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Annotation of 43BSDReno/contrib/emacs-18.55/lisp/gdb.el, revision 1.1

1.1     ! root        1: ;; Run gdb under Emacs
        !             2: ;; Author: W. Schelter, University of Texas
        !             3: ;;     [email protected]
        !             4: ;; Rewritten by rms.
        !             5: 
        !             6: ;; Some ideas are due to  Masanobu. 
        !             7: 
        !             8: ;; This file is part of GNU Emacs.
        !             9: ;; Copyright (C) 1988 Free Software Foundation, Inc.
        !            10: 
        !            11: ;; GNU Emacs is distributed in the hope that it will be useful, but
        !            12: ;; WITHOUT ANY WARRANTY.  No author or distributor accepts responsibility
        !            13: ;; to anyone for the consequences of using it or for whether it serves
        !            14: ;; any particular purpose or works at all, unless he says so in writing.
        !            15: ;; Refer to the GNU Emacs General Public License for full details.
        !            16: 
        !            17: ;; Everyone is granted permission to copy, modify and redistribute GNU
        !            18: ;; Emacs, but only under the conditions described in the GNU Emacs
        !            19: ;; General Public License.  A copy of this license is supposed to have
        !            20: ;; been given to you along with GNU Emacs so you can know your rights and
        !            21: ;; responsibilities.  It should be in a file named COPYING.  Among other
        !            22: ;; things, the copyright notice and this notice must be preserved on all
        !            23: ;; copies.
        !            24: 
        !            25: ;; Description of GDB interface:
        !            26: 
        !            27: ;; A facility is provided for the simultaneous display of the source code
        !            28: ;; in one window, while using gdb to step through a function in the
        !            29: ;; other.  A small arrow in the source window, indicates the current
        !            30: ;; line.
        !            31: 
        !            32: ;; Starting up:
        !            33: 
        !            34: ;; In order to use this facility, invoke the command GDB to obtain a
        !            35: ;; shell window with the appropriate command bindings.  You will be asked
        !            36: ;; for the name of a file to run.  Gdb will be invoked on this file, in a
        !            37: ;; window named *gdb-foo* if the file is foo.
        !            38: 
        !            39: ;; M-s steps by one line, and redisplays the source file and line.
        !            40: 
        !            41: ;; You may easily create additional commands and bindings to interact
        !            42: ;; with the display.  For example to put the gdb command next on \M-n
        !            43: ;; (def-gdb next "\M-n")
        !            44: 
        !            45: ;; This causes the emacs command gdb-next to be defined, and runs
        !            46: ;; gdb-display-frame after the command.
        !            47: 
        !            48: ;; gdb-display-frame is the basic display function.  It tries to display
        !            49: ;; in the other window, the file and line corresponding to the current
        !            50: ;; position in the gdb window.  For example after a gdb-step, it would
        !            51: ;; display the line corresponding to the position for the last step.  Or
        !            52: ;; if you have done a backtrace in the gdb buffer, and move the cursor
        !            53: ;; into one of the frames, it would display the position corresponding to
        !            54: ;; that frame.
        !            55: 
        !            56: ;; gdb-display-frame is invoked automatically when a filename-and-line-number
        !            57: ;; appears in the output.
        !            58: 
        !            59: 
        !            60: (require 'shell)
        !            61: 
        !            62: (defvar gdb-prompt-pattern "^(.*gdb[+]?) *"
        !            63:   "A regexp to recognize the prompt for gdb or gdb+.") 
        !            64: 
        !            65: (defvar gdb-mode-map nil
        !            66:   "Keymap for gdb-mode.")
        !            67: 
        !            68: (if gdb-mode-map
        !            69:    nil
        !            70:   (setq gdb-mode-map (copy-keymap shell-mode-map))
        !            71:   (define-key gdb-mode-map "\C-l" 'gdb-refresh))
        !            72: 
        !            73: (define-key ctl-x-map " " 'gdb-break)
        !            74: (define-key ctl-x-map "&" 'send-gdb-command)
        !            75: 
        !            76: ;;Of course you may use `def-gdb' with any other gdb command, including
        !            77: ;;user defined ones.   
        !            78: 
        !            79: (defmacro def-gdb (name key &optional doc)
        !            80:   (let* ((fun (intern (format "gdb-%s" name)))
        !            81:         (cstr (list 'if '(not (= 1 arg))
        !            82:                     (list 'format "%s %s" name 'arg)
        !            83:                     name)))
        !            84:     (list 'progn
        !            85:          (list 'defun fun '(arg)
        !            86:                (or doc "")
        !            87:                '(interactive "p")
        !            88:                (list 'gdb-call cstr))
        !            89:          (list 'define-key 'gdb-mode-map key  (list 'quote fun)))))
        !            90: 
        !            91: (def-gdb "step"   "\M-s" "Step one source line with display")
        !            92: (def-gdb "stepi"  "\M-i" "Step one instruction with display")
        !            93: (def-gdb "next"   "\M-n" "Step one source line (skip functions)")
        !            94: (def-gdb "cont"   "\M-c" "Continue with display")
        !            95: 
        !            96: (def-gdb "finish" "\C-c\C-f" "Finish executing current function")
        !            97: (def-gdb "up"     "\M-u"   "Go up N stack frames (numeric arg) with display")
        !            98: (def-gdb "down"   "\M-d"   "Go down N stack frames (numeric arg) with display")
        !            99: 
        !           100: (defun gdb-mode ()
        !           101:   "Major mode for interacting with an inferior Gdb process.
        !           102: The following commands are available:
        !           103: 
        !           104: \\{gdb-mode-map}
        !           105: 
        !           106: \\[gdb-display-frame] displays in the other window
        !           107: the last line referred to in the gdb buffer.
        !           108: 
        !           109: \\[gdb-step],\\[gdb-next], and \\[gdb-nexti] in the gdb window,
        !           110: call gdb to step,next or nexti and then update the other window
        !           111: with the current file and position.
        !           112: 
        !           113: If you are in a source file, you may select a point to break
        !           114: at, by doing \\[gdb-break].
        !           115: 
        !           116: Commands:
        !           117: Many commands are inherited from shell mode. 
        !           118: Additionally we have:
        !           119: 
        !           120: \\[gdb-display-frame] display frames file in other window
        !           121: \\[gdb-step] advance one line in program
        !           122: \\[gdb-next] advance one line in program (skip over calls).
        !           123: \\[send-gdb-command] used for special printing of an arg at the current point.
        !           124: C-x SPACE sets break point at current line."
        !           125:   (interactive)
        !           126:   (kill-all-local-variables)
        !           127:   (setq major-mode 'gdb-mode)
        !           128:   (setq mode-name "Inferior Gdb")
        !           129:   (setq mode-line-process '(": %s"))
        !           130:   (use-local-map gdb-mode-map)
        !           131:   (make-local-variable 'last-input-start)
        !           132:   (setq last-input-start (make-marker))
        !           133:   (make-local-variable 'last-input-end)
        !           134:   (setq last-input-end (make-marker))
        !           135:   (make-local-variable 'gdb-last-frame)
        !           136:   (setq gdb-last-frame nil)
        !           137:   (make-local-variable 'gdb-last-frame-displayed-p)
        !           138:   (setq gdb-last-frame-displayed-p t)
        !           139:   (make-local-variable 'gdb-delete-prompt-marker)
        !           140:   (setq gdb-delete-prompt-marker nil)
        !           141:   (make-local-variable 'gdb-filter-accumulator)
        !           142:   (setq gdb-filter-accumulator nil)
        !           143:   (make-local-variable 'shell-prompt-pattern)
        !           144:   (setq shell-prompt-pattern gdb-prompt-pattern)
        !           145:   (run-hooks 'shell-mode-hook 'gdb-mode-hook))
        !           146: 
        !           147: (defvar current-gdb-buffer nil)
        !           148: 
        !           149: (defvar gdb-command-name "gdb"
        !           150:   "Pathname for executing gdb.")
        !           151: 
        !           152: (defun gdb (path)
        !           153:   "Run gdb on program FILE in buffer *gdb-FILE*.
        !           154: The directory containing FILE becomes the initial working directory
        !           155: and source-file directory for GDB.  If you wish to change this, use
        !           156: the GDB commands `cd DIR' and `directory'."
        !           157:   (interactive "FRun gdb on file: ")
        !           158:   (setq path (expand-file-name path))
        !           159:   (let ((file (file-name-nondirectory path)))
        !           160:     (switch-to-buffer (concat "*gdb-" file "*"))
        !           161:     (setq default-directory (file-name-directory path))
        !           162:     (or (bolp) (newline))
        !           163:     (insert "Current directory is " default-directory "\n")
        !           164:     (make-shell (concat "gdb-" file) gdb-command-name nil "-fullname"
        !           165:                "-cd" default-directory file)
        !           166:     (gdb-mode)
        !           167:     (set-process-filter (get-buffer-process (current-buffer)) 'gdb-filter)
        !           168:     (set-process-sentinel (get-buffer-process (current-buffer)) 'gdb-sentinel)
        !           169:     (gdb-set-buffer)))
        !           170: 
        !           171: (defun gdb-set-buffer ()
        !           172:   (cond ((eq major-mode 'gdb-mode)
        !           173:        (setq current-gdb-buffer (current-buffer)))))
        !           174: 
        !           175: ;; This function is responsible for inserting output from GDB
        !           176: ;; into the buffer.
        !           177: ;; Aside from inserting the text, it notices and deletes
        !           178: ;; each filename-and-line-number;
        !           179: ;; that GDB prints to identify the selected frame.
        !           180: ;; It records the filename and line number, and maybe displays that file.
        !           181: (defun gdb-filter (proc string)
        !           182:   (let ((inhibit-quit t))
        !           183:     (if gdb-filter-accumulator
        !           184:        (gdb-filter-accumulate-marker proc
        !           185:                                      (concat gdb-filter-accumulator string))
        !           186:        (gdb-filter-scan-input proc string))))
        !           187: 
        !           188: (defun gdb-filter-accumulate-marker (proc string)
        !           189:   (setq gdb-filter-accumulator nil)
        !           190:   (if (> (length string) 1)
        !           191:       (if (= (aref string 1) ?\032)
        !           192:          (let ((end (string-match "\n" string)))
        !           193:            (if end
        !           194:                (progn
        !           195:                  (let* ((first-colon (string-match ":" string 2))
        !           196:                         (second-colon
        !           197:                          (string-match ":" string (1+ first-colon))))
        !           198:                    (setq gdb-last-frame
        !           199:                          (cons (substring string 2 first-colon)
        !           200:                                (string-to-int
        !           201:                                 (substring string (1+ first-colon)
        !           202:                                            second-colon)))))
        !           203:                  (setq gdb-last-frame-displayed-p nil)
        !           204:                  (gdb-filter-scan-input proc
        !           205:                                         (substring string (1+ end))))
        !           206:              (setq gdb-filter-accumulator string)))
        !           207:        (gdb-filter-insert proc "\032")
        !           208:        (gdb-filter-scan-input proc (substring string 1)))
        !           209:     (setq gdb-filter-accumulator string)))
        !           210: 
        !           211: (defun gdb-filter-scan-input (proc string)
        !           212:   (if (equal string "")
        !           213:       (setq gdb-filter-accumulator nil)
        !           214:       (let ((start (string-match "\032" string)))
        !           215:        (if start
        !           216:            (progn (gdb-filter-insert proc (substring string 0 start))
        !           217:                   (gdb-filter-accumulate-marker proc
        !           218:                                                 (substring string start)))
        !           219:            (gdb-filter-insert proc string)))))
        !           220: 
        !           221: (defun gdb-filter-insert (proc string)
        !           222:   (let ((moving (= (point) (process-mark proc)))
        !           223:        (output-after-point (< (point) (process-mark proc)))
        !           224:        (old-buffer (current-buffer))
        !           225:        start)
        !           226:     (set-buffer (process-buffer proc))
        !           227:     (unwind-protect
        !           228:        (save-excursion
        !           229:          ;; Insert the text, moving the process-marker.
        !           230:          (goto-char (process-mark proc))
        !           231:          (setq start (point))
        !           232:          (insert string)
        !           233:          (set-marker (process-mark proc) (point))
        !           234:          (gdb-maybe-delete-prompt)
        !           235:          ;; Check for a filename-and-line number.
        !           236:          (gdb-display-frame
        !           237:           ;; Don't display the specified file
        !           238:           ;; unless (1) point is at or after the position where output appears
        !           239:           ;; and (2) this buffer is on the screen.
        !           240:           (or output-after-point
        !           241:               (not (get-buffer-window (current-buffer))))
        !           242:           ;; Display a file only when a new filename-and-line-number appears.
        !           243:           t))
        !           244:       (set-buffer old-buffer))
        !           245:     (if moving (goto-char (process-mark proc)))))
        !           246: 
        !           247: (defun gdb-sentinel (proc msg)
        !           248:   (cond ((null (buffer-name (process-buffer proc)))
        !           249:         ;; buffer killed
        !           250:         ;; Stop displaying an arrow in a source file.
        !           251:         (setq overlay-arrow-position nil)
        !           252:         (set-process-buffer proc nil))
        !           253:        ((memq (process-status proc) '(signal exit))
        !           254:         ;; Stop displaying an arrow in a source file.
        !           255:         (setq overlay-arrow-position nil)
        !           256:         ;; Fix the mode line.
        !           257:         (setq mode-line-process
        !           258:               (concat ": "
        !           259:                       (symbol-name (process-status proc))))
        !           260:         (let* ((obuf (current-buffer)))
        !           261:           ;; save-excursion isn't the right thing if
        !           262:           ;;  process-buffer is current-buffer
        !           263:           (unwind-protect
        !           264:               (progn
        !           265:                 ;; Write something in *compilation* and hack its mode line,
        !           266:                 (set-buffer (process-buffer proc))
        !           267:                 ;; Force mode line redisplay soon
        !           268:                 (set-buffer-modified-p (buffer-modified-p))
        !           269:                 (if (eobp)
        !           270:                     (insert ?\n mode-name " " msg)
        !           271:                   (save-excursion
        !           272:                     (goto-char (point-max))
        !           273:                     (insert ?\n mode-name " " msg)))
        !           274:                 ;; If buffer and mode line will show that the process
        !           275:                 ;; is dead, we can delete it now.  Otherwise it
        !           276:                 ;; will stay around until M-x list-processes.
        !           277:                 (delete-process proc))
        !           278:             ;; Restore old buffer, but don't restore old point
        !           279:             ;; if obuf is the gdb buffer.
        !           280:             (set-buffer obuf))))))
        !           281: 
        !           282: 
        !           283: (defun gdb-refresh ()
        !           284:   "Fix up a possibly garbled display, and redraw the arrow."
        !           285:   (interactive)
        !           286:   (redraw-display)
        !           287:   (gdb-display-frame))
        !           288: 
        !           289: (defun gdb-display-frame (&optional nodisplay noauto)
        !           290:   "Find, obey and delete the last filename-and-line marker from GDB.
        !           291: The marker looks like \\032\\032FILENAME:LINE:CHARPOS\\n.
        !           292: Obeying it means displaying in another window the specified file and line."
        !           293:   (interactive)
        !           294:   (gdb-set-buffer)
        !           295:   (and gdb-last-frame (not nodisplay)
        !           296:        (or (not gdb-last-frame-displayed-p) (not noauto))
        !           297:        (progn (gdb-display-line (car gdb-last-frame) (cdr gdb-last-frame))
        !           298:              (setq gdb-last-frame-displayed-p t))))
        !           299: 
        !           300: ;; Make sure the file named TRUE-FILE is in a buffer that appears on the screen
        !           301: ;; and that its line LINE is visible.
        !           302: ;; Put the overlay-arrow on the line LINE in that buffer.
        !           303: 
        !           304: (defun gdb-display-line (true-file line)
        !           305:   (let* ((buffer (find-file-noselect true-file))
        !           306:         (window (display-buffer buffer t))
        !           307:         (pos))
        !           308:     (save-excursion
        !           309:       (set-buffer buffer)
        !           310:       (save-restriction
        !           311:        (widen)
        !           312:        (goto-line line)
        !           313:        (setq pos (point))
        !           314:        (setq overlay-arrow-string "=>")
        !           315:        (or overlay-arrow-position
        !           316:            (setq overlay-arrow-position (make-marker)))
        !           317:        (set-marker overlay-arrow-position (point) (current-buffer)))
        !           318:       (cond ((or (< pos (point-min)) (> pos (point-max)))
        !           319:             (widen)
        !           320:             (goto-char pos))))
        !           321:     (set-window-point window overlay-arrow-position)))
        !           322: 
        !           323: (defun gdb-call (command)
        !           324:   "Invoke gdb COMMAND displaying source in other window."
        !           325:   (interactive)
        !           326:   (goto-char (point-max))
        !           327:   (setq gdb-delete-prompt-marker (point-marker))
        !           328:   (gdb-set-buffer)
        !           329:   (send-string (get-buffer-process current-gdb-buffer)
        !           330:               (concat command "\n")))
        !           331: 
        !           332: (defun gdb-maybe-delete-prompt ()
        !           333:   (if (and gdb-delete-prompt-marker
        !           334:           (> (point-max) (marker-position gdb-delete-prompt-marker)))
        !           335:       (let (start)
        !           336:        (goto-char gdb-delete-prompt-marker)
        !           337:        (setq start (point))
        !           338:        (beginning-of-line)
        !           339:        (delete-region (point) start)
        !           340:        (setq gdb-delete-prompt-marker nil))))
        !           341: 
        !           342: (defun gdb-break ()
        !           343:   "Set GDB breakpoint at this source line."
        !           344:   (interactive)
        !           345:   (let ((file-name (file-name-nondirectory buffer-file-name))
        !           346:        (line (save-restriction
        !           347:                (widen)
        !           348:                (1+ (count-lines 1 (point))))))
        !           349:     (send-string (get-buffer-process current-gdb-buffer)
        !           350:                 (concat "break " file-name ":" line "\n"))))
        !           351: 
        !           352: (defun gdb-read-address()
        !           353:   "Return a string containing the core-address found in the buffer at point."
        !           354:   (save-excursion
        !           355:    (let ((pt (dot)) found begin)
        !           356:      (setq found (if (search-backward "0x" (- pt 7) t)(dot)))
        !           357:      (cond (found (forward-char 2)(setq result
        !           358:                        (buffer-substring found
        !           359:                                 (progn (re-search-forward "[^0-9a-f]")
        !           360:                                        (forward-char -1)
        !           361:                                        (dot)))))
        !           362:           (t (setq begin (progn (re-search-backward "[^0-9]") (forward-char 1)
        !           363:                                 (dot)))
        !           364:              (forward-char 1)
        !           365:              (re-search-forward "[^0-9]")
        !           366:              (forward-char -1)
        !           367:              (buffer-substring begin (dot)))))))
        !           368: 
        !           369: 
        !           370: (defvar gdb-commands nil
        !           371:   "List of strings or functions used by send-gdb-command.
        !           372: It is for customization by you.")
        !           373: 
        !           374: (defun send-gdb-command (arg)
        !           375: 
        !           376:   "This command reads the number where the cursor is positioned.  It
        !           377:  then inserts this ADDR at the end of the gdb buffer.  A numeric arg
        !           378:  selects the ARG'th member COMMAND of the list gdb-print-command.  If
        !           379:  COMMAND is a string, (format COMMAND ADDR) is inserted, otherwise
        !           380:  (funcall COMMAND ADDR) is inserted.  eg. \"p (rtx)%s->fld[0].rtint\"
        !           381:  is a possible string to be a member of gdb-commands.  "
        !           382: 
        !           383: 
        !           384:   (interactive "P")
        !           385:   (let (comm addr)
        !           386:     (if arg (setq comm (nth arg gdb-commands)))
        !           387:     (setq addr (gdb-read-address))
        !           388:     (if (eq (current-buffer) current-gdb-buffer)
        !           389:        (set-mark (point)))
        !           390:     (cond (comm
        !           391:           (setq comm
        !           392:                 (if (stringp comm) (format comm addr) (funcall comm addr))))
        !           393:          (t (setq comm addr)))
        !           394:     (switch-to-buffer current-gdb-buffer)
        !           395:     (goto-char (dot-max))
        !           396:     (insert-string comm)))

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