Mercurial > hg > truffle
annotate src/share/vm/memory/heapInspection.cpp @ 2426:1d1603768966
7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
Summary: Update the copyright to be 2010 on all changed files in OpenJDK
Reviewed-by: ohair
| author | trims |
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| date | Tue, 05 Apr 2011 14:12:31 -0700 |
| parents | 3582bf76420e |
| children | d2a62e0f25eb |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 2002, 2011, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "gc_interface/collectedHeap.hpp" | |
| 27 #include "memory/genCollectedHeap.hpp" | |
| 28 #include "memory/heapInspection.hpp" | |
| 29 #include "memory/resourceArea.hpp" | |
| 30 #include "oops/klassOop.hpp" | |
| 31 #include "runtime/os.hpp" | |
| 32 #include "utilities/globalDefinitions.hpp" | |
| 33 #ifndef SERIALGC | |
| 34 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" | |
| 35 #endif | |
| 0 | 36 |
| 37 // HeapInspection | |
| 38 | |
| 39 int KlassInfoEntry::compare(KlassInfoEntry* e1, KlassInfoEntry* e2) { | |
| 40 if(e1->_instance_words > e2->_instance_words) { | |
| 41 return -1; | |
| 42 } else if(e1->_instance_words < e2->_instance_words) { | |
| 43 return 1; | |
| 44 } | |
| 45 return 0; | |
| 46 } | |
| 47 | |
| 48 void KlassInfoEntry::print_on(outputStream* st) const { | |
| 49 ResourceMark rm; | |
| 50 const char* name;; | |
| 51 if (_klass->klass_part()->name() != NULL) { | |
| 52 name = _klass->klass_part()->external_name(); | |
| 53 } else { | |
| 54 if (_klass == Universe::klassKlassObj()) name = "<klassKlass>"; else | |
| 55 if (_klass == Universe::arrayKlassKlassObj()) name = "<arrayKlassKlass>"; else | |
| 56 if (_klass == Universe::objArrayKlassKlassObj()) name = "<objArrayKlassKlass>"; else | |
| 57 if (_klass == Universe::instanceKlassKlassObj()) name = "<instanceKlassKlass>"; else | |
| 58 if (_klass == Universe::typeArrayKlassKlassObj()) name = "<typeArrayKlassKlass>"; else | |
| 59 if (_klass == Universe::boolArrayKlassObj()) name = "<boolArrayKlass>"; else | |
| 60 if (_klass == Universe::charArrayKlassObj()) name = "<charArrayKlass>"; else | |
| 61 if (_klass == Universe::singleArrayKlassObj()) name = "<singleArrayKlass>"; else | |
| 62 if (_klass == Universe::doubleArrayKlassObj()) name = "<doubleArrayKlass>"; else | |
| 63 if (_klass == Universe::byteArrayKlassObj()) name = "<byteArrayKlass>"; else | |
| 64 if (_klass == Universe::shortArrayKlassObj()) name = "<shortArrayKlass>"; else | |
| 65 if (_klass == Universe::intArrayKlassObj()) name = "<intArrayKlass>"; else | |
| 66 if (_klass == Universe::longArrayKlassObj()) name = "<longArrayKlass>"; else | |
| 67 if (_klass == Universe::methodKlassObj()) name = "<methodKlass>"; else | |
| 68 if (_klass == Universe::constMethodKlassObj()) name = "<constMethodKlass>"; else | |
| 69 if (_klass == Universe::methodDataKlassObj()) name = "<methodDataKlass>"; else | |
| 70 if (_klass == Universe::constantPoolKlassObj()) name = "<constantPoolKlass>"; else | |
| 71 if (_klass == Universe::constantPoolCacheKlassObj()) name = "<constantPoolCacheKlass>"; else | |
| 72 if (_klass == Universe::compiledICHolderKlassObj()) name = "<compiledICHolderKlass>"; else | |
| 73 name = "<no name>"; | |
| 74 } | |
| 75 // simplify the formatting (ILP32 vs LP64) - always cast the numbers to 64-bit | |
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76 st->print_cr(INT64_FORMAT_W(13) " " UINT64_FORMAT_W(13) " %s", |
| 0 | 77 (jlong) _instance_count, |
| 78 (julong) _instance_words * HeapWordSize, | |
| 79 name); | |
| 80 } | |
| 81 | |
| 82 KlassInfoEntry* KlassInfoBucket::lookup(const klassOop k) { | |
| 83 KlassInfoEntry* elt = _list; | |
| 84 while (elt != NULL) { | |
| 85 if (elt->is_equal(k)) { | |
| 86 return elt; | |
| 87 } | |
| 88 elt = elt->next(); | |
| 89 } | |
| 90 elt = new KlassInfoEntry(k, list()); | |
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91 // We may be out of space to allocate the new entry. |
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92 if (elt != NULL) { |
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93 set_list(elt); |
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94 } |
| 0 | 95 return elt; |
| 96 } | |
| 97 | |
| 98 void KlassInfoBucket::iterate(KlassInfoClosure* cic) { | |
| 99 KlassInfoEntry* elt = _list; | |
| 100 while (elt != NULL) { | |
| 101 cic->do_cinfo(elt); | |
| 102 elt = elt->next(); | |
| 103 } | |
| 104 } | |
| 105 | |
| 106 void KlassInfoBucket::empty() { | |
| 107 KlassInfoEntry* elt = _list; | |
| 108 _list = NULL; | |
| 109 while (elt != NULL) { | |
| 110 KlassInfoEntry* next = elt->next(); | |
| 111 delete elt; | |
| 112 elt = next; | |
| 113 } | |
| 114 } | |
| 115 | |
| 116 KlassInfoTable::KlassInfoTable(int size, HeapWord* ref) { | |
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117 _size = 0; |
| 0 | 118 _ref = ref; |
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119 _buckets = NEW_C_HEAP_ARRAY(KlassInfoBucket, size); |
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120 if (_buckets != NULL) { |
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121 _size = size; |
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122 for (int index = 0; index < _size; index++) { |
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123 _buckets[index].initialize(); |
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124 } |
| 0 | 125 } |
| 126 } | |
| 127 | |
| 128 KlassInfoTable::~KlassInfoTable() { | |
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129 if (_buckets != NULL) { |
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130 for (int index = 0; index < _size; index++) { |
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131 _buckets[index].empty(); |
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132 } |
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133 FREE_C_HEAP_ARRAY(KlassInfoBucket, _buckets); |
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134 _size = 0; |
| 0 | 135 } |
| 136 } | |
| 137 | |
| 138 uint KlassInfoTable::hash(klassOop p) { | |
| 139 assert(Universe::heap()->is_in_permanent((HeapWord*)p), "all klasses in permgen"); | |
| 140 return (uint)(((uintptr_t)p - (uintptr_t)_ref) >> 2); | |
| 141 } | |
| 142 | |
| 143 KlassInfoEntry* KlassInfoTable::lookup(const klassOop k) { | |
| 144 uint idx = hash(k) % _size; | |
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145 assert(_buckets != NULL, "Allocation failure should have been caught"); |
| 0 | 146 KlassInfoEntry* e = _buckets[idx].lookup(k); |
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147 // Lookup may fail if this is a new klass for which we |
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148 // could not allocate space for an new entry. |
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149 assert(e == NULL || k == e->klass(), "must be equal"); |
| 0 | 150 return e; |
| 151 } | |
| 152 | |
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153 // Return false if the entry could not be recorded on account |
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154 // of running out of space required to create a new entry. |
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155 bool KlassInfoTable::record_instance(const oop obj) { |
| 0 | 156 klassOop k = obj->klass(); |
| 157 KlassInfoEntry* elt = lookup(k); | |
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158 // elt may be NULL if it's a new klass for which we |
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159 // could not allocate space for a new entry in the hashtable. |
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160 if (elt != NULL) { |
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161 elt->set_count(elt->count() + 1); |
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162 elt->set_words(elt->words() + obj->size()); |
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163 return true; |
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164 } else { |
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165 return false; |
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166 } |
| 0 | 167 } |
| 168 | |
| 169 void KlassInfoTable::iterate(KlassInfoClosure* cic) { | |
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170 assert(_size == 0 || _buckets != NULL, "Allocation failure should have been caught"); |
| 0 | 171 for (int index = 0; index < _size; index++) { |
| 172 _buckets[index].iterate(cic); | |
| 173 } | |
| 174 } | |
| 175 | |
| 176 int KlassInfoHisto::sort_helper(KlassInfoEntry** e1, KlassInfoEntry** e2) { | |
| 177 return (*e1)->compare(*e1,*e2); | |
| 178 } | |
| 179 | |
| 180 KlassInfoHisto::KlassInfoHisto(const char* title, int estimatedCount) : | |
| 181 _title(title) { | |
| 182 _elements = new (ResourceObj::C_HEAP) GrowableArray<KlassInfoEntry*>(estimatedCount,true); | |
| 183 } | |
| 184 | |
| 185 KlassInfoHisto::~KlassInfoHisto() { | |
| 186 delete _elements; | |
| 187 } | |
| 188 | |
| 189 void KlassInfoHisto::add(KlassInfoEntry* cie) { | |
| 190 elements()->append(cie); | |
| 191 } | |
| 192 | |
| 193 void KlassInfoHisto::sort() { | |
| 194 elements()->sort(KlassInfoHisto::sort_helper); | |
| 195 } | |
| 196 | |
| 197 void KlassInfoHisto::print_elements(outputStream* st) const { | |
| 198 // simplify the formatting (ILP32 vs LP64) - store the sum in 64-bit | |
| 199 jlong total = 0; | |
| 200 julong totalw = 0; | |
| 201 for(int i=0; i < elements()->length(); i++) { | |
| 202 st->print("%4d: ", i+1); | |
| 203 elements()->at(i)->print_on(st); | |
| 204 total += elements()->at(i)->count(); | |
| 205 totalw += elements()->at(i)->words(); | |
| 206 } | |
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207 st->print_cr("Total " INT64_FORMAT_W(13) " " UINT64_FORMAT_W(13), |
| 0 | 208 total, totalw * HeapWordSize); |
| 209 } | |
| 210 | |
| 211 void KlassInfoHisto::print_on(outputStream* st) const { | |
| 212 st->print_cr("%s",title()); | |
| 213 print_elements(st); | |
| 214 } | |
| 215 | |
| 216 class HistoClosure : public KlassInfoClosure { | |
| 217 private: | |
| 218 KlassInfoHisto* _cih; | |
| 219 public: | |
| 220 HistoClosure(KlassInfoHisto* cih) : _cih(cih) {} | |
| 221 | |
| 222 void do_cinfo(KlassInfoEntry* cie) { | |
| 223 _cih->add(cie); | |
| 224 } | |
| 225 }; | |
| 226 | |
| 227 class RecordInstanceClosure : public ObjectClosure { | |
| 228 private: | |
| 229 KlassInfoTable* _cit; | |
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230 size_t _missed_count; |
| 0 | 231 public: |
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232 RecordInstanceClosure(KlassInfoTable* cit) : |
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233 _cit(cit), _missed_count(0) {} |
| 0 | 234 |
| 235 void do_object(oop obj) { | |
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236 if (!_cit->record_instance(obj)) { |
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237 _missed_count++; |
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238 } |
| 0 | 239 } |
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240 |
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241 size_t missed_count() { return _missed_count; } |
| 0 | 242 }; |
| 243 | |
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244 void HeapInspection::heap_inspection(outputStream* st, bool need_prologue) { |
| 0 | 245 ResourceMark rm; |
| 246 HeapWord* ref; | |
| 247 | |
| 248 CollectedHeap* heap = Universe::heap(); | |
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249 bool is_shared_heap = false; |
| 0 | 250 switch (heap->kind()) { |
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251 case CollectedHeap::G1CollectedHeap: |
| 0 | 252 case CollectedHeap::GenCollectedHeap: { |
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253 is_shared_heap = true; |
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254 SharedHeap* sh = (SharedHeap*)heap; |
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255 if (need_prologue) { |
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256 sh->gc_prologue(false /* !full */); // get any necessary locks, etc. |
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257 } |
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258 ref = sh->perm_gen()->used_region().start(); |
| 0 | 259 break; |
| 260 } | |
| 261 #ifndef SERIALGC | |
| 262 case CollectedHeap::ParallelScavengeHeap: { | |
| 263 ParallelScavengeHeap* psh = (ParallelScavengeHeap*)heap; | |
| 264 ref = psh->perm_gen()->object_space()->used_region().start(); | |
| 265 break; | |
| 266 } | |
| 267 #endif // SERIALGC | |
| 268 default: | |
| 269 ShouldNotReachHere(); // Unexpected heap kind for this op | |
| 270 } | |
| 271 // Collect klass instance info | |
| 272 KlassInfoTable cit(KlassInfoTable::cit_size, ref); | |
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273 if (!cit.allocation_failed()) { |
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274 // Iterate over objects in the heap |
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275 RecordInstanceClosure ric(&cit); |
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276 // If this operation encounters a bad object when using CMS, |
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277 // consider using safe_object_iterate() which avoids perm gen |
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278 // objects that may contain bad references. |
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279 Universe::heap()->object_iterate(&ric); |
| 0 | 280 |
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281 // Report if certain classes are not counted because of |
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282 // running out of C-heap for the histogram. |
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283 size_t missed_count = ric.missed_count(); |
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284 if (missed_count != 0) { |
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285 st->print_cr("WARNING: Ran out of C-heap; undercounted " SIZE_FORMAT |
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286 " total instances in data below", |
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287 missed_count); |
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288 } |
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289 // Sort and print klass instance info |
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290 KlassInfoHisto histo("\n" |
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291 " num #instances #bytes class name\n" |
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292 "----------------------------------------------", |
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293 KlassInfoHisto::histo_initial_size); |
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294 HistoClosure hc(&histo); |
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295 cit.iterate(&hc); |
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296 histo.sort(); |
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297 histo.print_on(st); |
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298 } else { |
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299 st->print_cr("WARNING: Ran out of C-heap; histogram not generated"); |
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300 } |
| 0 | 301 st->flush(); |
| 302 | |
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303 if (need_prologue && is_shared_heap) { |
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304 SharedHeap* sh = (SharedHeap*)heap; |
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305 sh->gc_epilogue(false /* !full */); // release all acquired locks, etc. |
| 0 | 306 } |
| 307 } | |
| 308 | |
| 309 class FindInstanceClosure : public ObjectClosure { | |
| 310 private: | |
| 311 klassOop _klass; | |
| 312 GrowableArray<oop>* _result; | |
| 313 | |
| 314 public: | |
| 315 FindInstanceClosure(klassOop k, GrowableArray<oop>* result) : _klass(k), _result(result) {}; | |
| 316 | |
| 317 void do_object(oop obj) { | |
| 318 if (obj->is_a(_klass)) { | |
| 319 _result->append(obj); | |
| 320 } | |
| 321 } | |
| 322 }; | |
| 323 | |
| 324 void HeapInspection::find_instances_at_safepoint(klassOop k, GrowableArray<oop>* result) { | |
| 325 assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped"); | |
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326 assert(Heap_lock->is_locked(), "should have the Heap_lock"); |
| 0 | 327 |
| 328 // Ensure that the heap is parsable | |
| 329 Universe::heap()->ensure_parsability(false); // no need to retire TALBs | |
| 330 | |
| 331 // Iterate over objects in the heap | |
| 332 FindInstanceClosure fic(k, result); | |
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333 // If this operation encounters a bad object when using CMS, |
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334 // consider using safe_object_iterate() which avoids perm gen |
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335 // objects that may contain bad references. |
| 0 | 336 Universe::heap()->object_iterate(&fic); |
| 337 } |