X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Ftoplevel.lisp;h=0868844ad82e64b6d1b1739742cb72695b1fb62a;hb=ad4fd20de698fe853fb8aec3d49e51e369771b31;hp=ef3f1736afab343792688065c2717f3236a84928;hpb=fb8e5ded0b56f50de2024efbcc9ce68b401415f5;p=sbcl.git diff --git a/src/code/toplevel.lisp b/src/code/toplevel.lisp index ef3f173..0868844 100644 --- a/src/code/toplevel.lisp +++ b/src/code/toplevel.lisp @@ -20,14 +20,16 @@ (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*)) ;;; specials initialized by !COLD-INIT ;;; FIXME: These could be converted to DEFVARs. (declaim (special #!+(or x86 x86-64) *pseudo-atomic-bits* - sb!unix::*interrupts-enabled* - sb!unix::*interrupt-pending* + *allow-with-interrupts* + *interrupts-enabled* + *interrupt-pending* *type-system-initialized*)) (defvar *cold-init-complete-p*) @@ -75,7 +77,9 @@ command-line.") (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) @@ -152,125 +156,35 @@ command-line.") ;;;; 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 (* n 1000))) + (sb!win32:millisleep (truncate (* seconds 1000))) nil) -;;;; 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 - (- (sap-int (sb!di::descriptor-sap 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 (+ (sap-int (sb!di::descriptor-sap 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)))) - ;;;; the default toplevel function (defvar / nil @@ -286,13 +200,13 @@ command-line.") (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 -." (setf - form) (unwind-protect - (let ((results (multiple-value-list (eval form)))) + (let ((results (multiple-value-list (funcall eval form)))) (setf /// // // / / results @@ -324,65 +238,67 @@ command-line.") (force-output (symbol-value name))) (values)) -(defun process-init-file (specified-pathname default-function) - (restart-case - (let ((cookie (list))) - (flet ((process-stream (stream &optional pathname) - (loop - (restart-case - (handler-bind - ((error (lambda (e) - (error "Error during processing of ~ - initialization file ~A:~%~% ~A" - (or pathname stream) e)))) - (let ((form (read stream nil cookie))) - (if (eq cookie form) - (return-from process-init-file nil) - (eval form)))) - (continue () - :report "Ignore and continue processing."))))) - (if specified-pathname - (with-open-file (stream (parse-native-namestring specified-pathname) - :if-does-not-exist nil) - (if stream - (process-stream stream (pathname stream)) - (error "The specified init file ~S was not found." - 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))))))))) - (abort () - :report "Skip this 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.")))) +(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)))))))) + (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))))) + +(defun process-script (script) + (let ((pathname (native-pathname script))) + (handling-end-of-the-world + (with-open-file (f pathname :element-type :default) + (sb!fasl::maybe-skip-shebang-line f) + (load f :verbose nil :print nil) + (quit))))) ;; Errors while processing the command line cause the system to QUIT, ;; instead of trying to go into the Lisp debugger, because trying to @@ -407,18 +323,19 @@ command-line.") (userinit nil) ;; t if --no-userinit option given (no-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 --disable-debugger option given + (disable-debugger nil) + ;; list of ( . ) 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*))) @@ -440,7 +357,14 @@ command-line.") (pop options) (startup-error "unexpected end of command line options")))) - (cond ((string= option "--sysinit") + (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") @@ -458,18 +382,16 @@ command-line.") (setf no-userinit t)) ((string= option "--eval") (pop-option) - (push (pop-option) reversed-evals)) + (push (cons :eval (pop-option)) reversed-options)) ((string= option "--load") (pop-option) - (push - (list 'cl:load (native-pathname (pop-option))) - reversed-evals)) + (push (cons :load (pop-option)) reversed-options)) ((string= option "--noprint") (pop-option) (setf noprint t)) ((string= option "--disable-debugger") (pop-option) - (push (list 'sb!ext:disable-debugger) reversed-evals)) + (setf disable-debugger t)) ((string= option "--end-toplevel-options") (pop-option) (return)) @@ -495,6 +417,10 @@ command-line.") ;; 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 @@ -515,16 +441,26 @@ command-line.") (restart-case (progn (unless no-sysinit - (process-init-file sysinit *sysinit-pathname-function*)) + (process-init-file sysinit :system)) (unless no-userinit - (process-init-file userinit *userinit-pathname-function*)) - (process-eval-options (nreverse reversed-evals))) + (process-init-file userinit :user)) + (process-eval/load-options (nreverse reversed-options)) + (when script + (process-script script) + (bug "PROCESS-SCRIPT returned"))) (abort () - :report "Skip to toplevel READ/EVAL/PRINT loop." + :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)))) @@ -578,12 +514,11 @@ that provides the REPL for the system. Assumes that *STANDARD-INPUT* and (with-simple-restart (abort "~@") (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. #!-win32 - (sb!kernel::protect-control-stack-guard-page 1) + (sb!kernel::reset-control-stack-guard-page) (funcall repl-fun noprint) (critically-unreachable "after REPL"))))))))) @@ -596,6 +531,11 @@ that provides the REPL for the system. Assumes that *STANDARD-INPUT* and ;;; 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)