v18.0.1: Release Wasmtime 18.0.1 (#7967)

18.0.1

Released 2024-02-20.

Fixed

• Fixed a mistake in the CI release process that caused the crates.io
  publication of the 18.0.0 release to not succeed.
  #7966

v18.0.0: Release Wasmtime 18.0.0 (#7958)

18.0.0

Released 2024-02-20.

Added

• The wasmtime-c-api-impl crate is now published on crates.io.
  #7837

• A new EngineWeak type enables holding a weak pointer to an engine with the
  ability to dynamically and fallibly upgrade it to an Engine.
  #7797

• The WebAssembly tail calls proposal can now be enabled through the C API.
  #7811

• The import and export types of a Component can now be inspected at runtime.
  #7804

• New APIs/types have been added to support a faster version of looking up
  module exports without using string lookups with Module::get_export_index.
  #7828

Changed

• Owned resources represented with ResourceAny can now be passed as arguments
  to functions that require a borrow<T> parameter.
  #7783

• Generated structures from wasmtime::component::bindgen! for exported
  interfaces are now all renamed to Guest to avoid conflicting with WIT names.
  #7794

• Guest profiler output will now automatically demangle symbols.
  #7809

• The wasmtime crate now has a runtime Cargo feature which, if disabled,
  enables building Wasmtime with only the ability to compile WebAssembly
  modules. This enables compiling Wasmtime's compilation infrastructure, for
  example, to WebAssembly itself.
  #7766

• Support for the old wasi-common crate and the original implementation of
  "WASIp1" aka "preview1" is being deprecated in the wasmtime-wasi crate.
  Users should migrate to the wasmtime_wasi::preview2 implementation, which
  supports both WASIp1 and WASIp2, as in the next release the
  wasi-common-based reexports of wasmtime-wasi will be deleted.
  #7881

v17.0.1: Release Wasmtime 17.0.1 (#7890)

17.0.1

Fixed

• Fix an egraph elaboration fuzzbug that was allowing values with dependencies
  that shouldn't be duplicated to be chosen in a context that would make them
  invalid.
  #7859
  #7879
• Fix an egraph rule bug that was allowing unconstrained recursion through the
  DFG to run away on large functions.
  #7882

v17.0.0: Release Wasmtime 17.0.0 (#7800)

17.0.0

Released 2024-01-25

The major feature of this release is that the WASI support in Wasmtime is now
considered stable and flagged at an 0.2.0 version approved by the WASI subgroup.
The release was delayed a few days to hold off until the WASI subgroup voted to
approve the CLI and HTTP worlds and they're now on-by-default! Additionally the
component model is now enabled by default in Wasmtime, for example an opt-in
flag is no longer required on the CLI. Note that embeddings still must opt-in to
using the component model by using the wasmtime::component module.

Added

• Cranelift optimizations have been added for "3-way comparisons", or Ord::cmp
  in Rust or <=> in C++.
  #7636
  #7702

• Components now use Wasmtime's compilation cache used for core wasm modules by
  default.
  #7649

• The Resource<T> and ResourceAny types can now be converted between each
  other.
  #7649
  #7712

Changed

• Minor changes have been made to a number of WITs as they progressed to their
  official 0.2.0 status.
  #7625
  #7640
  #7690
  #7781
  #7817

• The component model is now enabled by default.
  #7821

• The implementation of memory.atomic.{wait,notify} has been rewritten.
  #7629

• The wasmtime_wasi::preview2::Table type has been moved to
  wasmtime::component::ResourceTable.
  #7655

• Creating a UDP stream now validates the address being sent to.
  #7648

• Defining resource types in Linker<T> now takes the type to define as a
  runtime parameter.
  #7680

• Socket address checks can now be performed dynamically at runtime.
  #7662

• Wasmtime and Cranelift's MSRV is now 1.73.0.
  #7739

Fixed

• Bindings for WIT APIs where interfaces have multiple versions are now fixed by
  putting the version in the generated binding names.
  #7656

• The preview1 fd_{read,write} APIs are now fixed when a shared memory is
  used.
  #7755

• The preview1 fd_{read,write} APIs no longer leak an intermediate stream
  created.
  #7819

v16.0.0: Release Wasmtime 16.0.0 (#7709)

16.0.0

Released 2023-12-20.

Added

• Add yielding support in wasmtime_store_epoch_deadline_callback in the C API.
  #7476

• Support for the wasi_unstable module ("wasi preview0" canonically) has been
  added to the -Spreview2 support in the CLI.
  #7548

• The original module can now be obtained from an "instance pre" in the C API.
  #7572

• Usage of Mach ports on macOS can now be disabled in the C API.
  #7595

Changed

• The preview1-to-preview2 component adapters now import a smaller number of
  interfaces by default.
  #7543
  #7544

• Wasmtime and Cranelift now require Rust 1.72.0 to build.
  #7554

• The default world supported by wasmtime serve has been slimmed down to
  exactly what wasi:http/proxy specifies by default. Support for other WASI
  APIs can be included with the -S common command-line flag.
  #7597

• The wasmtime --version CLI output will now include date/commit information
  when Wasmtime is built from a git checkout.
  #7610

Fixed

• MPK support is now explicitly disabled on AMD-based CPUs since the
  implementation does not currently support it.
  #7513

• Initialization of a WebAssembly data segment with a negative offset is fixed
  to zero-extend the offset instead of sign-extend.
  #7559

• The reported offset of O_APPEND files in preview1 has been fixed.
  #7586

• MPK support does a better job of compacting memories to minimize virtual
  memory used.
  #7622

Cranelift

• Union node bitpacking has been fixed with egraph optimizations to ensure the
  minimal cost node is selected.
  #7465

• Equivalent-cost expressions now have ties broken with expression depth in
  egraphs to prefer "shallow" expression trees.
  #7456

• Long-and-narrow chains of expressions are now optimized into shallow-and-wide
  trees.
  #7466

v15.0.1: Release Wasmtime 15.0.1 (#7619)

15.0.1

Released 2023-12-01.

Fixed

• The wasi:random/insecure{,_seed} interfaces are now available through the
  CLI.
  #7614

• A stray debugging println! was removed.
  #7618

v15.0.0: Release Wasmtime 15.0.0 (#7557)

15.0.0

Released 2023-11-20.

Added

• Multiple versions of interfaces are now supported in bindgen!.
  #7172

• UDP has been implemented in wasi:sockets.
  #7148
  #7243

• Support for custom stack memory allocation has been added.
  #7209

• The memory_init_cow setting can now be configured in the C API.
  #7227

• The splice method of WASI streams has been implemented.
  #7234

• Wasmtime binary releases now have a wasmtime-min executable in addition to
  libwasmtime-min.* libraries for the C API. These showcase a minimal
  build of Wasmtime for comparison.
  #7282
  #7315
  #7350

Changed

• Many changes to wasi:http WITs have happened to keep up with the proposal as
  it prepares to reach a more stable status.
  #7161
  #7406
  #7383
  #7417
  #7451

• Add an error resource to WASI streams.
  #7152

• Syntax in bindgen!'s trappable_error_type configuration has changed.
  #7170

• TCP errors in wasi:sockets have been simplified and clarified.
  #7120

• Wasmtime/Cranelift now require Rust 1.71.0 to compile.
  #7206

• Logging in Wasmtime is now configured with WASMTIME_LOG instead of
  RUST_LOG.
  #7239

• Fuel-related APIs on Store have been refactored and reimplemented with two
  new methods set_fuel and reset_fuel. Previous methods have been removed.
  #7240
  #7298

• The forward method of WASI streams has been removed.
  #7234

• The WebAssembly threads, multi-memory, and relaxed-simd proposals are
  now enabled by default.
  #7285

• Logging is now implemented for wasmtime serve.
  #7366

• Filesystem locking has been temporarily removed from WASI.
  #7355

• Wasmtime's implementation of WASI preview1 built on top of preview2
  (-Spreview2) has been enabled by default.
  #7365

• The wasi:clocks interface now has two subscribe functions and a duration
  type.
  #7358

• The wasi:io/poll interface has seen some refactoring.
  #7427

Fixed

• Profiling the first function in a module now works.
  #7254

• Consecutive writes to files in preview2 have been fixed.
  #7394

• Copy-on-write initialization of linear memories has been fixed for components.
  #7459

Cranelift

• Support for proof-carrying code has been added to Cranelift to assist with an
  extra layer of validation about properties such as WebAssembly memory accesses
  in the future.
  #7165
  #7180
  #7219
  #7231
  #7262
  #7263
  #7274
  #7280
  #7281
  #7352
  #7389
  #7468

• Rematerialization of values no longer accidentally overrides LICM.
  #7306

• Inline stack probes no longer make Valgrind unhappy.
  #7470

v14.0.4: Release Wasmtime 14.0.4 (#7431)

14.0.4

Released 2023-11-01

Fixed

• Using the --dir argument combined with a ::-remapped path no longer prints
  a warning about compatibility with the old CLI and works with remapping.
  #7416

• Consecutive file writes in preview2 have been fixed.
  #7394

v14.0.3: Release Wasmtime 14.0.3 (#7399)

14.0.3

Released 2023-10-29

Fixed

• The wasmtime executable will now attempt to more gracefully handle the
  transition from the 13.0.0 CLI arguments and parsing to the changes in 14.0.0.
  CLI commands should now warn if they no longer work with the new parser, but
  still execute as they previously did. This behavior can be controlled via a
  new WASMTIME_NEW_CLI environment variable if necessary.
  #7385

• The serve subcommand of the wasmtime CLI is now enabled by default for the
  wasmtime executable.
  #7392

v14.0.2: Release Wasmtime 14.0.2 (#7367)

14.0.2

Released 2023-10-26

Fixed

• Make the wasmtime::unix module accessible on macOS again.
  #7360

• Inter-crate dependencies between cranelift-* crates now disable the
  default feature meaning that it's possible for embedders to depend on
  cranelift-codegen as well without the default feature.
  #7369