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Add the pooling-allocator feature.

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This commit adds the `pooling-allocator` feature to both the `wasmtime` and
`wasmtime-runtime` crates.

The feature controls whether or not the pooling allocator implementation is
built into the runtime and exposed as a supported instance allocation strategy
in the wasmtime API.

The feature is on by default for the `wasmtime` crate.

Closes #3513.
This commit is contained in:
Peter Huene
2021-11-10 13:21:22 -08:00
parent 00feefe9a7
commit 58aab85680
9 changed files with 302 additions and 280 deletions
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7
crates/wasmtime/Cargo.toml
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@@ -52,7 +52,7 @@ wasi-cap-std-sync = { path = "../wasi-common/cap-std-sync" }
maintenance = { status = "actively-developed" }
[features]
default = ['async', 'cache', 'wat', 'jitdump', 'parallel-compilation', 'cranelift']
default = ['async', 'cache', 'wat', 'jitdump', 'parallel-compilation', 'cranelift', 'pooling-allocator']
# An on-by-default feature enabling runtime compilation of WebAssembly modules
# with the Cranelift compiler. Cranelift is the default compilation backend of
@@ -76,8 +76,11 @@ cache = ["wasmtime-cache"]
# `async fn` and calling functions asynchronously.
async = ["wasmtime-fiber", "wasmtime-runtime/async", "async-trait"]
# Enables support for the pooling instance allocation strategy
pooling-allocator = ["wasmtime-runtime/pooling-allocator"]
# Enables userfaultfd support in the runtime's pooling allocator when building on Linux
uffd = ["wasmtime-runtime/uffd"]
uffd = ["wasmtime-runtime/uffd", "pooling-allocator"]
# Enables support for all architectures in Cranelift, allowing
# cross-compilation using the `wasmtime` crate's API, notably the