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Wasm (GraalWasm (GraalVM Implementation of WebAssembly) Changelog

This changelog summarizes major changes to the WebAssembly engine implemented in GraalVM (GraalWasm).

Version 21.3.0

  • (GR-32924) Added support for importing and exporting mutable globals to GraalWasm, as defined by the respective WebAssembly proposal: https://github.com/WebAssembly/mutable-global/blob/master/proposals/mutable-global/Overview.md
  • (GR-26941) Moved the module-validation checks to an earlier stage, so that the module is completely validated during parsing, instead of being validated late, during linking and instantiation. All validation errors are now properly reported when Context#eval from the Polyglot API is invoked, and similarly when invoking WebAssembly.validate from the JS-WebAssembly Interface API.
  • (GR-33183) Memory-access performance was improved by avoiding a branch due to a out-of-bounds check.
  • (GR-32714) Loop-profiling in GraalWasm was made more accurate to enable more loop optimizations.
  • (GR-33227) Changed the Interop objects in GraalWasm to allow object-caching in the JS-WebAssembly Interface: https://webassembly.github.io/spec/js-api/index.html#object-caches
  • (GR-32356) Fixed a bug that caused an overflow during memory or table initialization.
  • (GR-33296) Added notifications to JavaScript when the memory grows (i.e., when mem_grow instruction executes). This improves the compliance of the JS-WebAssembly Interface API.
  • (GR-33333) Added support for BigInt-to-i64 conversion in the JS-WebAssembly Interface API: https://github.com/WebAssembly/JS-BigInt-integration
  • (GR-32590) Improved internal implementation of GraalWasm to make JS-WebAssembly Interface API more compliant.