ILRewriting for beginners

Mattias Högström

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27 Sep 2012Ms-PL11 min read

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Runtime IL-Rewriting can be used to add behavior such as logging to applications, or redirect calls from one API to another. This article and accompanying source code explains how to substitute a method call at runtime.

ILRewriting_demo.zip
- ILRewriting_demo
  - ILRewriteProfiler.dll
  - InterceptApp.exe
  - InterceptLib.dll
  - License.html
  - README.txt
  - runit.bat
  - SampleApp1.exe
ILRewriting_src.zip
- ILRewriting_src
  - ILEmitTest
    - ILEmitTest.csproj
    - License.html
    - Program.cs
    - Properties
      - AssemblyInfo.cs
  - ILRewriteProfiler
  - ILRewriting.sln
  - InterceptApp
    - app.aps
    - app.ico
    - app.rc
    - AssemblyInfo.cpp
    - ClrHelper.cpp
    - Clrhelper.h
    - InterceptApp.cpp
    - InterceptApp.vcxproj
    - InterceptApp.vcxproj.filters
    - InterceptApp.vcxproj.user
    - License.html
    - ProfileClrApp.cpp
    - ProfileClrApp.h
    - ProfilerStarter.h
    - ProflerStarter.cpp
    - ReadMe.txt
    - resource.h
    - stdafx.cpp
    - stdafx.h
  - InterceptLib
    - DebugLogger.cs
    - InterceptLib.csproj
    - InterceptLib.snk
    - License.html
    - Properties
      - AssemblyInfo.cs
  - License.html
  - SampleApp1
    - License.html
    - Program.cs
    - Properties
      - AssemblyInfo.cs
    - SampleApp1.csproj
    - SampleApp1.snk
ILRewriting_demo-noexe.zip

��// Microsoft Visual C++ generated resource script.

//

#include "resource.h"



#define APSTUDIO_READONLY_SYMBOLS



/////////////////////////////////////////////////////////////////////////////

#undef APSTUDIO_READONLY_SYMBOLS



/////////////////////////////////////////////////////////////////////////////

// English (United States) resources





/////////////////////////////////////////////////////////////////////////////

//

// Icon

//

// Icon placed first or with lowest ID value becomes application icon

LANGUAGE 9, 1

1           ICON         "app.ico"



#ifdef APSTUDIO_INVOKED

/////////////////////////////////////////////////////////////////////////////

//

// TEXTINCLUDE

//



1 TEXTINCLUDE  

BEGIN

    "resource.h\0"

    "\0"

END



2 TEXTINCLUDE  

BEGIN

    "#include ""afxres.h""\r\n"

    "\0"

END



3 TEXTINCLUDE  

BEGIN

    "\0"

END



#endif    // APSTUDIO_INVOKED



/////////////////////////////////////////////////////////////////////////////







#ifndef APSTUDIO_INVOKED

/////////////////////////////////////////////////////////////////////////////

//

// Generated from the TEXTINCLUDE 3 resource.

//





/////////////////////////////////////////////////////////////////////////////

#endif    // not APSTUDIO_INVOKED

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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.

ILRewriting for beginners

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