bytecodealliance/wasmtime v22.0.0

on GitHub

22.0.0

Released 2024-06-20.

Added

• The CMake-based build of Wasmtime's C API now adds a
  WASMTIME_FASTEST_RUNTIME option which activates the "fastest-runtime"
  compilation profile which enables LTO.
  #8554

• Cranelift supports more instructions in the RISC-V Zfa and ZiCond extensions.
  #8582
  #8695

• Support for fused-multiply-and-add on RISC-V has been improved.
  #8596
  #8588

• Release binaries for {aarch64,x86_64}-android have been added. Note that
  Android is still a Tier 3 target.
  #8601

• Wasmtime now supports supertypes and finality in the type hierarchy for wasm
  gc.
  #8595

• Lazy initialization of tables can now be tuned with a CLI flags and
  configuration option.
  #8531

• Wasmtime now compiles for x86_64 OpenBSD. Note that this is a Tier 3
  target and continued support is always appreciated.
  #8613

• Stack slots in Cranelift can now specify custom alignment.
  #8635

• Wasm function names are now used in compiled objects to assist with debugging
  and introspection with native tools.
  #8627

• Wasmtime's release artifacts now includes wasmtime-platform.h for use with
  no_std targets.
  #8644

• Release binaries for x86_64 Alpine Linux have been added.
  #8668

• A new Component::define_unknown_imports_as_traps function has been added to
  stub out functions in a component linker.
  #8672

Changed

• Wasmtime and Cranelift's now require Rust 1.76.0 to build.
  #8560

• The wasi_config_preopen_dir function no longer always returns true in the
  C API. Additionally wasi_config_set_env and wasi_config_set_argv may now
  return an error.
  #8572

• Cranelift now updates registers of backend instructions in-place, simplifying
  register allocation and assignment.
  #8566
  #8581
  #8592
  #8604
  #8605

• Wasmtime now attempts to batch memory decommits into one tight loop.
  #8581
  #8590

• Bindings generated with bindgen! now have generated GetHost traits and
  add_to_linker_get_host functions which enable a more general means by which
  to acquire host implementations from a store's T.
  #8448

• The wasmtime serve subcommand will now dynamically determine whether to use
  the pooling allocator by default based on the system's available virtual
  memory.
  #8610

• Implementations of Host traits in the wasmtime-wasi crate are now for
  WasiImpl<T> instead of blanket impls for T.
  #8609
  #8766

• The concepts of "virtual sp offset" and "nominal sp" have been removed from all
  Cranelift backends.
  #8631
  #8643

• The maximum size of linear memory in the pooling allocator is now specified in
  bytes instead of pages.
  #8628

• Wasmtime no longer has two different host ABIs for host functions and instead
  only has one. The "array" calling convention is now unconditionally used
  instead of having a split between the "native" calling convention and the
  "array" calling convention. This means that Func::new is now available even
  when the cranelift feature is disabled.
  #8629
  #8646

• Wasmtime's C API bindings for CMake have been refactored and now supports
  specifying Cargo features directly. Functions that are configured out are now
  also gated in header files.
  #8642

• Wasmtime's C API can now be built without Cranelift or Winch.
  #8661

• Wasmtime's release binaries have Winch compiled in by default now.
  #8660

• The output of wasmtime explore now shows function names in addition to
  indices.
  #8639

• Support for the Wasmtime 13-and-prior CLI has been removed.
  #8597

• Wiggle-based borrow checking has been removed in favor of modeling host usage
  of guest memory with Rust-level borrows.
  #8702

• Wasmtime's bindgen! macro will now generate the same hierarchy of
  traits/types/modules even when the with module is used via new pub use
  statements.
  #8721

• The WasiCtxBuilder::socket_addr_check function now takes an async closure.
  #8715

• The Func::wrapN_async functions and friends have all been consolidated into
  a single function with a slightly different signature of taking a tuple of
  arguments rather than "splatted" arguments.
  #8732

Fixed

• Trampoline lookup for wasm gc functions that may use subtyping on the host to
  match a guest's desired type now no longer panics.
  #8579

• The total size of arguments, environment variables, and preopens is now
  allowed to exceed 64k when using the wasip1 component adapter.
  #8594

• Performing a zero-length read on file streams is now fixed in WASI.
  #8611

• Tail calls are now turned by default after a mistake was discovered in the
  previous releases's intent to enable them by default.
  #8682

• Winch support for f64 comparison instructions has been fixed.
  #8685

• The SO_REUSEADDR option is reenabled for Unix platforms with wasmtime serve.
  #8738