Rollup of 9 pull requests #70130
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Rollup of 9 pull requests #70130
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This didn't cause issues before since generator types were always considered to "need drop", leading to unwind paths (including a `Resume` block) always getting generated.
The indices do not matter here, and this fixes an index out of bounds panic when compiling a generator that can unwind but not return.
Co-Authored-By: bjorn3 <bjorn3@users.noreply.github.com>
Removed in rust-lang#69247 while this PR was waiting to merge.
This mitigates possible issues when signal stacks overflow, which could manifest as segfaults or in unlucky circumstances possible clobbering of other memory values as stack overflows tend to enable.
…ther also unmap the whole thing when cleaning up, rather than leaving a spare page floating around.
This implements a flag `-Zlink-native-libraries=yes/no`. If set to true/yes, or unspecified, then native libraries referenced via `#[link]` attributes will be put on the linker line (ie, unchanged behaviour). If `-Zlink-native-libraries=no` is specified then rustc will not add the native libraries to the link line. The assumption is that the outer build system driving the build already knows about the native libraries and will specify them to the linker directly (for example via `-Clink-arg=`). Addresses issue rust-lang#70093
This commit fixes an issue when using `set_print` and friends, notably used by libtest, to avoid aborting the process if printing panics. This previously panicked due to borrowing a mutable `RefCell` twice, and this is worked around by borrowing these cells for less time, instead taking out and removing contents temporarily. Closes rust-lang#69558
rustc: don't resolve Instances which would produce malformed shims. There are some `InstanceDef` variants (shims and drop "glue") which contain a `Ty`, and that `Ty` is used in generating the shim MIR. But if that `Ty` mentions any generic parameters, the generated shim would refer to them (but they won't match the `Substs` of the `Instance`), or worse, generating the shim would fail because not enough of the type is known. Ideally we would always produce a "skeleton" of the type, e.g. `(_, _)` for dropping any tuples with two elements, or `Vec<_>` for dropping any `Vec` value, but that's a lot of work, and they would still not match the `Substs` of the `Instance` as it exists today, so `Instance` would probably need to change. By making `Instance::resolve` return `None` in the still-generic cases, we get behavior similar to specialization, where a default can only be used if there are no more generic parameters which would allow a more specialized `impl` to match. <hr/> This was found while testing the MIR inliner with rust-lang#68965, because it was trying to inline shims. cc @rust-lang/wg-mir-opt
…mulacrum tidy: Better license checks. This implements some improvements to the license checks in tidy: * Use `cargo_metadata` instead of parsing vendored crates. This allows license checks to run without vendoring enabled, and allows the checks to run on PR builds. * Check for stale entries. * Check that the licenses for exceptions are what we think they are. * Verify exceptions do not leak into the runtime. Closes rust-lang#62618 Closes rust-lang#62619 Closes rust-lang#63238 (I think) There are some substantive changes here. The follow licenses have changed from the original comments: * openssl BSD+advertising clause to Apache-2.0 * pest MPL2 to MIT/Apache-2.0 * smallvec MPL2 to MIT/Apache-2.0 * clippy lints MPL2 to MIT OR Apache-2.0
Smaller and more correct generator codegen This removes unnecessary panicking branches in the resume function when the generator can not return or unwind, respectively. Closes rust-lang#66100 It also addresses the correctness concerns wrt poisoning on unwind. These are not currently a soundness issue because any operation *inside* a generator that could possibly unwind will result in a cleanup path for dropping it, ultimately reaching a `Resume` terminator, which we already handled correctly. Future MIR optimizations might optimize that out, though. r? @Zoxc
…lacrum Regenerate tables for Unicode 13.0.0
…Mark-Simulacrum std: Don't abort process when printing panics in tests This commit fixes an issue when using `set_print` and friends, notably used by libtest, to avoid aborting the process if printing panics. This previously panicked due to borrowing a mutable `RefCell` twice, and this is worked around by borrowing these cells for less time, instead taking out and removing contents temporarily. Closes rust-lang#69558
unix: Set a guard page at the end of signal stacks This mitigates possible issues when signal stacks overflow, which could manifest as segfaults or in unlucky circumstances possible clobbering of other memory values as stack overflows tend to enable. I went ahead and made a PR for this because it's a pretty small change, though if I should open an issue/RFC for this and discuss there first I'll happily do so. I've also added some example programs that demonstrate the uncomfortably clobber-happy behavior we currently have, and the segfaults that could/should result instead, [here](https://github.com/iximeow/jubilant-train).
…kinnison [rustdoc] Improve visibility for code blocks warnings It appeared that a lot of people didn't notice when a code block was meant to fail compilation or wasn't tested at all. The changes here make the colors less transparent and the icon bigger. So before it looked like this:   And now it looks like this:   cc @rust-lang/rustdoc r? @kinnison
Use copy bound in atomic operations to generate simpler MIR
Implement -Zlink-native-libraries This implements a flag `-Zlink-native-libraries=yes/no`. If set to true/yes, or unspecified, then native libraries referenced via `#[link]` attributes will be put on the linker line (ie, unchanged behaviour). If `-Zlink-native-libraries=no` is specified then rustc will not add the native libraries to the link line. The assumption is that the outer build system driving the build already knows about the native libraries and will specify them to the linker directly (for example via `-Clink-arg=`). Addresses issue rust-lang#70093
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@bors r+ p=9 rollup=never |
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📌 Commit 89dbdc7 has been approved by |
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🌲 The tree is currently closed for pull requests below priority 5, this pull request will be tested once the tree is reopened |
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Rollup of 9 pull requests Successful merges: - #69036 (rustc: don't resolve Instances which would produce malformed shims.) - #69443 (tidy: Better license checks.) - #69814 (Smaller and more correct generator codegen) - #69929 (Regenerate tables for Unicode 13.0.0) - #69959 (std: Don't abort process when printing panics in tests) - #69969 (unix: Set a guard page at the end of signal stacks) - #70005 ([rustdoc] Improve visibility for code blocks warnings) - #70088 (Use copy bound in atomic operations to generate simpler MIR) - #70095 (Implement -Zlink-native-libraries) Failed merges: r? @ghost
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💔 Test failed - checks-azure |
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r? @ghost