Struct VarTable 

pub struct VarTable {
    pub vars: Vec<VarInfo>,
    pub by_slot: Vec<Vec<(u16, u16, u32)>>,
    pub has_lvt: bool,
    pub stack_vars: Vec<u32>,
    pub wide_stack_vars: HashSet<u32>,
    pub handler_starts: Vec<u16>,
}

Fields

vars: Vec<VarInfo>

by_slot: Vec<Vec<(u16, u16, u32)>>

Per slot: (range_start, range_end, var_id), sorted by range_start.

has_lvt: bool

stack_vars: Vec<u32>

Synthetic stack-merge variables (need declaration hoisting).

wide_stack_vars: HashSet<u32>

Merge variables whose branches disagreed on type (or carried a generic/plain-Object value); they must stay Object so every branch assignment type-checks. Evidence inference may not narrow them.

handler_starts: Vec<u16>

Exception-table handler start pcs: an LVT range beginning at one (or at its astore + 1/2) is a catch parameter binding. Such ranges never receive forward store attribution — a store just BEFORE a handler initializes the try-body variable, not the catch param (jdk11 HostnameChecker.matchDNS: sni = new SNIHostName(..) at pc 8 landed on iae whose handler range starts at 14, within the 8-byte lead-in — SNIHostName无法转换为 IllegalArgumentException).

Implementations

impl VarTable

Pull the typed Code attribute out of a method, if any.

pub fn add_stack_var(&mut self, slot: u16, name: String, ty: TypeRef) -> u32

pub fn add_split(&mut self, slot: u16, name: String, ty: TypeRef) -> u32

Allocate a synthetic variable that is NOT a stack-merge temp (e.g. a catch parameter); it must not be hoisted by the stack-var pass. Add a new variable identity for slot-reuse splitting (post-build; not registered in pc-range lookups).

pub fn add_catch_var(&mut self, slot: u16, name: String, ty: TypeRef) -> u32

pub fn at(&self, slot: u16, pc: u16) -> Option<u32>

Resolve the variable live at (pc, slot). Falls back to the nearest preceding range, then to any var on the slot.

pub fn sole_on_slot(&self, slot: u16) -> Option<u32>

The single variable covering a slot (when the slot is not reused).

pub fn vars_on_slot(&self, slot: u16) -> &[(u16, u16, u32)]

pub fn var(&self, id: u32) -> &VarInfo

pub fn var_mut(&mut self, id: u32) -> &mut VarInfo

Trait Implementations

impl Clone for VarTable

fn clone(&self) -> VarTable

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VarTable

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

Formats the value using the given formatter.

impl Default for VarTable

fn default() -> VarTable

Returns the “default value” for a type.