)

// ContextTraceType represents the type of golang Context key
type ContextTraceType string

// ContextTraceKey is the key of TraceCtxt saved in a Golang context
const ContextTraceKey = ContextTraceType("ctx-trace-info")

// TraceCtxt holds related tracing data of a http request.
type TraceCtxt struct {
	RequestRecorder  *xhttp.RequestRecorder
	ResponseRecorder *xhttp.ResponseRecorder

	FuncName string
	AmzReqID string

// This function handles the first part.
func asmb(ctxt *Link) {
	// TODO(jfaller): delete me.
	if thearch.Asmb != nil {
		thearch.Asmb(ctxt, ctxt.loader)
		return
	}

	if ctxt.IsELF {
		Asmbelfsetup()
	}

	var wg sync.WaitGroup
	f := func(ctxt *Link, out *OutBuf, start, length int64) {
		pad := thearch.CodePad
		if pad == nil {
			pad = zeros[:]
		}
		CodeblkPad(ctxt, out, start, length, pad)
	}

)

func setUpContext(arch *sys.Arch, iself bool, ht objabi.HeadType, bm, lm string) *Link {
	ctxt := linknew(arch)
	ctxt.HeadType = ht
	er := loader.ErrorReporter{}
	ctxt.loader = loader.NewLoader(0, &er)
	ctxt.BuildMode.Set(bm)
	ctxt.LinkMode.Set(lm)
	ctxt.IsELF = iself
	ctxt.mustSetHeadType()
	ctxt.setArchSyms()
	return ctxt
}

// Make sure the addgotsym properly increases the symbols.
func TestAddGotSym(t *testing.T) {

	}
	ctxt := obj.Linknew(architecture.LinkArch)
	ctxt.Debugasm = flags.PrintOut
	ctxt.Debugvlog = flags.DebugV
	ctxt.Flag_dynlink = *flags.Dynlink
	ctxt.Flag_linkshared = *flags.Linkshared
	ctxt.Flag_shared = *flags.Shared || *flags.Dynlink
	ctxt.Flag_maymorestack = flags.DebugFlags.MayMoreStack
	ctxt.Debugpcln = flags.DebugFlags.PCTab
	ctxt.IsAsm = true
	ctxt.Pkgpath = *flags.Importpath

	}
}

// WriteFloat32 writes f into s at offset off.
func (s *LSym) WriteFloat32(ctxt *Link, off int64, f float32) {
	s.prepwrite(ctxt, off, 4)
	ctxt.Arch.ByteOrder.PutUint32(s.P[off:], math.Float32bits(f))
}

// WriteFloat64 writes f into s at offset off.
func (s *LSym) WriteFloat64(ctxt *Link, off int64, f float64) {
	s.prepwrite(ctxt, off, 8)
	ctxt.Arch.ByteOrder.PutUint64(s.P[off:], math.Float64bits(f))
}

		}
	}

	ctxt.typeMap[h] = append(ctxt.typeMap[h], ctxtEntry{
		orig:     orig,
		targs:    targs,
		instance: inst,
	})

	return inst
}

// getID returns a unique ID for the type t.
func (ctxt *Context) getID(t Type) int {
	ctxt.mu.Lock()
	defer ctxt.mu.Unlock()
	id, ok := ctxt.originIDs[t]
	if !ok {
		id = ctxt.nextID
		ctxt.originIDs[t] = id
		ctxt.nextID++
	}

}

// determineLinkMode sets ctxt.LinkMode.
//
// It is called after flags are processed and inputs are processed,
// so the ctxt.LinkMode variable has an initial value from the -linkmode
// flag and the iscgo, externalobj, and unknownObjFormat variables are set.
func determineLinkMode(ctxt *Link) {
	extNeeded, extReason := mustLinkExternal(ctxt)
	via := ""

	if ctxt.LinkMode == LinkAuto {

	"cmd/link/internal/sym"
)

var sehp struct {
	pdata []sym.LoaderSym
	xdata []sym.LoaderSym
}

func writeSEH(ctxt *Link) {
	switch ctxt.Arch.Family {
	case sys.AMD64:
		writeSEHAMD64(ctxt)
	}
}

func writeSEHAMD64(ctxt *Link) {
	ldr := ctxt.loader
	mkSecSym := func(name string, kind sym.SymKind) *loader.SymbolBuilder {
		s := ldr.CreateSymForUpdate(name, 0)
		s.SetType(kind)

	}

	for _, test := range tests {
		fileIndex, line := ctxt.getFileIndexAndLine(ctxt.PosTable.XPos(test.pos))

		file := "??"
		if fileIndex >= 0 {
			file = ctxt.PosTable.FileTable()[fileIndex]
		}
		got := fmt.Sprintf("%s:%d", file, line)

		if got != test.want {
			t.Errorf("ctxt.getFileSymbolAndLine(%v) = %q, want %q", test.pos, got, test.want)
		}
	}

	ctxt.set_pc(ctxt.pc() + 4)
}

// case 8
func (h *debugCallHandler) debugCallUnsafe(ctxt *sigctxt) {
	sp := ctxt.sp()
	reason := *(*string)(unsafe.Pointer(uintptr(sp) + 8))
	h.err = plainError(reason)
	ctxt.set_pc(ctxt.pc() + 4)
}

// case 16
func (h *debugCallHandler) restoreSigContext(ctxt *sigctxt) {
	// Restore all registers except for pc and sp
	pc, sp := ctxt.pc(), ctxt.sp()
	*ctxt.regs() = h.sigCtxt.savedRegs