mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-04-30 03:40:34 +02:00
2896942751
* module/ice-9/scm-style-repl.scm: * module/ice-9/save-stack.scm: As the deprecated bindings have been removed from the default environment, use #:export instead of #:replace.
279 lines
12 KiB
Scheme
279 lines
12 KiB
Scheme
;;;; Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2014
|
||
;;;; Free Software Foundation, Inc.
|
||
;;;;
|
||
;;;; This library is free software; you can redistribute it and/or
|
||
;;;; modify it under the terms of the GNU Lesser General Public
|
||
;;;; License as published by the Free Software Foundation; either
|
||
;;;; version 3 of the License, or (at your option) any later version.
|
||
;;;;
|
||
;;;; This library is distributed in the hope that it will be useful,
|
||
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
;;;; Lesser General Public License for more details.
|
||
;;;;
|
||
;;;; You should have received a copy of the GNU Lesser General Public
|
||
;;;; License along with this library; if not, write to the Free Software
|
||
;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||
;;;;
|
||
|
||
(define-module (ice-9 scm-style-repl)
|
||
#:use-module (ice-9 save-stack)
|
||
|
||
#:export (scm-repl-silent
|
||
scm-repl-print-unspecified
|
||
scm-repl-verbose
|
||
scm-repl-prompt
|
||
assert-repl-silence
|
||
assert-repl-print-unspecified
|
||
assert-repl-verbosity
|
||
|
||
default-pre-unwind-handler
|
||
bad-throw
|
||
error-catching-loop
|
||
error-catching-repl
|
||
scm-style-repl
|
||
handle-system-error))
|
||
|
||
(define scm-repl-silent #f)
|
||
(define (assert-repl-silence v) (set! scm-repl-silent v))
|
||
|
||
(define scm-repl-print-unspecified #f)
|
||
(define (assert-repl-print-unspecified v) (set! scm-repl-print-unspecified v))
|
||
|
||
(define scm-repl-verbose #f)
|
||
(define (assert-repl-verbosity v) (set! scm-repl-verbose v))
|
||
|
||
(define scm-repl-prompt "guile> ")
|
||
|
||
|
||
|
||
;; bad-throw is the hook that is called upon a throw to a an unhandled
|
||
;; key (unless the throw has four arguments, in which case
|
||
;; it's usually interpreted as an error throw.)
|
||
;; If the key has a default handler (a throw-handler-default property),
|
||
;; it is applied to the throw.
|
||
;;
|
||
(define (bad-throw key . args)
|
||
(let ((default (symbol-property key 'throw-handler-default)))
|
||
(or (and default (apply default key args))
|
||
(apply error "unhandled-exception:" key args))))
|
||
|
||
|
||
|
||
(define (default-pre-unwind-handler key . args)
|
||
;; Narrow by two more frames: this one, and the throw handler.
|
||
(save-stack 2)
|
||
(apply throw key args))
|
||
|
||
|
||
|
||
(define has-shown-debugger-hint? #f)
|
||
|
||
(define (error-catching-loop thunk)
|
||
(let ((status #f)
|
||
(interactive #t))
|
||
(define (loop first)
|
||
(let ((next
|
||
(catch #t
|
||
|
||
(lambda ()
|
||
(call-with-unblocked-asyncs
|
||
(lambda ()
|
||
(first)
|
||
|
||
;; This line is needed because mark
|
||
;; doesn't do closures quite right.
|
||
;; Unreferenced locals should be
|
||
;; collected.
|
||
(set! first #f)
|
||
(let loop ((v (thunk)))
|
||
(loop (thunk)))
|
||
#f)))
|
||
|
||
(lambda (key . args)
|
||
(case key
|
||
((quit)
|
||
(set! status args)
|
||
#f)
|
||
|
||
((switch-repl)
|
||
(apply throw 'switch-repl args))
|
||
|
||
((abort)
|
||
;; This is one of the closures that require
|
||
;; (set! first #f) above
|
||
;;
|
||
(lambda ()
|
||
(run-hook abort-hook)
|
||
(force-output (current-output-port))
|
||
(display "ABORT: " (current-error-port))
|
||
(write args (current-error-port))
|
||
(newline (current-error-port))
|
||
(if interactive
|
||
(begin
|
||
(if (and
|
||
(not has-shown-debugger-hint?)
|
||
(not (memq 'backtrace
|
||
(debug-options-interface)))
|
||
(stack? (fluid-ref the-last-stack)))
|
||
(begin
|
||
(newline (current-error-port))
|
||
(display
|
||
"Type \"(backtrace)\" to get more information or \"(debug)\" to enter the debugger.\n"
|
||
(current-error-port))
|
||
(set! has-shown-debugger-hint? #t)))
|
||
(force-output (current-error-port)))
|
||
(begin
|
||
(primitive-exit 1)))
|
||
(set! stack-saved? #f)))
|
||
|
||
(else
|
||
;; This is the other cons-leak closure...
|
||
(lambda ()
|
||
(cond ((= (length args) 4)
|
||
(apply handle-system-error key args))
|
||
(else
|
||
(apply bad-throw key args)))))))
|
||
|
||
default-pre-unwind-handler)))
|
||
|
||
(if next (loop next) status)))
|
||
(set! ensure-batch-mode! (lambda ()
|
||
(set! interactive #f)
|
||
(restore-signals)))
|
||
(set! batch-mode? (lambda () (not interactive)))
|
||
(call-with-blocked-asyncs
|
||
(lambda () (loop (lambda () #t))))))
|
||
|
||
(define (error-catching-repl r e p)
|
||
(error-catching-loop
|
||
(lambda ()
|
||
(call-with-values (lambda () (e (r)))
|
||
(lambda the-values (for-each p the-values))))))
|
||
|
||
(define (scm-style-repl)
|
||
(letrec (
|
||
(start-gc-rt #f)
|
||
(start-rt #f)
|
||
(repl-report-start-timing (lambda ()
|
||
(set! start-gc-rt (gc-run-time))
|
||
(set! start-rt (get-internal-run-time))))
|
||
(repl-report (lambda ()
|
||
(display ";;; ")
|
||
(display (inexact->exact
|
||
(* 1000 (/ (- (get-internal-run-time) start-rt)
|
||
internal-time-units-per-second))))
|
||
(display " msec (")
|
||
(display (inexact->exact
|
||
(* 1000 (/ (- (gc-run-time) start-gc-rt)
|
||
internal-time-units-per-second))))
|
||
(display " msec in gc)\n")))
|
||
|
||
(consume-trailing-whitespace
|
||
(lambda ()
|
||
(let ((ch (peek-char)))
|
||
(cond
|
||
((eof-object? ch))
|
||
((or (char=? ch #\space) (char=? ch #\tab))
|
||
(read-char)
|
||
(consume-trailing-whitespace))
|
||
((char=? ch #\newline)
|
||
(read-char))))))
|
||
(-read (lambda ()
|
||
(let ((val
|
||
(let ((prompt (cond ((string? scm-repl-prompt)
|
||
scm-repl-prompt)
|
||
((thunk? scm-repl-prompt)
|
||
(scm-repl-prompt))
|
||
(scm-repl-prompt "> ")
|
||
(else ""))))
|
||
(repl-reader prompt))))
|
||
|
||
;; As described in R4RS, the READ procedure updates the
|
||
;; port to point to the first character past the end of
|
||
;; the external representation of the object. This
|
||
;; means that it doesn't consume the newline typically
|
||
;; found after an expression. This means that, when
|
||
;; debugging Guile with GDB, GDB gets the newline, which
|
||
;; it often interprets as a "continue" command, making
|
||
;; breakpoints kind of useless. So, consume any
|
||
;; trailing newline here, as well as any whitespace
|
||
;; before it.
|
||
;; But not if EOF, for control-D.
|
||
(if (not (eof-object? val))
|
||
(consume-trailing-whitespace))
|
||
(run-hook after-read-hook)
|
||
(if (eof-object? val)
|
||
(begin
|
||
(repl-report-start-timing)
|
||
(if scm-repl-verbose
|
||
(begin
|
||
(newline)
|
||
(display ";;; EOF -- quitting")
|
||
(newline)))
|
||
(quit 0)))
|
||
val)))
|
||
|
||
(-eval (lambda (sourc)
|
||
(repl-report-start-timing)
|
||
(run-hook before-eval-hook sourc)
|
||
(let ((val (start-stack 'repl-stack
|
||
;; If you change this procedure
|
||
;; (primitive-eval), please also
|
||
;; modify the repl-stack case in
|
||
;; save-stack so that stack cutting
|
||
;; continues to work.
|
||
(primitive-eval sourc))))
|
||
(run-hook after-eval-hook sourc)
|
||
val)))
|
||
|
||
|
||
(-print (let ((maybe-print (lambda (result)
|
||
(if (or scm-repl-print-unspecified
|
||
(not (unspecified? result)))
|
||
(begin
|
||
(write result)
|
||
(newline))))))
|
||
(lambda (result)
|
||
(if (not scm-repl-silent)
|
||
(begin
|
||
(run-hook before-print-hook result)
|
||
(maybe-print result)
|
||
(run-hook after-print-hook result)
|
||
(if scm-repl-verbose
|
||
(repl-report))
|
||
(force-output))))))
|
||
|
||
(-quit (lambda (args)
|
||
(if scm-repl-verbose
|
||
(begin
|
||
(display ";;; QUIT executed, repl exitting")
|
||
(newline)
|
||
(repl-report)))
|
||
args)))
|
||
|
||
(let ((status (error-catching-repl -read
|
||
-eval
|
||
-print)))
|
||
(-quit status))))
|
||
|
||
(define (handle-system-error key . args)
|
||
(let ((cep (current-error-port)))
|
||
(cond ((not (stack? (fluid-ref the-last-stack))))
|
||
((memq 'backtrace (debug-options-interface))
|
||
(let ((highlights (if (or (eq? key 'wrong-type-arg)
|
||
(eq? key 'out-of-range))
|
||
(list-ref args 3)
|
||
'())))
|
||
(run-hook before-backtrace-hook)
|
||
(newline cep)
|
||
(display "Backtrace:\n")
|
||
(display-backtrace (fluid-ref the-last-stack) cep
|
||
#f #f highlights)
|
||
(newline cep)
|
||
(run-hook after-backtrace-hook))))
|
||
(run-hook before-error-hook)
|
||
(apply display-error (fluid-ref the-last-stack) cep args)
|
||
(run-hook after-error-hook)
|
||
(force-output cep)
|
||
(throw 'abort key)))
|