duke@435: /*
trims@1907:  * Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: #include "incls/_precompiled.incl"
duke@435: #include "incls/_locknode.cpp.incl"
duke@435: 
duke@435: //=============================================================================
duke@435: const RegMask &BoxLockNode::in_RegMask(uint i) const {
duke@435:   return _inmask;
duke@435: }
duke@435: 
duke@435: const RegMask &BoxLockNode::out_RegMask() const {
duke@435:   return *Matcher::idealreg2regmask[Op_RegP];
duke@435: }
duke@435: 
duke@435: uint BoxLockNode::size_of() const { return sizeof(*this); }
duke@435: 
kvn@501: BoxLockNode::BoxLockNode( int slot ) : Node( Compile::current()->root() ),
kvn@501:                                        _slot(slot), _is_eliminated(false) {
duke@435:   init_class_id(Class_BoxLock);
duke@435:   init_flags(Flag_rematerialize);
duke@435:   OptoReg::Name reg = OptoReg::stack2reg(_slot);
duke@435:   _inmask.Insert(reg);
duke@435: }
duke@435: 
kvn@895: //-----------------------------hash--------------------------------------------
kvn@895: uint BoxLockNode::hash() const {
kvn@895:   return Node::hash() + _slot + (_is_eliminated ? Compile::current()->fixed_slots() : 0);
kvn@895: }
kvn@895: 
duke@435: //------------------------------cmp--------------------------------------------
duke@435: uint BoxLockNode::cmp( const Node &n ) const {
duke@435:   const BoxLockNode &bn = (const BoxLockNode &)n;
kvn@895:   return bn._slot == _slot && bn._is_eliminated == _is_eliminated;
duke@435: }
duke@435: 
duke@435: OptoReg::Name BoxLockNode::stack_slot(Node* box_node) {
duke@435:   // Chase down the BoxNode
duke@435:   while (!box_node->is_BoxLock()) {
duke@435:     //    if (box_node->is_SpillCopy()) {
duke@435:     //      Node *m = box_node->in(1);
duke@435:     //      if (m->is_Mach() && m->as_Mach()->ideal_Opcode() == Op_StoreP) {
duke@435:     //        box_node = m->in(m->as_Mach()->operand_index(2));
duke@435:     //        continue;
duke@435:     //      }
duke@435:     //    }
duke@435:     assert(box_node->is_SpillCopy() || box_node->is_Phi(), "Bad spill of Lock.");
duke@435:     box_node = box_node->in(1);
duke@435:   }
duke@435:   return box_node->in_RegMask(0).find_first_elem();
duke@435: }
duke@435: 
duke@435: //=============================================================================
duke@435: //-----------------------------hash--------------------------------------------
duke@435: uint FastLockNode::hash() const { return NO_HASH; }
duke@435: 
duke@435: //------------------------------cmp--------------------------------------------
duke@435: uint FastLockNode::cmp( const Node &n ) const {
duke@435:   return (&n == this);                // Always fail except on self
duke@435: }
duke@435: 
duke@435: //=============================================================================
duke@435: //-----------------------------hash--------------------------------------------
duke@435: uint FastUnlockNode::hash() const { return NO_HASH; }
duke@435: 
duke@435: //------------------------------cmp--------------------------------------------
duke@435: uint FastUnlockNode::cmp( const Node &n ) const {
duke@435:   return (&n == this);                // Always fail except on self
duke@435: }
duke@435: 
duke@435: //
duke@435: // Create a counter which counts the number of times this lock is acquired
duke@435: //
duke@435: void FastLockNode::create_lock_counter(JVMState* state) {
duke@435:   BiasedLockingNamedCounter* blnc = (BiasedLockingNamedCounter*)
duke@435:            OptoRuntime::new_named_counter(state, NamedCounter::BiasedLockingCounter);
duke@435:   _counters = blnc->counters();
duke@435: }
duke@435: 
duke@435: //=============================================================================
duke@435: //------------------------------do_monitor_enter-------------------------------
duke@435: void Parse::do_monitor_enter() {
duke@435:   kill_dead_locals();
duke@435: 
duke@435:   // Null check; get casted pointer.
duke@435:   Node *obj = do_null_check(peek(), T_OBJECT);
duke@435:   // Check for locking null object
duke@435:   if (stopped()) return;
duke@435: 
duke@435:   // the monitor object is not part of debug info expression stack
duke@435:   pop();
duke@435: 
duke@435:   // Insert a FastLockNode which takes as arguments the current thread pointer,
duke@435:   // the obj pointer & the address of the stack slot pair used for the lock.
duke@435:   shared_lock(obj);
duke@435: }
duke@435: 
duke@435: //------------------------------do_monitor_exit--------------------------------
duke@435: void Parse::do_monitor_exit() {
duke@435:   kill_dead_locals();
duke@435: 
duke@435:   pop();                        // Pop oop to unlock
twisti@1040:   // Because monitors are guaranteed paired (else we bail out), we know
duke@435:   // the matching Lock for this Unlock.  Hence we know there is no need
duke@435:   // for a null check on Unlock.
duke@435:   shared_unlock(map()->peek_monitor_box(), map()->peek_monitor_obj());
duke@435: }