X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=tests%2Fthreads.impure.lisp;h=3672c92abc727d4ab7800d1cb627270d6de75e6a;hb=f81f78b9a2a4ec8e2bef6074de121885c6f19e44;hp=8002d5b1007c19cf46c60006b9ec5b6761b5dea3;hpb=2a860441fcd4181c0a511094397fdc6b6511b280;p=sbcl.git

diff --git a/tests/threads.impure.lisp b/tests/threads.impure.lisp
index 8002d5b..3672c92 100644
--- a/tests/threads.impure.lisp
+++ b/tests/threads.impure.lisp
@@ -11,12 +11,17 @@
 ;;;; absoluely no warranty. See the COPYING and CREDITS files for
 ;;;; more information.
 
-(in-package "SB-THREAD") ; this is white-box testing, really
+; WHITE-BOX TESTS
 
+(in-package "SB-THREAD")
 (use-package :test-util)
+(use-package "ASSERTOID")
+
+(setf sb-unix::*on-dangerous-select* :error)
 
 (defun wait-for-threads (threads)
-  (loop while (some #'sb-thread:thread-alive-p threads) do (sleep 0.01)))
+  (mapc (lambda (thread) (sb-thread:join-thread thread :default nil)) threads)
+  (assert (not (some #'sb-thread:thread-alive-p threads))))
 
 (assert (eql 1 (length (list-all-threads))))
 
@@ -39,6 +44,58 @@
 
 #-sb-thread (sb-ext:quit :unix-status 104)
 
+;;; compare-and-swap
+
+(defmacro defincf (name accessor &rest args)
+  `(defun ,name (x)
+     (let* ((old (,accessor x ,@args))
+         (new (1+ old)))
+    (loop until (eq old (sb-ext:compare-and-swap (,accessor x ,@args) old new))
+       do (setf old (,accessor x ,@args)
+                new (1+ old)))
+    new)))
+
+(defstruct cas-struct (slot 0))
+
+(defincf incf-car car)
+(defincf incf-cdr cdr)
+(defincf incf-slot cas-struct-slot)
+(defincf incf-symbol-value symbol-value)
+(defincf incf-svref/1 svref 1)
+(defincf incf-svref/0 svref 0)
+
+(defmacro def-test-cas (name init incf op)
+  `(progn
+     (defun ,name (n)
+       (declare (fixnum n))
+       (let* ((x ,init)
+              (run nil)
+              (threads
+               (loop repeat 10
+                     collect (sb-thread:make-thread
+                              (lambda ()
+                                (loop until run
+                                   do (sb-thread:thread-yield))
+                                (loop repeat n do (,incf x)))))))
+         (setf run t)
+         (dolist (th threads)
+           (sb-thread:join-thread th))
+         (assert (= (,op x) (* 10 n)))))
+     (,name 200000)))
+
+(def-test-cas test-cas-car (cons 0 nil) incf-car car)
+(def-test-cas test-cas-cdr (cons nil 0) incf-cdr cdr)
+(def-test-cas test-cas-slot (make-cas-struct) incf-slot cas-struct-slot)
+(def-test-cas test-cas-value (let ((x '.x.))
+                               (set x 0)
+                               x)
+  incf-symbol-value symbol-value)
+(def-test-cas test-cas-svref/0 (vector 0 nil) incf-svref/0 (lambda (x)
+                                                             (svref x 0)))
+(def-test-cas test-cas-svref/1 (vector nil 0) incf-svref/1 (lambda (x)
+                                                             (svref x 1)))
+(format t "~&compare-and-swap tests done~%")
+
 (let ((old-threads (list-all-threads))
       (thread (make-thread (lambda ()
                              (assert (find *current-thread* *all-threads*))
@@ -50,6 +107,19 @@
   (sleep 3)
   (assert (not (thread-alive-p thread))))
 
+(with-test (:name '(:join-thread :nlx :default))
+  (let ((sym (gensym)))
+    (assert (eq sym (join-thread (make-thread (lambda () (sb-ext:quit)))
+                                 :default sym)))))
+
+(with-test (:name '(:join-thread :nlx :error))
+  (raises-error? (join-thread (make-thread (lambda () (sb-ext:quit))))))
+
+(with-test (:name '(:join-thread :multiple-values))
+  (assert (equal '(1 2 3)
+                 (multiple-value-list
+                  (join-thread (make-thread (lambda () (values 1 2 3))))))))
+
 ;;; We had appalling scaling properties for a while.  Make sure they
 ;;; don't reappear.
 (defun scaling-test (function &optional (nthreads 5))
@@ -81,13 +151,16 @@
 (with-open-file (o "threads-foreign.c" :direction :output :if-exists :supersede)
   (format o "void loop_forever() { while(1) ; }~%"))
 (sb-ext:run-program
- "cc"
- (or #+linux '("-shared" "-o" "threads-foreign.so" "threads-foreign.c")
+ #-sunos "cc" #+sunos "gcc"
+ (or #+(or linux freebsd sunos) '(#+x86-64 "-fPIC"
+                                  "-shared" "-o" "threads-foreign.so" "threads-foreign.c")
+     #+darwin '(#+x86-64 "-arch" #+x86-64 "x86_64"
+                "-dynamiclib" "-o" "threads-foreign.so" "threads-foreign.c")
      (error "Missing shared library compilation options for this platform"))
  :search t)
-(sb-alien:load-shared-object "threads-foreign.so")
+(sb-alien:load-shared-object (truename "threads-foreign.so"))
 (sb-alien:define-alien-routine loop-forever sb-alien:void)
-
+(delete-file "threads-foreign.c")
 
 ;;; elementary "can we get a lock and release it again"
 (let ((l (make-mutex :name "foo"))
@@ -109,17 +182,35 @@
       (assert (ours-p (mutex-value l)) nil "5"))
     (assert (eql (mutex-value l) nil) nil "6")))
 
+(labels ((ours-p (value)
+           (eq *current-thread* value)))
+  (let ((l (make-spinlock :name "rec")))
+    (assert (eql (spinlock-value l) nil) nil "1")
+    (with-recursive-spinlock (l)
+      (assert (ours-p (spinlock-value l)) nil "3")
+      (with-recursive-spinlock (l)
+        (assert (ours-p (spinlock-value l)) nil "4"))
+      (assert (ours-p (spinlock-value l)) nil "5"))
+    (assert (eql (spinlock-value l) nil) nil "6")))
+
 (with-test (:name (:mutex :nesting-mutex-and-recursive-lock))
   (let ((l (make-mutex :name "a mutex")))
     (with-mutex (l)
       (with-recursive-lock (l)))))
 
-(let ((l (make-spinlock :name "spinlock"))
-      (p *current-thread*))
-  (assert (eql (spinlock-value l) 0) nil "1")
+(with-test (:name (:spinlock :nesting-spinlock-and-recursive-spinlock))
+  (let ((l (make-spinlock :name "a spinlock")))
+    (with-spinlock (l)
+      (with-recursive-spinlock (l)))))
+
+(let ((l (make-spinlock :name "spinlock")))
+  (assert (eql (spinlock-value l) nil) ((spinlock-value l))
+          "spinlock not free (1)")
   (with-spinlock (l)
-    (assert (eql (spinlock-value l) p) nil "2"))
-  (assert (eql (spinlock-value l) 0) nil "3"))
+    (assert (eql (spinlock-value l) *current-thread*) ((spinlock-value l))
+            "spinlock not taken"))
+  (assert (eql (spinlock-value l) nil) ((spinlock-value l))
+          "spinlock not free (2)"))
 
 ;; test that SLEEP actually sleeps for at least the given time, even
 ;; if interrupted by another thread exiting/a gc/anything
@@ -317,7 +408,8 @@
                       (lambda ()
                         (princ ".") (force-output)
                         (assert (thread-alive-p *current-thread*))
-                        (assert (zerop SB-KERNEL:*PSEUDO-ATOMIC-ATOMIC*)))))
+                        (assert
+                         (not (logbitp 0 SB-KERNEL:*PSEUDO-ATOMIC-BITS*))))))
   (terminate-thread c)
   (wait-for-threads (list c)))
 
@@ -417,7 +509,9 @@
               (force-output)
               (sb-ext:quit :unix-status 1)))))))
 
-(let* ((nanosleep-errno (progn
+;; (nanosleep -1 0) does not fail on FreeBSD
+(let* (#-freebsd
+       (nanosleep-errno (progn
                           (sb-unix:nanosleep -1 0)
                           (sb-unix::get-errno)))
        (open-errno (progn
@@ -426,6 +520,7 @@
                      (sb-unix::get-errno)))
        (threads
         (list
+         #-freebsd
          (exercise-syscall (lambda () (sb-unix:nanosleep -1 0)) nanosleep-errno)
          (exercise-syscall (lambda () (open "no-such-file"
                                             :if-does-not-exist nil))
@@ -449,6 +544,7 @@
 
 (format t "~&thread startup sigmask test done~%")
 
+;; FIXME: What is this supposed to test?
 (sb-debug::enable-debugger)
 (let* ((main-thread *current-thread*)
        (interruptor-thread
@@ -456,7 +552,8 @@
                        (sleep 2)
                        (interrupt-thread main-thread #'break)
                        (sleep 2)
-                       (interrupt-thread main-thread #'continue)))))
+                       (interrupt-thread main-thread #'continue))
+                     :name "interruptor")))
   (with-session-lock (*session*)
     (sleep 3))
   (loop while (thread-alive-p interruptor-thread)))
@@ -476,20 +573,211 @@
  (lambda ()
    (sb-ext:run-program "sleep" '("1") :search t :wait nil)))
 
-(with-test (:name (:thread-start :dynamic-values-and-gc))
-  (let ((gc-thread (sb-thread:make-thread (lambda ()
-                                            (loop (sleep (random 0.2))
-                                                  (sb-ext:gc :full t))))))
-    (wait-for-threads
-     (loop for i below 3000
-           when (zerop (mod i 30))
-           do (princ ".")
-           collect
-           (let ((*x* (lambda ())))
-             (declare (special *x*))
-             (sb-thread:make-thread (lambda () (functionp *x*))))))
-    (sb-thread:terminate-thread gc-thread)
-    (terpri)))
+;;;; Binding stack safety
+
+(defparameter *x* nil)
+(defparameter *n-gcs-requested* 0)
+(defparameter *n-gcs-done* 0)
+
+(let ((counter 0))
+  (defun make-something-big ()
+    (let ((x (make-string 32000)))
+      (incf counter)
+      (let ((counter counter))
+        (sb-ext:finalize x (lambda () (format t " ~S" counter)
+                                   (force-output)))))))
+
+(defmacro wait-for-gc ()
+  `(progn
+     (incf *n-gcs-requested*)
+     (loop while (< *n-gcs-done* *n-gcs-requested*))))
+
+(defun send-gc ()
+  (loop until (< *n-gcs-done* *n-gcs-requested*))
+  (format t "G")
+  (force-output)
+  (sb-ext:gc)
+  (incf *n-gcs-done*))
+
+(defun exercise-binding ()
+  (loop
+   (let ((*x* (make-something-big)))
+     (let ((*x* 42))
+       ;; at this point the binding stack looks like this:
+       ;; NO-TLS-VALUE-MARKER, *x*, SOMETHING, *x*
+       t))
+   (wait-for-gc)
+   ;; sig_stop_for_gc_handler binds FREE_INTERRUPT_CONTEXT_INDEX. By
+   ;; now SOMETHING is gc'ed and the binding stack looks like this: 0,
+   ;; 0, SOMETHING, 0 (because the symbol slots are zeroed on
+   ;; unbinding but values are not).
+   (let ((*x* nil))
+     ;; bump bsp as if a BIND had just started
+     (incf sb-vm::*binding-stack-pointer* 2)
+     (wait-for-gc)
+     (decf sb-vm::*binding-stack-pointer* 2))))
+
+(with-test (:name (:binding-stack-gc-safety))
+  (let (threads)
+    (unwind-protect
+         (progn
+           (push (sb-thread:make-thread #'exercise-binding) threads)
+           (push (sb-thread:make-thread (lambda ()
+                                          (loop
+                                           (sleep 0.1)
+                                           (send-gc))))
+                 threads)
+           (sleep 4))
+      (mapc #'sb-thread:terminate-thread threads))))
+
+(format t "~&binding test done~%")
+
+;;; HASH TABLES
+
+(defvar *errors* nil)
+
+(defun oops (e)
+  (setf *errors* e)
+  (format t "~&oops: ~A in ~S~%" e *current-thread*)
+  (sb-debug:backtrace)
+  (catch 'done))
+
+(with-test (:name (:unsynchronized-hash-table))
+  ;; We expect a (probable) error here: parellel readers and writers
+  ;; on a hash-table are not expected to work -- but we also don't
+  ;; expect this to corrupt the image.
+  (let* ((hash (make-hash-table))
+         (*errors* nil)
+         (threads (list (sb-thread:make-thread
+                         (lambda ()
+                           (catch 'done
+                             (handler-bind ((serious-condition 'oops))
+                               (loop
+                                 ;;(princ "1") (force-output)
+                                 (setf (gethash (random 100) hash) 'h)))))
+                         :name "writer")
+                        (sb-thread:make-thread
+                         (lambda ()
+                           (catch 'done
+                             (handler-bind ((serious-condition 'oops))
+                               (loop
+                                 ;;(princ "2") (force-output)
+                                 (remhash (random 100) hash)))))
+                         :name "reader")
+                        (sb-thread:make-thread
+                         (lambda ()
+                           (catch 'done
+                             (handler-bind ((serious-condition 'oops))
+                               (loop
+                                 (sleep (random 1.0))
+                                 (sb-ext:gc :full t)))))
+                         :name "collector"))))
+    (unwind-protect
+         (sleep 10)
+      (mapc #'sb-thread:terminate-thread threads))))
+
+(format t "~&unsynchronized hash table test done~%")
+
+(with-test (:name (:synchronized-hash-table))
+  (let* ((hash (make-hash-table :synchronized t))
+         (*errors* nil)
+         (threads (list (sb-thread:make-thread
+                         (lambda ()
+                           (catch 'done
+                             (handler-bind ((serious-condition 'oops))
+                               (loop
+                                 ;;(princ "1") (force-output)
+                                 (setf (gethash (random 100) hash) 'h)))))
+                         :name "writer")
+                        (sb-thread:make-thread
+                         (lambda ()
+                           (catch 'done
+                             (handler-bind ((serious-condition 'oops))
+                               (loop
+                                 ;;(princ "2") (force-output)
+                                 (remhash (random 100) hash)))))
+                         :name "reader")
+                        (sb-thread:make-thread
+                         (lambda ()
+                           (catch 'done
+                             (handler-bind ((serious-condition 'oops))
+                               (loop
+                                 (sleep (random 1.0))
+                                 (sb-ext:gc :full t)))))
+                         :name "collector"))))
+    (unwind-protect
+         (sleep 10)
+      (mapc #'sb-thread:terminate-thread threads))
+    (assert (not *errors*))))
+
+(format t "~&synchronized hash table test done~%")
+
+(with-test (:name (:hash-table-parallel-readers))
+  (let ((hash (make-hash-table))
+        (*errors* nil))
+    (loop repeat 50
+          do (setf (gethash (random 100) hash) 'xxx))
+    (let ((threads (list (sb-thread:make-thread
+                          (lambda ()
+                            (catch 'done
+                              (handler-bind ((serious-condition 'oops))
+                                (loop
+                                      until (eq t (gethash (random 100) hash))))))
+                          :name "reader 1")
+                         (sb-thread:make-thread
+                          (lambda ()
+                            (catch 'done
+                              (handler-bind ((serious-condition 'oops))
+                                (loop
+                                      until (eq t (gethash (random 100) hash))))))
+                          :name "reader 2")
+                         (sb-thread:make-thread
+                          (lambda ()
+                            (catch 'done
+                              (handler-bind ((serious-condition 'oops))
+                                (loop
+                                      until (eq t (gethash (random 100) hash))))))
+                          :name "reader 3")
+                         (sb-thread:make-thread
+                          (lambda ()
+                            (catch 'done
+                              (handler-bind ((serious-condition 'oops))
+                               (loop
+                                 (sleep (random 1.0))
+                                 (sb-ext:gc :full t)))))
+                          :name "collector"))))
+      (unwind-protect
+           (sleep 10)
+        (mapc #'sb-thread:terminate-thread threads))
+      (assert (not *errors*)))))
+
+(format t "~&multiple reader hash table test done~%")
+
+(with-test (:name (:hash-table-single-accessor-parallel-gc))
+  (let ((hash (make-hash-table))
+        (*errors* nil))
+    (let ((threads (list (sb-thread:make-thread
+                          (lambda ()
+                            (handler-bind ((serious-condition 'oops))
+                              (loop
+                                (let ((n (random 100)))
+                                  (if (gethash n hash)
+                                      (remhash n hash)
+                                      (setf (gethash n hash) 'h))))))
+                          :name "accessor")
+                         (sb-thread:make-thread
+                          (lambda ()
+                            (handler-bind ((serious-condition 'oops))
+                              (loop
+                                (sleep (random 1.0))
+                                (sb-ext:gc :full t))))
+                          :name "collector"))))
+      (unwind-protect
+           (sleep 10)
+        (mapc #'sb-thread:terminate-thread threads))
+      (assert (not *errors*)))))
+
+(format t "~&single accessor hash table test~%")
 
 #|  ;; a cll post from eric marsden
 | (defun crash ()
@@ -503,3 +791,260 @@
 |     (mp:make-process #'roomy)
 |     (mp:make-process #'roomy)))
 |#
+
+(with-test (:name (:condition-variable :notify-multiple))
+  (flet ((tester (notify-fun)
+           (let ((queue (make-waitqueue :name "queue"))
+                 (lock (make-mutex :name "lock"))
+                 (data nil))
+             (labels ((test (x)
+                        (loop
+                           (with-mutex (lock)
+                             (format t "condition-wait ~a~%" x)
+                             (force-output)
+                             (condition-wait queue lock)
+                             (format t "woke up ~a~%" x)
+                             (force-output)
+                             (push x data)))))
+               (let ((threads (loop for x from 1 to 10
+                                    collect
+                                    (let ((x x))
+                                      (sb-thread:make-thread (lambda ()
+                                                               (test x)))))))
+                 (sleep 5)
+                 (with-mutex (lock)
+                   (funcall notify-fun queue))
+                 (sleep 5)
+                 (mapcar #'terminate-thread threads)
+                 ;; Check that all threads woke up at least once
+                 (assert (= (length (remove-duplicates data)) 10)))))))
+    (tester (lambda (queue)
+              (format t "~&(condition-notify queue 10)~%")
+              (force-output)
+              (condition-notify queue 10)))
+    (tester (lambda (queue)
+              (format t "~&(condition-broadcast queue)~%")
+              (force-output)
+              (condition-broadcast queue)))))
+
+(format t "waitqueue wakeup tests done~%")
+
+(with-test (:name (:mutex :finalization))
+  (let ((a nil))
+    (dotimes (i 500000)
+      (setf a (make-mutex)))))
+
+(format t "mutex finalization test done~%")
+
+;;; Check that INFO is thread-safe, at least when we're just doing reads.
+
+(let* ((symbols (loop repeat 10000 collect (gensym)))
+       (functions (loop for (symbol . rest) on symbols
+                        for next = (car rest)
+                        for fun = (let ((next next))
+                                    (lambda (n)
+                                      (if next
+                                          (funcall next (1- n))
+                                          n)))
+                        do (setf (symbol-function symbol) fun)
+                        collect fun)))
+  (defun infodb-test ()
+    (funcall (car functions) 9999)))
+
+(with-test (:name (:infodb :read))
+  (let* ((ok t)
+         (threads (loop for i from 0 to 10
+                        collect (sb-thread:make-thread
+                                 (lambda ()
+                                   (dotimes (j 100)
+                                     (write-char #\-)
+                                     (finish-output)
+                                     (let ((n (infodb-test)))
+                                       (unless (zerop n)
+                                         (setf ok nil)
+                                         (format t "N != 0 (~A)~%" n)
+                                         (sb-ext:quit)))))))))
+    (wait-for-threads threads)
+    (assert ok)))
+
+(format t "infodb test done~%")
+
+(with-test (:name (:backtrace))
+  ;; Printing backtraces from several threads at once used to hang the
+  ;; whole SBCL process (discovered by accident due to a timer.impure
+  ;; test misbehaving). The cause was that packages weren't even
+  ;; thread-safe for only doing FIND-SYMBOL, and while printing
+  ;; backtraces a loot of symbol lookups need to be done due to
+  ;; *PRINT-ESCAPE*.
+  (let* ((threads (loop repeat 10
+                        collect (sb-thread:make-thread
+                                 (lambda ()
+                                   (dotimes (i 1000)
+                                     (with-output-to-string (*debug-io*)
+                                       (sb-debug::backtrace 10))))))))
+    (wait-for-threads threads)))
+
+(format t "backtrace test done~%")
+
+(format t "~&starting gc deadlock test: WARNING: THIS TEST WILL HANG ON FAILURE!~%")
+
+(with-test (:name (:gc-deadlock))
+  ;; Prior to 0.9.16.46 thread exit potentially deadlocked the
+  ;; GC due to *all-threads-lock* and session lock. On earlier
+  ;; versions and at least on one specific box this test is good enough
+  ;; to catch that typically well before the 1500th iteration.
+  (loop
+     with i = 0
+     with n = 3000
+     while (< i n)
+     do
+       (incf i)
+       (when (zerop (mod i 100))
+         (write-char #\.)
+         (force-output))
+       (handler-case
+           (if (oddp i)
+               (sb-thread:make-thread
+                (lambda ()
+                  (sleep (random 0.001)))
+                :name (list :sleep i))
+               (sb-thread:make-thread
+                (lambda ()
+                  ;; KLUDGE: what we are doing here is explicit,
+                  ;; but the same can happen because of a regular
+                  ;; MAKE-THREAD or LIST-ALL-THREADS, and various
+                  ;; session functions.
+                  (sb-thread::with-all-threads-lock
+                    (sb-thread::with-session-lock (sb-thread::*session*)
+                      (sb-ext:gc))))
+                :name (list :gc i)))
+         (error (e)
+           (format t "~%error creating thread ~D: ~A -- backing off for retry~%" i e)
+           (sleep 0.1)
+           (incf i)))))
+
+(format t "~&gc deadlock test done~%")
+
+(let ((count (make-array 8 :initial-element 0)))
+  (defun closure-one ()
+    (declare (optimize safety))
+    (values (incf (aref count 0)) (incf (aref count 1))
+            (incf (aref count 2)) (incf (aref count 3))
+            (incf (aref count 4)) (incf (aref count 5))
+            (incf (aref count 6)) (incf (aref count 7))))
+  (defun no-optimizing-away-closure-one ()
+    (setf count (make-array 8 :initial-element 0))))
+
+(defstruct box
+  (count 0))
+
+(let ((one (make-box))
+      (two (make-box))
+      (three (make-box)))
+  (defun closure-two ()
+    (declare (optimize safety))
+    (values (incf (box-count one)) (incf (box-count two)) (incf (box-count three))))
+  (defun no-optimizing-away-closure-two ()
+    (setf one (make-box)
+          two (make-box)
+          three (make-box))))
+
+(with-test (:name (:funcallable-instances))
+  ;; the funcallable-instance implementation used not to be threadsafe
+  ;; against setting the funcallable-instance function to a closure
+  ;; (because the code and lexenv were set separately).
+  (let ((fun (sb-kernel:%make-funcallable-instance 0))
+        (condition nil))
+    (setf (sb-kernel:funcallable-instance-fun fun) #'closure-one)
+    (flet ((changer ()
+             (loop (setf (sb-kernel:funcallable-instance-fun fun) #'closure-one)
+                   (setf (sb-kernel:funcallable-instance-fun fun) #'closure-two)))
+           (test ()
+             (handler-case (loop (funcall fun))
+               (serious-condition (c) (setf condition c)))))
+      (let ((changer (make-thread #'changer))
+            (test (make-thread #'test)))
+        (handler-case
+            (progn
+              ;; The two closures above are fairly carefully crafted
+              ;; so that if given the wrong lexenv they will tend to
+              ;; do some serious damage, but it is of course difficult
+              ;; to predict where the various bits and pieces will be
+              ;; allocated.  Five seconds failed fairly reliably on
+              ;; both my x86 and x86-64 systems.  -- CSR, 2006-09-27.
+              (sb-ext:with-timeout 5
+                (wait-for-threads (list test)))
+              (error "~@<test thread got condition:~2I~_~A~@:>" condition))
+          (sb-ext:timeout ()
+            (terminate-thread changer)
+            (terminate-thread test)
+            (wait-for-threads (list changer test))))))))
+
+(format t "~&funcallable-instance test done~%")
+
+(defun random-type (n)
+  `(integer ,(random n) ,(+ n (random n))))
+
+(defun subtypep-hash-cache-test ()
+  (dotimes (i 10000)
+    (let ((type1 (random-type 500))
+          (type2 (random-type 500)))
+      (let ((a (subtypep type1 type2)))
+        (dotimes (i 100)
+          (assert (eq (subtypep type1 type2) a))))))
+  (format t "ok~%")
+  (force-output))
+
+(with-test (:name '(:hash-cache :subtypep))
+  (dotimes (i 10)
+    (sb-thread:make-thread #'subtypep-hash-cache-test)))
+(format t "hash-cache tests done~%")
+
+;;;; BLACK BOX TESTS
+
+(in-package :cl-user)
+(use-package :test-util)
+(use-package "ASSERTOID")
+
+(format t "parallel defclass test -- WARNING, WILL HANG ON FAILURE!~%")
+(with-test (:name :parallel-defclass)
+  (defclass test-1 () ((a :initform :orig-a)))
+  (defclass test-2 () ((b :initform :orig-b)))
+  (defclass test-3 (test-1 test-2) ((c :initform :orig-c)))
+  (let* ((run t)
+         (d1 (sb-thread:make-thread (lambda ()
+                                      (loop while run
+                                            do (defclass test-1 () ((a :initform :new-a)))
+                                            (write-char #\1)
+                                            (force-output)))
+                                    :name "d1"))
+         (d2 (sb-thread:make-thread (lambda ()
+                                      (loop while run
+                                            do (defclass test-2 () ((b :initform :new-b)))
+                                               (write-char #\2)
+                                               (force-output)))
+                                    :name "d2"))
+         (d3 (sb-thread:make-thread (lambda ()
+                                      (loop while run
+                                            do (defclass test-3 (test-1 test-2) ((c :initform :new-c)))
+                                               (write-char #\3)
+                                               (force-output)))
+                                    :name "d3"))
+         (i (sb-thread:make-thread (lambda ()
+                                     (loop while run
+                                           do (let ((i (make-instance 'test-3)))
+                                                (assert (member (slot-value i 'a) '(:orig-a :new-a)))
+                                                (assert (member (slot-value i 'b) '(:orig-b :new-b)))
+                                                (assert (member (slot-value i 'c) '(:orig-c :new-c))))
+                                              (write-char #\i)
+                                              (force-output)))
+                                   :name "i")))
+    (format t "~%sleeping!~%")
+    (sleep 2.0)
+    (format t "~%stopping!~%")
+    (setf run nil)
+    (mapc (lambda (th)
+            (sb-thread:join-thread th)
+            (format t "~%joined ~S~%" (sb-thread:thread-name th)))
+          (list d1 d2 d3 i))))
+(format t "parallel defclass test done~%")