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  Intel Open Source License 
  
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  in binary form must reproduce the above copyright notice, this list of
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  END_LEGAL */
  
  /* ===================================================================== */
  /*! @file
    Replaces pthread_spin_lock(). Linux only, of course.
   */
  
  #include "pin.H"
  #include <iostream>
  #include <fstream>
  #include <stdlib.h>
  #include "tool_macros.h"
  
  using namespace std;
  
  /* ===================================================================== */
  /* Global Variables */
  /* ===================================================================== */
  
  typedef void  (*FUNCPTR)(int status);
  static void  (*pf_exit)(int status);
  
  
  /* ===================================================================== */
  
  INT32 Usage()
  {
      cerr <<
          "This pin tool replaces exit() function in libc\n"
          "\n";
      cerr << KNOB_BASE::StringKnobSummary();
      cerr << endl;
      return -1;
  }
  
  
  /* ===================================================================== */
  
  void MyExit(int arg)
  {
      cout << "MyExit: calling original exit() from libc" << endl;
  
      return (pf_exit)(arg);
  }
  
  
  /* ===================================================================== */
  
  // Called every time a new image is loaded.
  // Look for routines that we want to replace.
  VOID ImageLoad(IMG img, VOID *v)
  {
      RTN rtn = RTN_FindByName(img, C_MANGLE("exit"));
  
      if ( RTN_Valid(rtn))
      {
          //fprintf(stderr, "Attach to prs %d\n", PIN_GetPid());
          //getchar();
          if (RTN_IsSafeForProbedReplacementEx(rtn, PROBE_MODE_ALLOW_RELOCATION))
          {        
              // Save the function pointer that points to the new location of
              // the entry point of the original exit in this image.
              //
              pf_exit = (FUNCPTR)RTN_ReplaceProbedEx( rtn, PROBE_MODE_ALLOW_RELOCATION, AFUNPTR(MyExit));
              
              cout << "ImageLoad: Replaced exit() in: "  << IMG_Name(img) << endl;
      	}
          else
          {
              cout << "ImageLoad: Pin can't replace exit() in: "  << IMG_Name(img) << endl;
              exit(-1);
          }
      }
  }
  
  
  /* ===================================================================== */
  
  int main(int argc, CHAR *argv[])
  {
      PIN_InitSymbols();
  
      if( PIN_Init(argc,argv) )
          return Usage();
  
      IMG_AddInstrumentFunction(ImageLoad, 0);
      
      PIN_StartProgramProbed();
      
      return 0;
  }
  
  
  /* ===================================================================== */
  /* eof */
  /* ===================================================================== */
  