Struct rustc_const_eval::interpret::memory::Memory

source ·

pub struct Memory<'tcx, M: Machine<'tcx>> {
    pub(super) alloc_map: M::MemoryMap,
    extra_fn_ptr_map: FxIndexMap<AllocId, M::ExtraFnVal>,
    pub(super) dead_alloc_map: FxIndexMap<AllocId, (Size, Align)>,
    validation_in_progress: Cell<bool>,
}

Fields§

§alloc_map: M::MemoryMap

Allocations local to this instance of the interpreter. The kind helps ensure that the same mechanism is used for allocation and deallocation. When an allocation is not found here, it is a global and looked up in the tcx for read access. Some machines may have to mutate this map even on a read-only access to a global (because they do pointer provenance tracking and the allocations in tcx have the wrong type), so we let the machine override this type. Either way, if the machine allows writing to a global, doing so will create a copy of the global allocation here.

§extra_fn_ptr_map: FxIndexMap<AllocId, M::ExtraFnVal>

Map for “extra” function pointers.

§dead_alloc_map: FxIndexMap<AllocId, (Size, Align)>

To be able to compare pointers with null, and to check alignment for accesses to ZSTs (where pointers may dangle), we keep track of the size even for allocations that do not exist any more.

§validation_in_progress: Cell<bool>

This stores whether we are currently doing reads purely for the purpose of validation. Those reads do not trigger the machine’s hooks for memory reads. Needless to say, this must only be set with great care!

Struct rustc_const_eval::interpret::memory::MemoryCopy item path

Fields§

Implementations§

impl<'tcx, M: Machine<'tcx>> Memory<'tcx, M>

pub fn new() -> Self

pub fn alloc_map(&self) -> &M::MemoryMap

Auto Trait Implementations§

impl<'tcx, M> !Freeze for Memory<'tcx, M>

impl<'tcx, M> !RefUnwindSafe for Memory<'tcx, M>

impl<'tcx, M> Send for Memory<'tcx, M>where <M as Machine<'tcx>>::MemoryMap: Send, <M as Machine<'tcx>>::ExtraFnVal: Send,

impl<'tcx, M> !Sync for Memory<'tcx, M>

impl<'tcx, M> Unpin for Memory<'tcx, M>where <M as Machine<'tcx>>::MemoryMap: Unpin, <M as Machine<'tcx>>::ExtraFnVal: Unpin,

impl<'tcx, M> UnwindSafe for Memory<'tcx, M>where <M as Machine<'tcx>>::MemoryMap: UnwindSafe, <M as Machine<'tcx>>::ExtraFnVal: UnwindSafe,

Blanket Implementations§

impl<T> Aligned for T

const ALIGN: Alignment = _

impl<T> Any for Twhere T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for Twhere T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T, R> CollectAndApply<T, R> for T

fn collect_and_apply<I, F>(iter: I, f: F) -> Rwhere I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

type Output = R

impl<T> Filterable for T

fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

impl<T> From<T> for T

fn from(t: T) -> T

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self>

fn in_current_span(self) -> Instrumented<Self>

impl<T, U> Into<U> for Twhere U: From<T>,

fn into(self) -> U

impl<T> IntoEither for T

fn into_either(self, into_left: bool) -> Either<Self, Self>

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>where F: FnOnce(&Self) -> bool,

impl<P> IntoQueryParam<P> for P

fn into_query_param(self) -> P

impl<T> MaybeResult<T> for T

type Error = !

fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

impl<T> Same for T

type Output = T

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<I, T, U> Upcast<I, U> for Twhere U: UpcastFrom<I, T>,

fn upcast(self, interner: I) -> U

impl<I, T> UpcastFrom<I, T> for T

fn upcast_from(from: T, _tcx: I) -> T

impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

fn vzip(self) -> V

impl<Tcx, T> Value<Tcx> for Twhere Tcx: DepContext,

default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed, ) -> T

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>where S: Into<Dispatch>,

fn with_current_subscriber(self) -> WithDispatch<Self>

impl<'a, T> Captures<'a> for Twhere T: ?Sized,

impl<T> ErasedDestructor for Twhere T: 'static,

impl<T> MaybeSendSync for T

Layout§

Struct rustc_const_eval::interpret::memory::Memory

impl<'tcx, M> Send for Memory<'tcx, M>
where <M as Machine<'tcx>>::MemoryMap: Send, <M as Machine<'tcx>>::ExtraFnVal: Send,

impl<'tcx, M> Unpin for Memory<'tcx, M>
where <M as Machine<'tcx>>::MemoryMap: Unpin, <M as Machine<'tcx>>::ExtraFnVal: Unpin,

impl<'tcx, M> UnwindSafe for Memory<'tcx, M>
where <M as Machine<'tcx>>::MemoryMap: UnwindSafe, <M as Machine<'tcx>>::ExtraFnVal: UnwindSafe,

impl<T> Any for T
where T: 'static + ?Sized,

impl<T> Borrow<T> for T
where T: ?Sized,

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

impl<T, U> Into<U> for T
where U: From<T>,

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

impl<T, U> TryFrom<U> for T
where U: Into<T>,

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

impl<I, T, U> Upcast<I, U> for T
where U: UpcastFrom<I, T>,

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

impl<Tcx, T> Value<Tcx> for T
where Tcx: DepContext,

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

impl<'a, T> Captures<'a> for T
where T: ?Sized,

impl<T> ErasedDestructor for T
where T: 'static,