Wasmer

Special thanks to [newpavlov](https://github.com/newpavlov) and [Maxgy](https://github.com/Maxgy) for their contributions!

- [942](https://github.com/wasmerio/wasmer/pull/942) Deny missing docs in runtime core and add missing docs
- [939](https://github.com/wasmerio/wasmer/pull/939) Fix bug causing attempts to append to files with WASI to delete the contents of the file
- [940](https://github.com/wasmerio/wasmer/pull/940) Update supported Rust version to 1.38+
- [923](https://github.com/wasmerio/wasmer/pull/923) Fix memory leak in the C API caused by an incorrect cast in `wasmer_trampoline_buffer_destroy`
- [921](https://github.com/wasmerio/wasmer/pull/921) In LLVM backend, annotate all memory accesses with TBAA metadata.
- [883](https://github.com/wasmerio/wasmer/pull/883) Allow floating point operations to have arbitrary inputs, even including SNaNs.
- [856](https://github.com/wasmerio/wasmer/pull/856) Expose methods in the runtime C API to get a WASI import object

Special thanks to alocquet for their contributions!

- [898](https://github.com/wasmerio/wasmer/pull/898) State tracking is now disabled by default in the LLVM backend. It can be enabled with `--track-state`.
- [861](https://github.com/wasmerio/wasmer/pull/861) Add descriptions to `unimplemented!` macro in various places
- [897](https://github.com/wasmerio/wasmer/pull/897) Removes special casing of stdin, stdout, and stderr in WASI. Closing these files now works. Removes `stdin`, `stdout`, and `stderr` from `WasiFS`, replaced by the methods `stdout`, `stdout_mut`, and so on.
- [863](https://github.com/wasmerio/wasmer/pull/863) Fix min and max for cases involving NaN and negative zero when using the LLVM backend.

Special thanks to jdanford for their contributions!

- [850](https://github.com/wasmerio/wasmer/pull/850) New `WasiStateBuilder` API. small, add misc. breaking changes to existing API (for example, changing the preopen dirs arg on `wasi::generate_import_object` from `Vec<String>` to `Vec<Pathbuf>`)
- [852](https://github.com/wasmerio/wasmer/pull/852) Make minor grammar/capitalization fixes to README.md
- [841](https://github.com/wasmerio/wasmer/pull/841) Slightly improve rustdoc documentation and small updates to outdated info in readme files
- [836](https://github.com/wasmerio/wasmer/pull/836) Update Cranelift fork version to `0.44.0`
- [839](https://github.com/wasmerio/wasmer/pull/839) Change supported version to stable Rust 1.37+
- [834](https://github.com/wasmerio/wasmer/pull/834) Fix panic when unwraping `wasmer` arguments
- [835](https://github.com/wasmerio/wasmer/pull/835) Add parallel execution example (independent instances created from the same `ImportObject` and `Module` run with rayon)
- [834](https://github.com/wasmerio/wasmer/pull/834) Fix panic when parsing numerical arguments for no-ABI targets run with the wasmer binary
- [833](https://github.com/wasmerio/wasmer/pull/833) Add doc example of using ImportObject's new `maybe_with_namespace` method
- [832](https://github.com/wasmerio/wasmer/pull/832) Delete unused runtime ABI
- [809](https://github.com/wasmerio/wasmer/pull/809) Fix bugs leading to panics in `LocalBacking`.
- [831](https://github.com/wasmerio/wasmer/pull/831) Add support for atomic operations, excluding wait and notify, to singlepass.
- [822](https://github.com/wasmerio/wasmer/pull/822) Update Cranelift fork version to `0.43.1`
- [829](https://github.com/wasmerio/wasmer/pull/829) Fix deps on `make bench-*` commands; benchmarks don't compile other backends now
- [807](https://github.com/wasmerio/wasmer/pull/807) Implement Send for `Instance`, breaking change on `ImportObject`, remove method `get_namespace` replaced with `with_namespace` and `maybe_with_namespace`
- [817](https://github.com/wasmerio/wasmer/pull/817) Add document for tracking features across backends and language integrations, [docs/feature_matrix.md]
- [823](https://github.com/wasmerio/wasmer/issues/823) Improved Emscripten / WASI integration
- [821](https://github.com/wasmerio/wasmer/issues/821) Remove patch version on most deps Cargo manifests. This gives Wasmer library users more control over which versions of the deps they use.
- [820](https://github.com/wasmerio/wasmer/issues/820) Remove null-pointer checks in `WasmPtr` from runtime-core, re-add them in Emscripten
- [803](https://github.com/wasmerio/wasmer/issues/803) Add method to `Ctx` to invoke functions by their `TableIndex`
- [790](https://github.com/wasmerio/wasmer/pull/790) Fix flaky test failure with LLVM, switch to large code model.
- [788](https://github.com/wasmerio/wasmer/pull/788) Use union merge on the changelog file.
- [785](https://github.com/wasmerio/wasmer/pull/785) Include Apache license file for spectests.
- [786](https://github.com/wasmerio/wasmer/pull/786) In the LLVM backend, lower atomic wasm operations to atomic machine instructions.
- [784](https://github.com/wasmerio/wasmer/pull/784) Fix help string for wasmer run.

Special thanks to YaronWittenstein penberg for their contributions.

- [776](https://github.com/wasmerio/wasmer/issues/776) Allow WASI preopened fds to be closed
- [774](https://github.com/wasmerio/wasmer/issues/774) Add more methods to the `WasiFile` trait
- [772](https://github.com/wasmerio/wasmer/issues/772) [#770](https://github.com/wasmerio/wasmer/issues/770) Handle more internal failures by passing back errors
- [756](https://github.com/wasmerio/wasmer/issues/756) Allow NULL parameter and 0 arity in `wasmer_export_func_call` C API
- [747](https://github.com/wasmerio/wasmer/issues/747) Return error instead of panicking on traps when using the Wasmer binary
- [741](https://github.com/wasmerio/wasmer/issues/741) Add validate Wasm fuzz target
- [733](https://github.com/wasmerio/wasmer/issues/733) Remove dependency on compiler backends for `middleware-common`
- [732](https://github.com/wasmerio/wasmer/issues/732) [#731](https://github.com/wasmerio/wasmer/issues/731) WASI bug fixes and improvements
- [726](https://github.com/wasmerio/wasmer/issues/726) Add serialization and deserialization for Wasi State
- [716](https://github.com/wasmerio/wasmer/issues/716) Improve portability of install script
- [714](https://github.com/wasmerio/wasmer/issues/714) Add Code of Conduct
- [708](https://github.com/wasmerio/wasmer/issues/708) Remove unconditional dependency on Cranelift in the C API
- [703](https://github.com/wasmerio/wasmer/issues/703) Fix compilation on AArch64 Linux
- [702](https://github.com/wasmerio/wasmer/issues/702) Add SharedMemory to Wasmer. Add `--enable-threads` flag, add partial implementation of atomics to LLVM backend.
- [698](https://github.com/wasmerio/wasmer/issues/698) [#690](https://github.com/wasmerio/wasmer/issues/690) [#687](https://github.com/wasmerio/wasmer/issues/690) Fix panics in Emscripten
- [689](https://github.com/wasmerio/wasmer/issues/689) Replace `wasmer_runtime_code::memory::Atomic` with `std::sync::atomic` atomics, changing its interface
- [680](https://github.com/wasmerio/wasmer/issues/680) [#673](https://github.com/wasmerio/wasmer/issues/673) [#669](https://github.com/wasmerio/wasmer/issues/669) [#660](https://github.com/wasmerio/wasmer/issues/660) [#659](https://github.com/wasmerio/wasmer/issues/659) Misc. runtime and singlepass fixes
- [677](https://github.com/wasmerio/wasmer/issues/677) [#675](https://github.com/wasmerio/wasmer/issues/675) [#674](https://github.com/wasmerio/wasmer/issues/674) LLVM backend fixes and improvements
- [671](https://github.com/wasmerio/wasmer/issues/671) Implement fs polling in `wasi::poll_oneoff` for Unix-like platforms
- [656](https://github.com/wasmerio/wasmer/issues/656) Move CI to Azure Pipelines
- [650](https://github.com/wasmerio/wasmer/issues/650) Implement `wasi::path_rename`, improve WASI FS public api, and allow open files to exist even when the underlying file is deleted
- [643](https://github.com/wasmerio/wasmer/issues/643) Implement `wasi::path_symlink` and improve WASI FS public api IO error reporting
- [608](https://github.com/wasmerio/wasmer/issues/608) Implement wasi syscalls `fd_allocate`, `fd_sync`, `fd_pread`, `path_link`, `path_filestat_set_times`; update WASI fs API in a WIP way; reduce coupling of WASI code to host filesystem; make debug messages from WASI more readable; improve rights-checking when calling syscalls; implement reference counting on inodes; misc bug fixes and improvements
- [616](https://github.com/wasmerio/wasmer/issues/616) Create the import object separately from instance instantiation in `runtime-c-api`
- [620](https://github.com/wasmerio/wasmer/issues/620) Replace one `throw()` with `noexcept` in llvm backend
- [618](https://github.com/wasmerio/wasmer/issues/618) Implement `InternalEvent::Breakpoint` in the llvm backend to allow metering in llvm
- [615](https://github.com/wasmerio/wasmer/issues/615) Eliminate `FunctionEnvironment` construction in `feed_event()` speeding up to 70% of compilation in clif
- [609](https://github.com/wasmerio/wasmer/issues/609) Update dependencies
- [602](https://github.com/wasmerio/wasmer/issues/602) C api extract instance context from instance
- [590](https://github.com/wasmerio/wasmer/issues/590) Error visibility changes in wasmer-c-api
- [589](https://github.com/wasmerio/wasmer/issues/589) Make `wasmer_byte_array` fields `public` in wasmer-c-api

- [603](https://github.com/wasmerio/wasmer/pull/603) Update Wapm-cli, bump version numbers
- [595](https://github.com/wasmerio/wasmer/pull/595) Add unstable public API for interfacing with the WASI file system in plugin-like usecases
- [598](https://github.com/wasmerio/wasmer/pull/598) LLVM Backend is now supported in Windows
- [599](https://github.com/wasmerio/wasmer/pull/599) Fix llvm backend failures in fat spec tests and simd_binaryen spec test.
- [579](https://github.com/wasmerio/wasmer/pull/579) Fix bug in caching with LLVM and Singlepass backends.
Add `default-backend-singlepass`, `default-backend-llvm`, and `default-backend-cranelift` features to `wasmer-runtime`
to control the `default_compiler()` function (this is a breaking change). Add `compiler_for_backend` function in `wasmer-runtime`
- [561](https://github.com/wasmerio/wasmer/pull/561) Call the `data_finalizer` field on the `Ctx`
- [576](https://github.com/wasmerio/wasmer/pull/576) fix `Drop` of uninit `Ctx`
- [542](https://github.com/wasmerio/wasmer/pull/542) Add SIMD support to Wasmer (LLVM backend only)
- Updates LLVM to version 8.0