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Nick Roberts 2009-09-25 01:53:34 +00:00
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gdb/mi/gdb-mi.el
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;;; gdb-mi.el
;; Author: Nick Roberts <nickrob@gnu.org>
;; Maintainer: Nick Roberts <nickrob@gnu.org>
;; Keywords: unix, tools
;; Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009
;; Free Software Foundation, Inc.
;; This file is part of GNU GDB.
;; GNU GDB 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 2, or (at your option)
;; any later version.
;; This program 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.
;;; Commentary:
;; This mode acts as a graphical user interface to GDB and works with Emacs
;; 22.x and the version of GDB with which it is distributed. You can interact
;; with GDB through the GUD buffer in the usual way, but there are also
;; buffers which control the execution and describe the state of your program.
;; It separates the input/output of your program from that of GDB and displays
;; expressions and their current values in their own buffers. It also uses
;; features of Emacs 21 such as the fringe/display margin for breakpoints, and
;; the toolbar (see the GDB Graphical Interface section in the Emacs info
;; manual).
;; Start the debugger with M-x gdbmi.
;; This file uses GDB/MI as the primary interface to GDB. It is still under
;; development and is part of a process to migrate Emacs from annotations (as
;; used in gdb-ui.el) to GDB/MI. It runs gdb with GDB/MI (-interp=mi) and
;; access CLI using "-interpreter-exec console cli-command".
;; This mode acts on top of gdb-ui.el. After the release of 22.1,
;; mainline Emacs in the CVS repository will have a file also called gdb-mi.el
;; which will *replace* gdb-ui.el. If you are interested in developing
;; this mode you should get this version.
;;
;; Known Bugs:
;;
;; 1) To handle program input, if required, and to avoid extra output in the
;; GUD buffer you must not use run, step, next or continue etc but their MI
;; counterparts through gud-run, gud-step etc, e.g clicking on the appropriate
;; icon in the toolbar.
;; 2) Some commands send extra prompts to the GUD buffer.
;; 3) Doesn't list catchpoints in breakpoints buffer.
;;
;; TODO:
;; 1) Prefix MI commands with a token instead of queueing commands.
;; 2) Use MI command -data-read-memory for memory window.
;; 3) Use MI command -data-disassemble for disassembly window.
;; 4) Allow separate buffers for Inferior IO and GDB IO.
;; 5) Watch windows to work with threads.
;;
;;; Code:
(require 'gud)
(require 'gdb-ui)
(defvar gdb-last-command nil)
(defvar gdb-prompt-name nil)
;;;###autoload
(defun gdbmi (command-line)
"Run gdb on program FILE in buffer *gud-FILE*.
The directory containing FILE becomes the initial working directory
and source-file directory for your debugger.
If `gdb-many-windows' is nil (the default value) then gdb just
pops up the GUD buffer unless `gdb-show-main' is t. In this case
it starts with two windows: one displaying the GUD buffer and the
other with the source file with the main routine of the inferior.
If `gdb-many-windows' is t, regardless of the value of
`gdb-show-main', the layout below will appear. Keybindings are
given in relevant buffer.
Watch expressions appear in the speedbar/slowbar.
The following commands help control operation :
`gdb-many-windows' - Toggle the number of windows gdb uses.
`gdb-restore-windows' - To restore the window layout.
See Info node `(emacs)GDB Graphical Interface' for a more
detailed description of this mode.
+--------------------------------------------------------------+
| GDB Toolbar |
+-------------------------------+------------------------------+
| GUD buffer (I/O of GDB) | Locals buffer |
| | |
| | |
| | |
+-------------------------------+------------------------------+
| Source buffer |
| |
| |
| |
| |
| |
| |
| |
+-------------------------------+------------------------------+
| Stack buffer | Breakpoints buffer |
| RET gdb-frames-select | SPC gdb-toggle-breakpoint |
| | RET gdb-goto-breakpoint |
| | d gdb-delete-breakpoint |
+-------------------------------+------------------------------+"
;;
(interactive (list (gud-query-cmdline 'gdbmi)))
;;
;; Let's start with a basic gud-gdb buffer and then modify it a bit.
(gdb command-line)
;;
(setq gdb-debug-ring nil)
(set (make-local-variable 'gud-minor-mode) 'gdbmi)
(set (make-local-variable 'gud-marker-filter) 'gud-gdbmi-marker-filter)
;;
(gud-def gud-step "-exec-step %p" "\C-s"
"Step one source line with display.")
(gud-def gud-stepi "-exec-step-instruction %p" "\C-i"
"Step one instruction with display.")
(gud-def gud-next "-exec-next %p" "\C-n"
"Step one line (skip functions).")
(gud-def gud-cont "-exec-continue" "\C-r"
"Continue with display.")
(gud-def gud-finish "-exec-finish" "\C-f"
"Finish executing current function.")
(gud-def gud-run "-exec-run" nil "Run the program.")
(gud-def gud-break (if (not (string-equal mode-name "Machine"))
(gud-call "break %f:%l" arg)
(save-excursion
(beginning-of-line)
(forward-char 2)
(gud-call "break *%a" arg)))
"\C-b" "Set breakpoint at current line or address.")
;;
(gud-def gud-remove (if (not (string-equal mode-name "Machine"))
(gud-call "clear %f:%l" arg)
(save-excursion
(beginning-of-line)
(forward-char 2)
(gud-call "clear *%a" arg)))
"\C-d" "Remove breakpoint at current line or address.")
;;
(gud-def gud-until (if (not (string-equal mode-name "Machine"))
(gud-call "-exec-until %f:%l" arg)
(save-excursion
(beginning-of-line)
(forward-char 2)
(gud-call "-exec-until *%a" arg)))
"\C-u" "Continue to current line or address.")
(define-key gud-minor-mode-map [left-margin mouse-1]
'gdb-mouse-set-clear-breakpoint)
(define-key gud-minor-mode-map [left-fringe mouse-1]
'gdb-mouse-set-clear-breakpoint)
(define-key gud-minor-mode-map [left-fringe mouse-2]
'gdb-mouse-until)
(define-key gud-minor-mode-map [left-fringe drag-mouse-1]
'gdb-mouse-until)
(define-key gud-minor-mode-map [left-margin mouse-3]
'gdb-mouse-toggle-breakpoint-margin)
(define-key gud-minor-mode-map [left-fringe mouse-3]
'gdb-mouse-toggle-breakpoint-fringe)
(setq comint-input-sender 'gdbmi-send)
;;
;; (re-)initialise
(setq gdb-pc-address (if gdb-show-main "main" nil)
gdb-previous-frame-address nil
gdb-memory-address "main"
gdb-previous-frame nil
gdb-selected-frame nil
gdb-frame-number nil
gdb-var-list nil
gdb-prompting nil
gdb-input-queue nil
gdb-current-item nil
gdb-pending-triggers nil
gdb-output-sink 'user
gdb-server-prefix nil
gdb-flush-pending-output nil
gdb-location-alist nil
gdb-source-file-list nil
gdb-last-command nil
gdb-prompt-name nil
gdb-buffer-fringe-width (car (window-fringes)))
gdb-debug-ring nil
gdb-source-window nil
gdb-inferior-status nil
gdb-continuation nil
;;
(setq gdb-buffer-type 'gdbmi)
;;
;; FIXME: use tty command to separate io.
;;(gdb-clear-inferior-io)
;;
(if (eq window-system 'w32)
(gdb-enqueue-input (list "-gdb-set new-console off\n" 'ignore)))
(gdb-enqueue-input (list "-gdb-set height 0\n" 'ignore))
;; find source file and compilation directory here
(gdb-enqueue-input
; Needs GDB 6.2 onwards.
(list "-file-list-exec-source-files\n"
'gdb-set-gud-minor-mode-existing-buffers-1))
(gdb-enqueue-input
; Needs GDB 6.0 onwards.
(list "-file-list-exec-source-file\n" 'gdb-get-source-file))
(gdb-enqueue-input
(list "-data-list-register-names\n" 'gdb-get-register-names))
(gdb-enqueue-input
(list "-gdb-show prompt\n" 'gdb-get-prompt))
;;
(setq gdb-locals-font-lock-keywords gdb-locals-font-lock-keywords-2)
(run-hooks 'gdbmi-mode-hook))
(defun gdbmi-send (proc string)
"A comint send filter for gdb."
(if gud-running
(process-send-string proc (concat string "\n"))
(with-current-buffer gud-comint-buffer
(let ((inhibit-read-only t))
(remove-text-properties (point-min) (point-max) '(face))))
(setq gdb-output-sink 'user)
(setq gdb-prompting nil)
;; mimic <RET> key to repeat previous command in GDB
(if (not (string-match "^\\s+$" string))
(setq gdb-last-command string)
(if gdb-last-command (setq string gdb-last-command)))
(if gdb-enable-debug
(push (cons 'mi-send (concat string "\n")) gdb-debug-ring))
(if (string-match "^-" string)
;; MI command
(process-send-string proc (concat string "\n"))
;; CLI command
(if (string-match "\\\\$" string)
(setq gdb-continuation (concat gdb-continuation string "\n"))
(process-send-string proc
(concat "-interpreter-exec console \""
gdb-continuation string "\"\n"))
(setq gdb-continuation nil)))))
(defcustom gud-gdbmi-command-name "gdb -interp=mi"
"Default command to execute an executable under the GDB-UI debugger."
:type 'string
:group 'gud)
(defconst gdb-gdb-regexp "(gdb) \n")
(defconst gdb-running-regexp (concat "\\^running\n" gdb-gdb-regexp))
;; fullname added GDB 6.4+.
;; Probably not needed. -stack-info-frame computes filename and line.
(defconst gdb-stopped-regexp
"\\*stopped,reason=.*?,file=\".*?\"\
,fullname=\"\\(.*?\\)\",line=\"\\(.*?\\)\"}\n")
(defconst gdb-error-regexp "\\^error,msg=\\(\".+\"\\)\n")
(defconst gdb-done-regexp "\\^done,*\n*")
(defconst gdb-console-regexp "~\\(\".*?[^\\]\"\\)\n")
(defconst gdb-internals-regexp "&\\(\".*?\\n\"\\)\n")
(defun gdbmi-prompt1 ()
"Queue any GDB commands that the user interface needs."
(unless gdb-pending-triggers
(gdbmi-get-selected-frame)
(gdbmi-invalidate-frames)
(gdbmi-invalidate-breakpoints)
(gdb-get-changed-registers)
(gdb-invalidate-registers-1)
(gdb-invalidate-locals-1)
(if (and (boundp 'speedbar-frame) (frame-live-p speedbar-frame))
(gdb-var-update-1))))
(defun gdbmi-prompt2 ()
"Handle any output and send next GDB command."
(let ((sink gdb-output-sink))
(when (eq sink 'emacs)
(let ((handler
(car (cdr gdb-current-item))))
(with-current-buffer (gdb-get-buffer-create 'gdb-partial-output-buffer)
(funcall handler)))))
(let ((input (gdb-dequeue-input)))
(if input
(gdb-send-item input)
(progn
(setq gud-running nil)
(setq gdb-prompting t)
(gud-display-frame)))))
(defun gud-gdbmi-marker-filter (string)
"Filter GDB/MI output."
(if gdb-flush-pending-output
nil
(if gdb-enable-debug (push (cons 'recv (list string gdb-output-sink))
gdb-debug-ring))
;; Recall the left over gud-marker-acc from last time
(setq gud-marker-acc (concat gud-marker-acc string))
;; Start accumulating output for the GUD buffer
(let ((output "") running)
(if (string-match gdb-running-regexp gud-marker-acc)
(setq
gud-marker-acc
(concat (substring gud-marker-acc 0 (match-beginning 0))
(substring gud-marker-acc (match-end 0)))
running t))
(if (string-match gdb-stopped-regexp gud-marker-acc)
(setq
;; Extract the frame position from the marker.
gud-last-frame (cons (match-string 1 gud-marker-acc)
(string-to-number
(match-string 2 gud-marker-acc)))
gud-marker-acc
(concat (substring gud-marker-acc 0 (match-beginning 0))
(substring gud-marker-acc (match-end 0)))))
;; Filter error messages going to GUD buffer and
;; display in minibuffer.
(when (eq gdb-output-sink 'user)
(while (string-match gdb-error-regexp gud-marker-acc)
(message (read (match-string 1 gud-marker-acc)))
(setq
gud-marker-acc
(concat (substring gud-marker-acc 0 (match-beginning 0))
(substring gud-marker-acc (match-end 0)))))
(if (string-match gdb-done-regexp gud-marker-acc)
(setq
gud-marker-acc
(concat (substring gud-marker-acc 0 (match-beginning 0))
(substring gud-marker-acc (match-end 0))))))
(when (string-match gdb-gdb-regexp gud-marker-acc)
(setq
gud-marker-acc
(concat (substring gud-marker-acc 0 (match-beginning 0))
(substring gud-marker-acc (match-end 0))))
;; Remove the trimmings from the console stream.
(while (string-match gdb-console-regexp gud-marker-acc)
(setq
gud-marker-acc (concat
(substring gud-marker-acc 0 (match-beginning 0))
(read (match-string 1 gud-marker-acc))
(substring gud-marker-acc (match-end 0)))))
;; Remove the trimmings from log stream containing debugging messages
;; being produced by GDB's internals and use warning face.
(while (string-match gdb-internals-regexp gud-marker-acc)
(setq
gud-marker-acc
(concat (substring gud-marker-acc 0 (match-beginning 0))
(let ((error-message
(read (match-string 1 gud-marker-acc))))
(put-text-property
0 (length error-message)
'face font-lock-warning-face
error-message)
error-message)
(substring gud-marker-acc (match-end 0)))))
(setq output (gdbmi-concat-output output gud-marker-acc))
(setq gud-marker-acc "")
(gdbmi-prompt1)
(unless gdb-input-queue
(setq output (concat output gdb-prompt-name)))
(gdbmi-prompt2)
(setq gud-running running))
(when gud-running
(setq output (gdbmi-concat-output output gud-marker-acc))
(setq gud-marker-acc ""))
output)))
(defun gdbmi-concat-output (so-far new)
(let ((sink gdb-output-sink))
(cond
((eq sink 'user) (concat so-far new))
((eq sink 'emacs)
(gdb-append-to-partial-output new)
so-far)
((eq sink 'inferior)
(gdb-append-to-inferior-io new)
so-far))))
;; Breakpoint buffer : This displays the output of `-break-list'.
;;
(def-gdb-auto-update-trigger gdbmi-invalidate-breakpoints
(gdb-get-buffer 'gdb-breakpoints-buffer)
"-break-list\n"
gdb-break-list-handler)
(defconst gdb-break-list-regexp
"bkpt={.*?number=\"\\(.*?\\)\",.*?type=\"\\(.*?\\)\",.*?disp=\"\\(.*?\\)\",.*?\
enabled=\"\\(.\\)\",.*?addr=\"\\(.*?\\)\",\\(?:.*?func=\"\\(.*?\\)\",.*?\
file=\"\\(.*?\\)\",.*?fullname=\".*?\",.*?line=\"\\(.*?\\)\",\
\\|\\(?:.*?what=\"\\(.*?\\)\",\\)*\\).*?times=\"\\(.*?\\)\".*?}")
(defun gdb-break-list-handler ()
(setq gdb-pending-triggers (delq 'gdbmi-invalidate-breakpoints
gdb-pending-triggers))
(let ((breakpoint) (breakpoints-list))
(with-current-buffer (gdb-get-buffer-create 'gdb-partial-output-buffer)
(goto-char (point-min))
(while (re-search-forward gdb-break-list-regexp nil t)
(let ((breakpoint (list (match-string 1)
(match-string 2)
(match-string 3)
(match-string 4)
(match-string 5)
(match-string 6)
(match-string 7)
(match-string 8)
(match-string 9)
(match-string 10))))
(push breakpoint breakpoints-list))))
(let ((buf (gdb-get-buffer 'gdb-breakpoints-buffer)))
(and buf (with-current-buffer buf
(let ((p (point))
(buffer-read-only nil))
(erase-buffer)
(insert "Num Type Disp Enb Hits Addr What\n")
(dolist (breakpoint breakpoints-list)
(insert
(concat
(nth 0 breakpoint) " "
(nth 1 breakpoint) " "
(nth 2 breakpoint) " "
(nth 3 breakpoint) " "
(nth 9 breakpoint) " "
(nth 4 breakpoint) " "
(if (nth 5 breakpoint)
(concat "in " (nth 5 breakpoint) " at " (nth 6 breakpoint) ":" (nth 7 breakpoint) "\n")
(concat (nth 8 breakpoint) "\n")))))
(goto-char p))))))
(gdb-info-breakpoints-custom))
(defun gdbmi-get-location (bptno line flag)
"Find the directory containing the relevant source file.
Put in buffer and place breakpoint icon."
(goto-char (point-min))
(catch 'file-not-found
(if (re-search-forward gdb-source-file-regexp-1 nil t)
(delete (cons bptno "File not found") gdb-location-alist)
(push (cons bptno (match-string 1)) gdb-location-alist)
(gdb-resync)
(unless (assoc bptno gdb-location-alist)
(push (cons bptno "File not found") gdb-location-alist)
(message-box "Cannot find source file for breakpoint location.
Add directory to search path for source files using the GDB command, dir."))
(throw 'file-not-found nil))
(with-current-buffer
(find-file-noselect (match-string 1))
(save-current-buffer
(set (make-local-variable 'gud-minor-mode) 'gdbmi)
(set (make-local-variable 'tool-bar-map) gud-tool-bar-map))
;; only want one breakpoint icon at each location
(save-excursion
(goto-line (string-to-number line))
(gdb-put-breakpoint-icon (eq flag ?y) bptno)))))
;; Frames buffer. This displays a perpetually correct bactrack trace.
;;
(def-gdb-auto-update-trigger gdbmi-invalidate-frames
(gdb-get-buffer 'gdb-stack-buffer)
"-stack-list-frames\n"
gdb-stack-list-frames-handler)
(defconst gdb-stack-list-frames-regexp
"{.*?level=\"\\(.*?\\)\",.*?addr=\"\\(.*?\\)\",.*?func=\"\\(.*?\\)\",\
\\(?:.*?file=\".*?\",.*?fullname=\"\\(.*?\\)\",.*?line=\"\\(.*?\\)\".*?}\\|\
from=\"\\(.*?\\)\"\\)")
(defun gdb-stack-list-frames-handler ()
(setq gdb-pending-triggers (delq 'gdbmi-invalidate-frames
gdb-pending-triggers))
(let ((frame nil)
(call-stack nil))
(with-current-buffer (gdb-get-buffer-create 'gdb-partial-output-buffer)
(goto-char (point-min))
(while (re-search-forward gdb-stack-list-frames-regexp nil t)
(let ((frame (list (match-string 1)
(match-string 2)
(match-string 3)
(match-string 4)
(match-string 5)
(match-string 6))))
(push frame call-stack))))
(let ((buf (gdb-get-buffer 'gdb-stack-buffer)))
(and buf (with-current-buffer buf
(let ((p (point))
(buffer-read-only nil))
(erase-buffer)
(insert "Level\tAddr\tFunc\tFile:Line\n")
(dolist (frame (nreverse call-stack))
(insert
(concat
(nth 0 frame) "\t"
(nth 1 frame) "\t"
(propertize (nth 2 frame)
'face font-lock-function-name-face) "\t"
(if (nth 3 frame)
(concat "at "(nth 3 frame) ":" (nth 4 frame) "\n")
(concat "from " (nth 5 frame) "\n")))))
(goto-char p))))))
(gdb-stack-list-frames-custom))
(defun gdb-stack-list-frames-custom ()
(with-current-buffer (gdb-get-buffer 'gdb-stack-buffer)
(save-excursion
(let ((buffer-read-only nil))
(goto-char (point-min))
(forward-line 1)
(while (< (point) (point-max))
(add-text-properties (point-at-bol) (point-at-eol)
'(mouse-face highlight
help-echo "mouse-2, RET: Select frame"))
(beginning-of-line)
(when (and (looking-at "^[0-9]+\\s-+\\(\\S-+\\)")
(equal (match-string 1) gdb-selected-frame))
(put-text-property (point-at-bol) (point-at-eol)
'face '(:inverse-video t)))
(forward-line 1))))))
;; gdb-ui.el uses "info source" to find out if macro information is present.
(defun gdb-get-source-file ()
"Find the source file where the program starts and display it with related
buffers, if required."
(goto-char (point-min))
(if (re-search-forward gdb-source-file-regexp-1 nil t)
(setq gdb-main-file (match-string 1)))
(if gdb-many-windows
(gdb-setup-windows)
(gdb-get-buffer-create 'gdb-breakpoints-buffer)
(if gdb-show-main
(let ((pop-up-windows t))
(display-buffer (gud-find-file gdb-main-file))))))
(defun gdbmi-get-selected-frame ()
(if (not (member 'gdbmi-get-selected-frame gdb-pending-triggers))
(progn
(gdb-enqueue-input
(list "-stack-info-frame\n" 'gdbmi-frame-handler))
(push 'gdbmi-get-selected-frame
gdb-pending-triggers))))
(defun gdbmi-frame-handler ()
(setq gdb-pending-triggers
(delq 'gdbmi-get-selected-frame gdb-pending-triggers))
(with-current-buffer (gdb-get-buffer-create 'gdb-partial-output-buffer)
(goto-char (point-min))
(when (re-search-forward gdb-stack-list-frames-regexp nil t)
(setq gdb-frame-number (match-string 1))
(setq gdb-pc-address (match-string 2))
(setq gdb-selected-frame (match-string 3))
(when (match-string 4)
(setq gud-last-frame
(cons (match-string 4) (string-to-number (match-string 5))))
(gud-display-frame)
(if gud-overlay-arrow-position
(let ((buffer (marker-buffer gud-overlay-arrow-position))
(position (marker-position gud-overlay-arrow-position)))
(when buffer
(with-current-buffer buffer
(setq fringe-indicator-alist
(if (string-equal gdb-frame-number "0")
nil
'((overlay-arrow . hollow-right-triangle))))
(setq gud-overlay-arrow-position (make-marker))
(set-marker gud-overlay-arrow-position position))))))
(if (gdb-get-buffer 'gdb-locals-buffer)
(with-current-buffer (gdb-get-buffer 'gdb-locals-buffer)
(setq mode-name (concat "Locals:" gdb-selected-frame))))
(if (gdb-get-buffer 'gdb-assembler-buffer)
(with-current-buffer (gdb-get-buffer 'gdb-assembler-buffer)
(setq mode-name (concat "Machine:" gdb-selected-frame)))))))
(defvar gdb-prompt-name-regexp "value=\"\\(.*?\\)\"")
(defun gdb-get-prompt ()
"Find prompt for GDB session."
(goto-char (point-min))
(setq gdb-prompt-name nil)
(re-search-forward gdb-prompt-name-regexp nil t)
(setq gdb-prompt-name (match-string 1)))
(provide 'gdb-mi)
;;; gdbmi.el ends here