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 (in-package "SB-THREAD") ; this is white-box testing, really
  15
  16 (use-package :test-util)
  17
  18 (defun wait-for-threads (threads)
  19   (loop while (some #'sb-thread:thread-alive-p threads) do (sleep 0.01)))
  20
  21 (assert (eql 1 (length (list-all-threads))))
  22
  23 (assert (eq *current-thread*
  24             (find (thread-name *current-thread*) (list-all-threads)
  25                   :key #'thread-name :test #'equal)))
  26
  27 (assert (thread-alive-p *current-thread*))
  28
  29 (let ((a 0))
  30   (interrupt-thread *current-thread* (lambda () (setq a 1)))
  31   (assert (eql a 1)))
  32
  33 (let ((spinlock (make-spinlock)))
  34   (with-spinlock (spinlock)))
  35
  36 (let ((mutex (make-mutex)))
  37   (with-mutex (mutex)
  38     mutex))
  39
  40 #-sb-thread (sb-ext:quit :unix-status 104)
  41
  42 (let ((old-threads (list-all-threads))
  43       (thread (make-thread (lambda ()
  44                              (assert (find *current-thread* *all-threads*))
  45                              (sleep 2))))
  46       (new-threads (list-all-threads)))
  47   (assert (thread-alive-p thread))
  48   (assert (eq thread (first new-threads)))
  49   (assert (= (1+ (length old-threads)) (length new-threads)))
  50   (sleep 3)
  51   (assert (not (thread-alive-p thread))))
  52
  53 ;;; We had appalling scaling properties for a while.  Make sure they
  54 ;;; don't reappear.
  55 (defun scaling-test (function &optional (nthreads 5))
  56   "Execute FUNCTION with NTHREADS lurking to slow it down."
  57   (let ((queue (sb-thread:make-waitqueue))
  58         (mutex (sb-thread:make-mutex)))
  59     ;; Start NTHREADS idle threads.
  60     (dotimes (i nthreads)
  61       (sb-thread:make-thread (lambda ()
  62                                (with-mutex (mutex)
  63                                  (sb-thread:condition-wait queue mutex))
  64                                (sb-ext:quit))))
  65     (let ((start-time (get-internal-run-time)))
  66       (funcall function)
  67       (prog1 (- (get-internal-run-time) start-time)
  68         (sb-thread:condition-broadcast queue)))))
  69 (defun fact (n)
  70   "A function that does work with the CPU."
  71   (if (zerop n) 1 (* n (fact (1- n)))))
  72 (let ((work (lambda () (fact 15000))))
  73   (let ((zero (scaling-test work 0))
  74         (four (scaling-test work 4)))
  75     ;; a slightly weak assertion, but good enough for starters.
  76     (assert (< four (* 1.5 zero)))))
  77
  78 ;;; For one of the interupt-thread tests, we want a foreign function
  79 ;;; that does not make syscalls
  80
  81 (with-open-file (o "threads-foreign.c" :direction :output :if-exists :supersede)
  82   (format o "void loop_forever() { while(1) ; }~%"))
  83 (sb-ext:run-program
  84  #-sunos "cc" #+sunos "gcc"
  85  (or #+(or linux freebsd sunos) '(#+x86-64 "-fPIC"
  86                                   "-shared" "-o" "threads-foreign.so" "threads-foreign.c")
  87      #+darwin '("-dynamiclib" "-o" "threads-foreign.so" "threads-foreign.c")
  88      (error "Missing shared library compilation options for this platform"))
  89  :search t)
  90 (sb-alien:load-shared-object "threads-foreign.so")
  91 (sb-alien:define-alien-routine loop-forever sb-alien:void)
  92
  93
  94 ;;; elementary "can we get a lock and release it again"
  95 (let ((l (make-mutex :name "foo"))
  96       (p *current-thread*))
  97   (assert (eql (mutex-value l) nil) nil "1")
  98   (sb-thread:get-mutex l)
  99   (assert (eql (mutex-value l) p) nil "3")
 100   (sb-thread:release-mutex l)
 101   (assert (eql (mutex-value l) nil) nil "5"))
 102
 103 (labels ((ours-p (value)
 104            (eq *current-thread* value)))
 105   (let ((l (make-mutex :name "rec")))
 106     (assert (eql (mutex-value l) nil) nil "1")
 107     (sb-thread:with-recursive-lock (l)
 108       (assert (ours-p (mutex-value l)) nil "3")
 109       (sb-thread:with-recursive-lock (l)
 110         (assert (ours-p (mutex-value l)) nil "4"))
 111       (assert (ours-p (mutex-value l)) nil "5"))
 112     (assert (eql (mutex-value l) nil) nil "6")))
 113
 114 (with-test (:name (:mutex :nesting-mutex-and-recursive-lock))
 115   (let ((l (make-mutex :name "a mutex")))
 116     (with-mutex (l)
 117       (with-recursive-lock (l)))))
 118
 119 (let ((l (make-spinlock :name "spinlock")))
 120   (assert (eql (spinlock-value l) 0) nil "1")
 121   (with-spinlock (l)
 122     (assert (eql (spinlock-value l) 1) nil "2"))
 123   (assert (eql (spinlock-value l) 0) nil "3"))
 124
 125 ;; test that SLEEP actually sleeps for at least the given time, even
 126 ;; if interrupted by another thread exiting/a gc/anything
 127 (let ((start-time (get-universal-time)))
 128   (make-thread (lambda () (sleep 1) (sb-ext:gc :full t)))
 129   (sleep 5)
 130   (assert (>= (get-universal-time) (+ 5 start-time))))
 131
 132
 133 (let ((queue (make-waitqueue :name "queue"))
 134       (lock (make-mutex :name "lock"))
 135       (n 0))
 136   (labels ((in-new-thread ()
 137              (with-mutex (lock)
 138                (assert (eql (mutex-value lock) *current-thread*))
 139                (format t "~A got mutex~%" *current-thread*)
 140                ;; now drop it and sleep
 141                (condition-wait queue lock)
 142                ;; after waking we should have the lock again
 143                (assert (eql (mutex-value lock) *current-thread*))
 144                (assert (eql n 1))
 145                (decf n))))
 146     (make-thread #'in-new-thread)
 147     (sleep 2)                           ; give it  a chance to start
 148     ;; check the lock is free while it's asleep
 149     (format t "parent thread ~A~%" *current-thread*)
 150     (assert (eql (mutex-value lock) nil))
 151     (with-mutex (lock)
 152       (incf n)
 153       (condition-notify queue))
 154     (sleep 1)))
 155
 156 (let ((queue (make-waitqueue :name "queue"))
 157       (lock (make-mutex :name "lock")))
 158   (labels ((ours-p (value)
 159              (eq *current-thread* value))
 160            (in-new-thread ()
 161              (with-recursive-lock (lock)
 162                (assert (ours-p (mutex-value lock)))
 163                (format t "~A got mutex~%" (mutex-value lock))
 164                ;; now drop it and sleep
 165                (condition-wait queue lock)
 166                ;; after waking we should have the lock again
 167                (format t "woken, ~A got mutex~%" (mutex-value lock))
 168                (assert (ours-p (mutex-value lock))))))
 169     (make-thread #'in-new-thread)
 170     (sleep 2)                           ; give it  a chance to start
 171     ;; check the lock is free while it's asleep
 172     (format t "parent thread ~A~%" *current-thread*)
 173     (assert (eql (mutex-value lock) nil))
 174     (with-recursive-lock (lock)
 175       (condition-notify queue))
 176     (sleep 1)))
 177
 178 (let ((mutex (make-mutex :name "contended")))
 179   (labels ((run ()
 180              (let ((me *current-thread*))
 181                (dotimes (i 100)
 182                  (with-mutex (mutex)
 183                    (sleep .03)
 184                    (assert (eql (mutex-value mutex) me)))
 185                  (assert (not (eql (mutex-value mutex) me))))
 186                (format t "done ~A~%" *current-thread*))))
 187     (let ((kid1 (make-thread #'run))
 188           (kid2 (make-thread #'run)))
 189       (format t "contention ~A ~A~%" kid1 kid2)
 190       (wait-for-threads (list kid1 kid2)))))
 191
 192 ;;; semaphores
 193
 194 (defmacro raises-timeout-p (&body body)
 195   `(handler-case (progn (progn ,@body) nil)
 196     (sb-ext:timeout () t)))
 197
 198 (with-test (:name (:semaphore :wait-forever))
 199   (let ((sem (make-semaphore :count 0)))
 200     (assert (raises-timeout-p
 201               (sb-ext:with-timeout 0.1
 202                 (wait-on-semaphore sem))))))
 203
 204 (with-test (:name (:semaphore :initial-count))
 205   (let ((sem (make-semaphore :count 1)))
 206     (sb-ext:with-timeout 0.1
 207       (wait-on-semaphore sem))))
 208
 209 (with-test (:name (:semaphore :wait-then-signal))
 210   (let ((sem (make-semaphore))
 211         (signalled-p nil))
 212     (make-thread (lambda ()
 213                    (sleep 0.1)
 214                    (setq signalled-p t)
 215                    (signal-semaphore sem)))
 216     (wait-on-semaphore sem)
 217     (assert signalled-p)))
 218
 219 (with-test (:name (:semaphore :signal-then-wait))
 220   (let ((sem (make-semaphore))
 221         (signalled-p nil))
 222     (make-thread (lambda ()
 223                    (signal-semaphore sem)
 224                    (setq signalled-p t)))
 225     (loop until signalled-p)
 226     (wait-on-semaphore sem)
 227     (assert signalled-p)))
 228
 229 (with-test (:name (:semaphore :multiple-signals))
 230   (let* ((sem (make-semaphore :count 5))
 231          (threads (loop repeat 20
 232                         collect (make-thread (lambda ()
 233                                                (wait-on-semaphore sem))))))
 234     (flet ((count-live-threads ()
 235              (count-if #'thread-alive-p threads)))
 236       (sleep 0.5)
 237       (assert (= 15 (count-live-threads)))
 238       (signal-semaphore sem 10)
 239       (sleep 0.5)
 240       (assert (= 5 (count-live-threads)))
 241       (signal-semaphore sem 3)
 242       (sleep 0.5)
 243       (assert (= 2 (count-live-threads)))
 244       (signal-semaphore sem 4)
 245       (sleep 0.5)
 246       (assert (= 0 (count-live-threads))))))
 247
 248 (format t "~&semaphore tests done~%")
 249
 250 (defun test-interrupt (function-to-interrupt &optional quit-p)
 251   (let ((child  (make-thread function-to-interrupt)))
 252     ;;(format t "gdb ./src/runtime/sbcl ~A~%attach ~A~%" child child)
 253     (sleep 2)
 254     (format t "interrupting child ~A~%" child)
 255     (interrupt-thread child
 256                       (lambda ()
 257                         (format t "child pid ~A~%" *current-thread*)
 258                         (when quit-p (sb-ext:quit))))
 259     (sleep 1)
 260     child))
 261
 262 ;; separate tests for (a) interrupting Lisp code, (b) C code, (c) a syscall,
 263 ;; (d) waiting on a lock, (e) some code which we hope is likely to be
 264 ;; in pseudo-atomic
 265
 266 (let ((child (test-interrupt (lambda () (loop)))))  (terminate-thread child))
 267
 268 (test-interrupt #'loop-forever :quit)
 269
 270 (let ((child (test-interrupt (lambda () (loop (sleep 2000))))))
 271   (terminate-thread child)
 272   (wait-for-threads (list child)))
 273
 274 (let ((lock (make-mutex :name "loctite"))
 275       child)
 276   (with-mutex (lock)
 277     (setf child (test-interrupt
 278                  (lambda ()
 279                    (with-mutex (lock)
 280                      (assert (eql (mutex-value lock) *current-thread*)))
 281                    (assert (not (eql (mutex-value lock) *current-thread*)))
 282                    (sleep 10))))
 283     ;;hold onto lock for long enough that child can't get it immediately
 284     (sleep 5)
 285     (interrupt-thread child (lambda () (format t "l ~A~%" (mutex-value lock))))
 286     (format t "parent releasing lock~%"))
 287   (terminate-thread child)
 288   (wait-for-threads (list child)))
 289
 290 (format t "~&locking test done~%")
 291
 292 (defun alloc-stuff () (copy-list '(1 2 3 4 5)))
 293
 294 (progn
 295   (let ((thread (sb-thread:make-thread (lambda () (loop (alloc-stuff))))))
 296     (let ((killers
 297            (loop repeat 4 collect
 298                  (sb-thread:make-thread
 299                   (lambda ()
 300                     (loop repeat 25 do
 301                           (sleep (random 0.1d0))
 302                           (princ ".")
 303                           (force-output)
 304                           (sb-thread:interrupt-thread thread (lambda ()))))))))
 305       (wait-for-threads killers)
 306       (sb-thread:terminate-thread thread)
 307       (wait-for-threads (list thread))))
 308   (sb-ext:gc :full t))
 309
 310 (format t "~&multi interrupt test done~%")
 311
 312 (let ((c (make-thread (lambda () (loop (alloc-stuff))))))
 313   ;; NB this only works on x86: other ports don't have a symbol for
 314   ;; pseudo-atomic atomicity
 315   (dotimes (i 100)
 316     (sleep (random 0.1d0))
 317     (interrupt-thread c
 318                       (lambda ()
 319                         (princ ".") (force-output)
 320                         (assert (thread-alive-p *current-thread*))
 321                         (assert
 322                          (not (logbitp 0 SB-KERNEL:*PSEUDO-ATOMIC-BITS*))))))
 323   (terminate-thread c)
 324   (wait-for-threads (list c)))
 325
 326 (format t "~&interrupt test done~%")
 327
 328 (defparameter *interrupt-count* 0)
 329
 330 (declaim (notinline check-interrupt-count))
 331 (defun check-interrupt-count (i)
 332   (declare (optimize (debug 1) (speed 1)))
 333   ;; This used to lose if eflags were not restored after an interrupt.
 334   (unless (typep i 'fixnum)
 335     (error "!!!!!!!!!!!")))
 336
 337 (let ((c (make-thread
 338           (lambda ()
 339             (handler-bind ((error #'(lambda (cond)
 340                                       (princ cond)
 341                                       (sb-debug:backtrace
 342                                        most-positive-fixnum))))
 343               (loop (check-interrupt-count *interrupt-count*)))))))
 344   (let ((func (lambda ()
 345                 (princ ".")
 346                 (force-output)
 347                 (sb-impl::atomic-incf/symbol *interrupt-count*))))
 348     (setq *interrupt-count* 0)
 349     (dotimes (i 100)
 350       (sleep (random 0.1d0))
 351       (interrupt-thread c func))
 352     (loop until (= *interrupt-count* 100) do (sleep 0.1))
 353     (terminate-thread c)
 354     (wait-for-threads (list c))))
 355
 356 (format t "~&interrupt count test done~%")
 357
 358 (let (a-done b-done)
 359   (make-thread (lambda ()
 360                  (dotimes (i 100)
 361                    (sb-ext:gc) (princ "\\") (force-output))
 362                  (setf a-done t)))
 363   (make-thread (lambda ()
 364                  (dotimes (i 25)
 365                    (sb-ext:gc :full t)
 366                    (princ "/") (force-output))
 367                  (setf b-done t)))
 368   (loop
 369    (when (and a-done b-done) (return))
 370    (sleep 1)))
 371
 372 (terpri)
 373
 374 (defun waste (&optional (n 100000))
 375   (loop repeat n do (make-string 16384)))
 376
 377 (loop for i below 100 do
 378       (princ "!")
 379       (force-output)
 380       (sb-thread:make-thread
 381        #'(lambda ()
 382            (waste)))
 383       (waste)
 384       (sb-ext:gc))
 385
 386 (terpri)
 387
 388 (defparameter *aaa* nil)
 389 (loop for i below 100 do
 390       (princ "!")
 391       (force-output)
 392       (sb-thread:make-thread
 393        #'(lambda ()
 394            (let ((*aaa* (waste)))
 395              (waste))))
 396       (let ((*aaa* (waste)))
 397         (waste))
 398       (sb-ext:gc))
 399
 400 (format t "~&gc test done~%")
 401
 402 ;; this used to deadlock on session-lock
 403 (sb-thread:make-thread (lambda () (sb-ext:gc)))
 404 ;; expose thread creation races by exiting quickly
 405 (sb-thread:make-thread (lambda ()))
 406
 407 (defun exercise-syscall (fn reference-errno)
 408   (sb-thread:make-thread
 409    (lambda ()
 410      (loop do
 411           (funcall fn)
 412           (let ((errno (sb-unix::get-errno)))
 413             (sleep (random 0.1d0))
 414             (unless (eql errno reference-errno)
 415               (format t "Got errno: ~A (~A) instead of ~A~%"
 416                       errno
 417                       (sb-unix::strerror)
 418                       reference-errno)
 419               (force-output)
 420               (sb-ext:quit :unix-status 1)))))))
 421
 422 ;; (nanosleep -1 0) does not fail on FreeBSD
 423 (let* (#-freebsd
 424        (nanosleep-errno (progn
 425                           (sb-unix:nanosleep -1 0)
 426                           (sb-unix::get-errno)))
 427        (open-errno (progn
 428                      (open "no-such-file"
 429                            :if-does-not-exist nil)
 430                      (sb-unix::get-errno)))
 431        (threads
 432         (list
 433          #-freebsd
 434          (exercise-syscall (lambda () (sb-unix:nanosleep -1 0)) nanosleep-errno)
 435          (exercise-syscall (lambda () (open "no-such-file"
 436                                             :if-does-not-exist nil))
 437                            open-errno)
 438          (sb-thread:make-thread (lambda () (loop (sb-ext:gc) (sleep 1)))))))
 439   (sleep 10)
 440   (princ "terminating threads")
 441   (dolist (thread threads)
 442     (sb-thread:terminate-thread thread)))
 443
 444 (format t "~&errno test done~%")
 445
 446 (loop repeat 100 do
 447       (let ((thread (sb-thread:make-thread (lambda () (sleep 0.1)))))
 448         (sb-thread:interrupt-thread
 449          thread
 450          (lambda ()
 451            (assert (find-restart 'sb-thread:terminate-thread))))))
 452
 453 (sb-ext:gc :full t)
 454
 455 (format t "~&thread startup sigmask test done~%")
 456
 457 (sb-debug::enable-debugger)
 458 (let* ((main-thread *current-thread*)
 459        (interruptor-thread
 460         (make-thread (lambda ()
 461                        (sleep 2)
 462                        (interrupt-thread main-thread #'break)
 463                        (sleep 2)
 464                        (interrupt-thread main-thread #'continue)))))
 465   (with-session-lock (*session*)
 466     (sleep 3))
 467   (loop while (thread-alive-p interruptor-thread)))
 468
 469 (format t "~&session lock test done~%")
 470
 471 (loop repeat 20 do
 472       (wait-for-threads
 473        (loop for i below 100 collect
 474              (sb-thread:make-thread (lambda ())))))
 475
 476 (format t "~&creation test done~%")
 477
 478 ;; interrupt handlers are per-thread with pthreads, make sure the
 479 ;; handler installed in one thread is global
 480 (sb-thread:make-thread
 481  (lambda ()
 482    (sb-ext:run-program "sleep" '("1") :search t :wait nil)))
 483
 484 ;;;; Binding stack safety
 485
 486 (defparameter *x* nil)
 487 (defparameter *n-gcs-requested* 0)
 488 (defparameter *n-gcs-done* 0)
 489
 490 (let ((counter 0))
 491   (defun make-something-big ()
 492     (let ((x (make-string 32000)))
 493       (incf counter)
 494       (let ((counter counter))
 495         (sb-ext:finalize x (lambda () (format t " ~S" counter)
 496                                    (force-output)))))))
 497
 498 (defmacro wait-for-gc ()
 499   `(progn
 500      (incf *n-gcs-requested*)
 501      (loop while (< *n-gcs-done* *n-gcs-requested*))))
 502
 503 (defun send-gc ()
 504   (loop until (< *n-gcs-done* *n-gcs-requested*))
 505   (format t "G")
 506   (force-output)
 507   (sb-ext:gc)
 508   (incf *n-gcs-done*))
 509
 510 (defun exercise-binding ()
 511   (loop
 512    (let ((*x* (make-something-big)))
 513      (let ((*x* 42))
 514        ;; at this point the binding stack looks like this:
 515        ;; NO-TLS-VALUE-MARKER, *x*, SOMETHING, *x*
 516        t))
 517    (wait-for-gc)
 518    ;; sig_stop_for_gc_handler binds FREE_INTERRUPT_CONTEXT_INDEX. By
 519    ;; now SOMETHING is gc'ed and the binding stack looks like this: 0,
 520    ;; 0, SOMETHING, 0 (because the symbol slots are zeroed on
 521    ;; unbinding but values are not).
 522    (let ((*x* nil))
 523      ;; bump bsp as if a BIND had just started
 524      (incf sb-vm::*binding-stack-pointer* 2)
 525      (wait-for-gc)
 526      (decf sb-vm::*binding-stack-pointer* 2))))
 527
 528 (with-test (:name (:binding-stack-gc-safety))
 529   (let (threads)
 530     (unwind-protect
 531          (progn
 532            (push (sb-thread:make-thread #'exercise-binding) threads)
 533            (push (sb-thread:make-thread (lambda ()
 534                                           (loop
 535                                            (sleep 0.1)
 536                                            (send-gc))))
 537                  threads)
 538            (sleep 4))
 539       (mapc #'sb-thread:terminate-thread threads))))
 540
 541 (format t "~&binding test done~%")
 542
 543 ;; Try to corrupt the NEXT-VECTOR. Operations on a hash table with a
 544 ;; cyclic NEXT-VECTOR can loop endlessly in a WITHOUT-GCING form
 545 ;; causing the next gc hang SBCL.
 546 (with-test (:name (:hash-table-thread-safety))
 547   (let* ((hash (make-hash-table))
 548          (threads (list (sb-thread:make-thread
 549                          (lambda ()
 550                            (loop
 551                             ;;(princ "1") (force-output)
 552                             (setf (gethash (random 100) hash) 'h))))
 553                         (sb-thread:make-thread
 554                          (lambda ()
 555                            (loop
 556                             ;;(princ "2") (force-output)
 557                             (remhash (random 100) hash))))
 558                         (sb-thread:make-thread
 559                          (lambda ()
 560                            (loop
 561                             (sleep (random 1.0))
 562                             (sb-ext:gc :full t)))))))
 563     (unwind-protect
 564          (sleep 5)
 565       (mapc #'sb-thread:terminate-thread threads))))
 566
 567 (format t "~&hash table test done~%")
 568 #|  ;; a cll post from eric marsden
 569 | (defun crash ()
 570 |   (setq *debugger-hook*
 571 |         (lambda (condition old-debugger-hook)
 572 |           (debug:backtrace 10)
 573 |           (unix:unix-exit 2)))
 574 |   #+live-dangerously
 575 |   (mp::start-sigalrm-yield)
 576 |   (flet ((roomy () (loop (with-output-to-string (*standard-output*) (room)))))
 577 |     (mp:make-process #'roomy)
 578 |     (mp:make-process #'roomy)))
 579 |#
 580
 581 (with-test (:name (:condition-variable :notify-multiple))
 582   (flet ((tester (notify-fun)
 583            (let ((queue (make-waitqueue :name "queue"))
 584                  (lock (make-mutex :name "lock"))
 585                  (data nil))
 586              (labels ((test (x)
 587                         (loop
 588                            (with-mutex (lock)
 589                              (format t "condition-wait ~a~%" x)
 590                              (force-output)
 591                              (condition-wait queue lock)
 592                              (format t "woke up ~a~%" x)
 593                              (force-output)
 594                              (push x data)))))
 595                (let ((threads (loop for x from 1 to 10
 596                                     collect
 597                                     (let ((x x))
 598                                       (sb-thread:make-thread (lambda ()
 599                                                                (test x)))))))
 600                  (sleep 5)
 601                  (with-mutex (lock)
 602                    (funcall notify-fun queue))
 603                  (sleep 5)
 604                  (mapcar #'terminate-thread threads)
 605                  ;; Check that all threads woke up at least once
 606                  (assert (= (length (remove-duplicates data)) 10)))))))
 607     (tester (lambda (queue)
 608               (format t "~&(condition-notify queue 10)~%")
 609               (force-output)
 610               (condition-notify queue 10)))
 611     (tester (lambda (queue)
 612               (format t "~&(condition-broadcast queue)~%")
 613               (force-output)
 614               (condition-broadcast queue)))))
 615
 616 (format t "waitqueue wakeup tests done~%")
 617
 618 (with-test (:name (:mutex :finalization))
 619   (let ((a nil))
 620     (dotimes (i 500000)
 621       (setf a (make-mutex)))))
 622
 623 (format t "mutex finalization test done~%")
 624
 625 ;;; Check that INFO is thread-safe, at least when we're just doing reads.
 626
 627 (let* ((symbols (loop repeat 10000 collect (gensym)))
 628        (functions (loop for (symbol . rest) on symbols
 629                         for next = (car rest)
 630                         for fun = (let ((next next))
 631                                     (lambda (n)
 632                                       (if next
 633                                           (funcall next (1- n))
 634                                           n)))
 635                         do (setf (symbol-function symbol) fun)
 636                         collect fun)))
 637   (defun infodb-test ()
 638     (funcall (car functions) 9999)))
 639
 640 (with-test (:name (:infodb :read))
 641   (let* ((ok t)
 642          (threads (loop for i from 0 to 10
 643                         collect (sb-thread:make-thread
 644                                  (let ((i i))
 645                                    (lambda ()
 646                                      (dotimes (j 100)
 647                                        (write-char #\-)
 648                                        (finish-output)
 649                                        (let ((n (infodb-test)))
 650                                          (unless (zerop n)
 651                                            (setf ok nil)
 652                                            (format t "N != 0 (~A)~%" n)
 653                                            (quit))))))))))
 654     (wait-for-threads threads)
 655     (assert ok)))
 656
 657 (format t "infodb test done~%")
 658
 659 (with-test (:name (:backtrace))
 660   ;; Printing backtraces from several threads at once used to hang the
 661   ;; whole SBCL process (discovered by accident due to a timer.impure
 662   ;; test misbehaving). The cause was that packages weren't even
 663   ;; thread-safe for only doing FIND-SYMBOL, and while printing
 664   ;; backtraces a loot of symbol lookups need to be done due to
 665   ;; *PRINT-ESCAPE*.
 666   (let* ((threads (loop repeat 10
 667                         collect (sb-thread:make-thread
 668                                  (lambda ()
 669                                    (dotimes (i 1000)
 670                                      (with-output-to-string (*debug-io*)
 671                                        (sb-debug::backtrace 10))))))))
 672     (wait-for-threads threads)))
 673
 674 (format t "backtrace test done~%")
 675
 676 (format t "~&starting gc deadlock test: WARNING: THIS TEST WILL HANG ON FAILURE!~%")
 677
 678 (with-test (:name (:gc-deadlock))
 679   ;; Prior to 0.9.16.46 thread exit potentially deadlocked the
 680   ;; GC due to *all-threads-lock* and session lock. On earlier
 681   ;; versions and at least on one specific box this test is good enough
 682   ;; to catch that typically well before the 1500th iteration.
 683   (loop
 684      with i = 0
 685      with n = 3000
 686      while (< i n)
 687      do
 688        (incf i)
 689        (when (zerop (mod i 100))
 690          (write-char #\.)
 691          (force-output))
 692        (handler-case
 693            (if (oddp i)
 694                (sb-thread:make-thread
 695                 (lambda ()
 696                   (sleep (random 0.001)))
 697                 :name (list :sleep i))
 698                (sb-thread:make-thread
 699                 (lambda ()
 700                   ;; KLUDGE: what we are doing here is explicit,
 701                   ;; but the same can happen because of a regular
 702                   ;; MAKE-THREAD or LIST-ALL-THREADS, and various
 703                   ;; session functions.
 704                   (sb-thread:with-mutex (sb-thread::*all-threads-lock*)
 705                     (sb-thread::with-session-lock (sb-thread::*session*)
 706                       (sb-ext:gc))))
 707                 :name (list :gc i)))
 708          (error (e)
 709            (format t "~%error creating thread ~D: ~A -- backing off for retry~%" i e)
 710            (sleep 0.1)
 711            (incf i)))))
 712
 713 (format t "~&gc deadlock test done~%")
 714 \f
 715 (let ((count (make-array 8 :initial-element 0)))
 716   (defun closure-one ()
 717     (declare (optimize safety))
 718     (values (incf (aref count 0)) (incf (aref count 1))
 719             (incf (aref count 2)) (incf (aref count 3))
 720             (incf (aref count 4)) (incf (aref count 5))
 721             (incf (aref count 6)) (incf (aref count 7))))
 722   (defun no-optimizing-away-closure-one ()
 723     (setf count (make-array 8 :initial-element 0))))
 724
 725 (defstruct box
 726   (count 0))
 727
 728 (let ((one (make-box))
 729       (two (make-box))
 730       (three (make-box)))
 731   (defun closure-two ()
 732     (declare (optimize safety))
 733     (values (incf (box-count one)) (incf (box-count two)) (incf (box-count three))))
 734   (defun no-optimizing-away-closure-two ()
 735     (setf one (make-box)
 736           two (make-box)
 737           three (make-box))))
 738
 739 (with-test (:name (:funcallable-instances))
 740   ;; the funcallable-instance implementation used not to be threadsafe
 741   ;; against setting the funcallable-instance function to a closure
 742   ;; (because the code and lexenv were set separately).
 743   (let ((fun (sb-kernel:%make-funcallable-instance 0))
 744         (condition nil))
 745     (setf (sb-kernel:funcallable-instance-fun fun) #'closure-one)
 746     (flet ((changer ()
 747              (loop (setf (sb-kernel:funcallable-instance-fun fun) #'closure-one)
 748                    (setf (sb-kernel:funcallable-instance-fun fun) #'closure-two)))
 749            (test ()
 750              (handler-case (loop (funcall fun))
 751                (serious-condition (c) (setf condition c)))))
 752       (let ((changer (make-thread #'changer))
 753             (test (make-thread #'test)))
 754         (handler-case
 755             (progn
 756               ;; The two closures above are fairly carefully crafted
 757               ;; so that if given the wrong lexenv they will tend to
 758               ;; do some serious damage, but it is of course difficult
 759               ;; to predict where the various bits and pieces will be
 760               ;; allocated.  Five seconds failed fairly reliably on
 761               ;; both my x86 and x86-64 systems.  -- CSR, 2006-09-27.
 762               (sb-ext:with-timeout 5
 763                 (wait-for-threads (list test)))
 764               (error "~@<test thread got condition:~2I~_~A~@:>" condition))
 765           (sb-ext:timeout ()
 766             (terminate-thread changer)
 767             (terminate-thread test)
 768             (wait-for-threads (list changer test))))))))
 769
 770 (format t "~&funcallable-instance test done~%")
 771
 772 (defun random-type (n)
 773   `(integer ,(random n) ,(+ n (random n))))
 774
 775 (defun subtypep-hash-cache-test ()
 776   (dotimes (i 10000)
 777     (let ((type1 (random-type 500))
 778           (type2 (random-type 500)))
 779       (let ((a (subtypep type1 type2)))
 780         (dotimes (i 100)
 781           (assert (eq (subtypep type1 type2) a))))))
 782   (format t "ok~%")
 783   (force-output))
 784
 785 (with-test (:name '(:hash-cache :subtypep))
 786   (dotimes (i 10)
 787     (sb-thread:make-thread #'subtypep-hash-cache-test)))
 788
 789 (format t "hash-cache tests done~%")