hotspot/src/share/vm/oops/methodDataKlass.hpp
author johnc
Mon, 07 Jun 2010 17:46:04 -0700
changeset 5716 1947993a6161
parent 4584 e2a449e8cc6f
child 5547 f4b087cbb361
permissions -rw-r--r--
6953058: G1: A bigapp crashes with SIGSEGV in compiled code Summary: In C2's G1 post write barrier, the loads of the buffer and index fields from the DirtyCardQueue structure may be moved across a safepoint. Use the current value of "control" in the C2 IR to limit how far these loads can move. Reviewed-by: never, iveresov, kvn
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/*
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 * Copyright 2000-2006 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 methodDataKlass is the klass of a methodDataOop
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class methodDataKlass : 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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  // Testing
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  bool oop_is_methodData() const { return true; }
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  // Allocation
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  DEFINE_ALLOCATE_PERMANENT(methodDataKlass);
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  methodDataOop allocate(methodHandle method, 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 methodDataKlass* cast(klassOop k) {
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    assert(k->klass_part()->oop_is_methodData(), "cast to methodDataKlass");
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    return (methodDataKlass*) 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(methodDataKlass)/wordSize;
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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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  bool oop_is_parsable(oop obj) const;
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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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  // Printing
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  void oop_print_value_on(oop obj, outputStream* st);
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#ifndef PRODUCT
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  void oop_print_on      (oop obj, outputStream* st);
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#endif //PRODUCT
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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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};