Yakov Lerner wrote:
> > > > > > On 9/14/06, Haakon Riiser <[EMAIL PROTECTED]> wrote:
> > > > > > > After recompiling Vim with -D_FILE_OFFSET_BITS=64, everything
> > > > > > > involving tags break, including the help system. Typing :h,
> > > > > > > or pressing ^] to jump to a tag, causes Vim to get caught in an
> > > > > > > infinite loop.
> > >
> > > [...]
> > >
> > > > > Can you find out where in the code this happens?
> > > > >
> > > > > I suspect the 64 bit library functions work different from the
> > > > > "normal" functions. Perhaps fgets(), since that's what is
> > > > > being used to read the tags file.
> > > >
> > > > In situation where fgets() returns NULL, find_tags() enters
> > > > infinite loop as follows.
> > >
> > > Sorry, this doesn't show me where the loop actually is. Please compile
> > > without the optimizer, otherwise code reordering confuses the debugger.
> > >
> > > At least tell us if Vim hangs in tag_fgets() or in find_tags().
> >
> > The loop is is inside find_tags(), and it procees around following line
> > numbers:
> > 1625 1626 1642 1647 1650 1651 1652 1653 1562 1564 1566
> > 1576 1582 1588 1601 1603 1604 1616 1619 1621 1625
> > and infinite loop repeats. Look at this:
> > gdb> print print search_info.curr_offset
> > $2 = 5258708303049
> >
> > The difference must be related to fseek(). I don't see where
> > search_info.curr_offset is first initialized, though.
The problem must be that either ftello() doesn't return the right
position or fseeko() doesn't position the read pointer properly. I
can't think of another reason.
> And additionally:
> (gdb) print search_info
> $3 = {low_offset = 0, high_offset = 10526964844947, curr_offset =
> 5258708303049,
> curr_offset_used = 5258708303049, match_offset = 10763188046282,
> low_char = 0, high_char = 120}
This suggests that an unsigned number overflows and is turned into an
int somewhere. I can't guess where and I can't reproduce this. Perhaps
someone can think of a workaround and try it out.
One thing you can do: check that off_t is signed. You should have seen
compiler warnings then.
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