Bug#489066: glibc: dlclose() from threaded program on GNU/kFreeBSD segfaults

[Petr Salinger <Petr.Salinger@seznam.cz>]

Package: glibc
Severity: wishlist
Version: 2.7-12
User: glibc-bsd-devel@lists.alioth.debian.org
Usertags: kfreebsd


Hi,

the code bellow crashes on GNU/kFreeBSD.

It crashes from both initial thread and created thread,
but a thread have to be created (thread manager have to be started),
it does not crash without RTLD_GLOBAL, loaded lib
(i.e. /lib/libutil.so.1) is not important.

It might be GNU/kFreeBSD specific or linuxthreads specific.
Please, could you test whether it crashes also on hppa ?

Thanks in advance

                        Petr



/* gcc a.c -ldl -pthread -O2 */

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

void *p;

int dl(void)
{
    p = dlopen("/lib/libutil.so.1", RTLD_NOW | RTLD_GLOBAL);
    printf("dlopen: %p\n",p);
    dlclose(p);
    printf("dlclose: %p\n",p);
};

int sl(void)
{
    sleep(5);
}

int main()
{
pthread_t r;
#if 0
pthread_create(&r, NULL,dl,NULL);
sleep(1);
#else
pthread_create(&r, NULL,sl,NULL);
sleep(1);
dl();
#endif
}