1 /*
2 * Copyright (c) 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
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
27 #include "runtime/atomic.hpp"
28 #include "services/memBaseline.hpp"
29 #include "services/memRecorder.hpp"
30 #include "services/memPtr.hpp"
31 #include "services/memTracker.hpp"
32
33 MemPointer* SequencedRecordIterator::next_record() {
34 MemPointer* itr_cur = _itr.current();
35 if (itr_cur == NULL) return NULL;
36 MemPointer* itr_next = _itr.next();
37
38 while (itr_next != NULL &&
39 same_kind((MemPointerRecord*)itr_cur, (MemPointerRecord*)itr_next)) {
40 itr_cur = itr_next;
41 itr_next = _itr.next();
42 }
43
44 return itr_cur;
45 }
46
47
48 volatile jint MemRecorder::_instance_count = 0;
49
50 MemRecorder::MemRecorder() {
51 assert(MemTracker::is_on(), "Native memory tracking is off");
52 Atomic::inc(&_instance_count);
53 debug_only(set_generation();)
54
55 if (MemTracker::track_callsite()) {
56 _pointer_records = new (std::nothrow)FixedSizeMemPointerArray<SeqMemPointerRecordEx,
57 DEFAULT_RECORDER_PTR_ARRAY_SIZE>();
58 } else {
59 _pointer_records = new (std::nothrow)FixedSizeMemPointerArray<SeqMemPointerRecord,
60 DEFAULT_RECORDER_PTR_ARRAY_SIZE>();
61 }
62 _next = NULL;
63
64
65 if (_pointer_records != NULL) {
66 // recode itself
67 record((address)this, (MemPointerRecord::malloc_tag()|mtNMT|otNMTRecorder),
68 sizeof(MemRecorder), CALLER_PC);
69 record((address)_pointer_records, (MemPointerRecord::malloc_tag()|mtNMT|otNMTRecorder),
70 _pointer_records->instance_size(),CURRENT_PC);
71 }
72 }
73
74 MemRecorder::~MemRecorder() {
75 if (_pointer_records != NULL) {
76 if (MemTracker::is_on()) {
77 MemTracker::record_free((address)_pointer_records, mtNMT);
78 MemTracker::record_free((address)this, mtNMT);
79 }
80 delete _pointer_records;
81 }
82 if (_next != NULL) {
83 delete _next;
84 }
85
86 Atomic::dec(&_instance_count);
87 }
88
89 // Sorting order:
90 // 1. memory block address
91 // 2. mem pointer record tags
92 // 3. sequence number
93 int MemRecorder::sort_record_fn(const void* e1, const void* e2) {
94 const MemPointerRecord* p1 = (const MemPointerRecord*)e1;
95 const MemPointerRecord* p2 = (const MemPointerRecord*)e2;
96 int delta = UNSIGNED_COMPARE(p1->addr(), p2->addr());
97 if (delta == 0) {
98 int df = UNSIGNED_COMPARE((p1->flags() & MemPointerRecord::tag_masks),
99 (p2->flags() & MemPointerRecord::tag_masks));
100 if (df == 0) {
101 assert(p1->seq() != p2->seq(), "dup seq");
102 return p1->seq() - p2->seq();
103 } else {
104 return df;
105 }
106 } else {
107 return delta;
108 }
109 }
110
111 bool MemRecorder::record(address p, MEMFLAGS flags, size_t size, address pc) {
112 #ifdef ASSERT
113 if (MemPointerRecord::is_virtual_memory_record(flags)) {
114 assert((flags & MemPointerRecord::tag_masks) != 0, "bad virtual memory record");
115 } else {
116 assert((flags & MemPointerRecord::tag_masks) == MemPointerRecord::malloc_tag() ||
117 (flags & MemPointerRecord::tag_masks) == MemPointerRecord::free_tag() ||
118 IS_ARENA_OBJ(flags),
119 "bad malloc record");
120 }
121 // a recorder should only hold records within the same generation
122 unsigned long cur_generation = SequenceGenerator::current_generation();
123 assert(cur_generation == _generation,
124 "this thread did not enter sync point");
125 #endif
126
127 if (MemTracker::track_callsite()) {
128 SeqMemPointerRecordEx ap(p, flags, size, pc);
129 debug_only(check_dup_seq(ap.seq());)
130 return _pointer_records->append(&ap);
131 } else {
132 SeqMemPointerRecord ap(p, flags, size);
133 debug_only(check_dup_seq(ap.seq());)
134 return _pointer_records->append(&ap);
135 }
136 }
137
138 // iterator for alloc pointers
139 SequencedRecordIterator MemRecorder::pointer_itr() {
140 assert(_pointer_records != NULL, "just check");
141 _pointer_records->sort((FN_SORT)sort_record_fn);
142 return SequencedRecordIterator(_pointer_records);
143 }
144
145
146 #ifdef ASSERT
147 void MemRecorder::set_generation() {
148 _generation = SequenceGenerator::current_generation();
149 }
150
151 void MemRecorder::check_dup_seq(jint seq) const {
152 MemPointerArrayIteratorImpl itr(_pointer_records);
153 MemPointerRecord* rc = (MemPointerRecord*)itr.current();
154 while (rc != NULL) {
155 assert(rc->seq() != seq, "dup seq");
156 rc = (MemPointerRecord*)itr.next();
157 }
158 }
159
160 #endif