Struct Snapshot 

pub struct Snapshot {
    pub values: Vec<u32>,
    pub prev: Option<usize>,
    pub jitcode_index: u32,
    pub pc: u32,
}

A snapshot captures the interpreter state at a guard/exit point. opencoder.py: Snapshot

When a guard fails, the JIT needs to reconstruct the interpreter state (frames, local variables) from the snapshot to resume execution in the interpreter.

Fields

values: Vec<u32>

Encoded values (tagged): local variables and virtual object fields.

prev: Option<usize>

Index of the previous snapshot in the chain (for call stack).

jitcode_index: u32

Jitcode index identifying which interpreter function this frame belongs to.

pc: u32

Program counter (bytecode offset) within the jitcode.

Trait Implementations

impl Clone for Snapshot

fn clone(&self) -> Snapshot

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Snapshot

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

Formats the value using the given formatter.