Struct rustc::mir::interpret::Allocation

pub struct Allocation {
    pub bytes: Vec<u8>,
    pub relocations: Relocations,
    pub undef_mask: UndefMask,
    pub align: Align,
    pub mutability: Mutability,
}

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Fields

bytes: Vec<u8>

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The actual bytes of the allocation. Note that the bytes of a pointer represent the offset of the pointer

relocations: Relocations

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Maps from byte addresses to allocations. Only the first byte of a pointer is inserted into the map; i.e., every entry in this map applies to pointer_size consecutive bytes starting at the given offset.

undef_mask: UndefMask

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Denotes undefined memory. Reading from undefined memory is forbidden in miri

align: Align

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The alignment of the allocation to detect unaligned reads.

mutability: Mutability

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Whether the allocation is mutable. Also used by codegen to determine if a static should be put into mutable memory, which happens for static mut and static with interior mutability.

Methods

impl Allocation

pub fn from_bytes(slice: &[u8], align: Align) -> Self

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Creates a read-only allocation initialized by the given bytes

pub fn from_byte_aligned_bytes(slice: &[u8]) -> Self

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pub fn undef(size: Size, align: Align) -> Self

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Trait Implementations

impl<'a> HashStable<StableHashingContext<'a>> for Allocation

fn hash_stable<W: StableHasherResult>(     &self,     hcx: &mut StableHashingContext<'a>,     hasher: &mut StableHasher<W> )

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impl Clone for Allocation

fn clone(&self) -> Allocation

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Allocation

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

Formats the value using the given formatter.

impl Eq for Allocation

fn assert_receiver_is_total_eq(&self)

impl PartialEq for Allocation

fn eq(&self, other: &Allocation) -> bool

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

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

This method tests for !=.

impl PartialOrd for Allocation

fn partial_cmp(&self, other: &Allocation) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Allocation) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Allocation) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Allocation) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Allocation) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Ord for Allocation

fn cmp(&self, other: &Allocation) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

impl Hash for Allocation

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 Encodable for Allocation

fn encode<__S: Encoder>(&self, s: &mut __S) -> Result<(), __S::Error>

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impl Decodable for Allocation

fn decode<__D: Decoder>(d: &mut __D) -> Result<Allocation, __D::Error>

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impl<'tcx> UseSpecializedDecodable for &'tcx Allocation

fn default_decode<D>(&mut D) -> Result<Self, <D as Decoder>::Error> where     D: Decoder,

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Defaults to returning an error (see SpecializationError).

impl<'a, 'tcx, 'x> SpecializedDecoder<&'tcx Allocation> for CacheDecoder<'a, 'tcx, 'x>

fn specialized_decode(&mut self) -> Result<&'tcx Allocation, Self::Error>

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Decode a value in a manner specific to this decoder state.