wasm-nm

List the symbols within a wasm file.

• Library
• Executable
• License
• Contributing

Executable

To install the wasm-nm executable, run

$ cargo install wasm-nm

For information on using the wasm-nm executable, run

$ wasm-nm --help

Using wasm-nm as a Size Profiler

wasm-nm can function as a rudimentary size profiler for .wasm files.

The -z option enables printing a function's code size. The unix sort utility can be used to sort the symbols by size. The rustfilt utility can be used to demangle Rust symbols (cargo install rustfilt).

$ wasm-nm -z path/to/something.wasm | sort -n -u -r | rustfilt | head 3578 p std::panicking::begin_panic_fmt::h47786a9a66db0de4 2078 p core::slice::slice_index_order_fail::h2c23bc1ce370b6f1 1324 p core::ptr::drop_in_place::hcd2d108484489df3 1268 p dlmalloc::dlmalloc::Dlmalloc::memalign::hee616eb0f35bbba8 1253 p std::io::Write::write_all::h1e22c345ee74bd20 1248 p core::fmt::num::<impl core::fmt::Debug for usize>::fmt::he64994cf6f0229ef 1064 p dlmalloc::dlmalloc::Dlmalloc::insert_large_chunk::h95b574ef6905303c 987 p dlmalloc::dlmalloc::Dlmalloc::dispose_chunk::hfb236c21060aea2f 978 e allocate_mappings 974 p source_map_mappings_wasm_api::LAST_ERROR::__getit::h52f017cac8e76e23

Library

To use wasm-nm as a library, add this to your Cargo.toml:

```toml [dependencies.wasm-nm]

Do not build the executable.

default-features = false ```

See docs.rs/wasm-nm for API documentation.

License

Licensed under either of

• Apache License, Version 2.0

• MIT license

at your option.

Contributing

See CONTRIBUTING.md for hacking.

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

License: Apache-2.0/MIT