c26a65a854
* x64: Add most remaining AVX lowerings This commit goes through `inst.isle` and adds a corresponding AVX lowering for most SSE lowerings. I opted to skip instructions where the SSE lowering didn't read/modify a register, such as `roundps`. I think that AVX will benefit these instructions when there's load-merging since AVX doesn't require alignment, but I've deferred that work to a future PR. Otherwise though in this PR I think all (or almost all) of the 3-operand forms of AVX instructions are supported with their SSE counterparts. This should ideally improve codegen slightly by removing register pressure and the need for `movdqa` between registers. I've attempted to ensure that there's at least one codegen test for all the new instructions. As a side note, the recent capstone integration into `precise-output` tests helped me catch a number of encoding bugs much earlier than otherwise, so I've found that incredibly useful in tests! * Move `vpinsr*` instructions to their own variant Use true `XmmMem` and `GprMem` types in the instruction as well to get more type-level safety for what goes where. * Remove `Inst::produces_const` accessor Instead of conditionally defining regalloc and various other operations instead add dedicated `MInst` variants for operations which are intended to produce a constant to have more clear interactions with regalloc and printing and such. * Fix tests * Register traps in `MachBuffer` for load-folding ops This adds a missing `add_trap` to encoding of VEX instructions with memory operands to ensure that if they cause a segfault that there's appropriate metadata for Wasmtime to understand that the instruction could in fact trap. This fixes a fuzz test case found locally where v8 trapped and Wasmtime didn't catch the signal and crashed the fuzzer.
wasmtime
A standalone runtime for WebAssembly
A Bytecode Alliance project
Guide | Contributing | Website | Chat
Installation
The Wasmtime CLI can be installed on Linux and macOS (locally) with a small install script:
curl https://wasmtime.dev/install.sh -sSf | bash
Windows or otherwise interested users can download installers and binaries directly from the GitHub Releases page.
Example
If you've got the Rust compiler installed then you can take some Rust source code:
fn main() {
println!("Hello, world!");
}
and compile/run it with:
$ rustup target add wasm32-wasi
$ rustc hello.rs --target wasm32-wasi
$ wasmtime hello.wasm
Hello, world!
Features
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Fast. Wasmtime is built on the optimizing Cranelift code generator to quickly generate high-quality machine code either at runtime or ahead-of-time. Wasmtime is optimized for efficient instantiation, low-overhead calls between the embedder and wasm, and scalability of concurrent instances.
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Secure. Wasmtime's development is strongly focused on correctness and security. Building on top of Rust's runtime safety guarantees, each Wasmtime feature goes through careful review and consideration via an RFC process. Once features are designed and implemented, they undergo 24/7 fuzzing donated by Google's OSS Fuzz. As features stabilize they become part of a release, and when things go wrong we have a well-defined security policy in place to quickly mitigate and patch any issues. We follow best practices for defense-in-depth and integrate protections and mitigations for issues like Spectre. Finally, we're working to push the state-of-the-art by collaborating with academic researchers to formally verify critical parts of Wasmtime and Cranelift.
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Configurable. Wasmtime uses sensible defaults, but can also be configured to provide more fine-grained control over things like CPU and memory consumption. Whether you want to run Wasmtime in a tiny environment or on massive servers with many concurrent instances, we've got you covered.
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WASI. Wasmtime supports a rich set of APIs for interacting with the host environment through the WASI standard.
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Standards Compliant. Wasmtime passes the official WebAssembly test suite, implements the official C API of wasm, and implements future proposals to WebAssembly as well. Wasmtime developers are intimately engaged with the WebAssembly standards process all along the way too.
Language Support
You can use Wasmtime from a variety of different languages through embeddings of the implementation.
Languages supported by the Bytecode Alliance:
- Rust - the
wasmtimecrate - C - the
wasm.h,wasi.h, andwasmtime.hheaders, CMake orwasmtimeConan package - C++ - the
wasmtime-cpprepository or usewasmtime-cppConan package - Python - the
wasmtimePyPI package - .NET - the
WasmtimeNuGet package - Go - the
wasmtime-gorepository - Ruby - the
wasmtimegem
Languages supported by the community:
- Elixir - the
wasmexhex package
Documentation
📚 Read the Wasmtime guide here! 📚
The wasmtime guide is the best starting point to learn about what Wasmtime can do for you or help answer your questions about Wasmtime. If you're curious in contributing to Wasmtime, it can also help you do that!
It's Wasmtime.