Struct miri::machine::FrameExtra

pub struct FrameExtra<'tcx> {
    pub borrow_tracker: Option<FrameState>,
    pub catch_unwind: Option<CatchUnwindData<'tcx>>,
    pub timing: Option<DetachedTiming>,
    pub is_user_relevant: bool,
    salt: usize,
}

Extra data stored with each stack frame

Fields

borrow_tracker: Option<FrameState>

Extra data for the Borrow Tracker.

catch_unwind: Option<CatchUnwindData<'tcx>>

If this is Some(), then this is a special “catch unwind” frame (the frame of try_fn called by try). When this frame is popped during unwinding a panic, we stop unwinding, use the CatchUnwindData to handle catching.

timing: Option<DetachedTiming>

If measureme profiling is enabled, holds timing information for the start of this frame. When we finish executing this frame, we use this to register a completed event with measureme.

is_user_relevant: bool

Indicates whether a Frame is part of a workspace-local crate and is also not #[track_caller]. We compute this once on creation and store the result, as an optimization. This is used by MiriMachine::current_span and MiriMachine::caller_span

salt: usize

We have a cache for the mapping from mir::Const to resulting AllocId. However, we don’t want all frames to always get the same result, so we insert an additional bit of “salt” into the cache key. This salt is fixed per-frame so that within a call, a const will have a stable address.

Trait Implementations

impl<'tcx> Debug for FrameExtra<'tcx>

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

Formats the value using the given formatter.

impl VisitProvenance for FrameExtra<'_>

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

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: 272 bytes