inldata := funcdata(f, abi.FUNCDATA_InlTree)
	if inldata == nil {
		return inlineUnwinder{f: f}, inlineFrame{pc: pc, index: -1}
	}
	inlTree := (*[1 << 20]inlinedCall)(inldata)
	u := inlineUnwinder{f: f, inlTree: inlTree}
	return u, u.resolveInternal(pc)
}

func (u *inlineUnwinder) resolveInternal(pc uintptr) inlineFrame {
	return inlineFrame{
		pc: pc,

	Pcsp      *LSym
	Pcfile    *LSym
	Pcline    *LSym
	Pcinline  *LSym
	Pcdata    []*LSym
	Funcdata  []*LSym
	UsedFiles map[goobj.CUFileIndex]struct{} // file indices used while generating pcfile
	InlTree   InlTree                        // per-function inlining tree extracted from the global tree
}

type Reloc struct {
	Off  int32
	Siz  uint8
	Type objabi.RelocType
	Add  int64
	Sym  *LSym
}

		for f := range pc.UsedFiles {
			o.File[i] = f
			i++
		}
		sort.Slice(o.File, func(i, j int) bool { return o.File[i] < o.File[j] })
		o.InlTree = make([]goobj.InlTreeNode, len(pc.InlTree.nodes))
		for i, inl := range pc.InlTree.nodes {
			f, l := ctxt.getFileIndexAndLine(inl.Pos)
			o.InlTree[i] = goobj.InlTreeNode{
				Parent:   int32(inl.Parent),
				File:     goobj.CUFileIndex(f),
				Line:     l,

	for _, f := range usedFiles {
		if filesym := ctxt.Lookup(files[f]); filesym != nil {
			fn(fsym, filesym)
		}
	}
	for _, call := range pc.InlTree.nodes {
		if call.Func != nil {
			fn(fsym, call.Func)
		}
	}

	// inlined functions' names into the closure's linker symbol name
	// too (#60324).
	if inlIndex := base.Ctxt.InnermostPos(pos).Base().InliningIndex(); inlIndex >= 0 {
		names := []string{outer}
		base.Ctxt.InlTree.AllParents(inlIndex, func(call obj.InlinedCall) {
			names = append(names, call.Name)
		})
		outer = strings.Join(names, ".")
	}

	*gen++
	return pkg.Lookup(fmt.Sprintf("%s%s%d", outer, suffix, *gen))
}

func (fi *FuncInfo) StartLine() int32 {
	return (*goobj.FuncInfo)(nil).ReadStartLine(fi.data)
}

// Preload has to be called prior to invoking the various methods
// below related to pcdata, funcdataoff, files, and inltree nodes.
func (fi *FuncInfo) Preload() {
	fi.lengths = (*goobj.FuncInfo)(nil).ReadFuncInfoLengths(fi.data)
}

func (fi *FuncInfo) NumFile() uint32 {
	if !fi.lengths.Initialized {