSnapshotIOS>> modules_;
  std::unique_ptr<internal::ExceptionSnapshotIOS> exception_;
  UUID report_id_;
  UUID client_id_;
  std::map<std::string, std::string> annotations_simple_map_;
  timeval snapshot_time_;
  InitializationStateDcheck initialized_;

  DISALLOW_COPY_AND_ASSIGN(ProcessSnapshotIOS);
};

}  // namespace crashpad

#endif  // CRASHPAD_SNAPSHOT_IOS_PROCESS_SNAPSHOT_IOS_H_