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53befeb700
(Not quite finished, the following will be done tomorrow. module/srfi/*.scm module/rnrs/*.scm module/scripts/*.scm testsuite/*.scm guile-readline/* )
134 lines
4.4 KiB
Scheme
134 lines
4.4 KiB
Scheme
;;;; Copyright (C) 1996, 1997, 1998, 1999, 2001, 2006 Free Software Foundation
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;;;;
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;;;; This library is free software; you can redistribute it and/or
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;;;; modify it under the terms of the GNU Lesser General Public
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;;;; License as published by the Free Software Foundation; either
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;;;; version 3 of the License, or (at your option) any later version.
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;;;;
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;;;; This library is distributed in the hope that it will be useful,
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;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;;; Lesser General Public License for more details.
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;;;;
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;;;; You should have received a copy of the GNU Lesser General Public
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;;;; License along with this library; if not, write to the Free Software
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;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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;;;;
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;;;; The author can be reached at djurfeldt@nada.kth.se
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;;;; Mikael Djurfeldt, SANS/NADA KTH, 10044 STOCKHOLM, SWEDEN
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;;;;
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(define-module (ice-9 debug)
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:export (frame-number->index trace untrace trace-stack untrace-stack))
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;;; {Misc}
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;;;
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(define (frame-number->index n . stack)
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(let ((stack (if (null? stack)
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(fluid-ref the-last-stack)
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(car stack))))
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(if (memq 'backwards (debug-options))
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n
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(- (stack-length stack) n 1))))
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;;; {Trace}
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;;;
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;;; This code is just an experimental prototype (e. g., it is not
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;;; thread safe), but since it's at the same time useful, it's
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;;; included anyway.
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;;;
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(define traced-procedures '())
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(define (trace . args)
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(if (null? args)
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(nameify traced-procedures)
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(begin
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(for-each (lambda (proc)
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(if (not (procedure? proc))
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(error "trace: Wrong type argument:" proc))
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(set-procedure-property! proc 'trace #t)
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(if (not (memq proc traced-procedures))
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(set! traced-procedures
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(cons proc traced-procedures))))
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args)
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(trap-set! apply-frame-handler trace-entry)
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(trap-set! exit-frame-handler trace-exit)
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;; We used to reset `trace-level' here to 0, but this is wrong
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;; if `trace' itself is being traced, since `trace-exit' will
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;; then decrement `trace-level' to -1! It shouldn't actually
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;; be necessary to set `trace-level' here at all.
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(debug-enable 'trace)
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(nameify args))))
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(define (untrace . args)
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(if (and (null? args)
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(not (null? traced-procedures)))
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(apply untrace traced-procedures)
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(begin
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(for-each (lambda (proc)
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(set-procedure-property! proc 'trace #f)
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(set! traced-procedures (delq! proc traced-procedures)))
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args)
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(if (null? traced-procedures)
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(debug-disable 'trace))
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(nameify args))))
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(define (nameify ls)
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(map (lambda (proc)
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(let ((name (procedure-name proc)))
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(or name proc)))
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ls))
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(define trace-level 0)
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(add-hook! abort-hook (lambda () (set! trace-level 0)))
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(define traced-stack-ids (list 'repl-stack))
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(define trace-all-stacks? #f)
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(define (trace-stack id)
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"Add ID to the set of stack ids for which tracing is active.
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If `#t' is in this set, tracing is active regardless of stack context.
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To remove ID again, use `untrace-stack'. If you add the same ID twice
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using `trace-stack', you will need to remove it twice."
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(set! traced-stack-ids (cons id traced-stack-ids))
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(set! trace-all-stacks? (memq #t traced-stack-ids)))
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(define (untrace-stack id)
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"Remove ID from the set of stack ids for which tracing is active."
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(set! traced-stack-ids (delq1! id traced-stack-ids))
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(set! trace-all-stacks? (memq #t traced-stack-ids)))
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(define (trace-entry key cont tail)
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(if (or trace-all-stacks?
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(memq (stack-id cont) traced-stack-ids))
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(let ((cep (current-error-port))
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(frame (last-stack-frame cont)))
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(if (not tail)
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(set! trace-level (+ trace-level 1)))
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(let indent ((n trace-level))
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(cond ((> n 1) (display "| " cep) (indent (- n 1)))))
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(display-application frame cep)
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(newline cep)))
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;; It's not necessary to call the continuation since
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;; execution will continue if the handler returns
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;(cont #f)
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)
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(define (trace-exit key cont retval)
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(if (or trace-all-stacks?
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(memq (stack-id cont) traced-stack-ids))
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(let ((cep (current-error-port)))
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(set! trace-level (- trace-level 1))
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(let indent ((n trace-level))
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(cond ((> n 0) (display "| " cep) (indent (- n 1)))))
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(write retval cep)
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(newline cep))))
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;;; A fix to get the error handling working together with the module system.
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;;;
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;;; XXX - Still needed?
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(module-set! the-root-module 'debug-options debug-options)
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