Stream: git-wasmtime

Topic: wasmtime / PR #7478 Reset sp_offset when resetting stack ...

Wasmtime GitHub notifications bot (Nov 03 2023 at 19:30):

jeffcharles opened PR #7478 from jeffcharles:winch-unreachable-reset-sp-offset to bytecodealliance:main:

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This is a fix for a fuzzer testcase triggering an assertion of sp_offset not equaling locals_size where there was a function which had spilled a local and ended with unreachable. I've added a minimal reproduction of the test case as the filetest with_spilled_local.wat. While investigating, it looks like something similar happens when unreachable is the last instruction in an if followed by an else (covered by the other filetest added). Having reset_stack also reset the sp_offset clears up both assertion failures.

Wasmtime GitHub notifications bot (Nov 03 2023 at 19:30):

jeffcharles requested elliottt for a review on PR #7478.

Wasmtime GitHub notifications bot (Nov 03 2023 at 19:30):

jeffcharles requested wasmtime-compiler-reviewers for a review on PR #7478.

Wasmtime GitHub notifications bot (Nov 03 2023 at 20:37):

saulecabrera submitted PR review:

I left a minor comment the regarding an invariant that we should verify. After fixing it, we can land this.

Wasmtime GitHub notifications bot (Nov 03 2023 at 20:37):

saulecabrera submitted PR review:

I left a minor comment the regarding an invariant that we should verify. After fixing it, we can land this.

Wasmtime GitHub notifications bot (Nov 03 2023 at 20:37):

saulecabrera created PR review comment:

Can we also assert that masm.sp_offset() - target_sp equals the size of all the Memory entries in the value stack that got dropped?

Wasmtime GitHub notifications bot (Nov 03 2023 at 20:47):

jeffcharles updated PR #7478.

Wasmtime GitHub notifications bot (Nov 03 2023 at 21:18):

jeffcharles requested saulecabrera for a review on PR #7478.

Wasmtime GitHub notifications bot (Nov 03 2023 at 21:26):

saulecabrera submitted PR review.

Wasmtime GitHub notifications bot (Nov 03 2023 at 22:12):

saulecabrera merged PR #7478.

Last updated: Dec 13 2025 at 19:03 UTC