Make opendir test for EINTR again and make NO_RETRY_EXPECTED check in release mode.

runtime/platform/signal_blocker.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef PLATFORM_SIGNAL_BLOCKER_H_
 #define PLATFORM_SIGNAL_BLOCKER_H_
 
 #include "platform/globals.h"
 
 #if defined(TARGET_OS_WINDOWS)
@@ skipping 55 matching lines @@
 
 // This is a version of TEMP_FAILURE_RETRY which does not use the value
 // returned from the expression.
 #define VOID_TEMP_FAILURE_RETRY(expression)                                    \
     (static_cast<void>(TEMP_FAILURE_RETRY(expression)))
 
 // This macro can be used to insert checks that a call is made, that
 // was expected to not return EINTR, but did it anyway.
 #define NO_RETRY_EXPECTED(expression)                                          \
     ({ intptr_t __result = (expression);                                       \
-       ASSERT(__result != -1L || errno != EINTR);                              \
+       if (__result == -1L && errno == EINTR) {                                \
+         FATAL("Unexpected EINTR errno");                                      \
+       }                                                                       \
        __result; })
 
 #define VOID_NO_RETRY_EXPECTED(expression)                                     \
     (static_cast<void>(NO_RETRY_EXPECTED(expression)))
 
 // Define to check in debug mode, if a signal is currently being blocked.
 #define CHECK_IS_BLOCKING(signal)                                              \
     ({ sigset_t signal_mask;                                                   \
        int __r = pthread_sigmask(SIG_BLOCK, NULL, &signal_mask);               \
        USE(__r);                                                               \
@@ skipping 10 matching lines @@
          __result = (expression);                                              \
        } while ((__result == -1L) && (errno == EINTR));                        \
        __result; })
 
 #define VOID_TEMP_FAILURE_RETRY_NO_SIGNAL_BLOCKER(expression)                  \
     (static_cast<void>(TEMP_FAILURE_RETRY_NO_SIGNAL_BLOCKER(expression)))
 
 }  // namespace dart
 
 #endif  // PLATFORM_SIGNAL_BLOCKER_H_