Debugger.cpp

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//====================================================================
//      Debugger.cpp
//--------------------------------------------------------------------
//
//      Package    : System (The LHCb System service)
//
//  Description: Invoke interactively the debugger from a
//               running application
//
//      Author     : M.Frank
//  Created    : 13/1/99
//      Changes    :
//====================================================================
#if defined( _WIN32 )

#  if _MSC_VER < 1500
// This causes a problem with VC9
// http://social.msdn.microsoft.com/Forums/en-US/vcgeneral/thread/cfb5a608-cc6c-49b5-8e9e-6e2cbeef43a3
namespace Win {
#  else
// Empty macro to hide the references to the 'Win' namespace
#    define Win
#  endif

// Avoid conflicts between Windows' headers and MSG.
#  ifndef NOMSG
#    define NOMSG
#    ifndef NOGDI
#      define NOGDI
#    endif
#  endif
#  include "process.h"
#  include "windows.h"

#  if _MSC_VER < 1500
}; // namespace Win
#  endif

#else
#  include <unistd.h>
#endif

// Framework include files
#include "GaudiKernel/Debugger.h"

long System::breakExecution() {
#ifdef _WIN32
  _asm int 3 return 1;
#else
  // I have no clue how to do this in linux
  return 0;
#endif
}

long System::breakExecution( long pid ) {
#ifdef _WIN32
  long result = 0;
  if ( pid == Win::_getpid() ) {
    _asm int 3 return 1;
  } else {
    Win::LPTHREAD_START_ROUTINE fun;
    Win::HANDLE                 th, ph;
    Win::HINSTANCE              mh;
    Win::DWORD                  id;
    mh = Win::LoadLibrary( "Kernel32" );
    if ( 0 != mh ) {
      fun = (Win::LPTHREAD_START_ROUTINE)Win::GetProcAddress( mh, "DebugBreak" );
      if ( 0 != fun ) {
        ph = Win::OpenProcess( PROCESS_ALL_ACCESS, TRUE, pid );
        if ( 0 != ph ) {
          th = Win::CreateRemoteThread( ph, NULL, 0, fun, 0, 0, &id );
          if ( 0 != th ) {
            Win::CloseHandle( th );
            result = 1;
          }
          Win::CloseHandle( ph );
        }
      }
      Win::FreeLibrary( mh );
    }
  }
  if ( result != 1 ) result = Win::GetLastError();
  return result;
#else
  // I have no clue how to do this in linux
  return pid;
#endif
}