v0.40.0 - 2024-11-28

This release focuses on compile time improvements for Wasmi,
significantly reducing the time it takes to compile Wasmi and
decrease its compiled artifact size.

Added

• Added optimization for load and store lowering. #1303
  • This reduces the total number of Wasmi instructions.
• Added prefix-symbols crate feature to wasmi_c_api_impl crate. #1315
  • This allows to prefix all exported symbols with wasmi_ in order to
    avoid duplicate symbols when linking multiple Wasm runtimes implementing
    the Wasm C-API.

Fixed

• C-API
  • Fix a minor compilation issue. #1296
  • Fix the name of wasmi_config_compilation_mode_set #1298
• Conditionally forward the string-interner/std crate feature. #1304
• Fix Wasmtime fuzzer oracle config usage. #1314

Changed

• Bumped minimum supported Rust version from v1.79 -> v1.80. #1318
• Replace the wasmparser-nostd fork with upstream wasmparser. #1141
  • This allows Wasmi to implement new Wasm proposals.
  • Unfortunately this update also regresses Wasmi translation performance
    by roughly 5-15% depending on the exact Wasm blob and translation mode.
• Update the string-interner and hashbrown dependencies. #1305

Internal

• Update the wast dependency for Wasmi's Wast runner. #1306
• Update wasm-tools dependencies to v0.221. #1318

v0.39.1 - 2024-11-06

Fixed

• Fixed a bug when translating double negations in expression contexts. #1293

v0.39.0 - 2024-11-04

Added

• Add new Linker APIs. #1281
  • Linker::instance: conveniently add exports from an instance to a linker.
  • Linker::alias_module: alias module definitions via another name.
  • Linker::allow_shadowing: enable to shadow previous definitions without errors.
• Add hash-collections and prefer-btree-collections crate features to the wasmi crate. #1265
  • This allows for more fine grained control over Wasmi
    dependencies to further decrease compile times.
• Add lowering of compare instructions and fused branch+compare instructions. #1243
  • This improved performance for certain workloads and
    reduced the total Wasmi instruction count significantly.
  • Wasm coremark results improved to 1830 (v0.39) from 1701 (v0.38).

Fixed

• Fixed a bug in translation of fused cmp+branch instructions with huge offsets.
  • This was fixed as a side product in #1243.

Removed

• Removed the no-hash-maps crate feature. #1265
• Removed some minor wasmi crate dependencies. #1266 #1267
  • This should improve compile times of the wasmi crate slightly.

Internal

• Modernize fuzzer and significantly improve fuzzing test coverage.
  • Reworked differential fuzzing entirely. #1257
    • This also improves handling of non-deterministic behavior
      between Wasm runtimes in differential fuzzing.
  • Add wasmi_fuzz crate for better code organization. #1252
  • Merged translate and translate_metered fuzzers. #1249
• Modernize Wasmi .wast directives runner. #1279
  • Overall this significantly improved readability and maintainability
    of the Wasmi .wast directives runner.

v0.36.5 - 2024-10-11

Fixed

• Fixed a bug with table.get translation when index is a preserved register. [#commit-b4e78d]

v0.38.0 - 2024-10-06

Added

• Add no-hash-maps crate feature to Wasmi CLI and enable it by default. #1225

Internal

• Rename various instructions and add ShiftAmount abstraction. #1221
• Use Rust's ControlFlow utility. #1223
• Use get_memory in load and store execution handlers. #1224

v0.37.2 - 2024-10-04

Added

• Added a new extra-checks crate feature to the wasmi crate. #1217

  • This improves unreachability checks in when debug-assertions or extra-checks are enabled.
  • If extra-checks are disabled, some technically unnecessary runtime checks are no longer performed.
  • Use extra-checks if your focus is on safety, disable if your focus is on performance.

Fixed

• Fixed a bug in local preservation when translating Wasm loop control flow. #1218

v0.36.4 - 2024-10-03

Fixed

• Fixed a bug in local preservation when translating Wasm loop control flow. [#1218]

v0.37.1 - 2024-10-01

Fixed

• Fixed a bug in select translation constant propagation. #1213

v0.36.3 - 2024-10-01

Fixed

• Fixed a bug in select translation constant propagation. #1213

v0.37.0 - 2024-09-30

Added

• Added support for Wasm multi-memory proposal. #1191
• Added Store::call_hook API. #1144
  • Contributed by emiltayl.

Changed

• Updated WASI dependencies. #1140
  • This fixes some long-standing bugs in the wasmi_wasi crate.

Fixed

• This release includes all fixes that have been backported to v0.36.1 and v0.36.2.

Internal

• Add new Wasmi bytecode. #1152
  • This was a major undertaking with lots of sub-issues and PRs.
  • The Wasmi bytecode definitions now reside in their own wasmi_ir crate.
  • Most of the definitions are sourced from a single Rust macro to reduce maintenance friction.
• Remove unnecessary iextend instructions. #1147
• Changed encoding for Wasmi call_indirect instructions. #1156
  • The new encoding improves performance and reduces the number of function local constants.
• Changed encoding for Wasmi select instructions. #1157
  • The new encoding is more straight-forward and aims to simplify the Wasmi executor and translator.
• Changed encoding for Wasmi br_table instruction. #1158
  • The new encoding improves performance and memory consumption for certain use cases.
• Minor improvements to Wasmi bytecode.
  • MemoryGrowBy now takes u32 delta. #1193
  • Improved storeN encoding with immediates. #1194