wasmtime_environ/
demangling.rs

1//! Helpers for demangling function names.
2
3/// Demangles a single function name into a user-readable form.
4///
5/// Currently supported: Rust/C/C++ function names.
6pub fn demangle_function_name(writer: &mut impl core::fmt::Write, name: &str) -> core::fmt::Result {
7    #[cfg(feature = "demangle")]
8    if let Ok(demangled) = rustc_demangle::try_demangle(name) {
9        return write!(writer, "{demangled}");
10    } else if let Ok(symbol) = cpp_demangle::Symbol::new(name) {
11        let options = cpp_demangle::DemangleOptions::default();
12        if let Ok(demangled) = symbol.demangle(&options) {
13            return write!(writer, "{demangled}");
14        }
15    }
16
17    write!(writer, "{name}")
18}
19
20/// Demangles a function name if it's provided, or returns a unified representation based on the
21/// function index otherwise.
22pub fn demangle_function_name_or_index(
23    writer: &mut impl core::fmt::Write,
24    name: Option<&str>,
25    func_id: usize,
26) -> core::fmt::Result {
27    match name {
28        Some(name) => demangle_function_name(writer, name),
29        None => write!(writer, "<wasm function {func_id}>"),
30    }
31}
wasmtime_environ/demangling.rs

wasmtime_environ/
demangling.rs
