WasmEdge command line tool (CLI)

The binary file is a command line interface (CLI) program that runs WebAssembly bytecode programs.

• If the WebAssembly program contains a main() function, wasmedge would execute it as a standalone program in the command mode.
• If the WebAssembly program contains one or more public functions, wasmedge could execute individual functions in the reactor mode.

1. (Optional) Statistics information:
   • Use --enable-time-measuring to show the execution time.
   • Use --enable-gas-measuring to show the amount of used gas.
   • Use --enable-instruction-count to display the number of executed instructions.
2. (Optional) Resource limitation:
   • Use --gas-limit to limit the execution cost.
   • Use --memory-page-limit to set the limitation of pages(as size of 64 KiB) in every memory instance.
3. (Optional) Reactor mode: use to enable reactor mode. In the reactor mode, wasmedge runs a specified function from the WebAssembly program.
   • WasmEdge will execute the function which name should be given in ARG[0].
   • If there’s exported function which names _initialize, the function will be executed with the empty parameter at first.
4. (Optional) Binding directories into WASI virtual filesystem.
   • Each directory can be specified as --dir guest_path:host_path.
5. (Optional) Environ variables.
6. Wasm file (/path/to/wasm/file).
7. (Optional) Arguments.
   • In reactor mode, the first argument will be the function name, and the arguments after ARG[0] will be parameters of wasm function ARG[0].
   • In command mode, the arguments will be parameters of function _start. They are also known as command line arguments for a standalone program.

Once installed, you can .

The options and flags for the wasmedgec are as follows.

1. Input Wasm file(/path/to/input/wasm/file).
2. Output file name(/path/to/output/file).
   • By default, it will generate the universal Wasm binary format.
   • Users can still generate native binary only by specifying the .so, .dylib, or .dll extensions.

wasmedgec app.wasm app.so