Always mark stdout as blocking when using 'print'.

runtime/bin/builtin_natives.cc

Index: runtime/bin/builtin_natives.cc
diff --git a/runtime/bin/builtin_natives.cc b/runtime/bin/builtin_natives.cc
index 07cc545380ee1341a9702ec39a6c90607f82c33a..80844970dfdce2206c604a829b1ab45166994337 100644
--- a/runtime/bin/builtin_natives.cc
+++ b/runtime/bin/builtin_natives.cc
@@ -13,6 +13,7 @@
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
 #include "bin/io_natives.h"
+#include "bin/platform.h"
 
 namespace dart {
 namespace bin {
@@ -108,12 +109,10 @@ void FUNCTION_NAME(Logger_PrintString)(Dart_NativeArguments args) {
     // an isolate gets interrupted by the embedder in the middle of
     // Dart_StringToUTF8?  We need to make sure not to swallow the
     // interrupt.
-    fputs(Dart_GetError(result), stdout);
+    Platform::PrintBlocking(stdout, "%s\n", Dart_GetError(result));
   } else {
-    fwrite(chars, sizeof(*chars), length, stdout);
+    Platform::PrintBlocking(stdout, "%.*s\n", length, chars);

[Søren Gjesse, 2013/10/01 07:16:39]

I was not aware of the * for precision.

[Anders Johnsen, 2013/10/01 09:05:21]

Let's see if all the platforms supports it :)

   }
-  fputc('\n', stdout);
-  fflush(stdout);
 }
 
 }  // namespace bin