tests/threads.impure.lisp

   1 ;;;; miscellaneous tests of thread stuff
   2
   3 ;;;; This software is part of the SBCL system. See the README file for
   4 ;;;; more information.
   5 ;;;;
   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
   8 ;;;; from CMU CL.
   9 ;;;
  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.
  13
  14 #-sb-thread (quit :unix-status 104)
  15
  16 (in-package "SB-THREAD") ; this is white-box testing, really
  17
  18 ;;; For one of the interupt-thread tests, we want a foreign function
  19 ;;; that does not make syscalls
  20
  21 (with-open-file (o "threads-foreign.c" :direction :output)
  22   (format o "void loop_forever() { while(1) ; }~%"))
  23 (sb-ext:run-program
  24  "cc"
  25  (or #+linux '("-shared" "-o" "threads-foreign.so" "threads-foreign.c")
  26      (error "Missing shared library compilation options for this platform"))
  27  :search t)
  28 (sb-alien:load-1-foreign "threads-foreign.so")
  29 (sb-alien:define-alien-routine loop-forever sb-alien:void)
  30
  31
  32 ;;; elementary "can we get a lock and release it again"
  33 (let ((l (make-mutex :name "foo"))
  34       (p (current-thread-id)))
  35   (assert (eql (mutex-value l) nil) nil "1")
  36   (assert (eql (mutex-lock l) 0) nil "2")
  37   (sb-thread:get-mutex l)
  38   (assert (eql (mutex-value l) p) nil "3")
  39   (assert (eql (mutex-lock l) 0) nil "4")
  40   (sb-thread:release-mutex l)
  41   (assert (eql (mutex-value l) nil) nil "5")
  42   (assert (eql (mutex-lock l) 0)  nil "6")
  43   (describe l))
  44
  45 (let ((queue (make-waitqueue :name "queue"))
  46       (lock (make-mutex :name "lock")))
  47   (labels ((in-new-thread ()
  48              (with-mutex (lock)
  49                (assert (eql (mutex-value lock) (current-thread-id)))
  50                (format t "~A got mutex~%" (current-thread-id))
  51                ;; now drop it and sleep
  52                (condition-wait queue lock)
  53                ;; after waking we should have the lock again
  54                (assert (eql (mutex-value lock) (current-thread-id))))))
  55     (make-thread #'in-new-thread)
  56     (sleep 2)                           ; give it  a chance to start
  57     ;; check the lock is free while it's asleep
  58     (format t "parent thread ~A~%" (current-thread-id))
  59     (assert (eql (mutex-value lock) nil))
  60     (assert (eql (mutex-lock lock) 0))
  61     (with-mutex (lock)
  62       (condition-notify queue))
  63     (sleep 1)))
  64
  65 (let ((queue (make-waitqueue :name "queue"))
  66       (lock (make-mutex :name "lock")))
  67   (labels ((ours-p (value)
  68              (sb-vm:control-stack-pointer-valid-p
  69               (sb-sys:int-sap (sb-kernel:get-lisp-obj-address value))))
  70            (in-new-thread ()
  71              (with-recursive-lock (lock)
  72                (assert (ours-p (mutex-value lock)))
  73                (format t "~A got mutex~%" (mutex-value lock))
  74                ;; now drop it and sleep
  75                (condition-wait queue lock)
  76                ;; after waking we should have the lock again
  77                (format t "woken, ~A got mutex~%" (mutex-value lock))
  78                (assert (ours-p (mutex-value lock))))))
  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))
  85     (with-recursive-lock (lock)
  86       (condition-notify queue))
  87     (sleep 1)))
  88
  89 (let ((mutex (make-mutex :name "contended")))
  90   (labels ((run ()
  91              (let ((me (current-thread-id)))
  92                (dotimes (i 100)
  93                  (with-mutex (mutex)
  94                    (sleep .1)
  95                    (assert (eql (mutex-value mutex) me)))
  96                  (assert (not (eql (mutex-value mutex) me))))
  97                (format t "done ~A~%" (current-thread-id)))))
  98     (let ((kid1 (make-thread #'run))
  99           (kid2 (make-thread #'run)))
 100       (format t "contention ~A ~A~%" kid1 kid2))))
 101
 102 (defun test-interrupt (function-to-interrupt &optional quit-p)
 103   (let ((child  (make-thread function-to-interrupt)))
 104     ;;(format t "gdb ./src/runtime/sbcl ~A~%attach ~A~%" child child)
 105     (sleep 2)
 106     (format t "interrupting child ~A~%" child)
 107     (interrupt-thread child
 108                       (lambda ()
 109                         (format t "child pid ~A~%" (current-thread-id))
 110                         (when quit-p (sb-ext:quit))))
 111     (sleep 1)
 112     child))
 113
 114 ;;; separate tests for (a) interrupting Lisp code, (b) C code, (c) a syscall,
 115 ;;; (d) waiting on a lock, (e) some code which we hope is likely to be
 116 ;;; in pseudo-atomic
 117
 118 (let ((child (test-interrupt (lambda () (loop)))))  (terminate-thread child))
 119
 120 (test-interrupt #'loop-forever :quit)
 121
 122 (let ((child (test-interrupt (lambda () (loop (sleep 2000))))))
 123   ;; Interrupting a sleep form causes it to return early.  Welcome to Unix.
 124   ;; Just to be sure our LOOP form works, let's check the child is still
 125   ;; there
 126   (assert (zerop (sb-unix:unix-kill child 0)))
 127   (terminate-thread child))
 128
 129 (let ((lock (make-mutex :name "loctite"))
 130       child)
 131   (with-mutex (lock)
 132     (setf child (test-interrupt
 133                  (lambda ()
 134                    (with-mutex (lock)
 135                      (assert (eql (mutex-value lock) (current-thread-id))))
 136                    (assert (not (eql (mutex-value lock) (current-thread-id))))
 137                    (sleep 60))))
 138     ;;hold onto lock for long enough that child can't get it immediately
 139     (sleep 20)
 140     (interrupt-thread child (lambda () (format t "l ~A~%" (mutex-value lock))))
 141     (format t "parent releasing lock~%"))
 142   (terminate-thread child))
 143
 144 (defun alloc-stuff () (copy-list '(1 2 3 4 5)))
 145
 146 (let ((c (test-interrupt (lambda () (loop (alloc-stuff))))))
 147   ;; NB this only works on x86: other ports don't have a symbol for
 148   ;; pseudo-atomic atomicity
 149   (format t "new thread ~A~%" c)
 150   (dotimes (i 100)
 151     (sleep (random 1d0))
 152     (interrupt-thread c
 153                       (lambda ()
 154                         (princ ".") (force-output)
 155                         (assert (zerop SB-KERNEL:*PSEUDO-ATOMIC-ATOMIC*)))))
 156   (terminate-thread c))
 157
 158 (format t "~&interrupt test done~%")
 159
 160 (let (a-done b-done)
 161   (make-thread (lambda ()
 162                  (dotimes (i 100)
 163                    (sb-ext:gc) (princ "\\") (force-output) )
 164                  (setf a-done t)))
 165   (make-thread (lambda ()
 166                  (dotimes (i 25)
 167                    (sb-ext:gc :full t)
 168                    (princ "/") (force-output))
 169                  (setf b-done t)))
 170   (loop
 171    (when (and a-done b-done) (return))
 172    (sleep 1)))
 173 (format t "~&gc test done~%")
 174
 175 #|  ;; a cll post from eric marsden
 176 | (defun crash ()
 177 |   (setq *debugger-hook*
 178 |         (lambda (condition old-debugger-hook)
 179 |           (debug:backtrace 10)
 180 |           (unix:unix-exit 2)))
 181 |   #+live-dangerously
 182 |   (mp::start-sigalrm-yield)
 183 |   (flet ((roomy () (loop (with-output-to-string (*standard-output*) (room)))))
 184 |     (mp:make-process #'roomy)
 185 |     (mp:make-process #'roomy)))
 186 |#
 187
 188 ;; give the other thread time to die before we leave, otherwise the
 189 ;; overall exit status is 0, not 104
 190 (sleep 2)
 191
 192 (sb-ext:quit :unix-status 104)