Struct miri::borrow_tracker::FrameState

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pub struct FrameState {
    call_id: CallId,
    protected_tags: SmallVec<[(AllocId, BorTag); 2]>,
}
Expand description

Per-call-stack-frame data for borrow tracking

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§call_id: CallId

The ID of the call this frame corresponds to.

§protected_tags: SmallVec<[(AllocId, BorTag); 2]>

If this frame is protecting any tags, they are listed here. We use this list to do incremental updates of the global list of protected tags stored in the stacked_borrows::GlobalState upon function return, and if we attempt to pop a protected tag, to identify which call is responsible for protecting the tag. See Stack::item_invalidated for more explanation. Tree Borrows also needs to know which allocation these tags belong to so that it can perform a read through them immediately before the frame gets popped.

This will contain one tag per reference passed to the function, so a size of 2 is enough for the vast majority of functions.

Trait Implementations§

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impl Debug for FrameState

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

Formats the value using the given formatter. Read more
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impl VisitProvenance for FrameState

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fn visit_provenance(&self, visit: &mut VisitWith<'_>)

Auto Trait Implementations§

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

Mutably borrows from an owned value. Read more
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fn collect_and_apply<I, F>(iter: I, f: F) -> R
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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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type Output = T

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type Error = Infallible

The type returned in the event of a conversion error.
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default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed ) -> T

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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: 56 bytes