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 ; WHITE-BOX TESTS
  15
  16 (in-package "SB-THREAD")
  17 (use-package :test-util)
  18 (use-package "ASSERTOID")
  19
  20 (setf sb-unix::*on-dangerous-wait* :error)
  21
  22 (defun wait-for-threads (threads)
  23   (mapc (lambda (thread) (sb-thread:join-thread thread :default nil)) threads)
  24   (assert (not (some #'sb-thread:thread-alive-p threads))))
  25
  26 (with-test (:name (:threads :trivia))
  27   (assert (eql 1 (length (list-all-threads))))
  28
  29   (assert (eq *current-thread*
  30               (find (thread-name *current-thread*) (list-all-threads)
  31                     :key #'thread-name :test #'equal)))
  32
  33   (assert (thread-alive-p *current-thread*)))
  34
  35 (with-test (:name (:with-mutex :basics))
  36   (let ((mutex (make-mutex)))
  37     (with-mutex (mutex)
  38       mutex)))
  39
  40 (sb-alien:define-alien-routine "check_deferrables_blocked_or_lose"
  41     void
  42   (where sb-alien:unsigned-long))
  43 (sb-alien:define-alien-routine "check_deferrables_unblocked_or_lose"
  44     void
  45   (where sb-alien:unsigned-long))
  46
  47 (with-test (:name (:interrupt-thread :basics :no-unwinding))
  48   (let ((a 0))
  49     (interrupt-thread *current-thread* (lambda () (setq a 1)))
  50     (assert (eql a 1))))
  51
  52 (with-test (:name (:interrupt-thread :deferrables-blocked))
  53   (sb-thread:interrupt-thread sb-thread:*current-thread*
  54                               (lambda ()
  55                                 (check-deferrables-blocked-or-lose 0))))
  56
  57 (with-test (:name (:interrupt-thread :deferrables-unblocked))
  58   (sb-thread:interrupt-thread sb-thread:*current-thread*
  59                               (lambda ()
  60                                 (with-interrupts
  61                                   (check-deferrables-unblocked-or-lose 0)))))
  62
  63 (with-test (:name (:interrupt-thread :nlx))
  64   (catch 'xxx
  65     (sb-thread:interrupt-thread sb-thread:*current-thread*
  66                                 (lambda ()
  67                                   (check-deferrables-blocked-or-lose 0)
  68                                   (throw 'xxx nil))))
  69   (check-deferrables-unblocked-or-lose 0))
  70
  71 #-sb-thread (sb-ext:exit :code 104)
  72
  73 ;;;; Now the real tests...
  74
  75 (with-test (:name (:with-mutex :timeout))
  76   (let ((m (make-mutex)))
  77     (with-mutex (m)
  78       (assert (null (join-thread (make-thread
  79                                   (lambda ()
  80                                     (with-mutex (m :timeout 0.1)
  81                                       t)))))))
  82     (assert (join-thread (make-thread
  83                           (lambda ()
  84                             (with-mutex (m :timeout 0.1)
  85                               t)))))))
  86
  87 (with-test (:name (:interrupt-thread :deferrables-unblocked-by-lock))
  88   (let ((lock (sb-thread::make-mutex))
  89         (thread (make-join-thread (lambda ()
  90                                     (loop (sleep 1))))))
  91     (sb-thread::grab-mutex lock)
  92     (sb-thread:interrupt-thread thread
  93                                 (lambda ()
  94                                   (check-deferrables-blocked-or-lose 0)
  95                                   (sb-thread::grab-mutex lock)
  96                                   (check-deferrables-unblocked-or-lose 0)
  97                                   (sb-thread:abort-thread)))
  98     (sleep 3)
  99     (sb-thread::release-mutex lock)))
 100
 101 ;;; compare-and-swap
 102
 103 (defmacro defincf (name accessor &rest args)
 104   `(defun ,name (x)
 105      (let* ((old (,accessor x ,@args))
 106          (new (1+ old)))
 107     (loop until (eq old (sb-ext:compare-and-swap (,accessor x ,@args) old new))
 108        do (setf old (,accessor x ,@args)
 109                 new (1+ old)))
 110     new)))
 111
 112 (defstruct cas-struct (slot 0))
 113
 114 (defincf incf-car car)
 115 (defincf incf-cdr cdr)
 116 (defincf incf-slot cas-struct-slot)
 117 (defincf incf-symbol-value symbol-value)
 118 (defincf incf-svref/1 svref 1)
 119 (defincf incf-svref/0 svref 0)
 120
 121 (defmacro def-test-cas (name init incf op)
 122   `(with-test (:name ,name)
 123      (flet ((,name (n)
 124               (declare (fixnum n))
 125               (let* ((x ,init)
 126                      (run nil)
 127                      (threads
 128                       (loop repeat 10
 129                             collect (sb-thread:make-thread
 130                                      (lambda ()
 131                                        (loop until run
 132                                              do (sb-thread:thread-yield))
 133                                        (loop repeat n do (,incf x)))))))
 134                 (setf run t)
 135                 (dolist (th threads)
 136                   (sb-thread:join-thread th))
 137                 (assert (= (,op x) (* 10 n))))))
 138        (,name 200000))))
 139
 140 (def-test-cas test-cas-car (cons 0 nil) incf-car car)
 141 (def-test-cas test-cas-cdr (cons nil 0) incf-cdr cdr)
 142 (def-test-cas test-cas-slot (make-cas-struct) incf-slot cas-struct-slot)
 143 (def-test-cas test-cas-value (let ((x '.x.))
 144                                (set x 0)
 145                                x)
 146   incf-symbol-value symbol-value)
 147 (def-test-cas test-cas-svref/0 (vector 0 nil) incf-svref/0 (lambda (x)
 148                                                              (svref x 0)))
 149 (def-test-cas test-cas-svref/1 (vector nil 0) incf-svref/1 (lambda (x)
 150                                                              (svref x 1)))
 151 (format t "~&compare-and-swap tests done~%")
 152
 153 (with-test (:name (:threads :more-trivia)))
 154 (let ((old-threads (list-all-threads))
 155       (thread (make-thread (lambda ()
 156                              (assert (find *current-thread* *all-threads*))
 157                              (sleep 2))))
 158       (new-threads (list-all-threads)))
 159   (assert (thread-alive-p thread))
 160   (assert (eq thread (first new-threads)))
 161   (assert (= (1+ (length old-threads)) (length new-threads)))
 162   (sleep 3)
 163   (assert (not (thread-alive-p thread))))
 164
 165 (with-test (:name (:join-thread :nlx :default))
 166   (let ((sym (gensym)))
 167     (assert (eq sym (join-thread (make-thread (lambda () (sb-thread:abort-thread)))
 168                                  :default sym)))))
 169
 170 (with-test (:name (:join-thread :nlx :error))
 171   (raises-error? (join-thread (make-thread (lambda () (sb-thread:abort-thread))))
 172                  join-thread-error))
 173
 174 (with-test (:name (:join-thread :multiple-values))
 175   (assert (equal '(1 2 3)
 176                  (multiple-value-list
 177                   (join-thread (make-thread (lambda () (values 1 2 3))))))))
 178
 179 ;;; We had appalling scaling properties for a while.  Make sure they
 180 ;;; don't reappear.
 181 (defun scaling-test (function &optional (nthreads 5))
 182   "Execute FUNCTION with NTHREADS lurking to slow it down."
 183   (let ((queue (sb-thread:make-waitqueue))
 184         (mutex (sb-thread:make-mutex)))
 185     ;; Start NTHREADS idle threads.
 186     (dotimes (i nthreads)
 187       (make-join-thread (lambda ()
 188                           (with-mutex (mutex)
 189                             (sb-thread:condition-wait queue mutex))
 190                           (sb-thread:abort-thread))))
 191     (let ((start-time (get-internal-run-time)))
 192       (funcall function)
 193       (prog1 (- (get-internal-run-time) start-time)
 194         (sb-thread:condition-broadcast queue)))))
 195 (defun fact (n)
 196   "A function that does work with the CPU."
 197   (if (zerop n) 1 (* n (fact (1- n)))))
 198
 199 (with-test (:name :lurking-threads)
 200   (let ((work (lambda () (fact 15000))))
 201     (let ((zero (scaling-test work 0))
 202           (four (scaling-test work 4)))
 203       ;; a slightly weak assertion, but good enough for starters.
 204       (assert (< four (* 1.5 zero))))))
 205
 206 ;;; For one of the interupt-thread tests, we want a foreign function
 207 ;;; that does not make syscalls
 208
 209 #-win32
 210 (progn
 211   (with-open-file (o "threads-foreign.c" :direction :output :if-exists :supersede)
 212     (format o "void loop_forever() { while(1) ; }~%"))
 213   (sb-ext:run-program "/bin/sh"
 214                       '("run-compiler.sh" "-sbcl-pic" "-sbcl-shared"
 215                         "-o" "threads-foreign.so" "threads-foreign.c")
 216                       :environment (test-util::test-env))
 217   (sb-alien:load-shared-object (truename "threads-foreign.so"))
 218   (sb-alien:define-alien-routine loop-forever sb-alien:void)
 219   (delete-file "threads-foreign.c"))
 220
 221 ;;; elementary "can we get a lock and release it again"
 222 (with-test (:name (:mutex :basics))
 223   (let ((l (make-mutex :name "foo"))
 224         (p *current-thread*))
 225     (assert (eql (mutex-value l) nil) nil "1")
 226     (sb-thread:grab-mutex l)
 227     (assert (eql (mutex-value l) p) nil "3")
 228     (sb-thread:release-mutex l)
 229     (assert (eql (mutex-value l) nil) nil "5")))
 230
 231 (with-test (:name (:with-recursive-lock :basics))
 232   (labels ((ours-p (value)
 233              (eq *current-thread* value)))
 234     (let ((l (make-mutex :name "rec")))
 235       (assert (eql (mutex-value l) nil) nil "1")
 236       (sb-thread:with-recursive-lock (l)
 237         (assert (ours-p (mutex-value l)) nil "3")
 238         (sb-thread:with-recursive-lock (l)
 239           (assert (ours-p (mutex-value l)) nil "4"))
 240         (assert (ours-p (mutex-value l)) nil "5"))
 241       (assert (eql (mutex-value l) nil) nil "6"))))
 242
 243 (with-test (:name (:with-recursive-lock :wait-p))
 244   (let ((m (make-mutex)))
 245     (with-mutex (m)
 246       (assert (null (join-thread (make-thread
 247                                   (lambda ()
 248                                     (with-recursive-lock (m :wait-p nil)
 249                                       t)))))))
 250     (assert (join-thread (make-thread
 251                           (lambda ()
 252                             (with-recursive-lock (m :wait-p nil)
 253                               t)))))))
 254
 255 (with-test (:name (:with-recursive-lock :wait-p :recursive))
 256   (let ((m (make-mutex)))
 257     (assert (join-thread (make-thread
 258                           (lambda ()
 259                             (with-recursive-lock (m :wait-p nil)
 260                               (with-recursive-lock (m :wait-p nil)
 261                                 t))))))))
 262
 263 (with-test (:name (:with-recursive-lock :timeout))
 264   (let ((m (make-mutex)))
 265     (with-mutex (m)
 266       (assert (null (join-thread (make-thread
 267                                   (lambda ()
 268                                     (with-recursive-lock (m :timeout 0.1)
 269                                       t)))))))
 270     (assert (join-thread (make-thread
 271                           (lambda ()
 272                             (with-recursive-lock (m :timeout 0.1)
 273                               t)))))))
 274
 275 (with-test (:name (:with-recursive-lock :timeout :recursive))
 276   (let ((m (make-mutex)))
 277     (assert (join-thread (make-thread
 278                           (lambda ()
 279                             (with-recursive-lock (m :timeout 0.1)
 280                               (with-recursive-lock (m :timeout 0.1)
 281                                 t))))))))
 282
 283 (with-test (:name (:mutex :nesting-mutex-and-recursive-lock))
 284   (let ((l (make-mutex :name "a mutex")))
 285     (with-mutex (l)
 286       (with-recursive-lock (l)))))
 287
 288 ;; test that SLEEP actually sleeps for at least the given time, even
 289 ;; if interrupted by another thread exiting/a gc/anything
 290 (with-test (:name (:sleep :continue-sleeping-after-interrupt))
 291   (let ((start-time (get-universal-time)))
 292     (make-join-thread (lambda () (sleep 1) (sb-ext:gc :full t)))
 293     (sleep 5)
 294     (assert (>= (get-universal-time) (+ 5 start-time)))))
 295
 296
 297 (with-test (:name (:condition-wait :basics-1))
 298   (let ((queue (make-waitqueue :name "queue"))
 299         (lock (make-mutex :name "lock"))
 300         (n 0))
 301     (labels ((in-new-thread ()
 302                (with-mutex (lock)
 303                  (assert (eql (mutex-value lock) *current-thread*))
 304                  (format t "~A got mutex~%" *current-thread*)
 305                  ;; now drop it and sleep
 306                  (condition-wait queue lock)
 307                  ;; after waking we should have the lock again
 308                  (assert (eql (mutex-value lock) *current-thread*))
 309                  (assert (eql n 1))
 310                  (decf n))))
 311       (make-join-thread #'in-new-thread)
 312       (sleep 2)            ; give it  a chance to start
 313       ;; check the lock is free while it's asleep
 314       (format t "parent thread ~A~%" *current-thread*)
 315       (assert (eql (mutex-value lock) nil))
 316       (with-mutex (lock)
 317         (incf n)
 318         (condition-notify queue))
 319       (sleep 1))))
 320
 321 (with-test (:name (:condition-wait :basics-2))
 322   (let ((queue (make-waitqueue :name "queue"))
 323         (lock (make-mutex :name "lock")))
 324     (labels ((ours-p (value)
 325                (eq *current-thread* value))
 326              (in-new-thread ()
 327                (with-recursive-lock (lock)
 328                  (assert (ours-p (mutex-value lock)))
 329                  (format t "~A got mutex~%" (mutex-value lock))
 330                  ;; now drop it and sleep
 331                  (condition-wait queue lock)
 332                  ;; after waking we should have the lock again
 333                  (format t "woken, ~A got mutex~%" (mutex-value lock))
 334                  (assert (ours-p (mutex-value lock))))))
 335       (make-join-thread #'in-new-thread)
 336       (sleep 2)            ; give it  a chance to start
 337       ;; check the lock is free while it's asleep
 338       (format t "parent thread ~A~%" *current-thread*)
 339       (assert (eql (mutex-value lock) nil))
 340       (with-recursive-lock (lock)
 341         (condition-notify queue))
 342       (sleep 1))))
 343
 344 (with-test (:name (:mutex :contention))
 345   (let ((mutex (make-mutex :name "contended")))
 346     (labels ((run ()
 347                (let ((me *current-thread*))
 348                  (dotimes (i 100)
 349                    (with-mutex (mutex)
 350                      (sleep .03)
 351                      (assert (eql (mutex-value mutex) me)))
 352                    (assert (not (eql (mutex-value mutex) me))))
 353                  (format t "done ~A~%" *current-thread*))))
 354       (let ((kid1 (make-thread #'run))
 355             (kid2 (make-thread #'run)))
 356         (format t "contention ~A ~A~%" kid1 kid2)
 357         (wait-for-threads (list kid1 kid2))))))
 358
 359 ;;; GRAB-MUTEX
 360
 361 (with-test (:name (:grab-mutex :waitp nil))
 362   (let ((m (make-mutex)))
 363     (with-mutex (m)
 364       (assert (null (join-thread (make-thread
 365                                   #'(lambda ()
 366                                       (grab-mutex m :waitp nil)))))))))
 367
 368 (with-test (:name (:grab-mutex :timeout :acquisition-fail))
 369   (let ((m (make-mutex))
 370         (w (make-semaphore)))
 371     (with-mutex (m)
 372       (let ((th (make-thread
 373                  #'(lambda ()
 374                      (prog1
 375                          (grab-mutex m :timeout 0.1)
 376                        (signal-semaphore w))))))
 377         ;; Wait for it to -- otherwise the detect the deadlock chain
 378         ;; from JOIN-THREAD.
 379         (wait-on-semaphore w)
 380         (assert (null (join-thread th)))))))
 381
 382 (with-test (:name (:grab-mutex :timeout :acquisition-success))
 383   (let ((m (make-mutex))
 384         (child))
 385     (with-mutex (m)
 386       (setq child (make-thread #'(lambda () (grab-mutex m :timeout 1.0))))
 387       (sleep 0.2))
 388     (assert (eq (join-thread child) 't))))
 389
 390 (with-test (:name (:grab-mutex :timeout+deadline))
 391   (let ((m (make-mutex))
 392         (w (make-semaphore)))
 393     (with-mutex (m)
 394       (let ((th (make-thread #'(lambda ()
 395                                  (sb-sys:with-deadline (:seconds 0.0)
 396                                    (handler-case
 397                                        (grab-mutex m :timeout 0.0)
 398                                      (sb-sys:deadline-timeout ()
 399                                        (signal-semaphore w)
 400                                        :deadline)))))))
 401         (wait-on-semaphore w)
 402         (assert (eq (join-thread th) :deadline))))))
 403
 404 (with-test (:name (:grab-mutex :waitp+deadline))
 405   (let ((m (make-mutex)))
 406     (with-mutex (m)
 407       (assert (eq (join-thread
 408                    (make-thread #'(lambda ()
 409                                     (sb-sys:with-deadline (:seconds 0.0)
 410                                       (handler-case
 411                                           (grab-mutex m :waitp nil)
 412                                         (sb-sys:deadline-timeout ()
 413                                           :deadline))))))
 414                   'nil)))))
 415
 416 ;;; semaphores
 417
 418 (defmacro raises-timeout-p (&body body)
 419   `(handler-case (progn (progn ,@body) nil)
 420     (sb-ext:timeout () t)))
 421
 422 (with-test (:name (:semaphore :wait-forever))
 423   (let ((sem (make-semaphore :count 0)))
 424     (assert (raises-timeout-p
 425               (sb-ext:with-timeout 0.1
 426                 (wait-on-semaphore sem))))))
 427
 428 (with-test (:name (:semaphore :initial-count))
 429   (let ((sem (make-semaphore :count 1)))
 430     (sb-ext:with-timeout 0.1
 431       (wait-on-semaphore sem))))
 432
 433 (with-test (:name (:semaphore :wait-then-signal))
 434   (let ((sem (make-semaphore))
 435         (signalled-p nil))
 436     (make-join-thread (lambda ()
 437                         (sleep 0.1)
 438                         (setq signalled-p t)
 439                         (signal-semaphore sem)))
 440     (wait-on-semaphore sem)
 441     (assert signalled-p)))
 442
 443 (with-test (:name (:semaphore :signal-then-wait))
 444   (let ((sem (make-semaphore))
 445         (signalled-p nil))
 446     (make-join-thread (lambda ()
 447                         (signal-semaphore sem)
 448                         (setq signalled-p t)))
 449     (loop until signalled-p)
 450     (wait-on-semaphore sem)
 451     (assert signalled-p)))
 452
 453 (defun test-semaphore-multiple-signals (wait-on-semaphore)
 454   (let* ((sem (make-semaphore :count 5))
 455          (threads (loop repeat 20 collecting
 456                         (make-join-thread (lambda ()
 457                                             (funcall wait-on-semaphore sem))))))
 458     (flet ((count-live-threads ()
 459              (count-if #'thread-alive-p threads)))
 460       (sleep 0.5)
 461       (assert (= 15 (count-live-threads)))
 462       (signal-semaphore sem 10)
 463       (sleep 0.5)
 464       (assert (= 5 (count-live-threads)))
 465       (signal-semaphore sem 3)
 466       (sleep 0.5)
 467       (assert (= 2 (count-live-threads)))
 468       (signal-semaphore sem 4)
 469       (sleep 0.5)
 470       (assert (= 0 (count-live-threads))))))
 471
 472 (with-test (:name (:semaphore :multiple-signals))
 473   (test-semaphore-multiple-signals #'wait-on-semaphore))
 474
 475 (with-test (:name (:try-semaphore :trivial-fail))
 476   (assert (eq (try-semaphore (make-semaphore :count 0)) 'nil)))
 477
 478 (with-test (:name (:try-semaphore :trivial-success))
 479   (let ((sem (make-semaphore :count 1)))
 480     (assert (try-semaphore sem))
 481     (assert (zerop (semaphore-count sem)))))
 482
 483 (with-test (:name (:try-semaphore :trivial-fail :n>1))
 484   (assert (eq (try-semaphore (make-semaphore :count 1) 2) 'nil)))
 485
 486 (with-test (:name (:try-semaphore :trivial-success :n>1))
 487   (let ((sem (make-semaphore :count 10)))
 488     (assert (try-semaphore sem 5))
 489     (assert (try-semaphore sem 5))
 490     (assert (zerop (semaphore-count sem)))))
 491
 492 (with-test (:name (:try-semaphore :emulate-wait-on-semaphore))
 493   (flet ((busy-wait-on-semaphore (sem)
 494            (loop until (try-semaphore sem) do (sleep 0.001))))
 495     (test-semaphore-multiple-signals #'busy-wait-on-semaphore)))
 496
 497 ;;; Here we test that interrupting TRY-SEMAPHORE does not leave a
 498 ;;; semaphore in a bad state.
 499 (with-test (:name (:try-semaphore :interrupt-safe))
 500   (flet ((make-threads (count fn)
 501            (loop repeat count collect (make-thread fn)))
 502          (kill-thread (thread)
 503            (when (thread-alive-p thread)
 504              (ignore-errors (terminate-thread thread))))
 505          (count-live-threads (threads)
 506            (count-if #'thread-alive-p threads)))
 507     ;; WAITERS will already be waiting on the semaphore while
 508     ;; threads-being-interrupted will perform TRY-SEMAPHORE on that
 509     ;; semaphore, and MORE-WAITERS are new threads trying to wait on
 510     ;; the semaphore during the interruption-fire.
 511     (let* ((sem (make-semaphore :count 100))
 512            (waiters (make-threads 20 #'(lambda ()
 513                                          (wait-on-semaphore sem))))
 514            (triers  (make-threads 40 #'(lambda ()
 515                                          (sleep (random 0.01))
 516                                          (try-semaphore sem (1+ (random 5))))))
 517            (more-waiters
 518             (loop repeat 10
 519                   do (kill-thread (nth (random 40) triers))
 520                   collect (make-thread #'(lambda () (wait-on-semaphore sem)))
 521                   do (kill-thread (nth (random 40) triers)))))
 522       (sleep 0.5)
 523       ;; Now ensure that the waiting threads will all be waked up,
 524       ;; i.e. that the semaphore is still working.
 525       (loop repeat (+ (count-live-threads waiters)
 526                       (count-live-threads more-waiters))
 527             do (signal-semaphore sem))
 528       (sleep 0.5)
 529       (assert (zerop (count-live-threads triers)))
 530       (assert (zerop (count-live-threads waiters)))
 531       (assert (zerop (count-live-threads more-waiters))))))
 532
 533
 534
 535 (format t "~&semaphore tests done~%")
 536
 537 (defun test-interrupt (function-to-interrupt &optional quit-p)
 538   (let ((child  (make-kill-thread function-to-interrupt)))
 539     ;;(format t "gdb ./src/runtime/sbcl ~A~%attach ~A~%" child child)
 540     (sleep 2)
 541     (format t "interrupting child ~A~%" child)
 542     (interrupt-thread child
 543                       (lambda ()
 544                         (format t "child pid ~A~%" *current-thread*)
 545                         (when quit-p (abort-thread))))
 546     (sleep 1)
 547     child))
 548
 549 ;; separate tests for (a) interrupting Lisp code, (b) C code, (c) a syscall,
 550 ;; (d) waiting on a lock, (e) some code which we hope is likely to be
 551 ;; in pseudo-atomic
 552
 553 (with-test (:name (:interrupt-thread :more-basics))
 554   (let ((child (test-interrupt (lambda () (loop)))))
 555     (terminate-thread child)))
 556
 557 (with-test (:name (:interrupt-thread :interrupt-foreign-loop)
 558                   ;; This feature is explicitly unsupported on Win32.
 559                   :skipped-on :win32)
 560   (test-interrupt #'loop-forever :quit))
 561
 562 (with-test (:name (:interrupt-thread :interrupt-sleep))
 563   (let ((child (test-interrupt (lambda () (loop (sleep 2000))))))
 564     (terminate-thread child)
 565     (wait-for-threads (list child))))
 566
 567 (with-test (:name (:interrupt-thread :interrupt-mutex-acquisition))
 568   (let ((lock (make-mutex :name "loctite"))
 569         child)
 570     (with-mutex (lock)
 571       (setf child (test-interrupt
 572                    (lambda ()
 573                      (with-mutex (lock)
 574                        (assert (eql (mutex-value lock) *current-thread*)))
 575                      (assert (not (eql (mutex-value lock) *current-thread*)))
 576                      (sleep 10))))
 577       ;;hold onto lock for long enough that child can't get it immediately
 578       (sleep 5)
 579       (interrupt-thread child (lambda () (format t "l ~A~%" (mutex-value lock))))
 580       (format t "parent releasing lock~%"))
 581     (terminate-thread child)
 582     (wait-for-threads (list child))))
 583
 584 (format t "~&locking test done~%")
 585
 586 (defun alloc-stuff () (copy-list '(1 2 3 4 5)))
 587
 588 (with-test (:name (:interrupt-thread :interrupt-consing-child))
 589   (let ((thread (make-thread (lambda () (loop (alloc-stuff))))))
 590     (let ((killers
 591            (loop repeat 4 collect
 592                  (sb-thread:make-thread
 593                   (lambda ()
 594                     (loop repeat 25 do
 595                           (sleep (random 0.1d0))
 596                           (princ ".")
 597                           (force-output)
 598                           (sb-thread:interrupt-thread thread (lambda ()))))))))
 599       (wait-for-threads killers)
 600       (sb-thread:terminate-thread thread)
 601       (wait-for-threads (list thread))))
 602   (sb-ext:gc :full t))
 603
 604 (format t "~&multi interrupt test done~%")
 605
 606 #+(or x86 x86-64) ;; x86oid-only, see internal commentary.
 607 (with-test (:name (:interrupt-thread :interrupt-consing-child :again))
 608   (let ((c (make-thread (lambda () (loop (alloc-stuff))))))
 609     ;; NB this only works on x86: other ports don't have a symbol for
 610     ;; pseudo-atomic atomicity
 611     (dotimes (i 100)
 612       (sleep (random 0.1d0))
 613       (interrupt-thread c
 614                         (lambda ()
 615                           (princ ".") (force-output)
 616                           (assert (thread-alive-p *current-thread*))
 617                           (assert
 618                            (not (logbitp 0 SB-KERNEL:*PSEUDO-ATOMIC-BITS*))))))
 619     (terminate-thread c)
 620     (wait-for-threads (list c))))
 621
 622 (format t "~&interrupt test done~%")
 623
 624 (defstruct counter (n 0 :type sb-vm:word))
 625 (defvar *interrupt-counter* (make-counter))
 626
 627 (declaim (notinline check-interrupt-count))
 628 (defun check-interrupt-count (i)
 629   (declare (optimize (debug 1) (speed 1)))
 630   ;; This used to lose if eflags were not restored after an interrupt.
 631   (unless (typep i 'fixnum)
 632     (error "!!!!!!!!!!!")))
 633
 634 (with-test (:name (:interrupt-thread :interrupt-ATOMIC-INCF))
 635   (let ((c (make-thread
 636             (lambda ()
 637               (handler-bind ((error #'(lambda (cond)
 638                                         (princ cond)
 639                                         (sb-debug:backtrace
 640                                          most-positive-fixnum))))
 641                 (loop (check-interrupt-count
 642                        (counter-n *interrupt-counter*))))))))
 643     (let ((func (lambda ()
 644                   (princ ".")
 645                   (force-output)
 646                   (sb-ext:atomic-incf (counter-n *interrupt-counter*)))))
 647       (setf (counter-n *interrupt-counter*) 0)
 648       (dotimes (i 100)
 649         (sleep (random 0.1d0))
 650         (interrupt-thread c func))
 651       (loop until (= (counter-n *interrupt-counter*) 100) do (sleep 0.1))
 652       (terminate-thread c)
 653       (wait-for-threads (list c)))))
 654
 655 (format t "~&interrupt count test done~%")
 656
 657 (defvar *runningp* nil)
 658
 659 (with-test (:name (:interrupt-thread :no-nesting))
 660   (let ((thread (sb-thread:make-thread
 661                  (lambda ()
 662                    (catch 'xxx
 663                      (loop))))))
 664     (declare (special runningp))
 665     (sleep 0.2)
 666     (sb-thread:interrupt-thread thread
 667                                 (lambda ()
 668                                     (let ((*runningp* t))
 669                                       (sleep 1))))
 670     (sleep 0.2)
 671     (sb-thread:interrupt-thread thread
 672                                 (lambda ()
 673                                   (throw 'xxx *runningp*)))
 674     (assert (not (sb-thread:join-thread thread)))))
 675
 676 (with-test (:name (:interrupt-thread :nesting))
 677   (let ((thread (sb-thread:make-thread
 678                  (lambda ()
 679                    (catch 'xxx
 680                      (loop))))))
 681     (declare (special runningp))
 682     (sleep 0.2)
 683     (sb-thread:interrupt-thread thread
 684                                 (lambda ()
 685                                   (let ((*runningp* t))
 686                                     (sb-sys:with-interrupts
 687                                       (sleep 1)))))
 688     (sleep 0.2)
 689     (sb-thread:interrupt-thread thread
 690                                 (lambda ()
 691                                   (throw 'xxx *runningp*)))
 692     (assert (sb-thread:join-thread thread))))
 693
 694 (with-test (:name (:two-threads-running-gc))
 695   (let (a-done b-done)
 696     (make-join-thread (lambda ()
 697                         (dotimes (i 100)
 698                           (sb-ext:gc) (princ "\\") (force-output))
 699                         (setf a-done t)))
 700     (make-join-thread (lambda ()
 701                         (dotimes (i 25)
 702                           (sb-ext:gc :full t)
 703                           (princ "/") (force-output))
 704                         (setf b-done t)))
 705     (loop
 706       (when (and a-done b-done) (return))
 707       (sleep 1))))
 708
 709 (terpri)
 710
 711 (defun waste (&optional (n 100000))
 712   (loop repeat n do (make-string 16384)))
 713
 714 (with-test (:name (:one-thread-runs-gc-while-other-conses))
 715   (loop for i below 100 do
 716         (princ "!")
 717         (force-output)
 718         (make-join-thread
 719          #'(lambda ()
 720              (waste)))
 721         (waste)
 722         (sb-ext:gc)))
 723
 724 (terpri)
 725
 726 (defparameter *aaa* nil)
 727 (with-test (:name (:one-thread-runs-gc-while-other-conses :again))
 728   (loop for i below 100 do
 729         (princ "!")
 730         (force-output)
 731         (make-join-thread
 732          #'(lambda ()
 733              (let ((*aaa* (waste)))
 734                (waste))))
 735         (let ((*aaa* (waste)))
 736           (waste))
 737         (sb-ext:gc)))
 738
 739 (format t "~&gc test done~%")
 740
 741 ;; this used to deadlock on session-lock
 742 (with-test (:name (:no-session-deadlock))
 743   (make-join-thread (lambda () (sb-ext:gc))))
 744
 745 (defun exercise-syscall (fn reference-errno)
 746   (make-kill-thread
 747    (lambda ()
 748      (loop do
 749           (funcall fn)
 750           (let ((errno (sb-unix::get-errno)))
 751             (sleep (random 0.1d0))
 752             (unless (eql errno reference-errno)
 753               (format t "Got errno: ~A (~A) instead of ~A~%"
 754                       errno
 755                       (sb-unix::strerror)
 756                       reference-errno)
 757               (force-output)
 758               (abort-thread)))))))
 759
 760 ;; (nanosleep -1 0) does not fail on FreeBSD
 761 (with-test (:name (:exercising-concurrent-syscalls) :fails-on :win32)
 762   (let* (#-freebsd
 763          (nanosleep-errno (progn
 764                             (sb-unix:nanosleep -1 0)
 765                             (sb-unix::get-errno)))
 766          (open-errno (progn
 767                        (open "no-such-file"
 768                              :if-does-not-exist nil)
 769                        (sb-unix::get-errno)))
 770          (threads
 771           (list
 772            #-freebsd
 773            (exercise-syscall (lambda () (sb-unix:nanosleep -1 0)) nanosleep-errno)
 774            (exercise-syscall (lambda () (open "no-such-file"
 775                                               :if-does-not-exist nil))
 776                              open-errno)
 777            (make-join-thread (lambda () (loop (sb-ext:gc) (sleep 1)))))))
 778     (sleep 10)
 779     (princ "terminating threads")
 780     (dolist (thread threads)
 781       (sb-thread:terminate-thread thread))))
 782
 783 (format t "~&errno test done~%")
 784
 785 (with-test (:name :all-threads-have-abort-restart)
 786   (loop repeat 100 do
 787         (let ((thread (make-kill-thread (lambda () (sleep 0.1)))))
 788           (sb-thread:interrupt-thread
 789            thread
 790            (lambda ()
 791              (assert (find-restart 'abort)))))))
 792
 793 (sb-ext:gc :full t)
 794
 795 (format t "~&thread startup sigmask test done~%")
 796
 797 (with-test (:name (:debugger-no-hang-on-session-lock-if-interrupted)
 798                   :fails-on :win32)
 799   #+win32 (error "user would have to touch a key interactively to proceed")
 800   (sb-debug::enable-debugger)
 801   (let* ((main-thread *current-thread*)
 802          (interruptor-thread
 803           (make-thread (lambda ()
 804                          (sleep 2)
 805                          (interrupt-thread main-thread
 806                                            (lambda ()
 807                                              (with-interrupts
 808                                                (break))))
 809                          (sleep 2)
 810                          (interrupt-thread main-thread #'continue))
 811                        :name "interruptor")))
 812     (with-session-lock (*session*)
 813       (sleep 3))
 814     (loop while (thread-alive-p interruptor-thread))))
 815
 816 (format t "~&session lock test done~%")
 817
 818 ;; expose thread creation races by exiting quickly
 819 (with-test (:name (:no-thread-creation-race :light))
 820   (make-join-thread (lambda ())))
 821
 822 (with-test (:name (:no-thread-creation-race :heavy))
 823   (loop repeat 20 do
 824         (wait-for-threads
 825          (loop for i below 100 collect
 826                (sb-thread:make-thread (lambda ()))))))
 827
 828 (format t "~&creation test done~%")
 829
 830 ;; interrupt handlers are per-thread with pthreads, make sure the
 831 ;; handler installed in one thread is global
 832 (with-test (:name (:global-interrupt-handler))
 833   (make-join-thread
 834    (lambda ()
 835      (sb-ext:run-program "sleep" '("1") :search t :wait nil))))
 836
 837 ;;;; Binding stack safety
 838
 839 (defparameter *x* nil)
 840 (defparameter *n-gcs-requested* 0)
 841 (defparameter *n-gcs-done* 0)
 842
 843 (let ((counter 0))
 844   (defun make-something-big ()
 845     (let ((x (make-string 32000)))
 846       (incf counter)
 847       (let ((counter counter))
 848         (sb-ext:finalize x (lambda () (format t " ~S" counter)
 849                                    (force-output)))))))
 850
 851 (defmacro wait-for-gc ()
 852   `(progn
 853      (incf *n-gcs-requested*)
 854      (loop while (< *n-gcs-done* *n-gcs-requested*))))
 855
 856 (defun send-gc ()
 857   (loop until (< *n-gcs-done* *n-gcs-requested*))
 858   (format t "G")
 859   (force-output)
 860   (sb-ext:gc)
 861   (incf *n-gcs-done*))
 862
 863 #+(or x86 x86-64) ;the only platforms with a *binding-stack-pointer* variable
 864 (defun exercise-binding ()
 865   (loop
 866    (let ((*x* (make-something-big)))
 867      (let ((*x* 42))
 868        ;; at this point the binding stack looks like this:
 869        ;; NO-TLS-VALUE-MARKER, *x*, SOMETHING, *x*
 870        t))
 871    (wait-for-gc)
 872    ;; sig_stop_for_gc_handler binds FREE_INTERRUPT_CONTEXT_INDEX. By
 873    ;; now SOMETHING is gc'ed and the binding stack looks like this: 0,
 874    ;; 0, SOMETHING, 0 (because the symbol slots are zeroed on
 875    ;; unbinding but values are not).
 876    (let ((*x* nil)
 877          (binding-pointer-delta (ash 2 (- sb-vm:word-shift sb-vm:n-fixnum-tag-bits))))
 878      ;; bump bsp as if a BIND had just started
 879      (incf sb-vm::*binding-stack-pointer* binding-pointer-delta)
 880      (wait-for-gc)
 881      (decf sb-vm::*binding-stack-pointer* binding-pointer-delta))))
 882
 883 #+(or x86 x86-64) ;the only platforms with a *binding-stack-pointer* variable
 884 (with-test (:name (:binding-stack-gc-safety))
 885   (let (threads)
 886     (unwind-protect
 887          (progn
 888            (push (make-kill-thread #'exercise-binding) threads)
 889            (push (make-kill-thread (lambda ()
 890                                      (loop
 891                                       (sleep 0.1)
 892                                       (send-gc))))
 893                  threads)
 894            (sleep 4))
 895       (mapc #'sb-thread:terminate-thread threads))))
 896
 897 (format t "~&binding test done~%")
 898
 899 ;;; HASH TABLES
 900
 901 (defvar *errors* nil)
 902
 903 (defun oops (e)
 904   (setf *errors* e)
 905   (format t "~&oops: ~A in ~S~%" e *current-thread*)
 906   (sb-debug:backtrace)
 907   (catch 'done))
 908
 909 (with-test (:name (:unsynchronized-hash-table)
 910                   ;; FIXME: This test occasionally eats out craploads
 911                   ;; of heap instead of expected error early. Not 100%
 912                   ;; sure if it would finish as expected, but since it
 913                   ;; hits swap on my system I'm not likely to find out
 914                   ;; soon. Disabling for now. -- nikodemus
 915             :skipped-on :sbcl)
 916   ;; We expect a (probable) error here: parellel readers and writers
 917   ;; on a hash-table are not expected to work -- but we also don't
 918   ;; expect this to corrupt the image.
 919   (let* ((hash (make-hash-table))
 920          (*errors* nil)
 921          (threads (list (make-kill-thread
 922                          (lambda ()
 923                            (catch 'done
 924                              (handler-bind ((serious-condition 'oops))
 925                                (loop
 926                                  ;;(princ "1") (force-output)
 927                                  (setf (gethash (random 100) hash) 'h)))))
 928                          :name "writer")
 929                         (make-kill-thread
 930                          (lambda ()
 931                            (catch 'done
 932                              (handler-bind ((serious-condition 'oops))
 933                                (loop
 934                                  ;;(princ "2") (force-output)
 935                                  (remhash (random 100) hash)))))
 936                          :name "reader")
 937                         (make-kill-thread
 938                          (lambda ()
 939                            (catch 'done
 940                              (handler-bind ((serious-condition 'oops))
 941                                (loop
 942                                  (sleep (random 1.0))
 943                                  (sb-ext:gc :full t)))))
 944                          :name "collector"))))
 945     (unwind-protect
 946          (sleep 10)
 947       (mapc #'sb-thread:terminate-thread threads))))
 948
 949 (format t "~&unsynchronized hash table test done~%")
 950
 951 (with-test (:name (:synchronized-hash-table))
 952   (let* ((hash (make-hash-table :synchronized t))
 953          (*errors* nil)
 954          (threads (list (make-join-thread
 955                          (lambda ()
 956                            (catch 'done
 957                              (handler-bind ((serious-condition 'oops))
 958                                (loop
 959                                  ;;(princ "1") (force-output)
 960                                  (setf (gethash (random 100) hash) 'h)))))
 961                          :name "writer")
 962                         (make-join-thread
 963                          (lambda ()
 964                            (catch 'done
 965                              (handler-bind ((serious-condition 'oops))
 966                                (loop
 967                                  ;;(princ "2") (force-output)
 968                                  (remhash (random 100) hash)))))
 969                          :name "reader")
 970                         (make-join-thread
 971                          (lambda ()
 972                            (catch 'done
 973                              (handler-bind ((serious-condition 'oops))
 974                                (loop
 975                                  (sleep (random 1.0))
 976                                  (sb-ext:gc :full t)))))
 977                          :name "collector"))))
 978     (unwind-protect
 979          (sleep 10)
 980       (mapc #'sb-thread:terminate-thread threads))
 981     (assert (not *errors*))))
 982
 983 (format t "~&synchronized hash table test done~%")
 984
 985 (with-test (:name (:hash-table-parallel-readers))
 986   (let ((hash (make-hash-table))
 987         (*errors* nil))
 988     (loop repeat 50
 989           do (setf (gethash (random 100) hash) 'xxx))
 990     (let ((threads (list (make-kill-thread
 991                           (lambda ()
 992                             (catch 'done
 993                               (handler-bind ((serious-condition 'oops))
 994                                 (loop
 995                                       until (eq t (gethash (random 100) hash))))))
 996                           :name "reader 1")
 997                          (make-kill-thread
 998                           (lambda ()
 999                             (catch 'done
1000                               (handler-bind ((serious-condition 'oops))
1001                                 (loop
1002                                       until (eq t (gethash (random 100) hash))))))
1003                           :name "reader 2")
1004                          (make-kill-thread
1005                           (lambda ()
1006                             (catch 'done
1007                               (handler-bind ((serious-condition 'oops))
1008                                 (loop
1009                                       until (eq t (gethash (random 100) hash))))))
1010                           :name "reader 3")
1011                          (make-kill-thread
1012                           (lambda ()
1013                             (catch 'done
1014                               (handler-bind ((serious-condition 'oops))
1015                                (loop
1016                                  (sleep (random 1.0))
1017                                  (sb-ext:gc :full t)))))
1018                           :name "collector"))))
1019       (unwind-protect
1020            (sleep 10)
1021         (mapc #'sb-thread:terminate-thread threads))
1022       (assert (not *errors*)))))
1023
1024 (format t "~&multiple reader hash table test done~%")
1025
1026 (with-test (:name (:hash-table-single-accessor-parallel-gc))
1027   (let ((hash (make-hash-table))
1028         (*errors* nil))
1029     (let ((threads (list (make-kill-thread
1030                           (lambda ()
1031                             (handler-bind ((serious-condition 'oops))
1032                               (loop
1033                                 (let ((n (random 100)))
1034                                   (if (gethash n hash)
1035                                       (remhash n hash)
1036                                       (setf (gethash n hash) 'h))))))
1037                           :name "accessor")
1038                          (make-kill-thread
1039                           (lambda ()
1040                             (handler-bind ((serious-condition 'oops))
1041                               (loop
1042                                 (sleep (random 1.0))
1043                                 (sb-ext:gc :full t))))
1044                           :name "collector"))))
1045       (unwind-protect
1046            (sleep 10)
1047         (mapc #'sb-thread:terminate-thread threads))
1048       (assert (not *errors*)))))
1049
1050 (format t "~&single accessor hash table test~%")
1051
1052 #|  ;; a cll post from eric marsden
1053 | (defun crash ()
1054 |   (setq *debugger-hook*
1055 |         (lambda (condition old-debugger-hook)
1056 |           (debug:backtrace 10)
1057 |           (unix:unix-exit 2)))
1058 |   #+live-dangerously
1059 |   (mp::start-sigalrm-yield)
1060 |   (flet ((roomy () (loop (with-output-to-string (*standard-output*) (room)))))
1061 |     (mp:make-process #'roomy)
1062 |     (mp:make-process #'roomy)))
1063 |#
1064
1065 (with-test (:name (:condition-variable :notify-multiple))
1066   (flet ((tester (notify-fun)
1067            (let ((queue (make-waitqueue :name "queue"))
1068                  (lock (make-mutex :name "lock"))
1069                  (data nil))
1070              (labels ((test (x)
1071                         (loop
1072                            (with-mutex (lock)
1073                              (format t "condition-wait ~a~%" x)
1074                              (force-output)
1075                              (condition-wait queue lock)
1076                              (format t "woke up ~a~%" x)
1077                              (force-output)
1078                              (push x data)))))
1079                (let ((threads (loop for x from 1 to 10
1080                                     collect
1081                                     (let ((x x))
1082                                       (make-kill-thread (lambda ()
1083                                                           (test x)))))))
1084                  (sleep 5)
1085                  (with-mutex (lock)
1086                    (funcall notify-fun queue))
1087                  (sleep 5)
1088                  (mapcar #'terminate-thread threads)
1089                  ;; Check that all threads woke up at least once
1090                  (assert (= (length (remove-duplicates data)) 10)))))))
1091     (tester (lambda (queue)
1092               (format t "~&(condition-notify queue 10)~%")
1093               (force-output)
1094               (condition-notify queue 10)))
1095     (tester (lambda (queue)
1096               (format t "~&(condition-broadcast queue)~%")
1097               (force-output)
1098               (condition-broadcast queue)))))
1099
1100 (format t "waitqueue wakeup tests done~%")
1101
1102 ;;; Make sure that a deadline handler is not invoked twice in a row in
1103 ;;; CONDITION-WAIT. See LP #512914 for a detailed explanation.
1104 ;;;
1105 (with-test (:name (:condition-wait :deadlines :LP-512914))
1106   (let ((n 2)                      ; was empirically enough to trigger the bug
1107         (mutex (sb-thread:make-mutex))
1108         (waitq (sb-thread:make-waitqueue))
1109         (threads nil)
1110         (deadline-handler-run-twice? nil))
1111     (dotimes (i n)
1112       (let ((child
1113               (sb-thread:make-thread
1114                #'(lambda ()
1115                    (handler-bind
1116                        ((sb-sys:deadline-timeout
1117                           (let ((already? nil))
1118                             #'(lambda (c)
1119                                 (when already?
1120                                   (setq deadline-handler-run-twice? t))
1121                                 (setq already? t)
1122                                 (sleep 0.2)
1123                                 (sb-thread:condition-broadcast waitq)
1124                                 (sb-sys:defer-deadline 10.0 c)))))
1125                      (sb-sys:with-deadline (:seconds 0.1)
1126                        (sb-thread:with-mutex (mutex)
1127                          (sb-thread:condition-wait waitq mutex))))))))
1128         (push child threads)))
1129     (mapc #'sb-thread:join-thread threads)
1130     (assert (not deadline-handler-run-twice?))))
1131
1132 (with-test (:name (:condition-wait :signal-deadline-with-interrupts-enabled))
1133   (let ((mutex (sb-thread:make-mutex))
1134         (waitq (sb-thread:make-waitqueue))
1135         (A-holds? :unknown)
1136         (B-holds? :unknown)
1137         (A-interrupts-enabled? :unknown)
1138         (B-interrupts-enabled? :unknown)
1139         (A)
1140         (B))
1141     ;; W.L.O.G., we assume that A is executed first...
1142     (setq A (sb-thread:make-thread
1143              #'(lambda ()
1144                  (handler-bind
1145                      ((sb-sys:deadline-timeout
1146                        #'(lambda (c)
1147                            ;; We came here through the call to DECODE-TIMEOUT
1148                            ;; in CONDITION-WAIT; hence both here are supposed
1149                            ;; to evaluate to T.
1150                            (setq A-holds? (sb-thread:holding-mutex-p mutex))
1151                            (setq A-interrupts-enabled?
1152                                  sb-sys:*interrupts-enabled*)
1153                            (sleep 0.2)
1154                            (sb-thread:condition-broadcast waitq)
1155                            (sb-sys:defer-deadline 10.0 c))))
1156                    (sb-sys:with-deadline (:seconds 0.1)
1157                      (sb-thread:with-mutex (mutex)
1158                        (sb-thread:condition-wait waitq mutex)))))
1159              :name "A"))
1160     (setq B (sb-thread:make-thread
1161              #'(lambda ()
1162                  (thread-yield)
1163                  (handler-bind
1164                      ((sb-sys:deadline-timeout
1165                        #'(lambda (c)
1166                            ;; We came here through the call to DECODE-TIMEOUT
1167                            ;; in CONDITION-WAIT (contended case of
1168                            ;; reaquiring the mutex) - so the former will
1169                            ;; be NIL, but interrupts should still be enabled.
1170                            (setq B-holds? (sb-thread:holding-mutex-p mutex))
1171                            (setq B-interrupts-enabled?
1172                                  sb-sys:*interrupts-enabled*)
1173                            (sleep 0.2)
1174                            (sb-thread:condition-broadcast waitq)
1175                            (sb-sys:defer-deadline 10.0 c))))
1176                    (sb-sys:with-deadline (:seconds 0.1)
1177                      (sb-thread:with-mutex (mutex)
1178                        (sb-thread:condition-wait waitq mutex)))))
1179              :name "B"))
1180     (sb-thread:join-thread A)
1181     (sb-thread:join-thread B)
1182     (let ((A-result (list A-holds? A-interrupts-enabled?))
1183           (B-result (list B-holds? B-interrupts-enabled?)))
1184       ;; We also check some subtle behaviour w.r.t. whether a deadline
1185       ;; handler in CONDITION-WAIT got the mutex, or not. This is most
1186       ;; probably very internal behaviour (so user should not depend
1187       ;; on it) -- I added the testing here just to manifest current
1188       ;; behaviour.
1189       (cond ((equal A-result '(t t)) (assert (equal B-result '(nil t))))
1190             ((equal B-result '(t t)) (assert (equal A-result '(nil t))))
1191             (t
1192              (error "Failure: fell through wit A: ~S, B: ~S"
1193                     A-result
1194                     B-result))))))
1195
1196 (with-test (:name (:mutex :finalization))
1197   (let ((a nil))
1198     (dotimes (i 500000)
1199       (setf a (make-mutex)))))
1200
1201 (format t "mutex finalization test done~%")
1202
1203 ;;; Check that INFO is thread-safe, at least when we're just doing reads.
1204
1205 (let* ((symbols (loop repeat 10000 collect (gensym)))
1206        (functions (loop for (symbol . rest) on symbols
1207                         for next = (car rest)
1208                         for fun = (let ((next next))
1209                                     (lambda (n)
1210                                       (if next
1211                                           (funcall next (1- n))
1212                                           n)))
1213                         do (setf (symbol-function symbol) fun)
1214                         collect fun)))
1215   (defun infodb-test ()
1216     (funcall (car functions) 9999)))
1217
1218 (with-test (:name (:infodb :read))
1219   (let* ((ok t)
1220          (threads (loop for i from 0 to 10
1221                         collect (sb-thread:make-thread
1222                                  (lambda ()
1223                                    (dotimes (j 100)
1224                                      (write-char #\-)
1225                                      (finish-output)
1226                                      (let ((n (infodb-test)))
1227                                        (unless (zerop n)
1228                                          (setf ok nil)
1229                                          (format t "N != 0 (~A)~%" n)
1230                                          (abort-thread)))))))))
1231     (wait-for-threads threads)
1232     (assert ok)))
1233
1234 (format t "infodb test done~%")
1235
1236 (with-test (:name :backtrace)
1237   ;; Printing backtraces from several threads at once used to hang the
1238   ;; whole SBCL process (discovered by accident due to a timer.impure
1239   ;; test misbehaving). The cause was that packages weren't even
1240   ;; thread-safe for only doing FIND-SYMBOL, and while printing
1241   ;; backtraces a loot of symbol lookups need to be done due to
1242   ;; *PRINT-ESCAPE*.
1243   (let* ((threads (loop repeat 10
1244                         collect (sb-thread:make-thread
1245                                  (lambda ()
1246                                    (dotimes (i 1000)
1247                                      (with-output-to-string (*debug-io*)
1248                                        (sb-debug::backtrace 10))))))))
1249     (wait-for-threads threads)))
1250
1251 (format t "backtrace test done~%")
1252
1253 (format t "~&starting gc deadlock test: WARNING: THIS TEST WILL HANG ON FAILURE!~%")
1254
1255 (with-test (:name :gc-deadlock)
1256   ;; Prior to 0.9.16.46 thread exit potentially deadlocked the
1257   ;; GC due to *all-threads-lock* and session lock. On earlier
1258   ;; versions and at least on one specific box this test is good enough
1259   ;; to catch that typically well before the 1500th iteration.
1260   (loop
1261      with i = 0
1262      with n = 3000
1263      while (< i n)
1264      do
1265        (incf i)
1266        (when (zerop (mod i 100))
1267          (write-char #\.)
1268          (force-output))
1269        (handler-case
1270            (if (oddp i)
1271                (make-join-thread
1272                 (lambda ()
1273                   (sleep (random 0.001)))
1274                 :name (format nil "SLEEP-~D" i))
1275                (make-join-thread
1276                 (lambda ()
1277                   ;; KLUDGE: what we are doing here is explicit,
1278                   ;; but the same can happen because of a regular
1279                   ;; MAKE-THREAD or LIST-ALL-THREADS, and various
1280                   ;; session functions.
1281                   (sb-thread::with-all-threads-lock
1282                     (sb-thread::with-session-lock (sb-thread::*session*)
1283                       (sb-ext:gc))))
1284                 :name (format nil "GC-~D" i)))
1285          (error (e)
1286            (format t "~%error creating thread ~D: ~A -- backing off for retry~%" i e)
1287            (sleep 0.1)
1288            (incf i)))))
1289
1290 (format t "~&gc deadlock test done~%")
1291 \f
1292 (let ((count (make-array 8 :initial-element 0)))
1293   (defun closure-one ()
1294     (declare (optimize safety))
1295     (values (incf (aref count 0)) (incf (aref count 1))
1296             (incf (aref count 2)) (incf (aref count 3))
1297             (incf (aref count 4)) (incf (aref count 5))
1298             (incf (aref count 6)) (incf (aref count 7))))
1299   (defun no-optimizing-away-closure-one ()
1300     (setf count (make-array 8 :initial-element 0))))
1301
1302 (defstruct box
1303   (count 0))
1304
1305 (let ((one (make-box))
1306       (two (make-box))
1307       (three (make-box)))
1308   (defun closure-two ()
1309     (declare (optimize safety))
1310     (values (incf (box-count one)) (incf (box-count two)) (incf (box-count three))))
1311   (defun no-optimizing-away-closure-two ()
1312     (setf one (make-box)
1313           two (make-box)
1314           three (make-box))))
1315
1316 ;;; PowerPC safepoint builds occasionally hang or busy-loop (or
1317 ;;; sometimes run out of memory) in the following test.  For developers
1318 ;;; interested in debugging this combination of features, it might be
1319 ;;; fruitful to concentrate their efforts around this test...
1320
1321 (with-test (:name (:funcallable-instances)
1322                   :skipped-on '(and :sb-safepoint
1323                                     (not :c-stack-is-control-stack)))
1324   ;; the funcallable-instance implementation used not to be threadsafe
1325   ;; against setting the funcallable-instance function to a closure
1326   ;; (because the code and lexenv were set separately).
1327   (let ((fun (sb-kernel:%make-funcallable-instance 0))
1328         (condition nil))
1329     (setf (sb-kernel:funcallable-instance-fun fun) #'closure-one)
1330     (flet ((changer ()
1331              (loop (setf (sb-kernel:funcallable-instance-fun fun) #'closure-one)
1332                    (setf (sb-kernel:funcallable-instance-fun fun) #'closure-two)))
1333            (test ()
1334              (handler-case (loop (funcall fun))
1335                (serious-condition (c) (setf condition c)))))
1336       (let ((changer (make-thread #'changer))
1337             (test (make-thread #'test)))
1338         (handler-case
1339             (progn
1340               ;; The two closures above are fairly carefully crafted
1341               ;; so that if given the wrong lexenv they will tend to
1342               ;; do some serious damage, but it is of course difficult
1343               ;; to predict where the various bits and pieces will be
1344               ;; allocated.  Five seconds failed fairly reliably on
1345               ;; both my x86 and x86-64 systems.  -- CSR, 2006-09-27.
1346               (sb-ext:with-timeout 5
1347                 (wait-for-threads (list test)))
1348               (error "~@<test thread got condition:~2I~_~A~@:>" condition))
1349           (sb-ext:timeout ()
1350             (terminate-thread changer)
1351             (terminate-thread test)
1352             (wait-for-threads (list changer test))))))))
1353
1354 (format t "~&funcallable-instance test done~%")
1355
1356 (defun random-type (n)
1357   `(integer ,(random n) ,(+ n (random n))))
1358
1359 (defun subtypep-hash-cache-test ()
1360   (dotimes (i 10000)
1361     (let ((type1 (random-type 500))
1362           (type2 (random-type 500)))
1363       (let ((a (subtypep type1 type2)))
1364         (dotimes (i 100)
1365           (assert (eq (subtypep type1 type2) a))))))
1366   (format t "ok~%")
1367   (force-output))
1368
1369 (with-test (:name (:hash-cache :subtypep))
1370   (mapc #'join-thread
1371         (loop repeat 10
1372               collect (sb-thread:make-thread #'subtypep-hash-cache-test))))
1373 (format t "hash-cache tests done~%")
1374
1375 ;;;; BLACK BOX TESTS
1376
1377 (in-package :cl-user)
1378 (use-package :test-util)
1379 (use-package "ASSERTOID")
1380
1381 (format t "parallel defclass test -- WARNING, WILL HANG ON FAILURE!~%")
1382 (with-test (:name :parallel-defclass)
1383   (defclass test-1 () ((a :initform :orig-a)))
1384   (defclass test-2 () ((b :initform :orig-b)))
1385   (defclass test-3 (test-1 test-2) ((c :initform :orig-c)))
1386   ;; This test is more likely to pass on Windows with the FORCE-OUTPUT
1387   ;; calls disabled in the folloving code.  (As seen on a Server 2012
1388   ;; installation.)  Clearly, this sort of workaround in a test is
1389   ;; cheating, and might be hiding the underlying bug that the test is
1390   ;; exposing.  Let's review this later.
1391   (let* ((run t)
1392          (d1 (sb-thread:make-thread (lambda ()
1393                                       (loop while run
1394                                             do (defclass test-1 () ((a :initform :new-a)))
1395                                             (write-char #\1)
1396                                             #-win32 (force-output)))
1397                                     :name "d1"))
1398          (d2 (sb-thread:make-thread (lambda ()
1399                                       (loop while run
1400                                             do (defclass test-2 () ((b :initform :new-b)))
1401                                                (write-char #\2)
1402                                                #-win32 (force-output)))
1403                                     :name "d2"))
1404          (d3 (sb-thread:make-thread (lambda ()
1405                                       (loop while run
1406                                             do (defclass test-3 (test-1 test-2) ((c :initform :new-c)))
1407                                                (write-char #\3)
1408                                                #-win32 (force-output)))
1409                                     :name "d3"))
1410          (i (sb-thread:make-thread (lambda ()
1411                                      (loop while run
1412                                            do (let ((i (make-instance 'test-3)))
1413                                                 (assert (member (slot-value i 'a) '(:orig-a :new-a)))
1414                                                 (assert (member (slot-value i 'b) '(:orig-b :new-b)))
1415                                                 (assert (member (slot-value i 'c) '(:orig-c :new-c))))
1416                                               (write-char #\i)
1417                                               #-win32 (force-output)))
1418                                    :name "i")))
1419     (format t "~%sleeping!~%")
1420     (sleep 2.0)
1421     (format t "~%stopping!~%")
1422     (setf run nil)
1423     (mapc (lambda (th)
1424             (sb-thread:join-thread th)
1425             (format t "~%joined ~S~%" (sb-thread:thread-name th)))
1426           (list d1 d2 d3 i))
1427     (force-output)))
1428 (format t "parallel defclass test done~%")
1429
1430 (with-test (:name (:deadlock-detection :interrupts) :fails-on :win32)
1431   #+win32                               ;be more explicit than just :skipped-on
1432   (error "not attempting, because of deadlock error in background thread")
1433   (let* ((m1 (sb-thread:make-mutex :name "M1"))
1434          (m2 (sb-thread:make-mutex :name "M2"))
1435          (t1-can-go (sb-thread:make-semaphore :name "T1 can go"))
1436          (t2-can-go (sb-thread:make-semaphore :name "T2 can go"))
1437          (t1 (sb-thread:make-thread
1438               (lambda ()
1439                 (sb-thread:with-mutex (m1)
1440                   (sb-thread:wait-on-semaphore t1-can-go)
1441                   :ok1))
1442               :name "T1"))
1443          (t2 (sb-thread:make-thread
1444               (lambda ()
1445                 (sb-ext:wait-for (eq t1 (sb-thread:mutex-owner m1)))
1446                 (sb-thread:with-mutex (m1 :wait-p t)
1447                   (sb-thread:wait-on-semaphore t2-can-go)
1448                   :ok2))
1449               :name "T2")))
1450     (sb-ext:wait-for (eq m1 (sb-thread::thread-waiting-for t2)))
1451     (sb-thread:interrupt-thread t2 (lambda ()
1452                                      (sb-thread:with-mutex (m2 :wait-p t)
1453                                        (sb-ext:wait-for
1454                                         (eq m2 (sb-thread::thread-waiting-for t1)))
1455                                        (sb-thread:signal-semaphore t2-can-go))))
1456     (sb-ext:wait-for (eq t2 (sb-thread:mutex-owner m2)))
1457     (sb-thread:interrupt-thread t1 (lambda ()
1458                                      (sb-thread:with-mutex (m2 :wait-p t)
1459                                        (sb-thread:signal-semaphore t1-can-go))))
1460     ;; both threads should finish without a deadlock or deadlock
1461     ;; detection error
1462     (let ((res (list (sb-thread:join-thread t1)
1463                      (sb-thread:join-thread t2))))
1464       (assert (equal '(:ok1 :ok2) res)))))
1465
1466 (with-test (:name (:deadlock-detection :gc))
1467   ;; To semi-reliably trigger the error (in SBCL's where)
1468   ;; it was present you had to run this for > 30 seconds,
1469   ;; but that's a bit long for a single test.
1470   (let* ((stop (+ 5 (get-universal-time)))
1471          (m1 (sb-thread:make-mutex :name "m1"))
1472          (t1 (sb-thread:make-thread
1473               (lambda ()
1474                 (loop until (> (get-universal-time) stop)
1475                       do (sb-thread:with-mutex (m1)
1476                            (eval `(make-array 24))))
1477                 :ok)))
1478          (t2 (sb-thread:make-thread
1479               (lambda ()
1480                 (loop until (> (get-universal-time) stop)
1481                       do (sb-thread:with-mutex (m1)
1482                            (eval `(make-array 24))))
1483                 :ok))))
1484     (let ((res (list (sb-thread:join-thread t1)
1485                      (sb-thread:join-thread t2))))
1486       (assert (equal '(:ok :ok) res)))))
1487
1488 (with-test (:name :spinlock-api)
1489   (let* ((warned 0)
1490          (funs
1491            (handler-bind ((sb-int:early-deprecation-warning (lambda (_)
1492                                                               (declare (ignore _))
1493                                                               (incf warned))))
1494              (list (compile nil `(lambda (lock)
1495                                    (sb-thread::with-spinlock (lock)
1496                                      t)))
1497                    (compile nil `(lambda ()
1498                                    (sb-thread::make-spinlock :name "foo")))
1499                    (compile nil `(lambda (lock)
1500                                    (sb-thread::get-spinlock lock)))
1501                    (compile nil `(lambda (lock)
1502                                    (sb-thread::release-spinlock lock)))))))
1503     (assert (eql 4 warned))
1504     (handler-bind ((warning #'error))
1505       (destructuring-bind (with make get release) funs
1506         (let ((lock (funcall make)))
1507           (funcall get lock)
1508           (funcall release lock)
1509           (assert (eq t (funcall with lock))))))))
1510
1511 (with-test (:name :interrupt-io-unnamed-pipe)
1512   (let (result)
1513     (labels
1514         ((reader (fd)
1515            (let ((stream (sb-sys:make-fd-stream fd
1516                                                 :element-type :default
1517                                                 :serve-events nil)))
1518              (time
1519               (let ((ok (handler-case
1520                             (catch 'stop
1521                               (progn
1522                                 (read-char stream)
1523                                 (sleep 0.1)
1524                                 (sleep 0.1)
1525                                 (sleep 0.1)))
1526                           (error (c)
1527                             c))))
1528                 (setf result ok)
1529                 (progn
1530                   (format *trace-output* "~&=> ~A~%" ok)
1531                   (force-output *trace-output*))))
1532              (sleep 2)
1533              (ignore-errors (close stream))))
1534
1535          (writer ()
1536            (multiple-value-bind (read write)
1537                (sb-unix:unix-pipe)
1538              (let* ((reader (sb-thread:make-thread (lambda () (reader read))))
1539                     (stream (sb-sys:make-fd-stream write
1540                                                    :output t
1541                                                    :element-type :default
1542                                                    :serve-events nil))
1543                     (ok :ok))
1544                (sleep 1)
1545                (sb-thread:interrupt-thread reader (lambda ()
1546                                                     (print :throwing)
1547                                                     (force-output)
1548                                                     (throw 'stop ok)))
1549                (sleep 1)
1550                (setf ok :not-ok)
1551                (write-char #\x stream)
1552                (close stream)
1553                (sb-thread:join-thread reader)))))
1554       (writer))
1555     (assert (eq result :ok))))