diff options
Diffstat (limited to 'vendor/rustix/src/backend/libc/time/syscalls.rs')
| -rw-r--r-- | vendor/rustix/src/backend/libc/time/syscalls.rs | 401 |
1 files changed, 190 insertions, 211 deletions
diff --git a/vendor/rustix/src/backend/libc/time/syscalls.rs b/vendor/rustix/src/backend/libc/time/syscalls.rs index 14ca22b2d..603a3b108 100644 --- a/vendor/rustix/src/backend/libc/time/syscalls.rs +++ b/vendor/rustix/src/backend/libc/time/syscalls.rs @@ -2,13 +2,14 @@ use crate::backend::c; use crate::backend::conv::ret; +#[cfg(any(linux_kernel, target_os = "fuchsia"))] +#[cfg(feature = "time")] +#[cfg(any(all(target_env = "gnu", fix_y2038), not(fix_y2038)))] +use crate::backend::time::types::LibcItimerspec; #[cfg(not(target_os = "wasi"))] use crate::clockid::{ClockId, DynamicClockId}; use crate::io; -#[cfg(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", -))] +#[cfg(all(target_env = "gnu", fix_y2038))] use crate::timespec::LibcTimespec; use crate::timespec::Timespec; use core::mem::MaybeUninit; @@ -16,36 +17,22 @@ use core::mem::MaybeUninit; #[cfg(feature = "time")] use { crate::backend::conv::{borrowed_fd, ret_owned_fd}, - crate::backend::time::types::LibcItimerspec, crate::fd::{BorrowedFd, OwnedFd}, crate::time::{Itimerspec, TimerfdClockId, TimerfdFlags, TimerfdTimerFlags}, }; -#[cfg(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", -))] +#[cfg(all(target_env = "gnu", fix_y2038))] weak!(fn __clock_gettime64(c::clockid_t, *mut LibcTimespec) -> c::c_int); -#[cfg(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", -))] +#[cfg(all(target_env = "gnu", fix_y2038))] weak!(fn __clock_settime64(c::clockid_t, *const LibcTimespec) -> c::c_int); -#[cfg(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", -))] +#[cfg(all(target_env = "gnu", fix_y2038))] weak!(fn __clock_getres64(c::clockid_t, *mut LibcTimespec) -> c::c_int); -#[cfg(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", -))] +#[cfg(any(linux_kernel, target_os = "fuchsia"))] +#[cfg(all(target_env = "gnu", fix_y2038))] #[cfg(feature = "time")] weak!(fn __timerfd_gettime64(c::c_int, *mut LibcItimerspec) -> c::c_int); -#[cfg(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", -))] +#[cfg(any(linux_kernel, target_os = "fuchsia"))] +#[cfg(all(target_env = "gnu", fix_y2038))] #[cfg(feature = "time")] weak!(fn __timerfd_settime64(c::c_int, c::c_int, *const LibcItimerspec, *mut LibcItimerspec) -> c::c_int); @@ -53,28 +40,24 @@ weak!(fn __timerfd_settime64(c::c_int, c::c_int, *const LibcItimerspec, *mut Lib #[inline] #[must_use] pub(crate) fn clock_getres(id: ClockId) -> Timespec { - // 32-bit gnu version: libc has `clock_getres` but it is not y2038 safe by - // default. - #[cfg(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", - ))] - unsafe { - let mut timespec = MaybeUninit::<LibcTimespec>::uninit(); - + // Old 32-bit version: libc has `clock_getres` but it is not y2038 safe by + // default. But there may be a `__clock_getres64` we can use. + #[cfg(fix_y2038)] + { + #[cfg(target_env = "gnu")] if let Some(libc_clock_getres) = __clock_getres64.get() { - ret(libc_clock_getres(id as c::clockid_t, timespec.as_mut_ptr())).unwrap(); - timespec.assume_init().into() - } else { - clock_getres_old(id) + let mut timespec = MaybeUninit::<LibcTimespec>::uninit(); + unsafe { + ret(libc_clock_getres(id as c::clockid_t, timespec.as_mut_ptr())).unwrap(); + return timespec.assume_init().into(); + } } + + clock_getres_old(id) } // Main version: libc is y2038 safe and has `clock_getres`. - #[cfg(not(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", - )))] + #[cfg(not(fix_y2038))] unsafe { let mut timespec = MaybeUninit::<Timespec>::uninit(); let _ = c::clock_getres(id as c::clockid_t, timespec.as_mut_ptr()); @@ -82,19 +65,20 @@ pub(crate) fn clock_getres(id: ClockId) -> Timespec { } } -#[cfg(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", -))] +#[cfg(fix_y2038)] #[must_use] -unsafe fn clock_getres_old(id: ClockId) -> Timespec { +fn clock_getres_old(id: ClockId) -> Timespec { let mut old_timespec = MaybeUninit::<c::timespec>::uninit(); - ret(c::clock_getres( - id as c::clockid_t, - old_timespec.as_mut_ptr(), - )) - .unwrap(); - let old_timespec = old_timespec.assume_init(); + + let old_timespec = unsafe { + ret(c::clock_getres( + id as c::clockid_t, + old_timespec.as_mut_ptr(), + )) + .unwrap(); + old_timespec.assume_init() + }; + Timespec { tv_sec: old_timespec.tv_sec.into(), tv_nsec: old_timespec.tv_nsec.into(), @@ -105,33 +89,31 @@ unsafe fn clock_getres_old(id: ClockId) -> Timespec { #[inline] #[must_use] pub(crate) fn clock_gettime(id: ClockId) -> Timespec { - #[cfg(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", - ))] - unsafe { - let mut timespec = MaybeUninit::<LibcTimespec>::uninit(); - + // Old 32-bit version: libc has `clock_gettime` but it is not y2038 safe by + // default. But there may be a `__clock_gettime64` we can use. + #[cfg(fix_y2038)] + { + #[cfg(target_env = "gnu")] if let Some(libc_clock_gettime) = __clock_gettime64.get() { - ret(libc_clock_gettime( - id as c::clockid_t, - timespec.as_mut_ptr(), - )) - .unwrap(); - timespec.assume_init().into() - } else { - clock_gettime_old(id) + let mut timespec = MaybeUninit::<LibcTimespec>::uninit(); + unsafe { + ret(libc_clock_gettime( + id as c::clockid_t, + timespec.as_mut_ptr(), + )) + .unwrap(); + return timespec.assume_init().into(); + } } + + clock_gettime_old(id) } // Use `unwrap()` here because `clock_getres` can fail if the clock itself // overflows a number of seconds, but if that happens, the monotonic clocks // can't maintain their invariants, or the realtime clocks aren't properly // configured. - #[cfg(not(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", - )))] + #[cfg(not(fix_y2038))] unsafe { let mut timespec = MaybeUninit::<Timespec>::uninit(); ret(c::clock_gettime(id as c::clockid_t, timespec.as_mut_ptr())).unwrap(); @@ -139,19 +121,20 @@ pub(crate) fn clock_gettime(id: ClockId) -> Timespec { } } -#[cfg(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", -))] +#[cfg(fix_y2038)] #[must_use] -unsafe fn clock_gettime_old(id: ClockId) -> Timespec { +fn clock_gettime_old(id: ClockId) -> Timespec { let mut old_timespec = MaybeUninit::<c::timespec>::uninit(); - ret(c::clock_gettime( - id as c::clockid_t, - old_timespec.as_mut_ptr(), - )) - .unwrap(); - let old_timespec = old_timespec.assume_init(); + + let old_timespec = unsafe { + ret(c::clock_gettime( + id as c::clockid_t, + old_timespec.as_mut_ptr(), + )) + .unwrap(); + old_timespec.assume_init() + }; + Timespec { tv_sec: old_timespec.tv_sec.into(), tv_nsec: old_timespec.tv_nsec.into(), @@ -161,83 +144,85 @@ unsafe fn clock_gettime_old(id: ClockId) -> Timespec { #[cfg(not(target_os = "wasi"))] #[inline] pub(crate) fn clock_gettime_dynamic(id: DynamicClockId<'_>) -> io::Result<Timespec> { - unsafe { - let id: c::clockid_t = match id { - DynamicClockId::Known(id) => id as c::clockid_t, - - #[cfg(linux_kernel)] - DynamicClockId::Dynamic(fd) => { - use crate::fd::AsRawFd; - const CLOCKFD: i32 = 3; - (!fd.as_raw_fd() << 3) | CLOCKFD - } + let id: c::clockid_t = match id { + DynamicClockId::Known(id) => id as c::clockid_t, + + #[cfg(linux_kernel)] + DynamicClockId::Dynamic(fd) => { + use crate::fd::AsRawFd; + const CLOCKFD: i32 = 3; + (!fd.as_raw_fd() << 3) | CLOCKFD + } - #[cfg(not(linux_kernel))] - DynamicClockId::Dynamic(_fd) => { - // Dynamic clocks are not supported on this platform. - return Err(io::Errno::INVAL); - } + #[cfg(not(linux_kernel))] + DynamicClockId::Dynamic(_fd) => { + // Dynamic clocks are not supported on this platform. + return Err(io::Errno::INVAL); + } - #[cfg(linux_kernel)] - DynamicClockId::RealtimeAlarm => c::CLOCK_REALTIME_ALARM, + #[cfg(linux_kernel)] + DynamicClockId::RealtimeAlarm => c::CLOCK_REALTIME_ALARM, - #[cfg(linux_kernel)] - DynamicClockId::Tai => c::CLOCK_TAI, + #[cfg(linux_kernel)] + DynamicClockId::Tai => c::CLOCK_TAI, - #[cfg(any(linux_kernel, target_os = "openbsd"))] - DynamicClockId::Boottime => c::CLOCK_BOOTTIME, + #[cfg(any( + freebsdlike, + linux_kernel, + target_os = "fuchsia", + target_os = "openbsd" + ))] + DynamicClockId::Boottime => c::CLOCK_BOOTTIME, - #[cfg(linux_kernel)] - DynamicClockId::BoottimeAlarm => c::CLOCK_BOOTTIME_ALARM, - }; + #[cfg(any(linux_kernel, target_os = "fuchsia"))] + DynamicClockId::BoottimeAlarm => c::CLOCK_BOOTTIME_ALARM, + }; - #[cfg(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", - ))] - { + // Old 32-bit version: libc has `clock_gettime` but it is not y2038 + // safe by default. But there may be a `__clock_gettime64` we can use. + #[cfg(fix_y2038)] + { + #[cfg(target_env = "gnu")] + if let Some(libc_clock_gettime) = __clock_gettime64.get() { let mut timespec = MaybeUninit::<LibcTimespec>::uninit(); - - if let Some(libc_clock_gettime) = __clock_gettime64.get() { + unsafe { ret(libc_clock_gettime( id as c::clockid_t, timespec.as_mut_ptr(), ))?; - Ok(timespec.assume_init().into()) - } else { - clock_gettime_dynamic_old(id) + return Ok(timespec.assume_init().into()); } } - #[cfg(not(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", - )))] - { - let mut timespec = MaybeUninit::<Timespec>::uninit(); + clock_gettime_dynamic_old(id) + } + + // Main version: libc is y2038 safe and has `clock_gettime`. + #[cfg(not(fix_y2038))] + unsafe { + let mut timespec = MaybeUninit::<Timespec>::uninit(); - ret(c::clock_gettime(id as c::clockid_t, timespec.as_mut_ptr()))?; + ret(c::clock_gettime(id as c::clockid_t, timespec.as_mut_ptr()))?; - Ok(timespec.assume_init()) - } + Ok(timespec.assume_init()) } } -#[cfg(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", -))] +#[cfg(fix_y2038)] #[inline] -unsafe fn clock_gettime_dynamic_old(id: c::clockid_t) -> io::Result<Timespec> { +fn clock_gettime_dynamic_old(id: c::clockid_t) -> io::Result<Timespec> { let mut old_timespec = MaybeUninit::<c::timespec>::uninit(); - ret(c::clock_gettime( - id as c::clockid_t, - old_timespec.as_mut_ptr(), - ))?; + let old_timespec = unsafe { + ret(c::clock_gettime( + id as c::clockid_t, + old_timespec.as_mut_ptr(), + ))?; + + old_timespec.assume_init() + }; - let old_timespec = old_timespec.assume_init(); Ok(Timespec { tv_sec: old_timespec.tv_sec.into(), tv_nsec: old_timespec.tv_nsec.into(), @@ -251,25 +236,25 @@ unsafe fn clock_gettime_dynamic_old(id: c::clockid_t) -> io::Result<Timespec> { )))] #[inline] pub(crate) fn clock_settime(id: ClockId, timespec: Timespec) -> io::Result<()> { - #[cfg(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", - ))] - unsafe { + // Old 32-bit version: libc has `clock_gettime` but it is not y2038 safe by + // default. But there may be a `__clock_settime64` we can use. + #[cfg(fix_y2038)] + { + #[cfg(target_env = "gnu")] if let Some(libc_clock_settime) = __clock_settime64.get() { - let mut new_timespec = core::mem::zeroed::<LibcTimespec>(); - new_timespec.tv_sec = timespec.tv_sec; - new_timespec.tv_nsec = timespec.tv_nsec as _; - ret(libc_clock_settime(id as c::clockid_t, &new_timespec)) - } else { - clock_settime_old(id, timespec) + unsafe { + let mut new_timespec = core::mem::zeroed::<LibcTimespec>(); + new_timespec.tv_sec = timespec.tv_sec; + new_timespec.tv_nsec = timespec.tv_nsec as _; + return ret(libc_clock_settime(id as c::clockid_t, &new_timespec)); + } } + + clock_settime_old(id, timespec) } - #[cfg(not(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", - )))] + // Main version: libc is y2038 safe and has `clock_settime`. + #[cfg(not(fix_y2038))] unsafe { ret(c::clock_settime(id as c::clockid_t, ×pec)) } @@ -280,11 +265,8 @@ pub(crate) fn clock_settime(id: ClockId, timespec: Timespec) -> io::Result<()> { target_os = "wasi", all(apple, not(target_os = "macos")) )))] -#[cfg(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", -))] -unsafe fn clock_settime_old(id: ClockId, timespec: Timespec) -> io::Result<()> { +#[cfg(fix_y2038)] +fn clock_settime_old(id: ClockId, timespec: Timespec) -> io::Result<()> { let old_timespec = c::timespec { tv_sec: timespec .tv_sec @@ -292,7 +274,8 @@ unsafe fn clock_settime_old(id: ClockId, timespec: Timespec) -> io::Result<()> { .map_err(|_| io::Errno::OVERFLOW)?, tv_nsec: timespec.tv_nsec as _, }; - ret(c::clock_settime(id as c::clockid_t, &old_timespec)) + + unsafe { ret(c::clock_settime(id as c::clockid_t, &old_timespec)) } } #[cfg(any(linux_kernel, target_os = "fuchsia"))] @@ -308,31 +291,30 @@ pub(crate) fn timerfd_settime( flags: TimerfdTimerFlags, new_value: &Itimerspec, ) -> io::Result<Itimerspec> { - let mut result = MaybeUninit::<LibcItimerspec>::uninit(); - - #[cfg(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", - ))] - unsafe { + // Old 32-bit version: libc has `timerfd_settime` but it is not y2038 safe + // by default. But there may be a `__timerfd_settime64` we can use. + #[cfg(fix_y2038)] + { + #[cfg(target_env = "gnu")] if let Some(libc_timerfd_settime) = __timerfd_settime64.get() { - ret(libc_timerfd_settime( - borrowed_fd(fd), - bitflags_bits!(flags), - &new_value.clone().into(), - result.as_mut_ptr(), - ))?; - Ok(result.assume_init().into()) - } else { - timerfd_settime_old(fd, flags, new_value) + let mut result = MaybeUninit::<LibcItimerspec>::uninit(); + unsafe { + ret(libc_timerfd_settime( + borrowed_fd(fd), + bitflags_bits!(flags), + &new_value.clone().into(), + result.as_mut_ptr(), + ))?; + return Ok(result.assume_init().into()); + } } + + timerfd_settime_old(fd, flags, new_value) } - #[cfg(not(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", - )))] + #[cfg(not(fix_y2038))] unsafe { + let mut result = MaybeUninit::<LibcItimerspec>::uninit(); ret(c::timerfd_settime( borrowed_fd(fd), bitflags_bits!(flags), @@ -344,12 +326,9 @@ pub(crate) fn timerfd_settime( } #[cfg(any(linux_kernel, target_os = "fuchsia"))] -#[cfg(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", -))] +#[cfg(fix_y2038)] #[cfg(feature = "time")] -unsafe fn timerfd_settime_old( +fn timerfd_settime_old( fd: BorrowedFd<'_>, flags: TimerfdTimerFlags, new_value: &Itimerspec, @@ -384,14 +363,16 @@ unsafe fn timerfd_settime_old( }, }; - ret(c::timerfd_settime( - borrowed_fd(fd), - bitflags_bits!(flags), - &old_new_value, - old_result.as_mut_ptr(), - ))?; + let old_result = unsafe { + ret(c::timerfd_settime( + borrowed_fd(fd), + bitflags_bits!(flags), + &old_new_value, + old_result.as_mut_ptr(), + ))?; + old_result.assume_init() + }; - let old_result = old_result.assume_init(); Ok(Itimerspec { it_interval: Timespec { tv_sec: old_result @@ -415,43 +396,41 @@ unsafe fn timerfd_settime_old( #[cfg(any(linux_kernel, target_os = "fuchsia"))] #[cfg(feature = "time")] pub(crate) fn timerfd_gettime(fd: BorrowedFd<'_>) -> io::Result<Itimerspec> { - let mut result = MaybeUninit::<LibcItimerspec>::uninit(); - - #[cfg(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", - ))] - unsafe { + // Old 32-bit version: libc has `timerfd_gettime` but it is not y2038 safe + // by default. But there may be a `__timerfd_gettime64` we can use. + #[cfg(fix_y2038)] + { + #[cfg(target_env = "gnu")] if let Some(libc_timerfd_gettime) = __timerfd_gettime64.get() { - ret(libc_timerfd_gettime(borrowed_fd(fd), result.as_mut_ptr()))?; - Ok(result.assume_init().into()) - } else { - timerfd_gettime_old(fd) + let mut result = MaybeUninit::<LibcItimerspec>::uninit(); + unsafe { + ret(libc_timerfd_gettime(borrowed_fd(fd), result.as_mut_ptr()))?; + return Ok(result.assume_init().into()); + } } + + timerfd_gettime_old(fd) } - #[cfg(not(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", - )))] + #[cfg(not(fix_y2038))] unsafe { + let mut result = MaybeUninit::<LibcItimerspec>::uninit(); ret(c::timerfd_gettime(borrowed_fd(fd), result.as_mut_ptr()))?; Ok(result.assume_init()) } } #[cfg(any(linux_kernel, target_os = "fuchsia"))] -#[cfg(all( - any(target_arch = "arm", target_arch = "mips", target_arch = "x86"), - target_env = "gnu", -))] +#[cfg(fix_y2038)] #[cfg(feature = "time")] -unsafe fn timerfd_gettime_old(fd: BorrowedFd<'_>) -> io::Result<Itimerspec> { +fn timerfd_gettime_old(fd: BorrowedFd<'_>) -> io::Result<Itimerspec> { let mut old_result = MaybeUninit::<c::itimerspec>::uninit(); - ret(c::timerfd_gettime(borrowed_fd(fd), old_result.as_mut_ptr()))?; + let old_result = unsafe { + ret(c::timerfd_gettime(borrowed_fd(fd), old_result.as_mut_ptr()))?; + old_result.assume_init() + }; - let old_result = old_result.assume_init(); Ok(Itimerspec { it_interval: Timespec { tv_sec: old_result |