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v19.0.0: Release Wasmtime 19.0.0 (#8186)
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@github-actions github-actions released this 20 Mar 15:15
· 627 commits to main since this release
v19.0.0
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19.0.0

Released 2024-03-20.

Added

  • C API bindings for the sampling-based profiler in Wasmtime have been added.
    #7854

  • Add the WasiP1Ctx to ease the use of wasmtime-wasi in place of wasi-common
    #8053

  • The Winch compiler backend is now feature-complete for x64. Note that minor
    issues and fuzz bugs are still being addressed, but now's a good time to test
    if you're interested.
    #7894
    #7909
    #7927
    #7932
    #7949
    #7974
    #8001

  • The typed function references proposal to WebAssembly is now fully
    implemented.
    #7943

  • The component::Linker type is now "semver aware" in that it enables loading
    components referring to past or future versions of interfaces so long as the
    types are compatible.
    #7994

  • Wasmtime can now be built for "custom platforms" which is intended for
    bare-metal builds.
    #7995

  • The wasmtime-wasi-nn crate now has a backend based on WinML.
    #7807

  • The wasmtime CLI now has flags for configuring limits of the pooling
    allocator.
    #8027

Changed

  • The wasmtime serve command no longer binds its port with SO_REUSEADDR
    meaning that if it is invoked twice only one will succeed.
    #7863

  • The sampling-based profiler in Wasmtime now takes an explicit argument of
    the time delta between samples.
    #7873

  • Many accessors for type information now require an &Engine argument to be
    specified in preparation for an implementation of wasm GC.
    #7892

  • The host header is now forbidden in wasi-http.
    #7905

  • Stronger type-checks are now performed for host-owned resources when
    interacting with the component model to help catch mistakes earlier.
    #7902

  • Demangling Rust and C/C++ symbols in WebAssembly modules is now done by
    default in the C API.
    #7962

  • Preview2-based APIs are now located at the root of the wasmtime_wasi crate
    instead of a submodule.
    #7933

  • Components now reserve index 0 for handle tables to match the component model
    specification.
    #7661

  • Support for externref has been moved behind a new gc Cargo feature. This
    will also gate support for wasm gc in the future.
    #7975

  • Require the WASMTIME_WASI_CONFIG_PREOPEN_SOCKET_ALLOW environment variable
    to bet set to allow the use of wasi_config_preopen_socket via the c api, as
    it will be deprecated in 20.0.0.
    #8053

Fixed

  • WIT interface names that are Rust keywords now correctly generate bindings.
    #7790

  • PKRU state is now restored across await points.
    #7789

  • Wasmtime now correctly supports global.get in all constant expressions
    within a module.
    #7996

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