;;; FIXME: The DEFVAR here is redundant with the (DECLAIM (SPECIAL ..))
;;; of all static symbols in early-impl.lisp.
(progn
- (defvar *current-catch-block*)
- (defvar *current-unwind-protect-block*)
+ (defvar sb!vm::*current-catch-block*)
+ (defvar sb!vm::*current-unwind-protect-block*)
+ #!+hpux (defvar sb!vm::*c-lra*)
(defvar *free-interrupt-context-index*))
\f
;;; specials initialized by !COLD-INIT
;;; FIXME: These could be converted to DEFVARs.
-(declaim (special *gc-inhibit* *already-maybe-gcing*
- *need-to-collect-garbage*
- *gc-notify-stream*
- *before-gc-hooks* *after-gc-hooks*
- #!+x86 *pseudo-atomic-atomic*
- #!+x86 *pseudo-atomic-interrupted*
- sb!unix::*interrupts-enabled*
- sb!unix::*interrupt-pending*
- *type-system-initialized*))
+(declaim (special #!+(or x86 x86-64) *pseudo-atomic-bits*
+ *allow-with-interrupts*
+ *interrupts-enabled*
+ *interrupt-pending*
+ #!+sb-thruption *thruption-pending*
+ *type-system-initialized*))
(defvar *cold-init-complete-p*)
;;; counts of nested errors (with internal errors double-counted)
(defvar *maximum-error-depth*)
(defvar *current-error-depth*)
+
+;;;; default initfiles
+
+(defun sysinit-pathname ()
+ (or (let ((sbcl-homedir (sbcl-homedir-pathname)))
+ (when sbcl-homedir
+ (probe-file (merge-pathnames "sbclrc" sbcl-homedir))))
+ #!+win32
+ (merge-pathnames "sbcl\\sbclrc"
+ (sb!win32::get-folder-pathname
+ sb!win32::csidl_common_appdata))
+ #!-win32
+ "/etc/sbclrc"))
+
+(defun userinit-pathname ()
+ (merge-pathnames ".sbclrc" (user-homedir-pathname)))
+
+(defvar *sysinit-pathname-function* #'sysinit-pathname
+ #!+sb-doc
+ "Designator for a function of zero arguments called to obtain a
+pathname designator for the default sysinit file, or NIL. If the
+function returns NIL, no sysinit file is used unless one has been
+specified on the command-line.")
+
+(defvar *userinit-pathname-function* #'userinit-pathname
+ #!+sb-doc
+ "Designator for a function of zero arguments called to obtain a
+pathname designator or a stream for the default userinit file, or NIL.
+If the function returns NIL, no userinit file is used unless one has
+been specified on the command-line.")
+
\f
;;;; miscellaneous utilities for working with with TOPLEVEL
;;; by QUIT) is caught and any final processing and return codes are
;;; handled appropriately.
(defmacro handling-end-of-the-world (&body body)
- (let ((caught (gensym "CAUGHT")))
- `(let ((,caught (catch '%end-of-the-world
- (/show0 "inside CATCH '%END-OF-THE-WORLD")
- ,@body)))
- (/show0 "back from CATCH '%END-OF-THE-WORLD, flushing output")
- (flush-standard-output-streams)
- (/show0 "calling UNIX-EXIT")
- (sb!unix:unix-exit ,caught))))
+ `(without-interrupts
+ (catch '%end-of-the-world
+ (unwind-protect
+ (with-local-interrupts
+ (unwind-protect
+ (progn ,@body)
+ (call-exit-hooks)))
+ (%exit)))))
+
+(defvar *exit-lock*)
+(defvar *exit-in-process* nil)
+(declaim (type (or null real) *exit-timeout*))
+(defvar *exit-timeout* 60
+ "Default amount of seconds, if any, EXIT should wait for other
+threads to finish after terminating them. Default value is 60. NIL
+means to wait indefinitely.")
+
+(defun os-exit-handler (condition)
+ (declare (ignore condition))
+ (os-exit *exit-in-process* :abort t))
+
+(defvar *exit-error-handler* #'os-exit-handler)
+
+(defun call-exit-hooks ()
+ (unless *exit-in-process*
+ (setf *exit-in-process* 0))
+ (handler-bind ((serious-condition *exit-error-handler*))
+ (call-hooks "exit" *exit-hooks* :on-error :warn)))
+
+(defun %exit ()
+ ;; If anything goes wrong, we will exit immediately and forcibly.
+ (handler-bind ((serious-condition *exit-error-handler*))
+ (let ((ok nil)
+ (code *exit-in-process*))
+ (if (consp code)
+ ;; Another thread called EXIT, and passed the buck to us -- only
+ ;; final call left to do.
+ (os-exit (car code) :abort nil)
+ (unwind-protect
+ (progn
+ (flush-standard-output-streams)
+ (sb!thread::%exit-other-threads)
+ (setf ok t))
+ (os-exit code :abort (not ok)))))))
\f
;;;; working with *CURRENT-ERROR-DEPTH* and *MAXIMUM-ERROR-DEPTH*
(let ((*current-error-depth* (1+ *current-error-depth*)))
(/show0 "in INFINITE-ERROR-PROTECT, incremented error depth")
;; arbitrary truncation
- #!+sb-show (sb!debug:backtrace 8)
+ #!+sb-show (sb!debug:print-backtrace :count 8)
,@forms)))
;;; a helper function for INFINITE-ERROR-PROTECT
(/show0 "entering INFINITE-ERROR-PROTECTOR, *CURRENT-ERROR-DEPTH*=..")
(/hexstr *current-error-depth*)
(cond ((not *cold-init-complete-p*)
- (%primitive print "Argh! error in cold init, halting")
- (%primitive sb!c:halt))
- ((or (not (boundp '*current-error-depth*))
- (not (realp *current-error-depth*))
- (not (boundp '*maximum-error-depth*))
- (not (realp *maximum-error-depth*)))
- (%primitive print "Argh! corrupted error depth, halting")
- (%primitive sb!c:halt))
- ((> *current-error-depth* *maximum-error-depth*)
- (/show0 "*MAXIMUM-ERROR-DEPTH*=..")
- (/hexstr *maximum-error-depth*)
- (/show0 "in INFINITE-ERROR-PROTECTOR, calling ERROR-ERROR")
- (error-error "Help! "
- *current-error-depth*
- " nested errors. "
- "KERNEL:*MAXIMUM-ERROR-DEPTH* exceeded.")
- t)
- (t
- (/show0 "returning normally from INFINITE-ERROR-PROTECTOR")
- nil)))
-
-;;; FIXME: I had a badly broken version of INFINITE-ERROR-PROTECTOR at
-;;; one point (shown below), and SBCL cross-compiled it without
-;;; warning about FORMS being undefined. Check whether that problem
-;;; (missing warning) is repeatable in the final system and if so, fix
-;;; it.
-#|
-(defun infinite-error-protector ()
- `(cond ((not *cold-init-complete-p*)
- (%primitive print "Argh! error in cold init, halting")
- (%primitive sb!c:halt))
- ((or (not (boundp '*current-error-depth*))
- (not (realp *current-error-depth*))
- (not (boundp '*maximum-error-depth*))
- (not (realp *maximum-error-depth*)))
- (%primitive print "Argh! corrupted error depth, halting")
- (%primitive sb!c:halt))
- ((> *current-error-depth* *maximum-error-depth*)
- (/show0 "in INFINITE-ERROR-PROTECTOR, calling ERROR-ERROR")
- (error-error "Help! "
- *current-error-depth*
- " nested errors. "
- "KERNEL:*MAXIMUM-ERROR-DEPTH* exceeded.")
- (progn ,@forms)
- t)
- (t
- (/show0 "in INFINITE-ERROR-PROTECTOR, returning normally")
- nil)))
-|#
+ (%primitive print "Argh! error in cold init, halting")
+ (%primitive sb!c:halt))
+ ((or (not (boundp '*current-error-depth*))
+ (not (realp *current-error-depth*))
+ (not (boundp '*maximum-error-depth*))
+ (not (realp *maximum-error-depth*)))
+ (%primitive print "Argh! corrupted error depth, halting")
+ (%primitive sb!c:halt))
+ ((> *current-error-depth* *maximum-error-depth*)
+ (/show0 "*MAXIMUM-ERROR-DEPTH*=..")
+ (/hexstr *maximum-error-depth*)
+ (/show0 "in INFINITE-ERROR-PROTECTOR, calling ERROR-ERROR")
+ (error-error "Help! "
+ *current-error-depth*
+ " nested errors. "
+ "SB-KERNEL:*MAXIMUM-ERROR-DEPTH* exceeded.")
+ t)
+ (t
+ (/show0 "returning normally from INFINITE-ERROR-PROTECTOR")
+ nil)))
\f
;;;; miscellaneous external functions
-#!-mp ; The multi-processing version is defined in multi-proc.lisp.
-(defun sleep (n)
+(defun split-seconds-for-sleep (seconds)
+ (declare (optimize speed))
+ (flet ((split-float ()
+ ;; KLUDGE: This whole thing to avoid consing floats
+ (let ((whole-seconds (truly-the fixnum (%unary-truncate seconds))))
+ (values whole-seconds
+ (truly-the fixnum
+ (%unary-truncate (* (- seconds whole-seconds)
+ (load-time-value 1s9 t))))))))
+ (declare (inline split-float))
+ (typecase seconds
+ ((single-float 0s0 #.(float most-positive-fixnum 1s0))
+ (split-float))
+ ((double-float 0d0 #.(float most-positive-fixnum 1d0))
+ (split-float))
+ (ratio
+ (multiple-value-bind (quot rem) (truncate (numerator seconds)
+ (denominator seconds))
+ (values quot
+ (* rem (/ 1000000000 (denominator seconds))))))
+ (t
+ (multiple-value-bind (sec frac)
+ (truncate seconds)
+ (values sec (truncate frac (load-time-value 1s-9 t))))))))
+
+(defun sleep (seconds)
#!+sb-doc
- "This function causes execution to be suspended for N seconds. N may
- be any non-negative, non-complex number."
- (when (or (not (realp n))
- (minusp n))
+ "This function causes execution to be suspended for SECONDS. SECONDS may be
+any non-negative real number."
+ (when (or (not (realp seconds))
+ (minusp seconds))
(error 'simple-type-error
- :format-control "invalid argument to SLEEP: ~S"
- :format-arguments (list n)
- :datum n
+ :format-control "Invalid argument to SLEEP: ~S, ~
+ should be a non-negative real."
+ :format-arguments (list seconds)
+ :datum seconds
:expected-type '(real 0)))
- (multiple-value-bind (sec usec)
- (if (integerp n)
- (values n 0)
- (multiple-value-bind (sec frac)
- (truncate n)
- (values sec (truncate frac 1e-6))))
- (sb!unix:unix-select 0 0 0 0 sec usec))
+ #!-(and win32 (not sb-thread))
+ (multiple-value-bind (sec nsec)
+ (if (integerp seconds)
+ (values seconds 0)
+ (split-seconds-for-sleep seconds))
+ ;; nanosleep() accepts time_t as the first argument, but on some platforms
+ ;; it is restricted to 100 million seconds. Maybe someone can actually
+ ;; have a reason to sleep for over 3 years?
+ (loop while (> sec (expt 10 8))
+ do (decf sec (expt 10 8))
+ (sb!unix:nanosleep (expt 10 8) 0))
+ (sb!unix:nanosleep sec nsec))
+ #!+(and win32 (not sb-thread))
+ (sb!win32:millisleep (truncate (* seconds 1000)))
nil)
\f
-;;;; SCRUB-CONTROL-STACK
-
-(defconstant bytes-per-scrub-unit 2048)
-
-;;; Zero the unused portion of the control stack so that old objects
-;;; are not kept alive because of uninitialized stack variables.
-
-;;; "To summarize the problem, since not all allocated stack frame
-;;; slots are guaranteed to be written by the time you call an another
-;;; function or GC, there may be garbage pointers retained in your
-;;; dead stack locations. The stack scrubbing only affects the part
-;;; of the stack from the SP to the end of the allocated stack."
-;;; - ram, on cmucl-imp, Tue, 25 Sep 2001
-
-;;; So, as an (admittedly lame) workaround, from time to time we call
-;;; scrub-control-stack to zero out all the unused portion. This is
-;;; supposed to happen when the stack is mostly empty, so that we have
-;;; a chance of clearing more of it: callers are currently (2002.07.18)
-;;; REPL and SUB-GC
-
-(defun scrub-control-stack ()
- (declare (optimize (speed 3) (safety 0))
- (values (unsigned-byte 20))) ; FIXME: DECLARE VALUES?
-
- #!-stack-grows-downward-not-upward
- (let* ((csp (sap-int (sb!c::control-stack-pointer-sap)))
- (initial-offset (logand csp (1- bytes-per-scrub-unit)))
- (end-of-stack
- (- sb!vm:control-stack-end sb!c:*backend-page-size*)))
- (labels
- ((scrub (ptr offset count)
- (declare (type system-area-pointer ptr)
- (type (unsigned-byte 16) offset)
- (type (unsigned-byte 20) count)
- (values (unsigned-byte 20)))
- (cond ((>= (sap-int ptr) end-of-stack) 0)
- ((= offset bytes-per-scrub-unit)
- (look (sap+ ptr bytes-per-scrub-unit) 0 count))
- (t
- (setf (sap-ref-32 ptr offset) 0)
- (scrub ptr (+ offset sb!vm:n-word-bytes) count))))
- (look (ptr offset count)
- (declare (type system-area-pointer ptr)
- (type (unsigned-byte 16) offset)
- (type (unsigned-byte 20) count)
- (values (unsigned-byte 20)))
- (cond ((>= (sap-int ptr) end-of-stack) 0)
- ((= offset bytes-per-scrub-unit)
- count)
- ((zerop (sap-ref-32 ptr offset))
- (look ptr (+ offset sb!vm:n-word-bytes) count))
- (t
- (scrub ptr offset (+ count sb!vm:n-word-bytes))))))
- (declare (type (unsigned-byte 32) csp))
- (scrub (int-sap (- csp initial-offset))
- (* (floor initial-offset sb!vm:n-word-bytes) sb!vm:n-word-bytes)
- 0)))
-
- #!+stack-grows-downward-not-upward
- (let* ((csp (sap-int (sb!c::control-stack-pointer-sap)))
- (end-of-stack (+ sb!vm:control-stack-start sb!c:*backend-page-size*))
- (initial-offset (logand csp (1- bytes-per-scrub-unit))))
- (labels
- ((scrub (ptr offset count)
- (declare (type system-area-pointer ptr)
- (type (unsigned-byte 16) offset)
- (type (unsigned-byte 20) count)
- (values (unsigned-byte 20)))
- (let ((loc (int-sap (- (sap-int ptr) (+ offset sb!vm:n-word-bytes)))))
- (cond ((< (sap-int loc) end-of-stack) 0)
- ((= offset bytes-per-scrub-unit)
- (look (int-sap (- (sap-int ptr) bytes-per-scrub-unit))
- 0 count))
- (t ;; need to fix bug in %SET-STACK-REF
- (setf (sap-ref-32 loc 0) 0)
- (scrub ptr (+ offset sb!vm:n-word-bytes) count)))))
- (look (ptr offset count)
- (declare (type system-area-pointer ptr)
- (type (unsigned-byte 16) offset)
- (type (unsigned-byte 20) count)
- (values (unsigned-byte 20)))
- (let ((loc (int-sap (- (sap-int ptr) offset))))
- (cond ((< (sap-int loc) end-of-stack) 0)
- ((= offset bytes-per-scrub-unit)
- count)
- ((zerop (sb!kernel::get-lisp-obj-address (stack-ref loc 0)))
- (look ptr (+ offset sb!vm:n-word-bytes) count))
- (t
- (scrub ptr offset (+ count sb!vm:n-word-bytes)))))))
- (declare (type (unsigned-byte 32) csp))
- (scrub (int-sap (+ csp initial-offset))
- (* (floor initial-offset sb!vm:n-word-bytes) sb!vm:n-word-bytes)
- 0))))
-\f
;;;; the default toplevel function
(defvar / nil
(defvar +++ nil #!+sb-doc "the previous value of ++")
(defvar - nil #!+sb-doc "the form currently being evaluated")
-(defun interactive-eval (form)
+(defun interactive-eval (form &key (eval #'eval))
+ #!+sb-doc
"Evaluate FORM, returning whatever it returns and adjusting ***, **, *,
- +++, ++, +, ///, //, /, and -."
++++, ++, +, ///, //, /, and -."
(setf - form)
- (let ((results
- (multiple-value-list
- (eval-in-lexenv form
- (make-null-interactive-lexenv)))))
- (setf /// //
- // /
- / results
- *** **
- ** *
- * (car results)))
- (setf +++ ++
- ++ +
- + -)
+ (unwind-protect
+ (let ((results (multiple-value-list (funcall eval form))))
+ (setf /// //
+ // /
+ / results
+ *** **
+ ** *
+ * (car results)))
+ (setf +++ ++
+ ++ +
+ + -))
(unless (boundp '*)
;; The bogon returned an unbound marker.
;; FIXME: It would be safer to check every one of the values in RESULTS,
;; instead of just the first one.
(setf * nil)
(cerror "Go on with * set to NIL."
- "EVAL returned an unbound marker."))
+ "EVAL returned an unbound marker."))
(values-list /))
;;; Flush anything waiting on one of the ANSI Common Lisp standard
;;; output streams before proceeding.
(defun flush-standard-output-streams ()
- (dolist (name '(*debug-io*
- *error-output*
- *query-io*
- *standard-output*
- *trace-output*))
- (finish-output (symbol-value name)))
+ (let ((null (make-broadcast-stream)))
+ (dolist (name '(*debug-io*
+ *error-output*
+ *query-io*
+ *standard-output*
+ *trace-output*
+ *terminal-io*))
+ ;; 0. Pull out the underlying stream, so we know what it is.
+ ;; 1. Handle errors on it. We're doing this on entry to
+ ;; debugger, so we don't want recursive errors here.
+ ;; 2. Rebind the stream symbol in case some poor sod sees
+ ;; a broken stream here while running with *BREAK-ON-ERRORS*.
+ (let ((stream (stream-output-stream (symbol-value name))))
+ (progv (list name) (list null)
+ (handler-bind ((stream-error
+ (lambda (c)
+ (when (eq stream (stream-error-stream c))
+ (go :next)))))
+ (force-output stream))))
+ :next))
(values))
+(defun stream-output-stream (stream)
+ (typecase stream
+ (fd-stream
+ stream)
+ (synonym-stream
+ (stream-output-stream
+ (symbol-value (synonym-stream-symbol stream))))
+ (two-way-stream
+ (stream-output-stream
+ (two-way-stream-output-stream stream)))
+ (t
+ stream)))
+
+(defun process-init-file (specified-pathname kind)
+ (multiple-value-bind (context default-function)
+ (ecase kind
+ (:system
+ (values "sysinit" *sysinit-pathname-function*))
+ (:user
+ (values "userinit" *userinit-pathname-function*)))
+ (if specified-pathname
+ (with-open-file (stream (parse-native-namestring specified-pathname)
+ :if-does-not-exist nil)
+ (if stream
+ (load-as-source stream :context context)
+ (cerror "Ignore missing init file"
+ "The specified ~A file ~A was not found."
+ context specified-pathname)))
+ (let ((default (funcall default-function)))
+ (when default
+ (with-open-file (stream (pathname default) :if-does-not-exist nil)
+ (when stream
+ (load-as-source stream :context context))))))))
+
+(defun process-eval/load-options (options)
+ (/show0 "handling --eval and --load options")
+ (flet ((process-1 (cons)
+ (destructuring-bind (opt . value) cons
+ (ecase opt
+ (:eval
+ (with-simple-restart (continue "Ignore runtime option --eval ~S."
+ value)
+ (multiple-value-bind (expr pos) (read-from-string value)
+ (if (eq value (read-from-string value nil value :start pos))
+ (eval expr)
+ (error "Multiple expressions in --eval option: ~S"
+ value)))))
+ (:load
+ (with-simple-restart (continue "Ignore runtime option --load ~S."
+ value)
+ (load (native-pathname value))))
+ (:quit
+ (exit))))
+ (flush-standard-output-streams)))
+ (with-simple-restart (abort "Skip rest of --eval and --load options.")
+ (dolist (option options)
+ (process-1 option)))))
+
+(defun process-script (script)
+ (flet ((load-script (stream)
+ ;; Scripts don't need to be stylish or fast, but silence is usually a
+ ;; desirable quality...
+ (handler-bind (((or style-warning compiler-note) #'muffle-warning)
+ (stream-error (lambda (e)
+ ;; Shell-style.
+ (when (member (stream-error-stream e)
+ (list *stdout* *stdin* *stderr*))
+ (exit)))))
+ ;; Let's not use the *TTY* for scripts, ok? Also, normally we use
+ ;; synonym streams, but in order to have the broken pipe/eof error
+ ;; handling right we want to bind them for scripts.
+ (let ((*terminal-io* (make-two-way-stream *stdin* *stdout*))
+ (*debug-io* (make-two-way-stream *stdin* *stderr*))
+ (*standard-input* *stdin*)
+ (*standard-output* *stdout*)
+ (*error-output* *stderr*))
+ (load stream :verbose nil :print nil)))))
+ (handling-end-of-the-world
+ (if (eq t script)
+ (load-script *stdin*)
+ (with-open-file (f (native-pathname script) :element-type :default)
+ (sb!fasl::maybe-skip-shebang-line f)
+ (load-script f))))))
+
+;; Errors while processing the command line cause the system to EXIT,
+;; instead of trying to go into the Lisp debugger, because trying to
+;; go into the Lisp debugger would get into various annoying issues of
+;; where we should go after the user tries to return from the
+;; debugger.
+(defun startup-error (control-string &rest args)
+ (format *error-output*
+ "fatal error before reaching READ-EVAL-PRINT loop: ~% ~?~%"
+ control-string
+ args)
+ (exit :code 1))
+
;;; the default system top level function
(defun toplevel-init ()
-
(/show0 "entering TOPLEVEL-INIT")
-
- (let ((sysinit nil) ; value of --sysinit option
- (userinit nil) ; value of --userinit option
- (reversed-evals nil) ; values of --eval options, in reverse order; and
- ; also --load options, translated into --eval
- (noprint nil) ; Has a --noprint option been seen?
- (options (rest *posix-argv*))) ; skipping program name
+ (let ( ;; value of --sysinit option
+ (sysinit nil)
+ ;; t if --no-sysinit option given
+ (no-sysinit nil)
+ ;; value of --userinit option
+ (userinit nil)
+ ;; t if --no-userinit option given
+ (no-userinit nil)
+ ;; t if --disable-debugger option given
+ (disable-debugger nil)
+ ;; list of (<kind> . <string>) conses representing --eval and --load
+ ;; options. options. --eval options are stored as strings, so that
+ ;; they can be passed to READ only after their predecessors have been
+ ;; EVALed, so that things work when e.g. REQUIRE in one EVAL form
+ ;; creates a package referred to in the next EVAL form. Storing the
+ ;; original string also makes for easier debugging.
+ (reversed-options nil)
+ ;; Has a --noprint option been seen?
+ (noprint nil)
+ ;; Has a --script option been seen?
+ (script nil)
+ ;; Quit after processing other options?
+ (finally-quit nil)
+ ;; everything in *POSIX-ARGV* except for argv[0]=programname
+ (options (rest *posix-argv*)))
(declare (type list options))
(/show0 "done with outer LET in TOPLEVEL-INIT")
-
+
;; FIXME: There are lots of ways for errors to happen around here
;; (e.g. bad command line syntax, or READ-ERROR while trying to
;; READ an --eval string). Make sure that they're handled
- ;; reasonably. Also, perhaps all errors while parsing the command
- ;; line should cause the system to QUIT, instead of trying to go
- ;; into the Lisp debugger, since trying to go into the debugger
- ;; gets into various annoying issues of where we should go after
- ;; the user tries to return from the debugger.
-
- ;; Parse command line options.
+ ;; reasonably.
+
+ ;; Process command line options.
(loop while options do
- (/show0 "at head of LOOP WHILE OPTIONS DO in TOPLEVEL-INIT")
- (let ((option (first options)))
- (flet ((pop-option ()
- (if options
- (pop options)
- (error "unexpected end of command line options"))))
- (cond ((string= option "--sysinit")
- (pop-option)
- (if sysinit
- (error "multiple --sysinit options")
- (setf sysinit (pop-option))))
- ((string= option "--userinit")
- (pop-option)
- (if userinit
- (error "multiple --userinit options")
- (setf userinit (pop-option))))
- ((string= option "--eval")
- (pop-option)
- (let ((eval-as-string (pop-option)))
- (with-input-from-string (eval-stream eval-as-string)
- (let* ((eof-marker (cons :eof :eof))
- (eval (read eval-stream nil eof-marker))
- (eof (read eval-stream nil eof-marker)))
- (cond ((eq eval eof-marker)
- (error "unable to parse ~S"
- eval-as-string))
- ((not (eq eof eof-marker))
- (error "more than one expression in ~S"
- eval-as-string))
- (t
- (push eval reversed-evals)))))))
- ((string= option "--load")
- (pop-option)
- (push `(load ,(pop-option)) reversed-evals))
- ((string= option "--noprint")
- (pop-option)
- (setf noprint t))
- ;; FIXME: --noprogrammer was deprecated in 0.7.5, and
- ;; in a year or so this backwards compatibility can
- ;; go away.
- ((string= option "--noprogrammer")
- (warn "treating deprecated --noprogrammer as --disable-debugger")
- (pop-option)
- (push '(disable-debugger) reversed-evals))
- ((string= option "--disable-debugger")
- (pop-option)
- (push '(disable-debugger) reversed-evals))
- ((string= option "--end-toplevel-options")
- (pop-option)
- (return))
- (t
- ;; Anything we don't recognize as a toplevel
- ;; option must be the start of user-level
- ;; options.. except that if we encounter
- ;; "--end-toplevel-options" after we gave up
- ;; because we didn't recognize an option as a
- ;; toplevel option, then the option we gave up on
- ;; must have been an error. (E.g. in
- ;; "sbcl --eval '(a)' --eval'(b)' --end-toplevel-options"
- ;; this test will let us detect that the string
- ;; "--eval(b)" is an error.)
- (if (find "--end-toplevel-options" options
- :test #'string=)
- (error "bad toplevel option: ~S" (first options))
- (return)))))))
+ (/show0 "at head of LOOP WHILE OPTIONS DO in TOPLEVEL-INIT")
+ (let ((option (first options)))
+ (flet ((pop-option ()
+ (if options
+ (pop options)
+ (startup-error
+ "unexpected end of command line options"))))
+ (cond ((string= option "--script")
+ (pop-option)
+ (setf disable-debugger t
+ no-userinit t
+ no-sysinit t
+ script (if options (pop-option) t))
+ (return))
+ ((string= option "--sysinit")
+ (pop-option)
+ (if sysinit
+ (startup-error "multiple --sysinit options")
+ (setf sysinit (pop-option))))
+ ((string= option "--no-sysinit")
+ (pop-option)
+ (setf no-sysinit t))
+ ((string= option "--userinit")
+ (pop-option)
+ (if userinit
+ (startup-error "multiple --userinit options")
+ (setf userinit (pop-option))))
+ ((string= option "--no-userinit")
+ (pop-option)
+ (setf no-userinit t))
+ ((string= option "--eval")
+ (pop-option)
+ (push (cons :eval (pop-option)) reversed-options))
+ ((string= option "--load")
+ (pop-option)
+ (push (cons :load (pop-option)) reversed-options))
+ ((string= option "--noprint")
+ (pop-option)
+ (setf noprint t))
+ ((string= option "--disable-debugger")
+ (pop-option)
+ (setf disable-debugger t))
+ ((string= option "--quit")
+ (pop-option)
+ (setf finally-quit t))
+ ((string= option "--non-interactive")
+ ;; This option is short for --quit and --disable-debugger,
+ ;; which are needed in combination for reliable non-
+ ;; interactive startup.
+ (pop-option)
+ (setf finally-quit t)
+ (setf disable-debugger t))
+ ((string= option "--end-toplevel-options")
+ (pop-option)
+ (return))
+ (t
+ ;; Anything we don't recognize as a toplevel
+ ;; option must be the start of user-level
+ ;; options.. except that if we encounter
+ ;; "--end-toplevel-options" after we gave up
+ ;; because we didn't recognize an option as a
+ ;; toplevel option, then the option we gave up on
+ ;; must have been an error. (E.g. in
+ ;; "sbcl --eval '(a)' --eval'(b)' --end-toplevel-options"
+ ;; this test will let us detect that the string
+ ;; "--eval(b)" is an error.)
+ (if (find "--end-toplevel-options" options
+ :test #'string=)
+ (startup-error "bad toplevel option: ~S"
+ (first options))
+ (return)))))))
(/show0 "done with LOOP WHILE OPTIONS DO in TOPLEVEL-INIT")
- ;; Excise all the options that we processed, so that only
+ ;; Delete all the options that we processed, so that only
;; user-level options are left visible to user code.
- (setf (rest *posix-argv*) options)
+ (when *posix-argv*
+ (setf (rest *posix-argv*) options))
+
+ ;; Disable debugger before processing initialization files & co.
+ (when disable-debugger
+ (sb!ext:disable-debugger))
;; Handle initialization files.
(/show0 "handling initialization files in TOPLEVEL-INIT")
- (flet (;; If any of POSSIBLE-INIT-FILE-NAMES names a real file,
- ;; return its truename.
- (probe-init-files (&rest possible-init-file-names)
- (declare (type list possible-init-file-names))
- (/show0 "entering PROBE-INIT-FILES")
- (prog1
- (find-if (lambda (x)
- (and (stringp x) (probe-file x)))
- possible-init-file-names)
- (/show0 "leaving PROBE-INIT-FILES"))))
- (let* ((sbcl-home (posix-getenv "SBCL_HOME"))
- (sysinit-truename (if sbcl-home
- (probe-init-files sysinit
- (concatenate 'string
- sbcl-home
- "/sbclrc"))
- (probe-init-files sysinit
- "/etc/sbclrc"
- "/usr/local/etc/sbclrc")))
- (user-home (or (posix-getenv "HOME")
- (error "The HOME environment variable is unbound, ~
- so user init file can't be found.")))
- (userinit-truename (probe-init-files userinit
- (concatenate 'string
- user-home
- "/.sbclrc"))))
-
- ;; We wrap all the pre-REPL user/system customized startup code
- ;; in a restart.
- ;;
- ;; (Why not wrap everything, even the stuff above, in this
- ;; restart? Errors above here are basically command line or
- ;; Unix environment errors, e.g. a missing file or a typo on
- ;; the Unix command line, and you don't need to get into Lisp
- ;; to debug them, you should just start over and do it right
- ;; at the Unix level. Errors below here are generally errors
- ;; in user Lisp code, and it might be helpful to let the user
- ;; reach the REPL in order to help figure out what's going
- ;; on.)
- (restart-case
- (progn
- (flet ((process-init-file (truename)
- (when truename
- (unless (load truename)
- (error "~S was not successfully loaded." truename))
- (flush-standard-output-streams))))
- (process-init-file sysinit-truename)
- (process-init-file userinit-truename))
-
- ;; Process --eval options.
- (/show0 "handling --eval options in TOPLEVEL-INIT")
- (dolist (eval (reverse reversed-evals))
- (/show0 "handling one --eval option in TOPLEVEL-INIT")
- (eval eval)
- (flush-standard-output-streams)))
- (continue ()
- :report
- "Continue anyway (skipping to toplevel read/eval/print loop)."
- (/show0 "CONTINUEing from pre-REPL RESTART-CASE")
- (values)) ; (no-op, just fall through)
- (quit ()
- :report "Quit SBCL (calling #'QUIT, killing the process)."
- (/show0 "falling through to QUIT from pre-REPL RESTART-CASE")
- (quit))))
-
- ;; one more time for good measure, in case we fell out of the
- ;; RESTART-CASE above before one of the flushes in the ordinary
- ;; flow of control had a chance to operate
- (flush-standard-output-streams)
-
- (/show0 "falling into TOPLEVEL-REPL from TOPLEVEL-INIT")
- (toplevel-repl noprint)
- ;; (classic CMU CL error message: "You're certainly a clever child.":-)
- (critically-unreachable "after TOPLEVEL-REPL"))))
-
-;;; halt-on-failures and prompt-on-failures modes, suitable for
-;;; noninteractive and interactive use respectively
-(defun disable-debugger ()
- (setf *debugger-hook* 'noprogrammer-debugger-hook-fun
- *debug-io* *error-output*))
-(defun enable-debugger ()
- (setf *debugger-hook* nil
- *debug-io* *query-io*))
+ ;; This CATCH is needed for the debugger command TOPLEVEL to
+ ;; work.
+ (catch 'toplevel-catcher
+ ;; We wrap all the pre-REPL user/system customized startup
+ ;; code in a restart.
+ ;;
+ ;; (Why not wrap everything, even the stuff above, in this
+ ;; restart? Errors above here are basically command line
+ ;; or Unix environment errors, e.g. a missing file or a
+ ;; typo on the Unix command line, and you don't need to
+ ;; get into Lisp to debug them, you should just start over
+ ;; and do it right at the Unix level. Errors below here
+ ;; are generally errors in user Lisp code, and it might be
+ ;; helpful to let the user reach the REPL in order to help
+ ;; figure out what's going on.)
+ (restart-case
+ (progn
+ (unless no-sysinit
+ (process-init-file sysinit :system))
+ (unless no-userinit
+ (process-init-file userinit :user))
+ (when finally-quit
+ (push (list :quit) reversed-options))
+ (process-eval/load-options (nreverse reversed-options))
+ (when script
+ (process-script script)
+ (bug "PROCESS-SCRIPT returned")))
+ (abort ()
+ :report (lambda (s)
+ (write-string
+ (if script
+ ;; In case script calls (enable-debugger)!
+ "Abort script, exiting lisp."
+ "Skip to toplevel READ/EVAL/PRINT loop.")
+ s))
+ (/show0 "CONTINUEing from pre-REPL RESTART-CASE")
+ (values)) ; (no-op, just fall through)
+ (exit ()
+ :report "Exit SBCL (calling #'EXIT, killing the process)."
+ :test (lambda (c) (declare (ignore c)) (not script))
+ (/show0 "falling through to EXIT from pre-REPL RESTART-CASE")
+ (exit :code 1))))
+
+ ;; one more time for good measure, in case we fell out of the
+ ;; RESTART-CASE above before one of the flushes in the ordinary
+ ;; flow of control had a chance to operate
+ (flush-standard-output-streams)
+
+ (/show0 "falling into TOPLEVEL-REPL from TOPLEVEL-INIT")
+ (toplevel-repl noprint)
+ ;; (classic CMU CL error message: "You're certainly a clever child.":-)
+ (critically-unreachable "after TOPLEVEL-REPL")))
+
+;;; hooks to support customized toplevels like ACL-style toplevel from
+;;; KMR on sbcl-devel 2002-12-21. Altered by CSR 2003-11-16 for
+;;; threaded operation: altered *REPL-FUN* to *REPL-FUN-GENERATOR*.
+(defvar *repl-read-form-fun* #'repl-read-form-fun
+ #!+sb-doc
+ "A function of two stream arguments IN and OUT for the toplevel REPL to
+call: Return the next Lisp form to evaluate (possibly handling other magic --
+like ACL-style keyword commands -- which precede the next Lisp form). The OUT
+stream is there to support magic which requires issuing new prompts.")
+(defvar *repl-prompt-fun* #'repl-prompt-fun
+ #!+sb-doc
+ "A function of one argument STREAM for the toplevel REPL to call: Prompt
+the user for input.")
+(defvar *repl-fun-generator* (constantly #'repl-fun)
+ #!+sb-doc
+ "A function of no arguments returning a function of one argument NOPRINT
+that provides the REPL for the system. Assumes that *STANDARD-INPUT* and
+*STANDARD-OUTPUT* are set up.")
;;; read-eval-print loop for the default system toplevel
(defun toplevel-repl (noprint)
(/show0 "entering TOPLEVEL-REPL")
(let ((* nil) (** nil) (*** nil)
- (- nil)
- (+ nil) (++ nil) (+++ nil)
- (/// nil) (// nil) (/ nil))
- ;; WITH-SIMPLE-RESTART doesn't actually restart its body as some
- ;; (like WHN for an embarrassingly long time ca. 2001-12-07) might
- ;; think, but instead drops control back out at the end. So when a
- ;; TOPLEVEL or outermost-ABORT restart happens, we need this outer
- ;; LOOP wrapper to grab control and start over again. (And it also
- ;; wraps CATCH 'TOPLEVEL-CATCHER for similar reasons.)
- (loop
- (/show0 "about to set up restarts in TOPLEVEL-REPL")
- ;; There should only be one TOPLEVEL restart, and it's here, so
- ;; restarting at TOPLEVEL always bounces you all the way out here.
- (with-simple-restart (toplevel
- "Restart at toplevel READ/EVAL/PRINT loop.")
- ;; We add a new ABORT restart for every debugger level, so
- ;; restarting at ABORT in a nested debugger gets you out to the
- ;; innermost enclosing debugger, and only when you're in the
- ;; outermost, unnested debugger level does restarting at ABORT
- ;; get you out to here.
- (with-simple-restart
- (abort
- "~@<Reduce debugger level (leaving debugger, returning to toplevel).~@:>")
- (catch 'toplevel-catcher
- #!-sunos (sb!unix:unix-sigsetmask 0) ; FIXME: What is this for?
- ;; in the event of a control-stack-exhausted-error, we should
- ;; have unwound enough stack by the time we get here that this
- ;; is now possible
- (sb!kernel::protect-control-stack-guard-page 1)
- (repl noprint)
- (critically-unreachable "after REPL")))))))
+ (- nil)
+ (+ nil) (++ nil) (+++ nil)
+ (/// nil) (// nil) (/ nil))
+ (/show0 "about to funcall *REPL-FUN-GENERATOR*")
+ (let ((repl-fun (funcall *repl-fun-generator*)))
+ ;; Each REPL in a multithreaded world should have bindings of
+ ;; most CL specials (most critically *PACKAGE*).
+ (with-rebound-io-syntax
+ (handler-bind ((step-condition 'invoke-stepper))
+ (loop
+ (/show0 "about to set up restarts in TOPLEVEL-REPL")
+ ;; CLHS recommends that there should always be an
+ ;; ABORT restart; we have this one here, and one per
+ ;; debugger level.
+ (with-simple-restart
+ (abort "~@<Exit debugger, returning to top level.~@:>")
+ (catch 'toplevel-catcher
+ ;; In the event of a control-stack-exhausted-error, we
+ ;; should have unwound enough stack by the time we get
+ ;; here that this is now possible.
+ #!-win32
+ (sb!kernel::reset-control-stack-guard-page)
+ (funcall repl-fun noprint)
+ (critically-unreachable "after REPL")))))))))
;;; Our default REPL prompt is the minimal traditional one.
(defun repl-prompt-fun (stream)
;;; handle the Unix-style EOF-is-end-of-process convention.
(defun repl-read-form-fun (in out)
(declare (type stream in out) (ignore out))
+ ;; KLUDGE: *READ-SUPPRESS* makes the REPL useless, and cannot be
+ ;; recovered from -- flip it here.
+ (when *read-suppress*
+ (warn "Setting *READ-SUPPRESS* to NIL to restore toplevel usability.")
+ (setf *read-suppress* nil))
(let* ((eof-marker (cons nil nil))
- (form (read in nil eof-marker)))
+ (form (read in nil eof-marker)))
(if (eq form eof-marker)
- (quit)
- form)))
-
-;;; hooks to support customized toplevels like ACL-style toplevel
-;;; from KMR on sbcl-devel 2002-12-21
-(defvar *repl-read-form-fun* #'repl-read-form-fun
- "a function of two stream arguments IN and OUT for the toplevel REPL to
- call: Return the next Lisp form to evaluate (possibly handling other
- magic -- like ACL-style keyword commands -- which precede the next
- Lisp form). The OUT stream is there to support magic which requires
- issuing new prompts.")
-(defvar *repl-prompt-fun* #'repl-prompt-fun
- "a function of one argument STREAM for the toplevel REPL to call: Prompt
- the user for input.")
+ (exit)
+ form)))
-(defun repl (noprint)
+(defun repl-fun (noprint)
(/show0 "entering REPL")
- (let ((eof-marker (cons :eof nil)))
- (loop
- ;; (See comment preceding the definition of SCRUB-CONTROL-STACK.)
- (scrub-control-stack)
- (unless noprint
- (funcall *repl-prompt-fun* *standard-output*)
- ;; (Should *REPL-PROMPT-FUN* be responsible for doing its own
- ;; FORCE-OUTPUT? I can't imagine a valid reason for it not to
- ;; be done here, so leaving it up to *REPL-PROMPT-FUN* seems
- ;; odd. But maybe there *is* a valid reason in some
- ;; circumstances? perhaps some deadlock issue when being driven
- ;; by another process or something...)
- (force-output *standard-output*))
- (let* ((form (funcall *repl-read-form-fun*
- *standard-input*
- *standard-output*))
- (results (multiple-value-list (interactive-eval form))))
- (unless noprint
- (dolist (result results)
- (fresh-line)
- (prin1 result)))))))
-
-;;; suitable value for *DEBUGGER-HOOK* for a noninteractive Unix-y program
-(defun noprogrammer-debugger-hook-fun (condition old-debugger-hook)
- (declare (ignore old-debugger-hook))
- (flet ((failure-quit (&key recklessly-p)
- (/show0 "in FAILURE-QUIT (in --disable-debugger debugger hook)")
- (quit :unix-status 1 :recklessly-p recklessly-p)))
- ;; This HANDLER-CASE is here mostly to stop output immediately
- ;; (and fall through to QUIT) when there's an I/O error. Thus,
- ;; when we're run under a shell script or something, we can die
- ;; cleanly when the script dies (and our pipes are cut), instead
- ;; of falling into ldb or something messy like that.
- (handler-case
- (progn
- (format *error-output*
- "~&~@<unhandled condition (of type ~S): ~2I~_~A~:>~2%"
- (type-of condition)
- condition)
- ;; Flush *ERROR-OUTPUT* even before the BACKTRACE, so that
- ;; even if we hit an error within BACKTRACE (e.g. a bug in
- ;; the debugger's own frame-walking code, or a bug in a user
- ;; PRINT-OBJECT method) we'll at least have the CONDITION
- ;; printed out before we die.
- (finish-output *error-output*)
- ;; (Where to truncate the BACKTRACE is of course arbitrary, but
- ;; it seems as though we should at least truncate it somewhere.)
- (sb!debug:backtrace 128 *error-output*)
- (format
- *error-output*
- "~%unhandled condition in --disable-debugger mode, quitting~%")
- (finish-output *error-output*)
- (failure-quit))
- (condition ()
- ;; We IGNORE-ERRORS here because even %PRIMITIVE PRINT can
- ;; fail when our output streams are blown away, as e.g. when
- ;; we're running under a Unix shell script and it dies somehow
- ;; (e.g. because of a SIGINT). In that case, we might as well
- ;; just give it up for a bad job, and stop trying to notify
- ;; the user of anything.
- ;;
- ;; Actually, the only way I've run across to exercise the
- ;; problem is to have more than one layer of shell script.
- ;; I have a shell script which does
- ;; time nice -10 sh make.sh "$1" 2>&1 | tee make.tmp
- ;; and the problem occurs when I interrupt this with Ctrl-C
- ;; under Linux 2.2.14-5.0 and GNU bash, version 1.14.7(1).
- ;; I haven't figured out whether it's bash, time, tee, Linux, or
- ;; what that is responsible, but that it's possible at all
- ;; means that we should IGNORE-ERRORS here. -- WHN 2001-04-24
- (ignore-errors
- (%primitive print
- "Argh! error within --disable-debugger error handling"))
- (failure-quit :recklessly-p t)))))
+ (loop
+ (unwind-protect
+ (progn
+ ;; (See comment preceding the definition of SCRUB-CONTROL-STACK.)
+ (scrub-control-stack)
+ (sb!thread::get-foreground)
+ (unless noprint
+ (flush-standard-output-streams)
+ (funcall *repl-prompt-fun* *standard-output*)
+ ;; (Should *REPL-PROMPT-FUN* be responsible for doing its own
+ ;; FORCE-OUTPUT? I can't imagine a valid reason for it not to
+ ;; be done here, so leaving it up to *REPL-PROMPT-FUN* seems
+ ;; odd. But maybe there *is* a valid reason in some
+ ;; circumstances? perhaps some deadlock issue when being driven
+ ;; by another process or something...)
+ (force-output *standard-output*))
+ (let* ((form (funcall *repl-read-form-fun*
+ *standard-input*
+ *standard-output*))
+ (results (multiple-value-list (interactive-eval form))))
+ (unless noprint
+ (dolist (result results)
+ (fresh-line)
+ (prin1 result)))))
+ ;; If we started stepping in the debugger we want to stop now.
+ (disable-stepping))))
\f
;;; a convenient way to get into the assembly-level debugger
(defun %halt ()
projects / sbcl.git / blobdiff