1 /*

     2  * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    24 

    25 #ifndef SHARE_VM_OPTO_LOCKNODE_HPP

    26 #define SHARE_VM_OPTO_LOCKNODE_HPP

    27 

    28 #include "opto/node.hpp"

    29 #include "opto/opcodes.hpp"

    30 #include "opto/subnode.hpp"

    31 

    32 class BiasedLockingCounters;

    33 class RTMLockingCounters;

    34 

    35 //------------------------------BoxLockNode------------------------------------

    36 class BoxLockNode : public Node {

    37   const int     _slot; // stack slot

    38   RegMask     _inmask; // OptoReg corresponding to stack slot

    39   bool _is_eliminated; // Associated locks were safely eliminated

    40 

    41 public:

    42   BoxLockNode( int lock );

    43   virtual int Opcode() const;

    44   virtual void emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const;

    45   virtual uint size(PhaseRegAlloc *ra_) const;

    46   virtual const RegMask &in_RegMask(uint) const;

    47   virtual const RegMask &out_RegMask() const;

    48   virtual uint size_of() const;

    49   virtual uint hash() const;

    50   virtual uint cmp( const Node &n ) const;

    51   virtual const class Type *bottom_type() const { return TypeRawPtr::BOTTOM; }

    52   virtual uint ideal_reg() const { return Op_RegP; }

    53 

    54   static OptoReg::Name reg(Node* box_node);

    55   static BoxLockNode* box_node(Node* box_node);

    56   static bool same_slot(Node* box1, Node* box2) {

    57     return box1->as_BoxLock()->_slot == box2->as_BoxLock()->_slot;

    58   }

    59   int stack_slot() const { return _slot; }

    60 

    61   bool is_eliminated() const { return _is_eliminated; }

    62   // mark lock as eliminated.

    63   void set_eliminated()      { _is_eliminated = true; }

    64 

    65   // Is BoxLock node used for one simple lock region?

    66   bool is_simple_lock_region(LockNode** unique_lock, Node* obj);

    67 

    68 #ifndef PRODUCT

    69   virtual void format( PhaseRegAlloc *, outputStream *st ) const;

    70   virtual void dump_spec(outputStream *st) const { st->print("  Lock %d",_slot); }

    71 #endif

    72 };

    73 

    74 //------------------------------FastLockNode-----------------------------------

    75 class FastLockNode: public CmpNode {

    76 private:

    77   BiasedLockingCounters*        _counters;

    78   RTMLockingCounters*       _rtm_counters; // RTM lock counters for inflated locks

    79   RTMLockingCounters* _stack_rtm_counters; // RTM lock counters for stack locks

    80 

    81 public:

    82   FastLockNode(Node *ctrl, Node *oop, Node *box) : CmpNode(oop,box) {

    83     init_req(0,ctrl);

    84     init_class_id(Class_FastLock);

    85     _counters = NULL;

    86     _rtm_counters = NULL;

    87     _stack_rtm_counters = NULL;

    88   }

    89   Node* obj_node() const { return in(1); }

    90   Node* box_node() const { return in(2); }

    91   void  set_box_node(Node* box) { set_req(2, box); }

    92 

    93   // FastLock and FastUnlockNode do not hash, we need one for each correspoding

    94   // LockNode/UnLockNode to avoid creating Phi's.

    95   virtual uint hash() const ;                  // { return NO_HASH; }

    96   virtual uint size_of() const;

    97   virtual uint cmp( const Node &n ) const ;    // Always fail, except on self

    98   virtual int Opcode() const;

    99   virtual const Type* Value(PhaseGVN* phase) const { return TypeInt::CC; }

   100   const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;}

   101 

   102   void create_lock_counter(JVMState* s);

   103   void create_rtm_lock_counter(JVMState* state);

   104   BiasedLockingCounters*        counters() const { return _counters; }

   105   RTMLockingCounters*       rtm_counters() const { return _rtm_counters; }

   106   RTMLockingCounters* stack_rtm_counters() const { return _stack_rtm_counters; }

   107 };

   108 

   109 

   110 //------------------------------FastUnlockNode---------------------------------

   111 class FastUnlockNode: public CmpNode {

   112 public:

   113   FastUnlockNode(Node *ctrl, Node *oop, Node *box) : CmpNode(oop,box) {

   114     init_req(0,ctrl);

   115     init_class_id(Class_FastUnlock);

   116   }

   117   Node* obj_node() const { return in(1); }

   118   Node* box_node() const { return in(2); }

   119 

   120 

   121   // FastLock and FastUnlockNode do not hash, we need one for each correspoding

   122   // LockNode/UnLockNode to avoid creating Phi's.

   123   virtual uint hash() const ;                  // { return NO_HASH; }

   124   virtual uint cmp( const Node &n ) const ;    // Always fail, except on self

   125   virtual int Opcode() const;

   126   virtual const Type* Value(PhaseGVN* phase) const { return TypeInt::CC; }

   127   const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;}

   128 

   129 };

   130 

   131 #endif // SHARE_VM_OPTO_LOCKNODE_HPP