Struct DeoptTracker 

pub struct DeoptTracker { /* private fields */ }

Tracks shape dependencies for JIT-compiled functions.

When a function is compiled with shape guards (e.g., guarding that an object has shape X for inline caching), the shape IDs it depends on are registered here. When a shape transition occurs, all functions that depend on the transitioning shape are invalidated.

Implementations

impl DeoptTracker

pub fn new() -> Self

Create an empty deopt tracker.

pub fn register(&mut self, function_id: u16, shape_ids: &[ShapeId])

Register shape dependencies for a compiled function.

Called after successful JIT compilation when the compilation result includes shape guard IDs.

pub fn invalidate_shape(&mut self, shape_id: ShapeId) -> Vec<u16>

Invalidate all functions that depend on the given shape.

Returns the list of function IDs that were invalidated (need to have their JIT code removed from the native_code_table).

pub fn clear_function(&mut self, function_id: u16)

Clear all dependencies for a function (e.g., when it’s recompiled).

pub fn tracked_function_count(&self) -> usize

Number of functions being tracked.

pub fn watched_shape_count(&self) -> usize

Number of shapes being watched.