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2021-04-30Auto merge of #84716 - joshtriplett:chroot, r=dtolnaybors-0/+33
Add std::os::unix::fs::chroot to change the root directory of the current process This is a straightforward wrapper that uses the existing helpers for C string handling and errno handling. Having this available is convenient for UNIX utility programs written in Rust, and avoids having to call the unsafe `libc::chroot` directly and handle errors manually, in a program that may otherwise be entirely safe code.
2021-04-30Auto merge of #84522 - CDirkx:cmath, r=yaahcbors-118/+34
Reuse `sys::unix::cmath` on other platforms Reuse `sys::unix::cmath` on all non-`windows` platforms. `unix` is chosen as the canonical location instead of `unsupported` or `common` because `unsupported` doesn't make sense semantically and `common` is reserved for code that is supported on all platforms. Also `unix` is already the home of some non-`windows` code that is technically not exclusive to `unix` like `unix::path`.
2021-04-30Add std::os::unix::fs::chroot to change the root directory of the current ↵Josh Triplett-0/+33
process This is a straightforward wrapper that uses the existing helpers for C string handling and errno handling. Having this available is convenient for UNIX utility programs written in Rust, and avoids having to call the unsafe `libc::chroot` directly and handle errors manually, in a program that may otherwise be entirely safe code.
2021-04-29Simplify chdir implementation and minimize unsafe blockJosh Triplett-5/+3
2021-04-28Remove `DropGuard` in `sys::windows::process` and use `StaticMutex` insteadChristiaan Dirkx-24/+4
2021-04-28Fix missing import in `unsupported::args`Christiaan Dirkx-0/+1
2021-04-28Reuse `unsupported::args` on `wasm`Christiaan Dirkx-42/+1
2021-04-28Move `wasm` atomics code to `wasm/atomics`Christiaan Dirkx-5/+5
2021-04-28Rework `wasm::thread` to `thread_atomics`Christiaan Dirkx-19/+8
2021-04-28Reuse `unix::cmath`Christiaan Dirkx-118/+34
2021-04-27Update library/std/src/sys/unix/thread.rsAlik Aslanyan-1/+1
Co-authored-by: Joshua Nelson <joshua@yottadb.com>
2021-04-27Rollup merge of #84521 - CDirkx:hermit-dedup, r=Mark-SimulacrumDylan DPC-92/+3
Reuse modules on `hermit` Reuse the following modules on `hermit`: - `unix::path` (contents identical) - `unsupported::io` (contents identical) - `unsupported::thread_local_key` (contents functionally identical, only changes are the panic error messages) `@rustbot` label: +T-libs-impl
2021-04-26Implement setting thread name for FuchsiaAlik Aslanyan-4/+30
2021-04-25Rollup merge of #84541 - KaiJewson:inline-raw, r=m-ou-seDylan DPC-0/+76
Inline most raw socket, fd and handle conversions Now that file descriptor types on Unix have niches, it is advantageous for user libraries which provide file descriptor wrappers (e.g. `Socket` from socket2) to store a `File` internally instead of a `RawFd`, so that the niche can be taken advantage of. However, doing so will currently result in worse performance as `IntoRawFd`, `FromRawFd` and `AsRawFd` are not inlined. This change adds `#[inline]` to those methods on std types that wrap file descriptors, handles or sockets.
2021-04-25Inline most raw socket, fd and handle conversionsKaiJewson-0/+76
2021-04-25Auto merge of #84115 - CDirkx:rt, r=m-ou-sebors-89/+81
Rework `init` and `cleanup` This PR reworks the code in `std` that runs before and after `main` and centralizes this code respectively in the functions `init` and `cleanup` in both `sys_common` and `sys`. This makes is easy to see what code is executed during initialization and cleanup on each platform just by looking at e.g. `sys::windows::init`. Full list of changes: - new module `rt` in `sys_common` to contain `init` and `cleanup` and the runtime macros. - `at_exit` and the mechanism to register exit handlers has been completely removed. In practice this was only used for closing sockets on windows and flushing stdout, which have been moved to `cleanup`. - <s>On windows `alloc` and `net` initialization is now done in `init`, this saves a runtime check in every allocation and network use.</s>
2021-04-24Reuse `unix::path` and `unsupported::{io, thread_local_key}` on `hermit`Christiaan Dirkx-92/+3
2021-04-23Explicitly implement `!Send` and `!Sync` for `sys::{Args, Env}`Christiaan Dirkx-27/+30
2021-04-22Rollup merge of #84413 - CDirkx:args_inner_debug, r=m-ou-seDylan DPC-30/+25
Remove `sys::args::Args::inner_debug` and use `Debug` instead This removes the method `sys::args::Args::inner_debug` on all platforms and implements `Debug` for `Args` instead. I believe this creates a more natural API for the different platforms under `sys`: export a type `Args: Debug + Iterator + ...` vs. `Args: Iterator + ...` and with a method `inner_debug`.
2021-04-22Rollup merge of #84402 - CDirkx:rwlock, r=dtolnayDylan DPC-1/+53
Move `sys_common::rwlock::StaticRWLock` etc. to `sys::unix::rwlock` This moves `sys_common::rwlock::StaticRwLock`, `RWLockReadGuard` and `RWLockWriteGuard` to `sys::unix::rwlock`. They are already `#[cfg(unix)]` and don't need to be in `sys_common`.
2021-04-22Document that `init` and `cleanup` are not guaranteed to runChristiaan Dirkx-0/+10
2021-04-22Apply suggestions from reviewChristiaan Dirkx-7/+10
2021-04-22Move most init to `sys::init`Christiaan Dirkx-51/+30
2021-04-22Remove `sys::args::Args::inner_debug` and use `Debug` insteadChristiaan Dirkx-30/+25
2021-04-22Move all cleanup to `sys::cleanup`Christiaan Dirkx-22/+7
2021-04-22Rework `at_exit` to `cleanup`Christiaan Dirkx-21/+36
2021-04-21Ensure TLS destructors run before thread joins in SGXMohsen Zohrevandi-10/+65
2021-04-21Rollup merge of #84212 - CDirkx:void, r=m-ou-seMara Bos-252/+238
Replace `Void` in `sys` with never type This PR replaces several occurrences in `sys` of the type `enum Void {}` with the Rust never type (`!`). The name `Void` is unfortunate because in other languages (C etc.) it refers to a unit type, not an uninhabited type. Note that the previous stabilization of the never type was reverted, however all uses here are implementation details and not publicly visible.
2021-04-21Move `sys_common::rwlock::StaticRWLock` etc. to `sys::unix::rwlock`Christiaan Dirkx-1/+53
2021-04-21Apply suggestions from code reviewChristiaan Dirkx-2/+4
2021-04-20Change uses of never typeChristiaan Dirkx-196/+198
2021-04-20Replace `Void` with never typeChristiaan Dirkx-60/+44
2021-04-19Fix `vxworks` compilation errorsChristiaan Dirkx-10/+23
2021-04-19Move `sys::vxworks` code to `sys::unix`Christiaan Dirkx-213/+64
2021-04-18Rename `NotSupported` to `Unsupported`Christiaan Dirkx-14/+23
2021-04-18Use `NotSupported` in more placesChristiaan Dirkx-47/+48
2021-04-18Update `decode_error_kind` to decode os errors to `NotSupported`Christiaan Dirkx-0/+4
2021-04-18Add and insta-stabilize `std::io::ErrorKind::NotSupported`Christiaan Dirkx-6/+6
2021-04-15Rollup merge of #84177 - ehuss:join_paths-err, r=kennytmDylan DPC-1/+1
Fix join_paths error display. On unix, the error from `join_paths` looked like this: ``` path segment contains separator `58` ``` This PR changes it to look like this: ``` path segment contains separator `:` ```
2021-04-14Update documentationChristiaan Dirkx-2/+12
2021-04-14Move `std::sys_common::alloc` to `std::sys::common`Christiaan Dirkx-2/+53
2021-04-13Fix join_paths error display.Eric Huss-1/+1
2021-04-02Rollup merge of #83771 - asomers:stack_overflow_freebsd, r=dtolnayDylan DPC-7/+16
Fix stack overflow detection on FreeBSD 11.1+ Beginning with FreeBSD 10.4 and 11.1, there is one guard page by default. And the stack autoresizes, so if Rust allocates its own guard page, then FreeBSD's will simply move up one page. The best solution is to just use the OS's guard page.
2021-04-02Rollup merge of #83065 - CDirkx:win-alloc, r=dtolnayDylan DPC-33/+220
Rework `std::sys::windows::alloc` I came across https://github.com/rust-lang/rust/pull/76676#discussion_r488729990, which points out that there was unsound code in the Windows alloc code, creating a &mut to possibly uninitialized memory. I reworked the code so that that particular issue does not occur anymore, and started adding more documentation and safety comments. Full list of changes: - moved and documented the relevant Windows Heap API functions - refactor `allocate_with_flags` to `allocate` (and remove the other helper functions), which now takes just a `bool` if the memory should be zeroed - add checks for if `GetProcessHeap` returned null - add a test that checks if the size and alignment of a `Header` are indeed <= `MIN_ALIGN` - add `#![deny(unsafe_op_in_unsafe_fn)]` and the necessary unsafe blocks with safety comments I feel like I may have overdone the documenting, the unsoundness fix is the most important part; I could spit this PR up in separate parts.
2021-04-02Remove `debug_assert`Christiaan Dirkx-4/+1
2021-04-02Introduce `get_process_heap` and fix atomic ordering.Christiaan Dirkx-13/+22
2021-04-01Fix stack overflow detection on FreeBSD 11.1+Alan Somers-7/+16
Beginning with FreeBSD 10.4 and 11.1, there is one guard page by default. And the stack autoresizes, so if Rust allocates its own guard page, then FreeBSD's will simply move up one page. The best solution is to just use the OS's guard page.
2021-03-30Auto merge of #83170 - joshtriplett:spawn-cleanup, r=kennytmbors-33/+27
Simplify Command::spawn (no semantic change) This minimizes the size of an unsafe block, and allows outdenting some complex code.
2021-03-30Rollup merge of #83374 - reyk:fix/bsd-ancillary, r=joshtriplettDylan DPC-23/+34
unix: Fix feature(unix_socket_ancillary_data) on macos and other BSDs This adds support for CMSG handling on macOS and fixes it on OpenBSD and possibly other BSDs. When traversing the CMSG list, the previous code had an exception for Android where the next element after the last pointer could point to the first pointer instead of NULL. This is actually not specific to Android: the `libc::CMSG_NXTHDR` implementation for Linux and emscripten have a special case to return NULL when the length of the previous element is zero; most other implementations simply return the previous element plus a zero offset in this case. This MR makes the check non-optional which fixes CMSG handling and a possible endless loop on such systems; tested with file descriptor passing on OpenBSD, Linux, and macOS. This MR additionally adds `SocketAncillary::is_empty` because clippy is right that it should be added. This belongs to the `feature(unix_socket_ancillary_data)` tracking issue: https://github.com/rust-lang/rust/issues/76915 r? `@joshtriplett`
2021-03-29Simplify Command::spawn (no semantic change)Josh Triplett-33/+27
This minimizes the size of an unsafe block, and allows outdenting some complex code.
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