[DebugInfo] Fix container types failing to find template args #147179
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Rollup of 22 pull requests Successful merges: - #128666 (Add `overflow_checks` intrinsic) - #146305 (Add correct suggestion for multi-references for self type in method) - #147179 ([DebugInfo] Fix container types failing to find template args) - #147743 (Show packed field alignment in mir_transform_unaligned_packed_ref) - #148079 (Rename `downcast_[ref|mut]_unchecked` -> `downcast_unchecked_[ref|mut]`) - #148084 (Optimize path components iteration on platforms that don't have prefixes) - #148126 (Fix rust stdlib build failing for VxWorks) - #148204 (Modify contributor email entries in .mailmap) - #148279 (rustc_builtin_macros: rename bench parameter to avoid collisions with user-defined function names) - #148333 (constify result unwrap unchecked) - #148539 (Add Allocator proxy impls for Box, Rc, and Arc) - #148601 (`invalid_atomic_ordering`: also lint `update` & `try_update`) - #148612 (Add note for identifier with attempted hygiene violation) - #148613 (Switch hexagon targets to rust-lld) - #148619 (Enable std locking functions on AIX) - #148644 ([bootstrap] Make `--open` option work with `doc src/tools/error_index_generator`) - #148649 (don't completely reset `HeadUsages`) - #148673 (Remove a remnant of `dyn*` from the parser) - #148675 (Remove eslint-js from npm dependencies) - #148680 (Recover `[T: N]` as `[T; N]`) - #148688 (Remove unused argument `features` from `eval_config_entry`) - #148711 (Use the current lint note id when parsing `cfg!()`) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of #147179 - Walnut356:template_lookup, r=Mark-Simulacrum [DebugInfo] Fix container types failing to find template args This is a less pervasive (but also less powerful) alternative to #144394. This change *only* provides benefits to container types on MSVC. The TL;DR is that nodes that don't populate/aren't discoverable in the PDB for various reasons are given an alternate lookup path that generates the nodes by acquiring the base-type via some gross string manipulation and then asking clang for the node it wants (e.g. `"ref$<i32>"` -> `"i32"` -> `target.FindFirstType("i32").GetPointerType()` -> `i32 *`, which is a valid type for the container to use) The before/afters are the same as in the above PR's `*-msvc` LLDB screenshots. This works as a stopgap while the above PR is evaluated, but I think that PR is still a much better solution.
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This is a less pervasive (but also less powerful) alternative to #144394.
This change only provides benefits to container types on MSVC. The TL;DR is that nodes that don't populate/aren't discoverable in the PDB for various reasons are given an alternate lookup path that generates the nodes by acquiring the base-type via some gross string manipulation and then asking clang for the node it wants (e.g.
"ref$<i32>"->"i32"->target.FindFirstType("i32").GetPointerType()->i32 *, which is a valid type for the container to use)The before/afters are the same as in the above PR's
*-msvcLLDB screenshots. This works as a stopgap while the above PR is evaluated, but I think that PR is still a much better solution.