From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <pthreads-win32-return-1208-listarch-pthreads-win32=sources.redhat.com@sourceware.org>
Received: (qmail 21202 invoked by alias); 7 Jan 2008 15:12:06 -0000
Received: (qmail 21192 invoked by uid 22791); 7 Jan 2008 15:12:05 -0000
X-Spam-Check-By: sourceware.org
Received: from amber.ccs.neu.edu (HELO amber.ccs.neu.edu) (129.10.116.51)     by sourceware.org (qpsmtpd/0.31) with ESMTP; Mon, 07 Jan 2008 15:11:42 +0000
Received: from c-67-166-126-219.hsd1.ut.comcast.net ([67.166.126.219] helo=welcome.tohell) 	by amber.ccs.neu.edu with esmtpsa (TLSv1:DHE-RSA-AES256-SHA:256) 	(Exim 4.50) 	id 1JBtdc-0006eG-5C 	for pthreads-win32@sourceware.org; Mon, 07 Jan 2008 10:11:40 -0500
Message-ID: <47824161.7000506@ccs.neu.edu>
Date: Mon, 07 Jan 2008 15:12:00 -0000
From: Jon Rafkind <workmin@ccs.neu.edu>
User-Agent: Thunderbird 2.0.0.9 (X11/20071121)
MIME-Version: 1.0
To: pthreads-win32@sourceware.org
Subject: pthreads and exceptions
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
X-IsSubscribed: yes
Mailing-List: contact pthreads-win32-help@sourceware.org; run by ezmlm
Precedence: bulk
List-Id: <pthreads-win32.sourceware.org>
List-Subscribe: <mailto:pthreads-win32-subscribe@sourceware.org>
List-Archive: <http://sourceware.org/ml/pthreads-win32/>
List-Post: <mailto:pthreads-win32@sourceware.org>
List-Help: <mailto:pthreads-win32-help@sourceware.org>, <http://sourceware.org/ml/#faqs>
Sender: pthreads-win32-owner@sourceware.org
X-SW-Source: 2008/txt/msg00000.txt.bz2

Hi,
    I am experiencing an issue with pthreads 2.8.0 and c++ exceptions.
If main spawns thread A and thread A spawns thread B then thread A
throws an exception and tries to catch it, thread B will actually catch
it. I have tried libpthreadGC2.dll and libpthreadGCE2.dll but the
behavior is the same. Is there a way to make right the stack unwinding
behavior match that as on Linux?

Here is an example program which shows the behavior:

#include <stdio.h>
#include <exception>
#include <pthread.h>

using namespace std;

class Fex: public exception{
public:
        Fex():exception(){}
};

void * d1_child( void * x ){
        try{
                int i;
                printf( "d1 child running\n" );
                for ( i = 0; i < 200000000; i++ ){
                }
        } catch ( const Fex & f ){
                printf( "d1 child fex\n" );
        }
        printf( "d1 child done\n" );
}

void * d1( void * x ){
        try{
                pthread_t child;
                pthread_create( &child, NULL, d1_child, NULL );
                int i;
                for ( i = 0; i < 100000000; i++ ){
                }
                printf( "d1 throwing fex\n" );
                throw Fex();
                pthread_join( child, NULL );
                printf( "d1 joined child\n" );
        } catch ( const Fex & f ){
                printf( "d1 fex\n" );
        }
        printf( "d1 done\n" );
        return NULL;
}

void * d2( void * x ){
        try{
                throw Fex();
        } catch ( const Fex & f ){
                printf( "d2 fex\n" );
        }
        return NULL;
}

int main(){
        pthread_t n1, n2;
        pthread_create( &n1, NULL, d1, NULL );
        pthread_create( &n2, NULL, d2, NULL );

        pthread_join( n1, NULL );
        pthread_join( n2, NULL );
}

This will print

d2 fex
d1 child running
d1 throwing fex
d1 child fex
d1 child done

thanks,
jon