Method define_function_inner

cranelift/object/src/backend.rs:638–679

(
        &mut self,
        func_id: FuncId,
        alignment: u64,
        bytes: &[u8],
        relocs: Vec<ObjectRelocRecord>,
    )

impl ObjectModule {
    fn define_function_inner(
        &mut self,
        func_id: FuncId,
        alignment: u64,
        bytes: &[u8],
        relocs: Vec<ObjectRelocRecord>,
    ) -> Result<(), ModuleError> {
        info!("defining function {func_id} with bytes");
        let decl = self.declarations.get_function_decl(func_id);
        let decl_name = decl.linkage_name(func_id);
        if !decl.linkage.is_definable() {
            return Err(ModuleError::InvalidImportDefinition(decl_name.into_owned()));
        }

        let &mut (symbol, ref mut defined) = self.functions[func_id].as_mut().unwrap();
        if *defined {
            return Err(ModuleError::DuplicateDefinition(decl_name.into_owned()));
        }
        *defined = true;

        let align = alignment.max(self.isa.symbol_alignment());
        let section = if self.per_function_section {
            // FIXME pass empty symbol name once add_subsection produces `.text` as section name
            // instead of `.text.` when passed an empty symbol name. (object#748) Until then pass
            // `subsection` to produce `.text.subsection` as section name to reduce confusion.
            self.object
                .add_subsection(StandardSection::Text, b"subsection")
        } else {
            self.object.section_id(StandardSection::Text)
        };
        let offset = self.object.add_symbol_data(symbol, section, bytes, align);

        if !relocs.is_empty() {
            self.relocs.push(SymbolRelocs {
                section,
                offset,
                relocs,
            });
        }

        Ok(())
    }

    /// Finalize all relocations and output an object.
    pub fn finish(mut self) -> ObjectProduct {