//===-- ProcessMachCore.h ---------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#ifndef liblldb_ProcessMachCore_h_
#define liblldb_ProcessMachCore_h_

#include <list>
#include <vector>

#include "lldb/Target/Process.h"
#include "lldb/Utility/ConstString.h"
#include "lldb/Utility/Status.h"

class ThreadKDP;

class ProcessMachCore : public lldb_private::Process {
public:
  //------------------------------------------------------------------
  // Constructors and Destructors
  //------------------------------------------------------------------
  ProcessMachCore(lldb::TargetSP target_sp, lldb::ListenerSP listener,
                  const lldb_private::FileSpec &core_file);

  ~ProcessMachCore() override;

  static lldb::ProcessSP
  CreateInstance(lldb::TargetSP target_sp, lldb::ListenerSP listener,
                 const lldb_private::FileSpec *crash_file_path);

  static void Initialize();

  static void Terminate();

  static lldb_private::ConstString GetPluginNameStatic();

  static const char *GetPluginDescriptionStatic();

  //------------------------------------------------------------------
  // Check if a given Process
  //------------------------------------------------------------------
  bool CanDebug(lldb::TargetSP target_sp,
                bool plugin_specified_by_name) override;

  //------------------------------------------------------------------
  // Creating a new process, or attaching to an existing one
  //------------------------------------------------------------------
  lldb_private::Status DoLoadCore() override;

  lldb_private::DynamicLoader *GetDynamicLoader() override;

  //------------------------------------------------------------------
  // PluginInterface protocol
  //------------------------------------------------------------------
  lldb_private::ConstString GetPluginName() override;

  uint32_t GetPluginVersion() override;

  //------------------------------------------------------------------
  // Process Control
  //------------------------------------------------------------------
  lldb_private::Status DoDestroy() override;

  void RefreshStateAfterStop() override;

  //------------------------------------------------------------------
  // Process Queries
  //------------------------------------------------------------------
  bool IsAlive() override;

  bool WarnBeforeDetach() const override;

  //------------------------------------------------------------------
  // Process Memory
  //------------------------------------------------------------------
  size_t ReadMemory(lldb::addr_t addr, void *buf, size_t size,
                    lldb_private::Status &error) override;

  size_t DoReadMemory(lldb::addr_t addr, void *buf, size_t size,
                      lldb_private::Status &error) override;

  lldb_private::Status
  GetMemoryRegionInfo(lldb::addr_t load_addr,
                      lldb_private::MemoryRegionInfo &region_info) override;

  lldb::addr_t GetImageInfoAddress() override;

protected:
  friend class ThreadMachCore;

  void Clear();

  bool UpdateThreadList(lldb_private::ThreadList &old_thread_list,
                        lldb_private::ThreadList &new_thread_list) override;

  lldb_private::ObjectFile *GetCoreObjectFile();

private:
  bool GetDynamicLoaderAddress(lldb::addr_t addr);

  typedef enum CorefilePreference {
    eUserProcessCorefile,
    eKernelCorefile
  } CorefilePreferences;

  //------------------------------------------------------------------
  /// If a core file can be interpreted multiple ways, this establishes
  /// which style wins.
  ///
  /// If a core file contains both a kernel binary and a user-process
  /// dynamic loader, lldb needs to pick one over the other.  This could
  /// be a kernel corefile that happens to have a copy of dyld in its
  /// memory.  Or it could be a user process coredump of lldb while doing
  /// kernel debugging - so a copy of the kernel is in its heap.  This
  /// should become a setting so it can be over-ridden when necessary.
  //------------------------------------------------------------------
  CorefilePreference GetCorefilePreference() {
    // For now, if both user process and kernel binaries a present,
    // assume this is a kernel coredump which has a copy of a user
    // process dyld in one of its pages.
    return eKernelCorefile;
  }

  //------------------------------------------------------------------
  // For ProcessMachCore only
  //------------------------------------------------------------------
  typedef lldb_private::Range<lldb::addr_t, lldb::addr_t> FileRange;
  typedef lldb_private::RangeDataVector<lldb::addr_t, lldb::addr_t, FileRange>
      VMRangeToFileOffset;
  typedef lldb_private::RangeDataVector<lldb::addr_t, lldb::addr_t, uint32_t>
      VMRangeToPermissions;

  VMRangeToFileOffset m_core_aranges;
  VMRangeToPermissions m_core_range_infos;
  lldb::ModuleSP m_core_module_sp;
  lldb_private::FileSpec m_core_file;
  lldb::addr_t m_dyld_addr;
  lldb::addr_t m_mach_kernel_addr;
  lldb_private::ConstString m_dyld_plugin_name;

  DISALLOW_COPY_AND_ASSIGN(ProcessMachCore);
};

#endif // liblldb_ProcessMachCore_h_
