* progmodes/gud.el (gud-stop-subjob, gud-menu-map): Respect GDB

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

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

;; Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.

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

;; This file is part of GNU Emacs.

;; Homepage: http://www.emacswiki.org/emacs/GDB-MI

;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, 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.  If not, see <http://www.gnu.org/licenses/>.

;;; Credits:

;; This file was written by by Nick Roberts following the general design
;; used in gdb-ui.el for Emacs 22.1 - 23.1.  It is currently being developed
;; by Dmitry Dzhus <dima@sphinx.net.ru> as part of the Google Summer
;; of Code 2009 Project "Emacs GDB/MI migration".

;;; 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 and displays
;; expressions and their current values in their own buffers.  It also uses
;; features of Emacs 21 such as the fringe/display margin for breakpoints, and
;; the toolbar (see the GDB Graphical Interface section in the Emacs info
;; manual).

;; M-x gdb will start the debugger.

;; This file uses GDB/MI as the primary interface to GDB.  It is still under
;; development and is part of a process to migrate Emacs from annotations (as
;; used in gdb-ui.el) to GDB/MI.  It runs gdb with GDB/MI (-interp=mi) and
;; access CLI using "-interpreter-exec console cli-command".  This code works
;; without gdb-ui.el and uses MI tokens instead of queues. Eventually MI
;; should be asynchronous.

;; This mode will PARTLY WORK WITH RECENT GDB RELEASES (status in modeline
;; doesn't update properly when execution commands are issued from GUD buffer)
;; and WORKS BEST when GDB runs asynchronously: maint set linux-async on.
;;
;; You need development version of GDB 7.0 for the thread buffer to work.

;; This file replaces gdb-ui.el and is for development with GDB.  Use the
;; release branch of Emacs 22 for the latest version of gdb-ui.el.

;; Windows Platforms:

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

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

;; and compiling with -DUNBUFFERED while debugging.

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

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

;;; Mac OSX:

;; GDB in Emacs on Mac OSX works best with FSF GDB as Apple have made
;; some changes to the version that they include as part of Mac OSX.
;; This requires GDB version 7.0 or later (estimated release date Aug 2009)
;; as earlier versions don not compile on Mac OSX.

;;; Known Bugs:

;; 1) Stack buffer doesn't parse MI output if you stop in a routine without
;;    line information, e.g., a routine in libc (just a TODO item).

;; TODO:
;; 2) Watch windows to work with threads.
;; 3) Use treebuffer.el instead of the speedbar for watch-expressions?
;; 4) Mark breakpoint locations on scroll-bar of source buffer?

;;; Code:

(require 'gud)
(require 'json)
(require 'bindat)

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

(defvar gdb-memory-address "main")
(defvar gdb-memory-last-address nil
  "Last successfully accessed memory address.")
(defvar gdb-memory-next-page nil
  "Address of next memory page for program memory buffer.")
(defvar gdb-memory-prev-page nil
  "Address of previous memory page for program memory buffer.")

(defvar gdb-frame-number "0")
(defvar gdb-thread-number nil
  "Main current thread.

Invalidation triggers use this variable to query GDB for
information on the specified thread by wrapping GDB/MI commands
in `gdb-current-context-command'.

This variable may be updated implicitly by GDB via `gdb-stopped'
or explicitly by `gdb-select-thread'.

Only `gdb-setq-thread-number' should be used to change this
value.")

;; Used to show overlay arrow in source buffer. All set in
;; gdb-get-main-selected-frame. Disassembly buffer should not use
;; these but rely on buffer-local thread information instead.
(defvar gdb-selected-frame nil
  "Name of selected function for main current thread.")
(defvar gdb-selected-file nil
  "Name of selected file for main current thread.")
(defvar gdb-selected-line nil
  "Number of selected line for main current thread.")

(defvar gdb-threads-list nil
  "Associative list of threads provided by \"-thread-info\" MI command.

Keys are thread numbers (in strings) and values are structures as
returned from -thread-info by `gdb-json-partial-output'. Updated in
`gdb-thread-list-handler-custom'.")

(defvar gdb-running-threads-count nil
  "Number of currently running threads.

Nil means that no information is available.

Updated in `gdb-thread-list-handler-custom'.")

(defvar gdb-stopped-threads-count nil
  "Number of currently stopped threads.

See also `gdb-running-threads-count'.")

(defvar gdb-breakpoints-list nil
  "Associative list of breakpoints provided by \"-break-list\" MI command.

Keys are breakpoint numbers (in string) and values are structures
as returned from \"-break-list\" by `gdb-json-partial-output'
\(\"body\" field is used). Updated in
`gdb-breakpoints-list-handler-custom'.")

(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-main-file nil "Source file from which program execution begins.")
(defvar gdb-overlay-arrow-position nil)
(defvar gdb-stack-position nil)

(defvar gdb-location-alist nil
  "Alist of breakpoint numbers and full filenames.  Only used for files that
Emacs can't find.")
(defvar gdb-active-process nil
  "GUD tooltips display variable values when t, and macro definitions otherwise.")
(defvar gdb-error "Non-nil when GDB is reporting an error.")
(defvar gdb-macro-info nil
  "Non-nil if GDB knows that the inferior includes preprocessor macro info.")
(defvar gdb-register-names nil "List of register names.")
(defvar gdb-changed-registers nil
  "List of changed register numbers (strings).")
(defvar gdb-buffer-fringe-width nil)
(defvar gdb-last-command nil)
(defvar gdb-prompt-name nil)
(defvar gdb-token-number 0)
(defvar gdb-handler-alist '())
(defvar gdb-handler-number nil)
(defvar gdb-source-file-list nil
  "List of source files for the current executable.")
(defvar gdb-first-done-or-error t)
(defvar gdb-source-window nil)
(defvar gdb-inferior-status nil)
(defvar gdb-continuation nil)
(defvar gdb-filter-output nil
  "Message to be shown in GUD console.

This variable is updated in `gdb-done-or-error' and returned by
`gud-gdbmi-marker-filter'.")

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

(defvar gdb-output-sink 'nil
  "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.

    `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.")

(defvar gdb-pending-triggers '()
  "A list of trigger functions which have not yet been handled.

Elements are either function names or pairs (buffer . function)")

(defmacro gdb-add-pending (item)
  `(push ,item gdb-pending-triggers))
(defmacro gdb-pending-p (item)
  `(member ,item gdb-pending-triggers))
(defmacro gdb-delete-pending (item)
  `(setq gdb-pending-triggers
         (delete ,item gdb-pending-triggers)))

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

(defcustom gdb-non-stop t
  "When in non-stop mode, stopped threads can be examined while
other threads continue to execute."
  :type 'boolean
  :group 'gdb
  :version "23.2")

;; TODO Some commands can't be called with --all (give a notice about
;; it in setting doc)
(defcustom gdb-gud-control-all-threads t
  "When enabled, GUD execution commands affect all threads when
in non-stop mode. Otherwise, only currently selected thread is
affected."
  :type 'boolean
  :group 'gdb
  :version "23.2")

(defcustom gdb-switch-reasons t
  "List of stop reasons which cause Emacs to switch to the thread
which caused the stop. When t, switch to stopped thread no matter
what the reason was. When nil, never switch to stopped thread
automatically.

This setting is used in non-stop mode only. In all-stop mode,
Emacs always switches to the thread which caused the stop."
  ;; exited, exited-normally and exited-signalled are not
  ;; thread-specific stop reasons and therefore are not included in
  ;; this list
  :type '(choice
          (const :tag "All reasons" t)
          (set :tag "Selection of reasons..."
               (const :tag "A breakpoint was reached." "breakpoint-hit")
               (const :tag "A watchpoint was triggered." "watchpoint-trigger")
               (const :tag "A read watchpoint was triggered." "read-watchpoint-trigger")
               (const :tag "An access watchpoint was triggered." "access-watchpoint-trigger")
               (const :tag "Function finished execution." "function-finished")
               (const :tag "Location reached." "location-reached")
               (const :tag "Watchpoint has gone out of scope" "watchpoint-scope")
               (const :tag "End of stepping range reached." "end-stepping-range")
               (const :tag "Signal received (like interruption)." "signal-received"))
          (const :tag "None" nil))
  :group 'gdb
  :version "23.2"
  :link '(info-link "(gdb)GDB/MI Async Records"))

(defcustom gdb-stopped-hooks nil
  "This variable holds a list of functions to be called whenever
GDB stops.

Each function takes one argument, a parsed MI response, which
contains fields of corresponding MI *stopped async record:

    ((stopped-threads . \"all\")
     (thread-id . \"1\")
     (frame (line . \"38\")
            (fullname . \"/home/sphinx/projects/gsoc/server.c\")
            (file . \"server.c\")
            (args ((value . \"0x804b038\")
                   (name . \"arg\")))
            (func . \"hello\")
            (addr . \"0x0804869e\"))
     (reason . \"end-stepping-range\"))

`gdb-get-field' may be used to access the fields of response.

Each function is called after the new current thread was selected
and GDB buffers were updated in `gdb-stopped'."
  :type '(repeat function)
  :group 'gdb
  :version "23.2"
  :link '(info-link "(gdb)GDB/MI Async Records"))

(defcustom gdb-switch-when-another-stopped t
  "When nil, Emacs won't switch to stopped thread if some other
stopped thread is already selected."
  :type 'boolean
  :group 'gdb
  :version "23.2")

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

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

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

 (defcustom gdb-create-source-file-list t
   "Non-nil means create a list of files from which the executable was built.
 Set this to nil if the GUD buffer displays \"initializing...\" in the mode
 line for a long time when starting, possibly because your executable was
 built from a large number of files.  This allows quicker initialization
 but means that these files are not automatically enabled for debugging,
 e.g., you won't be able to click in the fringe to set a breakpoint until
 execution has already stopped there."
   :type 'boolean
   :group 'gdb
   :version "23.1")

(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 'gdb
  :version "22.1")

; Note: This mode requires a separate buffer for inferior IO.
(defconst gdb-use-separate-io-buffer t)

(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-enable-debug (arg)
  "Toggle logging of transaction between Emacs and Gdb.
The log is stored in `gdb-debug-log' as an alist with elements
whose cons is send, send-item or recv and whose cdr is the string
being transferred.  This list may grow up to a size of
`gdb-debug-log-max' after which the oldest element (at the end of
the list) is deleted every time a new one is added (at the front)."
  (interactive "P")
  (setq gdb-enable-debug
        (if (null arg)
            (not gdb-enable-debug)
          (> (prefix-numeric-value arg) 0)))
  (message (format "Logging of transaction %sabled"
                   (if gdb-enable-debug "en" "dis"))))

(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)))

(defvar gdb-locals-font-lock-keywords
  '(
    ;; 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'.")

;; noall is used for commands which don't take --all, but only
;; --thread.
(defun gdb-gud-context-command (command &optional noall)
  "When `gdb-non-stop' is t, add --thread option to COMMAND if
`gdb-gud-control-all-threads' is nil and --all option otherwise.
If NOALL is t, always add --thread option no matter what
`gdb-gud-control-all-threads' value is.

When `gdb-non-stop' is nil, return COMMAND unchanged."
  (if gdb-non-stop
      (if (and gdb-gud-control-all-threads
               (not noall))
          (concat command " --all ")
        (gdb-current-context-command command))
    command))

;; TODO Document this. We use noarg when not in gud-def
(defmacro gdb-gud-context-call (cmd1 &optional cmd2 noall noarg)
  `(gud-call
    (concat
     (gdb-gud-context-command ,cmd1 ,noall)
     ,cmd2) ,(when (not noarg) 'arg)))

;;;###autoload
(defun gdb (command-line)
  "Run gdb on program FILE in buffer *gud-FILE*.
The directory containing FILE becomes the initial working directory
and source-file directory for your debugger.

If `gdb-many-windows' is nil (the default value) then gdb just
pops up the GUD buffer unless `gdb-show-main' is t.  In this case
it starts with two windows: one displaying the GUD buffer and the
other with the source file with the main routine of the inferior.

If `gdb-many-windows' is t, regardless of the value of
`gdb-show-main', the layout below will appear.  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 'gdb)))

  (when (and gud-comint-buffer
           (buffer-name gud-comint-buffer)
           (get-buffer-process gud-comint-buffer)
           (with-current-buffer gud-comint-buffer (eq gud-minor-mode 'gdba)))
        (gdb-restore-windows)
        (error
         "Multiple debugging requires restarting in text command mode"))
  ;;
  (gud-common-init command-line nil 'gud-gdbmi-marker-filter)
  (set (make-local-variable 'gud-minor-mode) 'gdbmi)
  (setq comint-input-sender 'gdb-send)

  (gud-def gud-tbreak "tbreak %f:%l" "\C-t"
           "Set temporary breakpoint at current line.")
  (gud-def gud-jump
           (progn (gud-call "tbreak %f:%l") (gud-call "jump %f:%l"))
           "\C-j" "Set execution address to current line.")

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

  (gud-def gud-step   (gdb-gud-context-call "-exec-step" "%p" t)
           "\C-s"
           "Step one source line with display.")
  (gud-def gud-stepi  (gdb-gud-context-call "-exec-step-instruction" "%p" t)
           "\C-i"
           "Step one instruction with display.")
  (gud-def gud-next   (gdb-gud-context-call "-exec-next" "%p" t)
           "\C-n"
           "Step one line (skip functions).")
  (gud-def gud-nexti  (gdb-gud-context-call "-exec-next-instruction" "%p" t)
           nil
           "Step one instruction (skip functions).")
  (gud-def gud-cont   (gdb-gud-context-call "-exec-continue")
           "\C-r"
           "Continue with display.")
  (gud-def gud-finish (gdb-gud-context-call "-exec-finish" nil t)
           "\C-f"
           "Finish executing current function.")
  (gud-def gud-run    "-exec-run"
           nil
           "Run the program.")

  (gud-def gud-break (if (not (string-match "Disassembly" 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 "Disassembly" 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.")

  ;; -exec-until doesn't support --all yet
  (gud-def gud-until  (if (not (string-match "Disassembly" mode-name))
                          (gud-call "-exec-until %f:%l" arg)
                        (save-excursion
                          (beginning-of-line)
                          (forward-char 2)
                          (gud-call "-exec-until *%a" arg)))
           "\C-u" "Continue to current line or address.")
  ;; TODO Why arg here?
  (gud-def
   gud-go (gud-call (if gdb-active-process
                        (gdb-gud-context-command "-exec-continue")
                      "-exec-run") arg)
   nil "Start or continue execution.")

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

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

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

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

  (local-set-key "\C-i" 'gud-gdb-complete-command)
  (setq gdb-first-prompt t)
  (setq gud-running nil)
  (gdb-update)
  (run-hooks 'gdb-mode-hook))
            
(defun gdb-init-1 ()
  ;; (re-)initialise
  (setq gdb-selected-frame nil
        gdb-frame-number nil
        gdb-var-list nil
        gdb-pending-triggers nil
        gdb-output-sink 'user
        gdb-location-alist nil
        gdb-source-file-list nil
        gdb-last-command nil
        gdb-token-number 0
        gdb-handler-alist '()
        gdb-handler-number nil
        gdb-prompt-name nil
        gdb-first-done-or-error t
        gdb-buffer-fringe-width (car (window-fringes))
        gdb-debug-log nil
        gdb-source-window nil
        gdb-inferior-status nil
        gdb-continuation nil
        gdb-buf-publisher '()
        gdb-threads-list '()
        gdb-breakpoints-list '())
  ;;
  (setq gdb-buffer-type 'gdbmi)
  ;;
  (gdb-force-mode-line-update
   (propertize "initializing..." 'face font-lock-variable-name-face))
  (when gdb-use-separate-io-buffer
    (gdb-get-buffer-create 'gdb-inferior-io)
    (gdb-clear-inferior-io)
    (set-process-filter (get-process "gdb-inferior") 'gdb-inferior-filter)
    (gdb-input
     ;; Needs GDB 6.4 onwards
     (list (concat "-inferior-tty-set "
                   (process-tty-name (get-process "gdb-inferior")))
           'ignore)))
  (if (eq window-system 'w32)
      (gdb-input (list "-gdb-set new-console off" 'ignore)))
  (gdb-input (list "-gdb-set height 0" 'ignore))

  (when gdb-non-stop
    (gdb-input (list "-gdb-set non-stop 1" 'ignore))
    (gdb-input (list "-gdb-set target-async 1" 'ignore)))

  ;; find source file and compilation directory here
  (gdb-input
   ; Needs GDB 6.2 onwards.
   (list "-file-list-exec-source-files" 'gdb-get-source-file-list))
  (if gdb-create-source-file-list
      (gdb-input
        ; Needs GDB 6.0 onwards.
       (list "-file-list-exec-source-file" 'gdb-get-source-file)))
  (gdb-input
   (list "-gdb-show prompt" 'gdb-get-prompt)))

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

(defun gdb-create-define-alist ()
  "Create an alist of #define directives for GUD tooltips."
  (let* ((file (buffer-file-name))
         (output
          (with-output-to-string
            (with-current-buffer standard-output
              (and file
                   (file-exists-p file)
                   ;; call-process doesn't work with remote file names.
                   (not (file-remote-p default-directory))
                   (call-process shell-file-name file
                                 (list t nil) nil "-c"
                                 (concat gdb-cpp-define-alist-program " "
                                         gdb-cpp-define-alist-flags))))))
        (define-list (split-string output "\n" t))
        (name))
    (setq gdb-define-alist nil)
    (dolist (define define-list)
      (setq name (nth 1 (split-string define "[( ]")))
      (push (cons name define) gdb-define-alist))))

(declare-function tooltip-show "tooltip" (text &optional use-echo-area))
(defvar tooltip-use-echo-area)

(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
       (not (display-graphic-p)))))
 
;; 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-input
           (list  (concat "print " expr)
                  `(lambda () (gdb-tooltip-print ,expr))))))))

(defun gdb-init-buffer ()
  (set (make-local-variable 'gud-minor-mode) 'gdbmi)
  (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)))

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

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

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

(defcustom gdb-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 'gdb
  :version "22.1")

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

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

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

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

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

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

(declare-function tooltip-identifier-from-point "tooltip" (point))

(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 (eq minor-mode 'gdbmi)
        (progn
          (if event (posn-set-point (event-end event)))
          (require 'tooltip)
          (save-selected-window
            (let ((expr
                   (if arg
                       (completing-read "Name of variable: "
                                        'gud-gdb-complete-command)
                     (if (and transient-mark-mode mark-active)
                         (buffer-substring (region-beginning) (region-end))
                       (concat (if (eq major-mode 'gdb-registers-mode) "$")
                               (tooltip-identifier-from-point (point)))))))
              (set-text-properties 0 (length expr) nil expr)
              (gdb-input
               (list (concat"-var-create - * "  expr "")
                     `(lambda () (gdb-var-create-handler ,expr)))))))
      (message "gud-watch is a no-op in this mode."))))

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

(defun gdb-var-create-handler (expr)
  (goto-char (point-min))
  (if (re-search-forward gdb-var-create-regexp nil t)
      (let ((var (list
                  (match-string 1)
                  (if (and (string-equal gdb-current-language "c")
                           gdb-use-colon-colon-notation gdb-selected-frame)
                      (setq expr (concat gdb-selected-frame "::" expr))
                    expr)
                  (match-string 2)
                  (match-string 4)
                  (if (match-string 3) (read (match-string 3)))
                  nil)))
        (push var gdb-var-list)
        (speedbar 1)
        (unless (string-equal
                 speedbar-initial-expansion-list-name "GUD")
          (speedbar-change-initial-expansion-list "GUD"))
        (gdb-input
         (list
          (concat "-var-evaluate-expression " (car var))
          `(lambda () (gdb-var-evaluate-expression-handler
                       ,(car var) nil)))))
    (message-box "No symbol \"%s\" in current context." expr)))

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

(defun gdb-speedbar-timer-fn ()
  (if gdb-speedbar-auto-raise
      (raise-frame speedbar-frame))
  (gdb-delete-pending 'gdb-speedbar-timer)
  (speedbar-timer-fn))

(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)))))
  (gdb-speedbar-update))

; Uses "-var-list-children --all-values".  Needs GDB 6.1 onwards.
(defun gdb-var-list-children (varnum)
  (gdb-input
   (list (concat "-var-update " varnum) 'ignore))
  (gdb-input
   (list (concat "-var-list-children --all-values "
                varnum)
             `(lambda () (gdb-var-list-children-handler ,varnum)))))

(defconst gdb-var-list-children-regexp
  "child={.*?name=\"\\(.+?\\)\".*?,exp=\"\\(.+?\\)\".*?,\
numchild=\"\\(.+?\\)\".*?,value=\\(\".*?\"\\).*?,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 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))))
  (gdb-speedbar-update))

(defun gdb-var-set-format (format)
  "Set the output format for a variable displayed in the speedbar."
  (let* ((var (nth (- (count-lines (point-min) (point)) 2) gdb-var-list))
         (varnum (car var)))
    (gdb-input
     (list (concat "-var-set-format " varnum " " format) 'ignore))
    (gdb-var-update)))

(defun gdb-var-delete-1 (varnum)
  (gdb-input
   (list (concat "-var-delete " varnum) 'ignore))
  (setq gdb-var-list (delq var gdb-var-list))
  (dolist (varchild gdb-var-list)
    (if (string-match (concat (car var) "\\.") (car varchild))
        (setq gdb-var-list (delq varchild gdb-var-list)))))

(defun gdb-var-delete ()
  "Delete watch expression at point from the speedbar."
  (interactive)
  (let ((text (speedbar-line-text)))
    (string-match "\\(\\S-+\\)" text)
       (let* ((var (nth (- (count-lines (point-min) (point)) 2) gdb-var-list))
              (varnum (car var)))
         (if (string-match "\\." (car var))
             (message-box "Can only delete a root expression")
           (gdb-var-delete-1 varnum)))))

(defun gdb-var-delete-children (varnum)
  "Delete children of variable object at point from the speedbar."
  (gdb-input
   (list (concat "-var-delete -c " varnum) 'ignore)))

(defun gdb-edit-value (text token indent)
  "Assign a value to a variable displayed in the speedbar."
  (let* ((var (nth (- (count-lines (point-min) (point)) 2) gdb-var-list))
         (varnum (car var)) (value))
    (setq value (read-string "New value: "))
    (gdb-input
     (list (concat "-var-assign " varnum " " value)
           `(lambda () (gdb-edit-value-handler ,value))))))

(defconst gdb-error-regexp "\\^error,msg=\\(\".+\"\\)")

(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)))

; Uses "-var-update --all-values".  Needs GDB 6.4 onwards.
(defun gdb-var-update ()
  (if (not (gdb-pending-p 'gdb-var-update))
      (gdb-input
       (list "-var-update --all-values *" 'gdb-var-update-handler)))
  (gdb-add-pending 'gdb-var-update))

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

(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))
           (var (assoc varnum gdb-var-list)))
      (when var
        (let ((match (match-string 3)))
          (cond ((string-equal match "false")
                 (if gdb-delete-out-of-scope
                     (gdb-var-delete-1 varnum)
                   (setcar (nthcdr 5 var) 'out-of-scope)))
                ((string-equal match "true")
                 (setcar (nthcdr 5 var) 'changed)
                 (setcar (nthcdr 4 var)
                         (read (match-string 2))))
                ((string-equal match "invalid")
                 (gdb-var-delete-1 varnum)))))))
  (gdb-delete-pending 'gdb-var-update)
  (gdb-speedbar-update))

(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
         (let* ((var (assoc token gdb-var-list))
                (expr (nth 1 var)) (children (nth 2 var)))
           (if (or (<= (string-to-number children) gdb-max-children)
                   (y-or-n-p
                    (format "%s has %s children. Continue? " expr children)))
               (gdb-var-list-children token))))
        ((string-match "-" text)        ;contract this node
         (dolist (var gdb-var-list)
           (if (string-match (concat token "\\.") (car var))
               (setq gdb-var-list (delq var gdb-var-list))))
         (gdb-var-delete-children token)
         (speedbar-change-expand-button-char ?+)
         (speedbar-delete-subblock indent))
        (t (error "Ooops...  not sure what to do")))
  (speedbar-center-buffer-smartly))

(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 `gdbmi' 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

(defvar gdb-buffer-rules '())

(defun gdb-rules-name-maker (rules-entry)
  (cadr rules-entry))
(defun gdb-rules-buffer-mode (rules-entry)
  (nth 2 rules-entry))
(defun gdb-rules-update-trigger (rules-entry)
  (nth 3 rules-entry))

(defun gdb-update-buffer-name ()
  (let ((f (gdb-rules-name-maker (assoc gdb-buffer-type
                                        gdb-buffer-rules))))
    (when f (rename-buffer (funcall f)))))

(defun gdb-current-buffer-rules ()
  "Get `gdb-buffer-rules' entry for current buffer type."
  (assoc gdb-buffer-type gdb-buffer-rules))

(defun gdb-current-buffer-thread ()
  "Get thread object of current buffer from `gdb-threads-list'.

When current buffer is not bound to any thread, return main
thread."
  (cdr (assoc gdb-thread-number gdb-threads-list)))

(defun gdb-current-buffer-frame ()
  "Get current stack frame object for thread of current buffer."
  (gdb-get-field (gdb-current-buffer-thread) 'frame))

(defun gdb-get-buffer (key &optional thread)
  "Get a specific GDB buffer.

In that buffer, `gdb-buffer-type' must be equal to KEY and
`gdb-thread-number' (if provided) must be equal to THREAD."
  (catch 'found
    (dolist (buffer (buffer-list) nil)
      (with-current-buffer buffer
        (when (and (eq gdb-buffer-type key)
                   (or (not thread)
                       (equal gdb-thread-number thread)))
          (throw 'found buffer))))))

(defun gdb-get-buffer-create (key &optional thread)
  "Create a new GDB buffer of the type specified by KEY.
The key should be one of the cars in `gdb-buffer-rules'.

If THREAD is non-nil, it is assigned to `gdb-thread-number'
buffer-local variable of the new buffer.

If buffer's mode returns a symbol, it's used to register "
  (or (gdb-get-buffer key thread)
      (let ((rules (assoc key gdb-buffer-rules))
             (new (generate-new-buffer "limbo")))
        (with-current-buffer new
          (let ((mode (gdb-rules-buffer-mode rules))
                (trigger (gdb-rules-update-trigger rules)))
            (when mode (funcall mode))
            (setq gdb-buffer-type key)
            (when thread
              (set (make-local-variable 'gdb-thread-number) thread))
            (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)
            (rename-buffer (funcall (gdb-rules-name-maker rules)))
            (when trigger
              (gdb-add-subscriber gdb-buf-publisher
                                  (cons (current-buffer)
                                        (gdb-bind-function-to-buffer trigger (current-buffer))))
              (funcall trigger))
            (current-buffer))))))

(defun gdb-bind-function-to-buffer (expr buffer)
  "Return a function which will evaluate EXPR in BUFFER."
  `(lambda (&rest args)
     (with-current-buffer ,buffer
       (apply ',expr args))))

;; Used to define all gdb-frame-*-buffer functions except
;; `gdb-frame-separate-io-buffer'
(defmacro def-gdb-frame-for-buffer (name buffer &optional doc)
  "Define a function NAME which shows gdb BUFFER in a separate frame.

DOC is an optional documentation string."
  `(defun ,name (&optional thread)
     ,(when doc doc)
     (interactive)
     (let ((special-display-regexps (append special-display-regexps '(".*")))
           (special-display-frame-alist gdb-frame-parameters))
       (display-buffer (gdb-get-buffer-create ,buffer thread)))))

(defmacro def-gdb-display-buffer (name buffer &optional doc)
  "Define a function NAME which shows gdb BUFFER.

DOC is an optional documentation string."
  `(defun ,name (&optional thread)
     ,(when doc doc)
     (interactive)
     (gdb-display-buffer
      (gdb-get-buffer-create ,buffer thread) t)))

;; 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)))
    (if binding
        (setcdr binding rules)
      (push (cons buffer-type rules)
            gdb-buffer-rules))))

(defun gdb-parent-mode ()
  "Generic mode to derive all other GDB buffer modes from."
  (kill-all-local-variables)
  (setq buffer-read-only t)
  (buffer-disable-undo)
  ;; Delete buffer from gdb-buf-publisher when it's killed
  ;; (if it has an associated update trigger)
  (add-hook 
   'kill-buffer-hook
   (function
    (lambda ()
      (let ((trigger (gdb-rules-update-trigger
                      (gdb-current-buffer-rules))))
        (when trigger
          (gdb-delete-subscriber 
           gdb-buf-publisher
           ;; This should match gdb-add-subscriber done in
           ;; gdb-get-buffer-create
           (cons (current-buffer)
                 (gdb-bind-function-to-buffer trigger (current-buffer))))))))
   nil t))

;; GUD buffers are an exception to the rules
(gdb-set-buffer-rules 'gdbmi '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) t)))

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

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

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

(define-derived-mode gdb-inferior-io-mode comint-mode "Inferior I/O"
  "Major mode for gdb inferior-io."
  :syntax-table nil :abbrev-table nil
  ;; We want to use comint because it has various nifty and familiar
  ;; features.  We don't need a process, but comint wants one, so create
  ;; a dummy one.
  (make-comint-in-buffer
   "gdb-inferior" (current-buffer) "sleep" nil "1000000000"))

(defun gdb-inferior-filter (proc string)
  (unless (string-equal string "")
    (gdb-display-buffer (gdb-get-buffer-create 'gdb-inferior-io) t))
  (with-current-buffer (gdb-get-buffer-create 'gdb-inferior-io)
    (insert-before-markers string)))

(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)))

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

(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.")

(declare-function define-fringe-bitmap "fringe.c"
                  (bitmap bits &optional height width align))

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

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

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

\f
(defun gdb-send (proc string)
  "A comint send filter for gdb."
  (with-current-buffer gud-comint-buffer
    (let ((inhibit-read-only t))
      (remove-text-properties (point-min) (point-max) '(face))))
  ;; mimic <RET> key to repeat previous command in GDB
  (if (not (string= "" string))
      (setq gdb-last-command string)
    (if gdb-last-command (setq string gdb-last-command)))
  (if gdb-enable-debug
      (push (cons 'mi-send (concat string "\n")) gdb-debug-log))
  (if (string-match "^-" string)
      ;; MI command
      (progn
        (setq gdb-first-done-or-error t)
        (process-send-string proc (concat string "\n")))
    ;; CLI command
    (if (string-match "\\\\$" string)
        (setq gdb-continuation (concat gdb-continuation string "\n"))
      (setq gdb-first-done-or-error t)
      (process-send-string proc (concat "-interpreter-exec console \""
                                        gdb-continuation string "\"\n"))
      (setq gdb-continuation nil))))

(defun gdb-input (item)
  (if gdb-enable-debug (push (cons 'send-item item) gdb-debug-log))
  (setq gdb-token-number (1+ gdb-token-number))
  (setcar item (concat (number-to-string gdb-token-number) (car item)))
  (push (cons gdb-token-number (car (cdr item))) gdb-handler-alist)
  (process-send-string (get-buffer-process gud-comint-buffer)
                       (concat (car item) "\n")))

(defun gdb-current-context-command (command)
  "Add --thread option to gdb COMMAND.

Option value is taken from `gdb-thread-number'. If
`gdb-thread-number' is nil, COMMAND is returned unchanged."
  (if gdb-thread-number
      (concat command " --thread " gdb-thread-number " ")
    command))

(defun gdb-current-context-buffer-name (name)
  "Add thread information and asterisks to string NAME."
  (concat "*" name
          (if (local-variable-p 'gdb-thread-number) 
              " (bound to thread "
            " (current thread ")
          gdb-thread-number ")*"))
\f

(defcustom gud-gdb-command-name "gdb -i=mi"
  "Default command to execute an executable under the GDB debugger."
  :type 'string
  :group 'gdb)

(defun gdb-resync()
  (setq gud-running nil)
  (setq gdb-output-sink 'user)
  (setq gdb-pending-triggers nil))

;; Publish-subscribe

(defmacro gdb-add-subscriber (publisher subscriber)
  "Register new PUBLISHER's SUBSCRIBER.

SUBSCRIBER must be a pair, where cdr is a function of one
argument (see `gdb-emit-signal')."
  `(add-to-list ',publisher ,subscriber t))

(defmacro gdb-delete-subscriber (publisher subscriber)
  "Unregister SUBSCRIBER from PUBLISHER."
  `(setq ,publisher (delete ,subscriber
                            ,publisher)))

(defun gdb-get-subscribers (publisher)
  publisher)

(defun gdb-emit-signal (publisher &optional signal)
  "Call cdr for each subscriber of PUBLISHER with SIGNAL as argument."
  (dolist (subscriber (gdb-get-subscribers publisher))
    (funcall (cdr subscriber) signal)))

(defvar gdb-buf-publisher '() 
  "Used to invalidate GDB buffers by emitting a signal in
`gdb-update'.

Must be a list of pairs with cars being buffers and cdr's being
valid signal handlers.")

(defun gdb-update ()
  "Update buffers showing status of debug session."
  (when gdb-first-prompt
    (gdb-force-mode-line-update
     (propertize "initializing..." 'face font-lock-variable-name-face))
    (gdb-init-1)
    (setq gdb-first-prompt nil))
  ;; We may need to update gdb-threads-list so we can use
  (gdb-get-buffer-create 'gdb-threads-buffer)
  ;; gdb-break-list is maintained in breakpoints handler
  (gdb-get-buffer-create 'gdb-breakpoints-buffer)  
  
  (gdb-emit-signal gdb-buf-publisher 'update)

  (gdb-get-main-selected-frame)

  (gdb-get-changed-registers)

  (when (and (boundp 'speedbar-frame) (frame-live-p speedbar-frame))
    (dolist (var gdb-var-list)
      (setcar (nthcdr 5 var) nil))
    (gdb-var-update)))

;; gdb-setq-thread-number and gdb-update-gud-running are decoupled
;; because we may need to update current gud-running value without
;; changing current thread (see gdb-running)
(defun gdb-setq-thread-number (number)
  "Set `gdb-thread-number' to NUMBER and update `gud-running'."
  (setq gdb-thread-number number)
  (gdb-update-gud-running))

(defun gdb-update-gud-running ()
  "Set `gud-running' according to the state of current thread.

Note that when `gdb-gud-control-all-threads' is t, `gud-running'
cannot be reliably used to determine whether or not execution
control buttons should be shown in menu or toolbar. Use
`gdb-running-threads-count' and `gdb-stopped-threads-count'
instead.

For all-stop mode, thread information is unavailable while target is running"
  (setq gud-running
        (string= (gdb-get-field (gdb-current-buffer-thread) 'state)
                 "running")))

;; 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 gdb-car< (a b)
  (< (car a) (car b)))

(defvar gdbmi-record-list
  '((gdb-gdb . "(gdb) \n")
    (gdb-done . "\\([0-9]*\\)\\^done,?\\(.*?\\)\n")
    (gdb-starting . "\\([0-9]*\\)\\^running\n")
    (gdb-error . "\\([0-9]*\\)\\^error,\\(.*?\\)\n")
    (gdb-console . "~\\(\".*?\"\\)\n")
    (gdb-internals . "&\\(\".*?\"\\)\n")
    (gdb-stopped . "\\*stopped,?\\(.*?\\)\n")
    (gdb-running . "\\*running,\\(.*?\n\\)")
    (gdb-thread-created . "=thread-created,\\(.*?\n\\)")
    (gdb-thread-exited . "=thread-exited,\\(.*?\n\\)")))

(defun gud-gdbmi-marker-filter (string)
  "Filter GDB/MI output."

  ;; Record transactions if logging is enabled.
  (when gdb-enable-debug
    (push (cons 'recv string) gdb-debug-log)
    (if (and gdb-debug-log-max
             (> (length gdb-debug-log) gdb-debug-log-max))
        (setcdr (nthcdr (1- gdb-debug-log-max) gdb-debug-log) nil)))

  ;; Recall the left over gud-marker-acc from last time
  (setq gud-marker-acc (concat gud-marker-acc string))

  ;; Start accumulating output for the GUD buffer
  (setq gdb-filter-output "")
  (let ((output-record) (output-record-list))

    ;; Process all the complete markers in this chunk.
    (dolist (gdbmi-record gdbmi-record-list)
      (while (string-match (cdr gdbmi-record) gud-marker-acc)
        (push (list (match-beginning 0)
                    (car gdbmi-record)
                    (match-string 1 gud-marker-acc)
                    (match-string 2 gud-marker-acc)
                    (match-end 0))
              output-record-list)
        (setq gud-marker-acc
              (concat (substring gud-marker-acc 0 (match-beginning 0))
                      ;; Pad with spaces to preserve position.
                      (make-string (length (match-string 0 gud-marker-acc)) 32)
                      (substring gud-marker-acc (match-end 0))))))

    (setq output-record-list (sort output-record-list 'gdb-car<))

    (dolist (output-record output-record-list)
      (let ((record-type (cadr output-record))
            (arg1 (nth 2 output-record))
            (arg2 (nth 3 output-record)))
        (if (eq record-type 'gdb-error)
            (gdb-done-or-error arg2 arg1 'error)
          (if (eq record-type 'gdb-done)
              (gdb-done-or-error arg2 arg1 'done)
            ;; Suppress "No registers." since GDB 6.8 and earlier duplicates MI
            ;; error message on internal stream.  Don't print to GUD buffer.
            (unless (and (eq record-type 'gdb-internals)
                     (string-equal (read arg1) "No registers.\n"))
              (funcall record-type arg1))))))

    (setq gdb-output-sink 'user)
    ;; Remove padding.
    (string-match "^ *" gud-marker-acc)
    (setq gud-marker-acc (substring gud-marker-acc (match-end 0)))

    gdb-filter-output))

(defun gdb-gdb (output-field))

;; gdb-invalidate-threads is defined to accept 'update-threads signal
(defun gdb-thread-created (output-field))
(defun gdb-thread-exited (output-field)
  (gdb-emit-signal gdb-buf-publisher 'update-threads))

(defun gdb-running (output-field)
  (setq gdb-inferior-status "running")
  (gdb-force-mode-line-update
   (propertize gdb-inferior-status 'face font-lock-type-face))
  (when (not gdb-non-stop)
    (setq gud-running t))
  (setq gdb-active-process t)
  (gdb-emit-signal gdb-buf-publisher 'update-threads))

(defun gdb-starting (output-field)
  ;; CLI commands don't emit ^running at the moment so use gdb-running too.
  (gdb-input
   (list "-data-list-register-names" 'gdb-register-names-handler))
  (setq gdb-inferior-status "running")
  (gdb-force-mode-line-update
   (propertize gdb-inferior-status 'face font-lock-type-face))
  (setq gdb-active-process t)
  (when (not gdb-non-stop)
    (setq gud-running t)))

;; -break-insert -t didn't give a reason before gdb 6.9

(defun gdb-stopped (output-field)
  "Given the contents of *stopped MI async record, select new
current thread and update GDB buffers."
  ;; Reason is available with target-async only
  (let* ((result (gdb-json-string output-field))
         (reason (gdb-get-field result 'reason))
         (thread-id (gdb-get-field result 'thread-id)))

;;; Don't set gud-last-frame here as it's currently done in gdb-frame-handler
;;; because synchronous GDB doesn't give these fields with CLI.
;;;     (when file
;;;       (setq
;;;        ;; Extract the frame position from the marker.
;;;        gud-last-frame (cons file
;;;                         (string-to-number
;;;                          (match-string 6 gud-marker-acc)))))

    (setq gdb-inferior-status (or reason "unknown"))
    (gdb-force-mode-line-update
     (propertize gdb-inferior-status 'face font-lock-warning-face))
    (if (string-equal reason "exited-normally")
        (setq gdb-active-process nil))

    ;; Select new current thread.

    ;; Don't switch if we have no reasons selected
    (when gdb-switch-reasons
      ;; Switch from another stopped thread only if we have
      ;; gdb-switch-when-another-stopped:
      (when (or gdb-switch-when-another-stopped
                (not (string= "stopped"
                              (gdb-get-field (gdb-current-buffer-thread) 'state))))
        ;; Switch if current reason has been selected or we have no
        ;; reasons
        (if (or (eq gdb-switch-reasons t)
                (member reason gdb-switch-reasons))
            (progn
              (gdb-setq-thread-number thread-id)
              (message (concat "Switched to thread " thread-id)))
          (message (format "Thread %s stopped" thread-id)))))
    
  ;; Print "(gdb)" to GUD console
  (when gdb-first-done-or-error
    (setq gdb-filter-output (concat gdb-filter-output gdb-prompt-name)))

  ;; In non-stop, we update information as soon as another thread gets
  ;; stopped
  (when (or gdb-first-done-or-error
            gdb-non-stop)
    ;; In all-stop this updates gud-running properly as well.
    (gdb-update)
    (setq gdb-first-done-or-error nil))
  (run-hook-with-args 'gdb-stopped-hook result)))

;; Remove the trimmings from log stream containing debugging messages
;; being produced by GDB's internals, use warning face and send to GUD
;; buffer.
(defun gdb-internals (output-field)
  (setq gdb-filter-output
        (gdb-concat-output
         gdb-filter-output
         (let ((error-message
                (read output-field)))
           (put-text-property
            0 (length error-message)
            'face font-lock-warning-face
            error-message)
           error-message))))

;; Remove the trimmings from the console stream and send to GUD buffer
;; (frontend MI commands should not print to this stream)
(defun gdb-console (output-field)
   (setq gdb-filter-output
        (gdb-concat-output
         gdb-filter-output
         (read output-field))))

(defun gdb-done-or-error (output-field token-number type)
  (if (string-equal token-number "")
      ;; Output from command entered by user
      (progn
        (setq gdb-output-sink 'user)
        (setq token-number nil)
        ;; MI error - send to minibuffer
        (when (eq type 'error)
            ;; Skip "msg=" from `output-field'
            (message (read (substring output-field 4)))
            ;; Don't send to the console twice.  (If it is a console error
            ;; it is also in the console stream.)
            (setq output-field nil)))
    ;; Output from command from frontend.
    (setq gdb-output-sink 'emacs))

  (gdb-clear-partial-output)
  (when gdb-first-done-or-error
    (unless (or token-number gud-running)
      (setq gdb-filter-output (concat gdb-filter-output gdb-prompt-name)))
    (gdb-update)
    (setq gdb-first-done-or-error nil))

  (setq gdb-filter-output
        (gdb-concat-output gdb-filter-output output-field))

  (if token-number
      (progn
        (with-current-buffer
            (gdb-get-buffer-create 'gdb-partial-output-buffer)
          (funcall
           (cdr (assoc (string-to-number token-number) gdb-handler-alist))))
        (setq gdb-handler-alist
              (assq-delete-all token-number gdb-handler-alist)))))

(defun gdb-concat-output (so-far new)
  (let ((sink gdb-output-sink))
    (cond
     ((eq sink 'user) (concat so-far new))
     ((eq sink 'emacs)
      (gdb-append-to-partial-output new)
      so-far))))

(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-jsonify-buffer (&optional fix-key fix-list)
  "Prepare GDB/MI output in current buffer for parsing with `json-read'.

Field names are wrapped in double quotes and equal signs are
replaced with semicolons.

If FIX-KEY is non-nil, strip all \"FIX-KEY=\" occurences from
partial output. This is used to get rid of useless keys in lists
in MI messages, e.g.: [key=.., key=..]. -stack-list-frames and
-break-info are examples of MI commands which issue such
responses.

If FIX-LIST is non-nil, \"FIX-LIST={..}\" is replaced with
\"FIX-LIST=[..]\" prior to parsing. This is used to fix broken
-break-info output when it contains breakpoint script field
incompatible with GDB/MI output syntax."
  (save-excursion
    (goto-char (point-min))
    (when fix-key
      (save-excursion
        (while (re-search-forward (concat "[\\[,]\\(" fix-key "=\\)") nil t)
          (replace-match "" nil nil nil 1))))
    ;; Emacs bug #3794
    (when fix-list
      (save-excursion
        ;; Find positions of braces which enclose broken list
        (while (re-search-forward (concat fix-list "={\"") nil t)
          (let ((p1 (goto-char (- (point) 2)))
                (p2 (progn (forward-sexp)
                           (1- (point)))))
            ;; Replace braces with brackets
            (save-excursion
              (goto-char p1)
              (delete-char 1)
              (insert "[")
              (goto-char p2)
              (delete-char 1)
              (insert "]"))))))
    (goto-char (point-min))
    (insert "{")
    ;; TODO: This breaks badly with foo= inside constants
    (while (re-search-forward "\\([[:alpha:]-_]+\\)=" nil t)
      (replace-match "\"\\1\":" nil nil))
    (goto-char (point-max))
    (insert "}")))

(defun gdb-json-read-buffer (&optional fix-key fix-list)
  "Prepare and parse GDB/MI output in current buffer with `json-read'.

FIX-KEY and FIX-LIST work as in `gdb-jsonify-buffer'."
  (gdb-jsonify-buffer fix-key fix-list)
  (save-excursion
    (goto-char (point-min))
    (let ((json-array-type 'list))
      (json-read))))

(defun gdb-json-string (string &optional fix-key fix-list)
  "Prepare and parse STRING containing GDB/MI output with `json-read'.

FIX-KEY and FIX-LIST work as in `gdb-jsonify-buffer'."
  (with-temp-buffer
    (insert string)
    (gdb-json-read-buffer fix-key fix-list)))

(defun gdb-json-partial-output (&optional fix-key fix-list)
  "Prepare and parse gdb-partial-output-buffer with `json-read'.

FIX-KEY and FIX-KEY work as in `gdb-jsonify-buffer'."
  (with-current-buffer (gdb-get-buffer-create 'gdb-partial-output-buffer)
    (gdb-json-read-buffer fix-key fix-list)))

(defun gdb-pad-string (string padding)
  (format (concat "%" (number-to-string padding) "s") string))

(defalias 'gdb-get-field 'bindat-get-field)

(defun gdb-get-many-fields (struct &rest fields)
  "Return a list of FIELDS values from STRUCT."
  (let ((values))
    (dolist (field fields values)
      (setq values (append values (list (gdb-get-field struct field)))))))

(defmacro def-gdb-auto-update-trigger (trigger-name gdb-command
                                                    handler-name
                                                    &optional signal-list)
  "Define a trigger TRIGGER-NAME which sends GDB-COMMAND and sets
HANDLER-NAME as its handler. HANDLER-NAME is bound to current
buffer with `gdb-bind-function-to-buffer'.

If SIGNAL-LIST is non-nil, GDB-COMMAND is sent only when the
defined trigger is called with an argument from SIGNAL-LIST.

Normally the trigger defined by this command must be called from
the buffer where HANDLER-NAME must work. This should be done so
that buffer-local thread number may be used in GDB-COMMAND (by
calling `gdb-current-context-command').
`gdb-bind-function-to-buffer' is used to achieve this, see
`gdb-get-buffer-create'.

Triggers defined by this command are meant to be used as a
trigger argument when describing buffer types with
`gdb-set-buffer-rules'."
  `(defun ,trigger-name (&optional signal)
     (when
         (or (not ,signal-list)
             (memq signal ,signal-list))
       (when (not (gdb-pending-p
                   (cons (current-buffer) ',trigger-name)))
         (gdb-input
          (list ,gdb-command
                (gdb-bind-function-to-buffer ',handler-name (current-buffer))))
         (gdb-add-pending (cons (current-buffer) ',trigger-name))))))

;; Used by disassembly buffer only, the rest use
;; def-gdb-trigger-and-handler
(defmacro def-gdb-auto-update-handler (handler-name trigger-name custom-defun &optional nopreserve)
  "Define a handler HANDLER-NAME for TRIGGER-NAME with CUSTOM-DEFUN.

Handlers are normally called from the buffers they put output in.

Delete ((current-buffer) . TRIGGER-NAME) from
`gdb-pending-triggers', erase current buffer and evaluate
CUSTOM-DEFUN. Then `gdb-update-buffer-name' is called.

If NOPRESERVE is non-nil, window point is not restored after CUSTOM-DEFUN."
  `(defun ,handler-name ()
     (gdb-delete-pending (cons (current-buffer) ',trigger-name))
     (let* ((buffer-read-only nil)
            (window (get-buffer-window (current-buffer) 0))
            (start (window-start window))
            (p (window-point window)))
       (erase-buffer)
       (,custom-defun)
       (gdb-update-buffer-name)
       ,(when (not nopreserve)
          '(set-window-start window start)
          '(set-window-point window p)))))

(defmacro def-gdb-trigger-and-handler (trigger-name gdb-command
                                       handler-name custom-defun
                                       &optional signal-list)
  "Define trigger and handler.

TRIGGER-NAME trigger is defined to send GDB-COMMAND. See
`def-gdb-auto-update-trigger'. SIGNAL-LIST determines when 

HANDLER-NAME handler uses customization of CUSTOM-DEFUN. See
`def-gdb-auto-update-handler'."
  `(progn
     (def-gdb-auto-update-trigger ,trigger-name
       ,gdb-command
       ,handler-name ,signal-list)
     (def-gdb-auto-update-handler ,handler-name
       ,trigger-name ,custom-defun)))

\f

;; Breakpoint buffer : This displays the output of `-break-list'.
(def-gdb-trigger-and-handler
  gdb-invalidate-breakpoints "-break-list"
  gdb-breakpoints-list-handler gdb-breakpoints-list-handler-custom)

(gdb-set-buffer-rules 
 'gdb-breakpoints-buffer
 'gdb-breakpoints-buffer-name 
 'gdb-breakpoints-mode
 'gdb-invalidate-breakpoints)

(defun gdb-breakpoints-list-handler-custom ()
  (let ((breakpoints-list (gdb-get-field 
                           (gdb-json-partial-output "bkpt" "script")
                           'BreakpointTable 'body)))
    (setq gdb-breakpoints-list nil)
    (insert "Num\tType\t\tDisp\tEnb\tHits\tAddr       What\n")
    (dolist (breakpoint breakpoints-list)
      (add-to-list 'gdb-breakpoints-list 
                   (cons (gdb-get-field breakpoint 'number)
                         breakpoint))
      (insert
       (concat
        (gdb-get-field breakpoint 'number) "\t"
        (gdb-get-field breakpoint 'type) "\t"
        (gdb-get-field breakpoint 'disp) "\t"
        (let ((flag (gdb-get-field breakpoint 'enabled)))
          (if (string-equal flag "y")
              (propertize "y" 'face  font-lock-warning-face)
            (propertize "n" 'face  font-lock-comment-face))) "\t"
        (gdb-get-field breakpoint 'times) "\t"
        (gdb-get-field breakpoint 'addr)))
      (let ((at (gdb-get-field breakpoint 'at)))
        (cond ((not at)
               (progn
                 (insert 
                  (concat " in "
                          (propertize (gdb-get-field breakpoint 'func)
                                      'face font-lock-function-name-face)))
                 (gdb-insert-frame-location breakpoint)
                 (add-text-properties (line-beginning-position)
                                      (line-end-position)
                                      '(mouse-face highlight
                                        help-echo "mouse-2, RET: visit breakpoint"))))
              (at (insert (concat " " at)))
              (t (insert (gdb-get-field breakpoint 'original-location)))))
      (add-text-properties (line-beginning-position)
                           (line-end-position)
                           `(gdb-breakpoint ,breakpoint))
      (newline))
    (gdb-place-breakpoints)))

;; Put breakpoint icons in relevant margins (even those set in the GUD buffer).
(defun gdb-place-breakpoints ()
  (let ((flag) (bptno))
    ;; Remove all breakpoint-icons in source buffers but not assembler buffer.
    (dolist (buffer (buffer-list))
      (with-current-buffer buffer
        (if (and (eq gud-minor-mode 'gdbmi)
                 (not (string-match "\\` ?\\*.+\\*\\'" (buffer-name))))
            (gdb-remove-breakpoint-icons (point-min) (point-max)))))
    (dolist (breakpoint gdb-breakpoints-list)
      (let* ((breakpoint (cdr breakpoint)) ; gdb-breakpoints-list is
                                           ; an associative list
             (line (gdb-get-field breakpoint 'line)))
        (when line
          (let ((file (gdb-get-field breakpoint 'fullname))
                (flag (gdb-get-field breakpoint 'enabled))
                (bptno (gdb-get-field breakpoint 'number)))
            (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)
                  (gdb-init-buffer)
                  ;; Only want one breakpoint icon at each location.
                  (save-excursion
                    (goto-line (string-to-number line))
                    (gdb-put-breakpoint-icon (string-equal flag "y") bptno)))
              (gdb-input
               (list (concat "list " file ":1")
                     'ignore))
              (gdb-input
               (list "-file-list-exec-source-file"
                     `(lambda () (gdb-get-location
                                  ,bptno ,line ,flag)))))))))))

(defvar gdb-source-file-regexp "fullname=\"\\(.*?\\)\"")

(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 (re-search-forward gdb-source-file-regexp nil t)
        (delete (cons bptno "File not found") gdb-location-alist)
        (push (cons bptno (match-string 1)) gdb-location-alist)
      (gdb-resync)
      (unless (assoc bptno gdb-location-alist)
        (push (cons bptno "File not found") gdb-location-alist)
        (message-box "Cannot find source file for breakpoint location.
Add directory to search path for source files using the GDB command, dir."))
      (throw 'file-not-found nil))
    (with-current-buffer (find-file-noselect (match-string 1))
      (gdb-init-buffer)
      ;; 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
           (eq (buffer-local-value 'gud-minor-mode gud-comint-buffer)
               'gdbmi))
      (if (member buffer-file-name gdb-source-file-list)
          (with-current-buffer (find-buffer-visiting buffer-file-name)
            (gdb-init-buffer)))))

(declare-function gud-remove "gdb-mi" t t) ; gud-def
(declare-function gud-break  "gdb-mi" t t) ; gud-def
(declare-function fringe-bitmaps-at-pos "fringe.c" (&optional pos window))

(defun gdb-mouse-set-clear-breakpoint (event)
  "Set/clear breakpoint in left fringe/margin at mouse click.
If not in a source or disassembly buffer just set point."
  (interactive "e")
  (mouse-minibuffer-check event)
  (let ((posn (event-end event)))
    (with-selected-window (posn-window posn)
      (if (or (buffer-file-name) (eq major-mode 'gdb-disassembly-mode))
          (if (numberp (posn-point posn))
              (save-excursion
                (goto-char (posn-point posn))
                (if (or (posn-object posn)
                        (eq (car (fringe-bitmaps-at-pos (posn-point posn)))
                            'breakpoint))
                    (gud-remove nil)
                  (gud-break nil)))))
      (posn-set-point posn))))

(defun gdb-mouse-toggle-breakpoint-margin (event)
  "Enable/disable breakpoint in left margin with mouse click."
  (interactive "e")
  (mouse-minibuffer-check event)
  (let ((posn (event-end event)))
    (if (numberp (posn-point posn))
        (with-selected-window (posn-window posn)
          (save-excursion
            (goto-char (posn-point posn))
            (if (posn-object posn)
                (gud-basic-call
                 (let ((bptno (get-text-property
                               0 'gdb-bptno (car (posn-string posn)))))
                   (concat
                    (if (get-text-property
                         0 'gdb-enabled (car (posn-string posn)))
                        "-break-disable "
                      "-break-enable ")
                    bptno)))))))))

(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)
            (gud-basic-call
             (concat
              (if (get-text-property 0 'gdb-enabled obj)
                  "-break-disable "
                "-break-enable ")
               (get-text-property 0 'gdb-bptno obj)))))))))

(defun gdb-breakpoints-buffer-name ()
  (concat "*breakpoints of " (gdb-get-target-string) "*"))

(def-gdb-display-buffer
 gdb-display-breakpoints-buffer
 'gdb-breakpoints-buffer
 "Display status of user-settable breakpoints.")

(def-gdb-frame-for-buffer
 gdb-frame-breakpoints-buffer
 'gdb-breakpoints-buffer
 "Display status of user-settable breakpoints in a new frame.")

(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)))

;;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))

(defmacro gdb-propertize-header (name buffer help-echo mouse-face face)
  `(propertize ,name
               'help-echo ,help-echo 
               'mouse-face ',mouse-face
               'face ',face
               'local-map
               (gdb-make-header-line-mouse-map
                'mouse-1
                (lambda (event) (interactive "e")
                  (save-selected-window
                    (select-window (posn-window (event-start event)))
                    (set-window-dedicated-p (selected-window) nil)
                    (switch-to-buffer
                     (gdb-get-buffer-create ',buffer))
                    (setq header-line-format(gdb-set-header ',buffer))
                    (set-window-dedicated-p (selected-window) t))))))

(defun gdb-set-header (buffer)
  (cond ((eq buffer 'gdb-locals-buffer)
         (list
          (gdb-propertize-header "Locals" gdb-locals-buffer
                                 nil nil mode-line)
          " "
          (gdb-propertize-header "Registers" gdb-registers-buffer
                                 "mouse-1: select" mode-line-highlight mode-line-inactive)))
        ((eq buffer 'gdb-registers-buffer)
         (list
          (gdb-propertize-header "Locals" gdb-locals-buffer
                                 "mouse-1: select" mode-line-highlight mode-line-inactive)
          " "
          (gdb-propertize-header "Registers" gdb-registers-buffer
                                 nil nil mode-line)))
        ((eq buffer 'gdb-breakpoints-buffer)
         (list
          (gdb-propertize-header "Breakpoints" gdb-breakpoints-buffer
                                 nil nil mode-line)
          " "
          (gdb-propertize-header "Threads" gdb-threads-buffer
                                 "mouse-1: select" mode-line-highlight mode-line-inactive)))
        ((eq buffer 'gdb-threads-buffer)
         (list
          (gdb-propertize-header "Breakpoints" gdb-breakpoints-buffer
                                 "mouse-1: select" mode-line-highlight mode-line-inactive)
          " "
          (gdb-propertize-header "Threads" gdb-threads-buffer
                                 nil nil mode-line)))))

\f
;; uses "-thread-info". Needs GDB 7.0 onwards.
;;; Threads view

(defun gdb-jump-to (file line)
  (find-file-other-window file)
  (goto-line line))

(define-button-type 'gdb-file-button
  'help-echo "Push to jump to source code"
;  'face 'bold
  'action
  (lambda (b)
    (gdb-jump-to (button-get b 'file)
                 (button-get b 'line))))

(defun gdb-insert-file-location-button (file line)
  "Insert text button which allows jumping to FILE:LINE.

FILE is a full path."
  (insert-text-button
   (format "%s:%d" (file-name-nondirectory file) line)
   :type 'gdb-file-button
   'file file
   'line line))

(defun gdb-threads-buffer-name ()
  (concat "*threads of " (gdb-get-target-string) "*"))

(def-gdb-display-buffer
 gdb-display-threads-buffer
 'gdb-threads-buffer
 "Display GDB threads.")

(def-gdb-frame-for-buffer
 gdb-frame-threads-buffer
 'gdb-threads-buffer
 "Display GDB threads in a new frame.")

(def-gdb-trigger-and-handler
  gdb-invalidate-threads "-thread-info"
  gdb-thread-list-handler gdb-thread-list-handler-custom
  '(update update-threads))

(gdb-set-buffer-rules
 'gdb-threads-buffer 
 'gdb-threads-buffer-name
 'gdb-threads-mode
 'gdb-invalidate-threads)

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

(defvar gdb-threads-mode-map
  (let ((map (make-sparse-keymap)))
    (define-key map "\r" 'gdb-select-thread)
    (define-key map "f" 'gdb-display-stack-for-thread)
    (define-key map "F" 'gdb-frame-stack-for-thread)
    (define-key map "l" 'gdb-display-locals-for-thread)
    (define-key map "L" 'gdb-frame-locals-for-thread)
    (define-key map "r" 'gdb-display-registers-for-thread)
    (define-key map "R" 'gdb-frame-registers-for-thread)
    (define-key map "d" 'gdb-display-disassembly-for-thread)
    (define-key map "D" 'gdb-frame-disassembly-for-thread)
    (define-key map "i" 'gdb-interrupt-thread)
    (define-key map "c" 'gdb-continue-thread)
    (define-key map "s" 'gdb-step-thread)
    map))

(defvar gdb-breakpoints-header
  (list
   (gdb-propertize-header "Breakpoints" gdb-breakpoints-buffer
                          nil nil mode-line)
   " "
   (gdb-propertize-header "Threads" gdb-threads-buffer
                          "mouse-1: select" mode-line-highlight mode-line-inactive)))
(define-derived-mode gdb-threads-mode gdb-parent-mode "Threads"
  "Major mode for GDB threads.

\\{gdb-threads-mode-map}"
  (setq gdb-thread-position (make-marker))
  (add-to-list 'overlay-arrow-variable-list 'gdb-thread-position)
  (setq header-line-format gdb-breakpoints-header)
  (set (make-local-variable 'font-lock-defaults)
       '(gdb-threads-font-lock-keywords))
  (run-mode-hooks 'gdb-threads-mode-hook)
  'gdb-invalidate-threads)

(defun gdb-thread-list-handler-custom ()
  (let* ((res (gdb-json-partial-output))
         (threads-list (gdb-get-field res 'threads)))
    (setq gdb-threads-list nil)
    (setq gdb-running-threads-count 0)
    (setq gdb-stopped-threads-count 0)
    (set-marker gdb-thread-position nil)

    (dolist (thread (reverse threads-list))
      (let ((running (string-equal (gdb-get-field thread 'state) "running")))
      (add-to-list 'gdb-threads-list
                   (cons (gdb-get-field thread 'id)
                         thread))
      (if running
          (incf gdb-running-threads-count)
        (incf gdb-stopped-threads-count))

      (insert (apply 'format `("%s (%s) %s"
                               ,@(gdb-get-many-fields thread 'id 'target-id 'state))))
      ;; Include frame information for stopped threads
      (when (not running)
        (insert (concat " in " (gdb-get-field thread 'frame 'func)))
        (insert " (")
        (let ((args (gdb-get-field thread 'frame 'args)))
          (dolist (arg args)
            (insert (apply 'format `("%s=%s," ,@(gdb-get-many-fields arg 'name 'value)))))
          (when args (kill-backward-chars 1)))
        (insert ")")
        (gdb-insert-frame-location (gdb-get-field thread 'frame))
        (insert (format " at %s" (gdb-get-field thread 'frame 'addr))))
      (add-text-properties (line-beginning-position)
                           (line-end-position)
                           `(gdb-thread ,thread))
      ;; We assume that gdb-thread-number is non-nil by this time
      (when (string-equal gdb-thread-number
                          (gdb-get-field thread 'id))
        (set-marker gdb-thread-position (line-beginning-position))))
      (newline))
    ;; We update gud-running here because we need to make sure that
    ;; gdb-threads-list is up-to-date
    (gdb-update-gud-running)))

(defmacro def-gdb-thread-buffer-command (name custom-defun &optional doc)
  "Define a NAME command which will act upon thread on the current line.

CUSTOM-DEFUN may use locally bound `thread' variable, which will
be the value of 'gdb-thread property of the current line. If
'gdb-thread is nil, error is signaled."
  `(defun ,name ()
     ,(when doc doc)
     (interactive)
     (save-excursion
       (beginning-of-line)
       (let ((thread (get-text-property (point) 'gdb-thread)))
         (if thread
             ,custom-defun
           (error "Not recognized as thread line"))))))

(defmacro def-gdb-thread-buffer-simple-command (name buffer-command &optional doc)
  "Define a NAME which will call BUFFER-COMMAND with id of thread
on the current line."
  `(def-gdb-thread-buffer-command ,name
     (,buffer-command (gdb-get-field thread 'id))
     ,doc))

(def-gdb-thread-buffer-command gdb-select-thread
  (let ((new-id (gdb-get-field thread 'id)))
    (gdb-setq-thread-number new-id)
    (gdb-input (list (concat "-thread-select " new-id) 'ignore))
    (gdb-update))
  "Select the thread at current line of threads buffer.")

(def-gdb-thread-simple-buffer-command
  gdb-display-stack-for-thread
  gdb-display-stack-buffer
  "Display stack buffer for the thread at current line.")

(def-gdb-thread-simple-buffer-command
  gdb-display-locals-for-thread
  gdb-display-locals-buffer
  "Display locals buffer for the thread at current line.")

(def-gdb-thread-simple-buffer-command
  gdb-display-registers-for-thread
  gdb-display-registers-buffer
  "Display registers buffer for the thread at current line.")

(def-gdb-thread-buffer-simple-command
  gdb-display-disassembly-for-thread
  gdb-display-disassembly-buffer
  "Display disassembly buffer for the thread at current line.")

(def-gdb-thread-simple-buffer-command
  gdb-frame-stack-for-thread
  gdb-frame-stack-buffer
  "Display a new frame with stack buffer for the thread at
current line.")

(def-gdb-thread-simple-buffer-command
  gdb-frame-locals-for-thread
  gdb-frame-locals-buffer
  "Display a new frame with locals buffer for the thread at
current line.")

(def-gdb-thread-simple-buffer-command
  gdb-frame-registers-for-thread
  gdb-frame-registers-buffer
  "Display a new frame with registers buffer for the thread at
current line.")

(def-gdb-thread-buffer-simple-command
  gdb-frame-disassembly-for-thread
  gdb-frame-disassembly-buffer
  "Display a new frame with disassembly buffer for the thread at
current line.")

(defmacro def-gdb-thread-buffer-gdb-command (name gdb-command &optional doc)
  "Define a NAME which will execute send GDB-COMMAND with
`gdb-thread-number' locally bound to id of thread on the current
line."
  `(def-gdb-thread-buffer-command ,name
     (if gdb-non-stop
         (let ((gdb-thread-number (gdb-get-field thread 'id)))
           (gdb-input (list (gdb-current-context-command ,gdb-command)
                            'ignore)))
       (error "Available in non-stop mode only, customize gdb-non-stop."))
       ,doc))

;; Does this make sense in all-stop mode?
(def-gdb-thread-buffer-gdb-command
  gdb-interrupt-thread
  "-exec-interrupt"
  "Interrupt thread at current line.")

(def-gdb-thread-buffer-gdb-command
  gdb-continue-thread
  "-exec-continue"
  "Continue thread at current line.")

(def-gdb-thread-buffer-gdb-command
  gdb-step-thread
  "-exec-step"
  "Step thread at current line.")

\f
;;; Memory view

(defcustom gdb-memory-rows 8
  "Number of data rows in memory window."
  :type 'integer
  :group 'gud
  :version "23.2")

(defcustom gdb-memory-columns 4
  "Number of data columns in memory window."
  :type 'integer
  :group 'gud
  :version "23.2")

(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 4
  "Unit size of data items in memory window."
  :type '(choice (const :tag "Byte" 1)
                 (const :tag "Halfword" 2)
                 (const :tag "Word" 4)
                 (const :tag "Giant word" 8))
  :group 'gud
  :version "23.2")

(def-gdb-trigger-and-handler
  gdb-invalidate-memory
  (format "-data-read-memory %s %s %d %d %d" 
          gdb-memory-address
          gdb-memory-format
          gdb-memory-unit
          gdb-memory-rows
          gdb-memory-columns)
  gdb-read-memory-handler
  gdb-read-memory-custom)

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

(defun gdb-memory-column-width (size format)
  "Return length of string with memory unit of SIZE in FORMAT.

SIZE is in bytes, as in `gdb-memory-unit'. FORMAT is a string as
in `gdb-memory-format'."
  (let ((format-base (cdr (assoc format
                                 '(("x" . 16)
                                   ("d" . 10) ("u" . 10)
                                   ("o" . 8)
                                   ("t" . 2))))))
    (if format-base
        (let ((res (ceiling (log (expt 2.0 (* size 8)) format-base))))
          (cond ((string-equal format "x")
                 (+ 2 res)) ; hexadecimal numbers have 0x in front
                ((or (string-equal format "d")
                     (string-equal format "o"))
                 (1+ res))
                (t res)))
      (error "Unknown format"))))

(defun gdb-read-memory-custom ()
  (let* ((res (gdb-json-partial-output))
         (err-msg (gdb-get-field res 'msg)))
    (if (not err-msg)
        (let ((memory (gdb-get-field res 'memory)))
          (setq gdb-memory-address (gdb-get-field res 'addr))
          (setq gdb-memory-next-page (gdb-get-field res 'next-page))
          (setq gdb-memory-prev-page (gdb-get-field res 'prev-page))
          (setq gdb-memory-last-address gdb-memory-address)
        (dolist (row memory)
          (insert (concat (gdb-get-field row 'addr) ":"))
          (dolist (column (gdb-get-field row 'data))
            (insert (gdb-pad-string column
                                    (+ 2 (gdb-memory-column-width
                                          gdb-memory-unit
                                          gdb-memory-format)))))
          (newline)))
      ;; Show last page instead of empty buffer when out of bounds
      (progn
        (let ((gdb-memory-address gdb-memory-last-address))
          (gdb-invalidate-memory)
          (error err-msg))))))

(defvar gdb-memory-mode-map
  (let ((map (make-sparse-keymap)))
    (suppress-keymap map t)
    (define-key map "q" 'kill-this-buffer)
    (define-key map "n" 'gdb-memory-show-next-page)
    (define-key map "p" 'gdb-memory-show-previous-page)
    (define-key map "a" 'gdb-memory-set-address)
    (define-key map "t" 'gdb-memory-format-binary)
    (define-key map "o" 'gdb-memory-format-octal)
    (define-key map "u" 'gdb-memory-format-unsigned)
    (define-key map "d" 'gdb-memory-format-signed)
    (define-key map "x" 'gdb-memory-format-hexadecimal)
    (define-key map "b" 'gdb-memory-unit-byte)
    (define-key map "h" 'gdb-memory-unit-halfword)
    (define-key map "w" 'gdb-memory-unit-word)
    (define-key map "g" 'gdb-memory-unit-giant)
    (define-key map "R" 'gdb-memory-set-rows)
    (define-key map "C" 'gdb-memory-set-columns)
     map))

(defun gdb-memory-set-address-event (event)
  "Handle a click on address field in memory buffer header."
  (interactive "e")
  (save-selected-window
    (select-window (posn-window (event-start event)))
    (gdb-memory-set-address)))

;; Non-event version for use within keymap
(defun gdb-memory-set-address ()
  "Set the start memory address."
  (interactive)
  (let ((arg (read-from-minibuffer "Memory address: ")))
    (setq gdb-memory-address arg))
  (gdb-invalidate-memory))

(defmacro def-gdb-set-positive-number (name variable echo-string &optional doc)
  "Define a function NAME which reads new VAR value from minibuffer."
  `(defun ,name (event)
     ,(when doc doc)
     (interactive "e")
     (save-selected-window
       (select-window (posn-window (event-start event)))
       (let* ((arg (read-from-minibuffer ,echo-string))
              (count (string-to-number arg)))
         (if (<= count 0)
             (error "Positive number only")
           (customize-set-variable ',variable count)
           (gdb-invalidate-memory))))))

(def-gdb-set-positive-number
  gdb-memory-set-rows
  gdb-memory-rows
  "Rows: "
  "Set the number of data rows in memory window.")

(def-gdb-set-positive-number
  gdb-memory-set-columns
  gdb-memory-columns
  "Columns: "
  "Set the number of data columns in memory window.")

(defmacro def-gdb-memory-format (name format doc)
  "Define a function NAME to switch memory buffer to use FORMAT.

DOC is an optional documentation string."
  `(defun ,name () ,(when doc doc)
     (interactive)
     (customize-set-variable 'gdb-memory-format ,format)
     (gdb-invalidate-memory)))

(def-gdb-memory-format
  gdb-memory-format-binary "t"
  "Set the display format to binary.")

(def-gdb-memory-format
  gdb-memory-format-octal "o"
  "Set the display format to octal.")

(def-gdb-memory-format
  gdb-memory-format-unsigned "u"
  "Set the display format to unsigned decimal.")

(def-gdb-memory-format
  gdb-memory-format-signed "d"
  "Set the display format to decimal.")

(def-gdb-memory-format
  gdb-memory-format-hexadecimal "x"
  "Set the display format to hexadecimal.")

(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)))))

(defmacro def-gdb-memory-unit (name unit-size doc)
  "Define a function NAME to switch memory unit size to UNIT-SIZE.

DOC is an optional documentation string."
  `(defun ,name () ,(when doc doc)
     (interactive)
     (customize-set-variable 'gdb-memory-unit ,unit-size)
     (gdb-invalidate-memory)))

(def-gdb-memory-unit gdb-memory-unit-giant 8
  "Set the unit size to giant words (eight bytes).")

(def-gdb-memory-unit gdb-memory-unit-word 4
  "Set the unit size to words (four bytes).")

(def-gdb-memory-unit gdb-memory-unit-halfword 2
  "Set the unit size to halfwords (two bytes).")

(def-gdb-memory-unit gdb-memory-unit-byte 1
  "Set the unit size to bytes.")

(defmacro def-gdb-memory-show-page (name address-var &optional doc)
  "Define a function NAME which show new address in memory buffer.

The defined function switches Memory buffer to show address
stored in ADDRESS-VAR variable.

DOC is an optional documentation string."
  `(defun ,name
     ,(when doc doc)
     (interactive)
     (let ((gdb-memory-address ,address-var))
       (gdb-invalidate-memory))))

(def-gdb-memory-show-page gdb-memory-show-previous-page
  gdb-memory-prev-page)

(def-gdb-memory-show-page gdb-memory-show-next-page
  gdb-memory-next-page)

(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 8))))
(define-key gdb-memory-unit-menu [words]
  '(menu-item "Words" gdb-memory-unit-word
              :button (:radio . (equal gdb-memory-unit 4))))
(define-key gdb-memory-unit-menu [halfwords]
  '(menu-item "Halfwords" gdb-memory-unit-halfword
              :button (:radio . (equal gdb-memory-unit 2))))
(define-key gdb-memory-unit-menu [bytes]
  '(menu-item "Bytes" gdb-memory-unit-byte
              :button (:radio . (equal gdb-memory-unit 1))))

(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)))))

(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'.")

(defvar gdb-memory-header
  '(:eval
    (concat
     "Start 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
                              #'gdb-memory-show-previous-page))
     "|"
     (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
                             #'gdb-memory-show-next-page))
    "]: "
    (propertize gdb-memory-address
                 'face font-lock-warning-face
                 'help-echo "mouse-1: set start address"
                 'mouse-face 'mode-line-highlight
                 'local-map (gdb-make-header-line-mouse-map
                             'mouse-1
                             #'gdb-memory-set-address-event))
    "  Rows: "
    (propertize (number-to-string gdb-memory-rows)
                 'face font-lock-warning-face
                 'help-echo "mouse-1: set number of columns"
                 'mouse-face 'mode-line-highlight
                 'local-map (gdb-make-header-line-mouse-map
                             'mouse-1
                             #'gdb-memory-set-rows))
    "  Columns: "
    (propertize (number-to-string gdb-memory-columns)
                 'face font-lock-warning-face
                 'help-echo "mouse-1: set number of columns"
                 'mouse-face 'mode-line-highlight
                 'local-map (gdb-make-header-line-mouse-map
                             'mouse-1
                             #'gdb-memory-set-columns))
    "  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 (number-to-string 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)))
  "Header line used in `gdb-memory-mode'.")

(define-derived-mode gdb-memory-mode gdb-parent-mode "Memory"
  "Major mode for examining memory.

\\{gdb-memory-mode-map}"
  (setq header-line-format gdb-memory-header)
  (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 ()
  (concat "*memory of " (gdb-get-target-string) "*"))

(def-gdb-display-buffer
  gdb-display-memory-buffer
  'gdb-memory-buffer
  "Display memory contents.")

(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
          `((left-fringe . 0)
            (right-fringe . 0)
            (width . 83) 
            ,@gdb-frame-parameters)))
    (display-buffer (gdb-get-buffer-create 'gdb-memory-buffer))))

\f
;;; Disassembly view

(defun gdb-disassembly-buffer-name ()
  (gdb-current-context-buffer-name
   (concat "disassembly of " (gdb-get-target-string))))

(def-gdb-display-buffer
 gdb-display-disassembly-buffer
 'gdb-disassembly-buffer
 "Display disassembly for current stack frame.")

(def-gdb-frame-for-buffer
 gdb-frame-disassembly-buffer
 'gdb-disassembly-buffer
 "Display disassembly in a new frame.")

(def-gdb-auto-update-trigger gdb-invalidate-disassembly
  (let* ((frame (gdb-current-buffer-frame))
         (file (gdb-get-field frame 'file))
         (line (gdb-get-field frame 'line)))
    (when file
      (format "-data-disassemble -f %s -l %s -n -1 -- 0" file line)))
  gdb-disassembly-handler)

(def-gdb-auto-update-handler
  gdb-disassembly-handler
  gdb-invalidate-disassembly
  gdb-disassembly-handler-custom
  t)

(gdb-set-buffer-rules
 'gdb-disassembly-buffer
 'gdb-disassembly-buffer-name
 'gdb-disassembly-mode
 'gdb-invalidate-disassembly)

(defvar gdb-disassembly-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-disassembly-mode'.")

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

(define-derived-mode gdb-disassembly-mode gdb-parent-mode "Disassembly"
  "Major mode for GDB disassembly information.

\\{gdb-disassembly-mode-map}"
  ;; TODO Rename overlay variable for disassembly mode
  (add-to-list 'overlay-arrow-variable-list 'gdb-overlay-arrow-position)
  (setq fringes-outside-margins t)
  (setq gdb-overlay-arrow-position (make-marker))
  (set (make-local-variable 'font-lock-defaults)
       '(gdb-disassembly-font-lock-keywords))
  (run-mode-hooks 'gdb-disassembly-mode-hook)
  'gdb-invalidate-disassembly)

(defun gdb-disassembly-handler-custom ()
  (let* ((pos 1)
         (address (gdb-get-field (gdb-current-buffer-frame) 'addr))
         (res (gdb-json-partial-output))
         (instructions (gdb-get-field res 'asm_insns))
         (last-instr (car (last instructions)))
         (column-padding (+ 2 (string-width
                               (apply 'format
                                      `("<%s+%s>:"
                                        ,@(gdb-get-many-fields last-instr 'func-name 'offset)))))))
      (dolist (instr instructions)
      ;; Put overlay arrow
      (when (string-equal (gdb-get-field instr 'address)
                          address)
        (progn
          (setq pos (point))
          (setq fringe-indicator-alist
                (if (string-equal gdb-frame-number "0")
                    nil
                  '((overlay-arrow . hollow-right-triangle))))
          (set-marker gdb-overlay-arrow-position (point))))
      (insert 
       (concat
        (gdb-get-field instr 'address)
        " "
        (gdb-pad-string (apply 'format `("<%s+%s>:" ,@(gdb-get-many-fields instr 'func-name 'offset)))
                        (- column-padding))
        (gdb-get-field instr 'inst)
        "\n")))
      (gdb-disassembly-place-breakpoints)
      (let ((window (get-buffer-window (current-buffer) 0)))
        (set-window-point window pos))
      (setq mode-name
            (concat "Disassembly: " 
                    (gdb-get-field (gdb-current-buffer-frame) 'func)))))

(defun gdb-disassembly-place-breakpoints ()
  (gdb-remove-breakpoint-icons (point-min) (point-max))
  (dolist (breakpoint gdb-breakpoints-list)
    (let* ((breakpoint (cdr breakpoint))
           (bptno (gdb-get-field breakpoint 'number))
           (flag (gdb-get-field breakpoint 'enabled))
           (address (gdb-get-field breakpoint 'addr)))
      (save-excursion
        (goto-char (point-min))
        (if (re-search-forward (concat "^" address) nil t)
            (gdb-put-breakpoint-icon (string-equal flag "y") bptno))))))

\f
;;; Breakpoints view

(define-derived-mode gdb-breakpoints-mode gdb-parent-mode "Breakpoints"
  "Major mode for gdb breakpoints.

\\{gdb-breakpoints-mode-map}"
  (setq header-line-format gdb-breakpoints-header)
  (run-mode-hooks 'gdb-breakpoints-mode-hook)
  'gdb-invalidate-breakpoints)

(defun gdb-toggle-breakpoint ()
  "Enable/disable breakpoint at current line of breakpoints buffer."
  (interactive)
  (save-excursion
    (beginning-of-line)
    (let ((breakpoint (get-text-property (point) 'gdb-breakpoint)))
      (if breakpoint
          (gud-basic-call
           (concat (if (string-equal "y" (gdb-get-field breakpoint 'enabled))
                       "-break-disable "
                     "-break-enable ")
                   (gdb-get-field breakpoint 'number)))
        (error "Not recognized as break/watchpoint line")))))

(defun gdb-delete-breakpoint ()
  "Delete the breakpoint at current line of breakpoints buffer."
  (interactive)
  (save-excursion
  (beginning-of-line)
  (let ((breakpoint (get-text-property (point) 'gdb-breakpoint)))
    (if breakpoint
        (gud-basic-call (concat "-break-delete " (gdb-get-field breakpoint 'number)))
      (error "Not recognized as break/watchpoint line")))))
  
(defun gdb-goto-breakpoint (&optional event)
  "Go to the location of breakpoint at current line of
breakpoints buffer."
  (interactive (list last-input-event))
  (if event (posn-set-point (event-end event)))
  ;; Hack to stop gdb-goto-breakpoint displaying in GUD buffer.
  (let ((window (get-buffer-window gud-comint-buffer)))
    (if window (save-selected-window  (select-window window))))
  (save-excursion
  (beginning-of-line)
  (let ((breakpoint (get-text-property (point) 'gdb-breakpoint)))
    (if breakpoint
        (let ((bptno (gdb-get-field breakpoint 'number))
              (file  (gdb-get-field breakpoint 'fullname))
              (line  (gdb-get-field breakpoint 'line)))
          (save-selected-window
            (let* ((buffer (find-file-noselect
                         (if (file-exists-p file) file
                           (cdr (assoc bptno gdb-location-alist)))))
                   (window (or (gdb-display-source-buffer buffer)
                               (display-buffer buffer))))
              (setq gdb-source-window window)
              (with-current-buffer buffer
                (goto-line (string-to-number line))
                (set-window-point window (point))))))
      (error "Not recognized as break/watchpoint line")))))

\f
;; Frames buffer.  This displays a perpetually correct bactrack trace.
;;
(def-gdb-trigger-and-handler
  gdb-invalidate-frames (gdb-current-context-command "-stack-list-frames")
  gdb-stack-list-frames-handler gdb-stack-list-frames-custom)

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

(defun gdb-insert-frame-location (frame)
  "Insert \"of file:line\" button or library name for structure FRAME.

FRAME must have either \"file\" and \"line\" members or \"from\"
member."
  (let ((file (gdb-get-field frame 'fullname))
        (line (gdb-get-field frame 'line))
        (from (gdb-get-field frame 'from)))
    (cond (file
           ;; Filename with line number
           (insert " of ")
           (gdb-insert-file-location-button
            file (string-to-number line)))
          ;; Library
          (from (insert (format " of %s" from))))))

(defun gdb-stack-list-frames-custom ()
  (let* ((res (gdb-json-partial-output "frame"))
         (stack (gdb-get-field res 'stack)))
         (dolist (frame stack)
           (insert (apply 'format `("%s in %s" ,@(gdb-get-many-fields frame 'level 'func))))
           (gdb-insert-frame-location frame)
           (newline))
         (save-excursion
           (goto-char (point-min))
           (while (< (point) (point-max))
             (add-text-properties (point-at-bol) (1+ (point-at-bol))
                                  '(mouse-face highlight
                                               help-echo "mouse-2, RET: Select frame"))
             (beginning-of-line)
             (when (and (looking-at "^[0-9]+\\s-+\\S-+\\s-+\\(\\S-+\\)")
                        (equal (match-string 1) gdb-selected-frame))
               (if (> (car (window-fringes)) 0)
                   (progn
                     (or gdb-stack-position
                         (setq gdb-stack-position (make-marker)))
                     (set-marker gdb-stack-position (point)))
                 (let ((bl (point-at-bol)))
                   (put-text-property bl (+ bl 4)
                                      'face '(:inverse-video t)))))
             (forward-line 1)))))

(defun gdb-stack-buffer-name ()
  (gdb-current-context-buffer-name
   (concat "stack frames of " (gdb-get-target-string))))

(def-gdb-display-buffer
 gdb-display-stack-buffer
 'gdb-stack-buffer
 "Display backtrace of current stack.")

(def-gdb-frame-for-buffer
 gdb-frame-stack-buffer
 'gdb-stack-buffer
 "Display backtrace of current stack in a new frame.")

(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))

(defvar gdb-frames-font-lock-keywords
  '(("in \\([^ ]+\\) of "  (1 font-lock-function-name-face)))
  "Font lock keywords used in `gdb-frames-mode'.")

(define-derived-mode gdb-frames-mode gdb-parent-mode "Frames"
  "Major mode for gdb call stack.

\\{gdb-frames-mode-map}"
  (setq gdb-stack-position nil)
  (add-to-list 'overlay-arrow-variable-list 'gdb-stack-position)
  (setq truncate-lines t)  ;; Make it easier to see overlay arrow.
  (set (make-local-variable 'font-lock-defaults)
       '(gdb-frames-font-lock-keywords))
  (run-mode-hooks 'gdb-frames-mode-hook)
  'gdb-invalidate-frames)

(defun gdb-get-frame-number ()
  (save-excursion
    (end-of-line)
    (let* ((pos (re-search-backward "^\\([0-9]+\\)" nil 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)))
  (gud-basic-call (concat "-stack-select-frame " (gdb-get-frame-number))))

\f
;; Locals buffer.
;; uses "-stack-list-locals --simple-values". Needs GDB 6.1 onwards.
(def-gdb-trigger-and-handler
  gdb-invalidate-locals
  (concat (gdb-current-context-command "-stack-list-locals") " --simple-values")
  gdb-locals-handler gdb-locals-handler-custom)

(gdb-set-buffer-rules
 'gdb-locals-buffer
 'gdb-locals-buffer-name
 'gdb-locals-mode
 'gdb-invalidate-locals)

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

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

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

;; Dont display values of arrays or structures.
;; These can be expanded using gud-watch.
(defun gdb-locals-handler-custom ()
  (let ((locals-list (gdb-get-field (gdb-json-partial-output) 'locals)))
    (dolist (local locals-list)
      (let ((name (gdb-get-field local 'name))
            (value (gdb-get-field local 'value))
            (type (gdb-get-field local 'type)))
        (if (or (not value)
                (string-match "\\0x" value))
            (add-text-properties 0 (length name)
                            `(mouse-face highlight
                              help-echo "mouse-2: create watch expression"
                              local-map ,gdb-locals-watch-map)
                            name)
          (add-text-properties 0 (length value)
                               `(mouse-face highlight
                                help-echo "mouse-2: edit value"
                                local-map ,gdb-edit-locals-map-1)
                              value))
                       (insert
                        (concat name "\t" type
                                "\t" value "\n"))))
    (setq mode-name
          (concat "Locals: " (gdb-get-field (gdb-current-buffer-frame) 'func)))))

(defvar gdb-locals-header
  (list
   (gdb-propertize-header "Locals" gdb-locals-buffer
                          nil nil mode-line)
   " "
   (gdb-propertize-header "Registers" gdb-registers-buffer
                          "mouse-1: select" mode-line-highlight mode-line-inactive)))

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

(define-derived-mode gdb-locals-mode gdb-parent-mode "Locals"
  "Major mode for gdb locals.

\\{gdb-locals-mode-map}"
  (setq header-line-format gdb-locals-header)
  (set (make-local-variable 'font-lock-defaults)
       '(gdb-locals-font-lock-keywords))
  (run-mode-hooks 'gdb-locals-mode-hook)
  'gdb-invalidate-locals)

(defun gdb-locals-buffer-name ()
  (gdb-current-context-buffer-name
   (concat "locals of " (gdb-get-target-string))))

(def-gdb-display-buffer
 gdb-display-locals-buffer
 'gdb-locals-buffer
 "Display local variables of current stack and their values.")

(def-gdb-frame-for-buffer
 gdb-frame-locals-buffer
 'gdb-locals-buffer
 "Display local variables of current stack and their values in a new frame.")

\f
;; Registers buffer.

(def-gdb-trigger-and-handler
  gdb-invalidate-registers
  (concat (gdb-current-context-command "-data-list-register-values") " x")
  gdb-registers-handler
  gdb-registers-handler-custom)

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

(defun gdb-registers-handler-custom ()
  (let ((register-values (gdb-get-field (gdb-json-partial-output) 'register-values))
        (register-names-list (reverse gdb-register-names)))
    (dolist (register register-values)
      (let* ((register-number (gdb-get-field register 'number))
             (value (gdb-get-field register 'value))
             (register-name (nth (string-to-number register-number) 
                                 register-names-list)))
        (insert 
         (concat
          (propertize register-name 'face font-lock-variable-name-face) 
          "\t"
          (if (member register-number gdb-changed-registers)
              (propertize value 'face font-lock-warning-face)
            value)
          "\n"))))))

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

(define-derived-mode gdb-registers-mode gdb-parent-mode "Registers"
  "Major mode for gdb registers.

\\{gdb-registers-mode-map}"
  (setq header-line-format gdb-locals-header)
  (run-mode-hooks 'gdb-registers-mode-hook)
  'gdb-invalidate-registers)

(defun gdb-registers-buffer-name ()
  (gdb-current-context-buffer-name
   (concat "registers of " (gdb-get-target-string))))

(def-gdb-display-buffer
 gdb-display-registers-buffer
 'gdb-registers-buffer
 "Display integer register contents.")

(def-gdb-frame-for-buffer
 gdb-frame-registers-buffer
 'gdb-registers-buffer
  "Display integer register contents in a new frame.")

;; 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 (gdb-pending-p 'gdb-get-changed-registers)))
      (progn
        (gdb-input
         (list
          "-data-list-changed-registers"
          'gdb-changed-registers-handler))
        (gdb-add-pending 'gdb-get-changed-registers))))

(defun gdb-changed-registers-handler ()
  (gdb-delete-pending 'gdb-get-changed-registers)
  (setq gdb-changed-registers nil)
  (dolist (register-number (gdb-get-field (gdb-json-partial-output) 'changed-registers))
    (push register-number gdb-changed-registers)))

(defun gdb-register-names-handler ()
  ;; Don't use gdb-pending-triggers because this handler is called
  ;; only once (in gdb-init-1)
  (setq gdb-register-names nil)
  (dolist (register-name (gdb-get-field (gdb-json-partial-output) 'register-names))
    (push register-name gdb-register-names))
  (setq gdb-register-names (reverse gdb-register-names)))
\f

(defun gdb-get-source-file-list ()
  "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 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)
        (gdb-init-buffer))))
  (gdb-force-mode-line-update
   (propertize "ready" 'face font-lock-variable-name-face)))

(defun gdb-get-main-selected-frame ()
  "Trigger for `gdb-frame-handler' which uses main current
thread. Called from `gdb-update'."
  (if (not (gdb-pending-p 'gdb-get-main-selected-frame))
      (progn
        (gdb-input
         (list (gdb-current-context-command "-stack-info-frame") 'gdb-frame-handler))
        (gdb-add-pending 'gdb-get-main-selected-frame))))

(defun gdb-frame-handler ()
  "Sets `gdb-pc-address', `gdb-selected-frame' and
  `gdb-selected-file' to show overlay arrow in source buffer."
  (gdb-delete-pending 'gdb-get-main-selected-frame)
  (let ((frame (gdb-get-field (gdb-json-partial-output) 'frame)))
    (when frame
      (setq gdb-frame-number (gdb-get-field frame 'level))
      (setq gdb-selected-frame (gdb-get-field frame 'func))
      (setq gdb-selected-file (gdb-get-field frame 'fullname))
      (let ((line (gdb-get-field frame 'line)))
        (setq gdb-selected-line (or (and line (string-to-number line))
                                    nil)) ; don't fail if line is nil
        (when line ; obey the current file only if we have line info
          (setq gud-last-frame (cons gdb-selected-file gdb-selected-line))
          (gud-display-frame)))
      (if gud-overlay-arrow-position
          (let ((buffer (marker-buffer gud-overlay-arrow-position))
                (position (marker-position gud-overlay-arrow-position)))
            (when buffer
              (with-current-buffer buffer
                (setq fringe-indicator-alist
                      (if (string-equal gdb-frame-number "0")
                          nil
                        '((overlay-arrow . hollow-right-triangle))))
                (setq gud-overlay-arrow-position (make-marker))
                (set-marker gud-overlay-arrow-position position))))))))
  
(defvar gdb-prompt-name-regexp "value=\"\\(.*?\\)\"")

(defun gdb-get-prompt ()
  "Find prompt for GDB session."
  (goto-char (point-min))
  (setq gdb-prompt-name nil)
  (re-search-forward gdb-prompt-name-regexp nil t)
  (setq gdb-prompt-name (match-string 1))
  ;; Insert first prompt.
  (setq gdb-filter-output (concat gdb-filter-output gdb-prompt-name)))

;;;; Window management
(defun gdb-display-buffer (buf dedicated &optional frame)
  (let ((answer (get-buffer-window buf (or frame 0))))
    (if answer
        (display-buffer buf nil (or frame 0)) ;Deiconify the frame if necessary.
      (let ((window (get-lru-window)))
        (if (eq (buffer-local-value 'gud-minor-mode (window-buffer window))
                  'gdbmi)
            (let* ((largest (get-largest-window))
                   (cur-size (window-height largest)))
              (setq answer (split-window largest))
              (set-window-buffer answer buf)
              (set-window-dedicated-p answer dedicated)
              answer)
          (set-window-buffer window buf)
          window)))))

\f
;;; Shared keymap initialization:

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

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

(let ((menu (make-sparse-keymap "GDB-MI"))
      (submenu (make-sparse-keymap "GUD thread control mode")))
  (define-key menu [gdb-customize]
  '(menu-item "Customize" (lambda () (interactive) (customize-group 'gdb))
              :help "Customize Gdb Graphical Mode options."))
  (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."))
  (define-key menu [sep1]
    '(menu-item "--"))
  (define-key submenu [all-threads]
    '(menu-item "All threads"
                (lambda ()
                  (interactive)
                  (setq gdb-gud-control-all-threads t))
                :help "GUD start/stop commands apply to all threads"
                :button (:radio . gdb-gud-control-all-threads)))
  (define-key submenu [current-thread]
    '(menu-item "Current thread"
                (lambda ()
                  (interactive)
                  (setq gdb-gud-control-all-threads nil))
                :help "GUD start/stop commands apply to current thread only"
                :button (:radio . (not gdb-gud-control-all-threads))))
  (define-key menu [thread-control]
      `("GUD thread control mode" . ,submenu))
  (define-key gud-menu-map [mi]
    `(menu-item "GDB-MI" ,menu :visible (eq gud-minor-mode 'gdbmi)))
  (define-key menu [gdb-switch-when-another-stopped]
    (menu-bar-make-toggle gdb-toggle-switch-when-another-stopped gdb-switch-when-another-stopped
                          "Automatically switch to stopped thread"
                          "GDB thread switching %s"
                          "Switch to stopped thread"))
  (define-key menu [gdb-non-stop]
    (menu-bar-make-toggle gdb-toggle-non-stop gdb-non-stop
                          "Non-stop mode"
                          "GDB non-stop mode %s"
                          "Allow examining stopped threads while others continue to execute")))

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

(defun gdb-display-gdb-buffer ()
  "Display GUD buffer."
  (interactive)
  (let ((same-window-regexps nil))
    (select-window (display-buffer gud-comint-buffer nil 0))))

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

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

(defcustom gdb-many-windows nil
  "If nil 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 debugged program.  Non-nil means display the layout shown for
`gdb'."
  :type 'boolean
  :group 'gdb
  :version "22.1")

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

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

(defun gdb-get-source-file ()
  "Find the source file where the program starts and display it with related
buffers, if required."
  (goto-char (point-min))
  (if (re-search-forward gdb-source-file-regexp nil t)
      (setq gdb-main-file (match-string 1)))
 (if gdb-many-windows
      (gdb-setup-windows)
   (gdb-get-buffer-create 'gdb-breakpoints-buffer)
   (if gdb-show-main
       (let ((pop-up-windows t))
         (display-buffer (gud-find-file gdb-main-file))))))

;;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)))))

(provide 'gdb-mi)

;; arch-tag: 1b41ea2b-f364-4cec-8f35-e02e4fe01912
;;; gdb-mi.el ends here