Method linkage_name

src/binary_analysis/dwarf.rs:298–358

Obtain the linkage name of a subprogram or inlined subroutine.

(
        &self,
        unit: &Unit<ReaderTy<'_>>,
        die: &DebuggingInformationEntry<ReaderTy<'_>>,
    )

    /// Obtain the linkage name of a subprogram or inlined subroutine.
    fn linkage_name(
        &self,
        unit: &Unit<ReaderTy<'_>>,
        die: &DebuggingInformationEntry<ReaderTy<'_>>,
    ) -> Result<String, Error> {
        let mut name = None;
        let mut deleg = None;

        for attr in die.attrs() {
            match attr.name() {
                gimli::DW_AT_linkage_name => {
                    return Ok(self
                        .dwarf()
                        .attr_string(unit, attr.value())?
                        .to_string()?
                        .to_owned());
                }

                gimli::DW_AT_name => {
                    name = Some(
                        self.dwarf()
                            .attr_string(unit, attr.value())?
                            .to_string()?
                            .to_owned(),
                    );
                }

                gimli::DW_AT_abstract_origin | gimli::DW_AT_specification => {
                    // Delegation
                    deleg = Some(attr.value());
                }

                _ => (),
            }
        }

        if let Some(name) = name {
            return Ok(name);
        }

        let Some(refer) = deleg else {
            Err(Error::UnexpectedDwarf(
                "Cannot find name for DW_TAG_subprogram",
            ))?
        };

        match refer {
            AttributeValue::UnitRef(offset) => {
                let mut entries = unit.entries_at_offset(offset)?;
                entries
                    .next_entry()?
                    .then_some(())
                    .ok_or(Error::UnexpectedDwarf("Referenced entry not found"))?;

                let next_die = entries.current().unwrap();
                self.linkage_name(unit, next_die)
            }