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Message-ID:	<1F8B49DD9100D31195FC00A0C94989FE159624@obelix>
From:	Joost Kraaijeveld <J DOT Kraaijeveld AT Askesis DOT nl>
To:	"Cygwin AT Sourceware. Cygnus. Com (E-mail)"
	<cygwin AT sourceware DOT cygnus DOT com>
Subject:	RE: Exception problems-> this is a bug!
Date:	Tue, 28 Nov 2000 16:22:05 +0100
MIME-Version:	1.0
X-Mailer:	Internet Mail Service (5.5.2448.0)

This program (see below) crashes whenever a function on a separate thread is
called that contains a try{} catch(){} block. I tested with several
compilers (Cygwin, MingW, IBM Visual Age, MS Visual C++ and Metrowerks) and
only CygWin (latest release of all software) crashes. I think that the stack
of the thread is not cleaned up correctly.

Is there a workaround availalbe of some kind??
 
Joost Kraaijeveld
Askesis B.V.
Molukkenstraat 14
6524NB Nijmegen
tel: 024-3888063 / 06-51855277
fax: 024-3608416
email: J DOT Kraaijeveld AT Askesis DOT nl
web: www.askesis.nl 
 
////////////// source ///////////////////

#include <cstdio>
#include <cstdlib>
#include <windows.h>

extern "C" unsigned long WINAPI runFunction1(void* aAThreadFunction)
{
   for ( unsigned long i = 0;i<5;i++)
   {
      printf("%lu\n",i);
      Sleep(200);
   }
   return 0;
}

extern "C" unsigned long WINAPI runFunction2(void* aAThreadFunction)
{
   try
   {
      for ( unsigned long i = 0;i<5;i++)
      {
         printf("%lu\n",i);
         Sleep(200);
      }
   }
   catch(...)
   {
   }
   return 0;
}

class ATest
{
   public:
      void print()
      {
         runFunction2(0);
      }
};

extern "C" unsigned long WINAPI runFunction3(void* aAThreadFunction)
{
   ATest t;
   t.print();
   return 0;
}

int main(int argc, char* argv[])
{
   LPTHREAD_START_ROUTINE threadFunction;

   // No arguments, run runFunction1
   if(argc == 1)
   {
      threadFunction = runFunction1;
   }else  if(argc == 2)
   {
      unsigned long functionNumber = atoi(argv[1]);
      switch(functionNumber)
      {
         case 1:
         {
            threadFunction = runFunction1;
            break;
         }
         case 2:
         {
            threadFunction = runFunction2;
            break;
         }
         case 3:
         {
            threadFunction = runFunction3;
            break;
         }
      }
   }else
   {
      printf("Run this program with 0 or 1 argument(s), see source\n ");
      return 1;
   }

   HANDLE threadHandles[2];
   unsigned long threadIds[2];

   // Create two threads
   threadHandles[0] = CreateThread(
NULL,0,threadFunction,NULL,0,&threadIds[0]);
   threadHandles[1] = CreateThread(
NULL,0,threadFunction,NULL,0,&threadIds[1]);

   // Wait for the threads to end
  WaitForMultipleObjects(2,&threadHandles[0],true,INFINITE);

  return 0;
}

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