dev

Add ptest and vptest to the new assembler (#11139)

v34.0.1: Release Wasmtime 34.0.1 (#11119)

34.0.1

Released 2025-06-24.

Fixed

• Fix a panic with host-defined tables/globals and concrete reference
  types.
  #11103

v33.0.1: Release Wasmtime 33.0.1 (#11120)

33.0.1

Released 2025-06-24.

Fixed

• Fix a panic with host-defined tables/globals and concrete reference
  types.
  #11103

v32.0.1: Release Wasmtime 32.0.1 (#11118)

32.0.1

Released 2025-06-24.

Fixed

• Fix a panic with host-defined tables/globals and concrete reference
  types.
  #11103

v24.0.3: Release Wasmtime 24.0.3 (#11121)

24.0.3

Released 2025-06-24.

Fixed

• Fix a panic with host-defined tables/globals and concrete reference
  types.
  #11103

v34.0.0: Release Wasmtime 34.0.0 (#11085)

34.0.0

Released 2025-06-20.

Added

• Support for SIMD in the Pulley interpreter can now be disabled at compile-time
  to shrink the size of the final binary.
  #10727

• The C API now has wasmtime_trap_new_code to create a wasm_trap_t from
  its code.
  #10765

• Winch's support for x86_64 is now classified with tier 1 support in Wasmtime.
  #10755

• Winch's support for aarch64 now implements stack checks to pass many more spec
  tests.
  #10763

• Cranelift's s390x backend now has full support for the f128 type.
  #10774

• Wasmtime's C API for the component model has initial support for calling
  functions.
  #10697
  #10841
  #10858
  #10864
  #10877

• The wasmtime wast command now has a --generate-dwarf flag to show
  filename/line number information for backtraces.
  #10780

Changed

• The shape of bindgen!-generated add_to_linker functions has changed with
  the removal of GetHost and replacement of a HasData trait. For more
  information see the associated PR.
  #10770

• Wasmtime's Store<T> now requires that T: 'static. This is done in
  preparation for merging WASIp3 work to the main repository with some more
  information on the associated PR.
  #10760

• The wasmtime::component::Instance::instance_pre method is now public.
  #10761

• Wasmtime and Cranelift's minimnum supported version of Rust (MSRV) is now
  1.85.0.
  #10785

• Cranelift's debugtrap on aarch64 now generates brk #0xf000 for debuggers
  to recognize it.
  #10813

• The wasi-http implementation no longer generates a trap if the handle to
  receive the response on the host is dropped early.
  #10833

• The wasmtime serve command will now send some boilerplate descriptive HTML
  on a 500 server error instead of nothing.
  #10851

• A significant amount of work has gone into the new assembler for the x64
  backend. Too many PRs to list here but progress continues apace at defining
  all machine instructions in a standalone crate.

• Cranelift will now reject unimplemented big-endian loads/stores on backends
  that do not implement this functionality.
  #10863

• The wasmtime explore generated HTML handles large modules better now.
  #10892

• Wasmtime's internal representation of wasmtime::Func has changed and a
  previous optimization of Func::call has been lost. If affected it'd
  recommended to use Func::call_unchecked instead or to open an issue.
  #10897

v33.0.0: Release Wasmtime 33.0.0 (#10812)

33.0.0

Released 2025-05-20.

Added

• Cranelift now has initial support for try_call and try_call_indirect
  instructions, to be used in the future for the WebAssembly exception-handling
  proposal. Wasmtime does not yet implement this proposal yet.
  #10510
  #10557
  #10593

• Cranelift can now optimize some simple possibly-side-effectful instructions,
  such as division.
  #10524

• Wasmtime now supports --invoke for components using the WAVE format.
  #10054

• Initial support for the Component Model has landed in Wasmtime's C API. Note
  that the API is not yet feature-complete, however.
  #10566
  #10598
  #10651
  #10675

• Wasmtime's C++ API is now available from this repository and the
  bytecodealliance/wasmtime-cpp repository has been archived. Additionally the
  monolithic wasmtime.hh header file has been split into separate header
  files.
  #10582
  #10600

• Wasmtime's cookbook-style documentation has been expanded.
  #10630

• Wasmtime's now supports custom yield behavior when using epoch interrupts.
  #10671

Changed

• Wasmtime's bindgen now type-checks export functions in the constructor of
  the generated {Worldname}Pre or {Worldname} structs, rather than at the
  call of the export function.
  #10610

• Wasmtime's component::Component and component::Instance now have consistient
  get_export and get_export_index methods, which return (ComponentItem, ComponentExportIndex) and ComponentExportIndex, respectively.
  #10597

• On failure, wasmtime serve gives an internal server error response, rather
  than closing the connection.
  #10645

• Cranelift's single-pass allocator has been disabled due to being unable to
  support internal refactorings in preparation for the WebAssembly exceptions
  proposal. Re-enabling this allocator is tracked at
  regalloc2#217 for
  those interested.
  #10554

• Wasmtime's {Array,Extern,Struct}Ref functions will now automatically trigger
  a GC.
  #10560

• Wasmtime's GC heaps now use the same translation techniques as linear memories
  meaning they have far fewer bounds-checks than before.
  #10503

• Wasmtime's implementation of WASIp2 has moved to wasmtime_wasi::p2 from the
  root of the crate.
  #10073

• Wasmtime will no longer emit calls to Cranelift-defined "libcalls" and instead
  everything goes through Wasmtime's libcall mechanism instead, paving the way
  for a future change for more efficient stack limit checking in wasm. This can
  also improve deserialize-from-disk times and improve page cache usage for
  modules that use libcalls as relocations are no longer necessary.
  #10657

• Configuration of caching can now be done through an API instead of exclusively
  through a configuration file. Additionally cache-related APIs in Config have
  changed.
  #10665

• Resources in the Component Model are now stored in a single table per-instance
  instead of per-type tables. Guests will see a different pattern of index
  allocation but this is not expected to cause any issues at runtime.
  #10701

Fixed

• Some math intrinsics have been fixed when compiled by Rust 1.87+.
  #10534

• Component model libcalls correctly handle platform-specific argument extension
  in ABIs.
  #10540

• An off-by-one issue with DWARF debuginfo has been fixed.
  #10570

• The Config::target method is no longer gated by a #[cfg] for an enabled
  compiler, it can be used when only the runtime feature is available.
  #10618

• An issue with "simulated" DWARF has been fixed.
  #10681

• C/C++ headers are now tested that they can be included in isolation, and a
  number of issues have been fixed.
  #10694

v32.0.0: Release Wasmtime 32.0.0 (#10617)

32.0.0

Released 2025-04-21.

Added

• {Module,Component}::deserialize_raw can now be used to deserialize an
  in-memory module while relying on external management of the memory.
  #10321

• An initial implementation of wasi-tls has been added.
  #10249

• The wasmtime CLI now supports hexadecimal integer CLI arguments.
  #10360

• Cranelift now supports a log2_min_function_alignment flag.
  #10391

• A new wasmtime objdump subcommand has been added to help explore and debug
  *.cwasm files.
  #10405

• Support for the pooling allocator has been added to the C API.
  #10484

• Support for the guest profiler with the component model has been added.
  #10507

Changed

• Cranelift MemFlags now has a can_move flag which restricts whether a load
  or store can be moved.
  #10340

• The .text size of Pulley *.cwasm files should be smaller with less
  padding.
  #10285

• The wasmtime serve subcommand now implements a graceful shutdown on ctrl-c.
  #10394

• Stack maps used for GC are now stored in a serialized binary format that is
  faster to deserialize.
  #10404

• The aegraph implementation in Cranelift has been simplified to remove the
  union-find and canonical eclass IDs.
  #10471

• The store_list and load_list helpers have been specialized in components
  for f32 and f64.
  #9892

• Cranelift now removes block params on critical-edge blocks.
  #10485

• The Linker::define_unknown_imports_as_default_values API now supports
  defining defaults for more kinds of items.
  #10500

• Wasmtime now requires Rust 1.84.0 to compile.
  #10520

Fixed

• Winch compilation of extadd instructions has been fixed.
  #10337

• Fix an issue with DRC collector's barriers.
  #10371

• Loads on (ref null none) that can trap are now performed.
  #10372

• Fix reference count management in AnyRef::from_raw.
  #10374

• An issue with multi-value returns in Winch has been fixed.
  #10370

• A panic at compile-time from an overflowing shift has been fixed when
  targeting aarch64.
  #10382

• The wasmtime serve command no longer panics when handle returns before
  calling set.
  #10387

• Winch compilation of replace_lane instructions with floats has been fixed.
  #10393

• An invalid integer-shift optimization on vector types has been removed.
  #10413

• The DWARF loclist to exprloc optimization has been fixed.
  #10400

• Objects in the DRC collector are now transitively dec-ref's when collected.
  #10401

• A bug with GC rec gropus and registration in an Engine has been fixed.
  #10435

• A bug related to GC arrays of GC refs misreported their count of GC edges has
  been fixed.
  #10453

• A bug related to appropriately adding stack maps for all GC variables has been
  fixed.
  #10456
  #10468

• A bug with array.fill has been fixed.
  #10470

• GC structs are no longer reordered to optimize their size to fix subtyping.
  #10463

• Panics related to exceptions and components being mixed has been fixed.
  #10473

• Winch stack parameter alignment has been fixed.
  #10513

• Rendering inline function frames in a trap backtrace has been fixed.
  #10523

v31.0.0: Release Wasmtime 31.0.0 (#10428)

31.0.0

Released 2025-03-20.

Added

• Winch's implementation of the SIMD proposal for WebAssembly is now
  feature-complete (but still being fuzzed).
  #10180
  #10170
  #10203
  #10202
  #10210
  #10213
  #10224
  #10205
  #10226
  #10228
  #10236
  #10241
  #10243
  #10247
  #10271
  #10284
  #10288
  #10296

• The pytorch implementation in wasmtime-wasi-nn now has GPU support.
  #10204

• Cranelift now supports emitting the AArch64 extr instruction.
  #10229

• Cranelift now supports emitting the x64 shld instruction.
  #10233

• Initial support for the stack-switching proposal has started to land, but it
  is not complete just yet.
  #10251
  #10265
  #10255

Changed

• Pulley's implementation of loads/stores to linear memory has changed to
  better support optimizations and reduction of interpreter opcodes in the
  final binary.
  #10154

• Cranelift's verifier now ensures that integers used as address types have the
  correct width.
  #10209

• Wasmtime and Cranelift's minimum supported version of Rust is now 1.83.0.
  #10264

• Wasmtime now mentions the filename when the input cannot be opened on the CLI.
  #10292

• All types are now generated in component::bindgen!, even if they're not
  reachable.
  #10311

• Tables allocated with the system allocator now use alloc_zeroed (aka
  calloc) for allocation.
  #10313

Fixed

• GC: the is-null-or-i31ref checks have been fixed.
  #10221

• GC: an incorrect assertion and canonicalized types for runtime usage has been
  fixed.
  #10223

• GC: subtype checks for imported globals during instantiation have been fixed.
  #10304

• GC: exposing references to wasm in the gc_alloc_raw libcall has been fixed.
  #10322

• Winch's fuel checks correctly sync fuel before the check now.
  #10231

• Winch's treatment of stores and other trapping ops has been fixed on AArch64.
  #10201

• Winch's handling of the shadow stack pointer has been fixed on AArch64.
  #10263

• Winch's handling of address calculations has been fixed on AArch64.
  #10297

• Winch's handling of multivalue return of constants has ben fixed.
  #10315

v30.0.2: Release Wasmtime 30.0.2 (#10294)

30.0.2

Released 2025-02-25.

Fixed

• MinGW C API builds are now built with a newer version of GCC which seems to
  fix an issue caused by #9929.
  #10290

Changed

• The cranelift-codegen crate now no longer depends on arbitrary, a
  now-unnecessary dependency.
  #10217