Mercurial > hg > truffle
annotate src/share/vm/services/memSnapshot.cpp @ 7090:05ce1defa4f9
Common out some parts of UnsafeLoad/Store in UnsafeAccess
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Thu, 29 Nov 2012 13:24:08 +0100 |
parents | 8c413497f434 |
children | 49cbd3e25ba9 |
rev | line source |
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6197 | 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 #include "runtime/mutexLocker.hpp" | |
27 #include "utilities/decoder.hpp" | |
28 #include "services/memBaseline.hpp" | |
29 #include "services/memPtr.hpp" | |
30 #include "services/memPtrArray.hpp" | |
31 #include "services/memSnapshot.hpp" | |
32 #include "services/memTracker.hpp" | |
33 | |
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34 #ifdef ASSERT |
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35 |
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36 void decode_pointer_record(MemPointerRecord* rec) { |
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37 tty->print("Pointer: [" PTR_FORMAT " - " PTR_FORMAT "] size = %d bytes", rec->addr(), |
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38 rec->addr() + rec->size(), (int)rec->size()); |
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39 tty->print(" type = %s", MemBaseline::type2name(FLAGS_TO_MEMORY_TYPE(rec->flags()))); |
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40 if (rec->is_vm_pointer()) { |
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41 if (rec->is_allocation_record()) { |
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42 tty->print_cr(" (reserve)"); |
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43 } else if (rec->is_commit_record()) { |
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44 tty->print_cr(" (commit)"); |
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45 } else if (rec->is_uncommit_record()) { |
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46 tty->print_cr(" (uncommit)"); |
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47 } else if (rec->is_deallocation_record()) { |
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48 tty->print_cr(" (release)"); |
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49 } else { |
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50 tty->print_cr(" (tag)"); |
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51 } |
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52 } else { |
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53 if (rec->is_arena_memory_record()) { |
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54 tty->print_cr(" (arena size)"); |
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55 } else if (rec->is_allocation_record()) { |
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56 tty->print_cr(" (malloc)"); |
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57 } else { |
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58 tty->print_cr(" (free)"); |
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59 } |
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60 } |
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61 if (MemTracker::track_callsite()) { |
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62 char buf[1024]; |
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63 address pc = ((MemPointerRecordEx*)rec)->pc(); |
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64 if (pc != NULL && os::dll_address_to_function_name(pc, buf, sizeof(buf), NULL)) { |
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65 tty->print_cr("\tfrom %s", buf); |
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66 } else { |
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67 tty->print_cr("\tcould not decode pc = " PTR_FORMAT "", pc); |
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68 } |
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69 } |
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70 } |
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71 |
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72 void decode_vm_region_record(VMMemRegion* rec) { |
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73 tty->print("VM Region [" PTR_FORMAT " - " PTR_FORMAT "]", rec->addr(), |
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74 rec->addr() + rec->size()); |
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75 tty->print(" type = %s", MemBaseline::type2name(FLAGS_TO_MEMORY_TYPE(rec->flags()))); |
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76 if (rec->is_allocation_record()) { |
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77 tty->print_cr(" (reserved)"); |
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78 } else if (rec->is_commit_record()) { |
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79 tty->print_cr(" (committed)"); |
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80 } else { |
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81 ShouldNotReachHere(); |
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82 } |
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83 if (MemTracker::track_callsite()) { |
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84 char buf[1024]; |
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85 address pc = ((VMMemRegionEx*)rec)->pc(); |
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86 if (pc != NULL && os::dll_address_to_function_name(pc, buf, sizeof(buf), NULL)) { |
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87 tty->print_cr("\tfrom %s", buf); |
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88 } else { |
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89 tty->print_cr("\tcould not decode pc = " PTR_FORMAT "", pc); |
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90 } |
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91 |
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92 } |
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93 } |
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94 |
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95 #endif |
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96 |
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97 |
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98 bool VMMemPointerIterator::insert_record(MemPointerRecord* rec) { |
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99 VMMemRegionEx new_rec; |
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100 assert(rec->is_allocation_record() || rec->is_commit_record(), |
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101 "Sanity check"); |
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102 if (MemTracker::track_callsite()) { |
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103 new_rec.init((MemPointerRecordEx*)rec); |
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104 } else { |
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105 new_rec.init(rec); |
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106 } |
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107 return insert(&new_rec); |
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108 } |
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109 |
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110 bool VMMemPointerIterator::insert_record_after(MemPointerRecord* rec) { |
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111 VMMemRegionEx new_rec; |
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112 assert(rec->is_allocation_record() || rec->is_commit_record(), |
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113 "Sanity check"); |
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114 if (MemTracker::track_callsite()) { |
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115 new_rec.init((MemPointerRecordEx*)rec); |
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116 } else { |
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117 new_rec.init(rec); |
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118 } |
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119 return insert_after(&new_rec); |
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120 } |
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121 |
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122 // we don't consolidate reserved regions, since they may be categorized |
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123 // in different types. |
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124 bool VMMemPointerIterator::add_reserved_region(MemPointerRecord* rec) { |
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125 assert(rec->is_allocation_record(), "Sanity check"); |
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126 VMMemRegion* reserved_region = (VMMemRegion*)current(); |
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127 |
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128 // we don't have anything yet |
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129 if (reserved_region == NULL) { |
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130 return insert_record(rec); |
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131 } |
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132 |
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133 assert(reserved_region->is_reserved_region(), "Sanity check"); |
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134 // duplicated records |
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135 if (reserved_region->is_same_region(rec)) { |
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136 return true; |
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137 } |
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138 // Overlapping stack regions indicate that a JNI thread failed to |
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139 // detach from the VM before exiting. This leaks the JavaThread object. |
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140 if (CheckJNICalls) { |
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141 guarantee(FLAGS_TO_MEMORY_TYPE(reserved_region->flags()) != mtThreadStack || |
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142 !reserved_region->overlaps_region(rec), |
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143 "Attached JNI thread exited without being detached"); |
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144 } |
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145 // otherwise, we should not have overlapping reserved regions |
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146 assert(FLAGS_TO_MEMORY_TYPE(reserved_region->flags()) == mtThreadStack || |
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147 reserved_region->base() > rec->addr(), "Just check: locate()"); |
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148 assert(FLAGS_TO_MEMORY_TYPE(reserved_region->flags()) == mtThreadStack || |
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149 !reserved_region->overlaps_region(rec), "overlapping reserved regions"); |
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150 |
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151 return insert_record(rec); |
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152 } |
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153 |
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154 // we do consolidate committed regions |
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155 bool VMMemPointerIterator::add_committed_region(MemPointerRecord* rec) { |
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156 assert(rec->is_commit_record(), "Sanity check"); |
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157 VMMemRegion* reserved_rgn = (VMMemRegion*)current(); |
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158 assert(reserved_rgn->is_reserved_region() && reserved_rgn->contains_region(rec), |
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159 "Sanity check"); |
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160 |
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161 // thread's native stack is always marked as "committed", ignore |
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162 // the "commit" operation for creating stack guard pages |
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163 if (FLAGS_TO_MEMORY_TYPE(reserved_rgn->flags()) == mtThreadStack && |
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164 FLAGS_TO_MEMORY_TYPE(rec->flags()) != mtThreadStack) { |
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165 return true; |
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166 } |
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167 |
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168 // if the reserved region has any committed regions |
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169 VMMemRegion* committed_rgn = (VMMemRegion*)next(); |
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170 while (committed_rgn != NULL && committed_rgn->is_committed_region()) { |
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171 // duplicated commit records |
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172 if(committed_rgn->contains_region(rec)) { |
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173 return true; |
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174 } else if (committed_rgn->overlaps_region(rec)) { |
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175 // overlaps front part |
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176 if (rec->addr() < committed_rgn->addr()) { |
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177 committed_rgn->expand_region(rec->addr(), |
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178 committed_rgn->addr() - rec->addr()); |
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179 } else { |
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180 // overlaps tail part |
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181 address committed_rgn_end = committed_rgn->addr() + |
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182 committed_rgn->size(); |
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183 assert(committed_rgn_end < rec->addr() + rec->size(), |
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184 "overlap tail part"); |
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185 committed_rgn->expand_region(committed_rgn_end, |
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186 (rec->addr() + rec->size()) - committed_rgn_end); |
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187 } |
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188 } else if (committed_rgn->base() + committed_rgn->size() == rec->addr()) { |
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189 // adjunct each other |
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190 committed_rgn->expand_region(rec->addr(), rec->size()); |
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191 VMMemRegion* next_reg = (VMMemRegion*)next(); |
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192 // see if we can consolidate next committed region |
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193 if (next_reg != NULL && next_reg->is_committed_region() && |
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194 next_reg->base() == committed_rgn->base() + committed_rgn->size()) { |
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195 committed_rgn->expand_region(next_reg->base(), next_reg->size()); |
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196 // delete merged region |
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197 remove(); |
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198 } |
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199 return true; |
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200 } else if (committed_rgn->base() > rec->addr()) { |
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201 // found the location, insert this committed region |
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202 return insert_record(rec); |
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203 } |
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204 committed_rgn = (VMMemRegion*)next(); |
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205 } |
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206 return insert_record(rec); |
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207 } |
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208 |
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209 bool VMMemPointerIterator::remove_uncommitted_region(MemPointerRecord* rec) { |
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210 assert(rec->is_uncommit_record(), "sanity check"); |
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211 VMMemRegion* cur; |
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212 cur = (VMMemRegion*)current(); |
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213 assert(cur->is_reserved_region() && cur->contains_region(rec), |
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214 "Sanity check"); |
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215 // thread's native stack is always marked as "committed", ignore |
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216 // the "commit" operation for creating stack guard pages |
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217 if (FLAGS_TO_MEMORY_TYPE(cur->flags()) == mtThreadStack && |
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218 FLAGS_TO_MEMORY_TYPE(rec->flags()) != mtThreadStack) { |
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219 return true; |
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220 } |
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221 |
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222 cur = (VMMemRegion*)next(); |
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223 while (cur != NULL && cur->is_committed_region()) { |
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224 // region already uncommitted, must be due to duplicated record |
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225 if (cur->addr() >= rec->addr() + rec->size()) { |
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226 break; |
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227 } else if (cur->contains_region(rec)) { |
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228 // uncommit whole region |
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229 if (cur->is_same_region(rec)) { |
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230 remove(); |
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231 break; |
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232 } else if (rec->addr() == cur->addr() || |
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233 rec->addr() + rec->size() == cur->addr() + cur->size()) { |
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234 // uncommitted from either end of current memory region. |
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235 cur->exclude_region(rec->addr(), rec->size()); |
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236 break; |
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237 } else { // split the committed region and release the middle |
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238 address high_addr = cur->addr() + cur->size(); |
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239 size_t sz = high_addr - rec->addr(); |
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240 cur->exclude_region(rec->addr(), sz); |
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241 sz = high_addr - (rec->addr() + rec->size()); |
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242 if (MemTracker::track_callsite()) { |
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243 MemPointerRecordEx tmp(rec->addr() + rec->size(), cur->flags(), sz, |
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244 ((VMMemRegionEx*)cur)->pc()); |
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245 return insert_record_after(&tmp); |
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246 } else { |
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247 MemPointerRecord tmp(rec->addr() + rec->size(), cur->flags(), sz); |
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248 return insert_record_after(&tmp); |
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249 } |
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250 } |
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251 } |
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252 cur = (VMMemRegion*)next(); |
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253 } |
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254 |
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255 // we may not find committed record due to duplicated records |
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256 return true; |
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257 } |
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258 |
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259 bool VMMemPointerIterator::remove_released_region(MemPointerRecord* rec) { |
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260 assert(rec->is_deallocation_record(), "Sanity check"); |
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261 VMMemRegion* cur = (VMMemRegion*)current(); |
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262 assert(cur->is_reserved_region() && cur->contains_region(rec), |
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263 "Sanity check"); |
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264 #ifdef ASSERT |
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265 VMMemRegion* next_reg = (VMMemRegion*)peek_next(); |
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266 // should not have any committed memory in this reserved region |
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267 assert(next_reg == NULL || !next_reg->is_committed_region(), "Sanity check"); |
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268 #endif |
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269 if (rec->is_same_region(cur)) { |
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270 remove(); |
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271 } else if (rec->addr() == cur->addr() || |
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272 rec->addr() + rec->size() == cur->addr() + cur->size()) { |
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273 // released region is at either end of this region |
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274 cur->exclude_region(rec->addr(), rec->size()); |
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275 } else { // split the reserved region and release the middle |
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276 address high_addr = cur->addr() + cur->size(); |
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277 size_t sz = high_addr - rec->addr(); |
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278 cur->exclude_region(rec->addr(), sz); |
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279 sz = high_addr - rec->addr() - rec->size(); |
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280 if (MemTracker::track_callsite()) { |
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281 MemPointerRecordEx tmp(rec->addr() + rec->size(), cur->flags(), sz, |
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282 ((VMMemRegionEx*)cur)->pc()); |
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283 return insert_reserved_region(&tmp); |
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284 } else { |
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285 MemPointerRecord tmp(rec->addr() + rec->size(), cur->flags(), sz); |
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286 return insert_reserved_region(&tmp); |
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287 } |
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288 } |
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289 return true; |
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290 } |
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291 |
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292 bool VMMemPointerIterator::insert_reserved_region(MemPointerRecord* rec) { |
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293 // skip all 'commit' records associated with previous reserved region |
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294 VMMemRegion* p = (VMMemRegion*)next(); |
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295 while (p != NULL && p->is_committed_region() && |
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296 p->base() + p->size() < rec->addr()) { |
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297 p = (VMMemRegion*)next(); |
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298 } |
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299 return insert_record(rec); |
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300 } |
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301 |
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302 bool VMMemPointerIterator::split_reserved_region(VMMemRegion* rgn, address new_rgn_addr, size_t new_rgn_size) { |
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303 assert(rgn->contains_region(new_rgn_addr, new_rgn_size), "Not fully contained"); |
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304 address pc = (MemTracker::track_callsite() ? ((VMMemRegionEx*)rgn)->pc() : NULL); |
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305 if (rgn->base() == new_rgn_addr) { // new region is at the beginning of the region |
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306 size_t sz = rgn->size() - new_rgn_size; |
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307 // the original region becomes 'new' region |
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308 rgn->exclude_region(new_rgn_addr + new_rgn_size, sz); |
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309 // remaining becomes next region |
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310 MemPointerRecordEx next_rgn(new_rgn_addr + new_rgn_size, rgn->flags(), sz, pc); |
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311 return insert_reserved_region(&next_rgn); |
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312 } else if (rgn->base() + rgn->size() == new_rgn_addr + new_rgn_size) { |
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313 rgn->exclude_region(new_rgn_addr, new_rgn_size); |
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314 MemPointerRecordEx next_rgn(new_rgn_addr, rgn->flags(), new_rgn_size, pc); |
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315 return insert_reserved_region(&next_rgn); |
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316 } else { |
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317 // the orginal region will be split into three |
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318 address rgn_high_addr = rgn->base() + rgn->size(); |
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319 // first region |
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320 rgn->exclude_region(new_rgn_addr, (rgn_high_addr - new_rgn_addr)); |
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321 // the second region is the new region |
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322 MemPointerRecordEx new_rgn(new_rgn_addr, rgn->flags(), new_rgn_size, pc); |
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323 if (!insert_reserved_region(&new_rgn)) return false; |
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324 // the remaining region |
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325 MemPointerRecordEx rem_rgn(new_rgn_addr + new_rgn_size, rgn->flags(), |
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326 rgn_high_addr - (new_rgn_addr + new_rgn_size), pc); |
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327 return insert_reserved_region(&rem_rgn); |
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328 } |
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329 } |
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330 |
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331 static int sort_in_seq_order(const void* p1, const void* p2) { |
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332 assert(p1 != NULL && p2 != NULL, "Sanity check"); |
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333 const MemPointerRecord* mp1 = (MemPointerRecord*)p1; |
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334 const MemPointerRecord* mp2 = (MemPointerRecord*)p2; |
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335 return (mp1->seq() - mp2->seq()); |
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336 } |
6197 | 337 |
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338 bool StagingArea::init() { |
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339 if (MemTracker::track_callsite()) { |
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340 _malloc_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecordEx>(); |
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341 _vm_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecordEx>(); |
6197 | 342 } else { |
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343 _malloc_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecord>(); |
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344 _vm_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecord>(); |
6197 | 345 } |
346 | |
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347 if (_malloc_data != NULL && _vm_data != NULL && |
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348 !_malloc_data->out_of_memory() && |
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349 !_vm_data->out_of_memory()) { |
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350 return true; |
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351 } else { |
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352 if (_malloc_data != NULL) delete _malloc_data; |
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353 if (_vm_data != NULL) delete _vm_data; |
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354 _malloc_data = NULL; |
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355 _vm_data = NULL; |
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356 return false; |
6197 | 357 } |
358 } | |
359 | |
360 | |
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361 VMRecordIterator StagingArea::virtual_memory_record_walker() { |
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362 MemPointerArray* arr = vm_data(); |
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363 // sort into seq number order |
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364 arr->sort((FN_SORT)sort_in_seq_order); |
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365 return VMRecordIterator(arr); |
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366 } |
6197 | 367 |
368 | |
369 MemSnapshot::MemSnapshot() { | |
370 if (MemTracker::track_callsite()) { | |
371 _alloc_ptrs = new (std::nothrow) MemPointerArrayImpl<MemPointerRecordEx>(); | |
372 _vm_ptrs = new (std::nothrow)MemPointerArrayImpl<VMMemRegionEx>(64, true); | |
373 } else { | |
374 _alloc_ptrs = new (std::nothrow) MemPointerArrayImpl<MemPointerRecord>(); | |
375 _vm_ptrs = new (std::nothrow)MemPointerArrayImpl<VMMemRegion>(64, true); | |
376 } | |
377 | |
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378 _staging_area.init(); |
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379 _lock = new (std::nothrow) Mutex(Monitor::max_nonleaf - 1, "memSnapshotLock"); |
6197 | 380 NOT_PRODUCT(_untracked_count = 0;) |
381 } | |
382 | |
383 MemSnapshot::~MemSnapshot() { | |
384 assert(MemTracker::shutdown_in_progress(), "native memory tracking still on"); | |
385 { | |
386 MutexLockerEx locker(_lock); | |
387 if (_alloc_ptrs != NULL) { | |
388 delete _alloc_ptrs; | |
389 _alloc_ptrs = NULL; | |
390 } | |
391 | |
392 if (_vm_ptrs != NULL) { | |
393 delete _vm_ptrs; | |
394 _vm_ptrs = NULL; | |
395 } | |
396 } | |
397 | |
398 if (_lock != NULL) { | |
399 delete _lock; | |
400 _lock = NULL; | |
401 } | |
402 } | |
403 | |
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404 |
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405 void MemSnapshot::copy_seq_pointer(MemPointerRecord* dest, const MemPointerRecord* src) { |
6197 | 406 assert(dest != NULL && src != NULL, "Just check"); |
407 assert(dest->addr() == src->addr(), "Just check"); | |
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408 assert(dest->seq() > 0 && src->seq() > 0, "not sequenced"); |
6197 | 409 |
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410 if (MemTracker::track_callsite()) { |
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411 *(SeqMemPointerRecordEx*)dest = *(SeqMemPointerRecordEx*)src; |
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412 } else { |
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413 *(SeqMemPointerRecord*)dest = *(SeqMemPointerRecord*)src; |
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414 } |
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415 } |
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416 |
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417 void MemSnapshot::assign_pointer(MemPointerRecord*dest, const MemPointerRecord* src) { |
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418 assert(src != NULL && dest != NULL, "Just check"); |
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419 assert(dest->seq() == 0 && src->seq() >0, "cast away sequence"); |
6197 | 420 |
421 if (MemTracker::track_callsite()) { | |
422 *(MemPointerRecordEx*)dest = *(MemPointerRecordEx*)src; | |
423 } else { | |
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424 *(MemPointerRecord*)dest = *(MemPointerRecord*)src; |
6197 | 425 } |
426 } | |
427 | |
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428 // merge a recorder to the staging area |
6197 | 429 bool MemSnapshot::merge(MemRecorder* rec) { |
430 assert(rec != NULL && !rec->out_of_memory(), "Just check"); | |
431 | |
432 SequencedRecordIterator itr(rec->pointer_itr()); | |
433 | |
434 MutexLockerEx lock(_lock, true); | |
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435 MemPointerIterator malloc_staging_itr(_staging_area.malloc_data()); |
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436 MemPointerRecord* incoming_rec = (MemPointerRecord*) itr.current(); |
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437 MemPointerRecord* matched_rec; |
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438 |
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439 while (incoming_rec != NULL) { |
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440 if (incoming_rec->is_vm_pointer()) { |
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441 // we don't do anything with virtual memory records during merge |
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442 if (!_staging_area.vm_data()->append(incoming_rec)) { |
6197 | 443 return false; |
444 } | |
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445 } else { |
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446 // locate matched record and/or also position the iterator to proper |
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447 // location for this incoming record. |
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448 matched_rec = (MemPointerRecord*)malloc_staging_itr.locate(incoming_rec->addr()); |
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449 // we have not seen this memory block in this generation, |
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450 // so just add to staging area |
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451 if (matched_rec == NULL) { |
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452 if (!malloc_staging_itr.insert(incoming_rec)) { |
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453 return false; |
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454 } |
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455 } else if (incoming_rec->addr() == matched_rec->addr()) { |
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456 // whoever has higher sequence number wins |
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457 if (incoming_rec->seq() > matched_rec->seq()) { |
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458 copy_seq_pointer(matched_rec, incoming_rec); |
6197 | 459 } |
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460 } else if (incoming_rec->addr() < matched_rec->addr()) { |
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461 if (!malloc_staging_itr.insert(incoming_rec)) { |
6197 | 462 return false; |
463 } | |
464 } else { | |
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465 ShouldNotReachHere(); |
6197 | 466 } |
467 } | |
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468 incoming_rec = (MemPointerRecord*)itr.next(); |
6197 | 469 } |
470 NOT_PRODUCT(void check_staging_data();) | |
471 return true; | |
472 } | |
473 | |
474 | |
475 // promote data to next generation | |
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476 bool MemSnapshot::promote() { |
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477 assert(_alloc_ptrs != NULL && _vm_ptrs != NULL, "Just check"); |
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478 assert(_staging_area.malloc_data() != NULL && _staging_area.vm_data() != NULL, |
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479 "Just check"); |
6197 | 480 MutexLockerEx lock(_lock, true); |
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481 |
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482 MallocRecordIterator malloc_itr = _staging_area.malloc_record_walker(); |
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483 bool promoted = false; |
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484 if (promote_malloc_records(&malloc_itr)) { |
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485 VMRecordIterator vm_itr = _staging_area.virtual_memory_record_walker(); |
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486 if (promote_virtual_memory_records(&vm_itr)) { |
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487 promoted = true; |
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488 } |
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489 } |
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490 |
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491 NOT_PRODUCT(check_malloc_pointers();) |
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492 _staging_area.clear(); |
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493 return promoted; |
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494 } |
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495 |
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496 bool MemSnapshot::promote_malloc_records(MemPointerArrayIterator* itr) { |
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497 MemPointerIterator malloc_snapshot_itr(_alloc_ptrs); |
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498 MemPointerRecord* new_rec = (MemPointerRecord*)itr->current(); |
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499 MemPointerRecord* matched_rec; |
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500 while (new_rec != NULL) { |
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501 matched_rec = (MemPointerRecord*)malloc_snapshot_itr.locate(new_rec->addr()); |
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502 // found matched memory block |
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503 if (matched_rec != NULL && new_rec->addr() == matched_rec->addr()) { |
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504 // snapshot already contains 'live' records |
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505 assert(matched_rec->is_allocation_record() || matched_rec->is_arena_memory_record(), |
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506 "Sanity check"); |
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507 // update block states |
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508 if (new_rec->is_allocation_record()) { |
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509 assign_pointer(matched_rec, new_rec); |
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510 } else if (new_rec->is_arena_memory_record()) { |
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511 if (new_rec->size() == 0) { |
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512 // remove size record once size drops to 0 |
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513 malloc_snapshot_itr.remove(); |
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514 } else { |
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515 assign_pointer(matched_rec, new_rec); |
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516 } |
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517 } else { |
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518 // a deallocation record |
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519 assert(new_rec->is_deallocation_record(), "Sanity check"); |
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520 // an arena record can be followed by a size record, we need to remove both |
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521 if (matched_rec->is_arena_record()) { |
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522 MemPointerRecord* next = (MemPointerRecord*)malloc_snapshot_itr.peek_next(); |
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523 if (next->is_arena_memory_record() && next->is_memory_record_of_arena(matched_rec)) { |
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524 malloc_snapshot_itr.remove(); |
6197 | 525 } |
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526 } |
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527 // the memory is deallocated, remove related record(s) |
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528 malloc_snapshot_itr.remove(); |
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529 } |
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530 } else { |
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531 // don't insert size 0 record |
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532 if (new_rec->is_arena_memory_record() && new_rec->size() == 0) { |
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533 new_rec = NULL; |
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534 } |
6979
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535 |
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536 if (new_rec != NULL) { |
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537 if (new_rec->is_allocation_record() || new_rec->is_arena_memory_record()) { |
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538 if (matched_rec != NULL && new_rec->addr() > matched_rec->addr()) { |
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539 if (!malloc_snapshot_itr.insert_after(new_rec)) { |
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540 return false; |
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541 } |
6197 | 542 } else { |
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543 if (!malloc_snapshot_itr.insert(new_rec)) { |
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544 return false; |
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545 } |
6197 | 546 } |
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547 } |
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548 #ifndef PRODUCT |
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549 else if (!has_allocation_record(new_rec->addr())) { |
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550 // NMT can not track some startup memory, which is allocated before NMT is on |
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551 _untracked_count ++; |
6197 | 552 } |
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553 #endif |
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554 } |
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555 } |
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556 new_rec = (MemPointerRecord*)itr->next(); |
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557 } |
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558 return true; |
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559 } |
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560 |
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561 bool MemSnapshot::promote_virtual_memory_records(MemPointerArrayIterator* itr) { |
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562 VMMemPointerIterator vm_snapshot_itr(_vm_ptrs); |
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563 MemPointerRecord* new_rec = (MemPointerRecord*)itr->current(); |
6882
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564 VMMemRegion* reserved_rec; |
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565 while (new_rec != NULL) { |
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566 assert(new_rec->is_vm_pointer(), "Sanity check"); |
6882
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567 |
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568 // locate a reserved region that contains the specified address, or |
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569 // the nearest reserved region has base address just above the specified |
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570 // address |
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571 reserved_rec = (VMMemRegion*)vm_snapshot_itr.locate(new_rec->addr()); |
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572 if (reserved_rec != NULL && reserved_rec->contains_region(new_rec)) { |
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573 // snapshot can only have 'live' records |
6882
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574 assert(reserved_rec->is_reserved_region(), "Sanity check"); |
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575 if (new_rec->is_allocation_record()) { |
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576 if (!reserved_rec->is_same_region(new_rec)) { |
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577 // only deal with split a bigger reserved region into smaller regions. |
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578 // So far, CDS is the only use case. |
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579 if (!vm_snapshot_itr.split_reserved_region(reserved_rec, new_rec->addr(), new_rec->size())) { |
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580 return false; |
6197 | 581 } |
582 } | |
6882
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583 } else if (new_rec->is_uncommit_record()) { |
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584 if (!vm_snapshot_itr.remove_uncommitted_region(new_rec)) { |
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585 return false; |
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586 } |
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587 } else if (new_rec->is_commit_record()) { |
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588 // insert or expand existing committed region to cover this |
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|
589 // newly committed region |
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590 if (!vm_snapshot_itr.add_committed_region(new_rec)) { |
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591 return false; |
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|
592 } |
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593 } else if (new_rec->is_deallocation_record()) { |
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594 // release part or all memory region |
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595 if (!vm_snapshot_itr.remove_released_region(new_rec)) { |
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596 return false; |
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|
597 } |
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598 } else if (new_rec->is_type_tagging_record()) { |
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599 // tag this reserved virtual memory range to a memory type. Can not re-tag a memory range |
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600 // to different type. |
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|
601 assert(FLAGS_TO_MEMORY_TYPE(reserved_rec->flags()) == mtNone || |
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602 FLAGS_TO_MEMORY_TYPE(reserved_rec->flags()) == FLAGS_TO_MEMORY_TYPE(new_rec->flags()), |
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603 "Sanity check"); |
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|
604 reserved_rec->tag(new_rec->flags()); |
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605 } else { |
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|
606 ShouldNotReachHere(); |
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|
607 } |
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|
608 } else { |
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|
609 /* |
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|
610 * The assertion failure indicates mis-matched virtual memory records. The likely |
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|
611 * scenario is, that some virtual memory operations are not going through os::xxxx_memory() |
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612 * api, which have to be tracked manually. (perfMemory is an example). |
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|
613 */ |
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|
614 assert(new_rec->is_allocation_record(), "Sanity check"); |
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615 if (!vm_snapshot_itr.add_reserved_region(new_rec)) { |
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|
616 return false; |
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|
617 } |
6741
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618 } |
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|
619 new_rec = (MemPointerRecord*)itr->next(); |
6197 | 620 } |
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621 return true; |
6197 | 622 } |
623 | |
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|
624 #ifndef PRODUCT |
6197 | 625 void MemSnapshot::print_snapshot_stats(outputStream* st) { |
626 st->print_cr("Snapshot:"); | |
627 st->print_cr("\tMalloced: %d/%d [%5.2f%%] %dKB", _alloc_ptrs->length(), _alloc_ptrs->capacity(), | |
628 (100.0 * (float)_alloc_ptrs->length()) / (float)_alloc_ptrs->capacity(), _alloc_ptrs->instance_size()/K); | |
629 | |
630 st->print_cr("\tVM: %d/%d [%5.2f%%] %dKB", _vm_ptrs->length(), _vm_ptrs->capacity(), | |
631 (100.0 * (float)_vm_ptrs->length()) / (float)_vm_ptrs->capacity(), _vm_ptrs->instance_size()/K); | |
632 | |
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633 st->print_cr("\tMalloc staging Area: %d/%d [%5.2f%%] %dKB", _staging_area.malloc_data()->length(), |
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|
634 _staging_area.malloc_data()->capacity(), |
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635 (100.0 * (float)_staging_area.malloc_data()->length()) / (float)_staging_area.malloc_data()->capacity(), |
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636 _staging_area.malloc_data()->instance_size()/K); |
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|
637 |
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638 st->print_cr("\tVirtual memory staging Area: %d/%d [%5.2f%%] %dKB", _staging_area.vm_data()->length(), |
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639 _staging_area.vm_data()->capacity(), |
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640 (100.0 * (float)_staging_area.vm_data()->length()) / (float)_staging_area.vm_data()->capacity(), |
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|
641 _staging_area.vm_data()->instance_size()/K); |
6197 | 642 |
643 st->print_cr("\tUntracked allocation: %d", _untracked_count); | |
644 } | |
645 | |
646 void MemSnapshot::check_malloc_pointers() { | |
647 MemPointerArrayIteratorImpl mItr(_alloc_ptrs); | |
648 MemPointerRecord* p = (MemPointerRecord*)mItr.current(); | |
649 MemPointerRecord* prev = NULL; | |
650 while (p != NULL) { | |
651 if (prev != NULL) { | |
652 assert(p->addr() >= prev->addr(), "sorting order"); | |
653 } | |
654 prev = p; | |
655 p = (MemPointerRecord*)mItr.next(); | |
656 } | |
657 } | |
658 | |
6607
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659 bool MemSnapshot::has_allocation_record(address addr) { |
6741
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660 MemPointerArrayIteratorImpl itr(_staging_area.malloc_data()); |
6607
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661 MemPointerRecord* cur = (MemPointerRecord*)itr.current(); |
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662 while (cur != NULL) { |
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663 if (cur->addr() == addr && cur->is_allocation_record()) { |
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664 return true; |
e5bf1c79ed5b
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|
665 } |
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666 cur = (MemPointerRecord*)itr.next(); |
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|
667 } |
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668 return false; |
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669 } |
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670 #endif // PRODUCT |
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671 |
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672 #ifdef ASSERT |
6197 | 673 void MemSnapshot::check_staging_data() { |
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674 MemPointerArrayIteratorImpl itr(_staging_area.malloc_data()); |
6197 | 675 MemPointerRecord* cur = (MemPointerRecord*)itr.current(); |
676 MemPointerRecord* next = (MemPointerRecord*)itr.next(); | |
677 while (next != NULL) { | |
678 assert((next->addr() > cur->addr()) || | |
679 ((next->flags() & MemPointerRecord::tag_masks) > | |
680 (cur->flags() & MemPointerRecord::tag_masks)), | |
681 "sorting order"); | |
682 cur = next; | |
683 next = (MemPointerRecord*)itr.next(); | |
684 } | |
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685 |
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686 MemPointerArrayIteratorImpl vm_itr(_staging_area.vm_data()); |
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687 cur = (MemPointerRecord*)vm_itr.current(); |
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688 while (cur != NULL) { |
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689 assert(cur->is_vm_pointer(), "virtual memory pointer only"); |
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690 cur = (MemPointerRecord*)vm_itr.next(); |
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691 } |
6197 | 692 } |
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693 |
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694 void MemSnapshot::dump_all_vm_pointers() { |
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695 MemPointerArrayIteratorImpl itr(_vm_ptrs); |
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696 VMMemRegion* ptr = (VMMemRegion*)itr.current(); |
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697 tty->print_cr("dump virtual memory pointers:"); |
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698 while (ptr != NULL) { |
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699 if (ptr->is_committed_region()) { |
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700 tty->print("\t"); |
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701 } |
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702 tty->print("[" PTR_FORMAT " - " PTR_FORMAT "] [%x]", ptr->addr(), |
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703 (ptr->addr() + ptr->size()), ptr->flags()); |
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704 |
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705 if (MemTracker::track_callsite()) { |
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706 VMMemRegionEx* ex = (VMMemRegionEx*)ptr; |
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707 if (ex->pc() != NULL) { |
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708 char buf[1024]; |
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709 if (os::dll_address_to_function_name(ex->pc(), buf, sizeof(buf), NULL)) { |
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710 tty->print_cr("\t%s", buf); |
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711 } else { |
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712 tty->print_cr(""); |
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713 } |
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714 } |
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715 } |
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716 |
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717 ptr = (VMMemRegion*)itr.next(); |
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718 } |
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719 tty->flush(); |
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720 } |
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721 #endif // ASSERT |
6197 | 722 |