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Remove `SOCK_CLOEXEC` dummy variable on platforms that don't use it.
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Fix up Command Debug output when arg0 is specified.
PR https://github.com/rust-lang/rust/pull/66512 added the ability to set argv[0] on
Command. As a side effect, it changed the Debug output to print both the program and
argv[0], which in practice results in stuttery output (`"echo" "echo" "foo"`).
This PR reverts the behaviour to the the old one, so that the command is only printed
once - unless arg0 has been set. In that case it emits `"[command]" "arg0" "arg1" ...`.
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PR https://github.com/rust-lang/rust/pull/66512 added the ability to set argv[0] on
Command. As a side effect, it changed the Debug output to print both the program and
argv[0], which in practice results in stuttery output ("echo echo foo").
This PR reverts the behaviour to the the old one, so that the command is only printed
once - unless arg0 has been set. In that case it emits "[command] arg0 arg1 ...".
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Fix signature of `__wasilibc_find_relpath`
Looks like this function changed upstream, so it needs to be adjusted
for when used by libstd.
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SGX: Change ELF entrypoint
This fixes [rust-sgx issue #148](https://github.com/fortanix/rust-sgx/issues/148).
A new entry point is created for the ELF file generated by `rustc`, separate from the enclave entry point. When the ELF file is executed as a Linux binary, the error message below is written to stderr.
> Error: This file is an SGX enclave which cannot be executed as a standard Linux binary.
> See the installation guide at https://edp.fortanix.com/docs/installation/guide/ on how to use 'cargo run' or follow the steps at https://edp.fortanix.com/docs/tasks/deployment/ for manual deployment.
When the ELF file is converted to an SGXS using `elf2sgxs`, the old entry point is still set as the enclave entry point. In a future pull request in the rust-sgx repository, `elf2sgxs` will be modified to remove the code in the ELF entry point, since this code is not needed in the enclave.
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Looks like this function changed upstream, so it needs to be adjusted
for when used by libstd.
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syscall itself
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Rollup of 10 pull requests
Successful merges:
- #66649 (VxWorks: fix issues in accessing environment variables)
- #66764 (Tweak wording of `collect()` on bad target type)
- #66900 (Clean up error codes)
- #66974 ([CI] fix the `! isCI` check in src/ci/run.sh)
- #66979 (Add long error for E0631 and update ui tests.)
- #67017 (cleanup long error explanations)
- #67021 (Fix docs for formatting delegations)
- #67041 (add ExitStatusExt into prelude)
- #67065 (Fix fetching arguments on the wasm32-wasi target)
- #67066 (Update the revision of wasi-libc used in wasm32-wasi)
Failed merges:
r? @ghost
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Fix fetching arguments on the wasm32-wasi target
Fixes an error introduced in #66750 where wasi executables always think
they have zero arguments because one of the vectors returned here
accidentally thought it was length 0.
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add ExitStatusExt into prelude
r? @alexcrichton
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VxWorks: fix issues in accessing environment variables
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std:win: avoid WSA_FLAG_NO_INHERIT flag and don't use SetHandleInformation on UWP
This flag is not supported on Windows 7 before SP1, and on windows server 2008 SP2. This breaks Socket creation & duplication.
This was fixed in a previous PR. cc #26658
This PR: cc #60260 reuses this flag to support UWP, and makes an attempt to handle the potential error.
This version still fails to create a socket, as the error returned by WSA on this case is WSAEINVAL (invalid argument). and not WSAEPROTOTYPE.
MSDN page for WSASocketW (that states the platform support for WSA_FLAG_NO_HANDLE_INHERIT): https://docs.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-wsasocketw
CC #26543
CC #26518
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Fixes an error introduced in #66750 where wasi executables always think
they have zero arguments because one of the vectors returned here
accidentally thought it was length 0.
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entry point
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This commit updates the `wasi` crate used by the standard library which
is used to implement most of the functionality of libstd on the
`wasm32-wasi` target. This update comes with a brand new crate structure
in the `wasi` crate which caused quite a few changes for the wasi target
here, but it also comes with a significant change to where the
functionality is coming from.
The WASI specification is organized into "snapshots" and a new snapshot
happened recently, so the WASI APIs themselves have changed since the
previous revision. This had only minor impact on the public facing
surface area of libstd, only changing on `u32` to a `u64` in an unstable
API. The actual source for all of these types and such, however, is now
coming from the `wasi_preview_snapshot1` module instead of the
`wasi_unstable` module like before. This means that any implementors
generating binaries will need to ensure that their embedding environment
handles the `wasi_preview_snapshot1` module.
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Replace .unwrap() with ? in std::os::unix::net
As people like to copy examples, this gives them good habits.
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Atomic as_mut_ptr
I encountered the following pattern a few times: In Rust we use some atomic type like `AtomicI32`, and an FFI interface exposes this as `*mut i32` (or some similar `libc` type).
It was not obvious to me if a just transmuting a pointer to the atomic was acceptable, or if this should use a cast that goes through an `UnsafeCell`. See https://github.com/rust-lang/rust/issues/66136#issuecomment-557802477
Transmuting the pointer directly:
```rust
let atomic = AtomicI32::new(1);
let ptr = &atomic as *const AtomicI32 as *mut i32;
unsafe {
ffi(ptr);
}
```
A dance with `UnsafeCell`:
```rust
let atomic = AtomicI32::new(1);
unsafe {
let ptr = (&*(&atomic as *const AtomicI32 as *const UnsafeCell<i32>)).get();
ffi(ptr);
}
```
Maybe in the end both ways could be valid. But why not expose a direct method to get a pointer from the standard library?
An `as_mut_ptr` method on atomics can be safe, because only the use of the resulting pointer is where things can get unsafe. I documented its use for FFI, and "Doing non-atomic reads and writes on the resulting integer can be a data race."
The standard library could make use this method in a few places in the WASM module.
cc @RalfJung as you answered my original question.
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Rollup of 4 pull requests
Successful merges:
- #66818 (Format libstd/os with rustfmt)
- #66819 (Format libstd/sys with rustfmt)
- #66820 (Format libstd with rustfmt)
- #66847 (Allow any identifier as format arg name)
Failed merges:
r? @ghost
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This commit applies rustfmt with rust-lang/rust's default settings to
files in src/libstd/sys *that are not involved in any currently open PR*
to minimize merge conflicts. THe list of files involved in open PRs was
determined by querying GitHub's GraphQL API with this script:
https://gist.github.com/dtolnay/aa9c34993dc051a4f344d1b10e4487e8
With the list of files from the script in outstanding_files, the
relevant commands were:
$ find src/libstd/sys -name '*.rs' \
| xargs rustfmt --edition=2018 --unstable-features --skip-children
$ rg libstd/sys outstanding_files | xargs git checkout --
Repeating this process several months apart should get us coverage of
most of the rest of the files.
To confirm no funny business:
$ git checkout $THIS_COMMIT^
$ git show --pretty= --name-only $THIS_COMMIT \
| xargs rustfmt --edition=2018 --unstable-features --skip-children
$ git diff $THIS_COMMIT # there should be no difference
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Fallback to .init_array when no arguments are available on glibc Linux
Linux is one of the only platforms where `std::env::args` doesn't work in a cdylib.
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Add unix::process::CommandExt::arg0
This allows argv[0] to be overridden on the executable's command-line. This also makes the program
executed independent of argv[0].
Does Fuchsia have the same semantics? I'm assuming so.
Addresses: #66510
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I'm not entirely sure *why*, but this fixed a problem I was having.
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remove HermitCore leftovers from sys/unix
HermitCore support is already moved to the directory "sys/hermit". => remove leftovers
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This allows argv[0] to be overridden on the executable's command-line. This also makes the program
executed independent of argv[0].
Does Fuchsia have the same semantics?
Addresses: #66510
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protect creation of destructors by a mutex
- add on HermitCore an additional lock to protect static data
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Revert #65134
To stop giving people on nightly reasons to `allow(improper_ctypes)` while tweaks to the lint are being prepared.
cc #66220
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davidtwco:issue-19834-improper-ctypes-in-extern-C-fn, r=rkruppe"
This reverts commit 3f0e16473de5ec010f44290a8c3ea1d90e0ad7a2, reversing
changes made to 61a551b4939ec1d5596e585351038b8fbd0124ba.
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