(find_field): Fix comment.

[gnu-emacs] / src / .gdbinit

# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000, 2001,
#   2004, 2005, 2006 Free Software Foundation, Inc.
#
# This file is part of GNU Emacs.
#
# GNU Emacs is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# GNU Emacs is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GNU Emacs; see the file COPYING.  If not, write to the
# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
# Boston, MA 02110-1301, USA.

# Force loading of symbols, enough to give us gdb_valbits etc.
set main

# Find lwlib source files too.
dir ../lwlib
#dir /gd/gnu/lesstif-0.89.9/lib/Xm

# Don't enter GDB when user types C-g to quit.
# This has one unfortunate effect: you can't type C-c
# at the GDB to stop Emacs, when using X.
# However, C-z works just as well in that case.
handle 2 noprint pass

# Make it work like SIGINT normally does.
handle SIGTSTP nopass

# Don't pass SIGALRM to Emacs.  This makes problems when
# debugging.
handle SIGALRM ignore

# $valmask and $tagmask are mask values set up by the xreload macro below.

# Use $bugfix so that the value isn't a constant.
# Using a constant runs into GDB bugs sometimes.
define xgetptr
  set $bugfix = $arg0
  set $ptr = (gdb_use_union ? $bugfix.u.val : $bugfix & $valmask) | gdb_data_seg_bits
end

define xgetint
  set $bugfix = $arg0
  set $int = gdb_use_union ? $bugfix.s.val : (gdb_use_lsb ? $bugfix : $bugfix << gdb_gctypebits) >> gdb_gctypebits
end

define xgettype
  set $bugfix = $arg0
  set $type = gdb_use_union ? $bugfix.s.type : (enum Lisp_Type) (gdb_use_lsb ? $bugfix & $tagmask : $bugfix >> gdb_valbits)
end

# Set up something to print out s-expressions.
# We save and restore print_output_debug_flag to prevent the w32 port
# from calling OutputDebugString, which causes GDB to display each
# character twice (yuk!).
define pr
  set $output_debug = print_output_debug_flag
  set print_output_debug_flag = 0
  set debug_print ($)
  set print_output_debug_flag = $output_debug
end
document pr
Print the emacs s-expression which is $.
Works only when an inferior emacs is executing.
end

# Print out s-expressions
define pp
  set $tmp = $arg0
  set $output_debug = print_output_debug_flag
  set print_output_debug_flag = 0
  set safe_debug_print ($tmp)
  set print_output_debug_flag = $output_debug
end
document pp
Print the argument as an emacs s-expression
Works only when an inferior emacs is executing.
end

# Print out s-expressions from tool bar
define pp1
  set $tmp = $arg0
  echo $arg0
  printf " = "
  set $output_debug = print_output_debug_flag
  set print_output_debug_flag = 0
  set safe_debug_print ($tmp)
  set print_output_debug_flag = $output_debug
end
document pp1
Print the argument as an emacs s-expression
Works only when an inferior emacs is executing.
For use on tool bar when debugging in Emacs
where the variable name would not otherwise
be recorded in the GUD buffer.
end

# Print value of lisp variable
define pv
  set $tmp = "$arg0"
  set $output_debug = print_output_debug_flag
  set print_output_debug_flag = 0
  set safe_debug_print ( find_symbol_value (intern ($tmp)))
  set print_output_debug_flag = $output_debug
end
document pv
Print the value of the lisp variable given as argument.
Works only when an inferior emacs is executing.
end

# Print value of lisp variable
define pv1
  set $tmp = "$arg0"
  echo $arg0
  printf " = "
  set $output_debug = print_output_debug_flag
  set print_output_debug_flag = 0
  set safe_debug_print (find_symbol_value (intern ($tmp)))
  set print_output_debug_flag = $output_debug
end
document pv1
Print the value of the lisp variable given as argument.
Works only when an inferior emacs is executing.
For use on tool bar when debugging in Emacs
where the variable name would not otherwise
be recorded in the GUD buffer.
end

# Print out current buffer point and boundaries
define ppt
  set $b = current_buffer
  set $t = $b->text
  printf "BUF PT: %d", $b->pt
  if ($b->pt != $b->pt_byte)
    printf "[%d]", $b->pt_byte
  end
  printf " of 1..%d", $t->z
  if ($t->z != $t->z_byte)
    printf "[%d]", $t->z_byte
  end
  if ($b->begv != 1 || $b->zv != $t->z)
    printf " NARROW=%d..%d", $b->begv, $b->zv
    if ($b->begv != $b->begv_byte || $b->zv != $b->zv_byte)
      printf " [%d..%d]", $b->begv_byte, $b->zv_byte
    end
  end
  printf " GAP: %d", $t->gpt
  if ($t->gpt != $t->gpt_byte)
    printf "[%d]", $t->gpt_byte
  end
  printf " SZ=%d\n", $t->gap_size
end
document ppt
Print point, beg, end, narrow, and gap for current buffer.
end

# Print out iterator given as first arg
define pitx
  set $it = $arg0
  printf "cur=%d", $it->current.pos.charpos
  if ($it->current.pos.charpos != $it->current.pos.bytepos)
    printf "[%d]", $it->current.pos.bytepos
  end
  printf " start=%d", $it->start.pos.charpos
  if ($it->start.pos.charpos != $it->start.pos.bytepos)
    printf "[%d]", $it->start.pos.bytepos
  end
  printf " end=%d", $it->end_charpos
  printf " stop=%d", $it->stop_charpos
  printf " face=%d", $it->face_id
  if ($it->multibyte_p)
    printf " MB"
  end
  if ($it->header_line_p)
    printf " HL"
  end
  if ($it->n_overlay_strings > 0)
    printf " nov=%d", $it->n_overlay_strings
  end
  if ($it->sp != 0)
    printf " sp=%d", $it->sp
  end
  if ($it->what == IT_CHARACTER)
    if ($it->len == 1 && $it->c >= ' ' && it->c < 255)
      printf " ch='%c'", $it->c
    else
      printf " ch=[%d,%d]", $it->c, $it->len
    end
  else
    if ($it->what == IT_IMAGE)
      printf " IMAGE=%d", $it->image_id
    else
      printf " "
      output $it->what
    end
  end
  if ($it->method != GET_FROM_BUFFER)
    printf " next="
    output $it->method
    if ($it->method == GET_FROM_STRING)
      printf "[%d]", $it->current.string_pos.charpos
    end
  end
  printf "\n"
  if ($it->region_beg_charpos >= 0)
    printf "reg=%d-%d ", $it->region_beg_charpos, $it->region_end_charpos
  end
  printf "vpos=%d hpos=%d", $it->vpos, $it->hpos,
  printf " y=%d lvy=%d", $it->current_y, $it->last_visible_y
  printf " x=%d vx=%d-%d", $it->current_x, $it->first_visible_x, $it->last_visible_x
  printf " a+d=%d+%d=%d", $it->ascent, $it->descent, $it->ascent+$it->descent
  printf " max=%d+%d=%d", $it->max_ascent, $it->max_descent, $it->max_ascent+$it->max_descent
  printf "\n"
end
document pitx
Pretty print a display iterator.
Take one arg, an iterator object or pointer.
end

define pit
  pitx it
end
document pit
Pretty print the display iterator it.
end

define prowx
  set $row = $arg0
  printf "y=%d x=%d pwid=%d", $row->y, $row->x, $row->pixel_width
  printf " a+d=%d+%d=%d", $row->ascent, $row->height-$row->ascent, $row->height
  printf " phys=%d+%d=%d", $row->phys_ascent, $row->phys_height-$row->phys_ascent, $row->phys_height
  printf " vis=%d", $row->visible_height
  printf "  L=%d T=%d R=%d", $row->used[0], $row->used[1], $row->used[2]
  printf "\n"
  printf "start=%d end=%d", $row->start.pos.charpos, $row->end.pos.charpos
  if ($row->enabled_p)
    printf " ENA"
  end
  if ($row->displays_text_p)
    printf " DISP"
  end
  if ($row->mode_line_p)
    printf " MODEL"
  end
  if ($row->continued_p)
    printf " CONT"
  end
  if ($row-> truncated_on_left_p)
    printf " TRUNC:L"
  end
  if ($row-> truncated_on_right_p)
    printf " TRUNC:R"
  end
  if ($row->starts_in_middle_of_char_p)
    printf " STARTMID"
  end
  if ($row->ends_in_middle_of_char_p)
    printf " ENDMID"
  end
  if ($row->ends_in_newline_from_string_p)
    printf " ENDNLFS"
  end
  if ($row->ends_at_zv_p)
    printf " ENDZV"
  end
  if ($row->overlapped_p)
    printf " OLAPD"
  end
  if ($row->overlapping_p)
    printf " OLAPNG"
  end
  printf "\n"
end
document prowx
Pretty print information about glyph_row.
Takes one argument, a row object or pointer.
end

define prow
  prowx row
end
document prow
Pretty print information about glyph_row in row.
end


define pcursorx
  set $cp = $arg0
  printf "y=%d x=%d vpos=%d hpos=%d", $cp->y, $cp->x, $cp->vpos, $cp->hpos
end
document pcursorx
Pretty print a window cursor
end

define pcursor
  printf "output: "
  pcursorx output_cursor
  printf "\n"
end
document pcursor
Pretty print the output_cursor
end

define pwinx
  set $w = $arg0
  xgetint $w->sequence_number
  if ($w->mini_p != Qnil)
    printf "Mini "
  end
  printf "Window %d ", $int
  xgetptr $w->buffer
  set $tem = (struct buffer *) $ptr
  xgetptr $tem->name
  printf "%s", ((struct Lisp_String *) $ptr)->data
  printf "\n"
  xgetptr $w->start
  set $tem = (struct Lisp_Marker *) $ptr
  printf "start=%d end:", $tem->charpos
  if ($w->window_end_valid != Qnil)
    xgetint $w->window_end_pos
    printf "pos=%d", $int
    xgetint $w->window_end_vpos
    printf " vpos=%d", $int
  else
    printf "invalid"
  end
  printf " vscroll=%d", $w->vscroll
  if ($w->force_start != Qnil)
    printf " FORCE_START"
  end
  if ($w->must_be_updated_p)
    printf " MUST_UPD"
  end
  printf "\n"
  printf "cursor: "
  pcursorx $w->cursor
  printf "  phys: "
  pcursorx $w->phys_cursor
  if ($w->phys_cursor_on_p)
    printf " ON"
  else
    printf " OFF"
  end
  printf " blk="
  if ($w->last_cursor_off_p != $w->cursor_off_p)
    if ($w->last_cursor_off_p)
      printf "ON->"
    else
      printf "OFF->"
    end
  end
  if ($w->cursor_off_p)
    printf "ON"
  else
    printf "OFF"
  end
  printf "\n"
end
document pwinx
Pretty print a window structure.
Takes one argument, a pointer to a window structure
end

define pwin
  pwinx w
end
document pwin
Pretty print window structure w.
end


define xtype
  xgettype $
  output $type
  echo \n
  if $type == Lisp_Misc
    xmisctype
  else
    if $type == Lisp_Vectorlike
      xvectype
    end
  end
end
document xtype
Print the type of $, assuming it is an Emacs Lisp value.
If the first type printed is Lisp_Vector or Lisp_Misc,
a second line gives the more precise type.
end

define xvectype
  xgetptr $
  set $size = ((struct Lisp_Vector *) $ptr)->size
  output ($size & PVEC_FLAG) ? (enum pvec_type) ($size & PVEC_TYPE_MASK) : $size & ~gdb_array_mark_flag
  echo \n
end
document xvectype
Print the size or vector subtype of $, assuming it is a vector or pseudovector.
end

define xmisctype
  xgetptr $
  output (enum Lisp_Misc_Type) (((struct Lisp_Free *) $ptr)->type)
  echo \n
end
document xmisctype
Print the specific type of $, assuming it is some misc type.
end

define xint
  xgetint $
  print $int
end
document xint
Print $, assuming it is an Emacs Lisp integer.  This gets the sign right.
end

define xptr
  xgetptr $
  print (void *) $ptr
end
document xptr
Print the pointer portion of $, assuming it is an Emacs Lisp value.
end

define xmarker
  xgetptr $
  print (struct Lisp_Marker *) $ptr
end
document xmarker
Print $ as a marker pointer, assuming it is an Emacs Lisp marker value.
end

define xoverlay
  xgetptr $
  print (struct Lisp_Overlay *) $ptr
end
document xoverlay
Print $ as a overlay pointer, assuming it is an Emacs Lisp overlay value.
end

define xmiscfree
  xgetptr $
  print (struct Lisp_Free *) $ptr
end
document xmiscfree
Print $ as a misc free-cell pointer, assuming it is an Emacs Lisp Misc value.
end

define xintfwd
  xgetptr $
  print (struct Lisp_Intfwd *) $ptr
end
document xintfwd
Print $ as an integer forwarding pointer, assuming it is an Emacs Lisp Misc value.
end

define xboolfwd
  xgetptr $
  print (struct Lisp_Boolfwd *) $ptr
end
document xboolfwd
Print $ as a boolean forwarding pointer, assuming it is an Emacs Lisp Misc value.
end

define xobjfwd
  xgetptr $
  print (struct Lisp_Objfwd *) $ptr
end
document xobjfwd
Print $ as an object forwarding pointer, assuming it is an Emacs Lisp Misc value.
end

define xbufobjfwd
  xgetptr $
  print (struct Lisp_Buffer_Objfwd *) $ptr
end
document xbufobjfwd
Print $ as a buffer-local object forwarding pointer, assuming it is an Emacs Lisp Misc value.
end

define xkbobjfwd
  xgetptr $
  print (struct Lisp_Kboard_Objfwd *) $ptr
end
document xkbobjfwd
Print $ as a kboard-local object forwarding pointer, assuming it is an Emacs Lisp Misc value.
end

define xbuflocal
  xgetptr $
  print (struct Lisp_Buffer_Local_Value *) $ptr
end
document xbuflocal
Print $ as a buffer-local-value pointer, assuming it is an Emacs Lisp Misc value.
end

define xsymbol
  set $sym = $
  xgetptr $sym
  print (struct Lisp_Symbol *) $ptr
  xprintsym $sym
  echo \n
end
document xsymbol
Print the name and address of the symbol $.
This command assumes that $ is an Emacs Lisp symbol value.
end

define xstring
  xgetptr $
  print (struct Lisp_String *) $ptr
  xprintstr $
  echo \n
end
document xstring
Print the contents and address of the string $.
This command assumes that $ is an Emacs Lisp string value.
end

define xvector
  xgetptr $
  print (struct Lisp_Vector *) $ptr
  output ($->size > 50) ? 0 : ($->contents[0])@($->size & ~gdb_array_mark_flag)
echo \n
end
document xvector
Print the contents and address of the vector $.
This command assumes that $ is an Emacs Lisp vector value.
end

define xprocess
  xgetptr $
  print (struct Lisp_Process *) $ptr
  output *$
  echo \n
end
document xprocess
Print the address of the struct Lisp_process which the Lisp_Object $ points to.
end

define xframe
  xgetptr $
  print (struct frame *) $ptr
end
document xframe
Print $ as a frame pointer, assuming it is an Emacs Lisp frame value.
end

define xcompiled
  xgetptr $
  print (struct Lisp_Vector *) $ptr
  output ($->contents[0])@($->size & 0xff)
end
document xcompiled
Print $ as a compiled function pointer, assuming it is an Emacs Lisp compiled value.
end

define xwindow
  xgetptr $
  print (struct window *) $ptr
  set $window = (struct window *) $ptr
  xgetint $window->total_cols
  set $width=$int
  xgetint $window->total_lines
  set $height=$int
  xgetint $window->left_col
  set $left=$int
  xgetint $window->top_line
  set $top=$int
  printf "%dx%d+%d+%d\n", $width, $height, $left, $top
end
document xwindow
Print $ as a window pointer, assuming it is an Emacs Lisp window value.
Print the window's position as "WIDTHxHEIGHT+LEFT+TOP".
end

define xwinconfig
  xgetptr $
  print (struct save_window_data *) $ptr
end
document xwinconfig
Print $ as a window configuration pointer, assuming it is an Emacs Lisp window configuration value.
end

define xsubr
  xgetptr $
  print (struct Lisp_Subr *) $ptr
  output *$
  echo \n
end
document xsubr
Print the address of the subr which the Lisp_Object $ points to.
end

define xchartable
  xgetptr $
  print (struct Lisp_Char_Table *) $ptr
  printf "Purpose: "
  xprintsym $->purpose
  printf "  %d extra slots", ($->size & 0x1ff) - 388
  echo \n
end
document xchartable
Print the address of the char-table $, and its purpose.
This command assumes that $ is an Emacs Lisp char-table value.
end

define xboolvector
  xgetptr $
  print (struct Lisp_Bool_Vector *) $ptr
  output ($->size > 256) ? 0 : ($->data[0])@((($->size & ~gdb_array_mark_flag) + 7)/ 8)
  echo \n
end
document xboolvector
Print the contents and address of the bool-vector $.
This command assumes that $ is an Emacs Lisp bool-vector value.
end

define xbuffer
  xgetptr $
  print (struct buffer *) $ptr
  xgetptr $->name
  output ((struct Lisp_String *) $ptr)->data
  echo \n
end
document xbuffer
Set $ as a buffer pointer, assuming it is an Emacs Lisp buffer value.
Print the name of the buffer.
end

define xhashtable
  xgetptr $
  print (struct Lisp_Hash_Table *) $ptr
end
document xhashtable
Set $ as a hash table pointer, assuming it is an Emacs Lisp hash table value.
end

define xcons
  xgetptr $
  print (struct Lisp_Cons *) $ptr
  output/x *$
  echo \n
end
document xcons
Print the contents of $, assuming it is an Emacs Lisp cons.
end

define nextcons
  p $.u.cdr
  xcons
end
document nextcons
Print the contents of the next cell in a list.
This assumes that the last thing you printed was a cons cell contents
(type struct Lisp_Cons) or a pointer to one.
end
define xcar
  xgetptr $
  xgettype $
  print/x ($type == Lisp_Cons ? ((struct Lisp_Cons *) $ptr)->car : 0)
end
document xcar
Print the car of $, assuming it is an Emacs Lisp pair.
end

define xcdr
  xgetptr $
  xgettype $
  print/x ($type == Lisp_Cons ? ((struct Lisp_Cons *) $ptr)->u.cdr : 0)
end
document xcdr
Print the cdr of $, assuming it is an Emacs Lisp pair.
end

define xfloat
  xgetptr $
  print ((struct Lisp_Float *) $ptr)->u.data
end
document xfloat
Print $ assuming it is a lisp floating-point number.
end

define xscrollbar
  xgetptr $
  print (struct scrollbar *) $ptr
output *$
echo \n
end
document xscrollbar
Print $ as a scrollbar pointer.
end

define xprintstr
  set $data = $arg0->data
  output ($arg0->size > 1000) ? 0 : ($data[0])@($arg0->size_byte < 0 ? $arg0->size & ~gdb_array_mark_flag : $arg0->size_byte)
end

define xprintsym
  xgetptr $arg0
  set $sym = (struct Lisp_Symbol *) $ptr
  xgetptr $sym->xname
  set $sym_name = (struct Lisp_String *) $ptr
  xprintstr $sym_name
end
document xprintsym
  Print argument as a symbol.
end

define xbacktrace
  set $bt = backtrace_list
  while $bt
    xgettype (*$bt->function)
    if $type == Lisp_Symbol
      xprintsym (*$bt->function)
      echo \n
    else
      printf "0x%x ", *$bt->function
      if $type == Lisp_Vectorlike
        xgetptr (*$bt->function)
        set $size = ((struct Lisp_Vector *) $ptr)->size
        output ($size & PVEC_FLAG) ? (enum pvec_type) ($size & PVEC_TYPE_MASK) : $size & ~gdb_array_mark_flag
      else
        printf "Lisp type %d", $type
      end
      echo \n
    end
    set $bt = $bt->next
  end
end
document xbacktrace
  Print a backtrace of Lisp function calls from backtrace_list.
  Set a breakpoint at Fsignal and call this to see from where
  an error was signaled.
end

# Show Lisp backtrace after normal backtrace.
define hookpost-backtrace
  set $bt = backtrace_list
  if $bt
    echo \n
    echo Lisp Backtrace:\n
    xbacktrace
  end
end

define xreload
  set $tagmask = (((long)1 << gdb_gctypebits) - 1)
  set $valmask = gdb_use_lsb ? ~($tagmask) : ((long)1 << gdb_valbits) - 1
end
document xreload
  When starting Emacs a second time in the same gdb session under
  FreeBSD 2.2.5, gdb 4.13, $valmask have lost
  their values.  (The same happens on current (2000) versions of GNU/Linux
  with gdb 5.0.)
  This function reloads them.
end
xreload

# Flush display (X only)
define ff
  set x_flush (0)
end
document ff
Flush pending X window display updates to screen.
Works only when an inferior emacs is executing.
end


define hook-run
  xreload
end

# Call xreload if a new Emacs executable is loaded.
define hookpost-run
  xreload
end

set print pretty on
set print sevenbit-strings

show environment DISPLAY
show environment TERM
set args -geometry 80x40+0+0

# People get bothered when they see messages about non-existent functions...
xgetptr Vsystem_type
# $ptr is NULL in temacs
if ($ptr != 0)
  set $tem = (struct Lisp_Symbol *) $ptr
  xgetptr $tem->xname
  set $tem = (struct Lisp_String *) $ptr
  set $tem = (char *) $tem->data

  # Don't let abort actually run, as it will make stdio stop working and
  # therefore the `pr' command above as well.
  if $tem[0] == 'w' && $tem[1] == 'i' && $tem[2] == 'n' && $tem[3] == 'd'
    # The windows-nt build replaces abort with its own function.
    break w32_abort
  else
    break abort
  end
end

# x_error_quitter is defined only on X.  But window-system is set up
# only at run time, during Emacs startup, so we need to defer setting
# the breakpoint.  init_sys_modes is the first function called on
# every platform after init_display, where window-system is set.
tbreak init_sys_modes
commands
  silent
  xgetptr Vwindow_system
  set $tem = (struct Lisp_Symbol *) $ptr
  xgetptr $tem->xname
  set $tem = (struct Lisp_String *) $ptr
  set $tem = (char *) $tem->data
  # If we are running in synchronous mode, we want a chance to look
  # around before Emacs exits.  Perhaps we should put the break
  # somewhere else instead...
  if $tem[0] == 'x' && $tem[1] == '\0'
    break x_error_quitter
  end
  continue
end
# arch-tag: 12f34321-7bfa-4240-b77a-3cd3a1696dfe