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1 ;;; dbx.el --- run dbx under Emacs
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2 ;; Copyright (C) 1988 Free Software Foundation, Inc.
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3 ;; Main author Masanobu UMEDA (umerin@flab.fujitsu.junet)
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4 ;; Keywords: c, unix, tools, debugging
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5
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6 ;; This file is part of XEmacs.
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7
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8 ;; XEmacs is free software; you can redistribute it and/or modify it
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9 ;; under the terms of the GNU General Public License as published by
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10 ;; the Free Software Foundation; either version 2, or (at your option)
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11 ;; any later version.
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12
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13 ;; XEmacs is distributed in the hope that it will be useful, but
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14 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 ;; General Public License for more details.
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17
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18 ;; You should have received a copy of the GNU General Public License
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19 ;; along with XEmacs; see the file COPYING. If not, write to the
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20 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 ;; Boston, MA 02111-1307, USA.
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22
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23 (require 'comint)
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24
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25 (defvar dbx-trace-flag nil
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26 "Dbx trace switch.")
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27
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28 (defvar dbx-process nil
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29 "The process in which dbx is running.")
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30
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31 (defvar dbx-break-point
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32 "stopped in .* at line \\([0-9]*\\) in file \"\\([^\"]*\\)\""
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33 "Regexp of pattern that dbx writes at break point.")
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34
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35 (defvar inferior-dbx-mode-map nil)
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36 (if inferior-dbx-mode-map
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37 nil
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38 (setq inferior-dbx-mode-map (make-sparse-keymap))
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39 (set-keymap-name inferior-dbx-mode-map 'inferior-dbx-mode-map)
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40 (set-keymap-parent inferior-dbx-mode-map comint-mode-map)
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41 (define-key inferior-dbx-mode-map "\C-c\C-w" 'dbx-where)
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42 (define-key inferior-dbx-mode-map "\C-c\C-t" 'dbx-trace-mode)
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43 (define-key ctl-x-map " " 'dbx-stop-at))
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44
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45 (defun inferior-dbx-mode ()
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46 "Major mode for interacting with an inferior dbx process.
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47
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48 The following commands are available:
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49 \\{inferior-dbx-mode-map}
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50
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51 Entry to this mode calls the value of dbx-mode-hook with no arguments,
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52 if that value is non-nil. Likewise with the value of comint-mode-hook.
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53 dbx-mode-hook is called after comint-mode-hook.
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54
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55 You can display the debugging program in other window and point out
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56 where you are looking at using the command \\[dbx-where].
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57
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58 \\[dbx-trace-mode] toggles dbx-trace mode. In dbx-trace mode,
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59 debugging program is automatically traced using output from dbx.
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60
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61 The command \\[dbx-stop-at] sets break point at current line of the
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62 program in the buffer. Major mode name of the buffer must be in
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63 dbx-language-mode-list.
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64
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65 Commands:
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66
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67 Return at end of buffer sends line as input.
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68 Return not at end copies line, sans any dbx prompt, to end and sends it.
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69 \\[shell-send-eof] sends end-of-file as input.
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70 \\[comint-kill-input] and \\[backward-kill-word] are kill commands, imitating normal Unix input editing.
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71 \\[comint-interrupt-subjob] interrupts the shell or its current subjob if any.
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72 \\[comint-stop-subjob] stops, likewise. \\[comint-quit-subjob] sends quit signal, likewise.
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73 \\[dbx-where] displays debugging program in other window and
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74 points out where you are looking at.
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75 \\[dbx-trace-mode] toggles dbx-trace mode.
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76 \\[dbx-stop-at] sets break point at current line."
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77 (interactive)
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78 (kill-all-local-variables)
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79 (comint-mode)
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80 (use-local-map inferior-dbx-mode-map)
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81 (setq major-mode 'inferior-dbx-mode
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82 mode-name "Inferior dbx"
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83 comint-prompt-regexp "^[^)]*dbx) *")
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84 (make-local-variable 'dbx-trace-flag)
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85 (or (assq 'dbx-trace-flag minor-mode-alist)
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86 (setq minor-mode-alist
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87 (cons '(dbx-trace-flag " Trace") minor-mode-alist)))
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88 (run-hooks 'dbx-mode-hook))
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89
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90 (defun run-dbx (path)
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91 "Run inferior dbx process on PROGRAM, with I/O via buffer *dbx-PROGRAM*."
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92 (interactive "fProgram to debug: ")
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93 (setq path (expand-file-name path))
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94 (let ((file (file-name-nondirectory path)))
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95 (switch-to-buffer (concat "*dbx-" file "*"))
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96 (setq default-directory (file-name-directory path))
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97 (switch-to-buffer (make-comint (concat "dbx-" file) "dbx" nil file)))
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98 (setq dbx-process (get-buffer-process (current-buffer)))
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99 (set-process-filter dbx-process 'dbx-filter)
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100 (inferior-dbx-mode))
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101
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102 (defun dbx-trace-mode (arg)
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103 "Toggle dbx-trace mode.
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104 With arg, turn dbx-trace mode on iff arg is positive.
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105 In dbx-trace mode, user program is automatically traced."
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106 (interactive "P")
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107 (if (not (eql major-mode 'inferior-dbx-mode))
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108 (error "dbx-trace mode is effective in inferior-dbx mode only."))
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109 (setq dbx-trace-flag
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110 (if (null arg)
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111 (not dbx-trace-flag)
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112 (> (prefix-numeric-value arg) 0)))
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113 ;; Force mode line redisplay
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114 (set-buffer-modified-p (buffer-modified-p)))
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115
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116 (defun dbx-filter (process string)
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117 "Trace debugging program automatically if dbx-trace-flag is not nil."
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118 (save-excursion
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119 (set-buffer (process-buffer process))
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120 (goto-char (point-max))
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121 (let ((beg (point)))
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122 (insert-before-markers string)
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123 (if dbx-trace-flag ;Trace mode is on?
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124 (dbx-where beg t)))
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125 (if (process-mark process)
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126 (set-marker (process-mark process) (point-max))))
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127 (if (eq (process-buffer process)
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128 (current-buffer))
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129 (goto-char (point-max)))
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130 )
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131
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132 (defun dbx-where (&optional begin quiet)
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133 "Display dbx'ed program in other window and point out where you are looking.
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134 BEGIN bounds the search. If QUIET, just return nil (no error) if fail."
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135 (interactive)
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136 (let (file line)
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137 (save-excursion
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138 (if (re-search-backward dbx-break-point begin quiet)
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139 (progn
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140 (setq line (buffer-substring (match-beginning 1) (match-end 1)))
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141 (setq file (buffer-substring (match-beginning 2) (match-end 2)))
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142 )))
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143 (if (and file line) ;Find break point?
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144 (progn
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145 (find-file-other-window (expand-file-name file nil))
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146 (goto-line (string-to-int line)) ;Jump to the line
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147 (beginning-of-line)
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148 (setq overlay-arrow-string "=>")
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149 (or overlay-arrow-position
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150 (setq overlay-arrow-position (make-marker)))
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151 (set-marker overlay-arrow-position (point) (current-buffer))
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152 (other-window 1)) ;Return to dbx
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153 )))
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154
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155 (defun dbx-stop-at ()
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156 "Set break point at current line."
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157 (interactive)
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158 (let ((file-name (file-name-nondirectory buffer-file-name))
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159 (line (save-restriction
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160 (widen)
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161 (1+ (count-lines 1 (point))))))
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162 (process-send-string dbx-process
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163 (concat "stop at \"" file-name "\":" line "\n"))))
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