hotspot/src/share/vm/oops/cpCacheKlass.hpp
author ysr
Mon, 07 Feb 2011 22:19:57 -0800
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parent 7397 5b173b4ca846
child 8921 14bfe81f2a9d
permissions -rw-r--r--
6912621: iCMS: Error: assert(_markBitMap.isMarked(addr + 1),"Missing Printezis bit?") Summary: Fix block_size_if_printezis_bits() so it does not expect the bits, only uses them when available. Fix block_size_no_stall() so it does not stall when the bits are missing such cases, letting the caller deal with zero size returns. Constant pool cache oops do not need to be unparsable or conc_unsafe after their klass pointer is installed. Some cosmetic clean-ups and some assertion checking for conc-usafety which, in the presence of class file redefinition, has no a-priori time boundedness, so all GCs must be able to safely deal with putatively conc-unsafe objects in a stop-world pause. Reviewed-by: jmasa, johnc
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/*
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 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef SHARE_VM_OOPS_CPCACHEKLASS_HPP
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#define SHARE_VM_OOPS_CPCACHEKLASS_HPP
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#include "oops/arrayKlass.hpp"
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#include "oops/cpCacheOop.hpp"
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#include "oops/instanceKlass.hpp"
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class constantPoolCacheKlass: public Klass {
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  juint    _alloc_size;        // allocation profiling support
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 public:
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  // Dispatched klass operations
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  bool oop_is_constantPoolCache() const          { return true; }
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  int  oop_size(oop obj) const;
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  int  klass_oop_size() const                    { return object_size(); }
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  // Allocation
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  DEFINE_ALLOCATE_PERMANENT(constantPoolCacheKlass);
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  constantPoolCacheOop allocate(int length, TRAPS);
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  static klassOop create_klass(TRAPS);
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  // Casting from klassOop
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  static constantPoolCacheKlass* cast(klassOop k) {
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    assert(k->klass_part()->oop_is_constantPoolCache(), "cast to constantPoolCacheKlass");
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    return (constantPoolCacheKlass*)k->klass_part();
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  }
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  // Sizing
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  static int header_size()       { return oopDesc::header_size() + sizeof(constantPoolCacheKlass)/HeapWordSize; }
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  int object_size() const        { return align_object_size(header_size()); }
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  // Garbage collection
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  void oop_follow_contents(oop obj);
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  int oop_adjust_pointers(oop obj);
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  // Parallel Scavenge and Parallel Old
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  PARALLEL_GC_DECLS
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  // Iterators
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  int oop_oop_iterate(oop obj, OopClosure* blk);
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  int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr);
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  // Allocation profiling support
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  juint alloc_size() const              { return _alloc_size; }
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  void set_alloc_size(juint n)          { _alloc_size = n; }
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  // Printing
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  void oop_print_value_on(oop obj, outputStream* st);
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  void oop_print_on(oop obj, outputStream* st);
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  // Verification
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  const char* internal_name() const;
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  void oop_verify_on(oop obj, outputStream* st);
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};
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#endif // SHARE_VM_OOPS_CPCACHEKLASS_HPP