On 9/14/06, Bram Moolenaar <[EMAIL PROTECTED]> wrote:
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.
Breakpoint 1, find_tags (pat=0x827b570 "[EMAIL PROTECTED]",
num_matches=0xbff9238c, matchesp=0xbff92388,
flags=40, mincount=1, buf_ffname=0x0) at tag.c:1625
1625 eof = tag_fgets(lbuf, LSIZE, fp);
(gdb) p eof
$1 = 1
(gdb) n
1626 if (!eof && search_info.curr_offset != 0)
(gdb) n
1642 while (!eof && vim_isblankline(lbuf))
(gdb) n
1647 if (eof)
(gdb) n
1650 state = TS_SKIP_BACK;
(gdb) n
1651 search_info.match_offset = ftell(fp);
(gdb) n
1652 search_info.curr_offset =
search_info.curr_offset_used;
(gdb) n
1653 continue;
(gdb) n
1562 line_breakcheck(); /* check for CTRL-C typed */
(gdb) n
1564 if ((flags & TAG_INS_COMP)) /* Double brackets for gcc */
(gdb) n
1566 if (got_int || compl_interrupted)
(gdb) n
1576 if (mincount == TAG_MANY && match_count >= TAG_MANY)
(gdb) n
1582 if (get_it_again)
(gdb) n
1588 if (state == TS_BINARY)
(gdb) n
1601 else if (state == TS_SKIP_BACK)
(gdb) n
1603 search_info.curr_offset -= LSIZE * 2;
(gdb) n
1604 if (search_info.curr_offset < 0)
(gdb) n
1616 if (state == TS_BINARY || state == TS_SKIP_BACK)
(gdb) n
1619 search_info.curr_offset_used = search_info.curr_offset;
(gdb) n
1621 fseeko(fp, search_info.curr_offset, SEEK_SET);
(gdb) n
Breakpoint 1, find_tags (pat=0x827b570 "[EMAIL PROTECTED]",
num_matches=0xbff9238c, matchesp=0xbff92388,
flags=40, mincount=1, buf_ffname=0x0) at tag.c:1625
1625 eof = tag_fgets(lbuf, LSIZE, fp);
(gdb) n
1626 if (!eof && search_info.curr_offset != 0)
(gdb) n
1642 while (!eof && vim_isblankline(lbuf))
(gdb)
