Rollup of 8 pull requests #93541
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Rollup of 8 pull requests #93541
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…roideabi` rlib I ran `./x.py dist --host= --target=armv7-linux-androideabi` before this diff: ``` $ nm build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/armv7-linux-androideabi/lib/libcompiler_builtins-3d9661a82c59c66a.rlib 2> /dev/null | grep __sync_fetch_and_add_4 | wc -l 2 ``` And after: ``` $ nm build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/armv7-linux-androideabi/lib/libcompiler_builtins-ffd2745070943321.rlib 2> /dev/null | grep __sync_fetch_and_add_4 | wc -l 1 ``` Fixes rust-lang#93310
it ignored regions and constants in adts, but didn't do so for references or any other types. This seemed quite weird
…=nagisa Enable combining `+crt-static` and `relocation-model=pic` on `x86_64-unknown-linux-gnu` Modern `gcc` versions support `-static-pie`, and `rustc` will already fall-back to `-static` if the local `gcc` is too old (and hence this change is optimistic rather than absolute). This brings the `-musl` and `-gnu` targets to feature compatibility (albeit with different default settings). Of note a `-static` or `-static-pie` binary based on glibc that uses NSS-backed functions (`gethostbyname` or `getpwuid` etc.) need to have access to the `libnss_X.so.2` libraries and any of their dynamic dependencies. I wasn't sure about the `# only`/`# ignore` changes (I've not got a `gnux32` toolchain to test with hence not also enabling `-static-pie` there).
Implement `RawWaker` and `Waker` getters for underlying pointers implement rust-lang#87021 New APIs: - `RawWaker::data(&self) -> *const ()` - `RawWaker::vtable(&self) -> &'static RawWakerVTable` - ~`Waker::as_raw_waker(&self) -> &RawWaker`~ `Waker::as_raw(&self) -> &RawWaker` This third one is an auxiliary function to make the two APIs above more useful. Since we can only get `&Waker` in `Future::poll`, without this, we need to `transmute` it into `&RawWaker` (relying on `repr(transparent)`) in order to access its data/vtable pointers. ~Not sure if it should be named `as_raw` or `as_raw_waker`. Seems we always use `as_<something-raw>` instead of just `as_raw`. But `as_raw_waker` seems not quite consistent with `Waker::from_raw`.~ As suggested in rust-lang#91828 (comment), use `as_raw`.
…=Mark-Simulacrum Eliminate duplicate codes of is_single_fp_element There are duplicate codes of is_single_fp_element function. Merge these codes to TyAndLayout impl block. 
add rustc lint, warning when iterating over hashmaps 2 first introduced in rust-lang#89558 and reverted in rust-lang#90380 due to its perf impact r? `@estebank`
…r=yaahc Support configuring whether to capture backtraces at runtime Tracking issue: rust-lang#93346 This adds a new API to the `std::panic` module which configures whether and how the default panic hook will emit a backtrace when a panic occurs. After discussion with `@yaahc` on [Zulip](https://rust-lang.zulipchat.com/#narrow/stream/219381-t-libs/topic/backtrace.20lib.20vs.2E.20panic), this PR chooses to avoid adjusting or seeking to provide a similar API for the (currently unstable) std::backtrace API. It seems likely that the users of that API may wish to expose more specific settings rather than just a global one (e.g., emulating the `env_logger`, `tracing` per-module configuration) to avoid the cost of capture in hot code. The API added here could plausibly be copied and/or re-exported directly from std::backtrace relatively easily, but I don't think that's the right call as of now. ```rust mod panic { #[derive(Copy, Clone, Debug, PartialEq, Eq)] #[non_exhaustive] pub enum BacktraceStyle { Short, Full, Off, } fn set_backtrace_style(BacktraceStyle); fn get_backtrace_style() -> Option<BacktraceStyle>; } ``` Several unresolved questions: * Do we need to move to a thread-local or otherwise more customizable strategy for whether to capture backtraces? See [this comment](rust-lang#79085 (comment)) for some potential use cases for this. * Proposed answer: no, leave this for third-party hooks. * Bikeshed on naming of all the options, as usual. * Should BacktraceStyle be moved into `std::backtrace`? * It's already somewhat annoying to import and/or re-type the `std::panic::` prefix necessary to use these APIs, probably adding a second module to the mix isn't worth it. Note that PR rust-lang#79085 proposed a much simpler API, but particularly in light of the desire to fully replace setting environment variables via `env::set_var` to control the backtrace API, a more complete API seems preferable. This PR likely subsumes that one.
implement a lint for suspicious auto trait impls cc rust-lang#85048 (comment) r? `@nikomatsakis`
remove `TyS::same_type` This function ignored regions and constants in adts, but didn't do so for references or any other types. cc rust-lang#93148 (comment)
Update compiler_builtins to fix duplicate symbols in `armv7-linux-androideabi` rlib I ran `./x.py dist --host= --target=armv7-linux-androideabi` before this diff: ``` $ nm build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/armv7-linux-androideabi/lib/libcompiler_builtins-3d9661a82c59c66a.rlib 2> /dev/null | grep __sync_fetch_and_add_4 | wc -l 2 ``` And after: ``` $ nm build/x86_64-unknown-linux-gnu/stage2/lib/rustlib/armv7-linux-androideabi/lib/libcompiler_builtins-ffd2745070943321.rlib 2> /dev/null | grep __sync_fetch_and_add_4 | wc -l 1 ``` Fixes rust-lang#93310 See also rust-lang/compiler-builtins#449 and rust-lang/compiler-builtins#450
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Successful merges:
+crt-staticandrelocation-model=piconx86_64-unknown-linux-gnu#86374 (Enable combining+crt-staticandrelocation-model=piconx86_64-unknown-linux-gnu)RawWakerandWakergetters for underlying pointers #91828 (ImplementRawWakerandWakergetters for underlying pointers)TyS::same_type#93290 (removeTyS::same_type)armv7-linux-androideabirlib #93436 (Update compiler_builtins to fix duplicate symbols inarmv7-linux-androideabirlib)Failed merges:
r? @ghost
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