src/share/vm/compiler/directivesParser.cpp

rev 13166 : read/write APIs in class os shall return ssize_t

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.

@@ -91,13 +91,13 @@
   if (os::stat(filename, &st) == 0) {
     // found file, open it
     int file_handle = os::open(filename, 0, 0);
     if (file_handle != -1) {
       // read contents into resource array
-      char* buffer = NEW_RESOURCE_ARRAY(char, st.st_size+1);
-      size_t num_read = os::read(file_handle, (char*) buffer, st.st_size);
-      buffer[num_read] = '\0';
+      char* buffer = NEW_RESOURCE_ARRAY(char, st.st_size + 1);
+      ssize_t num_read = os::read(file_handle, (char*) buffer, st.st_size);
+      buffer[num_read < 0 ? 0 : (size_t)num_read] = '\0';
       // close file
       os::close(file_handle);
       return parse_string(buffer, stream) > 0;
     }
   }