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;;;; miscellaneous tests of thread stuff
;;;; This software is part of the SBCL system. See the README file for
;;;; more information.
;;;;
;;;; While most of SBCL is derived from the CMU CL system, the test
;;;; files (like this one) were written from scratch after the fork
;;;; from CMU CL.
;;;
;;;; This software is in the public domain and is provided with
;;;; absoluely no warranty. See the COPYING and CREDITS files for
;;;; more information.
(in-package :cl-user)
(defpackage :thread-test
(:use :cl :sb-thread :sb-ext))
(in-package :thread-test)
(use-package :test-util)
(with-test (:name atomic-update
:skipped-on '(not :sb-thread))
(let ((x (cons :count 0)))
(mapc #'sb-thread:join-thread
(loop repeat 1000
collect (sb-thread:make-thread
(lambda ()
(loop repeat 1000
do (atomic-update (cdr x) #'1+)
(sleep 0.00001))))))
(assert (equal x '(:count . 1000000)))))
(with-test (:name mutex-owner)
;; Make sure basics are sane on unithreaded ports as well
(let ((mutex (make-mutex)))
(grab-mutex mutex)
(assert (eq *current-thread* (mutex-value mutex)))
(handler-bind ((warning #'error))
(release-mutex mutex))
(assert (not (mutex-value mutex)))))
;;; Terminating a thread that's waiting for the terminal.
#+sb-thread
(let ((thread (make-thread (lambda ()
(sb-thread::get-foreground)))))
(sleep 1)
(assert (thread-alive-p thread))
(terminate-thread thread)
(sleep 1)
(assert (not (thread-alive-p thread))))
;;; Condition-wait should not be interruptible under WITHOUT-INTERRUPTS
(with-test (:name without-interrupts+condition-wait
:skipped-on '(not :sb-thread))
(let* ((lock (make-mutex))
(queue (make-waitqueue))
(thread (make-thread (lambda ()
(sb-sys:without-interrupts
(with-mutex (lock)
(condition-wait queue lock)))))))
(sleep 1)
(assert (thread-alive-p thread))
(terminate-thread thread)
(sleep 1)
(assert (thread-alive-p thread))
(condition-notify queue)
(sleep 1)
(assert (not (thread-alive-p thread)))))
;;; GRAB-MUTEX should not be interruptible under WITHOUT-INTERRUPTS
(with-test (:name without-interrupts+grab-mutex :skipped-on '(not :sb-thread))
(let* ((lock (make-mutex))
(bar (progn (grab-mutex lock) nil))
(thread (make-thread (lambda ()
(sb-sys:without-interrupts
(with-mutex (lock)
(setf bar t)))))))
(sleep 1)
(assert (thread-alive-p thread))
(terminate-thread thread)
(sleep 1)
(assert (thread-alive-p thread))
(release-mutex lock)
(sleep 1)
(assert (not (thread-alive-p thread)))
(assert (eq :aborted (join-thread thread :default :aborted)))
(assert bar)))
(with-test (:name parallel-find-class :skipped-on '(not :sb-thread))
(let* ((oops nil)
(threads (loop repeat 10
collect (make-thread (lambda ()
(handler-case
(loop repeat 10000
do (find-class (gensym) nil))
(serious-condition ()
(setf oops t))))))))
(mapcar #'sb-thread:join-thread threads)
(assert (not oops))))
(with-test (:name :semaphore-multiple-waiters :skipped-on '(not :sb-thread))
(let ((semaphore (make-semaphore :name "test sem")))
(labels ((make-readers (n i)
(values
(loop for r from 0 below n
collect
(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)))
(multiple-value-bind (k rem) (truncate j n)
(values
(let ((writers
(loop for w from 0 below n
collect
(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))))))
(test (r w n)
(multiple-value-bind (readers x) (make-readers r n)
(assert (= (length readers) r))
(multiple-value-bind (writers y) (make-writers w r n)
(assert (= (length writers) w))
(assert (= x y))
(mapc #'sb-thread:join-thread writers)
(mapc #'sb-thread:join-thread readers)
(assert (zerop (sb-thread:semaphore-count semaphore)))
(values)))))
(assert
(eq :ok
(handler-case
(sb-ext:with-timeout 10
(test 1 1 100)
(test 2 2 10000)
(test 4 2 10000)
(test 4 2 10000)
(test 10 10 10000)
(test 10 1 10000)
:ok)
(sb-ext:timeout ()
:timeout)))))))
;;;; Printing waitqueues
(with-test (:name :waitqueue-circle-print :skipped-on '(not :sb-thread))
(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 *))))
(with-test (:name symbol-value-in-thread.2 :skipped-on '(not :sb-thread))
(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.
(with-test (:name symbol-value-in-thread.3
:skipped-on '(not :sb-thread))
(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)))
(with-test (:name symbol-value-in-thread.4 :skipped-on '(not :sb-thread))
(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))))))
(with-test (:name symbol-value-in-thread.5 :skipped-on '(not :sb-thread))
(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)))))
(with-test (:name symbol-value-in-thread.6 :skipped-on '(not :sb-thread))
(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)))))
(with-test (:name symbol-value-in-thread.7 :skipped-on '(not :sb-thread))
(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)))
(with-test (:name symbol-value-in-thread.8 :skipped-on '(not :sb-thread))
(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)))
(with-test (:name deadlock-detection.1 :skipped-on '(not :sb-thread))
(loop
repeat 1000
do (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 :skipped-on '(not :sb-thread))
(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 :skipped-on '(not :sb-thread))
(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)
(sb-thread:thread-deadlock ()
:deadlock))))
(assert (eq :ok (join-thread t1)))))
#+sb-thread
(with-test (:name :pass-arguments-to-thread)
(assert (= 3 (join-thread (make-thread #'+ :arguments '(1 2))))))
#+sb-thread
(with-test (:name :pass-atom-to-thread)
(assert (= 1/2 (join-thread (make-thread #'/ :arguments 2)))))
#+sb-thread
(with-test (:name :pass-nil-to-thread)
(assert (= 1 (join-thread (make-thread #'* :arguments '())))))
#+sb-thread
(with-test (:name :pass-nothing-to-thread)
(assert (= 1 (join-thread (make-thread #'*)))))
#+sb-thread
(with-test (:name :pass-improper-list-to-thread)
(multiple-value-bind (value error)
(ignore-errors (make-thread #'+ :arguments '(1 . 1)))
(when value
(join-thread value))
(assert (and (null value)
error))))
(with-test (:name (:wait-for :basics) :fails-on :win32)
(assert (not (sb-ext:wait-for nil :timeout 0.1)))
(assert (eql 42 (sb-ext:wait-for 42)))
(let ((n 0))
(assert (eql 100 (sb-ext:wait-for (when (= 100 (incf n))
n))))))
(with-test (:name (:wait-for :deadline) :fails-on :win32)
(assert (eq :ok
(sb-sys:with-deadline (:seconds 10)
(assert (not (sb-ext:wait-for nil :timeout 0.1)))
:ok)))
(assert (eq :deadline
(handler-case
(sb-sys:with-deadline (:seconds 0.1)
(sb-ext:wait-for nil :timeout 10)
(error "oops"))
(sb-sys:deadline-timeout () :deadline)))))
(with-test (:name (:condition-wait :timeout :one-thread) :fails-on :win32)
(let ((mutex (make-mutex))
(waitqueue (make-waitqueue)))
(assert (not (with-mutex (mutex)
(condition-wait waitqueue mutex :timeout 0.01))))))
(with-test (:name (:condition-wait :timeout :many-threads)
:skipped-on '(not :sb-thread))
(let* ((mutex (make-mutex))
(waitqueue (make-waitqueue))
(sem (make-semaphore))
(data nil)
(workers
(loop repeat 100
collect (make-thread
(lambda ()
(wait-on-semaphore sem)
(block thread
(with-mutex (mutex)
(loop until data
do (or (condition-wait waitqueue mutex :timeout 0.01)
(return-from thread nil)))
(assert (eq t (pop data)))
t)))))))
(loop repeat 50
do (with-mutex (mutex)
(push t data)
(condition-notify waitqueue)))
(signal-semaphore sem 100)
(let ((ok (count-if #'join-thread workers)))
(unless (eql 50 ok)
(error "Wanted 50, got ~S" ok)))))
(with-test (:name (:wait-on-semaphore :timeout :one-thread) :fails-on :win32)
(let ((sem (make-semaphore))
(n 0))
(signal-semaphore sem 10)
(loop repeat 100
do (when (wait-on-semaphore sem :timeout 0.001)
(incf n)))
(assert (= n 10))))
(with-test (:name (:wait-on-semaphore :timeout :many-threads)
:skipped-on '(not :sb-thread))
(let* ((sem (make-semaphore))
(threads
(progn
(signal-semaphore sem 10)
(loop repeat 100
collect (make-thread
(lambda ()
(sleep (random 0.02))
(wait-on-semaphore sem :timeout 0.5)))))))
(loop repeat 5
do (signal-semaphore sem 2))
(let ((ok (count-if #'join-thread threads)))
(unless (eql 20 ok)
(error "Wanted 20, got ~S" ok)))))
(with-test (:name (:join-thread :timeout)
:skipped-on '(not :sb-thread))
(assert (eq :error
(handler-case
(join-thread (make-thread (lambda () (sleep 10))) :timeout 0.01)
(join-thread-error ()
:error))))
(let ((cookie (cons t t)))
(assert (eq cookie
(join-thread (make-thread (lambda () (sleep 10)))
:timeout 0.01
:default cookie)))))
(with-test (:name (:semaphore-notification :wait-on-semaphore)
:skipped-on '(not :sb-thread))
(let ((sem (make-semaphore))
(ok nil)
(n 0))
(flet ((critical ()
(let ((note (make-semaphore-notification)))
(sb-sys:without-interrupts
(unwind-protect
(progn
(sb-sys:with-local-interrupts
(wait-on-semaphore sem :notification note)
(sleep (random 0.1)))
(incf n))
;; Re-increment on exit if we decremented it.
(when (semaphore-notification-status note)
(signal-semaphore sem))
;; KLUDGE: Prevent interrupts after this point from
;; unwinding us, so that we can reason about the counts.
#+sb-thread
(sb-thread::block-deferrable-signals))))))
(let* ((threads (loop for i from 1 upto 100
collect (make-thread #'critical :name (format nil "T~A" i))))
(safe nil)
(unsafe nil)
(interruptor (make-thread (lambda ()
(loop until ok)
(let (x)
(dolist (thread threads)
(cond (x
(push thread unsafe)
(sleep (random 0.1))
(ignore-errors
(terminate-thread thread)))
(t
(push thread safe)))
(setf x (not x))))))))
(signal-semaphore sem)
(setf ok t)
(join-thread interruptor)
(mapc #'join-thread safe)
(let ((k (count-if (lambda (th)
(join-thread th :default nil))
unsafe)))
(assert (= n (+ k (length safe))))
(assert unsafe))))))
(with-test (:name (:semaphore-notification :try-sempahore)
:skipped-on '(not :sb-thread))
(let* ((sem (make-semaphore))
(note (make-semaphore-notification)))
(try-semaphore sem 1 note)
(assert (not (semaphore-notification-status note)))
(signal-semaphore sem)
(try-semaphore sem 1 note)
(assert (semaphore-notification-status note))))
(with-test (:name (:return-from-thread :normal-thread)
:skipped-on '(not :sb-thread))
(let* ((thread (make-thread (lambda ()
(return-from-thread (values 1 2 3))
:foo)))
(values (multiple-value-list (join-thread thread))))
(unless (equal (list 1 2 3) values)
(error "got ~S, wanted (1 2 3)" values))))
(with-test (:name (:return-from-thread :main-thread))
(assert (main-thread-p))
(assert (eq :oops
(handler-case
(return-from-thread t)
(thread-error ()
:oops)))))
(with-test (:name (:abort-thread :normal-thread)
:skipped-on '(not :sb-thread))
(let ((thread (make-thread (lambda ()
(abort-thread)
:foo))))
(assert (eq :aborted! (join-thread thread :default :aborted!)))))
(with-test (:name (:abort-thread :main-thread))
(assert (main-thread-p))
(assert (eq :oops
(handler-case
(abort-thread)
(thread-error ()
:oops)))))