#!+sb-thread
(defun initial-thread-function-trampoline
- (thread setup-sem real-function arguments)
+ (thread setup-sem real-function arguments arg1 arg2 arg3)
;; In time we'll move some of the binding presently done in C here
;; too.
;;
(with-session-lock (*session*)
(push thread (session-threads *session*)))
(setf (thread-%alive-p thread) t)
- (signal-semaphore setup-sem)
+ (when setup-sem (signal-semaphore setup-sem))
;; Using handling-end-of-the-world would be a bit tricky
;; due to other catches and interrupts, so we essentially
;; re-implement it here. Once and only once more.
(without-interrupts
(unwind-protect
(with-local-interrupts
- (sb!unix::unblock-deferrable-signals)
+ (setf *gc-inhibit* nil) ;for foreign callbacks
+ (sb!unix::unblock-deferrable-signals)
(setf (thread-result thread)
(prog1
(cons t
(multiple-value-list
(unwind-protect
(catch '%return-from-thread
- (apply real-function arguments))
+ (if (listp arguments)
+ (apply real-function arguments)
+ (funcall real-function arg1 arg2 arg3)))
(when *exit-in-process*
(sb!impl::call-exit-hooks)))))
#!+sb-safepoint
;; As it is, this lambda must not cons until we are ready
;; to run GC. Be very careful.
(initial-thread-function-trampoline
- thread setup-sem real-function arguments))))
+ thread setup-sem real-function arguments nil nil nil))))
;; If the starting thread is stopped for gc before it signals the
;; semaphore then we'd be stuck.
(assert (not *gc-inhibit*))
"Deprecated. Same as TERMINATE-THREAD."
(terminate-thread thread))
+#!+sb-safepoint
+(defun enter-foreign-callback (arg1 arg2 arg3)
+ (initial-thread-function-trampoline
+ (make-foreign-thread :name "foreign callback")
+ nil #'sb!alien::enter-alien-callback t arg1 arg2 arg3))
+
(defmacro with-interruptions-lock ((thread) &body body)
`(with-system-mutex ((thread-interruptions-lock ,thread))
,@body))
# endif /* !IMMEDIATE_POST_MORTEM */
+/* Note: scribble must be stack-allocated */
static void
-init_new_thread(struct thread *th, init_thread_data *scribble)
+init_new_thread(struct thread *th, init_thread_data *scribble, int guardp)
{
int lock_ret;
}
th->os_thread=thread_self();
- protect_control_stack_guard_page(1, NULL);
+ if (guardp)
+ protect_control_stack_guard_page(1, NULL);
protect_binding_stack_guard_page(1, NULL);
protect_alien_stack_guard_page(1, NULL);
/* Since GC can only know about this thread from the all_threads
* danger of deadlocking even with SIG_STOP_FOR_GC blocked (which
* it is not). */
#ifdef LISP_FEATURE_SB_SAFEPOINT
- *th->csp_around_foreign_call = (lispobj)&lock_ret;
+ *th->csp_around_foreign_call = (lispobj)scribble;
#endif
lock_ret = pthread_mutex_lock(&all_threads_lock);
gc_assert(lock_ret == 0);
TlsSetValue(OUR_TLS_INDEX,NULL);
#endif
+ /* Undo the association of the current pthread to its `struct thread',
+ * such that we can call arch_os_get_current_thread() later in this
+ * thread and cleanly get back NULL. */
+#ifdef LISP_FEATURE_GCC_TLS
+ current_thread = NULL;
+#else
+ pthread_setspecific(specials, NULL);
+#endif
+
schedule_thread_post_mortem(th);
}
lispobj function = th->no_tls_value_marker;
th->no_tls_value_marker = NO_TLS_VALUE_MARKER_WIDETAG;
- init_new_thread(th, &scribble);
+ init_new_thread(th, &scribble, 1);
result = funcall0(function);
undo_init_new_thread(th, &scribble);
return result;
}
+# ifdef LISP_FEATURE_SB_SAFEPOINT
+static struct thread *create_thread_struct(lispobj);
+
+void
+attach_os_thread(init_thread_data *scribble)
+{
+ os_thread_t os = pthread_self();
+ odxprint(misc, "attach_os_thread: attaching to %p", os);
+
+ struct thread *th = create_thread_struct(NIL);
+ block_deferrable_signals(0, &scribble->oldset);
+ th->no_tls_value_marker = NO_TLS_VALUE_MARKER_WIDETAG;
+ /* We don't actually want a pthread_attr here, but rather than add
+ * `if's to the post-mostem, let's just keep that code happy by
+ * keeping it initialized: */
+ pthread_attr_init(th->os_attr);
+
+#ifndef LISP_FEATURE_WIN32
+ /* On windows, arch_os_thread_init will take care of finding the
+ * stack. */
+ pthread_attr_t attr;
+ int pthread_getattr_np(pthread_t, pthread_attr_t *);
+ pthread_getattr_np(os, &attr);
+ void *stack_addr;
+ size_t stack_size;
+ pthread_attr_getstack(&attr, &stack_addr, &stack_size);
+ th->control_stack_start = stack_addr;
+ th->control_stack_end = (void *) (((uintptr_t) stack_addr) + stack_size);
+#endif
+
+ init_new_thread(th, scribble, 0);
+
+ /* We will be calling into Lisp soon, and the functions being called
+ * recklessly ignore the comment in target-thread which says that we
+ * must be careful to not cause GC while initializing a new thread.
+ * Since we first need to create a fresh thread object, it's really
+ * tempting to just perform such unsafe allocation though. So let's
+ * at least try to suppress GC before consing, and hope that it
+ * works: */
+ SetSymbolValue(GC_INHIBIT, T, th);
+
+ uword_t stacksize
+ = (uword_t) th->control_stack_end - (uword_t) th->control_stack_start;
+ odxprint(misc, "attach_os_thread: attached %p as %p (0x%lx bytes stack)",
+ os, th, (long) stacksize);
+}
+
+void
+detach_os_thread(init_thread_data *scribble)
+{
+ struct thread *th = arch_os_get_current_thread();
+ odxprint(misc, "detach_os_thread: detaching");
+
+ undo_init_new_thread(th, scribble);
+
+ odxprint(misc, "deattach_os_thread: detached");
+ pthread_setspecific(lisp_thread, (void *)0);
+ thread_sigmask(SIG_SETMASK, &scribble->oldset, 0);
+}
+# endif /* safepoint */
+
#endif /* LISP_FEATURE_SB_THREAD */
static void
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