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Aminet - June 1993 [Walnut Creek].iso
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cpr.el
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1992-12-29
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;; Run cpr under Emacs
;; Copyright (C) 1988 Free Software Foundation, Inc.
;; This file is part of GNU Emacs.
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 1, or (at your option)
;; any later version.
;; GNU Emacs 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 General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to
;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
;; Original of the gdb package : W. Schelter, University of Texas
;; wfs@rascal.ics.utexas.edu
;; Rewritten by rms.
;; Some ideas are due to Masanobu.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; These lines describe the changes to gdb.el that were made in order to create
;; a CPR-compatible package.
;;
;; Author of the CPR package : C. Beust, Bull/Inria, Sophia Antipolis, Nice
;; beust@sa.inria.fr
;; M-s steps by one line, and redisplays the source file and line.
;; M-SPC steps one source line over functions
;; M-c continues normal running
;;
;; All the other commands were kept as is except the ones that don't exist in
;; CPR (frame up/down for example).
;;
;; Instead of the shell mode, I chose to use comint.el as an underlying mode
;; for CPR operations. comint.el is far ahead shell.el and using this latter
;; is now pure heresy...
;;
;; Main advantages brought by the comint mode :
;;
;; M-p Recall previous line of input (like ^P under a regular shell)
;; M-n Recall next line of input (like ^N under a regular shell)
;;
;; Press C-hm for in the *cpr* buffer for more information on comint.
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Description of CPR interface:
;; A facility is provided for the simultaneous display of the source code
;; in one window, while using cpr to step through a function in the
;; other. A small arrow in the source window, indicates the current
;; line.
;; Starting up:
;; In order to use this facility, invoke the command CPR to obtain a
;; shell window with the appropriate command bindings. You will be asked
;; for the name of a file to run. Cpr will be invoked on this file, in a
;; window named *cpr-foo* if the file is foo.
;; You may easily create additional commands and bindings to interact
;; with the display. For example to put the cpr command next on \M-n
;; (def-cpr next "\M-n")
;; This causes the emacs command cpr-next to be defined, and runs
;; cpr-display-frame after the command.
;; cpr-display-frame is the basic display function. It tries to display
;; in the other window, the file and line corresponding to the current
;; position in the cpr window. For example after a cpr-step, it would
;; display the line corresponding to the position for the last step. Or
;; if you have done a backtrace in the cpr buffer, and move the cursor
;; into one of the frames, it would display the position corresponding to
;; that frame.
;; cpr-display-frame is invoked automatically when a filename-and-line-number
;; appears in the output.
(require 'comint)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; The following functions were added for CPR portability
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; This regexp matches a function name followed by its arguments. It sets the
;; meta-argument to the name of the function.
(defvar cpr-function-name-regexp "\\([^(]+\\)([^)]*)")
(defun cpr-function-name (name line)
"This should belong to C-mode. It returns the name of the function which
contains 'line' in the buffer 'name'. Might be bogus since the only way
I found to locate this function is by assuming it is followed by '^{'"
(save-window-excursion
(save-excursion
(save-restriction
(widen)
(if (re-search-backward "^{" 0 t)
(if (re-search-backward cpr-function-name-regexp)
(progn
(backward-word 1)
(re-search-forward cpr-function-name-regexp)
(buffer-substring (match-end 1) (match-beginning 1))
) ;; progn
"** couldn't locate function with regexp **")
"** couldn't locate function with ^{ **")
) ;; save-restriction
) ;; save-excursion
) ;; save-window-excursion
)
;; This regexp matches the format of the coordinates as displayed by CPR. For
;; example : 'prog:\prog.c\main 29'
;; The meta-argument 1 is set to the source name (prog.c) and number 2 is the
;; line number
(defvar cpr-location-regexp "^[^0-9:]+:.\\([^\\]+\\)[^ ]+ \\([0-9]+\\)")
(defun cpr-transform-string (string)
(cpr-perform-transformation string)
)
(defun cpr-perform-transformation (string)
"Convert a cpr-string (prog:\prog.c\main 29) into a gdb-string
(\032\032prog.c:29:CHARPOS). CHARPOS is set to zero since it doesn't
seem to be used by the package (might induce a bug)."
(let ((result string))
(if (string-match cpr-location-regexp string)
(progn
(setq result
(concat
"\032\032"
(substring string (match-beginning 1) (match-end 1))
":"
(substring string (match-beginning 2) (match-end 2))
":"
"0"
)
); setq
) ;; progn
) ;; if
result))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; gdb-old :
;; (defvar cpr-prompt-pattern "^(.*cpr[+]?) *"
(defvar cpr-prompt-pattern "^>"
"A regexp to recognize the prompt for cpr or cpr+.")
(defvar cpr-mode-map nil
"Keymap for cpr-mode.")
(if cpr-mode-map
nil
(setq cpr-mode-map (copy-keymap comint-mode-map))
(define-key cpr-mode-map "\C-l" 'cpr-refresh))
(define-key ctl-x-map " " 'cpr-break)
(define-key ctl-x-map "&" 'send-cpr-command)
;;Of course you may use `def-cpr' with any other cpr command, including
;;user defined ones.
(defmacro def-cpr (name key &optional doc)
(let* ((fun (intern (format "cpr-%s" name)))
(cstr (list 'if '(not (= 1 arg))
(list 'format "%s %s" name 'arg)
name)))
(list 'progn
(list 'defun fun '(arg)
(or doc "")
'(interactive "p")
(list 'cpr-call cstr))
(list 'define-key 'cpr-mode-map key (list 'quote fun)))))
(def-cpr "proceed" "\M-n" "Step one source line with display")
(def-cpr "cont" "\M-c" "Continue with display")
(def-cpr "finish" "\C-c\C-f" "Finish executing current function")
(defun cpr-mode ()
"Major mode for interacting with an inferior Cpr process.
The following commands are available:
\\{cpr-mode-map}
\\[cpr-display-frame] displays in the other window
the last line referred to in the cpr buffer.
\\[cpr-step],\\[cpr-next], and \\[cpr-nexti] in the cpr window,
call cpr to step,next or nexti and then update the other window
with the current file and position.
If you are in a source file, you may select a point to break
at, by doing \\[cpr-break].
Commands:
Many commands are inherited from shell mode.
Additionally we have:
\\[cpr-display-frame] display frames file in other window
\\[cpr-step] advance one line in program
\\[cpr-next] advance one line in program (skip over calls).
\\[send-cpr-command] used for special printing of an arg at the current point.
C-x SPACE sets break point at current line."
(interactive)
(kill-all-local-variables)
(setq major-mode 'cpr-mode)
(setq mode-name "Inferior Cpr")
(setq mode-line-process '(": %s"))
(use-local-map cpr-mode-map)
(make-local-variable 'comint-last-input-start)
(setq comint-last-input-start (make-marker))
(make-local-variable 'comint-last-input-end)
(setq comint-last-input-end! (make-marker))
(make-local-variable 'cpr-last-frame)
(setq cpr-last-frame nil)
(make-local-variable 'cpr-last-frame-displayed-p)
(setq cpr-last-frame-displayed-p t)
(make-local-variable 'cpr-delete-prompt-marker)
(setq cpr-delete-prompt-marker nil)
(make-local-variable 'cpr-filter-accumulator)
(setq cpr-filter-accumulator nil)
(make-local-variable 'comint-prompt-regexp)
(setq comint-prompt-regexp cpr-prompt-pattern)
(run-hooks 'shell-mode-hook 'cpr-mode-hook)
)
(defvar current-cpr-buffer nil)
(defvar cpr-command-name "cpr"
"Pathname for executing cpr.")
(defun cpr (path)
"Run cpr on program FILE in buffer *cpr-FILE*.
The directory containing FILE becomes the initial working directory
and source-file directory for CPR. If you wish to change this, use
the CPR commands `cd DIR' and `directory'."
;; (interactive "FRun cpr on file: ")
(interactive (comint-get-source "Run cpr on file: " () '(c-mode) t))
(setq path (expand-file-name path))
(let ((file (file-name-nondirectory path)))
(switch-to-buffer (concat "*cpr-" file "*"))
(setq default-directory (file-name-directory path))
(or (bolp) (newline))
(insert "Current directory is " default-directory "\n")
;;gdb-old :
;; (make-shell (concat "cpr-" file) cpr-command-name nil "-fullname"
;; "-cd" default-directory file)
;; cpr-new :
(comint-mode)
(make-comint (concat "cpr-" file) cpr-command-name nil "-line" file)
(cpr-mode)
(set-process-filter (get-buffer-process (current-buffer)) 'cpr-filter)
(set-process-sentinel (get-buffer-process (current-buffer)) 'cpr-sentinel)
(cpr-set-buffer)))
(defun cpr-set-buffer ()
(cond ((eq major-mode 'cpr-mode)
(setq current-cpr-buffer (current-buffer)))))
;; This function is responsible for inserting output from CPR
;; into the buffer.
;; Aside from inserting the text, it notices and deletes
;; each filename-and-line-number;
;; that CPR prints to identify the selected frame.
;; It records the filename and line number, and maybe displays that file.
(defun cpr-filter (proc string)
;; cpr-new :
(setq string (cpr-transform-string string))
;;
(let ((inhibit-quit t))
(if cpr-filter-accumulator
(cpr-filter-accumulate-marker proc
(concat cpr-filter-accumulator string))
(cpr-filter-scan-input proc string))))
(defun cpr-filter-accumulate-marker (proc string)
(setq cpr-filter-accumulator nil)
(if (> (length string) 1)
(if (= (aref string 1) ?\032)
(let ((end (string-match "\n" string)))
(if end
(progn
(let* ((first-colon (string-match ":" string 2))
(second-colon
(string-match ":" string (1+ first-colon))))
(setq cpr-last-frame
(cons (substring string 2 first-colon)
(string-to-int
(substring string (1+ first-colon)
second-colon)))))
(setq cpr-last-frame-displayed-p nil)
(cpr-filter-scan-input proc
(substring string (1+ end))))
(setq cpr-filter-accumulator string)))
(cpr-filter-insert proc "\032")
(cpr-filter-scan-input proc (substring string 1)))
(setq cpr-filter-accumulator string)))
(defun cpr-filter-scan-input (proc string)
(if (equal string "")
(setq cpr-filter-accumulator nil)
(let ((start (string-match "\032" string)))
(if start
(progn (cpr-filter-insert proc (substring string 0 start))
(cpr-filter-accumulate-marker proc
(substring string start)))
(cpr-filter-insert proc string)))))
(defun cpr-filter-insert (proc string)
(let ((moving (= (point) (process-mark proc)))
(output-after-point (< (point) (process-mark proc)))
(old-buffer (current-buffer))
start)
(set-buffer (process-buffer proc))
(unwind-protect
(save-excursion
;; Insert the text, moving the process-marker.
(goto-char (process-mark proc))
(setq start (point))
(insert string)
(set-marker (process-mark proc) (point))
(cpr-maybe-delete-prompt)
;; Check for a filename-and-line number.
(cpr-display-frame
;; Don't display the specified file
;; unless (1) point is at or after the position where output appears
;; and (2) this buffer is on the screen.
(or output-after-point
(not (get-buffer-window (current-buffer))))
;; Display a file only when a new filename-and-line-number appears.
t))
(set-buffer old-buffer))
(if moving (goto-char (process-mark proc)))))
(defun cpr-sentinel (proc msg)
(cond ((null (buffer-name (process-buffer proc)))
;; buffer killed
;; Stop displaying an arrow in a source file.
(setq overlay-arrow-position nil)
(set-process-buffer proc nil))
((memq (process-status proc) '(signal exit))
;; Stop displaying an arrow in a source file.
(setq overlay-arrow-position nil)
;; Fix the mode line.
(setq mode-line-process
(concat ": "
(symbol-name (process-status proc))))
(let* ((obuf (current-buffer)))
;; save-excursion isn't the right thing if
;; process-buffer is current-buffer
(unwind-protect
(progn
;; Write something in *compilation* and hack its mode line,
(set-buffer (process-buffer proc))
;; Force mode line redisplay soon
(set-buffer-modified-p (buffer-modified-p))
(if (eobp)
(insert ?\n mode-name " " msg)
(save-excursion
(goto-char (point-max))
(insert ?\n mode-name " " msg)))
;; If buffer and mode line will show that the process
;; is dead, we can delete it now. Otherwise it
;; will stay around until M-x list-processes.
(delete-process proc))
;; Restore old buffer, but don't restore old point
;; if obuf is the cpr buffer.
(set-buffer obuf))))))
(defun cpr-refresh ()
"Fix up a possibly garbled display, and redraw the arrow."
(interactive)
(redraw-display)
(cpr-display-frame))
(defun cpr-display-frame (&optional nodisplay noauto)
"Find, obey and delete the last filename-and-line marker from CPR.
The marker looks like \\032\\032FILENAME:LINE:CHARPOS\\n.
Obeying it means displaying in another window the specified file and line."
(interactive)
(cpr-set-buffer)
(and cpr-last-frame (not nodisplay)
(or (not cpr-last-frame-displayed-p) (not noauto))
(progn (cpr-display-line (car cpr-last-frame) (cdr cpr-last-frame))
(setq cpr-last-frame-displayed-p t))))
;; Make sure the file named TRUE-FILE is in a buffer that appears on the screen
;; and that its line LINE is visible.
;; Put the overlay-arrow on the line LINE in that buffer.
(defun cpr-display-line (true-file line)
(let* ((buffer (find-file-noselect true-file))
(window (display-buffer buffer t))
(pos))
(save-excursion
(set-buffer buffer)
(save-restriction
(widen)
(goto-line line)
(setq pos (point))
(setq overlay-arrow-string "=>")
(or overlay-arrow-position
(setq overlay-arrow-position (make-marker)))
(set-marker overlay-arrow-position (point) (current-buffer)))
(cond ((or (< pos (point-min)) (> pos (point-max)))
(widen)
(goto-char pos))))
(set-window-point window overlay-arrow-position)))
(defun cpr-call (command)
"Invoke cpr COMMAND displaying source in other window."
(interactive)
(goto-char (point-max))
(setq cpr-delete-prompt-marker (point-marker))
(cpr-set-buffer)
(send-string (get-buffer-process current-cpr-buffer)
(concat command "\n")))
(defun cpr-maybe-delete-prompt ()
(if (and cpr-delete-prompt-marker
(> (point-max) (marker-position cpr-delete-prompt-marker)))
(let (start)
(goto-char cpr-delete-prompt-marker)
(setq start (point))
(beginning-of-line)
(delete-region (point) start)
(setq cpr-delete-prompt-marker nil))))
(defun cpr-break ()
"Set CPR breakpoint at this source line."
(interactive)
(let* ((file-name (file-name-nondirectory buffer-file-name))
(line (save-restriction
(widen)
(1+ (count-lines 1 (point)))))
(function (cpr-function-name file-name line)))
;; gdb-old:
;; (send-string (get-buffer-process current-cpr-buffer)
;; (concat "break " file-name ":" line "\n"))))
;; cpr-new :
(send-string (get-buffer-process current-cpr-buffer)
(concat "break \\" file-name "\\" function " " line "\n"))
(send-string (get-buffer-process current-cpr-buffer)
(concat "blist\n"))
)
)
(defun cpr-read-address()
"Return a string containing the core-address found in the buffer at point."
(save-excursion
(let ((pt (dot)) found begin)
(setq found (if (search-backward "0x" (- pt 7) t)(dot)))
(cond (found (forward-char 2)(setq result
(buffer-substring found
(progn (re-search-forward "[^0-9a-f]")
(forward-char -1)
(dot)))))
(t (setq begin (progn (re-search-backward "[^0-9]") (forward-char 1)
(dot)))
(forward-char 1)
(re-search-forward "[^0-9]")
(forward-char -1)
(buffer-substring begin (dot)))))))
(defvar cpr-commands nil
"List of strings or functions used by send-cpr-command.
It is for customization by you.")
(defun send-cpr-command (arg)
"This command reads the number where the cursor is positioned. It
then inserts this ADDR at the end of the cpr buffer. A numeric arg
selects the ARG'th member COMMAND of the list cpr-print-command. If
COMMAND is a string, (format COMMAND ADDR) is inserted, otherwise
(funcall COMMAND ADDR) is inserted. eg. \"p (rtx)%s->fld[0].rtint\"
is a possible string to be a member of cpr-commands. "
(interactive "P")
(let (comm addr)
(if arg (setq comm (nth arg cpr-commands)))
(setq addr (cpr-read-address))
(if (eq (current-buffer) current-cpr-buffer)
(set-mark (point)))
(cond (comm
(setq comm
(if (stringp comm) (format comm addr) (funcall comm addr))))
(t (setq comm addr)))
(switch-to-buffer current-cpr-buffer)
(goto-char (dot-max))
(insert-string comm)))