Struct lucet_runtime_internals::c_api::lucet_alloc_limits

#[repr(C)]
pub struct lucet_alloc_limits {
    pub heap_memory_size: u64,
    pub heap_address_space_size: u64,
    pub stack_size: u64,
    pub globals_size: u64,
    pub signal_stack_size: u64,
}

Runtime limits for the various memories that back a Lucet instance.

Each value is specified in bytes, and must be evenly divisible by the host page size (4K).

Fields

heap_memory_size: u64

Max size of the heap, which can be backed by real memory. (default 1M)

heap_address_space_size: u64

Size of total virtual memory. (default 8G)

stack_size: u64

Size of the guest stack. (default 128K)

globals_size: u64

Size of the globals region in bytes; each global uses 8 bytes. (default 4K)

signal_stack_size: u64

Size of the signal stack in bytes. (default SIGSTKSZ for Rust release builds, 12K for Rust debug builds)

This difference is to account for the greatly increased stack size usage in the signal handler when running without optimizations.

Note that debug vs. release mode is determined by cfg(debug_assertions), so if you are specifically enabling Rust debug assertions in your Cargo release builds, the default signal stack will be larger.

Trait Implementations

impl Clone for lucet_alloc_limits

fn clone(&self) -> lucet_alloc_limits

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for lucet_alloc_limits

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

Formats the value using the given formatter.

impl<'_> From<&'_ Limits> for lucet_alloc_limits

fn from(limits: &Limits) -> lucet_alloc_limits

Performs the conversion.

impl<'_> From<&'_ lucet_alloc_limits> for Limits

fn from(limits: &lucet_alloc_limits) -> Limits

Performs the conversion.

impl From<Limits> for lucet_alloc_limits

fn from(limits: Limits) -> lucet_alloc_limits

Performs the conversion.

impl From<lucet_alloc_limits> for Limits

fn from(limits: lucet_alloc_limits) -> Limits

Performs the conversion.