Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/monitorChunk.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 | d2a62e0f25eb |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1997, 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:
0
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
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:
0
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_RUNTIME_MONITORCHUNK_HPP |
| 26 #define SHARE_VM_RUNTIME_MONITORCHUNK_HPP | |
| 27 | |
| 28 #include "runtime/synchronizer.hpp" | |
| 29 | |
| 0 | 30 // Data structure for holding monitors for one activation during |
| 31 // deoptimization. | |
| 32 | |
| 33 class MonitorChunk: public CHeapObj { | |
| 34 private: | |
| 35 int _number_of_monitors; | |
| 36 BasicObjectLock* _monitors; | |
| 37 BasicObjectLock* monitors() const { return _monitors; } | |
| 38 MonitorChunk* _next; | |
| 39 public: | |
| 40 // Constructor | |
| 41 MonitorChunk(int number_on_monitors); | |
| 42 ~MonitorChunk(); | |
| 43 | |
| 44 // link operations | |
| 45 MonitorChunk* next() const { return _next; } | |
| 46 void set_next(MonitorChunk* next) { _next = next; } | |
| 47 | |
| 48 // Tells whether the monitor chunk is linked into the JavaThread | |
| 49 bool is_linked() const { return next() != NULL; } | |
| 50 | |
| 51 // Returns the number of monitors | |
| 52 int number_of_monitors() const { return _number_of_monitors; } | |
| 53 | |
| 54 // Returns the index'th monitor | |
| 55 BasicObjectLock* at(int index) { assert(index >= 0 && index < number_of_monitors(), "out of bounds check"); return &monitors()[index]; } | |
| 56 | |
| 57 | |
| 58 // Memory management | |
| 59 void oops_do(OopClosure* f); | |
| 60 | |
| 61 // Tells whether the addr point into the monitors. | |
| 62 bool contains(void* addr) const { return (addr >= (void*) monitors()) && (addr < (void*) (monitors() + number_of_monitors())); } | |
| 63 }; | |
| 1972 | 64 |
| 65 #endif // SHARE_VM_RUNTIME_MONITORCHUNK_HPP |