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Rollup of 7 pull requests - #72733
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RalfJung wants to merge 48 commits into
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Miri's pointer_offset_inbounds implementation has been moved into librustc_mir as ptr_offset_inbounds (to avoid breaking miri on a nightly update). The comments have been slightly reworked to better match `offset`'s external documentation about what causes UB. The intrinsic implementations are taken directly from miri. Signed-off-by: Joe Richey <joerichey@google.com>
Signed-off-by: Joe Richey <joerichey@google.com>
Signed-off-by: Joe Richey <joerichey@google.com>
Signed-off-by: Joe Richey <joerichey@google.com>
Signed-off-by: Joe Richey <joerichey@google.com>
This is tricky to get right if we want to avoid panicking or wrapping. Signed-off-by: Joe Richey <joerichey@google.com>
The previous code paniced if offset_bytes == i64::MIN. This commit: - Properly computes the absoulte value to avoid this panic - Adds a test for this edge case Signed-off-by: Joe Richey <joerichey@google.com>
Prior art: `rust_analyzer` uses [`Parser::eat`](https://github.com/rust-analyzer/rust-analyzer/blob/50f4ae798b7c54d417ee88455b87fd0477473150/crates/ra_parser/src/parser.rs#L94), which is `next_if` specialized to `|y| next_if(|x| x == y)`. Basically every other parser I've run into in Rust has an equivalent of Parser::eat; see for example - [cranelift](https://github.com/bytecodealliance/wasmtime/blob/94190d57244b26baf36629c88104b0ba516510cf/cranelift/reader/src/parser.rs#L498) - [rcc](https://github.com/jyn514/rcc/blob/a8159c3904a0c950fbba817bf9109023fad69033/src/parse/mod.rs#L231) - [crunch](https://github.com/Kixiron/crunch-lang/blob/8521874fab8a7d62bfa7dea8bd1da94b63e31be8/crates/crunch-parser/src/parser/mod.rs#L213-L241)
…or packed borrows in unsafe fns
Detect type parameter that might require lifetime constraint. Do not name `ReVar`s in expected/found output. Reword text suggesting to check the lifetimes.
We now perform the correct checks even if the pointer size differs between the host and target. Signed-off-by: Joe Richey <joerichey@google.com>
Tweak impl signature mismatch errors involving `RegionKind::ReVar` lifetimes Fixrust-lang#66406, fixrust-lang#72106. ``` error: `impl` item signature doesn't match `trait` item signature --> $DIR/trait-param-without-lifetime-constraint.rs:14:5 | LL | fn get_relation(&self) -> To; | ----------------------------- expected `fn(&Article) -> &ProofReader` ... LL | fn get_relation(&self) -> &ProofReader { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ found `fn(&Article) -> &ProofReader` | = note: expected `fn(&Article) -> &ProofReader` found `fn(&Article) -> &ProofReader` help: the lifetime requirements from the `impl` do not correspond to the requirements in the `trait` --> $DIR/trait-param-without-lifetime-constraint.rs:10:31 | LL | fn get_relation(&self) -> To; | ^^ consider borrowing this type parameter in the trait ``` r? @nikomatsakis
impl From<[T; N]> for Box<[T]> Based on rust-lang#68692
Make pointer offset methods/intrinsics const Implements rust-lang#71499 using [the implementations from miri](https://github.com/rust-lang/miri/blob/52f5d202bdcfe8986f0615845f8d1647ab8a2c6a/src/shims/intrinsics.rs#L96-L112). I added some tests what's allowed and what's UB. Let me know if any other cases should be added. CC: @RalfJung@oli-obk
linker: Support `-static-pie` and `-static -shared` This PR adds support for passing linker arguments for creating statically linked position-independent executables and "statically linked" shared libraries. Therefore it incorporates the majority of rust-lang#70740 except for the linker rerun hack and actually flipping the "`static-pie` is supported" switch for musl targets.
…afe-fn, r=nikomatsakis Implement RFC 2585: unsafe blocks in unsafe fn Tracking issue: rust-lang#71668 r? @RalfJung cc @nikomatsakis
…chievink borrowck `DefId` -> `LocalDefId` Replaces some `DefId`s which must always be local with `LocalDefId` in `librustc_mir/borrowck`. cc @marmeladema
Add Peekable::next_if Prior art: `rust_analyzer` uses [`Parser::eat`](https://github.com/rust-analyzer/rust-analyzer/blob/50f4ae798b7c54d417ee88455b87fd0477473150/crates/ra_parser/src/parser.rs#L94), which is `next_if` specialized to `|y| self.next_if(|x| x == y)`. Basically every other parser I've run into in Rust has an equivalent of `Parser::eat`; see for example - [cranelift](https://github.com/bytecodealliance/wasmtime/blob/94190d57244b26baf36629c88104b0ba516510cf/cranelift/reader/src/parser.rs#L498) - [rcc](https://github.com/jyn514/rcc/blob/a8159c3904a0c950fbba817bf9109023fad69033/src/parse/mod.rs#L231) - [crunch](https://github.com/Kixiron/crunch-lang/blob/8521874fab8a7d62bfa7dea8bd1da94b63e31be8/crates/crunch-parser/src/parser/mod.rs#L213-L241) Possible extensions: A specialization of `next_if` to using `Eq::eq`. The only difficulty here is the naming - maybe `next_if_eq`? Alternatives: - Instead of `func: impl FnOnce(&I::Item) -> bool`, use `func: impl FnOnce(I::Item) -> Option<I::Item>`. This has the advantage that `func` can move the value if necessary, but means that there is no guarantee `func` will return the same value it was given. - Instead of `fn next_if(...) -> Option<I::Item>`, use `fn next_if(...) -> bool`. This makes the common case of `iter.next_if(f).is_some()` easier, but makes the unusual case impossible. Bikeshedding on naming: - `next_if` could be renamed to `consume_if` (to match `eat`, but a little more formally) - `next_if_eq` could be renamed to `consume`. This is more concise but less self-explanatory if you haven't written a lot of parsers. - Both of the above, but with `consume` replaced by `eat`.
RalfJung
commented
May 29, 2020
MemberAuthor
bors
commented
May 29, 2020
Collaborator
📌 Commit 783cfb1 has been approved by |
bors
commented
May 29, 2020
Collaborator
⌛ Testing commit 783cfb1 with merge 12268b84def96542ba9482cac43b1c300a537f74... |
Dylan-DPC-zz
commented
May 29, 2020
Closing this and rolling a bigger one because the queue is long @bors r- |
RalfJung
commented
May 29, 2020
MemberAuthor
Okay. This one had PR CI pass at least. :D (and the two previous attempts failed in PR CI, identifying two faulty PRs in the queue) |
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Successful merges:
RegionKind::ReVarlifetimes #67460 (Tweak impl signature mismatch errors involvingRegionKind::ReVarlifetimes)-static-pieand-static -shared#71804 (linker: Support-static-pieand-static -shared)DefId->LocalDefId#72103 (borrowckDefId->LocalDefId)Failed merges:
r? @ghost