Changed

• Wasmi's internal Handle trait no longer has a From super-trait. #1804
  • This fixes an issue from users with conflicting From impls for Wasmi handles
    such as Func, Global, etc..

Added

• Implemented some improvements for wasmi::Table.
  • Added Ref and RefType and make wasmi::Table operate on Ref instead of Val. #1747
    • This has be beneficial side-effect that wasmi::Table is now unaffected by
      the simd crate feature and no longer suffers from increased memory consumption.
    • Furthermore, this improves Wasmi's Wasmtime API mirror as Wasmtime also uses Ref and RefType.
  • Shrink wasmi::Table elements from 64-bit to 32-bit. #1776
    • This effectively halfs the memory consumption of wasmi::Table instances.
• Designed and integrated an entirely new internal IR for Wasmi. #1655
  • This affects both execution and translation performance.
  • New crate features have been added:
    • portable-dispatch:
      Enable to compile Wasmi on any platform supported by Rust
      However, this may significantly reduce execution performance.
    • indirect-dispatch:
      Enable to use less encoding space for Wasmi's internal IR.
      However, this may significantly reduce execution performance.
• Wasmi's executor now uses fixed 64-bits cells. #1755
  • This technically is an internal change but it yields observable improvements for users.
  • Enabling the simd crate feature no longer affects memory consumption or
    execution performance of non-simd Wasm code.
• Implement a variety of improvements for the Wasmi CLI application.
  • Added a bunch of new crate features to the wasmi_cli crate:
    • PRs: #1784 #1787 #1788
    • wasi: Enable WASI support. (default: ✅)
    • wast: Enable Wast support and wast command. (default: ✅)
    • run: Enable the run command (default: ✅)
    • portable-dispatch: Enable wasmi's portable-dispatch crate feature. (default: ❌)
    • indirect-dispatch: Enable wasmi's indirect-dispatch crate feature. (default: ❌)
  • Similar to Wasmtime's CLI, Wasmi now also features sub-commands: #1799
    • run: Executes a WebAssembly module.
    • wast: Executes a WebAssembly script.
  • The Wasmi CLI's command has been renamed from wasmi_cli to just wasmi. #1798
• Add wasmi_wasi::add_to_externals API. #1785
  • This is more efficient than the existing add_to_linker API and should
    be used instead if possible.
  • The Wasmi CLI application now makes use of this API in order to prepare
    its WASI environment.

Changed

• Wasmi now uses Rust edition 2024 in the entire workspace. #1759
  • This does not affect users since Wasmi's MSRV did not change.

Internal

• Use OIDC in Wasmi coverage CI job. #1745
• Wasmi differential fuzzing oracles are not optionally included. #1758
  • This allows to exclude fuzzing oracles to speed-up fuzzing and compile times.
• Add a new GitHub Actions CI job to check via cargo-deny. #1761
• Refactored wasmi_collections arena data structures. #1771
• Removed ancient Wasmi v0.31 as oracle for differential fuzzing. #1777
• Renamed internal Untyped{Val,Ref} types to Raw{Val,Ref}. #1781
• Refactor and unify Wasmi's internal handle types. #1772

Fixed

• Fixed a bug that Wasmi's translator would sometimes incorrectly merge copy instructions. #1779

Fixed

• Fixed another bug with incorrect translation of wide-arithmetic ops followed by local.set. #1762

Fixed

• Fixed a bug that local.set fusion with some wide-arithmetic ops was working incorrectly. #1756
  • Thanks to louismerlin for the detailed bug report.

Fixed

• Fixed a bug that local preservation of Wasm loops was missing. #1748
  • Thanks to davnavr for reporting the bug.

Fixed

• Fix a bug in the execution of i{32,64}.rem_s(MAX, -1). rev-1c3682f
  • The Wasm spec demanded to return 0 while Wasmi trapped with integer-overflow.
  • Thanks to davnavr for the detailed bug report.

Fixed

• Fix Config::set_max_stack_height check. #1727
  • Thanks to @gramseyer for the fix!

Fixed

• Fixed a bug that Config::set_max_cached_stacks set the recursion limit instead.
  • Thanks to Robert MacWha for reporting the issue.

Fixed

• Fixed a memory leak in ByteBuffer introduced in the last patch.
  • Thanks to Robert MacWha for reporting the issue.