Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/objectMonitor.inline.hpp @ 3979:4dfb2df418f2
6484982: G1: process references during evacuation pauses
Summary: G1 now uses two reference processors - one is used by concurrent marking and the other is used by STW GCs (both full and incremental evacuation pauses). In an evacuation pause, the reference processor is embedded into the closures used to scan objects. Doing so causes causes reference objects to be 'discovered' by the reference processor. At the end of the evacuation pause, these discovered reference objects are processed - preserving (and copying) referent objects (and their reachable graphs) as appropriate.
Reviewed-by: ysr, jwilhelm, brutisso, stefank, tonyp
| author | johnc |
|---|---|
| date | Thu, 22 Sep 2011 10:57:37 -0700 |
| parents | f95d63e2154a |
| children | 22ba8c8ce6a6 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1998, 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 #ifndef SHARE_VM_RUNTIME_OBJECTMONITOR_INLINE_HPP |
| 26 #define SHARE_VM_RUNTIME_OBJECTMONITOR_INLINE_HPP | |
| 27 | |
| 0 | 28 inline intptr_t ObjectMonitor::is_entered(TRAPS) const { |
| 29 if (THREAD == _owner || THREAD->is_lock_owned((address) _owner)) { | |
| 30 return 1; | |
| 31 } | |
| 32 return 0; | |
| 33 } | |
| 34 | |
| 35 inline markOop ObjectMonitor::header() const { | |
| 36 return _header; | |
| 37 } | |
| 38 | |
| 39 inline void ObjectMonitor::set_header(markOop hdr) { | |
| 40 _header = hdr; | |
| 41 } | |
| 42 | |
| 43 inline intptr_t ObjectMonitor::count() const { | |
| 44 return _count; | |
| 45 } | |
| 46 | |
| 47 inline void ObjectMonitor::set_count(intptr_t count) { | |
| 48 _count= count; | |
| 49 } | |
| 50 | |
| 51 inline intptr_t ObjectMonitor::waiters() const { | |
| 52 return _waiters; | |
| 53 } | |
| 54 | |
| 55 inline void* ObjectMonitor::owner() const { | |
| 56 return _owner; | |
| 57 } | |
| 58 | |
| 59 inline void ObjectMonitor::clear() { | |
| 60 assert(_header, "Fatal logic error in ObjectMonitor header!"); | |
| 61 assert(_count == 0, "Fatal logic error in ObjectMonitor count!"); | |
| 62 assert(_waiters == 0, "Fatal logic error in ObjectMonitor waiters!"); | |
| 63 assert(_recursions == 0, "Fatal logic error in ObjectMonitor recursions!"); | |
| 64 assert(_object, "Fatal logic error in ObjectMonitor object!"); | |
| 65 assert(_owner == 0, "Fatal logic error in ObjectMonitor owner!"); | |
| 66 | |
| 67 _header = NULL; | |
| 68 _object = NULL; | |
| 69 } | |
| 70 | |
| 71 | |
| 72 inline void* ObjectMonitor::object() const { | |
| 73 return _object; | |
| 74 } | |
| 75 | |
| 76 inline void* ObjectMonitor::object_addr() { | |
| 77 return (void *)(&_object); | |
| 78 } | |
| 79 | |
| 80 inline void ObjectMonitor::set_object(void* obj) { | |
| 81 _object = obj; | |
| 82 } | |
| 83 | |
| 84 inline bool ObjectMonitor::check(TRAPS) { | |
| 85 if (THREAD != _owner) { | |
| 86 if (THREAD->is_lock_owned((address) _owner)) { | |
| 87 _owner = THREAD; // regain ownership of inflated monitor | |
| 88 OwnerIsThread = 1 ; | |
| 89 assert (_recursions == 0, "invariant") ; | |
| 90 } else { | |
| 91 check_slow(THREAD); | |
| 92 return false; | |
| 93 } | |
| 94 } | |
| 95 return true; | |
| 96 } | |
| 97 | |
| 98 | |
| 99 // return number of threads contending for this monitor | |
| 100 inline intptr_t ObjectMonitor::contentions() const { | |
| 101 return _count; | |
| 102 } | |
| 103 | |
| 104 inline void ObjectMonitor::set_owner(void* owner) { | |
| 105 _owner = owner; | |
| 106 _recursions = 0; | |
| 107 _count = 0; | |
| 108 } | |
| 109 | |
| 1972 | 110 |
| 111 #endif // SHARE_VM_RUNTIME_OBJECTMONITOR_INLINE_HPP |