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Diffstat (limited to 'gdb/gdba.el')
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diff --git a/gdb/gdba.el b/gdb/gdba.el new file mode 100644 index 0000000..6fc7d6a --- /dev/null +++ b/gdb/gdba.el @@ -0,0 +1,1798 @@ +(defmacro gud (form) + (` (save-excursion (set-buffer "*gud-a.out*") (, form)))) + +(defun dbug (foo &optional fun) + (save-excursion + (set-buffer (get-buffer-create "*trace*")) + (goto-char (point-max)) + (insert "***" (symbol-name foo) "\n") + (if fun + (funcall fun)))) + + +;;; gud.el --- Grand Unified Debugger mode for gdb, sdb, dbx, or xdb +;;; under Emacs + +;; Author: Eric S. Raymond <esr@snark.thyrsus.com> +;; Maintainer: FSF +;; Version: 1.3 +;; Keywords: unix, tools + +;; Copyright (C) 1992, 1993 Free Software Foundation, Inc. + +;; This file is part of GNU Emacs. + +;; GNU Emacs is free software; you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation; either version 2, or (at your option) +;; any later version. + +;; GNU Emacs is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. + +;; You should have received a copy of the GNU General Public License +;; along with GNU Emacs; see the file COPYING. If not, write to +;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + +;;; Commentary: + +;; The ancestral gdb.el was by W. Schelter <wfs@rascal.ics.utexas.edu> +;; It was later rewritten by rms. Some ideas were due to Masanobu. +;; Grand Unification (sdb/dbx support) by Eric S. Raymond <esr@thyrsus.com> +;; The overloading code was then rewritten by Barry Warsaw <bwarsaw@cen.com>, +;; who also hacked the mode to use comint.el. Shane Hartman <shane@spr.com> +;; added support for xdb (HPUX debugger). + +;; Jim Kingdon added support for ^Z^Z^Z annotations. + +;;; Code: + +(require 'comint) +(require 'etags) + +;; ====================================================================== +;; GUD commands must be visible in C buffers visited by GUD + +(defvar gud-key-prefix "\C-x\C-a" + "Prefix of all GUD commands valid in C buffers.") + +(global-set-key (concat gud-key-prefix "\C-l") 'gud-refresh) +(global-set-key "\C-x " 'gud-break) ;; backward compatibility hack + +;; ====================================================================== +;; the overloading mechanism + +(defun gud-overload-functions (gud-overload-alist) + "Overload functions defined in GUD-OVERLOAD-ALIST. +This association list has elements of the form + (ORIGINAL-FUNCTION-NAME OVERLOAD-FUNCTION)" + (mapcar + (function (lambda (p) (fset (car p) (symbol-function (cdr p))))) + gud-overload-alist)) + +(defun gud-massage-args (file args) + (error "GUD not properly entered.")) + +(defun gud-marker-filter (str) + (error "GUD not properly entered.")) + +(defun gud-find-file (f) + (error "GUD not properly entered.")) + +;; ====================================================================== +;; command definition + +;; This macro is used below to define some basic debugger interface commands. +;; Of course you may use `gud-def' with any other debugger command, including +;; user defined ones. + +;; A macro call like (gud-def FUNC NAME KEY DOC) expands to a form +;; which defines FUNC to send the command NAME to the debugger, gives +;; it the docstring DOC, and binds that function to KEY in the GUD +;; major mode. The function is also bound in the global keymap with the +;; GUD prefix. + +(defmacro gud-def (func cmd key &optional doc) + "Define FUNC to be a command sending STR and bound to KEY, with +optional doc string DOC. Certain %-escapes in the string arguments +are interpreted specially if present. These are: + + %f name (without directory) of current source file. + %d directory of current source file. + %l number of current source line + %e text of the C lvalue or function-call expression surrounding point. + %a text of the hexadecimal address surrounding point + %p prefix argument to the command (if any) as a number + + The `current' source file is the file of the current buffer (if +we're in a C file) or the source file current at the last break or +step (if we're in the GUD buffer). + The `current' line is that of the current buffer (if we're in a +source file) or the source line number at the last break or step (if +we're in the GUD buffer)." + (list 'progn + (list 'defun func '(arg) + (or doc "") + '(interactive "p") + (list 'gud-call cmd 'arg)) + (if key + (list 'define-key + '(current-local-map) + (concat "\C-c" key) + (list 'quote func))) + (if key + (list 'global-set-key + (list 'concat 'gud-key-prefix key) + (list 'quote func))))) + +;; Where gud-display-frame should put the debugging arrow. This is +;; set by the marker-filter, which scans the debugger's output for +;; indications of the current program counter. +(defvar gud-last-frame nil) + +;; Used by gud-refresh, which should cause gud-display-frame to redisplay +;; the last frame, even if it's been called before and gud-last-frame has +;; been set to nil. +(defvar gud-last-last-frame nil) + +;; All debugger-specific information is collected here. +;; Here's how it works, in case you ever need to add a debugger to the mode. +;; +;; Each entry must define the following at startup: +;; +;;<name> +;; comint-prompt-regexp +;; gud-<name>-massage-args +;; gud-<name>-marker-filter +;; gud-<name>-find-file +;; +;; The job of the massage-args method is to modify the given list of +;; debugger arguments before running the debugger. +;; +;; The job of the marker-filter method is to detect file/line markers in +;; strings and set the global gud-last-frame to indicate what display +;; action (if any) should be triggered by the marker. Note that only +;; whatever the method *returns* is displayed in the buffer; thus, you +;; can filter the debugger's output, interpreting some and passing on +;; the rest. +;; +;; The job of the find-file method is to visit and return the buffer indicated +;; by the car of gud-tag-frame. This may be a file name, a tag name, or +;; something else. + +;; ====================================================================== +;; gdb functions + +;;; History of argument lists passed to gdb. +(defvar gud-gdb-history nil) + +(defun gud-gdb-massage-args (file args) + (cons "-annotate=2" (cons file args))) + + +;; +;; In this world, there are gdb instance objects (of unspecified +;; representation) and buffers associated with those objects. +;; + +;; +;; gdb-instance objects +;; + +(defun make-gdb-instance (proc) + "Create a gdb instance object from a gdb process." + (let ((instance (cons 'gdb-instance proc))) + (save-excursion + (set-buffer (process-buffer proc)) + (if (not (equal gdb-buffer-instance instance)) + (progn + (mapcar 'make-variable-buffer-local gdb-instance-variables) + (setq gdb-buffer-instance instance) ; These are both... + (setq gdb-buffer-type 'gud)))) ; ...instance variables + instance)) + +(defun gdb-instance-process (inst) (cdr inst)) + +(defvar gdb-instance-variables '() + "A list of variables that are local to the gud buffer associated +with a gdb instance.") + +(defmacro def-gdb-variable + (name accessor setter &optional default doc) + (` + (progn + (defvar (, name) (, default) (, (or doc "undocumented"))) + (if (not (memq '(, name) gdb-instance-variables)) + (setq gdb-instance-variables + (cons '(, name) gdb-instance-variables))) + (, (and accessor + (` + (defun (, accessor) (instance) + (let + ((buffer (gdb-get-instance-buffer instance 'gud))) + (and buffer + (save-excursion + (set-buffer buffer) + (, name)))))))) + (, (and setter + (` + (defun (, setter) (instance val) + (let + ((buffer (gdb-get-instance-buffer instance 'gud))) + (and buffer + (save-excursion + (set-buffer buffer) + (setq (, name) val))))))))))) + +(defmacro def-gdb-var (root-symbol &optional default doc) + (let* ((root (symbol-name root-symbol)) + (accessor (intern (concat "gdb-instance-" root))) + (setter (intern (concat "set-gdb-instance-" root))) + (var-name (intern (concat "gdb-" root)))) + (` (def-gdb-variable + (, var-name) (, accessor) (, setter) + (, default) (, doc))))) + +(def-gdb-var buffer-instance nil + "In an instance buffer, the buffer's instance.") + +(def-gdb-var buffer-type nil + "One of the symbols bound in gdb-instance-buffer-rules") + +(def-gdb-var burst "" + "A string of characters from gdb that have not yet been processed.") + +(def-gdb-var input-queue () + "A list of high priority gdb command objects.") + +(def-gdb-var idle-input-queue () + "A list of low priority gdb command objects.") + +(def-gdb-var prompting nil + "True when gdb is idle with no pending input.") + +(def-gdb-var output-sink 'user + "The disposition of the output of the current gdb command.") + +(def-gdb-var current-item nil + "The most recent command item sent to gdb.") + +(def-gdb-var pending-triggers '() + "A list of trigger functions that have run later than their output +handlers.") + +(defun in-gdb-instance-context (instance form) + "Funcall `form' in the gud buffer of `instance'" + (save-excursion + (set-buffer (gdb-get-instance-buffer instance 'gud)) + (funcall form))) + +;; end of instance vars + +;; +;; finding instances +;; + +(defun gdb-proc->instance (proc) + (save-excursion + (set-buffer (process-buffer proc)) + gdb-buffer-instance)) + +(defun gdb-mru-instance-buffer () + "Return the most recently used (non-auxiliary) gdb gud buffer." + (save-excursion + (gdb-goto-first-gdb-instance (buffer-list)))) + +(defun gdb-goto-first-gdb-instance (blist) + "Use gdb-mru-instance-buffer -- not this." + (and blist + (progn + (set-buffer (car blist)) + (or (and gdb-buffer-instance + (eq gdb-buffer-type 'gud) + (car blist)) + (gdb-find-first-gdb-instance (cdr blist)))))) + +(defun buffer-gdb-instance (buf) + (save-excursion + (set-buffer buf) + gdb-buffer-instance)) + +(defun gdb-needed-default-instance () + "Return the most recently used gdb instance or signal an error." + (let ((buffer (gdb-mru-instance-buffer))) + (or (and buffer (buffer-gdb-instance buffer)) + (error "No instance of gdb found.")))) + +(defun gdb-instance-target-string (instance) + "The apparent name of the program being debugged by a gdb instance. +For sure this the root string used in smashing together the gud +buffer's name, even if that doesn't happen to be the name of a +program." + (in-gdb-instance-context + instance + (function (lambda () gud-target-name)))) + +;; More than one buffer can be associated with a gdb instance. +;; +;; Each buffer has a TYPE -- an atom that identifies the function +;; of that particular buffer. +;; +;; The usual gud interaction buffer is given the type `gud' and +;; is constructed specially. +;; +;; Others are constructed by gdb-get-create-instance-buffer and +;; named according to the rules set forth here: +;; + +(defvar gdb-instance-buffer-rules-assoc + '((gud error) ; gud buffers construct specially + (gdb-partial-output-buffer + gdb-partial-output-name + ) + (gdb-registers-buffer + gdb-registers-buffer-name) + (gdb-breakpoints-buffer + gdb-breakpoints-buffer-name) + (gdb-frames-buffer + gdb-frames-buffer-name))) + + +;; +;; gdb communications +;; + +;; input: things sent to gdb +;; +;; Each instance has a high and low priority +;; input queue. Low priority input is sent only +;; when the high priority queue is idle. +;; +;; The queues are lists. Each element is either +;; a string (indicating user or user-like input) +;; or a list of the form: +;; +;; (INPUT-STRING HANDLER-FN) +;; +;; +;; The handler function will be called from the +;; partial-output buffer when the command completes. +;; +;; These lists are consumed tail first. +;; + +(defun gdb-send (proc string) + "A comint send filter for gdb. +This filter may simply queue output for a later time." + (let ((instance (gdb-proc->instance proc))) + (gdb-instance-enqueue-input instance (concat string "\n")))) + +(defun gdb-instance-enqueue-input (instance item) + "Enqueue an input item (a string or a list) for a gdb instance." + (if (gdb-instance-prompting instance) + (progn + (gdb-send-item instance item) + (set-gdb-instance-prompting instance nil)) + (set-gdb-instance-input-queue + instance + (cons item (gdb-instance-input-queue instance))))) + +(defun gdb-instance-dequeue-input (instance) + (let ((queue (gdb-instance-input-queue instance))) + (and queue + (if (not (cdr queue)) + (let ((answer (car queue))) + (set-gdb-instance-input-queue instance '()) + answer) + (gdb-take-last-elt queue))))) + +(defun gdb-instance-enqueue-idle-input (instance item) + "Enqueue idle input (a string or a list) for a gdb instance." + (if (gdb-instance-prompting instance) + (progn + (gdb-send-item instance item) + (set-gdb-instance-prompting instance nil)) + (set-gdb-instance-idle-input-queue + instance + (cons item (gdb-instance-idle-input-queue instance))))) + +(defun gdb-instance-dequeue-idle-input (instance) + (let ((queue (gdb-instance-idle-input-queue instance))) + (and queue + (if (not (cdr queue)) + (let ((answer (car queue))) + (set-gdb-instance-idle-input-queue instance '()) + answer) + (gdb-take-last-elt queue))))) + +(defun gdb-take-last-elt (l) + "Don't use this in general." + (if (cdr (cdr l)) + (gdb-take-last-elt (cdr l)) + (let ((answer (car (cdr l)))) + (setcdr l '()) + answer))) + + +;; +;; output -- things gdb prints to emacs +;; +;; GDB output is a stream interrupted by annotations. +;; Annotations can be recognized by their beginning +;; with \C-j\C-z\C-z<tag><opt>\C-j +;; +;; The tag is a string obeying symbol syntax. +;; +;; The optional part `<opt>' can be either the empty string +;; or a space followed by more data relating to the annotation. +;; For example, the SOURCE annotation is followed by a filename, +;; line number and various useless goo. This data must not include +;; any newlines. +;; + + +(defun gud-gdb-marker-filter (string) + "A gud marker filter for gdb." + ;; Bogons don't tell us the process except through scoping crud. + (let ((instance (gdb-proc->instance proc))) + (gdb-output-burst instance string))) + +(defvar gdb-annotation-rules + '(("frames-invalid" gdb-invalidate-frames) + ("breakpoints-invalid" gdb-invalidate-breakpoints) + ("pre-prompt" gdb-pre-prompt) + ("prompt" gdb-prompt) + ("post-prompt" gdb-post-prompt) + ("source" gdb-source) + ("value-history-begin" gdb-ignore-annotation) + ("value-history-end" gdb-ignore-annotation) + ("arg-name-begin" gdb-ignore-annotation) + ("arg-name-end" gdb-ignore-annotation) + ("field-name-begin" gdb-ignore-annotation) + ("field-name-end" gdb-ignore-annotation) + ("field-begin" gdb-ignore-annotation) + ("field-end" gdb-ignore-annotation) + ("array-element-begin" gdb-ignore-annotation) + ("array-element-end" gdb-ignore-annotation)) + "An assoc mapping annotation tags to functions which process them.") + + +(defun gdb-ignore-annotation (instance args) + nil) + +(defconst gdb-source-spec-regexp + "\\(.*\\):\\([0-9]*\\):[0-9]*:[a-z]*:0x[a-f0-9]*") + +(defun gdb-source (instance args) + "Do not use this except as an annotation handler." + (string-match gdb-source-spec-regexp args) + ;; Extract the frame position from the marker. + (setq gud-last-frame + (cons + (substring args (match-beginning 1) (match-end 1)) + (string-to-int (substring args + (match-beginning 2) + (match-end 2)))))) + +(defun gdb-prompt (instance ignored) + "An annotation handler for `prompt'. +This sends the next command (if any) to gdb." + (let ((sink (gdb-instance-output-sink instance))) + (cond + ((eq sink 'user) t) + ((eq sink 'post-emacs) + (set-gdb-instance-output-sink instance 'user)) + ((or (eq sink 'emacs) + (eq sink 'pre-emacs)) + (set-gdb-instance-output-sink instance 'user) + (error "Phase error in gdb-prompt (got %s)" sink)) + (t (set-gdb-instance-output-sink instance 'user)))) + (let ((highest (gdb-instance-dequeue-input instance))) + (if highest + (gdb-send-item instance highest) + (let ((lowest (gdb-instance-dequeue-idle-input instance))) + (if lowest + (gdb-send-item instance lowest) + (set-gdb-instance-prompting instance t)))))) + +(defun gdb-send-item (instance item) + (dbug 'sending + (function + (lambda () + (insert (format "%s\n" item))))) + (set-gdb-instance-current-item instance item) + (if (stringp item) + (progn + (set-gdb-instance-output-sink instance 'user) + (process-send-string (gdb-instance-process instance) + item)) + (progn + (gdb-clear-partial-output instance) + (set-gdb-instance-output-sink instance 'pre-emacs) + (process-send-string (gdb-instance-process instance) + (car item))))) + +(defun gdb-pre-prompt (instance ignored) + "An annotation handler for `pre-prompt'. +This terminates the collection of output from a previous +command if that happens to be in effect." + (let ((sink (gdb-instance-output-sink instance))) + (cond + ((eq sink 'user) t) + ((eq sink 'emacs) + (set-gdb-instance-output-sink instance 'post-emacs) + (let ((handler + (car (cdr (gdb-instance-current-item instance))))) + (save-excursion + (set-buffer (gdb-get-create-instance-buffer + instance 'gdb-partial-output-buffer)) + (funcall handler)))) + ((eq sink 'pre-emacs) + (set-gdb-instance-output-sink instance 'user) + (error "Output sink phase error 1.")) + ((eq sink 'post-emacs) + (set-gdb-instance-output-sink instance 'user) + (error "Output sink phase error 2."))))) + +(defun gdb-post-prompt (instance ignored) + "An annotation handler for `pre-prompt'. +This begins the collection of output from the current +command if that happens to be appropriate." + (gdb-invalidate-registers instance ignored) + (let ((sink (gdb-instance-output-sink instance))) + (cond + ((eq sink 'user) t) + ((eq sink 'pre-emacs) + (set-gdb-instance-output-sink instance 'emacs)) + + ((eq sink 'emacs) + (set-gdb-instance-output-sink instance 'user) + (error "Output sink phase error 3.")) + + ((eq sink 'post-emacs) + (set-gdb-instance-output-sink instance 'user) + (error "Output sink phase error 3."))))) + + +(defmacro def-gdb-auto-update-trigger (name demand-predicate gdb-command output-handler) + (` + (defun (, name) (instance ignored) + (if (and ((, demand-predicate) instance) + (not (member '(, name) + (gdb-instance-pending-triggers instance)))) + (progn + (gdb-instance-enqueue-idle-input + instance + (list (, gdb-command) '(, output-handler))) + (set-gdb-instance-pending-triggers + instance + (cons '(, name) + (gdb-instance-pending-triggers instance)))))))) + +(defmacro def-gdb-auto-update-handler (name trigger buf-key) + (` + (defun (, name) () + (set-gdb-instance-pending-triggers + instance + (delq '(, trigger) + (gdb-instance-pending-triggers instance))) + (let ((buf (gdb-get-instance-buffer instance + '(, buf-key)))) + (and buf + (save-excursion + (set-buffer buf) + (let ((p (point))) + (kill-region (point-min) (point-max)) + (insert-buffer (gdb-get-create-instance-buffer + instance + 'gdb-partial-output-buffer)) + (goto-char p)))))))) + +(defmacro def-gdb-auto-updated-buffer + (buffer-key trigger-name gdb-command output-handler-name) + (` + (progn + (def-gdb-auto-update-trigger (, trigger-name) + ;; The demand predicate: + (lambda (instance) + (gdb-get-instance-buffer instance '(, buffer-key))) + (, gdb-command) + (, output-handler-name)) + (def-gdb-auto-update-handler (, output-handler-name) + (, trigger-name) (, buffer-key))))) + + + +(def-gdb-auto-updated-buffer gdb-breakpoints-buffer + ;; This defines the auto update rule for buffers of type + ;; `gdb-breakpoints-buffer'. + ;; + ;; It defines a function to serve as the annotation handler that + ;; handles the `foo-invalidated' message. That function is called: + gdb-invalidate-breakpoints + + ;; To update the buffer, this command is sent to gdb. + "server info breakpoints\n" + + ;; This also defines a function to be the handler for the output + ;; from the command above. That function will copy the output into + ;; the appropriately typed buffer. That function will be called: + gdb-info-breakpoints-handler) + +(def-gdb-auto-updated-buffer gdb-frames-buffer + gdb-invalidate-frames + "server where\n" + gdb-info-frames-handler) + + +(def-gdb-auto-updated-buffer gdb-registers-buffer + gdb-invalidate-registers + "server info registers\n" + gdb-info-registers-handler) + +;; +;; At any given time, output from gdb is being directed +;; one of three places. By default, it goes into the gdb +;; interaction buffer. For commands executed on behalf +;; of emacs, it goes into a scratch buffer (not `the'). +;; Finally, some gdb output is simply thrown away; for example, +;; the prompt that follows output from a command executed +;; for emacs. +;; + +(defvar gdb-output-sink 'user + "An buffer-local indication of how output from an inferior gdb +should be directed. Legit values are: + + USER -- the output should be appended to the gud + buffer. + + PRE-EMACS -- throw away output preceding output for emacs. + EMACS -- redirect output to the partial-output buffer. + POST-EMACS -- throw away output following output for emacs.") + +(defun gdb-output-burst (instance string) + "Handle a burst of output from a gdb instance. +This function is (indirectly) used as a gud-marker-filter. +It must return output (if any) to be insterted in the gud +buffer." + + (save-match-data + (let ( + ;; Recall the left over burst from last time + (burst (concat (gdb-instance-burst instance) string)) + ;; Start accumulating output for the gud buffer + (output "")) + + ;; Process all the complete markers in this chunk. + + (while (string-match "\n\032\032\\(.*\\)\n" burst) + (let ((annotation (substring burst + (match-beginning 1) + (match-end 1)))) + + ;; Stuff prior to the match is just ordinary output. + ;; It is either concatenated to OUTPUT or directed + ;; elsewhere. + (setq output + (gdb-concat-output + instance + output + (substring burst 0 (match-beginning 0)))) + + ;; Take that stuff off the burst. + (setq burst (substring burst (match-end 0))) + + ;; Parse the tag from the annotation, and maybe its arguments. + (string-match "\\(\\S-*\\) ?\\(.*\\)" annotation) + (let* ((annotation-type (substring annotation + (match-beginning 1) + (match-end 1))) + (annotation-arguments (substring annotation + (match-beginning 2) + (match-end 2))) + (annotation-rule (assoc annotation-type + gdb-annotation-rules))) + ;; Call the handler for this annotation. + (dbug 'annotation + '(lambda () (insert annotation-type "\n"))) + (if annotation-rule + (funcall (car (cdr annotation-rule)) + instance + annotation-arguments) + (error "Bogon gdb annotation %s." annotation))))) + + + ;; Does the remaining text end in a partial line? + ;; If it does, then keep part of the burst until we get more. + (if (string-match "\n\\'\\|\n\032\\'\\|\n\032\032.*\\'" + burst) + (progn + ;; Everything before the potential marker start can be output. + (setq output + (gdb-concat-output + instance + output + (substring burst 0 (match-beginning 0)))) + + ;; Everything after, we save, to combine with later input. + (setq burst (substring burst (match-beginning 0)))) + + ;; In case we know the burst contains no partial annotations: + (progn + (setq output (gdb-concat-output instance output burst)) + (setq burst ""))) + + ;; Save the remaining burst for the next call to this function. + (set-gdb-instance-burst instance burst) + output))) + +(defun gdb-concat-output (instance so-far new) + (let ((sink (gdb-instance-output-sink instance))) + (cond + ((eq sink 'user) (concat so-far new)) + ((or (eq sink 'pre-emacs) (eq sink 'post-emacs)) so-far) + ((eq sink 'emacs) + (gdb-append-to-partial-output instance new) + so-far) + (t (error "Bogon output sink %d" sink))))) + +(defun gdb-append-to-partial-output (instance string) + (save-excursion + (set-buffer + (gdb-get-create-instance-buffer + instance 'gdb-partial-output-buffer)) + (goto-char (point-max)) + (insert string))) + +(defun gdb-clear-partial-output (instance) + (save-excursion + (set-buffer + (gdb-get-create-instance-buffer + instance 'gdb-partial-output-buffer)) + (kill-region (point-min) (point-max)))) + +;; +;; Instance Buffers. +;; +;; These are buffers that display output from gdb (or other +;; information) that we want to filter out from the general gdb +;; interaction buffer. (e.g. the backtrace buffer). +;; +;; The general pattern is that each kind of buffer is associated +;; with a rule to refresh its contents. The rule includes one +;; function to call when it is noticed that the buffer is out of +;; date. Typically, that will queue up an idle command for gdb. +;; +;; Every type of instance buffer is identified by some atom +;; such as gdb-frames-buffer. An instance and one of these +;; atoms uniquely identifies a particular instance buffer. +;; + +(defun gdb-get-instance-buffer (instance key) + "Return the instance buffer for `instance' tagged with type `key'. +The key should be one of the cars in `gdb-instance-buffer-rules-assoc'." + (save-excursion + (gdb-look-for-tagged-buffer instance key (buffer-list)))) + +(defun gdb-get-create-instance-buffer (instance key) + "Create a new gdb instance buffer of the type specified by `key'. +The key should be one of the cars in `gdb-instance-buffer-rules-assoc'." + (or (gdb-get-instance-buffer instance key) + (let* ((rules (assoc key gdb-instance-buffer-rules-assoc)) + (name (funcall (gdb-rules-name-maker rules) instance)) + (new (get-buffer-create name))) + (save-excursion + (set-buffer new) + (make-variable-buffer-local 'gdb-buffer-type) + (setq gdb-buffer-type key) + (make-variable-buffer-local 'gdb-buffer-instance) + (setq gdb-buffer-instance instance) + new)))) + +(defun gdb-rules-name-maker (rules) (car (cdr rules))) + +(defun gdb-look-for-tagged-buffer (instance key bufs) + (and bufs + (set-buffer (car bufs)) + (or (and (eq gdb-buffer-instance instance) + (eq gdb-buffer-type key) + (car bufs)) + (gdb-look-for-tagged-buffer instance key (cdr bufs))))) + +(defun gdb-instance-buffer-p (buf) + (save-excursion + (set-buffer buf) + (and gdb-buffer-type + (not (eq gdb-buffer-type 'gud))))) + +;; +;; partial-output buffers +;; +;; These accumulate output from a command executed on +;; behalf of emacs (rather than the user). When the +;; output is complete, the hooks bound to `gdb-command-complete-hooks' +;; are called (and then cleared). Usually these hooks are not +;; set directly but rather implicitly according to the +;; instance-buffer rules. +;; + +(defun gdb-partial-output-name (instance) + (concat "*partial-output-" + (gdb-instance-target-string instance) + "*")) + +;; +;; Backtrace buffers +;; + +(defun gdb-frames-buffer-name (instance) + (save-excursion + (set-buffer (process-buffer (gdb-instance-process instance))) + (concat "*stack frames of " + (gdb-instance-target-string instance) "*"))) + +(defun gud-display-frames-buffer (instance) + (interactive (list (gdb-needed-default-instance))) + (display-buffer + (gdb-get-create-instance-buffer instance + 'gdb-frames-buffer))) + +;; +;; Breakpoint buffers +;; + +(defun gdb-breakpoints-buffer-name (instance) + (save-excursion + (set-buffer (process-buffer (gdb-instance-process instance))) + (concat "*breakpoints of " (gdb-instance-target-string instance) "*"))) + +(defun gud-display-breakpoints-buffer (instance) + (interactive (list (gdb-needed-default-instance))) + (display-buffer + (gdb-get-create-instance-buffer instance + 'gdb-breakpoints-buffer))) + + +;; +;; Registers buffers +;; + +(defun gdb-registers-buffer-name (instance) + (save-excursion + (set-buffer (process-buffer (gdb-instance-process instance))) + (concat "*registers of " (gdb-instance-target-string instance) "*"))) + +(defun gud-display-registers-buffer (instance) + (interactive (list (gdb-needed-default-instance))) + (display-buffer + (gdb-get-create-instance-buffer instance + 'gdb-registers-buffer))) + + + + +(defun gud-gdb-find-file (f) + (find-file-noselect f)) + +;;;###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." + (interactive + (list (read-from-minibuffer "Run gdb (like this): " + (if (consp gud-gdb-history) + (car gud-gdb-history) + "/offsite/kingdon/devo/s4/gdb/gdb ") + nil nil + '(gud-gdb-history . 1)))) + (gud-overload-functions + '((gud-massage-args . gud-gdb-massage-args) + (gud-marker-filter . gud-gdb-marker-filter) + (gud-find-file . gud-gdb-find-file) + )) + + (gud-common-init command-line) + + (gud-def gud-break "break %f:%l" "\C-b" "Set breakpoint at current line.") + (gud-def gud-tbreak "tbreak %f:%l" "\C-t" "Set breakpoint at current line.") + (gud-def gud-remove "clear %l" "\C-d" "Remove breakpoint at current line") + (gud-def gud-step "step %p" "\C-s" "Step one source line with display.") + (gud-def gud-stepi "stepi %p" "\C-i" "Step one instruction with display.") + (gud-def gud-next "next %p" "\C-n" "Step one line (skip functions).") + (gud-def gud-cont "cont" "\C-r" "Continue with display.") + (gud-def gud-finish "finish" "\C-f" "Finish executing current function.") + (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.") + + (setq comint-prompt-regexp "^(.*gdb[+]?) *") + (setq comint-input-sender 'gdb-send) + (run-hooks 'gdb-mode-hook) + (make-gdb-instance (get-buffer-process (current-buffer))) + ) + + +;; ====================================================================== +;; sdb functions + +;;; History of argument lists passed to sdb. +(defvar gud-sdb-history nil) + +(defvar gud-sdb-needs-tags (not (file-exists-p "/var")) + "If nil, we're on a System V Release 4 and don't need the tags hack.") + +(defvar gud-sdb-lastfile nil) + +(defun gud-sdb-massage-args (file args) + (cons file args)) + +(defun gud-sdb-marker-filter (string) + (cond + ;; System V Release 3.2 uses this format + ((string-match "\\(^0x\\w* in \\|^\\|\n\\)\\([^:\n]*\\):\\([0-9]*\\):.*\n" + string) + (setq gud-last-frame + (cons + (substring string (match-beginning 2) (match-end 2)) + (string-to-int + (substring string (match-beginning 3) (match-end 3)))))) + ;; System V Release 4.0 + ((string-match "^\\(BREAKPOINT\\|STEPPED\\) process [0-9]+ function [^ ]+ in \\(.+\\)\n" + string) + (setq gud-sdb-lastfile + (substring string (match-beginning 2) (match-end 2)))) + ((and gud-sdb-lastfile (string-match "^\\([0-9]+\\):" string)) + (setq gud-last-frame + (cons + gud-sdb-lastfile + (string-to-int + (substring string (match-beginning 1) (match-end 1)))))) + (t + (setq gud-sdb-lastfile nil))) + string) + +(defun gud-sdb-find-file (f) + (if gud-sdb-needs-tags + (find-tag-noselect f) + (find-file-noselect f))) + +;;;###autoload +(defun sdb (command-line) + "Run sdb on program FILE in buffer *gud-FILE*. +The directory containing FILE becomes the initial working directory +and source-file directory for your debugger." + (interactive + (list (read-from-minibuffer "Run sdb (like this): " + (if (consp gud-sdb-history) + (car gud-sdb-history) + "sdb ") + nil nil + '(gud-sdb-history . 1)))) + (if (and gud-sdb-needs-tags + (not (and (boundp 'tags-file-name) (file-exists-p tags-file-name)))) + (error "The sdb support requires a valid tags table to work.")) + (gud-overload-functions '((gud-massage-args . gud-sdb-massage-args) + (gud-marker-filter . gud-sdb-marker-filter) + (gud-find-file . gud-sdb-find-file) + )) + + (gud-common-init command-line) + + (gud-def gud-break "%l b" "\C-b" "Set breakpoint at current line.") + (gud-def gud-tbreak "%l c" "\C-t" "Set temporary breakpoint at current line.") + (gud-def gud-remove "%l d" "\C-d" "Remove breakpoint at current line") + (gud-def gud-step "s %p" "\C-s" "Step one source line with display.") + (gud-def gud-stepi "i %p" "\C-i" "Step one instruction with display.") + (gud-def gud-next "S %p" "\C-n" "Step one line (skip functions).") + (gud-def gud-cont "c" "\C-r" "Continue with display.") + (gud-def gud-print "%e/" "\C-p" "Evaluate C expression at point.") + + (setq comint-prompt-regexp "\\(^\\|\n\\)\\*") + (run-hooks 'sdb-mode-hook) + ) + +;; ====================================================================== +;; dbx functions + +;;; History of argument lists passed to dbx. +(defvar gud-dbx-history nil) + +(defun gud-dbx-massage-args (file args) + (cons file args)) + +(defun gud-dbx-marker-filter (string) + (if (or (string-match + "stopped in .* at line \\([0-9]*\\) in file \"\\([^\"]*\\)\"" + string) + (string-match + "signal .* in .* at line \\([0-9]*\\) in file \"\\([^\"]*\\)\"" + string)) + (setq gud-last-frame + (cons + (substring string (match-beginning 2) (match-end 2)) + (string-to-int + (substring string (match-beginning 1) (match-end 1)))))) + string) + +(defun gud-dbx-find-file (f) + (find-file-noselect f)) + +;;;###autoload +(defun dbx (command-line) + "Run dbx on program FILE in buffer *gud-FILE*. +The directory containing FILE becomes the initial working directory +and source-file directory for your debugger." + (interactive + (list (read-from-minibuffer "Run dbx (like this): " + (if (consp gud-dbx-history) + (car gud-dbx-history) + "dbx ") + nil nil + '(gud-dbx-history . 1)))) + (gud-overload-functions '((gud-massage-args . gud-dbx-massage-args) + (gud-marker-filter . gud-dbx-marker-filter) + (gud-find-file . gud-dbx-find-file) + )) + + (gud-common-init command-line) + + (gud-def gud-break "file \"%d%f\"\nstop at %l" + "\C-b" "Set breakpoint at current line.") +;; (gud-def gud-break "stop at \"%f\":%l" +;; "\C-b" "Set breakpoint at current line.") + (gud-def gud-remove "clear %l" "\C-d" "Remove breakpoint at current line") + (gud-def gud-step "step %p" "\C-s" "Step one line with display.") + (gud-def gud-stepi "stepi %p" "\C-i" "Step one instruction with display.") + (gud-def gud-next "next %p" "\C-n" "Step one line (skip functions).") + (gud-def gud-cont "cont" "\C-r" "Continue with display.") + (gud-def gud-up "up %p" "<" "Up (numeric arg) stack frames.") + (gud-def gud-down "down %p" ">" "Down (numeric arg) stack frames.") + (gud-def gud-print "print %e" "\C-p" "Evaluate C expression at point.") + + (setq comint-prompt-regexp "^[^)]*dbx) *") + (run-hooks 'dbx-mode-hook) + ) + +;; ====================================================================== +;; xdb (HP PARISC debugger) functions + +;;; History of argument lists passed to xdb. +(defvar gud-xdb-history nil) + +(defvar gud-xdb-directories nil + "*A list of directories that xdb should search for source code. +If nil, only source files in the program directory +will be known to xdb. + +The file names should be absolute, or relative to the directory +containing the executable being debugged.") + +(defun gud-xdb-massage-args (file args) + (nconc (let ((directories gud-xdb-directories) + (result nil)) + (while directories + (setq result (cons (car directories) (cons "-d" result))) + (setq directories (cdr directories))) + (nreverse (cons file result))) + args)) + +(defun gud-xdb-file-name (f) + "Transform a relative pathname to a full pathname in xdb mode" + (let ((result nil)) + (if (file-exists-p f) + (setq result (expand-file-name f)) + (let ((directories gud-xdb-directories)) + (while directories + (let ((path (concat (car directories) "/" f))) + (if (file-exists-p path) + (setq result (expand-file-name path) + directories nil))) + (setq directories (cdr directories))))) + result)) + +;; xdb does not print the lines all at once, so we have to accumulate them +(defvar gud-xdb-accumulation "") + +(defun gud-xdb-marker-filter (string) + (let (result) + (if (or (string-match comint-prompt-regexp string) + (string-match ".*\012" string)) + (setq result (concat gud-xdb-accumulation string) + gud-xdb-accumulation "") + (setq gud-xdb-accumulation (concat gud-xdb-accumulation string))) + (if result + (if (or (string-match "\\([^\n \t:]+\\): [^:]+: \\([0-9]+\\):" result) + (string-match "[^: \t]+:[ \t]+\\([^:]+\\): [^:]+: \\([0-9]+\\):" + result)) + (let ((line (string-to-int + (substring result (match-beginning 2) (match-end 2)))) + (file (gud-xdb-file-name + (substring result (match-beginning 1) (match-end 1))))) + (if file + (setq gud-last-frame (cons file line)))))) + (or result ""))) + +(defun gud-xdb-find-file (f) + (let ((realf (gud-xdb-file-name f))) + (if realf (find-file-noselect realf)))) + +;;;###autoload +(defun xdb (command-line) + "Run xdb on program FILE in buffer *gud-FILE*. +The directory containing FILE becomes the initial working directory +and source-file directory for your debugger. + +You can set the variable 'gud-xdb-directories' to a list of program source +directories if your program contains sources from more than one directory." + (interactive + (list (read-from-minibuffer "Run xdb (like this): " + (if (consp gud-xdb-history) + (car gud-xdb-history) + "xdb ") + nil nil + '(gud-xdb-history . 1)))) + (gud-overload-functions '((gud-massage-args . gud-xdb-massage-args) + (gud-marker-filter . gud-xdb-marker-filter) + (gud-find-file . gud-xdb-find-file))) + + (gud-common-init command-line) + + (gud-def gud-break "b %f:%l" "\C-b" "Set breakpoint at current line.") + (gud-def gud-tbreak "b %f:%l\\t" "\C-t" + "Set temporary breakpoint at current line.") + (gud-def gud-remove "db" "\C-d" "Remove breakpoint at current line") + (gud-def gud-step "s %p" "\C-s" "Step one line with display.") + (gud-def gud-next "S %p" "\C-n" "Step one line (skip functions).") + (gud-def gud-cont "c" "\C-r" "Continue with display.") + (gud-def gud-up "up %p" "<" "Up (numeric arg) stack frames.") + (gud-def gud-down "down %p" ">" "Down (numeric arg) stack frames.") + (gud-def gud-finish "bu\\t" "\C-f" "Finish executing current function.") + (gud-def gud-print "p %e" "\C-p" "Evaluate C expression at point.") + + (setq comint-prompt-regexp "^>") + (make-local-variable 'gud-xdb-accumulation) + (setq gud-xdb-accumulation "") + (run-hooks 'xdb-mode-hook)) + +;; ====================================================================== +;; perldb functions + +;;; History of argument lists passed to perldb. +(defvar gud-perldb-history nil) + +(defun gud-perldb-massage-args (file args) + (cons "-d" (cons file (cons "-emacs" args)))) + +;; There's no guarantee that Emacs will hand the filter the entire +;; marker at once; it could be broken up across several strings. We +;; might even receive a big chunk with several markers in it. If we +;; receive a chunk of text which looks like it might contain the +;; beginning of a marker, we save it here between calls to the +;; filter. +(defvar gud-perldb-marker-acc "") + +(defun gud-perldb-marker-filter (string) + (save-match-data + (setq gud-perldb-marker-acc (concat gud-perldb-marker-acc string)) + (let ((output "")) + + ;; Process all the complete markers in this chunk. + (while (string-match "^\032\032\\([^:\n]*\\):\\([0-9]*\\):.*\n" + gud-perldb-marker-acc) + (setq + + ;; Extract the frame position from the marker. + gud-last-frame + (cons (substring gud-perldb-marker-acc (match-beginning 1) (match-end 1)) + (string-to-int (substring gud-perldb-marker-acc + (match-beginning 2) + (match-end 2)))) + + ;; Append any text before the marker to the output we're going + ;; to return - we don't include the marker in this text. + output (concat output + (substring gud-perldb-marker-acc 0 (match-beginning 0))) + + ;; Set the accumulator to the remaining text. + gud-perldb-marker-acc (substring gud-perldb-marker-acc (match-end 0)))) + + ;; Does the remaining text look like it might end with the + ;; beginning of another marker? If it does, then keep it in + ;; gud-perldb-marker-acc until we receive the rest of it. Since we + ;; know the full marker regexp above failed, it's pretty simple to + ;; test for marker starts. + (if (string-match "^\032.*\\'" gud-perldb-marker-acc) + (progn + ;; Everything before the potential marker start can be output. + (setq output (concat output (substring gud-perldb-marker-acc + 0 (match-beginning 0)))) + + ;; Everything after, we save, to combine with later input. + (setq gud-perldb-marker-acc + (substring gud-perldb-marker-acc (match-beginning 0)))) + + (setq output (concat output gud-perldb-marker-acc) + gud-perldb-marker-acc "")) + + output))) + +(defun gud-perldb-find-file (f) + (find-file-noselect f)) + +;;;###autoload +(defun perldb (command-line) + "Run perldb on program FILE in buffer *gud-FILE*. +The directory containing FILE becomes the initial working directory +and source-file directory for your debugger." + (interactive + (list (read-from-minibuffer "Run perldb (like this): " + (if (consp gud-perldb-history) + (car gud-perldb-history) + "perl ") + nil nil + '(gud-perldb-history . 1)))) + (gud-overload-functions '((gud-massage-args . gud-perldb-massage-args) + (gud-marker-filter . gud-perldb-marker-filter) + (gud-find-file . gud-perldb-find-file) + )) + + (gud-common-init command-line) + + (gud-def gud-break "b %l" "\C-b" "Set breakpoint at current line.") + (gud-def gud-remove "d %l" "\C-d" "Remove breakpoint at current line") + (gud-def gud-step "s" "\C-s" "Step one source line with display.") + (gud-def gud-next "n" "\C-n" "Step one line (skip functions).") + (gud-def gud-cont "c" "\C-r" "Continue with display.") +; (gud-def gud-finish "finish" "\C-f" "Finish executing current function.") +; (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 "%e" "\C-p" "Evaluate perl expression at point.") + + (setq comint-prompt-regexp "^ DB<[0-9]+> ") + (run-hooks 'perldb-mode-hook) + ) + +;; +;; End of debugger-specific information +;; + + +;;; When we send a command to the debugger via gud-call, it's annoying +;;; to see the command and the new prompt inserted into the debugger's +;;; buffer; we have other ways of knowing the command has completed. +;;; +;;; If the buffer looks like this: +;;; -------------------- +;;; (gdb) set args foo bar +;;; (gdb) -!- +;;; -------------------- +;;; (the -!- marks the location of point), and we type `C-x SPC' in a +;;; source file to set a breakpoint, we want the buffer to end up like +;;; this: +;;; -------------------- +;;; (gdb) set args foo bar +;;; Breakpoint 1 at 0x92: file make-docfile.c, line 49. +;;; (gdb) -!- +;;; -------------------- +;;; Essentially, the old prompt is deleted, and the command's output +;;; and the new prompt take its place. +;;; +;;; Not echoing the command is easy enough; you send it directly using +;;; process-send-string, and it never enters the buffer. However, +;;; getting rid of the old prompt is trickier; you don't want to do it +;;; when you send the command, since that will result in an annoying +;;; flicker as the prompt is deleted, redisplay occurs while Emacs +;;; waits for a response from the debugger, and the new prompt is +;;; inserted. Instead, we'll wait until we actually get some output +;;; from the subprocess before we delete the prompt. If the command +;;; produced no output other than a new prompt, that prompt will most +;;; likely be in the first chunk of output received, so we will delete +;;; the prompt and then replace it with an identical one. If the +;;; command produces output, the prompt is moving anyway, so the +;;; flicker won't be annoying. +;;; +;;; So - when we want to delete the prompt upon receipt of the next +;;; chunk of debugger output, we position gud-delete-prompt-marker at +;;; the start of the prompt; the process filter will notice this, and +;;; delete all text between it and the process output marker. If +;;; gud-delete-prompt-marker points nowhere, we leave the current +;;; prompt alone. +(defvar gud-delete-prompt-marker nil) + + +(defvar gdbish-comint-mode-map (copy-keymap comint-mode-map)) +(define-key gdbish-comint-mode-map "\C-c\M-\C-r" 'gud-display-registers-buffer) +(define-key gdbish-comint-mode-map "\C-c\M-\C-f" 'gud-display-frames-buffer) +(define-key gdbish-comint-mode-map "\C-c\M-\C-b" 'gud-display-breakpoints-buffer) + +(defun gud-mode () + "Major mode for interacting with an inferior debugger process. + + You start it up with one of the commands M-x gdb, M-x sdb, M-x dbx, +or M-x xdb. Each entry point finishes by executing a hook; `gdb-mode-hook', +`sdb-mode-hook', `dbx-mode-hook' or `xdb-mode-hook' respectively. + +After startup, the following commands are available in both the GUD +interaction buffer and any source buffer GUD visits due to a breakpoint stop +or step operation: + +\\[gud-break] sets a breakpoint at the current file and line. In the +GUD buffer, the current file and line are those of the last breakpoint or +step. In a source buffer, they are the buffer's file and current line. + +\\[gud-remove] removes breakpoints on the current file and line. + +\\[gud-refresh] displays in the source window the last line referred to +in the gud buffer. + +\\[gud-step], \\[gud-next], and \\[gud-stepi] do a step-one-line, +step-one-line (not entering function calls), and step-one-instruction +and then update the source window with the current file and position. +\\[gud-cont] continues execution. + +\\[gud-print] tries to find the largest C lvalue or function-call expression +around point, and sends it to the debugger for value display. + +The above commands are common to all supported debuggers except xdb which +does not support stepping instructions. + +Under gdb, sdb and xdb, \\[gud-tbreak] behaves exactly like \\[gud-break], +except that the breakpoint is temporary; that is, it is removed when +execution stops on it. + +Under gdb, dbx, and xdb, \\[gud-up] pops up through an enclosing stack +frame. \\[gud-down] drops back down through one. + +If you are using gdb or xdb, \\[gud-finish] runs execution to the return from +the current function and stops. + +All the keystrokes above are accessible in the GUD buffer +with the prefix C-c, and in all buffers through the prefix C-x C-a. + +All pre-defined functions for which the concept make sense repeat +themselves the appropriate number of times if you give a prefix +argument. + +You may use the `gud-def' macro in the initialization hook to define other +commands. + +Other commands for interacting with the debugger process are inherited from +comint mode, which see." + (interactive) + (comint-mode) + (setq major-mode 'gud-mode) + (setq mode-name "Debugger") + (setq mode-line-process '(": %s")) + (use-local-map (copy-keymap gdbish-comint-mode-map)) + (make-local-variable 'gud-last-frame) + (setq gud-last-frame nil) + (make-local-variable 'comint-prompt-regexp) + (make-local-variable 'gud-delete-prompt-marker) + (setq gud-delete-prompt-marker (make-marker)) + (run-hooks 'gud-mode-hook) +) + +(defvar gud-comint-buffer nil) + +;; Chop STRING into words separated by SPC or TAB and return a list of them. +(defun gud-chop-words (string) + (let ((i 0) (beg 0) + (len (length string)) + (words nil)) + (while (< i len) + (if (memq (aref string i) '(?\t ? )) + (progn + (setq words (cons (substring string beg i) words) + beg (1+ i)) + (while (and (< beg len) (memq (aref string beg) '(?\t ? ))) + (setq beg (1+ beg))) + (setq i (1+ beg))) + (setq i (1+ i)))) + (if (< beg len) + (setq words (cons (substring string beg) words))) + (nreverse words))) + +(defvar gud-target-name "--unknown--" + "The apparent name of the program being debugged in a gud buffer. +For sure this the root string used in smashing together the gud +buffer's name, even if that doesn't happen to be the name of a +program.") + +;; Perform initializations common to all debuggers. +(defun gud-common-init (command-line) + (let* ((words (gud-chop-words command-line)) + (program (car words)) + (file-word (let ((w (cdr words))) + (while (and w (= ?- (aref (car w) 0))) + (setq w (cdr w))) + (car w))) + (args (delq file-word (cdr words))) + (file (expand-file-name file-word)) + (filepart (file-name-nondirectory file)) + (buffer-name (concat "*gud-" filepart "*"))) + (switch-to-buffer buffer-name) + (setq default-directory (file-name-directory file)) + (or (bolp) (newline)) + (insert "Current directory is " default-directory "\n") + (apply 'make-comint (concat "gud-" filepart) program nil + (gud-massage-args file args)) + (gud-mode) + (make-variable-buffer-local 'gud-target-name) + (setq gud-target-name filepart)) + (set-process-filter (get-buffer-process (current-buffer)) 'gud-filter) + (set-process-sentinel (get-buffer-process (current-buffer)) 'gud-sentinel) + (gud-set-buffer) + ) + +(defun gud-set-buffer () + (cond ((eq major-mode 'gud-mode) + (setq gud-comint-buffer (current-buffer))))) + +;; These functions are responsible for inserting output from your debugger +;; into the buffer. The hard work is done by the method that is +;; the value of gud-marker-filter. + +(defun gud-filter (proc string) + ;; Here's where the actual buffer insertion is done + (let ((inhibit-quit t)) + (save-excursion + (set-buffer (process-buffer proc)) + (let (moving output-after-point) + (save-excursion + (goto-char (process-mark proc)) + ;; If we have been so requested, delete the debugger prompt. + (if (marker-buffer gud-delete-prompt-marker) + (progn + (delete-region (point) gud-delete-prompt-marker) + (set-marker gud-delete-prompt-marker nil))) + (insert-before-markers (gud-marker-filter string)) + (setq moving (= (point) (process-mark proc))) + (setq output-after-point (< (point) (process-mark proc))) + ;; Check for a filename-and-line number. + ;; Don't display the specified file + ;; unless (1) point is at or after the position where output appears + ;; and (2) this buffer is on the screen. + (if (and gud-last-frame + (not output-after-point) + (get-buffer-window (current-buffer))) + (gud-display-frame))) + (if moving (goto-char (process-mark proc))))))) + +(defun gud-sentinel (proc msg) + (cond ((null (buffer-name (process-buffer proc))) + ;; buffer killed + ;; Stop displaying an arrow in a source file. + (setq overlay-arrow-position nil) + (set-process-buffer proc nil)) + ((memq (process-status proc) '(signal exit)) + ;; Stop displaying an arrow in a source file. + (setq overlay-arrow-position nil) + ;; Fix the mode line. + (setq mode-line-process + (concat ": " + (symbol-name (process-status proc)))) + (let* ((obuf (current-buffer))) + ;; save-excursion isn't the right thing if + ;; process-buffer is current-buffer + (unwind-protect + (progn + ;; Write something in *compilation* and hack its mode line, + (set-buffer (process-buffer proc)) + ;; Force mode line redisplay soon + (set-buffer-modified-p (buffer-modified-p)) + (if (eobp) + (insert ?\n mode-name " " msg) + (save-excursion + (goto-char (point-max)) + (insert ?\n mode-name " " msg))) + ;; If buffer and mode line will show that the process + ;; is dead, we can delete it now. Otherwise it + ;; will stay around until M-x list-processes. + (delete-process proc)) + ;; Restore old buffer, but don't restore old point + ;; if obuf is the gud buffer. + (set-buffer obuf)))))) + +(defun gud-display-frame () + "Find and obey the last filename-and-line marker from the debugger. +Obeying it means displaying in another window the specified file and line." + (interactive) + (if gud-last-frame + (progn + (gud-set-buffer) + (gud-display-line (car gud-last-frame) (cdr gud-last-frame)) + (setq gud-last-last-frame gud-last-frame + gud-last-frame nil)))) + +;; Make sure the file named TRUE-FILE is in a buffer that appears on the screen +;; and that its line LINE is visible. +;; Put the overlay-arrow on the line LINE in that buffer. +;; Most of the trickiness in here comes from wanting to preserve the current +;; region-restriction if that's possible. We use an explicit display-buffer +;; to get around the fact that this is called inside a save-excursion. + +(defun gud-display-line (true-file line) + (let* ((buffer (gud-find-file true-file)) + (window (display-buffer buffer)) + (pos)) +;;; (if (equal buffer (current-buffer)) +;;; nil +;;; (setq buffer-read-only nil)) + (save-excursion +;;; (setq buffer-read-only t) + (set-buffer buffer) + (save-restriction + (widen) + (goto-line line) + (setq pos (point)) + (setq overlay-arrow-string "=>") + (or overlay-arrow-position + (setq overlay-arrow-position (make-marker))) + (set-marker overlay-arrow-position (point) (current-buffer))) + (cond ((or (< pos (point-min)) (> pos (point-max))) + (widen) + (goto-char pos)))) + (set-window-point window overlay-arrow-position))) + +;;; The gud-call function must do the right thing whether its invoking +;;; keystroke is from the GUD buffer itself (via major-mode binding) +;;; or a C buffer. In the former case, we want to supply data from +;;; gud-last-frame. Here's how we do it: + +(defun gud-format-command (str arg) + (let ((insource (not (eq (current-buffer) gud-comint-buffer)))) + (if (string-match "\\(.*\\)%f\\(.*\\)" str) + (setq str (concat + (substring str (match-beginning 1) (match-end 1)) + (file-name-nondirectory (if insource + (buffer-file-name) + (car gud-last-frame))) + (substring str (match-beginning 2) (match-end 2))))) + (if (string-match "\\(.*\\)%d\\(.*\\)" str) + (setq str (concat + (substring str (match-beginning 1) (match-end 1)) + (file-name-directory (if insource + (buffer-file-name) + (car gud-last-frame))) + (substring str (match-beginning 2) (match-end 2))))) + (if (string-match "\\(.*\\)%l\\(.*\\)" str) + (setq str (concat + (substring str (match-beginning 1) (match-end 1)) + (if insource + (save-excursion + (beginning-of-line) + (save-restriction (widen) + (1+ (count-lines 1 (point))))) + (cdr gud-last-frame)) + (substring str (match-beginning 2) (match-end 2))))) + (if (string-match "\\(.*\\)%e\\(.*\\)" str) + (setq str (concat + (substring str (match-beginning 1) (match-end 1)) + (find-c-expr) + (substring str (match-beginning 2) (match-end 2))))) + (if (string-match "\\(.*\\)%a\\(.*\\)" str) + (setq str (concat + (substring str (match-beginning 1) (match-end 1)) + (gud-read-address) + (substring str (match-beginning 2) (match-end 2))))) + (if (string-match "\\(.*\\)%p\\(.*\\)" str) + (setq str (concat + (substring str (match-beginning 1) (match-end 1)) + (if arg (int-to-string arg) "") + (substring str (match-beginning 2) (match-end 2))))) + ) + str + ) + +(defun gud-read-address () + "Return a string containing the core-address found in the buffer at point." + (save-excursion + (let ((pt (point)) found begin) + (setq found (if (search-backward "0x" (- pt 7) t) (point))) + (cond + (found (forward-char 2) + (buffer-substring found + (progn (re-search-forward "[^0-9a-f]") + (forward-char -1) + (point)))) + (t (setq begin (progn (re-search-backward "[^0-9]") + (forward-char 1) + (point))) + (forward-char 1) + (re-search-forward "[^0-9]") + (forward-char -1) + (buffer-substring begin (point))))))) + +(defun gud-call (fmt &optional arg) + (let ((msg (gud-format-command fmt arg))) + (message "Command: %s" msg) + (sit-for 0) + (gud-basic-call msg))) + +(defun gud-basic-call (command) + "Invoke the debugger COMMAND displaying source in other window." + (interactive) + (gud-set-buffer) + (let ((command (concat command "\n")) + (proc (get-buffer-process gud-comint-buffer))) + + ;; Arrange for the current prompt to get deleted. + (save-excursion + (set-buffer gud-comint-buffer) + (goto-char (process-mark proc)) + (beginning-of-line) + (if (looking-at comint-prompt-regexp) + (set-marker gud-delete-prompt-marker (point)))) + (process-send-string proc command))) + +(defun gud-refresh (&optional arg) + "Fix up a possibly garbled display, and redraw the arrow." + (interactive "P") + (recenter arg) + (or gud-last-frame (setq gud-last-frame gud-last-last-frame)) + (gud-display-frame)) + +;;; Code for parsing expressions out of C code. The single entry point is +;;; find-c-expr, which tries to return an lvalue expression from around point. +;;; +;;; The rest of this file is a hacked version of gdbsrc.el by +;;; Debby Ayers <ayers@asc.slb.com>, +;;; Rich Schaefer <schaefer@asc.slb.com> Schlumberger, Austin, Tx. + +(defun find-c-expr () + "Returns the C expr that surrounds point." + (interactive) + (save-excursion + (let ((p) (expr) (test-expr)) + (setq p (point)) + (setq expr (expr-cur)) + (setq test-expr (expr-prev)) + (while (expr-compound test-expr expr) + (setq expr (cons (car test-expr) (cdr expr))) + (goto-char (car expr)) + (setq test-expr (expr-prev))) + (goto-char p) + (setq test-expr (expr-next)) + (while (expr-compound expr test-expr) + (setq expr (cons (car expr) (cdr test-expr))) + (setq test-expr (expr-next)) + ) + (buffer-substring (car expr) (cdr expr))))) + +(defun expr-cur () + "Returns the expr that point is in; point is set to beginning of expr. +The expr is represented as a cons cell, where the car specifies the point in +the current buffer that marks the beginning of the expr and the cdr specifies +the character after the end of the expr." + (let ((p (point)) (begin) (end)) + (expr-backward-sexp) + (setq begin (point)) + (expr-forward-sexp) + (setq end (point)) + (if (>= p end) + (progn + (setq begin p) + (goto-char p) + (expr-forward-sexp) + (setq end (point)) + ) + ) + (goto-char begin) + (cons begin end))) + +(defun expr-backward-sexp () + "Version of `backward-sexp' that catches errors." + (condition-case nil + (backward-sexp) + (error t))) + +(defun expr-forward-sexp () + "Version of `forward-sexp' that catches errors." + (condition-case nil + (forward-sexp) + (error t))) + +(defun expr-prev () + "Returns the previous expr, point is set to beginning of that expr. +The expr is represented as a cons cell, where the car specifies the point in +the current buffer that marks the beginning of the expr and the cdr specifies +the character after the end of the expr" + (let ((begin) (end)) + (expr-backward-sexp) + (setq begin (point)) + (expr-forward-sexp) + (setq end (point)) + (goto-char begin) + (cons begin end))) + +(defun expr-next () + "Returns the following expr, point is set to beginning of that expr. +The expr is represented as a cons cell, where the car specifies the point in +the current buffer that marks the beginning of the expr and the cdr specifies +the character after the end of the expr." + (let ((begin) (end)) + (expr-forward-sexp) + (expr-forward-sexp) + (setq end (point)) + (expr-backward-sexp) + (setq begin (point)) + (cons begin end))) + +(defun expr-compound-sep (span-start span-end) + "Returns '.' for '->' & '.', returns ' ' for white space, +returns '?' for other punctuation." + (let ((result ? ) + (syntax)) + (while (< span-start span-end) + (setq syntax (char-syntax (char-after span-start))) + (cond + ((= syntax ? ) t) + ((= syntax ?.) (setq syntax (char-after span-start)) + (cond + ((= syntax ?.) (setq result ?.)) + ((and (= syntax ?-) (= (char-after (+ span-start 1)) ?>)) + (setq result ?.) + (setq span-start (+ span-start 1))) + (t (setq span-start span-end) + (setq result ??))))) + (setq span-start (+ span-start 1))) + result)) + +(defun expr-compound (first second) + "Non-nil if concatenating FIRST and SECOND makes a single C token. +The two exprs are represented as a cons cells, where the car +specifies the point in the current buffer that marks the beginning of the +expr and the cdr specifies the character after the end of the expr. +Link exprs of the form: + Expr -> Expr + Expr . Expr + Expr (Expr) + Expr [Expr] + (Expr) Expr + [Expr] Expr" + (let ((span-start (cdr first)) + (span-end (car second)) + (syntax)) + (setq syntax (expr-compound-sep span-start span-end)) + (cond + ((= (car first) (car second)) nil) + ((= (cdr first) (cdr second)) nil) + ((= syntax ?.) t) + ((= syntax ? ) + (setq span-start (char-after (- span-start 1))) + (setq span-end (char-after span-end)) + (cond + ((= span-start ?) ) t ) + ((= span-start ?] ) t ) + ((= span-end ?( ) t ) + ((= span-end ?[ ) t ) + (t nil)) + ) + (t nil)))) + +(provide 'gud) + +;;; gud.el ends here + +(defun toggle-bp-this-line () + (interactive) + (save-excursion + (let (bp-num bp-state) + (beginning-of-line 1) + (if (not (looking-at "\\([0-9]*\\)\\s-*\\S-*\\s-*\\S-*\\s-*\\(.\\)")) + (error "Not recognized as breakpoint line (demo foo).") + (process-send-string + gdb-buffer-process!!! + (concat + (if (eq ?y (char-after (match-beginning 2))) + "server disable " + "server enable ") + (buffer-substring (match-beginning 0) + (match-end 1)) + "\n")))))) + + |