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ILRewriting for beginners

, 27 Sep 2012
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-noexe.zip
ILRewriting_demo
ILRewriting_demo.zip
ILRewriteProfiler.dll
InterceptApp.exe
InterceptLib.dll
SampleApp1.exe
ILRewriting_src.zip
ILRewriting_src
ILEmitTest
Properties
ILRewriteProfiler
exports.def
ILRewriteProfiler.vcxproj.filters
ILRewriteProfiler.vcxproj.user
InterceptApp
app.aps
app.ico
InterceptApp.vcxproj.filters
InterceptApp.vcxproj.user
InterceptLib
InterceptLib.snk
Properties
SampleApp1
Properties
SampleApp1.snk

/* this ALWAYS GENERATED file contains the IIDs and CLSIDs */

/* link this file in with the server and any clients */


 /* File created by MIDL compiler version 7.00.0555 */
/* at Sun Sep 09 08:03:26 2012
 */
/* Compiler settings for ILRewriteProfiler.idl:
    Oicf, W1, Zp8, env=Win32 (32b run), target_arch=X86 7.00.0555 
    protocol : dce , ms_ext, c_ext, robust
    error checks: allocation ref bounds_check enum stub_data 
    VC __declspec() decoration level: 
         __declspec(uuid()), __declspec(selectany), __declspec(novtable)
         DECLSPEC_UUID(), MIDL_INTERFACE()
*/
/* @@MIDL_FILE_HEADING(  ) */

#pragma warning( disable: 4049 )  /* more than 64k source lines */


#ifdef __cplusplus
extern "C"{
#endif 


#include <rpc.h>
#include <rpcndr.h>

#ifdef _MIDL_USE_GUIDDEF_

#ifndef INITGUID
#define INITGUID
#include <guiddef.h>
#undef INITGUID
#else
#include <guiddef.h>
#endif

#define MIDL_DEFINE_GUID(type,name,l,w1,w2,b1,b2,b3,b4,b5,b6,b7,b8) \
        DEFINE_GUID(name,l,w1,w2,b1,b2,b3,b4,b5,b6,b7,b8)

#else // !_MIDL_USE_GUIDDEF_

#ifndef __IID_DEFINED__
#define __IID_DEFINED__

typedef struct _IID
{
    unsigned long x;
    unsigned short s1;
    unsigned short s2;
    unsigned char  c[8];
} IID;

#endif // __IID_DEFINED__

#ifndef CLSID_DEFINED
#define CLSID_DEFINED
typedef IID CLSID;
#endif // CLSID_DEFINED

#define MIDL_DEFINE_GUID(type,name,l,w1,w2,b1,b2,b3,b4,b5,b6,b7,b8) \
        const type name = {l,w1,w2,{b1,b2,b3,b4,b5,b6,b7,b8}}

#endif !_MIDL_USE_GUIDDEF_

MIDL_DEFINE_GUID(IID, IID_ILRewriteProfiler,0xC546F9ED,0x7767,0x43A3,0xBC,0xF8,0x87,0x42,0x6C,0x1E,0x13,0x43);


MIDL_DEFINE_GUID(IID, LIBID_ILRewriteProfilerLib,0xF3AE991B,0x7D33,0x42D4,0xB5,0xA0,0x15,0xA9,0x6A,0x8C,0xEC,0x34);


MIDL_DEFINE_GUID(CLSID, CLSID_ILRewriteProfilerImpl,0x941EC77E,0xF7C0,0x42C8,0x84,0xE1,0x15,0xFE,0xFA,0x3C,0xE9,0x6F);

#undef MIDL_DEFINE_GUID

#ifdef __cplusplus
}
#endif



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License

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

About the Author

Mattias Högström
Architect Visma Software AB
Sweden 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.
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