src/share/vm/runtime/os.hpp

*** 1,7 ****
  /*
!  * Copyright (c) 1997, 2014, 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.
--- 1,7 ----
  /*
!  * Copyright (c) 1997, 2018, 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.
*** 447,457 ****
--- 447,474 ----
    };
  
    static bool create_thread(Thread* thread,
                              ThreadType thr_type,
                              size_t stack_size = 0);
+ 
+   // The "main thread", also known as "starting thread", is the thread
+   // that loads/creates the JVM via JNI_CreateJavaVM.
    static bool create_main_thread(JavaThread* thread);
+ 
+   // The primordial thread is the initial process thread. The java
+   // launcher never uses the primordial thread as the main thread, but
+   // applications that host the JVM directly may do so. Some platforms
+   // need special-case handling of the primordial thread if it attaches
+   // to the VM.
+   static bool is_primordial_thread(void)
+ #if defined(_WINDOWS) || defined(BSD)
+     // No way to identify the primordial thread.
+     { return false; }
+ #else
+   ;
+ #endif
+ 
    static bool create_attached_thread(JavaThread* thread);
    static void pd_start_thread(Thread* thread);
    static void start_thread(Thread* thread);
  
    static void initialize_thread(Thread* thr);