X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Fcold-error.lisp;h=429516038c2571b6029279e54912ef916204ff84;hb=4898ef32c639b1c7f4ee13a5ba566ce6debd03e6;hp=768551acf63412177fa1be92e599e7d3615849a5;hpb=db55ad022ec7cc7a2f251918579fdeba7f17dbe0;p=sbcl.git diff --git a/src/code/cold-error.lisp b/src/code/cold-error.lisp index 768551a..4295160 100644 --- a/src/code/cold-error.lisp +++ b/src/code/cold-error.lisp @@ -23,50 +23,58 @@ (TYPEP condition *BREAK-ON-SIGNALS*) is true, the debugger is invoked before any signalling is done." (let ((condition (coerce-to-condition datum - arguments - 'simple-condition - 'signal)) - (*handler-clusters* *handler-clusters*)) - (let ((old-bos *break-on-signals*) - (*break-on-signals* nil)) - (when (typep condition old-bos) - (break "~A~%BREAK was entered because of *BREAK-ON-SIGNALS* (now NIL)." - condition))) + arguments + 'simple-condition + 'signal)) + (*handler-clusters* *handler-clusters*) + (old-bos *break-on-signals*)) + (restart-case + (when (typep condition *break-on-signals*) + (let ((*break-on-signals* nil)) + (break "~A~%BREAK was entered because of *BREAK-ON-SIGNALS* ~ + (now rebound to NIL)." + condition))) + ;; Give the user a chance to unset *BREAK-ON-SIGNALS* on the + ;; way out. + ;; + ;; (e.g.: Consider a long compilation. After a failed compile + ;; the user sets *BREAK-ON-SIGNALS* to T, and select the + ;; RECOMPILE restart. Once the user diagnoses and fixes the + ;; problem, he selects RECOMPILE again... and discovers that + ;; he's entered the *BREAK-ON-SIGNALS* hell with no escape, + ;; unless we provide this restart.) + (reassign (new-value) + :report + "Return from BREAK and assign a new value to *BREAK-ON-SIGNALS*." + :interactive + (lambda () + (let (new-value) + (loop + (format *query-io* + "Enter new value for *BREAK-ON-SIGNALS*. ~ + Current value is ~S.~%~ + > " + old-bos) + (force-output *query-io*) + (let ((*break-on-signals* nil)) + (setf new-value (eval (read *query-io*))) + (if (typep new-value 'type-specifier) + (return) + (format *query-io* + "~S is not a valid value for *BREAK-ON-SIGNALS* ~ + (must be a type-specifier).~%" + new-value)))) + (list new-value))) + (setf *break-on-signals* new-value))) (loop - (unless *handler-clusters* (return)) + (unless *handler-clusters* + (return)) (let ((cluster (pop *handler-clusters*))) - (dolist (handler cluster) - (when (typep condition (car handler)) - (funcall (cdr handler) condition))))) + (dolist (handler cluster) + (when (typep condition (car handler)) + (funcall (cdr handler) condition))))) nil)) -;;; COERCE-TO-CONDITION is used in SIGNAL, ERROR, CERROR, WARN, and -;;; INVOKE-DEBUGGER for parsing the hairy argument conventions into a -;;; single argument that's directly usable by all the other routines. -(defun coerce-to-condition (datum arguments default-type function-name) - (cond ((typep datum 'condition) - (if arguments - (cerror "Ignore the additional arguments." - 'simple-type-error - :datum arguments - :expected-type 'null - :format-control "You may not supply additional arguments ~ - when giving ~S to ~S." - :format-arguments (list datum function-name))) - datum) - ((symbolp datum) ; roughly, (SUBTYPEP DATUM 'CONDITION) - (apply #'make-condition datum arguments)) - ((or (stringp datum) (functionp datum)) - (make-condition default-type - :format-control datum - :format-arguments arguments)) - (t - (error 'simple-type-error - :datum datum - :expected-type '(or symbol string) - :format-control "bad argument to ~S: ~S" - :format-arguments (list function-name datum))))) - ;;; a shared idiom in ERROR, CERROR, and BREAK: The user probably ;;; doesn't want to hear that the error "occurred in" one of these ;;; functions, so we try to point the top of the stack to our caller @@ -74,52 +82,57 @@ (eval-when (:compile-toplevel :execute) (defmacro-mundanely maybe-find-stack-top-hint () `(or sb!debug:*stack-top-hint* - (nth-value 1 (sb!kernel:find-caller-name-and-frame))))) + (nth-value 1 (find-caller-name-and-frame))))) (defun error (datum &rest arguments) #!+sb-doc - "Invoke the signal facility on a condition formed from datum and arguments. - If the condition is not handled, the debugger is invoked." + "Invoke the signal facility on a condition formed from DATUM and ARGUMENTS. + If the condition is not handled, the debugger is invoked." (/show0 "entering ERROR, argument list=..") (/hexstr arguments) - (/show0 "printing ERROR arguments one by one..") + + (/show0 "cold-printing ERROR arguments one by one..") #!+sb-show (dolist (argument arguments) - (sb!impl::cold-print argument)) - (sb!kernel:infinite-error-protect + (sb!impl::cold-print argument)) + (/show0 "done cold-printing ERROR arguments") + + (infinite-error-protect (let ((condition (coerce-to-condition datum arguments - 'simple-error 'error)) - (sb!debug:*stack-top-hint* (maybe-find-stack-top-hint))) + 'simple-error 'error)) + (sb!debug:*stack-top-hint* (maybe-find-stack-top-hint))) + (/show0 "done coercing DATUM to CONDITION") (let ((sb!debug:*stack-top-hint* nil)) - (signal condition)) + (/show0 "signalling CONDITION from within ERROR") + (signal condition)) + (/show0 "done signalling CONDITION within ERROR") (invoke-debugger condition)))) (defun cerror (continue-string datum &rest arguments) - (sb!kernel:infinite-error-protect + (infinite-error-protect (with-simple-restart - (continue "~A" (apply #'format nil continue-string arguments)) - (let ((condition (if (typep datum 'condition) - datum - (coerce-to-condition datum - arguments - 'simple-error - 'error))) - (sb!debug:*stack-top-hint* (maybe-find-stack-top-hint))) - (with-condition-restarts condition (list (find-restart 'continue)) - (let ((sb!debug:*stack-top-hint* nil)) - (signal condition)) - (invoke-debugger condition))))) + (continue "~A" (apply #'format nil continue-string arguments)) + (let ((condition (coerce-to-condition datum + arguments + 'simple-error + 'cerror)) + (sb!debug:*stack-top-hint* (maybe-find-stack-top-hint))) + (with-condition-restarts condition (list (find-restart 'continue)) + (let ((sb!debug:*stack-top-hint* nil)) + (signal condition)) + (invoke-debugger condition))))) nil) ;;; like BREAK, but without rebinding *DEBUGGER-HOOK* to NIL, so that ;;; we can use it in system code (e.g. in SIGINT handling) without -;;; messing up --noprogrammer mode (which works by setting -;;; *DEBUGGER-HOOK*) +;;; messing up --disable-debugger mode (which works by setting +;;; *DEBUGGER-HOOK*); or for that matter, without messing up ordinary +;;; applications which try to do similar things with *DEBUGGER-HOOK* (defun %break (what &optional (datum "break") &rest arguments) - (sb!kernel:infinite-error-protect + (infinite-error-protect (with-simple-restart (continue "Return from ~S." what) (let ((sb!debug:*stack-top-hint* (maybe-find-stack-top-hint))) - (invoke-debugger - (coerce-to-condition datum arguments 'simple-condition what))))) + (invoke-debugger + (coerce-to-condition datum arguments 'simple-condition what))))) nil) (defun break (&optional (datum "break") &rest arguments) @@ -128,13 +141,13 @@ of condition handling occurring." (let ((*debugger-hook* nil)) ; as specifically required by ANSI (apply #'%break 'break datum arguments))) - + (defun warn (datum &rest arguments) #!+sb-doc "Warn about a situation by signalling a condition formed by DATUM and ARGUMENTS. While the condition is being signaled, a MUFFLE-WARNING restart exists that causes WARN to immediately return NIL." - (/noshow0 "entering WARN") + (/show0 "entering WARN") ;; KLUDGE: The current cold load initialization logic causes several calls ;; to WARN, so we need to be able to handle them without dying. (And calling ;; FORMAT or even PRINC in cold load is a good way to die.) Of course, the @@ -142,22 +155,29 @@ ;; -- WHN 19991009 (if (not *cold-init-complete-p*) (progn - (/show0 "ignoring WARN in cold init, arguments=..") - #!+sb-show (dolist (argument arguments) - (sb!impl::cold-print argument))) - (sb!kernel:infinite-error-protect + (/show0 "ignoring WARN in cold init, arguments=..") + #!+sb-show (dolist (argument arguments) + (sb!impl::cold-print argument))) + (infinite-error-protect + (/show0 "doing COERCE-TO-CONDITION") (let ((condition (coerce-to-condition datum arguments - 'simple-warning 'warn))) - (enforce-type condition warning) - (restart-case (signal condition) - (muffle-warning () - :report "Skip warning." - (return-from warn nil))) - (let ((badness (etypecase condition - (style-warning 'style-warning) - (warning 'warning)))) - (format *error-output* - "~&~@<~S: ~3i~:_~A~:>~%" - badness - condition))))) + 'simple-warning 'warn))) + (/show0 "back from COERCE-TO-CONDITION, doing ENFORCE-TYPE") + (enforce-type condition warning) + (/show0 "back from ENFORCE-TYPE, doing RESTART-CASE MUFFLE-WARNING") + (restart-case (signal condition) + (muffle-warning () + :report "Skip warning." + (return-from warn nil))) + (/show0 "back from RESTART-CASE MUFFLE-WARNING (i.e. normal return)") + + (let ((badness (etypecase condition + (style-warning 'style-warning) + (warning 'warning)))) + (/show0 "got BADNESS, calling FORMAT") + (format *error-output* + "~&~@<~S: ~3i~:_~A~:>~%" + badness + condition) + (/show0 "back from FORMAT, voila!"))))) nil)