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* linux: Only use 64-bit syscall if required for clock_nanosleepAdhemerval Zanella2021-06-222-15/+34
| | | | | | | | | | | For !__ASSUME_TIME64_SYSCALLS there is no need to issue a 64-bit syscall if the provided timeout fits in a 32-bit one. The 64-bit usage should be rare since the timeout is a relative one. Checked on i686-linux-gnu on a 4.15 kernel and on a 5.11 kernel (with and without --enable-kernel=5.1) and on x86_64-linux-gnu. Reviewed-by: Lukasz Majewski <lukma@denx.de>
* Use 64 bit time_t stat internallyAdhemerval Zanella2021-06-221-3/+3
| | | | | | | | | | For the legacy ABI with supports 32-bit time_t it calls the 64-bit time directly, since the LFS symbols calls the 64-bit time_t ones internally. Checked on i686-linux-gnu and x86_64-linux-gnu. Reviewed-by: Lukasz Majewski <lukma@denx.de>
* y2038: Add test coverageAdhemerval Zanella2021-06-1519-0/+60
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is enabled through a new rule, tests-y2038, which is built only when the ABI supports the comapt 64-bit time_t (defined by the header time64-compat.h, which also enables the creation of the symbol Version for Linux). It means the tests are not built for ABI which already provide default 64-bit time_t. The new rule already adds the required LFS and 64-bit time_t compiler flags. The current coverage is: * libc: - adjtime tst-adjtime-time64 - adjtimex tst-adjtimex-time64 - clock_adjtime tst-clock_adjtime-time64 - clock_getres tst-clock-time64, tst-cpuclock1-time64 - clock_gettime tst-clock-time64, tst-clock2-time64, tst-cpuclock1-time64 - clock_nanosleep tst-clock_nanosleep-time64, tst-cpuclock1-time64 - clock_settime tst-clock2-time64 - cnd_timedwait tst-cnd-timedwait-time64 - ctime tst-ctime-time64 - ctime_r tst-ctime-time64 - difftime tst-difftime-time64 - fstat tst-stat-time64 - fstatat tst-stat-time64 - futimens tst-futimens-time64 - futimes tst-futimes-time64 - futimesat tst-futimesat-time64 - fts_* tst-fts-time64 - getitimer tst-itimer-timer64 - getrusage - gettimeofday tst-clock_nanosleep-time64 - glob / globfree tst-gnuglob64-time64 - gmtime tst-gmtime-time64 - gmtime_r tst-gmtime-time64 - lstat tst-stat-time64 - localtime tst-y2039-time64 - localtime_t tst-y2039-time64 - lutimes tst-lutimes-time64 - mktime tst-mktime4-time64 - mq_timedreceive tst-mqueue{1248}-time64 - mq_timedsend tst-mqueue{1248}-time64 - msgctl test-sysvmsg-time64 - mtx_timedlock tst-mtx-timedlock-time64 - nanosleep tst-cpuclock{12}-time64, tst-mqueue8-time64, tst-clock-time64 - nftw / ftw ftwtest-time64 - ntp_adjtime tst-ntp_adjtime-time64 - ntp_gettime tst-ntp_gettime-time64 - ntp_gettimex tst-ntp_gettimex-time64 - ppoll tst-ppoll-time64 - pselect tst-pselect-time64 - pthread_clockjoin_np tst-join14-time64 - pthread_cond_clockwait tst-cond11-time64 - pthread_cond_timedwait tst-abstime-time64 - pthread_mutex_clocklock tst-abstime-time64 - pthread_mutex_timedlock tst-abstime-time64 - pthread_rwlock_clockrdlock tst-abstime-time64, tst-rwlock14-time64 - pthread_rwlock_clockwrlock tst-abstime-time64, tst-rwlock14-time64 - pthread_rwlock_timedrdlock tst-abstime-time64, tst-rwlock14-time64 - pthread_rwlock_timedwrlock tst-abstime-time64, tst-rwlock14-time64 - pthread_timedjoin_np tst-join14-time64 - recvmmsg tst-cancel4_2-time64 - sched_rr_get_interval tst-sched_rr_get_interval-time64 - select tst-select-time64 - sem_clockwait tst-sem5-time64 - sem_timedwait tst-sem5-time64 - semctl test-sysvsem-time64 - semtimedop test-sysvsem-time64 - setitimer tst-mqueue2-time64, tst-itimer-timer64 - settimeofday tst-settimeofday-time64 - shmctl test-sysvshm-time64 - sigtimedwait tst-sigtimedwait-time64 - stat tst-stat-time64 - thrd_sleep tst-thrd-sleep-time64 - time tst-mqueue{1248}-time64 - timegm tst-timegm-time64 - timer_gettime tst-timer4-time64 - timer_settime tst-timer4-time64 - timerfd_gettime tst-timerfd-time64 - timerfd_settime tst-timerfd-time64 - timespec_get tst-timespec_get-time64 - timespec_getres tst-timespec_getres-time64 - utime tst-utime-time64 - utimensat tst-utimensat-time64 - utimes tst-utimes-time64 - wait3 tst-wait3-time64 - wait4 tst-wait4-time64 * librt: - aio_suspend tst-aio6-time64 - mq_timedreceive tst-mqueue{1248}-time64 - mq_timedsend tst-mqueue{1248}-time64 - timer_gettime tst-timer4-time64 - timer_settime tst-timer4-time64 * 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>
* y2038: Add support for 64-bit time on legacy ABIsAdhemerval Zanella2021-06-152-3/+206
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* time: Add 64-bit time support for getdateAdhemerval Zanella2021-06-152-22/+14
| | | | | | | | | | | | The getdate is basically a wrapper localtime and mktime. The 64-bit time support is done calling the 64-bit internal functions, there is no need to add a new symbol version. Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* y2038: Add __USE_TIME_BITS64 support for struct timespecAdhemerval Zanella2021-06-151-1/+6
| | | | | | | | The __USE_TIME_BITS64 is not defined internally yet. Reviewed-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* y2038: Add __USE_TIME_BITS64 support for struct timevalAdhemerval Zanella2021-06-151-0/+5
| | | | | | | | The __USE_TIME_BITS64 is not defined internally yet. Reviewed-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* y2038: Add __USE_TIME_BITS64 support for time_tAdhemerval Zanella2021-06-151-0/+4
| | | | | | | | The __USE_TIME_BITS64 is not defined internally yet. Reviewed-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
* Do not declare asctime_r and ctime_r for C2XJoseph Myers2021-05-181-2/+2
| | | | | | | | | | | | | | | | | ISO C2X added the asctime_r, ctime_r, gmtime_r and localtime_r functions from POSIX. It's now removed asctime_r and ctime_r again, reflecting that they are marked obsolescent in POSIX; update glibc's time.h accordingly. The same change that removed those two functions from C2X also marked asctime and ctime as deprecated (reflecting how POSIX shows them as obsolescent), i.e. using the [[deprecated]] attribute in the prototypes shown in C2X. It's less clear if we should explicitly deprecate those functions like that in the glibc headers; this patch does nothing regarding such a deprecation (there's no normative requirement from C2X showing the functions as deprecated). Tested for x86_64 and x86.
* Add C2X timespec_getresJoseph Myers2021-05-176-2/+96
| | | | | | | | | | | | | | | | | | | ISO C2X adds a timespec_getres function alongside the C11 timespec_get, with functionality similar to that of POSIX clock_getres (including allowing a NULL pointer to be passed to the function). Implement this function for glibc, similarly to the implementation of timespec_get. This includes a basic test like that of timespec_get, but no documentation in the manual, given that TIME_UTC and timespec_get aren't documented in the manual at all. The handling of 64-bit time follows that in timespec_get; people maintaining patch series for 64-bit time will need to update them accordingly (to export __timespec_getres64, redirect calls in time.h and run the test for _TIME_BITS=64). Tested for x86_64 and x86, and (previous version; only testcase differs) with build-many-glibcs.py.
* time: Add 64 bit tests for getdate / getdate_rAdhemerval Zanella2021-04-151-61/+92
| | | | | | | | The test is also converted to use libsupport. Checked on i686-linux-gnu and x86_64-linux-gnu. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* time: Add basic timespec_get testsAdhemerval Zanella2021-04-152-1/+42
| | | | | | Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* time: Add timegm/timelocal basic testsAdhemerval Zanella2021-04-152-1/+96
| | | | | | Checked i686-linux-gnu and x86_64-linux-gnu. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* time: Add gmtime/gmtime_r testsAdhemerval Zanella2021-04-152-1/+125
| | | | | | Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* time: Add getitimer and setitimer basic testsAdhemerval Zanella2021-04-152-1/+176
| | | | | | Checked on i686-linux-gnu and x86_64-linux-gnu. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
* Support for multiple versions in versioned_symbol, compat_symbolFlorian Weimer2021-03-255-10/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This essentially folds compat_symbol_unique functionality into compat_symbol. This change eliminates the need for intermediate aliases for defining multiple symbol versions, for both compat_symbol and versioned_symbol. Some binutils versions do not suport multiple versions per symbol on some targets, so aliases are automatically introduced, similar to what compat_symbol_unique did. To reduce symbol table sizes, a configure check is added to avoid these aliases if they are not needed. The new mechanism works with data symbols as well as function symbols, due to the way an assembler-level redirect is used. It is not compatible with weak symbols for old binutils versions, which is why the definition of __malloc_initialize_hook had to be changed. This is not a loss of functionality because weak symbols do not matter to dynamic linking. The placeholder symbol needs repeating in nptl/libpthread-compat.c now that compat_symbol is used, but that seems more obvious than introducing yet another macro. A subtle difference was that compat_symbol_unique made the symbol global automatically. compat_symbol does not do this, so static had to be removed from the definition of __libpthread_version_placeholder. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* tst: Add test for settimeofdayLukasz Majewski2021-03-082-1/+57
| | | | | | | | | | | | This code brings test to check if time on target machine is properly set. To avoid any issues with altering the time: - The time, which was set before the test was executed is restored. - The time is altered only when cross-test-ssh.sh is executed with --allow-time-setting flag Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* tst: Add test for clock_settimeLukasz Majewski2021-03-082-1/+46
| | | | | | | | | | | | This code brings test to check if time on target machine is properly set. To avoid any issues with altering the time: - The time, which was set before the test was executed is restored. - The time is altered only when cross-test-ssh.sh is executed with --allow-time-setting flag Reviewed-by: DJ Delorie <dj@redhat.com>
* tst: time: Provide Y2038 tests for mktime (tst-mktime4.c)Lukasz Majewski2021-02-162-1/+110
| | | | | | | | | | | | | This change adds new test to assess mktime's functionality. To be more specific - following use cases are checked: - Pass struct tm as epoch time - Pass struct tm as value just before Y2038 threshold (returned value shall be 0x7FFFFFFF) - Pass struct tm as the first value after Y2038 threshold (expected value - 0x80000000) Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* tst: Provide test for difftimeLukasz Majewski2021-02-162-1/+57
| | | | | | | | | | | This change adds new test to assess difftime's functionality by adding some arbitrary offsets to current time_t value (read via time). If 64 bit time_t is supported, the same procedure is applied around the threshold of Y2038 time overflow. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* tst: Provide test for ctimeLukasz Majewski2021-02-162-1/+57
| | | | | | | | | | | This change adds new test to assess ctime's functionality. To be more specific - following use cases are checked: - Pass time_t value as 0 to check if epoch time is converted - Pass time_t as max value for 32 bit systems - Pass time_t as the first value after Y2038 threshold Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
* Update copyright dates with scripts/update-copyrightsPaul Eggert2021-01-0256-56/+56
| | | | | | | | | | | | | | | | 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
* linux: Allow adjtime with NULL argument [BZ #26833]Adhemerval Zanella2020-11-092-1/+46
| | | | | | | | | | | The adjtime interface allows return the amount of time remaining from any previous adjustment that has not yet been completed by passing a NULL as first argument. This was introduced with y2038 support 0308077e3a. Checked on i686-linux-gnu. Reviewed-by: Lukasz Majewski <lukma@denx.de>
* Hurd: Fix ftime buildAdhemerval Zanella2020-10-271-25/+4
| | | | | | | | It does not provide __clock_gettime64, the ftime y2038 support is moved to a Linux specific implementation. Checked with a build for i686-linux-gnu and on x86_64-linux and i686-linux-gnu.
* time: Add 64-bit time_t support for ftimeAdhemerval Zanella2020-10-274-16/+41
| | | | | | | | | It basically calls the 64-bit __clock_gettime64 and adds the overflow check. Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Lukasz Majewski <lukma@denx.de>
* Reinstate ftime and add deprecate message on ftime usageAdhemerval Zanella2020-10-274-45/+63
| | | | | | | This patch revert "Move ftime to a compatibility symbol" (commit 14633d3e568eb9770a7e5046eff257113e0453fb). Checked on x86_64-linux-gnu and i686-linux-gnu.
* Remove timing related checks of time/tst-cpuclock1Stefan Liebler2020-10-261-59/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Starting with the commit 04deeaa9ea74b0679dfc9d9155a37b6425f19a9f "Fix time/tst-cpuclock1 intermitent failures" (2020-07-11), this test fails quite often on s390x/s390 with one/multiple of those: "before - after" / "nanosleep time" / "dead - after" ourside reasonable range. On a zVM/kvm guest the CPUs are shared between multiple guests. And even on the lpar (kvm host) the CPUs are usually shared between multiple lpars. The defined CPUs for a lpar/zVM-system could also have lower weights compared to other lpars which let the steal time further grow. Usually I build (-j$(nproc)) and test (PARALLELMFLAGS="-j$(nproc)") glibc multiple times, e.g. with different GCCs, on various lpars or zVM guests at the same time. During this time, I've run the test for 13500 times and obvserved the following fails: ~600x "before - after" ~60x "nanosleep time" ~70x "dead - after" I've also observed a lot of "before - after" fails on a intel kvm-guest while building/testing glibc on it. The mentioned commit has tighten the limits of valid tv_nsec ranges: "before - after" (expected: 500000000): - 100000000 ... 600000000 + 450000000 ... 550000000 "nanosleep time" (expected: 100000000): - 100000000 ... 200000000 + 090000000 ... 120000000 "dead - after" (expected: 100000000): - ... 200000000 + 090000000 ... 120000000 The test itself forks a child process which chew_cpu (user- and kernel-space). The parent process sleeps with nanosleep(0.5s) and measures the child_clock time: diff = after - before With much workload on the machine, the child won't make much progess and it can fall much beyond the minimum limit. Afterwards the parent process sleeps with clock_nanosleep (child_clock, 0.1s): diff = afterns - after The test currently also allows 0.9 * 0.1s which would be an error. Depending on the workload, the maximum limit can exceed the 1.2 * 0.1s. For "dead - after", the parent process kills the child process and waits long enough to let the child finish dying. Then it gets the time of the child: diff = dead - after Note that diff also contains the time for the previous clock_nanosleep. Thus you'll often see both fails at the same time. After discussion on the mailing list, we've decided to keep the functional checks for the clock* functions and remove the timing related checks as those are prone to false positives. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* Move ftime to a compatibility symbolAdhemerval Zanella2020-10-164-77/+50
| | | | | | | | | | It was made deprecated on 2.31, so it moves to compat symbol after two releases. It was also removed from exported symbol for riscv32 (since ABI will be supported on for 2.33). Checked on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Lukasz Majewski <lukma@denx.de>
* Remove internal usage of extensible stat functionsAdhemerval Zanella2020-09-112-3/+3
| | | | | | | | | | | | It replaces the internal usage of __{f,l}xstat{at}{64} with the __{f,l}stat{at}{64}. It should not change the generate code since sys/stat.h explicit defines redirections to internal calls back to xstat* symbols. Checked with a build for all affected ABIs. I also check on x86_64-linux-gnu and i686-linux-gnu. Reviewed-by: Lukasz Majewski <lukma@denx.de>
* Sync mktime.c from GnulibPaul Eggert2020-08-041-3/+3
| | | | | * time/mktime.c: Sync from Gnulib. This micro-optimizes three division-related computations.
* Fix time/tst-cpuclock1 intermitent failuresLucas A. M. Magalhaes2020-07-101-30/+22
| | | | | | | | | | | | | | This test fails intermittently in systems with heavy load as CLOCK_PROCESS_CPUTIME_ID is subject to scheduler pressure. Thus the test boundaries were relaxed to keep it from failing on such systems. A refactor of the spent time checking was made with some support functions. With the advantage to representing time jitter in percent of the target. The values used by the test boundaries are all empirical. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* Update timezone code from tzcode 2020aPaul Eggert2020-05-151-1/+1
| | | | | | | | | | | This patch updates files coming from tzcode to tzcode 2020a. This is mostly for better support for Internet RFC 8536, by adding support to zic for the Expires line (new to tzcode 2020a), the -b option (new to 2019b) and the -r option (new to 2019a). One trivial change to other glibc was needed. * time/tzfile.c (__tzfile_read): Adjust to tzcode private.h renaming. * timezone/private.h, timezone/tzfile.h, timezone/version: * timezone/zdump.c, timezone/zic.c: Update from tzcode 2020a.
* y2038: Export __clock_gettime64 to be usable in other librariesLukasz Majewski2020-05-051-0/+1
| | | | | | | In the glibc project calls to clock_gettime shall be replaced with __clock_gettime64, which is supporting 64 bit time. To allow that the __clock_gettime64 needs to be exported as a GLIBC_PRIVATE symbol.
* alpha: Fix static gettimeofday symbolAdhemerval Zanella2020-02-131-1/+3
| | | | | | | | By undef strong_alias on alpha implementation, the default_symbol_version macro becomes an empty macro on static build. It fixes the issue introduced at c953219420. Checked on alpha-linux-gnu with a 'make check run-built-tests=no'.
* alpha: Use generic gettimeofday implementationAdhemerval Zanella2020-02-121-6/+0
| | | | | | | | | It makes alpha no longer reports information about a system-wide time zone and moves the version logic on the alpha implementation. Checked on a build and check-abi for alpha-linux-gnu. Reviewed-by: Lukasz Majewski <lukma@denx.de>
* Update copyright dates with scripts/update-copyrights.Joseph Myers2020-01-0155-55/+55
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* Declare asctime_r, ctime_r, gmtime_r, localtime_r for C2X.Joseph Myers2019-11-111-4/+4
| | | | | | | | C2X adds the asctime_r, ctime_r, gmtime_r and localtime_r functions. This patch duly adds __GLIBC_USE (ISOC2X) to the conditions under which <time.h> declares them. Tested for x86_64.
* Refactor nanosleep in terms of clock_nanosleepAdhemerval Zanella2019-11-061-1/+1
| | | | | | | | | | | | | The generic version is straightforward. For Hurd, its nanosleep implementation is moved to clock_nanosleep with adjustments from generic unix implementation. The generic clock_nanosleep unix version is also removed since it calls nanosleep. Checked on x86_64-linux-gnu and powerpc64le-linux-gnu. Reviewed-by: Florian Weimer <fweimer@redhat.com>
* nptl: Move nanosleep implementation to libcAdhemerval Zanella2019-11-061-0/+1
| | | | | | | | | Checked on x86_64-linux-gnu and powerpc64le-linux-gnu. I also checked the libpthread.so .gnu.version_d entries for every ABI affected and all of them contains the required versions (including for architectures which exports __nanosleep with a different version). Reviewed-by: Florian Weimer <fweimer@redhat.com>
* Sync time/mktime.c with gnulibPaul Eggert2019-10-311-1/+1
| | | | | This syncs with gnulib commit 9e78024bad107fe786cc3e5e328a475921ea0873. * time/mktime.c: Update URL in comment.
* Make second argument of gettimeofday as 'void *'Zack Weinberg2019-10-302-13/+14
| | | | | | | | | | | | | Also make the public prototype of gettimeofday declare its second argument with type "void *" unconditionally, consistent with POSIX. It is also consistent with POSIX. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu, powerpc64-linux-gnu, powerpc-linux-gnu, and aarch64-linux-gnu. Co-authored-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Lukasz Majewski <lukma@denx.de>
* Use clock_gettime to implement gettimeofday.Adhemerval Zanella2019-10-301-10/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Consolidate generic gettimeofday implementation to use clock_gettime. Linux ports that still provide gettimeofday through vDSO are not changed. Remove sysdeps/unix/clock_gettime.c, which implemented clock_gettime using gettimeofday; new OS ports must provide a real implementation of clock_gettime. Rename sysdeps/mach/gettimeofday.c to sysdeps/mach/clock_gettime.c and convert into an implementation of clock_gettime. It only supports CLOCK_REALTIME; Mach does not appear to have any support for monotonic clocks. It uses __host_get_time, which provides at best microsecond resolution. Hurd is currently using sysdeps/posix/clock_getres.c for clock_getres; its output for CLOCK_REALTIME is based on sysconf (_SC_CLK_TCK), and I do not know whether that gives the correct result. Unlike settimeofday, there are no known uses of gettimeofday's vestigial "get time zone" feature that are not bugs. (The per-process timezone support in localtime and friends is unrelated, and the programs that set the kernel's offset between the hardware clock and UTC do not need to read it back.) Therefore, this feature is dummied out. Henceforth, if gettimeofday's "struct timezone" argument is not NULL, it will write zeroes to both fields. Any program that is actually looking at this data will thus think it is running in UTC, which is probably more correct than whatever it was doing before. [__]gettimeofday no longer has any internal callers, so we can now remove its internal prototype and PLT bypass aliases. The __gettimeofday@GLIBC_2.0 export remains, in case it is used by any third-party code. It also allows to simplify the arch-specific implementation on x86 and powerpc to remove the hack to disable the internal route to non iFUNC variant for internal symbol. This patch also fixes a missing optimization on aarch64, powerpc, and x86 where the code used on static build do not use the vDSO. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu, powerpc64-linux-gnu, powerpc-linux-gnu, and aarch64-linux-gnu. Co-authored-by: Zack Weinberg <zackw@panix.com> Reviewed-by: Lukasz Majewski <lukma@denx.de>
* Use clock_gettime to implement timespec_get.Zack Weinberg2019-10-301-10/+4
| | | | | | | | | | | | | | | | | | | | | timespec_get is the same function as clock_gettime, with an obnoxious coating of NIH painted on it by the ISO C committee. In addition to the rename, it takes its arguments in a different order, it returns 0 on *failure* or a positive number on *success*, and it requires that all of its TIME_* constants be positive. This last means we cannot directly reuse the existing CLOCK_* constants for it, because those have been allocated starting with CLOCK_REALTIME = 0 on all existing platforms. This patch simply promotes the sysdeps/posix implementation to universal, and removes the Linux-specific implementation, whose apparent reason for existing was to cut out one function call's worth of overhead. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu, powerpc64-linux-gnu, powerpc-linux-gnu, and aarch64-linux-gnu. Reviewed-by: Lukasz Majewski <lukma@denx.de>
* Consolidate and deprecate ftimeZack Weinberg2019-10-303-18/+18
| | | | | | | | | | | | | | | | | | | | | | | | | ftime is an obsolete variation on gettimeofday, offering only millisecond time resolution; it was probably a system call in ooold versions of BSD Unix. For historic reasons, we had three implementations of it. These are all consolidated into time/ftime.c, and then the function is deprecated. For some reason, the implementation of ftime in terms of gettimeofday was rounding rather than truncating microseconds to milliseconds. In all the other places where we use a higher-resolution time function to implement a lower-resolution one, we truncate. ftime is changed to match, just for tidiness' sake. Like gettimeofday, ftime tries to report the time zone, and using that information is always a bug. This patch dummies out the reported timezone information; the timezone and dstflag fields of the returned "struct timeb" will always be zero. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu, powerpc64-linux-gnu, and powerpc-linux-gnu. Co-authored-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Lukasz Majewski <lukma@denx.de>
* Change most internal uses of time to __clock_gettime.Adhemerval Zanella2019-10-302-2/+1
| | | | | | | | | | | | | | | | | As for gettimeofday, time will be implemented based on clock_gettime on all platforms and internal code should use clock_gettime directly. In addition to removing a layer of indirection, this will allow us to remove the PLT-bypass gunk for gettimeofday. The changed code always assumes __clock_gettime (CLOCK_REALTIME) or __clock_gettime (CLOCK_REALTIME_COARSE) (for Linux case) cannot fail, using the same rationale for gettimeofday change. And internal helper was added (time_now). Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu, powerpc64-linux-gnu, and powerpc-linux-gnu. Reviewed-by: Lukasz Majewski <lukma@denx.de>
* Use clock_gettime to implement time.Adhemerval Zanella2019-10-301-7/+6
| | | | | | | | | | | | | | | | | Change the default implementation of time to call clock_gettime, to align with new Linux ports that are expected to only implement __NR_clock_gettime. Arch-specific implementation that either call the time vDSO or route to gettimeofday vDSO are not removed. Also for Linux, CLOCK_REALTIME_COARSE is used instead of generic CLOCK_REALTIME clockid. This takes less CPU time and its behavior better matches what the current glibc does. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu, powerpc64-linux-gnu, powerpc-linux-gnu, and aarch64-linux-gnu. Co-authored-by: Zack Weinberg <zackw@panix.com> Reviewed-by: Lukasz Majewski <lukma@denx.de>
* Use clock_settime to implement settimeofday.Zack Weinberg2019-10-303-8/+52
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Unconditionally, on all ports, use clock_settime to implement settimeofday. Remove sysdeps/unix/clock_settime.c, which implemented clock_settime by calling settimeofday; new OS ports must henceforth provide a real implementation of clock_settime. Hurd had a real implementation of settimeofday but not of clock_settime; this patch converts it into an implementation of clock_settime. It only supports CLOCK_REALTIME and microsecond resolution; Hurd/Mach does not appear to have any support for finer-resolution clocks. The vestigial "set time zone" feature of settimeofday complicates the generic settimeofday implementation a little. The only remaining uses of this feature that aren't just bugs, are using it to inform the Linux kernel of the offset between the hardware clock and UTC, on systems where the hardware clock doesn't run in UTC (usually because of dual-booting with Windows). There currently isn't any other way to do this. However, the callers that do this call settimeofday with _only_ the timezone argument non-NULL. Therefore, glibc's new behavior is: callers of settimeofday must supply one and only one of the two arguments. If both arguments are non-NULL, or both arguments are NULL, the call fails and sets errno to EINVAL. When only the timeval argument is supplied, settimeofday calls __clock_settime(CLOCK_REALTIME), same as stime. When only the timezone argument is supplied, settimeofday calls a new internal function called __settimezone. On Linux, only, this function will pass the timezone structure to the settimeofday system call. On all other operating systems, and on Linux architectures that don't define __NR_settimeofday, __settimezone is a stub that always sets errno to ENOSYS and returns -1. The settimeoday syscall is enabled on Linux by the flag COMPAT_32BIT_TIME, which is an option to either 32-bits ABIs or COMPAT builds (defined usually by 64-bit kernels that want to support 32-bit ABIs, such as x86). The idea to future 64-bit time_t only ABIs is to not provide settimeofday syscall. The same semantics are implemented for Linux/Alpha's GLIBC_2.0 compat symbol for settimeofday. There are no longer any internal callers of __settimeofday, so the internal prototype is removed. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu, powerpc64-linux-gnu, powerpc-linux-gnu, and aarch64-linux-gnu. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Lukasz Majewski <lukma@denx.de>
* Use clock_settime to implement stime; withdraw stime.Zack Weinberg2019-10-302-18/+13
| | | | | | | | | | | | Unconditionally, on all ports, use clock_settime to implement stime, not settimeofday or a direct syscall. Then convert stime into a compatibility symbol and remove its prototype from time.h. Checked on x86_64-linux-gnu, i686-linux-gnu, powerpc64le-linux-gnu, powerpc64-linux-gnu, powerpc-linux-gnu, and aarch64-linux-gnu. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Lukasz Majewski <lukma@denx.de>
* time: Introduce function to check correctness of nanoseconds valueLukasz Majewski2019-10-271-2/+1
| | | | | | | | | | | | | | | The valid_nanoseconds () static inline function has been introduced to check if nanoseconds value is in the correct range - greater or equal to zero and less than 1000000000. The explicit #include <time.h> has been added to files where it was missing. The __syscall_slong_t type for ns has been used to avoid issues on x32. Tested with: - scripts/build-many-glibcs.py - make PARALLELMFLAGS="-j12" && make PARALLELMFLAGS="-j12" xcheck on x86_64
* Make tst-strftime2 and tst-strftime3 depend on locale generationGabriel F. T. Gomes2019-10-081-0/+2
| | | | | | | | | | | | Building the test cases in parallel might make tst-strftime2 and tst-strftime3 fail. Simply re-running the test case (or building serially) makes the problem go away. This patch adds the necessary dependency to allow parallel builds in the time subdirectory. Tested for powerpc64le. Reviewed-by: Florian Weimer <fweimer@redhat.com> Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-07-31 17:58:08 +0000