;;; gdb-ui.el --- User Interface for running GDB

;; Author: Nick Roberts <nickrob@gnu.org>
;; Maintainer: FSF
;; Keywords: unix, tools

;; Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008
;; 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 3, 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, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.

;;; Commentary:

;; This mode acts as a graphical user interface to GDB.  You can interact with
;; GDB through the GUD buffer in the usual way, but there are also further
;; buffers which control the execution and describe the state of your program.
;; It separates the input/output of your program from that of GDB, if
;; required, and watches expressions in the speedbar.  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).

;; By default, M-x gdb will start the debugger.

;; This file has evolved from gdba.el that was included with GDB 5.0 and
;; written by Tom Lord and Jim Kingdon.  It uses GDB's annotation interface.
;; You don't need to know about annotations to use this mode as a debugger,
;; but if you are interested developing the mode itself, see the Annotations
;; section in the GDB info manual.

;; GDB developers plan to make the annotation interface obsolete.  A new
;; interface called GDB/MI (machine interface) has been designed to replace it.
;; Some GDB/MI commands are used in this file through the CLI command
;; 'interpreter mi <mi-command>'.  To help with the process of fully migrating
;; Emacs from annotations to GDB/MI, there is an experimental package called
;; gdb-mi in the Emacs Lisp Package Archive ("http://tromey.com/elpa/").  It
;; comprises of modified gud.el and a file called gdb-mi.el which replaces
;; gdb-ui.el.  When installed, this overrides the current files and invoking
;; M-x gdb will use GDB/MI directly (starts with "gdb -i=mi").  When deleted
;; ('d' followed by 'x' in Package Menu mode), the files are deleted and old
;; functionality restored.  This provides a convenient way to review the
;; current status/contribute to its improvement.  For someone who just wants to
;; use GDB, however, the current mode in Emacs 22 is a much better option.
;; There is also a file, also called gdb-mi.el, a version of which is included
;; the GDB distribution.  This will probably only work with versions
;; distributed with GDB 6.5 or later.  Unlike the version in ELPA it works on
;; top of gdb-ui.el and you can only start it with M-x gdbmi.

;; This mode SHOULD WORK WITH GDB 5.0 or later but you will NEED AT LEAST
;; GDB 6.0 to use watch expressions.  It works best with GDB 6.4 or later
;; where watch expressions will update more quickly.

;;; Windows Platforms:

;; If you are using Emacs and GDB on Windows you will need to flush the buffer
;; explicitly in your program if you want timely display of I/O in Emacs.
;; Alternatively you can make the output stream unbuffered, for example, by
;; using a macro:

;;           #ifdef UNBUFFERED
;;	     setvbuf (stdout, (char *) NULL, _IONBF, 0);
;;	     #endif

;; and compiling with -DUNBUFFERED while debugging.

;; If you are using Cygwin GDB and find that the source is not being displayed
;; in Emacs when you step through it, possible solutions are to:

;;   1) Use Cygwin X Windows and Cygwin Emacs.
;;        (Since 22.1 Emacs builds under Cygwin.)
;;   2) Use MinGW GDB instead.
;;   3) Use cygwin-mount.el

;;; Known Bugs:

;; 1) Cannot handle multiple debug sessions.
;; 2) If you wish to call procedures from your program in GDB
;;    e.g "call myproc ()", "p mysquare (5)" then use level 2 annotations
;;    "gdb --annotate=2 myprog" to keep source buffer/selected frame fixed.
;; 3) After detaching from a process, clicking on the "GO" icon on toolbar
;;    (gud-go) sends "continue" to GDB (should be "run").

;;; TODO:

;; 1) Use MI command -data-read-memory for memory window.
;; 2) Use tree-widget.el instead of the speedbar for watch-expressions?
;; 3) Mark breakpoint locations on scroll-bar of source buffer?

;;; Code:

(require 'gud)

(defvar tool-bar-map)
(defvar speedbar-initial-expansion-list-name)

(defvar gdb-pc-address nil "Initialization for Assembler buffer.
Set to \"main\" at start if `gdb-show-main' is t.")
(defvar gdb-frame-address nil "Identity of frame for watch expression.")
(defvar gdb-previous-frame-address nil)
(defvar gdb-memory-address "main")
(defvar gdb-previous-frame nil)
(defvar gdb-selected-frame nil)
(defvar gdb-frame-number nil)
(defvar gdb-current-language nil)
(defvar gdb-var-list nil
  "List of variables in watch window.
Each element has the form (VARNUM EXPRESSION NUMCHILD TYPE VALUE STATUS FP)
where STATUS is nil (`unchanged'), `changed' or `out-of-scope', FP the frame
address for root variables.")
(defvar gdb-main-file nil "Source file from which program execution begins.")
(defvar gud-old-arrow nil)
(defvar gdb-overlay-arrow-position nil)
(defvar gdb-stack-position nil)
(defvar gdb-server-prefix nil)
(defvar gdb-flush-pending-output nil)
(defvar gdb-location-alist nil
  "Alist of breakpoint numbers and full filenames.  Only used for files that
Emacs can't find.")
(defvar gdb-active-process nil
  "GUD tooltips display variable values when t, and macro definitions otherwise.")
(defvar gdb-error "Non-nil when GDB is reporting an error.")
(defvar gdb-macro-info nil
  "Non-nil if GDB knows that the inferior includes preprocessor macro info.")
(defvar gdb-buffer-fringe-width nil)
(defvar gdb-signalled nil)
(defvar gdb-source-window nil)
(defvar gdb-inferior-status nil)
(defvar gdb-continuation nil)
(defvar gdb-look-up-stack nil)
(defvar gdb-frame-begin nil
  "Non-nil when GDB generates frame-begin annotation.")
(defvar gdb-printing t)
(defvar gdb-parent-bptno-enabled nil)

(defvar gdb-buffer-type nil
  "One of the symbols bound in `gdb-buffer-rules'.")
(make-variable-buffer-local 'gdb-buffer-type)

(defvar gdb-input-queue ()
  "A list of gdb command objects.")

(defvar gdb-prompting nil
  "True when gdb is idle with no pending input.")

(defvar gdb-output-sink 'user
  "The disposition of the output of the current gdb command.
Possible values are these symbols:

    `user' -- gdb output should be copied to the GUD buffer
              for the user to see.

    `inferior' -- gdb output should be copied to the inferior-io buffer.

    `pre-emacs' -- output should be ignored util the post-prompt
                   annotation is received.  Then the output-sink
		   becomes:...
    `emacs' -- output should be collected in the partial-output-buffer
	       for subsequent processing by a command.  This is the
	       disposition of output generated by commands that
	       gdb mode sends to gdb on its own behalf.
    `post-emacs' -- ignore output until the prompt annotation is
		    received, then go to USER disposition.

gdba (gdb-ui.el) uses all five values, gdbmi (gdb-mi.el) only two
\(`user' and `emacs').")

(defvar gdb-current-item nil
  "The most recent command item sent to gdb.")

(defvar gdb-pending-triggers '()
  "A list of trigger functions that have run later than their output handlers.")

(defvar gdb-first-post-prompt nil)
(defvar gdb-version nil)
(defvar gdb-locals-font-lock-keywords nil)
(defvar gdb-source-file-list nil
  "List of source files for the current executable.")
(defconst gdb-error-regexp "\\^error,msg=\"\\(.+\\)\"")

(defvar gdb-locals-font-lock-keywords-1
  '(
    ;; var = (struct struct_tag) value
    ( "\\(^\\(\\sw\\|[_.]\\)+\\) += +(\\(struct\\) \\(\\(\\sw\\|[_.]\\)+\\)"
      (1 font-lock-variable-name-face)
      (3 font-lock-keyword-face)
      (4 font-lock-type-face))
    ;; var = (type) value
    ( "\\(^\\(\\sw\\|[_.]\\)+\\) += +(\\(\\(\\sw\\|[_.]\\)+\\)"
      (1 font-lock-variable-name-face)
      (3 font-lock-type-face))
    ;; var = val
    ( "\\(^\\(\\sw\\|[_.]\\)+\\) += +[^(]"
      (1 font-lock-variable-name-face))
    )
  "Font lock keywords used in `gdb-local-mode'.")

(defvar gdb-locals-font-lock-keywords-2
  '(
    ;; var = type value
    ( "\\(^\\(\\sw\\|[_.]\\)+\\)\t+\\(\\(\\sw\\|[_.]\\)+\\)"
      (1 font-lock-variable-name-face)
      (3 font-lock-type-face))
    )
  "Font lock keywords used in `gdb-local-mode'.")

;; Variables for GDB 6.4+
(defvar gdb-register-names nil "List of register names.")
(defvar gdb-changed-registers nil
  "List of changed register numbers (strings).")

;;;###autoload
(defun gdb (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 unless
`gdb-use-separate-io-buffer' is nil when the source buffer
occupies the full width of the frame.  Keybindings are shown in
some of the buffers.

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                     | I/O buffer (of debugged program) |
|                                   | (comint-mode)                    |
|                                   |                                  |
|                                   |                                  |
|                                   |                                  |
|                                   |                                  |
|                                   |                                  |
|                                   |                                  |
+-----------------------------------+----------------------------------+
| Stack buffer                      | Breakpoints buffer               |
| RET      gdb-frames-select        | SPC    gdb-toggle-breakpoint     |
|                                   | RET    gdb-goto-breakpoint       |
|                                   | D      gdb-delete-breakpoint     |
+-----------------------------------+----------------------------------+

To run GDB in text command mode, replace the GDB \"--annotate=3\"
option with \"--fullname\" either in the minibuffer for the
current Emacs session, or the custom variable
`gud-gdb-command-name' for all future sessions.  You need to use
text command mode to debug multiple programs within one Emacs
session."
  (interactive (list (gud-query-cmdline 'gdb)))

  (when (and gud-comint-buffer
	   (buffer-name gud-comint-buffer)
	   (get-buffer-process gud-comint-buffer)
	   (with-current-buffer gud-comint-buffer (eq gud-minor-mode 'gdba)))
	(gdb-restore-windows)
	(error
	 "Multiple debugging requires restarting in text command mode"))

  (gud-common-init command-line nil 'gud-gdba-marker-filter)
  (set (make-local-variable 'gud-minor-mode) 'gdba)

  (gud-def gud-break  "break %f:%l"  "\C-b" "Set breakpoint at current line.")
  (gud-def gud-tbreak "tbreak %f:%l" "\C-t"
	   "Set temporary breakpoint at current line.")
  (gud-def gud-remove "clear %f:%l" "\C-d" "Remove breakpoint at current line.")
  (gud-def gud-step   "step %p"     "\C-s" "Step one source line with display.")
  (gud-def gud-stepi  "stepi %p"    "\C-i" "Step one instruction with display.")
  (gud-def gud-next   "next %p"     "\C-n" "Step one line (skip functions).")
  (gud-def gud-nexti  "nexti %p" nil   "Step one instruction (skip functions).")
  (gud-def gud-cont   "cont"     "\C-r" "Continue with display.")
  (gud-def gud-finish "finish"   "\C-f" "Finish executing current function.")
  (gud-def gud-jump
	   (progn (gud-call "tbreak %f:%l") (gud-call "jump %f:%l"))
	   "\C-j" "Set execution address to current line.")

  (gud-def gud-up     "up %p"     "<" "Up N stack frames (numeric arg).")
  (gud-def gud-down   "down %p"   ">" "Down N stack frames (numeric arg).")
  (gud-def gud-print  "print %e"  "\C-p" "Evaluate C expression at point.")
  (gud-def gud-pstar  "print* %e" nil
	   "Evaluate C dereferenced pointer expression at point.")

  ;; For debugging Emacs only.
  (gud-def gud-pv "pv1 %e"      "\C-v" "Print the value of the lisp variable.")

  (gud-def gud-until  "until %l" "\C-u" "Continue to current line.")
  (gud-def gud-run    "run"	 nil    "Run the program.")

  (local-set-key "\C-i" 'gud-gdb-complete-command)
  (setq comint-prompt-regexp "^(.*gdb[+]?) *")
  (setq paragraph-start comint-prompt-regexp)
  (setq gdb-first-prompt t)
  (setq gud-running nil)
  (setq gdb-ready nil)
  (setq gdb-flush-pending-output nil)
  (setq gud-filter-pending-text nil)
  (run-hooks 'gdb-mode-hook))

;; Keep as an alias for compatibility with Emacs 22.1.
;;;###autoload
(defalias 'gdba 'gdb)

(defcustom gdb-debug-log-max 128
  "Maximum size of `gdb-debug-log'.  If nil, size is unlimited."
  :group 'gud
  :type '(choice (integer :tag "Number of elements")
		 (const   :tag "Unlimited" nil))
  :version "22.1")

(defvar gdb-debug-log nil
  "List of commands sent to and replies received from GDB.
Most recent commands are listed first.  This list stores only the last
`gdb-debug-log-max' values.  This variable is used to debug GDB-UI.")

;;;###autoload
(defcustom gdb-enable-debug nil
  "Non-nil means record the process input and output in `gdb-debug-log'."
  :type 'boolean
  :group 'gud
  :version "22.1")

(defcustom gdb-cpp-define-alist-program "gcc -E -dM -"
  "Shell command for generating a list of defined macros in a source file.
This list is used to display the #define directive associated
with an identifier as a tooltip.  It works in a debug session with
GDB, when `gud-tooltip-mode' is t.

Set `gdb-cpp-define-alist-flags' for any include paths or
predefined macros."
  :type 'string
  :group 'gud
  :version "22.1")

(defcustom gdb-cpp-define-alist-flags ""
  "Preprocessor flags for `gdb-cpp-define-alist-program'."
  :type 'string
  :group 'gud
  :version "22.1")

(defcustom gdb-show-main nil
  "Non-nil means display source file containing the main routine at startup.
Also display the main routine in the disassembly buffer if present."
  :type 'boolean
  :group 'gud
  :version "22.1")

(defcustom gdb-many-windows nil
  "If nil, just pop up the GUD buffer unless `gdb-show-main' is t.
In this case start with two windows: one displaying the GUD
buffer and the other with the source file with the main routine
of the debugged program.  Non-nil means display the layout shown
for `gdba'."
  :type 'boolean
  :group 'gud
  :version "22.1")

(defcustom gdb-use-separate-io-buffer nil
  "Non-nil means display output from the debugged program in a separate buffer."
  :type 'boolean
  :group 'gud
  :version "22.1")

(defun gdb-force-mode-line-update (status)
  (let ((buffer gud-comint-buffer))
    (if (and buffer (buffer-name buffer))
	(with-current-buffer buffer
	  (setq mode-line-process
		(format ":%s [%s]"
			(process-status (get-buffer-process buffer)) status))
	  ;; Force mode line redisplay soon.
	  (force-mode-line-update)))))

(defun gdb-many-windows (arg)
  "Toggle the number of windows in the basic arrangement.
With prefix argument ARG, display additional buffers if ARG is positive,
otherwise use a single window."
  (interactive "P")
  (setq gdb-many-windows
	(if (null arg)
	    (not gdb-many-windows)
	  (> (prefix-numeric-value arg) 0)))
  (message (format "Display of other windows %sabled"
		   (if gdb-many-windows "en" "dis")))
  (if (and gud-comint-buffer
	   (buffer-name gud-comint-buffer))
      (condition-case nil
	  (gdb-restore-windows)
	(error nil))))

(defun gdb-use-separate-io-buffer (arg)
  "Toggle separate IO for debugged program.
With prefix argument ARG, use separate IO if ARG is positive,
otherwise do not."
  (interactive "P")
  (setq gdb-use-separate-io-buffer
	(if (null arg)
	    (not gdb-use-separate-io-buffer)
	  (> (prefix-numeric-value arg) 0)))
  (message (format "Separate IO %sabled"
		   (if gdb-use-separate-io-buffer "en" "dis")))
  (if (and gud-comint-buffer
	   (buffer-name gud-comint-buffer))
      (condition-case nil
	  (if gdb-use-separate-io-buffer
	      (if gdb-many-windows (gdb-restore-windows))
	    (kill-buffer (gdb-inferior-io-name)))
	(error nil))))

(defvar gdb-define-alist nil "Alist of #define directives for GUD tooltips.")

(defun gdb-create-define-alist ()
  "Create an alist of #define directives for GUD tooltips."
  (let* ((file (buffer-file-name))
	 (output
	  (with-output-to-string
	    (with-current-buffer standard-output
	      (and file (file-exists-p file)
	      (call-process shell-file-name file
			    (list t nil) nil "-c"
			    (concat gdb-cpp-define-alist-program " "
				    gdb-cpp-define-alist-flags))))))
	(define-list (split-string output "\n" t)) (name))
    (setq gdb-define-alist nil)
    (dolist (define define-list)
      (setq name (nth 1 (split-string define "[( ]")))
      (push (cons name define) gdb-define-alist))))

(defun gdb-tooltip-print (expr)
  (tooltip-show
   (with-current-buffer (gdb-get-buffer 'gdb-partial-output-buffer)
     (goto-char (point-min))
     (let ((string
	    (if (search-forward "=" nil t)
		(concat expr (buffer-substring (- (point) 2) (point-max)))
	      (buffer-string))))
       ;; remove newline for gud-tooltip-echo-area
       (substring string 0 (- (length string) 1))))
   (or gud-tooltip-echo-area tooltip-use-echo-area)))

;; If expr is a macro for a function don't print because of possible dangerous
;; side-effects. Also printing a function within a tooltip generates an
;; unexpected starting annotation (phase error).
(defun gdb-tooltip-print-1 (expr)
  (with-current-buffer (gdb-get-buffer 'gdb-partial-output-buffer)
    (goto-char (point-min))
    (if (search-forward "expands to: " nil t)
	(unless (looking-at "\\S-+.*(.*).*")
	  (gdb-enqueue-input
	   (list  (concat gdb-server-prefix "print " expr "\n")
		  `(lambda () (gdb-tooltip-print ,expr))))))))

(defconst gdb-source-file-regexp "\\(.+?\\), \\|\\([^, \n].*$\\)")

(defun gdb-set-gud-minor-mode-existing-buffers ()
  "Create list of source files for current GDB session."
  (goto-char (point-min))
  (when (search-forward "read in on demand:" nil t)
    (while (re-search-forward gdb-source-file-regexp nil t)
      (push (file-name-nondirectory (or (match-string 1) (match-string 2)))
	    gdb-source-file-list))
    (dolist (buffer (buffer-list))
      (with-current-buffer buffer
	(when (and buffer-file-name
		   (member (file-name-nondirectory buffer-file-name)
			   gdb-source-file-list))
	  (set (make-local-variable 'gud-minor-mode) 'gdba)
	  (set (make-local-variable 'tool-bar-map) gud-tool-bar-map)
	  (when gud-tooltip-mode
	    (make-local-variable 'gdb-define-alist)
	    (gdb-create-define-alist)
	    (add-hook 'after-save-hook 'gdb-create-define-alist nil t))))))
  (gdb-force-mode-line-update
   (propertize "ready" 'face font-lock-variable-name-face)))

(defun gdb-find-watch-expression ()
  (let* ((var (nth (- (line-number-at-pos (point)) 2) gdb-var-list))
	 (varnum (car var)) expr array)
    (string-match "\\(var[0-9]+\\)\\.\\(.*\\)" varnum)
    (let ((var1 (assoc (match-string 1 varnum) gdb-var-list)) var2 varnumlet
	  (component-list (split-string (match-string 2 varnum) "\\." t)))
      (setq expr (nth 1 var1))
      (setq varnumlet (car var1))
      (dolist (component component-list)
	(setq var2 (assoc varnumlet gdb-var-list))
	(setq expr (concat expr
			   (if (string-match ".*\\[[0-9]+\\]$" (nth 3 var2))
			       (concat "[" component "]")
			     (concat "." component))))
	(setq varnumlet (concat varnumlet "." component)))
      expr)))

(defun gdb-init-1 ()
  (gud-def gud-break (if (not (string-match "Machine" mode-name))
			 (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-match "Machine" mode-name))
			  (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-match "Machine" mode-name))
			 (gud-call "until %f:%l" arg)
		       (save-excursion
			 (beginning-of-line)
			 (forward-char 2)
			 (gud-call "until *%a" arg)))
	   "\C-u" "Continue to current line or address.")
  ;;
  (gud-def gud-go (gud-call (if gdb-active-process "continue" "run") arg)
	   nil "Start or continue execution.")

  ;; For debugging Emacs only.
  (gud-def gud-pp
	   (gud-call
	    (concat
	     "pp1 " (if (eq (buffer-local-value
			     'major-mode (window-buffer)) 'speedbar-mode)
			(gdb-find-watch-expression) "%e")) arg)
	   nil   "Print the Emacs s-expression.")

  (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-margin C-mouse-1]
    'gdb-mouse-toggle-breakpoint-margin)
  (define-key gud-minor-mode-map [left-fringe C-mouse-1]
    'gdb-mouse-toggle-breakpoint-fringe)

  (define-key gud-minor-mode-map [left-margin drag-mouse-1]
    '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-until)
  (define-key gud-minor-mode-map [left-fringe mouse-3]
    'gdb-mouse-until)

  (define-key gud-minor-mode-map [left-margin C-drag-mouse-1]
    'gdb-mouse-jump)
  (define-key gud-minor-mode-map [left-fringe C-drag-mouse-1]
    'gdb-mouse-jump)
  (define-key gud-minor-mode-map [left-fringe C-mouse-3]
    'gdb-mouse-jump)
  (define-key gud-minor-mode-map [left-margin C-mouse-3]
    'gdb-mouse-jump)

  (setq comint-input-sender 'gdb-send)

  ;; (re-)initialize
  (setq gdb-pc-address (if gdb-show-main "main" nil))
  (setq gdb-previous-frame-address nil
	gdb-memory-address "main"
	gdb-previous-frame nil
	gdb-selected-frame nil
	gdb-current-language nil
	gdb-frame-number nil
	gdb-var-list nil
	gdb-main-file nil
	gdb-first-post-prompt t
	gdb-prompting nil
	gdb-input-queue nil
	gdb-current-item nil
	gdb-pending-triggers nil
	gdb-output-sink 'user
	gdb-server-prefix "server "
	gdb-location-alist nil
	gdb-source-file-list nil
	gdb-error nil
	gdb-macro-info nil
	gdb-buffer-fringe-width (car (window-fringes))
	gdb-debug-log nil
	gdb-signalled nil
	gdb-source-window nil
	gdb-inferior-status nil
	gdb-continuation nil
	gdb-look-up-stack nil
        gdb-frame-begin nil
	gdb-printing t
	gud-old-arrow nil)

  (setq gdb-buffer-type 'gdba)

  (if gdb-use-separate-io-buffer (gdb-clear-inferior-io))

  ;; Hack to see test for GDB 6.4+ (-stack-info-frame was implemented in 6.4)
  (gdb-enqueue-input (list "server interpreter mi -stack-info-frame\n"
			   'gdb-get-version)))

(defun gdb-init-2 ()
  (if (eq window-system 'w32)
      (gdb-enqueue-input (list "set new-console off\n" 'ignore)))
  (gdb-enqueue-input (list "set height 0\n" 'ignore))
  (gdb-enqueue-input (list "set width 0\n" 'ignore))

  (if (string-equal gdb-version "pre-6.4")
      (progn
	(gdb-enqueue-input (list (concat gdb-server-prefix "info sources\n")
				 'gdb-set-gud-minor-mode-existing-buffers))
	(setq gdb-locals-font-lock-keywords gdb-locals-font-lock-keywords-1))
    (gdb-enqueue-input
     (list "server interpreter mi -data-list-register-names\n"
	 'gdb-get-register-names))
    ; Needs GDB 6.2 onwards.
    (gdb-enqueue-input
     (list "server interpreter mi \"-file-list-exec-source-files\"\n"
	   'gdb-set-gud-minor-mode-existing-buffers-1))
    (setq gdb-locals-font-lock-keywords gdb-locals-font-lock-keywords-2))

  ;; Find source file and compilation directory here.
  ;; Works for C, C++, Fortran and Ada but not Java (GDB 6.4)
  (gdb-enqueue-input (list "server list\n" 'ignore))
  (gdb-enqueue-input (list "server info source\n" 'gdb-source-info))

  (run-hooks 'gdb-mode-hook))

(defun gdb-get-version ()
  (goto-char (point-min))
  (if (re-search-forward "Undefined\\( mi\\)* command:" nil t)
      (setq gdb-version "pre-6.4")
    (setq gdb-version "6.4+"))
  (gdb-init-2))

(defmacro gdb-if-arrow (arrow-position &rest body)
  `(if ,arrow-position
      (let ((buffer (marker-buffer ,arrow-position)) (line))
	(if (equal buffer (window-buffer (posn-window end)))
	    (with-current-buffer buffer
	      (when (or (equal start end)
			(equal (posn-point start)
			       (marker-position ,arrow-position)))
		,@body))))))

(defun gdb-mouse-until (event)
  "Continue running until a source line past the current line.
The destination source line can be selected either by clicking
with mouse-3 on the fringe/margin or dragging the arrow
with mouse-1 (default bindings)."
  (interactive "e")
  (let ((start (event-start event))
	(end (event-end event)))
    (gdb-if-arrow gud-overlay-arrow-position
		  (setq line (line-number-at-pos (posn-point end)))
		  (gud-call (concat "until " (number-to-string line))))
    (gdb-if-arrow gdb-overlay-arrow-position
		  (save-excursion
		    (goto-line (line-number-at-pos (posn-point end)))
		    (forward-char 2)
		    (gud-call (concat "until *%a"))))))

(defun gdb-mouse-jump (event)
  "Set execution address/line.
The destination source line can be selected either by clicking with C-mouse-3
on the fringe/margin or dragging the arrow with C-mouse-1 (default bindings).
Unlike `gdb-mouse-until' the destination address can be before the current
line, and no execution takes place."
  (interactive "e")
  (let ((start (event-start event))
	(end (event-end event)))
    (gdb-if-arrow gud-overlay-arrow-position
		  (setq line (line-number-at-pos (posn-point end)))
		  (progn
		    (gud-call (concat "tbreak " (number-to-string line)))
		    (gud-call (concat "jump " (number-to-string line)))))
    (gdb-if-arrow gdb-overlay-arrow-position
		  (save-excursion
		    (goto-line (line-number-at-pos (posn-point end)))
		    (forward-char 2)
		    (progn
		      (gud-call (concat "tbreak *%a"))
		      (gud-call (concat "jump *%a")))))))

(defcustom gdb-speedbar-auto-raise nil
  "If non-nil raise speedbar every time display of watch expressions is\
 updated."
  :type 'boolean
  :group 'gud
  :version "22.1")

(defun gdb-speedbar-auto-raise (arg)
  "Toggle automatic raising of the speedbar for watch expressions.
With prefix argument ARG, automatically raise speedbar if ARG is
positive, otherwise don't automatically raise it."
  (interactive "P")
  (setq gdb-speedbar-auto-raise
	(if (null arg)
	    (not gdb-speedbar-auto-raise)
	  (> (prefix-numeric-value arg) 0)))
  (message (format "Auto raising %sabled"
		   (if gdb-speedbar-auto-raise "en" "dis"))))

(defcustom gdb-use-colon-colon-notation nil
  "If non-nil use FUN::VAR format to display variables in the speedbar."
  :type 'boolean
  :group 'gud
  :version "22.1")

(define-key gud-minor-mode-map "\C-c\C-w" 'gud-watch)
(define-key global-map (concat gud-key-prefix "\C-w") 'gud-watch)

(defun gud-watch (&optional arg event)
  "Watch expression at point.
With arg, enter name of variable to be watched in the minibuffer."
  (interactive (list current-prefix-arg last-input-event))
  (let ((minor-mode (buffer-local-value 'gud-minor-mode gud-comint-buffer)))
    (if (memq minor-mode '(gdbmi gdba))
	(progn
	  (if event (posn-set-point (event-end event)))
	  (require 'tooltip)
	  (save-selected-window
	    (let ((expr
		   (if arg
		       (completing-read "Name of variable: "
					'gud-gdb-complete-command)
		     (if (and transient-mark-mode mark-active)
			 (buffer-substring (region-beginning) (region-end))
		       (tooltip-identifier-from-point (point))))))
	      (speedbar 1)
		(set-text-properties 0 (length expr) nil expr)
		(gdb-enqueue-input
		 (list
		  (if (eq minor-mode 'gdba)
		      (concat
		       "server interpreter mi \"-var-create - * "  expr "\"\n")
		    (concat"-var-create - * "  expr "\n"))
		  `(lambda () (gdb-var-create-handler ,expr)))))))
      (message "gud-watch is a no-op in this mode."))))

(defconst gdb-var-create-regexp
  "name=\"\\(.*?\\)\",.*numchild=\"\\(.*?\\)\",\\(?:.*value=\\(\".*\"\\),\\)?.*type=\"\\(.*?\\)\"")

(defun gdb-var-create-handler (expr)
  (goto-char (point-min))
  (if (re-search-forward gdb-var-create-regexp nil t)
      (let ((var (list
		  (match-string 1)
		  (if (and (string-equal gdb-current-language "c")
			   gdb-use-colon-colon-notation gdb-selected-frame)
		      (setq expr (concat gdb-selected-frame "::" expr))
		    expr)
		  (match-string 2)
		  (match-string 4)
		  (if (match-string 3) (read (match-string 3)))
		  nil gdb-frame-address)))
	(push var gdb-var-list)
	(unless (string-equal
		 speedbar-initial-expansion-list-name "GUD")
	  (speedbar-change-initial-expansion-list "GUD"))
	(unless (nth 4 var)
	  (gdb-enqueue-input
	   (list
	    (if (eq (buffer-local-value 'gud-minor-mode gud-comint-buffer)
		    'gdba)
		(concat "server interpreter mi \"0-var-evaluate-expression "
			(car var) "\"\n")
	      (concat "0-var-evaluate-expression " (car var) "\n"))
	      `(lambda () (gdb-var-evaluate-expression-handler
			   ,(car var) nil))))))
    (if (search-forward "Undefined command" nil t)
	(message-box "Watching expressions requires GDB 6.0 onwards")
      (message-box "No symbol \"%s\" in current context." expr))))

(defun gdb-speedbar-update ()
  (when (and (boundp 'speedbar-frame) (frame-live-p speedbar-frame)
	     (not (member 'gdb-speedbar-timer gdb-pending-triggers)))
    ;; Dummy command to update speedbar even when idle.
    (gdb-enqueue-input (list "server pwd\n" 'gdb-speedbar-timer-fn))
    ;; Keep gdb-pending-triggers non-nil till end.
    (push 'gdb-speedbar-timer gdb-pending-triggers)))

(defun gdb-speedbar-timer-fn ()
  (setq gdb-pending-triggers
	(delq 'gdb-speedbar-timer gdb-pending-triggers))
  (speedbar-timer-fn))

(defun gdb-var-evaluate-expression-handler (varnum changed)
  (goto-char (point-min))
  (re-search-forward "\\(.+\\)\\^done,value=\\(\".*\"\\)" nil t)
  (setq gdb-pending-triggers
	(delq (string-to-number (match-string 1)) gdb-pending-triggers))
  (let ((var (assoc varnum gdb-var-list)))
    (when var
      (if changed (setcar (nthcdr 5 var) 'changed))
      (setcar (nthcdr 4 var) (read (match-string 2)))))
  (gdb-speedbar-update))

(defun gdb-var-list-children (varnum)
  (gdb-enqueue-input
   (list (concat "server interpreter mi \"-var-list-children " varnum "\"\n")
	 `(lambda () (gdb-var-list-children-handler ,varnum)))))

(defconst gdb-var-list-children-regexp
  "child={.*?name=\"\\(.*?\\)\",.*?exp=\"\\(.*?\\)\",.*?\
numchild=\"\\(.*?\\)\"\\(}\\|,.*?\\(type=\"\\(.*?\\)\"\\)?.*?}\\)")

(defun gdb-var-list-children-handler (varnum)
  (goto-char (point-min))
  (let ((var-list nil))
    (catch 'child-already-watched
      (dolist (var gdb-var-list)
	(if (string-equal varnum (car var))
	    (progn
	      (push var var-list)
	      (while (re-search-forward gdb-var-list-children-regexp nil t)
		(let ((varchild (list (match-string 1)
				      (match-string 2)
				      (match-string 3)
				      (match-string 6)
				      nil nil)))
		  (if (assoc (car varchild) gdb-var-list)
		      (throw 'child-already-watched nil))
		  (push varchild var-list)
		  (gdb-enqueue-input
		   (list
		    (concat
		     "server interpreter mi \"0-var-evaluate-expression "
		     (car varchild) "\"\n")
		    `(lambda () (gdb-var-evaluate-expression-handler
				 ,(car varchild) nil)))))))
	  (push var var-list)))
      (setq gdb-var-list (nreverse var-list)))))

(defun gdb-var-update ()
  (when (not (member 'gdb-var-update gdb-pending-triggers))
    (gdb-enqueue-input
     (list "server interpreter mi \"-var-update *\"\n"
	   'gdb-var-update-handler))
    (push 'gdb-var-update gdb-pending-triggers)))

(defconst gdb-var-update-regexp
  "{.*?name=\"\\(.*?\\)\",.*?in_scope=\"\\(.*?\\)\",.*?\
type_changed=\".*?\".*?}")

(defun gdb-var-update-handler ()
  (dolist (var gdb-var-list)
    (setcar (nthcdr 5 var) nil))
  (goto-char (point-min))
  (let ((n 0))
    (while (re-search-forward gdb-var-update-regexp nil t)
      (let ((varnum (match-string 1)))
	(if  (string-equal (match-string 2) "false")
	    (let ((var (assoc varnum gdb-var-list)))
	      (if var (setcar (nthcdr 5 var) 'out-of-scope)))
	  (setq n (1+ n))
	  (push n gdb-pending-triggers)
	  (gdb-enqueue-input
	   (list
	    (concat "server interpreter mi \"" (number-to-string n)
		    "-var-evaluate-expression " varnum "\"\n")
	  `(lambda () (gdb-var-evaluate-expression-handler ,varnum t))))))))
  (setq gdb-pending-triggers
	(delq 'gdb-var-update gdb-pending-triggers)))

(defun gdb-var-set-format (format)
  "Set the output format for a variable displayed in the speedbar."
  (let* ((var (nth (- (count-lines (point-min) (point)) 2) gdb-var-list))
	 (varnum (car var)))
    (gdb-enqueue-input
     (list
      (if (eq (buffer-local-value 'gud-minor-mode gud-comint-buffer) 'gdba)
	  (concat "server interpreter mi \"-var-set-format "
		  varnum " " format "\"\n")
	(concat "-var-set-format " varnum " " format "\n"))
	   `(lambda () (gdb-var-set-format-handler ,varnum))))))

(defconst gdb-var-set-format-regexp
  "format=\"\\(.*?\\)\",.*value=\"\\(.*?\\)\"")

(defun gdb-var-set-format-handler (varnum)
  (goto-char (point-min))
  (if (re-search-forward gdb-var-set-format-regexp nil t)
      (let ((var (assoc varnum gdb-var-list)))
	(setcar (nthcdr 4 var) (match-string 2))
	(gdb-var-update-1))))

(defun gdb-var-delete-1 (varnum)
  (gdb-enqueue-input
   (list
    (if (eq (buffer-local-value 'gud-minor-mode gud-comint-buffer) 'gdba)
	(concat "server interpreter mi \"-var-delete " varnum "\"\n")
      (concat "-var-delete " varnum "\n"))
    'ignore))
  (setq gdb-var-list (delq var gdb-var-list))
  (dolist (varchild gdb-var-list)
    (if (string-match (concat (car var) "\\.") (car varchild))
	(setq gdb-var-list (delq varchild gdb-var-list)))))

(defun gdb-var-delete ()
  "Delete watch expression at point from the speedbar."
  (interactive)
  (if (memq (buffer-local-value 'gud-minor-mode gud-comint-buffer)
	    '(gdbmi gdba))
      (let* ((var (nth (- (count-lines (point-min) (point)) 2) gdb-var-list))
	     (varnum (car var)))
	(if (string-match "\\." (car var))
	    (message-box "Can only delete a root expression")
	  (gdb-var-delete-1 varnum)))))

(defun gdb-var-delete-children (varnum)
  "Delete children of variable object at point from the speedbar."
  (gdb-enqueue-input
   (list
    (if (eq (buffer-local-value 'gud-minor-mode gud-comint-buffer) 'gdba)
	(concat "server interpreter mi \"-var-delete -c " varnum "\"\n")
      (concat "-var-delete -c " varnum "\n")) 'ignore)))

(defun gdb-edit-value (text token indent)
  "Assign a value to a variable displayed in the speedbar."
  (let* ((var (nth (- (count-lines (point-min) (point)) 2) gdb-var-list))
	 (varnum (car var)) (value))
    (setq value (read-string "New value: "))
    (gdb-enqueue-input
     (list
      (if (eq (buffer-local-value 'gud-minor-mode gud-comint-buffer) 'gdba)
	  (concat "server interpreter mi \"-var-assign "
		  varnum " " value "\"\n")
	(concat "-var-assign " varnum " " value "\n"))
	   `(lambda () (gdb-edit-value-handler ,value))))))

(defun gdb-edit-value-handler (value)
  (goto-char (point-min))
  (if (re-search-forward gdb-error-regexp nil t)
      (message-box "Invalid number or expression (%s)" value)))

(defcustom gdb-show-changed-values t
  "If non-nil change the face of out of scope variables and changed values.
Out of scope variables are suppressed with `shadow' face.
Changed values are highlighted with the face `font-lock-warning-face'."
  :type 'boolean
  :group 'gud
  :version "22.1")

(defcustom gdb-max-children 40
  "Maximum number of children before expansion requires confirmation."
  :type 'integer
  :group 'gud
  :version "22.1")

(defcustom gdb-delete-out-of-scope t
  "If non-nil delete watch expressions automatically when they go out of scope."
  :type 'boolean
  :group 'gud
  :version "22.2")

(defun gdb-speedbar-expand-node (text token indent)
  "Expand the node the user clicked on.
TEXT is the text of the button we clicked on, a + or - item.
TOKEN is data related to this node.
INDENT is the current indentation depth."
  (if (and gud-comint-buffer (buffer-name gud-comint-buffer))
      (progn
	(cond ((string-match "+" text)	;expand this node
	       (let* ((var (assoc token gdb-var-list))
		      (expr (nth 1 var)) (children (nth 2 var)))
		 (if (or (<= (string-to-number children) gdb-max-children)
			  (y-or-n-p
			   (format
			    "%s has %s children. Continue? " expr children)))
		     (if (and (eq (buffer-local-value
				   'gud-minor-mode gud-comint-buffer) 'gdba)
			      (string-equal gdb-version "pre-6.4"))
			 (gdb-var-list-children token)
		       (gdb-var-list-children-1 token)))))
	      ((string-match "-" text)	;contract this node
	       (dolist (var gdb-var-list)
		 (if (string-match (concat token "\\.") (car var))
		     (setq gdb-var-list (delq var gdb-var-list))))
	       (gdb-var-delete-children token)
	       (speedbar-change-expand-button-char ?+)
	       (speedbar-delete-subblock indent))
	      (t (error "Ooops...  not sure what to do")))
	(speedbar-center-buffer-smartly))
    (message-box "GUD session has been killed")))

(defun gdb-get-target-string ()
  (with-current-buffer gud-comint-buffer
    gud-target-name))


;;
;; gdb buffers.
;;
;; Each buffer has a TYPE -- a symbol that identifies the function
;; of that particular buffer.
;;
;; The usual gdb interaction buffer is given the type `gdba' and
;; is constructed specially.
;;
;; Others are constructed by gdb-get-buffer-create and
;; named according to the rules set forth in the gdb-buffer-rules-assoc

(defvar gdb-buffer-rules-assoc '())

(defun gdb-get-buffer (key)
  "Return the gdb buffer tagged with type KEY.
The key should be one of the cars in `gdb-buffer-rules-assoc'."
  (save-excursion
    (gdb-look-for-tagged-buffer key (buffer-list))))

(defun gdb-get-buffer-create (key)
  "Create a new gdb buffer of the type specified by KEY.
The key should be one of the cars in `gdb-buffer-rules-assoc'."
  (or (gdb-get-buffer key)
      (let* ((rules (assoc key gdb-buffer-rules-assoc))
	     (name (funcall (gdb-rules-name-maker rules)))
	     (new (get-buffer-create name)))
	(with-current-buffer new
	  (let ((trigger))
	    (if (cdr (cdr rules))
		(setq trigger (funcall (car (cdr (cdr rules))))))
	    (setq gdb-buffer-type key)
	    (set (make-local-variable 'gud-minor-mode)
		 (buffer-local-value 'gud-minor-mode gud-comint-buffer))
	    (set (make-local-variable 'tool-bar-map) gud-tool-bar-map)
	    (if trigger (funcall trigger)))
	  new))))

(defun gdb-rules-name-maker (rules) (car (cdr rules)))

(defun gdb-look-for-tagged-buffer (key bufs)
  (let ((retval nil))
    (while (and (not retval) bufs)
      (set-buffer (car bufs))
      (if (eq gdb-buffer-type key)
	  (setq retval (car bufs)))
      (setq bufs (cdr bufs)))
    retval))

;;
;; This assoc maps buffer type symbols to rules.  Each rule is a list of
;; at least one and possible more functions.  The functions have these
;; roles in defining a buffer type:
;;
;;     NAME - Return a name for this  buffer type.
;;
;; The remaining function(s) are optional:
;;
;;     MODE - called in a new buffer with no arguments, should establish
;;	      the proper mode for the buffer.
;;

(defun gdb-set-buffer-rules (buffer-type &rest rules)
  (let ((binding (assoc buffer-type gdb-buffer-rules-assoc)))
    (if binding
	(setcdr binding rules)
      (push (cons buffer-type rules)
	    gdb-buffer-rules-assoc))))

;; GUD buffers are an exception to the rules
(gdb-set-buffer-rules 'gdba 'error)

;; Partial-output buffer : This accumulates output from a command executed on
;; behalf of emacs (rather than the user).
;;
(gdb-set-buffer-rules 'gdb-partial-output-buffer
		      'gdb-partial-output-name)

(defun gdb-partial-output-name ()
  (concat " *partial-output-"
	  (gdb-get-target-string)
	  "*"))


(gdb-set-buffer-rules 'gdb-inferior-io
		      'gdb-inferior-io-name
		      'gdb-inferior-io-mode)

(defun gdb-inferior-io-name ()
  (concat "*input/output of "
	  (gdb-get-target-string)
	  "*"))

(defun gdb-display-separate-io-buffer ()
  "Display IO of debugged program in a separate window."
  (interactive)
  (if gdb-use-separate-io-buffer
      (gdb-display-buffer
       (gdb-get-buffer-create 'gdb-inferior-io) t)))

(defconst gdb-frame-parameters
  '((height . 14) (width . 80)
    (unsplittable . t)
    (tool-bar-lines . nil)
    (menu-bar-lines . nil)
    (minibuffer . nil)))

(defun gdb-frame-separate-io-buffer ()
  "Display IO of debugged program in a new frame."
  (interactive)
  (if gdb-use-separate-io-buffer
      (let ((special-display-regexps (append special-display-regexps '(".*")))
	    (special-display-frame-alist gdb-frame-parameters))
	(display-buffer (gdb-get-buffer-create 'gdb-inferior-io)))))

(defvar gdb-inferior-io-mode-map
  (let ((map (make-sparse-keymap)))
    (define-key map "\C-c\C-c" 'gdb-separate-io-interrupt)
    (define-key map "\C-c\C-z" 'gdb-separate-io-stop)
    (define-key map "\C-c\C-\\" 'gdb-separate-io-quit)
    (define-key map "\C-c\C-d" 'gdb-separate-io-eof)
    (define-key map "\C-d" 'gdb-separate-io-eof)
    map))

(define-derived-mode gdb-inferior-io-mode comint-mode "Inferior I/O"
  "Major mode for gdb inferior-io."
  :syntax-table nil :abbrev-table nil
  ;; We want to use comint because it has various nifty and familiar
  ;; features.  We don't need a process, but comint wants one, so create
  ;; a dummy one.
  (make-comint-in-buffer
   (substring (buffer-name) 1 (- (length (buffer-name)) 1))
   (current-buffer) "hexl")
  (setq comint-input-sender 'gdb-inferior-io-sender))

(defun gdb-inferior-io-sender (proc string)
  ;; PROC is the pseudo-process created to satisfy comint.
  (with-current-buffer (process-buffer proc)
    (setq proc (get-buffer-process gud-comint-buffer))
    (process-send-string proc string)
    (process-send-string proc "\n")))

(defun gdb-separate-io-interrupt ()
  "Interrupt the program being debugged."
  (interactive)
  (interrupt-process
   (get-buffer-process gud-comint-buffer) comint-ptyp))

(defun gdb-separate-io-quit ()
  "Send quit signal to the program being debugged."
  (interactive)
  (quit-process
   (get-buffer-process gud-comint-buffer) comint-ptyp))

(defun gdb-separate-io-stop ()
  "Stop the program being debugged."
  (interactive)
  (stop-process
   (get-buffer-process gud-comint-buffer) comint-ptyp))

(defun gdb-separate-io-eof ()
  "Send end-of-file to the program being debugged."
  (interactive)
  (process-send-eof
   (get-buffer-process gud-comint-buffer)))


;; gdb communications
;;

;; INPUT: things sent to gdb
;;
;; The queues are lists.  Each element is either a string (indicating user or
;; user-like input) or a list of the form:
;;
;;    (INPUT-STRING  HANDLER-FN)
;;
;; The handler function will be called from the partial-output buffer when the
;; command completes.  This is the way to write commands which invoke gdb
;; commands autonomously.
;;
;; These lists are consumed tail first.
;;

(defun gdb-send (proc string)
  "A comint send filter for gdb.
This filter may simply queue input for a later time."
  (when gdb-ready
      (with-current-buffer gud-comint-buffer
	(let ((inhibit-read-only t))
	  (remove-text-properties (point-min) (point-max) '(face))))
      (if gud-running
	  (progn
	    (let ((item (concat string "\n")))
	      (if gdb-enable-debug (push (cons 'send item) gdb-debug-log))
	      (process-send-string proc item)))
	(if (string-match "\\\\\\'" string)
	    (setq gdb-continuation (concat gdb-continuation string "\n"))
	  (let ((item (concat gdb-continuation string
			      (if (not comint-input-sender-no-newline) "\n"))))
	    (gdb-enqueue-input item)
	    (setq gdb-continuation nil))))))

;; Note: Stuff enqueued here will be sent to the next prompt, even if it
;; is a query, or other non-top-level prompt.

(defun gdb-enqueue-input (item)
  (if (not gud-running)
      (if gdb-prompting
	  (progn
	    (gdb-send-item item)
	    (setq gdb-prompting nil))
	(push item gdb-input-queue))))

(defun gdb-dequeue-input ()
  (let ((queue gdb-input-queue))
    (if queue
	(let ((last (car (last queue))))
	  (unless (nbutlast queue) (setq gdb-input-queue '()))
	  last)
      ;; This should be nil here anyway but set it just to make sure.
      (setq gdb-pending-triggers nil))))

(defun gdb-send-item (item)
  (setq gdb-flush-pending-output nil)
  (if gdb-enable-debug (push (cons 'send-item item) gdb-debug-log))
  (setq gdb-current-item item)
  (let ((process (get-buffer-process gud-comint-buffer)))
    (if (eq (buffer-local-value 'gud-minor-mode gud-comint-buffer) 'gdba)
	(if (stringp item)
	    (progn
	      (setq gdb-output-sink 'user)
	      (process-send-string process item))
	  (progn
	    (gdb-clear-partial-output)
	    (setq gdb-output-sink 'pre-emacs)
	    (process-send-string process
				 (car item))))
      ;; case: eq gud-minor-mode 'gdbmi
      (gdb-clear-partial-output)
      (setq gdb-output-sink 'emacs)
      (process-send-string process (car item)))))

;;
;; output -- things gdb prints to emacs
;;
;; GDB output is a stream interrupted by annotations.
;; Annotations can be recognized by their beginning
;; with \C-j\C-z\C-z<tag><opt>\C-j
;;
;; The tag is a string obeying symbol syntax.
;;
;; The optional part `<opt>' can be either the empty string
;; or a space followed by more data relating to the annotation.
;; For example, the SOURCE annotation is followed by a filename,
;; line number and various useless goo.  This data must not include
;; any newlines.
;;

(defcustom gud-gdb-command-name "gdb --annotate=3"
  "Default command to execute an executable under the GDB debugger.
The option \"--annotate=3\" must be included in this value if you
want the GDB Graphical Interface."
  :type 'string
  :group 'gud
  :version "22.1")

(defvar gdb-annotation-rules
  '(("pre-prompt" gdb-pre-prompt)
    ("prompt" gdb-prompt)
    ("commands" gdb-subprompt)
    ("overload-choice" gdb-subprompt)
    ("query" gdb-subprompt)
    ;; Need this prompt for GDB 6.1
    ("nquery" gdb-subprompt)
    ("prompt-for-continue" gdb-subprompt)
    ("post-prompt" gdb-post-prompt)
    ("source" gdb-source)
    ("starting" gdb-starting)
    ("exited" gdb-exited)
    ("signalled" gdb-signalled)
    ("signal" gdb-signal)
    ("breakpoint" gdb-stopping)
    ("watchpoint" gdb-stopping)
    ("frame-begin" gdb-frame-begin)
    ("stopped" gdb-stopped)
    ("error-begin" gdb-error)
    ("error" gdb-error)
    ) "An assoc mapping annotation tags to functions which process them.")

(defun gdb-resync()
  (setq gdb-flush-pending-output t)
  (setq gud-running nil)
  (gdb-force-mode-line-update
   (propertize "stopped"'face font-lock-warning-face))
  (setq gdb-output-sink 'user)
  (setq gdb-input-queue nil)
  (setq gdb-pending-triggers nil)
  (setq gdb-prompting t))

(defconst gdb-source-spec-regexp
  "\\(.*\\):\\([0-9]*\\):[0-9]*:[a-z]*:0x0*\\([a-f0-9]*\\)")

;; Do not use this except as an annotation handler.
(defun gdb-source (args)
  (string-match gdb-source-spec-regexp args)
  ;; Extract the frame position from the marker.
  (setq gud-last-frame
	(cons
	 (match-string 1 args)
	 (string-to-number (match-string 2 args))))
  (setq gdb-pc-address (match-string 3 args))
  ;; cover for auto-display output which comes *before*
  ;; stopped annotation
  (if (eq gdb-output-sink 'inferior) (setq gdb-output-sink 'user)))

(defun gdb-pre-prompt (ignored)
  "An annotation handler for `pre-prompt'.
This terminates the collection of output from a previous command if that
happens to be in effect."
  (setq gdb-error nil)
  (let ((sink gdb-output-sink))
    (cond
     ((eq sink 'user) t)
     ((eq sink 'emacs)
      (setq gdb-output-sink 'post-emacs))
     (t
      (gdb-resync)
      (error "Phase error in gdb-pre-prompt (got %s)" sink)))))

(defun gdb-prompt (ignored)
  "An annotation handler for `prompt'.
This sends the next command (if any) to gdb."
  (when gdb-first-prompt
    (gdb-force-mode-line-update
     (propertize "initializing..." 'face font-lock-variable-name-face))
    (gdb-init-1)
    (setq gdb-first-prompt nil))
  (let ((sink gdb-output-sink))
    (cond
     ((eq sink 'user) t)
     ((eq sink 'post-emacs)
      (setq gdb-output-sink 'user)
      (let ((handler
	     (car (cdr gdb-current-item))))
	(with-current-buffer (gdb-get-buffer-create 'gdb-partial-output-buffer)
	  (funcall handler))))
     (t
      (gdb-resync)
      (error "Phase error in gdb-prompt (got %s)" sink))))
  (let ((input (gdb-dequeue-input)))
    (if input
	(gdb-send-item input)
      (progn
	(setq gdb-prompting t)
	(gud-display-frame)))))

(defun gdb-subprompt (ignored)
  "An annotation handler for non-top-level prompts."
  (setq gdb-prompting t))

(defun gdb-starting (ignored)
  "An annotation handler for `starting'.
This says that I/O for the subprocess is now the program being debugged,
not GDB."
  (setq gdb-active-process t)
  (setq gdb-printing t)
  (let ((sink gdb-output-sink))
    (cond
     ((eq sink 'user)
      (progn
	(setq gud-running t)
	(setq gdb-inferior-status "running")
	(setq gdb-signalled nil)
	(gdb-force-mode-line-update
	 (propertize gdb-inferior-status 'face font-lock-type-face))
	(gdb-remove-text-properties)
	(setq gud-old-arrow gud-overlay-arrow-position)
	(setq gud-overlay-arrow-position nil)
	(setq gdb-overlay-arrow-position nil)
	(setq gdb-stack-position nil)
	(if gdb-use-separate-io-buffer
	    (setq gdb-output-sink 'inferior))))
     (t
      (gdb-resync)
      (error "Unexpected `starting' annotation")))))

(defun gdb-signal (ignored)
  (setq gdb-inferior-status "signal")
  (gdb-force-mode-line-update
   (propertize gdb-inferior-status 'face font-lock-warning-face))
  (gdb-stopping ignored))

(defun gdb-stopping (ignored)
  "An annotation handler for `breakpoint' and other annotations.
They say that I/O for the subprocess is now GDB, not the program
being debugged."
  (if gdb-use-separate-io-buffer
      (let ((sink gdb-output-sink))
	(cond
	 ((eq sink 'inferior)
	  (setq gdb-output-sink 'user))
	 (t
	  (gdb-resync)
	  (error "Unexpected stopping annotation"))))))

(defun gdb-exited (ignored)
  "An annotation handler for `exited' and `signalled'.
They say that I/O for the subprocess is now GDB, not the program
being debugged and that the program is no longer running.  This
function is used to change the focus of GUD tooltips to #define
directives."
  (setq gdb-active-process nil)
  (setq gud-overlay-arrow-position nil)
  (setq gdb-overlay-arrow-position nil)
  (setq gdb-stack-position nil)
  (setq gud-old-arrow nil)
  (setq gdb-inferior-status "exited")
  (gdb-force-mode-line-update
   (propertize gdb-inferior-status 'face font-lock-warning-face))
  (gdb-stopping ignored))

(defun gdb-signalled (ignored)
  (setq gdb-signalled t))

(defun gdb-frame-begin (ignored)
  (setq gdb-frame-begin t)
  (setq gdb-printing nil)
  (let ((sink gdb-output-sink))
    (cond
     ((eq sink 'inferior)
      (setq gdb-output-sink 'user))
     ((eq sink 'user) t)
     ((eq sink 'emacs) t)
     (t
      (gdb-resync)
      (error "Unexpected frame-begin annotation (%S)" sink)))))

(defcustom gdb-same-frame focus-follows-mouse
  "Non-nil means pop up GUD buffer in same frame."
  :group 'gud
  :type 'boolean
  :version "22.1")

(defcustom gdb-find-source-frame nil
  "Non-nil means try to find a source frame further up stack e.g after signal."
  :group 'gud
  :type 'boolean
  :version "22.1")

(defun gdb-find-source-frame (arg)
  "Toggle trying to find a source frame further up stack.
With prefix argument ARG, look for a source frame further up
stack if ARG is positive, otherwise don't look further up."
  (interactive "P")
  (setq gdb-find-source-frame
	(if (null arg)
	    (not gdb-find-source-frame)
	  (> (prefix-numeric-value arg) 0)))
  (message (format "Looking for source frame %sabled"
		   (if gdb-find-source-frame "en" "dis"))))

(defun gdb-stopped (ignored)
  "An annotation handler for `stopped'.
It is just like `gdb-stopping', except that if we already set the output
sink to `user' in `gdb-stopping', that is fine."
  (setq gud-running nil)
  (unless (or gud-overlay-arrow-position gud-last-frame)
    (if (and gdb-frame-begin gdb-printing)
	(setq gud-overlay-arrow-position gud-old-arrow)
    ;;Pop up GUD buffer to display current frame when it doesn't have source
    ;;information i.e if not compiled with -g as with libc routines generally.
    (if gdb-same-frame
	(gdb-display-gdb-buffer)
      (gdb-frame-gdb-buffer))
    (if gdb-find-source-frame
    ;;Try to find source further up stack e.g after signal.
	(setq gdb-look-up-stack
	      (if (gdb-get-buffer 'gdb-stack-buffer)
		  'keep
		(progn
		  (gdb-get-buffer-create 'gdb-stack-buffer)
		  (gdb-invalidate-frames)
		  'delete))))))
  (unless (member gdb-inferior-status '("exited" "signal"))
    (setq gdb-active-process t) ;Just for attaching case.
    (setq gdb-inferior-status "stopped")
    (gdb-force-mode-line-update
     (propertize gdb-inferior-status 'face font-lock-warning-face)))
  (let ((sink gdb-output-sink))
    (cond
     ((eq sink 'inferior)
      (setq gdb-output-sink 'user))
     ((eq sink 'user) t)
     (t
      (gdb-resync)
      (error "Unexpected stopped annotation"))))
  (if gdb-signalled (gdb-exited ignored)))

(defun gdb-error (ignored)
  (setq gdb-error (not gdb-error)))

(defun gdb-post-prompt (ignored)
  "An annotation handler for `post-prompt'.
This begins the collection of output from the current command if that
happens to be appropriate."
  ;; Don't add to queue if there outstanding items or gdb-version is not known
  ;; yet.
  (unless (or gdb-pending-triggers gdb-first-post-prompt)
    (gdb-get-selected-frame)
    (gdb-invalidate-frames)
    ;; Regenerate breakpoints buffer in case it has been inadvertantly deleted.
    (gdb-get-buffer-create 'gdb-breakpoints-buffer)
    (gdb-invalidate-breakpoints)
    ;; Do this through gdb-get-selected-frame -> gdb-frame-handler
    ;; so gdb-pc-address is updated.
    ;; (gdb-invalidate-assembler)

    (if (string-equal gdb-version "pre-6.4")
	(gdb-invalidate-registers)
      (gdb-get-changed-registers)
      (gdb-invalidate-registers-1))

    (gdb-invalidate-memory)
    (if (string-equal gdb-version "pre-6.4")
	(gdb-invalidate-locals)
      (gdb-invalidate-locals-1))

    (gdb-invalidate-threads)
    (unless (eq system-type 'darwin) ;Breaks on Darwin's GDB-5.3.
      ;; FIXME: with GDB-6 on Darwin, this might very well work.
      ;; Only needed/used with speedbar/watch expressions.
      (when (and (boundp 'speedbar-frame) (frame-live-p speedbar-frame))
	(if (string-equal gdb-version "pre-6.4")
	    (gdb-var-update)
	  (gdb-var-update-1)))))
  (setq gdb-first-post-prompt nil)
  (let ((sink gdb-output-sink))
    (cond
     ((eq sink 'user) t)
     ((eq sink 'pre-emacs)
      (setq gdb-output-sink 'emacs))
     (t
      (gdb-resync)
      (error "Phase error in gdb-post-prompt (got %s)" sink)))))

(defconst gdb-buffer-list
'(gdb-stack-buffer gdb-locals-buffer gdb-registers-buffer gdb-threads-buffer))

(defun gdb-remove-text-properties ()
  (dolist (buffertype gdb-buffer-list)
    (let ((buffer (gdb-get-buffer buffertype)))
      (if buffer
	  (with-current-buffer buffer
	    (let ((inhibit-read-only t))
	      (remove-text-properties
	       (point-min) (point-max) '(mouse-face nil help-echo nil))))))))

;; GUD displays the selected GDB frame.  This might might not be the current
;; GDB frame (after up, down etc).  If no GDB frame is visible but the last
;; visited breakpoint is, use that window.
(defun gdb-display-source-buffer (buffer)
  (let* ((last-window (if gud-last-last-frame
			 (get-buffer-window
			  (gud-find-file (car gud-last-last-frame)))))
	 (source-window (or last-window
			    (if (and gdb-source-window
				     (window-live-p gdb-source-window))
				gdb-source-window))))
    (when source-window
      (setq gdb-source-window source-window)
      (set-window-buffer source-window buffer))
    source-window))

;; Derived from gud-gdb-marker-regexp
(defvar gdb-fullname-regexp
  (concat "\\(.:?[^" ":" "\n]*\\)" ":" "\\([0-9]*\\)" ":" ".*"))

(defun gud-gdba-marker-filter (string)
  "A gud marker filter for gdb.  Handle a burst of output from GDB."
  (if gdb-flush-pending-output
      nil
    (when gdb-enable-debug
	(push (cons 'recv string) gdb-debug-log)
	(if (and gdb-debug-log-max
		 (> (length gdb-debug-log) gdb-debug-log-max))
	    (setcdr (nthcdr (1- gdb-debug-log-max) gdb-debug-log) nil)))
    ;; 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 ""))
      ;;
      ;; Process all the complete markers in this chunk.
      (while (string-match "\n\032\032\\(.*\\)\n" gud-marker-acc)
	(let ((annotation (match-string 1 gud-marker-acc))
	      (before (substring gud-marker-acc 0 (match-beginning 0)))
	      (after (substring gud-marker-acc (match-end 0))))
	  ;;
	  ;; Parse the tag from the annotation, and maybe its arguments.
	  (string-match "\\(\\S-*\\) ?\\(.*\\)" annotation)
	  (let* ((annotation-type (match-string 1 annotation))
		 (annotation-arguments (match-string 2 annotation))
		 (annotation-rule (assoc annotation-type
					 gdb-annotation-rules))
		 (fullname (string-match gdb-fullname-regexp annotation-type)))

	    ;; Stuff prior to the match is just ordinary output.
	    ;; It is either concatenated to OUTPUT or directed
	    ;; elsewhere.
	    (setq output
		  (gdb-concat-output output
				     (concat before (if fullname "\n"))))

	    ;; Take that stuff off the gud-marker-acc.
	    (setq gud-marker-acc after)

	    ;; Call the handler for this annotation.
	    (if annotation-rule
		(funcall (car (cdr annotation-rule))
			 annotation-arguments)

	      ;; Switch to gud-gdb-marker-filter if appropriate.
	      (when fullname

		;; Extract the frame position from the marker.
		(setq gud-last-frame (cons (match-string 1 annotation)
					   (string-to-number
					    (match-string 2 annotation))))

		(set (make-local-variable 'gud-minor-mode) 'gdb)
		(set (make-local-variable 'gud-marker-filter)
		     'gud-gdb-marker-filter)))

	    ;; Else the annotation is not recognized.  Ignore it silently,
	    ;; so that GDB can add new annotations without causing
	    ;; us to blow up.
	    )))

      ;; Does the remaining text end in a partial line?
      ;; If it does, then keep part of the gud-marker-acc until we get more.
      (if (string-match "\n\\'\\|\n\032\\'\\|\n\032\032.*\\'"
			gud-marker-acc)
	  (progn
	    ;; Everything before the potential marker start can be output.
	    (setq output
		  (gdb-concat-output output
				     (substring gud-marker-acc 0
						(match-beginning 0))))
	    ;;
	    ;; Everything after, we save, to combine with later input.
	    (setq gud-marker-acc (substring gud-marker-acc
					    (match-beginning 0))))
	;;
	;; In case we know the gud-marker-acc contains no partial annotations:
	(progn
	  (setq output (gdb-concat-output output gud-marker-acc))
	  (setq gud-marker-acc "")))
      output)))

(defun gdb-concat-output (so-far new)
  (if gdb-error
      (put-text-property 0 (length new) 'face font-lock-warning-face new))
  (let ((sink gdb-output-sink))
    (cond
     ((eq sink 'user) (concat so-far new))
     ((or (eq sink 'pre-emacs) (eq sink 'post-emacs)) so-far)
     ((eq sink 'emacs)
      (gdb-append-to-partial-output new)
      so-far)
     ((eq sink 'inferior)
      (gdb-append-to-inferior-io new)
      so-far)
     (t
      (gdb-resync)
      (error "Bogon output sink %S" sink)))))

(defun gdb-append-to-partial-output (string)
  (with-current-buffer (gdb-get-buffer-create 'gdb-partial-output-buffer)
    (goto-char (point-max))
    (insert string)))

(defun gdb-clear-partial-output ()
  (with-current-buffer (gdb-get-buffer-create 'gdb-partial-output-buffer)
    (erase-buffer)))

(defun gdb-append-to-inferior-io (string)
  (with-current-buffer (gdb-get-buffer-create 'gdb-inferior-io)
    (goto-char (point-max))
    (insert-before-markers string))
  (if (not (string-equal string ""))
      (gdb-display-buffer (gdb-get-buffer-create 'gdb-inferior-io) t)))

(defun gdb-clear-inferior-io ()
  (with-current-buffer (gdb-get-buffer-create 'gdb-inferior-io)
    (erase-buffer)))


;; One trick is to have a command who's output is always available in a buffer
;; of it's own, and is always up to date.  We build several buffers of this
;; type.
;;
;; There are two aspects to this: gdb has to tell us when the output for that
;; command might have changed, and we have to be able to run the command
;; behind the user's back.
;;
;; The output phasing associated with the variable gdb-output-sink
;; help us to run commands behind the user's back.
;;
;; Below is the code for specificly managing buffers of output from one
;; command.
;;

;; The trigger function is suitable for use in the assoc GDB-ANNOTATION-RULES
;; It adds an input for the command we are tracking.  It should be the
;; annotation rule binding of whatever gdb sends to tell us this command
;; might have changed it's output.
;;
;; NAME is the function name. DEMAND-PREDICATE tests if output is really needed.
;; GDB-COMMAND is a string of such.  OUTPUT-HANDLER is the function bound to the
;; input in the input queue (see comment about ``gdb communications'' above).

(defmacro def-gdb-auto-update-trigger (name demand-predicate gdb-command
					    output-handler)
  `(defun ,name (&optional ignored)
     (if (and ,demand-predicate
	      (not (member ',name
			   gdb-pending-triggers)))
	 (progn
	   (gdb-enqueue-input
	    (list ,gdb-command ',output-handler))
	   (push ',name gdb-pending-triggers)))))

(defmacro def-gdb-auto-update-handler (name trigger buf-key custom-defun)
  `(defun ,name ()
     (setq gdb-pending-triggers
      (delq ',trigger
	    gdb-pending-triggers))
     (let ((buf (gdb-get-buffer ',buf-key)))
       (and buf
	    (with-current-buffer buf
	      (let* ((window (get-buffer-window buf 0))
		     (start (window-start window))
		     (p (window-point window))
		    (buffer-read-only nil))
		(erase-buffer)
		(insert-buffer-substring (gdb-get-buffer-create
					  'gdb-partial-output-buffer))
		(set-window-start window start)
		(set-window-point window p)))))
     ;; put customisation here
     (,custom-defun)))

(defmacro def-gdb-auto-updated-buffer (buffer-key
				       trigger-name gdb-command
				       output-handler-name custom-defun)
  `(progn
     (def-gdb-auto-update-trigger ,trigger-name
       ;; The demand predicate:
       (gdb-get-buffer ',buffer-key)
       ,gdb-command
       ,output-handler-name)
     (def-gdb-auto-update-handler ,output-handler-name
       ,trigger-name ,buffer-key ,custom-defun)))


;;
;; Breakpoint buffer : This displays the output of `info breakpoints'.
;;
(gdb-set-buffer-rules 'gdb-breakpoints-buffer
		      'gdb-breakpoints-buffer-name
		      'gdb-breakpoints-mode)

(def-gdb-auto-updated-buffer gdb-breakpoints-buffer
  ;; This defines the auto update rule for buffers of type
  ;; `gdb-breakpoints-buffer'.
  ;;
  ;; It defines a function to serve as the annotation handler that
  ;; handles the `foo-invalidated' message.  That function is called:
  gdb-invalidate-breakpoints
  ;;
  ;; To update the buffer, this command is sent to gdb.
  "server info breakpoints\n"
  ;;
  ;; This also defines a function to be the handler for the output
  ;; from the command above.  That function will copy the output into
  ;; the appropriately typed buffer.  That function will be called:
  gdb-info-breakpoints-handler
  ;; buffer specific functions
  gdb-info-breakpoints-custom)

(defconst breakpoint-xpm-data
  "/* XPM */
static char *magick[] = {
/* columns rows colors chars-per-pixel */
\"10 10 2 1\",
\"  c red\",
\"+ c None\",
/* pixels */
\"+++    +++\",
\"++      ++\",
\"+        +\",
\"          \",
\"          \",
\"          \",
\"          \",
\"+        +\",
\"++      ++\",
\"+++    +++\",
};"
  "XPM data used for breakpoint icon.")

(defconst breakpoint-enabled-pbm-data
  "P1
10 10\",
0 0 0 0 1 1 1 1 0 0 0 0
0 0 0 1 1 1 1 1 1 0 0 0
0 0 1 1 1 1 1 1 1 1 0 0
0 1 1 1 1 1 1 1 1 1 1 0
0 1 1 1 1 1 1 1 1 1 1 0
0 1 1 1 1 1 1 1 1 1 1 0
0 1 1 1 1 1 1 1 1 1 1 0
0 0 1 1 1 1 1 1 1 1 0 0
0 0 0 1 1 1 1 1 1 0 0 0
0 0 0 0 1 1 1 1 0 0 0 0"
  "PBM data used for enabled breakpoint icon.")

(defconst breakpoint-disabled-pbm-data
  "P1
10 10\",
0 0 1 0 1 0 1 0 0 0
0 1 0 1 0 1 0 1 0 0
1 0 1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1 0 1
1 0 1 0 1 0 1 0 1 0
0 1 0 1 0 1 0 1 0 1
0 0 1 0 1 0 1 0 1 0
0 0 0 1 0 1 0 1 0 0"
  "PBM data used for disabled breakpoint icon.")

(defvar breakpoint-enabled-icon nil
  "Icon for enabled breakpoint in display margin.")

(defvar breakpoint-disabled-icon nil
  "Icon for disabled breakpoint in display margin.")

(and (display-images-p)
     ;; Bitmap for breakpoint in fringe
     (define-fringe-bitmap 'breakpoint
       "\x3c\x7e\xff\xff\xff\xff\x7e\x3c")
     ;; Bitmap for gud-overlay-arrow in fringe
     (define-fringe-bitmap 'hollow-right-triangle
       "\xe0\x90\x88\x84\x84\x88\x90\xe0"))

(defface breakpoint-enabled
  '((t
     :foreground "red1"
     :weight bold))
  "Face for enabled breakpoint icon in fringe."
  :group 'gud)

(defface breakpoint-disabled
  '((((class color) (min-colors 88)) :foreground "grey70")
    ;; Ensure that on low-color displays that we end up something visible.
    (((class color) (min-colors 8) (background light))
     :foreground "black")
    (((class color) (min-colors 8) (background dark))
     :foreground "white")
    (((type tty) (class mono))
     :inverse-video t)
    (t :background "gray"))
  "Face for disabled breakpoint icon in fringe."
  :group 'gud)

(defconst gdb-breakpoint-regexp
  "\\(?:\\([0-9]+\\).*?\\(?:point\\|catch\\s-+\\S-+\\)\\s-+\\S-+\\|\\([0-9]+\\.[0-9]+\\)\\)\\s-+\\(.\\)\\s-+")

;; Put breakpoint icons in relevant margins (even those set in the GUD buffer).
(defun gdb-info-breakpoints-custom ()
  (let ((flag) (bptno))
    ;; Remove all breakpoint-icons in source buffers but not assembler buffer.
    (dolist (buffer (buffer-list))
      (with-current-buffer buffer
	(if (and (memq gud-minor-mode '(gdba gdbmi))
		 (not (string-match "\\` ?\\*.+\\*\\'" (buffer-name))))
	    (gdb-remove-breakpoint-icons (point-min) (point-max)))))
    (with-current-buffer (gdb-get-buffer 'gdb-breakpoints-buffer)
      (save-excursion
	(let ((buffer-read-only nil))
	(goto-char (point-min))
	(while (< (point) (- (point-max) 1))
	  (forward-line 1)
	  (if (looking-at gdb-breakpoint-regexp)
	      (progn
		(setq bptno (or (match-string 1) (match-string 2)))
		(setq flag (char-after (match-beginning 3)))
		(if (match-string 1)
		    (setq gdb-parent-bptno-enabled (eq flag ?y)))
		(add-text-properties
		 (match-beginning 3) (match-end 3)
		 (if (eq flag ?y)
		     '(face font-lock-warning-face)
		   '(face font-lock-type-face)))
		(let ((bl (point))
		      (el (line-end-position)))
		  (if (re-search-forward " in \\(.*\\) at\\s-+" el t)
		      (progn
			(add-text-properties
			 (match-beginning 1) (match-end 1)
			 '(face font-lock-function-name-face))
			(looking-at "\\(\\S-+\\):\\([0-9]+\\)")
			(let ((line (match-string 2))
			      (file (match-string 1)))
			  (add-text-properties bl el
			   '(mouse-face highlight
			     help-echo "mouse-2, RET: visit breakpoint"))
			  (unless (file-exists-p file)
			    (setq file (cdr (assoc bptno gdb-location-alist))))
			  (if (and file
				   (not (string-equal file "File not found")))
			      (with-current-buffer
				  (find-file-noselect file 'nowarn)
				(set (make-local-variable 'gud-minor-mode)
				     'gdba)
				(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)))
			    (gdb-enqueue-input
			     (list
			      (concat gdb-server-prefix "list "
				      (match-string-no-properties 1) ":1\n")
			      'ignore))
			    (gdb-enqueue-input
			     (list (concat gdb-server-prefix "info source\n")
				   `(lambda () (gdb-get-location
						,bptno ,line ,flag)))))))
		    (if (re-search-forward
			 "<\\(\\(\\sw\\|[_.]\\)+\\)\\(\\+[0-9]+\\)?>"
			 el t)
			(add-text-properties
			 (match-beginning 1) (match-end 1)
			 '(face font-lock-function-name-face))
		      (end-of-line)
		      (re-search-backward "\\s-\\(\\S-*\\)"
					  bl t)
		      (add-text-properties
		       (match-beginning 1) (match-end 1)
		       '(face font-lock-variable-name-face)))))))
	  (end-of-line))))))
  (if (gdb-get-buffer 'gdb-assembler-buffer) (gdb-assembler-custom)))

(defun gdb-mouse-set-clear-breakpoint (event)
  "Set/clear breakpoint in left fringe/margin with mouse click."
  (interactive "e")
  (mouse-minibuffer-check event)
  (let ((posn (event-end event)))
    (if (buffer-file-name)
	(if (numberp (posn-point posn))
	    (with-selected-window (posn-window posn)
	      (save-excursion
		(goto-char (posn-point posn))
		(if (or (posn-object posn)
			(eq (car (fringe-bitmaps-at-pos (posn-point posn)))
			    'breakpoint))
		    (gud-remove nil)
		  (gud-break nil)))))
      (posn-set-point posn))))

(defun gdb-mouse-toggle-breakpoint-margin (event)
  "Enable/disable breakpoint in left margin with mouse click."
  (interactive "e")
  (mouse-minibuffer-check event)
  (let ((posn (event-end event)))
    (if (numberp (posn-point posn))
	(with-selected-window (posn-window posn)
	  (save-excursion
	    (goto-char (posn-point posn))
	    (if	(posn-object posn)
		(let* ((bptno (get-text-property
			       0 'gdb-bptno (car (posn-string posn)))))
		  (string-match "\\([0-9+]\\)*" bptno)
		  (gdb-enqueue-input
		   (list
		    (concat gdb-server-prefix
			    (if (get-text-property
				 0 'gdb-enabled (car (posn-string posn)))
				"disable "
			      "enable ")
			    (match-string 1 bptno) "\n")
		   'ignore)))))))))

(defun gdb-mouse-toggle-breakpoint-fringe (event)
  "Enable/disable breakpoint in left fringe with mouse click."
  (interactive "e")
  (mouse-minibuffer-check event)
  (let* ((posn (event-end event))
	 (pos (posn-point posn))
	 obj)
    (when (numberp pos)
      (with-selected-window (posn-window posn)
	(save-excursion
	  (set-buffer (window-buffer (selected-window)))
	  (goto-char pos)
	  (dolist (overlay (overlays-in pos pos))
	    (when (overlay-get overlay 'put-break)
	      (setq obj (overlay-get overlay 'before-string))))
	  (when (stringp obj)
	    (let* ((bptno (get-text-property 0 'gdb-bptno obj)))
	      (string-match "\\([0-9+]\\)*" bptno)
	      (gdb-enqueue-input
	       (list
		(concat gdb-server-prefix
			(if (get-text-property 0 'gdb-enabled obj)
			    "disable "
			  "enable ")
			(match-string 1 bptno) "\n")
		'ignore)))))))))

(defun gdb-breakpoints-buffer-name ()
  (with-current-buffer gud-comint-buffer
    (concat "*breakpoints of " (gdb-get-target-string) "*")))

(defun gdb-display-breakpoints-buffer ()
  "Display status of user-settable breakpoints."
  (interactive)
  (gdb-display-buffer
   (gdb-get-buffer-create 'gdb-breakpoints-buffer) t))

(defun gdb-frame-breakpoints-buffer ()
  "Display status of user-settable breakpoints in a new frame."
  (interactive)
  (let ((special-display-regexps (append special-display-regexps '(".*")))
	(special-display-frame-alist gdb-frame-parameters))
    (display-buffer (gdb-get-buffer-create 'gdb-breakpoints-buffer))))

(defvar gdb-breakpoints-mode-map
  (let ((map (make-sparse-keymap))
	(menu (make-sparse-keymap "Breakpoints")))
    (define-key menu [quit] '("Quit"   . gdb-delete-frame-or-window))
    (define-key menu [goto] '("Goto"   . gdb-goto-breakpoint))
    (define-key menu [delete] '("Delete" . gdb-delete-breakpoint))
    (define-key menu [toggle] '("Toggle" . gdb-toggle-breakpoint))
    (suppress-keymap map)
    (define-key map [menu-bar breakpoints] (cons "Breakpoints" menu))
    (define-key map " " 'gdb-toggle-breakpoint)
    (define-key map "D" 'gdb-delete-breakpoint)
    ;; Don't bind "q" to kill-this-buffer as we need it for breakpoint icons.
    (define-key map "q" 'gdb-delete-frame-or-window)
    (define-key map "\r" 'gdb-goto-breakpoint)
    (define-key map [mouse-2] 'gdb-goto-breakpoint)
    (define-key map [follow-link] 'mouse-face)
    map))

(defun gdb-delete-frame-or-window ()
  "Delete frame if there is only one window.  Otherwise delete the window."
  (interactive)
  (if (one-window-p) (delete-frame)
    (delete-window)))

(defun gdb-breakpoints-mode ()
  "Major mode for gdb breakpoints.

\\{gdb-breakpoints-mode-map}"
  (kill-all-local-variables)
  (setq major-mode 'gdb-breakpoints-mode)
  (setq mode-name "Breakpoints")
  (use-local-map gdb-breakpoints-mode-map)
  (setq buffer-read-only t)
  (run-mode-hooks 'gdb-breakpoints-mode-hook)
  (if (eq (buffer-local-value 'gud-minor-mode gud-comint-buffer) 'gdba)
      'gdb-invalidate-breakpoints
    'gdbmi-invalidate-breakpoints))

(defun gdb-toggle-breakpoint ()
  "Enable/disable breakpoint at current line."
  (interactive)
  (save-excursion
    (beginning-of-line 1)
    (if (looking-at gdb-breakpoint-regexp)
	(gdb-enqueue-input
	 (list
	  (concat gdb-server-prefix
		  (if (eq ?y (char-after (match-beginning 3)))
		      "disable "
		    "enable ")
		  (or (match-string 1) (match-string 2)) "\n") 'ignore))
      (error "Not recognized as break/watchpoint line"))))

(defun gdb-delete-breakpoint ()
  "Delete the breakpoint at current line."
  (interactive)
  (save-excursion
    (beginning-of-line 1)
    (if (looking-at gdb-breakpoint-regexp)
	(if (match-string 1)
	    (gdb-enqueue-input
	     (list
	      (concat gdb-server-prefix "delete " (match-string 1) "\n")
	      'ignore))
	  (message-box "This breakpoint cannot be deleted on its own."))
      (error "Not recognized as break/watchpoint line"))))

(defun gdb-goto-breakpoint (&optional event)
  "Display the breakpoint location specified at current line."
  (interactive (list last-input-event))
  (if event (posn-set-point (event-end event)))
  (save-excursion
    (beginning-of-line 1)
    (if (looking-at "\\([0-9]+\\.?[0-9]*\\) .+ in .+ at\\s-+\\(\\S-+\\):\\([0-9]+\\)")
	(let ((bptno (match-string 1))
	      (file  (match-string 2))
	      (line  (match-string 3)))
	  (save-selected-window
	    (let* ((buffer (find-file-noselect
			 (if (file-exists-p file) file
			   (cdr (assoc bptno gdb-location-alist)))))
		   (window (or (gdb-display-source-buffer buffer)
			       (display-buffer buffer))))
	      (setq gdb-source-window window)
	      (with-current-buffer buffer
		(goto-line (string-to-number line))
		(set-window-point window (point))))))
      (error "No location specified."))))


;; Frames buffer.  This displays a perpetually correct bactracktrace
;; (from the command `where').
;;
;; Alas, if your stack is deep, it is costly.
;;
(defcustom gdb-max-frames 40
  "Maximum number of frames displayed in call stack."
  :type 'integer
  :group 'gud
  :version "22.1")

(gdb-set-buffer-rules 'gdb-stack-buffer
		      'gdb-stack-buffer-name
		      'gdb-frames-mode)

(def-gdb-auto-updated-buffer gdb-stack-buffer
  gdb-invalidate-frames
  (concat "server info stack " (number-to-string gdb-max-frames) "\n")
  gdb-info-stack-handler
  gdb-info-stack-custom)

(defun gdb-info-stack-custom ()
  (with-current-buffer (gdb-get-buffer 'gdb-stack-buffer)
    (let (move-to)
      (save-excursion
	(unless (eq gdb-look-up-stack 'delete)
	  (let ((buffer-read-only nil)
		bl el)
	    (goto-char (point-min))
	    (while (< (point) (point-max))
	      (setq bl (line-beginning-position)
		    el (line-end-position))
	      (when (looking-at "#")
		(add-text-properties bl el
				     '(mouse-face highlight
						  help-echo "mouse-2, RET: Select frame")))
	      (goto-char bl)
	      (when (looking-at "^#\\([0-9]+\\)")
		(when (string-equal (match-string 1) gdb-frame-number)
		  (if (> (car (window-fringes)) 0)
		      (progn
			(or gdb-stack-position
			    (setq gdb-stack-position (make-marker)))
			(set-marker gdb-stack-position (point))
			(setq move-to gdb-stack-position))
		    (put-text-property bl (+ bl 4)
				       'face '(:inverse-video t))
		    (setq move-to bl)))
		(when (re-search-forward
		       (concat
			(if (string-equal (match-string 1) "0") "" " in ")
			"\\([^ ]+\\) (") el t)
		  (put-text-property (match-beginning 1) (match-end 1)
				     'face font-lock-function-name-face)
		  (setq bl (match-end 0))
		  (while (re-search-forward "<\\([^>]+\\)>" el t)
		    (put-text-property (match-beginning 1) (match-end 1)
				       'face font-lock-function-name-face))
		  (goto-char bl)
		  (while (re-search-forward "\\(\\(\\sw\\|[_.]\\)+\\)=" el t)
		    (put-text-property (match-beginning 1) (match-end 1)
				       'face font-lock-variable-name-face))))
	      (forward-line 1))
	    (forward-line -1)
	    (when (looking-at "(More stack frames follow...)")
	      (add-text-properties (match-beginning 0) (match-end 0)
				   '(mouse-face highlight
						gdb-max-frames t
						help-echo
						"mouse-2, RET: customize gdb-max-frames to see more frames")))))
	(when gdb-look-up-stack
	  (goto-char (point-min))
	  (when (re-search-forward "\\(\\S-+?\\):\\([0-9]+\\)" nil t)
	    (let ((start (line-beginning-position))
		  (file (match-string 1))
		  (line (match-string 2)))
	      (re-search-backward "^#*\\([0-9]+\\)" start t)
	      (gdb-enqueue-input
	       (list (concat gdb-server-prefix "frame "
			     (match-string 1) "\n") 'gdb-set-hollow))
	      (gdb-enqueue-input
	       (list (concat gdb-server-prefix "frame 0\n") 'ignore))))))
      (when move-to
	(let ((window (get-buffer-window (current-buffer) 0)))
	  (when window
	    (with-selected-window window
	      (goto-char move-to)
	      (unless (pos-visible-in-window-p)
		(recenter '(center)))))))))
  (if (eq gdb-look-up-stack 'delete)
      (kill-buffer (gdb-get-buffer 'gdb-stack-buffer)))
  (setq gdb-look-up-stack nil))

(defun gdb-set-hollow ()
  (if gud-last-last-frame
      (with-current-buffer (gud-find-file (car gud-last-last-frame))
	(setq fringe-indicator-alist
	      '((overlay-arrow . hollow-right-triangle))))))

(defun gdb-stack-buffer-name ()
  (with-current-buffer gud-comint-buffer
    (concat "*stack frames of " (gdb-get-target-string) "*")))

(defun gdb-display-stack-buffer ()
  "Display backtrace of current stack."
  (interactive)
  (gdb-display-buffer
   (gdb-get-buffer-create 'gdb-stack-buffer) t))

(defun gdb-frame-stack-buffer ()
  "Display backtrace of current stack in a new frame."
  (interactive)
  (let ((special-display-regexps (append special-display-regexps '(".*")))
	(special-display-frame-alist gdb-frame-parameters))
    (display-buffer (gdb-get-buffer-create 'gdb-stack-buffer))))

(defvar gdb-frames-mode-map
  (let ((map (make-sparse-keymap)))
    (suppress-keymap map)
    (define-key map "q" 'kill-this-buffer)
    (define-key map "\r" 'gdb-frames-select)
    (define-key map [mouse-2] 'gdb-frames-select)
    (define-key map [follow-link] 'mouse-face)
    map))

(defun gdb-frames-mode ()
  "Major mode for gdb call stack.

\\{gdb-frames-mode-map}"
  (kill-all-local-variables)
  (setq major-mode 'gdb-frames-mode)
  (setq mode-name "Frames")
  (setq gdb-stack-position nil)
  (add-to-list 'overlay-arrow-variable-list 'gdb-stack-position)
  (setq truncate-lines t)  ;; Make it easier to see overlay arrow.
  (setq buffer-read-only t)
  (use-local-map gdb-frames-mode-map)
  (run-mode-hooks 'gdb-frames-mode-hook)
  (if (eq (buffer-local-value 'gud-minor-mode gud-comint-buffer) 'gdba)
      'gdb-invalidate-frames
    'gdbmi-invalidate-frames))

(defun gdb-get-frame-number ()
  (save-excursion
    (end-of-line)
    (let* ((start (line-beginning-position))
	   (pos (re-search-backward "^#*\\([0-9]+\\)" start t))
	   (n (or (and pos (match-string 1)) "0")))
      n)))

(defun gdb-frames-select (&optional event)
  "Select the frame and display the relevant source."
  (interactive (list last-input-event))
  (if event (posn-set-point (event-end event)))
  (if (get-text-property (point) 'gdb-max-frames)
      (progn
	(message-box "After setting gdb-max-frames, you need to enter\n\
another GDB command e.g pwd, to see new frames")
      (customize-variable-other-window 'gdb-max-frames))
    (gdb-enqueue-input
     (list (concat gdb-server-prefix "frame "
		   (gdb-get-frame-number) "\n") 'ignore))))


;; Threads buffer.  This displays a selectable thread list.
;;
(gdb-set-buffer-rules 'gdb-threads-buffer
		      'gdb-threads-buffer-name
		      'gdb-threads-mode)

(def-gdb-auto-updated-buffer gdb-threads-buffer
  gdb-invalidate-threads
  (concat gdb-server-prefix "info threads\n")
  gdb-info-threads-handler
  gdb-info-threads-custom)

(defun gdb-info-threads-custom ()
  (with-current-buffer (gdb-get-buffer 'gdb-threads-buffer)
    (let ((buffer-read-only nil))
      (save-excursion
	(goto-char (point-min))
	(while (< (point) (point-max))
	  (unless (looking-at "No ")
	    (add-text-properties (line-beginning-position) (line-end-position)
				 '(mouse-face highlight
			         help-echo "mouse-2, RET: select thread")))
	  (forward-line 1))))))

(defun gdb-threads-buffer-name ()
  (with-current-buffer gud-comint-buffer
    (concat "*threads of " (gdb-get-target-string) "*")))

(defun gdb-display-threads-buffer ()
  "Display IDs of currently known threads."
  (interactive)
  (gdb-display-buffer
   (gdb-get-buffer-create 'gdb-threads-buffer) t))

(defun gdb-frame-threads-buffer ()
  "Display IDs of currently known threads in a new frame."
  (interactive)
  (let ((special-display-regexps (append special-display-regexps '(".*")))
	(special-display-frame-alist gdb-frame-parameters))
    (display-buffer (gdb-get-buffer-create 'gdb-threads-buffer))))

(defvar gdb-threads-mode-map
  (let ((map (make-sparse-keymap)))
    (suppress-keymap map)
    (define-key map "q" 'kill-this-buffer)
    (define-key map "\r" 'gdb-threads-select)
    (define-key map [mouse-2] 'gdb-threads-select)
    (define-key map [follow-link] 'mouse-face)
    map))

(defvar gdb-threads-font-lock-keywords
  '((") +\\([^ ]+\\) ("  (1 font-lock-function-name-face))
    ("in \\([^ ]+\\) ("  (1 font-lock-function-name-face))
    ("\\(\\(\\sw\\|[_.]\\)+\\)="  (1 font-lock-variable-name-face)))
  "Font lock keywords used in `gdb-threads-mode'.")

(defun gdb-threads-mode ()
  "Major mode for gdb threads.

\\{gdb-threads-mode-map}"
  (kill-all-local-variables)
  (setq major-mode 'gdb-threads-mode)
  (setq mode-name "Threads")
  (setq buffer-read-only t)
  (use-local-map gdb-threads-mode-map)
  (set (make-local-variable 'font-lock-defaults)
       '(gdb-threads-font-lock-keywords))
  (run-mode-hooks 'gdb-threads-mode-hook)
  'gdb-invalidate-threads)

(defun gdb-get-thread-number ()
  (save-excursion
    (re-search-backward "^\\s-*\\([0-9]*\\)" nil t)
    (match-string-no-properties 1)))

(defun gdb-threads-select (&optional event)
  "Select the thread and display the relevant source."
  (interactive (list last-input-event))
  (if event (posn-set-point (event-end event)))
  (gdb-enqueue-input
   (list (concat gdb-server-prefix "thread "
		 (gdb-get-thread-number) "\n") 'ignore))
  (gud-display-frame))


;; Registers buffer.
;;
(defcustom gdb-all-registers nil
  "Non-nil means include floating-point registers."
  :type 'boolean
  :group 'gud
  :version "22.1")

(gdb-set-buffer-rules 'gdb-registers-buffer
		      'gdb-registers-buffer-name
		      'gdb-registers-mode)

(def-gdb-auto-updated-buffer gdb-registers-buffer
  gdb-invalidate-registers
  (concat
   gdb-server-prefix "info " (if gdb-all-registers "all-") "registers\n")
  gdb-info-registers-handler
  gdb-info-registers-custom)

(defun gdb-info-registers-custom ()
  (with-current-buffer (gdb-get-buffer 'gdb-registers-buffer)
    (save-excursion
      (let ((buffer-read-only nil)
	    start end)
	(goto-char (point-min))
	(while (< (point) (point-max))
	  (setq start (line-beginning-position))
	  (setq end (line-end-position))
	  (when (looking-at "^[^ ]+")
	    (unless (string-equal (match-string 0) "The")
	      (put-text-property start (match-end 0)
				 'face font-lock-variable-name-face)
	      (add-text-properties start end
		                   '(help-echo "mouse-2: edit value"
				     mouse-face highlight))))
	  (forward-line 1))))))

(defun gdb-edit-register-value (&optional event)
  (interactive (list last-input-event))
  (save-excursion
    (if event (posn-set-point (event-end event)))
    (beginning-of-line)
    (let* ((register (current-word))
	  (value (read-string (format "New value (%s): " register))))
      (gdb-enqueue-input
       (list (concat gdb-server-prefix "set $" register "=" value "\n")
	     'ignore)))))

(defvar gdb-registers-mode-map
  (let ((map (make-sparse-keymap)))
    (suppress-keymap map)
    (define-key map "\r" 'gdb-edit-register-value)
    (define-key map [mouse-2] 'gdb-edit-register-value)
    (define-key map " " 'gdb-all-registers)
    (define-key map "q" 'kill-this-buffer)
     map))

(defun gdb-registers-mode ()
  "Major mode for gdb registers.

\\{gdb-registers-mode-map}"
  (kill-all-local-variables)
  (setq major-mode 'gdb-registers-mode)
  (setq mode-name "Registers")
  (setq buffer-read-only t)
  (use-local-map gdb-registers-mode-map)
  (run-mode-hooks 'gdb-registers-mode-hook)
  (if (string-equal gdb-version "pre-6.4")
      (progn
	(if gdb-all-registers (setq mode-name "Registers:All"))
	'gdb-invalidate-registers)
    'gdb-invalidate-registers-1))

(defun gdb-registers-buffer-name ()
  (with-current-buffer gud-comint-buffer
    (concat "*registers of " (gdb-get-target-string) "*")))

(defun gdb-display-registers-buffer ()
  "Display integer register contents."
  (interactive)
  (gdb-display-buffer
   (gdb-get-buffer-create 'gdb-registers-buffer) t))

(defun gdb-frame-registers-buffer ()
  "Display integer register contents in a new frame."
  (interactive)
  (let ((special-display-regexps (append special-display-regexps '(".*")))
	(special-display-frame-alist gdb-frame-parameters))
    (display-buffer (gdb-get-buffer-create 'gdb-registers-buffer))))

(defun gdb-all-registers ()
  "Toggle the display of floating-point registers (pre GDB 6.4 only)."
  (interactive)
  (when (string-equal gdb-version "pre-6.4")
    (if gdb-all-registers
	(progn
	  (setq gdb-all-registers nil)
	  (with-current-buffer (gdb-get-buffer-create 'gdb-registers-buffer)
	    (setq mode-name "Registers")))
      (setq gdb-all-registers t)
      (with-current-buffer (gdb-get-buffer-create 'gdb-registers-buffer)
	(setq mode-name "Registers:All")))
    (message (format "Display of floating-point registers %sabled"
		     (if gdb-all-registers "en" "dis")))
    (gdb-invalidate-registers)))


;; Memory buffer.
;;
(defcustom gdb-memory-repeat-count 32
  "Number of data items in memory window."
  :type 'integer
  :group 'gud
  :version "22.1")

(defcustom gdb-memory-format "x"
  "Display format of data items in memory window."
  :type '(choice (const :tag "Hexadecimal" "x")
	 	 (const :tag "Signed decimal" "d")
	 	 (const :tag "Unsigned decimal" "u")
		 (const :tag "Octal" "o")
		 (const :tag "Binary" "t"))
  :group 'gud
  :version "22.1")

(defcustom gdb-memory-unit "w"
  "Unit size of data items in memory window."
  :type '(choice (const :tag "Byte" "b")
		 (const :tag "Halfword" "h")
		 (const :tag "Word" "w")
		 (const :tag "Giant word" "g"))
  :group 'gud
  :version "22.1")

(gdb-set-buffer-rules 'gdb-memory-buffer
		      'gdb-memory-buffer-name
		      'gdb-memory-mode)

(def-gdb-auto-updated-buffer gdb-memory-buffer
  gdb-invalidate-memory
  (concat gdb-server-prefix "x/" (number-to-string gdb-memory-repeat-count)
	  gdb-memory-format gdb-memory-unit " " gdb-memory-address "\n")
  gdb-read-memory-handler
  gdb-read-memory-custom)

(defun gdb-read-memory-custom ()
  (save-excursion
    (goto-char (point-min))
    (if (looking-at "0x[[:xdigit:]]+")
	(setq gdb-memory-address (match-string 0)))))

(defvar gdb-memory-mode-map
  (let ((map (make-sparse-keymap)))
    (suppress-keymap map)
    (define-key map "q" 'kill-this-buffer)
     map))

(defun gdb-memory-set-address (event)
  "Set the start memory address."
  (interactive "e")
  (save-selected-window
    (select-window (posn-window (event-start event)))
    (let ((arg (read-from-minibuffer "Memory address: ")))
      (setq gdb-memory-address arg))
    (gdb-invalidate-memory)))

(defun gdb-memory-set-repeat-count (event)
  "Set the number of data items in memory window."
  (interactive "e")
  (save-selected-window
    (select-window (posn-window (event-start event)))
    (let* ((arg (read-from-minibuffer "Repeat count: "))
	  (count (string-to-number arg)))
      (if (<= count 0)
	  (error "Positive numbers only")
	(customize-set-variable 'gdb-memory-repeat-count count)
	(gdb-invalidate-memory)))))

(defun gdb-memory-format-binary ()
  "Set the display format to binary."
  (interactive)
  (customize-set-variable 'gdb-memory-format "t")
  (gdb-invalidate-memory))

(defun gdb-memory-format-octal ()
  "Set the display format to octal."
  (interactive)
  (customize-set-variable 'gdb-memory-format "o")
  (gdb-invalidate-memory))

(defun gdb-memory-format-unsigned ()
  "Set the display format to unsigned decimal."
  (interactive)
  (customize-set-variable 'gdb-memory-format "u")
  (gdb-invalidate-memory))

(defun gdb-memory-format-signed ()
  "Set the display format to decimal."
  (interactive)
  (customize-set-variable 'gdb-memory-format "d")
  (gdb-invalidate-memory))

(defun gdb-memory-format-hexadecimal ()
  "Set the display format to hexadecimal."
  (interactive)
  (customize-set-variable 'gdb-memory-format "x")
  (gdb-invalidate-memory))

(defvar gdb-memory-format-map
  (let ((map (make-sparse-keymap)))
    (define-key map [header-line down-mouse-3] 'gdb-memory-format-menu-1)
    map)
  "Keymap to select format in the header line.")

(defvar gdb-memory-format-menu (make-sparse-keymap "Format")
  "Menu of display formats in the header line.")

(define-key gdb-memory-format-menu [binary]
  '(menu-item "Binary" gdb-memory-format-binary
	      :button (:radio . (equal gdb-memory-format "t"))))
(define-key gdb-memory-format-menu [octal]
  '(menu-item "Octal" gdb-memory-format-octal
	      :button (:radio . (equal gdb-memory-format "o"))))
(define-key gdb-memory-format-menu [unsigned]
  '(menu-item "Unsigned Decimal" gdb-memory-format-unsigned
	      :button (:radio . (equal gdb-memory-format "u"))))
(define-key gdb-memory-format-menu [signed]
  '(menu-item "Signed Decimal" gdb-memory-format-signed
	      :button (:radio . (equal gdb-memory-format "d"))))
(define-key gdb-memory-format-menu [hexadecimal]
  '(menu-item "Hexadecimal" gdb-memory-format-hexadecimal
	      :button (:radio . (equal gdb-memory-format "x"))))

(defun gdb-memory-format-menu (event)
  (interactive "@e")
  (x-popup-menu event gdb-memory-format-menu))

(defun gdb-memory-format-menu-1 (event)
  (interactive "e")
  (save-selected-window
    (select-window (posn-window (event-start event)))
    (let* ((selection (gdb-memory-format-menu event))
	   (binding (and selection (lookup-key gdb-memory-format-menu
					       (vector (car selection))))))
      (if binding (call-interactively binding)))))

(defun gdb-memory-unit-giant ()
  "Set the unit size to giant words (eight bytes)."
  (interactive)
  (customize-set-variable 'gdb-memory-unit "g")
  (gdb-invalidate-memory))

(defun gdb-memory-unit-word ()
  "Set the unit size to words (four bytes)."
  (interactive)
  (customize-set-variable 'gdb-memory-unit "w")
  (gdb-invalidate-memory))

(defun gdb-memory-unit-halfword ()
  "Set the unit size to halfwords (two bytes)."
  (interactive)
  (customize-set-variable 'gdb-memory-unit "h")
  (gdb-invalidate-memory))

(defun gdb-memory-unit-byte ()
  "Set the unit size to bytes."
  (interactive)
  (customize-set-variable 'gdb-memory-unit "b")
  (gdb-invalidate-memory))

(defvar gdb-memory-unit-map
  (let ((map (make-sparse-keymap)))
    (define-key map [header-line down-mouse-3] 'gdb-memory-unit-menu-1)
    map)
  "Keymap to select units in the header line.")

(defvar gdb-memory-unit-menu (make-sparse-keymap "Unit")
  "Menu of units in the header line.")

(define-key gdb-memory-unit-menu [giantwords]
  '(menu-item "Giant words" gdb-memory-unit-giant
	      :button (:radio . (equal gdb-memory-unit "g"))))
(define-key gdb-memory-unit-menu [words]
  '(menu-item "Words" gdb-memory-unit-word
	      :button (:radio . (equal gdb-memory-unit "w"))))
(define-key gdb-memory-unit-menu [halfwords]
  '(menu-item "Halfwords" gdb-memory-unit-halfword
	      :button (:radio . (equal gdb-memory-unit "h"))))
(define-key gdb-memory-unit-menu [bytes]
  '(menu-item "Bytes" gdb-memory-unit-byte
	      :button (:radio . (equal gdb-memory-unit "b"))))

(defun gdb-memory-unit-menu (event)
  (interactive "@e")
  (x-popup-menu event gdb-memory-unit-menu))

(defun gdb-memory-unit-menu-1 (event)
  (interactive "e")
  (save-selected-window
    (select-window (posn-window (event-start event)))
    (let* ((selection (gdb-memory-unit-menu event))
	   (binding (and selection (lookup-key gdb-memory-unit-menu
					       (vector (car selection))))))
      (if binding (call-interactively binding)))))

;;from make-mode-line-mouse-map
(defun gdb-make-header-line-mouse-map (mouse function) "\
Return a keymap with single entry for mouse key MOUSE on the header line.
MOUSE is defined to run function FUNCTION with no args in the buffer
corresponding to the mode line clicked."
  (let ((map (make-sparse-keymap)))
    (define-key map (vector 'header-line mouse) function)
    (define-key map (vector 'header-line 'down-mouse-1) 'ignore)
    map))

(defvar gdb-memory-font-lock-keywords
  '(;; <__function.name+n>
    ("<\\(\\(\\sw\\|[_.]\\)+\\)\\(\\+[0-9]+\\)?>" (1 font-lock-function-name-face))
    )
  "Font lock keywords used in `gdb-memory-mode'.")

(defun gdb-memory-mode ()
  "Major mode for examining memory.

\\{gdb-memory-mode-map}"
  (kill-all-local-variables)
  (setq major-mode 'gdb-memory-mode)
  (setq mode-name "Memory")
  (setq buffer-read-only t)
  (use-local-map gdb-memory-mode-map)
  (setq header-line-format
	'(:eval
	  (concat
	   "Read address["
	   (propertize
	    "-"
	    'face font-lock-warning-face
	    'help-echo "mouse-1: decrement address"
	    'mouse-face 'mode-line-highlight
	    'local-map
	    (gdb-make-header-line-mouse-map
	     'mouse-1
	     (lambda () (interactive)
	       (let ((gdb-memory-address
		      ;; Let GDB do the arithmetic.
		      (concat
		       gdb-memory-address " - "
		       (number-to-string
			(* gdb-memory-repeat-count
			   (cond ((string= gdb-memory-unit "b") 1)
				 ((string= gdb-memory-unit "h") 2)
				 ((string= gdb-memory-unit "w") 4)
				 ((string= gdb-memory-unit "g") 8)))))))
		 (gdb-invalidate-memory)))))
	   "|"
	   (propertize "+"
		       'face font-lock-warning-face
		       'help-echo "mouse-1: increment address"
		       'mouse-face 'mode-line-highlight
		       'local-map (gdb-make-header-line-mouse-map
				   'mouse-1
				   (lambda () (interactive)
				     (let ((gdb-memory-address nil))
				       (gdb-invalidate-memory)))))
	   "]: "
	   (propertize gdb-memory-address
		       'face font-lock-warning-face
		       'help-echo "mouse-1: set memory address"
		       'mouse-face 'mode-line-highlight
		       'local-map (gdb-make-header-line-mouse-map
				   'mouse-1
				   #'gdb-memory-set-address))
	   "  Repeat Count: "
	   (propertize (number-to-string gdb-memory-repeat-count)
		       'face font-lock-warning-face
		       'help-echo "mouse-1: set repeat count"
		       'mouse-face 'mode-line-highlight
		       'local-map (gdb-make-header-line-mouse-map
				   'mouse-1
				   #'gdb-memory-set-repeat-count))
	   "  Display Format: "
	   (propertize gdb-memory-format
		       'face font-lock-warning-face
		       'help-echo "mouse-3: select display format"
		       'mouse-face 'mode-line-highlight
		       'local-map gdb-memory-format-map)
	   "  Unit Size: "
	   (propertize gdb-memory-unit
		       'face font-lock-warning-face
		       'help-echo "mouse-3: select unit size"
		       'mouse-face 'mode-line-highlight
		       'local-map gdb-memory-unit-map))))
  (set (make-local-variable 'font-lock-defaults)
       '(gdb-memory-font-lock-keywords))
  (run-mode-hooks 'gdb-memory-mode-hook)
  'gdb-invalidate-memory)

(defun gdb-memory-buffer-name ()
  (with-current-buffer gud-comint-buffer
    (concat "*memory of " (gdb-get-target-string) "*")))

(defun gdb-display-memory-buffer ()
  "Display memory contents."
  (interactive)
  (gdb-display-buffer
   (gdb-get-buffer-create 'gdb-memory-buffer) t))

(defun gdb-frame-memory-buffer ()
  "Display memory contents in a new frame."
  (interactive)
  (let* ((special-display-regexps (append special-display-regexps '(".*")))
	 (special-display-frame-alist
	  (cons '(left-fringe . 0)
		(cons '(right-fringe . 0)
		      (cons '(width . 83) gdb-frame-parameters)))))
    (display-buffer (gdb-get-buffer-create 'gdb-memory-buffer))))


;; Locals buffer.
;;
(gdb-set-buffer-rules 'gdb-locals-buffer
		      'gdb-locals-buffer-name
		      'gdb-locals-mode)

(def-gdb-auto-update-trigger gdb-invalidate-locals
  (gdb-get-buffer 'gdb-locals-buffer)
  "server info locals\n"
  gdb-info-locals-handler)

(defvar gdb-locals-watch-map
  (let ((map (make-sparse-keymap)))
    (suppress-keymap map)
    (define-key map "\r" (lambda () (interactive)
			   (beginning-of-line)
			   (gud-watch)))
    (define-key map [mouse-2] (lambda (event) (interactive "e")
				(mouse-set-point event)
				(beginning-of-line)
				(gud-watch)))
    map)
  "Keymap to create watch expression of a complex data type local variable.")

(defconst gdb-struct-string
  (concat (propertize "[struct/union]"
		      'mouse-face 'highlight
		      'help-echo "mouse-2: create watch expression"
		      'local-map gdb-locals-watch-map) "\n"))

(defconst gdb-array-string
  (concat " " (propertize "[array]"
			  'mouse-face 'highlight
			  'help-echo "mouse-2: create watch expression"
			  'local-map gdb-locals-watch-map) "\n"))

;; Abbreviate for arrays and structures.
;; These can be expanded using gud-display.
(defun gdb-info-locals-handler ()
  (setq gdb-pending-triggers (delq 'gdb-invalidate-locals
				  gdb-pending-triggers))
  (let ((buf (gdb-get-buffer 'gdb-partial-output-buffer)))
    (with-current-buffer buf
      (goto-char (point-min))
      (while (re-search-forward "^[ }].*\n" nil t)
	(replace-match "" nil nil))
      (goto-char (point-min))
      (while (re-search-forward "{\\(.*=.*\n\\|\n\\)" nil t)
	(replace-match gdb-struct-string nil nil))
      (goto-char (point-min))
      (while (re-search-forward "\\s-*{.*\n" nil t)
	(replace-match gdb-array-string nil nil))))
  (let ((buf (gdb-get-buffer 'gdb-locals-buffer)))
    (and buf
	 (with-current-buffer buf
	      (let* ((window (get-buffer-window buf 0))
		     (start (window-start window))
		     (p (window-point window))
		     (buffer-read-only nil))
		 (erase-buffer)
		 (insert-buffer-substring (gdb-get-buffer-create
					   'gdb-partial-output-buffer))
		(set-window-start window start)
		(set-window-point window p))
)))
  (run-hooks 'gdb-info-locals-hook))

(defvar gdb-locals-mode-map
  (let ((map (make-sparse-keymap)))
    (suppress-keymap map)
    (define-key map "q" 'kill-this-buffer)
     map))

(defun gdb-locals-mode ()
  "Major mode for gdb locals.

\\{gdb-locals-mode-map}"
  (kill-all-local-variables)
  (setq major-mode 'gdb-locals-mode)
  (setq mode-name (concat "Locals:" gdb-selected-frame))
  (setq buffer-read-only t)
  (use-local-map gdb-locals-mode-map)
  (set (make-local-variable 'font-lock-defaults)
       '(gdb-locals-font-lock-keywords))
  (run-mode-hooks 'gdb-locals-mode-hook)
  (if (and (eq (buffer-local-value 'gud-minor-mode gud-comint-buffer) 'gdba)
	   (string-equal gdb-version "pre-6.4"))
      'gdb-invalidate-locals
    'gdb-invalidate-locals-1))

(defun gdb-locals-buffer-name ()
  (with-current-buffer gud-comint-buffer
    (concat "*locals of " (gdb-get-target-string) "*")))

(defun gdb-display-locals-buffer ()
  "Display local variables of current stack and their values."
  (interactive)
  (gdb-display-buffer
   (gdb-get-buffer-create 'gdb-locals-buffer) t))

(defun gdb-frame-locals-buffer ()
  "Display local variables of current stack and their values in a new frame."
  (interactive)
  (let ((special-display-regexps (append special-display-regexps '(".*")))
	(special-display-frame-alist gdb-frame-parameters))
    (display-buffer (gdb-get-buffer-create 'gdb-locals-buffer))))


;;;; Window management
(defun gdb-display-buffer (buf dedicated &optional size)
  (let ((answer (get-buffer-window buf 0))
	(must-split nil))
    (if answer
	(display-buffer buf nil 0)	;Deiconify the frame if necessary.
      ;; The buffer is not yet displayed.
      (pop-to-buffer gud-comint-buffer)	;Select the right frame.
      (let ((window (get-lru-window)))
	(if (and window
		 (not (memq window `(,(get-buffer-window gud-comint-buffer)
				     ,gdb-source-window))))
	    (progn
	      (set-window-buffer window buf)
	      (setq answer window))
	  (setq must-split t)))
      (if must-split
	  (let* ((largest (get-largest-window))
		 (cur-size (window-height largest))
		 (new-size (and size (< size cur-size) (- cur-size size))))
	    (setq answer (split-window largest new-size))
	    (set-window-buffer answer buf)
	    (set-window-dedicated-p answer dedicated)))
      answer)))


;;; Shared keymap initialization:

(let ((menu (make-sparse-keymap "GDB-Windows")))
  (define-key gud-menu-map [displays]
    `(menu-item "GDB-Windows" ,menu
		:visible (memq gud-minor-mode '(gdbmi gdba))))
  (define-key menu [gdb] '("Gdb" . gdb-display-gdb-buffer))
  (define-key menu [threads] '("Threads" . gdb-display-threads-buffer))
  (define-key menu [inferior]
    '(menu-item "Separate IO" gdb-display-separate-io-buffer
		:enable gdb-use-separate-io-buffer))
  (define-key menu [memory] '("Memory" . gdb-display-memory-buffer))
  (define-key menu [registers] '("Registers" . gdb-display-registers-buffer))
  (define-key menu [disassembly]
    '("Disassembly" . gdb-display-assembler-buffer))
  (define-key menu [breakpoints]
    '("Breakpoints" . gdb-display-breakpoints-buffer))
  (define-key menu [locals] '("Locals" . gdb-display-locals-buffer))
  (define-key menu [frames] '("Stack" . gdb-display-stack-buffer)))

(let ((menu (make-sparse-keymap "GDB-Frames")))
  (define-key gud-menu-map [frames]
    `(menu-item "GDB-Frames" ,menu
		:visible (memq gud-minor-mode '(gdbmi gdba))))
  (define-key menu [gdb] '("Gdb" . gdb-frame-gdb-buffer))
  (define-key menu [threads] '("Threads" . gdb-frame-threads-buffer))
  (define-key menu [memory] '("Memory" . gdb-frame-memory-buffer))
  (define-key menu [inferior]
    '(menu-item "Separate IO" gdb-frame-separate-io-buffer
		:enable gdb-use-separate-io-buffer))
  (define-key menu [registers] '("Registers" . gdb-frame-registers-buffer))
  (define-key menu [disassembly] '("Disassembly" . gdb-frame-assembler-buffer))
  (define-key menu [breakpoints]
    '("Breakpoints" . gdb-frame-breakpoints-buffer))
  (define-key menu [locals] '("Locals" . gdb-frame-locals-buffer))
  (define-key menu [frames] '("Stack" . gdb-frame-stack-buffer)))

(let ((menu (make-sparse-keymap "GDB-UI/MI")))
  (define-key gud-menu-map [ui]
    `(menu-item (if (eq gud-minor-mode 'gdba) "GDB-UI" "GDB-MI")
		,menu :visible (memq gud-minor-mode '(gdbmi gdba))))
  (define-key menu [gdb-find-source-frame]
  '(menu-item "Look For Source Frame" gdb-find-source-frame
	      :visible (eq gud-minor-mode 'gdba)
	      :help "Toggle look for source frame."
	      :button (:toggle . gdb-find-source-frame)))
  (define-key menu [gdb-use-separate-io]
  '(menu-item "Separate IO" gdb-use-separate-io-buffer
	      :visible (eq gud-minor-mode 'gdba)
	      :help "Toggle separate IO for debugged program."
	      :button (:toggle . gdb-use-separate-io-buffer)))
  (define-key menu [gdb-many-windows]
  '(menu-item "Display Other Windows" gdb-many-windows
	      :help "Toggle display of locals, stack and breakpoint information"
	      :button (:toggle . gdb-many-windows)))
  (define-key menu [gdb-restore-windows]
  '(menu-item "Restore Window Layout" gdb-restore-windows
	      :help "Restore standard layout for debug session.")))

(defun gdb-frame-gdb-buffer ()
  "Display GUD buffer in a new frame."
  (interactive)
  (let ((special-display-regexps (append special-display-regexps '(".*")))
	(special-display-frame-alist
	 (remove '(menu-bar-lines) (remove '(tool-bar-lines)
					   gdb-frame-parameters)))
	(same-window-regexps nil))
    (display-buffer gud-comint-buffer)))

(defun gdb-display-gdb-buffer ()
  "Display GUD buffer."
  (interactive)
  (let ((same-window-regexps nil))
    (pop-to-buffer gud-comint-buffer)))

(defun gdb-set-window-buffer (name)
  (set-window-buffer (selected-window) (get-buffer name))
  (set-window-dedicated-p (selected-window) t))

(defun gdb-setup-windows ()
  "Layout the window pattern for `gdb-many-windows'."
  (gdb-display-locals-buffer)
  (gdb-display-stack-buffer)
  (delete-other-windows)
  (gdb-display-breakpoints-buffer)
  (delete-other-windows)
  ; Don't dedicate.
  (pop-to-buffer gud-comint-buffer)
  (split-window nil ( / ( * (window-height) 3) 4))
  (split-window nil ( / (window-height) 3))
  (split-window-horizontally)
  (other-window 1)
  (gdb-set-window-buffer (gdb-locals-buffer-name))
  (other-window 1)
  (switch-to-buffer
       (if gud-last-last-frame
	   (gud-find-file (car gud-last-last-frame))
	 (if gdb-main-file
	     (gud-find-file gdb-main-file)
	   ;; Put buffer list in window if we
	   ;; can't find a source file.
	   (list-buffers-noselect))))
  (setq gdb-source-window (selected-window))
  (when gdb-use-separate-io-buffer
    (split-window-horizontally)
    (other-window 1)
    (gdb-set-window-buffer
     (gdb-get-buffer-create 'gdb-inferior-io)))
  (other-window 1)
  (gdb-set-window-buffer (gdb-stack-buffer-name))
  (split-window-horizontally)
  (other-window 1)
  (gdb-set-window-buffer (gdb-breakpoints-buffer-name))
  (other-window 1))

(defun gdb-restore-windows ()
  "Restore the basic arrangement of windows used by gdba.
This arrangement depends on the value of `gdb-many-windows'."
  (interactive)
  (pop-to-buffer gud-comint-buffer)	;Select the right window and frame.
    (delete-other-windows)
  (if gdb-many-windows
      (gdb-setup-windows)
    (when (or gud-last-last-frame gdb-show-main)
      (split-window)
      (other-window 1)
      (switch-to-buffer
       (if gud-last-last-frame
	   (gud-find-file (car gud-last-last-frame))
	 (gud-find-file gdb-main-file)))
      (setq gdb-source-window (selected-window))
      (other-window 1))))

(defun gdb-reset ()
  "Exit a debugging session cleanly.
Kills the gdb buffers, and resets variables and the source buffers."
  (dolist (buffer (buffer-list))
    (unless (eq buffer gud-comint-buffer)
      (with-current-buffer buffer
	(if (memq gud-minor-mode '(gdbmi gdba))
	    (if (string-match "\\` ?\\*.+\\*\\'" (buffer-name))
		(kill-buffer nil)
	      (gdb-remove-breakpoint-icons (point-min) (point-max) t)
	      (setq gud-minor-mode nil)
	      (kill-local-variable 'tool-bar-map)
	      (kill-local-variable 'gdb-define-alist))))))
  (setq gdb-overlay-arrow-position nil)
  (setq overlay-arrow-variable-list
	(delq 'gdb-overlay-arrow-position overlay-arrow-variable-list))
  (setq fringe-indicator-alist '((overlay-arrow . right-triangle)))
  (setq gdb-stack-position nil)
  (setq overlay-arrow-variable-list
	(delq 'gdb-stack-position overlay-arrow-variable-list))
  (if (boundp 'speedbar-frame) (speedbar-timer-fn))
  (setq gud-running nil)
  (setq gdb-active-process nil)
  (setq gdb-var-list nil)
  (remove-hook 'after-save-hook 'gdb-create-define-alist t))

(defun gdb-source-info ()
  "Find the source file where the program starts and displays it with related
buffers."
  (goto-char (point-min))
  (if (and (search-forward "Located in " nil t)
	   (looking-at "\\S-+"))
      (setq gdb-main-file (match-string 0)))
  (goto-char (point-min))
  (if (search-forward "Includes preprocessor macro info." nil t)
      (setq gdb-macro-info t))
 (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)))))
 (setq gdb-ready t))

(defun gdb-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 (search-forward "Located in " nil t)
	(when (looking-at "\\S-+")
	  (delete (cons bptno "File not found") gdb-location-alist)
	  (push (cons bptno (match-string 0)) 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.\n\
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 0))
      (save-current-buffer
	(set (make-local-variable 'gud-minor-mode) 'gdba)
	(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)))))

(add-hook 'find-file-hook 'gdb-find-file-hook)

(defun gdb-find-file-hook ()
  "Set up buffer for debugging if file is part of the source code
of the current session."
  (if (and (buffer-name gud-comint-buffer)
	   ;; in case gud or gdb-ui is just loaded
	   gud-comint-buffer
	   (memq (buffer-local-value 'gud-minor-mode gud-comint-buffer)
	       '(gdba gdbmi)))
      ;;Pre GDB 6.3 "info sources" doesn't give absolute file name.
      (if (member (if (string-equal gdb-version "pre-6.4")
		      (file-name-nondirectory buffer-file-name)
		    buffer-file-name)
		  gdb-source-file-list)
	  (with-current-buffer (find-buffer-visiting buffer-file-name)
	    (set (make-local-variable 'gud-minor-mode)
		 (buffer-local-value 'gud-minor-mode gud-comint-buffer))
	    (set (make-local-variable 'tool-bar-map) gud-tool-bar-map)))))

;;from put-image
(defun gdb-put-string (putstring pos &optional dprop &rest sprops)
  "Put string PUTSTRING in front of POS in the current buffer.
PUTSTRING is displayed by putting an overlay into the current buffer with a
`before-string' string that has a `display' property whose value is
PUTSTRING."
  (let ((string (make-string 1 ?x))
	(buffer (current-buffer)))
    (setq putstring (copy-sequence putstring))
    (let ((overlay (make-overlay pos pos buffer))
	  (prop (or dprop
		    (list (list 'margin 'left-margin) putstring))))
      (put-text-property 0 1 'display prop string)
      (if sprops
	  (add-text-properties 0 1 sprops string))
      (overlay-put overlay 'put-break t)
      (overlay-put overlay 'before-string string))))

;;from remove-images
(defun gdb-remove-strings (start end &optional buffer)
  "Remove strings between START and END in BUFFER.
Remove only strings that were put in BUFFER with calls to `gdb-put-string'.
BUFFER nil or omitted means use the current buffer."
  (unless buffer
    (setq buffer (current-buffer)))
  (dolist (overlay (overlays-in start end))
    (when (overlay-get overlay 'put-break)
	  (delete-overlay overlay))))

(defun gdb-put-breakpoint-icon (enabled bptno)
  (if (string-match "[0-9+]+\\." bptno)
      (setq enabled gdb-parent-bptno-enabled))
  (let ((start (- (line-beginning-position) 1))
	(end (+ (line-end-position) 1))
	(putstring (if enabled "B" "b"))
	(source-window (get-buffer-window (current-buffer) 0)))
    (add-text-properties
     0 1 '(help-echo "mouse-1: clear bkpt, mouse-3: enable/disable bkpt")
     putstring)
    (if enabled
	(add-text-properties
	 0 1 `(gdb-bptno ,bptno gdb-enabled t) putstring)
      (add-text-properties
       0 1 `(gdb-bptno ,bptno gdb-enabled nil) putstring))
    (gdb-remove-breakpoint-icons start end)
    (if (display-images-p)
	(if (>= (or left-fringe-width
		    (if source-window (car (window-fringes source-window)))
		    gdb-buffer-fringe-width) 8)
	    (gdb-put-string
	     nil (1+ start)
	     `(left-fringe breakpoint
			   ,(if enabled
				'breakpoint-enabled
			      'breakpoint-disabled))
	     'gdb-bptno bptno
	     'gdb-enabled enabled)
	  (when (< left-margin-width 2)
	    (save-current-buffer
	      (setq left-margin-width 2)
	      (if source-window
		  (set-window-margins
		   source-window
		   left-margin-width right-margin-width))))
	  (put-image
	   (if enabled
	       (or breakpoint-enabled-icon
		   (setq breakpoint-enabled-icon
			 (find-image `((:type xpm :data
					      ,breakpoint-xpm-data
					      :ascent 100 :pointer hand)
				       (:type pbm :data
					      ,breakpoint-enabled-pbm-data
					      :ascent 100 :pointer hand)))))
	     (or breakpoint-disabled-icon
		 (setq breakpoint-disabled-icon
		       (find-image `((:type xpm :data
					    ,breakpoint-xpm-data
					    :conversion disabled
					    :ascent 100 :pointer hand)
				     (:type pbm :data
					    ,breakpoint-disabled-pbm-data
					    :ascent 100 :pointer hand))))))
	   (+ start 1)
	   putstring
	   'left-margin))
      (when (< left-margin-width 2)
	(save-current-buffer
	  (setq left-margin-width 2)
	  (let ((window (get-buffer-window (current-buffer) 0)))
	    (if window
		(set-window-margins
		 window left-margin-width right-margin-width)))))
      (gdb-put-string
       (propertize putstring
		   'face (if enabled 'breakpoint-enabled 'breakpoint-disabled))
       (1+ start)))))

(defun gdb-remove-breakpoint-icons (start end &optional remove-margin)
  (gdb-remove-strings start end)
  (if (display-images-p)
      (remove-images start end))
  (when remove-margin
    (setq left-margin-width 0)
    (let ((window (get-buffer-window (current-buffer) 0)))
      (if window
	  (set-window-margins
	   window left-margin-width right-margin-width)))))


;;
;; Assembler buffer.
;;
(gdb-set-buffer-rules 'gdb-assembler-buffer
		      'gdb-assembler-buffer-name
		      'gdb-assembler-mode)

;; We can't use def-gdb-auto-update-handler because we don't want to use
;; window-start but keep the overlay arrow/current line visible.
(defun gdb-assembler-handler ()
  (setq gdb-pending-triggers
	(delq 'gdb-invalidate-assembler
	      gdb-pending-triggers))
     (let ((buf (gdb-get-buffer 'gdb-assembler-buffer)))
       (and buf
	    (with-current-buffer buf
	      (let* ((window (get-buffer-window buf 0))
		     (p (window-point window))
		    (buffer-read-only nil))
		(erase-buffer)
		(insert-buffer-substring (gdb-get-buffer-create
					  'gdb-partial-output-buffer))
		(set-window-point window p)))))
     ;; put customisation here
     (gdb-assembler-custom))

(defun gdb-assembler-custom ()
  (let ((buffer (gdb-get-buffer 'gdb-assembler-buffer))
	(pos 1) (address) (flag) (bptno))
    (with-current-buffer buffer
      (save-excursion
	(if (not (equal gdb-pc-address "main"))
	    (progn
	      (goto-char (point-min))
	      (if (and gdb-pc-address
		       (search-forward gdb-pc-address nil t))
		  (progn
		    (setq pos (point))
		    (beginning-of-line)
		    (setq fringe-indicator-alist
			  (if (string-equal gdb-frame-number "0")
			      nil
			    '((overlay-arrow . hollow-right-triangle))))
		    (or gdb-overlay-arrow-position
			(setq gdb-overlay-arrow-position (make-marker)))
		    (set-marker gdb-overlay-arrow-position (point))))))
	;; remove all breakpoint-icons in assembler buffer before updating.
	(gdb-remove-breakpoint-icons (point-min) (point-max))))
    (with-current-buffer (gdb-get-buffer 'gdb-breakpoints-buffer)
      (goto-char (point-min))
      (while (< (point) (- (point-max) 1))
	(forward-line 1)
	(when (looking-at
	       "\\([0-9]+\\.?[0-9]*\\).*?\\s-+\\(.\\)\\s-+0x0*\\(\\S-+\\)")
	  (setq bptno (match-string 1))
	  (setq flag (char-after (match-beginning 2)))
	  (setq address (match-string 3))
	  (with-current-buffer buffer
	    (save-excursion
	      (goto-char (point-min))
	      (if (search-forward address nil t)
		  (gdb-put-breakpoint-icon (eq flag ?y) bptno)))))))
    (if (not (equal gdb-pc-address "main"))
	(with-current-buffer buffer
	  (set-window-point (get-buffer-window buffer 0) pos)))))

(defvar gdb-assembler-mode-map
  (let ((map (make-sparse-keymap)))
    (suppress-keymap map)
    (define-key map "q" 'kill-this-buffer)
     map))

(defvar gdb-assembler-font-lock-keywords
  '(;; <__function.name+n>
    ("<\\(\\(\\sw\\|[_.]\\)+\\)\\(\\+[0-9]+\\)?>"
     (1 font-lock-function-name-face))
    ;; 0xNNNNNNNN <__function.name+n>: opcode
    ("^0x[0-9a-f]+ \\(<\\(\\(\\sw\\|[_.]\\)+\\)\\+[0-9]+>\\)?:[ \t]+\\(\\sw+\\)"
     (4 font-lock-keyword-face))
    ;; %register(at least i386)
    ("%\\sw+" . font-lock-variable-name-face)
    ("^\\(Dump of assembler code for function\\) \\(.+\\):"
     (1 font-lock-comment-face)
     (2 font-lock-function-name-face))
    ("^\\(End of assembler dump\\.\\)" . font-lock-comment-face))
  "Font lock keywords used in `gdb-assembler-mode'.")

(defun gdb-assembler-mode ()
  "Major mode for viewing code assembler.

\\{gdb-assembler-mode-map}"
  (kill-all-local-variables)
  (setq major-mode 'gdb-assembler-mode)
  (setq mode-name (concat "Machine:" gdb-selected-frame))
  (setq gdb-overlay-arrow-position nil)
  (add-to-list 'overlay-arrow-variable-list 'gdb-overlay-arrow-position)
  (setq fringes-outside-margins t)
  (setq buffer-read-only t)
  (use-local-map gdb-assembler-mode-map)
  (gdb-invalidate-assembler)
  (set (make-local-variable 'font-lock-defaults)
       '(gdb-assembler-font-lock-keywords))
  (run-mode-hooks 'gdb-assembler-mode-hook)
  'gdb-invalidate-assembler)

(defun gdb-assembler-buffer-name ()
  (with-current-buffer gud-comint-buffer
    (concat "*disassembly of " (gdb-get-target-string) "*")))

(defun gdb-display-assembler-buffer ()
  "Display disassembly view."
  (interactive)
  (setq gdb-previous-frame nil)
  (gdb-display-buffer
   (gdb-get-buffer-create 'gdb-assembler-buffer) t))

(defun gdb-frame-assembler-buffer ()
  "Display disassembly view in a new frame."
  (interactive)
  (setq gdb-previous-frame nil)
  (let ((special-display-regexps (append special-display-regexps '(".*")))
	(special-display-frame-alist gdb-frame-parameters))
    (display-buffer (gdb-get-buffer-create 'gdb-assembler-buffer))))

;; modified because if gdb-pc-address has changed value a new command
;; must be enqueued to update the buffer with the new output
(defun gdb-invalidate-assembler (&optional ignored)
  (if (gdb-get-buffer 'gdb-assembler-buffer)
      (progn
	(unless (and gdb-selected-frame
		     (string-equal gdb-selected-frame gdb-previous-frame))
	  (if (or (not (member 'gdb-invalidate-assembler
			       gdb-pending-triggers))
		  (not (string-equal gdb-pc-address
				     gdb-previous-frame-address)))
	  (progn
	    ;; take previous disassemble command, if any, off the queue
	    (with-current-buffer gud-comint-buffer
	      (let ((queue gdb-input-queue))
		(dolist (item queue)
		  (if (equal (cdr item) '(gdb-assembler-handler))
		      (setq gdb-input-queue
			    (delete item gdb-input-queue))))))
	    (gdb-enqueue-input
	     (list
	      (concat gdb-server-prefix "disassemble "
		      (if (member gdb-pc-address '(nil "main")) nil "0x")
			   gdb-pc-address "\n")
		   'gdb-assembler-handler))
	    (push 'gdb-invalidate-assembler gdb-pending-triggers)
	    (setq gdb-previous-frame-address gdb-pc-address)
	    (setq gdb-previous-frame gdb-selected-frame)))))))

(defun gdb-get-selected-frame ()
  (if (not (member 'gdb-get-selected-frame gdb-pending-triggers))
      (progn
	(gdb-enqueue-input
	 (list (concat gdb-server-prefix "info frame\n") 'gdb-frame-handler))
	(push 'gdb-get-selected-frame
	       gdb-pending-triggers))))

(defun gdb-frame-handler ()
  (setq gdb-pending-triggers
	(delq 'gdb-get-selected-frame gdb-pending-triggers))
  (goto-char (point-min))
  (when (re-search-forward
       "Stack level \\([0-9]+\\), frame at \\(0x[[:xdigit:]]+\\)" nil t)
    (setq gdb-frame-number (match-string 1))
    (setq gdb-frame-address (match-string 2)))
  (goto-char (point-min))
  (when (re-search-forward ".*=\\s-+0x0*\\(\\S-*\\)\\s-+in\\s-+\\(.*?\\)\
\\(?: (\\(\\S-+?\\):[0-9]+?)\\)*; "
     nil t)
    (setq gdb-selected-frame (match-string 2))
    (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))))
    (setq gdb-pc-address (match-string 1))
    (if (and (match-string 3) gud-overlay-arrow-position)
      (let ((buffer (marker-buffer gud-overlay-arrow-position))
	    (position (marker-position gud-overlay-arrow-position)))
	(when (and buffer
		   (string-equal (file-name-nondirectory
				  (buffer-file-name buffer))
				 (file-name-nondirectory (match-string 3))))
	  (with-current-buffer buffer
	    (setq fringe-indicator-alist
		  (if (string-equal gdb-frame-number "0")
		      nil
		    '((overlay-arrow . hollow-right-triangle))))
	    (set-marker gud-overlay-arrow-position position))))))
  (goto-char (point-min))
  (if (re-search-forward " source language \\(\\S-+\\)\." nil t)
      (setq gdb-current-language (match-string 1)))
  (gdb-invalidate-assembler))


;; Code specific to GDB 6.4
(defconst gdb-source-file-regexp-1 "fullname=\"\\(.*?\\)\"")

(defun gdb-set-gud-minor-mode-existing-buffers-1 ()
  "Create list of source files for current GDB session.
If buffers already exist for any of these files, `gud-minor-mode'
is set in them."
  (goto-char (point-min))
  (while (re-search-forward gdb-source-file-regexp-1 nil t)
    (push (match-string 1) gdb-source-file-list))
  (dolist (buffer (buffer-list))
    (with-current-buffer buffer
      (when (member buffer-file-name gdb-source-file-list)
	(set (make-local-variable 'gud-minor-mode)
	     (buffer-local-value 'gud-minor-mode gud-comint-buffer))
	(set (make-local-variable 'tool-bar-map) gud-tool-bar-map)
	(when gud-tooltip-mode
	  (make-local-variable 'gdb-define-alist)
	  (gdb-create-define-alist)
	  (add-hook 'after-save-hook 'gdb-create-define-alist nil t)))))
  (gdb-force-mode-line-update
   (propertize "ready" 'face font-lock-variable-name-face)))

; Uses "-var-list-children --all-values".  Needs GDB 6.4 onwards.
(defun gdb-var-list-children-1 (varnum)
  (gdb-enqueue-input
   (list
    (if (eq (buffer-local-value 'gud-minor-mode gud-comint-buffer) 'gdba)
	(concat "server interpreter mi \"-var-list-children --all-values \\\""
		varnum "\\\"\"\n")
      (concat "-var-list-children --all-values \"" varnum "\"\n"))
    `(lambda () (gdb-var-list-children-handler-1 ,varnum)))))

(defconst gdb-var-list-children-regexp-1
  "child={.*?name=\"\\(.+?\\)\",.*?exp=\"\\(.+?\\)\",.*?\
numchild=\"\\(.+?\\)\",.*?value=\\(\".*?\"\\)\
\\(}\\|,.*?\\(type=\"\\(.+?\\)\"\\)?.*?}\\)")

(defun gdb-var-list-children-handler-1 (varnum)
  (goto-char (point-min))
  (let ((var-list nil))
    (catch 'child-already-watched
      (dolist (var gdb-var-list)
	(if (string-equal varnum (car var))
	    (progn
	      (push var var-list)
	      (while (re-search-forward gdb-var-list-children-regexp-1 nil t)
		(let ((varchild (list (match-string 1)
				      (match-string 2)
				      (match-string 3)
				      (match-string 7)
				      (read (match-string 4))
				      nil)))
		  (if (assoc (car varchild) gdb-var-list)
		      (throw 'child-already-watched nil))
		  (push varchild var-list))))
	  (push var var-list)))
      (setq gdb-var-list (nreverse var-list))))
  (gdb-speedbar-update))

; Uses "-var-update --all-values".  Needs GDB 6.4 onwards.
(defun gdb-var-update-1 ()
  (if (not (member 'gdb-var-update gdb-pending-triggers))
      (progn
	(gdb-enqueue-input
	 (list
	  (if (eq (buffer-local-value 'gud-minor-mode gud-comint-buffer) 'gdba)
	      "server interpreter mi \"-var-update --all-values *\"\n"
	    "-var-update --all-values *\n")
	  'gdb-var-update-handler-1))
	(push 'gdb-var-update gdb-pending-triggers))))

(defconst gdb-var-update-regexp-1
  "{.*?name=\"\\(.*?\\)\",.*?\\(?:value=\\(\".*?\"\\),\\)?.*?\
in_scope=\"\\(.*?\\)\".*?}")

(defun gdb-var-update-handler-1 ()
  (dolist (var gdb-var-list)
    (setcar (nthcdr 5 var) nil))
  (goto-char (point-min))
  (while (re-search-forward gdb-var-update-regexp-1 nil t)
    (let* ((varnum (match-string 1))
	   (var (assoc varnum gdb-var-list)))
      (when var
	(let ((match (match-string 3)))
	  (cond ((string-equal match "false")
		 (if gdb-delete-out-of-scope
		     (gdb-var-delete-1 varnum)
		   (setcar (nthcdr 5 var) 'out-of-scope)))
		((string-equal match "true")
		 (setcar (nthcdr 5 var) 'changed)
		 (setcar (nthcdr 4 var)
			 (read (match-string 2))))
		((string-equal match "invalid")
		 (gdb-var-delete-1 varnum)))))))
      (setq gdb-pending-triggers
	    (delq 'gdb-var-update gdb-pending-triggers))
      (gdb-speedbar-update))

;; Registers buffer.
;;
(gdb-set-buffer-rules 'gdb-registers-buffer
		      'gdb-registers-buffer-name
		      'gdb-registers-mode)

(def-gdb-auto-update-trigger gdb-invalidate-registers-1
  (gdb-get-buffer 'gdb-registers-buffer)
  (if (eq (buffer-local-value 'gud-minor-mode gud-comint-buffer) 'gdba)
      "server interpreter mi \"-data-list-register-values x\"\n"
    "-data-list-register-values x\n")
    gdb-data-list-register-values-handler)

(defconst gdb-data-list-register-values-regexp
  "{.*?number=\"\\(.*?\\)\",.*?value=\"\\(.*?\\)\".*?}")

(defun gdb-data-list-register-values-handler ()
  (setq gdb-pending-triggers (delq 'gdb-invalidate-registers-1
				   gdb-pending-triggers))
  (goto-char (point-min))
  (if (re-search-forward gdb-error-regexp nil t)
      (let ((err (match-string 1)))
	(with-current-buffer (gdb-get-buffer 'gdb-registers-buffer)
	  (let ((buffer-read-only nil))
	    (erase-buffer)
	    (put-text-property 0 (length err) 'face font-lock-warning-face err)
	    (insert err)
	    (goto-char (point-min)))))
    (let ((register-list (reverse gdb-register-names))
	  (register nil) (register-string nil) (register-values nil))
      (goto-char (point-min))
      (while (re-search-forward gdb-data-list-register-values-regexp nil t)
	(setq register (pop register-list))
	(setq register-string (concat register "\t" (match-string 2) "\n"))
	(if (member (match-string 1) gdb-changed-registers)
	    (put-text-property 0 (length register-string)
			       'face 'font-lock-warning-face
			       register-string))
	(setq register-values
	      (concat register-values register-string)))
      (let ((buf (gdb-get-buffer 'gdb-registers-buffer)))
	(with-current-buffer buf
	  (let* ((window (get-buffer-window buf 0))
		 (start (window-start window))
		 (p (window-point window))
		 (buffer-read-only nil))
	    (erase-buffer)
	    (insert register-values)
	    (set-window-start window start)
	    (set-window-point window p))))))
  (gdb-data-list-register-values-custom))

(defun gdb-data-list-register-values-custom ()
  (with-current-buffer (gdb-get-buffer 'gdb-registers-buffer)
    (save-excursion
      (let ((buffer-read-only nil)
	    start end)
	(goto-char (point-min))
	(while (< (point) (point-max))
	  (setq start (line-beginning-position))
	  (setq end (line-end-position))
	  (when (looking-at "^[^\t]+")
	    (unless (string-equal (match-string 0) "No registers.")
	      (put-text-property start (match-end 0)
				 'face font-lock-variable-name-face)
	      (add-text-properties start end
		                   '(help-echo "mouse-2: edit value"
				     mouse-face highlight))))
	  (forward-line 1))))))

;; Needs GDB 6.4 onwards (used to fail with no stack).
(defun gdb-get-changed-registers ()
  (if (and (gdb-get-buffer 'gdb-registers-buffer)
	   (not (member 'gdb-get-changed-registers gdb-pending-triggers)))
      (progn
	(gdb-enqueue-input
	 (list
	  (if (eq (buffer-local-value 'gud-minor-mode gud-comint-buffer) 'gdba)
	      "server interpreter mi -data-list-changed-registers\n"
	    "-data-list-changed-registers\n")
	  'gdb-get-changed-registers-handler))
	(push 'gdb-get-changed-registers gdb-pending-triggers))))

(defconst gdb-data-list-register-names-regexp "\"\\(.*?\\)\"")

(defun gdb-get-changed-registers-handler ()
  (setq gdb-pending-triggers
	(delq 'gdb-get-changed-registers gdb-pending-triggers))
  (setq gdb-changed-registers nil)
  (goto-char (point-min))
  (while (re-search-forward gdb-data-list-register-names-regexp nil t)
    (push (match-string 1) gdb-changed-registers)))


;; Locals buffer.
;;
;; uses "-stack-list-locals --simple-values". Needs GDB 6.1 onwards.
(gdb-set-buffer-rules 'gdb-locals-buffer
		      'gdb-locals-buffer-name
		      'gdb-locals-mode)

(def-gdb-auto-update-trigger gdb-invalidate-locals-1
  (gdb-get-buffer 'gdb-locals-buffer)
  (if (eq (buffer-local-value 'gud-minor-mode gud-comint-buffer) 'gdba)
      "server interpreter mi -\"stack-list-locals --simple-values\"\n"
    "-stack-list-locals --simple-values\n")
  gdb-stack-list-locals-handler)

(defconst gdb-stack-list-locals-regexp
  "{.*?name=\"\\(.*?\\)\",.*?type=\"\\(.*?\\)\"")

(defvar gdb-locals-watch-map-1
  (let ((map (make-sparse-keymap)))
    (suppress-keymap map)
    (define-key map "\r" 'gud-watch)
    (define-key map [mouse-2] 'gud-watch)
    map)
  "Keymap to create watch expression of a complex data type local variable.")

(defvar gdb-edit-locals-map-1
  (let ((map (make-sparse-keymap)))
    (suppress-keymap map)
    (define-key map "\r" 'gdb-edit-locals-value)
    (define-key map [mouse-2] 'gdb-edit-locals-value)
    map)
  "Keymap to edit value of a simple data type local variable.")

(defun gdb-edit-locals-value (&optional event)
  "Assign a value to a variable displayed in the locals buffer."
  (interactive (list last-input-event))
  (save-excursion
    (if event (posn-set-point (event-end event)))
    (beginning-of-line)
    (let* ((var (current-word))
	   (value (read-string (format "New value (%s): " var))))
      (gdb-enqueue-input
       (list (concat  gdb-server-prefix"set variable " var " = " value "\n")
	     'ignore)))))

;; Dont display values of arrays or structures.
;; These can be expanded using gud-watch.
(defun gdb-stack-list-locals-handler ()
  (setq gdb-pending-triggers (delq 'gdb-invalidate-locals-1
				  gdb-pending-triggers))
  (goto-char (point-min))
  (if (re-search-forward gdb-error-regexp nil t)
      (let ((err (match-string 1)))
	(with-current-buffer (gdb-get-buffer 'gdb-locals-buffer)
	  (let ((buffer-read-only nil))
	    (erase-buffer)
	    (insert err)
	    (goto-char (point-min)))))
    (let (local locals-list)
      (goto-char (point-min))
      (while (re-search-forward gdb-stack-list-locals-regexp nil t)
	(let ((local (list (match-string 1)
			   (match-string 2)
			   nil)))
	  (if (looking-at ",value=\\(\".*\"\\).*?}")
	      (setcar (nthcdr 2 local) (read (match-string 1))))
	  (push local locals-list)))
      (let ((buf (gdb-get-buffer 'gdb-locals-buffer)))
	(and buf (with-current-buffer buf
		   (let* ((window (get-buffer-window buf 0))
			  (start (window-start window))
			  (p (window-point window))
			  (buffer-read-only nil) (name) (value))
		     (erase-buffer)
		     (dolist (local locals-list)
		       (setq name (car local))
		       (setq value (nth 2 local))
		       (if (or (not value)
			       (string-match "^\\0x" value))
			   (add-text-properties 0 (length name)
			        `(mouse-face highlight
			          help-echo "mouse-2: create watch expression"
			          local-map ,gdb-locals-watch-map-1)
				name)
			 (add-text-properties 0 (length value)
			      `(mouse-face highlight
			        help-echo "mouse-2: edit value"
			        local-map ,gdb-edit-locals-map-1)
			      value))
		       (insert
			(concat name "\t" (nth 1 local)
				"\t" value "\n")))
		     (set-window-start window start)
		     (set-window-point window p))))))))

(defun gdb-get-register-names ()
  "Create a list of register names."
  (goto-char (point-min))
  (setq gdb-register-names nil)
  (while (re-search-forward gdb-data-list-register-names-regexp nil t)
    (push (match-string 1) gdb-register-names)))

(provide 'gdb-ui)

;; arch-tag: e9fb00c5-74ef-469f-a088-37384caae352
;;; gdb-ui.el ends here
