[experimental] shorten backtraces using debuginfo #134831
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[experimental] shorten backtraces using debuginfo cc rust-lang/compiler-team#818 r? `@ghost` `@rustbot` label S-experimental try-job: aarch64-apple
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i think rustc_middle is going to fail to compile, so @bors cancel try |
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[experimental] shorten backtraces using debuginfo cc rust-lang/compiler-team#818 r? `@ghost` `@rustbot` label S-experimental try-job: aarch64-apple
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💔 Test failed - checks-actions |
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[experimental] shorten backtraces using debuginfo cc rust-lang/compiler-team#818 r? `@ghost` `@rustbot` label S-experimental try-job: aarch64-apple
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💔 Test failed - checks-actions |
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☔ The latest upstream changes (presumably #135053) made this pull request unmergeable. Please resolve the merge conflicts. |
- give an error when `#[rustc_start/end_short_backtrace]` is used with `#[inline]` - update `short_ice-remove-middle-frames` to use the new attribute so that it's tested - don't ICE when debug logging
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Often, consumers of a DWARF file will want to know if a given function has an attribute, either directly or indirectly. Currently, finding that information is tedious and prone to error. Add a helper function in gimli to make this easier. This does not attempt to have the maximum possible performance; consumers who care about that can still implement the logic themselves. In particular, the caches are recalculated each time `shared_attrs` is called, introducing an allocation. The logic works roughly as follows (inspired by [addr2line::Function::parse_children](https://github.com/gimli-rs/addr2line/blob/28ba2d45f2d22134915f55b46ddd6a039559366b/src/function.rs#L278)): - Create a cache of all DWARF units known to the `UnitRef` - Given an entry offset, iterate over all its attributes and pass them to a callback chosen by the caller. - For each indirect attribute, such as `DW_AT_abstract_origin`, follow the pointer to the abstract source and do the same thing again there. I have tested this downstream (see [rust-lang/rust#134831](rust-lang/rust#134831)), but I have not yet added unit tests. Let me know how you would like this to be tested.
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cc rust-lang/compiler-team#818
r? @ghost
@rustbot label S-experimental
try-job: aarch64-apple