func C.GoBytes(unsafe.Pointer, C.int) []byte

As a special case, C.malloc does not call the C library malloc directly
but instead calls a Go helper function that wraps the C library malloc
but guarantees never to return nil. If C's malloc indicates out of memory,
the helper function crashes the program, like when Go itself runs out
of memory. Because C.malloc cannot fail, it has no two-result form
that returns errno.

}

func (w *teststringwriter) WriteString(s string) (int, error) {
	w.writeString += s
	return len(s), nil
}

func (w *teststringwriter) check(t *testing.T, write, writeString string) {
	t.Helper()
	if w.write != write {
		t.Errorf("write: expected %q, got %q", write, w.write)
	}
	if w.writeString != writeString {
		t.Errorf("writeString: expected %q, got %q", writeString, w.writeString)
	}
}

those are treated as two code points.  For simplicity, this document
will use the unqualified term <i>character</i> to refer to a Unicode code point
in the source text.
</p>
<p>
Each code point is distinct; for instance, upper and lower case letters
are different characters.
</p>
<p>
Implementation restriction: For compatibility with other tools, a
compiler may disallow the NUL character (U+0000) in the source text.
</p>
<p>

pkg testing, method (*F) Failed() bool
pkg testing, method (*F) Fatal(...interface{})
pkg testing, method (*F) Fatalf(string, ...interface{})
pkg testing, method (*F) Fuzz(interface{})
pkg testing, method (*F) Helper()
pkg testing, method (*F) Log(...interface{})
pkg testing, method (*F) Logf(string, ...interface{})
pkg testing, method (*F) Name() string
pkg testing, method (*F) Setenv(string, string)

			removeTag := func(v uint64) uint64 { return v }
			if goarch == "arm64" {
				for i := range symtab {
					if symtab[i].Name == "__hwasan_init" {
						// -fsanitize=hwaddress on ARM
						// uses the upper byte of a
						// memory address as a hardware
						// tag. Remove it so that
						// we can find the associated
						// data.
						removeTag = func(v uint64) uint64 { return v &^ (0xff << (64 - 8)) }

pkg syscall, type RawConn interface, Read(func(uintptr) bool) error
pkg syscall, type RawConn interface, Write(func(uintptr) bool) error
pkg testing, method (*B) Helper()
pkg testing, method (*T) Helper()
pkg testing, type TB interface, Helper()
pkg time, method (Duration) Round(Duration) Duration

	os.Setenv("GO_ADDR2LINETEST_IS_ADDR2LINE", "1") // Set for subprocesses to inherit.
	os.Exit(m.Run())
}

// addr2linePath returns the path to the "addr2line" binary to run.
func addr2linePath(t testing.TB) string {
	t.Helper()
	testenv.MustHaveExec(t)

	addr2linePathOnce.Do(func() {
		addr2lineExePath, addr2linePathErr = os.Executable()
	})
	if addr2linePathErr != nil {
		t.Fatal(addr2linePathErr)
	}
	return addr2lineExePath
}

pkg unicode, var Title *RangeTable
pkg unicode, var TurkishCase SpecialCase
pkg unicode, var Ugaritic *RangeTable
pkg unicode, var Unified_Ideograph *RangeTable
pkg unicode, var Upper *RangeTable
pkg unicode, var Vai *RangeTable
pkg unicode, var Variation_Selector *RangeTable
pkg unicode, var White_Space *RangeTable
pkg unicode, var Yi *RangeTable
pkg unicode, var Z *RangeTable

//	string encoding   |  ASCII |     UTF-8 |    binary
//	sub-second times  |     no |       yes |        no
//	sparse files      |     no |       yes |       yes
//
// The table's upper portion shows the [Header] fields, where each format reports
// the maximum number of bytes allowed for each string field and
// the integer type used to store each numeric field

such as <code>name(SB)</code>, but not offsets from symbols,
such as <code>name+4(SB)</code>.
</p>

<p>
Instructions, registers, and assembler directives are always in UPPER CASE to remind you
that assembly programming is a fraught endeavor.
(Exception: the <code>g</code> register renaming on ARM.)
</p>

<p>
In Go object files and binaries, the full name of a symbol is the