Struct WasmtimeInstance 

pub struct WasmtimeInstance { /* private fields */ }

A wrapper around a Wasmtime instance.

The Wasmtime engine constructs a new store and compiles an instance of a Wasm module.

Implementations

impl WasmtimeInstance

pub fn new(store: Store<StoreLimits>, module: Module) -> Result<Self>

Instantiate a new Wasmtime instance.

pub fn exported_functions(&mut self) -> Vec<(String, FuncType)>

Retrieve the names and types of all exported functions in the instance.

This is useful for evaluating each exported function with different values. The DiffInstance trait asks for the function name and we need to know the function signature in order to pass in the right arguments.

pub fn exported_globals(&mut self) -> Vec<(String, DiffValueType)>

Returns the list of globals and their types exported from this instance.

pub fn exported_memories(&mut self) -> Vec<(String, bool)>

Returns the list of exported memories and whether or not it’s a shared memory.

pub fn is_oom(&self) -> bool

Returns whether or not this instance has hit its OOM condition yet.

Trait Implementations

impl DiffInstance for WasmtimeInstance

fn name(&self) -> &'static str

Return the name of the engine behind this instance.

fn evaluate( &mut self, function_name: &str, arguments: &[DiffValue], _results: &[DiffValueType], ) -> Result<Option<Vec<DiffValue>>>

Evaluate an exported function with the given values.

fn get_global(&mut self, name: &str, _ty: DiffValueType) -> Option<DiffValue>

Attempts to return the value of the specified global, returning None if this engine doesn’t support retrieving globals at this time.

fn get_memory(&mut self, name: &str, shared: bool) -> Option<Vec<u8>>

Same as get_global but for memory.