Struct rustc_const_eval::interpret::eval_context::Frame

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pub struct Frame<'mir, 'tcx, Prov: Provenance = CtfeProvenance, Extra = ()> {
    pub body: &'mir Body<'tcx>,
    pub instance: Instance<'tcx>,
    pub extra: Extra,
    pub return_to_block: StackPopCleanup,
    pub return_place: MPlaceTy<'tcx, Prov>,
    pub locals: IndexVec<Local, LocalState<'tcx, Prov>>,
    tracing_span: SpanGuard,
    pub loc: Either<Location, Span>,
}
Expand description

A stack frame.

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§body: &'mir Body<'tcx>

The MIR for the function called on this frame.

§instance: Instance<'tcx>

The def_id and args of the current function.

§extra: Extra

Extra data for the machine.

§return_to_block: StackPopCleanup

Work to perform when returning from this function.

§return_place: MPlaceTy<'tcx, Prov>

The location where the result of the current stack frame should be written to, and its layout in the caller.

§locals: IndexVec<Local, LocalState<'tcx, Prov>>

The list of locals for this stack frame, stored in order as [return_ptr, arguments..., variables..., temporaries...]. The locals are stored as Option<Value>s. None represents a local that is currently dead, while a live local can either directly contain Scalar or refer to some part of an Allocation.

Do not access this directly; always go through the machine hook!

§tracing_span: SpanGuard

The span of the tracing crate is stored here. When the guard is dropped, the span is exited. This gives us a full stack trace on all tracing statements.

§loc: Either<Location, Span>

If this is Right, we are not currently executing any particular statement in this frame (can happen e.g. during frame initialization, and during unwinding on frames without cleanup code).

Needs to be public because ConstProp does unspeakable things to it.

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impl<'mir, 'tcx, Prov: Provenance> Frame<'mir, 'tcx, Prov>

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pub fn with_extra<Extra>(self, extra: Extra) -> Frame<'mir, 'tcx, Prov, Extra>

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impl<'mir, 'tcx, Prov: Provenance, Extra> Frame<'mir, 'tcx, Prov, Extra>

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pub fn current_loc(&self) -> Either<Location, Span>

Get the current location within the Frame.

If this is Left, we are not currently executing any particular statement in this frame (can happen e.g. during frame initialization, and during unwinding on frames without cleanup code).

Used by priroda.

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pub fn current_source_info(&self) -> Option<&SourceInfo>

Return the SourceInfo of the current instruction.

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pub fn current_span(&self) -> Span

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pub fn lint_root(&self) -> Option<HirId>

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pub(super) fn locals_addr(&self) -> usize

Returns the address of the buffer where the locals are stored. This is used by Place as a sanity check to detect bugs where we mix up which stack frame a place refers to.

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pub fn generate_stacktrace_from_stack(stack: &[Self]) -> Vec<FrameInfo<'tcx>>

Auto Trait Implementations§

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impl<'mir, 'tcx, Prov = CtfeProvenance, Extra = ()> !DynSend for Frame<'mir, 'tcx, Prov, Extra>

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impl<'mir, 'tcx, Prov = CtfeProvenance, Extra = ()> !DynSync for Frame<'mir, 'tcx, Prov, Extra>

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impl<'mir, 'tcx, Prov, Extra> Freeze for Frame<'mir, 'tcx, Prov, Extra>
where Extra: Freeze, Prov: Freeze,

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impl<'mir, 'tcx, Prov = CtfeProvenance, Extra = ()> !RefUnwindSafe for Frame<'mir, 'tcx, Prov, Extra>

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impl<'mir, 'tcx, Prov = CtfeProvenance, Extra = ()> !Send for Frame<'mir, 'tcx, Prov, Extra>

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impl<'mir, 'tcx, Prov = CtfeProvenance, Extra = ()> !Sync for Frame<'mir, 'tcx, Prov, Extra>

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impl<'mir, 'tcx, Prov, Extra> Unpin for Frame<'mir, 'tcx, Prov, Extra>
where Extra: Unpin, Prov: Unpin,

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impl<'mir, 'tcx, Prov = CtfeProvenance, Extra = ()> !UnwindSafe for Frame<'mir, 'tcx, Prov, Extra>

Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T, R> CollectAndApply<T, R> for T

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

Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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impl<T> Filterable for T

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

Creates a filterable data provider with the given name for debugging. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<P> IntoQueryParam<P> for P

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fn into_query_param(self) -> P

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impl<T> MaybeResult<T> for T

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type Error = !

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

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

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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<'tcx, T> ToPredicate<'tcx, T> for T

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fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T

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

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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

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

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impl<T> WithSubscriber for T

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

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<'a, T> Captures<'a> for T
where T: ?Sized,

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

Layout§

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.