/*
* Threaded process initialization.
*
* This is only called under two conditions:
*
* 1) Some thread routines have detected that the library hasn't yet
* been initialized (_thr_initial == NULL && curthread == NULL), or
*
* 2) An explicit call to reinitialize after a fork (indicated
* by curthread != NULL)
*/
void
_libpthread_init(struct pthread *curthread)
{
int first, dlopened;
/* Check if this function has already been called: */
if (_thr_initial != NULL && curthread == NULL)
/* Only initialize the threaded application once. */
return;
/*
* Check the size of the jump table to make sure it is preset
* with the correct number of entries.
*/
if (sizeof(jmp_table) != sizeof(pthread_func_t) * PJT_MAX * 2)
PANIC("Thread jump table not properly initialized");
memcpy(__thr_jtable, jmp_table, sizeof(jmp_table));
__thr_interpose_libc();
/* Initialize pthread private data. */
init_private();
/* Set the initial thread. */
if (curthread == NULL) {
first = 1;
/* Create and initialize the initial thread. */
curthread = _thr_alloc(NULL);
if (curthread == NULL)
PANIC("Can't allocate initial thread");
init_main_thread(curthread);
} else {
first = 0;
}
/*
* Add the thread to the thread list queue.
*/
THR_LIST_ADD(curthread);
_thread_active_threads = 1;
/* Setup the thread specific data */
_tcb_set(curthread->tcb);
if (first) {
_thr_initial = curthread;
dlopened = _rtld_is_dlopened(&_thread_autoinit_dummy_decl) != 0;
_thr_signal_init(dlopened);
if (_thread_event_mask & TD_CREATE)
_thr_report_creation(curthread, curthread);
/*
* Always use our rtld lock implementation.
* It is faster because it postpones signal handlers
* instead of calling sigprocmask(2).
*/
_thr_rtld_init();
}
}
/*
* This is called when the first thread (other than the initial
* thread) is created.
*/
int
_thr_setthreaded(int threaded)
{
if (((threaded == 0) ^ (__isthreaded == 0)) == 0)
return (0);
__isthreaded = threaded;
if (threaded != 0) {
_thr_rtld_init();
} else {
_thr_rtld_fini();
}
return (0);
}
/*
* Threaded process initialization.
*
* This is only called under two conditions:
*
* 1) Some thread routines have detected that the library hasn't yet
* been initialized (_thr_initial == NULL && curthread == NULL), or
*
* 2) An explicit call to reinitialize after a fork (indicated
* by curthread != NULL)
*/
void
_libpthread_init(struct pthread *curthread)
{
int fd, first, dlopened;
/* Check if this function has already been called: */
if ((_thr_initial != NULL) && (curthread == NULL))
/* Only initialize the threaded application once. */
return;
/*
* Check the size of the jump table to make sure it is preset
* with the correct number of entries.
*/
if (sizeof(jmp_table) != (sizeof(pthread_func_t) * PJT_MAX * 2))
PANIC("Thread jump table not properly initialized");
memcpy(__thr_jtable, jmp_table, sizeof(jmp_table));
__thr_interpose_libc();
/*
* Check for the special case of this process running as
* or in place of init as pid = 1:
*/
if ((_thr_pid = getpid()) == 1) {
/*
* Setup a new session for this process which is
* assumed to be running as root.
*/
if (setsid() == -1)
PANIC("Can't set session ID");
if (revoke(_PATH_CONSOLE) != 0)
PANIC("Can't revoke console");
if ((fd = __sys_openat(AT_FDCWD, _PATH_CONSOLE, O_RDWR)) < 0)
PANIC("Can't open console");
if (setlogin("root") == -1)
PANIC("Can't set login to root");
if (_ioctl(fd, TIOCSCTTY, (char *) NULL) == -1)
PANIC("Can't set controlling terminal");
}
/* Initialize pthread private data. */
init_private();
/* Set the initial thread. */
if (curthread == NULL) {
first = 1;
/* Create and initialize the initial thread. */
curthread = _thr_alloc(NULL);
if (curthread == NULL)
PANIC("Can't allocate initial thread");
init_main_thread(curthread);
} else {
first = 0;
}
/*
* Add the thread to the thread list queue.
*/
THR_LIST_ADD(curthread);
_thread_active_threads = 1;
/* Setup the thread specific data */
_tcb_set(curthread->tcb);
if (first) {
_thr_initial = curthread;
dlopened = _rtld_is_dlopened(&_thread_autoinit_dummy_decl) != 0;
_thr_signal_init(dlopened);
if (_thread_event_mask & TD_CREATE)
_thr_report_creation(curthread, curthread);
/*
* Always use our rtld lock implementation.
* It is faster because it postpones signal handlers
* instead of calling sigprocmask(2).
*/
_thr_rtld_init();
}
}
