dev

x64: rework new assembler rule priorities, remove old emission rules …

v30.0.1: Release Wasmtime 30.0.1 (#10272)

30.0.1

Released 2025-02-21.

Fixed

• Fixes an issue building the cranelift-assembler-x64 crate on Windows
  when the Rust toolchain is on a different drive than the project using
  wasmtime. For more details, see the Zulip discussion. #10270

v30.0.0: Release Wasmtime 30.0.0 (#10250)

30.0.0

Released 2025-02-20.

Added

• New wasmtime-wasi-io crate provides a #![no_std] wasi:io implementation,
  factored out of wasmtime-wasi. Users of wasmtime-wasi don't have to
  depend on this new crate.
  #10036

• Wasmtime's interpreter, Pulley, is now complete and has been listed as
  tier 2.
  #9897
  #9884
  #9943
  #9944
  #9983
  #9966
  #9935
  #10034
  #10057
  #10095

• Wasmtime's CI now checks that the repository builds for aarch64-apple-ios.
  Note that no tests are run for this target, so it's still tier 3.
  #9888

• Winch's support for AArch64 and simd on x64 have continued to progress
  well. Winch additionally now fully supports the threads WebAssembly
  proposal.
  #9889
  #9970
  #9950
  #9987
  #9990
  #9959
  #10008
  #10028
  #10029
  #10023
  #10042
  #10050
  #10039
  #10082
  #10092
  #10109
  #10148
  #10147

• The memory64 WebAssembly feature is now enabled by default. This WebAssembly
  proposal is now considered a tier 1 feature.
  #9937
  #10159

• Wasmtime's full test suite and CI now includes 32-bit platforms such as x86
  and armv7 Linux. These platforms have been added to tier 3 status and use
  Pulley as their execution backend.
  #10025

• Initial experimental support for WASIp3 and async features of the Component
  Model have started to land. These features are not yet ready for
  general-purpose use.
  #10044
  #10047
  #10083
  #10103

• The wasmtime CLI now supports using a TOML configuration file via --config
  in addition to CLI options.
  #9811
  #10132

• Initial support for a new assembler on x64 has been added.
  #10110
  #10178

Changed

• wasmtime-wasi split the WasiView trait into IoView and WasiView, and
  wasmtime-wasi-http re-uses IoView in WasiHttpView. Details on porting
  for embedders in PR.
  #10016

• wasmtime-wasi renamed some exported types and traits. Embedders which use
  Pollable, InputStream, OutputStream, Subscribe, HostInputStream,
  HostOutputStream, PollableFuture, or ClosureFuture from that crate
  will need to rename those imports to their new names, describe in PR.
  #10036

• Components using a 64-bit linear memory should never have worked before, but
  they're now rejected earlier in the validation process.
  #9952

• Module validation is now deterministic in the face of multiple errors.
  #9947

• Wasmtime's minimum supported version of Rust is now 1.82.0.
  #9956

• Cranelift will now deduplicate trap[n]z instructions.
  #10004

• The --emit-clif option to wasmtime compile now emits post-optimization
  CLIF.
  #10011

• The signals-based-traps Cargo feature has been removed in favor of
  auto-detection of available features based on the #[cfg] directives
  available for the target platform.
  #9941

• The async_stack_zeroing configuration knob now covers all stack allocations,
  not just those from the pooling allocator.
  #10027

• Wasmtime should work-by-default on more platforms, even those where Cranelift
  has no support for the architecture. This is done by ensuring some
  architecture and platform-specific bits are removed on unknown platforms (and
  Pulley is used instead).
  #10107

• Wasmtime now compiles on platforms missing 64-bit atomics.
  #10134

Fixed

• Fixed a missing case for Ref::matches_ty should return true.
  #9985

• A bug with using the single_pass register allocation algorithm on x64/s390x
  has been fixed by refactoring how branches are represented.
  #10086
  #10087

• A bug with argument extensions on riscv64 has been fixed.
  #10069

• The PartialEq implementation for RegisteredType has been fixed.
  #10091

• The output of component::bindgen! now works with #![no_std] crates.
  #10105

• Fix wasmtime wast when combined with --fuel.
  #10121

• The wat feature of the C API is now plumbed correctly in a few more
  locations.
  #10124

• Spurious wake-ups in blocking_* methods of InputStream and OutputStream
  have been fixed.
  #10113

v29.0.1: Release Wasmtime 29.0.1 (#10070)

29.0.1

Released 2025-01-21.

Fixed

• Fix a missing increment in WASIp1-to-WASIp2 adapter which affected WASI
  configurations that have multiple preopened directories.
  #10064

v29.0.0: Release Wasmtime 29.0.0 (#10049)

29.0.0

Released 2025-01-20.

Added

• Winch now supports epoch-based interruption.
  #9737

• Pulley, Wasmtime's WebAssembly interpreter, has seen quite a lot of progress
  and support fleshed out. It's still not 100% complete but should be about
  ready to start kicking the tires.
  #9744

• The Wasmtime CLI now supports a -Wextended-const flag to control whether the
  extended-const wasm proposal is enabled or not.
  #9768

• Work continues to progress on the AArch64 Winch backend, bringing it closer to
  completion.
  #9762
  #9767
  #9751
  #9784
  #9781
  #9792
  #9787
  #9798
  #9850

• Wasmtime now supports a "custom code publisher" which can be useful when
  Wasmtime doesn't have built-in support for a particular environment.
  #9778

• Configuration options have been added for wasmtime-wasi-http outgoing
  bodies.
  #9800

• Log prefixes can now be disabled for the wasmtime serve command.
  #9821

• A new WASMTIME_LOG_NO_CONTEXT environment variable was added to live
  alongside WASMTIME_LOG.
  #9902

• Release artifacts for aarch64-musl targets are now available.
  #9934

Changed

• Wasmtime libcalls now return whether a trap happened rather than raising a
  trap directly to better prepare for the Pulley interpreter and an eventual
  implementation of Wasm exception-handling.
  #9710

• Wasmtime will now use the Pulley interpreter by default on platforms that
  are not supported by Cranelift.
  #9741

• Demangling symbols in profiling and debugging has improved to handle failures
  to demangle C++ symbols.
  #9756

• WASI WIT files have been updated to 0.2.3.
  #9807

• Wasmtime's bindgen! macro in async mode no longer uses #[async_trait]
  an instead natively uses async fn in traits.
  #9867

• Floats are no longer canonicalized flowing into or out of components.
  #9879

• Instance methods are now translated to static methods in DWARF translation.
  #9898

• The C API now supports debug builtins for debugging guest code.
  #9915

Fixed

• The header file for wasmtime_instance_pre_instantiate in the C API has been
  fixed.
  #9770

• WebAssembly DWARF is more conservative in its GC pass during translation to
  native DWARF.
  #9829

• Debugging intrinsics are fixed on Linux to be exported now.
  #9866

v28.0.1: Release Wasmtime 28.0.1 (#10015)

28.0.1

Released 2025-01-14.

Fixed

• Fixed deallocating async stacks when using Store::into_data.
  #10009

v28.0.0: Release Wasmtime 28.0.0 (#9876)

28.0.0

Released 2024-12-20.

Added

• The ISLE DSL used for Cranelift now has a first-class bool type.
  #9593

• Cranelift now supports a new single-pass register allocator designed for
  compile-time performance (unlike the current default which is optimized for
  runtime-of-generated-code performance).
  #9611

• The wasmtime crate now natively supports the wasm-wave crate and its
  encoding of component value types.
  #8872

• A Module can now be created from an already-open file.
  #9571

• A new default-enabled crate feature, signals-based-traps, has been added to
  the wasmtime crate. When disabled then runtime signal handling is not
  required by the host. This is intended to help with future effort to port
  Wasmtime to more platforms.
  #9614

• Linear memories may now be backed by malloc in certain conditions when guard
  pages are disabled, for example.
  #9614
  #9634

• Wasmtime's async feature no longer requires std.
  #9689

• The buffer and budget capacity of OutgoingBody in wasmtime-wasi-http are
  now configurable.
  #9670

Changed

• Wasmtime's external and internal distinction of "static" and "dynamic"
  memories has been refactored and reworded. All options are preserved but
  exported under different names with improved documentation about how they all
  interact with one another. (and everything should be easier to understand)
  #9545

• Each Store<T> now caches a single fiber stack in async mode to avoid
  allocating/deallocating if the store is used multiple times.
  #9604

• Linear memories now have a 32MiB guard region at the end instead of a 2GiB
  guard region by default.
  #9606

• Wasmtime will no longer validate dependencies between WebAssembly features,
  instead delegating this work to wasmparser's validator.
  #9623

• Cranelift's isle-in-source-tree feature has been re-worked as an environment
  variable.
  #9633

• Wasmtime's minimum supported Rust version is now 1.81.
  #9692

• Synthetic types in DWARF are now more efficiently represented.
  #9700

• Debug builtins on Windows are now exported correctly.
  #9706

• Documentation on Config now clarifies that defaults of some options may
  differ depending on the selected target or compiler depending on features
  supported.
  #9705

• Wasmtime's error-related types now all unconditionally implement the Error
  trait, even in #[no_std] mode.
  #9702

Fixed

• Field type matching for subtyping with wasm GC has been fixed.
  #9724

• Native unwind info generated for s390x has been fixed in the face of tail
  calls.
  #9725

v27.0.0: Release Wasmtime 27.0.0 (#9624)

27.0.0

Released 2024-11-20.

Added

• Support for the Wasm GC proposal is now complete. A new "null" GC has been
  also added which does not ever collect garbage.
  #9389
  #9392
  #9401
  #9435
  #9437
  #9438
  #9446
  #9448
  #9454
  #9455
  #9484

• Unstable WIT APIs now have feature gates configured at link-time and new
  -Scli-exit-with-code / -Snetwork-error-code options are available as well.
  #9381
  #9276

• Initial support for the wide-arithmetic proposal has been implemented.
  #9403
  #9500

• Guests on s390x now implement the "inline probestacks" for Cranelift to more
  robustly detect stack overflows.
  #9423

• Missing CLI options for the pooling allocator have been filled out.
  #9447

• Cranelift now supports 128-bit atomics on x64.
  #9459

• A new Cargo feature has been added to the wasmtime crate to reexport the
  wasmparser dependency.
  #9485

• Support for a new PyTorch backend for wasi-nn has been added.
  #9234

• A new -Cnative-unwind-info flag has been added to the wasmtime CLI.
  #9494

• Initial support for illumos has been added.
  #9535

• A new Caller::get_module_export API has been added.
  #9525

• Basic debug logging has been added to the debug info transformatino.
  #9526

Changed

• The WASI WITs vendored are now updated to 0.2.2.
  #9395

• The wasmtime-wasi-runtime-config is now named wasmtime-wasi-config.
  #9404

• Documentation on the implementation status of WebAssembly proposals has been
  updated.
  #9434

• Wasmtime's WASI documentation has been overhauled.
  #9471

• The wasi_config_preopen_dir in Wasmtime's C API now takes file/directory
  permissions.
  #9477

• Detection of libunwind vs libgcc is now done with weak symbols.
  #9479

• Winch has improved detection of unsupported features in a Config.
  #9490

• Winch now supports fuel-based interruption.
  #9472

• Wasmtime's minimum supported Rust version is now 1.80.
  #9496

• ISLE no longer supports scheme-style booleans.
  #9522

• ISLE now supports block comments.
  #9529

• Support for shared memory in the C API has been added.
  #9507

• Configuration options for guard size regions have been merged into a single
  option.
  #9528

Fixed

• Double-registration of debug information for modules in components has been
  fixed.
  #9470

• A panic on AArch64 for vector constants has been fixed.
  #9482

• A miscompile with sdiv and INT_MIN / -1 has been fixed on aarch64.
  #9541

v26.0.1: Release Wasmtime 26.0.1 (#9561)

26.0.1

Released 2024-11-05.

Fixed

• Update to cap-std 3.4.1, for #9559, which fixes a wasi-filesystem sandbox
  escape on Windows.
  CVE-2024-51745.

v25.0.3: Release Wasmtime 25.0.3 (#9562)

25.0.3

Released 2024-11-05.

Fixed

• Update to cap-std 3.4.1, for #9559, which fixes a wasi-filesystem sandbox
  escape on Windows.
  CVE-2024-51745.