Stream: git-wasmtime

Topic: wasmtime / PR #14647 cranelift: save and reload fuel arou...

Wasmtime GitHub notifications bot (Oct 09 2026 at 23:47):

ctiller opened PR #14647 from ctiller:fix/epoch-check-fuel to bytecodealliance:main:

When both consume_fuel and epoch_interruption are enabled, FuncEnvironment::epoch_check_full emits a conditional call to the new_epoch libcall at function entry and loop headers. Although fuel_check flushes buffered fuel into the SSA variable self.fuel_var immediately beforehand, epoch_check_full did not store self.fuel_var back to VMStoreContext::fuel_consumed before invoking new_epoch or reload it afterwards.

Consequently, if the epoch deadline callback inspected store.get_fuel() or trapped (UpdateDeadline::Interrupt / Err(...)), all fuel consumed since the last store synchronization was missing from the Store.

Save self.fuel_var before calling new_epoch and reload self.fuel_var afterwards when consume_fuel is enabled.

Assisted-by: Gemini

Wasmtime GitHub notifications bot (Oct 09 2026 at 23:47):

ctiller requested cfallin for a review on PR #14647.

Wasmtime GitHub notifications bot (Oct 09 2026 at 23:47):

ctiller requested wasmtime-compiler-reviewers for a review on PR #14647.

Wasmtime GitHub notifications bot (Oct 09 2026 at 23:47):

ctiller requested wasmtime-core-reviewers for a review on PR #14647.

Wasmtime GitHub notifications bot (Oct 10 2026 at 00:25):

:thumbs_up: cfallin submitted PR review:

Thanks!

Wasmtime GitHub notifications bot (Oct 10 2026 at 00:25):

cfallin added PR #14647 cranelift: save and reload fuel around new_epoch libcall to the merge queue.

Wasmtime GitHub notifications bot (Oct 10 2026 at 04:12):

github-merge-queue[bot] removed PR #14647 cranelift: save and reload fuel around new_epoch libcall from the merge queue.

Last updated: Oct 11 2026 at 04:10 UTC