Struct wasmtime_environ::Tunables

pub struct Tunables {
    pub static_memory_bound: u32,
    pub static_memory_offset_guard_size: u64,
    pub dynamic_memory_offset_guard_size: u64,
    pub generate_native_debuginfo: bool,
    pub parse_wasm_debuginfo: bool,
    pub interruptable: bool,
    pub consume_fuel: bool,
    pub static_memory_bound_is_maximum: bool,
}

Tunable parameters for WebAssembly compilation.

Fields

static_memory_bound: u32

For static heaps, the size in wasm pages of the heap protected by bounds checking.

static_memory_offset_guard_size: u64

The size in bytes of the offset guard for static heaps.

dynamic_memory_offset_guard_size: u64

The size in bytes of the offset guard for dynamic heaps.

generate_native_debuginfo: bool

Whether or not to generate native DWARF debug information.

parse_wasm_debuginfo: bool

Whether or not to retain DWARF sections in compiled modules.

interruptable: bool

Whether or not to enable the ability to interrupt wasm code dynamically.

More info can be found about the implementation in crates/environ/src/cranelift.rs. Note that you can’t interrupt host calls and interrupts are implemented through the VMInterrupts structure, or InterruptHandle in the wasmtime crate.

consume_fuel: bool

Whether or not fuel is enabled for generated code, meaning that fuel will be consumed every time a wasm instruction is executed.

static_memory_bound_is_maximum: bool

Whether or not to treat the static memory bound as the maximum for unbounded heaps.

Trait Implementations

impl Clone for Tunables

fn clone(&self) -> Tunables

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for Tunables

fn default() -> Self

Returns the “default value” for a type.

impl Hash for Tunables

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

pub fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.