Mercurial > hg > graal-jvmci-8
annotate src/share/vm/services/memSnapshot.cpp @ 6768:716e6ef4482a
7190089: NMT ON: NMT failed assertion on thread's stack base address
Summary: Solaris only, record stack info to NMT after stack size adjustment was made for primordial threads
Reviewed-by: kvn, acorn, coleenp
author | zgu |
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date | Mon, 17 Sep 2012 10:20:04 -0400 |
parents | 33143ee07800 |
children | 716c64bda5ba |
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 static int sort_in_seq_order(const void* p1, const void* p2) { |
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35 assert(p1 != NULL && p2 != NULL, "Sanity check"); |
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36 const MemPointerRecord* mp1 = (MemPointerRecord*)p1; |
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37 const MemPointerRecord* mp2 = (MemPointerRecord*)p2; |
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38 return (mp1->seq() - mp2->seq()); |
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39 } |
6197 | 40 |
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41 bool StagingArea::init() { |
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42 if (MemTracker::track_callsite()) { |
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43 _malloc_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecordEx>(); |
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44 _vm_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecordEx>(); |
6197 | 45 } else { |
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46 _malloc_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecord>(); |
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47 _vm_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecord>(); |
6197 | 48 } |
49 | |
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50 if (_malloc_data != NULL && _vm_data != NULL && |
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51 !_malloc_data->out_of_memory() && |
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52 !_vm_data->out_of_memory()) { |
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53 return true; |
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54 } else { |
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55 if (_malloc_data != NULL) delete _malloc_data; |
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56 if (_vm_data != NULL) delete _vm_data; |
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57 _malloc_data = NULL; |
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58 _vm_data = NULL; |
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59 return false; |
6197 | 60 } |
61 } | |
62 | |
63 | |
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64 MemPointerArrayIteratorImpl StagingArea::virtual_memory_record_walker() { |
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65 MemPointerArray* arr = vm_data(); |
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66 // sort into seq number order |
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67 arr->sort((FN_SORT)sort_in_seq_order); |
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68 return MemPointerArrayIteratorImpl(arr); |
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69 } |
6197 | 70 |
71 | |
72 MemSnapshot::MemSnapshot() { | |
73 if (MemTracker::track_callsite()) { | |
74 _alloc_ptrs = new (std::nothrow) MemPointerArrayImpl<MemPointerRecordEx>(); | |
75 _vm_ptrs = new (std::nothrow)MemPointerArrayImpl<VMMemRegionEx>(64, true); | |
76 } else { | |
77 _alloc_ptrs = new (std::nothrow) MemPointerArrayImpl<MemPointerRecord>(); | |
78 _vm_ptrs = new (std::nothrow)MemPointerArrayImpl<VMMemRegion>(64, true); | |
79 } | |
80 | |
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81 _staging_area.init(); |
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82 _lock = new (std::nothrow) Mutex(Monitor::max_nonleaf - 1, "memSnapshotLock"); |
6197 | 83 NOT_PRODUCT(_untracked_count = 0;) |
84 } | |
85 | |
86 MemSnapshot::~MemSnapshot() { | |
87 assert(MemTracker::shutdown_in_progress(), "native memory tracking still on"); | |
88 { | |
89 MutexLockerEx locker(_lock); | |
90 if (_alloc_ptrs != NULL) { | |
91 delete _alloc_ptrs; | |
92 _alloc_ptrs = NULL; | |
93 } | |
94 | |
95 if (_vm_ptrs != NULL) { | |
96 delete _vm_ptrs; | |
97 _vm_ptrs = NULL; | |
98 } | |
99 } | |
100 | |
101 if (_lock != NULL) { | |
102 delete _lock; | |
103 _lock = NULL; | |
104 } | |
105 } | |
106 | |
107 void MemSnapshot::copy_pointer(MemPointerRecord* dest, const MemPointerRecord* src) { | |
108 assert(dest != NULL && src != NULL, "Just check"); | |
109 assert(dest->addr() == src->addr(), "Just check"); | |
110 | |
111 MEMFLAGS flags = dest->flags(); | |
112 | |
113 if (MemTracker::track_callsite()) { | |
114 *(MemPointerRecordEx*)dest = *(MemPointerRecordEx*)src; | |
115 } else { | |
116 *dest = *src; | |
117 } | |
118 } | |
119 | |
120 | |
121 // merge a per-thread memory recorder to the staging area | |
122 bool MemSnapshot::merge(MemRecorder* rec) { | |
123 assert(rec != NULL && !rec->out_of_memory(), "Just check"); | |
124 | |
125 SequencedRecordIterator itr(rec->pointer_itr()); | |
126 | |
127 MutexLockerEx lock(_lock, true); | |
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128 MemPointerIterator malloc_staging_itr(_staging_area.malloc_data()); |
6197 | 129 MemPointerRecord *p1, *p2; |
130 p1 = (MemPointerRecord*) itr.current(); | |
131 while (p1 != NULL) { | |
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132 if (p1->is_vm_pointer()) { |
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133 // we don't do anything with virtual memory records during merge |
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134 if (!_staging_area.vm_data()->append(p1)) { |
6197 | 135 return false; |
136 } | |
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137 } else { |
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138 p2 = (MemPointerRecord*)malloc_staging_itr.locate(p1->addr()); |
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139 // we have not seen this memory block, so just add to staging area |
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140 if (p2 == NULL) { |
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141 if (!malloc_staging_itr.insert(p1)) { |
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142 return false; |
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143 } |
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144 } else if (p1->addr() == p2->addr()) { |
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145 MemPointerRecord* staging_next = (MemPointerRecord*)malloc_staging_itr.peek_next(); |
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146 // a memory block can have many tagging records, find right one to replace or |
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147 // right position to insert |
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148 while (staging_next != NULL && staging_next->addr() == p1->addr()) { |
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149 if ((staging_next->flags() & MemPointerRecord::tag_masks) <= |
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150 (p1->flags() & MemPointerRecord::tag_masks)) { |
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151 p2 = (MemPointerRecord*)malloc_staging_itr.next(); |
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152 staging_next = (MemPointerRecord*)malloc_staging_itr.peek_next(); |
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153 } else { |
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154 break; |
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155 } |
6197 | 156 } |
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157 int df = (p1->flags() & MemPointerRecord::tag_masks) - |
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158 (p2->flags() & MemPointerRecord::tag_masks); |
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159 if (df == 0) { |
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160 assert(p1->seq() > 0, "not sequenced"); |
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161 assert(p2->seq() > 0, "not sequenced"); |
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162 if (p1->seq() > p2->seq()) { |
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163 copy_pointer(p2, p1); |
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164 } |
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165 } else if (df < 0) { |
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166 if (!malloc_staging_itr.insert(p1)) { |
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167 return false; |
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168 } |
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169 } else { |
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170 if (!malloc_staging_itr.insert_after(p1)) { |
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171 return false; |
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172 } |
6197 | 173 } |
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174 } else if (p1->addr() < p2->addr()) { |
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175 if (!malloc_staging_itr.insert(p1)) { |
6197 | 176 return false; |
177 } | |
178 } else { | |
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179 if (!malloc_staging_itr.insert_after(p1)) { |
6197 | 180 return false; |
181 } | |
182 } | |
183 } | |
184 p1 = (MemPointerRecord*)itr.next(); | |
185 } | |
186 NOT_PRODUCT(void check_staging_data();) | |
187 return true; | |
188 } | |
189 | |
190 | |
191 | |
192 // promote data to next generation | |
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193 bool MemSnapshot::promote() { |
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194 assert(_alloc_ptrs != NULL && _vm_ptrs != NULL, "Just check"); |
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195 assert(_staging_area.malloc_data() != NULL && _staging_area.vm_data() != NULL, |
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196 "Just check"); |
6197 | 197 MutexLockerEx lock(_lock, true); |
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198 |
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199 MallocRecordIterator malloc_itr = _staging_area.malloc_record_walker(); |
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200 bool promoted = false; |
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201 if (promote_malloc_records(&malloc_itr)) { |
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202 MemPointerArrayIteratorImpl vm_itr = _staging_area.virtual_memory_record_walker(); |
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203 if (promote_virtual_memory_records(&vm_itr)) { |
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204 promoted = true; |
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205 } |
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206 } |
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207 |
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208 NOT_PRODUCT(check_malloc_pointers();) |
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209 _staging_area.clear(); |
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210 return promoted; |
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211 } |
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212 |
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213 bool MemSnapshot::promote_malloc_records(MemPointerArrayIterator* itr) { |
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214 MemPointerIterator malloc_snapshot_itr(_alloc_ptrs); |
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215 MemPointerRecord* new_rec = (MemPointerRecord*)itr->current(); |
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216 MemPointerRecord* matched_rec; |
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217 while (new_rec != NULL) { |
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218 matched_rec = (MemPointerRecord*)malloc_snapshot_itr.locate(new_rec->addr()); |
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219 // found matched memory block |
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220 if (matched_rec != NULL && new_rec->addr() == matched_rec->addr()) { |
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221 // snapshot already contains 'lived' records |
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222 assert(matched_rec->is_allocation_record() || matched_rec->is_arena_size_record(), |
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223 "Sanity check"); |
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224 // update block states |
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225 if (new_rec->is_allocation_record() || new_rec->is_arena_size_record()) { |
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226 copy_pointer(matched_rec, new_rec); |
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227 } else { |
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228 // a deallocation record |
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229 assert(new_rec->is_deallocation_record(), "Sanity check"); |
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230 // an arena record can be followed by a size record, we need to remove both |
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231 if (matched_rec->is_arena_record()) { |
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232 MemPointerRecord* next = (MemPointerRecord*)malloc_snapshot_itr.peek_next(); |
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233 if (next->is_arena_size_record()) { |
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234 // it has to match the arena record |
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235 assert(next->is_size_record_of_arena(matched_rec), "Sanity check"); |
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236 malloc_snapshot_itr.remove(); |
6197 | 237 } |
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238 } |
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239 // the memory is deallocated, remove related record(s) |
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240 malloc_snapshot_itr.remove(); |
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241 } |
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242 } else { |
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243 // it is a new record, insert into snapshot |
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244 if (new_rec->is_arena_size_record()) { |
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245 MemPointerRecord* prev = (MemPointerRecord*)malloc_snapshot_itr.peek_prev(); |
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246 if (prev == NULL || !prev->is_arena_record() || !new_rec->is_size_record_of_arena(prev)) { |
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247 // no matched arena record, ignore the size record |
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248 new_rec = NULL; |
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249 } |
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250 } |
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251 // only 'live' record can go into snapshot |
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252 if (new_rec != NULL) { |
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253 if (new_rec->is_allocation_record() || new_rec->is_arena_size_record()) { |
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254 if (matched_rec != NULL && new_rec->addr() > matched_rec->addr()) { |
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255 if (!malloc_snapshot_itr.insert_after(new_rec)) { |
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256 return false; |
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257 } |
6197 | 258 } else { |
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259 if (!malloc_snapshot_itr.insert(new_rec)) { |
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260 return false; |
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261 } |
6197 | 262 } |
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263 } |
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264 #ifndef PRODUCT |
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265 else if (!has_allocation_record(new_rec->addr())) { |
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266 // NMT can not track some startup memory, which is allocated before NMT is on |
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267 _untracked_count ++; |
6197 | 268 } |
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269 #endif |
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270 } |
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271 } |
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272 new_rec = (MemPointerRecord*)itr->next(); |
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273 } |
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274 return true; |
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275 } |
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276 |
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277 bool MemSnapshot::promote_virtual_memory_records(MemPointerArrayIterator* itr) { |
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278 VMMemPointerIterator vm_snapshot_itr(_vm_ptrs); |
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279 MemPointerRecord* new_rec = (MemPointerRecord*)itr->current(); |
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280 VMMemRegionEx new_vm_rec; |
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281 VMMemRegion* matched_rec; |
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282 while (new_rec != NULL) { |
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283 assert(new_rec->is_vm_pointer(), "Sanity check"); |
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284 if (MemTracker::track_callsite()) { |
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285 new_vm_rec.init((MemPointerRecordEx*)new_rec); |
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286 } else { |
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287 new_vm_rec.init(new_rec); |
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288 } |
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289 matched_rec = (VMMemRegion*)vm_snapshot_itr.locate(new_rec->addr()); |
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290 if (matched_rec != NULL && |
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291 (matched_rec->contains(&new_vm_rec) || matched_rec->base() == new_vm_rec.base())) { |
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292 // snapshot can only have 'live' records |
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293 assert(matched_rec->is_reserve_record(), "Sanity check"); |
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294 if (new_vm_rec.is_reserve_record() && matched_rec->base() == new_vm_rec.base()) { |
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295 // resize reserved virtual memory range |
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296 // resize has to cover committed area |
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297 assert(new_vm_rec.size() >= matched_rec->committed_size(), "Sanity check"); |
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298 matched_rec->set_reserved_size(new_vm_rec.size()); |
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299 } else if (new_vm_rec.is_commit_record()) { |
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300 // commit memory inside reserved memory range |
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301 assert(new_vm_rec.committed_size() <= matched_rec->reserved_size(), "Sanity check"); |
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302 // thread stacks are marked committed, so we ignore 'commit' record for creating |
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303 // stack guard pages |
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304 if (FLAGS_TO_MEMORY_TYPE(matched_rec->flags()) != mtThreadStack) { |
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305 matched_rec->commit(new_vm_rec.committed_size()); |
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306 } |
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307 } else if (new_vm_rec.is_uncommit_record()) { |
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308 if (FLAGS_TO_MEMORY_TYPE(matched_rec->flags()) == mtThreadStack) { |
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309 // ignore 'uncommit' record from removing stack guard pages, uncommit |
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310 // thread stack as whole |
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311 if (matched_rec->committed_size() == new_vm_rec.committed_size()) { |
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312 matched_rec->uncommit(new_vm_rec.committed_size()); |
6197 | 313 } |
314 } else { | |
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315 // uncommit memory inside reserved memory range |
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316 assert(new_vm_rec.committed_size() <= matched_rec->committed_size(), |
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317 "Sanity check"); |
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318 matched_rec->uncommit(new_vm_rec.committed_size()); |
6197 | 319 } |
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320 } else if (new_vm_rec.is_type_tagging_record()) { |
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321 // tag this virtual memory range to a memory type |
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322 // can not re-tag a memory range to different type |
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323 assert(FLAGS_TO_MEMORY_TYPE(matched_rec->flags()) == mtNone || |
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324 FLAGS_TO_MEMORY_TYPE(matched_rec->flags()) == FLAGS_TO_MEMORY_TYPE(new_vm_rec.flags()), |
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325 "Sanity check"); |
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326 matched_rec->tag(new_vm_rec.flags()); |
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327 } else if (new_vm_rec.is_release_record()) { |
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328 // release part or whole memory range |
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329 if (new_vm_rec.base() == matched_rec->base() && |
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330 new_vm_rec.size() == matched_rec->size()) { |
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331 // release whole virtual memory range |
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332 assert(matched_rec->committed_size() == 0, "Sanity check"); |
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333 vm_snapshot_itr.remove(); |
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334 } else { |
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335 // partial release |
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336 matched_rec->partial_release(new_vm_rec.base(), new_vm_rec.size()); |
6197 | 337 } |
338 } else { | |
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339 // multiple reserve/commit on the same virtual memory range |
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340 assert((new_vm_rec.is_reserve_record() || new_vm_rec.is_commit_record()) && |
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341 (new_vm_rec.base() == matched_rec->base() && new_vm_rec.size() == matched_rec->size()), |
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342 "Sanity check"); |
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343 matched_rec->tag(new_vm_rec.flags()); |
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344 } |
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345 } else { |
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346 // no matched record |
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347 if (new_vm_rec.is_reserve_record()) { |
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348 if (matched_rec == NULL || matched_rec->base() > new_vm_rec.base()) { |
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349 if (!vm_snapshot_itr.insert(&new_vm_rec)) { |
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350 return false; |
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351 } |
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352 } else { |
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353 if (!vm_snapshot_itr.insert_after(&new_vm_rec)) { |
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354 return false; |
6197 | 355 } |
356 } | |
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357 } else { |
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358 // throw out obsolete records, which are the commit/uncommit/release/tag records |
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359 // on memory regions that are already released. |
6197 | 360 } |
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361 } |
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362 new_rec = (MemPointerRecord*)itr->next(); |
6197 | 363 } |
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364 return true; |
6197 | 365 } |
366 | |
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367 #ifndef PRODUCT |
6197 | 368 void MemSnapshot::print_snapshot_stats(outputStream* st) { |
369 st->print_cr("Snapshot:"); | |
370 st->print_cr("\tMalloced: %d/%d [%5.2f%%] %dKB", _alloc_ptrs->length(), _alloc_ptrs->capacity(), | |
371 (100.0 * (float)_alloc_ptrs->length()) / (float)_alloc_ptrs->capacity(), _alloc_ptrs->instance_size()/K); | |
372 | |
373 st->print_cr("\tVM: %d/%d [%5.2f%%] %dKB", _vm_ptrs->length(), _vm_ptrs->capacity(), | |
374 (100.0 * (float)_vm_ptrs->length()) / (float)_vm_ptrs->capacity(), _vm_ptrs->instance_size()/K); | |
375 | |
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376 st->print_cr("\tMalloc staging Area: %d/%d [%5.2f%%] %dKB", _staging_area.malloc_data()->length(), |
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377 _staging_area.malloc_data()->capacity(), |
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378 (100.0 * (float)_staging_area.malloc_data()->length()) / (float)_staging_area.malloc_data()->capacity(), |
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379 _staging_area.malloc_data()->instance_size()/K); |
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380 |
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381 st->print_cr("\tVirtual memory staging Area: %d/%d [%5.2f%%] %dKB", _staging_area.vm_data()->length(), |
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382 _staging_area.vm_data()->capacity(), |
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383 (100.0 * (float)_staging_area.vm_data()->length()) / (float)_staging_area.vm_data()->capacity(), |
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384 _staging_area.vm_data()->instance_size()/K); |
6197 | 385 |
386 st->print_cr("\tUntracked allocation: %d", _untracked_count); | |
387 } | |
388 | |
389 void MemSnapshot::check_malloc_pointers() { | |
390 MemPointerArrayIteratorImpl mItr(_alloc_ptrs); | |
391 MemPointerRecord* p = (MemPointerRecord*)mItr.current(); | |
392 MemPointerRecord* prev = NULL; | |
393 while (p != NULL) { | |
394 if (prev != NULL) { | |
395 assert(p->addr() >= prev->addr(), "sorting order"); | |
396 } | |
397 prev = p; | |
398 p = (MemPointerRecord*)mItr.next(); | |
399 } | |
400 } | |
401 | |
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402 bool MemSnapshot::has_allocation_record(address addr) { |
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403 MemPointerArrayIteratorImpl itr(_staging_area.malloc_data()); |
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404 MemPointerRecord* cur = (MemPointerRecord*)itr.current(); |
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405 while (cur != NULL) { |
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406 if (cur->addr() == addr && cur->is_allocation_record()) { |
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407 return true; |
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408 } |
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409 cur = (MemPointerRecord*)itr.next(); |
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410 } |
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411 return false; |
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412 } |
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413 #endif // PRODUCT |
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414 |
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415 #ifdef ASSERT |
6197 | 416 void MemSnapshot::check_staging_data() { |
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417 MemPointerArrayIteratorImpl itr(_staging_area.malloc_data()); |
6197 | 418 MemPointerRecord* cur = (MemPointerRecord*)itr.current(); |
419 MemPointerRecord* next = (MemPointerRecord*)itr.next(); | |
420 while (next != NULL) { | |
421 assert((next->addr() > cur->addr()) || | |
422 ((next->flags() & MemPointerRecord::tag_masks) > | |
423 (cur->flags() & MemPointerRecord::tag_masks)), | |
424 "sorting order"); | |
425 cur = next; | |
426 next = (MemPointerRecord*)itr.next(); | |
427 } | |
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428 |
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429 MemPointerArrayIteratorImpl vm_itr(_staging_area.vm_data()); |
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430 cur = (MemPointerRecord*)vm_itr.current(); |
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431 while (cur != NULL) { |
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432 assert(cur->is_vm_pointer(), "virtual memory pointer only"); |
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433 cur = (MemPointerRecord*)vm_itr.next(); |
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434 } |
6197 | 435 } |
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436 #endif // ASSERT |
6197 | 437 |