libgo: update to Go 1.8 release candidate 1

    
    Compiler changes:
      * Change map assignment to use mapassign and assign value directly.
      * Change string iteration to use decoderune, faster for ASCII strings.
      * Change makeslice to take int, and use makeslice64 for larger values.
      * Add new noverflow field to hmap struct used for maps.
    
    Unresolved problems, to be fixed later:
      * Commented out test in go/types/sizes_test.go that doesn't compile.
      * Commented out reflect.TestStructOf test for padding after zero-sized field.
    
    Reviewed-on: https://go-review.googlesource.com/35231

gotools/:
	Updates for Go 1.8rc1.
	* Makefile.am (go_cmd_go_files): Add bug.go.
	(s-zdefaultcc): Write defaultPkgConfig.
	* Makefile.in: Rebuild.

From-SVN: r244456

1 files changed, 13 insertions, 14 deletions

diff --git a/libgo/go/net/dnsname_test.go b/libgo/go/net/dnsname_test.go
index bc777b8..e0f786d 100644
--- a/libgo/go/net/dnsname_test.go
+++ b/libgo/go/net/dnsname_test.go
@@ -32,14 +32,12 @@ var dnsNameTests = []dnsNameTest{
 
 func emitDNSNameTest(ch chan<- dnsNameTest) {
 	defer close(ch)
-	var char59 = ""
 	var char63 = ""
-	var char64 = ""
-	for i := 0; i < 59; i++ {
-		char59 += "a"
+	for i := 0; i < 63; i++ {
+		char63 += "a"
 	}
-	char63 = char59 + "aaaa"
-	char64 = char63 + "a"
+	char64 := char63 + "a"
+	longDomain := strings.Repeat(char63+".", 5) + "example"
 
 	for _, tc := range dnsNameTests {
 		ch <- tc
@@ -47,14 +45,15 @@ func emitDNSNameTest(ch chan<- dnsNameTest) {
 
 	ch <- dnsNameTest{char63 + ".com", true}
 	ch <- dnsNameTest{char64 + ".com", false}
-	// 255 char name is fine:
-	ch <- dnsNameTest{char59 + "." + char63 + "." + char63 + "." +
-		char63 + ".com",
-		true}
-	// 256 char name is bad:
-	ch <- dnsNameTest{char59 + "a." + char63 + "." + char63 + "." +
-		char63 + ".com",
-		false}
+
+	// Remember: wire format is two octets longer than presentation
+	// (length octets for the first and [root] last labels).
+	// 253 is fine:
+	ch <- dnsNameTest{longDomain[len(longDomain)-253:], true}
+	// A terminal dot doesn't contribute to length:
+	ch <- dnsNameTest{longDomain[len(longDomain)-253:] + ".", true}
+	// 254 is bad:
+	ch <- dnsNameTest{longDomain[len(longDomain)-254:], false}
 }
 
 func TestDNSName(t *testing.T) {