T0b1/wasmtime
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Implement on-demand memory initialization for the uffd feature.

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This commit implements copying paged initialization data upon a fault of a
linear memory page.

If the initialization data is "paged", then the appropriate pages are copied
into the Wasm page (or zeroed if the page is not present in the
initialization data).

If the initialization data is not "paged", the Wasm page is zeroed so that
module instantiation can initialize the pages.
This commit is contained in:
Peter Huene
2021-02-16 23:27:14 -08:00
parent a82f1a323f
commit f5c4d87c45
10 changed files with 562 additions and 334 deletions
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crates/jit/Cargo.toml
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@@ -25,7 +25,7 @@ wasmtime-debug = { path = "../debug", version = "0.24.0" }
wasmtime-profiling = { path = "../profiling", version = "0.24.0" }
wasmtime-obj = { path = "../obj", version = "0.24.0" }
rayon = { version = "1.0", optional = true }
region = "2.1.0"
region = "2.2.0"
thiserror = "1.0.4"
target-lexicon = { version = "0.11.0", default-features = false }
wasmparser = "0.76"