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1889 lines
63 KiB
EmacsLisp
1889 lines
63 KiB
EmacsLisp
(defmacro gud (form)
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(` (save-excursion (set-buffer "*gud-a.out*") (, form))))
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(defun dbug (foo &optional fun)
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(save-excursion
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(set-buffer (get-buffer-create "*trace*"))
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(goto-char (point-max))
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(insert "***" (symbol-name foo) "\n")
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(if fun
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(funcall fun))))
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;;; gud.el --- Grand Unified Debugger mode for gdb, sdb, dbx, or xdb
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;;; under Emacs
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;; Author: Eric S. Raymond <esr@snark.thyrsus.com>
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;; Maintainer: FSF
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;; Version: 1.3
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;; Keywords: unix, tools
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;; Copyright (C) 1992, 1993 Free Software Foundation, Inc.
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;;; Commentary:
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;; The ancestral gdb.el was by W. Schelter <wfs@rascal.ics.utexas.edu>
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;; It was later rewritten by rms. Some ideas were due to Masanobu.
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;; Grand Unification (sdb/dbx support) by Eric S. Raymond <esr@thyrsus.com>
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;; The overloading code was then rewritten by Barry Warsaw <bwarsaw@cen.com>,
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;; who also hacked the mode to use comint.el. Shane Hartman <shane@spr.com>
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;; added support for xdb (HPUX debugger).
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;; Cygnus Support added support for gdb's --annotate=2.
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;;; Code:
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(require 'comint)
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(require 'etags)
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;; ======================================================================
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;; GUD commands must be visible in C buffers visited by GUD
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(defvar gud-key-prefix "\C-x\C-a"
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"Prefix of all GUD commands valid in C buffers.")
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(global-set-key (concat gud-key-prefix "\C-l") 'gud-refresh)
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(global-set-key "\C-x " 'gud-break) ;; backward compatibility hack
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;; ======================================================================
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;; the overloading mechanism
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(defun gud-overload-functions (gud-overload-alist)
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"Overload functions defined in GUD-OVERLOAD-ALIST.
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This association list has elements of the form
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(ORIGINAL-FUNCTION-NAME OVERLOAD-FUNCTION)"
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(mapcar
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(function (lambda (p) (fset (car p) (symbol-function (cdr p)))))
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gud-overload-alist))
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(defun gud-massage-args (file args)
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(error "GUD not properly entered."))
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(defun gud-marker-filter (str)
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(error "GUD not properly entered."))
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(defun gud-find-file (f)
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(error "GUD not properly entered."))
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;; ======================================================================
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;; command definition
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;; This macro is used below to define some basic debugger interface commands.
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;; Of course you may use `gud-def' with any other debugger command, including
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;; user defined ones.
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;; A macro call like (gud-def FUNC NAME KEY DOC) expands to a form
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;; which defines FUNC to send the command NAME to the debugger, gives
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;; it the docstring DOC, and binds that function to KEY in the GUD
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;; major mode. The function is also bound in the global keymap with the
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;; GUD prefix.
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(defmacro gud-def (func cmd key &optional doc)
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"Define FUNC to be a command sending STR and bound to KEY, with
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optional doc string DOC. Certain %-escapes in the string arguments
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are interpreted specially if present. These are:
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%f name (without directory) of current source file.
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%d directory of current source file.
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%l number of current source line
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%e text of the C lvalue or function-call expression surrounding point.
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%a text of the hexadecimal address surrounding point
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%p prefix argument to the command (if any) as a number
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The `current' source file is the file of the current buffer (if
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we're in a C file) or the source file current at the last break or
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step (if we're in the GUD buffer).
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The `current' line is that of the current buffer (if we're in a
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source file) or the source line number at the last break or step (if
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we're in the GUD buffer)."
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(list 'progn
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(list 'defun func '(arg)
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(or doc "")
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'(interactive "p")
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(list 'gud-call cmd 'arg))
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(if key
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(list 'define-key
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'(current-local-map)
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(concat "\C-c" key)
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(list 'quote func)))
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(if key
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(list 'global-set-key
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(list 'concat 'gud-key-prefix key)
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(list 'quote func)))))
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;; Where gud-display-frame should put the debugging arrow. This is
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;; set by the marker-filter, which scans the debugger's output for
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;; indications of the current program counter.
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(defvar gud-last-frame nil)
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;; Used by gud-refresh, which should cause gud-display-frame to redisplay
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;; the last frame, even if it's been called before and gud-last-frame has
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;; been set to nil.
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(defvar gud-last-last-frame nil)
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;; All debugger-specific information is collected here.
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;; Here's how it works, in case you ever need to add a debugger to the mode.
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;;
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;; Each entry must define the following at startup:
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;;
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;;<name>
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;; comint-prompt-regexp
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;; gud-<name>-massage-args
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;; gud-<name>-marker-filter
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;; gud-<name>-find-file
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;;
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;; The job of the massage-args method is to modify the given list of
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;; debugger arguments before running the debugger.
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;;
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;; The job of the marker-filter method is to detect file/line markers in
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;; strings and set the global gud-last-frame to indicate what display
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;; action (if any) should be triggered by the marker. Note that only
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;; whatever the method *returns* is displayed in the buffer; thus, you
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;; can filter the debugger's output, interpreting some and passing on
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;; the rest.
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;;
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;; The job of the find-file method is to visit and return the buffer indicated
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;; by the car of gud-tag-frame. This may be a file name, a tag name, or
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;; something else.
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;; ======================================================================
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;; gdb functions
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;;; History of argument lists passed to gdb.
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(defvar gud-gdb-history nil)
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(defun gud-gdb-massage-args (file args)
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(cons "--annotate=2" (cons file args)))
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;;
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;; In this world, there are gdb instance objects (of unspecified
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;; representation) and buffers associated with those objects.
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;;
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;;
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;; gdb-instance objects
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;;
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(defun make-gdb-instance (proc)
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"Create a gdb instance object from a gdb process."
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(let ((instance (cons 'gdb-instance proc)))
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(save-excursion
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(set-buffer (process-buffer proc))
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(if (not (equal gdb-buffer-instance instance))
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(progn
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(mapcar 'make-variable-buffer-local gdb-instance-variables)
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(setq gdb-buffer-instance instance) ; These are both...
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(setq gdb-buffer-type 'gud)))) ; ...instance variables
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instance))
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(defun gdb-instance-process (inst) (cdr inst))
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(defvar gdb-instance-variables '()
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"A list of variables that are local to the gud buffer associated
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with a gdb instance.")
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(defmacro def-gdb-variable
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(name accessor setter &optional default doc)
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(`
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(progn
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(defvar (, name) (, default) (, (or doc "undocumented")))
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(if (not (memq '(, name) gdb-instance-variables))
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(setq gdb-instance-variables
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(cons '(, name) gdb-instance-variables)))
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(, (and accessor
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(`
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(defun (, accessor) (instance)
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(let
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((buffer (gdb-get-instance-buffer instance 'gud)))
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(and buffer
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(save-excursion
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(set-buffer buffer)
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(, name))))))))
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(, (and setter
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(`
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(defun (, setter) (instance val)
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(let
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((buffer (gdb-get-instance-buffer instance 'gud)))
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(and buffer
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(save-excursion
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(set-buffer buffer)
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(setq (, name) val)))))))))))
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(defmacro def-gdb-var (root-symbol &optional default doc)
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(let* ((root (symbol-name root-symbol))
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(accessor (intern (concat "gdb-instance-" root)))
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(setter (intern (concat "set-gdb-instance-" root)))
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(var-name (intern (concat "gdb-" root))))
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(` (def-gdb-variable
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(, var-name) (, accessor) (, setter)
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(, default) (, doc)))))
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(def-gdb-var buffer-instance nil
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"In an instance buffer, the buffer's instance.")
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(def-gdb-var buffer-type nil
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"One of the symbols bound in gdb-instance-buffer-rules")
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(def-gdb-var burst ""
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"A string of characters from gdb that have not yet been processed.")
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(def-gdb-var input-queue ()
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"A list of high priority gdb command objects.")
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(def-gdb-var idle-input-queue ()
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"A list of low priority gdb command objects.")
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(def-gdb-var prompting nil
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"True when gdb is idle with no pending input.")
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(def-gdb-var output-sink 'user
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"The disposition of the output of the current gdb command.")
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(def-gdb-var current-item nil
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"The most recent command item sent to gdb.")
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(def-gdb-var pending-triggers '()
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"A list of trigger functions that have run later than their output
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handlers.")
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(defun in-gdb-instance-context (instance form)
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"Funcall `form' in the gud buffer of `instance'"
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(save-excursion
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(set-buffer (gdb-get-instance-buffer instance 'gud))
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(funcall form)))
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;; end of instance vars
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;;
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;; finding instances
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;;
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(defun gdb-proc->instance (proc)
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(save-excursion
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(set-buffer (process-buffer proc))
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gdb-buffer-instance))
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(defun gdb-mru-instance-buffer ()
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"Return the most recently used (non-auxiliary) gdb gud buffer."
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(save-excursion
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(gdb-goto-first-gdb-instance (buffer-list))))
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(defun gdb-goto-first-gdb-instance (blist)
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"Use gdb-mru-instance-buffer -- not this."
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(and blist
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(progn
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(set-buffer (car blist))
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(or (and gdb-buffer-instance
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(eq gdb-buffer-type 'gud)
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(car blist))
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(gdb-goto-first-gdb-instance (cdr blist))))))
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(defun buffer-gdb-instance (buf)
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(save-excursion
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(set-buffer buf)
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gdb-buffer-instance))
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(defun gdb-needed-default-instance ()
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"Return the most recently used gdb instance or signal an error."
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(let ((buffer (gdb-mru-instance-buffer)))
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(or (and buffer (buffer-gdb-instance buffer))
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(error "No instance of gdb found."))))
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(defun gdb-instance-target-string (instance)
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"The apparent name of the program being debugged by a gdb instance.
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For sure this the root string used in smashing together the gud
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buffer's name, even if that doesn't happen to be the name of a
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program."
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(in-gdb-instance-context
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instance
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(function (lambda () gud-target-name))))
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;; More than one buffer can be associated with a gdb instance.
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;;
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;; Each buffer has a TYPE -- an atom that identifies the function
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;; of that particular buffer.
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;;
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;; The usual gud interaction buffer is given the type `gud' and
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;; is constructed specially.
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;;
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;; Others are constructed by gdb-get-create-instance-buffer and
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;; named according to the rules set forth here:
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;;
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(defvar gdb-instance-buffer-rules-assoc
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'((gud error) ; gud buffers construct specially
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(gdb-partial-output-buffer
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gdb-partial-output-name
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)
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(gdb-registers-buffer
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gdb-registers-buffer-name)
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(gdb-breakpoints-buffer
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gdb-breakpoints-buffer-name
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gud-breakpoints-mode)
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(gdb-frames-buffer
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gdb-frames-buffer-name)))
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;;
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;; gdb communications
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;;
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;; input: things sent to gdb
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;;
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;; Each instance has a high and low priority
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;; input queue. Low priority input is sent only
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;; when the high priority queue is idle.
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;;
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;; The queues are lists. Each element is either
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;; a string (indicating user or user-like input)
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;; or a list of the form:
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;;
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;; (INPUT-STRING HANDLER-FN)
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;;
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;;
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;; The handler function will be called from the
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;; partial-output buffer when the command completes.
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;;
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;; These lists are consumed tail first.
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;;
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(defun gdb-send (proc string)
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"A comint send filter for gdb.
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This filter may simply queue output for a later time."
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(let ((instance (gdb-proc->instance proc)))
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(gdb-instance-enqueue-input instance (concat string "\n"))))
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;; Note: Stuff enqueued here will be sent to the next prompt, even if it
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;; is a query, or other non-top-level prompt. To guarantee stuff will get
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;; sent to the top-level prompt, currently it must be put in the idle queue.
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(defun gdb-instance-enqueue-input (instance item)
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"Enqueue an input item (a string or a list) for a gdb instance."
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(if (gdb-instance-prompting instance)
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(progn
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(gdb-send-item instance item)
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(set-gdb-instance-prompting instance nil))
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(set-gdb-instance-input-queue
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instance
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(cons item (gdb-instance-input-queue instance)))))
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(defun gdb-instance-dequeue-input (instance)
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(let ((queue (gdb-instance-input-queue instance)))
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(and queue
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(if (not (cdr queue))
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(let ((answer (car queue)))
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(set-gdb-instance-input-queue instance '())
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answer)
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(gdb-take-last-elt queue)))))
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(defun gdb-instance-enqueue-idle-input (instance item)
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"Enqueue idle input (a string or a list) for a gdb instance."
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(if (gdb-instance-prompting instance)
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(progn
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(gdb-send-item instance item)
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(set-gdb-instance-prompting instance nil))
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(set-gdb-instance-idle-input-queue
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instance
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(cons item (gdb-instance-idle-input-queue instance)))))
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(defun gdb-instance-dequeue-idle-input (instance)
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(let ((queue (gdb-instance-idle-input-queue instance)))
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(and queue
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(if (not (cdr queue))
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(let ((answer (car queue)))
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(set-gdb-instance-idle-input-queue instance '())
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answer)
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(gdb-take-last-elt queue)))))
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(defun gdb-take-last-elt (l)
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"Don't use this in general."
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(if (cdr (cdr l))
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(gdb-take-last-elt (cdr l))
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(let ((answer (car (cdr l))))
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(setcdr l '())
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answer)))
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;;
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;; output -- things gdb prints to emacs
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;;
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;; GDB output is a stream interrupted by annotations.
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;; Annotations can be recognized by their beginning
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;; with \C-j\C-z\C-z<tag><opt>\C-j
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;;
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;; The tag is a string obeying symbol syntax.
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||
;;
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;; The optional part `<opt>' can be either the empty string
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||
;; or a space followed by more data relating to the annotation.
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||
;; For example, the SOURCE annotation is followed by a filename,
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;; line number and various useless goo. This data must not include
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;; any newlines.
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;;
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||
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(defun gud-gdb-marker-filter (string)
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"A gud marker filter for gdb."
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||
;; Bogons don't tell us the process except through scoping crud.
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(let ((instance (gdb-proc->instance proc)))
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(gdb-output-burst instance string)))
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(defvar gdb-annotation-rules
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'(("frames-invalid" gdb-invalidate-frames)
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("breakpoints-invalid" gdb-invalidate-breakpoints)
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("pre-prompt" gdb-pre-prompt)
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("prompt" gdb-prompt)
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("commands" gdb-subprompt)
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("overload-choice" gdb-subprompt)
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("query" gdb-subprompt)
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("prompt-for-continue" gdb-subprompt)
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||
("post-prompt" gdb-post-prompt)
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||
("source" gdb-source)
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||
)
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||
"An assoc mapping annotation tags to functions which process them.")
|
||
|
||
|
||
(defun gdb-ignore-annotation (instance args)
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nil)
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||
|
||
(defconst gdb-source-spec-regexp
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"\\(.*\\):\\([0-9]*\\):[0-9]*:[a-z]*:0x[a-f0-9]*")
|
||
|
||
(defun gdb-source (instance args)
|
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"Do not use this except as an annotation handler."
|
||
(string-match gdb-source-spec-regexp args)
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||
;; Extract the frame position from the marker.
|
||
(setq gud-last-frame
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||
(cons
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||
(substring args (match-beginning 1) (match-end 1))
|
||
(string-to-int (substring args
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||
(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
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||
((eq sink 'user) t)
|
||
((eq sink 'post-emacs)
|
||
(set-gdb-instance-output-sink instance 'user))
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||
((or (eq sink 'emacs)
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||
(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-subprompt (instance ignored)
|
||
"An annotation handler for non-top-level prompts."
|
||
(let ((highest (gdb-instance-dequeue-input instance)))
|
||
(if highest
|
||
(gdb-send-item instance highest)
|
||
(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 `post-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)
|
||
;; Else the annotation is not recognized. Ignore it silently,
|
||
;; so that GDB can add new annotations without causing
|
||
;; us to blow up.
|
||
))))
|
||
|
||
|
||
;; Does the remaining text end in a partial line?
|
||
;; If it does, then keep part of the 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)
|
||
(if (cdr (cdr rules))
|
||
(funcall (car (cdr (cdr rules)))))
|
||
new))))
|
||
|
||
(defun gdb-rules-name-maker (rules) (car (cdr rules)))
|
||
|
||
(defun gdb-look-for-tagged-buffer (instance key bufs)
|
||
(let ((retval nil))
|
||
(while (and (not retval) bufs)
|
||
(set-buffer (car bufs))
|
||
(if (and (eq gdb-buffer-instance instance)
|
||
(eq gdb-buffer-type key))
|
||
(setq retval (car bufs)))
|
||
(setq bufs (cdr bufs))
|
||
)
|
||
retval))
|
||
|
||
(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)))
|
||
(gud-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)))
|
||
(gud-display-buffer
|
||
(gdb-get-create-instance-buffer instance
|
||
'gdb-breakpoints-buffer)))
|
||
|
||
|
||
(defun gud-toggle-bp-this-line ()
|
||
(interactive)
|
||
(save-excursion
|
||
(beginning-of-line 1)
|
||
(if (not (looking-at "\\([0-9]*\\)\\s-*\\S-*\\s-*\\S-*\\s-*\\(.\\)"))
|
||
(error "Not recognized as breakpoint line (demo foo).")
|
||
(gdb-instance-enqueue-idle-input
|
||
gdb-buffer-instance
|
||
(list
|
||
(concat
|
||
(if (eq ?y (char-after (match-beginning 2)))
|
||
"server disable "
|
||
"server enable ")
|
||
(buffer-substring (match-beginning 0)
|
||
(match-end 1))
|
||
"\n")
|
||
'(lambda () nil)))
|
||
)))
|
||
|
||
(defun gud-delete-bp-this-line ()
|
||
(interactive)
|
||
(save-excursion
|
||
(beginning-of-line 1)
|
||
(if (not (looking-at "\\([0-9]*\\)\\s-*\\S-*\\s-*\\S-*\\s-*\\(.\\)"))
|
||
(error "Not recognized as breakpoint line (demo foo).")
|
||
(gdb-instance-enqueue-idle-input
|
||
gdb-buffer-instance
|
||
(list
|
||
(concat
|
||
"server delete "
|
||
(buffer-substring (match-beginning 0)
|
||
(match-end 1))
|
||
"\n")
|
||
'(lambda () nil)))
|
||
)))
|
||
|
||
(defvar gud-breakpoints-mode-map nil)
|
||
|
||
(defun gud-breakpoints-mode ()
|
||
"Major mode for gud breakpoints.
|
||
|
||
\\{gud-breakpoints-mode-map}"
|
||
(setq major-mode 'gud-breakpoints-mode)
|
||
(setq mode-name "Breakpoints")
|
||
(use-local-map gud-breakpoints-mode-map))
|
||
|
||
(if gud-breakpoints-mode-map
|
||
nil
|
||
(setq gud-breakpoints-mode-map (make-sparse-keymap))
|
||
(define-key gud-breakpoints-mode-map " " 'gud-toggle-bp-this-line)
|
||
(define-key gud-breakpoints-mode-map "d" 'gud-delete-bp-this-line))
|
||
|
||
;;
|
||
;; 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)))
|
||
(gud-display-buffer
|
||
(gdb-get-create-instance-buffer instance
|
||
'gdb-registers-buffer)))
|
||
|
||
|
||
;;; FIXME: This should only return true for buffers in the current instance
|
||
(defun gud-protected-buffer-p (buffer)
|
||
"Is BUFFER a buffer which we want to leave displayed?"
|
||
(save-excursion
|
||
(set-buffer buffer)
|
||
(or (eq gdb-buffer-type 'gdb-registers-buffer)
|
||
(eq gdb-buffer-type 'gdb-breakpoints-buffer)
|
||
(eq gdb-buffer-type 'gdb-frames-buffer)
|
||
(eq gdb-buffer-type 'gud))))
|
||
;;;
|
||
;;; The way we abuse the dedicated-p flag is pretty gross, but seems
|
||
;;; to do the right thing. Seeing as there is no way for Lisp code to
|
||
;;; get at the use_time field of a window, I'm not sure there exists a
|
||
;;; more elegant solution without writing C code.
|
||
|
||
(defun gud-display-buffer (buf)
|
||
(let ((must-split nil))
|
||
(unwind-protect
|
||
(progn
|
||
(walk-windows
|
||
'(lambda (win)
|
||
(if (gud-protected-buffer-p (window-buffer win))
|
||
(set-window-dedicated-p win t)
|
||
)))
|
||
;; This is more or less just the same as display-buffer; the
|
||
;; big difference is that we split the largest window rather
|
||
;; than the lru window. Various settings and hair which
|
||
;; display-buffer has are omitted, for simplicity.
|
||
(if (not (get-buffer-window buf nil))
|
||
(let ((window (get-lru-window nil)))
|
||
(if window
|
||
(set-window-buffer window buf)
|
||
(setq must-split t)
|
||
)))
|
||
)
|
||
(walk-windows
|
||
'(lambda (win)
|
||
(if (gud-protected-buffer-p (window-buffer win))
|
||
(set-window-dedicated-p win nil)
|
||
)))
|
||
)
|
||
(if must-split
|
||
(set-window-buffer (split-window (get-largest-window)) buf))
|
||
))
|
||
|
||
(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)
|
||
"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 (gud-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
|