Wireshark · Ethereal-dev: Re: [ethereal-dev] AIX: gtk problem solved, now an ethereal problem

[Craig Rodrigues <rodrigc@xxxxxxxxxxxx>]

On Thu, Nov 11, 1999 at 11:50:23AM -0800, Guy Harris wrote:
> > The only differences between gtkclist.c in the gtk distribution and
> > gtkclist.c in the ethereal distribution relate to the ROW_ELEMENT
> > macro.  It looks like an optimization for retrieving the GList item
> > when the requested row is the last row in the list.
> 
> Yup - as per my other mail, Ethereal does that rather a lot when
> building the CList, and the optimization changes quadratic behavior to
> linear behavior.
> 
> > Any ideas why this causes trouble?
> 
> Mismatches between the layouts of data structures as declared in the
> "gtk/gtk*.h" files in the Ethereal source tree and the layouts as
> declared in the header files in the GTK+ source (either due to header
> file differences - although the header files appear to be identical to
> the GTK+ 1.2.6 ones - or due to compiler behavior differences)?

I tried stepping things through the debugger, and constantly
hit the same segfault inside gdk_string_width(), line 308 of gdkfont.c

Fails on line: switch(font->type),
where *font is: (type = -1, ascent = -1, descent = -1)

Stack trace:
gdk_string_width(font = 0x7caf01a4, string = "../"), line 308 in "gdkfont.c"
gtk_file_selection_populate(fs = 0x20094468, rel_path = "", try_complete = 0), line 1341 in "gtkfilesel.c"
gtk_file_selection_init(filesel = 0x20094468), line 513 in "gtkfilesel.c"
gtk_type_new(0xc315), line 403 in "gtktypeutils.c"
gtk_file_selection_new(title = "Ethereal: Open Capture File"), line 524 in "gtkfilesel.c"
file_open_cmd_cb(0x200640f4, 0x0), line 79 in "file_dlg.c"

Removing gtkclist.o from libui.a and recompiling removed this problem.

Any ideas?  I'm stumped.

-- 
Craig Rodrigues        
http://www.gis.net/~craigr    
rodrigc@xxxxxxxxxxxx