diff --git a/ThirdPartyNotices.txt b/ThirdPartyNotices.txt
index 64b34d2362..6bcca1af03 100644
--- a/ThirdPartyNotices.txt
+++ b/ThirdPartyNotices.txt
@@ -39,6 +39,7 @@ popper.js             wpiutil/src/main/native/resources/popper-*
 units                 wpiutil/src/main/native/include/units/units.h
 Eigen                 wpiutil/src/main/native/include/Eigen/
                       wpiutil/src/main/native/include/unsupported/
+StackWalker           wpiutil/src/main/native/windows/StackWalker.*
 
 
 ==============================================================================
@@ -746,3 +747,32 @@ Exhibit B - "Incompatible With Secondary Licenses" Notice
 
   This Source Code Form is "Incompatible With Secondary Licenses", as
   defined by the Mozilla Public License, v. 2.0.
+
+
+===================
+StackWalker License
+===================
+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.
diff --git a/wpilibc/src/main/native/cpp/Error.cpp b/wpilibc/src/main/native/cpp/Error.cpp
index f758032a36..ee7dcbd110 100644
--- a/wpilibc/src/main/native/cpp/Error.cpp
+++ b/wpilibc/src/main/native/cpp/Error.cpp
@@ -1,5 +1,5 @@
 /*----------------------------------------------------------------------------*/
-/* Copyright (c) 2008-2018 FIRST. All Rights Reserved.                        */
+/* Copyright (c) 2008-2019 FIRST. All Rights Reserved.                        */
 /* Open Source Software - may be modified and shared by FRC teams. The code   */
 /* must be accompanied by the FIRST BSD license file in the root directory of */
 /* the project.                                                               */
@@ -8,6 +8,7 @@
 #include "frc/Error.h"
 
 #include <wpi/Path.h>
+#include <wpi/StackTrace.h>
 
 #include "frc/DriverStation.h"
 #include "frc/Timer.h"
@@ -84,7 +85,7 @@ void Error::Report() {
       true, m_code, m_message,
       m_function + wpi::Twine(" [") + wpi::sys::path::filename(m_filename) +
           wpi::Twine(':') + wpi::Twine(m_lineNumber) + wpi::Twine(']'),
-      GetStackTrace(4));
+      wpi::GetStackTrace(4));
 }
 
 void Error::Clear() {
diff --git a/wpilibc/src/main/native/cpp/Utility.cpp b/wpilibc/src/main/native/cpp/Utility.cpp
index 5efe328333..499f9b4a70 100644
--- a/wpilibc/src/main/native/cpp/Utility.cpp
+++ b/wpilibc/src/main/native/cpp/Utility.cpp
@@ -20,6 +20,7 @@
 #include <hal/HAL.h>
 #include <wpi/Path.h>
 #include <wpi/SmallString.h>
+#include <wpi/StackTrace.h>
 #include <wpi/raw_ostream.h>
 
 #include "frc/ErrorBase.h"
@@ -47,7 +48,7 @@ bool wpi_assert_impl(bool conditionValue, const wpi::Twine& conditionText,
       errorStream << "failed: " << message << "\n";
     }
 
-    std::string stack = GetStackTrace(2);
+    std::string stack = wpi::GetStackTrace(2);
 
     // Print the error and send it to the DriverStation
     HAL_SendError(1, 1, 0, errorBuf.c_str(), locBuf.c_str(), stack.c_str(), 1);
@@ -86,7 +87,7 @@ void wpi_assertEqual_common_impl(const wpi::Twine& valueA,
     errorStream << "failed: " << message << "\n";
   }
 
-  std::string trace = GetStackTrace(3);
+  std::string trace = wpi::GetStackTrace(3);
 
   // Print the error and send it to the DriverStation
   HAL_SendError(1, 1, 0, errorBuf.c_str(), locBuf.c_str(), trace.c_str(), 1);
@@ -115,59 +116,3 @@ bool wpi_assertNotEqual_impl(int valueA, int valueB,
   }
   return valueA != valueB;
 }
-
-namespace frc {
-
-#ifndef _WIN32
-
-/**
- * Demangle a C++ symbol, used for printing stack traces.
- */
-static std::string demangle(char const* mangledSymbol) {
-  char buffer[256];
-  size_t length;
-  int32_t status;
-
-  if (std::sscanf(mangledSymbol, "%*[^(]%*[(]%255[^)+]", buffer)) {
-    char* symbol = abi::__cxa_demangle(buffer, nullptr, &length, &status);
-    if (status == 0) {
-      return symbol;
-    } else {
-      // If the symbol couldn't be demangled, it's probably a C function,
-      // so just return it as-is.
-      return buffer;
-    }
-  }
-
-  // If everything else failed, just return the mangled symbol
-  return mangledSymbol;
-}
-
-std::string GetStackTrace(int offset) {
-  void* stackTrace[128];
-  int stackSize = backtrace(stackTrace, 128);
-  char** mangledSymbols = backtrace_symbols(stackTrace, stackSize);
-  wpi::SmallString<1024> buf;
-  wpi::raw_svector_ostream trace(buf);
-
-  for (int i = offset; i < stackSize; i++) {
-    // Only print recursive functions once in a row.
-    if (i == 0 || stackTrace[i] != stackTrace[i - 1]) {
-      trace << "\tat " << demangle(mangledSymbols[i]) << "\n";
-    }
-  }
-
-  std::free(mangledSymbols);
-
-  return trace.str();
-}
-
-#else
-static std::string demangle(char const* mangledSymbol) {
-  return "no demangling on windows";
-}
-
-std::string GetStackTrace(int offset) { return "no stack trace on windows"; }
-#endif
-
-}  // namespace frc
diff --git a/wpilibc/src/main/native/include/frc/Utility.h b/wpilibc/src/main/native/include/frc/Utility.h
index 680acc1b73..3caaf84f87 100644
--- a/wpilibc/src/main/native/include/frc/Utility.h
+++ b/wpilibc/src/main/native/include/frc/Utility.h
@@ -71,14 +71,3 @@ bool wpi_assertNotEqual_impl(int valueA, int valueB,
                              const wpi::Twine& valueBString,
                              const wpi::Twine& message, wpi::StringRef fileName,
                              int lineNumber, wpi::StringRef funcName);
-
-namespace frc {
-
-/**
- * Get a stack trace, ignoring the first "offset" symbols.
- *
- * @param offset The number of symbols at the top of the stack to ignore
- */
-std::string GetStackTrace(int offset);
-
-}  // namespace frc
diff --git a/wpiutil/.styleguide b/wpiutil/.styleguide
index 0379c483c6..20306d8e2a 100644
--- a/wpiutil/.styleguide
+++ b/wpiutil/.styleguide
@@ -70,6 +70,7 @@ generatedFileExclude {
   src/main/native/resources/
   src/test/native/cpp/UnitsTest\.cpp$
   src/test/native/cpp/llvm/
+  src/main/native/windows/StackWalker
 }
 
 licenseUpdateExclude {
diff --git a/wpiutil/CMakeLists.txt b/wpiutil/CMakeLists.txt
index e08dca6128..52d5260579 100644
--- a/wpiutil/CMakeLists.txt
+++ b/wpiutil/CMakeLists.txt
@@ -63,6 +63,8 @@ endif()
 GENERATE_RESOURCES(src/main/native/resources generated/main/cpp WPI wpi wpiutil_resources_src)
 
 file(GLOB_RECURSE wpiutil_native_src src/main/native/cpp/*.cpp)
+file(GLOB_RECURSE wpiutil_unix_src src/main/native/unix/*.cpp)
+file(GLOB_RECURSE wpiutil_windows_src src/main/native/windows/*.cpp)
 
 file(GLOB uv_native_src src/main/native/libuv/src/*.cpp)
 
@@ -128,7 +130,7 @@ if (NOT USE_VCPKG_LIBUV)
                             $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src/main/native/libuv/include>
                             $<INSTALL_INTERFACE:${include_dest}/wpiutil>)
     if(NOT MSVC)
-        target_sources(wpiutil PRIVATE ${uv_unix_src})
+        target_sources(wpiutil PRIVATE ${wpiutil_unix_src} ${uv_unix_src})
         if (APPLE)
             target_sources(wpiutil PRIVATE ${uv_darwin_src})
         else()
@@ -136,7 +138,7 @@ if (NOT USE_VCPKG_LIBUV)
         endif()
         target_compile_definitions(wpiutil PRIVATE -D_GNU_SOURCE)
     else()
-        target_sources(wpiutil PRIVATE ${uv_windows_src})
+        target_sources(wpiutil PRIVATE ${wpiutil_windows_src} ${uv_windows_src})
         if(BUILD_SHARED_LIBS)
             target_compile_definitions(wpiutil PRIVATE -DBUILDING_UV_SHARED)
         endif()
diff --git a/wpiutil/build.gradle b/wpiutil/build.gradle
index 5d013d7bd1..6e1b35e08c 100644
--- a/wpiutil/build.gradle
+++ b/wpiutil/build.gradle
@@ -63,6 +63,16 @@ ext {
                         srcDirs 'src/main/native/include', 'src/main/native/libuv/include', 'src/main/native/libuv/src'
                     }
                 }
+                wpiutilUnixCpp(CppSourceSet) {
+                    source {
+                        srcDirs 'src/main/native/unix'
+                        include '**/*.cpp'
+                    }
+                    exportedHeaders {
+                        srcDirs 'src/main/native/include', 'src/main/native/cpp'
+                        include '**/*.h'
+                    }
+                }
             }
         }
         if (it.targetPlatform.operatingSystem.isWindows()) {
@@ -79,6 +89,16 @@ ext {
                         srcDirs 'src/main/native/include', 'src/main/native/libuv/include', 'src/main/native/libuv/src'
                     }
                 }
+                wpiutilWindowsCpp(CppSourceSet) {
+                    source {
+                        srcDirs 'src/main/native/windows'
+                        include '**/*.cpp'
+                    }
+                    exportedHeaders {
+                        srcDirs 'src/main/native/include', 'src/main/native/cpp'
+                        include '**/*.h'
+                    }
+                }
             }
         } else if (it.targetPlatform.operatingSystem.isMacOsX()) {
             it.sources {
diff --git a/wpiutil/src/main/native/include/wpi/Demangle.h b/wpiutil/src/main/native/include/wpi/Demangle.h
new file mode 100644
index 0000000000..b0e1134ec4
--- /dev/null
+++ b/wpiutil/src/main/native/include/wpi/Demangle.h
@@ -0,0 +1,25 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2008-2019 FIRST. All Rights Reserved.                        */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#ifndef WPIUTIL_WPI_DEMANGLE_H_
+#define WPIUTIL_WPI_DEMANGLE_H_
+
+#include <string>
+
+namespace wpi {
+
+/**
+ * Demangle a C++ symbol.
+ *
+ * @param mangledSymbol the mangled symbol.
+ * @return The demangled symbol, or mangledSymbol if demangling fails.
+ */
+std::string Demangle(char const* mangledSymbol);
+
+}  // namespace wpi
+
+#endif  // WPIUTIL_WPI_DEMANGLE_H_
diff --git a/wpiutil/src/main/native/include/wpi/StackTrace.h b/wpiutil/src/main/native/include/wpi/StackTrace.h
new file mode 100644
index 0000000000..56a377013b
--- /dev/null
+++ b/wpiutil/src/main/native/include/wpi/StackTrace.h
@@ -0,0 +1,24 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2008-2019 FIRST. All Rights Reserved.                        */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#ifndef WPIUTIL_WPI_STACKTRACE_H_
+#define WPIUTIL_WPI_STACKTRACE_H_
+
+#include <string>
+
+namespace wpi {
+
+/**
+ * Get a stack trace, ignoring the first "offset" symbols.
+ *
+ * @param offset The number of symbols at the top of the stack to ignore
+ */
+std::string GetStackTrace(int offset);
+
+}  // namespace wpi
+
+#endif  // WPIUTIL_WPI_STACKTRACE_H_
diff --git a/wpiutil/src/main/native/unix/Demangle.cpp b/wpiutil/src/main/native/unix/Demangle.cpp
new file mode 100644
index 0000000000..1ce4f31583
--- /dev/null
+++ b/wpiutil/src/main/native/unix/Demangle.cpp
@@ -0,0 +1,36 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2008-2019 FIRST. All Rights Reserved.                        */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#include "wpi/Demangle.h"
+
+#include <cxxabi.h>
+
+#include <cstdio>
+
+namespace wpi {
+
+std::string Demangle(char const* mangledSymbol) {
+  char buffer[256];
+  size_t length;
+  int32_t status;
+
+  if (std::sscanf(mangledSymbol, "%*[^(]%*[(]%255[^)+]", buffer)) {
+    char* symbol = abi::__cxa_demangle(buffer, nullptr, &length, &status);
+    if (status == 0) {
+      return symbol;
+    } else {
+      // If the symbol couldn't be demangled, it's probably a C function,
+      // so just return it as-is.
+      return buffer;
+    }
+  }
+
+  // If everything else failed, just return the mangled symbol
+  return mangledSymbol;
+}
+
+}  // namespace wpi
diff --git a/wpiutil/src/main/native/unix/StackTrace.cpp b/wpiutil/src/main/native/unix/StackTrace.cpp
new file mode 100644
index 0000000000..be280800c1
--- /dev/null
+++ b/wpiutil/src/main/native/unix/StackTrace.cpp
@@ -0,0 +1,37 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2008-2019 FIRST. All Rights Reserved.                        */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#include "wpi/StackTrace.h"
+
+#include <execinfo.h>
+
+#include "wpi/Demangle.h"
+#include "wpi/SmallString.h"
+#include "wpi/raw_ostream.h"
+
+namespace wpi {
+
+std::string GetStackTrace(int offset) {
+  void* stackTrace[128];
+  int stackSize = backtrace(stackTrace, 128);
+  char** mangledSymbols = backtrace_symbols(stackTrace, stackSize);
+  wpi::SmallString<1024> buf;
+  wpi::raw_svector_ostream trace(buf);
+
+  for (int i = offset; i < stackSize; i++) {
+    // Only print recursive functions once in a row.
+    if (i == 0 || stackTrace[i] != stackTrace[i - 1]) {
+      trace << "\tat " << Demangle(mangledSymbols[i]) << "\n";
+    }
+  }
+
+  std::free(mangledSymbols);
+
+  return trace.str();
+}
+
+}  // namespace wpi
diff --git a/wpiutil/src/main/native/windows/Demangle.cpp b/wpiutil/src/main/native/windows/Demangle.cpp
new file mode 100644
index 0000000000..34d1cabc61
--- /dev/null
+++ b/wpiutil/src/main/native/windows/Demangle.cpp
@@ -0,0 +1,30 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2008-2019 FIRST. All Rights Reserved.                        */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#include "wpi/Demangle.h"
+
+#include <windows.h>  // NOLINT(build/include_order)
+
+#include <dbghelp.h>
+
+#include "wpi/mutex.h"
+
+#pragma comment(lib, "Dbghelp.lib")
+
+namespace wpi {
+
+std::string Demangle(char const* mangledSymbol) {
+  static wpi::mutex m;
+  std::scoped_lock lock(m);
+  char buffer[256];
+  DWORD sz = UnDecorateSymbolName(mangledSymbol, buffer, sizeof(buffer),
+                                  UNDNAME_COMPLETE);
+  if (sz == 0) return mangledSymbol;
+  return std::string(buffer, sz);
+}
+
+}  // namespace wpi
diff --git a/wpiutil/src/main/native/windows/StackTrace.cpp b/wpiutil/src/main/native/windows/StackTrace.cpp
new file mode 100644
index 0000000000..86bbdffca2
--- /dev/null
+++ b/wpiutil/src/main/native/windows/StackTrace.cpp
@@ -0,0 +1,45 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2008-2019 FIRST. All Rights Reserved.                        */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#include "wpi/StackTrace.h"
+
+#include "StackWalker.h"
+#include "wpi/ConvertUTF.h"
+#include "wpi/SmallString.h"
+
+namespace {
+class StackTraceWalker : public StackWalker {
+ public:
+  explicit StackTraceWalker(std::string& output) : m_output(output) {}
+
+  void OnOutput(LPCTSTR szText) override;
+
+ private:
+  std::string& m_output;
+};
+}  // namespace
+
+void StackTraceWalker::OnOutput(LPCTSTR szText) {
+#ifdef _UNICODE
+  wpi::SmallString<128> utf8;
+  wpi::sys::windows::UTF16ToUTF8(szText, wcslen(szText), utf8);
+  m_output.append(utf8.data(), utf8.size());
+#else
+  m_output.append(szText);
+#endif
+}
+
+namespace wpi {
+
+std::string GetStackTrace(int offset) {
+  // TODO: implement offset
+  std::string output;
+  StackTraceWalker walker(output);
+  return output;
+}
+
+}  // namespace wpi
diff --git a/wpiutil/src/main/native/windows/StackWalker.cpp b/wpiutil/src/main/native/windows/StackWalker.cpp
new file mode 100644
index 0000000000..d4243d298a
--- /dev/null
+++ b/wpiutil/src/main/native/windows/StackWalker.cpp
@@ -0,0 +1,1373 @@
+/**********************************************************************
+ *
+ * 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>
+#pragma comment(lib, "version.lib") // for "VerQueryValue"
+#pragma warning(disable : 4826)
+
+#ifdef UNICODE
+  #define DBGHELP_TRANSLATE_TCHAR
+
+#endif
+#pragma pack(push, 8)
+#include <dbghelp.h>
+#pragma pack(pop)
+
+
+static void MyStrCpy(TCHAR* szDest, size_t nMaxDestSize, const TCHAR* szSrc)
+{
+  if (nMaxDestSize <= 0)
+    return;
+  _tcsncpy_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
+
+#ifdef _UNICODE
+  typedef SYMBOL_INFOW   tSymbolInfo;
+  typedef IMAGEHLP_LINEW64  tImageHelperLine;
+#else
+  typedef SYMBOL_INFO   tSymbolInfo;
+  typedef IMAGEHLP_LINE64  tImageHelperLine;
+#endif
+
+// 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;
+    symCleanup = NULL;
+    m_hProcess = hProcess;
+    m_szSymPath = NULL;
+    symFunctionTableAccess64 = NULL;
+    symGetLineFromAddr64 = NULL;
+    symGetModuleBase64 = NULL;
+    symGetModuleInfo64 = NULL;
+    symGetOptions = NULL;
+    symFromAddr = NULL;
+    symInitialize = NULL;
+    symLoadModuleEx = NULL;
+    symSetOptions = NULL;
+    stackWalk64 = NULL;
+    unDecorateSymbolName = NULL;
+    symGetSearchPath = NULL;
+  }
+  ~StackWalkerInternal()
+  {
+    if (symCleanup != NULL)
+      symCleanup(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(LPCTSTR 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;
+
+#ifdef _UNICODE
+    static const char strSymInitialize[] = "SymInitializeW";
+    static const char strUnDecorateSymbolName[] = "UnDecorateSymbolNameW";
+    static const char strSymGetSearchPath[] = "SymGetSearchPathW";
+    static const char strSymLoadModuleEx[] = "SymLoadModuleExW";
+    static const char strSymGetLineFromAddr64[] = "SymGetLineFromAddrW64";
+    static const char strSymGetModuleInfo64[] = "SymGetModuleInfoW64";
+    static const char strSymFromAddr[] = "SymFromAddrW";
+#else
+    static const char strSymInitialize[] = "SymInitialize";
+    static const char strUnDecorateSymbolName[] = "UnDecorateSymbolName";
+    static const char strSymGetSearchPath[] = "SymGetSearchPath";
+    static const char strSymLoadModuleEx[] = "SymLoadModuleEx";
+    static const char strSymGetLineFromAddr64[] = "SymGetLineFromAddr64";
+    static const char strSymGetModuleInfo64[] = "SymGetModuleInfo64";
+    static const char strSymFromAddr[] = "SymFromAddr";
+#endif
+    symInitialize = (tSI)GetProcAddress(m_hDbhHelp, strSymInitialize);
+    symCleanup = (tSC)GetProcAddress(m_hDbhHelp, "SymCleanup");
+
+    stackWalk64 = (tSW)GetProcAddress(m_hDbhHelp, "StackWalk64");
+    symGetOptions = (tSGO)GetProcAddress(m_hDbhHelp, "SymGetOptions");
+    symSetOptions = (tSSO)GetProcAddress(m_hDbhHelp, "SymSetOptions");
+
+    symFunctionTableAccess64 = (tSFTA)GetProcAddress(m_hDbhHelp, "SymFunctionTableAccess64");
+    symGetLineFromAddr64 = (tSGLFA)GetProcAddress(m_hDbhHelp, strSymGetLineFromAddr64);
+    symGetModuleBase64 = (tSGMB)GetProcAddress(m_hDbhHelp, "SymGetModuleBase64");
+    symGetModuleInfo64 = (tSGMI)GetProcAddress(m_hDbhHelp, strSymGetModuleInfo64);
+    symFromAddr = (tSFA)GetProcAddress(m_hDbhHelp, strSymFromAddr);
+    unDecorateSymbolName = (tUDSN)GetProcAddress(m_hDbhHelp, strUnDecorateSymbolName);
+    symLoadModuleEx = (tSLM)GetProcAddress(m_hDbhHelp, strSymLoadModuleEx);
+    symGetSearchPath = (tSGSP)GetProcAddress(m_hDbhHelp, strSymGetSearchPath);
+
+    if (symCleanup == NULL || symFunctionTableAccess64 == NULL || symGetModuleBase64 == NULL || symGetModuleInfo64 == NULL || symGetOptions == NULL ||
+        symFromAddr == NULL || symInitialize == NULL || symSetOptions == NULL || stackWalk64 == NULL || unDecorateSymbolName == NULL ||
+        symLoadModuleEx == NULL)
+    {
+      FreeLibrary(m_hDbhHelp);
+      m_hDbhHelp = NULL;
+      symCleanup = NULL;
+      return FALSE;
+    }
+
+    // SymInitialize
+    if (szSymPath != NULL)
+      m_szSymPath = _tcsdup(szSymPath);
+    if (this->symInitialize(m_hProcess, m_szSymPath, FALSE) == FALSE)
+      this->m_parent->OnDbgHelpErr(_T("SymInitialize"), GetLastError(), 0);
+
+    DWORD symOptions = this->symGetOptions(); // SymGetOptions
+    symOptions |= SYMOPT_LOAD_LINES;
+    symOptions |= SYMOPT_FAIL_CRITICAL_ERRORS;
+    //symOptions |= SYMOPT_NO_PROMPTS;
+    // SymSetOptions
+    symOptions = this->symSetOptions(symOptions);
+
+    TCHAR buf[StackWalker::STACKWALK_MAX_NAMELEN] = {0};
+    if (this->symGetSearchPath != NULL)
+    {
+      if (this->symGetSearchPath(m_hProcess, buf, StackWalker::STACKWALK_MAX_NAMELEN) == FALSE)
+        this->m_parent->OnDbgHelpErr(_T("SymGetSearchPath"), GetLastError(), 0);
+    }
+    TCHAR  szUserName[1024] = {0};
+    DWORD dwSize = 1024;
+    GetUserName(szUserName, &dwSize);
+    this->m_parent->OnSymInit(buf, symOptions, szUserName);
+
+    return TRUE;
+  }
+
+  StackWalker* m_parent;
+
+  HMODULE m_hDbhHelp;
+  HANDLE  m_hProcess;
+  LPTSTR   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
+    TCHAR     ModuleName[32];       // module name
+    TCHAR     ImageName[256];       // image name
+    TCHAR     LoadedImageName[256]; // symbol file name
+    // new elements: 07-Jun-2002
+    TCHAR  LoadedPdbName[256];   // pdb file name
+    DWORD CVSig;                // Signature of the CV record in the debug directories
+    TCHAR  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 symCleanup;
+
+  // SymFunctionTableAccess64()
+  typedef PVOID(__stdcall* tSFTA)(HANDLE hProcess, DWORD64 AddrBase);
+  tSFTA symFunctionTableAccess64;
+
+  // SymGetLineFromAddr64()
+  typedef BOOL(__stdcall* tSGLFA)(IN HANDLE hProcess,
+                                  IN DWORD64 dwAddr,
+                                  OUT PDWORD pdwDisplacement,
+                                  OUT tImageHelperLine* Line);
+  tSGLFA symGetLineFromAddr64;
+
+  // SymGetModuleBase64()
+  typedef DWORD64(__stdcall* tSGMB)(IN HANDLE hProcess, IN DWORD64 dwAddr);
+  tSGMB symGetModuleBase64;
+
+  // SymGetModuleInfo64()
+  typedef BOOL(__stdcall* tSGMI)(IN HANDLE hProcess,
+                                 IN DWORD64 dwAddr,
+                                 OUT IMAGEHLP_MODULE64_V3* ModuleInfo);
+  tSGMI symGetModuleInfo64;
+
+  // SymGetOptions()
+  typedef DWORD(__stdcall* tSGO)(VOID);
+  tSGO symGetOptions;
+
+
+  // SymGetSymFromAddr64()
+  typedef BOOL(__stdcall* tSFA)(IN HANDLE hProcess,
+                                  IN DWORD64 Address,
+                                  OUT PDWORD64 pdwDisplacement,
+                                  OUT tSymbolInfo* Symbol);
+  tSFA symFromAddr;
+
+  // SymInitialize()
+  typedef BOOL(__stdcall* tSI)(IN HANDLE hProcess, IN PTSTR UserSearchPath, IN BOOL fInvadeProcess);
+  tSI symInitialize;
+
+  // SymLoadModule64()
+  typedef DWORD64(__stdcall* tSLM)(IN HANDLE hProcess,
+                                   IN HANDLE hFile,
+                                   IN PTSTR ImageName,
+                                   IN PTSTR ModuleName,
+                                   IN DWORD64 BaseOfDll,
+                                   IN DWORD SizeOfDll,
+                                   IN PMODLOAD_DATA Data,
+                                   IN DWORD         Flags);
+  tSLM symLoadModuleEx;
+
+  // SymSetOptions()
+  typedef DWORD(__stdcall* tSSO)(IN DWORD SymOptions);
+  tSSO symSetOptions;
+
+  // 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 stackWalk64;
+
+  // UnDecorateSymbolName()
+  typedef DWORD(__stdcall WINAPI* tUDSN)(PCTSTR DecoratedName,
+                                         PTSTR  UnDecoratedName,
+                                         DWORD UndecoratedLength,
+                                         DWORD Flags);
+  tUDSN unDecorateSymbolName;
+
+  typedef BOOL(__stdcall WINAPI* tSGSP)(HANDLE hProcess, PTSTR SearchPath, DWORD SearchPathLength);
+  tSGSP symGetSearchPath;
+
+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
+    TCHAR   szModule[MAX_MODULE_NAME32 + 1];
+    TCHAR   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       createToolhelp32Snapshot = NULL;
+    tM32F        module32First = NULL;
+    tM32N        module32Next = NULL;
+
+    HANDLE        hSnap;
+    MODULEENTRY32 moduleEntry32;
+    moduleEntry32.dwSize = sizeof(moduleEntry32);
+    BOOL   keepGoing;
+
+#ifdef _UNICODE
+    static const char strModule32First[] = "Module32FirstW";
+    static const char strModule32Next[] = "Module32NextW";
+ #else
+    static const char strModule32First[] = "Module32First";
+    static const char strModule32Next[] = "Module32Next";
+#endif
+    for (size_t i = 0; i < (sizeof(dllname) / sizeof(dllname[0])); i++)
+    {
+      hToolhelp = LoadLibrary(dllname[i]);
+      if (hToolhelp == NULL)
+        continue;
+      createToolhelp32Snapshot = (tCT32S)GetProcAddress(hToolhelp, "CreateToolhelp32Snapshot");
+      module32First = (tM32F)GetProcAddress(hToolhelp, strModule32First);  
+      module32Next = (tM32N)GetProcAddress(hToolhelp, strModule32Next); 
+      if ((createToolhelp32Snapshot != NULL) && (module32First != NULL) && (module32Next != NULL))
+        break; // found the functions!
+      FreeLibrary(hToolhelp);
+      hToolhelp = NULL;
+    }
+
+    if (hToolhelp == NULL)
+      return FALSE;
+
+    hSnap = createToolhelp32Snapshot(TH32CS_SNAPMODULE, pid);
+    if (hSnap == (HANDLE)-1)
+    {
+      FreeLibrary(hToolhelp);
+      return FALSE;
+    }
+
+    keepGoing = !!module32First(hSnap, &moduleEntry32);
+    int cnt = 0;
+    while (keepGoing)
+    {
+      this->LoadModule(hProcess, moduleEntry32.szExePath, moduleEntry32.szModule, (DWORD64)moduleEntry32.modBaseAddr,
+                       moduleEntry32.modBaseSize);
+      cnt++;
+      keepGoing = !!module32Next(hSnap, &moduleEntry32);
+    }
+    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, LPTSTR lpFilename,
+                                      DWORD nSize);
+    // GetModuleBaseName()
+    typedef DWORD(__stdcall * tGMBN)(HANDLE hProcess, HMODULE hModule, LPTSTR lpFilename,
+                                     DWORD nSize);
+    // GetModuleInformation()
+    typedef BOOL(__stdcall * tGMI)(HANDLE hProcess, HMODULE hModule, LPMODULEINFO pmi, DWORD nSize);
+
+      //ModuleEntry e;
+    DWORD        cbNeeded;
+    MODULEINFO   mi;
+    HMODULE*     hMods = 0;
+    TCHAR*        tt = NULL;
+    TCHAR*        tt2 = NULL;
+    const SIZE_T TTBUFLEN = 8096;
+    int          cnt = 0;
+
+    HINSTANCE hPsapi = LoadLibrary(_T("psapi.dll"));
+    if (hPsapi == NULL)
+      return FALSE;
+
+#ifdef _UNICODE
+    static const char strGetModuleFileName[] = "GetModuleFileNameExW";
+    static const char strGetModuleBaseName[] = "GetModuleBaseNameW";
+#else
+    static const char strGetModuleFileName[] = "GetModulefileNameExA";
+    static const char strGetModuleBaseName[] = "GetModuleBaseNameA";
+#endif
+
+    tEPM   enumProcessModules = (tEPM)GetProcAddress(hPsapi, "EnumProcessModules");
+    tGMFNE getModuleFileNameEx = (tGMFNE)GetProcAddress(hPsapi, strGetModuleFileName);
+    tGMBN  getModuleBaseName = (tGMFNE)GetProcAddress(hPsapi, strGetModuleBaseName);
+    tGMI   getModuleInformation = (tGMI)GetProcAddress(hPsapi, "GetModuleInformation");
+    if ((enumProcessModules == NULL) || (getModuleFileNameEx == NULL) ||
+        (getModuleBaseName == NULL) || (getModuleInformation == NULL))
+    {
+      // we couldn't find all functions
+      FreeLibrary(hPsapi);
+      return FALSE;
+    }
+
+    hMods = (HMODULE*)malloc(sizeof(HMODULE) * (TTBUFLEN / sizeof(HMODULE)));
+    tt = (TCHAR*)malloc(sizeof(TCHAR) * TTBUFLEN);
+    tt2 = (TCHAR*)malloc(sizeof(TCHAR) * TTBUFLEN);
+    if ((hMods == NULL) || (tt == NULL) || (tt2 == NULL))
+      goto cleanup;
+
+    if (!enumProcessModules(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 (DWORD i = 0; i < cbNeeded / sizeof(hMods[0]); i++)
+    {
+      // base address, size
+      getModuleInformation(hProcess, hMods[i], &mi, sizeof(mi));
+      // image file name
+      tt[0] = 0;
+      getModuleFileNameEx(hProcess, hMods[i], tt, TTBUFLEN);
+      // module name
+      tt2[0] = 0;
+      getModuleBaseName(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(_T("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, LPCTSTR img, LPCTSTR mod, DWORD64 baseAddr, DWORD size)
+  {
+    TCHAR* szImg = _tcsdup(img);
+    TCHAR* szMod = _tcsdup(mod);
+    DWORD result = ERROR_SUCCESS;
+    if ((szImg == NULL) || (szMod == NULL))
+      result = ERROR_NOT_ENOUGH_MEMORY;
+    else
+    {
+      if (symLoadModuleEx(hProcess, 0, szImg, szMod, baseAddr, size, 0, 0) == 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 = GetFileVersionInfoSize(szImg, &dwHandle);
+        if (dwSize > 0)
+        {
+          LPVOID vData = malloc(dwSize);
+          if (vData != NULL)
+          {
+            if (GetFileVersionInfo(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 TCHAR*          szSymType = _T("-unknown-");
+      if (this->GetModuleInfo(hProcess, baseAddr, &Module) != FALSE)
+      {
+        switch (Module.SymType)
+        {
+          case SymNone:
+            szSymType = _T("-nosymbols-");
+            break;
+          case SymCoff: // 1
+            szSymType = _T("COFF");
+            break;
+          case SymCv: // 2
+            szSymType = _T("CV");
+            break;
+          case SymPdb: // 3
+            szSymType = _T("PDB");
+            break;
+          case SymExport: // 4
+            szSymType = _T("-exported-");
+            break;
+          case SymDeferred: // 5
+            szSymType = _T("-deferred-");
+            break;
+          case SymSym: // 6
+            szSymType = _T("SYM");
+            break;
+          case 7: // SymDia:
+            szSymType = _T("DIA");
+            break;
+          case 8: //SymVirtual:
+            szSymType = _T("Virtual");
+            break;
+        }
+      }
+      LPCTSTR 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->symGetModuleInfo64 == 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->symGetModuleInfo64(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->symGetModuleInfo64(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, LPCTSTR 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 = _tcsdup(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:
+  TCHAR* szSymPath = NULL;
+  if ((this->m_options & SymBuildPath) != 0)
+  {
+    const size_t nSymPathLen = 4096;
+    szSymPath = (TCHAR*)malloc(nSymPathLen * sizeof(TCHAR));
+    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)
+    {
+      _tcscat_s(szSymPath, nSymPathLen, this->m_szSymPath);
+      _tcscat_s(szSymPath, nSymPathLen, _T(";"));
+    }
+
+    _tcscat_s(szSymPath, nSymPathLen, _T(".;"));
+
+    const size_t nTempLen = 1024;
+    TCHAR         szTemp[nTempLen];
+    // Now add the current directory:
+    if (GetCurrentDirectory(nTempLen, szTemp) > 0)
+    {
+      szTemp[nTempLen - 1] = 0;
+      _tcscat_s(szSymPath, nSymPathLen, szTemp);
+      _tcscat_s(szSymPath, nSymPathLen, _T(";"));
+    }
+
+    // Now add the path for the main-module:
+    if (GetModuleFileName(NULL, szTemp, nTempLen) > 0)
+    {
+      szTemp[nTempLen - 1] = 0;
+      for (TCHAR* p = (szTemp + _tcslen(szTemp) - 1); p >= szTemp; --p)
+      {
+        // locate the rightmost path separator
+        if ((*p == '\\') || (*p == '/') || (*p == ':'))
+        {
+          *p = 0;
+          break;
+        }
+      } // for (search for path separator...)
+      if (_tcslen(szTemp) > 0)
+      {
+        _tcscat_s(szSymPath, nSymPathLen, szTemp);
+        _tcscat_s(szSymPath, nSymPathLen, _T(";"));
+      }
+    }
+    if (GetEnvironmentVariable(_T("_NT_SYMBOL_PATH"), szTemp, nTempLen) > 0)
+    {
+      szTemp[nTempLen - 1] = 0;
+      _tcscat_s(szSymPath, nSymPathLen, szTemp);
+      _tcscat_s(szSymPath, nSymPathLen, _T(";"));
+    }
+    if (GetEnvironmentVariable(_T("_NT_ALTERNATE_SYMBOL_PATH"), szTemp, nTempLen) > 0)
+    {
+      szTemp[nTempLen - 1] = 0;
+      _tcscat_s(szSymPath, nSymPathLen, szTemp);
+      _tcscat_s(szSymPath, nSymPathLen, _T(";"));
+    }
+    if (GetEnvironmentVariable(_T("SYSTEMROOT"), szTemp, nTempLen) > 0)
+    {
+      szTemp[nTempLen - 1] = 0;
+      _tcscat_s(szSymPath, nSymPathLen, szTemp);
+      _tcscat_s(szSymPath, nSymPathLen, _T(";"));
+      // also add the "system32"-directory:
+      _tcscat_s(szTemp, nTempLen, _T("\\system32"));
+      _tcscat_s(szSymPath, nSymPathLen, szTemp);
+      _tcscat_s(szSymPath, nSymPathLen, _T(";"));
+    }
+
+    if ((this->m_options & SymUseSymSrv) != 0)
+    {
+      if (GetEnvironmentVariable(_T("SYSTEMDRIVE"), szTemp, nTempLen) > 0)
+      {
+        szTemp[nTempLen - 1] = 0;
+        _tcscat_s(szSymPath, nSymPathLen, _T("SRV*"));
+        _tcscat_s(szSymPath, nSymPathLen, szTemp);
+        _tcscat_s(szSymPath, nSymPathLen, _T("\\websymbols"));
+        _tcscat_s(szSymPath, nSymPathLen, _T("*http://msdl.microsoft.com/download/symbols;"));
+      }
+      else
+        _tcscat_s(szSymPath, nSymPathLen,
+                 _T("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(_T("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;
+
+  tSymbolInfo* pSym = NULL;
+  StackWalkerInternal::IMAGEHLP_MODULE64_V3 Module;
+  tImageHelperLine                           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 = (tSymbolInfo*)malloc(sizeof(tSymbolInfo) + STACKWALK_MAX_NAMELEN*sizeof(TCHAR));
+  if (!pSym)
+    goto cleanup; // not enough memory...
+  memset(pSym, 0, sizeof(tSymbolInfo) + STACKWALK_MAX_NAMELEN*sizeof(TCHAR));
+  pSym->SizeOfStruct = sizeof(tSymbolInfo);
+  pSym->MaxNameLen = 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->stackWalk64(imageType, this->m_hProcess, hThread, &s, &c, myReadProcMem,
+                         this->m_sw->symFunctionTableAccess64, this->m_sw->symGetModuleBase64, NULL))
+    {
+      // INFO: "StackWalk64" does not set "GetLastError"...
+      this->OnDbgHelpErr(_T("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(_T("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->symFromAddr(this->m_hProcess, s.AddrPC.Offset, &(csEntry.offsetFromSmybol),
+                             pSym) != FALSE)
+      {
+        MyStrCpy(csEntry.name, STACKWALK_MAX_NAMELEN, pSym->Name);
+        // UnDecorateSymbolName()
+        DWORD res = this->m_sw->unDecorateSymbolName(pSym->Name, csEntry.undName, STACKWALK_MAX_NAMELEN, UNDNAME_NAME_ONLY);
+        res = this->m_sw->unDecorateSymbolName(pSym->Name, csEntry.undFullName, STACKWALK_MAX_NAMELEN, UNDNAME_COMPLETE);
+      }
+      else
+      {
+        this->OnDbgHelpErr(_T("SymGetSymFromAddr64"), GetLastError(), s.AddrPC.Offset);
+      }
+
+      // show line number info, NT5.0-method (SymGetLineFromAddr64())
+      if (this->m_sw->symGetLineFromAddr64 != NULL)
+      { // yes, we have SymGetLineFromAddr64()
+        if (this->m_sw->symGetLineFromAddr64(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(_T("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(_T("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->symFromAddr == NULL)
+    return FALSE;
+
+  // Show object info (SymGetSymFromAddr64())
+  DWORD64            dwAddress = DWORD64(pObject);
+  DWORD64            dwDisplacement = 0;
+  tSymbolInfo* pSym =
+      (tSymbolInfo*)malloc(sizeof(tSymbolInfo) + STACKWALK_MAX_NAMELEN*sizeof(TCHAR));
+  memset(pSym, 0, sizeof(tSymbolInfo) + STACKWALK_MAX_NAMELEN*sizeof(TCHAR));
+  pSym->SizeOfStruct = sizeof(tSymbolInfo);
+  pSym->MaxNameLen = STACKWALK_MAX_NAMELEN;
+  if (this->m_sw->symFromAddr(this->m_hProcess, dwAddress, &dwDisplacement, pSym) == FALSE)
+  {
+    this->OnDbgHelpErr(_T("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(LPCTSTR    img,
+                               LPCTSTR    mod,
+                               DWORD64   baseAddr,
+                               DWORD     size,
+                               DWORD     result,
+                               LPCTSTR    symType,
+                               LPCTSTR    pdbName,
+                               ULONGLONG fileVersion)
+{
+  TCHAR   buffer[STACKWALK_MAX_NAMELEN];
+  size_t maxLen = STACKWALK_MAX_NAMELEN;
+#if _MSC_VER >= 1400
+  maxLen = _TRUNCATE;
+#endif
+  if (fileVersion == 0)
+    _sntprintf_s(buffer, maxLen, _T("%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);
+    _sntprintf_s(
+        buffer, maxLen,
+        _T("%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)
+{
+  TCHAR   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, _T("(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, _T("(filename not available)"));
+      if (entry.moduleName[0] == 0)
+        MyStrCpy(entry.moduleName, STACKWALK_MAX_NAMELEN, _T("(module-name not available)"));
+      _sntprintf_s(buffer, maxLen, _T("%p (%s): %s: %s\n"), (LPVOID)entry.offset, entry.moduleName,
+                  entry.lineFileName, entry.name);
+    }
+    else
+      _sntprintf_s(buffer, maxLen, _T("%s (%d): %s\n"), entry.lineFileName, entry.lineNumber,
+                  entry.name);
+    buffer[STACKWALK_MAX_NAMELEN - 1] = 0;
+    OnOutput(buffer);
+  }
+}
+
+void StackWalker::OnDbgHelpErr(LPCTSTR szFuncName, DWORD gle, DWORD64 addr)
+{
+  TCHAR   buffer[STACKWALK_MAX_NAMELEN];
+  size_t maxLen = STACKWALK_MAX_NAMELEN;
+#if _MSC_VER >= 1400
+  maxLen = _TRUNCATE;
+#endif
+  _sntprintf_s(buffer, maxLen, _T("ERROR: %s, GetLastError: %d (Address: %p)\n"), szFuncName, gle,
+              (LPVOID)addr);
+  buffer[STACKWALK_MAX_NAMELEN - 1] = 0;
+  OnOutput(buffer);
+}
+
+void StackWalker::OnSymInit(LPCTSTR szSearchPath, DWORD symOptions, LPCTSTR szUserName)
+{
+  TCHAR   buffer[STACKWALK_MAX_NAMELEN];
+  size_t maxLen = STACKWALK_MAX_NAMELEN;
+#if _MSC_VER >= 1400
+  maxLen = _TRUNCATE;
+#endif
+  _sntprintf_s(buffer, maxLen, _T("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
+  OSVERSIONINFOEX ver;
+  ZeroMemory(&ver, sizeof(OSVERSIONINFOEX));
+  ver.dwOSVersionInfoSize = sizeof(ver);
+#if _MSC_VER >= 1900
+#pragma warning(push)
+#pragma warning(disable : 4996)
+#endif
+  if (GetVersionEx((OSVERSIONINFO*)&ver) != FALSE)
+  {
+    _sntprintf_s(buffer, maxLen, _T("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(LPCTSTR buffer)
+{
+  OutputDebugString(buffer);
+}
diff --git a/wpiutil/src/main/native/windows/StackWalker.h b/wpiutil/src/main/native/windows/StackWalker.h
new file mode 100644
index 0000000000..67bdf4d665
--- /dev/null
+++ b/wpiutil/src/main/native/windows/StackWalker.h
@@ -0,0 +1,178 @@
+/**********************************************************************
+ *
+ * StackWalker.h
+ *
+ *
+ *
+ * LICENSE (http://www.opensource.org/licenses/bsd-license.php)
+ *
+ *   Copyright (c) 2005-2009, 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.
+ *
+ * **********************************************************************/
+#pragma once
+
+#include <windows.h>
+
+#if _MSC_VER >= 1900
+#pragma warning(disable : 4091)
+#endif
+
+class StackWalkerInternal; // forward
+class StackWalker
+{
+public:
+  typedef enum StackWalkOptions
+  {
+    // No addition info will be retrieved
+    // (only the address is available)
+    RetrieveNone = 0,
+
+    // Try to get the symbol-name
+    RetrieveSymbol = 1,
+
+    // Try to get the line for this symbol
+    RetrieveLine = 2,
+
+    // Try to retrieve the module-infos
+    RetrieveModuleInfo = 4,
+
+    // Also retrieve the version for the DLL/EXE
+    RetrieveFileVersion = 8,
+
+    // Contains all the above
+    RetrieveVerbose = 0xF,
+
+    // Generate a "good" symbol-search-path
+    SymBuildPath = 0x10,
+
+    // Also use the public Microsoft-Symbol-Server
+    SymUseSymSrv = 0x20,
+
+    // Contains all the above "Sym"-options
+    SymAll = 0x30,
+
+    // Contains all options (default)
+    OptionsAll = 0x3F
+  } StackWalkOptions;
+
+  StackWalker(int    options = OptionsAll, // 'int' is by design, to combine the enum-flags
+              LPCTSTR szSymPath = NULL,
+              DWORD  dwProcessId = GetCurrentProcessId(),
+              HANDLE hProcess = GetCurrentProcess());
+  StackWalker(DWORD dwProcessId, HANDLE hProcess);
+  virtual ~StackWalker();
+
+  typedef BOOL(__stdcall* PReadProcessMemoryRoutine)(
+      HANDLE  hProcess,
+      DWORD64 qwBaseAddress,
+      PVOID   lpBuffer,
+      DWORD   nSize,
+      LPDWORD lpNumberOfBytesRead,
+      LPVOID  pUserData // optional data, which was passed in "ShowCallstack"
+  );
+
+  BOOL LoadModules();
+
+  BOOL ShowCallstack(
+      HANDLE                    hThread = GetCurrentThread(),
+      const CONTEXT*            context = NULL,
+      PReadProcessMemoryRoutine readMemoryFunction = NULL,
+      LPVOID pUserData = NULL // optional to identify some data in the 'readMemoryFunction'-callback
+  );
+
+  BOOL ShowObject(LPVOID pObject);
+
+protected:
+  enum
+  {
+    STACKWALK_MAX_NAMELEN = 1024
+  }; // max name length for found symbols
+
+protected:
+  // Entry for each Callstack-Entry
+  typedef struct CallstackEntry
+  {
+    DWORD64 offset; // if 0, we have no valid entry
+    TCHAR    name[STACKWALK_MAX_NAMELEN];
+    TCHAR    undName[STACKWALK_MAX_NAMELEN];
+    TCHAR    undFullName[STACKWALK_MAX_NAMELEN];
+    DWORD64 offsetFromSmybol;
+    DWORD   offsetFromLine;
+    DWORD   lineNumber;
+    TCHAR    lineFileName[STACKWALK_MAX_NAMELEN];
+    DWORD   symType;
+    LPCSTR  symTypeString;
+    TCHAR    moduleName[STACKWALK_MAX_NAMELEN];
+    DWORD64 baseOfImage;
+    TCHAR    loadedImageName[STACKWALK_MAX_NAMELEN];
+  } CallstackEntry;
+
+  typedef enum CallstackEntryType
+  {
+    firstEntry,
+    nextEntry,
+    lastEntry
+  } CallstackEntryType;
+
+  virtual void OnSymInit(LPCTSTR szSearchPath, DWORD symOptions, LPCTSTR szUserName);
+  virtual void OnLoadModule(LPCTSTR    img,
+                            LPCTSTR    mod,
+                            DWORD64   baseAddr,
+                            DWORD     size,
+                            DWORD     result,
+                            LPCTSTR    symType,
+                            LPCTSTR    pdbName,
+                            ULONGLONG fileVersion);
+  virtual void OnCallstackEntry(CallstackEntryType eType, CallstackEntry& entry);
+  virtual void OnDbgHelpErr(LPCTSTR szFuncName, DWORD gle, DWORD64 addr);
+  virtual void OnOutput(LPCTSTR szText);
+
+  StackWalkerInternal* m_sw;
+  HANDLE               m_hProcess;
+  DWORD                m_dwProcessId;
+  BOOL                 m_modulesLoaded;
+  LPTSTR               m_szSymPath;
+
+  int m_options;
+  int m_MaxRecursionCount;
+
+  static BOOL __stdcall myReadProcMem(HANDLE  hProcess,
+                                      DWORD64 qwBaseAddress,
+                                      PVOID   lpBuffer,
+                                      DWORD   nSize,
+                                      LPDWORD lpNumberOfBytesRead);
+
+  friend StackWalkerInternal;
+}; // class StackWalker
+
+// The following is defined for x86 (XP and higher), x64 and IA64:
+#define GET_CURRENT_CONTEXT_STACKWALKER_CODEPLEX(c, contextFlags) \
+  do                                                              \
+  {                                                               \
+    memset(&c, 0, sizeof(CONTEXT));                               \
+    c.ContextFlags = contextFlags;                                \
+    RtlCaptureContext(&c);                                        \
+  } while (0);