std: move platform modules into sys::pal

compiler/rustc_middle/src/ty/print/pretty.rs

@@ -508,29 +508,29 @@ pub trait PrettyPrinter<'tcx>: Printer<'tcx> + fmt::Write {
             // we need to handle re-exports correctly.
             //
             // For example, take `std::os::unix::process::CommandExt`, this trait is actually
-            // defined at `std::sys::unix::ext::process::CommandExt` (at time of writing).
+            // defined at `std::sys::pal::unix::ext::process::CommandExt` (at time of writing).
             //
-            // `std::os::unix` reexports the contents of `std::sys::unix::ext`. `std::sys` is
+            // `std::os::unix` reexports the contents of `std::sys::pal::unix::ext`. `std::sys` is
             // private so the "true" path to `CommandExt` isn't accessible.
             //
             // In this case, the `visible_parent_map` will look something like this:
             //
             // (child) -> (parent)
-            // `std::sys::unix::ext::process::CommandExt` -> `std::sys::unix::ext::process`
-            // `std::sys::unix::ext::process` -> `std::sys::unix::ext`
-            // `std::sys::unix::ext` -> `std::os`
+            // `std::sys::pal::unix::ext::process::CommandExt` -> `std::sys::pal::unix::ext::process`
+            // `std::sys::pal::unix::ext::process` -> `std::sys::pal::unix::ext`
+            // `std::sys::pal::unix::ext` -> `std::os`
             //
-            // This is correct, as the visible parent of `std::sys::unix::ext` is in fact
+            // This is correct, as the visible parent of `std::sys::pal::unix::ext` is in fact
             // `std::os`.
             //
             // When printing the path to `CommandExt` and looking at the `cur_def_key` that
-            // corresponds to `std::sys::unix::ext`, we would normally print `ext` and then go
+            // corresponds to `std::sys::pal::unix::ext`, we would normally print `ext` and then go
             // to the parent - resulting in a mangled path like
             // `std::os::ext::process::CommandExt`.
             //
             // Instead, we must detect that there was a re-export and instead print `unix`
-            // (which is the name `std::sys::unix::ext` was re-exported as in `std::os`). To
-            // do this, we compare the parent of `std::sys::unix::ext` (`std::sys::unix`) with
+            // (which is the name `std::sys::pal::unix::ext` was re-exported as in `std::os`). To
+            // do this, we compare the parent of `std::sys::pal::unix::ext` (`std::sys::pal::unix`) with
             // the visible parent (`std::os`). If these do not match, then we iterate over
             // the children of the visible parent (as was done when computing
             // `visible_parent_map`), looking for the specific child we currently have and then

library/std/src/sys/mod.rs

@@ -1,121 +1,8 @@
-//! Platform-dependent platform abstraction.
-//!
-//! The `std::sys` module is the abstracted interface through which
-//! `std` talks to the underlying operating system. It has different
-//! implementations for different operating system families, today
-//! just Unix and Windows, and initial support for Redox.
-//!
-//! The centralization of platform-specific code in this module is
-//! enforced by the "platform abstraction layer" tidy script in
-//! `tools/tidy/src/pal.rs`.
-//!
-//! This module is closely related to the platform-independent system
-//! integration code in `std::sys_common`. See that module's
-//! documentation for details.
-//!
-//! In the future it would be desirable for the independent
-//! implementations of this module to be extracted to their own crates
-//! that `std` can link to, thus enabling their implementation
-//! out-of-tree via crate replacement. Though due to the complex
-//! inter-dependencies within `std` that will be a challenging goal to
-//! achieve.
-
-#![allow(missing_debug_implementations)]
-
-pub mod common;
-mod personality;
-
-cfg_if::cfg_if! {
-    if #[cfg(unix)] {
-        mod unix;
-        pub use self::unix::*;
-    } else if #[cfg(windows)] {
-        mod windows;
-        pub use self::windows::*;
-    } else if #[cfg(target_os = "solid_asp3")] {
-        mod solid;
-        pub use self::solid::*;
-    } else if #[cfg(target_os = "hermit")] {
-        mod hermit;
-        pub use self::hermit::*;
-    } else if #[cfg(target_os = "wasi")] {
-        mod wasi;
-        pub use self::wasi::*;
-    } else if #[cfg(target_family = "wasm")] {
-        mod wasm;
-        pub use self::wasm::*;
-    } else if #[cfg(target_os = "xous")] {
-        mod xous;
-        pub use self::xous::*;
-    } else if #[cfg(target_os = "uefi")] {
-        mod uefi;
-        pub use self::uefi::*;
-    } else if #[cfg(all(target_vendor = "fortanix", target_env = "sgx"))] {
-        mod sgx;
-        pub use self::sgx::*;
-    } else {
-        mod unsupported;
-        pub use self::unsupported::*;
-    }
-}
-
-cfg_if::cfg_if! {
-    // Fuchsia components default to full backtrace.
-    if #[cfg(target_os = "fuchsia")] {
-        pub const FULL_BACKTRACE_DEFAULT: bool = true;
-    } else {
-        pub const FULL_BACKTRACE_DEFAULT: bool = false;
-    }
-}
-
-#[cfg(not(test))]
-cfg_if::cfg_if! {
-    if #[cfg(target_os = "android")] {
-        pub use self::android::log2f32;
-        pub use self::android::log2f64;
-    } else {
-        #[inline]
-        pub fn log2f32(n: f32) -> f32 {
-            unsafe { crate::intrinsics::log2f32(n) }
-        }
-
-        #[inline]
-        pub fn log2f64(n: f64) -> f64 {
-            unsafe { crate::intrinsics::log2f64(n) }
-        }
-    }
-}
-
-// Solaris/Illumos requires a wrapper around log, log2, and log10 functions
-// because of their non-standard behavior (e.g., log(-n) returns -Inf instead
-// of expected NaN).
-#[cfg(not(test))]
-#[cfg(any(target_os = "solaris", target_os = "illumos"))]
-#[inline]
-pub fn log_wrapper<F: Fn(f64) -> f64>(n: f64, log_fn: F) -> f64 {
-    if n.is_finite() {
-        if n > 0.0 {
-            log_fn(n)
-        } else if n == 0.0 {
-            f64::NEG_INFINITY // log(0) = -Inf
-        } else {
-            f64::NAN // log(-n) = NaN
-        }
-    } else if n.is_nan() {
-        n // log(NaN) = NaN
-    } else if n > 0.0 {
-        n // log(Inf) = Inf
-    } else {
-        f64::NAN // log(-Inf) = NaN
-    }
-}
-
-#[cfg(not(test))]
-#[cfg(not(any(target_os = "solaris", target_os = "illumos")))]
-#[inline]
-pub fn log_wrapper<F: Fn(f64) -> f64>(n: f64, log_fn: F) -> f64 {
-    log_fn(n)
-}
-
-#[cfg(not(target_os = "uefi"))]
-pub type RawOsError = i32;
+/// The PAL (platform abstraction layer) contains platform-specific abstractions
+/// for implementing the features in the other submodules module, e.g. UNIX file
+/// descriptors.
+mod pal;
+
+// FIXME(117276): remove this, move feature implementations into individual
+//                submodules.
+pub use pal::*;

library/std/src/sys/hermit/alloc.rs → library/std/src/sys/pal/hermit/alloc.rs

@@ -1,6 +1,6 @@
 use crate::alloc::{GlobalAlloc, Layout, System};
 use crate::ptr;
-use crate::sys::hermit::abi;
+use crate::sys::pal::hermit::abi;
 
 #[stable(feature = "alloc_system_type", since = "1.28.0")]
 unsafe impl GlobalAlloc for System {

library/std/src/sys/hermit/fd.rs → library/std/src/sys/pal/hermit/fd.rs

@@ -3,8 +3,8 @@
 use crate::io::{self, Read};
 use crate::os::hermit::io::{FromRawFd, OwnedFd, RawFd};
 use crate::sys::cvt;
-use crate::sys::hermit::abi;
-use crate::sys::unsupported;
+use crate::sys::pal::hermit::abi;
+use crate::sys::pal::unsupported;
 use crate::sys_common::{AsInner, FromInner, IntoInner};
 
 use crate::os::hermit::io::*;

library/std/src/sys/hermit/fs.rs → library/std/src/sys/pal/hermit/fs.rs

@@ -7,12 +7,12 @@ use crate::os::hermit::io::{AsFd, AsRawFd, BorrowedFd, FromRawFd, IntoRawFd, Raw
 use crate::path::{Path, PathBuf};
 use crate::sys::common::small_c_string::run_path_with_cstr;
 use crate::sys::cvt;
-use crate::sys::hermit::abi::{
+use crate::sys::pal::hermit::abi::{
     self, O_APPEND, O_CREAT, O_EXCL, O_RDONLY, O_RDWR, O_TRUNC, O_WRONLY,
 };
-use crate::sys::hermit::fd::FileDesc;
+use crate::sys::pal::hermit::fd::FileDesc;
+use crate::sys::pal::unsupported;
 use crate::sys::time::SystemTime;
-use crate::sys::unsupported;
 use crate::sys_common::{AsInner, AsInnerMut, FromInner, IntoInner};
 
 pub use crate::sys_common::fs::{copy, try_exists};

library/std/src/sys/hermit/mod.rs → library/std/src/sys/pal/hermit/mod.rs

@@ -115,7 +115,7 @@ pub unsafe extern "C" fn runtime_entry(
     argv: *const *const c_char,
     env: *const *const c_char,
 ) -> ! {
-    use crate::sys::hermit::thread_local_dtor::run_dtors;
+    use crate::sys::pal::hermit::thread_local_dtor::run_dtors;
     extern "C" {
         fn main(argc: isize, argv: *const *const c_char) -> i32;
     }

library/std/src/sys/hermit/net.rs → library/std/src/sys/pal/hermit/net.rs

@@ -5,7 +5,7 @@ use crate::io::{self, BorrowedBuf, BorrowedCursor, IoSlice, IoSliceMut};
 use crate::mem;
 use crate::net::{Shutdown, SocketAddr};
 use crate::os::hermit::io::{AsFd, AsRawFd, BorrowedFd, FromRawFd, RawFd};
-use crate::sys::hermit::fd::FileDesc;
+use crate::sys::pal::hermit::fd::FileDesc;
 use crate::sys::time::Instant;
 use crate::sys_common::net::{getsockopt, setsockopt, sockaddr_to_addr};
 use crate::sys_common::{AsInner, FromInner, IntoInner};

library/std/src/sys/hermit/os.rs → library/std/src/sys/pal/hermit/os.rs

@@ -8,9 +8,9 @@ use crate::os::hermit::ffi::OsStringExt;
 use crate::path::{self, PathBuf};
 use crate::str;
 use crate::sync::Mutex;
-use crate::sys::hermit::abi;
 use crate::sys::memchr;
-use crate::sys::unsupported;
+use crate::sys::pal::hermit::abi;
+use crate::sys::pal::unsupported;
 use crate::vec;
 
 pub fn errno() -> i32 {

library/std/src/sys/hermit/stdio.rs → library/std/src/sys/pal/hermit/stdio.rs

@@ -1,6 +1,6 @@
 use crate::io;
 use crate::io::{IoSlice, IoSliceMut};
-use crate::sys::hermit::abi;
+use crate::sys::pal::hermit::abi;
 
 pub struct Stdin;
 pub struct Stdout;

library/std/src/sys/hermit/thread.rs → library/std/src/sys/pal/hermit/thread.rs

@@ -5,8 +5,8 @@ use crate::io;
 use crate::mem;
 use crate::num::NonZeroUsize;
 use crate::ptr;
-use crate::sys::hermit::abi;
-use crate::sys::hermit::thread_local_dtor::run_dtors;
+use crate::sys::pal::hermit::abi;
+use crate::sys::pal::hermit::thread_local_dtor::run_dtors;
 use crate::time::Duration;
 
 pub type Tid = abi::Tid;

library/std/src/sys/hermit/time.rs → library/std/src/sys/pal/hermit/time.rs

@@ -2,9 +2,9 @@
 
 use crate::cmp::Ordering;
 use crate::ops::{Add, AddAssign, Sub, SubAssign};
-use crate::sys::hermit::abi;
-use crate::sys::hermit::abi::timespec;
-use crate::sys::hermit::abi::{CLOCK_MONOTONIC, CLOCK_REALTIME, NSEC_PER_SEC};
+use crate::sys::pal::hermit::abi;
+use crate::sys::pal::hermit::abi::timespec;
+use crate::sys::pal::hermit::abi::{CLOCK_MONOTONIC, CLOCK_REALTIME, NSEC_PER_SEC};
 use crate::time::Duration;
 use core::hash::{Hash, Hasher};
 

library/std/src/sys/pal/mod.rs

@@ -0,0 +1,121 @@
+//! Platform-dependent platform abstraction.
+//!
+//! The `std::sys` module is the abstracted interface through which
+//! `std` talks to the underlying operating system. It has different
+//! implementations for different operating system families, today
+//! just Unix and Windows, and initial support for Redox.
+//!
+//! The centralization of platform-specific code in this module is
+//! enforced by the "platform abstraction layer" tidy script in
+//! `tools/tidy/src/pal.rs`.
+//!
+//! This module is closely related to the platform-independent system
+//! integration code in `std::sys_common`. See that module's
+//! documentation for details.
+//!
+//! In the future it would be desirable for the independent
+//! implementations of this module to be extracted to their own crates
+//! that `std` can link to, thus enabling their implementation
+//! out-of-tree via crate replacement. Though due to the complex
+//! inter-dependencies within `std` that will be a challenging goal to
+//! achieve.
+
+#![allow(missing_debug_implementations)]
+
+pub mod common;
+mod personality;
+
+cfg_if::cfg_if! {
+    if #[cfg(unix)] {
+        mod unix;
+        pub use self::unix::*;
+    } else if #[cfg(windows)] {
+        mod windows;
+        pub use self::windows::*;
+    } else if #[cfg(target_os = "solid_asp3")] {
+        mod solid;
+        pub use self::solid::*;
+    } else if #[cfg(target_os = "hermit")] {
+        mod hermit;
+        pub use self::hermit::*;
+    } else if #[cfg(target_os = "wasi")] {
+        mod wasi;
+        pub use self::wasi::*;
+    } else if #[cfg(target_family = "wasm")] {
+        mod wasm;
+        pub use self::wasm::*;
+    } else if #[cfg(target_os = "xous")] {
+        mod xous;
+        pub use self::xous::*;
+    } else if #[cfg(target_os = "uefi")] {
+        mod uefi;
+        pub use self::uefi::*;
+    } else if #[cfg(all(target_vendor = "fortanix", target_env = "sgx"))] {
+        mod sgx;
+        pub use self::sgx::*;
+    } else {
+        mod unsupported;
+        pub use self::unsupported::*;
+    }
+}
+
+cfg_if::cfg_if! {
+    // Fuchsia components default to full backtrace.
+    if #[cfg(target_os = "fuchsia")] {
+        pub const FULL_BACKTRACE_DEFAULT: bool = true;
+    } else {
+        pub const FULL_BACKTRACE_DEFAULT: bool = false;
+    }
+}
+
+#[cfg(not(test))]
+cfg_if::cfg_if! {
+    if #[cfg(target_os = "android")] {
+        pub use self::android::log2f32;
+        pub use self::android::log2f64;
+    } else {
+        #[inline]
+        pub fn log2f32(n: f32) -> f32 {
+            unsafe { crate::intrinsics::log2f32(n) }
+        }
+
+        #[inline]
+        pub fn log2f64(n: f64) -> f64 {
+            unsafe { crate::intrinsics::log2f64(n) }
+        }
+    }
+}
+
+// Solaris/Illumos requires a wrapper around log, log2, and log10 functions
+// because of their non-standard behavior (e.g., log(-n) returns -Inf instead
+// of expected NaN).
+#[cfg(not(test))]
+#[cfg(any(target_os = "solaris", target_os = "illumos"))]
+#[inline]
+pub fn log_wrapper<F: Fn(f64) -> f64>(n: f64, log_fn: F) -> f64 {
+    if n.is_finite() {
+        if n > 0.0 {
+            log_fn(n)
+        } else if n == 0.0 {
+            f64::NEG_INFINITY // log(0) = -Inf
+        } else {
+            f64::NAN // log(-n) = NaN
+        }
+    } else if n.is_nan() {
+        n // log(NaN) = NaN
+    } else if n > 0.0 {
+        n // log(Inf) = Inf
+    } else {
+        f64::NAN // log(-Inf) = NaN
+    }
+}
+
+#[cfg(not(test))]
+#[cfg(not(any(target_os = "solaris", target_os = "illumos")))]
+#[inline]
+pub fn log_wrapper<F: Fn(f64) -> f64>(n: f64, log_fn: F) -> f64 {
+    log_fn(n)
+}
+
+#[cfg(not(target_os = "uefi"))]
+pub type RawOsError = i32;

library/std/src/sys/sgx/alloc.rs → library/std/src/sys/pal/sgx/alloc.rs

@@ -1,6 +1,6 @@
 use crate::alloc::{GlobalAlloc, Layout, System};
 use crate::ptr;
-use crate::sys::sgx::abi::mem as sgx_mem;
+use crate::sys::pal::sgx::abi::mem as sgx_mem;
 use core::sync::atomic::{AtomicBool, Ordering};
 
 use super::waitqueue::SpinMutex;