Replaced strerror() calls with threadsafe strerror_r()

runtime/bin/eventhandler_linux.cc

 // Copyright (c) 2012, 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.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_LINUX)
 
 #include "bin/eventhandler.h"
 
 #include <errno.h>  // NOLINT
@@ skipping 302 matching lines @@
           // recv to peek for whether the other end of the socket
           // actually closed.
           char buffer;
           ssize_t bytesPeeked =
               TEMP_FAILURE_RETRY(recv(sd->fd(), &buffer, 1, MSG_PEEK));
           ASSERT(EAGAIN == EWOULDBLOCK);
           if (bytesPeeked == 0) {
             event_mask = (1 << kCloseEvent);
             sd->MarkClosedRead();
           } else if (errno != EWOULDBLOCK) {
-            Log::PrintErr("Error recv: %s\n", strerror(errno));
+            const int kBufferSize = 1024;
+            char error_buf[kBufferSize];
+            Log::PrintErr("Error recv: %s\n",
+                          strerror_r(errno, error_buf, kBufferSize));
           }
         }
       }
     }
 
     if ((events & EPOLLOUT) != 0) {
       if ((events & EPOLLERR) != 0) {
         event_mask = (1 << kErrorEvent);
         sd->MarkClosedWrite();
       } else {
@@ skipping 109 matching lines @@
 
 uint32_t EventHandlerImplementation::GetHashmapHashFromFd(intptr_t fd) {
   // The hashmap does not support keys with value 0.
   return dart::Utils::WordHash(fd + 1);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_LINUX)