1 /*
2 * Copyright (c) 2017, 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
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "gc/g1/g1CollectedHeap.hpp"
27 #include "gc/g1/g1FullGCMarker.inline.hpp"
28 #include "gc/g1/g1FullGCOopClosures.inline.hpp"
29 #include "gc/g1/g1_specialized_oop_closures.hpp"
30 #include "logging/logStream.hpp"
31 #include "oops/access.inline.hpp"
32 #include "oops/compressedOops.inline.hpp"
33
34 void G1MarkAndPushClosure::do_oop(oop* p) {
35 do_oop_nv(p);
36 }
37
38 void G1MarkAndPushClosure::do_oop(narrowOop* p) {
39 do_oop_nv(p);
40 }
41
42 bool G1MarkAndPushClosure::do_metadata() {
43 return do_metadata_nv();
44 }
45
46 void G1MarkAndPushClosure::do_klass(Klass* k) {
47 do_klass_nv(k);
48 }
49
50 void G1MarkAndPushClosure::do_cld(ClassLoaderData* cld) {
51 do_cld_nv(cld);
52 }
53
54 G1AdjustAndRebuildClosure::G1AdjustAndRebuildClosure(uint worker_id) :
55 _worker_id(worker_id),
56 _compaction_delta(0),
57 _g1h(G1CollectedHeap::heap()) { }
58
59 void G1AdjustAndRebuildClosure::update_compaction_delta(oop obj) {
60 if (G1ArchiveAllocator::is_open_archive_object(obj)) {
61 _compaction_delta = 0;
62 return;
63 }
64 oop forwardee = obj->forwardee();
65 if (forwardee == NULL) {
66 // Object not moved.
67 _compaction_delta = 0;
68 } else {
69 // Object moved to forwardee, calculate delta.
70 _compaction_delta = calculate_compaction_delta(obj, forwardee);
71 }
72 }
73
74 void G1AdjustClosure::do_oop(oop* p) { adjust_pointer(p); }
75 void G1AdjustClosure::do_oop(narrowOop* p) { adjust_pointer(p); }
76
77 void G1AdjustAndRebuildClosure::do_oop(oop* p) { do_oop_nv(p); }
78 void G1AdjustAndRebuildClosure::do_oop(narrowOop* p) { do_oop_nv(p); }
79
80 void G1FollowStackClosure::do_void() { _marker->drain_stack(); }
81
82 void G1FullKeepAliveClosure::do_oop(oop* p) { do_oop_work(p); }
83 void G1FullKeepAliveClosure::do_oop(narrowOop* p) { do_oop_work(p); }
84
85 G1VerifyOopClosure::G1VerifyOopClosure(VerifyOption option) :
86 _g1h(G1CollectedHeap::heap()),
87 _containing_obj(NULL),
88 _verify_option(option),
89 _cc(0),
90 _failures(false) {
91 }
92
93 void G1VerifyOopClosure::print_object(outputStream* out, oop obj) {
94 #ifdef PRODUCT
95 Klass* k = obj->klass();
96 const char* class_name = InstanceKlass::cast(k)->external_name();
97 out->print_cr("class name %s", class_name);
98 #else // PRODUCT
99 obj->print_on(out);
100 #endif // PRODUCT
101 }
102
103 template <class T> void G1VerifyOopClosure::do_oop_nv(T* p) {
104 T heap_oop = RawAccess<>::oop_load(p);
105 if (!CompressedOops::is_null(heap_oop)) {
106 _cc++;
107 oop obj = CompressedOops::decode_not_null(heap_oop);
108 bool failed = false;
109 if (!_g1h->is_in_closed_subset(obj) || _g1h->is_obj_dead_cond(obj, _verify_option)) {
110 MutexLockerEx x(ParGCRareEvent_lock,
111 Mutex::_no_safepoint_check_flag);
112 LogStreamHandle(Error, gc, verify) yy;
113 if (!_failures) {
114 yy.cr();
115 yy.print_cr("----------");
116 }
117 if (!_g1h->is_in_closed_subset(obj)) {
118 HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p);
119 yy.print_cr("Field " PTR_FORMAT
120 " of live obj " PTR_FORMAT " in region "
121 "[" PTR_FORMAT ", " PTR_FORMAT ")",
122 p2i(p), p2i(_containing_obj),
123 p2i(from->bottom()), p2i(from->end()));
124 print_object(&yy, _containing_obj);
125 yy.print_cr("points to obj " PTR_FORMAT " not in the heap",
126 p2i(obj));
127 } else {
128 HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p);
129 HeapRegion* to = _g1h->heap_region_containing((HeapWord*)obj);
130 yy.print_cr("Field " PTR_FORMAT
131 " of live obj " PTR_FORMAT " in region "
132 "[" PTR_FORMAT ", " PTR_FORMAT ")",
133 p2i(p), p2i(_containing_obj),
134 p2i(from->bottom()), p2i(from->end()));
135 print_object(&yy, _containing_obj);
136 yy.print_cr("points to dead obj " PTR_FORMAT " in region "
137 "[" PTR_FORMAT ", " PTR_FORMAT ")",
138 p2i(obj), p2i(to->bottom()), p2i(to->end()));
139 print_object(&yy, obj);
140 }
141 yy.print_cr("----------");
142 yy.flush();
143 _failures = true;
144 failed = true;
145 }
146 }
147 }
148
149 template void G1VerifyOopClosure::do_oop_nv(oop*);
150 template void G1VerifyOopClosure::do_oop_nv(narrowOop*);
151
152 // Generate G1 full GC specialized oop_oop_iterate functions.
153 SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_G1FULL(ALL_KLASS_OOP_OOP_ITERATE_DEFN)