void __cxa_finalize (void *dso_handle)
{
struct exit_function *efp;
int exit_count_snapshot = __exit_count;
/* In reverse order */
while (exit_count_snapshot) {
efp = &__exit_function_table[--exit_count_snapshot];
/*
* We check dso_handle match before we verify the type of the union entry.
* However, the atomic_exchange will validate that we were really "allowed"
* to read dso_handle...
*/
if ((dso_handle == NULL || dso_handle == efp->funcs.cxa_atexit.dso_handle)
/* We don't want to run this cleanup more than once. */
&& !atomic_compare_and_exchange_bool_acq(&efp->type, ef_free, ef_cxa_atexit)
) {
/* glibc passes status (0) too, but that's not in the prototype */
(*efp->funcs.cxa_atexit.func)(efp->funcs.cxa_atexit.arg);
}
}
#if 0 /* haven't looked into this yet... */
/*
* Remove the registered fork handlers. We do not have to
* unregister anything if the program is going to terminate anyway.
*/
#ifdef UNREGISTER_ATFORK
if (d != NULL) {
UNREGISTER_ATFORK (d);
}
#endif
#endif
}
/* If D is non-NULL, call all functions registered with `__cxa_atexit'
with the same dso handle. Otherwise, if D is NULL, call all of the
registered handlers. */
void
__cxa_finalize (void *d)
{
struct exit_function_list *funcs;
restart:
for (funcs = __exit_funcs; funcs; funcs = funcs->next)
{
struct exit_function *f;
for (f = &funcs->fns[funcs->idx - 1]; f >= &funcs->fns[0]; --f)
{
void (*cxafn) (void *arg, int status);
void *cxaarg;
if ((d == NULL || d == f->func.cxa.dso_handle)
/* We don't want to run this cleanup more than once. */
&& (cxafn = f->func.cxa.fn,
cxaarg = f->func.cxa.arg,
! catomic_compare_and_exchange_bool_acq (&f->flavor, ef_free,
ef_cxa)))
{
uint64_t check = __new_exitfn_called;
#ifdef PTR_DEMANGLE
PTR_DEMANGLE (cxafn);
#endif
cxafn (cxaarg, 0);
/* It is possible that that last exit function registered
more exit functions. Start the loop over. */
if (__builtin_expect (check != __new_exitfn_called, 0))
goto restart;
}
}
}
/* Also remove the quick_exit handlers, but do not call them. */
for (funcs = __quick_exit_funcs; funcs; funcs = funcs->next)
{
struct exit_function *f;
for (f = &funcs->fns[funcs->idx - 1]; f >= &funcs->fns[0]; --f)
if (d == NULL || d == f->func.cxa.dso_handle)
f->flavor = ef_free;
}
/* Remove the registered fork handlers. We do not have to
unregister anything if the program is going to terminate anyway. */
#ifdef UNREGISTER_ATFORK
if (d != NULL)
UNREGISTER_ATFORK (d);
#endif
}
/* If D is non-NULL, call all functions registered with `__cxa_atexit'
with the same dso handle. Otherwise, if D is NULL, do nothing. */
void
__cxa_finalize (void *d)
{
struct exit_function_list *funcs;
for (funcs = __exit_funcs; funcs; funcs = funcs->next)
{
struct exit_function *f;
for (f = &funcs->fns[funcs->idx - 1]; f >= &funcs->fns[0]; --f)
if ((d == NULL || d == f->func.cxa.dso_handle)
/* We don't want to run this cleanup more than once. */
&& compare_and_swap (&f->flavor, ef_cxa, ef_free))
(*f->func.cxa.fn) (f->func.cxa.arg, 0);
}
/* Remove the registered fork handlers. */
#ifdef UNREGISTER_ATFORK
UNREGISTER_ATFORK (d);
#endif
}
