libgo: update to go1.9

    
    Reviewed-on: https://go-review.googlesource.com/63753

From-SVN: r252767

1 files changed, 4 insertions, 0 deletions

diff --git a/libgo/go/time/sys_unix.go b/libgo/go/time/sys_unix.go
index 4c68bbdc6d1..57152751800 100644
--- a/libgo/go/time/sys_unix.go
+++ b/libgo/go/time/sys_unix.go
@@ -19,6 +19,7 @@ func interrupt() {
 // readFile reads and returns the content of the named file.
 // It is a trivial implementation of ioutil.ReadFile, reimplemented
 // here to avoid depending on io/ioutil or os.
+// It returns an error if name exceeds maxFileSize bytes.
 func readFile(name string) ([]byte, error) {
 	f, err := syscall.Open(name, syscall.O_RDONLY, 0)
 	if err != nil {
@@ -38,6 +39,9 @@ func readFile(name string) ([]byte, error) {
 		if n == 0 || err != nil {
 			break
 		}
+		if len(ret) > maxFileSize {
+			return nil, fileSizeError(name)
+		}
 	}
 	return ret, err
 }