Struct MemoryOffsetChoices

pub struct MemoryOffsetChoices(pub u32, pub u32, pub u32);

This is a tuple (a, b, c) where

• a / (a+b+c) is the probability of generating a memory offset within 0..memory.min_size, i.e. an offset that is definitely in bounds of a non-empty memory. (Note that if a memory is zero-sized, however, no offset will ever be in bounds.)

• b / (a+b+c) is the probability of generating a memory offset within memory.min_size..memory.max_size, i.e. an offset that is possibly in bounds if the memory has been grown.

• c / (a+b+c) is the probability of generating a memory offset within the range memory.max_size.., i.e. an offset that is definitely out of bounds.

At least one of a, b, and c must be non-zero.

If you want to always generate memory offsets that are definitely in bounds of a non-zero-sized memory, for example, you could return (1, 0, 0).

The default is (90, 9, 1).

Tuple Fields

0: u32

1: u32

2: u32

Trait Implementations

impl Clone for MemoryOffsetChoices

fn clone(&self) -> MemoryOffsetChoices

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MemoryOffsetChoices

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

Formats the value using the given formatter.

impl Default for MemoryOffsetChoices

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for MemoryOffsetChoices

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl FromStr for MemoryOffsetChoices

Available on crate feature _internal_cli only.

type Err = String

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.