Struct ModuleLimits 

pub struct ModuleLimits {
    pub max_module_bytes: usize,
    pub max_expanded_locals: usize,
}

Per-module validation-time complexity limits (#32). Bounds compiler memory so a hostile module can’t OOM the compiler before it ever executes — layered on top of wasmparser’s hard per-dimension limits (function body size, locals, segment/type/function counts), which it does not expose for tuning. Each knob is additive: a module must pass every cap.

Additive deviation from wasmtime — no analog in wasmtime. Default yields the untrusted-tier ceilings (crate::Config::max_module_bytes / crate::Config::max_expanded_locals); trusted/curated packages pass higher — but still finite — limits via Module::new_with_limits.

Fields

max_module_bytes: usize

Maximum accepted module binary size, in bytes. Always finite (no unbounded option).

max_expanded_locals: usize

Maximum number of locals across all functions after run-length expansion. wasmparser bounds locals per function only; this bounds the module-wide arena they expand into.

Trait Implementations

impl Clone for ModuleLimits

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ModuleLimits

impl Debug for ModuleLimits

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ModuleLimits

fn default() -> Self

Returns the “default value” for a type.