Function global_code

crates/wasmtime/src/runtime/module/registry.rs:374–377

This is the global code registry that stores information for all loaded code objects that are currently in use by any `Store` in the current process. The purpose of this map is to be called from signal handlers to determine whether a program counter is a wasm trap or not. Specifically macOS has no contextual information about the thread available, hence the necessity for global state rather than

()

// registry. When a `ModuleRegistry` is destroyed then all of its entries
// are removed from the global registry.
fn global_code() -> &'static RwLock<GlobalRegistry> {
    static GLOBAL_CODE: OnceLock<RwLock<GlobalRegistry>> = OnceLock::new();
    GLOBAL_CODE.get_or_init(Default::default)
}

type GlobalRegistry = TryBTreeMap<usize, (usize, Arc<CodeMemory>)>;