Thu, 03 Apr 2014 17:49:31 +0400
8016302: Change type of the number of GC workers to unsigned int (2)
Reviewed-by: tschatzl, jwilhelm
1 /*
2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
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
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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.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_INLINE_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_INLINE_HPP
28 #include "gc_implementation/g1/concurrentMark.inline.hpp"
29 #include "gc_implementation/g1/g1CollectedHeap.hpp"
30 #include "gc_implementation/g1/g1OopClosures.hpp"
31 #include "gc_implementation/g1/g1RemSet.hpp"
32 #include "gc_implementation/g1/g1RemSet.inline.hpp"
33 #include "gc_implementation/g1/heapRegionRemSet.hpp"
35 /*
36 * This really ought to be an inline function, but apparently the C++
37 * compiler sometimes sees fit to ignore inline declarations. Sigh.
38 */
40 template <class T>
41 inline void FilterIntoCSClosure::do_oop_nv(T* p) {
42 T heap_oop = oopDesc::load_heap_oop(p);
43 if (!oopDesc::is_null(heap_oop) &&
44 _g1->obj_in_cs(oopDesc::decode_heap_oop_not_null(heap_oop))) {
45 _oc->do_oop(p);
46 }
47 }
49 template <class T>
50 inline void FilterOutOfRegionClosure::do_oop_nv(T* p) {
51 T heap_oop = oopDesc::load_heap_oop(p);
52 if (!oopDesc::is_null(heap_oop)) {
53 HeapWord* obj_hw = (HeapWord*)oopDesc::decode_heap_oop_not_null(heap_oop);
54 if (obj_hw < _r_bottom || obj_hw >= _r_end) {
55 _oc->do_oop(p);
56 }
57 }
58 }
60 // This closure is applied to the fields of the objects that have just been copied.
61 template <class T>
62 inline void G1ParScanClosure::do_oop_nv(T* p) {
63 T heap_oop = oopDesc::load_heap_oop(p);
65 if (!oopDesc::is_null(heap_oop)) {
66 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
67 if (_g1->in_cset_fast_test(obj)) {
68 // We're not going to even bother checking whether the object is
69 // already forwarded or not, as this usually causes an immediate
70 // stall. We'll try to prefetch the object (for write, given that
71 // we might need to install the forwarding reference) and we'll
72 // get back to it when pop it from the queue
73 Prefetch::write(obj->mark_addr(), 0);
74 Prefetch::read(obj->mark_addr(), (HeapWordSize*2));
76 // slightly paranoid test; I'm trying to catch potential
77 // problems before we go into push_on_queue to know where the
78 // problem is coming from
79 assert((obj == oopDesc::load_decode_heap_oop(p)) ||
80 (obj->is_forwarded() &&
81 obj->forwardee() == oopDesc::load_decode_heap_oop(p)),
82 "p should still be pointing to obj or to its forwardee");
84 _par_scan_state->push_on_queue(p);
85 } else {
86 _par_scan_state->update_rs(_from, p, _worker_id);
87 }
88 }
89 }
91 template <class T>
92 inline void G1ParPushHeapRSClosure::do_oop_nv(T* p) {
93 T heap_oop = oopDesc::load_heap_oop(p);
95 if (!oopDesc::is_null(heap_oop)) {
96 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
97 if (_g1->in_cset_fast_test(obj)) {
98 Prefetch::write(obj->mark_addr(), 0);
99 Prefetch::read(obj->mark_addr(), (HeapWordSize*2));
101 // Place on the references queue
102 _par_scan_state->push_on_queue(p);
103 }
104 }
105 }
107 template <class T>
108 inline void G1CMOopClosure::do_oop_nv(T* p) {
109 assert(_g1h->is_in_g1_reserved((HeapWord*) p), "invariant");
110 assert(!_g1h->is_on_master_free_list(
111 _g1h->heap_region_containing((HeapWord*) p)), "invariant");
113 oop obj = oopDesc::load_decode_heap_oop(p);
114 if (_cm->verbose_high()) {
115 gclog_or_tty->print_cr("[%u] we're looking at location "
116 "*"PTR_FORMAT" = "PTR_FORMAT,
117 _task->worker_id(), p, (void*) obj);
118 }
119 _task->deal_with_reference(obj);
120 }
122 template <class T>
123 inline void G1RootRegionScanClosure::do_oop_nv(T* p) {
124 T heap_oop = oopDesc::load_heap_oop(p);
125 if (!oopDesc::is_null(heap_oop)) {
126 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
127 HeapRegion* hr = _g1h->heap_region_containing((HeapWord*) obj);
128 if (hr != NULL) {
129 _cm->grayRoot(obj, obj->size(), _worker_id, hr);
130 }
131 }
132 }
134 template <class T>
135 inline void G1Mux2Closure::do_oop_nv(T* p) {
136 // Apply first closure; then apply the second.
137 _c1->do_oop(p);
138 _c2->do_oop(p);
139 }
141 template <class T>
142 inline void G1TriggerClosure::do_oop_nv(T* p) {
143 // Record that this closure was actually applied (triggered).
144 _triggered = true;
145 }
147 template <class T>
148 inline void G1InvokeIfNotTriggeredClosure::do_oop_nv(T* p) {
149 if (!_trigger_cl->triggered()) {
150 _oop_cl->do_oop(p);
151 }
152 }
154 template <class T>
155 inline void G1UpdateRSOrPushRefOopClosure::do_oop_nv(T* p) {
156 oop obj = oopDesc::load_decode_heap_oop(p);
157 #ifdef ASSERT
158 // can't do because of races
159 // assert(obj == NULL || obj->is_oop(), "expected an oop");
161 // Do the safe subset of is_oop
162 if (obj != NULL) {
163 #ifdef CHECK_UNHANDLED_OOPS
164 oopDesc* o = obj.obj();
165 #else
166 oopDesc* o = obj;
167 #endif // CHECK_UNHANDLED_OOPS
168 assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned");
169 assert(Universe::heap()->is_in_reserved(obj), "must be in heap");
170 }
171 #endif // ASSERT
173 assert(_from != NULL, "from region must be non-NULL");
174 assert(_from->is_in_reserved(p), "p is not in from");
176 HeapRegion* to = _g1->heap_region_containing(obj);
177 if (to != NULL && _from != to) {
178 // The _record_refs_into_cset flag is true during the RSet
179 // updating part of an evacuation pause. It is false at all
180 // other times:
181 // * rebuilding the rembered sets after a full GC
182 // * during concurrent refinement.
183 // * updating the remembered sets of regions in the collection
184 // set in the event of an evacuation failure (when deferred
185 // updates are enabled).
187 if (_record_refs_into_cset && to->in_collection_set()) {
188 // We are recording references that point into the collection
189 // set and this particular reference does exactly that...
190 // If the referenced object has already been forwarded
191 // to itself, we are handling an evacuation failure and
192 // we have already visited/tried to copy this object
193 // there is no need to retry.
194 if (!self_forwarded(obj)) {
195 assert(_push_ref_cl != NULL, "should not be null");
196 // Push the reference in the refs queue of the G1ParScanThreadState
197 // instance for this worker thread.
198 _push_ref_cl->do_oop(p);
199 }
201 // Deferred updates to the CSet are either discarded (in the normal case),
202 // or processed (if an evacuation failure occurs) at the end
203 // of the collection.
204 // See G1RemSet::cleanup_after_oops_into_collection_set_do().
205 return;
206 }
208 // We either don't care about pushing references that point into the
209 // collection set (i.e. we're not during an evacuation pause) _or_
210 // the reference doesn't point into the collection set. Either way
211 // we add the reference directly to the RSet of the region containing
212 // the referenced object.
213 assert(to->rem_set() != NULL, "Need per-region 'into' remsets.");
214 to->rem_set()->add_reference(p, _worker_i);
215 }
216 }
218 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1OOPCLOSURES_INLINE_HPP