testenv.MustHaveGoBuild(t)
	testenv.MustHaveCGO(t)

	goos, err := goEnv("GOOS")
	if err != nil {
		t.Fatal(err)
	}
	goarch, err := goEnv("GOARCH")
	if err != nil {
		t.Fatal(err)
	}
	// The msan tests require support for the -msan option.
	if !compilerRequiredTsanVersion(goos, goarch) {
		t.Skipf("skipping on %s/%s; compiler version for -tsan option is too old.", goos, goarch)
	}

	t.Parallel()
	requireOvercommit(t)

(example: source_windows_amd64.go) where GOOS and GOARCH represent
any known operating system and architecture values respectively, then
the file is considered to have an implicit build constraint requiring
those terms (in addition to any explicit constraints in the file).

Using GOOS=android matches build tags and files as for GOOS=linux
in addition to android tags and files.

	case "ip", "ip4", "ip6":
		switch runtime.GOOS {
		case "plan9":
			return false
		default:
			if os.Getuid() != 0 {
				return false
			}
		}
	case "unix", "unixgram":
		switch runtime.GOOS {
		case "android", "ios", "plan9", "windows":
			return false
		case "aix":
			return unixEnabledOnAIX
		}
	case "unixpacket":
		switch runtime.GOOS {
		case "aix", "android", "darwin", "ios", "plan9", "windows":

	for _, p := range platform.List {
		broken := platform.Broken(p.GOOS, p.GOARCH)
		if broken && !*brokenFlag {
			continue
		}
		if *jsonFlag {
			results = append(results, jsonResult{
				GOOS:         p.GOOS,
				GOARCH:       p.GOARCH,
				CgoSupported: platform.CgoSupported(p.GOOS, p.GOARCH),
				FirstClass:   platform.FirstClass(p.GOOS, p.GOARCH),
				Broken:       broken,
			})
		}
	}

	case "ip+nopriv":
		// This is an internal network name for testing on the
		// package net of the standard library.
		switch runtime.GOOS {
		case "android", "fuchsia", "hurd", "ios", "js", "nacl", "plan9", "wasip1", "windows":
			return false
		}
	case "ip", "ip4", "ip6":
		switch runtime.GOOS {
		case "fuchsia", "hurd", "js", "nacl", "plan9", "wasip1":
			return false
		default:
			if os.Getuid() != 0 {
				return false

			if nerr, ok := err.(Error); (!ok || !nerr.Timeout()) && runtime.GOOS != "windows" { // Windows returns WSAEMSGSIZE
				t.Fatal(err)
			}
		}
	}
}

func TestUDPReadSizeError(t *testing.T) {
	switch runtime.GOOS {
	case "plan9":
		t.Skipf("not supported on %s", runtime.GOOS)
	}
	if !testableNetwork("udp") {
		t.Skipf("skipping: udp not available")
	}

go list asdfasdfasdf  # succeeds because of -e
go list runtime
stdout '[\\/]runtime$'

env GOFLAGS=-race OLDGOARCH=$GOARCH OLDGOOS=$GOOS GOARCH=386 GOOS=linux
! go list runtime
stderr 'race is not supported on linux/386'

env GOARCH=$OLDGOARCH GOOS=$OLDGOOS

# go env succeeds even though -f={{.Dir}} is inappropriate
go env

# bad flags are diagnosed
env GOFLAGS=-typoflag
! go list runtime

	InstallSuffix string   `json:",omitempty"` // suffix to use in the name of the install dir
}

func newContext(c *build.Context) *Context {
	return &Context{
		GOARCH:        c.GOARCH,
		GOOS:          c.GOOS,
		GOROOT:        c.GOROOT,
		GOPATH:        c.GOPATH,
		CgoEnabled:    c.CgoEnabled,
		UseAllFiles:   c.UseAllFiles,
		Compiler:      c.Compiler,
		BuildTags:     c.BuildTags,
		ToolTags:      c.ToolTags,

// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.

//go:build aix

package goos

const GOOS = `aix`

const IsAix = 1
const IsAndroid = 0
const IsDarwin = 0
const IsDragonfly = 0
const IsFreebsd = 0
const IsHurd = 0
const IsIllumos = 0
const IsIos = 0
const IsJs = 0
const IsLinux = 0
const IsNacl = 0
const IsNetbsd = 0
const IsOpenbsd = 0
const IsPlan9 = 0
const IsSolaris = 0
const IsWasip1 = 0

// Code generated by gengoos.go using 'go generate'. DO NOT EDIT.

//go:build dragonfly

package goos

const GOOS = `dragonfly`

const IsAix = 0
const IsAndroid = 0
const IsDarwin = 0
const IsDragonfly = 1
const IsFreebsd = 0
const IsHurd = 0
const IsIllumos = 0
const IsIos = 0
const IsJs = 0
const IsLinux = 0
const IsNacl = 0
const IsNetbsd = 0
const IsOpenbsd = 0
const IsPlan9 = 0
const IsSolaris = 0