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Add a lint to catch clashing `extern` fn declarations.
Closes #69390.
Adds lint `clashing_extern_decl` to detect when, within a single crate, an extern function of the same name is declared with different types. Because two symbols of the same name cannot be resolved to two different functions at link time, and one function cannot possibly have two types, a clashing extern declaration is almost certainly a mistake.
This lint does not run between crates because a project may have dependencies which both rely on the same extern function, but declare it in a different (but valid) way. For example, they may both declare an opaque type for one or more of the arguments (which would end up distinct types), or use types that are valid conversions in the language the extern fn is defined in. In these cases, we can't say that the clashing declaration is incorrect.
r? @eddyb
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Prevent attacker from manipulating FPU tag word used in SGX enclave
Insufficient sanitization of the x87 FPU tag word in the trusted enclave runtime allowed unprivileged adversaries in the containing host application to induce incoherent or unexpected results for ABI-compliant compiled enclave application code that uses the x87 FPU.
Vulnerability was disclosed to us by Fritz Alder, Jo Van Bulck, David Oswald and Frank Piessens
cc: @jethrogb
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RISC-V Emulated Testing
Adds a disabled docker image on which to run RISC-V tests. Based on the armhf image.
Test using
```
./src/ci/docker/run.sh riscv64gc-linux
```
cc: @msizanoen1
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This lint checks that all declarations for extern fns of the same name
are declared with the same types.
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Update the doc for std::prelude to the correct behavior
Fixes #64686.
One line change to ensure the docs are correct about the behavior of the compiler when inserting`std::prelude::v1`.
I don't think examples are necessary but I can add some (especially those from the original issue) if needed.
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Document format correction
Minor amendments to the document.
r? @steveklabnik
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Ensure std benchmarks get tested.
This ensures that the std benchmarks don't break in the future. Currently they aren't compiled or tested on CI, so they can easily bitrot. Testing a benchmark runs it with one iteration. Adding these should only add a few seconds to CI.
Closes #54176
Closes #61913
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Fix asinh of negative values
Rust's current implementation of asinh has [large errors](https://www.wolframalpha.com/input/?i=arcsinh%28x%29%2C+ln%28x%2B%28x%5E2%2B1%29%5E0.5%29%2C+x+from+-67452095.07139316+to+0) in its negative range. ~These are (mostly) not numerical, but rather seem due to an incorrect implementation.~ This appears to be due to avoidable catastrophic cancellation.
[Playground before/after](https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=bd04ae6d86d06612e4e389a8b95d19ab).
[glibc uses](https://github.com/bminor/glibc/blob/81dca813cc35f91414731fdd0ff6b756d5e1827f/sysdeps/ieee754/dbl-64/s_asinh.c#L56) abs here.
Many thanks to @danieldeankon for finding this weird behavior, @jebrosen for diagnosing it, and @toasteater for identifying the probable implementation error!
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Complete the std::time documentation to warn about the inconsistencies between OS
Fixes #48980.
I put the new documentation in `src/libstd/time.rs` at the module-level because it affects all types, even the one that are not directly system dependents if they are used with affected types, but there may be a better place for it.
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add raw_ref macros
In https://github.com/rust-lang/rust/issues/64490, various people were in favor of exposing `&raw` as a macro first before making the actual syntax stable. So this PR (unstably) introduces those macros.
I'll create the tracking issue if we're okay moving forward with this.
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Insufficient sanitization of the x87 FPU tag word in the trusted enclave runtime allowed unprivileged adversaries in the containing host application to induce incoherent or unexpected results for ABI-compliant compiled enclave application code that uses the x87 FPU.
Vulnerability was disclosed to us by Fritz Alder, Jo Van Bulck, David Oswald and Frank Piessens
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Use `Ipv4Addr::from<[u8; 4]>` when possible
Resolve this comment: https://github.com/rust-lang/rust/pull/73331#discussion_r440098369
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Use track caller for bug! macro
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between OS
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extend network support for HermitCore
- add basic support of TcpListerner for HermitCore
- revise TcpStream to support peer_addr
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Revert heterogeneous SocketAddr PartialEq impls
Originally added in #72239.
These lead to inference regressions (mostly in tests) in code that looks like:
```rust
let socket = SocketAddrV4::new(Ipv4Addr::new(127, 0, 0, 1), 8080);
assert_eq!(socket, "127.0.0.1:8080".parse().unwrap());
```
That compiles as of stable 1.44.0 but fails in beta with:
```console
error[E0284]: type annotations needed
--> src/main.rs:3:41
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3 | assert_eq!(socket, "127.0.0.1:8080".parse().unwrap());
| ^^^^^ cannot infer type for type parameter `F` declared on the associated function `parse`
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= note: cannot satisfy `<_ as std::str::FromStr>::Err == _`
help: consider specifying the type argument in the method call
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3 | assert_eq!(socket, "127.0.0.1:8080".parse::<F>().unwrap());
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```
Closes #73242.
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Add methods to go from a nul-terminated Vec<u8> to a CString
Fixes #73100.
Doc tests have been written and the documentation on the error type
updated too.
I used `#[stable(feature = "cstring_from_vec_with_nul", since = "1.46.0")]` but I don't know if the version is correct.
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Example about explicit mutex dropping
Fixes #67457.
Following the remarks made in #73074, I added an example on the main `Mutex` type, with a situation where there is mutable data and a computation result.
In my testing it is effectively needed to explicitly drop the lock, else it deadlocks.
r? @dtolnay because you were the one to review the previous PR.
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This reverts commit d221ffc68e543f4a38efcc2bd34f52145f89003b.
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This reverts commit 9d596b50f15dfff47fa2272ee63cdc9aeb9307fa.
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Add basic support of TcpListerner for HermitCore.
In addition, revise TcpStream to support peer_addr.
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Based on the review made by dtolnay.
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Co-authored-by: David Tolnay <dtolnay@gmail.com>
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These lead to inference regressions (mostly in tests) in code that looks
like:
let socket = std::net::SocketAddrV4::new(std::net::Ipv4Addr::new(127, 0, 0, 1), 8080);
assert_eq!(socket, "127.0.0.1:8080".parse().unwrap());
That compiles as of stable 1.44.0 but fails in beta with:
error[E0284]: type annotations needed
--> src/main.rs:3:41
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3 | assert_eq!(socket, "127.0.0.1:8080".parse().unwrap());
| ^^^^^ cannot infer type for type parameter `F` declared on the associated function `parse`
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= note: cannot satisfy `<_ as std::str::FromStr>::Err == _`
help: consider specifying the type argument in the method call
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3 | assert_eq!(socket, "127.0.0.1:8080".parse::<F>().unwrap());
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