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- ;;; gud.el --- Grand Unified Debugger mode for gdb, sdb, dbx, or xdb
- ;;; under Emacs
-
- ;; Author: Eric S. Raymond <esr@snark.thyrsus.com>
- ;; 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).
-
- ;;; 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-debugger-startup (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 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)
-
- ;; 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>-debugger-startup
- ;; gud-<name>-marker-filter
- ;; gud-<name>-find-file
- ;;
- ;; The job of the startup-command method is to fire up a copy of the debugger,
- ;; given a list of debugger arguments.
- ;;
- ;; 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-debugger-startup (file args)
- (apply 'make-comint (concat "gud-" file) "gdb" nil "-fullname" args))
-
- (defun gud-gdb-marker-filter (string)
- (if (string-match "\032\032\\([^:\n]*\\):\\([0-9]*\\):.*\n" string)
- (progn
- (setq gud-last-frame
- (cons
- (substring string (match-beginning 1) (match-end 1))
- (string-to-int
- (substring string (match-beginning 2) (match-end 2)))))
- ;; this computation means the ^Z^Z-initiated marker in the
- ;; input string is never emitted.
- (concat
- (substring string 0 (match-beginning 0))
- (substring string (match-end 0))
- ))
- string))
-
- (defun gud-gdb-find-file (f)
- (find-file-noselect f))
-
- ;;;###autoload
- (defun gdb (args)
- "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): gdb "
- (if (consp gud-gdb-history)
- (car gud-gdb-history)
- "")
- nil nil
- '(gud-gdb-history . 1))))
- (gud-overload-functions '((gud-debugger-startup . gud-gdb-debugger-startup)
- (gud-marker-filter . gud-gdb-marker-filter)
- (gud-find-file . gud-gdb-find-file)
- ))
-
- (gud-common-init args)
-
- (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[+]?) *")
- (run-hooks 'gdb-mode-hook)
- )
-
-
- ;; ======================================================================
- ;; 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-debugger-startup (file args)
- (apply 'make-comint (concat "gud-" file) "sdb" nil 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 (args)
- "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): sdb "
- (if (consp gud-sdb-history)
- (car gud-sdb-history)
- "")
- 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-debugger-startup . gud-sdb-debugger-startup)
- (gud-marker-filter . gud-sdb-marker-filter)
- (gud-find-file . gud-sdb-find-file)
- ))
-
- (gud-common-init args)
-
- (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-debugger-startup (file args)
- (apply 'make-comint (concat "gud-" file) "dbx" nil args))
-
- (defun gud-dbx-marker-filter (string)
- (if (string-match
- "stopped 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 (args)
- "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): dbx "
- (if (consp gud-dbx-history)
- (car gud-dbx-history)
- "")
- nil nil
- '(gud-dbx-history . 1))))
- (gud-overload-functions '((gud-debugger-startup . gud-dbx-debugger-startup)
- (gud-marker-filter . gud-dbx-marker-filter)
- (gud-find-file . gud-dbx-find-file)
- ))
-
- (gud-common-init args)
-
- (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-debugger-startup (file args)
- (apply 'make-comint (concat "gud-" file) "xdb" nil
- (append (let ((directories gud-xdb-directories)
- (result nil))
- (while directories
- (setq result (cons (car directories) (cons "-d" result)))
- (setq directories (cdr directories)))
- (nreverse 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 (args)
- "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): xdb "
- (if (consp gud-xdb-history)
- (car gud-xdb-history)
- "")
- nil nil
- '(gud-xdb-history . 1))))
- (gud-overload-functions '((gud-debugger-startup . gud-xdb-debugger-startup)
- (gud-marker-filter . gud-xdb-marker-filter)
- (gud-find-file . gud-xdb-find-file)))
-
- (gud-common-init args)
-
- (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))
-
- ;;
- ;; 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)
-
-
- (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 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)
-
- (defun gud-common-init (args)
- ;; Perform initializations common to all debuggers
- ;; There *must* be a cleaner way to lex the arglist...
- (let (file i)
- (if (string= args "")
- (setq args nil)
- (save-excursion
- (set-buffer (get-buffer-create "*gud-scratch*"))
- (erase-buffer)
- (insert args)
- (goto-char (point-max))
- (insert "\")")
- (goto-char (point-min))
- (insert "(\"")
- (while (re-search-forward " +" nil t)
- (replace-match "\" \"" nil nil))
- (goto-char (point-min))
- (while (re-search-forward "\"\"" nil t)
- (replace-match "" nil nil))
- (setq args (read (buffer-string)))
- (kill-buffer (current-buffer))))
- (setq i (1- (length args)))
- (while (and (>= i 0) (not (= (aref (nth i args) 0) ?-)))
- (setq file (nth i args)) (setq i (1- i)))
- (let* ((path (expand-file-name file))
- (filepart (file-name-nondirectory path)))
- (switch-to-buffer (concat "*gud-" filepart "*"))
- (setq default-directory (file-name-directory path))
- (or (bolp) (newline))
- (insert "Current directory is " default-directory "\n")
- (gud-debugger-startup filepart args)))
- (gud-mode)
- (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)
- (progn
- (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 "\\(.*\\)%l\\(.*\\)" str)
- (progn
- (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)
- (progn
- (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)
- (progn
- (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)
- (progn
- (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))))
-
- ;;; gud.el ends here
-