It was raised on libc-help [1] that some Linux kernel interfaces expect
the libc to define __USE_TIME_BITS64 to indicate the time_t size for the
kABI. Different than defined by the initial y2038 design document [2],
the __USE_TIME_BITS64 is only defined for ABIs that support more than
one time_t size (by defining the _TIME_BITS for each module).
The 64 bit time_t redirects are now enabled using a different internal
define (__USE_TIME64_REDIRECTS). There is no expected change in semantic
or code generation.
Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu, and
arm-linux-gnueabi
[1] https://sourceware.org/pipermail/libc-help/2024-January/006557.html
[2] https://sourceware.org/glibc/wiki/Y2038ProofnessDesign
Reviewed-by: DJ Delorie <dj@redhat.com>
I used these shell commands:
../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")
and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 7061 files FOO.
I then removed trailing white space from math/tgmath.h,
support/tst-support-open-dev-null-range.c, and
sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following
obscure pre-commit check failure diagnostics from Savannah. I don't
know why I run into these diagnostics whereas others evidently do not.
remote: *** 912-#endif
remote: *** 913:
remote: *** 914-
remote: *** error: lines with trailing whitespace found
...
remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
A new build flag, _TIME_BITS, enables the usage of the newer 64-bit
time symbols for legacy ABI (where 32-bit time_t is default). The 64
bit time support is only enabled if LFS (_FILE_OFFSET_BITS=64) is
also used.
Different than LFS support, the y2038 symbols are added only for the
required ABIs (armhf, csky, hppa, i386, m68k, microblaze, mips32,
mips64-n32, nios2, powerpc32, sparc32, s390-32, and sh). The ABIs with
64-bit time support are unchanged, both for symbol and types
redirection.
On Linux the full 64-bit time support requires a minimum of kernel
version v5.1. Otherwise, the 32-bit fallbacks are used and might
results in error with overflow return code (EOVERFLOW).
The i686-gnu does not yet support 64-bit time.
This patch exports following rediretions to support 64-bit time:
* libc:
adjtime
adjtimex
clock_adjtime
clock_getres
clock_gettime
clock_nanosleep
clock_settime
cnd_timedwait
ctime
ctime_r
difftime
fstat
fstatat
futimens
futimes
futimesat
getitimer
getrusage
gettimeofday
gmtime
gmtime_r
localtime
localtime_r
lstat_time
lutimes
mktime
msgctl
mtx_timedlock
nanosleep
nanosleep
ntp_gettime
ntp_gettimex
ppoll
pselec
pselect
pthread_clockjoin_np
pthread_cond_clockwait
pthread_cond_timedwait
pthread_mutex_clocklock
pthread_mutex_timedlock
pthread_rwlock_clockrdlock
pthread_rwlock_clockwrlock
pthread_rwlock_timedrdlock
pthread_rwlock_timedwrlock
pthread_timedjoin_np
recvmmsg
sched_rr_get_interval
select
sem_clockwait
semctl
semtimedop
sem_timedwait
setitimer
settimeofday
shmctl
sigtimedwait
stat
thrd_sleep
time
timegm
timerfd_gettime
timerfd_settime
timespec_get
utime
utimensat
utimes
utimes
wait3
wait4
* librt:
aio_suspend
mq_timedreceive
mq_timedsend
timer_gettime
timer_settime
* libanl:
gai_suspend
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
I used these shell commands:
../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")
and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 6694 files FOO.
I then removed trailing white space from benchtests/bench-pthread-locks.c
and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this
diagnostic from Savannah:
remote: *** pre-commit check failed ...
remote: *** error: lines with trailing whitespace found
remote: error: hook declined to update refs/heads/master
bits/sched.h has logic to expose only an impl-namespace variant of
struct sched_param (i.e. struct __sched_param), but nothing uses it,
and the only header that includes bits/sched.h is sched.h. The
__need_schedparam logic can therefore be removed.
bits/sched.h also has a great deal of code relating to cpu_set_t
objects that was *almost* the same between the two versions of
bits/sched.h in the tree; a little spelunking indicated that this is
because some bug fixes got applied to the Linux-specific bits/sched.h
but not the generic one. Introduce a new header, bits/cpu-set.h,
containing the version of that code with the bugfixes, have sched.h
include it directly, and delete all of the code from both versions of
bits/sched.h.
Also remove the unnecessary name mangling in the definition of struct
sched_param -- POSIX specifies a field 'sched_priority', so there is
no reason to define it as '__sched_priority' and then paper over that
with a macro. (Just in case someone was using the internal name,
'sched_priority' remains a macro defined to expand to itself, and
'__sched_priority' now expands to 'sched_priority'.)
Finally, as long as I'm touching these files anyway, merge new
constants from linux/sched.h into the Linux bits/sched.h.
* bits/sched.h: Remove __need_schedparam logic and replace with a
normal multiple-include guard. Change field name in struct
sched_param from __sched_priority to sched_priority. Delete
everything under #ifndef __cpu_set_t_defined.
* sysdeps/unix/sysv/linux/bits/sched.h: Likewise. Also sync with
kernel sched.h, adding SCHED_ISO and SCHED_DEADLINE constants.
* posix/sched.h: Include bits/cpu-set.h as well as bits/sched.h.
For compatibility, #define sched_priority to itself, and #define
__sched_priority as sched_priority.
* posix/bits/cpu-set.h: New file containing, verbatim, the code
that was under #ifndef __cpu_set_t_defined in
sysdeps/unix/sysv/linux/bits/sched.h.
* include/bits/cpu-set.h: New wrapper.
* posix/Makefile: Install bits/cpu-set.h.
Many headers are expected to expose a subset of the type definitions
in time.h. time.h has a whole bunch of messy logic for conditionally
defining some its types and structs, but, as best I can tell, this
has never worked 100%. In particular, __need_timespec is ineffective
if _TIME_H has already been defined, which means that if you compile
#include <time.h>
#include <sched.h>
with e.g. -fsyntax-only -std=c89 -Wall -Wsystem-headers, you will get
In file included from test.c:2:0:
/usr/include/sched.h:74:57: warning: "struct timespec" declared inside
parameter list will not be visible outside of this definition or declaration
extern int sched_rr_get_interval (__pid_t __pid, struct timespec *__t) __THROW;
^~~~~~~~
And if you want to _use_ sched_rr_get_interval in a TU compiled that
way, you're hosed.
This patch replaces all of that with small bits/types/TYPE.h headers
as introduced earlier. time.h and bits/time.h are now *much* simpler,
and a lot of other headers are slightly simpler.
* time/time.h, bits/time.h, sysdeps/unix/sysv/linux/bits/time.h:
Remove all logic conditional on __need macros. Move all the
conditionally defined types to their own headers...
* time/bits/types/clock_t.h: Define clock_t here.
* time/bits/types/clockid_t.h: Define clockid_t here.
* time/bits/types/struct_itimerspec.h: Define struct itimerspec here.
* time/bits/types/struct_timespec.h: Define struct timespec here.
* time/bits/types/struct_timeval.h: Define struct timeval here.
* time/bits/types/struct_tm.h: Define struct tm here.
* time/bits/types/time_t.h: Define time_t here.
* time/bits/types/timer_t.h: Define timer_t here.
* time/Makefile: Install the new headers.
* bits/resource.h, io/fcntl.h, io/sys/poll.h, io/sys/stat.h
* io/utime.h, misc/sys/select.h, posix/sched.h, posix/sys/times.h
* posix/sys/types.h, resolv/netdb.h, rt/aio.h, rt/mqueue.h
* signal/signal.h, pthread/semaphore.h, sysdeps/nptl/pthread.h
* sysdeps/unix/sysv/linux/alpha/bits/resource.h
* sysdeps/unix/sysv/linux/alpha/sys/acct.h
* sysdeps/unix/sysv/linux/bits/resource.h
* sysdeps/unix/sysv/linux/bits/timex.h
* sysdeps/unix/sysv/linux/mips/bits/resource.h
* sysdeps/unix/sysv/linux/net/ppp_defs.h
* sysdeps/unix/sysv/linux/sparc/bits/resource.h
* sysdeps/unix/sysv/linux/sys/acct.h
* sysdeps/unix/sysv/linux/sys/timerfd.h
* sysvipc/sys/msg.h, sysvipc/sys/sem.h, sysvipc/sys/shm.h
* time/sys/time.h, time/sys/timeb.h
Use the new bits/types headers.
* include/time.h: Remove __need logic.
* include/bits/time.h
* include/bits/types/clock_t.h, include/bits/types/clockid_t.h
* include/bits/types/time_t.h, include/bits/types/timer_t.h
* include/bits/types/struct_itimerspec.h
* include/bits/types/struct_timespec.h
* include/bits/types/struct_timeval.h
* include/bits/types/struct_tm.h:
New wrapper headers.
This patch fixes one of the header namespace issues shown up by
conformtest, <sched.h> failing to expose all symbols from <time.h> as
required by older standards. The patch keeps the existing behavior if
__USE_XOPEN2K is defined (the default; POSIX.1-2001 was the version
that made it optional to expose these symbols), but ensures that all
the symbols from <time.h> are exposed if an older standard is
selected. Tested x86_64.
[BZ #16670]
* posix/sched.h [!__USE_XOPEN2K] (__need_time_t): Don't define
before #include of <time.h>.
[!__USE_XOPEN2K] (__need_timespec): Likewise.
* conform/Makefile (test-xfail-POSIX/sched.h/conform): Remove.
(test-xfail-UNIX98/sched.h/conform): Likewise.
* signal/signal.h <__USE_BSD || __USE_XOPEN_EXTENDED>: Define
__need_size_t and include stddef.h.
* sysvipc/sys/msg.h: Likewise.
* posix/sched.h: Likewise.
* hurd/hurd/signal.h (__need_size_t): Define.
* CONFORMANCE: ctype.h and wctype.h no longer define size_t,
neither does signal.h in pedantic ISO C namespaces. stdio.h
no longer defines wint_t or wchar_t.
2002-11-24 Robert Love <rml@tech9.net>
* posix/sched.h: Second parameter of sched_setaffinity and
sched_getaffinity is `unsigned int', not `unsigned long'.
* sysdeps/generic/sched_setaffinity.c: Likewise.
* sysdeps/generic/sched_getaffinity.c: Likewise.
Reported by John Levon <levon@movementarian.org>.
2002-05-24 Robert Love <rml@tech9.net>
* posix/Makefile (routines): Add sched_getaffinity and
sched_setaffinity.
* posix/sched.h: Add declarations for sched_getaffinity and
sched_setaffinity.
* sysdeps/generic/sched_getaffinity.c: New file.
* sysdeps/generic/sched_setaffinity.c: New file.
* sysdeps/unix/sysv/linux/syscalls.list: Add sched_getaffinity and
sched_setaffinity.
2002-08-06 Andreas Schwab <schwab@suse.de>
* sysdeps/unix/utime.c: If TIMES is NULL pass it through to utimes.
2001-07-06 Paul Eggert <eggert@twinsun.com>
* manual/argp.texi: Remove ignored LGPL copyright notice; it's
not appropriate for documentation anyway.
* manual/libc-texinfo.sh: "Library General Public License" ->
"Lesser General Public License".
2001-07-06 Andreas Jaeger <aj@suse.de>
* All files under GPL/LGPL version 2: Place under LGPL version
2.1.
1997-12-28 15:08 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/powerpc/__longjmp.S: Define _SETJMP_H before including
<bits/setjmp.h>.
* sysdeps/powerpc/setjmp.S: Likewise.
Patches by Matt McLean <keys@keys.got.net>.
* Make-dist (sysdep_dirs): Ignore bits dirs while searching.
* Makefile: Undo last patch.
(distribute): Add test-installation.pl.
* configure.in: Correct handling of --enable-add-ons without parameter.
Correct address of WWW pages.
* libc.map: Add _nl_domain_bindings.
* db2/mutex/tsl_parisc.s: New file.
* iconvdata/Makefile (distribute): Add jis0201.c, jis0208.c, jis0212.c,
and extra-module.mk.
* localedata/Makefile (distribute): New. Add all the files.
* stdlib/Makefile (headers): Add inttypes.h.
(routines): Add strtoimax, strtoumax, wcstoimax, and wcstoumax.
* sysdeps/generic/inttypes.h: New file.
* sysdeps/generic/strtoimax.c: New file.
* sysdeps/generic/strtoumax.c: New file.
* sysdeps/generic/wcstoimax.c: New file.
* sysdeps/generic/wcstoumax.c: New file.
* sysdeps/wordsize-32/Dist: Removed.
* sysdeps/wordsize-32/Makefile: Removed.
* sysdeps/wordsize-64/Dist: Removed.
* sysdeps/wordsize-64/Makefile: Removed.
* sysdeps/generic/bits/environments.h: New file.
* include/limits.h: Define MB_LEN_MAX in any case to 6. The gcc
header is still not correct.
* io/fcntl.h [__USE_FILE_OFFSET64]: We have to use the __*64 types.
* posix/unistd.h: Likewise.
* sysdeps/generic/sys/mman.h: Likewise.
* sysdeps/unix/sysv/linux/sys/mman.h: Likewise.
* manual/arith.texi: Change definition of mul macro.
* manual/math.texi: Likewise.
* misc/Makefile (routines): Add mmap64.
* sysdeps/generic/mmap64.c: New file.
* sysdeps/unix/sysv/linux/alpha/mmap64.c: New file.
* sysdeps/unix/sysv/linux/sparc/sparc64/mmap64.c: New file.
* sysdeps/unix/sysv/linux/alpha/syscalls.list: Add __mmap64 and mmap64
aliases to mmap.
* sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list: Likewise.
* sysdeps/generic/setrlimit64.c: Don't mark as stub.
* nis/nss_nis/nis-hosts.c (internal_nis_gethostent_r): Pretty print.
* nis(rpcsvc/nis_tags.h: Prevent warning by unknown pragma.
* sysdeps/posix/mk-stdiolim.c: Generate correct file which defines
FOPEN_MAX also when included by limits.h.
* sysdeps/unix/sysv/linux/stdio_lim.h.in: Likewise.
* sysdeps/unix/sysv/linux/Dist: Add oldsiglist.c, netax25/ax25.h,
and netrom/netrom.h.
* sysdeps/unix/sysv/linux/Makefile [$(subdir)=stdio-common]: Add
oldsiglist to sysdep_routines, not aux.
[$(subdir)=inet] (sysdep_headers): Add netax25/ax25.h, netrom/netrom.h.
* sysdeps/unix/sysv/linux/bits/socket.h: Remove SOL_AX25, SOL_ATALK,
and SOL_NETROM definition.
* sysdeps/unix/sysv/linux/i386/Dist: Add s_pwrite64.S and s_pread64.S.
* sysdeps/unix/sysv/linux/net/route.h: Pretty print.
* sysdeps/unix/sysv/linux/netatalk/at.h: Pretty print.
1997-12-25 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/unix/sysv/linux/alpha/net/route.h: New file.
* sysdeps/unix/sysv/linux/alpha/kernel_sigaction.h: Replace
sa_handler with k_sa_handler.
* sysdeps/unix/sysv/linux/alpha/syscalls.list: Add __getrlimit as
strong alias.
Reported by a sun.
* sysdeps/unix/sysv/linux/sigsuspend.c: Don't define
__libc_have_rt_sigs here.
* sysdeps/unix/sysv/linux/sigaction.c: Do it instead here.
* sysdeps/unix/sysv/linux/i386/sigaction.c: Likewise.
* sysdeps/unix/sysv/linux/sigpending.c: Correct comment.
* sysdeps/unix/sysv/linux/sigprocmask.c: Likewise.
1997-12-11 07:51 Geoff Keating <geoffk@ozemail.com.au>
* sysdeps/powerpc/atomicity.h: New file.
* sysdeps/mach/powerpc/machine-lock.h: New file.
* Rules: Use -fpic to build anything that might end up in a users'
shared library.
* sysdeps/powerpc/s_fdim.c: New file.
* sysdeps/powerpc/s_fdimf.c: New file.
* sysdeps/powerpc/s_fmax.S: New file.
* sysdeps/powerpc/s_fmaxf.S: New file.
* sysdeps/powerpc/s_fmin.S: New file.
* sysdeps/powerpc/s_fminf.S: New file.
* sysdeps/powerpc/s_llrint.c: Now is for double.
* sysdeps/powerpc/s_llrintf.c: New file.
* sysdeps/powerpc/s_llround.c: Now is for double.
* sysdeps/powerpc/s_llroundf.c: New file.
* sysdeps/powerpc/s_lrint.c: Now is for double.
* sysdeps/powerpc/s_lrintf.S: New file.
* sysdeps/powerpc/s_lround.c: Now is for double.
* sysdeps/powerpc/s_lroundf.c: New file.
* sysdeps/powerpc/bits/mathinlines.h: Add inline versions of lrint,
lrintf, fdim, fdimf.
* sysdeps/unix/sysv/linux/powerpc/kernel_termios.h: Don't use bits/
file directly, use its parent.
* sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c: Re-instate '++'
(for the third time).
1997-12-20 13:50 Richard Henderson <rth@cygnus.com>
* posix/sched.h: timespec is in <time.h>.
* sysdeps/unix/sysv/linux/sys/kd.h: Don't redefine _LINUX_TYPES_H.
Fri Sep 13 04:33:08 1996 Ulrich Drepper <drepper@cygnus.com>
* sched.h: New file. helper to access posix/sched.h.
* posix/sched.h: Change `sched_params' to `sched_param' to follow
POSIX.4.
Thu Sep 12 20:12:40 1996 Ulrich Drepper <drepper@cygnus.com>
* db/makedb.c (usage): Print bug report address separately to
ease translators task.
* catgets/gencat.c (usage): Likewise.
* locale/locale.c (usage): Likewise.
* locale/localedef.c (usage): Likewise.
1996-09-12 Paul Eggert <eggert@twinsun.com>
* time/strftime.c (my_localtime_r): Define if ! HAVE_LOCALTIME_R,
and #define localtime_r to it. If _LIBC, use __localtime_r instead.
(my_gmtime_r): Similar, except it's not needed if ! HAVE_TM_GMTOFF.
Thu Sep 12 14:03:29 1996 Ulrich Drepper <drepper@cygnus.com>
* crypt/Makefile: Include Makeconfig and add crypt object dir to
rpath-link so that running the check finds the new library.
* crypt/cert.c: provide correct prototypes to prevent warnings.
Reported by Andreas Jaeger.
* sysdeps/mach/hurd/Makefile (rpath-link): Don't use += because
old and new value must be glued using `:'.
Reported by Marcus Daniels.
* hurd/hurd-raise.c (_hurd_raise_signal): Pass sigcode in msg_sig_post
rpc.
* hurd/hurdmsg.c (_S_msg_set_environment): Use argz.h functions
instead of _hurd_split_args.
(_S_msg_*_exec_flags): Functions removed.
(_S_msg_startup_dosync): Stub removed.
Sat May 4 02:11:55 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
* sysdeps/mach/hurd/ptrace.c: Set _hurdsig_traced instead of
EXEC_TRACED bit in _hurd_exec_flags.
Pass sigcode arg in msg_sig_post_untraced rpc.
* sysdeps/mach/hurd/access.c: Don't pass io port in
auth_user_authenticate rpc.
* posix/sched.h: Fix typos.
* sysdeps/mach/hurd/fork.c: Use new critical section lock.
Clear _hurdsig_traced instead of EXEC_TRACED.
* sysdeps/stub/nanosleep.c (nanosleep): Fix typo.
* wcsmbs/wcstol.c: Find strtol.c in ../stdlib.
* wcsmbs/wcstof.c: Find strtod.c in ../stdlib.
* wcsmbs/wcstod.c: Likewise.
* wcsmbs/wcstold.c: Likewise.
* wcsmbs/wcwidth.h: Find cname-lookup.h in ../wctype.
* string/envz.c (envz_entry): Use const.
(envz_get, envz_remove): Likewise.
(envz_entry): Return char *, not const char *.
* string/envz.h: Fix decl.
* string/argz-create.c: Use const in prototype.
* string/argz-next.c: Likewise.
* sysdeps/mach/hurd/sigprocmask.c: Pass sigcode arg to msg_sig_post.
* sysdeps/mach/hurd/i386/sigreturn.c: Likewise.
* sysdeps/mach/hurd/sigsuspend.c: Likewise.
* sysdeps/mach/hurd/kill.c: Likewise.
* hurd/hurdexec.c (_hurd_exec): Use new critical section lock.
* hurd/catch-exc.c (_S_catch_exception_raise): Likewise.
* hurd/sigunwind.c (_hurdsig_longjmp_from_handler): Likewise.
* hurd/thread-cancel.c (hurd_thread_cancel, hurd_check_cancel):
Likewise.
* sysdeps/mach/hurd/jmp-unwind.c (_longjmp_unwind): Likewise.
* sysdeps/mach/hurd/sigaction.c: Likewise.
* sysdeps/mach/hurd/errnos.awk: Don't use ARGV in comment; it can
change meaninglessly.
* hurd/hurd/signal.h (struct hurd_sigstate): Replace critical section
flag with a spin lock.
(_hurd_critical_section_lock): Use spin_try_lock on that to see if we
get it. No need to take SS->lock at all.
(_hurd_critical_section_unlock): Unlock SS->critical_section_lock
instead of clearing the old flag member.
* hurd/hurdsig.c (_hurd_internal_post_signal): Use spin_lock_locked to
test the critical section state.
* hurd/hurdinit.c (_hurd_init): Set _hurdsig_traced from the intarray.
* hurd/hurdkill.c (_hurd_sig_post): Pass 0 sigcode in msg_sig_post.
* hurd/hurdsig.c (_hurd_internal_post_signal): Test _hurdsig_traced
instead of testing (_hurd_exec_flags & EXEC_TRACED).
(_S_msg_sig_post): Take sigcode arg and pass it through.
(_S_msg_sig_post_untraced): Likewise.
(reauth_proc): Don't pass proc port in auth_user_authenticate.
* hurd/setauth.c (_hurd_setauth): Don't pass object ports in
auth_user_authenticate RPCs, just the one-off rendezvous port.
* hurd/dtable.c (reauth_dtable): Likewise.
* hurd/hurdlookup.c (__hurd_file_name_lookup_retry): Likewise.
* hurd/hurdexec.c (_hurd_exec): Pass 0 flags to file_exec.
Pass sigcode arg to msg_sig_post.
* string/argz.h (argz_create): Use const in prototype.
* hurd/hurdinit.c (_hurd_proc_init): Test _hurdsig_traced instead of
testing (_hurd_exec_flags & EXEC_TRACED).
Pass sigcode arg to msg_sig_post.
* hurd/hurd.h: Declare _hurdsig_traced.
* string/argz.h (__argz_next): Cast ENTRY before returning it.
* hurd/hurd/signal.h (_hurd_critical_section_unlock): Pass sigcode arg
to msg_sig_post.
* hurd/path-lookup.c: New file.
* hurd/Makefile (routines): Add path-lookup.
* hurd/hurd/lookup.h: Declare file_name_path_scan,
hurd_file_name_path_lookup.
* hurd/hurd.h: Declare file_name_path_lookup.
* sysdeps/mach/hurd/select.c: The io_select rpc no longer has a TAG_ID
argument. Instead, use a separate reply port for each RPC and put them
all in a port set to wait for slow replies.
