;;; 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*)
(defvar *free-interrupt-context-index*))
\f
;;; specials initialized by !COLD-INIT
;;; FIXME: These could be converted to DEFVARs.
(declaim (special *gc-inhibit* *need-to-collect-garbage*
- *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*))
+ *after-gc-hooks*
+ #!+(or x86 x86-64) *pseudo-atomic-atomic*
+ #!+(or x86 x86-64) *pseudo-atomic-interrupted*
+ sb!unix::*interrupts-enabled*
+ sb!unix::*interrupt-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*)
+
+;;;; 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.")
\f
;;;; miscellaneous utilities for working with with TOPLEVEL
(defmacro handling-end-of-the-world (&body body)
(with-unique-names (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))))
+ (/show0 "inside CATCH '%END-OF-THE-WORLD")
+ ,@body)))
+ (/show0 "back from CATCH '%END-OF-THE-WORLD, flushing output")
+ (flush-standard-output-streams)
+ (sb!thread::terminate-session)
+ (/show0 "calling UNIX-EXIT")
+ (sb!unix:unix-exit ,caught))))
\f
;;;; working with *CURRENT-ERROR-DEPTH* and *MAXIMUM-ERROR-DEPTH*
(/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. "
- "SB-KERNEL:*MAXIMUM-ERROR-DEPTH* exceeded.")
- t)
- (t
- (/show0 "returning normally from INFINITE-ERROR-PROTECTOR")
- 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)))
;;; FIXME: I had a badly broken version of INFINITE-ERROR-PROTECTOR at
;;; one point (shown below), and SBCL cross-compiled it without
#|
(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. "
- "SB-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 "in INFINITE-ERROR-PROTECTOR, calling ERROR-ERROR")
+ (error-error "Help! "
+ *current-error-depth*
+ " nested errors. "
+ "SB-KERNEL:*MAXIMUM-ERROR-DEPTH* exceeded.")
+ (progn ,@forms)
+ t)
+ (t
+ (/show0 "in INFINITE-ERROR-PROTECTOR, returning normally")
+ nil)))
|#
\f
;;;; miscellaneous external functions
"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))
+ (minusp n))
(error 'simple-type-error
:format-control "invalid argument to SLEEP: ~S"
:format-arguments (list n)
:datum n
:expected-type '(real 0)))
- (multiple-value-bind (sec usec)
+ (multiple-value-bind (sec nsec)
(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))
+ (values n 0)
+ (multiple-value-bind (sec frac)
+ (truncate n)
+ (values sec (truncate frac 1e-9))))
+ (sb!unix:nanosleep sec nsec))
nil)
\f
;;;; SCRUB-CONTROL-STACK
(defun scrub-control-stack ()
(declare (optimize (speed 3) (safety 0))
- (values (unsigned-byte 20))) ; FIXME: DECLARE VALUES?
+ (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*)))
+ (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-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 (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)))
+ (* (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))))
+ (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-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 (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))))
+ (* (floor initial-offset sb!vm:n-word-bytes) sb!vm:n-word-bytes)
+ 0))))
\f
;;;; the default toplevel function
"Evaluate FORM, returning whatever it returns and adjusting ***, **, *,
+++, ++, +, ///, //, /, and -."
(setf - form)
- (let ((results
- (multiple-value-list
- (eval-in-lexenv form
- (make-null-interactive-lexenv)))))
+ (let ((results (multiple-value-list (eval form))))
(setf /// //
- // /
- / results
- *** **
- ** *
- * (car results)))
+ // /
+ / 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*))
+ *error-output*
+ *query-io*
+ *standard-output*
+ *trace-output*))
(finish-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)
+ (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)
+ (/show0 "handling --eval options")
+ (flet ((process-1 (string)
+ (multiple-value-bind (expr pos) (read-from-string string)
+ (unless (eq string (read-from-string string nil string :start pos))
+ (error "More the one expression in ~S" string))
+ (eval expr)
+ (flush-standard-output-streams))))
+ (restart-case
+ (dolist (expr-as-string eval-strings)
+ (/show0 "handling one --eval option")
+ (restart-case
+ (handler-bind ((error (lambda (e)
+ (error "Error during processing of --eval ~
+ option ~S:~%~% ~A"
+ expr-as-string e))))
+ (process-1 expr-as-string))
+ (continue ()
+ :report "Ignore and continue with next --eval option.")))
+ (abort ()
+ :report "Skip rest of --eval options."))))
+
;;; the default system top level function
(defun toplevel-init ()
-
(/show0 "entering TOPLEVEL-INIT")
- (setf sb!thread::*session-lock* (sb!thread:make-mutex :name "the terminal"))
- (sb!thread::get-foreground)
(let (;; value of --sysinit option
- (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.
- (reversed-evals nil)
- ;; Has a --noprint option been seen?
- (noprint nil)
- ;; everything in *POSIX-ARGV* except for argv[0]=programname
- (options (rest *posix-argv*)))
+ (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.
+ (reversed-evals nil)
+ ;; Has a --noprint option been seen?
+ (noprint 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.
- (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)
- (push (pop-option) reversed-evals))
- ((string= option "--load")
- (pop-option)
- (push
- ;; FIXME: see BUG 296
- (concatenate 'string "(|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 "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 (;; 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 (expr-as-string (reverse reversed-evals))
- (/show0 "handling one --eval option in TOPLEVEL-INIT")
- (let ((expr (with-input-from-string (eval-stream
- expr-as-string)
- (let* ((eof-marker (cons :eof :eof))
- (result (read eval-stream nil eof-marker))
- (eof (read eval-stream nil eof-marker)))
- (cond ((eq result eof-marker)
- (error "unable to parse ~S"
- expr-as-string))
- ((not (eq eof eof-marker))
- (error "more than one expression in ~S"
- expr-as-string))
- (t
- result))))))
- (eval expr)
- (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"))))
+ ;; 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
+ ;; FIXME: see BUG 296
+ (concatenate 'string "(|LOAD| \"" (pop-option) "\")")
+ reversed-evals))
+ ((string= option "--noprint")
+ (pop-option)
+ (setf noprint t))
+ ((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=)
+ (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
+ (probe-init-files sysinit
+ (init-file-name (posix-getenv "SBCL_HOME")
+ "sbclrc")
+ "/etc/sbclrc"))
+ (userinit-truename
+ (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")))))
+
+;;; 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.")
+(defvar *repl-prompt-fun* #'repl-prompt-fun
+ "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.")
;;; 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)
- (funcall *repl-fun* 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))
+ (let ((*stepping* nil)
+ (*step* nil))
+ (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
+ (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"))))))))))
;;; Our default REPL prompt is the minimal traditional one.
(defun repl-prompt-fun (stream)
(defun repl-read-form-fun (in out)
(declare (type stream in out) (ignore out))
(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.")
-(defvar *repl-fun* #'repl-fun
- "a function of one argument NOPRINT that provides the REPL for the system.
- Assumes that *standard-input* and *standard-output* are setup.")
+ (quit)
+ form)))
(defun repl-fun (noprint)
(/show0 "entering REPL")
(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))))))
+ (unwind-protect
+ (progn
+ ;; (See comment preceding the definition of SCRUB-CONTROL-STACK.)
+ (scrub-control-stack)
+ (sb!thread::get-foreground)
+ (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)))))
+ ;; If we started stepping in the debugger we want to stop now.
+ (setf *stepping* nil
+ *step* nil))))
\f
;;; a convenient way to get into the assembly-level debugger
(defun %halt ()
projects / sbcl.git / blobdiff