mirror/glibc
2
0
Fork 0
mirror of git://sourceware.org/git/glibc.git synced 2025-02-23 13:09:58 +08:00
Code Issues Packages Projects Releases Wiki Activity

linux: Use 64-bit time_t syscall on clock_getcputclockid

Browse Source 
The syscall __NR_clock_getres_time64 (for 32-bit) or __NR_clock_getres
(for 64-bit) is used as default.  The 32-bit fallback is used iff
__ASSUME_TIME64_SYSCALLS is not defined, which assumes the kernel ABI
provides either __NR_rt_sigtimedwait (32-bit time_t).

Since the symbol does not use any type which might be affected by the
time_t, there is no need to add a 64-bit variant.

Checked on x86_64-linux-gnu and i686-linux-gnu (on 5.4 and on 4.15
kernel).

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Adhemerval Zanella 2020-07-07 17:25:00 -03:00
parent 94a83d8667
commit 7c7671767e
1 changed files with 15 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
sysdeps/unix/sysv/linux/clock_getcpuclockid.c
View File

@ -30,20 +30,25 @@ __clock_getcpuclockid (pid_t pid, clockid_t *clock_id)
const clockid_t pidclock = MAKE_PROCESS_CPUCLOCK (pid, CPUCLOCK_SCHED);
int r = INTERNAL_SYSCALL_CALL (clock_getres, pidclock, NULL);
if (!INTERNAL_SYSCALL_ERROR_P (r))
#ifndef __NR_clock_getres_time64
# define __NR_clock_getres_time64 __NR_clock_getres
#endif
int r = INTERNAL_SYSCALL_CALL (clock_getres_time64, pidclock, NULL);
#ifndef __ASSUME_TIME64_SYSCALLS
if (r != 0 && r == -ENOSYS)
r = INTERNAL_SYSCALL_CALL (clock_getres, pidclock, NULL);
#endif
if (r == 0)
{
*clock_id = pidclock;
return 0;
}
if (INTERNAL_SYSCALL_ERRNO (r) == EINVAL)
{
/* The clock_getres system call checked the PID for us. */
return ESRCH;
}
else
return INTERNAL_SYSCALL_ERRNO (r);
if (r == -EINVAL)
/* The clock_getres system call checked the PID for us. */
return ESRCH;
return -r;
}
versioned_symbol (libc, __clock_getcpuclockid, clock_getcpuclockid, GLIBC_2_17);