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;;;; (ice-9 debugging trace) -- breakpoint trace behaviour
;;; Copyright (C) 2002 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 debugging trace)
#:use-module (ice-9 debug)
#:use-module (ice-9 debugger)
#:use-module (ice-9 debugger utils)
#:use-module (ice-9 debugging steps)
#:use-module (ice-9 debugging traps)
#:export (trace-trap
trace-port
set-trace-layout
trace/pid
trace/stack-id
trace/stack-depth
trace/stack-real-depth
trace/stack
trace/source-file-name
trace/source-line
trace/source-column
trace/source
trace/type
trace/real?
trace/info
trace-at-exit
trace-until-exit))
(define trace-format-string #f)
(define trace-arg-procs #f)
(define (set-trace-layout format-string . arg-procs)
(set! trace-format-string format-string)
(set! trace-arg-procs arg-procs))
(define (trace/pid trap-context)
(getpid))
(define (trace/stack-id trap-context)
(stack-id (tc:stack trap-context)))
(define (trace/stack-depth trap-context)
(tc:depth trap-context))
(define (trace/stack-real-depth trap-context)
(tc:real-depth trap-context))
(define (trace/stack trap-context)
(format #f "~a:~a+~a"
(stack-id (tc:stack trap-context))
(tc:real-depth trap-context)
(- (tc:depth trap-context) (tc:real-depth trap-context))))
(define (trace/source-file-name trap-context)
(cond ((frame->source-position (tc:frame trap-context)) => car)
(else "")))
(define (trace/source-line trap-context)
(cond ((frame->source-position (tc:frame trap-context)) => cadr)
(else 0)))
(define (trace/source-column trap-context)
(cond ((frame->source-position (tc:frame trap-context)) => caddr)
(else 0)))
(define (trace/source trap-context)
(cond ((frame->source-position (tc:frame trap-context))
=>
(lambda (pos)
(format #f "~a:~a:~a" (car pos) (cadr pos) (caddr pos))))
(else "")))
(define (trace/type trap-context)
(case (tc:type trap-context)
((#:application) "APP")
((#:evaluation) "EVA")
((#:return) "RET")
((#:error) "ERR")
(else "???")))
(define (trace/real? trap-context)
(if (frame-real? (tc:frame trap-context)) " " "t"))
(define (trace/info trap-context)
(with-output-to-string
(lambda ()
(if (memq (tc:type trap-context) '(#:application #:evaluation))
((if (tc:expression trap-context)
write-frame-short/expression
write-frame-short/application) (tc:frame trap-context))
(begin
(display "=>")
(write (tc:return-value trap-context)))))))
(set-trace-layout "|~3@a: ~a\n" trace/stack-real-depth trace/info)
;;; trace-trap
;;;
;;; Trace the current location, and install a hook to trace the return
;;; value when we exit the current frame.
(define (trace-trap trap-context)
(apply format
(trace-port)
trace-format-string
(map (lambda (arg-proc)
(arg-proc trap-context))
trace-arg-procs)))
(set! (behaviour-ordering trace-trap) 50)
;;; trace-port
;;;
;;; The port to which trace information is printed.
(define trace-port
(let ((port (current-output-port)))
(make-procedure-with-setter
(lambda () port)
(lambda (new) (set! port new)))))
;;; trace-at-exit
;;;
;;; Trace return value on exit from the current frame.
(define (trace-at-exit trap-context)
(at-exit (tc:depth trap-context) trace-trap))
;;; trace-until-exit
;;;
;;; Trace absolutely everything until exit from the current frame.
(define (trace-until-exit trap-context)
(let ((step-trap (make <step-trap> #:behaviour trace-trap)))
(install-trap step-trap)
(at-exit (tc:depth trap-context)
(lambda (trap-context)
(uninstall-trap step-trap)))))
;;; (ice-9 debugging trace) ends here.
|
