#!+sb-doc
"This is T while in the debugger.")
-(defvar *debug-command-level* 0
- #!+sb-doc
- "Pushes and pops/exits inside the debugger change this.")
+;;; nestedness inside debugger command loops
+(defvar *debug-command-level* 0)
(defvar *stack-top-hint* nil
#!+sb-doc
(defvar *current-frame* nil)
-;;; the default for *DEBUG-PROMPT*
-(defun debug-prompt ()
- (let ((*standard-output* *debug-io*))
- (terpri)
- (prin1 (sb!di:frame-number *current-frame*))
- (dotimes (i *debug-command-level*) (princ "]"))
- (princ " ")
- (force-output)))
-
-(defparameter *debug-prompt* #'debug-prompt
- #!+sb-doc
- "a function of no arguments that prints the debugger prompt on *DEBUG-IO*")
-
+(defun debug-prompt (stream)
+
+ ;; old behavior, will probably go away in sbcl-0.7.x
+ (format stream "~%~D" (sb!di:frame-number *current-frame*))
+ (dotimes (i *debug-command-level*)
+ (write-char #\] stream))
+ (write-char #\space stream)
+
+ ;; planned new behavior, delayed since it will break ILISP
+ #+nil
+ (format stream
+ "~%~D~:[~;[~D~]] "
+ (sb!di:frame-number *current-frame*)
+ (> *debug-command-level* 1)
+ *debug-command-level*))
+
(defparameter *debug-help-string*
"The prompt is right square brackets, the number indicating how many
recursive command loops you are in.
(with-standard-io-syntax
(let* ((*debug-condition* condition)
(*debug-restarts* (compute-restarts condition))
- ;; FIXME: The next two bindings seem flaky, violating the
- ;; principle of least surprise. But in order to fix them,
- ;; we'd need to go through all the i/o statements in the
- ;; debugger, since a lot of them do their thing on
- ;; *STANDARD-INPUT* and *STANDARD-OUTPUT* instead of
- ;; *DEBUG-IO*.
- (*standard-input* *debug-io*) ; in case of setq
- (*standard-output* *debug-io*) ; '' '' '' ''
;; We want the i/o subsystem to be in a known, useful
;; state, regardless of where the debugger was invoked in
;; the program. WITH-STANDARD-IO-SYNTAX does some of that,
(*print-readably* nil)
(*print-pretty* t)
(*package* original-package))
- #!+sb-show (sb!conditions::show-condition *debug-condition*
- *error-output*)
+
+ ;; Before we start our own output, finish any pending output.
+ ;; Otherwise, if the user tried to track the progress of
+ ;; his program using PRINT statements, he'd tend to lose
+ ;; the last line of output or so, and get confused.
+ (flush-standard-output-streams)
+
+ ;; The initial output here goes to *ERROR-OUTPUT*, because the
+ ;; initial output is not interactive, just an error message,
+ ;; and when people redirect *ERROR-OUTPUT*, they could
+ ;; reasonably expect to see error messages logged there,
+ ;; regardless of what the debugger does afterwards.
(format *error-output*
- "~2&debugger invoked on ~S of type ~S:~% "
- '*debug-condition*
+ "~2&debugger invoked on condition of type ~S:~% "
(type-of *debug-condition*))
(princ-debug-condition-carefully *error-output*)
(terpri *error-output*)
- (let (;; FIXME: like the bindings of *STANDARD-INPUT* and
- ;; *STANDARD-OUTPUT* above..
+
+ ;; After the initial error/condition/whatever announcement to
+ ;; *ERROR-OUTPUT*, we become interactive, and should talk on
+ ;; *DEBUG-IO* from now on. (KLUDGE: This is a normative
+ ;; statement, not a description of reality.:-| There's a lot of
+ ;; older debugger code which was written to do i/o on whatever
+ ;; stream was in fashion at the time, and not all of it has
+ ;; been converted to behave this way. -- WHN 2000-11-16)
+ (let (;; FIXME: The first two bindings here seem wrong,
+ ;; violating the principle of least surprise, and making
+ ;; it impossible for the user to do reasonable things
+ ;; like using PRINT at the debugger prompt to send output
+ ;; to the program's ordinary (possibly
+ ;; redirected-to-a-file) *STANDARD-OUTPUT*, or using
+ ;; PEEK-CHAR or some such thing on the program's ordinary
+ ;; (possibly also redirected) *STANDARD-INPUT*.
+ (*standard-input* *debug-io*)
+ (*standard-output* *debug-io*)
+ ;; This seems reasonable: e.g. if the user has redirected
+ ;; *ERROR-OUTPUT* to some log file, it's probably wrong
+ ;; to send errors which occur in interactive debugging to
+ ;; that file, and right to send them to *DEBUG-IO*.
(*error-output* *debug-io*))
(unless (typep condition 'step-condition)
- (show-restarts *debug-restarts* *error-output*))
+ (format *debug-io*
+ "~%~@<Within the debugger, you can type HELP for help. At ~
+ any command prompt (within the debugger or not) you can ~
+ type (SB-EXT:QUIT) to terminate the SBCL executable. ~
+ The condition which caused the debugger to be entered ~
+ is bound to ~S.~:@>~2%"
+ '*debug-condition*)
+ (show-restarts *debug-restarts* *debug-io*)
+ (terpri *debug-io*))
(internal-debug))))))
-(defun show-restarts (restarts &optional (s *error-output*))
+(defun show-restarts (restarts s)
(when restarts
(format s "~&restarts:~%")
(let ((count 0)
(push name names-used))))
(incf count)))))
-;;; This calls DEBUG-LOOP, performing some simple initializations before doing
-;;; so. INVOKE-DEBUGGER calls this to actually get into the debugger.
-;;; SB!CONDITIONS::ERROR-ERROR calls this in emergencies to get into a debug
-;;; prompt as quickly as possible with as little risk as possible for stepping
-;;; on whatever is causing recursive errors.
+;;; This calls DEBUG-LOOP, performing some simple initializations
+;;; before doing so. INVOKE-DEBUGGER calls this to actually get into
+;;; the debugger. SB!KERNEL::ERROR-ERROR calls this in emergencies
+;;; to get into a debug prompt as quickly as possible with as little
+;;; risk as possible for stepping on whatever is causing recursive
+;;; errors.
(defun internal-debug ()
(let ((*in-the-debugger* t)
(*read-suppress* nil))
(unless (typep *debug-condition* 'step-condition)
- (clear-input *debug-io*)
- (format *debug-io*
- "~&Within the debugger, you can type HELP for help.~%"))
+ (clear-input *debug-io*))
#!-mp (debug-loop)
#!+mp (sb!mp:without-scheduling (debug-loop))))
\f
(with-simple-restart (abort
"Reduce debugger level (to debug level ~D)."
level)
- (funcall *debug-prompt*)
+ (debug-prompt *debug-io*)
+ (force-output *debug-io*)
(let ((input (sb!int:get-stream-command *debug-io*)))
(cond (input
(let ((cmd-fun (debug-command-p
(def-debug-command "RESTART" ()
(let ((num (read-if-available :prompt)))
(when (eq num :prompt)
- (show-restarts *debug-restarts*)
+ (show-restarts *debug-restarts* *debug-io*)
(write-string "restart: ")
(force-output)
(setf num (read *standard-input*)))
(def-debug-command-alias "?" "HELP")
(def-debug-command "ERROR" ()
- (format t "~A~%" *debug-condition*)
- (show-restarts *debug-restarts*))
+ (format *debug-io* "~A~%" *debug-condition*)
+ (show-restarts *debug-restarts* *debug-io*))
(def-debug-command "BACKTRACE" ()
(backtrace (read-if-available most-positive-fixnum)))
projects / sbcl.git / blobdiff