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, 9 insertions, 0 deletions

diff --git a/libgo/go/internal/poll/sendfile_windows.go b/libgo/go/internal/poll/sendfile_windows.go
index c1a2d6d..4a15b75 100644
--- a/libgo/go/internal/poll/sendfile_windows.go
+++ b/libgo/go/internal/poll/sendfile_windows.go
@@ -8,6 +8,15 @@ import "syscall"
 
 // SendFile wraps the TransmitFile call.
 func SendFile(fd *FD, src syscall.Handle, n int64) (int64, error) {
+	ft, err := syscall.GetFileType(src)
+	if err != nil {
+		return 0, err
+	}
+	// TransmitFile does not work with pipes
+	if ft == syscall.FILE_TYPE_PIPE {
+		return 0, syscall.ESPIPE
+	}
+
 	if err := fd.writeLock(); err != nil {
 		return 0, err
 	}