Wasmtime GitHub notifications bot (Oct 09 2026 at 22:51): Wasmtime GitHub notifications bot (Oct 09 2026 at 22:51):cfallin opened PR #14642 from cfallin:fix-tail-unwinding to bytecodealliance:main:
While Wasmtime doesn't use the DWARF unwind info / frame definitions, it is still useful to try to get them to be as correct as possible, because native debugging and especially native profiling (
perf record,samply, etc) use this info.Previously, the definition of the CFA did not quite stay in sync with a valid frame when we move the frame due to a resizing argument area on tail-calls. This PR reworks the metadata to instead define the CFA in terms of the FP and leave FP unchanged until we switch to the new frame.
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Wasmtime GitHub notifications bot (Oct 09 2026 at 22:51):cfallin requested wasmtime-compiler-reviewers for a review on PR #14642.
Wasmtime GitHub notifications bot (Oct 09 2026 at 22:51):cfallin requested alexcrichton for a review on PR #14642.
Wasmtime GitHub notifications bot (Oct 09 2026 at 22:58)::thumbs_up: alexcrichton submitted PR review.
Wasmtime GitHub notifications bot (Oct 09 2026 at 22:59):alexcrichton has enabled auto merge for PR #14642.
Wasmtime GitHub notifications bot (Oct 09 2026 at 23:10):alexcrichton added PR #14642 Cranelift: fix unwind info around tail calls. to the merge queue
Wasmtime GitHub notifications bot (Oct 10 2026 at 02:12)::check: alexcrichton merged PR #14642.
Wasmtime GitHub notifications bot (Oct 10 2026 at 02:12):alexcrichton removed PR #14642 Cranelift: fix unwind info around tail calls. from the merge queue
Last updated: Oct 11 2026 at 04:10 UTC