Method build

crates/cranelift/src/debug/transform/range_info_builder.rs:92–164

(
        &self,
        addr_tr: &AddressTransform,
        out_unit: &mut write::Unit,
        current_scope_id: write::UnitEntryId,
    )

    }

    pub(crate) fn build(
        &self,
        addr_tr: &AddressTransform,
        out_unit: &mut write::Unit,
        current_scope_id: write::UnitEntryId,
    ) {
        match self {
            RangeInfoBuilder::Undefined => (),
            RangeInfoBuilder::Position(pc) => {
                let addr = addr_tr
                    .translate(*pc)
                    .unwrap_or(write::Address::Constant(0));
                let current_scope = out_unit.get_mut(current_scope_id);
                current_scope.set(gimli::DW_AT_low_pc, write::AttributeValue::Address(addr));
            }
            RangeInfoBuilder::Ranges(ranges) => {
                let mut result = Vec::new();
                for (begin, end) in ranges {
                    result.extend(addr_tr.translate_ranges(*begin, *end));
                }

                // If we're seeing the ranges for a `DW_TAG_compile_unit` DIE
                // then don't use `DW_AT_low_pc` and `DW_AT_high_pc`. These
                // attributes, if set, will configure the base address of all
                // location lists that this unit refers to. Currently this
                // debug transform does not take this base address into account
                // when generate the `.debug_loc` section. Consequently when a
                // compile unit is configured here the `DW_AT_ranges` attribute
                // is unconditionally used instead of
                // `DW_AT_low_pc`/`DW_AT_high_pc`.
                let is_attr_for_compile_unit =
                    out_unit.get(current_scope_id).tag() == gimli::DW_TAG_compile_unit;

                if result.len() != 1 || is_attr_for_compile_unit {
                    let range_list = result
                        .iter()
                        .map(|tr| write::Range::StartLength {
                            begin: tr.0,
                            length: tr.1,
                        })
                        .collect::<Vec<_>>();
                    let range_list_id = out_unit.ranges.add(write::RangeList(range_list));
                    let current_scope = out_unit.get_mut(current_scope_id);
                    current_scope.set(
                        gimli::DW_AT_ranges,
                        write::AttributeValue::RangeListRef(range_list_id),
                    );
                } else {
                    let current_scope = out_unit.get_mut(current_scope_id);
                    current_scope.set(
                        gimli::DW_AT_low_pc,
                        write::AttributeValue::Address(result[0].0),
                    );
                    current_scope.set(
                        gimli::DW_AT_high_pc,
                        write::AttributeValue::Udata(result[0].1),
                    );
                }