Re: [patch 3.4/3.5] libffi & libjava port for hppa-linux

[Randolph Chung <randolph at tausq dot org>]

> Well, it does in libgcj.  The handler in libgcj is written in C++, and
> called in exactly the same way.
> Show me your code.

here you go. thanks.

randolph


#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <iostream>
#include <stdlib.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/ucontext.h>

using namespace std;

void sighandler(int sig)
{
        void **_p = (void **)&sig;
        volatile struct sigcontext_struct *_regs = (struct sigcontext_struct *)++_p;

        _regs->eip += 2;

        cout << "In signal handler; sig = " << sig << endl;
        throw sig;
}

void dosigsegv(void)
{
        char *p = 0;
        void *faultaddr = &&here;

        printf("Triggering SIGSEGV at %p\n", faultaddr);
here:
        *p = 0;
}

int main(int argc, char **argv)
{
        try {
                struct sigaction sact;

                memset(&sact, 0, sizeof(struct sigaction));
                sact.sa_handler = sighandler;
                sigaction(SIGSEGV, &sact, NULL);
                cout << "Signal handler installed. Waiting 1 seconds" << endl;
                sleep(1);

#if 1
                {
                        char *p = 0;

                        *p = 0;
                }
#else
                dosigsegv();
#endif
        }
        catch (int sig)
        {
                cout << "OK; caught expected exception; sig = " << sig << endl;
        }
        catch (...)
        {
                cout << "Oops, got some other exception" << endl;
        }

        return 0;
}

-- 
Randolph Chung
Debian GNU/Linux Developer, hppa/ia64 ports
http://www.tausq.org/