Function decode_exception_table

crates/compiler-core/src/bytecode.rs:108–136

Decode all exception table entries.

(table: &[u8])

/// Decode all exception table entries.
pub fn decode_exception_table(table: &[u8]) -> Vec<ExceptionTableEntry> {
    let mut entries = Vec::new();
    let mut pos = 0;
    while pos < table.len() {
        let Some(start) = read_varint_with_start(table, &mut pos) else {
            break;
        };
        let Some(size) = read_varint(table, &mut pos) else {
            break;
        };
        let Some(target) = read_varint(table, &mut pos) else {
            break;
        };
        let Some(depth_lasti) = read_varint(table, &mut pos) else {
            break;
        };
        let Some(end) = start.checked_add(size) else {
            break;
        };
        entries.push(ExceptionTableEntry {
            start,
            end,
            target,
            depth: (depth_lasti >> 1) as u16,
            push_lasti: (depth_lasti & 1) != 0,
        });
    }
    entries
}

/// Parse linetable to build a boolean mask indicating which code units
/// have NO_LOCATION (line == -1). Returns a Vec<bool> of length `num_units`.