Struct InterpreterFrame 

pub struct InterpreterFrame {
    pub code: PyRef<PyCode>,
    pub func_obj: Option<PyObjectRef>,
    pub locals: FrameLocals,
    pub globals: PyDictRef,
    pub builtins: PyObjectRef,
    pub lasti: PyAtomic<u32>,
    pub trace: PyMutex<PyObjectRef>,
    pub trace_lines: PyMutex<bool>,
    pub trace_opcodes: PyMutex<bool>,
    pub temporary_refs: PyMutex<Vec<PyObjectRef>>,
    pub generator: PyAtomicBorrow,
    /* private fields */
}

Lightweight execution frame. Not a PyObject. Analogous to CPython’s _PyInterpreterFrame.

Currently always embedded inside a Frame PyObject via FrameUnsafeCell. In future PRs this will be usable independently for normal function calls (allocated on the Rust stack + DataStack), eliminating PyObject overhead.

Fields

code: PyRef<PyCode>

func_obj: Option<PyObjectRef>

locals: FrameLocals

globals: PyDictRef

builtins: PyObjectRef

lasti: PyAtomic<u32>

index of last instruction ran

trace: PyMutex<PyObjectRef>

tracer function for this frame (usually is None)

trace_lines: PyMutex<bool>

trace_opcodes: PyMutex<bool>

temporary_refs: PyMutex<Vec<PyObjectRef>>

generator: PyAtomicBorrow

Back-reference to owning generator/coroutine/async generator. Borrowed reference (not ref-counted) to avoid Generator↔Frame cycle. Cleared by the generator’s Drop impl.