if i == len(uname.Version)-1 {
				uname.Version[i] = 0
			} else {
				uname.Version[i] = ' '
			}
		}
	}

	mib = []_C_int{CTL_HW, HW_MACHINE}
	n = unsafe.Sizeof(uname.Machine)
	if err := sysctl(mib, &uname.Machine[0], &n, nil, 0); err != nil {
		return err
	}

	return nil
}

func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
	if raceenabled {

	go func() {
		runcheck(t, source, golden, mode)
		cc <- 0
	}()

	// wait with timeout
	select {
	case <-time.After(10 * time.Second): // plenty of a safety margin, even for very slow machines
		// test running past time out
		t.Errorf("%s: running too slowly", source)
	case <-cc:
		// test finished within allotted time margin
	}
}

type entry struct {
	source, golden string

	case sys.MIPS, sys.MIPS64:
		eh.Machine = uint16(elf.EM_MIPS)
	case sys.Loong64:
		eh.Machine = uint16(elf.EM_LOONGARCH)
	case sys.ARM:
		eh.Machine = uint16(elf.EM_ARM)
	case sys.AMD64:
		eh.Machine = uint16(elf.EM_X86_64)
	case sys.ARM64:
		eh.Machine = uint16(elf.EM_AARCH64)
	case sys.I386:
		eh.Machine = uint16(elf.EM_386)
	case sys.PPC64:
		eh.Machine = uint16(elf.EM_PPC64)
	case sys.RISCV64:

//
// It is safe for multiple processes on a single machine to use the
// same cache directory in a local file system simultaneously.
// They will coordinate using operating system file locks and may
// duplicate effort but will not corrupt the cache.
//
// However, it is NOT safe for multiple processes on different machines
// to share a cache directory (for example, if the directory were stored

====

=== Selecting toolchains by virtual machine implementation

If your project requires a specific implementation, you can filter based on the implementation as well.
Currently available implementations to choose from are:

`VENDOR_SPECIFIC`::
Acts as a placeholder and matches any implementation from any vendor (e.g. hotspot, zulu, ...)
`J9`::
Matches only virtual machine implementations using the OpenJ9/IBM J9 runtime engine.

	ADD	$16, R13
	MOVM.IA.W (R13), [R4-R11]

	RET

TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
	B	runtime·armPublicationBarrier(SB)

// TODO(jsing): OpenBSD only supports GOARM=7 machines... this
// should not be needed, however the linker still allows GOARM=5
// on this platform.
TEXT runtime·read_tls_fallback(SB),NOSPLIT|NOFRAME,$0
	MOVM.WP	[R1, R2, R3, R12], (R13)
	MOVW	$330, R12		// sys___get_tcb

// doesn't cause a crash at startup. See issue 38474.
func TestBigGOMAXPROCS(t *testing.T) {
	t.Parallel()
	output := runTestProg(t, "testprog", "NonexistentTest", "GOMAXPROCS=1024")
	// Ignore error conditions on small machines.
	for _, errstr := range []string{
		"failed to create new OS thread",
		"cannot allocate memory",
	} {
		if strings.Contains(output, errstr) {
			t.Skipf("failed to create 1024 threads")
		}
	}

	// so we really only need to run this check once anywhere to get adequate coverage.
	// To help developers avoid trybot-only failures, we try to run on typical developer machines
	// which is darwin,linux,windows/amd64 and darwin/arm64.
	//
	// The same logic applies to the release notes that correspond to each api/next file.

        config.description("is annotated with @${config.annotatedWith} but missing a normalization strategy")
            .reason("If you don't declare the normalization, outputs can't be re-used between machines or locations on the same machine, therefore caching efficiency drops significantly")
            .solution("Declare the normalization strategy by annotating the property with either @PathSensitive, @Classpath or @CompileClasspath")
    }

// provided Buffers, else it should report a non-nil error.
type buffersWriter interface {
	writeBuffers(*Buffers) (int64, error)
}

// Buffers contains zero or more runs of bytes to write.
//
// On certain machines, for certain types of connections, this is
// optimized into an OS-specific batch write operation (such as
// "writev").
type Buffers [][]byte

var (
	_ io.WriterTo = (*Buffers)(nil)