module/system/vm/profile.scm

   1 ;;; Guile VM profiler
   2
   3 ;; Copyright (C) 2001 Free Software Foundation, Inc.
   4
   5 ;; This program is free software; you can redistribute it and/or modify
   6 ;; it under the terms of the GNU General Public License as published by
   7 ;; the Free Software Foundation; either version 2, or (at your option)
   8 ;; any later version.
   9 ;;
  10 ;; This program is distributed in the hope that it will be useful,
  11 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 ;; GNU General Public License for more details.
  14 ;;
  15 ;; You should have received a copy of the GNU General Public License
  16 ;; along with this program; see the file COPYING.  If not, write to
  17 ;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18 ;; Boston, MA 02111-1307, USA.
  19
  20 ;;; Code:
  21
  22 (define-module (system vm profile)
  23   :use-module (system vm core)
  24   :use-module (ice-9 format)
  25   :export (vm-profile))
  26
  27 (define (vm-profile vm objcode . opts)
  28   (let ((flag (vm-option vm 'debug)))
  29     (dynamic-wind
  30         (lambda ()
  31           (set-vm-option! vm 'debug #t)
  32           (set-vm-option! vm 'profile-data '())
  33           (add-hook! (vm-next-hook vm) profile-next)
  34           (add-hook! (vm-enter-hook vm) profile-enter)
  35           (add-hook! (vm-exit-hook vm) profile-exit))
  36         (lambda ()
  37           (let ((val (vm (objcode->program objcode))))
  38             (display-result vm)
  39             val))
  40         (lambda ()
  41           (set-vm-option! vm 'debug flag)
  42           (remove-hook! (vm-next-hook vm) profile-next)
  43           (remove-hook! (vm-enter-hook vm) profile-enter)
  44           (remove-hook! (vm-exit-hook vm) profile-exit)))))
  45
  46 (define (profile-next vm)
  47   (set-vm-option! vm 'profile-data
  48                   (cons (vm-fetch-code vm) (vm-option vm 'profile-data))))
  49
  50 (define (profile-enter vm)
  51   #f)
  52
  53 (define (profile-exit vm)
  54   #f)
  55
  56 (define (display-result vm . opts)
  57   (do ((data (vm-option vm 'profile-data) (cdr data))
  58        (summary '() (let ((inst (caar data)))
  59                       (assq-set! summary inst
  60                                  (1+ (or (assq-ref summary inst) 0))))))
  61       ((null? data)
  62        (display "Count  Instruction\n")
  63        (display "-----  -----------\n")
  64        (for-each (lambda (entry)
  65                    (format #t "~5@A  ~A\n" (cdr entry) (car entry)))
  66                  (sort summary (lambda (e1 e2) (> (cdr e1) (cdr e2))))))))