Mercurial > hg > truffle
annotate src/share/vm/opto/locknode.cpp @ 2426:1d1603768966
7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
Summary: Update the copyright to be 2010 on all changed files in OpenJDK
Reviewed-by: ohair
| author | trims |
|---|---|
| date | Tue, 05 Apr 2011 14:12:31 -0700 |
| parents | f95d63e2154a |
| children | e9a5e0a812c8 |
| rev | line source |
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| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "opto/locknode.hpp" | |
| 27 #include "opto/parse.hpp" | |
| 28 #include "opto/rootnode.hpp" | |
| 29 #include "opto/runtime.hpp" | |
| 0 | 30 |
| 31 //============================================================================= | |
| 32 const RegMask &BoxLockNode::in_RegMask(uint i) const { | |
| 33 return _inmask; | |
| 34 } | |
| 35 | |
| 36 const RegMask &BoxLockNode::out_RegMask() const { | |
| 37 return *Matcher::idealreg2regmask[Op_RegP]; | |
| 38 } | |
| 39 | |
| 40 uint BoxLockNode::size_of() const { return sizeof(*this); } | |
| 41 | |
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42 BoxLockNode::BoxLockNode( int slot ) : Node( Compile::current()->root() ), |
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43 _slot(slot), _is_eliminated(false) { |
| 0 | 44 init_class_id(Class_BoxLock); |
| 45 init_flags(Flag_rematerialize); | |
| 46 OptoReg::Name reg = OptoReg::stack2reg(_slot); | |
| 47 _inmask.Insert(reg); | |
| 48 } | |
| 49 | |
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50 //-----------------------------hash-------------------------------------------- |
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51 uint BoxLockNode::hash() const { |
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52 return Node::hash() + _slot + (_is_eliminated ? Compile::current()->fixed_slots() : 0); |
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53 } |
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54 |
| 0 | 55 //------------------------------cmp-------------------------------------------- |
| 56 uint BoxLockNode::cmp( const Node &n ) const { | |
| 57 const BoxLockNode &bn = (const BoxLockNode &)n; | |
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58 return bn._slot == _slot && bn._is_eliminated == _is_eliminated; |
| 0 | 59 } |
| 60 | |
| 61 OptoReg::Name BoxLockNode::stack_slot(Node* box_node) { | |
| 62 // Chase down the BoxNode | |
| 63 while (!box_node->is_BoxLock()) { | |
| 64 // if (box_node->is_SpillCopy()) { | |
| 65 // Node *m = box_node->in(1); | |
| 66 // if (m->is_Mach() && m->as_Mach()->ideal_Opcode() == Op_StoreP) { | |
| 67 // box_node = m->in(m->as_Mach()->operand_index(2)); | |
| 68 // continue; | |
| 69 // } | |
| 70 // } | |
| 71 assert(box_node->is_SpillCopy() || box_node->is_Phi(), "Bad spill of Lock."); | |
| 72 box_node = box_node->in(1); | |
| 73 } | |
| 74 return box_node->in_RegMask(0).find_first_elem(); | |
| 75 } | |
| 76 | |
| 77 //============================================================================= | |
| 78 //-----------------------------hash-------------------------------------------- | |
| 79 uint FastLockNode::hash() const { return NO_HASH; } | |
| 80 | |
| 81 //------------------------------cmp-------------------------------------------- | |
| 82 uint FastLockNode::cmp( const Node &n ) const { | |
| 83 return (&n == this); // Always fail except on self | |
| 84 } | |
| 85 | |
| 86 //============================================================================= | |
| 87 //-----------------------------hash-------------------------------------------- | |
| 88 uint FastUnlockNode::hash() const { return NO_HASH; } | |
| 89 | |
| 90 //------------------------------cmp-------------------------------------------- | |
| 91 uint FastUnlockNode::cmp( const Node &n ) const { | |
| 92 return (&n == this); // Always fail except on self | |
| 93 } | |
| 94 | |
| 95 // | |
| 96 // Create a counter which counts the number of times this lock is acquired | |
| 97 // | |
| 98 void FastLockNode::create_lock_counter(JVMState* state) { | |
| 99 BiasedLockingNamedCounter* blnc = (BiasedLockingNamedCounter*) | |
| 100 OptoRuntime::new_named_counter(state, NamedCounter::BiasedLockingCounter); | |
| 101 _counters = blnc->counters(); | |
| 102 } | |
| 103 | |
| 104 //============================================================================= | |
| 105 //------------------------------do_monitor_enter------------------------------- | |
| 106 void Parse::do_monitor_enter() { | |
| 107 kill_dead_locals(); | |
| 108 | |
| 109 // Null check; get casted pointer. | |
| 110 Node *obj = do_null_check(peek(), T_OBJECT); | |
| 111 // Check for locking null object | |
| 112 if (stopped()) return; | |
| 113 | |
| 114 // the monitor object is not part of debug info expression stack | |
| 115 pop(); | |
| 116 | |
| 117 // Insert a FastLockNode which takes as arguments the current thread pointer, | |
| 118 // the obj pointer & the address of the stack slot pair used for the lock. | |
| 119 shared_lock(obj); | |
| 120 } | |
| 121 | |
| 122 //------------------------------do_monitor_exit-------------------------------- | |
| 123 void Parse::do_monitor_exit() { | |
| 124 kill_dead_locals(); | |
| 125 | |
| 126 pop(); // Pop oop to unlock | |
| 605 | 127 // Because monitors are guaranteed paired (else we bail out), we know |
| 0 | 128 // the matching Lock for this Unlock. Hence we know there is no need |
| 129 // for a null check on Unlock. | |
| 130 shared_unlock(map()->peek_monitor_box(), map()->peek_monitor_obj()); | |
| 131 } |