* [Bug libstdc++/48340] Several wchar_t tests FAIL on IRIX 6.5
2011-03-29 17:32 [Bug libstdc++/48340] New: Several wchar_t tests FAIL on IRIX 6.5 ro at gcc dot gnu.org
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-03-29 17:38:58 UTC ---
(In reply to comment #0)
>
> (gdb) p str10
> $1 = {static npos = 4294967295, _M_dataplus = {<std::allocator<wchar_t>> =
> {<__gnu_cxx::new_allocator<wchar_t>> = {<No data fields>}, <No data fields>},
> _M_p = 0x1000e2f4
> L"\000\000\000s\000\000\000a\000\000\000i\000\000\000l\000\000\000i\000\000\000n\000\000\000g\000\000\000
extracting str10 doesn't seem to have stopped at the first whitespace
character, implying a problem with the wchar_t equivalent of iswspace
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-03-29 17:52:44 UTC ---
Here's a simpler test, which should return 1:
#include <locale>
int main()
{
return isspace(L' ', std::locale());
}
if that works, how about this, which should also return 1:
#include <locale>
#include <sstream>
#include <string>
int main()
{
std::wstring s(L" ");
std::wistringstream ss;
return isspace(s[0], ss.getloc());
}
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--- Comment #3 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> 2011-03-29 18:09:05 UTC ---
Both return 0. I wonder if the fact that char is unsigned on IRIX might
have something to do with this? OTOH, compiling them with -fsigned-char
doesn't change anything.
If I compile the tests with SGI CC instead, they do return 1.
Rainer
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From: redi at gcc dot gnu.org @ 2011-03-30 11:27 UTC (permalink / raw)
To: gcc-bugs
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2011.03.30 11:07:13
Ever Confirmed|0 |1
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-03-30 11:07:13 UTC ---
Are you using a specific configure value for --enable-clocale or just using the
default "generic" model?
What about this test, I assume the assertion fails:
#include <locale>
#include <assert.h>
int main()
{
struct ctype : std::ctype<wchar_t>
{
bool test()
{
return this->is(std::ctype_base::space, L' ');
}
} c;
assert( c.test() == iswctype(L' ', wctype("space")) );
}
What is the value of _ISspace in /usr/include/ctype.h ?
If it's greater than (1<<15) that would explain it
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--- Comment #5 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> 2011-03-30 11:16:55 UTC ---
> --- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-03-30 11:07:13 UTC ---
> Are you using a specific configure value for --enable-clocale or just using the
> default "generic" model?
I'm using the generic model: last time I tried ieee_1003.1-2001 (both on
Solaris and IRIX), it failed (PR libstdc++/41495) and I haven't yet
gotten around to do anything about this.
> What about this test, I assume the assertion fails:
Indeed.
> What is the value of _ISspace in /usr/include/ctype.h ?
#define _ISspace (_S | _BL)
#define _S 0x00000008 /* Spacing character */
#define _BL 0x80000000 /* The blank character class */
> If it's greater than (1<<15) that would explain it
There we have it.
Rainer
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-03-30 11:27:09 UTC ---
(In reply to comment #5)
> > --- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-03-30 11:07:13 UTC ---
> > Are you using a specific configure value for --enable-clocale or just using the
> > default "generic" model?
>
> I'm using the generic model: last time I tried ieee_1003.1-2001 (both on
> Solaris and IRIX), it failed (PR libstdc++/41495) and I haven't yet
> gotten around to do anything about this.
Yep.
> > What about this test, I assume the assertion fails:
>
> Indeed.
>
> > What is the value of _ISspace in /usr/include/ctype.h ?
>
> #define _ISspace (_S | _BL)
>
> #define _S 0x00000008 /* Spacing character */
> #define _BL 0x80000000 /* The blank character class */
>
> > If it's greater than (1<<15) that would explain it
>
> There we have it.
Badabing.
I'm planning to add isblank to std::locale (LWG 2019) which will need changes
to all the locale models so while I'm doing that I will overhaul the ieee
locale model (possibly adding a POSIX 2008 version as well, which would be
close to the gnu model) and I'll also address this, so we can handle values
over (1<<15). Currently that '15' maximum is hardcoded in a few places.
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-03-30 11:29:27 UTC ---
it will be *at least* two weeks before I have time to start that work
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--- Comment #9 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> 2011-03-30 15:06:50 UTC ---
> --- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-03-30 11:29:27 UTC ---
> it will be *at least* two weeks before I have time to start that work
Don't worry about that: this bug has existed for a long time and I only
now got around to having a closer look.
So absolutely no need to hurry.
Rainer
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--- Comment #8 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> 2011-03-30 15:06:04 UTC ---
> I'm planning to add isblank to std::locale (LWG 2019) which will need changes
> to all the locale models so while I'm doing that I will overhaul the ieee
> locale model (possibly adding a POSIX 2008 version as well, which would be
> close to the gnu model) and I'll also address this, so we can handle values
> over (1<<15). Currently that '15' maximum is hardcoded in a few places.
That's great news, thanks for doing this.
Rainer
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From: redi at gcc dot gnu.org @ 2011-04-03 17:58 UTC (permalink / raw)
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--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-04-03 17:58:14 UTC ---
Created attachment 23858
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23858
handle ctype::mask values that don't fit in 16bits
this should fix it, but changes the size of ctype<wchar_t> on Irix, which would
break the ABI
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--- Comment #11 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> 2011-04-06 08:55:22 UTC ---
> --- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-04-03 17:58:14 UTC ---
> Created attachment 23858
> --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23858
> handle ctype::mask values that don't fit in 16bits
>
> this should fix it, but changes the size of ctype<wchar_t> on Irix, which would
> break the ABI
Unfortunately, it didn't work. At first, I applied the patch to my
previous build tree and reran make and make check in libstdc++, but the
failures persisted. To make sure there wasn't any missing dependency, I
removed the libstdc++-v3 directory, reconfigure and rebuilt, but with
the same results.
I happened to build on Tru64 UNIX from the same sources, and see lots of
wchar_t failures there, too.
Rainer
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |redi at gcc dot gnu.org
--- Comment #12 from Rainer Orth <ro at gcc dot gnu.org> 2012-01-11 16:17:45 UTC ---
Jonathan, do you see a way of getting this fixed for 4.7?
Thanks.
Rainer
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--- Comment #13 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-01-11 16:27:58 UTC ---
I have some ideas for PR 51772 which would also be relevant to this bug, and
wouldn't affect other platforms.
I'll see what I can do over the next few days
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--- Comment #14 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> 2012-01-11 16:30:03 UTC ---
Great, thanks.
Rainer
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |WONTFIX
--- Comment #15 from Rainer Orth <ro at gcc dot gnu.org> ---
4.7 branch closed.
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