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bug#8562: Emacs 23.1 and later don't work in windows 98
From: |
Eli Zaretskii |
Subject: |
bug#8562: Emacs 23.1 and later don't work in windows 98 |
Date: |
Wed, 25 May 2011 00:28:34 -0400 |
> Date: Wed, 25 May 2011 04:01:22 +0200
> From: oslsachem <oslsachem@gmail.com>
> Cc: 8562@debbugs.gnu.org
>
> > If total_lines and total_cols get the right values here, then please
> > set a watchpoint on these fields, or step through the code between the
> > above and where it aborts, and see where they are reset to zero.
>
> http://www.speedyshare.com/files/28632428/Emacs-23.3GDBframe1.txt
This shows that my guess was wrong:
(gdb) frame 1
#1 0x01050284 in window_box_height (w=0x37f3c00) at xdisp.c:1104
1104 xassert (height >= 0);
(gdb) p height
$1 = -482614272
(gdb) p w->total_lines
$2 = 32
(gdb) p w->total_cols
$3 = 40
The problem is not the window dimensions, which look fine, but
something else. `height' is computed like this:
int height = WINDOW_TOTAL_HEIGHT (w);
WINDOW_TOTAL_HEIGHT is defined like this:
#define WINDOW_TOTAL_HEIGHT(W) \
(WINDOW_TOTAL_LINES (W) * WINDOW_FRAME_LINE_HEIGHT (W))
#define WINDOW_TOTAL_LINES(W) \
(XFASTINT ((W)->total_lines))
#define WINDOW_FRAME_LINE_HEIGHT(W) \
(FRAME_LINE_HEIGHT (WINDOW_XFRAME ((W))))
#define FRAME_LINE_HEIGHT(F) ((F)->line_height)
So the problem must be that FRAME_LINE_HEIGHT (WINDOW_XFRAME ((W)))
returns a negative value. Can you verify that? In frame #1, please
type "print f->line_height" and see if the value is negative or maybe a
large positive (which causes the multiplication in WINDOW_TOTAL_HEIGHT
to overflow).
If the value of f->line_height is indeed bogus, please put a
breakpoint in x_new_font, run Emacs again, and when the breakpoint
breaks, step through that function and see why it doesn't put a valid
value into this field. This should happen on line 5280 of w32term.c:
FRAME_LINE_HEIGHT (f) = font->height;
If this indeed assigns a bogus value, please show the contents of the
`font' structure ("print *font" at GDB prompt).
Thanks.
- bug#8562: Emacs 23.1 and later don't work in windows 98, oslsachem, 2011/05/05
- bug#8562: Emacs 23.1 and later don't work in windows 98, Eli Zaretskii, 2011/05/06
- bug#8562: Emacs 23.1 and later don't work in windows 98, Eli Zaretskii, 2011/05/06
- bug#8562: Emacs 23.1 and later don't work in windows 98, oslsachem, 2011/05/22
- bug#8562: Emacs 23.1 and later don't work in windows 98, Eli Zaretskii, 2011/05/23
- bug#8562: Emacs 23.1 and later don't work in windows 98, oslsachem, 2011/05/24
- bug#8562: Emacs 23.1 and later don't work in windows 98, Eli Zaretskii, 2011/05/24
- bug#8562: Emacs 23.1 and later don't work in windows 98, oslsachem, 2011/05/24
- bug#8562: Emacs 23.1 and later don't work in windows 98,
Eli Zaretskii <=
- bug#8562: Emacs 23.1 and later don't work in windows 98, oslsachem, 2011/05/25
- bug#8562: Emacs 23.1 and later don't work in windows 98, Eli Zaretskii, 2011/05/25
- bug#8562: Emacs 23.1 and later don't work in windows 98, oslsachem, 2011/05/25
- bug#8562: Emacs 23.1 and later don't work in windows 98, Eli Zaretskii, 2011/05/27
- bug#8562: Emacs 23.1 and later don't work in windows 98, oslsachem, 2011/05/27
- bug#8562: Emacs 23.1 and later don't work in windows 98, Eli Zaretskii, 2011/05/27
- bug#8562: Emacs 23.1 and later don't work in windows 98, oslsachem, 2011/05/27
- bug#8562: Emacs 23.1 and later don't work in windows 98, Eli Zaretskii, 2011/05/27
- bug#8562: Emacs 23.1 and later don't work in windows 98, oslsachem, 2011/05/27
- bug#8562: Emacs 23.1 and later don't work in windows 98, Eli Zaretskii, 2011/05/27