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 (let ((queue (make-waitqueue :name "queue"))
70 (lock (make-mutex :name "lock")))
71 (labels ((in-new-thread ()
73 (assert (eql (mutex-value lock) (current-thread-id)))
74 (format t "~A got mutex~%" (current-thread-id))
75 ;; now drop it and sleep
76 (condition-wait queue lock)
77 ;; after waking we should have the lock again
78 (assert (eql (mutex-value lock) (current-thread-id))))))
79 (make-thread #'in-new-thread)
80 (sleep 2) ; give it a chance to start
81 ;; check the lock is free while it's asleep
82 (format t "parent thread ~A~%" (current-thread-id))
83 (assert (eql (mutex-value lock) nil))
84 (assert (eql (mutex-lock lock) 0))
86 (condition-notify queue))
89 (let ((queue (make-waitqueue :name "queue"))
90 (lock (make-mutex :name "lock")))
91 (labels ((ours-p (value)
92 (sb-vm:control-stack-pointer-valid-p
93 (sb-sys:int-sap (sb-kernel:get-lisp-obj-address value))))
95 (with-recursive-lock (lock)
96 (assert (ours-p (mutex-value lock)))
97 (format t "~A got mutex~%" (mutex-value lock))
98 ;; now drop it and sleep
99 (condition-wait queue lock)
100 ;; after waking we should have the lock again
101 (format t "woken, ~A got mutex~%" (mutex-value lock))
102 (assert (ours-p (mutex-value lock))))))
103 (make-thread #'in-new-thread)
104 (sleep 2) ; give it a chance to start
105 ;; check the lock is free while it's asleep
106 (format t "parent thread ~A~%" (current-thread-id))
107 (assert (eql (mutex-value lock) nil))
108 (assert (eql (mutex-lock lock) 0))
109 (with-recursive-lock (lock)
110 (condition-notify queue))
113 (let ((mutex (make-mutex :name "contended")))
115 (let ((me (current-thread-id)))
119 (assert (eql (mutex-value mutex) me)))
120 (assert (not (eql (mutex-value mutex) me))))
121 (format t "done ~A~%" (current-thread-id)))))
122 (let ((kid1 (make-thread #'run))
123 (kid2 (make-thread #'run)))
124 (format t "contention ~A ~A~%" kid1 kid2))))
126 (defun test-interrupt (function-to-interrupt &optional quit-p)
127 (let ((child (make-thread function-to-interrupt)))
128 ;;(format t "gdb ./src/runtime/sbcl ~A~%attach ~A~%" child child)
130 (format t "interrupting child ~A~%" child)
131 (interrupt-thread child
133 (format t "child pid ~A~%" (current-thread-id))
134 (when quit-p (sb-ext:quit))))
138 ;;; separate tests for (a) interrupting Lisp code, (b) C code, (c) a syscall,
139 ;;; (d) waiting on a lock, (e) some code which we hope is likely to be
142 (let ((child (test-interrupt (lambda () (loop))))) (terminate-thread child))
144 (test-interrupt #'loop-forever :quit)
146 (let ((child (test-interrupt (lambda () (loop (sleep 2000))))))
147 ;; Interrupting a sleep form causes it to return early. Welcome to Unix.
148 ;; Just to be sure our LOOP form works, let's check the child is still
150 (assert (zerop (sb-unix:unix-kill child 0)))
151 (terminate-thread child))
153 (let ((lock (make-mutex :name "loctite"))
156 (setf child (test-interrupt
159 (assert (eql (mutex-value lock) (current-thread-id))))
160 (assert (not (eql (mutex-value lock) (current-thread-id))))
162 ;;hold onto lock for long enough that child can't get it immediately
164 (interrupt-thread child (lambda () (format t "l ~A~%" (mutex-value lock))))
165 (format t "parent releasing lock~%"))
166 (terminate-thread child))
168 (defun alloc-stuff () (copy-list '(1 2 3 4 5)))
170 (let ((c (test-interrupt (lambda () (loop (alloc-stuff))))))
171 ;; NB this only works on x86: other ports don't have a symbol for
172 ;; pseudo-atomic atomicity
173 (format t "new thread ~A~%" c)
178 (princ ".") (force-output)
179 (assert (zerop SB-KERNEL:*PSEUDO-ATOMIC-ATOMIC*)))))
180 (terminate-thread c))
182 (format t "~&interrupt test done~%")
185 (make-thread (lambda ()
187 (sb-ext:gc) (princ "\\") (force-output) )
189 (make-thread (lambda ()
192 (princ "/") (force-output))
195 (when (and a-done b-done) (return))
197 (format t "~&gc test done~%")
199 #| ;; a cll post from eric marsden
201 | (setq *debugger-hook*
202 | (lambda (condition old-debugger-hook)
203 | (debug:backtrace 10)
204 | (unix:unix-exit 2)))
206 | (mp::start-sigalrm-yield)
207 | (flet ((roomy () (loop (with-output-to-string (*standard-output*) (room)))))
208 | (mp:make-process #'roomy)
209 | (mp:make-process #'roomy)))
212 ;; give the other thread time to die before we leave, otherwise the
213 ;; overall exit status is 0, not 104
216 (sb-ext:quit :unix-status 104)