Mercurial > hg > truffle
annotate src/share/vm/opto/locknode.cpp @ 4530:6c6cb7be1324
bugfix
author | Christian Haeubl <christian.haeubl@oracle.com> |
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date | Wed, 08 Feb 2012 21:13:35 -0800 |
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 * | |
1552
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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 } |