hotspot/src/share/vm/opto/locknode.hpp
author kvn
Wed, 03 Dec 2008 13:41:37 -0800
changeset 1613 be097ec639a2
parent 670 ddf3e9583f2f
child 5547 f4b087cbb361
permissions -rw-r--r--
6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now") Summary: Create new "eliminated" BoxLock node for monitor debug info when corresponding locks are eliminated. Reviewed-by: never
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/*
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 * Copyright 1999-2008 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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//------------------------------BoxLockNode------------------------------------
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class BoxLockNode : public Node {
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public:
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  const int _slot;
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  RegMask   _inmask;
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  bool _is_eliminated;    // indicates this lock was safely eliminated
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  BoxLockNode( int lock );
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  virtual int Opcode() const;
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  virtual void emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const;
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  virtual uint size(PhaseRegAlloc *ra_) const;
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  virtual const RegMask &in_RegMask(uint) const;
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  virtual const RegMask &out_RegMask() const;
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  virtual uint size_of() const;
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  virtual uint hash() const;
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  virtual uint cmp( const Node &n ) const;
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  virtual const class Type *bottom_type() const { return TypeRawPtr::BOTTOM; }
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  virtual uint ideal_reg() const { return Op_RegP; }
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  static OptoReg::Name stack_slot(Node* box_node);
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  bool is_eliminated()  { return _is_eliminated; }
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  // mark lock as eliminated.
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  void set_eliminated() { _is_eliminated = true; }
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#ifndef PRODUCT
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  virtual void format( PhaseRegAlloc *, outputStream *st ) const;
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  virtual void dump_spec(outputStream *st) const { st->print("  Lock %d",_slot); }
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#endif
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};
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//------------------------------FastLockNode-----------------------------------
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class FastLockNode: public CmpNode {
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private:
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  BiasedLockingCounters* _counters;
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public:
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  FastLockNode(Node *ctrl, Node *oop, Node *box) : CmpNode(oop,box) {
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    init_req(0,ctrl);
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    init_class_id(Class_FastLock);
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    _counters = NULL;
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  }
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  Node* obj_node() const { return in(1); }
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  Node* box_node() const { return in(2); }
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  // FastLock and FastUnlockNode do not hash, we need one for each correspoding
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  // LockNode/UnLockNode to avoid creating Phi's.
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  virtual uint hash() const ;                  // { return NO_HASH; }
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  virtual uint cmp( const Node &n ) const ;    // Always fail, except on self
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  virtual int Opcode() const;
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  virtual const Type *Value( PhaseTransform *phase ) const { return TypeInt::CC; }
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  const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;}
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  void create_lock_counter(JVMState* s);
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  BiasedLockingCounters* counters() const { return _counters; }
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};
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//------------------------------FastUnlockNode---------------------------------
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class FastUnlockNode: public CmpNode {
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public:
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  FastUnlockNode(Node *ctrl, Node *oop, Node *box) : CmpNode(oop,box) {
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    init_req(0,ctrl);
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    init_class_id(Class_FastUnlock);
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  }
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  Node* obj_node() const { return in(1); }
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  Node* box_node() const { return in(2); }
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  // FastLock and FastUnlockNode do not hash, we need one for each correspoding
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  // LockNode/UnLockNode to avoid creating Phi's.
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  virtual uint hash() const ;                  // { return NO_HASH; }
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  virtual uint cmp( const Node &n ) const ;    // Always fail, except on self
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  virtual int Opcode() const;
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  virtual const Type *Value( PhaseTransform *phase ) const { return TypeInt::CC; }
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  const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;}
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};