Crate wasm_nm [−] [src]
List the symbols within a wasm file.
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:
[dependencies.wasm-nm]
# Do not build the executable.
default-features = false
See docs.rs/wasm-nm for API documentation.
License
Licensed under either of
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.
Structs
| Options |
Options for controlling which symbols are iterated over. |
| Symbols |
The set of symbols in a wasm file. |
| SymbolsIter |
An iterator returned by |
Enums
| Symbol |
A symbol from a wasm file. |
Functions
| symbols |
Get the symbols in the given wasm file. |