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y2038: Add support for 64-bit time on legacy ABIs

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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>
This commit is contained in:
Adhemerval Zanella
2021-02-17 13:35:19 -03:00
parent 8af344feb5
commit 47f24c21ee
118 changed files with 2387 additions and 61 deletions
Download Patch File Download Diff File Expand all files Collapse all files

138
time/time.h
View File

@@ -71,6 +71,7 @@ __BEGIN_DECLS
The result / CLOCKS_PER_SEC is program time in seconds. */
extern clock_t clock (void) __THROW;
#ifndef __USE_TIME_BITS64
/* Return the current time and put it in *TIMER if TIMER is not NULL. */
extern time_t time (time_t *__timer) __THROW;
@@ -80,7 +81,18 @@ extern double difftime (time_t __time1, time_t __time0)
/* Return the `time_t' representation of TP and normalize TP. */
extern time_t mktime (struct tm *__tp) __THROW;
#else
# ifdef __REDIRECT_NTH
extern time_t __REDIRECT_NTH (time, (time_t *__timer), __time64);
extern double __REDIRECT_NTH (difftime, (time_t __time1, time_t __time0),
__difftime64) __attribute__ ((__const__));
extern time_t __REDIRECT_NTH (mktime, (struct tm *__tp), __mktime64);
# else
# define time __time64
# define difftime __difftime64
# define mktime __mktime64
# endif
#endif
/* Format TP into S according to FORMAT.
Write no more than MAXSIZE characters and return the number
@@ -114,6 +126,7 @@ extern char *strptime_l (const char *__restrict __s,
#endif
#ifndef __USE_TIME_BITS64
/* Return the `struct tm' representation of *TIMER
in Universal Coordinated Time (aka Greenwich Mean Time). */
extern struct tm *gmtime (const time_t *__timer) __THROW;
@@ -122,7 +135,20 @@ extern struct tm *gmtime (const time_t *__timer) __THROW;
of *TIMER in the local timezone. */
extern struct tm *localtime (const time_t *__timer) __THROW;
#else
# ifdef __REDIRECT_NTH
extern struct tm*__REDIRECT_NTH (gmtime, (const time_t *__timer), __gmtime64);
extern struct tm *__REDIRECT_NTH (localtime, (const time_t *__timer),
__localtime64);
# else
# define gmtime __gmtime64
# define localtime __localtime64
# endif
#endif
#if defined __USE_POSIX || __GLIBC_USE (ISOC2X)
# ifndef __USE_TIME_BITS64
/* Return the `struct tm' representation of *TIMER in UTC,
using *TP to store the result. */
extern struct tm *gmtime_r (const time_t *__restrict __timer,
@@ -132,6 +158,20 @@ extern struct tm *gmtime_r (const time_t *__restrict __timer,
using *TP to store the result. */
extern struct tm *localtime_r (const time_t *__restrict __timer,
struct tm *__restrict __tp) __THROW;
# else
# ifdef __REDIRECT_NTH
extern struct tm*__REDIRECT_NTH (gmtime_r, (const time_t *__restrict __timer,
struct tm *__restrict __tp),
__gmtime64_r);
extern struct tm*__REDIRECT_NTH (localtime_r, (const time_t *__restrict __t,
struct tm *__restrict __tp),
__localtime64_r);
# else
# define gmtime_r __gmtime64_r
# define localtime_r __localtime_r
# endif
# endif
#endif /* POSIX || C2X */
/* Return a string of the form "Day Mon dd hh:mm:ss yyyy\n"
@@ -139,7 +179,15 @@ extern struct tm *localtime_r (const time_t *__restrict __timer,
extern char *asctime (const struct tm *__tp) __THROW;
/* Equivalent to `asctime (localtime (timer))'. */
#ifndef __USE_TIME_BITS64
extern char *ctime (const time_t *__timer) __THROW;
#else
# ifdef __REDIRECT_NTH
extern char *__REDIRECT_NTH (ctime, (const time_t *__timer), __ctime64);
# else
# define ctime __ctime64
# endif
#endif
#ifdef __USE_POSIX
/* Reentrant versions of the above functions. */
@@ -150,8 +198,18 @@ extern char *asctime_r (const struct tm *__restrict __tp,
char *__restrict __buf) __THROW;
/* Equivalent to `asctime_r (localtime_r (timer, *TMP*), buf)'. */
#ifndef __USE_TIME_BITS64
extern char *ctime_r (const time_t *__restrict __timer,
char *__restrict __buf) __THROW;
#else
# ifdef __REDIRECT_NTH
extern char *__REDIRECT_NTH (ctime_r, (const time_t *__restrict __timer,
char *__restrict __buf), __ctime64_r);
# else
# define ctime_r __ctime64_r
# endif
#endif
#endif /* POSIX */
@@ -186,11 +244,19 @@ extern long int timezone;
/* Miscellaneous functions many Unices inherited from the public domain
localtime package. These are included only for compatibility. */
#ifndef __USE_TIME_BITS64
/* Like `mktime', but for TP represents Universal Time, not local time. */
extern time_t timegm (struct tm *__tp) __THROW;
/* Another name for `mktime'. */
extern time_t timelocal (struct tm *__tp) __THROW;
#else
# ifdef __REDIRECT_NTH
extern time_t __REDIRECT_NTH (timegm, (struct tm *__tp), __timegm64);
extern time_t __REDIRECT_NTH (timelocal, (struct tm *__tp), __mktime64);
# else
# define timegm __timegm64
# endif
#endif
/* Return the number of days in YEAR. */
extern int dysize (int __year) __THROW __attribute__ ((__const__));
@@ -198,6 +264,7 @@ extern int dysize (int __year) __THROW __attribute__ ((__const__));
#ifdef __USE_POSIX199309
# ifndef __USE_TIME_BITS64
/* Pause execution for a number of nanoseconds.
This function is a cancellation point and therefore not marked with
@@ -205,7 +272,6 @@ extern int dysize (int __year) __THROW __attribute__ ((__const__));
extern int nanosleep (const struct timespec *__requested_time,
struct timespec *__remaining);
/* Get resolution of clock CLOCK_ID. */
extern int clock_getres (clockid_t __clock_id, struct timespec *__res) __THROW;
@@ -215,15 +281,46 @@ extern int clock_gettime (clockid_t __clock_id, struct timespec *__tp) __THROW;
/* Set clock CLOCK_ID to value TP. */
extern int clock_settime (clockid_t __clock_id, const struct timespec *__tp)
__THROW;
# else
# ifdef __REDIRECT
extern int __REDIRECT (nanosleep, (const struct timespec *__requested_time,
struct timespec *__remaining),
__nanosleep64);
extern int __REDIRECT_NTH (clock_getres, (clockid_t __clock_id,
struct timespec *__res),
__clock_getres64);
extern int __REDIRECT_NTH (clock_gettime, (clockid_t __clock_id, struct
timespec *__tp), __clock_gettime64);
extern int __REDIRECT_NTH (clock_settime, (clockid_t __clock_id, const struct
timespec *__tp), __clock_settime64);
# else
# define nanosleep __nanosleep64
# define clock_getres __clock_getres64
# define clock_gettime __clock_gettime64
# define clock_settime __clock_settime64
# endif
# endif
# ifdef __USE_XOPEN2K
/* High-resolution sleep with the specified clock.
This function is a cancellation point and therefore not marked with
__THROW. */
# ifndef __USE_TIME_BITS64
extern int clock_nanosleep (clockid_t __clock_id, int __flags,
const struct timespec *__req,
struct timespec *__rem);
# else
# ifdef __REDIRECT
extern int __REDIRECT (clock_nanosleep, (clockid_t __clock_id, int __flags,
const struct timespec *__req,
struct timespec *__rem),
__clock_nanosleep_time64);
# else
# define clock_nanosleep __clock_nanosleep_time64
# endif
# endif
/* Return clock ID for CPU-time clock. */
extern int clock_getcpuclockid (pid_t __pid, clockid_t *__clock_id) __THROW;
@@ -239,6 +336,7 @@ extern int timer_create (clockid_t __clock_id,
extern int timer_delete (timer_t __timerid) __THROW;
/* Set timer TIMERID to VALUE, returning old value in OVALUE. */
# ifndef __USE_TIME_BITS64
extern int timer_settime (timer_t __timerid, int __flags,
const struct itimerspec *__restrict __value,
struct itimerspec *__restrict __ovalue) __THROW;
@@ -246,6 +344,21 @@ extern int timer_settime (timer_t __timerid, int __flags,
/* Get current value of timer TIMERID and store it in VALUE. */
extern int timer_gettime (timer_t __timerid, struct itimerspec *__value)
__THROW;
# else
# ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (timer_settime, (timer_t __timerid, int __flags,
const struct itimerspec *__restrict __value,
struct itimerspec *__restrict __ovalue),
__timer_settime64);
extern int __REDIRECT_NTH (timer_gettime, (timer_t __timerid,
struct itimerspec *__value),
__timer_gettime64);
# else
# define timer_settime __timer_settime64
# define timer_gettime __timer_gettime64
# endif
# endif
/* Get expiration overrun for timer TIMERID. */
extern int timer_getoverrun (timer_t __timerid) __THROW;
@@ -253,16 +366,35 @@ extern int timer_getoverrun (timer_t __timerid) __THROW;
#ifdef __USE_ISOC11
# ifndef __USE_TIME_BITS64
/* Set TS to calendar time based in time base BASE. */
extern int timespec_get (struct timespec *__ts, int __base)
__THROW __nonnull ((1));
# else
# ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (timespec_get, (struct timespec *__ts, int __base),
__timespec_get64) __nonnull ((1));
# else
# define timespec_get __timespec_get64
# endif
# endif
#endif
#if __GLIBC_USE (ISOC2X)
# ifndef __USE_TIME_BITS64
/* Set TS to resolution of time base BASE. */
extern int timespec_getres (struct timespec *__ts, int __base)
__THROW;
# else
# ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (timespec_getres, (struct timespec *__ts,
int __base),
__timespec_getres64);
# else
# define timespec_getres __timespec_getres64
# endif
# endif
#endif