Update to NSS 3.15.5 and NSPR 4.10.3.

nspr/pr/src/md/unix/unix.c

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #include "primpl.h"
 
 #include <string.h>
 #include <signal.h>
 #include <unistd.h>
@@ skipping 3596 matching lines @@
             _PR_MD_MAP_MMAP_ERROR(_MD_ERRNO());
         addr = NULL;
     }
     return addr;
 }
 
 PRStatus _MD_MemUnmap(void *addr, PRUint32 len)
 {
     if (munmap(addr, len) == 0) {
         return PR_SUCCESS;
-    } else {
-    if (errno == EINVAL) {
-            PR_SetError(PR_INVALID_ARGUMENT_ERROR, errno);
-    } else {
-        PR_SetError(PR_UNKNOWN_ERROR, errno);
     }
-        return PR_FAILURE;
-    }
+    _PR_MD_MAP_DEFAULT_ERROR(errno);
+    return PR_FAILURE;
 }
 
 PRStatus _MD_CloseFileMap(PRFileMap *fmap)
 {
     if ( PR_TRUE == fmap->md.isAnonFM ) {
         PRStatus rc = PR_Close( fmap->fd );
         if ( PR_FAILURE == rc ) {
             PR_LOG( _pr_io_lm, PR_LOG_DEBUG,
                 ("_MD_CloseFileMap(): error closing anonymnous file map osfd"));
             return PR_FAILURE;
         }
     }
     PR_DELETE(fmap);
     return PR_SUCCESS;
 }
 
+PRStatus _MD_SyncMemMap(
+    PRFileDesc *fd,
+    void *addr,
+    PRUint32 len)
+{
+    /* msync(..., MS_SYNC) alone is sufficient to flush modified data to disk
+     * synchronously. It is not necessary to call fsync. */
+    if (msync(addr, len, MS_SYNC) == 0) {
+        return PR_SUCCESS;
+    }
+    _PR_MD_MAP_DEFAULT_ERROR(errno);
+    return PR_FAILURE;
+}
+
 #if defined(_PR_NEED_FAKE_POLL)
 
 /*
  * Some platforms don't have poll().  For easier porting of code
  * that calls poll(), we emulate poll() using select().
  */
 
 int poll(struct pollfd *filedes, unsigned long nfds, int timeout)
 {
     int i;
@@ skipping 114 matching lines @@
                 rv++;
             }
         }
         PR_ASSERT(rv > 0);
     }
     PR_ASSERT(-1 != timeout || rv != 0);
 
     return rv;
 }
 #endif /* _PR_NEED_FAKE_POLL */