Crate nanowasm [−] [src]

An attempt at creating an embeddable wasm interpreter that's bloody easier to use and debug than the parity-wasm one.

Structs

Func	A function ready to be executed.
FuncIdx	An index into a module's `function` vector.
FuncInstance	Contains all the information needed to execute a function.
FuncType	A type signature for a function type, intended to go into the `types` section of a module.
FunctionAddress	Function address type; refers to a particular `FuncInstance` in the Store.
Global
GlobalAddress	Global address type
Interpreter	An interpreter which runs a particular program.
JumpTarget	For forward jumps (if, block) we need to know where to jump TO. Serialized wasm doesn't store this information explicitly, and searching for it mid-execution is a wasteful PITA, so we find it ahead of time and then store it when the function is instantiated.
LoadedModule	A loaded wasm module
Memory	A structure containing a memory space.
MemoryAddress	Memory address type
ModuleAddress	Module instance address type
ModuleInstance	Relates all the local indices to globals, functions etc. from within a module to the global addresses of the Store.
StackFrame	The activation record for an executing function.
State	All the immutable parts of the interpreter state.
Store	All the mutable parts of the interpreter state. This slightly wacky structure helps keep borrows from being awful, a little bit.
Table	A table.
TableAddress	Table address type
TypeIdx	An index into a module's `type` vector.

An actual value used at runtime.

Convert one type to another by extending with leading zeroes or one's (depending on destination type)