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wasmtime: Initial, partial support for externref

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This is enough to get an `externref -> externref` identity function
passing.

However, `externref`s that are dropped by compiled Wasm code are (safely)
leaked. Follow up work will leverage cranelift's stack maps to resolve this
issue.
This commit is contained in:
Nick Fitzgerald
2020-05-22 17:12:45 -07:00
parent 137e182750
commit a8ee0554a9
41 changed files with 545 additions and 376 deletions
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4
crates/jit/src/imports.rs
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@@ -31,8 +31,8 @@ pub fn resolve_imports(
match (import, &export) {
(EntityIndex::Function(func_index), Some(Export::Function(f))) => {
let import_signature = module.local.func_signature(*func_index);
let signature = signatures.lookup(f.signature).unwrap();
let import_signature = module.local.native_func_signature(*func_index);
let signature = signatures.lookup_native(f.signature).unwrap();
if signature != *import_signature {
// TODO: If the difference is in the calling convention,
// we could emit a wrapper function to fix it up.