1 /*
2 * Copyright (c) 2017, 2018 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/oop.inline.hpp"
32
33 void G1MarkAndPushClosure::do_oop(oop* p) {
34 do_oop_nv(p);
35 }
36
37 void G1MarkAndPushClosure::do_oop(narrowOop* p) {
38 do_oop_nv(p);
39 }
40
41 bool G1MarkAndPushClosure::do_metadata() {
42 return do_metadata_nv();
43 }
44
45 void G1MarkAndPushClosure::do_klass(Klass* k) {
46 do_klass_nv(k);
47 }
48
49 void G1MarkAndPushClosure::do_cld(ClassLoaderData* cld) {
50 do_cld_nv(cld);
51 }
52
53 G1AdjustAndRebuildClosure::G1AdjustAndRebuildClosure(uint worker_id) :
54 _worker_id(worker_id),
55 _compaction_delta(0),
56 _g1h(G1CollectedHeap::heap()) { }
57
58 void G1AdjustAndRebuildClosure::update_compaction_delta(oop obj) {
59 if (G1ArchiveAllocator::is_open_archive_object(obj)) {
60 _compaction_delta = 0;
61 return;
62 }
63 oop forwardee = obj->forwardee();
64 if (forwardee == NULL) {
65 // Object not moved.
66 _compaction_delta = 0;
67 } else {
68 // Object moved to forwardee, calculate delta.
69 _compaction_delta = calculate_compaction_delta(obj, forwardee);
70 }
71 }
72
73 void G1AdjustClosure::do_oop(oop* p) { adjust_pointer(p); }
74 void G1AdjustClosure::do_oop(narrowOop* p) { adjust_pointer(p); }
75
76 void G1AdjustAndRebuildClosure::do_oop(oop* p) { do_oop_nv(p); }
77 void G1AdjustAndRebuildClosure::do_oop(narrowOop* p) { do_oop_nv(p); }
78
79 void G1FollowStackClosure::do_void() { _marker->drain_stack(); }
80
81 void G1FullKeepAliveClosure::do_oop(oop* p) { do_oop_work(p); }
82 void G1FullKeepAliveClosure::do_oop(narrowOop* p) { do_oop_work(p); }
83
84 G1VerifyOopClosure::G1VerifyOopClosure(VerifyOption option) :
85 _g1h(G1CollectedHeap::heap()),
86 _containing_obj(NULL),
87 _verify_option(option),
88 _cc(0),
89 _failures(false) {
90 }
91
92 void G1VerifyOopClosure::print_object(outputStream* out, oop obj) {
93 #ifdef PRODUCT
94 Klass* k = obj->klass();
95 const char* class_name = InstanceKlass::cast(k)->external_name();
96 out->print_cr("class name %s", class_name);
97 #else // PRODUCT
98 obj->print_on(out);
99 #endif // PRODUCT
100 }
101
102 template <class T> void G1VerifyOopClosure::do_oop_nv(T* p) {
103 T heap_oop = oopDesc::load_heap_oop(p);
104 if (!oopDesc::is_null(heap_oop)) {
105 _cc++;
106 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
107 bool failed = false;
108 if (!_g1h->is_in_closed_subset(obj) || _g1h->is_obj_dead_cond(obj, _verify_option)) {
109 MutexLockerEx x(ParGCRareEvent_lock,
110 Mutex::_no_safepoint_check_flag);
111 LogStreamHandle(Error, gc, verify) yy;
112 if (!_failures) {
113 yy.cr();
114 yy.print_cr("----------");
115 }
116 if (!_g1h->is_in_closed_subset(obj)) {
117 HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p);
118 yy.print_cr("Field " PTR_FORMAT
119 " of live obj " PTR_FORMAT " in region "
120 "[" PTR_FORMAT ", " PTR_FORMAT ")",
121 p2i(p), p2i(_containing_obj),
122 p2i(from->bottom()), p2i(from->end()));
123 print_object(&yy, _containing_obj);
124 yy.print_cr("points to obj " PTR_FORMAT " not in the heap",
125 p2i(obj));
126 } else {
127 HeapRegion* from = _g1h->heap_region_containing((HeapWord*)p);
128 HeapRegion* to = _g1h->heap_region_containing((HeapWord*)obj);
129 yy.print_cr("Field " PTR_FORMAT
130 " of live obj " PTR_FORMAT " in region "
131 "[" PTR_FORMAT ", " PTR_FORMAT ")",
132 p2i(p), p2i(_containing_obj),
133 p2i(from->bottom()), p2i(from->end()));
134 print_object(&yy, _containing_obj);
135 yy.print_cr("points to dead obj " PTR_FORMAT " in region "
136 "[" PTR_FORMAT ", " PTR_FORMAT ")",
137 p2i(obj), p2i(to->bottom()), p2i(to->end()));
138 print_object(&yy, obj);
139 }
140 yy.print_cr("----------");
141 yy.flush();
142 _failures = true;
143 failed = true;
144 }
145 }
146 }
147
148 template void G1VerifyOopClosure::do_oop_nv(oop*);
149 template void G1VerifyOopClosure::do_oop_nv(narrowOop*);
150
151 // Generate G1 full GC specialized oop_oop_iterate functions.
152 SPECIALIZED_OOP_OOP_ITERATE_CLOSURES_G1FULL(ALL_KLASS_OOP_OOP_ITERATE_DEFN)