for _, c := range s {
			b = append(b, uint16(c))
			if c != rune(uint16(c)) {
				t.Errorf("bad test: stringW can't handle >16 bit runes")
			}
		}
		b = append(b, 0)
		r := runtime.GostringW(b)
		if r != s {
			t.Errorf("gostringW(%v) = %s, want %s", b, r, s)
		}
	}
}

func TestLargeStringConcat(t *testing.T) {
	output := runTestProg(t, "testprog", "stringconcat")

// This is exported via linkname to assembly in syscall (for Plan9) and cgo.
//
//go:linkname gostring
func gostring(p *byte) string {
	l := findnull(p)
	if l == 0 {
		return ""
	}
	s, b := rawstring(l)
	memmove(unsafe.Pointer(&b[0]), unsafe.Pointer(p), uintptr(l))
	return s
}

// internal_syscall_gostring is a version of gostring for internal/syscall/unix.
//

func g(a T) {
	// test load of unaligned
	// 8 byte gostring, store
	// to unaligned static
	copy(a.y[:], gostring2)
}

func main() {
	var t1, t2 T

	// test copy to automatic storage,
	// load of unaligned gostring.
	copy(st.y[:], gostring2)
	copy(t1.y[:], st.y[:])
	copy(t2.y[:], gostring3)
	// test initialization of params
	if !f(t1, 'a', t2) {
		// gostring1 added so it has a use
		fmt.Printf("FAIL: %s\n", gostring1)

func MemclrBytes(b []byte) {
	s := (*slice)(unsafe.Pointer(&b))
	memclrNoHeapPointers(s.array, uintptr(s.len))
}

const HashLoad = hashLoad

// entry point for testing
func GostringW(w []uint16) (s string) {
	systemstack(func() {
		s = gostringw(&w[0])
	})
	return
}

var Open = open
var Close = closefd
var Read = read
var Write = write

func Envs() []string     { return envs }

		if p[i] == 0 {
			// empty string marks the end
			if i == from {
				break
			}
			from = i + 1
			n++
		}
	}
	envs = make([]string, n)

	for i := range envs {
		envs[i] = gostringw(&p[0])
		for p[0] != 0 {
			p = p[1:]
		}
		p = p[1:] // skip nil byte
	}

	stdcall1(_FreeEnvironmentStringsW, uintptr(strings))

	}
	return printUint16(uint16(c))
}

// GoString implements fmt.GoStringer.GoString.
func (c Class) GoString() string {
	if n, ok := classNames[c]; ok {
		return "dnsmessage." + n
	}
	return printUint16(uint16(c))
}

// An OpCode is a DNS operation code.
type OpCode uint16

// GoString implements fmt.GoStringer.GoString.
func (o OpCode) GoString() string {
	return printUint16(uint16(o))
}

Emmanuel Odeke <******@****.***> 1460323946 -0700

	GENERIC_RELOC_PB_LA_PTR      RelocTypeGeneric = 3
	GENERIC_RELOC_LOCAL_SECTDIFF RelocTypeGeneric = 4
	GENERIC_RELOC_TLV            RelocTypeGeneric = 5
)

func (r RelocTypeGeneric) GoString() string { return "macho." + r.String() }

type RelocTypeX86_64 int

const (
	X86_64_RELOC_UNSIGNED   RelocTypeX86_64 = 0
	X86_64_RELOC_SIGNED     RelocTypeX86_64 = 1
	X86_64_RELOC_BRANCH     RelocTypeX86_64 = 2

C.sizeof_struct_stat.

A C function may be declared in the Go file with a parameter type of
the special name _GoString_. This function may be called with an
ordinary Go string value. The string length, and a pointer to the
string contents, may be accessed by calling the C functions

	size_t _GoStringLen(_GoString_ s);
	const char *_GoStringPtr(_GoString_ s);

These functions are only available in the preamble, not in other C

import (
	"fmt"
)

func init() {
	register("CgoPanicDeadlock", CgoPanicDeadlock)
}

type cgoError struct{}

func (cgoError) Error() string {
	fmt.Print("") // necessary to trigger the deadlock
	return C.GoString(C.geterror())
}

func CgoPanicDeadlock() {
	panic(cgoError{})