Mercurial > hg > truffle
annotate src/share/vm/memory/heapInspection.cpp @ 7403:807f1d348f7b
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author | collins |
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date | Fri, 14 Dec 2012 11:45:55 -0800 |
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0 | 1 /* |
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2 * Copyright (c) 2002, 2012, 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 "runtime/os.hpp" | |
31 #include "utilities/globalDefinitions.hpp" | |
32 #ifndef SERIALGC | |
33 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" | |
34 #endif | |
0 | 35 |
36 // HeapInspection | |
37 | |
38 int KlassInfoEntry::compare(KlassInfoEntry* e1, KlassInfoEntry* e2) { | |
39 if(e1->_instance_words > e2->_instance_words) { | |
40 return -1; | |
41 } else if(e1->_instance_words < e2->_instance_words) { | |
42 return 1; | |
43 } | |
44 return 0; | |
45 } | |
46 | |
47 void KlassInfoEntry::print_on(outputStream* st) const { | |
48 ResourceMark rm; | |
49 const char* name;; | |
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50 if (_klass->name() != NULL) { |
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51 name = _klass->external_name(); |
0 | 52 } else { |
53 if (_klass == Universe::boolArrayKlassObj()) name = "<boolArrayKlass>"; else | |
54 if (_klass == Universe::charArrayKlassObj()) name = "<charArrayKlass>"; else | |
55 if (_klass == Universe::singleArrayKlassObj()) name = "<singleArrayKlass>"; else | |
56 if (_klass == Universe::doubleArrayKlassObj()) name = "<doubleArrayKlass>"; else | |
57 if (_klass == Universe::byteArrayKlassObj()) name = "<byteArrayKlass>"; else | |
58 if (_klass == Universe::shortArrayKlassObj()) name = "<shortArrayKlass>"; else | |
59 if (_klass == Universe::intArrayKlassObj()) name = "<intArrayKlass>"; else | |
60 if (_klass == Universe::longArrayKlassObj()) name = "<longArrayKlass>"; else | |
61 name = "<no name>"; | |
62 } | |
63 // simplify the formatting (ILP32 vs LP64) - always cast the numbers to 64-bit | |
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64 st->print_cr(INT64_FORMAT_W(13) " " UINT64_FORMAT_W(13) " %s", |
0 | 65 (jlong) _instance_count, |
66 (julong) _instance_words * HeapWordSize, | |
67 name); | |
68 } | |
69 | |
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70 KlassInfoEntry* KlassInfoBucket::lookup(Klass* const k) { |
0 | 71 KlassInfoEntry* elt = _list; |
72 while (elt != NULL) { | |
73 if (elt->is_equal(k)) { | |
74 return elt; | |
75 } | |
76 elt = elt->next(); | |
77 } | |
78 elt = new KlassInfoEntry(k, list()); | |
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79 // We may be out of space to allocate the new entry. |
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80 if (elt != NULL) { |
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81 set_list(elt); |
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82 } |
0 | 83 return elt; |
84 } | |
85 | |
86 void KlassInfoBucket::iterate(KlassInfoClosure* cic) { | |
87 KlassInfoEntry* elt = _list; | |
88 while (elt != NULL) { | |
89 cic->do_cinfo(elt); | |
90 elt = elt->next(); | |
91 } | |
92 } | |
93 | |
94 void KlassInfoBucket::empty() { | |
95 KlassInfoEntry* elt = _list; | |
96 _list = NULL; | |
97 while (elt != NULL) { | |
98 KlassInfoEntry* next = elt->next(); | |
99 delete elt; | |
100 elt = next; | |
101 } | |
102 } | |
103 | |
104 KlassInfoTable::KlassInfoTable(int size, HeapWord* ref) { | |
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105 _size = 0; |
0 | 106 _ref = ref; |
6197 | 107 _buckets = NEW_C_HEAP_ARRAY(KlassInfoBucket, size, mtInternal); |
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108 if (_buckets != NULL) { |
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109 _size = size; |
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110 for (int index = 0; index < _size; index++) { |
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111 _buckets[index].initialize(); |
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112 } |
0 | 113 } |
114 } | |
115 | |
116 KlassInfoTable::~KlassInfoTable() { | |
11
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117 if (_buckets != NULL) { |
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118 for (int index = 0; index < _size; index++) { |
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119 _buckets[index].empty(); |
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120 } |
6197 | 121 FREE_C_HEAP_ARRAY(KlassInfoBucket, _buckets, mtInternal); |
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122 _size = 0; |
0 | 123 } |
124 } | |
125 | |
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126 uint KlassInfoTable::hash(Klass* p) { |
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127 assert(p->is_metadata(), "all klasses are metadata"); |
0 | 128 return (uint)(((uintptr_t)p - (uintptr_t)_ref) >> 2); |
129 } | |
130 | |
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131 KlassInfoEntry* KlassInfoTable::lookup(Klass* const k) { |
0 | 132 uint idx = hash(k) % _size; |
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133 assert(_buckets != NULL, "Allocation failure should have been caught"); |
0 | 134 KlassInfoEntry* e = _buckets[idx].lookup(k); |
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135 // Lookup may fail if this is a new klass for which we |
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136 // could not allocate space for an new entry. |
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137 assert(e == NULL || k == e->klass(), "must be equal"); |
0 | 138 return e; |
139 } | |
140 | |
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141 // Return false if the entry could not be recorded on account |
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142 // of running out of space required to create a new entry. |
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143 bool KlassInfoTable::record_instance(const oop obj) { |
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144 Klass* k = obj->klass(); |
0 | 145 KlassInfoEntry* elt = lookup(k); |
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146 // elt may be NULL if it's a new klass for which we |
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147 // could not allocate space for a new entry in the hashtable. |
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148 if (elt != NULL) { |
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149 elt->set_count(elt->count() + 1); |
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150 elt->set_words(elt->words() + obj->size()); |
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151 return true; |
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152 } else { |
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153 return false; |
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154 } |
0 | 155 } |
156 | |
157 void KlassInfoTable::iterate(KlassInfoClosure* cic) { | |
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158 assert(_size == 0 || _buckets != NULL, "Allocation failure should have been caught"); |
0 | 159 for (int index = 0; index < _size; index++) { |
160 _buckets[index].iterate(cic); | |
161 } | |
162 } | |
163 | |
164 int KlassInfoHisto::sort_helper(KlassInfoEntry** e1, KlassInfoEntry** e2) { | |
165 return (*e1)->compare(*e1,*e2); | |
166 } | |
167 | |
168 KlassInfoHisto::KlassInfoHisto(const char* title, int estimatedCount) : | |
169 _title(title) { | |
6197 | 170 _elements = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<KlassInfoEntry*>(estimatedCount,true); |
0 | 171 } |
172 | |
173 KlassInfoHisto::~KlassInfoHisto() { | |
174 delete _elements; | |
175 } | |
176 | |
177 void KlassInfoHisto::add(KlassInfoEntry* cie) { | |
178 elements()->append(cie); | |
179 } | |
180 | |
181 void KlassInfoHisto::sort() { | |
182 elements()->sort(KlassInfoHisto::sort_helper); | |
183 } | |
184 | |
185 void KlassInfoHisto::print_elements(outputStream* st) const { | |
186 // simplify the formatting (ILP32 vs LP64) - store the sum in 64-bit | |
187 jlong total = 0; | |
188 julong totalw = 0; | |
189 for(int i=0; i < elements()->length(); i++) { | |
190 st->print("%4d: ", i+1); | |
191 elements()->at(i)->print_on(st); | |
192 total += elements()->at(i)->count(); | |
193 totalw += elements()->at(i)->words(); | |
194 } | |
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195 st->print_cr("Total " INT64_FORMAT_W(13) " " UINT64_FORMAT_W(13), |
0 | 196 total, totalw * HeapWordSize); |
197 } | |
198 | |
199 void KlassInfoHisto::print_on(outputStream* st) const { | |
200 st->print_cr("%s",title()); | |
201 print_elements(st); | |
202 } | |
203 | |
204 class HistoClosure : public KlassInfoClosure { | |
205 private: | |
206 KlassInfoHisto* _cih; | |
207 public: | |
208 HistoClosure(KlassInfoHisto* cih) : _cih(cih) {} | |
209 | |
210 void do_cinfo(KlassInfoEntry* cie) { | |
211 _cih->add(cie); | |
212 } | |
213 }; | |
214 | |
215 class RecordInstanceClosure : public ObjectClosure { | |
216 private: | |
217 KlassInfoTable* _cit; | |
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218 size_t _missed_count; |
0 | 219 public: |
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220 RecordInstanceClosure(KlassInfoTable* cit) : |
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221 _cit(cit), _missed_count(0) {} |
0 | 222 |
223 void do_object(oop obj) { | |
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224 if (!_cit->record_instance(obj)) { |
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225 _missed_count++; |
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226 } |
0 | 227 } |
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228 |
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229 size_t missed_count() { return _missed_count; } |
0 | 230 }; |
231 | |
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232 void HeapInspection::heap_inspection(outputStream* st, bool need_prologue) { |
0 | 233 ResourceMark rm; |
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234 // Get some random number for ref (the hash key) |
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235 HeapWord* ref = (HeapWord*) Universe::boolArrayKlassObj(); |
0 | 236 CollectedHeap* heap = Universe::heap(); |
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237 bool is_shared_heap = false; |
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238 |
0 | 239 // Collect klass instance info |
240 KlassInfoTable cit(KlassInfoTable::cit_size, ref); | |
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241 if (!cit.allocation_failed()) { |
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242 // Iterate over objects in the heap |
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243 RecordInstanceClosure ric(&cit); |
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244 Universe::heap()->object_iterate(&ric); |
0 | 245 |
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246 // Report if certain classes are not counted because of |
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247 // running out of C-heap for the histogram. |
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248 size_t missed_count = ric.missed_count(); |
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249 if (missed_count != 0) { |
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250 st->print_cr("WARNING: Ran out of C-heap; undercounted " SIZE_FORMAT |
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251 " total instances in data below", |
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252 missed_count); |
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253 } |
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254 // Sort and print klass instance info |
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255 KlassInfoHisto histo("\n" |
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256 " num #instances #bytes class name\n" |
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257 "----------------------------------------------", |
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258 KlassInfoHisto::histo_initial_size); |
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259 HistoClosure hc(&histo); |
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260 cit.iterate(&hc); |
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261 histo.sort(); |
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262 histo.print_on(st); |
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263 } else { |
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264 st->print_cr("WARNING: Ran out of C-heap; histogram not generated"); |
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265 } |
0 | 266 st->flush(); |
267 | |
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268 if (need_prologue && is_shared_heap) { |
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269 SharedHeap* sh = (SharedHeap*)heap; |
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270 sh->gc_epilogue(false /* !full */); // release all acquired locks, etc. |
0 | 271 } |
272 } | |
273 | |
274 class FindInstanceClosure : public ObjectClosure { | |
275 private: | |
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6964458: Reimplement class meta-data storage to use native memory
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276 Klass* _klass; |
0 | 277 GrowableArray<oop>* _result; |
278 | |
279 public: | |
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280 FindInstanceClosure(Klass* k, GrowableArray<oop>* result) : _klass(k), _result(result) {}; |
0 | 281 |
282 void do_object(oop obj) { | |
283 if (obj->is_a(_klass)) { | |
284 _result->append(obj); | |
285 } | |
286 } | |
287 }; | |
288 | |
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289 void HeapInspection::find_instances_at_safepoint(Klass* k, GrowableArray<oop>* result) { |
0 | 290 assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped"); |
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cff162798819
6888953: some calls to function-like macros are missing semicolons
jcoomes
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291 assert(Heap_lock->is_locked(), "should have the Heap_lock"); |
0 | 292 |
293 // Ensure that the heap is parsable | |
294 Universe::heap()->ensure_parsability(false); // no need to retire TALBs | |
295 | |
296 // Iterate over objects in the heap | |
297 FindInstanceClosure fic(k, result); | |
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6689653: JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
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298 // If this operation encounters a bad object when using CMS, |
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299 // consider using safe_object_iterate() which avoids metadata |
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300 // objects that may contain bad references. |
0 | 301 Universe::heap()->object_iterate(&fic); |
302 } |