libgo: update to Go1.10beta1

    
    Update the Go library to the 1.10beta1 release.
    
    Requires a few changes to the compiler for modifications to the map
    runtime code, and to handle some nowritebarrier cases in the runtime.
    
    Reviewed-on: https://go-review.googlesource.com/86455

gotools/:
	* Makefile.am (go_cmd_vet_files): New variable.
	(go_cmd_buildid_files, go_cmd_test2json_files): New variables.
	(s-zdefaultcc): Change from constants to functions.
	(noinst_PROGRAMS): Add vet, buildid, and test2json.
	(cgo$(EXEEXT)): Link against $(LIBGOTOOL).
	(vet$(EXEEXT)): New target.
	(buildid$(EXEEXT)): New target.
	(test2json$(EXEEXT)): New target.
	(install-exec-local): Install all $(noinst_PROGRAMS).
	(uninstall-local): Uninstasll all $(noinst_PROGRAMS).
	(check-go-tool): Depend on $(noinst_PROGRAMS).  Copy down
	objabi.go.
	(check-runtime): Depend on $(noinst_PROGRAMS).
	(check-cgo-test, check-carchive-test): Likewise.
	(check-vet): New target.
	(check): Depend on check-vet.  Look at cmd_vet-testlog.
	(.PHONY): Add check-vet.
	* Makefile.in: Rebuild.

From-SVN: r256365

1 files changed, 4 insertions, 32 deletions

diff --git a/libgo/go/time/sys_unix.go b/libgo/go/time/sys_unix.go
index 5715275..3827965 100644
--- a/libgo/go/time/sys_unix.go
+++ b/libgo/go/time/sys_unix.go
@@ -16,36 +16,6 @@ func interrupt() {
 	syscall.Kill(syscall.Getpid(), syscall.SIGCHLD)
 }
 
-// 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 {
-		return nil, err
-	}
-	defer syscall.Close(f)
-	var (
-		buf [4096]byte
-		ret []byte
-		n   int
-	)
-	for {
-		n, err = syscall.Read(f, buf[:])
-		if n > 0 {
-			ret = append(ret, buf[:n]...)
-		}
-		if n == 0 || err != nil {
-			break
-		}
-		if len(ret) > maxFileSize {
-			return nil, fileSizeError(name)
-		}
-	}
-	return ret, err
-}
-
 func open(name string) (uintptr, error) {
 	fd, err := syscall.Open(name, syscall.O_RDONLY, 0)
 	if err != nil {
@@ -54,6 +24,10 @@ func open(name string) (uintptr, error) {
 	return uintptr(fd), nil
 }
 
+func read(fd uintptr, buf []byte) (int, error) {
+	return syscall.Read(int(fd), buf)
+}
+
 func closefd(fd uintptr) {
 	syscall.Close(int(fd))
 }
@@ -78,5 +52,3 @@ func preadn(fd uintptr, buf []byte, off int) error {
 	}
 	return nil
 }
-
-func isNotExist(err error) bool { return err == syscall.ENOENT }