(progn
(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 #!+(or x86 x86-64) *pseudo-atomic-atomic*
- #!+(or x86 x86-64) *pseudo-atomic-interrupted*
- sb!unix::*interrupts-enabled*
- sb!unix::*interrupt-pending*
+(declaim (special #!+(or x86 x86-64) *pseudo-atomic-bits*
+ *allow-with-interrupts*
+ *interrupts-enabled*
+ *interrupt-pending*
*type-system-initialized*))
(defvar *cold-init-complete-p*)
(defvar *maximum-error-depth*)
(defvar *current-error-depth*)
-;;;; stepping control
-(defvar *step*)
-(defvar *stepping*)
-(defvar *step-form-stack* nil
- "A place for single steppers to push information about
-STEP-FORM-CONDITIONS avaiting the corresponding
-STEP-VALUES-CONDITIONS. The system is guaranteed to empty the stack
-when stepping terminates, so that it remains in sync, but doesn't
-modify it in any other way: it is provided for implmentors of single
-steppers to maintain contextual information.")
+;;;; 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
(with-unique-names (caught)
`(let ((,caught (catch '%end-of-the-world
(/show0 "inside CATCH '%END-OF-THE-WORLD")
- ,@body)))
+ (unwind-protect
+ (progn ,@body)
+ (call-hooks "exit" *exit-hooks*)))))
(/show0 "back from CATCH '%END-OF-THE-WORLD, flushing output")
(flush-standard-output-streams)
(sb!thread::terminate-session)
\f
;;;; miscellaneous external functions
-(defun sleep (n)
+(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-arguments (list seconds)
+ :datum seconds
:expected-type '(real 0)))
+ #!-win32
(multiple-value-bind (sec nsec)
- (if (integerp n)
- (values n 0)
+ (if (integerp seconds)
+ (values seconds 0)
(multiple-value-bind (sec frac)
- (truncate n)
+ (truncate seconds)
(values sec (truncate frac 1e-9))))
+ ;; 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))
+ #!+win32
+ (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:fixnumize 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-word 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-word ptr offset))
- (look ptr (+ offset sb!vm:n-word-bytes) count))
- (t
- (scrub ptr offset (+ count sb!vm:n-word-bytes))))))
- (declare (type sb!vm::word 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:fixnumize 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-word 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 sb!vm::word 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)
(unwind-protect
- (let ((results (multiple-value-list (eval form))))
+ (let ((results (multiple-value-list (funcall eval form))))
(setf /// //
// /
/ results
(force-output (symbol-value name)))
(values))
-(defun process-init-file (truename)
- (when truename
- (restart-case
- (with-open-file (s truename :if-does-not-exist nil)
- (flet ((next ()
- (let ((form (read s nil s)))
- (if (eq s form)
+(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*)))
+ (flet ((process-stream (stream pathname)
+ (with-simple-restart (abort "Skip rest of ~A file ~S."
+ context (native-namestring pathname))
+ (loop
+ (with-simple-restart
+ (continue "Ignore error and continue processing ~A file ~S."
+ context (native-namestring pathname))
+ (let ((form (read stream nil stream)))
+ (if (eq stream form)
(return-from process-init-file nil)
- (eval form)))))
- (loop
- (restart-case
- (handler-bind ((error (lambda (e)
- (error
- "Error during processing of ~
- initialization file ~A:~%~% ~A"
- truename e))))
- (next))
- (continue ()
- :report "Ignore and continue processing.")))))
- (abort ()
- :report "Skip rest of initialization file."))))
-
-(defun process-eval-options (eval-strings-or-forms)
- (/show0 "handling --eval options")
- (flet ((process-1 (string-or-form)
- (etypecase string-or-form
- (string
- (multiple-value-bind (expr pos) (read-from-string string-or-form)
- (unless (eq string-or-form
- (read-from-string string-or-form nil string-or-form
- :start pos))
- (error "More than one expression in ~S" string-or-form))
- (eval expr)
- (flush-standard-output-streams)))
- (cons (eval string-or-form) (flush-standard-output-streams)))))
- (restart-case
- (dolist (expr-as-string-or-form eval-strings-or-forms)
- (/show0 "handling one --eval option")
- (restart-case
- (handler-bind
- ((error (lambda (e)
- (error "Error during processing of --eval ~
- option ~S:~%~% ~A"
- expr-as-string-or-form e))))
- (process-1 expr-as-string-or-form))
- (continue ()
- :report "Ignore and continue with next --eval option.")))
- (abort ()
- :report "Skip rest of --eval options."))))
+ (eval form))))))))
+ (if specified-pathname
+ (with-open-file (stream (parse-native-namestring specified-pathname)
+ :if-does-not-exist nil)
+ (if stream
+ (process-stream stream (pathname stream))
+ (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
+ (process-stream stream (pathname stream))))))))))
+
+(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))))))
+ (flush-standard-output-streams)))
+ (with-simple-restart (abort "Skip rest of --eval and --load options.")
+ (dolist (option options)
+ (process-1 option)))))
+
+;; Errors while processing the command line cause the system to QUIT,
+;; 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)
+ (quit :unix-status 1))
;;; the default system top level function
(defun toplevel-init ()
(/show0 "entering TOPLEVEL-INIT")
- (let (;; value of --sysinit option
+ (let ( ;; value of --sysinit option
(sysinit nil)
+ ;; t if --no-sysinit option given
+ (no-sysinit nil)
;; value of --userinit option
(userinit nil)
- ;; values of --eval options, in reverse order; and also any
- ;; other options (like --load) which're translated into --eval
- ;;
- ;; The values 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,
- ;; except for forms transformed from syntactically-sugary
- ;; switches like --load and --disable-debugger.
- (reversed-evals 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)
;; everything in *POSIX-ARGV* except for argv[0]=programname
(options (rest *posix-argv*)))
;; reasonably.
;; Process command line options.
- (flet (;; Errors while processing the command line cause the system
- ;; to QUIT, 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.
- (startup-error (control-string &rest args)
- (format
- *error-output*
- "fatal error before reaching READ-EVAL-PRINT loop: ~% ~?~%"
- control-string
- args)
- (quit :unix-status 1)))
- (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)
- (startup-error
- "unexpected end of command line options"))))
- (cond ((string= option "--sysinit")
- (pop-option)
- (if sysinit
- (startup-error "multiple --sysinit options")
- (setf sysinit (pop-option))))
- ((string= option "--userinit")
- (pop-option)
- (if userinit
- (startup-error "multiple --userinit options")
- (setf userinit (pop-option))))
- ((string= option "--eval")
- (pop-option)
- (push (pop-option) reversed-evals))
- ((string= option "--load")
- (pop-option)
- (push
- (list 'cl:load (native-pathname (pop-option)))
- reversed-evals))
- ((string= option "--noprint")
- (pop-option)
- (setf noprint t))
- ((string= option "--disable-debugger")
- (pop-option)
- (push (list 'sb!ext: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=)
- (startup-error "bad toplevel option: ~S"
- (first options))
- (return)))))))
- (/show0 "done with LOOP WHILE OPTIONS DO in TOPLEVEL-INIT")
-
- ;; Delete all the options that we processed, so that only
- ;; user-level options are left visible to user code.
- (setf (rest *posix-argv*) options)
-
- ;; Handle initialization files.
- (/show0 "handling initialization files in TOPLEVEL-INIT")
- (flet (;; shared idiom for searching for SYSINITish and
- ;; USERINITish files
- (probe-init-files (explicitly-specified-init-file-name
- &rest default-init-file-names)
- (declare (type list default-init-file-names))
- (if explicitly-specified-init-file-name
- (or (probe-file explicitly-specified-init-file-name)
- (startup-error "The file ~S was not found."
- explicitly-specified-init-file-name))
- (find-if (lambda (x)
- (and (stringp x) (probe-file x)))
- default-init-file-names)))
- ;; shared idiom for creating default names for
- ;; SYSINITish and USERINITish files
- (init-file-name (maybe-dir-name basename)
- (and maybe-dir-name
- (concatenate 'string maybe-dir-name "/" basename))))
- (let ((sysinit-truename
- #!-win32 (probe-init-files sysinit
- (init-file-name (posix-getenv "SBCL_HOME")
- "sbclrc")
- "/etc/sbclrc"))
- (userinit-truename
- #!-win32 (probe-init-files userinit
- (init-file-name (posix-getenv "HOME")
- ".sbclrc"))))
-
- ;; 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
- (process-init-file sysinit-truename)
- (process-init-file userinit-truename)
- (process-eval-options (reverse reversed-evals)))
- (abort ()
- :report "Skip 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")))))
+ (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)
+ (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 (pop-option))
+ (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 "--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")
+
+ ;; Delete all the options that we processed, so that only
+ ;; user-level options are left visible to user code.
+ (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")
+ ;; 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))
+ (process-eval/load-options (nreverse reversed-options))
+ (when script
+ (load-script (native-pathname 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)
+ (quit ()
+ :report "Quit SBCL (calling #'QUIT, killing the process)."
+ :test (lambda (c) (declare (ignore c)) (not script))
+ (/show0 "falling through to QUIT from pre-REPL RESTART-CASE")
+ (quit :unix-status 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
- "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.")
+ #!+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
- "a function of one argument STREAM for the toplevel REPL to call: Prompt
- the user for input.")
+ #!+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)
- "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.")
+ #!+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)
;; most CL specials (most critically *PACKAGE*).
(with-rebound-io-syntax
(handler-bind ((step-condition 'invoke-stepper))
- (let ((*stepping* nil)
- (*step* nil))
- (loop
+ (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
- #!-win32 (sb!unix::reset-signal-mask)
- ;; 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)
- (funcall repl-fun noprint)
- (critically-unreachable "after 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)))
(if (eq form eof-marker)
(fresh-line)
(prin1 result)))))
;; If we started stepping in the debugger we want to stop now.
- (setf *stepping* nil
- *step* nil))))
+ (disable-stepping))))
\f
;;; a convenient way to get into the assembly-level debugger
(defun %halt ()
projects / sbcl.git / blobdiff