Mercurial > hg > graal-compiler
annotate src/share/vm/opto/locknode.cpp @ 3992:d1bdeef3e3e2
7098282: G1: assert(interval >= 0) failed: Sanity check, referencePolicy.cpp: 76
Summary: There is a race between one thread successfully forwarding and copying the klass mirror for the SoftReference class (including the static master clock) and another thread attempting to use the master clock while attempting to discover a soft reference object. Maintain a shadow copy of the soft reference master clock and use the shadow during reference discovery and reference processing.
Reviewed-by: tonyp, brutisso, ysr
author | johnc |
---|---|
date | Wed, 12 Oct 2011 10:25:51 -0700 |
parents | f95d63e2154a |
children | e9a5e0a812c8 |
rev | line source |
---|---|
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
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
605
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
605
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
605
diff
changeset
|
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 | |
66
6dbf1a175d6b
6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents:
0
diff
changeset
|
42 BoxLockNode::BoxLockNode( int slot ) : Node( Compile::current()->root() ), |
6dbf1a175d6b
6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents:
0
diff
changeset
|
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 | |
460
424f9bfe6b96
6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents:
196
diff
changeset
|
50 //-----------------------------hash-------------------------------------------- |
424f9bfe6b96
6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents:
196
diff
changeset
|
51 uint BoxLockNode::hash() const { |
424f9bfe6b96
6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents:
196
diff
changeset
|
52 return Node::hash() + _slot + (_is_eliminated ? Compile::current()->fixed_slots() : 0); |
424f9bfe6b96
6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents:
196
diff
changeset
|
53 } |
424f9bfe6b96
6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents:
196
diff
changeset
|
54 |
0 | 55 //------------------------------cmp-------------------------------------------- |
56 uint BoxLockNode::cmp( const Node &n ) const { | |
57 const BoxLockNode &bn = (const BoxLockNode &)n; | |
460
424f9bfe6b96
6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents:
196
diff
changeset
|
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 } |