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[Emacs-diffs] Changes to emacs/man/building.texi
From: |
Richard M. Stallman |
Subject: |
[Emacs-diffs] Changes to emacs/man/building.texi |
Date: |
Wed, 28 May 2003 07:42:36 -0400 |
Index: emacs/man/building.texi
diff -c emacs/man/building.texi:1.29 emacs/man/building.texi:1.30
*** emacs/man/building.texi:1.29 Sun Apr 6 17:11:23 2003
--- emacs/man/building.texi Wed May 28 07:42:35 2003
***************
*** 288,293 ****
--- 288,296 ----
* Commands of GUD:: Key bindings for common commands.
* GUD Customization:: Defining your own commands for GUD.
* GUD Tooltips:: Showing variable values by pointing with the mouse.
+ * GDB Graphical Interface:: An enhanced mode that uses GDB features to
+ implement a graphical debugging environment through
+ Emacs.
@end menu
@node Starting GUD
***************
*** 303,308 ****
--- 306,315 ----
for input and output to GDB, and switches to it. If a GDB buffer
already exists, it just switches to that buffer.
+ @item M-x gdba @key{RET} @var{file} @key{RET}
+ Run GDB as a subprocess of Emacs, providing a graphical interface
+ to GDB features through Emacs. @xref{GDB Graphical Interface}.
+
@item M-x dbx @key{RET} @var{file} @key{RET}
@findex dbx
Similar, but run DBX instead of GDB.
***************
*** 478,483 ****
--- 485,505 ----
If you are using GDB, these additional key bindings are available:
@table @kbd
+ @item C-c C-r
+ @kindex C-c C-r @r{(GUD)}
+ @itemx C-x C-a C-r
+ @findex gud-run
+ Start execution of the program (@code{gud-run}).
+
+ @item C-c C-u
+ @kindex C-c C-u @r{(GUD)}
+ @itemx C-x C-a C-u
+ @findex gud-until
+ Continue execution to the current line. The program will run until
+ it hits a breakpoint, terminates, gets a signal that the debugger is
+ checking for, or reaches the line on which the cursor currently sits
+ (@code{gud-until}).
+
@item @key{TAB}
@kindex TAB @r{(GUD)}
@findex gud-gdb-complete-command
***************
*** 586,591 ****
--- 608,795 ----
variable values can be displayed in tooltips by pointing at them with
the mouse in the GUD buffer or in source buffers with major modes in the
customizable list @code{tooltip-gud-modes}.
+
+ @node GDB Graphical Interface
+ @subsection GDB Graphical Interface
+
+ @findex gdba
+ The command @code{gdba} starts GDB using a graphical interface where
+ you view and control the program's data using Emacs windows. You can
+ still interact with GDB through the GUD buffer, but the point of this
+ mode is that you can do it through menus and clicks, without needing
+ to know GDB commands.
+
+ @menu
+ * Breakpoints Buffer:: A breakpoint control panel.
+ * Stack Buffer:: Select a frame from the call stack.
+ * Data Display:: Display and update expressions in their own buffer.
+ * Display Buffer:: Control the displayed expressions.
+ * Other Buffers:: Input/output, locals, registers and assembler
buffers.
+ * Layout:: Control the number of displayed buffers.
+ @end menu
+
+ @node Breakpoints Buffer
+ @subsubsection Breakpoints Buffer
+
+ The breakpoints buffer shows the existing breakpoints and watchpoints
+ (@pxref{Breakpoints,,, gdb, The GNU debugger}). It has three special
+ commands:
+
+ @table @kbd
+ @item @key{SPC}
+ @kindex SPC @r{(GDB breakpoints buffer)}
+ @findex gdb-toggle-breakpoint
+ Enable/disable the breakpoint at the current line
+ (@code{gdb-toggle-breakpoint}). On a graphical display, this changes
+ the color of a bullet in the margin of the source buffer at the
+ relevant line. This is red when the breakpoint is enabled and grey
+ when it is disabled. Text-only terminals correspondingly display
+ a @samp{B} or @samp{b}.
+
+ @item @kbd{d}
+ @kindex d @r{(GDB breakpoints buffer)}
+ @findex gdb-delete-breakpoint
+ Delete the breakpoint at the current line (@code{gdb-delete-breakpoint}).
+
+ @item @key{RET}
+ @kindex RET @r{(GDB breakpoints buffer)}
+ @findex gdb-goto-breakpoint
+ Display the file in the source buffer at the breakpoint specified at
+ the current line (@code{gdb-goto-breakpoint}). Alternatively, click
@kbd{Mouse-2} on the breakpoint that you wish to visit.
+ @end table
+
+ @node Stack Buffer
+ @subsubsection Stack Buffer
+
+ The stack buffer displays a @dfn{call stack}, with one line for each
+ of the nested subroutine calls (@dfn{stack frames}) now active in the
+ program. @xref{Backtrace,,info stack, gdb, The GNU debugger}.
+
+ Move point to any frame in the stack and type @key{RET} to make it
+ become the current frame (@code{gdb-frames-select}) and display the
+ associated source in the source buffer. Alternatively, click
+ @kbd{Mouse-2} to make the selected frame become the current one. If the
+ locals buffer is displayed then its contents update to display the
+ variables that are local to the new frame.
+
+ @node Data Display
+ @subsubsection Data Display
+ @cindex displaying expressions in GDB
+
+ If you want to see how a variable changes each time your program stops
+ then place the cursor over the variable name and click on the display
+ icon in the toolbar (@code{gud-display}).
+
+ Each displayed expression has its own frame on a graphical display and
+ its own buffer on a text-only terminal. Arrays and structures have
+ their own display formats. To display an array as a slice, at the top
+ of the display window, click @kbd{Mouse-2} on the array index that you
+ want to restrict and you will be prompted in the mini-buffer for a
+ start and a stop value. Click @kbd{Mouse-2} on a pointer to
+ dereference it in the same frame/buffer. Click @kbd{S-Mouse-2} there
+ to do the same thing but in a new frame/buffer. There are two special
+ commands for these buffers:
+
+ @table @kbd
+ @item @kbd{v}
+ @kindex v @r{(GDB data buffer)}
+ @findex gdb-array-visualise
+ Visualise an array using the graph program from plotutils if this is
+ installed. This only works for one dimensional arrays
+ (@code{gdb-array-visualise}).
+
+ @item @kbd{q}
+ @kindex q @r{(GDB data buffer)}
+ @findex gdb-delete-expression
+ Delete the displayed expression and the associated frame
+ (@code{gdb-delete-expression}).
+ @end table
+
+ @node Display Buffer
+ @subsubsection Display Buffer
+
+ The display buffer shows the list of displayed expressions
+ (@pxref{Auto Display,,, gdb, The GNU debugger}). As with the
+ breakpoints, you can enable/disable or delete the displayed
+ expressions:
+
+ @table @kbd
+ @item @key{SPC}
+ @kindex SPC @r{(GDB display buffer)}
+ @findex gdb-toggle-display
+ Enable/disable the display at the current line
+ (@code{gdb-toggle-display}).
+
+ @item @kbd{d}
+ @kindex d @r{(GDB display buffer)}
+ @findex gdb-delete-display
+ Delete the display at the current line (@code{gdb-delete-display}).
+ @end table
+
+ @node Other Buffers
+ @subsubsection Other Buffers
+
+ @table @asis
+ @item Input/Output Buffer
+ The executable program that is being debugged takes its input and
+ displays its output here. Some of the commands from shell mode are
+ available here. @xref{Shell Mode}.
+
+ @item Locals Buffer
+ The locals buffer displays the values of local variables of the
+ current frame for simple data types (@pxref{Frame Info,,, gdb, The GNU
+ debugger}).
+
+ Arrays and structures display their type only. You must display them
+ separately to examine their values. @ref{Data Display}.
+
+ @item Registers Buffer
+ The registers buffer displays the values held by the registers
+ (@pxref{Registers,,, gdb, The GNU debugger}).
+
+ @item Assembler Buffer
+ The assembler buffer displays the current frame as machine code. An
+ overlay arrow points to the current instruction and you can set and
+ remove breakpoints as with the source buffer. Breakpoints also
+ appear in the margin.
+ @end table
+
+ @node Layout
+ @subsubsection Layout
+ @cindex GDB User Interface layout
+ You may choose to display the additional buffers described previously
+ either in the same frame or a different one. Select GDB-windows or
+ GDB-Frames from the menu-bar under the heading GUD. If the menu-bar
+ is unavailable, type @code{M-x
+ address@hidden or @code{M-x
+ address@hidden respectively, where @var{buffertype}
+ is the relevant buffer type e.g breakpoints.
+
+ @findex gdb-many-windows
+ @vindex gdb-many-windows
+ If @code{gdb-many-windows} is @code{nil} (the default value), then GDB starts
+ with just two windows: the GUD and the source buffer. If it is @code{t}, then
+ six windows with the following layout will appear:
+
+ @multitable @columnfractions .5 .5
+ @item GUD buffer (I/O of GDB)
+ @tab Locals buffer
+ @item
+ @tab
+ @item Source buffer
+ @tab Input/Output (of debuggee) buffer
+ @item
+ @tab
+ @item Stack buffer
+ @tab Breakpoints buffer
+ @end multitable
+
+ To toggle this layout, do @kbd{M-x gdb-many-windows}.
+
+ @findex gdb-restore-windows
+ If you change the window layout, for example, while editing and
+ re-compiling your program, then you can restore it with
+ @code{gdb-restore-windows}.
@node Executing Lisp
@section Executing Lisp Expressions
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