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-select* :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 (assert (eql 1 (length (list-all-threads))))
  27
  28 (assert (eq *current-thread*
  29             (find (thread-name *current-thread*) (list-all-threads)
  30                   :key #'thread-name :test #'equal)))
  31
  32 (assert (thread-alive-p *current-thread*))
  33
  34 (let ((a 0))
  35   (interrupt-thread *current-thread* (lambda () (setq a 1)))
  36   (assert (eql a 1)))
  37
  38 (let ((spinlock (make-spinlock)))
  39   (with-spinlock (spinlock)))
  40
  41 (let ((mutex (make-mutex)))
  42   (with-mutex (mutex)
  43     mutex))
  44
  45 (sb-alien:define-alien-routine "check_deferrables_blocked_or_lose"
  46     void
  47   (where sb-alien:unsigned-long))
  48 (sb-alien:define-alien-routine "check_deferrables_unblocked_or_lose"
  49     void
  50   (where sb-alien:unsigned-long))
  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:quit :unix-status 104)
  72
  73 (with-test (:name (:interrupt-thread :deferrables-unblocked-by-spinlock))
  74   (let ((spinlock (sb-thread::make-spinlock))
  75         (thread (sb-thread:make-thread (lambda ()
  76                                          (loop (sleep 1))))))
  77     (sb-thread::get-spinlock spinlock)
  78     (sb-thread:interrupt-thread thread
  79                                 (lambda ()
  80                                   (check-deferrables-blocked-or-lose 0)
  81                                   (sb-thread::get-spinlock spinlock)
  82                                   (check-deferrables-unblocked-or-lose 0)
  83                                   (sb-ext:quit)))
  84     (sleep 1)
  85     (sb-thread::release-spinlock spinlock)))
  86
  87 ;;; compare-and-swap
  88
  89 (defmacro defincf (name accessor &rest args)
  90   `(defun ,name (x)
  91      (let* ((old (,accessor x ,@args))
  92          (new (1+ old)))
  93     (loop until (eq old (sb-ext:compare-and-swap (,accessor x ,@args) old new))
  94        do (setf old (,accessor x ,@args)
  95                 new (1+ old)))
  96     new)))
  97
  98 (defstruct cas-struct (slot 0))
  99
 100 (defincf incf-car car)
 101 (defincf incf-cdr cdr)
 102 (defincf incf-slot cas-struct-slot)
 103 (defincf incf-symbol-value symbol-value)
 104 (defincf incf-svref/1 svref 1)
 105 (defincf incf-svref/0 svref 0)
 106
 107 (defmacro def-test-cas (name init incf op)
 108   `(progn
 109      (defun ,name (n)
 110        (declare (fixnum n))
 111        (let* ((x ,init)
 112               (run nil)
 113               (threads
 114                (loop repeat 10
 115                      collect (sb-thread:make-thread
 116                               (lambda ()
 117                                 (loop until run
 118                                    do (sb-thread:thread-yield))
 119                                 (loop repeat n do (,incf x)))))))
 120          (setf run t)
 121          (dolist (th threads)
 122            (sb-thread:join-thread th))
 123          (assert (= (,op x) (* 10 n)))))
 124      (,name 200000)))
 125
 126 (def-test-cas test-cas-car (cons 0 nil) incf-car car)
 127 (def-test-cas test-cas-cdr (cons nil 0) incf-cdr cdr)
 128 (def-test-cas test-cas-slot (make-cas-struct) incf-slot cas-struct-slot)
 129 (def-test-cas test-cas-value (let ((x '.x.))
 130                                (set x 0)
 131                                x)
 132   incf-symbol-value symbol-value)
 133 (def-test-cas test-cas-svref/0 (vector 0 nil) incf-svref/0 (lambda (x)
 134                                                              (svref x 0)))
 135 (def-test-cas test-cas-svref/1 (vector nil 0) incf-svref/1 (lambda (x)
 136                                                              (svref x 1)))
 137 (format t "~&compare-and-swap tests done~%")
 138
 139 (let ((old-threads (list-all-threads))
 140       (thread (make-thread (lambda ()
 141                              (assert (find *current-thread* *all-threads*))
 142                              (sleep 2))))
 143       (new-threads (list-all-threads)))
 144   (assert (thread-alive-p thread))
 145   (assert (eq thread (first new-threads)))
 146   (assert (= (1+ (length old-threads)) (length new-threads)))
 147   (sleep 3)
 148   (assert (not (thread-alive-p thread))))
 149
 150 (with-test (:name '(:join-thread :nlx :default))
 151   (let ((sym (gensym)))
 152     (assert (eq sym (join-thread (make-thread (lambda () (sb-ext:quit)))
 153                                  :default sym)))))
 154
 155 (with-test (:name '(:join-thread :nlx :error))
 156   (raises-error? (join-thread (make-thread (lambda () (sb-ext:quit))))
 157                  join-thread-error))
 158
 159 (with-test (:name '(:join-thread :multiple-values))
 160   (assert (equal '(1 2 3)
 161                  (multiple-value-list
 162                   (join-thread (make-thread (lambda () (values 1 2 3))))))))
 163
 164 ;;; We had appalling scaling properties for a while.  Make sure they
 165 ;;; don't reappear.
 166 (defun scaling-test (function &optional (nthreads 5))
 167   "Execute FUNCTION with NTHREADS lurking to slow it down."
 168   (let ((queue (sb-thread:make-waitqueue))
 169         (mutex (sb-thread:make-mutex)))
 170     ;; Start NTHREADS idle threads.
 171     (dotimes (i nthreads)
 172       (sb-thread:make-thread (lambda ()
 173                                (with-mutex (mutex)
 174                                  (sb-thread:condition-wait queue mutex))
 175                                (sb-ext:quit))))
 176     (let ((start-time (get-internal-run-time)))
 177       (funcall function)
 178       (prog1 (- (get-internal-run-time) start-time)
 179         (sb-thread:condition-broadcast queue)))))
 180 (defun fact (n)
 181   "A function that does work with the CPU."
 182   (if (zerop n) 1 (* n (fact (1- n)))))
 183 (let ((work (lambda () (fact 15000))))
 184   (let ((zero (scaling-test work 0))
 185         (four (scaling-test work 4)))
 186     ;; a slightly weak assertion, but good enough for starters.
 187     (assert (< four (* 1.5 zero)))))
 188
 189 ;;; For one of the interupt-thread tests, we want a foreign function
 190 ;;; that does not make syscalls
 191
 192 (with-open-file (o "threads-foreign.c" :direction :output :if-exists :supersede)
 193   (format o "void loop_forever() { while(1) ; }~%"))
 194 (sb-ext:run-program
 195  #-sunos "cc" #+sunos "gcc"
 196  (or #+(or linux freebsd sunos) '(#+x86-64 "-fPIC"
 197                                   "-shared" "-o" "threads-foreign.so" "threads-foreign.c")
 198      #+darwin '(#+x86-64 "-arch" #+x86-64 "x86_64"
 199                 "-dynamiclib" "-o" "threads-foreign.so" "threads-foreign.c")
 200      (error "Missing shared library compilation options for this platform"))
 201  :search t)
 202 (sb-alien:load-shared-object (truename "threads-foreign.so"))
 203 (sb-alien:define-alien-routine loop-forever sb-alien:void)
 204 (delete-file "threads-foreign.c")
 205
 206 ;;; elementary "can we get a lock and release it again"
 207 (let ((l (make-mutex :name "foo"))
 208       (p *current-thread*))
 209   (assert (eql (mutex-value l) nil) nil "1")
 210   (sb-thread:get-mutex l)
 211   (assert (eql (mutex-value l) p) nil "3")
 212   (sb-thread:release-mutex l)
 213   (assert (eql (mutex-value l) nil) nil "5"))
 214
 215 (labels ((ours-p (value)
 216            (eq *current-thread* value)))
 217   (let ((l (make-mutex :name "rec")))
 218     (assert (eql (mutex-value l) nil) nil "1")
 219     (sb-thread:with-recursive-lock (l)
 220       (assert (ours-p (mutex-value l)) nil "3")
 221       (sb-thread:with-recursive-lock (l)
 222         (assert (ours-p (mutex-value l)) nil "4"))
 223       (assert (ours-p (mutex-value l)) nil "5"))
 224     (assert (eql (mutex-value l) nil) nil "6")))
 225
 226 (labels ((ours-p (value)
 227            (eq *current-thread* value)))
 228   (let ((l (make-spinlock :name "rec")))
 229     (assert (eql (spinlock-value l) nil) nil "1")
 230     (with-recursive-spinlock (l)
 231       (assert (ours-p (spinlock-value l)) nil "3")
 232       (with-recursive-spinlock (l)
 233         (assert (ours-p (spinlock-value l)) nil "4"))
 234       (assert (ours-p (spinlock-value l)) nil "5"))
 235     (assert (eql (spinlock-value l) nil) nil "6")))
 236
 237 (with-test (:name (:mutex :nesting-mutex-and-recursive-lock))
 238   (let ((l (make-mutex :name "a mutex")))
 239     (with-mutex (l)
 240       (with-recursive-lock (l)))))
 241
 242 (with-test (:name (:spinlock :nesting-spinlock-and-recursive-spinlock))
 243   (let ((l (make-spinlock :name "a spinlock")))
 244     (with-spinlock (l)
 245       (with-recursive-spinlock (l)))))
 246
 247 (let ((l (make-spinlock :name "spinlock")))
 248   (assert (eql (spinlock-value l) nil) ((spinlock-value l))
 249           "spinlock not free (1)")
 250   (with-spinlock (l)
 251     (assert (eql (spinlock-value l) *current-thread*) ((spinlock-value l))
 252             "spinlock not taken"))
 253   (assert (eql (spinlock-value l) nil) ((spinlock-value l))
 254           "spinlock not free (2)"))
 255
 256 ;; test that SLEEP actually sleeps for at least the given time, even
 257 ;; if interrupted by another thread exiting/a gc/anything
 258 (let ((start-time (get-universal-time)))
 259   (make-thread (lambda () (sleep 1) (sb-ext:gc :full t)))
 260   (sleep 5)
 261   (assert (>= (get-universal-time) (+ 5 start-time))))
 262
 263
 264 (let ((queue (make-waitqueue :name "queue"))
 265       (lock (make-mutex :name "lock"))
 266       (n 0))
 267   (labels ((in-new-thread ()
 268              (with-mutex (lock)
 269                (assert (eql (mutex-value lock) *current-thread*))
 270                (format t "~A got mutex~%" *current-thread*)
 271                ;; now drop it and sleep
 272                (condition-wait queue lock)
 273                ;; after waking we should have the lock again
 274                (assert (eql (mutex-value lock) *current-thread*))
 275                (assert (eql n 1))
 276                (decf n))))
 277     (make-thread #'in-new-thread)
 278     (sleep 2)                           ; give it  a chance to start
 279     ;; check the lock is free while it's asleep
 280     (format t "parent thread ~A~%" *current-thread*)
 281     (assert (eql (mutex-value lock) nil))
 282     (with-mutex (lock)
 283       (incf n)
 284       (condition-notify queue))
 285     (sleep 1)))
 286
 287 (let ((queue (make-waitqueue :name "queue"))
 288       (lock (make-mutex :name "lock")))
 289   (labels ((ours-p (value)
 290              (eq *current-thread* value))
 291            (in-new-thread ()
 292              (with-recursive-lock (lock)
 293                (assert (ours-p (mutex-value lock)))
 294                (format t "~A got mutex~%" (mutex-value lock))
 295                ;; now drop it and sleep
 296                (condition-wait queue lock)
 297                ;; after waking we should have the lock again
 298                (format t "woken, ~A got mutex~%" (mutex-value lock))
 299                (assert (ours-p (mutex-value lock))))))
 300     (make-thread #'in-new-thread)
 301     (sleep 2)                           ; give it  a chance to start
 302     ;; check the lock is free while it's asleep
 303     (format t "parent thread ~A~%" *current-thread*)
 304     (assert (eql (mutex-value lock) nil))
 305     (with-recursive-lock (lock)
 306       (condition-notify queue))
 307     (sleep 1)))
 308
 309 (let ((mutex (make-mutex :name "contended")))
 310   (labels ((run ()
 311              (let ((me *current-thread*))
 312                (dotimes (i 100)
 313                  (with-mutex (mutex)
 314                    (sleep .03)
 315                    (assert (eql (mutex-value mutex) me)))
 316                  (assert (not (eql (mutex-value mutex) me))))
 317                (format t "done ~A~%" *current-thread*))))
 318     (let ((kid1 (make-thread #'run))
 319           (kid2 (make-thread #'run)))
 320       (format t "contention ~A ~A~%" kid1 kid2)
 321       (wait-for-threads (list kid1 kid2)))))
 322
 323 ;;; semaphores
 324
 325 (defmacro raises-timeout-p (&body body)
 326   `(handler-case (progn (progn ,@body) nil)
 327     (sb-ext:timeout () t)))
 328
 329 (with-test (:name (:semaphore :wait-forever))
 330   (let ((sem (make-semaphore :count 0)))
 331     (assert (raises-timeout-p
 332               (sb-ext:with-timeout 0.1
 333                 (wait-on-semaphore sem))))))
 334
 335 (with-test (:name (:semaphore :initial-count))
 336   (let ((sem (make-semaphore :count 1)))
 337     (sb-ext:with-timeout 0.1
 338       (wait-on-semaphore sem))))
 339
 340 (with-test (:name (:semaphore :wait-then-signal))
 341   (let ((sem (make-semaphore))
 342         (signalled-p nil))
 343     (make-thread (lambda ()
 344                    (sleep 0.1)
 345                    (setq signalled-p t)
 346                    (signal-semaphore sem)))
 347     (wait-on-semaphore sem)
 348     (assert signalled-p)))
 349
 350 (with-test (:name (:semaphore :signal-then-wait))
 351   (let ((sem (make-semaphore))
 352         (signalled-p nil))
 353     (make-thread (lambda ()
 354                    (signal-semaphore sem)
 355                    (setq signalled-p t)))
 356     (loop until signalled-p)
 357     (wait-on-semaphore sem)
 358     (assert signalled-p)))
 359
 360 (with-test (:name (:semaphore :multiple-signals))
 361   (let* ((sem (make-semaphore :count 5))
 362          (threads (loop repeat 20
 363                         collect (make-thread (lambda ()
 364                                                (wait-on-semaphore sem))))))
 365     (flet ((count-live-threads ()
 366              (count-if #'thread-alive-p threads)))
 367       (sleep 0.5)
 368       (assert (= 15 (count-live-threads)))
 369       (signal-semaphore sem 10)
 370       (sleep 0.5)
 371       (assert (= 5 (count-live-threads)))
 372       (signal-semaphore sem 3)
 373       (sleep 0.5)
 374       (assert (= 2 (count-live-threads)))
 375       (signal-semaphore sem 4)
 376       (sleep 0.5)
 377       (assert (= 0 (count-live-threads))))))
 378
 379 (format t "~&semaphore tests done~%")
 380
 381 (defun test-interrupt (function-to-interrupt &optional quit-p)
 382   (let ((child  (make-thread function-to-interrupt)))
 383     ;;(format t "gdb ./src/runtime/sbcl ~A~%attach ~A~%" child child)
 384     (sleep 2)
 385     (format t "interrupting child ~A~%" child)
 386     (interrupt-thread child
 387                       (lambda ()
 388                         (format t "child pid ~A~%" *current-thread*)
 389                         (when quit-p (sb-ext:quit))))
 390     (sleep 1)
 391     child))
 392
 393 ;; separate tests for (a) interrupting Lisp code, (b) C code, (c) a syscall,
 394 ;; (d) waiting on a lock, (e) some code which we hope is likely to be
 395 ;; in pseudo-atomic
 396
 397 (let ((child (test-interrupt (lambda () (loop)))))  (terminate-thread child))
 398
 399 (test-interrupt #'loop-forever :quit)
 400
 401 (let ((child (test-interrupt (lambda () (loop (sleep 2000))))))
 402   (terminate-thread child)
 403   (wait-for-threads (list child)))
 404
 405 (let ((lock (make-mutex :name "loctite"))
 406       child)
 407   (with-mutex (lock)
 408     (setf child (test-interrupt
 409                  (lambda ()
 410                    (with-mutex (lock)
 411                      (assert (eql (mutex-value lock) *current-thread*)))
 412                    (assert (not (eql (mutex-value lock) *current-thread*)))
 413                    (sleep 10))))
 414     ;;hold onto lock for long enough that child can't get it immediately
 415     (sleep 5)
 416     (interrupt-thread child (lambda () (format t "l ~A~%" (mutex-value lock))))
 417     (format t "parent releasing lock~%"))
 418   (terminate-thread child)
 419   (wait-for-threads (list child)))
 420
 421 (format t "~&locking test done~%")
 422
 423 (defun alloc-stuff () (copy-list '(1 2 3 4 5)))
 424
 425 (progn
 426   (let ((thread (sb-thread:make-thread (lambda () (loop (alloc-stuff))))))
 427     (let ((killers
 428            (loop repeat 4 collect
 429                  (sb-thread:make-thread
 430                   (lambda ()
 431                     (loop repeat 25 do
 432                           (sleep (random 0.1d0))
 433                           (princ ".")
 434                           (force-output)
 435                           (sb-thread:interrupt-thread thread (lambda ()))))))))
 436       (wait-for-threads killers)
 437       (sb-thread:terminate-thread thread)
 438       (wait-for-threads (list thread))))
 439   (sb-ext:gc :full t))
 440
 441 (format t "~&multi interrupt test done~%")
 442
 443 (let ((c (make-thread (lambda () (loop (alloc-stuff))))))
 444   ;; NB this only works on x86: other ports don't have a symbol for
 445   ;; pseudo-atomic atomicity
 446   (dotimes (i 100)
 447     (sleep (random 0.1d0))
 448     (interrupt-thread c
 449                       (lambda ()
 450                         (princ ".") (force-output)
 451                         (assert (thread-alive-p *current-thread*))
 452                         (assert
 453                          (not (logbitp 0 SB-KERNEL:*PSEUDO-ATOMIC-BITS*))))))
 454   (terminate-thread c)
 455   (wait-for-threads (list c)))
 456
 457 (format t "~&interrupt test done~%")
 458
 459 (defparameter *interrupt-count* 0)
 460
 461 (declaim (notinline check-interrupt-count))
 462 (defun check-interrupt-count (i)
 463   (declare (optimize (debug 1) (speed 1)))
 464   ;; This used to lose if eflags were not restored after an interrupt.
 465   (unless (typep i 'fixnum)
 466     (error "!!!!!!!!!!!")))
 467
 468 (let ((c (make-thread
 469           (lambda ()
 470             (handler-bind ((error #'(lambda (cond)
 471                                       (princ cond)
 472                                       (sb-debug:backtrace
 473                                        most-positive-fixnum))))
 474               (loop (check-interrupt-count *interrupt-count*)))))))
 475   (let ((func (lambda ()
 476                 (princ ".")
 477                 (force-output)
 478                 (sb-impl::atomic-incf/symbol *interrupt-count*))))
 479     (setq *interrupt-count* 0)
 480     (dotimes (i 100)
 481       (sleep (random 0.1d0))
 482       (interrupt-thread c func))
 483     (loop until (= *interrupt-count* 100) do (sleep 0.1))
 484     (terminate-thread c)
 485     (wait-for-threads (list c))))
 486
 487 (format t "~&interrupt count test done~%")
 488
 489 (defvar *runningp* nil)
 490
 491 (with-test (:name (:interrupt-thread :no-nesting))
 492   (let ((thread (sb-thread:make-thread
 493                  (lambda ()
 494                    (catch 'xxx
 495                      (loop))))))
 496     (declare (special runningp))
 497     (sleep 0.2)
 498     (sb-thread:interrupt-thread thread
 499                                 (lambda ()
 500                                     (let ((*runningp* t))
 501                                       (sleep 1))))
 502     (sleep 0.2)
 503     (sb-thread:interrupt-thread thread
 504                                 (lambda ()
 505                                   (throw 'xxx *runningp*)))
 506     (assert (not (sb-thread:join-thread thread)))))
 507
 508 (with-test (:name (:interrupt-thread :nesting))
 509   (let ((thread (sb-thread:make-thread
 510                  (lambda ()
 511                    (catch 'xxx
 512                      (loop))))))
 513     (declare (special runningp))
 514     (sleep 0.2)
 515     (sb-thread:interrupt-thread thread
 516                                 (lambda ()
 517                                   (let ((*runningp* t))
 518                                     (sb-sys:with-interrupts
 519                                       (sleep 1)))))
 520     (sleep 0.2)
 521     (sb-thread:interrupt-thread thread
 522                                 (lambda ()
 523                                   (throw 'xxx *runningp*)))
 524     (assert (sb-thread:join-thread thread))))
 525
 526 (let (a-done b-done)
 527   (make-thread (lambda ()
 528                  (dotimes (i 100)
 529                    (sb-ext:gc) (princ "\\") (force-output))
 530                  (setf a-done t)))
 531   (make-thread (lambda ()
 532                  (dotimes (i 25)
 533                    (sb-ext:gc :full t)
 534                    (princ "/") (force-output))
 535                  (setf b-done t)))
 536   (loop
 537    (when (and a-done b-done) (return))
 538    (sleep 1)))
 539
 540 (terpri)
 541
 542 (defun waste (&optional (n 100000))
 543   (loop repeat n do (make-string 16384)))
 544
 545 (loop for i below 100 do
 546       (princ "!")
 547       (force-output)
 548       (sb-thread:make-thread
 549        #'(lambda ()
 550            (waste)))
 551       (waste)
 552       (sb-ext:gc))
 553
 554 (terpri)
 555
 556 (defparameter *aaa* nil)
 557 (loop for i below 100 do
 558       (princ "!")
 559       (force-output)
 560       (sb-thread:make-thread
 561        #'(lambda ()
 562            (let ((*aaa* (waste)))
 563              (waste))))
 564       (let ((*aaa* (waste)))
 565         (waste))
 566       (sb-ext:gc))
 567
 568 (format t "~&gc test done~%")
 569
 570 ;; this used to deadlock on session-lock
 571 (sb-thread:make-thread (lambda () (sb-ext:gc)))
 572 ;; expose thread creation races by exiting quickly
 573 (sb-thread:make-thread (lambda ()))
 574
 575 (defun exercise-syscall (fn reference-errno)
 576   (sb-thread:make-thread
 577    (lambda ()
 578      (loop do
 579           (funcall fn)
 580           (let ((errno (sb-unix::get-errno)))
 581             (sleep (random 0.1d0))
 582             (unless (eql errno reference-errno)
 583               (format t "Got errno: ~A (~A) instead of ~A~%"
 584                       errno
 585                       (sb-unix::strerror)
 586                       reference-errno)
 587               (force-output)
 588               (sb-ext:quit :unix-status 1)))))))
 589
 590 ;; (nanosleep -1 0) does not fail on FreeBSD
 591 (let* (#-freebsd
 592        (nanosleep-errno (progn
 593                           (sb-unix:nanosleep -1 0)
 594                           (sb-unix::get-errno)))
 595        (open-errno (progn
 596                      (open "no-such-file"
 597                            :if-does-not-exist nil)
 598                      (sb-unix::get-errno)))
 599        (threads
 600         (list
 601          #-freebsd
 602          (exercise-syscall (lambda () (sb-unix:nanosleep -1 0)) nanosleep-errno)
 603          (exercise-syscall (lambda () (open "no-such-file"
 604                                             :if-does-not-exist nil))
 605                            open-errno)
 606          (sb-thread:make-thread (lambda () (loop (sb-ext:gc) (sleep 1)))))))
 607   (sleep 10)
 608   (princ "terminating threads")
 609   (dolist (thread threads)
 610     (sb-thread:terminate-thread thread)))
 611
 612 (format t "~&errno test done~%")
 613
 614 (loop repeat 100 do
 615       (let ((thread (sb-thread:make-thread (lambda () (sleep 0.1)))))
 616         (sb-thread:interrupt-thread
 617          thread
 618          (lambda ()
 619            (assert (find-restart 'sb-thread:terminate-thread))))))
 620
 621 (sb-ext:gc :full t)
 622
 623 (format t "~&thread startup sigmask test done~%")
 624
 625 ;; FIXME: What is this supposed to test?
 626 (sb-debug::enable-debugger)
 627 (let* ((main-thread *current-thread*)
 628        (interruptor-thread
 629         (make-thread (lambda ()
 630                        (sleep 2)
 631                        (interrupt-thread main-thread
 632                                          (lambda ()
 633                                            (with-interrupts
 634                                              (break))))
 635                        (sleep 2)
 636                        (interrupt-thread main-thread #'continue))
 637                      :name "interruptor")))
 638   (with-session-lock (*session*)
 639     (sleep 3))
 640   (loop while (thread-alive-p interruptor-thread)))
 641
 642 (format t "~&session lock test done~%")
 643
 644 (loop repeat 20 do
 645       (wait-for-threads
 646        (loop for i below 100 collect
 647              (sb-thread:make-thread (lambda ())))))
 648
 649 (format t "~&creation test done~%")
 650
 651 ;; interrupt handlers are per-thread with pthreads, make sure the
 652 ;; handler installed in one thread is global
 653 (sb-thread:make-thread
 654  (lambda ()
 655    (sb-ext:run-program "sleep" '("1") :search t :wait nil)))
 656
 657 ;;;; Binding stack safety
 658
 659 (defparameter *x* nil)
 660 (defparameter *n-gcs-requested* 0)
 661 (defparameter *n-gcs-done* 0)
 662
 663 (let ((counter 0))
 664   (defun make-something-big ()
 665     (let ((x (make-string 32000)))
 666       (incf counter)
 667       (let ((counter counter))
 668         (sb-ext:finalize x (lambda () (format t " ~S" counter)
 669                                    (force-output)))))))
 670
 671 (defmacro wait-for-gc ()
 672   `(progn
 673      (incf *n-gcs-requested*)
 674      (loop while (< *n-gcs-done* *n-gcs-requested*))))
 675
 676 (defun send-gc ()
 677   (loop until (< *n-gcs-done* *n-gcs-requested*))
 678   (format t "G")
 679   (force-output)
 680   (sb-ext:gc)
 681   (incf *n-gcs-done*))
 682
 683 (defun exercise-binding ()
 684   (loop
 685    (let ((*x* (make-something-big)))
 686      (let ((*x* 42))
 687        ;; at this point the binding stack looks like this:
 688        ;; NO-TLS-VALUE-MARKER, *x*, SOMETHING, *x*
 689        t))
 690    (wait-for-gc)
 691    ;; sig_stop_for_gc_handler binds FREE_INTERRUPT_CONTEXT_INDEX. By
 692    ;; now SOMETHING is gc'ed and the binding stack looks like this: 0,
 693    ;; 0, SOMETHING, 0 (because the symbol slots are zeroed on
 694    ;; unbinding but values are not).
 695    (let ((*x* nil))
 696      ;; bump bsp as if a BIND had just started
 697      (incf sb-vm::*binding-stack-pointer* 2)
 698      (wait-for-gc)
 699      (decf sb-vm::*binding-stack-pointer* 2))))
 700
 701 (with-test (:name (:binding-stack-gc-safety))
 702   (let (threads)
 703     (unwind-protect
 704          (progn
 705            (push (sb-thread:make-thread #'exercise-binding) threads)
 706            (push (sb-thread:make-thread (lambda ()
 707                                           (loop
 708                                            (sleep 0.1)
 709                                            (send-gc))))
 710                  threads)
 711            (sleep 4))
 712       (mapc #'sb-thread:terminate-thread threads))))
 713
 714 (format t "~&binding test done~%")
 715
 716 ;;; HASH TABLES
 717
 718 (defvar *errors* nil)
 719
 720 (defun oops (e)
 721   (setf *errors* e)
 722   (format t "~&oops: ~A in ~S~%" e *current-thread*)
 723   (sb-debug:backtrace)
 724   (catch 'done))
 725
 726 (with-test (:name (:unsynchronized-hash-table))
 727   ;; We expect a (probable) error here: parellel readers and writers
 728   ;; on a hash-table are not expected to work -- but we also don't
 729   ;; expect this to corrupt the image.
 730   (let* ((hash (make-hash-table))
 731          (*errors* nil)
 732          (threads (list (sb-thread:make-thread
 733                          (lambda ()
 734                            (catch 'done
 735                              (handler-bind ((serious-condition 'oops))
 736                                (loop
 737                                  ;;(princ "1") (force-output)
 738                                  (setf (gethash (random 100) hash) 'h)))))
 739                          :name "writer")
 740                         (sb-thread:make-thread
 741                          (lambda ()
 742                            (catch 'done
 743                              (handler-bind ((serious-condition 'oops))
 744                                (loop
 745                                  ;;(princ "2") (force-output)
 746                                  (remhash (random 100) hash)))))
 747                          :name "reader")
 748                         (sb-thread:make-thread
 749                          (lambda ()
 750                            (catch 'done
 751                              (handler-bind ((serious-condition 'oops))
 752                                (loop
 753                                  (sleep (random 1.0))
 754                                  (sb-ext:gc :full t)))))
 755                          :name "collector"))))
 756     (unwind-protect
 757          (sleep 10)
 758       (mapc #'sb-thread:terminate-thread threads))))
 759
 760 (format t "~&unsynchronized hash table test done~%")
 761
 762 (with-test (:name (:synchronized-hash-table))
 763   (let* ((hash (make-hash-table :synchronized t))
 764          (*errors* nil)
 765          (threads (list (sb-thread:make-thread
 766                          (lambda ()
 767                            (catch 'done
 768                              (handler-bind ((serious-condition 'oops))
 769                                (loop
 770                                  ;;(princ "1") (force-output)
 771                                  (setf (gethash (random 100) hash) 'h)))))
 772                          :name "writer")
 773                         (sb-thread:make-thread
 774                          (lambda ()
 775                            (catch 'done
 776                              (handler-bind ((serious-condition 'oops))
 777                                (loop
 778                                  ;;(princ "2") (force-output)
 779                                  (remhash (random 100) hash)))))
 780                          :name "reader")
 781                         (sb-thread:make-thread
 782                          (lambda ()
 783                            (catch 'done
 784                              (handler-bind ((serious-condition 'oops))
 785                                (loop
 786                                  (sleep (random 1.0))
 787                                  (sb-ext:gc :full t)))))
 788                          :name "collector"))))
 789     (unwind-protect
 790          (sleep 10)
 791       (mapc #'sb-thread:terminate-thread threads))
 792     (assert (not *errors*))))
 793
 794 (format t "~&synchronized hash table test done~%")
 795
 796 (with-test (:name (:hash-table-parallel-readers))
 797   (let ((hash (make-hash-table))
 798         (*errors* nil))
 799     (loop repeat 50
 800           do (setf (gethash (random 100) hash) 'xxx))
 801     (let ((threads (list (sb-thread:make-thread
 802                           (lambda ()
 803                             (catch 'done
 804                               (handler-bind ((serious-condition 'oops))
 805                                 (loop
 806                                       until (eq t (gethash (random 100) hash))))))
 807                           :name "reader 1")
 808                          (sb-thread:make-thread
 809                           (lambda ()
 810                             (catch 'done
 811                               (handler-bind ((serious-condition 'oops))
 812                                 (loop
 813                                       until (eq t (gethash (random 100) hash))))))
 814                           :name "reader 2")
 815                          (sb-thread:make-thread
 816                           (lambda ()
 817                             (catch 'done
 818                               (handler-bind ((serious-condition 'oops))
 819                                 (loop
 820                                       until (eq t (gethash (random 100) hash))))))
 821                           :name "reader 3")
 822                          (sb-thread:make-thread
 823                           (lambda ()
 824                             (catch 'done
 825                               (handler-bind ((serious-condition 'oops))
 826                                (loop
 827                                  (sleep (random 1.0))
 828                                  (sb-ext:gc :full t)))))
 829                           :name "collector"))))
 830       (unwind-protect
 831            (sleep 10)
 832         (mapc #'sb-thread:terminate-thread threads))
 833       (assert (not *errors*)))))
 834
 835 (format t "~&multiple reader hash table test done~%")
 836
 837 (with-test (:name (:hash-table-single-accessor-parallel-gc))
 838   (let ((hash (make-hash-table))
 839         (*errors* nil))
 840     (let ((threads (list (sb-thread:make-thread
 841                           (lambda ()
 842                             (handler-bind ((serious-condition 'oops))
 843                               (loop
 844                                 (let ((n (random 100)))
 845                                   (if (gethash n hash)
 846                                       (remhash n hash)
 847                                       (setf (gethash n hash) 'h))))))
 848                           :name "accessor")
 849                          (sb-thread:make-thread
 850                           (lambda ()
 851                             (handler-bind ((serious-condition 'oops))
 852                               (loop
 853                                 (sleep (random 1.0))
 854                                 (sb-ext:gc :full t))))
 855                           :name "collector"))))
 856       (unwind-protect
 857            (sleep 10)
 858         (mapc #'sb-thread:terminate-thread threads))
 859       (assert (not *errors*)))))
 860
 861 (format t "~&single accessor hash table test~%")
 862
 863 #|  ;; a cll post from eric marsden
 864 | (defun crash ()
 865 |   (setq *debugger-hook*
 866 |         (lambda (condition old-debugger-hook)
 867 |           (debug:backtrace 10)
 868 |           (unix:unix-exit 2)))
 869 |   #+live-dangerously
 870 |   (mp::start-sigalrm-yield)
 871 |   (flet ((roomy () (loop (with-output-to-string (*standard-output*) (room)))))
 872 |     (mp:make-process #'roomy)
 873 |     (mp:make-process #'roomy)))
 874 |#
 875
 876 ;;; KLUDGE: No deadlines while waiting on lutex-based condition variables. This test
 877 ;;; would just hang.
 878 #-sb-lutex
 879 (with-test (:name (:condition-variable :wait-multiple))
 880   (loop repeat 40 do
 881         (let ((waitqueue (sb-thread:make-waitqueue :name "Q"))
 882               (mutex (sb-thread:make-mutex :name "M"))
 883               (failedp nil))
 884           (format t ".")
 885           (finish-output t)
 886           (let ((threads (loop repeat 200
 887                                collect
 888                                (sb-thread:make-thread
 889                                 (lambda ()
 890                                   (handler-case
 891                                       (sb-sys:with-deadline (:seconds 0.01)
 892                                         (sb-thread:with-mutex (mutex)
 893                                           (sb-thread:condition-wait waitqueue
 894                                                                     mutex)
 895                                           (setq failedp t)))
 896                                     (sb-sys:deadline-timeout (c)
 897                                       (declare (ignore c)))))))))
 898             (mapc #'sb-thread:join-thread threads)
 899             (assert (not failedp))))))
 900
 901 (with-test (:name (:condition-variable :notify-multiple))
 902   (flet ((tester (notify-fun)
 903            (let ((queue (make-waitqueue :name "queue"))
 904                  (lock (make-mutex :name "lock"))
 905                  (data nil))
 906              (labels ((test (x)
 907                         (loop
 908                            (with-mutex (lock)
 909                              (format t "condition-wait ~a~%" x)
 910                              (force-output)
 911                              (condition-wait queue lock)
 912                              (format t "woke up ~a~%" x)
 913                              (force-output)
 914                              (push x data)))))
 915                (let ((threads (loop for x from 1 to 10
 916                                     collect
 917                                     (let ((x x))
 918                                       (sb-thread:make-thread (lambda ()
 919                                                                (test x)))))))
 920                  (sleep 5)
 921                  (with-mutex (lock)
 922                    (funcall notify-fun queue))
 923                  (sleep 5)
 924                  (mapcar #'terminate-thread threads)
 925                  ;; Check that all threads woke up at least once
 926                  (assert (= (length (remove-duplicates data)) 10)))))))
 927     (tester (lambda (queue)
 928               (format t "~&(condition-notify queue 10)~%")
 929               (force-output)
 930               (condition-notify queue 10)))
 931     (tester (lambda (queue)
 932               (format t "~&(condition-broadcast queue)~%")
 933               (force-output)
 934               (condition-broadcast queue)))))
 935
 936 (format t "waitqueue wakeup tests done~%")
 937
 938 (with-test (:name (:mutex :finalization))
 939   (let ((a nil))
 940     (dotimes (i 500000)
 941       (setf a (make-mutex)))))
 942
 943 (format t "mutex finalization test done~%")
 944
 945 ;;; Check that INFO is thread-safe, at least when we're just doing reads.
 946
 947 (let* ((symbols (loop repeat 10000 collect (gensym)))
 948        (functions (loop for (symbol . rest) on symbols
 949                         for next = (car rest)
 950                         for fun = (let ((next next))
 951                                     (lambda (n)
 952                                       (if next
 953                                           (funcall next (1- n))
 954                                           n)))
 955                         do (setf (symbol-function symbol) fun)
 956                         collect fun)))
 957   (defun infodb-test ()
 958     (funcall (car functions) 9999)))
 959
 960 (with-test (:name (:infodb :read))
 961   (let* ((ok t)
 962          (threads (loop for i from 0 to 10
 963                         collect (sb-thread:make-thread
 964                                  (lambda ()
 965                                    (dotimes (j 100)
 966                                      (write-char #\-)
 967                                      (finish-output)
 968                                      (let ((n (infodb-test)))
 969                                        (unless (zerop n)
 970                                          (setf ok nil)
 971                                          (format t "N != 0 (~A)~%" n)
 972                                          (sb-ext:quit)))))))))
 973     (wait-for-threads threads)
 974     (assert ok)))
 975
 976 (format t "infodb test done~%")
 977
 978 (with-test (:name (:backtrace))
 979   ;; Printing backtraces from several threads at once used to hang the
 980   ;; whole SBCL process (discovered by accident due to a timer.impure
 981   ;; test misbehaving). The cause was that packages weren't even
 982   ;; thread-safe for only doing FIND-SYMBOL, and while printing
 983   ;; backtraces a loot of symbol lookups need to be done due to
 984   ;; *PRINT-ESCAPE*.
 985   (let* ((threads (loop repeat 10
 986                         collect (sb-thread:make-thread
 987                                  (lambda ()
 988                                    (dotimes (i 1000)
 989                                      (with-output-to-string (*debug-io*)
 990                                        (sb-debug::backtrace 10))))))))
 991     (wait-for-threads threads)))
 992
 993 (format t "backtrace test done~%")
 994
 995 (format t "~&starting gc deadlock test: WARNING: THIS TEST WILL HANG ON FAILURE!~%")
 996
 997 (with-test (:name (:gc-deadlock))
 998   ;; Prior to 0.9.16.46 thread exit potentially deadlocked the
 999   ;; GC due to *all-threads-lock* and session lock. On earlier
1000   ;; versions and at least on one specific box this test is good enough
1001   ;; to catch that typically well before the 1500th iteration.
1002   (loop
1003      with i = 0
1004      with n = 3000
1005      while (< i n)
1006      do
1007        (incf i)
1008        (when (zerop (mod i 100))
1009          (write-char #\.)
1010          (force-output))
1011        (handler-case
1012            (if (oddp i)
1013                (sb-thread:make-thread
1014                 (lambda ()
1015                   (sleep (random 0.001)))
1016                 :name (list :sleep i))
1017                (sb-thread:make-thread
1018                 (lambda ()
1019                   ;; KLUDGE: what we are doing here is explicit,
1020                   ;; but the same can happen because of a regular
1021                   ;; MAKE-THREAD or LIST-ALL-THREADS, and various
1022                   ;; session functions.
1023                   (sb-thread::with-all-threads-lock
1024                     (sb-thread::with-session-lock (sb-thread::*session*)
1025                       (sb-ext:gc))))
1026                 :name (list :gc i)))
1027          (error (e)
1028            (format t "~%error creating thread ~D: ~A -- backing off for retry~%" i e)
1029            (sleep 0.1)
1030            (incf i)))))
1031
1032 (format t "~&gc deadlock test done~%")
1033 \f
1034 (let ((count (make-array 8 :initial-element 0)))
1035   (defun closure-one ()
1036     (declare (optimize safety))
1037     (values (incf (aref count 0)) (incf (aref count 1))
1038             (incf (aref count 2)) (incf (aref count 3))
1039             (incf (aref count 4)) (incf (aref count 5))
1040             (incf (aref count 6)) (incf (aref count 7))))
1041   (defun no-optimizing-away-closure-one ()
1042     (setf count (make-array 8 :initial-element 0))))
1043
1044 (defstruct box
1045   (count 0))
1046
1047 (let ((one (make-box))
1048       (two (make-box))
1049       (three (make-box)))
1050   (defun closure-two ()
1051     (declare (optimize safety))
1052     (values (incf (box-count one)) (incf (box-count two)) (incf (box-count three))))
1053   (defun no-optimizing-away-closure-two ()
1054     (setf one (make-box)
1055           two (make-box)
1056           three (make-box))))
1057
1058 (with-test (:name (:funcallable-instances))
1059   ;; the funcallable-instance implementation used not to be threadsafe
1060   ;; against setting the funcallable-instance function to a closure
1061   ;; (because the code and lexenv were set separately).
1062   (let ((fun (sb-kernel:%make-funcallable-instance 0))
1063         (condition nil))
1064     (setf (sb-kernel:funcallable-instance-fun fun) #'closure-one)
1065     (flet ((changer ()
1066              (loop (setf (sb-kernel:funcallable-instance-fun fun) #'closure-one)
1067                    (setf (sb-kernel:funcallable-instance-fun fun) #'closure-two)))
1068            (test ()
1069              (handler-case (loop (funcall fun))
1070                (serious-condition (c) (setf condition c)))))
1071       (let ((changer (make-thread #'changer))
1072             (test (make-thread #'test)))
1073         (handler-case
1074             (progn
1075               ;; The two closures above are fairly carefully crafted
1076               ;; so that if given the wrong lexenv they will tend to
1077               ;; do some serious damage, but it is of course difficult
1078               ;; to predict where the various bits and pieces will be
1079               ;; allocated.  Five seconds failed fairly reliably on
1080               ;; both my x86 and x86-64 systems.  -- CSR, 2006-09-27.
1081               (sb-ext:with-timeout 5
1082                 (wait-for-threads (list test)))
1083               (error "~@<test thread got condition:~2I~_~A~@:>" condition))
1084           (sb-ext:timeout ()
1085             (terminate-thread changer)
1086             (terminate-thread test)
1087             (wait-for-threads (list changer test))))))))
1088
1089 (format t "~&funcallable-instance test done~%")
1090
1091 (defun random-type (n)
1092   `(integer ,(random n) ,(+ n (random n))))
1093
1094 (defun subtypep-hash-cache-test ()
1095   (dotimes (i 10000)
1096     (let ((type1 (random-type 500))
1097           (type2 (random-type 500)))
1098       (let ((a (subtypep type1 type2)))
1099         (dotimes (i 100)
1100           (assert (eq (subtypep type1 type2) a))))))
1101   (format t "ok~%")
1102   (force-output))
1103
1104 (with-test (:name '(:hash-cache :subtypep))
1105   (dotimes (i 10)
1106     (sb-thread:make-thread #'subtypep-hash-cache-test)))
1107 (format t "hash-cache tests done~%")
1108
1109 ;;;; BLACK BOX TESTS
1110
1111 (in-package :cl-user)
1112 (use-package :test-util)
1113 (use-package "ASSERTOID")
1114
1115 (format t "parallel defclass test -- WARNING, WILL HANG ON FAILURE!~%")
1116 (with-test (:name :parallel-defclass)
1117   (defclass test-1 () ((a :initform :orig-a)))
1118   (defclass test-2 () ((b :initform :orig-b)))
1119   (defclass test-3 (test-1 test-2) ((c :initform :orig-c)))
1120   (let* ((run t)
1121          (d1 (sb-thread:make-thread (lambda ()
1122                                       (loop while run
1123                                             do (defclass test-1 () ((a :initform :new-a)))
1124                                             (write-char #\1)
1125                                             (force-output)))
1126                                     :name "d1"))
1127          (d2 (sb-thread:make-thread (lambda ()
1128                                       (loop while run
1129                                             do (defclass test-2 () ((b :initform :new-b)))
1130                                                (write-char #\2)
1131                                                (force-output)))
1132                                     :name "d2"))
1133          (d3 (sb-thread:make-thread (lambda ()
1134                                       (loop while run
1135                                             do (defclass test-3 (test-1 test-2) ((c :initform :new-c)))
1136                                                (write-char #\3)
1137                                                (force-output)))
1138                                     :name "d3"))
1139          (i (sb-thread:make-thread (lambda ()
1140                                      (loop while run
1141                                            do (let ((i (make-instance 'test-3)))
1142                                                 (assert (member (slot-value i 'a) '(:orig-a :new-a)))
1143                                                 (assert (member (slot-value i 'b) '(:orig-b :new-b)))
1144                                                 (assert (member (slot-value i 'c) '(:orig-c :new-c))))
1145                                               (write-char #\i)
1146                                               (force-output)))
1147                                    :name "i")))
1148     (format t "~%sleeping!~%")
1149     (sleep 2.0)
1150     (format t "~%stopping!~%")
1151     (setf run nil)
1152     (mapc (lambda (th)
1153             (sb-thread:join-thread th)
1154             (format t "~%joined ~S~%" (sb-thread:thread-name th)))
1155           (list d1 d2 d3 i))))
1156 (format t "parallel defclass test done~%")