1  #include <stdio.h>
       2  #include <windows.h>
       3  #include "testwinlib.h"
       4  
       5  int exceptionCount;
       6  int continueCount;
       7  LONG WINAPI customExceptionHandlder(struct _EXCEPTION_POINTERS *ExceptionInfo)
       8  {
       9      if (ExceptionInfo->ExceptionRecord->ExceptionCode == EXCEPTION_BREAKPOINT)
      10      {
      11          exceptionCount++;
      12          // prepare context to resume execution
      13          CONTEXT *c = ExceptionInfo->ContextRecord;
      14          c->Rip = *(ULONG_PTR *)c->Rsp;
      15          c->Rsp += 8;
      16          return EXCEPTION_CONTINUE_EXECUTION;
      17      }
      18      return EXCEPTION_CONTINUE_SEARCH;
      19  }
      20  LONG WINAPI customContinueHandlder(struct _EXCEPTION_POINTERS *ExceptionInfo)
      21  {
      22      if (ExceptionInfo->ExceptionRecord->ExceptionCode == EXCEPTION_BREAKPOINT)
      23      {
      24          continueCount++;
      25          return EXCEPTION_CONTINUE_EXECUTION;
      26      }
      27      return EXCEPTION_CONTINUE_SEARCH;
      28  }
      29  
      30  void throwFromC()
      31  {
      32      DebugBreak();
      33  }
      34  int main()
      35  {
      36      // simulate a "lazily" attached debugger, by calling some go code before attaching the exception/continue handler
      37      Dummy();
      38      exceptionCount = 0;
      39      continueCount = 0;
      40      void *exceptionHandlerHandle = AddVectoredExceptionHandler(0, customExceptionHandlder);
      41      if (NULL == exceptionHandlerHandle)
      42      {
      43          printf("cannot add vectored exception handler\n");
      44          fflush(stdout);
      45          return 2;
      46      }
      47      void *continueHandlerHandle = AddVectoredContinueHandler(0, customContinueHandlder);
      48      if (NULL == continueHandlerHandle)
      49      {
      50          printf("cannot add vectored continue handler\n");
      51          fflush(stdout);
      52          return 2;
      53      }
      54      CallMeBack(throwFromC);
      55      RemoveVectoredContinueHandler(continueHandlerHandle);
      56      RemoveVectoredExceptionHandler(exceptionHandlerHandle);
      57      printf("exceptionCount: %d\ncontinueCount: %d\n", exceptionCount, continueCount);
      58      fflush(stdout);
      59      return 0;
      60  }