kc3-lang/angle/util/windows/third_party/StackWalker/src/StackWalker.cpp

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• Hash : 2d0a9acb
  Author :
  Date : 2019-06-07T16:22:01
  

  Initialize STACKFRAME64 for ARM64
  
  Bug: chromium:972228,893460
  
  Change-Id: I0c77d19e70c337d70bc55f65f6893d5bbe18407b
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1648670
  Reviewed-by: Bruce Dawson <brucedawson@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• util/windows/third_party/StackWalker/src/StackWalker.cpp

• /**********************************************************************
   *
   * 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) && (GetEnvironmentVariable(_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) && (GetEnvironmentVariable(_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) && (GetEnvironmentVariable(_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, dwHandle, dwSize, vData) != 0)
              {
                UINT  len;
                TCHAR szSubBlock[] = _T("\\");
                if (VerQueryValue(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 (GetModuleFileNameA(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 (GetEnvironmentVariableA("_NT_SYMBOL_PATH", szTemp, nTempLen) > 0)
      {
        szTemp[nTempLen - 1] = 0;
        strcat_s(szSymPath, nSymPathLen, szTemp);
        strcat_s(szSymPath, nSymPathLen, ";");
      }
      if (GetEnvironmentVariableA("_NT_ALTERNATE_SYMBOL_PATH", szTemp, nTempLen) > 0)
      {
        szTemp[nTempLen - 1] = 0;
        strcat_s(szSymPath, nSymPathLen, szTemp);
        strcat_s(szSymPath, nSymPathLen, ";");
      }
      if (GetEnvironmentVariableA("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 (GetEnvironmentVariableA("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;
  #elif _M_ARM64
    imageType = IMAGE_FILE_MACHINE_ARM64;
    s.AddrPC.Offset = c.Pc;
    s.AddrPC.Mode = AddrModeFlat;
    s.AddrFrame.Offset = c.Fp;
    s.AddrFrame.Mode = AddrModeFlat;
    s.AddrStack.Offset = c.Sp;
    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 = nextEntry;
      if (frameNum == 0)
        et = firstEntry;
      bLastEntryCalled = false;
      this->OnCallstackEntry(et, csEntry);
  
      if (s.AddrReturn.Offset == 0)
      {
        bLastEntryCalled = true;
        this->OnCallstackEntry(lastEntry, csEntry);
        SetLastError(ERROR_SUCCESS);
        break;
      }
    } // for ( frameNum )
  
  cleanup:
    if (pSym)
      free(pSym);
  
    if (bLastEntryCalled == false)
      this->OnCallstackEntry(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);
    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 != 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);
  }
  

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