Struct DeoptInfo 

pub struct DeoptInfo {
    pub resume_ip: usize,
    pub local_mapping: Vec<(u16, u16)>,
    pub local_kinds: Vec<SlotKind>,
    pub stack_depth: u16,
    pub innermost_function_id: Option<u16>,
    pub inline_frames: Vec<InlineFrameInfo>,
}

Metadata for deoptimization – maps JIT state back to interpreter state.

When a type guard or other speculative assumption fails inside JIT-compiled code, the JIT returns the deopt sentinel (u64::MAX). The VM uses this struct to reconstruct interpreter state from the JITContext locals and resume execution in the bytecode interpreter.

Fields

resume_ip: usize

Bytecode IP to resume at in the interpreter.

local_mapping: Vec<(u16, u16)>

Map from JIT local index to bytecode local index. Each pair is (jit_local_idx, bytecode_local_idx).

local_kinds: Vec<SlotKind>

SlotKind for each mapped local (parallel to local_mapping, used for unmarshaling JIT values back to interpreter ValueWord representation).

stack_depth: u16

Stack depth at this deopt point (number of values on the operand stack).

innermost_function_id: Option<u16>

Function ID of the innermost frame (where the guard fired). For single-frame deopt this equals the physical JIT function. For multi-frame deopt this is the inlined callee.

inline_frames: Vec<InlineFrameInfo>

Caller frames for multi-frame deopt (outermost-first: [0] = outermost physical function). Empty for single-frame deopt (the common case).

Trait Implementations

impl Clone for DeoptInfo

fn clone(&self) -> DeoptInfo

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DeoptInfo

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DeoptInfo

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for DeoptInfo

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.