1 /* |
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2 * Copyright (c) 2012, 2013, 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.inline.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 MemPointerRecord* itr_cur = (MemPointerRecord*)_itr.current(); |
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35 if (itr_cur == NULL) { |
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36 return itr_cur; |
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37 } |
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38 |
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39 MemPointerRecord* itr_next = (MemPointerRecord*)_itr.next(); |
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40 |
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41 // don't collapse virtual memory records |
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42 while (itr_next != NULL && !itr_cur->is_vm_pointer() && |
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43 !itr_next->is_vm_pointer() && |
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44 same_kind(itr_cur, itr_next)) { |
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45 itr_cur = itr_next; |
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46 itr_next = (MemPointerRecord*)_itr.next(); |
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47 } |
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48 |
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49 return itr_cur; |
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50 } |
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51 |
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52 |
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53 volatile jint MemRecorder::_instance_count = 0; |
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54 |
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55 MemRecorder::MemRecorder() { |
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56 assert(MemTracker::is_on(), "Native memory tracking is off"); |
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57 Atomic::inc(&_instance_count); |
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58 set_generation(); |
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59 |
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60 if (MemTracker::track_callsite()) { |
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61 _pointer_records = new (std::nothrow)FixedSizeMemPointerArray<SeqMemPointerRecordEx, |
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62 DEFAULT_RECORDER_PTR_ARRAY_SIZE>(); |
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63 } else { |
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64 _pointer_records = new (std::nothrow)FixedSizeMemPointerArray<SeqMemPointerRecord, |
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65 DEFAULT_RECORDER_PTR_ARRAY_SIZE>(); |
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66 } |
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67 _next = NULL; |
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68 |
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69 |
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70 if (_pointer_records != NULL) { |
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71 // recode itself |
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72 address pc = CURRENT_PC; |
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73 record((address)this, (MemPointerRecord::malloc_tag()|mtNMT|otNMTRecorder), |
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74 sizeof(MemRecorder), SequenceGenerator::next(), pc); |
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75 record((address)_pointer_records, (MemPointerRecord::malloc_tag()|mtNMT|otNMTRecorder), |
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76 _pointer_records->instance_size(), SequenceGenerator::next(), pc); |
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77 } |
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78 } |
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79 |
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80 MemRecorder::~MemRecorder() { |
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81 if (_pointer_records != NULL) { |
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82 if (MemTracker::is_on()) { |
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83 MemTracker::record_free((address)_pointer_records, mtNMT); |
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84 MemTracker::record_free((address)this, mtNMT); |
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85 } |
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86 delete _pointer_records; |
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87 } |
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88 // delete all linked recorders |
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89 while (_next != NULL) { |
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90 MemRecorder* tmp = _next; |
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91 _next = _next->next(); |
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92 tmp->set_next(NULL); |
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93 delete tmp; |
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94 } |
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95 Atomic::dec(&_instance_count); |
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96 } |
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97 |
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98 // Sorting order: |
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99 // 1. memory block address |
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100 // 2. mem pointer record tags |
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101 // 3. sequence number |
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102 int MemRecorder::sort_record_fn(const void* e1, const void* e2) { |
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103 const MemPointerRecord* p1 = (const MemPointerRecord*)e1; |
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104 const MemPointerRecord* p2 = (const MemPointerRecord*)e2; |
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105 int delta = UNSIGNED_COMPARE(p1->addr(), p2->addr()); |
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106 if (delta == 0) { |
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107 int df = UNSIGNED_COMPARE((p1->flags() & MemPointerRecord::tag_masks), |
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108 (p2->flags() & MemPointerRecord::tag_masks)); |
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109 if (df == 0) { |
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110 assert(p1->seq() != p2->seq(), "dup seq"); |
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111 return p1->seq() - p2->seq(); |
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112 } else { |
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113 return df; |
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114 } |
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115 } else { |
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116 return delta; |
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117 } |
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118 } |
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119 |
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120 bool MemRecorder::record(address p, MEMFLAGS flags, size_t size, jint seq, address pc) { |
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121 assert(seq > 0, "No sequence number"); |
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122 #ifdef ASSERT |
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123 if (MemPointerRecord::is_virtual_memory_record(flags)) { |
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124 assert((flags & MemPointerRecord::tag_masks) != 0, "bad virtual memory record"); |
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125 } else { |
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126 assert((flags & MemPointerRecord::tag_masks) == MemPointerRecord::malloc_tag() || |
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127 (flags & MemPointerRecord::tag_masks) == MemPointerRecord::free_tag() || |
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128 IS_ARENA_OBJ(flags), |
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129 "bad malloc record"); |
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130 } |
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131 // a recorder should only hold records within the same generation |
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132 unsigned long cur_generation = SequenceGenerator::current_generation(); |
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133 assert(cur_generation == _generation, |
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134 "this thread did not enter sync point"); |
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135 #endif |
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136 |
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137 if (MemTracker::track_callsite()) { |
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138 SeqMemPointerRecordEx ap(p, flags, size, seq, pc); |
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139 debug_only(check_dup_seq(ap.seq());) |
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140 return _pointer_records->append(&ap); |
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141 } else { |
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142 SeqMemPointerRecord ap(p, flags, size, seq); |
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143 debug_only(check_dup_seq(ap.seq());) |
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144 return _pointer_records->append(&ap); |
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145 } |
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146 } |
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147 |
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148 // iterator for alloc pointers |
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149 SequencedRecordIterator MemRecorder::pointer_itr() { |
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150 assert(_pointer_records != NULL, "just check"); |
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151 _pointer_records->sort((FN_SORT)sort_record_fn); |
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152 return SequencedRecordIterator(_pointer_records); |
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153 } |
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154 |
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155 |
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156 void MemRecorder::set_generation() { |
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157 _generation = SequenceGenerator::current_generation(); |
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158 } |
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159 |
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160 #ifdef ASSERT |
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161 |
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162 void MemRecorder::check_dup_seq(jint seq) const { |
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163 MemPointerArrayIteratorImpl itr(_pointer_records); |
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164 MemPointerRecord* rc = (MemPointerRecord*)itr.current(); |
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165 while (rc != NULL) { |
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166 assert(rc->seq() != seq, "dup seq"); |
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167 rc = (MemPointerRecord*)itr.next(); |
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168 } |
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169 } |
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170 |
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171 #endif |
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