t.Fatalf("%v: %v:\n%s", link.Args, err, out)
	}
}

var testXFlagSrc = `
package main
var X = "hello"
var Z = [99999]int{99998:12345} // make it large enough to be mmaped
func main() { println(X) }
`

func TestXFlag(t *testing.T) {
	testenv.MustHaveGoBuild(t)

	t.Parallel()

	tmpdir := t.TempDir()

	src := filepath.Join(tmpdir, "main.go")

// current status of the push.
func (ps *PushContext) UpdateMetrics() {
	ps.proxyStatusMutex.RLock()
	defer ps.proxyStatusMutex.RUnlock()

	for _, pm := range metrics {
		mmap := ps.ProxyStatus[pm.Name()]
		pm.Record(float64(len(mmap)))
	}
}

// It is called after virtual service short host name is resolved to FQDN
func virtualServiceDestinations(v *networking.VirtualService) map[string]sets.Set[int] {

//go:nosplit
func findObject(p, refBase, refOff uintptr) (base uintptr, s *mspan, objIndex uintptr) {
	s = spanOf(p)
	// If s is nil, the virtual address has never been part of the heap.
	// This pointer may be to some mmap'd region, so we allow it.
	if s == nil {
		if (GOARCH == "amd64" || GOARCH == "arm64") && p == clobberdeadPtr && debug.invalidptr != 0 {
			// Crash if clobberdeadPtr is seen. Only on AMD64 and ARM64 for now,

	runtime.ExitSyscall()
	n = int(r0)
	if int64(r0) == -1 {
		err = errnoErr2(e1, e2)
	}
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) {
	runtime.EnterSyscall()

				writeBlock(ctxt, o, ldr, syms, addr, size, pad)
				wg.Done()
				<-sem
			}(o, ldr, syms, addr, length, pad)
		} else { // output not mmaped, don't parallelize.
			writeBlock(ctxt, out, ldr, syms, addr, length, pad)
		}

		// Prepare for the next loop.
		if idx != -1 {
			syms = syms[idx+1:]
		}
		written += length

	f, err := elf.Open(libpath)
	if err != nil {
		Errorf(nil, "cannot open shared library: %s", libpath)
		return
	}
	// Keep the file open as decodetypeGcprog needs to read from it.
	// TODO: fix. Maybe mmap the file.
	//defer f.Close()

	hash, err := readnote(f, ELF_NOTE_GO_NAME, ELF_NOTE_GOABIHASH_TAG)
	if err != nil {
		Errorf(nil, "cannot read ABI hash from shared library %s: %v", libpath, err)
		return

}

func (l *Loader) AttrCgoExport(i Sym) bool {
	return l.AttrCgoExportDynamic(i) || l.AttrCgoExportStatic(i)
}

// AttrReadOnly returns true for a symbol whose underlying data
// is stored via a read-only mmap.
func (l *Loader) AttrReadOnly(i Sym) bool {
	if v, ok := l.attrReadOnly[i]; ok {
		return v
	}
	if l.IsExternal(i) {
		pp := l.getPayload(i)
		if pp.objidx != 0 {

			case ir.OMIN:
				name = "fmin32"
			case ir.OMAX:
				name = "fmax32"
			}
		case types.TFLOAT64:
			switch n.Op() {
			case ir.OMIN:
				name = "fmin64"
			case ir.OMAX:
				name = "fmax64"
			}
		case types.TSTRING:
			switch n.Op() {
			case ir.OMIN:
				name = "strmin"
			case ir.OMAX:
				name = "strmax"
			}
		}
		fn := typecheck.LookupRuntimeFunc(name)