Rollup of 9 pull requests #93202
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Rollup of 9 pull requests #93202
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allowed to trigger unwinding.
aborting immediately. The panic handler is called with a special flag which forces it to abort after calling the panic hook.
I have found this code very confusing at times. This commit clarifies things. In particular, the commit explains the requirements that the `Borrow` impls put on the `Eq` and `Hash` impls, which are non-obvious. And it puts the `Borrow` impls first, since they force `Eq` and `Hash` to have particular forms. The commit also notes `TyS`'s uniqueness requirements.
- Fix style errors.
- L4-bender does not yet support dynamic linking.
- Stack unwinding is not yet supported for x86_64-unknown-l4re-uclibc.
For now, just abort on panics.
- Use GNU-style linker options where possible. As suggested by review:
- Use standard GNU-style ld syntax for relro flags.
- Use standard GNU-style optimization flags and logic.
- Use standard GNU-style ld syntax for --subsystem.
- Don't read environment variables in L4Bender linker. Thanks to
CARGO_ENCODED_RUSTFLAGS introduced in rust-lang#9601, l4-bender's arguments can
now be passed from the L4Re build system without resorting to custom
parsing of environment variables.
Transition unsupported naked functions future incompatibility lint into an error: * Naked functions must contain a single inline assembly block. Introduced as future incompatibility lint in 1.50 rust-lang#79653. Change into an error fixes a soundness issue described in rust-lang#32489. * Naked functions must not use any forms of inline attribute. Introduced as future incompatibility lint in 1.56 rust-lang#87652.
…henkov add support for the l4-bender linker on the x86_64-unknown-l4re-uclibc tier 3 target This PR contains the work by ```@humenda``` to update support for the `x86_64-unknown-l4re-uclibc` tier 3 target (published at [humenda/rust](https://github.com/humenda/rust)), rebased and adapted to current rust in follow up commits by myself. The publishing of the rebased changes is authorized and preferred by the original author. As the goal was to distort the original work as little as possible, individual commits introduce changes that are incompatible to the newer code base that the changes were rebased on. These incompatibilities have been remedied in follow up commits, so that the PR as a whole should result in a clean update of the target. If you prefer another strategy to mainline these changes while preserving attribution, please let me know.
Print a helpful message if unwinding aborts when it reaches a nounwind function This is implemented by routing `TerminatorKind::Abort` back through the panic handler, but with a special flag in the `PanicInfo` which indicates that the panic handler should *not* attempt to unwind the stack and should instead abort immediately. This is useful for the planned change in rust-lang/lang-team#97 which would make `Drop` impls `nounwind` by default. ### Code ```rust #![feature(c_unwind)] fn panic() { panic!() } extern "C" fn nounwind() { panic(); } fn main() { nounwind(); } ``` ### Before ``` $ ./test thread 'main' panicked at 'explicit panic', test.rs:4:5 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace Illegal instruction (core dumped) ``` ### After ``` $ ./test thread 'main' panicked at 'explicit panic', test.rs:4:5 note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace thread 'main' panicked at 'panic in a function that cannot unwind', test.rs:7:1 stack backtrace: 0: 0x556f8f86ec9b - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hdccefe11a6ac4396 1: 0x556f8f88ac6c - core::fmt::write::he152b28c41466ebb 2: 0x556f8f85d6e2 - std::io::Write::write_fmt::h0c261480ab86f3d3 3: 0x556f8f8654fa - std::panicking::default_hook::{{closure}}::h5d7346f3ff7f6c1b 4: 0x556f8f86512b - std::panicking::default_hook::hd85803a1376cac7f 5: 0x556f8f865a91 - std::panicking::rust_panic_with_hook::h4dc1c5a3036257ac 6: 0x556f8f86f079 - std::panicking::begin_panic_handler::{{closure}}::hdda1d83c7a9d34d2 7: 0x556f8f86edc4 - std::sys_common::backtrace::__rust_end_short_backtrace::h5b70ed0cce71e95f 8: 0x556f8f865592 - rust_begin_unwind 9: 0x556f8f85a764 - core::panicking::panic_no_unwind::h2606ab3d78c87899 10: 0x556f8f85b910 - test::nounwind::hade6c7ee65050347 11: 0x556f8f85b936 - test::main::hdc6e02cb36343525 12: 0x556f8f85b7e3 - core::ops::function::FnOnce::call_once::h4d02663acfc7597f 13: 0x556f8f85b739 - std::sys_common::backtrace::__rust_begin_short_backtrace::h071d40135adb0101 14: 0x556f8f85c149 - std::rt::lang_start::{{closure}}::h70dbfbf38b685e93 15: 0x556f8f85c791 - std::rt::lang_start_internal::h798f1c0268d525aa 16: 0x556f8f85c131 - std::rt::lang_start::h476a7ee0a0bb663f 17: 0x556f8f85b963 - main 18: 0x7f64c0822b25 - __libc_start_main 19: 0x556f8f85ae8e - _start 20: 0x0 - <unknown> thread panicked while panicking. aborting. Aborted (core dumped) ```
…elid Update pulldown-cmark version to fix markdown list issue Fixes rust-lang#92971. r? ```@camelid```
Simplify use of `map_or`
…on, r=oli-obk Increase the format version of rustdoc-json-types PR rust-lang#87648 changed `rustdoc-json-types` without increasing the format version. rust-lang@e7529d6#diff-ede26372490522288745c5b3df2b6b2a1cc913dcd09b29af3a49935afe00c7e6 This PR increase the format version by +1 and move the `FORMAT_VERSION` constant to the start of the file to hopefully make it more clear that `rustdoc-json-types` is versioned.
Interner cleanups Improve some code that I have found confusing. r? ```@lcnr```
…nctions, r=Amanieu Reject unsupported naked functions Transition unsupported naked functions future incompatibility lint into an error: * Naked functions must contain a single inline assembly block. Introduced as future incompatibility lint in 1.50 rust-lang#79653. Change into an error fixes a soundness issue described in rust-lang#32489. * Naked functions must not use any forms of inline attribute. Introduced as future incompatibility lint in 1.56 rust-lang#87652. Closes rust-lang#32490. Closes rust-lang#32489. r? ```@Amanieu``` ```@npmccallum``` ```@joshtriplett```
…ns, r=jsha Add missing GUI test explanations Some GUI tests didn't have a global explanation about what they were testing. This fixes it. r? ```@jsha```
rustdoc: remove dashed underline under main heading This was removed in rust-lang#92797 but accidentally re-introduced by a bad merge in rust-lang#92861. r? ```@camelid```
rustbot
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@bors r+ rollup=never p=9 |
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📌 Commit 19e414a has been approved by |
bors
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the
S-waiting-on-bors
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☀️ Test successful - checks-actions |
This was referenced Jan 22, 2022
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Finished benchmarking commit (bfe1564): comparison url. Summary: This benchmark run did not return any relevant changes. If you disagree with this performance assessment, please file an issue in rust-lang/rustc-perf. @rustbot label: -perf-regression |
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Successful merges:
map_or#93116 (Simplify use ofmap_or)Failed merges:
r? @ghost
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