Changelog

The format is based on Keep a Changelog.

Looking for changes that affect our C API? See the C API Changelog.

3.0.0-alpha.1 2022/07/28

Added

#3035 Added a simple "divide by zero" wast test, for #1899, as the trap information are correctly tracked on singlepass now
#3021 Add back missing Aarch64 relocations (needed for llvm compiler)
#3008 Add a new cargo public-api CI check
#2941 Implementation of WASIX and a fully networking for Web Assembly
#2952 CI: add make build-wasmer-wasm test
#2982 Add a rustfmt.toml file to the repository

Changed

#3049 Store::new now takes an impl Into<Engine>.
#3047 Store::new now takes an impl Into<Engine>.
#3046 Merge Backend into EngineBuilder and refactor feature flags
#3039 Improved hashing/ids of function envs
#3031 Update docs/migration_to_3.0.0.md
#3030 Remove cranelift dependency from wasmer-wasi
#3029 Removed Artifact, Engine traits. Renamed UniversalArtifact to Artifact, and UniversalEngine to Engine.
#3028 Rename old variable names from ctx to env (in case of FunctionEnv usage) and from ctx to store in case of store usage
#3023 Changed CI "rust install" action to dtolnay one
#3013 Refactor Context API
#3003 Remove RuntimeError::raise from public API
#3000 Allow debugging of EXC_BAD_INSTRUCTION on macOS
#2999 Allow --invoke CLI option for Emscripten files without a main function
#2996 Migrated all examples to new Context API
#2946 Remove dylib,staticlib engines in favor of a single Universal engine
#2949 Switch back to using custom LLVM builds on CI
#2892 Renamed get_native_function to get_typed_function, marked former as deprecated.
#2976 Upgrade enumset minimum version to one that compiles
#2974 Context api tests
#2973 Port C API to new Context API
#2969 Port JS API to new Context API
#2966 Singlepass nopanic #2966
#2957 Enable multi-value handling in Singlepass compiler
#2954 Some fixes to x86_64 Singlepass compiler, when using atomics
#2953 Makefile: add check target
#2950 compiler-cranelift: Fix typo in enum variant
#2947 Converted the WASI js test into a generic stdio test that works for both sys and js versions of wasmer
#2940 Merge wasmer3 back to master branch
#2939 Rename NativeFunc to TypedFunction

Fixed

#3045 Fixed WASI fd_read syscall when reading multiple iovs and read is partial (for #2904)
#3027 Fixed some residual doc issues that prevented make package-docs to build
#3026 test-js.yaml: fix typo
#3017 Fix typo in README.md
#3001 Fix context capi ci errors
#2997 Fix "run --invoke [function]" to behave the same as "run"
#2963 Remove accidental dependency on libwayland and libxcb in ClI
#2942 Fix clippy lints.
#2943 Fix build error on some archs by using c_char instead of i8
2976 Upgrade minimum enumset to one that compiles
2988 Have make targets install-capi-lib,install-pkgconfig work without building the wasmer binary
#2967 Fix singlepass on arm64 that was trying to emit a sub opcode with a constant as destination (for #2959)
#2948 Fix regression on gen_import_call_trampoline_arm64()
#2944 Fix duplicate entries in the CHANGELOG

2.3.0 - 2022/06/06

Added

#2862 Added CI builds for linux-aarch64 target.
#2811 Added support for EH Frames in singlepass
#2851 Allow Wasmer to compile to Wasm/WASI

Changed

#2807 Run Wasm code in a separate stack
#2802 Support Dylib engine with Singlepass
#2836 Improve TrapInformation data stored at runtime
#2864 wasmer-cli: remove wasi-experimental-io-devices from default builds
#2933 Rename NativeFunc to TypedFunction.
#2868 Removed loupe crate dependency

Fixed

#2829 Improve error message oriented from JS object.
#2828 Fix JsImportObject resolver.
#2872 Fix WasmerEnv finalizer
#2821 Opt in sys feature

2.2.1 - 2022/03/15

Fixed

#2812 Fixed another panic due to incorrect drop ordering.

2.2.0 - 2022/02/28

Added

#2775 Added support for SSE 4.2 in the Singlepass compiler as an alternative to AVX.
#2805 Enabled WASI experimental I/O devices by default in releases.

Fixed

#2795 Fixed a bug in the Singlepass compiler introduced in #2775.
#2806 Fixed a panic due to incorrect drop ordering of Module fields.

2.2.0-rc2 - 2022/02/15

Fixed

#2778 Fixed f32_load/f64_load in Singlepass. Also fixed issues with out-of-range conditional branches.
#2786 Fixed a potential integer overflow in WasmPtr memory access methods.
#2787 Fixed a codegen regression in the Singlepass compiler due to non-determinism of HashSet iteration.

2.2.0-rc1 - 2022/01/28

Added

#2750 Added Aarch64 support to Singlepass (both Linux and macOS).
#2753 Re-add "dylib" to the list of default features.

Changed

#2747 Use a standard header for metadata in all serialized modules.
#2759 Use exact version for Wasmer crate dependencies.

Fixed

#2769 Fixed deadlock in emscripten dynamic calls.
#2742 Fixed WASMER_METADATA alignment in the dylib engine.
#2746 Fixed invoking wasmer binfmt register from $PATH.
#2748 Use trampolines for all libcalls in engine-universal and engine-dylib.
#2766 Remove an attempt to reserve a GPR when no GPR clobbering is occurring.
#2768 Fixed serialization of FrameInfo on Dylib engine.

2.1.1 - 2021/12/20

Added

#2726 Added externs_vec method to ImportObject.
#2724 Added access to the raw Instance JS object in Wsasmer-js.

CHanged

#2711 Make C-API and Wasi dependencies more lean
#2706 Refactored the Singlepass compiler in preparation for AArch64 support (no user visible changes).

Fixed

#2717 Allow Exports to be modified after being cloned.
#2719 Fixed wasm_importtype_new's Rust signature to not assume boxed vectors.
#2723 Fixed a bug in parameter passing in the Singlepass compiler.
#2768 Fixed issue with Frame Info on dylib engine.

2.1.0 - 2021/11/30

Added

#2574 Added Windows support to Singlepass.
#2535 Added iOS support for Wasmer. This relies on the dylib-engine.
#2460 Wasmer can now compile to Javascript via wasm-bindgen. Use the js-default (and no default features) feature to try it!.
#2491 Added support for WASI to Wasmer-js.
#2436 Added the x86-32 bit variant support to LLVM compiler.
#2499 Added a subcommand to linux wasmer-cli to register wasmer with binfmt_misc
#2511 Added support for calling dynamic functions defined on the host
#2491 Added support for WASI in Wasmer-js
#2592 Added ImportObject::get_namespace_exports to allow modifying the contents of an existing namespace in an ImportObject.
#2694 wasmer-js: Allow an ImportObject to be extended with a JS object.
#2698 Provide WASI imports when invoking an explicit export from the CLI.
#2701 Improved VFS API for usage from JS

Changed

#2460 breaking change wasmer API usage with no-default-features requires now the sys feature to preserve old behavior.
#2476 Removed unncessary abstraction ModuleInfoTranslate from wasmer-compiler.
#2442 breaking change Improved WasmPtr, added WasmCell for host/guest interaction. WasmPtr::deref will now return WasmCell<'a, T> instead of &'a Cell<T>, WasmPtr::deref_mut is now deleted from the API.
#2427 Update loupe to 0.1.3.
#2685 The minimum LLVM version for the LLVM compiler is now 12. LLVM 13 is used by default.
#2569 Add Send and Sync to uses of the LikeNamespace trait object.
#2692 Made module serialization deterministic.
#2693 Validate CPU features when loading a deserialized module.

Fixed

#2599 Fixed Universal engine for Linux/Aarch64 target.
#2587 Fixed deriving WasmerEnv when aliasing Result.
#2518 Remove temporary file used to creating an artifact when creating a Dylib engine artifact.
#2494 Fixed WasmerEnv access when using call_indirect with the Singlepass compiler.
#2479 Improved wasmer validate error message on non-wasm inputs.
#2454 Won't set WASMER_CACHE_DIR for Windows.
#2426 Fix the wax script generation.
#2635 Fix cross-compilation for singlepass.
#2672 Use ENOENT instead of EINVAL in some WASI syscalls for a non-existent file
#2547 Delete temporary files created by the dylib engine.
#2548 Fix stack probing on x86_64 linux with the cranelift compiler.
#2557 #2559 Fix WASI dir path renaming.
#2560 Fix signal handling on M1 MacOS.
#2474 Fix permissions on WASMER_CACHE_DIR on Windows.
#2528 #2525 #2523 #2522 #2545 #2550 #2551 Fix various bugs in the new VFS implementation.
#2552 Fix stack guard handling on Windows.
#2585 Fix build with 64-bit MinGW toolchain.
#2587 Fix absolute import of Result in derive.
#2599 Fix AArch64 support in the LLVM compiler.
#2655 Fix argument parsing of --dir and --mapdir.
#2666 Fix performance on Windows by using static memories by default.
#2667 Fix error code for path_rename of a non-existant file
#2672 Fix error code returned by some wasi fs syscalls for a non-existent file
#2673 Fix BrTable codegen on the LLVM compiler
#2674 Add missing __WASI_RIGHT_FD_DATASYNC for preopened directories
#2677 Support 32-bit memories with 65536 pages
#2681 Fix slow compilation in singlepass by using dynasm's VecAssembler.
#2690 Fix memory leak when obtaining the stack bounds of a thread
#2699 Partially fix unbounded memory leak from the FuncDataRegistry

2.0.0 - 2021/06/16

Added

#2411 Extract types from wasi to a new wasi-types crate.
#2390 Make wasmer-vm to compile on Windows 32bits.
#2402 Add more examples and more doctests for wasmer-middlewares.

Changed

#2399 Add the Dart integration in the README.md.

Fixed

#2386 Handle properly when a module has no exported functions in the CLI.

2.0.0-rc2 - 2021/06/03

Fixed

#2383 Fix bugs in the Wasmer CLI tool with the way --version and the name of the CLI tool itself were printed.

2.0.0-rc1 - 2021/06/02

Added

#2348 Make Wasmer available on aarch64-linux-android.
#2315 Make the Cranelift compiler working with the Native engine.
#2306 Add support for the latest version of the Wasm SIMD proposal to compiler LLVM.
#2296 Add support for the bulk memory proposal in compiler Singlepass and compiler LLVM.
#2291 Type check tables when importing.
#2262 Make parallelism optional for the Singlepass compiler.
#2249 Make Cranelift unwind feature optional.
#2208 Add a new CHANGELOG.md specific to our C API to make it easier for users primarily consuming our C API to keep up to date with changes that affect them.
#2154 Implement Reference Types in the LLVM compiler.
#2003 Wasmer works with musl, and is built, tested and packaged for musl.
#2250 Use rkyv for the JIT/Universal engine.
#2190 Use rkyv to read native Module artifact.
#2186 Update and improve the Fuzz Testing infrastructure.
#2161 Make NaN canonicalization configurable.
#2116 Add a package for Windows that is not an installer, but all the lib and include files as for macOS and Linux.
#2123 Use ENABLE_{{compiler_name}}=(0|1) to resp. force to disable or enable a compiler when running the Makefile, e.g. ENABLE_LLVM=1 make build-wasmer.
#2123 libwasmer comes with all available compilers per target instead of Cranelift only.
#2135 Documentation for Linux distribution maintainers
#2104 Update WAsm core spectests and wasmparser.

Changed

#2369 Remove the deprecated --backend option in the CLI.
#2368 Remove the deprecated code in the wasmer-wasi crate.
#2367 Remove the deprecated features and associated code in the wasmer crate.
#2366 Remove the deprecated crates.
#2364 Rename wasmer-engine-object-file to wasmer-engine-staticlib.
#2356 Rename wasmer-engine-native to wasmer-engine-dylib.
#2340 Rename wasmer-engine-jit to wasmer-engine-universal.
#2307 Update Cranelift, implement low hanging fruit SIMD opcodes.
#2305 Clean up and improve the trap API, more deterministic errors etc.
#2299 Unused trap codes (due to Wasm spec changes), HeapSetterOutOfBounds and TableSetterOutOfBounds were removed from wasmer_vm::TrapCode and the numbering of the remaining variants has been adjusted.
#2293 The Memory::ty trait method now returns MemoryType by value. wasmer_vm::LinearMemory now recomputes MemoryType's minimum field when accessing its type. This behavior is what's expected by the latest spectests. wasmer::Memory::ty has also been updated to follow suit, it now returns MemoryType by value.
#2286 Replace the goblin crate by the object crate.
#2281 Refactor the wasmer_vm crate to remove unnecessary structs, reuse data when available etc.
#2251 Wasmer CLI will now execute WASI modules with multiple WASI namespaces in them by default. Use --allow-multiple-wasi-versions to suppress the warning and use --deny-multiple-wasi-versions to make it an error.
#2201 Implement loupe::MemoryUsage for wasmer::Instance.
#2200 Implement loupe::MemoryUsage for wasmer::Module.
#2199 Implement loupe::MemoryUsage for wasmer::Store.
#2195 Remove dependency to cranelift-entity.
#2140 Reduce the number of dependencies in the wasmer.dll shared library by statically compiling CRT.
#2113 Bump minimum supported Rust version to 1.49
#2144 Bump cranelift version to 0.70
#2149 wasmer-engine-native looks for clang-11 instead of clang-10.
#2157 Simplify the code behind WasmPtr

Fixed

#2397 Fix WASI rename temporary file issue.
#2391 Fix Singlepass emit bug, #2347 and #2159
#2327 Fix memory leak preventing internal instance memory from being freed when a WasmerEnv contained an exported extern (e.g. Memory, etc.).
#2247 Internal WasiFS logic updated to be closer to what WASI libc does when finding a preopened fd for a path.
#2241 Fix Undefined Behavior in setting memory in emscripten EmEnv.
#2224 Enable SIMD based on actual Wasm features in the Cranelift compiler.
#2217 Fix bug in i64.rotr X 0 in the LLVM compiler.
#2290 Handle Wasm modules with no imports in the CLI.
#2108 The Object Native Engine generates code that now compiles correctly with C++.
#2125 Fix RUSTSEC-2021-0023.
#2155 Fix the implementation of shift and rotate in the LLVM compiler.
#2101 cflags emitted by wasmer config --pkg-config are now correct.

1.0.2 - 2021-02-04

Added

#2053 Implement the non-standard wasi_get_unordered_imports function in the C API.
#2072 Add wasm_config_set_target, along with wasm_target_t, wasm_triple_t and wasm_cpu_features_t in the unstable C API.
#2059 Ability to capture stdout and stderr with WASI in the C API.
#2040 Add InstanceHandle::vmoffsets to expose the offsets of the vmctx region.
#2026 Expose trap code of a RuntimeError, if it's a Trap.
#2054 Add wasm_config_delete to the Wasm C API.
#2072 Added cross-compilation to Wasm C API.

Changed

#2085 Update to latest inkwell and LLVM 11.
#2037 Improved parallelism of LLVM with the Native/Object engine
#2012 Refactor Singlepass init stack assembly (more performant now)
#2036 Optimize memory allocated for Function type definitions
#2083 Mark wasi_env_set_instance and wasi_env_set_memory as deprecated. You may simply remove the calls with no side-effect.
#2056 Change back to depend on the enumset crate instead of wasmer_enumset

Fixed

#2066 Include 'extern "C"' in our C headers when included by C++ code.
#2090 wasi_env_t needs to be freed with wasi_env_delete in the C API.
#2084 Avoid calling the function environment finalizer more than once when the environment has been cloned in the C API.
#2069 Use the new documentation for include/README.md in the Wasmer package.
#2042 Parse more exotic environment variables in wasmer run.
#2041 Documentation diagrams now have a solid white background rather than a transparent background.
#2070 Do not drain the entire captured stream at first read with wasi_env_read_stdout or _stderr in the C API.
#2058 Expose WASI versions to C correctly.
#2044 Do not build C headers on docs.rs.

1.0.1 - 2021-01-12

This release includes a breaking change in the API (changing the trait enumset::EnumsetType to wasmer_enumset::EnumSetType and changing enumset::EnumSet in signatures to wasmer_enumset::EnumSet to work around a breaking change introduced by syn) but is being released as a minor version because 1.0.0 is also in a broken state due to a breaking change introduced by syn which affects enumset and thus wasmer.

This change is unlikely to affect any users of wasmer, but if it does please change uses of the enumset crate to the wasmer_enumset crate where possible.

Added

#2010 A new, experimental, minified build of wasmer called wasmer-headless will now be included with releases. wasmer-headless is the wasmer VM without any compilers attached, so it can only run precompiled Wasm modules.
#2005 Added the arguments alias and optional to WasmerEnv derive's export attribute.

Changed

#2006 Use wasmer_enumset, a fork of the enumset crate to work around a breaking change in syn
#1985 Bump minimum supported Rust version to 1.48

Fixed

#2007 Fix packaging of wapm on Windows
#2005 Emscripten is now working again.

1.0.0 - 2021-01-05

Added

#1969 Added D integration to the README

Changed

#1979 WasmPtr::get_utf8_string was renamed to WasmPtr::get_utf8_str and made unsafe.

Fixed

#1979 WasmPtr::get_utf8_string now returns a String, fixing a soundness issue in certain circumstances. The old functionality is available under a new unsafe function, WasmPtr::get_utf8_str.

1.0.0-rc1 - 2020-12-23

Added

#1894 Added exports wasmer::{CraneliftOptLevel, LLVMOptLevel} to allow using Cranelift::opt_level and LLVM::opt_level directly via the wasmer crate

Changed

#1941 Turn get_remaining_points/set_remaining_points of the Metering middleware into free functions to allow using them in an ahead-of-time compilation setup
#1955 Set jit as a default feature of the wasmer-wasm-c-api crate
#1944 Require WasmerEnv to be Send + Sync even in dynamic functions.
#1963 Removed to_wasm_error in favour of impl From<BinaryReaderError> for WasmError
#1962 Replace wasmparser::Result<()> with Result<(), MiddlewareError> in middleware, allowing implementors to return errors in FunctionMiddleware::feed

Fixed

#1949 wasm_<type>_vec_delete functions no longer crash when the given vector is uninitialized, in the Wasmer C API
#1949 The wasm_frame_vec_t, wasm_functype_vec_t, wasm_globaltype_vec_t, wasm_memorytype_vec_t, and wasm_tabletype_vec_t are now boxed vectors in the Wasmer C API

1.0.0-beta2 - 2020-12-16

Added

#1916 Add the WASMER_VERSION* constants with the wasmer_version* functions in the Wasmer C API
#1867 Added Metering::get_remaining_points and Metering::set_remaining_points
#1881 Added UnsupportedTarget error to CompileError
#1908 Implemented TryFrom<Value<T>> for i32/u32/i64/u64/f32/f64
#1927 Added mmap support in Engine::deserialize_from_file to speed up artifact loading
#1911 Generalized signature type in Function::new and Function::new_with_env to accept owned and reference FunctionType as well as array pairs. This allows users to define signatures as constants. Implemented From<([Type; $N], [Type; $M])> for FunctionType to support this.

Changed

#1865 Require that implementors of WasmerEnv also implement Send, Sync, and Clone.
#1851 Improve test suite and documentation of the Wasmer C API
#1874 Set CompilerConfig to be owned (following wasm-c-api)
#1880 Remove cmake dependency for tests
#1924 Rename reference implementation wasmer::Tunables to wasmer::BaseTunables. Export trait wasmer_engine::Tunables as wasmer::Tunables.

Fixed

#1865 Fix memory leaks with host function environments.
#1870 Fixed Trap instruction address maps in Singlepass

#1914 Implemented TryFrom<Bytes> for Pages instead of From<Bytes> for Pages to properly handle overflow errors

1.0.0-beta1 - 2020-12-01

Added

#1839 Added support for Metering Middleware
#1837 It is now possible to use exports of an Instance even after the Instance has been freed
#1831 Added support for Apple Silicon chips (arm64-apple-darwin)
#1739 Improved function environment setup via WasmerEnv proc macro.
#1649 Add outline of migration to 1.0.0 docs.

Changed

#1739 Environments passed to host function- must now implement the WasmerEnv trait. You can implement it on your existing type with #[derive(WasmerEnv)].
#1838 Deprecate WasiEnv::state_mut: prefer WasiEnv::state instead.
#1663 Function environments passed to host functions now must be passed by & instead of &mut. This is a breaking change. This change fixes a race condition when a host function is called from multiple threads. If you need mutability in your environment, consider using std::sync::Mutex or other synchronization primitives.
#1830 Minimum supported Rust version bumped to 1.47.0
#1810 Make the state field of WasiEnv public

Fixed

#1857 Fix dynamic function with new Environment API
#1855 Fix memory leak when using wat2wasm in the C API, the function now takes its output parameter by pointer rather than returning an allocated wasm_byte_vec_t.
#1841 We will now panic when attempting to use a native function with a captured env as a host function. Previously this would silently do the wrong thing. See #1840 for info about Wasmer's support of closures as host functions.
#1764 Fix bug in WASI path_rename allowing renamed files to be 1 directory below a preopened directory.

1.0.0-alpha5 - 2020-11-06

Added

#1761 Implement the wasm_trap_t** argument of wasm_instance_new in the Wasm C API.
#1687 Add basic table example; fix ownership of local memory and local table metadata in the VM.
#1751 Implement wasm_trap_t inside a function declared with wasm_func_new_with_env in the Wasm C API.
#1741 Implement wasm_memory_type in the Wasm C API.
#1736 Implement wasm_global_type in the Wasm C API.
#1699 Update wasm.h to its latest version.
#1685 Implement wasm_exporttype_delete in the Wasm C API.
#1725 Implement wasm_func_type in the Wasm C API.
#1715 Register errors from wasm_module_serialize in the Wasm C API.
#1709 Implement wasm_module_name and wasm_module_set_name in the Wasm(er) C API.
#1700 Implement wasm_externtype_copy in the Wasm C API.
#1785 Add more examples on the Rust API.
#1783 Handle initialized but empty results in wasm_func_call in the Wasm C API.
#1780 Implement new SIMD zero-extend loads in compiler-llvm.
#1754 Implement aarch64 ABI for compiler-llvm.
#1693 Add wasmer create-exe subcommand.

Changed

#1772 Remove lifetime parameter from NativeFunc.
#1762 Allow the = sign in a WASI environment variable value.
#1710 Memory for function call trampolines is now owned by the Artifact.
#1781 Cranelift upgrade to 0.67.
#1777 Wasmparser update to 0.65.
#1775 Improve LimitingTunables implementation.
#1720 Autodetect llvm regardless of architecture.

Fixed

#1718 Fix panic in the API in some situations when the memory's min bound was greater than the memory's max bound.
#1731 In compiler-llvm always load before store, to trigger any traps before any bytes are written.

1.0.0-alpha4 - 2020-10-08

Added

#1635 Implement wat2wasm in the Wasm C API.
#1636 Implement wasm_module_validate in the Wasm C API.
#1657 Implement wasm_trap_t and wasm_frame_t for Wasm C API; add examples in Rust and C of exiting early with a host function.

Fixed

#1690 Fix wasm_memorytype_limits where min and max represents pages, not bytes. Additionally, fixes the max limit sentinel value.
#1671 Fix probestack firing inappropriately, and sometimes over/under allocating stack.
#1660 Fix issue preventing map-dir aliases starting with / from working properly.
#1624 Add Value::I32/Value::I64 converters from unsigned ints.

Changed

#1682 Improve error reporting when making a memory with invalid settings.
#1691 Bump minimum supported Rust version to 1.46.0
#1645 Move the install script to https://github.com/wasmerio/wasmer-install

1.0.0-alpha3 - 2020-09-14

Fixed

#1620 Fix bug causing the Wapm binary to not be packaged with the release
#1619 Improve error message in engine-native when C compiler is missing

1.0.0-alpha02.0 - 2020-09-11

Added

#1566 Add support for opening special Unix files to the WASI FS

Fixed

#1602 Fix panic when calling host functions with negative numbers in certain situations
#1590 Fix soundness issue in API of vm::Global

TODO: 1.0.0-alpha01.0

Wasmer refactor lands

0.17.1 - 2020-06-24

Changed

#1439 Move wasmer-interface-types into its own repository

Fixed

#1554 Update supported stable Rust version to 1.45.2.
#1552 Disable sigint handler by default.

0.17.0 - 2020-05-11

Added

#1331 Implement the record type and instrutions for WIT
#1345 Adding ARM testing in Azure Pipelines
#1329 New numbers and strings instructions for WIT
#1285 Greatly improve errors in wasmer-interface-types
#1303 NaN canonicalization for singlepass backend.
#1313 Add new high-level public API through wasmer crate. Includes many updates including:
- Minor improvement: imports! macro now handles no trailing comma as well as a trailing comma in namespaces and between namespaces.
- New methods on Module: exports, imports, and custom_sections.
- New way to get exports from an instance with let func_name: Func<i32, i64> = instance.exports.get("func_name");.
- Improved Table APIs including set which now allows setting functions directly. TODO: update this more if Table::get gets made public in this PR
- TODO: finish the list of changes here
#1305 Handle panics from DynamicFunc.
#1300 Add support for multiple versions of WASI tests: wasitests now test all versions of WASI.
#1292 Experimental Support for Android (x86_64 and AArch64)

Fixed

#1283 Workaround for floating point arguments and return values in DynamicFuncs.

Changed

#1401 Make breaking change to RuntimeError: RuntimeError is now more explicit about its possible error values allowing for better insight into why a call into Wasm failed.
#1382 Refactored test infranstructure (part 2)
#1380 Refactored test infranstructure (part 1)
#1357 Refactored bin commands into separate files
#1335 Change mutability of memory to const in wasmer_memory_data_length in the C API
#1332 Add option to CompilerConfig to force compiler IR verification off even when debug_assertions are enabled. This can be used to make debug builds faster, which may be important if you're creating a library that wraps Wasmer and depend on the speed of debug builds.
#1320 Change custom_sections field in ModuleInfo to be more standards compliant by allowing multiple custom sections with the same name. To get the old behavior with the new API, you can add .last().unwrap() to accesses. For example, module_info.custom_sections["custom_section_name"].last().unwrap().
#1301 Update supported stable Rust version to 1.41.1.

0.16.2 - 2020-03-11

Fixed

#1294 Fix bug related to system calls in WASI that rely on reading from WasmPtrs as arrays of length 0. WasmPtr will now succeed on length 0 arrays again.

0.16.1 - 2020-03-11

Fixed

#1291 Fix installation packaging script to package the wax command.

0.16.0 - 2020-03-11

Added

#1286 Updated Windows Wasmer icons. Add wax
#1284 Implement string and memory instructions in wasmer-interface-types

Fixed

#1272 Fix off-by-one error bug when accessing memory with a WasmPtr that contains the last valid byte of memory. Also changes the behavior of WasmPtr<T, Array> with a length of 0 and WasmPtr<T> where std::mem::size_of::<T>() is 0 to always return None

0.15.0 - 2020-03-04

#1263 Changed the behavior of some WASI syscalls to now handle preopened directories more properly. Changed default --debug logging to only show Wasmer-related messages.
#1217 Polymorphic host functions based on dynamic trampoline generation.
#1252 Allow / in wasi --mapdir wasm path.
#1212 Add support for GDB JIT debugging:
- Add --generate-debug-info and -g flags to wasmer run to generate debug information during compilation. The debug info is passed via the GDB JIT interface to a debugger to allow source-level debugging of Wasm files. Currently only available on clif-backend.
- Break public middleware APIs: there is now a source_loc parameter that should be passed through if applicable.
- Break compiler trait methods such as feed_local, feed_event as well as ModuleCodeGenerator::finalize.

0.14.1 - 2020-02-24

#1245 Use Ubuntu 16.04 in CI so that we use an earlier version of GLIBC.
#1234 Check for unused excluded spectest failures.
#1232 wasmer-interface-types has a WAT decoder.

0.14.0 - 2020-02-20

#1233 Improved Wasmer C API release artifacts.
#1216 wasmer-interface-types receives a binary encoder.
#1228 Singlepass cleanup: Resolve several FIXMEs and remove protect_unix.
#1218 Enable Cranelift verifier in debug mode. Fix bug with table indices being the wrong type.
#787 New crate wasmer-interface-types to implement WebAssembly Interface Types.
#1213 Fixed WASI fdstat to detect isatty properly.
#1192 Use ExceptionCode for error representation.
#1191 Fix singlepass miscompilation on Operator::CallIndirect.
#1180 Fix compilation for target x86_64-unknown-linux-musl.
#1170 Improve the WasiFs builder API with convenience methods for overriding stdin, stdout, and stderr as well as a new sub-builder for controlling the permissions and properties of preopened directories. Also breaks that implementations of WasiFile must be Send -- please file an issue if this change causes you any issues.
#1161 Require imported functions to be Send. This is a breaking change that fixes a soundness issue in the API.
#1140 Use blake3 as default hashing algorithm for caching.
#1129 Standard exception types for singlepass backend.

0.13.1 - 2020-01-16

Fix bug in wapm related to the package.wasmer_extra_flags entry in the manifest

0.13.0 - 2020-01-15

Special thanks to @repi and @srenatus for their contributions!

#1153 Added Wasmex, an Elixir language integration, to the README
#1133 New wasmer_trap function in the C API, to properly error from within a host function
#1147 Remove log and trace macros from wasmer-runtime-core, remove debug and trace features from wasmer-* crates, use the log crate for logging and use fern in the Wasmer CLI binary to output log messages. Colorized output will be enabled automatically if printing to a terminal, to force colorization on or off, set the WASMER_COLOR environment variable to true or false.
#1128 Fix a crash when a host function is missing and the allow_missing_functions flag is enabled
#1099 Remove backend::Backend from wasmer_runtime_core
#1097 Move inline breakpoint outside of runtime backend
#1095 Update to cranelift 0.52.
#1092 Add get_utf8_string_with_nul to WasmPtr to read nul-terminated strings from memory.
#1071 Add support for non-trapping float-to-int conversions, enabled by default.

0.12.0 - 2019-12-18

Special thanks to @ethanfrey, @AdamSLevy, @Jasper-Bekkers, @srenatus for their contributions!

#1078 Increase the maximum number of parameters Func can take
#1062 Expose some opt-in Emscripten functions to the C API
#1032 Change the signature of the Emscripten abort function to work with Emscripten 1.38.30
#1060 Test the capi with all the backends
#1069 Add function get_memory_and_data to Ctx to help prevent undefined behavior and mutable aliasing. It allows accessing memory while borrowing data mutably for the Ctx lifetime. This new function is now being used in wasmer-wasi.
#1058 Fix minor panic issue when wasmer::compile_with called with llvm backend.
#858 Minor panic fix when wasmer binary with loader option run a module without exported _start function.
#1056 Improved --invoke args parsing (supporting i32, i64, f32 and f32) in Wasmer CLI
#1054 Improve --invoke output in Wasmer CLI
#1053 For RuntimeError and breakpoints, use Box<Any + Send> instead of Box.
#1052 Fix minor panic and improve Error handling in singlepass backend.
#1050 Attach C & C++ headers to releases.
#1033 Set cranelift backend as default compiler backend again, require at least one backend to be enabled for Wasmer CLI
#1044 Enable AArch64 support in the LLVM backend.
#1030 Ability to generate ImportObject for a specific version WASI version with the C API.
#1028 Introduce strict/non-strict modes for get_wasi_version
#1029 Add the “floating” WasiVersion::Latest version.
#1006 Fix minor panic issue when wasmer::compile_with called with llvm backend
#1009 Enable LLVM verifier for all tests, add new llvm-backend-tests crate.
#1022 Add caching support for Singlepass backend.
#1004 Add the Auto backend to enable to adapt backend usage depending on wasm file executed.
#1068 Various cleanups for the singlepass backend on AArch64.

0.11.0 - 2019-11-22

#713 Add AArch64 support for singlepass.
#995 Detect when a global is read without being initialized (emit a proper error instead of panicking)
#996 Refactored spectests, emtests and wasitests to use default compiler logic
#992 Updates WAPM version to 0.4.1, fix arguments issue introduced in #990
#990 Default wasmer CLI to run. Wasmer will now attempt to parse unrecognized command line options as if they were applied to the run command: wasmer mywasm.wasm --dir=. now works!
#987 Fix runtime-c-api header files when compiled by gnuc.
#957 Change the meaning of wasmer_wasi::is_wasi_module to detect any type of WASI module, add support for new wasi snapshot_preview1
#934 Simplify float expressions in the LLVM backend.

0.10.2 - 2019-11-18

#968 Added --invoke option to the command
#964 Enable cross-compilation for specific target
#971 In LLVM backend, use unaligned loads and stores for non-atomic accesses to wasmer memory.
#960 Fix runtime-c-api header files when compiled by clang.
#925 Host functions can be closures with a captured environment.
#917 Host functions (aka imported functions) may not have &mut vm::Ctx as first argument, i.e. the presence of the &mut vm::Ctx argument is optional.
#915 All backends share the same definition of Trampoline (defined in wasmer-runtime-core).

0.10.1 - 2019-11-11

#952 Use C preprocessor to properly hide trampoline functions on Windows and non-x86_64 targets.

0.10.0 - 2019-11-11

Special thanks to @newpavlov and @Maxgy for their contributions!

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

0.9.0 - 2019-10-23

Special thanks to @alocquet for their contributions!

#898 State tracking is now disabled by default in the LLVM backend. It can be enabled with --track-state.
#861 Add descriptions to unimplemented! macro in various places
#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 Fix min and max for cases involving NaN and negative zero when using the LLVM backend.

0.8.0 - 2019-10-02

Special thanks to @jdanford for their contributions!

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

0.7.0 - 2019-09-12

Special thanks to @YaronWittenstein @penberg for their contributions.

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

0.6.0 - 2019-07-31

#603 Update Wapm-cli, bump version numbers
#595 Add unstable public API for interfacing with the WASI file system in plugin-like usecases
#598 LLVM Backend is now supported in Windows
#599 Fix llvm backend failures in fat spec tests and simd_binaryen spec test.
#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 Call the data_finalizer field on the Ctx
#576 fix Drop of uninit Ctx
#542 Add SIMD support to Wasmer (LLVM backend only)
- Updates LLVM to version 8.0

0.5.7 - 2019-07-23

#575 Prepare for release; update wapm to 0.3.6
#555 WASI filesystem rewrite. Major improvements
- adds virtual root showing all preopened directories
- improved sandboxing and code-reuse
- symlinks work in a lot more situations
- many misc. improvements to most syscalls touching the filesystem

0.5.6 - 2019-07-16

#565 Update wapm and bump version to 0.5.6
#563 Improve wasi testing infrastructure
- fixes arg parsing from comments & fixes the mapdir test to have the native code doing the same thing as the WASI code
- makes wasitests-generate output stdout/stderr by default & adds function to print stdout and stderr for a command if it fails
- compiles wasm with size optimizations & strips generated wasm with wasm-strip
#554 Finish implementation of wasi::fd_seek, fix bug in filestat
#550 Fix singlepass compilation error with imul instruction

0.5.5 - 2019-07-10

#541 Fix dependency graph by making separate test crates; ABI implementations should not depend on compilers. Add Cranelift fork as git submodule of clif-backend
#537 Add hidden flag (--cache-key) to use prehashed key into the compiled wasm cache and change compiler backend-specific caching to use directories
#536 ~~Update cache to use compiler backend name in cache key~~

0.5.4 - 2019-07-06

#529 Updates the Wasm Interface library, which is used by wapm, with bug fixes and error message improvements

0.5.3 - 2019-07-03

#523 Update wapm version to fix bug related to signed packages in the global namespace and locally-stored public keys

0.5.2 - 2019-07-02

#516 Add workaround for singlepass miscompilation on GetLocal
#521 Update Wapm-cli, bump version numbers
#518 Update Cranelift and WasmParser
#514 #519 Improved Emscripten network related calls, added a null check to WasmPtr
#515 Improved Emscripten dyncalls
#513 Fix emscripten lseek implementation.
#510 Simplify construction of floating point constants in LLVM backend. Fix LLVM assertion failure due to definition of %ctx.

0.5.1 - 2019-06-24

#508 Update wapm version, includes bug fixes

0.5.0 - 2019-06-17

#471 Added missing functions to run Python. Improved Emscripten bindings
#494 Remove deprecated type aliases from libc in the runtime C API
#493 wasmer_module_instantiate has better error messages in the runtime C API
#474 Set the install name of the dylib to @rpath
#490 Add MiddlewareChain and StreamingCompiler to runtime
#487 Fix stack offset check in singlepass backend
#450 Added Metering
#481 Added context trampoline into runtime
#484 Fix bugs in emscripten socket syscalls
#476 Fix bug with wasi::environ_get, fix off by one error in wasi::environ_sizes_get
#470 Add mapdir support to Emscripten, implement getdents for Unix
#467 wasmer_instantiate returns better error messages in the runtime C API
#463 Fix bug in WASI path_open allowing one level above preopened dir to be accessed
#461 Prevent passing negative lengths in various places in the runtime C API
#459 Add monotonic and real time clocks for wasi on windows
#447 Add trace macro (--features trace) for more verbose debug statements
#451 Add --mapdir=src:dest flag to rename host directories in the guest context
#457 Implement file metadata for WASI, fix bugs in WASI clock code for Unix platforms

0.4.2 - 2019-05-16

#416 Remote code loading framework
#449 Fix bugs: opening host files in filestat and opening with write permissions unconditionally in path_open
#442 Misc. WASI FS fixes and implement readdir
#440 Fix type mismatch between wasmer_instance_call and wasmer_export_func_*_arity functions in the runtime C API.
#269 Add better runtime docs
#432 Fix returned value of wasmer_last_error_message in the runtime C API
#429 Get wasi::path_filestat_get working for some programs; misc. minor WASI FS improvements
#413 Update LLVM backend to use new parser codegen traits

0.4.1 - 2019-05-06

#426 Update wapm-cli submodule, bump version to 0.4.1
#422 Improved Emscripten functions to run optipng and pngquant compiled to wasm
#409 Improved Emscripten functions to run JavascriptCore compiled to wasm
#399 Add example of using a plugin extended from WASI
#397 Fix WASI fs abstraction to work on Windows
#390 Pin released wapm version and add it as a git submodule
#408 Add images to windows installer and update installer to add wapm bin directory to path

0.4.0 - 2019-04-23

#383 Hook up wasi exit code to wasmer cli.
#382 Improve error message on --backend flag to only suggest currently enabled backends
#381 Allow retrieving propagated user errors.
#379 Fix small return types from imported functions.
#371 Add more Debug impl for WASI types
#368 Fix issue with write buffering
#343 Implement preopened files for WASI and fix aligment issue when accessing WASI memory
#367 Add caching support to the LLVM backend.
#366 Remove UserTrapper trait to fix #365.
#348 Refactor internal runtime ↔️ backend abstraction.
#355 Misc changes to Cargo.tomls for publishing
#352 Bump version numbers to 0.3.0
#351 Add hidden option to specify wasm program name (can be used to improve error messages)
#350 Enforce that CHANGELOG.md is updated through CI.
#349 Add CHANGELOG.md.

0.3.0 - 2019-04-12

#276 #288 #344 Use new singlepass backend (with the --backend=singlepass when running Wasmer)
#338 Actually catch traps/panics/etc when using a typed func.
#325 Fixed func_index in debug mode
#323 Add validate subcommand to validate Wasm files
#321 Upgrade to Cranelift 0.3.0
#319 Add Export and GlobalDescriptor to Runtime API
#310 Cleanup warnings
#299 #300 #301 #303 #304 #305 #306 #307 Add support for WASI 🎉
#286 Add extend to imports
#278 Add versioning to cache
#250 Setup bors

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