Enum miri::machine::Provenance

pub enum Provenance {
    Concrete {
        alloc_id: AllocId,
        sb: SbTag,
    },
    Wildcard,
}

Pointer provenance.

Variants

Concrete

Fields

alloc_id: AllocId

sb: SbTag

Stacked Borrows tag.

Wildcard

Trait Implementations

impl Clone for Provenance

fn clone(&self) -> Provenance

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Provenance

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

Formats the value using the given formatter.

impl Hash for Provenance

fn hash<H: Hasher>(&self, _state: &mut H)

Feeds this value into the given Hasher.

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

Feeds a slice of this type into the given Hasher.

impl PartialEq<Provenance> for Provenance

fn eq(&self, _other: &Self) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Provenance for Provenance

const OFFSET_IS_ADDR: bool = true

We use absolute addresses in the offset of a Pointer<Provenance>.

const ERR_ON_PARTIAL_PTR_OVERWRITE: bool = false

We cannot err on partial overwrites, it happens too often in practice (due to unions).

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

Determines how a pointer should be printed.

fn get_alloc_id(self) -> Option<AllocId>

If OFFSET_IS_ADDR == false, provenance must always be able to identify the allocation this ptr points to (i.e., this must return Some). Otherwise this function is best-effort (but must agree with Machine::ptr_get_alloc). (Identifying the offset in that allocation, however, is harder – use Memory::ptr_get_alloc for that.)

fn join(left: Option<Self>, right: Option<Self>) -> Option<Self>

Defines the ‘join’ of provenance: what happens when doing a pointer load and different bytes have different provenance.

impl Copy for Provenance

impl Eq for Provenance

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 16 bytes

Size for each variant:

• Concrete: 16 bytes
• Wildcard: 0 bytes