Avoid bidi-related crashes in Cperl Mode.

[emacs.git] / src / .gdbinit

# Copyright (C) 1992-1998, 2000-2011  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 3, 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
# With some compilers, we need this to give us struct Lisp_Symbol etc.:
set Fmake_symbol

# 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

# Pass on user signals
handle SIGUSR1 noprint pass
handle SIGUSR2 noprint pass

# 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 ? (gdb_use_lsb ? $bugfix.u.val << gdb_gctypebits : $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
  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"
  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 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 current buffer's point and boundaries.
Prints values of point, beg, end, narrow, and gap for current buffer.
end

define pitmethod
  set $itmethod = $arg0
  # output $itmethod
  if ($itmethod == 0)
    printf "GET_FROM_BUFFER"
  end
  if ($itmethod == 1)
    printf "GET_FROM_DISPLAY_VECTOR"
  end
  if ($itmethod == 2)
    printf "GET_FROM_STRING"
  end
  if ($itmethod == 3)
    printf "GET_FROM_C_STRING"
  end
  if ($itmethod == 4)
    printf "GET_FROM_IMAGE"
  end
  if ($itmethod == 5)
    printf "GET_FROM_STRETCH"
  end
  if ($itmethod < 0 || $itmethod > 5)
    output $itmethod
  end
end
document pitmethod
Pretty print it->method given as first arg
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 " pos=%d", $it->position.charpos
  if ($it->position.charpos != $it->position.bytepos)
    printf "[%d]", $it->position.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", $it->sp
  end
  # IT_CHARACTER
  if ($it->what == 0)
    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
    printf " "
    # output $it->what
    if ($it->what == 0)
      printf "IT_CHARACTER"
    end
    if ($it->what == 1)
      printf "IT_COMPOSITION"
    end
    if ($it->what == 2)
      printf "IT_IMAGE"
    end
    if ($it->what == 3)
      printf "IT_STRETCH"
    end
    if ($it->what == 4)
      printf "IT_EOB"
    end
    if ($it->what == 5)
      printf "IT_TRUNCATION"
    end
    if ($it->what == 6)
      printf "IT_CONTINUATION"
    end
    if ($it->what < 0 || $it->what > 6)
      output $it->what
    end
  end
  if ($it->method != 0)
    # !GET_FROM_BUFFER
    printf " next="
    pitmethod $it->method
    if ($it->method == 2)
      # GET_FROM_STRING
      printf "[%d]", $it->current.string_pos.charpos
    end
    if ($it->method == 4)
      # GET_FROM_IMAGE
      printf "[%d]", $it->image_id
    end
  end
  printf "\n"
  if ($it->bidi_p)
    printf "BIDI: base_stop=%d prev_stop=%d level=%d\n", $it->base_level_stop, $it->prev_stop, $it->bidi_it.resolved_level
  end
  if ($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 " w=%d", $it->pixel_width
  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"
  set $i = 0
  while ($i < $it->sp && $i < 4)
    set $e = $it->stack[$i]
    printf "stack[%d]: ", $i
    pitmethod $e->method
    printf "[%d]", $e->position.charpos
    printf "\n"
    set $i = $i + 1
  end
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 pbiditype
  if ($arg0 == 0)
    printf "UNDEF"
  end
  if ($arg0 == 1)
    printf "L"
  end
  if ($arg0 == 2)
    printf "R"
  end
  if ($arg0 == 3)
    printf "EN"
  end
  if ($arg0 == 4)
    printf "AN"
  end
  if ($arg0 == 5)
    printf "BN"
  end
  if ($arg0 == 6)
    printf "B"
  end
  if ($arg0 < 0 || $arg0 > 6)
    printf "%d??", $arg0
  end
end
document pbiditype
Print textual description of bidi type given as first argument.
end

define pgx
  set $g = $arg0
  # CHAR_GLYPH
  if ($g->type == 0)
    if ($g->u.ch >= ' ' && $g->u.ch < 127)
      printf "CHAR[%c]", $g->u.ch
    else
      printf "CHAR[0x%x]", $g->u.ch
    end
  end
  # COMPOSITE_GLYPH
  if ($g->type == 1)
    printf "COMP[%d (%d..%d)]", $g->u.cmp.id, $g->slice.cmp.from, $g->slice.cmp.to
  end
  # GLYPHLESS_GLYPH
  if ($g->type == 2)
    printf "GLYPHLESS["
    if ($g->u.glyphless.method == 0)
      printf "THIN]"
    end
    if ($g->u.glyphless.method == 1)
      printf "EMPTY]"
    end
    if ($g->u.glyphless.method == 2)
      printf "ACRO]"
    end
    if ($g->u.glyphless.method == 3)
      printf "HEX]"
    end
  end
  # IMAGE_GLYPH
  if ($g->type == 3)
    printf "IMAGE[%d]", $g->u.img_id
  end
  # STRETCH_GLYPH
  if ($g->type == 4)
    printf "STRETCH[%d+%d]", $g->u.stretch.height, $g->u.stretch.ascent
  end
  xgettype ($g->object)
  if ($type == Lisp_String)
    printf " str=%x[%d]", $g->object, $g->charpos
  else
    printf " pos=%d", $g->charpos
  end
  # For characters, print their resolved level and bidi type
  if ($g->type == 0)
    printf " blev=%d,btyp=", $g->resolved_level
    pbiditype $g->bidi_type
  end
  printf " w=%d a+d=%d+%d", $g->pixel_width, $g->ascent, $g->descent
  # If not DEFAULT_FACE_ID
  if ($g->face_id != 0)
    printf " face=%d", $g->face_id
  end
  if ($g->voffset)
    printf " vof=%d", $g->voffset
  end
  if ($g->multibyte_p)
    printf " MB"
  end
  if ($g->padding_p)
    printf " PAD"
  end
  if ($g->glyph_not_available_p)
    printf " N/A"
  end
  if ($g->overlaps_vertically_p)
    printf " OVL"
  end
  if ($g->avoid_cursor_p)
    printf " AVOID"
  end
  if ($g->left_box_line_p)
    printf " ["
  end
  if ($g->right_box_line_p)
    printf " ]"
  end
  if ($g->slice.img.x || $g->slice.img.y || $g->slice.img.width || $g->slice.img.height)
    printf " slice=%d,%d,%d,%d" ,$g->slice.img.x, $g->slice.img.y, $g->slice.img.width, $g->slice.img.height
  end
  printf "\n"
end
document pgx
Pretty print a glyph structure.
Takes one argument, a pointer to a glyph structure.
end

define pg
  set $pgidx = 0
  pgx glyph
end
document pg
Pretty print glyph structure glyph.
end

define pgi
  set $pgidx = $arg0
  pgx (&glyph[$pgidx])
end
document pgi
Pretty print glyph structure glyph[I].
Takes one argument, a integer I.
end

define pgn
  set $pgidx = $pgidx + 1
  pgx (&glyph[$pgidx])
end
document pgn
Pretty print next glyph structure.
end

define pgrowx
  set $row = $arg0
  set $area = 0
  set $xofs = $row->x
  while ($area < 3)
    set $used = $row->used[$area]
    if ($used > 0)
      set $gl0 = $row->glyphs[$area]
      set $pgidx = 0
      printf "%s: %d glyphs\n", ($area == 0 ? "LEFT" : $area == 2 ? "RIGHT" : "TEXT"), $used
      while ($pgidx < $used)
        printf "%3d %4d: ", $pgidx, $xofs
        pgx $gl0[$pgidx]
        set $xofs = $xofs + $gl0[$pgidx]->pixel_width
        set $pgidx = $pgidx + 1
      end
    end
    set $area = $area + 1
  end
end
document pgrowx
Pretty print all glyphs in a row structure.
Takes one argument, a pointer to a row structure.
end

define pgrow
  pgrowx row
end
document pgrow
Pretty print all glyphs in row structure row.
end

define pgrowit
  pgrowx it->glyph_row
end
document pgrowit
Pretty print all glyphs in it->glyph_row.
end

define prowlims
  printf "edges=(%d,%d),r2l=%d,cont=%d,trunc=(%d,%d),at_zv=%d\n", $arg0->minpos.charpos, $arg0->maxpos.charpos, $arg0->reversed_p, $arg0->continued_p, $arg0->truncated_on_left_p, $arg0->truncated_on_right_p, $arg0->ends_at_zv_p
end
document prowlims
Print important attributes of a glyph_row structure.
Takes one argument, a pointer to a glyph_row structure.
end

define pmtxrows
  set $mtx = $arg0
  set $gl = $mtx->rows
  set $glend = $mtx->rows + $mtx->nrows - 1
  set $i = 0
  while ($gl < $glend)
    printf "%d: ", $i
    prowlims $gl
    set $gl = $gl + 1
    set $i = $i + 1
  end
end
document pmtxrows
Print data about glyph rows in a glyph matrix.
Takes one argument, a pointer to a glyph_matrix structure.
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 $.
This command assumes that $ is a vector or pseudovector.
end

define xmisctype
  xgetptr $
  output (enum Lisp_Misc_Type) (((struct Lisp_Free *) $ptr)->type)
  echo \n
end
document xmisctype
Assume that $ is some misc type and print its specific type.
end

define xint
  xgetint $
  print $int
end
document xint
Print $ as an Emacs Lisp integer.  This gets the sign right.
end

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

define xmarker
  xgetptr $
  print (struct Lisp_Marker *) $ptr
end
document xmarker
Print $ as a marker pointer.
This command assumes that $ is an Emacs Lisp marker value.
end

define xoverlay
  xgetptr $
  print (struct Lisp_Overlay *) $ptr
end
document xoverlay
Print $ as a overlay pointer.
This command assumes that $ 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.
This command assumes that $ is an Emacs Lisp Misc value.
end

define xintfwd
  xgetptr $
  print (struct Lisp_Intfwd *) $ptr
end
document xintfwd
Print $ as an integer forwarding pointer.
This command assumes that $ is an Emacs Lisp Misc value.
end

define xboolfwd
  xgetptr $
  print (struct Lisp_Boolfwd *) $ptr
end
document xboolfwd
Print $ as a boolean forwarding pointer.
This command assumes that $ is an Emacs Lisp Misc value.
end

define xobjfwd
  xgetptr $
  print (struct Lisp_Objfwd *) $ptr
end
document xobjfwd
Print $ as an object forwarding pointer.
This command assumes that $ 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.
This command assumes that $ 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.
This command assumes that $ 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.
This command assumes that $ 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 to which $ points.
This command assumes that $ is a Lisp_Object.
end

define xframe
  xgetptr $
  print (struct frame *) $ptr
  xgetptr $->name
  set $ptr = (struct Lisp_String *) $ptr
  xprintstr $ptr
  echo \n
end
document xframe
Print $ as a frame pointer.
This command assumes $ 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.
This command assumes that $ 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.
This command assumes that $ 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) - 68
  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 xsubchartable
  xgetptr $
  print (struct Lisp_Sub_Char_Table *) $ptr
  xgetint $->depth
  set $depth = $int
  xgetint $->min_char
  printf "Depth: %d, Min char: %d (0x%x)\n", $depth, $int, $int
end
document xsubchartable
Print the address of the sub-char-table $, its depth and min-char.
This command assumes that $ is an Emacs Lisp sub-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 and the name of the buffer.
This command assumes $ is an Emacs Lisp buffer value.
end

define xhashtable
  xgetptr $
  print (struct Lisp_Hash_Table *) $ptr
end
document xhashtable
Set $ as a hash table pointer.
This command assumes that $ 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 $ as 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 command 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
Assume that $ is an Emacs Lisp pair and print its car.
end

define xcdr
  xgetptr $
  xgettype $
  print/x ($type == Lisp_Cons ? ((struct Lisp_Cons *) $ptr)->u.cdr : 0)
end
document xcdr
Assume that $ is an Emacs Lisp pair and print its cdr.
end

define xlist
  xgetptr $
  set $cons = (struct Lisp_Cons *) $ptr
  xgetptr Qnil
  set $nil = $ptr
  set $i = 0
  while $cons != $nil && $i < 10
    p/x $cons->car
    xpr
    xgetptr $cons->u.cdr
    set $cons = (struct Lisp_Cons *) $ptr
    set $i = $i + 1
    printf "---\n"
  end
  if $cons == $nil
    printf "nil\n"
  else
    printf "...\n"
    p $ptr
  end
end
document xlist
Print $ assuming it is a list.
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 xpr
  xtype
  if $type == Lisp_Int
    xint
  end
  if $type == Lisp_Symbol
    xsymbol
  end
  if $type == Lisp_String
    xstring
  end
  if $type == Lisp_Cons
    xcons
  end
  if $type == Lisp_Float
    xfloat
  end
  if $type == Lisp_Misc
    set $misc = (enum Lisp_Misc_Type) (((struct Lisp_Free *) $ptr)->type)
    if $misc == Lisp_Misc_Free
      xmiscfree
    end
    if $misc == Lisp_Misc_Boolfwd
      xboolfwd
    end
    if $misc == Lisp_Misc_Marker
      xmarker
    end
    if $misc == Lisp_Misc_Intfwd
      xintfwd
    end
    if $misc == Lisp_Misc_Boolfwd
      xboolfwd
    end
    if $misc == Lisp_Misc_Objfwd
      xobjfwd
    end
    if $misc == Lisp_Misc_Buffer_Objfwd
      xbufobjfwd
    end
    if $misc == Lisp_Misc_Buffer_Local_Value
      xbuflocal
    end
#    if $misc == Lisp_Misc_Some_Buffer_Local_Value
#      xvalue
#    end
    if $misc == Lisp_Misc_Overlay
      xoverlay
    end
    if $misc == Lisp_Misc_Kboard_Objfwd
      xkbobjfwd
    end
#    if $misc == Lisp_Misc_Save_Value
#      xsavevalue
#    end
  end
  if $type == Lisp_Vectorlike
    set $size = ((struct Lisp_Vector *) $ptr)->size
    if ($size & PVEC_FLAG)
      set $vec = (enum pvec_type) ($size & PVEC_TYPE_MASK)
      if $vec == PVEC_NORMAL_VECTOR
        xvector
      end
      if $vec == PVEC_PROCESS
        xprocess
      end
      if $vec == PVEC_FRAME
        xframe
      end
      if $vec == PVEC_COMPILED
        xcompiled
      end
      if $vec == PVEC_WINDOW
        xwindow
      end
      if $vec == PVEC_WINDOW_CONFIGURATION
        xwinconfig
      end
      if $vec == PVEC_SUBR
        xsubr
      end
      if $vec == PVEC_CHAR_TABLE
        xchartable
      end
      if $vec == PVEC_BOOL_VECTOR
        xboolvector
      end
      if $vec == PVEC_BUFFER
        xbuffer
      end
      if $vec == PVEC_HASH_TABLE
        xhashtable
      end
    else
      xvector
    end
  end
end
document xpr
Print $ as a lisp object of any type.
end

define xprintstr
  set $data = (char *) $arg0->data
  output ($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 xcoding
  set $tmp = (struct Lisp_Hash_Table *) ((Vcoding_system_hash_table & $valmask) | gdb_data_seg_bits)
  set $tmp = (struct Lisp_Vector *) (($tmp->key_and_value & $valmask) | gdb_data_seg_bits)
  set $name = $tmp->contents[$arg0 * 2]
  print $name
  pr
  print $tmp->contents[$arg0 * 2 + 1]
  pr
end
document xcoding
  Print the name and attributes of coding system that has ID (argument).
end

define xcharset
  set $tmp = (struct Lisp_Hash_Table *) ((Vcharset_hash_table & $valmask) | gdb_data_seg_bits)
  set $tmp = (struct Lisp_Vector *) (($tmp->key_and_value & $valmask) | gdb_data_seg_bits)
  p $tmp->contents[charset_table[$arg0].hash_index * 2]
  pr
end
document xcharset
  Print the name of charset that has ID (argument).
end

define xfontset
  xgetptr $
  set $tbl = (struct Lisp_Char_Table *) $ptr
  print $tbl
  xgetint $tbl->extras[0]
  printf " ID:%d", $int
  xgettype $tbl->extras[1]
  xgetptr $tbl->extras[1]
  if $type == Lisp_String
    set $ptr = (struct Lisp_String *) $ptr
    printf " Name:"
    xprintstr $ptr
  else
    xgetptr $tbl->extras[2]
    set $ptr = (struct Lisp_Char_Table *) $ptr
    xgetptr $ptr->extras[1]
    set $ptr = (struct Lisp_String *) $ptr
    printf " Realized from:"
    xprintstr $ptr
  end
  echo \n
end

define xfont
  xgetptr $
  set $size = (((struct Lisp_Vector *) $ptr)->size & 0x1FF)
  if $size == FONT_SPEC_MAX
    print (struct font_spec *) $ptr
  else
    if $size == FONT_ENTITY_MAX
      print (struct font_entity *) $ptr
    else
      print (struct font *) $ptr
    end
  end
end
document xfont
Print $ assuming it is a list font (font-spec, font-entity, or font-object).
end

define xbacktrace
  set $bt = backtrace_list
  while $bt
    xgettype (*$bt->function)
    if $type == Lisp_Symbol
      xprintsym (*$bt->function)
      printf " (0x%x)\n", $bt->args
    else
      xgetptr *$bt->function
      printf "0x%x ", $ptr
      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

define which
  set debug_print (which_symbols ($arg0))
end
document which
  Print symbols which references a given lisp object
  either as its symbol value or symbol function.
end

define xbytecode
  set $bt = byte_stack_list
  while $bt
    xgettype ($bt->byte_string)
    printf "0x%x => ", $bt->byte_string
    which $bt->byte_string
    set $bt = $bt->next
  end
end
document xbytecode
  Print a backtrace of the byte code stack.
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

# People get bothered when they see messages about non-existent functions...
xgetptr globals.f_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 globals.f_Vinitial_window_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