A Mixed-Mode Stackwalk with the IDebugClient Interface

Mattias Högström

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22 Apr 2012Ms-PL12 min read

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A native stackwalk funtion like Stackwalk64 cannot handle mixed-mode stacks, since managed code does not use the stack in the same way as native code does. There is an API called IDebugClient, that does walk a mixed-mode stack correctly, which we will explore.

MixedModeStack_src.zip
- MixedModeStack_src
  - License.html
  - SampleApps
    - CppCliApp
      - app.ico
      - app.rc
      - AssemblyInfo.cpp
      - CppCliApp.cpp
      - CppCliApp.vcxproj
      - CppCliApp.vcxproj.filters
      - CppCliApp.vcxproj.user
      - Debug
        
        CppCliApp.Build.CppClean.log
        
        CppCliApp.log
      - ReadMe.txt
      - resource.h
      - stdafx.cpp
      - stdafx.h
    - Debug
    - ManagedLib0
      - A.cs
      - AB.cs
      - bin
        
        Debug
        
        Release
      - ManagedLib0.csproj
      - obj
        
        Debug
        
        TempPE
      - Properties
        
        AssemblyInfo.cs
      - Win32Imports.cs
    - MixedLib1
      - ABC.h
      - app.ico
      - app.rc
      - AssemblyInfo.cpp
      - Debug
        
        MixedLib1.Build.CppClean.log
        
        MixedLib1.log
      - MixedLib1.cpp
      - MixedLib1.h
      - MixedLib1.vcxproj
      - MixedLib1.vcxproj.filters
      - MixedLib1.vcxproj.user
      - ReadMe.txt
      - resource.h
      - Stdafx.cpp
      - Stdafx.h
    - MixedStackTraceLibrary
      - app.ico
      - app.rc
      - AssemblyInfo.cpp
      - Debug
        
        MixedStackTraceLibrary.Build.CppClean.log
        
        MixedStackTraceLibrary.log
      - MixedStackTraceLibrary.cpp
      - MixedStackTraceLibrary.h
      - MixedStackTraceLibrary.vcxproj
      - MixedStackTraceLibrary.vcxproj.filters
      - MixedStackTraceLibrary.vcxproj.user
      - ReadMe.txt
      - resource.h
      - sdk
        
        inc
        
        dbgeng.h
        
        dbghelp.h
        
        engextcpp.cpp
        
        engextcpp.hpp
        
        extsfns.h
        
        wdbgexts.h
        
        lib
        
        dbgeng.lib
        
        dbghelp.lib
        
        engextcpp.lib
      - StackWalk64Trace.cpp
      - StackWalk64Trace.h
      - Stdafx.cpp
      - Stdafx.h
    - SampleApps.sln
    - StackTraceLibrary
      - bin
        
        Debug
        
        Release
      - obj
        
        Debug
        
        TempPE
      - Properties
        
        AssemblyInfo.cs
      - StackTraceHelper.cs
      - StackTraceLibrary.csproj
  - StackwalkApps
    - Debug
    - DiagApp
      - app.ico
      - app.rc
      - AssemblyInfo.cpp
      - Debug
        
        DiagApp.log
      - DiagApp.cpp
      - DiagApp.vcxproj
      - DiagApp.vcxproj.filters
      - DiagApp.vcxproj.user
      - DiagCLib.cpp
      - DiagCLRDataTarget.h
      - DotNetHelper.cpp
      - DotNetHelper.h
      - NativeDebugging.cpp
      - NativeDebugging.h
      - ReadMe.txt
      - resource.h
      - sdk
        
        inc
        
        dbgeng.h
        
        dbghelp.h
        
        engextcpp.cpp
        
        engextcpp.hpp
        
        extsfns.h
        
        wdbgexts.h
        
        lib
        
        dbgeng.lib
        
        dbghelp.lib
        
        engextcpp.lib
      - Stackwalker.cpp
      - Stackwalker.h
      - stdafx.cpp
      - stdafx.h
      - xclrdata
        
        dlldata.c
        
        license.txt
        
        xclrdata.h
        
        xclrdata.idl
        
        xclrdata_i.c
        
        xclrdata_p.c
    - StackWalk64App
      - Debug
        
        StackWalk64App.log
      - ReadMe.txt
      - sdk
        
        inc
        
        dbgeng.h
        
        dbghelp.h
        
        engextcpp.cpp
        
        engextcpp.hpp
        
        extsfns.h
        
        wdbgexts.h
        
        lib
        
        dbgeng.lib
        
        dbghelp.lib
        
        engextcpp.lib
      - StackWalk64App.cpp
      - StackWalk64App.vcxproj
      - StackWalk64App.vcxproj.filters
      - StackWalk64App.vcxproj.user
      - stdafx.cpp
      - stdafx.h
      - targetver.h
    - StackwalkApps.sln
MixedModeStack_demo.zip
- MixedModeStack_demo
  - CppCliApp.exe
  - CppCliApp.ilk
  - CppCliApp.pdb
  - DiagApp.exe
  - DiagApp.ilk
  - DiagApp.pdb
  - ManagedLib0.dll
  - ManagedLib0.pdb
  - MixedLib1.dll
  - MixedLib1.ilk
  - MixedLib1.pdb
  - MixedStackTraceLibrary.dll
  - MixedStackTraceLibrary.ilk
  - MixedStackTraceLibrary.pdb
  - ReadMe.txt
  - StackTraceLibrary.dll
  - StackTraceLibrary.pdb
  - StackWalk64App.exe
  - StackWalk64App.ilk
  - StackWalk64App.pdb

// stdafx.cpp : source file that includes just the standard includes
// StackWalk64App.pch will be the pre-compiled header
// stdafx.obj will contain the pre-compiled type information

#include "stdafx.h"

// TODO: reference any additional headers you need in STDAFX.H
// and not in this file

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License

This article, along with any associated source code and files, is licensed under The Microsoft Public License (Ms-PL)

Written By

Mattias Högström

Architect Visma Software AB

Sweden

Mattias works at Visma, a leading Nordic ERP solution provider. He has good knowledge in C++/.Net development, test tool development, and debugging. His great passion is memory dump analysis. He likes giving talks and courses.

A Mixed-Mode Stackwalk with the IDebugClient Interface

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