1 ;;;; miscellaneous tests of thread stuff
3 ;;;; This software is part of the SBCL system. See the README file for
6 ;;;; While most of SBCL is derived from the CMU CL system, the test
7 ;;;; files (like this one) were written from scratch after the fork
10 ;;;; This software is in the public domain and is provided with
11 ;;;; absoluely no warranty. See the COPYING and CREDITS files for
12 ;;;; more information.
14 #-sb-thread (quit :unix-status 104)
16 (in-package "SB-THREAD") ; this is white-box testing, really
18 (let ((old-threads (list-all-threads))
19 (thread (make-thread (lambda ()
20 (assert (find *current-thread* *all-threads*))
22 (new-threads (list-all-threads)))
23 (assert (thread-alive-p thread))
24 (assert (eq thread (first new-threads)))
25 (assert (= (1+ (length old-threads)) (length new-threads)))
27 (assert (not (thread-alive-p thread))))
29 ;;; We had appalling scaling properties for a while. Make sure they
31 (defun scaling-test (function &optional (nthreads 5))
32 "Execute FUNCTION with NTHREADS lurking to slow it down."
33 (let ((queue (sb-thread:make-waitqueue))
34 (mutex (sb-thread:make-mutex)))
35 ;; Start NTHREADS idle threads.
37 (sb-thread:make-thread (lambda ()
38 (sb-thread:condition-wait queue mutex)
40 (let ((start-time (get-internal-run-time)))
42 (prog1 (- (get-internal-run-time) start-time)
43 (sb-thread:condition-broadcast queue)))))
45 "A function that does work with the CPU."
46 (if (zerop n) 1 (* n (fact (1- n)))))
47 (let ((work (lambda () (fact 15000))))
48 (let ((zero (scaling-test work 0))
49 (four (scaling-test work 4)))
50 ;; a slightly weak assertion, but good enough for starters.
51 (assert (< four (* 1.5 zero)))))
53 ;;; For one of the interupt-thread tests, we want a foreign function
54 ;;; that does not make syscalls
56 (with-open-file (o "threads-foreign.c" :direction :output :if-exists :supersede)
57 (format o "void loop_forever() { while(1) ; }~%"))
60 (or #+linux '("-shared" "-o" "threads-foreign.so" "threads-foreign.c")
61 (error "Missing shared library compilation options for this platform"))
63 (sb-alien:load-shared-object "threads-foreign.so")
64 (sb-alien:define-alien-routine loop-forever sb-alien:void)
67 ;;; elementary "can we get a lock and release it again"
68 (let ((l (make-mutex :name "foo"))
70 (assert (eql (mutex-value l) nil) nil "1")
71 (assert (eql (mutex-lock l) 0) nil "2")
72 (sb-thread:get-mutex l)
73 (assert (eql (mutex-value l) p) nil "3")
74 (assert (eql (mutex-lock l) 0) nil "4")
75 (sb-thread:release-mutex l)
76 (assert (eql (mutex-value l) nil) nil "5")
77 (assert (eql (mutex-lock l) 0) nil "6")
80 (let ((l (make-waitqueue :name "spinlock"))
82 (assert (eql (waitqueue-lock l) 0) nil "1")
84 (assert (eql (waitqueue-lock l) p) nil "2"))
85 (assert (eql (waitqueue-lock l) 0) nil "3")
88 ;; test that SLEEP actually sleeps for at least the given time, even
89 ;; if interrupted by another thread exiting/a gc/anything
90 (let ((start-time (get-universal-time)))
91 (make-thread (lambda () (sleep 1) (sb-ext:gc :full t)))
93 (assert (>= (get-universal-time) (+ 5 start-time))))
96 (let ((queue (make-waitqueue :name "queue"))
97 (lock (make-mutex :name "lock")))
98 (labels ((in-new-thread ()
100 (assert (eql (mutex-value lock) *current-thread*))
101 (format t "~A got mutex~%" *current-thread*)
102 ;; now drop it and sleep
103 (condition-wait queue lock)
104 ;; after waking we should have the lock again
105 (assert (eql (mutex-value lock) *current-thread*)))))
106 (make-thread #'in-new-thread)
107 (sleep 2) ; give it a chance to start
108 ;; check the lock is free while it's asleep
109 (format t "parent thread ~A~%" *current-thread*)
110 (assert (eql (mutex-value lock) nil))
111 (assert (eql (mutex-lock lock) 0))
113 (condition-notify queue))
116 (let ((queue (make-waitqueue :name "queue"))
117 (lock (make-mutex :name "lock")))
118 (labels ((ours-p (value)
119 (sb-vm:control-stack-pointer-valid-p
120 (sb-sys:int-sap (sb-kernel:get-lisp-obj-address value))))
122 (with-recursive-lock (lock)
123 (assert (ours-p (mutex-value lock)))
124 (format t "~A got mutex~%" (mutex-value lock))
125 ;; now drop it and sleep
126 (condition-wait queue lock)
127 ;; after waking we should have the lock again
128 (format t "woken, ~A got mutex~%" (mutex-value lock))
129 (assert (ours-p (mutex-value lock))))))
130 (make-thread #'in-new-thread)
131 (sleep 2) ; give it a chance to start
132 ;; check the lock is free while it's asleep
133 (format t "parent thread ~A~%" *current-thread*)
134 (assert (eql (mutex-value lock) nil))
135 (assert (eql (mutex-lock lock) 0))
136 (with-recursive-lock (lock)
137 (condition-notify queue))
140 (let ((mutex (make-mutex :name "contended")))
142 (let ((me *current-thread*))
146 (assert (eql (mutex-value mutex) me)))
147 (assert (not (eql (mutex-value mutex) me))))
148 (format t "done ~A~%" *current-thread*))))
149 (let ((kid1 (make-thread #'run))
150 (kid2 (make-thread #'run)))
151 (format t "contention ~A ~A~%" kid1 kid2))))
153 (defun test-interrupt (function-to-interrupt &optional quit-p)
154 (let ((child (make-thread function-to-interrupt)))
155 ;;(format t "gdb ./src/runtime/sbcl ~A~%attach ~A~%" child child)
157 (format t "interrupting child ~A~%" child)
158 (interrupt-thread child
160 (format t "child pid ~A~%" *current-thread*)
161 (when quit-p (sb-ext:quit))))
165 ;; separate tests for (a) interrupting Lisp code, (b) C code, (c) a syscall,
166 ;; (d) waiting on a lock, (e) some code which we hope is likely to be
169 (let ((child (test-interrupt (lambda () (loop))))) (terminate-thread child))
171 (test-interrupt #'loop-forever :quit)
173 (let ((child (test-interrupt (lambda () (loop (sleep 2000))))))
174 (terminate-thread child))
176 (let ((lock (make-mutex :name "loctite"))
179 (setf child (test-interrupt
182 (assert (eql (mutex-value lock) *current-thread*)))
183 (assert (not (eql (mutex-value lock) *current-thread*)))
185 ;;hold onto lock for long enough that child can't get it immediately
187 (interrupt-thread child (lambda () (format t "l ~A~%" (mutex-value lock))))
188 (format t "parent releasing lock~%"))
189 (terminate-thread child))
191 (format t "~&locking test done~%")
193 (defun alloc-stuff () (copy-list '(1 2 3 4 5)))
196 (let ((thread (sb-thread:make-thread (lambda () (loop (alloc-stuff))))))
198 (loop repeat 4 collect
199 (sb-thread:make-thread
205 (sb-thread:interrupt-thread
208 (loop while (some #'thread-alive-p killers) do (sleep 0.1))
209 (sb-thread:terminate-thread thread)))
212 (format t "~&multi interrupt test done~%")
214 (let ((c (make-thread (lambda () (loop (alloc-stuff))))))
215 ;; NB this only works on x86: other ports don't have a symbol for
216 ;; pseudo-atomic atomicity
217 (format t "new thread ~A~%" c)
222 (princ ".") (force-output)
223 (assert (eq (thread-state *current-thread*) :running))
224 (assert (zerop SB-KERNEL:*PSEUDO-ATOMIC-ATOMIC*)))))
225 (terminate-thread c))
227 (format t "~&interrupt test done~%")
229 (defparameter *interrupt-count* 0)
231 (declaim (notinline check-interrupt-count))
232 (defun check-interrupt-count (i)
233 (declare (optimize (debug 1) (speed 1)))
234 ;; This used to lose if eflags were not restored after an interrupt.
235 (unless (typep i 'fixnum)
236 (error "!!!!!!!!!!!")))
238 (let ((c (make-thread
240 (handler-bind ((error #'(lambda (cond)
243 most-positive-fixnum))))
244 (loop (check-interrupt-count *interrupt-count*)))))))
245 (let ((func (lambda ()
248 (sb-impl::atomic-incf/symbol *interrupt-count*))))
249 (setq *interrupt-count* 0)
252 (interrupt-thread c func))
254 (assert (= 100 *interrupt-count*))
255 (terminate-thread c)))
257 (format t "~&interrupt count test done~%")
260 (make-thread (lambda ()
262 (sb-ext:gc) (princ "\\") (force-output))
264 (make-thread (lambda ()
267 (princ "/") (force-output))
270 (when (and a-done b-done) (return))
275 (defun waste (&optional (n 100000))
276 (loop repeat n do (make-string 16384)))
278 (loop for i below 100 do
281 (sb-thread:make-thread
289 (defparameter *aaa* nil)
290 (loop for i below 100 do
293 (sb-thread:make-thread
295 (let ((*aaa* (waste)))
297 (let ((*aaa* (waste)))
301 (format t "~&gc test done~%")
303 ;; this used to deadlock on session-lock
304 (sb-thread:make-thread (lambda () (sb-ext:gc)))
305 ;; expose thread creation races by exiting quickly
306 (sb-thread:make-thread (lambda ()))
308 (defun exercise-syscall (fn reference-errno)
309 (sb-thread:make-thread
313 (let ((errno (sb-unix::get-errno)))
315 (unless (eql errno reference-errno)
316 (format t "Got errno: ~A (~A) instead of ~A~%"
321 (sb-ext:quit :unix-status 1)))))))
323 (let* ((nanosleep-errno (progn
324 (sb-unix:nanosleep -1 0)
325 (sb-unix::get-errno)))
328 :if-does-not-exist nil)
329 (sb-unix::get-errno)))
332 (exercise-syscall (lambda () (sb-unix:nanosleep -1 0)) nanosleep-errno)
333 (exercise-syscall (lambda () (open "no-such-file"
334 :if-does-not-exist nil))
336 (sb-thread:make-thread (lambda () (loop (sb-ext:gc) (sleep 1)))))))
338 (princ "terminating threads")
339 (dolist (thread threads)
340 (sb-thread:terminate-thread thread)))
342 (format t "~&errno test done~%")
345 (let ((thread (sb-thread:make-thread (lambda () (sleep 0.1)))))
346 (sb-thread:interrupt-thread
349 (assert (find-restart 'sb-thread:terminate-thread))))))
353 (format t "~&thread startup sigmask test done~%")
355 #| ;; a cll post from eric marsden
357 | (setq *debugger-hook*
358 | (lambda (condition old-debugger-hook)
359 | (debug:backtrace 10)
360 | (unix:unix-exit 2)))
362 | (mp::start-sigalrm-yield)
363 | (flet ((roomy () (loop (with-output-to-string (*standard-output*) (room)))))
364 | (mp:make-process #'roomy)
365 | (mp:make-process #'roomy)))
368 ;; give the other thread time to die before we leave, otherwise the
369 ;; overall exit status is 0, not 104
372 (sb-ext:quit :unix-status 104)