hotspot/src/share/vm/oops/constMethodKlass.hpp
author jmasa
Sun, 11 Jan 2009 16:58:24 -0800
changeset 1894 5c343868d071
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child 2105 347008ce7984
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6692899: CMS: many vm.parallel_class_loading tests fail with assert "missing Printezis mark" Summary: The CMS concurrent precleaning and concurrent marking phases should work around classes that are undergoing redefinition. Reviewed-by: ysr, dcubed
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/*
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 * Copyright 2003-2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 *
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 */
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// A constMethodKlass is the klass of a constMethodOop
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class constMethodKlass : public Klass {
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  friend class VMStructs;
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private:
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  juint    _alloc_size;        // allocation profiling support
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public:
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  // Testing
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  bool oop_is_constMethod() const { return true; }
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  virtual bool oop_is_parsable(oop obj) const;
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  virtual bool oop_is_conc_safe(oop obj) const;
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  // Allocation
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  DEFINE_ALLOCATE_PERMANENT(constMethodKlass);
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  constMethodOop allocate(int byte_code_size, int compressed_line_number_size,
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                          int localvariable_table_length,
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                          int checked_exceptions_length,
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                          bool is_conc_safe,
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                          TRAPS);
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  static klassOop create_klass(TRAPS);
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  // Sizing
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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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  // Casting from klassOop
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  static constMethodKlass* cast(klassOop k) {
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    assert(k->klass_part()->oop_is_constMethod(), "cast to constMethodKlass");
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    return (constMethodKlass*) k->klass_part();
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  }
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  // Sizing
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  static int header_size() {
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    return oopDesc::header_size() + sizeof(constMethodKlass)/HeapWordSize;
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  }
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  int object_size() const {
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    return align_object_size(header_size());
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  }
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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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  // 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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  // 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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#ifndef PRODUCT
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  // Printing
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  void oop_print_on      (oop obj, outputStream* st);
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  void oop_print_value_on(oop obj, outputStream* st);
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#endif
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  // Verify operations
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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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  bool oop_partially_loaded(oop obj) const;
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  void oop_set_partially_loaded(oop obj);
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};