Replaced strerror() calls with threadsafe strerror_r()

runtime/bin/socket_macos.cc

Index: runtime/bin/socket_macos.cc
diff --git a/runtime/bin/socket_macos.cc b/runtime/bin/socket_macos.cc
index 81b2d023cd625d6e7271d0e7da2bdb5501ff2b30..2e2dbb650a1669559151eae34d956bbb4cf32888 100644
--- a/runtime/bin/socket_macos.cc
+++ b/runtime/bin/socket_macos.cc
@@ -48,7 +48,10 @@ intptr_t Socket::Create(RawAddr addr) {
 
   fd = TEMP_FAILURE_RETRY(socket(addr.ss.ss_family, SOCK_STREAM, 0));
   if (fd < 0) {
-    Log::PrintErr("Error Create: %s\n", strerror(errno));
+    const int kBufferSize = 1024;
+    char error_message[kBufferSize];
+    strerror_r(errno, error_message, kBufferSize);
+    Log::PrintErr("Error Create: %s\n", error_message);
     return -1;
   }
 
@@ -122,7 +125,10 @@ intptr_t Socket::GetPort(intptr_t fd) {
           getsockname(fd,
                       &raw.addr,
                       &size))) {
-    Log::PrintErr("Error getsockname: %s\n", strerror(errno));
+    const int kBufferSize = 1024;
+    char error_message[kBufferSize];
+    strerror_r(errno, error_message, kBufferSize);
+    Log::PrintErr("Error getsockname: %s\n", error_message);
     return 0;
   }
   return SocketAddress::GetAddrPort(&raw);
@@ -137,7 +143,10 @@ bool Socket::GetRemotePeer(intptr_t fd, char *host, intptr_t *port) {
           getpeername(fd,
                       &raw.addr,
                       &size))) {
-    Log::PrintErr("Error getpeername: %s\n", strerror(errno));
+    const int kBufferSize = 1024;
+    char error_message[kBufferSize];
+    strerror_r(errno, error_message, kBufferSize);
+    Log::PrintErr("Error getpeername: %s\n", error_message);
     return false;
   }
   const void* src;
@@ -150,7 +159,10 @@ bool Socket::GetRemotePeer(intptr_t fd, char *host, intptr_t *port) {
                 src,
                 host,
                 INET_ADDRSTRLEN) == NULL) {
-    Log::PrintErr("Error inet_ntop: %s\n", strerror(errno));
+    const int kBufferSize = 1024;
+    char error_message[kBufferSize];
+    strerror_r(errno, error_message, kBufferSize);
+    Log::PrintErr("Error inet_ntop: %s\n", error_message);
     return false;
   }
   *port = SocketAddress::GetAddrPort(&raw);