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 ;;; We had appalling scaling properties for a while. Make sure they
20 (defun scaling-test (function &optional (nthreads 5))
21 "Execute FUNCTION with NTHREADS lurking to slow it down."
22 (let ((queue (sb-thread:make-waitqueue))
23 (mutex (sb-thread:make-mutex)))
24 ;; Start NTHREADS idle threads.
26 (sb-thread:make-thread (lambda ()
27 (sb-thread:condition-wait queue mutex)
29 (let ((start-time (get-internal-run-time)))
31 (prog1 (- (get-internal-run-time) start-time)
32 (sb-thread:condition-broadcast queue)))))
34 "A function that does work with the CPU."
35 (if (zerop n) 1 (* n (fact (1- n)))))
36 (let ((work (lambda () (fact 15000))))
37 (let ((zero (scaling-test work 0))
38 (four (scaling-test work 4)))
39 ;; a slightly weak assertion, but good enough for starters.
40 (assert (< four (* 1.5 zero)))))
42 ;;; For one of the interupt-thread tests, we want a foreign function
43 ;;; that does not make syscalls
45 (with-open-file (o "threads-foreign.c" :direction :output :if-exists :supersede)
46 (format o "void loop_forever() { while(1) ; }~%"))
49 (or #+linux '("-shared" "-o" "threads-foreign.so" "threads-foreign.c")
50 (error "Missing shared library compilation options for this platform"))
52 (sb-alien:load-shared-object "threads-foreign.so")
53 (sb-alien:define-alien-routine loop-forever sb-alien:void)
56 ;;; elementary "can we get a lock and release it again"
57 (let ((l (make-mutex :name "foo"))
58 (p (current-thread-id)))
59 (assert (eql (mutex-value l) nil) nil "1")
60 (assert (eql (mutex-lock l) 0) nil "2")
61 (sb-thread:get-mutex l)
62 (assert (eql (mutex-value l) p) nil "3")
63 (assert (eql (mutex-lock l) 0) nil "4")
64 (sb-thread:release-mutex l)
65 (assert (eql (mutex-value l) nil) nil "5")
66 (assert (eql (mutex-lock l) 0) nil "6")
69 ;; test that SLEEP actually sleeps for at least the given time, even
70 ;; if interrupted by another thread exiting/a gc/anything
71 (let ((start-time (get-universal-time)))
72 (make-thread (lambda () (sleep 1))) ; kid waits 1 then dies ->SIG_THREAD_EXIT
74 (assert (>= (get-universal-time) (+ 5 start-time))))
77 (let ((queue (make-waitqueue :name "queue"))
78 (lock (make-mutex :name "lock")))
79 (labels ((in-new-thread ()
81 (assert (eql (mutex-value lock) (current-thread-id)))
82 (format t "~A got mutex~%" (current-thread-id))
83 ;; now drop it and sleep
84 (condition-wait queue lock)
85 ;; after waking we should have the lock again
86 (assert (eql (mutex-value lock) (current-thread-id))))))
87 (make-thread #'in-new-thread)
88 (sleep 2) ; give it a chance to start
89 ;; check the lock is free while it's asleep
90 (format t "parent thread ~A~%" (current-thread-id))
91 (assert (eql (mutex-value lock) nil))
92 (assert (eql (mutex-lock lock) 0))
94 (condition-notify queue))
97 (let ((queue (make-waitqueue :name "queue"))
98 (lock (make-mutex :name "lock")))
99 (labels ((ours-p (value)
100 (sb-vm:control-stack-pointer-valid-p
101 (sb-sys:int-sap (sb-kernel:get-lisp-obj-address value))))
103 (with-recursive-lock (lock)
104 (assert (ours-p (mutex-value lock)))
105 (format t "~A got mutex~%" (mutex-value lock))
106 ;; now drop it and sleep
107 (condition-wait queue lock)
108 ;; after waking we should have the lock again
109 (format t "woken, ~A got mutex~%" (mutex-value lock))
110 (assert (ours-p (mutex-value lock))))))
111 (make-thread #'in-new-thread)
112 (sleep 2) ; give it a chance to start
113 ;; check the lock is free while it's asleep
114 (format t "parent thread ~A~%" (current-thread-id))
115 (assert (eql (mutex-value lock) nil))
116 (assert (eql (mutex-lock lock) 0))
117 (with-recursive-lock (lock)
118 (condition-notify queue))
121 (let ((mutex (make-mutex :name "contended")))
123 (let ((me (current-thread-id)))
127 (assert (eql (mutex-value mutex) me)))
128 (assert (not (eql (mutex-value mutex) me))))
129 (format t "done ~A~%" (current-thread-id)))))
130 (let ((kid1 (make-thread #'run))
131 (kid2 (make-thread #'run)))
132 (format t "contention ~A ~A~%" kid1 kid2))))
134 (defun test-interrupt (function-to-interrupt &optional quit-p)
135 (let ((child (make-thread function-to-interrupt)))
136 ;;(format t "gdb ./src/runtime/sbcl ~A~%attach ~A~%" child child)
138 (format t "interrupting child ~A~%" child)
139 (interrupt-thread child
141 (format t "child pid ~A~%" (current-thread-id))
142 (when quit-p (sb-ext:quit))))
146 ;;; separate tests for (a) interrupting Lisp code, (b) C code, (c) a syscall,
147 ;;; (d) waiting on a lock, (e) some code which we hope is likely to be
150 (let ((child (test-interrupt (lambda () (loop))))) (terminate-thread child))
152 (test-interrupt #'loop-forever :quit)
154 (let ((child (test-interrupt (lambda () (loop (sleep 2000))))))
155 (terminate-thread child))
157 (let ((lock (make-mutex :name "loctite"))
160 (setf child (test-interrupt
163 (assert (eql (mutex-value lock) (current-thread-id))))
164 (assert (not (eql (mutex-value lock) (current-thread-id))))
166 ;;hold onto lock for long enough that child can't get it immediately
168 (interrupt-thread child (lambda () (format t "l ~A~%" (mutex-value lock))))
169 (format t "parent releasing lock~%"))
170 (terminate-thread child))
172 (defun alloc-stuff () (copy-list '(1 2 3 4 5)))
174 (let ((c (test-interrupt (lambda () (loop (alloc-stuff))))))
175 ;; NB this only works on x86: other ports don't have a symbol for
176 ;; pseudo-atomic atomicity
177 (format t "new thread ~A~%" c)
182 (princ ".") (force-output)
183 (assert (zerop SB-KERNEL:*PSEUDO-ATOMIC-ATOMIC*)))))
184 (terminate-thread c))
187 (defparameter *interrupt-count* 0)
189 (declaim (notinline check-interrupt-count))
190 (defun check-interrupt-count (i)
191 (declare (optimize (debug 1) (speed 1)))
192 ;; This used to lose if eflags were not restored after an interrupt.
193 (unless (typep i 'fixnum)
194 (error "!!!!!!!!!!!")))
196 (let ((c (make-thread
198 (handler-bind ((error #'(lambda (cond)
201 most-positive-fixnum))))
202 (loop (check-interrupt-count *interrupt-count*)))))))
203 (let ((func (lambda ()
206 (sb-impl::atomic-incf/symbol *interrupt-count*))))
207 (sb-sys:with-pinned-objects (func)
208 (setq *interrupt-count* 0)
211 (interrupt-thread c func))
213 (assert (= 100 *interrupt-count*))
214 (terminate-thread c))))
216 (format t "~&interrupt test done~%")
219 (make-thread (lambda ()
221 (sb-ext:gc) (princ "\\") (force-output) )
223 (make-thread (lambda ()
226 (princ "/") (force-output))
229 (when (and a-done b-done) (return))
234 (defun waste (&optional (n 100000))
235 (loop repeat n do (make-string 16384)))
237 (loop for i below 100 do
240 (sb-thread:make-thread
248 (defparameter *aaa* nil)
249 (loop for i below 100 do
252 (sb-thread:make-thread
254 (let ((*aaa* (waste)))
256 (let ((*aaa* (waste)))
260 (format t "~&gc test done~%")
262 ;; this used to deadlock on session-lock
263 (sb-thread:make-thread (lambda () (sb-ext:gc)))
264 ;; expose thread creation races by exiting quickly
265 (sb-thread:make-thread (lambda ()))
267 (defun exercise-syscall (fn reference-errno)
268 (sb-thread:make-thread
272 (let ((errno (sb-unix::get-errno)))
274 (unless (eql errno reference-errno)
275 (format t "Got errno: ~A (~A) instead of ~A~%"
280 (sb-ext:quit :unix-status 1)))))))
282 (let* ((nanosleep-errno (progn
283 (sb-unix:nanosleep -1 0)
284 (sb-unix::get-errno)))
287 :if-does-not-exist nil)
288 (sb-unix::get-errno)))
291 (exercise-syscall (lambda () (sb-unix:nanosleep -1 0)) nanosleep-errno)
292 (exercise-syscall (lambda () (open "no-such-file"
293 :if-does-not-exist nil))
295 (sb-thread:make-thread (lambda () (loop (sb-ext:gc) (sleep 1)))))))
297 (princ "terminating threads")
298 (dolist (thread threads)
299 (sb-thread:terminate-thread thread)))
301 (format t "~&errno test done~%")
304 (let ((thread (sb-thread:make-thread (lambda () (sleep 0.1)))))
305 (sb-thread:interrupt-thread
308 (assert (find-restart 'sb-thread:terminate-thread))))))
312 (format t "~&thread startup sigmask test done~%")
314 #| ;; a cll post from eric marsden
316 | (setq *debugger-hook*
317 | (lambda (condition old-debugger-hook)
318 | (debug:backtrace 10)
319 | (unix:unix-exit 2)))
321 | (mp::start-sigalrm-yield)
322 | (flet ((roomy () (loop (with-output-to-string (*standard-output*) (room)))))
323 | (mp:make-process #'roomy)
324 | (mp:make-process #'roomy)))
327 ;; give the other thread time to die before we leave, otherwise the
328 ;; overall exit status is 0, not 104
331 (sb-ext:quit :unix-status 104)