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, 9 insertions, 1 deletions

diff --git a/libgo/go/net/cgo_unix.go b/libgo/go/net/cgo_unix.go
index 525c63c18d2..a90aaa904ed 100644
--- a/libgo/go/net/cgo_unix.go
+++ b/libgo/go/net/cgo_unix.go
@@ -114,7 +114,15 @@ func cgoLookupPort(ctx context.Context, network, service string) (port int, err
 }
 
 func cgoLookupServicePort(hints *syscall.Addrinfo, network, service string) (port int, err error) {
-	s := syscall.StringBytePtr(service)
+	s, err := syscall.BytePtrFromString(service)
+	if err != nil {
+		return 0, err
+	}
+	// Lowercase the service name in the memory passed to C.
+	for i := 0; i < len(service); i++ {
+		bp := (*byte)(unsafe.Pointer(uintptr(unsafe.Pointer(s)) + uintptr(i)))
+		*bp = lowerASCII(*bp)
+	}
 	var res *syscall.Addrinfo
 	syscall.Entersyscall()
 	gerrno := libc_getaddrinfo(nil, s, hints, &res)