X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Ftoplevel.lisp;h=97199dbbc781dd0c97dd8e92444e9ca412d84ac7;hb=3fe9cb03ffeed767e9d795b5bfcd70eb71aedde9;hp=607113183f93100c75a3c2ce301e196bb4ee0974;hpb=db97ea04895820f70c90bdeb0399aa0229410b5d;p=sbcl.git diff --git a/src/code/toplevel.lisp b/src/code/toplevel.lisp index 6071131..97199db 100644 --- a/src/code/toplevel.lisp +++ b/src/code/toplevel.lisp @@ -30,6 +30,7 @@ *allow-with-interrupts* *interrupts-enabled* *interrupt-pending* + #!+sb-thruption *thruption-pending* *type-system-initialized*)) (defvar *cold-init-complete-p*) @@ -56,16 +57,17 @@ (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.") + "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.") + "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.") ;;;; miscellaneous utilities for working with with TOPLEVEL @@ -74,17 +76,50 @@ command-line.") ;;; by QUIT) is caught and any final processing and return codes are ;;; handled appropriately. (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") - (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) - (/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))))))) ;;;; working with *CURRENT-ERROR-DEPTH* and *MAXIMUM-ERROR-DEPTH* @@ -96,7 +131,7 @@ command-line.") (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 @@ -124,158 +159,62 @@ command-line.") (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. " - "SB-KERNEL:*MAXIMUM-ERROR-DEPTH* exceeded.") - (progn ,@forms) - t) - (t - (/show0 "in INFINITE-ERROR-PROTECTOR, returning normally") - nil))) -|# ;;;; miscellaneous external functions -(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))) - #!-win32 + #!-(and win32 (not sb-thread)) (multiple-value-bind (sec nsec) - (if (integerp n) - (values n 0) - (multiple-value-bind (sec frac) - (truncate n) - (values sec (truncate frac 1e-9)))) + (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)) - #!+win32 - (sb!win32:millisleep (truncate (* n 1000))) + #!+(and win32 (not sb-thread)) + (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*)) - (* 2 sb!c:*backend-page-bytes*)))) - (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*)) - (* 2 sb!c:*backend-page-bytes*))) - (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 @@ -319,16 +258,41 @@ command-line.") ;;; 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* - *terminal-io*)) - ;; FINISH-OUTPUT may block more easily than FORCE-OUTPUT - (force-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 @@ -336,30 +300,19 @@ command-line.") (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)))))))))) + (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") @@ -377,37 +330,41 @@ command-line.") (:load (with-simple-restart (continue "Ignore runtime option --load ~S." value) - (load (native-pathname 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))))) -;;; Skips past the shebang line on stream, if any. -(defun maybe-skip-shebang-line (stream) - (let ((p (file-position stream))) - (flet ((next () (read-byte stream nil))) - (unwind-protect - (when (and (eq (next) (char-code #\#)) - (eq (next) (char-code #\!))) - (setf p nil) - (loop for x = (next) - until (or (not x) (eq x (char-code #\newline))))) - (when p - (file-position stream p)))) - t)) - (defun process-script (script) - (let ((pathname (native-pathname script)) - (ok nil)) - (unwind-protect - (with-open-file (f pathname :element-type :default) - (maybe-skip-shebang-line f) - (load f :verbose nil :print nil) - (setf ok t)) - (quit :unix-status (if ok 0 1))))) - -;; Errors while processing the command line cause the system to QUIT, + (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 @@ -417,7 +374,7 @@ command-line.") "fatal error before reaching READ-EVAL-PRINT loop: ~% ~?~%" control-string args) - (quit :unix-status 1)) + (exit :code 1)) ;;; the default system top level function (defun toplevel-init () @@ -443,6 +400,8 @@ command-line.") (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*))) @@ -469,7 +428,7 @@ command-line.") (setf disable-debugger t no-userinit t no-sysinit t - script (pop-option)) + script (if options (pop-option) t)) (return)) ((string= option "--sysinit") (pop-option) @@ -499,6 +458,16 @@ command-line.") ((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)) @@ -522,7 +491,8 @@ command-line.") ;; 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 @@ -551,6 +521,8 @@ command-line.") (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) @@ -565,11 +537,11 @@ command-line.") s)) (/show0 "CONTINUEing from pre-REPL RESTART-CASE") (values)) ; (no-op, just fall through) - (quit () - :report "Quit SBCL (calling #'QUIT, killing the process)." + (exit () + :report "Exit SBCL (calling #'EXIT, 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)))) + (/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 @@ -625,7 +597,7 @@ that provides the REPL for the system. Assumes that *STANDARD-INPUT* and ;; 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"))))))))) @@ -646,7 +618,7 @@ that provides the REPL for the system. Assumes that *STANDARD-INPUT* and (let* ((eof-marker (cons nil nil)) (form (read in nil eof-marker))) (if (eq form eof-marker) - (quit) + (exit) form))) (defun repl-fun (noprint)