bytecodealliance/wasmtime v19.0.0

on GitHub

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