Mercurial > jdk8-mips64-public > hotspot / file diff

     1.1 --- a/src/share/vm/memory/threadLocalAllocBuffer.inline.hpp	Sat Jan 09 09:01:41 2010 -0800
     1.2 +++ b/src/share/vm/memory/threadLocalAllocBuffer.inline.hpp	Tue Jan 12 14:56:46 2010 -0800
     1.3 @@ -1,5 +1,5 @@
     1.4  /*
     1.5 - * Copyright 1999-2007 Sun Microsystems, Inc.  All Rights Reserved.
     1.6 + * Copyright 1999-2009 Sun Microsystems, Inc.  All Rights Reserved.
     1.7   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.8   *
     1.9   * This code is free software; you can redistribute it and/or modify it
    1.10 @@ -27,8 +27,13 @@
    1.11    HeapWord* obj = top();
    1.12    if (pointer_delta(end(), obj) >= size) {
    1.13      // successful thread-local allocation
    1.14 -
    1.15 -    DEBUG_ONLY(Copy::fill_to_words(obj, size, badHeapWordVal));
    1.16 +#ifdef ASSERT
    1.17 +    // Skip mangling the space corresponding to the object header to
    1.18 +    // ensure that the returned space is not considered parsable by
    1.19 +    // any concurrent GC thread.
    1.20 +    size_t hdr_size = CollectedHeap::min_fill_size();
    1.21 +    Copy::fill_to_words(obj + hdr_size, size - hdr_size, badHeapWordVal);
    1.22 +#endif // ASSERT
    1.23      // This addition is safe because we know that top is
    1.24      // at least size below end, so the add can't wrap.
    1.25      set_top(obj + size);