f5c4d87c45
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 is the wasmtime-environ crate, which contains the implementations
of the ModuleEnvironment and FuncEnvironment traits from
cranelift-wasm. They effectively
implement an ABI for basic wasm compilation that defines how linear memories
are allocated, how indirect calls work, and other details. They can be used
for JITing, native object files, or other purposes.