// We need to use a name that will be exported by the
		// Go code; otherwise gccgo will make it static and we
		// will not be able to link against it from the C
		// code.
		goName := "Cgoexp_" + exp.ExpName
		fmt.Fprintf(fgcc, `extern %s %s %s __asm__("%s.%s");`, cRet, goName, cParams, gccgoSymbolPrefix, gccgoToSymbol(goName))
		fmt.Fprint(fgcc, "\n")

		fmt.Fprint(fgcc, "\nCGO_NO_SANITIZE_THREAD\n")

			// So we just check the prefix.

			c := len(goExp)
			if c > len(zstdExp) {
				c = len(zstdExp)
			}
			goExp = goExp[:c]
			zstdExp = zstdExp[:c]
			if !bytes.Equal(goExp, zstdExp) {
				t.Error("byte mismatch after error")
				t.Logf("Go error: %v\n", goErr)
				t.Logf("zstd error: %v\n", zstdErr)
				showDiffs(t, zstdExp, goExp)
			}
		}
	})

// configuration tuple and returns the enabled and baseline experiment
// flag sets.
//
// TODO(mdempsky): Move to internal/goexperiment.
func ParseGOEXPERIMENT(goos, goarch, goexp string) (*ExperimentFlags, error) {
	// regabiSupported is set to true on platforms where register ABI is
	// supported and enabled by default.
	// regabiAlwaysOn is set to true on platforms where register ABI is
	// always on.

  main\.main\(\)
      .*/main\.go:34 \+0x[0-9,a-f]+

Previous write at 0x[0-9,a-f]+ by goroutine [0-9]:
  main\.goCallback\(\)
      .*/main\.go:27 \+0x[0-9,a-f]+
  _cgoexp_[0-9a-z]+_goCallback\(\)
      .*_cgo_gotypes\.go:[0-9]+ \+0x[0-9,a-f]+
  _cgoexp_[0-9a-z]+_goCallback\(\)
      <autogenerated>:1 \+0x[0-9,a-f]+

Goroutine [0-9] \(running\) created at:
  runtime\.newextram\(\)

	}
	return false, nil
}

func hasGoexperiment(s *script.State, value string) (bool, error) {
	GOOS, _ := s.LookupEnv("GOOS")
	GOARCH, _ := s.LookupEnv("GOARCH")
	goexp, _ := s.LookupEnv("GOEXPERIMENT")
	flags, err := buildcfg.ParseGOEXPERIMENT(GOOS, GOARCH, goexp)
	if err != nil {
		return false, err
	}
	for _, exp := range flags.All() {
		if value == exp {
			return true, nil
		}

				}
				tim *= timeoutScale
			}
		case "-goexperiment": // set GOEXPERIMENT environment
			args = args[1:]
			if goexp != "" {
				goexp += ","
			}
			goexp += args[0]
			runenv = append(runenv, "GOEXPERIMENT="+goexp)

		case "-godebug": // set GODEBUG environment
			args = args[1:]
			if godebug != "" {
				godebug += ","
			}
			godebug += args[0]

	st := ldr.SymType(s)
	cgoeStatic := ldr.AttrCgoExportStatic(s)
	cgoeDynamic := ldr.AttrCgoExportDynamic(s)
	cgoexp := (cgoeStatic || cgoeDynamic)

	d.AddUint32(target.Arch, uint32(dstru.Addstring(name)))

	if elf64 {

		/* type */
		var t uint8

		if cgoexp && st == sym.STEXT {
			t = elf.ST_INFO(elf.STB_GLOBAL, elf.STT_FUNC)
		} else {

		state.nfunc++
		if state.firstFunc == 0 {
			state.firstFunc = s
		}
		state.lastFunc = s

		// We need to keep track of all compilation units we see. Some symbols
		// (eg, go.buildid, _cgoexp_, etc) won't have a compilation unit.
		cu := ldr.SymUnit(s)
		if _, ok := seenCUs[cu]; cu != nil && !ok {
			seenCUs[cu] = struct{}{}
			cu.PclnIndex = len(compUnits)
			compUnits = append(compUnits, cu)
		}
	}

	ldr := ctxt.loader
	for s, nsym := loader.Sym(1), loader.Sym(ldr.NSym()); s < nsym; s++ {
		if !ldr.AttrCgoExport(s) {
			continue
		}
		extname := ldr.SymExtname(s)
		if !strings.HasPrefix(extname, "._cgoexp_") {
			continue
		}
		if ldr.IsFileLocal(s) {
			continue // Only export non-static symbols
		}

		// Retrieve the name of the initial symbol
		// exported by cgo.