for _, f := range a.File {
		writeUint32(uint32(f))
	}
	writeUint32(uint32(len(a.InlTree)))
	for i := range a.InlTree {
		a.InlTree[i].Write(w)
	}
}

// FuncInfoLengths is a cache containing a roadmap of offsets and
// lengths for things within a serialized FuncInfo. Each length field
// stores the number of items (e.g. files, inltree nodes, etc), and the
// corresponding "off" field stores the byte offset of the start of

//
// Eventually, the compiler extracts a per-function inlining tree from
// the global inlining tree (see pcln.go).
type InlTree struct {
	nodes []InlinedCall
}

// InlinedCall is a node in an InlTree.
type InlinedCall struct {
	Parent   int      // index of the parent in the InlTree or < 0 if outermost call
	Pos      src.XPos // position of the inlined call
	Func     *LSym    // function that was inlined

	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,

	// children in the resulting table.
	parCallIdx := -1
	parInlIdx := base.Ctxt.InlTree.Parent(inlIdx)
	if parInlIdx >= 0 {
		parCallIdx = insertInlCall(dwcalls, parInlIdx, imap)
	}

	// Create new entry for this inline
	inlinedFn := base.Ctxt.InlTree.InlinedFunction(inlIdx)
	callXPos := base.Ctxt.InlTree.CallPos(inlIdx)
	callPos := base.Ctxt.InnermostPos(callXPos)

	for _, inlMark := range fn.InlMarks {
		pcinlineState.setParentPC(ctxt, int(inlMark.id), int32(inlMark.p.Pc))
	}
	pcln.InlTree = pcinlineState.localTree
	if ctxt.Debugpcln == "pctoinline" && len(pcln.InlTree.nodes) > 0 {
		ctxt.Logf("-- inlining tree for %s:\n", cursym)
		dumpInlTree(ctxt, pcln.InlTree)
		ctxt.Logf("--\n")
	}

	// tabulate which pc and func data we have.
	havepc := make([]uint32, (npcdata+31)/32)

		t.Errorf("Name() = %q, want %q", got, "")
	}
}

var dummy int

func inlined() {
	// Side effect to prevent elimination of this entire function.
	dummy = 42
}

// A function with an InlTree. Returns a PC within the function body.
//
// No inline to ensure this complete function appears in output.
//
//go:noinline
func tracebackFunc(t *testing.T) uintptr {

	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,

				default:
					panic(fmt.Sprint("Unhandled architecture:", target.Arch.Family))
				}
			}
			break // only need one
		}
	}
	return deferreturn
}

// genInlTreeSym generates the InlTree sym for a function with the
// specified FuncInfo.
func genInlTreeSym(ctxt *Link, cu *sym.CompilationUnit, fi loader.FuncInfo, arch *sys.Arch, nameOffsets map[loader.Sym]uint32) loader.Sym {
	ldr := ctxt.loader

	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)
		}
	}