tests/debug.impure.lisp

   1 ;;;; This file is for testing debugging functionality, using
   2 ;;;; test machinery which might have side effects (e.g.
   3 ;;;; executing DEFUN).
   4
   5 ;;;; This software is part of the SBCL system. See the README file for
   6 ;;;; more information.
   7 ;;;;
   8 ;;;; While most of SBCL is derived from the CMU CL system, the test
   9 ;;;; files (like this one) were written from scratch after the fork
  10 ;;;; from CMU CL.
  11 ;;;;
  12 ;;;; This software is in the public domain and is provided with
  13 ;;;; absolutely no warranty. See the COPYING and CREDITS files for
  14 ;;;; more information.
  15
  16 (cl:in-package :cl-user)
  17
  18 ;;; The debugger doesn't have any native knowledge of the interpreter
  19 (when (eq sb-ext:*evaluator-mode* :interpret)
  20   (sb-ext:exit :code 104))
  21
  22 \f
  23 ;;;; Check that we get debug arglists right.
  24
  25 (defvar *p* (namestring *load-truename*))
  26
  27 ;;; FIXME: This should use some get-argslist like functionality that
  28 ;;; we actually export.
  29 ;;;
  30 ;;; Return the debug arglist of the function object FUN as a list, or
  31 ;;; punt with :UNKNOWN.
  32 (defun get-arglist (fun)
  33   (declare (type function fun))
  34   ;; The Lisp-level type FUNCTION can conceal a multitude of sins..
  35   (case (sb-kernel:widetag-of fun)
  36     (#.sb-vm:simple-fun-header-widetag
  37       (sb-kernel:%simple-fun-arglist fun))
  38     (#.sb-vm:closure-header-widetag (get-arglist
  39                                      (sb-kernel:%closure-fun fun)))
  40     ;; In code/describe.lisp, ll. 227 (%describe-fun), we use a scheme
  41     ;; like above, and it seems to work. -- MNA 2001-06-12
  42     ;;
  43     ;; (There might be other cases with arglist info also.
  44     ;; SIMPLE-FUN-HEADER-WIDETAG and CLOSURE-HEADER-WIDETAG just
  45     ;; happen to be the two case that I had my nose rubbed in when
  46     ;; debugging a GC problem caused by applying %SIMPLE-FUN-ARGLIST to
  47     ;; a closure. -- WHN 2001-06-05)
  48     (t
  49      #+sb-eval
  50      (if (typep fun 'sb-eval::interpreted-function)
  51          (sb-eval::interpreted-function-lambda-list fun)
  52          :unknown)
  53      #-sb-eval
  54      :unknown)))
  55
  56 (defun zoop (zeep &key beep)
  57   blurp)
  58 (assert (equal (get-arglist #'zoop) '(zeep &key beep)))
  59
  60 ;;; Check some predefined functions too.
  61 ;;;
  62 ;;; (We don't know exactly what the arguments are, e.g. the first
  63 ;;; argument of PRINT might be SB-IMPL::OBJECT or SB-KERNEL::OBJ or
  64 ;;; whatever. But we do know the general structure that a correct
  65 ;;; answer should have, so we can safely do a lot of checks.)
  66 (with-test (:name :predefined-functions-1)
  67   (destructuring-bind (object-sym &optional-sym stream-sym) (get-arglist #'print)
  68     (assert (symbolp object-sym))
  69     (assert (eql &optional-sym '&optional))
  70     (assert (symbolp stream-sym))))
  71 (with-test (:name :predefined-functions-2)
  72   (destructuring-bind (dest-sym control-sym &rest-sym format-args-sym)
  73       (get-arglist #'format)
  74     (assert (symbolp dest-sym))
  75     (assert (symbolp control-sym))
  76     (assert (eql &rest-sym '&rest))
  77     (assert (symbolp format-args-sym))))
  78
  79 ;;; Check for backtraces generally being correct.  Ensure that the
  80 ;;; actual backtrace finishes (doesn't signal any errors on its own),
  81 ;;; and that it contains the frames we expect, doesn't contain any
  82 ;;; "bogus stack frame"s, and contains the appropriate toplevel call
  83 ;;; and hasn't been cut off anywhere.
  84 (defun verify-backtrace (test-function frame-specs &key (allow-stunted nil))
  85   (labels ((args-equal (want real)
  86              (cond ((eq '&rest (car want))
  87                     t)
  88                    ((endp want)
  89                     (endp real))
  90                    ((or (eq '? (car want)) (equal (car want) (car real)))
  91                     (args-equal (cdr want) (cdr real)))
  92                    (t
  93                     nil))))
  94     (let ((result nil))
  95       (block outer-handler
  96         (handler-bind
  97             ((error (lambda (condition)
  98                       ;; find the part of the backtrace we're interested in
  99                       (let* ((full-backtrace (sb-debug:backtrace-as-list))
 100                              (backtrace (member (caar frame-specs) full-backtrace
 101                                                 :key #'car
 102                                                 :test #'equal)))
 103
 104                         (setf result condition)
 105
 106                         (unless backtrace
 107                           (format t "~&//~S not in backtrace:~%   ~S~%"
 108                                   (caar frame-specs)
 109                                   full-backtrace)
 110                           (setf result nil))
 111                         ;; check that we have all the frames we wanted
 112                         (mapcar
 113                          (lambda (spec frame)
 114                            (unless (or (not spec)
 115                                        (and (equal (car spec) (car frame))
 116                                             (args-equal (cdr spec)
 117                                                         (cdr frame))))
 118                              (print (list :wanted spec :got frame))
 119                              (setf result nil)))
 120                          frame-specs
 121                          backtrace)
 122
 123                         ;; Make sure the backtrace isn't stunted in
 124                         ;; any way.  (Depends on running in the main
 125                         ;; thread.) FIXME: On Windows we get two
 126                         ;; extra foreign frames below regular frames.
 127                         (unless (find '(sb-impl::toplevel-init) backtrace
 128                                       :test #'equal)
 129                           (print (list :backtrace-stunted backtrace))
 130                           (setf result nil))
 131                         (return-from outer-handler)))))
 132           (funcall test-function)))
 133       result)))
 134
 135 (defvar *undefined-function-frame*
 136   ;; bug 353
 137   '("undefined function"))
 138
 139 ;;; Test for "undefined function" (undefined_tramp) working properly.
 140 ;;; Try it with and without tail call elimination, since they can have
 141 ;;; different effects.  (Specifically, if undefined_tramp is incorrect
 142 ;;; a stunted stack can result from the tail call variant.)
 143 (flet ((optimized ()
 144          (declare (optimize (speed 2) (debug 1))) ; tail call elimination
 145          (#:undefined-function 42))
 146        (not-optimized ()
 147          (declare (optimize (speed 1) (debug 2))) ; no tail call elimination
 148          (#:undefined-function 42))
 149        (test (fun)
 150          (declare (optimize (speed 1) (debug 2))) ; no tail call elimination
 151          (funcall fun)))
 152
 153   (with-test (:name (:undefined-function :bug-346)
 154                     ;; Failures on ALPHA, SPARC, MIPS, and probably
 155                     ;; HPPA are due to not having a full and valid
 156                     ;; stack frame for the undefined function frame.
 157                     ;; See PPC undefined_tramp for details.
 158               :fails-on '(or :alpha :sparc :mips
 159                           (and :x86-64 :freebsd)))
 160     (assert (verify-backtrace
 161              (lambda () (test #'optimized))
 162              (list *undefined-function-frame*
 163                    (list `(flet test :in ,*p*) #'optimized)))))
 164
 165   ;; bug 353: This test fails at least most of the time for x86/linux
 166   ;; ca. 0.8.20.16. -- WHN
 167   (with-test (:name (:undefined-function :bug-353))
 168     (assert (verify-backtrace
 169              (lambda () (test #'not-optimized))
 170              (list *undefined-function-frame*
 171                    (list `(flet not-optimized :in ,*p*))
 172                    (list `(flet test :in ,*p*) #'not-optimized))))))
 173
 174 (with-test (:name :backtrace-interrupted-condition-wait
 175             :skipped-on '(not :sb-thread)
 176                   ;; For some unfathomable reason the backtrace becomes
 177                   ;; stunted on Darwin, ending at _sigtramp, when we add
 178                   ;; :TIMEOUT NIL to the frame we expect. If we leave it out,
 179                   ;; the backtrace is fine -- but the test fails. I can only
 180                   ;; boggle right now.
 181             :fails-on '(or (and :x86 :linux) :darwin))
 182   (let ((m (sb-thread:make-mutex))
 183         (q (sb-thread:make-waitqueue)))
 184     (assert (verify-backtrace
 185             (lambda ()
 186               (sb-thread:with-mutex (m)
 187                 (handler-bind ((timeout (lambda (c)
 188                                           (error "foo"))))
 189                   (with-timeout 0.1
 190                     (sb-thread:condition-wait q m)))))
 191             `((sb-thread:condition-wait ,q ,m :timeout nil))))))
 192
 193 ;;; Division by zero was a common error on PPC. It depended on the
 194 ;;; return function either being before INTEGER-/-INTEGER in memory,
 195 ;;; or more than MOST-POSITIVE-FIXNUM bytes ahead. It also depends on
 196 ;;; INTEGER-/-INTEGER calling SIGNED-TRUNCATE. I believe Raymond Toy
 197 ;;; says that the Sparc backend (at least for CMUCL) inlines this, so
 198 ;;; if SBCL does the same this test is probably not good for the
 199 ;;; Sparc.
 200 ;;;
 201 ;;; Disabling tail call elimination on this will probably ensure that
 202 ;;; the return value (to the flet or the enclosing top level form) is
 203 ;;; more than MOST-POSITIVE-FIXNUM with the current spaces on OS X.
 204 ;;; Enabling it might catch other problems, so do it anyway.
 205 (flet ((optimized ()
 206          (declare (optimize (speed 2) (debug 1))) ; tail call elimination
 207          (/ 42 0))
 208        (not-optimized ()
 209          (declare (optimize (speed 1) (debug 2))) ; no tail call elimination
 210          (/ 42 0))
 211        (test (fun)
 212          (declare (optimize (speed 1) (debug 2))) ; no tail call elimination
 213          (funcall fun)))
 214   (with-test (:name (:divide-by-zero :bug-346)
 215               :fails-on :alpha)  ; bug 346
 216     (assert (verify-backtrace (lambda () (test #'optimized))
 217                               (list '(/ 42 &rest)
 218                                     (list `(flet test :in ,*p*) #'optimized)))))
 219   (with-test (:name (:divide-by-zero :bug-356)
 220               :fails-on :alpha)  ; bug 356
 221     (assert (verify-backtrace (lambda () (test #'not-optimized))
 222                               (list '(/ 42 &rest)
 223                                     `((flet not-optimized :in ,*p*))
 224                                     (list `(flet test :in ,*p*) #'not-optimized))))))
 225
 226 (with-test (:name (:throw :no-such-tag)
 227             :fails-on '(or
 228                         (and :sparc :linux)
 229                         :alpha
 230                         :mips))
 231   (progn
 232     (defun throw-test ()
 233       (throw 'no-such-tag t))
 234     (assert (verify-backtrace #'throw-test '((throw-test))))))
 235
 236 (defun bug-308926 (x)
 237   (let ((v "foo"))
 238     (flet ((bar (z)
 239              (oops v z)
 240              (oops z v)))
 241       (bar x)
 242       (bar v))))
 243
 244 (with-test (:name :bug-308926)
 245   (assert (verify-backtrace (lambda () (bug-308926 13))
 246                             '(((flet bar :in bug-308926) 13)
 247                               (bug-308926 &rest t)))))
 248
 249 ;;; test entry point handling in backtraces
 250
 251 (defun oops ()
 252   (error "oops"))
 253
 254 (with-test (:name :xep-too-many-arguments)
 255   (assert (verify-backtrace (lambda () (oops 1 2 3 4 5 6))
 256                             '((oops ? ? ? ? ? ?)))))
 257
 258 (defmacro defbt (n ll &body body)
 259   ;; WTF is this? This is a way to make these tests not depend so much on the
 260   ;; details of LOAD/EVAL. Around 1.0.57 we changed %SIMPLE-EVAL to be
 261   ;; slightly smarter, which meant that things which used to have xeps
 262   ;; suddently had tl-xeps, etc. This takes care of that.
 263   `(funcall
 264     (compile nil
 265              '(lambda ()
 266                (progn
 267                  ;; normal debug info
 268                  (defun ,(intern (format nil "BT.~A.1" n)) ,ll
 269                    ,@body)
 270                  ;; no arguments saved
 271                  (defun ,(intern (format nil "BT.~A.2" n)) ,ll
 272                    (declare (optimize (debug 1) (speed 3)))
 273                    ,@body)
 274                  ;; no lambda-list saved
 275                  (defun ,(intern (format nil "BT.~A.3" n)) ,ll
 276                    (declare (optimize (debug 0)))
 277                    ,@body))))))
 278
 279 (defbt 1 (&key key)
 280   (list key))
 281
 282 (defbt 2 (x)
 283   (list x))
 284
 285 (defbt 3 (&key (key (oops)))
 286   (list key))
 287
 288 ;;; ERROR instead of OOPS so that tail call elimination doesn't happen
 289 (defbt 4 (&optional opt)
 290   (list (error "error")))
 291
 292 (defbt 5 (&optional (opt (oops)))
 293   (list opt))
 294
 295 (defmacro with-details (bool &body body)
 296   `(let ((sb-debug:*show-entry-point-details* ,bool))
 297      ,@body))
 298
 299 (defun bug-354 (x)
 300   (error "XEPs in backtraces: ~S" x))
 301
 302 (with-test (:name :bug-354)
 303   (with-details t
 304     (assert (not (verify-backtrace (lambda () (bug-354 354))
 305                                    '((bug-354 &rest)
 306                                      ((sb-c::tl-xep bug-354) &rest))))))
 307   (assert (verify-backtrace (lambda () (bug-354 354)) '((bug-354 354)))))
 308
 309 ;;; FIXME: This test really should be broken into smaller pieces
 310 (with-test (:name (:backtrace :tl-xep))
 311   (with-details t
 312     (assert (verify-backtrace #'namestring
 313                               '(((sb-c::tl-xep namestring) 0 ?)))))
 314   (with-details nil
 315     (assert (verify-backtrace #'namestring
 316                               '((namestring))))))
 317
 318 (with-test (:name (:backtrace :more-processor))
 319   (with-details t
 320     (assert (verify-backtrace (lambda () (bt.1.1 :key))
 321                               '(((sb-c::&more-processor bt.1.1) &rest))))
 322     (assert (verify-backtrace (lambda () (bt.1.2 :key))
 323                               '(((sb-c::&more-processor bt.1.2) &rest))))
 324     (assert (verify-backtrace (lambda () (bt.1.3 :key))
 325                               '(((sb-c::&more-processor bt.1.3) &rest)))))
 326   (with-details nil
 327     (assert (verify-backtrace (lambda () (bt.1.1 :key))
 328                               '((bt.1.1 :key))))
 329     (assert (verify-backtrace (lambda () (bt.1.2 :key))
 330                               '((bt.1.2 &rest))))
 331     (assert (verify-backtrace (lambda () (bt.1.3 :key))
 332                               '((bt.1.3 &rest))))))
 333
 334 (with-test (:name (:backtrace :xep))
 335   (with-details t
 336     (assert (verify-backtrace #'bt.2.1
 337                               '(((sb-c::xep bt.2.1) 0 ?))))
 338     (assert (verify-backtrace #'bt.2.2
 339                               '(((sb-c::xep bt.2.2) &rest))))
 340     (assert (verify-backtrace #'bt.2.3
 341                               '(((sb-c::xep bt.2.3) &rest)))))
 342   (with-details nil
 343     (assert (verify-backtrace #'bt.2.1
 344                               '((bt.2.1))))
 345     (assert (verify-backtrace #'bt.2.2
 346                               '((bt.2.2 &rest))))
 347     (assert (verify-backtrace #'bt.2.3
 348                               '((bt.2.3 &rest))))))
 349
 350 (with-test (:name (:backtrace :varargs-entry))
 351   (with-details t
 352     (assert (verify-backtrace #'bt.3.1
 353                               '(((sb-c::varargs-entry bt.3.1) :key nil))))
 354     (assert (verify-backtrace #'bt.3.2
 355                               '(((sb-c::varargs-entry bt.3.2) :key ?))))
 356     (assert (verify-backtrace #'bt.3.3
 357                               '(((sb-c::varargs-entry bt.3.3) &rest)))))
 358   (with-details nil
 359     (assert (verify-backtrace #'bt.3.1
 360                               '((bt.3.1 :key nil))))
 361     (assert (verify-backtrace #'bt.3.2
 362                               '((bt.3.2 :key ?))))
 363     (assert (verify-backtrace #'bt.3.3
 364                               '((bt.3.3 &rest))))))
 365
 366 (with-test (:name (:backtrace :hairy-args-processor))
 367   (with-details t
 368     (assert (verify-backtrace #'bt.4.1
 369                               '(((sb-c::hairy-arg-processor bt.4.1) ?))))
 370     (assert (verify-backtrace #'bt.4.2
 371                               '(((sb-c::hairy-arg-processor bt.4.2) ?))))
 372     (assert (verify-backtrace #'bt.4.3
 373                               '(((sb-c::hairy-arg-processor bt.4.3) &rest)))))
 374   (with-details nil
 375     (assert (verify-backtrace #'bt.4.1
 376                               '((bt.4.1 ?))))
 377     (assert (verify-backtrace #'bt.4.2
 378                               '((bt.4.2 ?))))
 379     (assert (verify-backtrace #'bt.4.3
 380                               '((bt.4.3 &rest))))))
 381
 382
 383 (with-test (:name (:backtrace :optional-processor))
 384   (with-details t
 385     (assert (verify-backtrace #'bt.5.1
 386                               '(((sb-c::&optional-processor bt.5.1)))))
 387     (assert (verify-backtrace #'bt.5.2
 388                               '(((sb-c::&optional-processor bt.5.2) &rest))))
 389     (assert (verify-backtrace #'bt.5.3
 390                               '(((sb-c::&optional-processor bt.5.3) &rest)))))
 391   (with-details nil
 392     (assert (verify-backtrace #'bt.5.1
 393                               '((bt.5.1))))
 394     (assert (verify-backtrace #'bt.5.2
 395                               '((bt.5.2 &rest))))
 396     (assert (verify-backtrace #'bt.5.3
 397                               '((bt.5.3 &rest))))))
 398
 399 (write-line "//compile nil")
 400 (defvar *compile-nil-error* (compile nil '(lambda (x) (cons (when x (error "oops")) nil))))
 401 (defvar *compile-nil-non-tc* (compile nil '(lambda (y) (cons (funcall *compile-nil-error* y) nil))))
 402 (with-test (:name (:compile nil))
 403   (assert (verify-backtrace (lambda () (funcall *compile-nil-non-tc* 13))
 404                             `(((lambda (x) :in ,*p*) 13)
 405                               ((lambda (y) :in ,*p*) 13)))))
 406
 407 (with-test (:name :clos-slot-typecheckfun-named)
 408   (assert
 409    (verify-backtrace
 410     (lambda ()
 411       (eval `(locally (declare (optimize safety))
 412                (defclass clos-typecheck-test ()
 413                  ((slot :type fixnum)))
 414                (setf (slot-value (make-instance 'clos-typecheck-test) 'slot) t))))
 415     '(((sb-pcl::slot-typecheck fixnum) t)))))
 416
 417 (with-test (:name :clos-emf-named)
 418   (assert
 419    (verify-backtrace
 420     (lambda ()
 421       (eval `(progn
 422                (defmethod clos-emf-named-test ((x symbol)) x)
 423                (defmethod clos-emf-named-test :before (x) (assert x))
 424                (clos-emf-named-test nil))))
 425     '(((sb-pcl::emf clos-emf-named-test) ? ? nil)))))
 426
 427 (with-test (:name :bug-310173)
 428   (flet ((make-fun (n)
 429            (let* ((names '(a b))
 430                   (req (loop repeat n collect (pop names))))
 431              (compile nil
 432                       `(lambda (,@req &rest rest)
 433                          (let ((* *)) ; no tail-call
 434                            (apply '/ ,@req rest)))))))
 435     (assert
 436      (verify-backtrace (lambda ()
 437                          (funcall (make-fun 0) 10 11 0))
 438                        `((sb-kernel:two-arg-/ 10/11 0)
 439                          (/ 10 11 0)
 440                          ((lambda (&rest rest) :in ,*p*) 10 11 0))))
 441     (assert
 442      (verify-backtrace (lambda ()
 443                          (funcall (make-fun 1) 10 11 0))
 444                        `((sb-kernel:two-arg-/ 10/11 0)
 445                          (/ 10 11 0)
 446                          ((lambda (a &rest rest) :in ,*p*) 10 11 0))))
 447     (assert
 448      (verify-backtrace (lambda ()
 449                          (funcall (make-fun 2) 10 11 0))
 450                        `((sb-kernel:two-arg-/ 10/11 0)
 451                          (/ 10 11 0)
 452                          ((lambda (a b &rest rest) :in ,*p*) 10 11 0))))))
 453
 454 ;;;; test TRACE
 455
 456 (defun trace-this ()
 457   'ok)
 458
 459 (defun trace-fact (n)
 460   (if (zerop n)
 461       1
 462       (* n (trace-fact (1- n)))))
 463
 464 (with-test (:name (trace :simple))
 465   (let ((out (with-output-to-string (*trace-output*)
 466                (trace trace-this)
 467                (assert (eq 'ok (trace-this)))
 468                (untrace))))
 469     (assert (search "TRACE-THIS" out))
 470     (assert (search "returned OK" out))))
 471
 472 ;;; bug 379
 473 ;;; This is not a WITH-TEST :FAILS-ON PPC DARWIN since there are
 474 ;;; suspicions that the breakpoint trace might corrupt the whole image
 475 ;;; on that platform.
 476 (with-test (:name (trace :encapsulate nil)
 477             :fails-on '(or (and :ppc (not :linux)) :sparc :mips)
 478             :broken-on '(or :darwin :sunos))
 479   (let ((out (with-output-to-string (*trace-output*)
 480                (trace trace-this :encapsulate nil)
 481                (assert (eq 'ok (trace-this)))
 482                (untrace))))
 483     (assert (search "TRACE-THIS" out))
 484     (assert (search "returned OK" out))))
 485
 486 (with-test (:name (trace-recursive :encapsulate nil)
 487             :fails-on '(or (and :ppc (not :linux)) :sparc :mips :sunos)
 488             :broken-on '(or :darwin (and :x86 :sunos)))
 489   (let ((out (with-output-to-string (*trace-output*)
 490                (trace trace-fact :encapsulate nil)
 491                (assert (= 120 (trace-fact 5)))
 492                (untrace))))
 493     (assert (search "TRACE-FACT" out))
 494     (assert (search "returned 1" out))
 495     (assert (search "returned 120" out))))
 496
 497 (defun trace-and-fmakunbound-this (x)
 498   x)
 499
 500 (with-test (:name :bug-667657)
 501   (trace trace-and-fmakunbound-this)
 502   (fmakunbound 'trace-and-fmakunbound-this)
 503   (untrace)
 504   (assert (not (trace))))
 505
 506 (with-test (:name :bug-414)
 507   (handler-bind ((warning #'error))
 508     (load (compile-file "bug-414.lisp"))
 509     (disassemble 'bug-414)))
 510
 511 (with-test (:name :bug-310175 :fails-on '(not :stack-allocatable-lists))
 512   ;; KLUDGE: Not all DX-enabled platforms DX CONS, and the compiler
 513   ;; transforms two-arg-LIST* (and one-arg-LIST) to CONS.  Therefore,
 514   ;; use two-arg-LIST, which should get through to VOP LIST, and thus
 515   ;; stack-allocate on a predictable set of machines.
 516   (let ((dx-arg (list t t)))
 517     (declare (dynamic-extent dx-arg))
 518     (flet ((dx-arg-backtrace (x)
 519              (declare (optimize (debug 2)))
 520              (prog1 (sb-debug:backtrace-as-list 10)
 521                (assert (sb-debug::stack-allocated-p x)))))
 522       (declare (notinline dx-arg-backtrace))
 523       (assert (member-if (lambda (frame)
 524                            (and (consp frame)
 525                                 (consp (car frame))
 526                                 (equal '(flet dx-arg-backtrace :in) (butlast (car frame)))
 527                                 (notany #'sb-debug::stack-allocated-p (cdr frame))))
 528                          (dx-arg-backtrace dx-arg))))))
 529
 530 (with-test (:name :bug-795245)
 531   (assert
 532    (eq :ok
 533        (catch 'done
 534          (handler-bind
 535              ((error (lambda (e)
 536                        (declare (ignore e))
 537                        (handler-case
 538                            (sb-debug:backtrace 100 (make-broadcast-stream))
 539                          (error ()
 540                            (throw 'done :error))
 541                          (:no-error ()
 542                            (throw 'done :ok))))))
 543            (apply '/= nil 1 2 nil))))))
 544
 545 ;;;; test infinite error protection
 546
 547 (defmacro nest-errors (n-levels error-form)
 548   (if (< 0 n-levels)
 549       `(handler-bind ((error (lambda (condition)
 550                                (declare (ignore condition))
 551                                ,error-form)))
 552         (nest-errors ,(1- n-levels) ,error-form))
 553       error-form))
 554
 555 (defun erroring-debugger-hook (condition old-debugger-hook)
 556   (let ((*debugger-hook* old-debugger-hook))
 557     (format t "recursive condition: ~A~%" condition) (force-output)
 558     (error "recursive condition: ~A" condition)))
 559
 560 (defun test-inifinite-error-protection ()
 561   ;; after 50 successful throws to SB-IMPL::TOPLEVEL-CATCHER sbcl used
 562   ;; to halt, it produces so much garbage that's hard to suppress that
 563   ;; it is tested only once
 564   (write-line "--HARMLESS BUT ALARMING BACKTRACE COMING UP--")
 565   (let ((*debugger-hook* #'erroring-debugger-hook))
 566     (loop repeat 1 do
 567           (let ((error-counter 0)
 568                 (*terminal-io* (make-broadcast-stream)))
 569             (assert
 570              (not (eq
 571                    :normal-exit
 572                    (catch 'sb-impl::toplevel-catcher
 573                      (nest-errors 20 (error "infinite error ~s"
 574                                             (incf error-counter)))
 575                      :normal-exit)))))))
 576   (write-line "--END OF H-B-A-B--"))
 577
 578 (with-test (:name infinite-error-protection)
 579   (enable-debugger)
 580   (test-inifinite-error-protection))
 581
 582 (with-test (:name (infinite-error-protection :thread)
 583                   :skipped-on '(not :sb-thread))
 584   (enable-debugger)
 585   (let ((thread (sb-thread:make-thread #'test-inifinite-error-protection)))
 586     (loop while (sb-thread:thread-alive-p thread))))
 587
 588 ;; unconditional, in case either previous left it enabled
 589 (disable-debugger)
 590 \f
 591 ;;;; test some limitations of MAKE-LISP-OBJ
 592
 593 ;;; Older GENCGC systems had a bug in the pointer validation used by
 594 ;;; MAKE-LISP-OBJ that made SIMPLE-FUN objects always fail to
 595 ;;; validate.
 596 (with-test (:name (make-lisp-obj :simple-funs))
 597   (sb-sys:without-gcing
 598     (assert (eq #'identity
 599                 (sb-kernel:make-lisp-obj
 600                  (sb-kernel:get-lisp-obj-address
 601                   #'identity))))))
 602
 603 ;;; Older CHENEYGC systems didn't perform any real pointer validity
 604 ;;; checks beyond "is this pointer to somewhere in heap space".
 605 (with-test (:name (make-lisp-obj :pointer-validation))
 606   ;; Fun and games: We need to test MAKE-LISP-OBJ with a known-bogus
 607   ;; address, but we also need the GC to not pitch a fit if it sees an
 608   ;; object with said bogus address.  Thus, construct our known-bogus
 609   ;; object within an area of unboxed storage (a vector) in static
 610   ;; space.  We'll make it a simple object, (CONS 0 0), which has an
 611   ;; in-memory representation of two consecutive zero words.  We
 612   ;; allocate a three-word vector so that we can guarantee a
 613   ;; double-word aligned double-word of zeros no matter what happens
 614   ;; with the vector-data-offset (currently double-word aligned).
 615   (let* ((memory (sb-int:make-static-vector 3 :element-type `(unsigned-byte ,sb-vm:n-word-bits)
 616                                             :initial-element 0))
 617          (vector-data-address (sb-sys:sap-int (sb-kernel::vector-sap memory)))
 618          (object-base-address (logandc2 (+ vector-data-address sb-vm:lowtag-mask) sb-vm:lowtag-mask))
 619          (object-tagged-address (+ object-base-address sb-vm:list-pointer-lowtag)))
 620     (multiple-value-bind (object valid-p)
 621         (sb-kernel:make-lisp-obj object-tagged-address nil)
 622       (declare (ignore object))
 623       (assert (not valid-p)))))
 624
 625 (defun test-debugger (control form &rest targets)
 626   (let ((out (make-string-output-stream))
 627         (oops t))
 628     (unwind-protect
 629          (progn
 630            (with-simple-restart (debugger-test-done! "Debugger Test Done!")
 631              (let* ((*debug-io* (make-two-way-stream
 632                                  (make-string-input-stream control)
 633                                  (make-broadcast-stream out #+nil *standard-output*)))
 634                     ;; Initial announcement goes to *ERROR-OUTPUT*
 635                     (*error-output* *debug-io*)
 636                     (*invoke-debugger-hook* nil))
 637                (handler-bind ((error #'invoke-debugger))
 638                  (eval form))))
 639            (setf oops nil))
 640       (when oops
 641         (error "Uncontrolled unwind from debugger test.")))
 642     ;; For sanity's sake this is outside the *debug-io* rebinding -- otherwise
 643     ;; it could swallow our asserts!
 644     (with-input-from-string (s (get-output-stream-string out))
 645       (loop for line = (read-line s nil)
 646             while line
 647             do (assert targets)
 648                #+nil
 649                (format *error-output* "Got: ~A~%" line)
 650                (let ((match (pop targets)))
 651                  (if (eq '* match)
 652                      ;; Whatever, till the next line matches.
 653                      (let ((text (pop targets)))
 654                        (unless (search text line)
 655                          (push text targets)
 656                          (push match targets)))
 657                      (unless (search match line)
 658                        (format *error-output* "~&Wanted: ~S~%   Got: ~S~%" match line)
 659                        (setf oops t))))))
 660     ;; Check that we saw everything we wanted
 661     (when targets
 662       (error "Missed: ~S" targets))
 663     (assert (not oops))))
 664
 665 (with-test (:name (:debugger :source 1))
 666   (test-debugger
 667    "d
 668     source 0
 669     debugger-test-done!"
 670    `(progn
 671       (defun this-will-break (x)
 672                (declare (optimize debug))
 673                (let* ((y (- x x))
 674                       (z (/ x y)))
 675                  (+ x z)))
 676       (this-will-break 1))
 677    '*
 678    "debugger invoked"
 679    '*
 680    "DIVISION-BY-ZERO"
 681    "operands (1 0)"
 682    '*
 683    "INTEGER-/-INTEGER"
 684    "(THIS-WILL-BREAK 1)"
 685    "1]"
 686    "(/ X Y)"
 687    "1]"))
 688
 689 (with-test (:name (:debugger :source 2))
 690   (test-debugger
 691    "d
 692     source 0
 693     debugger-test-done!"
 694    `(locally (declare (optimize (speed 0) (safety 3) (debug 3)))
 695       (let ((f #'(lambda (x cont)
 696                    (print x (make-broadcast-stream))
 697                    (if (zerop x)
 698                        (error "foo")
 699                        (funcall cont (1- x) cont)))))
 700         (funcall f 10 f)))
 701    '*
 702    "debugger"
 703    '*
 704    "foo"
 705    '*
 706    "source: (ERROR \"foo\")"
 707    '*
 708    "(LAMBDA (X CONT)"
 709    '*
 710    "(FUNCALL CONT (1- X) CONT)"
 711    "1]"))
 712
 713 (with-test (:name (disassemble :high-debug-eval))
 714   (eval `(defun this-will-be-disassembled (x)
 715            (declare (optimize debug))
 716            (+ x x)))
 717   (let* ((oopses (make-string-output-stream))
 718          (disassembly
 719            (let ((*error-output* oopses))
 720              (with-output-to-string (*standard-output*)
 721                (disassemble 'this-will-be-disassembled)))))
 722     (with-input-from-string (s disassembly)
 723       (assert (search "; disassembly for THIS-WILL-BE-DISASSEMBLED"
 724                       (read-line s))))
 725     (let ((problems (get-output-stream-string oopses)))
 726       (unless (zerop (length problems))
 727         (error problems)))))
 728
 729 (defun this-too-will-be-disasssembled (x)
 730   (declare (optimize debug))
 731   (+ x x))
 732
 733 (with-test (:name (disassemble :high-debug-load))
 734   (let* ((oopses (make-string-output-stream))
 735          (disassembly
 736            (let ((*error-output* oopses))
 737              (with-output-to-string (*standard-output*)
 738                (disassemble 'this-too-will-be-disasssembled)))))
 739     (with-input-from-string (s disassembly)
 740       (assert (equal "; disassembly for THIS-TOO-WILL-BE-DISASSSEMBLED"
 741                      (read-line s))))
 742     (let ((problems (get-output-stream-string oopses)))
 743       (unless (zerop (length problems))
 744         (error problems)))))
 745
 746 (write-line "/debug.impure.lisp done")