about exception type issuse

about exception type issuse

[Guan Jun He]

Dear All

    I write the following code,and get the an unknow exception.Would any
body tell me what the exception is?why it can be catched by
catch(...),but can not be catched by user's code.

best,
Guanjun

code:
#include <stdio.h>
#include <pthread.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdexcept>
#include <ios>
#include <fstream>
#include <csignal>
#include <iostream>
#include <exception>
#include <exception_defines.h>
#include <unwind.h>
typedef unsigned _Unwind_Exception_Class
__attribute__((__mode__(__DI__)));

void *thread(void*)
{
        int i;
        pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, 0);

pthread_setcanceltype(/*PTHREAD_CANCEL_ASYNCHRONOUS*/PTHREAD_CANCEL_DEFERRED, 0);
        try
        {
                for(i=0;/*i<3*/;i++) {
                        //pthread_testcancel();
                        printf("This is a pthread.\n");
                        //pthread_testcancel();
                }
        }catch(.../*_Unwind_Reason_Code &n*//*struct _Unwind_Exception
&b*//*_Unwind_Exception_Class &u*/)
        {
                printf("^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^This
is the child thread: \n");/*%d .\n", n);*/
                //throw;
                //a.what();
                /*do nothing*/
        }
        return 0;
}

int main(void)
{
        pthread_t id;
        int ret;
        ret=pthread_create(&id,NULL, thread,NULL);
        if(ret!=0){
                printf ("Create pthread error!\n");
                exit (1);
        }
        usleep(100);
        printf("********************This is the main thread.\n");
        pthread_cancel(id);
        printf("********************This is the main thread.\n");
        //pthread_join(id,0);
        return (0);
}

RE: about exception type issuse

[John (Eljay) Love-Jensen]

Hi Guanjun,

I compiled and ran your code on my machine.

No unknown exception.

Here's the output:

# g++ test.cpp
# ./a.out 
This is a pthread.
This is a pthread.
********************This is the main thread.
This is a pthread.
********************This is the main thread.
This is a pthread.
This is a pthread.
This is a pthread.
This is a pthread.
This is a pthread.

SIncerely,
--Eljay

RE: about exception type issuse

[Guan Jun He]

Hi Eljay

    Are you using the NPTL?and what's your NPTL(glibc) version and gcc
version?

best,
Guanjun

在 2009-02-17二的 04:37 -0800，John (Eljay) Love-Jensen写道：
> Hi Guanjun,
> 
> I compiled and ran your code on my machine.
> 
> No unknown exception.
> 
> Here's the output:
> 
> # g++ test.cpp
> # ./a.out 
> This is a pthread.
> This is a pthread.
> ********************This is the main thread.
> This is a pthread.
> ********************This is the main thread.
> This is a pthread.
> This is a pthread.
> This is a pthread.
> This is a pthread.
> This is a pthread.
> 
> SIncerely,
> --Eljay