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# Wasmtime Releases
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--------------------------------------------------------------------------------
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## 0.13.0
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Unreleased
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### Added
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* Lots of documentation of `wasmtime` has been updated. Be sure to check out the
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[book](https://bytecodealliance.github.io/wasmtime/) and [API
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documentation](https://bytecodealliance.github.io/wasmtime/api/wasmtime/)!
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* All wasmtime example programs are now in a top-level `examples` directory and
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are available in both C and Rust.
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[#1286](https://github.com/bytecodealliance/wasmtime/pull/1286)
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* A `wasmtime::Linker` type was added to conveniently link link wasm modules
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together and create instances that reference one another.
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[#1384](https://github.com/bytecodealliance/wasmtime/pull/1384)
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* Wasmtime now has "jitdump" support enabled by default which allows [profiling
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wasm code on linux][jitdump].
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[#1310](https://github.com/bytecodealliance/wasmtime/pull/1310)
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* The `wasmtime::Caller` type now exists as a first-class way to access the
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caller's exports, namely memory, when implementing host APIs. This can be the
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first argument of functions defined with `Func::new` or `Func::wrap` which
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allows easily implementing methods which take a pointer into wasm memory. Note
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that this only works for accessing the caller's `Memory` for now and it must
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be exported. This will eventually be replaced with a more general-purpose
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mechanism like interface types.
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[#1290](https://github.com/bytecodealliance/wasmtime/pull/1290)
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* The bulk memory proposal has been fully implemented.
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[#1264](https://github.com/bytecodealliance/wasmtime/pull/1264)
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[#976](https://github.com/bytecodealliance/wasmtime/pull/976)
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* Virtual file support has been added to `wasi-common`.
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[#701](https://github.com/bytecodealliance/wasmtime/pull/701)
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* The C API has been enhanced with a Wasmtime-specific `wasmtime_wat2wasm` to
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parse `*.wat` files via the C API.
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[#1206](https://github.com/bytecodealliance/wasmtime/pull/1206)
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[jitdump]: https://bytecodealliance.github.io/wasmtime/examples-profiling.html
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### Changed
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* The `wast` and `wasm2obj` standalone binaries have been removed. They're
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available via the `wasmtime wast` and `wasmtime wasm2obj` subcommands.
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[#1372](https://github.com/bytecodealliance/wasmtime/pull/1372)
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* The `wasi-common` crate now uses the new `wiggle` crate to auto-generate a
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trait which is implemented for the current wasi snapshot.
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[#1202](https://github.com/bytecodealliance/wasmtime/pull/1202)
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* Wasmtime no longer has a dependency on a C++ compiler.
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[#1365](https://github.com/bytecodealliance/wasmtime/pull/1365)
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* The `Func::wrapN` APIs have been consolidated into one `Func::wrap` API.
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[#1363](https://github.com/bytecodealliance/wasmtime/pull/1363)
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* The `Callable` trait has been removed and now `Func::new` takes a closure
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directly.
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[#1363](https://github.com/bytecodealliance/wasmtime/pull/1363)
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* The Cranelift repository has been merged into the Wasmtime repository.
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* Support for interface types has been temporarily removed.
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[#1292](https://github.com/bytecodealliance/wasmtime/pull/1292)
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* The exit code of the `wasmtime` CLI has changed if the program traps.
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[#1274](https://github.com/bytecodealliance/wasmtime/pull/1274)
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* The `wasmtime` CLI now logs to stderr by default and the `-d` flag has been
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renamed to `--log-to-file`.
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[#1266](https://github.com/bytecodealliance/wasmtime/pull/1266)
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* Values cannot cross `Store` objects, meaning you can't instantiate a module
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with values from different stores nor pass values from different stores into
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methods.
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[#1016](https://github.com/bytecodealliance/wasmtime/pull/1016)
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--------------------------------------------------------------------------------
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## 0.12.0
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Released 2020-02-26.
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### Added
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* Support for the [WebAssembly text annotations proposal][annotations-proposal]
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has been added.
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[#998](https://github.com/bytecodealliance/wasmtime/pull/998)
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* An initial C API for instantiating WASI modules has been added.
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[#977](https://github.com/bytecodealliance/wasmtime/pull/977)
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* A new suite of `Func::getN` functions have been added to the `wasmtime` API to
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call statically-known function signatures in a highly optimized fashion.
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[#955](https://github.com/bytecodealliance/wasmtime/pull/955)
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* Initial support for profiling JIT code through perf jitdump has been added.
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[#360](https://github.com/bytecodealliance/wasmtime/pull/360)
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* More CLI flags corresponding to proposed WebAssembly features have been added.
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[#917](https://github.com/bytecodealliance/wasmtime/pull/917)
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[annotations-proposal]: https://github.com/webassembly/annotations
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### Changed
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* The `wasmtime` CLI as well as embedding API will optimize WebAssembly code by
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default now.
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[#973](https://github.com/bytecodealliance/wasmtime/pull/973)
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[#988](https://github.com/bytecodealliance/wasmtime/pull/988)
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* The `verifier` pass in Cranelift is now no longer run by default when using
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the embedding API.
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[#882](https://github.com/bytecodealliance/wasmtime/pull/882)
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### Fixed
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* Code caching now accurately accounts for optimization levels, ensuring that if
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you ask for optimized code you're not accidentally handed unoptimized code
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from the cache.
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[#974](https://github.com/bytecodealliance/wasmtime/pull/974)
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* Automated releases for tags should be up and running again, along with
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automatic publication of the `wasmtime` Python package.
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[#971](https://github.com/bytecodealliance/wasmtime/pull/971)
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