text: /**********************************************************************
   *
   * StackWalker.cpp
   * https://github.com/JochenKalmbach/StackWalker
   *
   * Old location: http://stackwalker.codeplex.com/
   *
   *
   * History:
   *  2005-07-27   v1    - First public release on http://www.codeproject.com/
   *                       http://www.codeproject.com/threads/StackWalker.asp
   *  2005-07-28   v2    - Changed the params of the constructor and ShowCallstack
   *                       (to simplify the usage)
   *  2005-08-01   v3    - Changed to use 'CONTEXT_FULL' instead of CONTEXT_ALL
   *                       (should also be enough)
   *                     - Changed to compile correctly with the PSDK of VC7.0
   *                       (GetFileVersionInfoSizeA and GetFileVersionInfoA is wrongly defined:
   *                        it uses LPSTR instead of LPCSTR as first parameter)
   *                     - Added declarations to support VC5/6 without using 'dbghelp.h'
   *                     - Added a 'pUserData' member to the ShowCallstack function and the
   *                       PReadProcessMemoryRoutine declaration (to pass some user-defined data,
   *                       which can be used in the readMemoryFunction-callback)
   *  2005-08-02   v4    - OnSymInit now also outputs the OS-Version by default
   *                     - Added example for doing an exception-callstack-walking in main.cpp
   *                       (thanks to owillebo: http://www.codeproject.com/script/profile/whos_who.asp?id=536268)
   *  2005-08-05   v5    - Removed most Lint (http://www.gimpel.com/) errors... thanks to Okko Willeboordse!
   *  2008-08-04   v6    - Fixed Bug: Missing LEAK-end-tag
   *                       http://www.codeproject.com/KB/applications/leakfinder.aspx?msg=2502890#xx2502890xx
   *                       Fixed Bug: Compiled with "WIN32_LEAN_AND_MEAN"
   *                       http://www.codeproject.com/KB/applications/leakfinder.aspx?msg=1824718#xx1824718xx
   *                       Fixed Bug: Compiling with "/Wall"
   *                       http://www.codeproject.com/KB/threads/StackWalker.aspx?msg=2638243#xx2638243xx
   *                       Fixed Bug: Now checking SymUseSymSrv
   *                       http://www.codeproject.com/KB/threads/StackWalker.aspx?msg=1388979#xx1388979xx
   *                       Fixed Bug: Support for recursive function calls
   *                       http://www.codeproject.com/KB/threads/StackWalker.aspx?msg=1434538#xx1434538xx
   *                       Fixed Bug: Missing FreeLibrary call in "GetModuleListTH32"
   *                       http://www.codeproject.com/KB/threads/StackWalker.aspx?msg=1326923#xx1326923xx
   *                       Fixed Bug: SymDia is number 7, not 9!
   *  2008-09-11   v7      For some (undocumented) reason, dbhelp.h is needing a packing of 8!
   *                       Thanks to Teajay which reported the bug...
   *                       http://www.codeproject.com/KB/applications/leakfinder.aspx?msg=2718933#xx2718933xx
   *  2008-11-27   v8      Debugging Tools for Windows are now stored in a different directory
   *                       Thanks to Luiz Salamon which reported this "bug"...
   *                       http://www.codeproject.com/KB/threads/StackWalker.aspx?msg=2822736#xx2822736xx
   *  2009-04-10   v9      License slightly corrected (<ORGANIZATION> replaced)
   *  2009-11-01   v10     Moved to http://stackwalker.codeplex.com/
   *  2009-11-02   v11     Now try to use IMAGEHLP_MODULE64_V3 if available
   *  2010-04-15   v12     Added support for VS2010 RTM
   *  2010-05-25   v13     Now using secure MyStrcCpy. Thanks to luke.simon:
   *                       http://www.codeproject.com/KB/applications/leakfinder.aspx?msg=3477467#xx3477467xx
   *  2013-01-07   v14     Runtime Check Error VS2010 Debug Builds fixed:
   *                       http://stackwalker.codeplex.com/workitem/10511
   *
   *
   * LICENSE (http://www.opensource.org/licenses/bsd-license.php)
   *
   *   Copyright (c) 2005-2013, Jochen Kalmbach
   *   All rights reserved.
   *
   *   Redistribution and use in source and binary forms, with or without modification,
   *   are permitted provided that the following conditions are met:
   *
   *   Redistributions of source code must retain the above copyright notice,
   *   this list of conditions and the following disclaimer.
   *   Redistributions in binary form must reproduce the above copyright notice,
   *   this list of conditions and the following disclaimer in the documentation
   *   and/or other materials provided with the distribution.
   *   Neither the name of Jochen Kalmbach nor the names of its contributors may be
   *   used to endorse or promote products derived from this software without
   *   specific prior written permission.
   *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   *   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   *   THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   *   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
   *   FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   *   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   *   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   *   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   *   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   **********************************************************************/
  
  #include "StackWalker.h"
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <tchar.h>
  //#include <windows.h>
  #pragma comment(lib, "version.lib") // for "VerQueryValue"
  #pragma warning(disable : 4826)
  
  
   // If VC7 and later, then use the shipped 'dbghelp.h'-file
  #pragma pack(push, 8)
  #if _MSC_VER >= 1300
  #include <dbghelp.h>
  #else
  // inline the important dbghelp.h-declarations...
  typedef enum
  {
      SymNone = 0,
      SymCoff,
      SymCv,
      SymPdb,
      SymExport,
      SymDeferred,
      SymSym,
      SymDia,
      SymVirtual,
      NumSymTypes
  } SYM_TYPE;
  typedef struct _IMAGEHLP_LINE64
  {
      DWORD   SizeOfStruct; // set to sizeof(IMAGEHLP_LINE64)
      PVOID   Key;          // internal
      DWORD   LineNumber;   // line number in file
      PCHAR   FileName;     // full filename
      DWORD64 Address;      // first instruction of line
  } IMAGEHLP_LINE64, * PIMAGEHLP_LINE64;
  typedef struct _IMAGEHLP_MODULE64
  {
      DWORD    SizeOfStruct;         // set to sizeof(IMAGEHLP_MODULE64)
      DWORD64  BaseOfImage;          // base load address of module
      DWORD    ImageSize;            // virtual size of the loaded module
      DWORD    TimeDateStamp;        // date/time stamp from pe header
      DWORD    CheckSum;             // checksum from the pe header
      DWORD    NumSyms;              // number of symbols in the symbol table
      SYM_TYPE SymType;              // type of symbols loaded
      CHAR     ModuleName[32];       // module name
      CHAR     ImageName[256];       // image name
      CHAR     LoadedImageName[256]; // symbol file name
  } IMAGEHLP_MODULE64, * PIMAGEHLP_MODULE64;
  typedef struct _IMAGEHLP_SYMBOL64
  {
      DWORD   SizeOfStruct;  // set to sizeof(IMAGEHLP_SYMBOL64)
      DWORD64 Address;       // virtual address including dll base address
      DWORD   Size;          // estimated size of symbol, can be zero
      DWORD   Flags;         // info about the symbols, see the SYMF defines
      DWORD   MaxNameLength; // maximum size of symbol name in 'Name'
      CHAR    Name[1];       // symbol name (null terminated string)
  } IMAGEHLP_SYMBOL64, * PIMAGEHLP_SYMBOL64;
  typedef enum
  {
      AddrMode1616,
      AddrMode1632,
      AddrModeReal,
      AddrModeFlat
  } ADDRESS_MODE;
  typedef struct _tagADDRESS64
  {
      DWORD64      Offset;
      WORD         Segment;
      ADDRESS_MODE Mode;
  } ADDRESS64, * LPADDRESS64;
  typedef struct _KDHELP64
  {
      DWORD64 Thread;
      DWORD   ThCallbackStack;
      DWORD   ThCallbackBStore;
      DWORD   NextCallback;
      DWORD   FramePointer;
      DWORD64 KiCallUserMode;
      DWORD64 KeUserCallbackDispatcher;
      DWORD64 SystemRangeStart;
      DWORD64 Reserved[8];
  } KDHELP64, * PKDHELP64;
  typedef struct _tagSTACKFRAME64
  {
      ADDRESS64 AddrPC;         // program counter
      ADDRESS64 AddrReturn;     // return address
      ADDRESS64 AddrFrame;      // frame pointer
      ADDRESS64 AddrStack;      // stack pointer
      ADDRESS64 AddrBStore;     // backing store pointer
      PVOID     FuncTableEntry; // pointer to pdata/fpo or NULL
      DWORD64   Params[4];      // possible arguments to the function
      BOOL      Far;            // WOW far call
      BOOL      Virtual;        // is this a virtual frame?
      DWORD64   Reserved[3];
      KDHELP64  KdHelp;
  } STACKFRAME64, * LPSTACKFRAME64;
  typedef BOOL(__stdcall* PREAD_PROCESS_MEMORY_ROUTINE64)(HANDLE  hProcess,
      DWORD64 qwBaseAddress,
      PVOID   lpBuffer,
      DWORD   nSize,
      LPDWORD lpNumberOfBytesRead);
  typedef PVOID(__stdcall* PFUNCTION_TABLE_ACCESS_ROUTINE64)(HANDLE hProcess, DWORD64 AddrBase);
  typedef DWORD64(__stdcall* PGET_MODULE_BASE_ROUTINE64)(HANDLE hProcess, DWORD64 Address);
  typedef DWORD64(__stdcall* PTRANSLATE_ADDRESS_ROUTINE64)(HANDLE      hProcess,
      HANDLE      hThread,
      LPADDRESS64 lpaddr);
  
  // clang-format off
  #define SYMOPT_CASE_INSENSITIVE         0x00000001
  #define SYMOPT_UNDNAME                  0x00000002
  #define SYMOPT_DEFERRED_LOADS           0x00000004
  #define SYMOPT_NO_CPP                   0x00000008
  #define SYMOPT_LOAD_LINES               0x00000010
  #define SYMOPT_OMAP_FIND_NEAREST        0x00000020
  #define SYMOPT_LOAD_ANYTHING            0x00000040
  #define SYMOPT_IGNORE_CVREC             0x00000080
  #define SYMOPT_NO_UNQUALIFIED_LOADS     0x00000100
  #define SYMOPT_FAIL_CRITICAL_ERRORS     0x00000200
  #define SYMOPT_EXACT_SYMBOLS            0x00000400
  #define SYMOPT_ALLOW_ABSOLUTE_SYMBOLS   0x00000800
  #define SYMOPT_IGNORE_NT_SYMPATH        0x00001000
  #define SYMOPT_INCLUDE_32BIT_MODULES    0x00002000
  #define SYMOPT_PUBLICS_ONLY             0x00004000
  #define SYMOPT_NO_PUBLICS               0x00008000
  #define SYMOPT_AUTO_PUBLICS             0x00010000
  #define SYMOPT_NO_IMAGE_SEARCH          0x00020000
  #define SYMOPT_SECURE                   0x00040000
  #define SYMOPT_DEBUG                    0x80000000
  #define UNDNAME_COMPLETE                 (0x0000) // Enable full undecoration
  #define UNDNAME_NAME_ONLY                (0x1000) // Crack only the name for primary declaration;
  // clang-format on
  
  #endif // _MSC_VER < 1300
  #pragma pack(pop)
  
  // Some missing defines (for VC5/6):
  #ifndef INVALID_FILE_ATTRIBUTES
  #define INVALID_FILE_ATTRIBUTES ((DWORD)-1)
  #endif
  
  // secure-CRT_functions are only available starting with VC8
  #if _MSC_VER < 1400
  #define strcpy_s(dst, len, src) strcpy(dst, src)
  #define strncpy_s(dst, len, src, maxLen) strncpy(dst, len, src)
  #define strcat_s(dst, len, src) strcat(dst, src)
  #define _snprintf_s _snprintf
  #define _tcscat_s _tcscat
  #endif
  
  static void MyStrCpy(char* szDest, size_t nMaxDestSize, const char* szSrc)
  {
      if (nMaxDestSize <= 0)
          return;
      strncpy_s(szDest, nMaxDestSize, szSrc, _TRUNCATE);
      // INFO: _TRUNCATE will ensure that it is null-terminated;
      // but with older compilers (<1400) it uses "strncpy" and this does not!)
      szDest[nMaxDestSize - 1] = 0;
  } // MyStrCpy
  
  // Normally it should be enough to use 'CONTEXT_FULL' (better would be 'CONTEXT_ALL')
  #define USED_CONTEXT_FLAGS CONTEXT_FULL
  
  class StackWalkerInternal
  {
  public:
      StackWalkerInternal(StackWalker* parent, HANDLE hProcess)
      {
          m_parent = parent;
          m_hDbhHelp = NULL;
          pSC = NULL;
          m_hProcess = hProcess;
          m_szSymPath = NULL;
          pSFTA = NULL;
          pSGLFA = NULL;
          pSGMB = NULL;
          pSGMI = NULL;
          pSGO = NULL;
          pSGSFA = NULL;
          pSI = NULL;
          pSLM = NULL;
          pSSO = NULL;
          pSW = NULL;
          pUDSN = NULL;
          pSGSP = NULL;
      }
      ~StackWalkerInternal()
      {
          if (pSC != NULL)
              pSC(m_hProcess); // SymCleanup
          if (m_hDbhHelp != NULL)
              FreeLibrary(m_hDbhHelp);
          m_hDbhHelp = NULL;
          m_parent = NULL;
          if (m_szSymPath != NULL)
              free(m_szSymPath);
          m_szSymPath = NULL;
      }
      BOOL Init(LPCSTR szSymPath)
      {
          if (m_parent == NULL)
              return FALSE;
          // Dynamically load the Entry-Points for dbghelp.dll:
          // First try to load the newest one from
          TCHAR szTemp[4096];
          // But before we do this, we first check if the ".local" file exists
          if (GetModuleFileName(NULL, szTemp, 4096) > 0)
          {
              _tcscat_s(szTemp, _T(".local"));
              if (GetFileAttributes(szTemp) == INVALID_FILE_ATTRIBUTES)
              {
                  // ".local" file does not exist, so we can try to load the dbghelp.dll from the "Debugging Tools for Windows"
                  // Ok, first try the new path according to the architecture:
  #ifdef _M_IX86
                  if ((m_hDbhHelp == NULL) && (GetEnvironmentVariable(_T("ProgramFiles"), szTemp, 4096) > 0))
                  {
                      _tcscat_s(szTemp, _T("\\Debugging Tools for Windows (x86)\\dbghelp.dll"));
                      // now check if the file exists:
                      if (GetFileAttributes(szTemp) != INVALID_FILE_ATTRIBUTES)
                      {
                          m_hDbhHelp = LoadLibrary(szTemp);
                      }
                  }
  #elif _M_X64
                  if ((m_hDbhHelp == NULL) && (SKSE::WinAPI::CLSSEGetEnvironmentVariable(_T("ProgramFiles"), szTemp, 4096) > 0))
                  {
                      _tcscat_s(szTemp, _T("\\Debugging Tools for Windows (x64)\\dbghelp.dll"));
                      // now check if the file exists:
                      if (GetFileAttributes(szTemp) != INVALID_FILE_ATTRIBUTES)
                      {
                          m_hDbhHelp = LoadLibrary(szTemp);
                      }
                  }
  #elif _M_IA64
                  if ((m_hDbhHelp == NULL) && (GetEnvironmentVariable(_T("ProgramFiles"), szTemp, 4096) > 0))
                  {
                      _tcscat_s(szTemp, _T("\\Debugging Tools for Windows (ia64)\\dbghelp.dll"));
                      // now check if the file exists:
                      if (GetFileAttributes(szTemp) != INVALID_FILE_ATTRIBUTES)
                      {
                          m_hDbhHelp = LoadLibrary(szTemp);
                      }
                  }
  #endif
                  // If still not found, try the old directories...
                  if ((m_hDbhHelp == NULL) && (SKSE::WinAPI::CLSSEGetEnvironmentVariable(_T("ProgramFiles"), szTemp, 4096) > 0))
                  {
                      _tcscat_s(szTemp, _T("\\Debugging Tools for Windows\\dbghelp.dll"));
                      // now check if the file exists:
                      if (GetFileAttributes(szTemp) != INVALID_FILE_ATTRIBUTES)
                      {
                          m_hDbhHelp = LoadLibrary(szTemp);
                      }
                  }
  #if defined _M_X64 || defined _M_IA64
                  // Still not found? Then try to load the (old) 64-Bit version:
                  if ((m_hDbhHelp == NULL) && (SKSE::WinAPI::CLSSEGetEnvironmentVariable(_T("ProgramFiles"), szTemp, 4096) > 0))
                  {
                      _tcscat_s(szTemp, _T("\\Debugging Tools for Windows 64-Bit\\dbghelp.dll"));
                      if (GetFileAttributes(szTemp) != INVALID_FILE_ATTRIBUTES)
                      {
                          m_hDbhHelp = LoadLibrary(szTemp);
                      }
                  }
  #endif
              }
          }
          if (m_hDbhHelp == NULL) // if not already loaded, try to load a default-one
              m_hDbhHelp = LoadLibrary(_T("dbghelp.dll"));
          if (m_hDbhHelp == NULL)
              return FALSE;
          pSI = (tSI)GetProcAddress(m_hDbhHelp, "SymInitialize");
          pSC = (tSC)GetProcAddress(m_hDbhHelp, "SymCleanup");
  
          pSW = (tSW)GetProcAddress(m_hDbhHelp, "StackWalk64");
          pSGO = (tSGO)GetProcAddress(m_hDbhHelp, "SymGetOptions");
          pSSO = (tSSO)GetProcAddress(m_hDbhHelp, "SymSetOptions");
  
          pSFTA = (tSFTA)GetProcAddress(m_hDbhHelp, "SymFunctionTableAccess64");
          pSGLFA = (tSGLFA)GetProcAddress(m_hDbhHelp, "SymGetLineFromAddr64");
          pSGMB = (tSGMB)GetProcAddress(m_hDbhHelp, "SymGetModuleBase64");
          pSGMI = (tSGMI)GetProcAddress(m_hDbhHelp, "SymGetModuleInfo64");
          pSGSFA = (tSGSFA)GetProcAddress(m_hDbhHelp, "SymGetSymFromAddr64");
          pUDSN = (tUDSN)GetProcAddress(m_hDbhHelp, "UnDecorateSymbolName");
          pSLM = (tSLM)GetProcAddress(m_hDbhHelp, "SymLoadModule64");
          pSGSP = (tSGSP)GetProcAddress(m_hDbhHelp, "SymGetSearchPath");
  
          if (pSC == NULL || pSFTA == NULL || pSGMB == NULL || pSGMI == NULL || pSGO == NULL ||
              pSGSFA == NULL || pSI == NULL || pSSO == NULL || pSW == NULL || pUDSN == NULL ||
              pSLM == NULL)
          {
              FreeLibrary(m_hDbhHelp);
              m_hDbhHelp = NULL;
              pSC = NULL;
              return FALSE;
          }
  
          // SymInitialize
          if (szSymPath != NULL)
              m_szSymPath = _strdup(szSymPath);
          if (this->pSI(m_hProcess, m_szSymPath, FALSE) == FALSE)
              this->m_parent->OnDbgHelpErr("SymInitialize", GetLastError(), 0);
  
          DWORD symOptions = this->pSGO(); // SymGetOptions
          symOptions |= SYMOPT_LOAD_LINES;
          symOptions |= SYMOPT_FAIL_CRITICAL_ERRORS;
          //symOptions |= SYMOPT_NO_PROMPTS;
          // SymSetOptions
          symOptions = this->pSSO(symOptions);
  
          char buf[StackWalker::STACKWALK_MAX_NAMELEN] = { 0 };
          if (this->pSGSP != NULL)
          {
              if (this->pSGSP(m_hProcess, buf, StackWalker::STACKWALK_MAX_NAMELEN) == FALSE)
                  this->m_parent->OnDbgHelpErr("SymGetSearchPath", GetLastError(), 0);
          }
          char  szUserName[1024] = { 0 };
          DWORD dwSize = 1024;
          GetUserNameA(szUserName, &dwSize);
          this->m_parent->OnSymInit(buf, symOptions, szUserName);
  
          return TRUE;
      }
  
      StackWalker* m_parent;
  
      HMODULE m_hDbhHelp;
      HANDLE  m_hProcess;
      LPSTR   m_szSymPath;
  
  #pragma pack(push, 8)
      typedef struct IMAGEHLP_MODULE64_V3
      {
          DWORD    SizeOfStruct;         // set to sizeof(IMAGEHLP_MODULE64)
          DWORD64  BaseOfImage;          // base load address of module
          DWORD    ImageSize;            // virtual size of the loaded module
          DWORD    TimeDateStamp;        // date/time stamp from pe header
          DWORD    CheckSum;             // checksum from the pe header
          DWORD    NumSyms;              // number of symbols in the symbol table
          SYM_TYPE SymType;              // type of symbols loaded
          CHAR     ModuleName[32];       // module name
          CHAR     ImageName[256];       // image name
          CHAR     LoadedImageName[256]; // symbol file name
          // new elements: 07-Jun-2002
          CHAR  LoadedPdbName[256];   // pdb file name
          DWORD CVSig;                // Signature of the CV record in the debug directories
          CHAR  CVData[MAX_PATH * 3]; // Contents of the CV record
          DWORD PdbSig;               // Signature of PDB
          GUID  PdbSig70;             // Signature of PDB (VC 7 and up)
          DWORD PdbAge;               // DBI age of pdb
          BOOL  PdbUnmatched;         // loaded an unmatched pdb
          BOOL  DbgUnmatched;         // loaded an unmatched dbg
          BOOL  LineNumbers;          // we have line number information
          BOOL  GlobalSymbols;        // we have internal symbol information
          BOOL  TypeInfo;             // we have type information
          // new elements: 17-Dec-2003
          BOOL SourceIndexed; // pdb supports source server
          BOOL Publics;       // contains public symbols
      };
  
      typedef struct IMAGEHLP_MODULE64_V2
      {
          DWORD    SizeOfStruct;         // set to sizeof(IMAGEHLP_MODULE64)
          DWORD64  BaseOfImage;          // base load address of module
          DWORD    ImageSize;            // virtual size of the loaded module
          DWORD    TimeDateStamp;        // date/time stamp from pe header
          DWORD    CheckSum;             // checksum from the pe header
          DWORD    NumSyms;              // number of symbols in the symbol table
          SYM_TYPE SymType;              // type of symbols loaded
          CHAR     ModuleName[32];       // module name
          CHAR     ImageName[256];       // image name
          CHAR     LoadedImageName[256]; // symbol file name
      };
  #pragma pack(pop)
  
      // SymCleanup()
      typedef BOOL(__stdcall* tSC)(IN HANDLE hProcess);
      tSC pSC;
  
      // SymFunctionTableAccess64()
      typedef PVOID(__stdcall* tSFTA)(HANDLE hProcess, DWORD64 AddrBase);
      tSFTA pSFTA;
  
      // SymGetLineFromAddr64()
      typedef BOOL(__stdcall* tSGLFA)(IN HANDLE hProcess,
          IN DWORD64 dwAddr,
          OUT PDWORD pdwDisplacement,
          OUT PIMAGEHLP_LINE64 Line);
      tSGLFA pSGLFA;
  
      // SymGetModuleBase64()
      typedef DWORD64(__stdcall* tSGMB)(IN HANDLE hProcess, IN DWORD64 dwAddr);
      tSGMB pSGMB;
  
      // SymGetModuleInfo64()
      typedef BOOL(__stdcall* tSGMI)(IN HANDLE hProcess,
          IN DWORD64 dwAddr,
          OUT IMAGEHLP_MODULE64_V3* ModuleInfo);
      tSGMI pSGMI;
  
      // SymGetOptions()
      typedef DWORD(__stdcall* tSGO)(VOID);
      tSGO pSGO;
  
      // SymGetSymFromAddr64()
      typedef BOOL(__stdcall* tSGSFA)(IN HANDLE hProcess,
          IN DWORD64 dwAddr,
          OUT PDWORD64 pdwDisplacement,
          OUT PIMAGEHLP_SYMBOL64 Symbol);
      tSGSFA pSGSFA;
  
      // SymInitialize()
      typedef BOOL(__stdcall* tSI)(IN HANDLE hProcess, IN PSTR UserSearchPath, IN BOOL fInvadeProcess);
      tSI pSI;
  
      // SymLoadModule64()
      typedef DWORD64(__stdcall* tSLM)(IN HANDLE hProcess,
          IN HANDLE hFile,
          IN PSTR ImageName,
          IN PSTR ModuleName,
          IN DWORD64 BaseOfDll,
          IN DWORD SizeOfDll);
      tSLM pSLM;
  
      // SymSetOptions()
      typedef DWORD(__stdcall* tSSO)(IN DWORD SymOptions);
      tSSO pSSO;
  
      // StackWalk64()
      typedef BOOL(__stdcall* tSW)(DWORD                            MachineType,
          HANDLE                           hProcess,
          HANDLE                           hThread,
          LPSTACKFRAME64                   StackFrame,
          PVOID                            ContextRecord,
          PREAD_PROCESS_MEMORY_ROUTINE64   ReadMemoryRoutine,
          PFUNCTION_TABLE_ACCESS_ROUTINE64 FunctionTableAccessRoutine,
          PGET_MODULE_BASE_ROUTINE64       GetModuleBaseRoutine,
          PTRANSLATE_ADDRESS_ROUTINE64     TranslateAddress);
      tSW pSW;
  
      // UnDecorateSymbolName()
      typedef DWORD(__stdcall WINAPI* tUDSN)(PCSTR DecoratedName,
          PSTR  UnDecoratedName,
          DWORD UndecoratedLength,
          DWORD Flags);
      tUDSN pUDSN;
  
      typedef BOOL(__stdcall WINAPI* tSGSP)(HANDLE hProcess, PSTR SearchPath, DWORD SearchPathLength);
      tSGSP pSGSP;
  
  private:
      // **************************************** ToolHelp32 ************************
  #define MAX_MODULE_NAME32 255
  #define TH32CS_SNAPMODULE 0x00000008
  #pragma pack(push, 8)
      typedef struct tagMODULEENTRY32
      {
          DWORD   dwSize;
          DWORD   th32ModuleID;  // This module
          DWORD   th32ProcessID; // owning process
          DWORD   GlblcntUsage;  // Global usage count on the module
          DWORD   ProccntUsage;  // Module usage count in th32ProcessID's context
          BYTE* modBaseAddr;   // Base address of module in th32ProcessID's context
          DWORD   modBaseSize;   // Size in bytes of module starting at modBaseAddr
          HMODULE hModule;       // The hModule of this module in th32ProcessID's context
          char    szModule[MAX_MODULE_NAME32 + 1];
          char    szExePath[MAX_PATH];
      } MODULEENTRY32;
      typedef MODULEENTRY32* PMODULEENTRY32;
      typedef MODULEENTRY32* LPMODULEENTRY32;
  #pragma pack(pop)
  
      BOOL GetModuleListTH32(HANDLE hProcess, DWORD pid)
      {
          // CreateToolhelp32Snapshot()
          typedef HANDLE(__stdcall* tCT32S)(DWORD dwFlags, DWORD th32ProcessID);
          // Module32First()
          typedef BOOL(__stdcall* tM32F)(HANDLE hSnapshot, LPMODULEENTRY32 lpme);
          // Module32Next()
          typedef BOOL(__stdcall* tM32N)(HANDLE hSnapshot, LPMODULEENTRY32 lpme);
  
          // try both dlls...
          const TCHAR* dllname[] = { _T("kernel32.dll"), _T("tlhelp32.dll") };
          HINSTANCE    hToolhelp = NULL;
          tCT32S       pCT32S = NULL;
          tM32F        pM32F = NULL;
          tM32N        pM32N = NULL;
  
          HANDLE        hSnap;
          MODULEENTRY32 me;
          me.dwSize = sizeof(me);
          BOOL   keepGoing;
          size_t i;
  
          for (i = 0; i < (sizeof(dllname) / sizeof(dllname[0])); i++)
          {
              hToolhelp = LoadLibrary(dllname[i]);
              if (hToolhelp == NULL)
                  continue;
              pCT32S = (tCT32S)GetProcAddress(hToolhelp, "CreateToolhelp32Snapshot");
              pM32F = (tM32F)GetProcAddress(hToolhelp, "Module32First");
              pM32N = (tM32N)GetProcAddress(hToolhelp, "Module32Next");
              if ((pCT32S != NULL) && (pM32F != NULL) && (pM32N != NULL))
                  break; // found the functions!
              FreeLibrary(hToolhelp);
              hToolhelp = NULL;
          }
  
          if (hToolhelp == NULL)
              return FALSE;
  
          hSnap = pCT32S(TH32CS_SNAPMODULE, pid);
          if (hSnap == (HANDLE)-1)
          {
              FreeLibrary(hToolhelp);
              return FALSE;
          }
  
          keepGoing = !!pM32F(hSnap, &me);
          int cnt = 0;
          while (keepGoing)
          {
              this->LoadModule(hProcess, me.szExePath, me.szModule, (DWORD64)me.modBaseAddr,
                  me.modBaseSize);
              cnt++;
              keepGoing = !!pM32N(hSnap, &me);
          }
          CloseHandle(hSnap);
          FreeLibrary(hToolhelp);
          if (cnt <= 0)
              return FALSE;
          return TRUE;
      } // GetModuleListTH32
  
      // **************************************** PSAPI ************************
      typedef struct _MODULEINFO
      {
          LPVOID lpBaseOfDll;
          DWORD  SizeOfImage;
          LPVOID EntryPoint;
      } MODULEINFO, * LPMODULEINFO;
  
      BOOL GetModuleListPSAPI(HANDLE hProcess)
      {
          // EnumProcessModules()
          typedef BOOL(__stdcall* tEPM)(HANDLE hProcess, HMODULE* lphModule, DWORD cb,
              LPDWORD lpcbNeeded);
          // GetModuleFileNameEx()
          typedef DWORD(__stdcall* tGMFNE)(HANDLE hProcess, HMODULE hModule, LPSTR lpFilename,
              DWORD nSize);
          // GetModuleBaseName()
          typedef DWORD(__stdcall* tGMBN)(HANDLE hProcess, HMODULE hModule, LPSTR lpFilename,
              DWORD nSize);
          // GetModuleInformation()
          typedef BOOL(__stdcall* tGMI)(HANDLE hProcess, HMODULE hModule, LPMODULEINFO pmi, DWORD nSize);
  
          HINSTANCE hPsapi;
          tEPM      pEPM;
          tGMFNE    pGMFNE;
          tGMBN     pGMBN;
          tGMI      pGMI;
  
          DWORD i;
          //ModuleEntry e;
          DWORD        cbNeeded;
          MODULEINFO   mi;
          HMODULE* hMods = 0;
          char* tt = NULL;
          char* tt2 = NULL;
          const SIZE_T TTBUFLEN = 8096;
          int          cnt = 0;
  
          hPsapi = LoadLibrary(_T("psapi.dll"));
          if (hPsapi == NULL)
              return FALSE;
  
          pEPM = (tEPM)GetProcAddress(hPsapi, "EnumProcessModules");
          pGMFNE = (tGMFNE)GetProcAddress(hPsapi, "GetModuleFileNameExA");
          pGMBN = (tGMFNE)GetProcAddress(hPsapi, "GetModuleBaseNameA");
          pGMI = (tGMI)GetProcAddress(hPsapi, "GetModuleInformation");
          if ((pEPM == NULL) || (pGMFNE == NULL) || (pGMBN == NULL) || (pGMI == NULL))
          {
              // we couldn't find all functions
              FreeLibrary(hPsapi);
              return FALSE;
          }
  
          hMods = (HMODULE*)malloc(sizeof(HMODULE) * (TTBUFLEN / sizeof(HMODULE)));
          tt = (char*)malloc(sizeof(char) * TTBUFLEN);
          tt2 = (char*)malloc(sizeof(char) * TTBUFLEN);
          if ((hMods == NULL) || (tt == NULL) || (tt2 == NULL))
              goto cleanup;
  
          if (!pEPM(hProcess, hMods, TTBUFLEN, &cbNeeded))
          {
              //_ftprintf(fLogFile, _T("%lu: EPM failed, GetLastError = %lu\n"), g_dwShowCount, gle );
              goto cleanup;
          }
  
          if (cbNeeded > TTBUFLEN)
          {
              //_ftprintf(fLogFile, _T("%lu: More than %lu module handles. Huh?\n"), g_dwShowCount, lenof( hMods ) );
              goto cleanup;
          }
  
          for (i = 0; i < cbNeeded / sizeof(hMods[0]); i++)
          {
              // base address, size
              pGMI(hProcess, hMods[i], &mi, sizeof(mi));
              // image file name
              tt[0] = 0;
              pGMFNE(hProcess, hMods[i], tt, TTBUFLEN);
              // module name
              tt2[0] = 0;
              pGMBN(hProcess, hMods[i], tt2, TTBUFLEN);
  
              DWORD dwRes = this->LoadModule(hProcess, tt, tt2, (DWORD64)mi.lpBaseOfDll, mi.SizeOfImage);
              if (dwRes != ERROR_SUCCESS)
                  this->m_parent->OnDbgHelpErr("LoadModule", dwRes, 0);
              cnt++;
          }
  
      cleanup:
          if (hPsapi != NULL)
              FreeLibrary(hPsapi);
          if (tt2 != NULL)
              free(tt2);
          if (tt != NULL)
              free(tt);
          if (hMods != NULL)
              free(hMods);
  
          return cnt != 0;
      } // GetModuleListPSAPI
  
      DWORD LoadModule(HANDLE hProcess, LPCSTR img, LPCSTR mod, DWORD64 baseAddr, DWORD size)
      {
          CHAR* szImg = _strdup(img);
          CHAR* szMod = _strdup(mod);
          DWORD result = ERROR_SUCCESS;
          if ((szImg == NULL) || (szMod == NULL))
              result = ERROR_NOT_ENOUGH_MEMORY;
          else
          {
              if (pSLM(hProcess, 0, szImg, szMod, baseAddr, size) == 0)
                  result = GetLastError();
          }
          ULONGLONG fileVersion = 0;
          if ((m_parent != NULL) && (szImg != NULL))
          {
              // try to retrieve the file-version:
              if ((this->m_parent->m_options & StackWalker::RetrieveFileVersion) != 0)
              {
                  VS_FIXEDFILEINFO* fInfo = NULL;
                  DWORD             dwHandle;
                  DWORD             dwSize = GetFileVersionInfoSizeA(szImg, &dwHandle);
                  if (dwSize > 0)
                  {
                      LPVOID vData = malloc(dwSize);
                      if (vData != NULL)
                      {
                          if (GetFileVersionInfoA(szImg, 0, dwSize, vData) != 0)
                          {
                              UINT  len;
                              TCHAR szSubBlock[] = _T("\\");
                              if (SKSE::WinAPI::CLSSEVerQueryValue(vData, szSubBlock, (LPVOID*)&fInfo, &len) == 0)
                                  fInfo = NULL;
                              else
                              {
                                  fileVersion =
                                      ((ULONGLONG)fInfo->dwFileVersionLS) + ((ULONGLONG)fInfo->dwFileVersionMS << 32);
                              }
                          }
                          free(vData);
                      }
                  }
              }
  
              // Retrieve some additional-infos about the module
              IMAGEHLP_MODULE64_V3 Module;
              const char* szSymType = "-unknown-";
              if (this->GetModuleInfo(hProcess, baseAddr, &Module) != FALSE)
              {
                  switch (Module.SymType)
                  {
                  case SymNone:
                      szSymType = "-nosymbols-";
                      break;
                  case SymCoff: // 1
                      szSymType = "COFF";
                      break;
                  case SymCv: // 2
                      szSymType = "CV";
                      break;
                  case SymPdb: // 3
                      szSymType = "PDB";
                      break;
                  case SymExport: // 4
                      szSymType = "-exported-";
                      break;
                  case SymDeferred: // 5
                      szSymType = "-deferred-";
                      break;
                  case SymSym: // 6
                      szSymType = "SYM";
                      break;
                  case 7: // SymDia:
                      szSymType = "DIA";
                      break;
                  case 8: //SymVirtual:
                      szSymType = "Virtual";
                      break;
                  }
              }
              LPCSTR pdbName = Module.LoadedImageName;
              if (Module.LoadedPdbName[0] != 0)
                  pdbName = Module.LoadedPdbName;
              this->m_parent->OnLoadModule(img, mod, baseAddr, size, result, szSymType, pdbName,
                  fileVersion);
          }
          if (szImg != NULL)
              free(szImg);
          if (szMod != NULL)
              free(szMod);
          return result;
      }
  
  public:
      BOOL LoadModules(HANDLE hProcess, DWORD dwProcessId)
      {
          // first try toolhelp32
          if (GetModuleListTH32(hProcess, dwProcessId))
              return true;
          // then try psapi
          return GetModuleListPSAPI(hProcess);
      }
  
      BOOL GetModuleInfo(HANDLE hProcess, DWORD64 baseAddr, IMAGEHLP_MODULE64_V3* pModuleInfo)
      {
          memset(pModuleInfo, 0, sizeof(IMAGEHLP_MODULE64_V3));
          if (this->pSGMI == NULL)
          {
              SetLastError(ERROR_DLL_INIT_FAILED);
              return FALSE;
          }
          // First try to use the larger ModuleInfo-Structure
          pModuleInfo->SizeOfStruct = sizeof(IMAGEHLP_MODULE64_V3);
          void* pData = malloc(
              4096); // reserve enough memory, so the bug in v6.3.5.1 does not lead to memory-overwrites...
          if (pData == NULL)
          {
              SetLastError(ERROR_NOT_ENOUGH_MEMORY);
              return FALSE;
          }
          memcpy(pData, pModuleInfo, sizeof(IMAGEHLP_MODULE64_V3));
          static bool s_useV3Version = true;
          if (s_useV3Version)
          {
              if (this->pSGMI(hProcess, baseAddr, (IMAGEHLP_MODULE64_V3*)pData) != FALSE)
              {
                  // only copy as much memory as is reserved...
                  memcpy(pModuleInfo, pData, sizeof(IMAGEHLP_MODULE64_V3));
                  pModuleInfo->SizeOfStruct = sizeof(IMAGEHLP_MODULE64_V3);
                  free(pData);
                  return TRUE;
              }
              s_useV3Version = false; // to prevent unnecessary calls with the larger struct...
          }
  
          // could not retrieve the bigger structure, try with the smaller one (as defined in VC7.1)...
          pModuleInfo->SizeOfStruct = sizeof(IMAGEHLP_MODULE64_V2);
          memcpy(pData, pModuleInfo, sizeof(IMAGEHLP_MODULE64_V2));
          if (this->pSGMI(hProcess, baseAddr, (IMAGEHLP_MODULE64_V3*)pData) != FALSE)
          {
              // only copy as much memory as is reserved...
              memcpy(pModuleInfo, pData, sizeof(IMAGEHLP_MODULE64_V2));
              pModuleInfo->SizeOfStruct = sizeof(IMAGEHLP_MODULE64_V2);
              free(pData);
              return TRUE;
          }
          free(pData);
          SetLastError(ERROR_DLL_INIT_FAILED);
          return FALSE;
      }
  };
  
  // #############################################################
  StackWalker::StackWalker(DWORD dwProcessId, HANDLE hProcess)
  {
      this->m_options = OptionsAll;
      this->m_modulesLoaded = FALSE;
      this->m_hProcess = hProcess;
      this->m_sw = new StackWalkerInternal(this, this->m_hProcess);
      this->m_dwProcessId = dwProcessId;
      this->m_szSymPath = NULL;
      this->m_MaxRecursionCount = 1000;
  }
  StackWalker::StackWalker(int options, LPCSTR szSymPath, DWORD dwProcessId, HANDLE hProcess)
  {
      this->m_options = options;
      this->m_modulesLoaded = FALSE;
      this->m_hProcess = hProcess;
      this->m_sw = new StackWalkerInternal(this, this->m_hProcess);
      this->m_dwProcessId = dwProcessId;
      if (szSymPath != NULL)
      {
          this->m_szSymPath = _strdup(szSymPath);
          this->m_options |= SymBuildPath;
      }
      else
          this->m_szSymPath = NULL;
      this->m_MaxRecursionCount = 1000;
  }
  
  StackWalker::~StackWalker()
  {
      if (m_szSymPath != NULL)
          free(m_szSymPath);
      m_szSymPath = NULL;
      if (this->m_sw != NULL)
          delete this->m_sw;
      this->m_sw = NULL;
  }
  
  BOOL StackWalker::LoadModules()
  {
      if (this->m_sw == NULL)
      {
          SetLastError(ERROR_DLL_INIT_FAILED);
          return FALSE;
      }
      if (m_modulesLoaded != FALSE)
          return TRUE;
  
      // Build the sym-path:
      char* szSymPath = NULL;
      if ((this->m_options & SymBuildPath) != 0)
      {
          const size_t nSymPathLen = 4096;
          szSymPath = (char*)malloc(nSymPathLen);
          if (szSymPath == NULL)
          {
              SetLastError(ERROR_NOT_ENOUGH_MEMORY);
              return FALSE;
          }
          szSymPath[0] = 0;
          // Now first add the (optional) provided sympath:
          if (this->m_szSymPath != NULL)
          {
              strcat_s(szSymPath, nSymPathLen, this->m_szSymPath);
              strcat_s(szSymPath, nSymPathLen, ";");
          }
  
          strcat_s(szSymPath, nSymPathLen, ".;");
  
          const size_t nTempLen = 1024;
          char         szTemp[nTempLen];
          // Now add the current directory:
          if (GetCurrentDirectoryA(nTempLen, szTemp) > 0)
          {
              szTemp[nTempLen - 1] = 0;
              strcat_s(szSymPath, nSymPathLen, szTemp);
              strcat_s(szSymPath, nSymPathLen, ";");
          }
  
          // Now add the path for the main-module:
          if (SKSE::WinAPI::CLSSEGetModuleFileName(NULL, szTemp, nTempLen) > 0)
          {
              szTemp[nTempLen - 1] = 0;
              for (char* p = (szTemp + strlen(szTemp) - 1); p >= szTemp; --p)
              {
                  // locate the rightmost path separator
                  if ((*p == '\\') || (*p == '/') || (*p == ':'))
                  {
                      *p = 0;
                      break;
                  }
              } // for (search for path separator...)
              if (strlen(szTemp) > 0)
              {
                  strcat_s(szSymPath, nSymPathLen, szTemp);
                  strcat_s(szSymPath, nSymPathLen, ";");
              }
          }
          if (SKSE::WinAPI::CLSSEGetEnvironmentVariable("_NT_SYMBOL_PATH", szTemp, nTempLen) > 0)
          {
              szTemp[nTempLen - 1] = 0;
              strcat_s(szSymPath, nSymPathLen, szTemp);
              strcat_s(szSymPath, nSymPathLen, ";");
          }
          if (SKSE::WinAPI::CLSSEGetEnvironmentVariable("_NT_ALTERNATE_SYMBOL_PATH", szTemp, nTempLen) > 0)
          {
              szTemp[nTempLen - 1] = 0;
              strcat_s(szSymPath, nSymPathLen, szTemp);
              strcat_s(szSymPath, nSymPathLen, ";");
          }
          if (SKSE::WinAPI::CLSSEGetEnvironmentVariable("SYSTEMROOT", szTemp, nTempLen) > 0)
          {
              szTemp[nTempLen - 1] = 0;
              strcat_s(szSymPath, nSymPathLen, szTemp);
              strcat_s(szSymPath, nSymPathLen, ";");
              // also add the "system32"-directory:
              strcat_s(szTemp, nTempLen, "\\system32");
              strcat_s(szSymPath, nSymPathLen, szTemp);
              strcat_s(szSymPath, nSymPathLen, ";");
          }
  
          if ((this->m_options & SymUseSymSrv) != 0)
          {
              if (SKSE::WinAPI::CLSSEGetEnvironmentVariable("SYSTEMDRIVE", szTemp, nTempLen) > 0)
              {
                  szTemp[nTempLen - 1] = 0;
                  strcat_s(szSymPath, nSymPathLen, "SRV*");
                  strcat_s(szSymPath, nSymPathLen, szTemp);
                  strcat_s(szSymPath, nSymPathLen, "\\websymbols");
                  strcat_s(szSymPath, nSymPathLen, "*http://msdl.microsoft.com/download/symbols;");
              }
              else
                  strcat_s(szSymPath, nSymPathLen,
                      "SRV*c:\\websymbols*http://msdl.microsoft.com/download/symbols;");
          }
      } // if SymBuildPath
  
      // First Init the whole stuff...
      BOOL bRet = this->m_sw->Init(szSymPath);
      if (szSymPath != NULL)
          free(szSymPath);
      szSymPath = NULL;
      if (bRet == FALSE)
      {
          this->OnDbgHelpErr("Error while initializing dbghelp.dll", 0, 0);
          SetLastError(ERROR_DLL_INIT_FAILED);
          return FALSE;
      }
  
      bRet = this->m_sw->LoadModules(this->m_hProcess, this->m_dwProcessId);
      if (bRet != FALSE)
          m_modulesLoaded = TRUE;
      return bRet;
  }
  
  // The following is used to pass the "userData"-Pointer to the user-provided readMemoryFunction
  // This has to be done due to a problem with the "hProcess"-parameter in x64...
  // Because this class is in no case multi-threading-enabled (because of the limitations
  // of dbghelp.dll) it is "safe" to use a static-variable
  static StackWalker::PReadProcessMemoryRoutine s_readMemoryFunction = NULL;
  static LPVOID                                 s_readMemoryFunction_UserData = NULL;
  
  BOOL StackWalker::ShowCallstack(HANDLE                    hThread,
      const CONTEXT* context,
      PReadProcessMemoryRoutine readMemoryFunction,
      LPVOID                    pUserData)
  {
      CONTEXT                                   c;
      CallstackEntry                            csEntry;
      IMAGEHLP_SYMBOL64* pSym = NULL;
      StackWalkerInternal::IMAGEHLP_MODULE64_V3 Module;
      IMAGEHLP_LINE64                           Line;
      int                                       frameNum;
      bool                                      bLastEntryCalled = true;
      int                                       curRecursionCount = 0;
  
      if (m_modulesLoaded == FALSE)
          this->LoadModules(); // ignore the result...
  
      if (this->m_sw->m_hDbhHelp == NULL)
      {
          SetLastError(ERROR_DLL_INIT_FAILED);
          return FALSE;
      }
  
      s_readMemoryFunction = readMemoryFunction;
      s_readMemoryFunction_UserData = pUserData;
  
      if (context == NULL)
      {
          // If no context is provided, capture the context
          // See: https://stackwalker.codeplex.com/discussions/446958
  #if _WIN32_WINNT <= 0x0501
      // If we need to support XP, we need to use the "old way", because "GetThreadId" is not available!
          if (hThread == GetCurrentThread())
  #else
          if (GetThreadId(hThread) == GetCurrentThreadId())
  #endif
          {
              GET_CURRENT_CONTEXT_STACKWALKER_CODEPLEX(c, USED_CONTEXT_FLAGS);
          }
          else
          {
              SuspendThread(hThread);
              memset(&c, 0, sizeof(CONTEXT));
              c.ContextFlags = USED_CONTEXT_FLAGS;
  
              // TODO: Detect if you want to get a thread context of a different process, which is running a different processor architecture...
              // This does only work if we are x64 and the target process is x64 or x86;
              // It cannot work, if this process is x64 and the target process is x64... this is not supported...
              // See also: http://www.howzatt.demon.co.uk/articles/DebuggingInWin64.html
              if (GetThreadContext(hThread, &c) == FALSE)
              {
                  ResumeThread(hThread);
                  return FALSE;
              }
          }
      }
      else
          c = *context;
  
      // init STACKFRAME for first call
      STACKFRAME64 s; // in/out stackframe
      memset(&s, 0, sizeof(s));
      DWORD imageType;
  #ifdef _M_IX86
      // normally, call ImageNtHeader() and use machine info from PE header
      imageType = IMAGE_FILE_MACHINE_I386;
      s.AddrPC.Offset = c.Eip;
      s.AddrPC.Mode = AddrModeFlat;
      s.AddrFrame.Offset = c.Ebp;
      s.AddrFrame.Mode = AddrModeFlat;
      s.AddrStack.Offset = c.Esp;
      s.AddrStack.Mode = AddrModeFlat;
  #elif _M_X64
      imageType = IMAGE_FILE_MACHINE_AMD64;
      s.AddrPC.Offset = c.Rip;
      s.AddrPC.Mode = AddrModeFlat;
      s.AddrFrame.Offset = c.Rsp;
      s.AddrFrame.Mode = AddrModeFlat;
      s.AddrStack.Offset = c.Rsp;
      s.AddrStack.Mode = AddrModeFlat;
  #elif _M_IA64
      imageType = IMAGE_FILE_MACHINE_IA64;
      s.AddrPC.Offset = c.StIIP;
      s.AddrPC.Mode = AddrModeFlat;
      s.AddrFrame.Offset = c.IntSp;
      s.AddrFrame.Mode = AddrModeFlat;
      s.AddrBStore.Offset = c.RsBSP;
      s.AddrBStore.Mode = AddrModeFlat;
      s.AddrStack.Offset = c.IntSp;
      s.AddrStack.Mode = AddrModeFlat;
  #else
  #error "Platform not supported!"
  #endif
  
      pSym = (IMAGEHLP_SYMBOL64*)malloc(sizeof(IMAGEHLP_SYMBOL64) + STACKWALK_MAX_NAMELEN);
      if (!pSym)
          goto cleanup; // not enough memory...
      memset(pSym, 0, sizeof(IMAGEHLP_SYMBOL64) + STACKWALK_MAX_NAMELEN);
      pSym->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
      pSym->MaxNameLength = STACKWALK_MAX_NAMELEN;
  
      memset(&Line, 0, sizeof(Line));
      Line.SizeOfStruct = sizeof(Line);
  
      memset(&Module, 0, sizeof(Module));
      Module.SizeOfStruct = sizeof(Module);
  
      for (frameNum = 0;; ++frameNum)
      {
          // get next stack frame (StackWalk64(), SymFunctionTableAccess64(), SymGetModuleBase64())
          // if this returns ERROR_INVALID_ADDRESS (487) or ERROR_NOACCESS (998), you can
          // assume that either you are done, or that the stack is so hosed that the next
          // deeper frame could not be found.
          // CONTEXT need not to be supplied if imageTyp is IMAGE_FILE_MACHINE_I386!
          if (!this->m_sw->pSW(imageType, this->m_hProcess, hThread, &s, &c, myReadProcMem,
              this->m_sw->pSFTA, this->m_sw->pSGMB, NULL))
          {
              // INFO: "StackWalk64" does not set "GetLastError"...
              this->OnDbgHelpErr("StackWalk64", 0, s.AddrPC.Offset);
              break;
          }
  
          csEntry.offset = s.AddrPC.Offset;
          csEntry.name[0] = 0;
          csEntry.undName[0] = 0;
          csEntry.undFullName[0] = 0;
          csEntry.offsetFromSmybol = 0;
          csEntry.offsetFromLine = 0;
          csEntry.lineFileName[0] = 0;
          csEntry.lineNumber = 0;
          csEntry.loadedImageName[0] = 0;
          csEntry.moduleName[0] = 0;
          if (s.AddrPC.Offset == s.AddrReturn.Offset)
          {
              if ((this->m_MaxRecursionCount > 0) && (curRecursionCount > m_MaxRecursionCount))
              {
                  this->OnDbgHelpErr("StackWalk64-Endless-Callstack!", 0, s.AddrPC.Offset);
                  break;
              }
              curRecursionCount++;
          }
          else
              curRecursionCount = 0;
          if (s.AddrPC.Offset != 0)
          {
              // we seem to have a valid PC
              // show procedure info (SymGetSymFromAddr64())
              if (this->m_sw->pSGSFA(this->m_hProcess, s.AddrPC.Offset, &(csEntry.offsetFromSmybol),
                  pSym) != FALSE)
              {
                  MyStrCpy(csEntry.name, STACKWALK_MAX_NAMELEN, pSym->Name);
                  // UnDecorateSymbolName()
                  this->m_sw->pUDSN(pSym->Name, csEntry.undName, STACKWALK_MAX_NAMELEN, UNDNAME_NAME_ONLY);
                  this->m_sw->pUDSN(pSym->Name, csEntry.undFullName, STACKWALK_MAX_NAMELEN, UNDNAME_COMPLETE);
              }
              else
              {
                  this->OnDbgHelpErr("SymGetSymFromAddr64", GetLastError(), s.AddrPC.Offset);
              }
  
              // show line number info, NT5.0-method (SymGetLineFromAddr64())
              if (this->m_sw->pSGLFA != NULL)
              { // yes, we have SymGetLineFromAddr64()
                  if (this->m_sw->pSGLFA(this->m_hProcess, s.AddrPC.Offset, &(csEntry.offsetFromLine),
                      &Line) != FALSE)
                  {
                      csEntry.lineNumber = Line.LineNumber;
                      MyStrCpy(csEntry.lineFileName, STACKWALK_MAX_NAMELEN, Line.FileName);
                  }
                  else
                  {
                      this->OnDbgHelpErr("SymGetLineFromAddr64", GetLastError(), s.AddrPC.Offset);
                  }
              } // yes, we have SymGetLineFromAddr64()
  
              // show module info (SymGetModuleInfo64())
              if (this->m_sw->GetModuleInfo(this->m_hProcess, s.AddrPC.Offset, &Module) != FALSE)
              { // got module info OK
                  switch (Module.SymType)
                  {
                  case SymNone:
                      csEntry.symTypeString = "-nosymbols-";
                      break;
                  case SymCoff:
                      csEntry.symTypeString = "COFF";
                      break;
                  case SymCv:
                      csEntry.symTypeString = "CV";
                      break;
                  case SymPdb:
                      csEntry.symTypeString = "PDB";
                      break;
                  case SymExport:
                      csEntry.symTypeString = "-exported-";
                      break;
                  case SymDeferred:
                      csEntry.symTypeString = "-deferred-";
                      break;
                  case SymSym:
                      csEntry.symTypeString = "SYM";
                      break;
  #if API_VERSION_NUMBER >= 9
                  case SymDia:
                      csEntry.symTypeString = "DIA";
                      break;
  #endif
                  case 8: //SymVirtual:
                      csEntry.symTypeString = "Virtual";
                      break;
                  default:
                      //_snprintf( ty, sizeof(ty), "symtype=%ld", (long) Module.SymType );
                      csEntry.symTypeString = NULL;
                      break;
                  }
  
                  MyStrCpy(csEntry.moduleName, STACKWALK_MAX_NAMELEN, Module.ModuleName);
                  csEntry.baseOfImage = Module.BaseOfImage;
                  MyStrCpy(csEntry.loadedImageName, STACKWALK_MAX_NAMELEN, Module.LoadedImageName);
              } // got module info OK
              else
              {
                  this->OnDbgHelpErr("SymGetModuleInfo64", GetLastError(), s.AddrPC.Offset);
              }
          } // we seem to have a valid PC
  
          CallstackEntryType et = CallstackEntryType::nextEntry;
          if (frameNum == 0)
              et = CallstackEntryType::firstEntry;
          bLastEntryCalled = false;
          this->OnCallstackEntry(et, csEntry);
  
          if (s.AddrReturn.Offset == 0)
          {
              bLastEntryCalled = true;
              this->OnCallstackEntry(CallstackEntryType::lastEntry, csEntry);
              SetLastError(ERROR_SUCCESS);
              break;
          }
      } // for ( frameNum )
  
  cleanup:
      if (pSym)
          free(pSym);
  
      if (bLastEntryCalled == false)
          this->OnCallstackEntry(CallstackEntryType::lastEntry, csEntry);
  
      if (context == NULL)
          ResumeThread(hThread);
  
      return TRUE;
  }
  
  BOOL StackWalker::ShowObject(LPVOID pObject)
  {
      // Load modules if not done yet
      if (m_modulesLoaded == FALSE)
          this->LoadModules(); // ignore the result...
  
        // Verify that the DebugHelp.dll was actually found
      if (this->m_sw->m_hDbhHelp == NULL)
      {
          SetLastError(ERROR_DLL_INIT_FAILED);
          return FALSE;
      }
  
      // SymGetSymFromAddr64() is required
      if (this->m_sw->pSGSFA == NULL)
          return FALSE;
  
      // Show object info (SymGetSymFromAddr64())
      DWORD64            dwAddress = DWORD64(pObject);
      DWORD64            dwDisplacement = 0;
      IMAGEHLP_SYMBOL64* pSym =
          (IMAGEHLP_SYMBOL64*)malloc(sizeof(IMAGEHLP_SYMBOL64) + STACKWALK_MAX_NAMELEN);
      if (!pSym)
  	{
  		this->OnDbgHelpErr("malloc", 0, dwAddress);
  		return FALSE;
  	}
      memset(pSym, 0, sizeof(IMAGEHLP_SYMBOL64) + STACKWALK_MAX_NAMELEN);
      pSym->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
      pSym->MaxNameLength = STACKWALK_MAX_NAMELEN;
      if (this->m_sw->pSGSFA(this->m_hProcess, dwAddress, &dwDisplacement, pSym) == FALSE)
      {
          this->OnDbgHelpErr("SymGetSymFromAddr64", GetLastError(), dwAddress);
          return FALSE;
      }
      // Object name output
      this->OnOutput(pSym->Name);
  
      free(pSym);
      return TRUE;
  };
  
  BOOL __stdcall StackWalker::myReadProcMem(HANDLE  hProcess,
      DWORD64 qwBaseAddress,
      PVOID   lpBuffer,
      DWORD   nSize,
      LPDWORD lpNumberOfBytesRead)
  {
      if (s_readMemoryFunction == NULL)
      {
          SIZE_T st;
          BOOL   bRet = ReadProcessMemory(hProcess, (LPVOID)qwBaseAddress, lpBuffer, nSize, &st);
          *lpNumberOfBytesRead = (DWORD)st;
          //printf("ReadMemory: hProcess: %p, baseAddr: %p, buffer: %p, size: %d, read: %d, result: %d\n", hProcess, (LPVOID) qwBaseAddress, lpBuffer, nSize, (DWORD) st, (DWORD) bRet);
          return bRet;
      }
      else
      {
          return s_readMemoryFunction(hProcess, qwBaseAddress, lpBuffer, nSize, lpNumberOfBytesRead,
              s_readMemoryFunction_UserData);
      }
  }
  
  void StackWalker::OnLoadModule(LPCSTR    img,
      LPCSTR    mod,
      DWORD64   baseAddr,
      DWORD     size,
      DWORD     result,
      LPCSTR    symType,
      LPCSTR    pdbName,
      ULONGLONG fileVersion)
  {
      CHAR   buffer[STACKWALK_MAX_NAMELEN];
      size_t maxLen = STACKWALK_MAX_NAMELEN;
  #if _MSC_VER >= 1400
      maxLen = _TRUNCATE;
  #endif
      if (fileVersion == 0)
          _snprintf_s(buffer, maxLen, "%s:%s (%p), size: %d (result: %d), SymType: '%s', PDB: '%s'\n",
              img, mod, (LPVOID)baseAddr, size, result, symType, pdbName);
      else
      {
          DWORD v4 = (DWORD)(fileVersion & 0xFFFF);
          DWORD v3 = (DWORD)((fileVersion >> 16) & 0xFFFF);
          DWORD v2 = (DWORD)((fileVersion >> 32) & 0xFFFF);
          DWORD v1 = (DWORD)((fileVersion >> 48) & 0xFFFF);
          _snprintf_s(
              buffer, maxLen,
              "%s:%s (%p), size: %d (result: %d), SymType: '%s', PDB: '%s', fileVersion: %d.%d.%d.%d\n",
              img, mod, (LPVOID)baseAddr, size, result, symType, pdbName, v1, v2, v3, v4);
      }
      buffer[STACKWALK_MAX_NAMELEN - 1] = 0; // be sure it is NULL terminated
      OnOutput(buffer);
  }
  
  void StackWalker::OnCallstackEntry(CallstackEntryType eType, CallstackEntry& entry)
  {
      CHAR   buffer[STACKWALK_MAX_NAMELEN];
      size_t maxLen = STACKWALK_MAX_NAMELEN;
  #if _MSC_VER >= 1400
      maxLen = _TRUNCATE;
  #endif
      if ((eType != CallstackEntryType::lastEntry) && (entry.offset != 0))
      {
          if (entry.name[0] == 0)
              MyStrCpy(entry.name, STACKWALK_MAX_NAMELEN, "(function-name not available)");
          if (entry.undName[0] != 0)
              MyStrCpy(entry.name, STACKWALK_MAX_NAMELEN, entry.undName);
          if (entry.undFullName[0] != 0)
              MyStrCpy(entry.name, STACKWALK_MAX_NAMELEN, entry.undFullName);
          if (entry.lineFileName[0] == 0)
          {
              MyStrCpy(entry.lineFileName, STACKWALK_MAX_NAMELEN, "(filename not available)");
              if (entry.moduleName[0] == 0)
                  MyStrCpy(entry.moduleName, STACKWALK_MAX_NAMELEN, "(module-name not available)");
              _snprintf_s(buffer, maxLen, "%p (%s): %s: %s\n", (LPVOID)entry.offset, entry.moduleName,
                  entry.lineFileName, entry.name);
          }
          else
              _snprintf_s(buffer, maxLen, "%s (%d): %s\n", entry.lineFileName, entry.lineNumber,
                  entry.name);
          buffer[STACKWALK_MAX_NAMELEN - 1] = 0;
          OnOutput(buffer);
      }
  }
  
  void StackWalker::OnDbgHelpErr(LPCSTR szFuncName, DWORD gle, DWORD64 addr)
  {
      CHAR   buffer[STACKWALK_MAX_NAMELEN];
      size_t maxLen = STACKWALK_MAX_NAMELEN;
  #if _MSC_VER >= 1400
      maxLen = _TRUNCATE;
  #endif
      _snprintf_s(buffer, maxLen, "ERROR: %s, GetLastError: %d (Address: %p)\n", szFuncName, gle,
          (LPVOID)addr);
      buffer[STACKWALK_MAX_NAMELEN - 1] = 0;
      OnOutput(buffer);
  }
  
  void StackWalker::OnSymInit(LPCSTR szSearchPath, DWORD symOptions, LPCSTR szUserName)
  {
      CHAR   buffer[STACKWALK_MAX_NAMELEN];
      size_t maxLen = STACKWALK_MAX_NAMELEN;
  #if _MSC_VER >= 1400
      maxLen = _TRUNCATE;
  #endif
      _snprintf_s(buffer, maxLen, "SymInit: Symbol-SearchPath: '%s', symOptions: %d, UserName: '%s'\n",
          szSearchPath, symOptions, szUserName);
      buffer[STACKWALK_MAX_NAMELEN - 1] = 0;
      OnOutput(buffer);
      // Also display the OS-version
  #if _MSC_VER <= 1200
      OSVERSIONINFOA ver;
      ZeroMemory(&ver, sizeof(OSVERSIONINFOA));
      ver.dwOSVersionInfoSize = sizeof(ver);
      if (GetVersionExA(&ver) != FALSE)
      {
          _snprintf_s(buffer, maxLen, "OS-Version: %d.%d.%d (%s)\n", ver.dwMajorVersion,
              ver.dwMinorVersion, ver.dwBuildNumber, ver.szCSDVersion);
          buffer[STACKWALK_MAX_NAMELEN - 1] = 0;
          OnOutput(buffer);
      }
  #else
      OSVERSIONINFOEXA ver;
      ZeroMemory(&ver, sizeof(OSVERSIONINFOEXA));
      ver.dwOSVersionInfoSize = sizeof(ver);
  #if _MSC_VER >= 1900
  #pragma warning(push)
  #pragma warning(disable : 4996)
  #endif
      if (GetVersionExA((OSVERSIONINFOA*)&ver) != FALSE)
      {
          _snprintf_s(buffer, maxLen, "OS-Version: %d.%d.%d (%s) 0x%x-0x%x\n", ver.dwMajorVersion,
              ver.dwMinorVersion, ver.dwBuildNumber, ver.szCSDVersion, ver.wSuiteMask,
              ver.wProductType);
          buffer[STACKWALK_MAX_NAMELEN - 1] = 0;
          OnOutput(buffer);
      }
  #if _MSC_VER >= 1900
  #pragma warning(pop)
  #endif
  #endif
  }
  
  void StackWalker::OnOutput(LPCSTR buffer)
  {
      OutputDebugStringA(buffer);
  }