cranelift

rust jit wasm webassembly runtime wasi cranelift sandbox wasmtime

Alex Crichton 4691f69efd Perform stronger typechecks of host-owned resources (#7902 ) * Perform stronger typechecks of host-owned resources Right now the abstraction for host-owned resources in Wasmtime is quite simple, it's "just an index". This can be error prone because the host can suffer both from use-after-free and ABA-style problems. While there's not much that can be done about use-after-free the previous implementation would accidentally enable "AB" style problems where if a host-owned resource index was deallocated and then reallocated with another type the original handle would still work. While not a major bug this can be confusing and additionally violate's our guarantees as a component runtime to guests to ensure that resources always have valid `rep`s going into components. This commit adds a new layer of storage which keeps track of the `ResourceType` for all host-owned resources. This means that resources going into a host-owned table now record their type and coming out of a host-owned table a typecheck is always performed. Note that guests can continue to skip this logic as they already have per-type tables and so won't suffer the same issue. This change is inspired by my taking a look at #7883. The crux of the issue was a typo where a resource was reused by accident which led to confusing behavior due to the reuse. This change instead makes it return an error more quickly and doesn't allow the component to see any invalid state. Closes #7883 * Fix test * Use generation counters, not types * Review comments		9 months ago
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bindgen	Update syntax for `trappable_error_type` in `bindgen!` (#7170)	1 year ago
aot.rs	Add an API to detect precompiled modules/components (#6832)	1 year ago
async.rs	Switch to simpler fuel APIs (#7298)	1 year ago
bindgen.rs	Add a whole lot of semicolons to WIT files (#7159)	1 year ago
dynamic.rs	Refactor `wasmtime::FuncType` to hold a handle to its registered type (#7892)	9 months ago
func.rs	Update the wasm-tools family of crates, disallow empty component types (#6777)	1 year ago
import.rs	Make `wasmtime::WasmCoreDump` serializable (#7078)	1 year ago
instance.rs	Implement nested instance exports for components (#4364)	2 years ago
macros.rs	Remove component union types (#6913)	1 year ago
nested.rs	Run some tests in MIRI on CI (#6332)	2 years ago
post_return.rs	Implement component model resources in Wasmtime (#6691)	1 year ago
resources.rs	Perform stronger typechecks of host-owned resources (#7902)	9 months ago
strings.rs	Run some tests in MIRI on CI (#6332)	2 years ago