(gdb-set-gud-minor-mode-existing-buffers):

[gnu-emacs] / lisp / progmodes / gdb-ui.el

;;; 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
;; 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 2, 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. However, if you have customised
;; gud-gdb-command-name, then start it with M-x gdba.

;; 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, then 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>'.  A file called gdb-mi.el is included with
;; GDB (6.2 onwards) that uses GDB/MI as the primary interface to GDB.  It is
;; still under development and is part of a process to migrate Emacs from
;; annotations to GDB/MI.

;; This mode SHOULD WORK WITH GDB 5.0 onwards but you will NEED GDB 6.0
;; onwards to use watch expressions.  It works best with GDB 6.4 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.

;;; Known Bugs:

;; 1) Strings that are watched don't update in the speedbar when their
;; contents change unless the first character changes.
;; 2) Cannot handle multiple debug sessions.
;; 3) Initially, the assembler buffer does not display the cursor at the
;; current line if the line is not visible in the window (but when testing
;; gdb-assembler-custom with a lisp debugger it does!).

;;; Problems with watch expressions, GDB/MI:
;; 1) They go out of scope when the inferior is re-run.
;; 2) -stack-list-locals has a type field but also prints type in values field.
;; 3) VARNUM increments even when variable object is not created
;;    (maybe trivial).

;; Known Bugs:
;; 1) M-x gdb doesn't work with "run" command in .gdbinit, use M-x gdba instead.

;;; 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?
;; 4) With gud-print and gud-pstar, print the variable name in the GUD
;;    buffer instead of the value's history number.

;;; Code:

(require 'gud)

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

(defvar gdb-frame-address "main" "Initialization for Assembler buffer.")
(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) where
STATUS is nil (unchanged), `changed' or `out-of-scope'.")
(defvar gdb-force-update t
 "Non-nil means that view of watch expressions will be updated in the speedbar.")
(defvar gdb-main-file nil "Source file from which program execution begins.")
(defvar gdb-overlay-arrow-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.")
(defvar gdb-active-process nil "GUD tooltips display variable values when t, \
and #define directives 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-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 gdba (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     |
+-----------------------------------+----------------------------------+"
  ;;
  (interactive (list (gud-query-cmdline 'gdba)))
  ;;
  ;; Let's start with a basic gud-gdb buffer and then modify it a bit.
  (gdb command-line)
  (gdb-init-1))

(defcustom gdb-debug-ring-max 128
  "Maximum size of `gdb-debug-ring'."
  :group 'gud
  :type 'integer
  :version "22.1")

(defvar gdb-debug-ring nil
  "List of commands, most recent first, sent to and replies received from GDB.
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-ring'."
  :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
  "Nil means just pop 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.  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 inferior 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 arg, display additional buffers iff arg is positive."
  (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 inferior.
With arg, use separate IO iff arg is positive."
  (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 inferior 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
              (call-process shell-file-name
                            (if (file-exists-p file) file nil)
                            (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)))))))

(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 ()
  (set (make-local-variable 'gud-minor-mode) 'gdba)
  (set (make-local-variable 'gud-marker-filter) 'gud-gdba-marker-filter)
  ;;
  (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-fringe mouse-2]
    'gdb-mouse-until)
  (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-2]
    '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-2]
    'gdb-mouse-jump)
  (define-key gud-minor-mode-map [left-margin C-mouse-2]
    'gdb-mouse-jump)
   (define-key gud-minor-mode-map [left-margin mouse-3]
    'gdb-mouse-toggle-breakpoint-margin)
  (define-key gud-minor-mode-map [left-fringe mouse-3]
    'gdb-mouse-toggle-breakpoint-fringe)

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

  ;; (re-)initialize
  (setq gdb-frame-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-force-update t
        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-flush-pending-output nil
        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-ring nil
        gdb-signalled nil
        gdb-source-window nil
        gdb-inferior-status nil
        gdb-continuation 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 'gdba-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))

(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-2
on the fringe/margin or dragging the arrow with mouse-1 (default bindings)."
  (interactive "e")
  (if gud-overlay-arrow-position
      (let ((start (event-start event))
            (end  (event-end event))
            (buffer (marker-buffer gud-overlay-arrow-position)) (line))
        (if (not (string-match "Machine" mode-name))
            (if (equal buffer (window-buffer (posn-window end)))
                (with-current-buffer buffer
                  (when (or (equal start end)
                            (equal (posn-point start)
                                   (marker-position
                                    gud-overlay-arrow-position)))
                    (setq line (line-number-at-pos (posn-point end)))
                    (gud-call (concat "until " (number-to-string line))))))
          (if (equal (marker-buffer gdb-overlay-arrow-position)
                     (window-buffer (posn-window end)))
              (when (or (equal start end)
                        (equal (posn-point start)
                               (marker-position
                                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 mouse-2
on the fringe/margin or dragging the arrow with mouse-1 (default bindings).
Unlike gdb-mouse-until the destination address can be before the current
line, and no execution takes place."
  (interactive "e")
  (if gud-overlay-arrow-position
      (let ((start (event-start event))
            (end  (event-end event))
            (buffer (marker-buffer gud-overlay-arrow-position)) (line))
        (if (not (string-match "Machine" mode-name))
            (if (equal buffer (window-buffer (posn-window end)))
                (with-current-buffer buffer
                  (when (or (equal start end)
                            (equal (posn-point start)
                                   (marker-position
                                    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)))))))
          (if (equal (marker-buffer gdb-overlay-arrow-position)
                     (window-buffer (posn-window end)))
              (when (or (equal start end)
                        (equal (posn-point start)
                               (marker-position
                                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 arg, automatically raise speedbar iff arg is positive."
  (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)
                          (tooltip-identifier-from-point (point)))))
              (catch 'already-watched
                (dolist (var gdb-var-list)
                  (unless (string-match "\\." (car var))
                    (if (string-equal expr (nth 1 var))
                        (throw 'already-watched nil))))
                (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=\"\\(.*?\\)\",.*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 3)
                  nil nil)))
        (push var gdb-var-list)
        (speedbar 1)
        (unless (string-equal
                 speedbar-initial-expansion-list-name "GUD")
          (speedbar-change-initial-expansion-list "GUD"))
        (gdb-enqueue-input
         (list
          (if (eq (buffer-local-value 'gud-minor-mode gud-comint-buffer) 'gdba)
              (concat "server interpreter mi \"-var-evaluate-expression "
                      (car var) "\"\n")
            (concat "-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-var-evaluate-expression-handler (varnum changed)
  (goto-char (point-min))
  (re-search-forward ".*value=\\(\".*\"\\)" nil t)
  (let ((var (assoc varnum gdb-var-list)))
    (when var
      (if changed (setcar (nthcdr 5 var) 'changed))
      (setcar (nthcdr 4 var) (read (match-string 1))))))

(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 4)
                                      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 \"-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))
  (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)))
        (gdb-enqueue-input
         (list
          (concat "server interpreter mi \"-var-evaluate-expression "
                  varnum "\"\n")
          `(lambda () (gdb-var-evaluate-expression-handler ,varnum t)))))))
  (setq gdb-pending-triggers
        (delq 'gdb-var-update gdb-pending-triggers))
  (when (and (boundp 'speedbar-frame) (frame-live-p speedbar-frame))
    ;; Dummy command to update speedbar at right time.
    (gdb-enqueue-input (list "server pwd\n" 'gdb-speedbar-refresh))
    ;; Keep gdb-pending-triggers non-nil till end.
    (push 'gdb-speedbar-refresh gdb-pending-triggers)))

(defun gdb-speedbar-refresh ()
  (setq gdb-pending-triggers
        (delq 'gdb-speedbar-refresh gdb-pending-triggers))
  (with-current-buffer gud-comint-buffer
    (let ((speedbar-verbosity-level 0)
          (speedbar-shown-directories nil))
      (save-excursion
        (speedbar-refresh)))))

(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 ((text (speedbar-line-text)))
        (string-match "\\(\\S-+\\)" text)
        (let ((expr (match-string 1 text)) var varnum)
          (catch 'expr-found
            (dolist (var1 gdb-var-list)
              (when (string-equal expr (nth 1 var1))
                (setq var var1)
                (setq varnum (car var1))
                (throw 'expr-found nil))))
          (unless (string-match "\\." (car var))
            (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-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")

(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."
  (cond ((string-match "+" text)        ;expand this node
         (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))))
         (speedbar-change-expand-button-char ?+)
         (speedbar-delete-subblock indent))
        (t (error "Ooops...  not sure what to do")))
  (speedbar-center-buffer-smartly))

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

;;
;; 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)
          "*"))

\f
(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))))

(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 inferior 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)))
\f

;; 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."
  (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-ring))
            (process-send-string proc item)))
      (if (string-match "\\\\$" string)
          (setq gdb-continuation (concat gdb-continuation string "\n"))
        (let ((item (concat gdb-continuation string "\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))
    (and queue
         (let ((last (car (last queue))))
           (unless (nbutlast queue) (setq gdb-input-queue '()))
           last))))

(defun gdb-send-item (item)
  (setq gdb-flush-pending-output nil)
  (if gdb-enable-debug (push (cons 'send-item item) gdb-debug-ring))
  (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)))))
\f
;;
;; 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-gdba-command-name "gdb -annotate=3"
  "Default command to execute an executable under the GDB-UI debugger."
  :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 "stopped")
  (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-frame-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-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)
  (let ((sink gdb-output-sink))
    (cond
     ((eq sink 'user)
      (progn
        (setq gud-running t)
        (setq gdb-inferior-status "running")
        (gdb-force-mode-line-update gdb-inferior-status)
        (gdb-remove-text-properties)
        (setq gud-overlay-arrow-position nil)
        (setq gdb-overlay-arrow-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 gdb-inferior-status)
  (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-inferior-status "exited")
  (gdb-force-mode-line-update gdb-inferior-status)
  (gdb-stopping ignored))

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

(defun gdb-frame-begin (ignored)
  (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)))))

(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
              (not gud-last-last-frame))
    (gud-display-line (car gud-last-last-frame) (cdr gud-last-last-frame)))
  (unless (member gdb-inferior-status '("exited" "signal"))
    (setq gdb-inferior-status "stopped")
    (gdb-force-mode-line-update gdb-inferior-status))
  (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-frame-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))
        (setq gdb-force-update t)
        (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))

(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-ring)
        (if (> (length gdb-debug-ring) gdb-debug-ring-max)
          (setcdr (nthcdr (1- gdb-debug-ring-max) gdb-debug-ring) 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)))
          ;;
          ;; Stuff prior to the match is just ordinary output.
          ;; It is either concatenated to OUTPUT or directed
          ;; elsewhere.
          (setq output
                (gdb-concat-output
                 output
                 (substring gud-marker-acc 0 (match-beginning 0))))
          ;;
          ;; Take that stuff off the gud-marker-acc.
          (setq gud-marker-acc (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)))
            ;; Call the handler for this annotation.
            (if annotation-rule
                (funcall (car (cdr annotation-rule))
                         annotation-arguments)
              ;; 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))))

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

;; 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)))

\f
;;
;; 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 "red"
     :weight bold))
  "Face for enabled breakpoint icon in fringe."
  :group 'gud)

(defface breakpoint-disabled
  ;; We use different values of grey for different background types,
  ;; so that on low-color displays it will end up as something visible
  ;; if it has to be approximated.
  '((t :foreground  "grey70"))
  "Face for disabled breakpoint icon in fringe."
  :group 'gud)

;; 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
        (goto-char (point-min))
        (while (< (point) (- (point-max) 1))
          (forward-line 1)
          (if (looking-at "[^\t].*?breakpoint")
              (progn
                (looking-at "\\([0-9]+\\)\\s-+\\S-+\\s-+\\S-+\\s-+\\(.\\)")
                (setq bptno (match-string 1))
                (setq flag (char-after (match-beginning 2)))
                (beginning-of-line)
                (if (re-search-forward " in \\(.*\\) at\\s-+" nil t)
                    (progn
                      (let ((buffer-read-only nil))
                        (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)) (buffer-read-only nil)
                            (file (match-string 1)))
                        (add-text-properties (line-beginning-position)
                                             (line-end-position)
                         '(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))))))))))
          (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 (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)))))))

(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)
                (gdb-enqueue-input
                 (list
                  (let ((bptno (get-text-property
                                0 'gdb-bptno (car (posn-string posn)))))
                    (concat gdb-server-prefix
                            (if (get-text-property
                                 0 'gdb-enabled (car (posn-string posn)))
                                "disable "
                              "enable ")
                            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)
            (gdb-enqueue-input
             (list
              (concat gdb-server-prefix
               (if (get-text-property 0 'gdb-enabled obj)
                   "disable "
                 "enable ")
               (get-text-property 0 'gdb-bptno obj) "\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)))

(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))

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

(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 2)))
                      "disable "
                    "enable ")
                  (match-string 1) "\n") 'ignore))
      (error "Not recognized as break/watchpoint line"))))

(defun gdb-delete-breakpoint ()
  "Delete the breakpoint at current line."
  (interactive)
  (beginning-of-line 1)
  (if (looking-at gdb-breakpoint-regexp)
      (gdb-enqueue-input
       (list
        (concat gdb-server-prefix "delete " (match-string 1) "\n") 'ignore))
    (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]+\\) .+ 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 (unless (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."))))
\f

;; Frames buffer.  This displays a perpetually correct bactracktrace
;; (from the command `where').
;;
;; Alas, if your stack is deep, it is costly.
;;
(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
  "server info stack\n"
  gdb-info-stack-handler
  gdb-info-stack-custom)

(defun gdb-info-stack-custom ()
  (with-current-buffer (gdb-get-buffer 'gdb-stack-buffer)
    (save-excursion
      (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)
                (put-text-property bl (+ bl 4)
                                   'face '(:inverse-video t)))
            (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))))))

(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)))

(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 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-no-properties 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)))
  (gdb-enqueue-input
   (list (concat gdb-server-prefix "frame "
                 (gdb-get-frame-number) "\n") 'ignore))
  (gud-display-frame))
\f

;; 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))
      (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)))

(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))
\f

;; 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)))

(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)))
\f

;; 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)))

(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 gdb-frame-parameters))
    (display-buffer (gdb-get-buffer-create 'gdb-memory-buffer))))
\f

;; 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)))
    (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)))

(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))))
\f

;;;; Window management
(defun gdb-display-buffer (buf &optional size)
  (let ((answer (get-buffer-window buf 0))
        (must-split nil))
    (if answer
        (display-buffer buf nil 0)      ;Raise 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 (eq window (get-buffer-window gud-comint-buffer))))
            (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 t)))
      answer)))

\f
;;; 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 "Inferior 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 "Inferior 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] '("Disassembiy" . 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-use-separate-io]
  '(menu-item "Separate inferior IO" gdb-use-separate-io-buffer
              :visible (eq gud-minor-mode 'gdba)
              :help "Toggle separate IO for inferior."
              :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 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))))
  (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)))
      (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))))))
  (when (markerp gdb-overlay-arrow-position)
    (move-marker gdb-overlay-arrow-position nil)
    (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)))
  (if (and (boundp 'speedbar-frame) (frame-live-p speedbar-frame))
      (speedbar-refresh))
  (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))))))

(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)))
      (if (member 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)
  (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)))))

\f
;;
;; 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-frame-address "main"))
            (progn
              (goto-char (point-min))
              (if (and gdb-frame-address
                       (search-forward gdb-frame-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) (current-buffer))))))
        ;; 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)
        (if (looking-at "[^\t].*?breakpoint")
            (progn
              (looking-at
            "\\([0-9]+\\)\\s-+\\S-+\\s-+\\S-+\\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-frame-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)))

(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-frame-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-frame-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-frame-address '(nil "main")) nil "0x")
                           gdb-frame-address "\n")
                   'gdb-assembler-handler))
            (push 'gdb-invalidate-assembler gdb-pending-triggers)
            (setq gdb-previous-frame-address gdb-frame-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))
  (if (re-search-forward  "Stack level \\([0-9]+\\)" nil t)
      (setq gdb-frame-number (match-string 1)))
  (goto-char (point-min))
  (when (re-search-forward ".*=\\s-+0x0*\\(\\S-*\\)\\s-+in\\s-+\\(\\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-frame-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 (buffer-name buffer) (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))

\f
;; 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))))))

; Uses "-var-list-children --all-values".  Needs GDB 6.1 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 5)
                                      (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)))))

; 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
        (if (string-equal (match-string 3) "false")
            (setcar (nthcdr 5 var) 'out-of-scope)
          (setcar (nthcdr 5 var) 'changed)
          (setcar (nthcdr 4 var)
                  (read (match-string 2)))))))
  (setq gdb-pending-triggers
   (delq 'gdb-var-update gdb-pending-triggers))
  (when (and (boundp 'speedbar-frame) (frame-live-p speedbar-frame))
    ;; dummy command to update speedbar at right time
    (gdb-enqueue-input (list "server pwd\n" 'gdb-speedbar-refresh))
    ;; keep gdb-pending-triggers non-nil till end
    (push 'gdb-speedbar-refresh gdb-pending-triggers)))

;; 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)
            (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)))
\f

;; 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)))
    (define-key map [mouse-2] 'gud-watch)
    map)
 "Keymap to create watch expression of a complex data type local variable.")

;; 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))
  (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))
                   (erase-buffer)
                   (dolist (local locals-list)
                     (setq name (car local))
                     (if (or (not (nth 2 local))
                             (string-match "\\0x" (nth 2 local)))
                       (add-text-properties 0 (length name)
                            `(mouse-face highlight
                              help-echo "mouse-2: create watch expression"
                              local-map ,gdb-locals-watch-map-1)
                            name))
                       (insert
                        (concat name "\t" (nth 1 local)
                                "\t" (nth 2 local) "\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