diff options
Diffstat (limited to 'vendor/rustix-0.37.6/src/backend/libc/mm')
| -rw-r--r-- | vendor/rustix-0.37.6/src/backend/libc/mm/mod.rs | 2 | ||||
| -rw-r--r-- | vendor/rustix-0.37.6/src/backend/libc/mm/syscalls.rs | 218 | ||||
| -rw-r--r-- | vendor/rustix-0.37.6/src/backend/libc/mm/types.rs | 366 |
3 files changed, 0 insertions, 586 deletions
diff --git a/vendor/rustix-0.37.6/src/backend/libc/mm/mod.rs b/vendor/rustix-0.37.6/src/backend/libc/mm/mod.rs deleted file mode 100644 index 1e0181a99..000000000 --- a/vendor/rustix-0.37.6/src/backend/libc/mm/mod.rs +++ /dev/null @@ -1,2 +0,0 @@ -pub(crate) mod syscalls; -pub(crate) mod types; diff --git a/vendor/rustix-0.37.6/src/backend/libc/mm/syscalls.rs b/vendor/rustix-0.37.6/src/backend/libc/mm/syscalls.rs deleted file mode 100644 index 16636f1b9..000000000 --- a/vendor/rustix-0.37.6/src/backend/libc/mm/syscalls.rs +++ /dev/null @@ -1,218 +0,0 @@ -//! libc syscalls supporting `rustix::mm`. - -use super::super::c; -#[cfg(any(target_os = "android", target_os = "linux"))] -use super::super::conv::syscall_ret_owned_fd; -use super::super::conv::{borrowed_fd, no_fd, ret}; -use super::super::offset::libc_mmap; -#[cfg(not(target_os = "redox"))] -use super::types::Advice; -#[cfg(any(target_os = "emscripten", target_os = "linux"))] -use super::types::MremapFlags; -use super::types::{MapFlags, MprotectFlags, MsyncFlags, ProtFlags}; -#[cfg(any(target_os = "android", target_os = "linux"))] -use super::types::{MlockFlags, UserfaultfdFlags}; -use crate::fd::BorrowedFd; -#[cfg(any(target_os = "android", target_os = "linux"))] -use crate::fd::OwnedFd; -use crate::io; - -#[cfg(not(target_os = "redox"))] -pub(crate) fn madvise(addr: *mut c::c_void, len: usize, advice: Advice) -> io::Result<()> { - // On Linux platforms, `MADV_DONTNEED` has the same value as - // `POSIX_MADV_DONTNEED` but different behavior. We remap it to a different - // value, and check for it here. - #[cfg(target_os = "linux")] - if let Advice::LinuxDontNeed = advice { - return unsafe { ret(c::madvise(addr, len, c::MADV_DONTNEED)) }; - } - - #[cfg(not(target_os = "android"))] - { - let err = unsafe { c::posix_madvise(addr, len, advice as c::c_int) }; - - // `posix_madvise` returns its error status rather than using `errno`. - if err == 0 { - Ok(()) - } else { - Err(io::Errno(err)) - } - } - - #[cfg(target_os = "android")] - { - if let Advice::DontNeed = advice { - // Do nothing. Linux's `MADV_DONTNEED` isn't the same as - // `POSIX_MADV_DONTNEED`, so just discard `MADV_DONTNEED`. - Ok(()) - } else { - unsafe { ret(c::madvise(addr, len, advice as c::c_int)) } - } - } -} - -pub(crate) unsafe fn msync(addr: *mut c::c_void, len: usize, flags: MsyncFlags) -> io::Result<()> { - let err = c::msync(addr, len, flags.bits()); - - // `msync` returns its error status rather than using `errno`. - if err == 0 { - Ok(()) - } else { - Err(io::Errno(err)) - } -} - -/// # Safety -/// -/// `mmap` is primarily unsafe due to the `addr` parameter, as anything working -/// with memory pointed to by raw pointers is unsafe. -pub(crate) unsafe fn mmap( - ptr: *mut c::c_void, - len: usize, - prot: ProtFlags, - flags: MapFlags, - fd: BorrowedFd<'_>, - offset: u64, -) -> io::Result<*mut c::c_void> { - let res = libc_mmap( - ptr, - len, - prot.bits(), - flags.bits(), - borrowed_fd(fd), - offset as i64, - ); - if res == c::MAP_FAILED { - Err(io::Errno::last_os_error()) - } else { - Ok(res) - } -} - -/// # Safety -/// -/// `mmap` is primarily unsafe due to the `addr` parameter, as anything working -/// with memory pointed to by raw pointers is unsafe. -pub(crate) unsafe fn mmap_anonymous( - ptr: *mut c::c_void, - len: usize, - prot: ProtFlags, - flags: MapFlags, -) -> io::Result<*mut c::c_void> { - let res = libc_mmap( - ptr, - len, - prot.bits(), - flags.bits() | c::MAP_ANONYMOUS, - no_fd(), - 0, - ); - if res == c::MAP_FAILED { - Err(io::Errno::last_os_error()) - } else { - Ok(res) - } -} - -pub(crate) unsafe fn mprotect( - ptr: *mut c::c_void, - len: usize, - flags: MprotectFlags, -) -> io::Result<()> { - ret(c::mprotect(ptr, len, flags.bits())) -} - -pub(crate) unsafe fn munmap(ptr: *mut c::c_void, len: usize) -> io::Result<()> { - ret(c::munmap(ptr, len)) -} - -/// # Safety -/// -/// `mremap` is primarily unsafe due to the `old_address` parameter, as -/// anything working with memory pointed to by raw pointers is unsafe. -#[cfg(any(target_os = "emscripten", target_os = "linux"))] -pub(crate) unsafe fn mremap( - old_address: *mut c::c_void, - old_size: usize, - new_size: usize, - flags: MremapFlags, -) -> io::Result<*mut c::c_void> { - let res = c::mremap(old_address, old_size, new_size, flags.bits()); - if res == c::MAP_FAILED { - Err(io::Errno::last_os_error()) - } else { - Ok(res) - } -} - -/// # Safety -/// -/// `mremap_fixed` is primarily unsafe due to the `old_address` and -/// `new_address` parameters, as anything working with memory pointed to by raw -/// pointers is unsafe. -#[cfg(any(target_os = "emscripten", target_os = "linux"))] -pub(crate) unsafe fn mremap_fixed( - old_address: *mut c::c_void, - old_size: usize, - new_size: usize, - flags: MremapFlags, - new_address: *mut c::c_void, -) -> io::Result<*mut c::c_void> { - let res = c::mremap( - old_address, - old_size, - new_size, - flags.bits() | c::MAP_FIXED, - new_address, - ); - if res == c::MAP_FAILED { - Err(io::Errno::last_os_error()) - } else { - Ok(res) - } -} - -/// # Safety -/// -/// `mlock` operates on raw pointers and may round out to the nearest page -/// boundaries. -#[inline] -pub(crate) unsafe fn mlock(addr: *mut c::c_void, length: usize) -> io::Result<()> { - ret(c::mlock(addr, length)) -} - -/// # Safety -/// -/// `mlock_with` operates on raw pointers and may round out to the nearest page -/// boundaries. -#[cfg(any(target_os = "android", target_os = "linux"))] -#[inline] -pub(crate) unsafe fn mlock_with( - addr: *mut c::c_void, - length: usize, - flags: MlockFlags, -) -> io::Result<()> { - weak_or_syscall! { - fn mlock2( - addr: *const c::c_void, - len: c::size_t, - flags: c::c_int - ) via SYS_mlock2 -> c::c_int - } - - ret(mlock2(addr, length, flags.bits())) -} - -/// # Safety -/// -/// `munlock` operates on raw pointers and may round out to the nearest page -/// boundaries. -#[inline] -pub(crate) unsafe fn munlock(addr: *mut c::c_void, length: usize) -> io::Result<()> { - ret(c::munlock(addr, length)) -} - -#[cfg(any(target_os = "android", target_os = "linux"))] -pub(crate) unsafe fn userfaultfd(flags: UserfaultfdFlags) -> io::Result<OwnedFd> { - syscall_ret_owned_fd(c::syscall(c::SYS_userfaultfd, flags.bits())) -} diff --git a/vendor/rustix-0.37.6/src/backend/libc/mm/types.rs b/vendor/rustix-0.37.6/src/backend/libc/mm/types.rs deleted file mode 100644 index cd6e521d2..000000000 --- a/vendor/rustix-0.37.6/src/backend/libc/mm/types.rs +++ /dev/null @@ -1,366 +0,0 @@ -use super::super::c; -use bitflags::bitflags; - -bitflags! { - /// `PROT_*` flags for use with [`mmap`]. - /// - /// For `PROT_NONE`, use `ProtFlags::empty()`. - /// - /// [`mmap`]: crate::io::mmap - pub struct ProtFlags: c::c_int { - /// `PROT_READ` - const READ = c::PROT_READ; - /// `PROT_WRITE` - const WRITE = c::PROT_WRITE; - /// `PROT_EXEC` - const EXEC = c::PROT_EXEC; - } -} - -bitflags! { - /// `PROT_*` flags for use with [`mprotect`]. - /// - /// For `PROT_NONE`, use `MprotectFlags::empty()`. - /// - /// [`mprotect`]: crate::io::mprotect - pub struct MprotectFlags: c::c_int { - /// `PROT_READ` - const READ = c::PROT_READ; - /// `PROT_WRITE` - const WRITE = c::PROT_WRITE; - /// `PROT_EXEC` - const EXEC = c::PROT_EXEC; - /// `PROT_GROWSUP` - #[cfg(any(target_os = "android", target_os = "linux"))] - const GROWSUP = c::PROT_GROWSUP; - /// `PROT_GROWSDOWN` - #[cfg(any(target_os = "android", target_os = "linux"))] - const GROWSDOWN = c::PROT_GROWSDOWN; - } -} - -bitflags! { - /// `MAP_*` flags for use with [`mmap`]. - /// - /// For `MAP_ANONYMOUS` (aka `MAP_ANON`), see [`mmap_anonymous`]. - /// - /// [`mmap`]: crate::io::mmap - /// [`mmap_anonymous`]: crates::io::mmap_anonymous - pub struct MapFlags: c::c_int { - /// `MAP_SHARED` - const SHARED = c::MAP_SHARED; - /// `MAP_SHARED_VALIDATE` - #[cfg(not(any( - bsd, - solarish, - target_os = "android", - target_os = "emscripten", - target_os = "fuchsia", - target_os = "haiku", - target_os = "redox", - )))] - const SHARED_VALIDATE = c::MAP_SHARED_VALIDATE; - /// `MAP_PRIVATE` - const PRIVATE = c::MAP_PRIVATE; - /// `MAP_DENYWRITE` - #[cfg(not(any( - bsd, - solarish, - target_os = "haiku", - target_os = "redox", - )))] - const DENYWRITE = c::MAP_DENYWRITE; - /// `MAP_FIXED` - const FIXED = c::MAP_FIXED; - /// `MAP_FIXED_NOREPLACE` - #[cfg(not(any( - bsd, - solarish, - target_os = "android", - target_os = "emscripten", - target_os = "fuchsia", - target_os = "haiku", - target_os = "redox", - )))] - const FIXED_NOREPLACE = c::MAP_FIXED_NOREPLACE; - /// `MAP_GROWSDOWN` - #[cfg(not(any( - bsd, - solarish, - target_os = "haiku", - target_os = "redox", - )))] - const GROWSDOWN = c::MAP_GROWSDOWN; - /// `MAP_HUGETLB` - #[cfg(not(any( - bsd, - solarish, - target_os = "haiku", - target_os = "redox", - )))] - const HUGETLB = c::MAP_HUGETLB; - /// `MAP_HUGE_2MB` - #[cfg(not(any( - bsd, - solarish, - target_os = "android", - target_os = "emscripten", - target_os = "fuchsia", - target_os = "haiku", - target_os = "redox", - )))] - const HUGE_2MB = c::MAP_HUGE_2MB; - /// `MAP_HUGE_1GB` - #[cfg(not(any( - bsd, - solarish, - target_os = "android", - target_os = "emscripten", - target_os = "fuchsia", - target_os = "haiku", - target_os = "redox", - )))] - const HUGE_1GB = c::MAP_HUGE_1GB; - /// `MAP_LOCKED` - #[cfg(not(any( - bsd, - solarish, - target_os = "haiku", - target_os = "redox", - )))] - const LOCKED = c::MAP_LOCKED; - /// `MAP_NOCORE` - #[cfg(freebsdlike)] - const NOCORE = c::MAP_NOCORE; - /// `MAP_NORESERVE` - #[cfg(not(any(freebsdlike, target_os = "redox")))] - const NORESERVE = c::MAP_NORESERVE; - /// `MAP_NOSYNC` - #[cfg(freebsdlike)] - const NOSYNC = c::MAP_NOSYNC; - /// `MAP_POPULATE` - #[cfg(not(any( - bsd, - solarish, - target_os = "haiku", - target_os = "redox", - )))] - const POPULATE = c::MAP_POPULATE; - /// `MAP_STACK` - #[cfg(not(any( - apple, - solarish, - target_os = "dragonfly", - target_os = "haiku", - target_os = "netbsd", - target_os = "redox", - )))] - const STACK = c::MAP_STACK; - /// `MAP_PREFAULT_READ` - #[cfg(target_os = "freebsd")] - const PREFAULT_READ = c::MAP_PREFAULT_READ; - /// `MAP_SYNC` - #[cfg(not(any( - bsd, - solarish, - target_os = "android", - target_os = "emscripten", - target_os = "fuchsia", - target_os = "haiku", - target_os = "redox", - all( - any(target_os = "android", target_os = "linux"), - any(target_arch = "mips", target_arch = "mips64"), - ) - )))] - const SYNC = c::MAP_SYNC; - /// `MAP_UNINITIALIZED` - #[cfg(any())] - const UNINITIALIZED = c::MAP_UNINITIALIZED; - } -} - -#[cfg(any(target_os = "emscripten", target_os = "linux"))] -bitflags! { - /// `MREMAP_*` flags for use with [`mremap`]. - /// - /// For `MREMAP_FIXED`, see [`mremap_fixed`]. - /// - /// [`mremap`]: crate::io::mremap - /// [`mremap_fixed`]: crate::io::mremap_fixed - pub struct MremapFlags: i32 { - /// `MREMAP_MAYMOVE` - const MAYMOVE = c::MREMAP_MAYMOVE; - } -} - -bitflags! { - /// `MS_*` flags for use with [`msync`]. - /// - /// [`msync`]: crate::io::msync - pub struct MsyncFlags: i32 { - /// `MS_SYNC`—Requests an update and waits for it to complete. - const SYNC = c::MS_SYNC; - /// `MS_ASYNC`—Specifies that an update be scheduled, but the call - /// returns immediately. - const ASYNC = c::MS_ASYNC; - /// `MS_INVALIDATE`—Asks to invalidate other mappings of the same - /// file (so that they can be updated with the fresh values just - /// written). - const INVALIDATE = c::MS_INVALIDATE; - } -} - -#[cfg(any(target_os = "android", target_os = "linux"))] -bitflags! { - /// `MLOCK_*` flags for use with [`mlock_with`]. - /// - /// [`mlock_with`]: crate::io::mlock_with - pub struct MlockFlags: i32 { - /// `MLOCK_ONFAULT` - const ONFAULT = c::MLOCK_ONFAULT as _; - } -} - -/// `POSIX_MADV_*` constants for use with [`madvise`]. -/// -/// [`madvise`]: crate::mm::madvise -#[cfg(not(target_os = "redox"))] -#[derive(Debug, Copy, Clone, Eq, PartialEq)] -#[repr(i32)] -#[non_exhaustive] -pub enum Advice { - /// `POSIX_MADV_NORMAL` - #[cfg(not(any(target_os = "android", target_os = "haiku")))] - Normal = c::POSIX_MADV_NORMAL, - - /// `POSIX_MADV_NORMAL` - #[cfg(any(target_os = "android", target_os = "haiku"))] - Normal = c::MADV_NORMAL, - - /// `POSIX_MADV_SEQUENTIAL` - #[cfg(not(any(target_os = "android", target_os = "haiku")))] - Sequential = c::POSIX_MADV_SEQUENTIAL, - - /// `POSIX_MADV_SEQUENTIAL` - #[cfg(any(target_os = "android", target_os = "haiku"))] - Sequential = c::MADV_SEQUENTIAL, - - /// `POSIX_MADV_RANDOM` - #[cfg(not(any(target_os = "android", target_os = "haiku")))] - Random = c::POSIX_MADV_RANDOM, - - /// `POSIX_MADV_RANDOM` - #[cfg(any(target_os = "android", target_os = "haiku"))] - Random = c::MADV_RANDOM, - - /// `POSIX_MADV_WILLNEED` - #[cfg(not(any(target_os = "android", target_os = "haiku")))] - WillNeed = c::POSIX_MADV_WILLNEED, - - /// `POSIX_MADV_WILLNEED` - #[cfg(any(target_os = "android", target_os = "haiku"))] - WillNeed = c::MADV_WILLNEED, - - /// `POSIX_MADV_DONTNEED` - #[cfg(not(any(target_os = "android", target_os = "emscripten", target_os = "haiku")))] - DontNeed = c::POSIX_MADV_DONTNEED, - - /// `POSIX_MADV_DONTNEED` - #[cfg(any(target_os = "android", target_os = "haiku"))] - DontNeed = i32::MAX - 1, - - /// `MADV_DONTNEED` - // `MADV_DONTNEED` has the same value as `POSIX_MADV_DONTNEED`. We don't - // have a separate `posix_madvise` from `madvise`, so we expose a special - // value which we special-case. - #[cfg(target_os = "linux")] - LinuxDontNeed = i32::MAX, - - /// `MADV_DONTNEED` - #[cfg(target_os = "android")] - LinuxDontNeed = c::MADV_DONTNEED, - /// `MADV_FREE` - #[cfg(any(target_os = "android", target_os = "linux"))] - LinuxFree = c::MADV_FREE, - /// `MADV_REMOVE` - #[cfg(any(target_os = "android", target_os = "linux"))] - LinuxRemove = c::MADV_REMOVE, - /// `MADV_DONTFORK` - #[cfg(any(target_os = "android", target_os = "linux"))] - LinuxDontFork = c::MADV_DONTFORK, - /// `MADV_DOFORK` - #[cfg(any(target_os = "android", target_os = "linux"))] - LinuxDoFork = c::MADV_DOFORK, - /// `MADV_HWPOISON` - #[cfg(any(target_os = "android", target_os = "linux"))] - LinuxHwPoison = c::MADV_HWPOISON, - /// `MADV_SOFT_OFFLINE` - #[cfg(all( - any(target_os = "android", target_os = "linux"), - not(any(target_arch = "mips", target_arch = "mips64")), - ))] - LinuxSoftOffline = c::MADV_SOFT_OFFLINE, - /// `MADV_MERGEABLE` - #[cfg(any(target_os = "android", target_os = "linux"))] - LinuxMergeable = c::MADV_MERGEABLE, - /// `MADV_UNMERGEABLE` - #[cfg(any(target_os = "android", target_os = "linux"))] - LinuxUnmergeable = c::MADV_UNMERGEABLE, - /// `MADV_HUGEPAGE` (since Linux 2.6.38) - #[cfg(any(target_os = "android", target_os = "linux"))] - LinuxHugepage = c::MADV_HUGEPAGE, - /// `MADV_NOHUGEPAGE` (since Linux 2.6.38) - #[cfg(any(target_os = "android", target_os = "linux"))] - LinuxNoHugepage = c::MADV_NOHUGEPAGE, - /// `MADV_DONTDUMP` (since Linux 3.4) - #[cfg(any(target_os = "android", target_os = "linux"))] - LinuxDontDump = c::MADV_DONTDUMP, - /// `MADV_DODUMP` (since Linux 3.4) - #[cfg(any(target_os = "android", target_os = "linux"))] - LinuxDoDump = c::MADV_DODUMP, - /// `MADV_WIPEONFORK` (since Linux 4.14) - #[cfg(any(target_os = "android", target_os = "linux"))] - #[cfg(feature = "mm")] - LinuxWipeOnFork = linux_raw_sys::general::MADV_WIPEONFORK as i32, - /// `MADV_KEEPONFORK` (since Linux 4.14) - #[cfg(any(target_os = "android", target_os = "linux"))] - #[cfg(feature = "mm")] - LinuxKeepOnFork = linux_raw_sys::general::MADV_KEEPONFORK as i32, - /// `MADV_COLD` (since Linux 5.4) - #[cfg(any(target_os = "android", target_os = "linux"))] - #[cfg(feature = "mm")] - LinuxCold = linux_raw_sys::general::MADV_COLD as i32, - /// `MADV_PAGEOUT` (since Linux 5.4) - #[cfg(any(target_os = "android", target_os = "linux"))] - #[cfg(feature = "mm")] - LinuxPageOut = linux_raw_sys::general::MADV_PAGEOUT as i32, - /// `MADV_POPULATE_READ` (since Linux 5.14) - #[cfg(any(target_os = "android", target_os = "linux"))] - #[cfg(feature = "mm")] - LinuxPopulateRead = linux_raw_sys::general::MADV_POPULATE_READ as i32, - /// `MADV_POPULATE_WRITE` (since Linux 5.14) - #[cfg(any(target_os = "android", target_os = "linux"))] - #[cfg(feature = "mm")] - LinuxPopulateWrite = linux_raw_sys::general::MADV_POPULATE_WRITE as i32, -} - -#[cfg(target_os = "emscripten")] -impl Advice { - /// `POSIX_MADV_DONTNEED` - #[allow(non_upper_case_globals)] - pub const DontNeed: Self = Self::Normal; -} - -#[cfg(any(target_os = "android", target_os = "linux"))] -bitflags! { - /// `O_*` flags for use with [`userfaultfd`]. - /// - /// [`userfaultfd`]: crate::io::userfaultfd - pub struct UserfaultfdFlags: c::c_int { - /// `O_CLOEXEC` - const CLOEXEC = c::O_CLOEXEC; - /// `O_NONBLOCK` - const NONBLOCK = c::O_NONBLOCK; - } -} |