glibc/sysdeps/posix
Adhemerval Zanella 38cc11daa4 nptl: Remove pthread_clock_gettime pthread_clock_settime
This patch removes CLOCK_THREAD_CPUTIME_ID and CLOCK_PROCESS_CPUTIME_ID support
from clock_gettime and clock_settime generic implementation.  For Linux, kernel
already provides supports through the syscall and Hurd HTL lacks
__pthread_clock_gettime and __pthread_clock_settime internal implementation.

As described in clock_gettime man-page [1] on 'Historical note for SMP
system', implementing CLOCK_{THREAD,PROCESS}_CPUTIME_ID with timer registers
is error-prone and susceptible to timing and accurary issues that the libc
can not deal without kernel support.

This allows removes unused code which, however, still incur in some runtime
overhead in thread creation (the struct pthread cpuclock_offset
initialization).

If hurd eventually wants to support them it should either either implement as
a kernel facility (or something related due its architecture) or in system
specific implementation.

Checked on aarch64-linux-gnu, x86_64-linux-gnu, and i686-linux-gnu. I also
checked on a i686-gnu build.

	* nptl/Makefile (libpthread-routines): Remove pthread_clock_gettime and
	pthread_clock_settime.
	* nptl/pthreadP.h (__find_thread_by_id): Remove prototype.
	* elf/dl-support.c [!HP_TIMING_NOAVAIL] (_dl_cpuclock_offset): Remove.
	(_dl_non_dynamic_init): Remove _dl_cpuclock_offset setting.
	* elf/rtld.c (_dl_start_final): Likewise.
	* nptl/allocatestack.c (__find_thread_by_id): Remove function.
	* sysdeps/generic/ldsodefs.h [!HP_TIMING_NOAVAIL] (_dl_cpuclock_offset):
	Remove.
	* sysdeps/mach/hurd/dl-sysdep.c [!HP_TIMING_NOAVAIL]
	(_dl_cpuclock_offset): Remove.
	* nptl/descr.h (struct pthread): Rename cpuclock_offset to
	cpuclock_offset_ununsed.
	* nptl/nptl-init.c (__pthread_initialize_minimal_internal): Remove
	cpuclock_offset set.
	* nptl/pthread_create.c (START_THREAD_DEFN): Likewise.
	* sysdeps/nptl/fork.c (__libc_fork): Likewise.
	* nptl/pthread_clock_gettime.c: Remove file.
	* nptl/pthread_clock_settime.c: Likewise.
	* sysdeps/unix/clock_gettime.c (hp_timing_gettime): Remove function.
	[HP_TIMING_AVAIL] (realtime_gettime): Remove CLOCK_THREAD_CPUTIME_ID
	and CLOCK_PROCESS_CPUTIME_ID support.
	* sysdeps/unix/clock_settime.c (hp_timing_gettime): Likewise.
	[HP_TIMING_AVAIL] (realtime_gettime): Likewise.
	* sysdeps/posix/clock_getres.c (hp_timing_getres): Likewise.
	[HP_TIMING_AVAIL] (__clock_getres): Likewise.
	* sysdeps/unix/clock_nanosleep.c (CPUCLOCK_P, INVALID_CLOCK_P):
	Likewise.
	(__clock_nanosleep): Remove CPUCLOCK_P and INVALID_CLOCK_P usage.

[1] http://man7.org/linux/man-pages/man2/clock_gettime.2.html
2019-03-22 15:37:43 -03:00
..
alarm.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
clock_getres.c nptl: Remove pthread_clock_gettime pthread_clock_settime 2019-03-22 15:37:43 -03:00
clock.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
closedir.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
ctermid.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
cuserid.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
dirfd.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
dirstream.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
dl-fileid.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
dup2.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
dup.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
euidaccess.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
fdopendir.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
flock.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
fpathconf.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
gai_strerror-strs.h * sysdeps/posix/gai_strerror.c: Complete rewrite. Avoid relocations. 2005-12-20 17:53:00 +00:00
gai_strerror.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
getaddrinfo.c CVE-2016-10739: getaddrinfo: Fully parse IPv4 address strings [BZ #20018] 2019-01-21 21:26:03 +01:00
getcwd.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
getdtsz.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
gethostname.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
getpagesize.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
gettimeofday.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
isatty.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
isfdtype.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
killpg.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
libc_fatal.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
Makefile NPTL: Refactor named semaphore code to use shm-directory.h 2014-12-12 15:01:30 -08:00
mkfifo.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
mkfifoat.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
nice.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
open64.c nptl: Cleanup cancellation macros 2019-01-03 18:38:16 -02:00
opendir.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
pathconf.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
pause.c nptl: Remove tst-cancel-wrappers test and related macros 2019-01-03 18:38:08 -02:00
posix_fallocate64.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
posix_fallocate.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
pread64.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
pread.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
preadv2.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
preadv64.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
preadv64v2.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
preadv_common.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
preadv.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
profil.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
pwrite64.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
pwrite.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
pwritev2.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
pwritev64.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
pwritev64v2.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
pwritev_common.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
pwritev.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
raise.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
readdir_r.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
readdir.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
readv.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
remove.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
rename.c Break more lines before not after operators. 2019-02-25 13:19:19 +00:00
rewinddir.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
seekdir.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
shm_open.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
shm_unlink.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
shm-directory.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
shm-directory.h Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
sigblock.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
sigignore.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
sigintr.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
signal.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
sigpause.c nptl: Remove tst-cancel-wrappers test and related macros 2019-01-03 18:38:08 -02:00
sigset.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
sigsetmask.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
sigsuspend.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
sigwait.c nptl: Cleanup cancellation macros 2019-01-03 18:38:16 -02:00
sleep.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
spawni.c Add some spaces before '('. 2019-02-27 13:55:45 +00:00
sprofil.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
Subdirs Make sysdeps/posix bring in login subdir. 2015-07-23 17:04:22 -07:00
sysconf.c Remove obsolete, never-implemented XSI STREAMS declarations 2019-03-14 15:44:15 +01:00
system.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
sysv_signal.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
telldir.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
tempname.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
time.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
timespec_get.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
truncate.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
ttyname_r.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
ttyname.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
ulimit.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
usleep.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
utime.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
utimes.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
wait3.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
wait.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00
waitid.c nptl: Cleanup cancellation macros 2019-01-03 18:38:16 -02:00
writev.c Update copyright dates with scripts/update-copyrights. 2019-01-01 00:11:28 +00:00