(values
(loop for r from 0 below n
collect
- (let ((r r))
- (sb-thread:make-thread (lambda ()
- (let ((sem semaphore))
- (dotimes (s i)
- (sb-thread:wait-on-semaphore sem))))
- :name "reader")))
+ (sb-thread:make-thread
+ (lambda ()
+ (let ((sem semaphore))
+ (dotimes (s i)
+ (sb-thread:wait-on-semaphore sem))))
+ :name "reader"))
(* n i)))
(make-writers (n readers i)
(let ((j (* readers i)))
(let ((writers
(loop for w from 0 below n
collect
- (let ((w w))
- (sb-thread:make-thread (lambda ()
- (let ((sem semaphore))
- (dotimes (s k)
- (sb-thread:signal-semaphore sem))))
- :name "writer")))))
+ (sb-thread:make-thread
+ (lambda ()
+ (let ((sem semaphore))
+ (dotimes (s k)
+ (sb-thread:signal-semaphore sem))))
+ :name "writer"))))
(assert (zerop rem))
writers)
(+ rem (* n k))))))
(sb-ext:timeout ()
:timeout)))))))
+;;;; Printing waitqueues
+
+#+sb-thread
+(with-test (:name :waitqueue-circle-print)
+ (let* ((*print-circle* nil)
+ (lock (sb-thread:make-mutex))
+ (wq (sb-thread:make-waitqueue)))
+ (sb-thread:with-recursive-lock (lock)
+ (sb-thread:condition-notify wq))
+ ;; Used to blow stack due to recursive structure.
+ (assert (princ-to-string wq))))
+
+;;;; SYMBOL-VALUE-IN-THREAD
+
+(with-test (:name symbol-value-in-thread.1)
+ (let ((* (cons t t)))
+ (assert (eq * (symbol-value-in-thread '* *current-thread*)))
+ (setf (symbol-value-in-thread '* *current-thread*) 123)
+ (assert (= 123 (symbol-value-in-thread '* *current-thread*)))
+ (assert (= 123 *))))
+
+#+sb-thread
+(with-test (:name symbol-value-in-thread.2)
+ (let* ((parent *current-thread*)
+ (semaphore (make-semaphore))
+ (child (make-thread (lambda ()
+ (wait-on-semaphore semaphore)
+ (let ((old (symbol-value-in-thread 'this-is-new parent)))
+ (setf (symbol-value-in-thread 'this-is-new parent) :from-child)
+ old)))))
+ (progv '(this-is-new) '(42)
+ (signal-semaphore semaphore)
+ (assert (= 42 (join-thread child)))
+ (assert (eq :from-child (symbol-value 'this-is-new))))))
+
+;;; Disabled on Darwin due to deadlocks caused by apparent OS specific deadlocks,
+;;; wich _appear_ to be caused by malloc() and free() not being thread safe: an
+;;; interrupted malloc in one thread can apparently block a free in another. There
+;;; are also some indications that pthread_mutex_lock is not re-entrant.
+#+(and sb-thread (not darwin))
+(with-test (:name symbol-value-in-thread.3)
+ (let* ((parent *current-thread*)
+ (semaphore (make-semaphore))
+ (running t)
+ (noise (make-thread (lambda ()
+ (loop while running
+ do (setf * (make-array 1024))
+ ;; Busy-wait a bit so we don't TOTALLY flood the
+ ;; system with GCs: a GC occurring in the middle of
+ ;; S-V-I-T causes it to start over -- we want that
+ ;; to occur occasionally, but not _all_ the time.
+ (loop repeat (random 128)
+ do (setf ** *)))))))
+ (write-string "; ")
+ (dotimes (i 15000)
+ (when (zerop (mod i 200))
+ (write-char #\.)
+ (force-output))
+ (let* ((mom-mark (cons t t))
+ (kid-mark (cons t t))
+ (child (make-thread (lambda ()
+ (wait-on-semaphore semaphore)
+ (let ((old (symbol-value-in-thread 'this-is-new parent)))
+ (setf (symbol-value-in-thread 'this-is-new parent)
+ (make-array 24 :initial-element kid-mark))
+ old)))))
+ (progv '(this-is-new) (list (make-array 24 :initial-element mom-mark))
+ (signal-semaphore semaphore)
+ (assert (eq mom-mark (aref (join-thread child) 0)))
+ (assert (eq kid-mark (aref (symbol-value 'this-is-new) 0))))))
+ (setf running nil)
+ (join-thread noise)))
+
+#+sb-thread
+(with-test (:name symbol-value-in-thread.4)
+ (let* ((parent *current-thread*)
+ (semaphore (make-semaphore))
+ (child (make-thread (lambda ()
+ (wait-on-semaphore semaphore)
+ (symbol-value-in-thread 'this-is-new parent nil)))))
+ (signal-semaphore semaphore)
+ (assert (equal '(nil nil) (multiple-value-list (join-thread child))))))
+
+#+sb-thread
+(with-test (:name symbol-value-in-thread.5)
+ (let* ((parent *current-thread*)
+ (semaphore (make-semaphore))
+ (child (make-thread (lambda ()
+ (wait-on-semaphore semaphore)
+ (handler-case
+ (symbol-value-in-thread 'this-is-new parent)
+ (symbol-value-in-thread-error (e)
+ (list (thread-error-thread e)
+ (cell-error-name e)
+ (sb-thread::symbol-value-in-thread-error-info e))))))))
+ (signal-semaphore semaphore)
+ (assert (equal (list *current-thread* 'this-is-new (list :read :unbound-in-thread))
+ (join-thread child)))))
+
+#+sb-thread
+(with-test (:name symbol-value-in-thread.6)
+ (let* ((parent *current-thread*)
+ (semaphore (make-semaphore))
+ (name (gensym))
+ (child (make-thread (lambda ()
+ (wait-on-semaphore semaphore)
+ (handler-case
+ (setf (symbol-value-in-thread name parent) t)
+ (symbol-value-in-thread-error (e)
+ (list (thread-error-thread e)
+ (cell-error-name e)
+ (sb-thread::symbol-value-in-thread-error-info e))))))))
+ (signal-semaphore semaphore)
+ (let ((res (join-thread child))
+ (want (list *current-thread* name (list :write :no-tls-value))))
+ (unless (equal res want)
+ (error "wanted ~S, got ~S" want res)))))
+
+#+sb-thread
+(with-test (:name symbol-value-in-thread.7)
+ (let ((child (make-thread (lambda ())))
+ (error-occurred nil))
+ (join-thread child)
+ (handler-case
+ (symbol-value-in-thread 'this-is-new child)
+ (symbol-value-in-thread-error (e)
+ (setf error-occurred t)
+ (assert (eq child (thread-error-thread e)))
+ (assert (eq 'this-is-new (cell-error-name e)))
+ (assert (equal (list :read :thread-dead)
+ (sb-thread::symbol-value-in-thread-error-info e)))))
+ (assert error-occurred)))
+
+#+sb-thread
+(with-test (:name symbol-value-in-thread.8)
+ (let ((child (make-thread (lambda ())))
+ (error-occurred nil))
+ (join-thread child)
+ (handler-case
+ (setf (symbol-value-in-thread 'this-is-new child) t)
+ (symbol-value-in-thread-error (e)
+ (setf error-occurred t)
+ (assert (eq child (thread-error-thread e)))
+ (assert (eq 'this-is-new (cell-error-name e)))
+ (assert (equal (list :write :thread-dead)
+ (sb-thread::symbol-value-in-thread-error-info e)))))
+ (assert error-occurred)))
+
+#+sb-thread
+(with-test (:name deadlock-detection.1)
+ (flet ((test (ma mb sa sb)
+ (lambda ()
+ (handler-case
+ (sb-thread:with-mutex (ma)
+ (sb-thread:signal-semaphore sa)
+ (sb-thread:wait-on-semaphore sb)
+ (sb-thread:with-mutex (mb)
+ :ok))
+ (sb-thread:thread-deadlock (e)
+ (princ e)
+ :deadlock)))))
+ (let* ((m1 (sb-thread:make-mutex :name "M1"))
+ (m2 (sb-thread:make-mutex :name "M2"))
+ (s1 (sb-thread:make-semaphore :name "S1"))
+ (s2 (sb-thread:make-semaphore :name "S2"))
+ (t1 (sb-thread:make-thread (test m1 m2 s1 s2) :name "T1"))
+ (t2 (sb-thread:make-thread (test m2 m1 s2 s1) :name "T2")))
+ ;; One will deadlock, and the other will then complete normally
+ (let ((res (list (sb-thread:join-thread t1)
+ (sb-thread:join-thread t2))))
+ (assert (or (equal '(:deadlock :ok) res)
+ (equal '(:ok :deadlock) res)))))))
+
+(with-test (:name deadlock-detection.2)
+ (let* ((m1 (sb-thread:make-mutex :name "M1"))
+ (m2 (sb-thread:make-mutex :name "M2"))
+ (s1 (sb-thread:make-semaphore :name "S1"))
+ (s2 (sb-thread:make-semaphore :name "S2"))
+ (t1 (sb-thread:make-thread
+ (lambda ()
+ (sb-thread:with-mutex (m1)
+ (sb-thread:signal-semaphore s1)
+ (sb-thread:wait-on-semaphore s2)
+ (sb-thread:with-mutex (m2)
+ :ok)))
+ :name "T1")))
+ (prog (err)
+ :retry
+ (handler-bind ((sb-thread:thread-deadlock
+ (lambda (e)
+ (unless err
+ ;; Make sure we can print the condition
+ ;; while it's active
+ (let ((*print-circle* nil))
+ (setf err (princ-to-string e)))
+ (go :retry)))))
+ (when err
+ (sleep 1))
+ (assert (eq :ok (sb-thread:with-mutex (m2)
+ (unless err
+ (sb-thread:signal-semaphore s2)
+ (sb-thread:wait-on-semaphore s1)
+ (sleep 1))
+ (sb-thread:with-mutex (m1)
+ :ok)))))
+ (assert (stringp err)))
+ (assert (eq :ok (sb-thread:join-thread t1)))))
+
+(with-test (:name deadlock-detection.3)
+ (let* ((m1 (sb-thread:make-mutex :name "M1"))
+ (m2 (sb-thread:make-mutex :name "M2"))
+ (s1 (sb-thread:make-semaphore :name "S1"))
+ (s2 (sb-thread:make-semaphore :name "S2"))
+ (t1 (sb-thread:make-thread
+ (lambda ()
+ (sb-thread:with-mutex (m1)
+ (sb-thread:signal-semaphore s1)
+ (sb-thread:wait-on-semaphore s2)
+ (sb-thread:with-mutex (m2)
+ :ok)))
+ :name "T1")))
+ ;; Currently we don't consider it a deadlock
+ ;; if there is a timeout in the chain.
+ (assert (eq :deadline
+ (handler-case
+ (sb-thread:with-mutex (m2)
+ (sb-thread:signal-semaphore s2)
+ (sb-thread:wait-on-semaphore s1)
+ (sleep 1)
+ (sb-sys:with-deadline (:seconds 0.1)
+ (sb-thread:with-mutex (m1)
+ :ok)))
+ (sb-sys:deadline-timeout ()
+ :deadline))))
+ (assert (eq :ok (join-thread t1)))))
projects / sbcl.git / blobdiff