src/share/vm/gc_implementation/shared/vmGCOperations.cpp

*** 1,7 ****
  /*
!  * Copyright (c) 2005, 2010, 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) 2005, 2011, 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.
*** 85,94 ****
--- 85,96 ----
    return skip;
  }
  
  bool VM_GC_Operation::doit_prologue() {
    assert(Thread::current()->is_Java_thread(), "just checking");
+   assert(((_gc_cause != GCCause::_no_gc) &&
+           (_gc_cause != GCCause::_no_cause_specified)), "Illegal GCCause");
  
    acquire_pending_list_lock();
    // If the GC count has changed someone beat us to the collection
    // Get the Heap_lock after the pending_list_lock.
    Heap_lock->lock();