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6197
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1 /*
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26
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27 #include "runtime/atomic.hpp"
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28 #include "services/memBaseline.hpp"
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29 #include "services/memRecorder.hpp"
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30 #include "services/memPtr.hpp"
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31 #include "services/memTracker.hpp"
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32
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33 MemPointer* SequencedRecordIterator::next_record() {
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34 MemPointer* itr_cur = _itr.current();
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35 if (itr_cur == NULL) return NULL;
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36 MemPointer* itr_next = _itr.next();
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37
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38 while (itr_next != NULL &&
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39 same_kind((MemPointerRecord*)itr_cur, (MemPointerRecord*)itr_next)) {
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40 itr_cur = itr_next;
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41 itr_next = _itr.next();
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42 }
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43
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44 return itr_cur;
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45 }
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46
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47
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6231
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48 volatile jint MemRecorder::_instance_count = 0;
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6197
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49
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50 MemRecorder::MemRecorder() {
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51 assert(MemTracker::is_on(), "Native memory tracking is off");
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6231
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52 Atomic::inc(&_instance_count);
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53 debug_only(set_generation();)
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54
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55 if (MemTracker::track_callsite()) {
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56 _pointer_records = new (std::nothrow)FixedSizeMemPointerArray<SeqMemPointerRecordEx,
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57 DEFAULT_RECORDER_PTR_ARRAY_SIZE>();
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58 } else {
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59 _pointer_records = new (std::nothrow)FixedSizeMemPointerArray<SeqMemPointerRecord,
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60 DEFAULT_RECORDER_PTR_ARRAY_SIZE>();
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61 }
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62 _next = NULL;
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63
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64
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65 if (_pointer_records != NULL) {
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66 // recode itself
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67 record((address)this, (MemPointerRecord::malloc_tag()|mtNMT|otNMTRecorder),
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68 sizeof(MemRecorder), CALLER_PC);
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69 record((address)_pointer_records, (MemPointerRecord::malloc_tag()|mtNMT|otNMTRecorder),
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70 _pointer_records->instance_size(),CURRENT_PC);
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71 }
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72 }
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73
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74 MemRecorder::~MemRecorder() {
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75 if (_pointer_records != NULL) {
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76 if (MemTracker::is_on()) {
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77 MemTracker::record_free((address)_pointer_records, mtNMT);
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78 MemTracker::record_free((address)this, mtNMT);
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79 }
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80 delete _pointer_records;
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81 }
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82 if (_next != NULL) {
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83 delete _next;
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84 }
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85
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86 Atomic::dec(&_instance_count);
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87 }
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88
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89 // Sorting order:
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90 // 1. memory block address
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91 // 2. mem pointer record tags
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92 // 3. sequence number
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93 int MemRecorder::sort_record_fn(const void* e1, const void* e2) {
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94 const MemPointerRecord* p1 = (const MemPointerRecord*)e1;
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95 const MemPointerRecord* p2 = (const MemPointerRecord*)e2;
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96 int delta = UNSIGNED_COMPARE(p1->addr(), p2->addr());
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97 if (delta == 0) {
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98 int df = UNSIGNED_COMPARE((p1->flags() & MemPointerRecord::tag_masks),
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99 (p2->flags() & MemPointerRecord::tag_masks));
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100 if (df == 0) {
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101 assert(p1->seq() != p2->seq(), "dup seq");
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102 return p1->seq() - p2->seq();
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103 } else {
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104 return df;
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105 }
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106 } else {
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107 return delta;
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108 }
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109 }
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110
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111 bool MemRecorder::record(address p, MEMFLAGS flags, size_t size, address pc) {
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112 #ifdef ASSERT
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113 if (MemPointerRecord::is_virtual_memory_record(flags)) {
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114 assert((flags & MemPointerRecord::tag_masks) != 0, "bad virtual memory record");
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115 } else {
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116 assert((flags & MemPointerRecord::tag_masks) == MemPointerRecord::malloc_tag() ||
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117 (flags & MemPointerRecord::tag_masks) == MemPointerRecord::free_tag() ||
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118 IS_ARENA_OBJ(flags),
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119 "bad malloc record");
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120 }
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121 // a recorder should only hold records within the same generation
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122 unsigned long cur_generation = SequenceGenerator::current_generation();
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123 assert(cur_generation == _generation,
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124 "this thread did not enter sync point");
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125 #endif
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126
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127 if (MemTracker::track_callsite()) {
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128 SeqMemPointerRecordEx ap(p, flags, size, pc);
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129 debug_only(check_dup_seq(ap.seq());)
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130 return _pointer_records->append(&ap);
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131 } else {
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132 SeqMemPointerRecord ap(p, flags, size);
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133 debug_only(check_dup_seq(ap.seq());)
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134 return _pointer_records->append(&ap);
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135 }
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136 }
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137
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138 // iterator for alloc pointers
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139 SequencedRecordIterator MemRecorder::pointer_itr() {
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140 assert(_pointer_records != NULL, "just check");
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141 _pointer_records->sort((FN_SORT)sort_record_fn);
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142 return SequencedRecordIterator(_pointer_records);
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143 }
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144
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145
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146 #ifdef ASSERT
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147 void MemRecorder::set_generation() {
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148 _generation = SequenceGenerator::current_generation();
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149 }
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150
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151 void MemRecorder::check_dup_seq(jint seq) const {
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152 MemPointerArrayIteratorImpl itr(_pointer_records);
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153 MemPointerRecord* rc = (MemPointerRecord*)itr.current();
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154 while (rc != NULL) {
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155 assert(rc->seq() != seq, "dup seq");
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156 rc = (MemPointerRecord*)itr.next();
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157 }
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158 }
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159
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160 #endif
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