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e1203ea00f
* module/system/base/compile.scm, module/system/base/syntax.scm, module/system/repl/common.scm, module/system/repl/describe.scm, module/system/vm/instruction.scm, module/system/vm/objcode.scm, module/system/vm/profile.scm, module/system/vm/program.scm, module/system/vm/trace.scm: Switch header from GPLv2+ to LGPLv3+.
77 lines
2.6 KiB
Scheme
77 lines
2.6 KiB
Scheme
;;; Guile VM tracer
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;; Copyright (C) 2001 Free Software Foundation, Inc.
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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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;;; Code:
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(define-module (system vm trace)
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#:use-module (system base syntax)
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#:use-module (system vm vm)
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#:use-module (system vm frame)
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#:use-module (ice-9 format)
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#:export (vm-trace vm-trace-on vm-trace-off))
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(define (vm-trace vm objcode . opts)
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(dynamic-wind
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(lambda () (apply vm-trace-on vm opts))
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(lambda () (vm-load vm objcode))
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(lambda () (apply vm-trace-off vm opts))))
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(define (vm-trace-on vm . opts)
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(set-vm-option! vm 'trace-first #t)
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(if (memq #:b opts) (add-hook! (vm-next-hook vm) trace-next))
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(set-vm-option! vm 'trace-options opts)
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(add-hook! (vm-apply-hook vm) trace-apply)
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(add-hook! (vm-return-hook vm) trace-return))
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(define (vm-trace-off vm . opts)
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(if (memq #:b opts) (remove-hook! (vm-next-hook vm) trace-next))
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(remove-hook! (vm-apply-hook vm) trace-apply)
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(remove-hook! (vm-return-hook vm) trace-return))
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(define (trace-next vm)
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(define (puts x) (display #\tab) (write x))
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(define (truncate! x n)
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(if (> (length x) n)
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(list-cdr-set! x (1- n) '(...))) x)
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;; main
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(format #t "0x~8X ~16S" (vm:ip vm) (vm-fetch-code vm))
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(do ((opts (vm-option vm 'trace-options) (cdr opts)))
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((null? opts) (newline))
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(case (car opts)
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((:s) (puts (truncate! (vm-fetch-stack vm) 3)))
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((:l) (puts (vm-fetch-locals vm)))
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((:e) (puts (vm-fetch-externals vm))))))
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(define (trace-apply vm)
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(if (vm-option vm 'trace-first)
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(set-vm-option! vm 'trace-first #f)
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(let ((chain (vm-current-frame-chain vm)))
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(print-indent chain)
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(print-frame-call (car chain))
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(newline))))
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(define (trace-return vm)
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(let ((chain (vm-current-frame-chain vm)))
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(print-indent chain)
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(write (vm-return-value vm))
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(newline)))
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(define (print-indent chain)
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(cond ((pair? (cdr chain))
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(display "| ")
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(print-indent (cdr chain)))))
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