Mercurial > hg > truffle
annotate src/share/vm/memory/heapInspection.cpp @ 1685:0e35fa8ebccd
6973963: SEGV in ciBlock::start_bci() with EA
Summary: Added more checks into ResourceObj and growableArray to verify correctness of allocation type.
Reviewed-by: never, coleenp, dholmes
author | kvn |
---|---|
date | Tue, 03 Aug 2010 15:55:03 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2002, 2009, 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 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_heapInspection.cpp.incl" | |
27 | |
28 // HeapInspection | |
29 | |
30 int KlassInfoEntry::compare(KlassInfoEntry* e1, KlassInfoEntry* e2) { | |
31 if(e1->_instance_words > e2->_instance_words) { | |
32 return -1; | |
33 } else if(e1->_instance_words < e2->_instance_words) { | |
34 return 1; | |
35 } | |
36 return 0; | |
37 } | |
38 | |
39 void KlassInfoEntry::print_on(outputStream* st) const { | |
40 ResourceMark rm; | |
41 const char* name;; | |
42 if (_klass->klass_part()->name() != NULL) { | |
43 name = _klass->klass_part()->external_name(); | |
44 } else { | |
45 if (_klass == Universe::klassKlassObj()) name = "<klassKlass>"; else | |
46 if (_klass == Universe::arrayKlassKlassObj()) name = "<arrayKlassKlass>"; else | |
47 if (_klass == Universe::objArrayKlassKlassObj()) name = "<objArrayKlassKlass>"; else | |
48 if (_klass == Universe::instanceKlassKlassObj()) name = "<instanceKlassKlass>"; else | |
49 if (_klass == Universe::typeArrayKlassKlassObj()) name = "<typeArrayKlassKlass>"; else | |
50 if (_klass == Universe::symbolKlassObj()) name = "<symbolKlass>"; else | |
51 if (_klass == Universe::boolArrayKlassObj()) name = "<boolArrayKlass>"; else | |
52 if (_klass == Universe::charArrayKlassObj()) name = "<charArrayKlass>"; else | |
53 if (_klass == Universe::singleArrayKlassObj()) name = "<singleArrayKlass>"; else | |
54 if (_klass == Universe::doubleArrayKlassObj()) name = "<doubleArrayKlass>"; else | |
55 if (_klass == Universe::byteArrayKlassObj()) name = "<byteArrayKlass>"; else | |
56 if (_klass == Universe::shortArrayKlassObj()) name = "<shortArrayKlass>"; else | |
57 if (_klass == Universe::intArrayKlassObj()) name = "<intArrayKlass>"; else | |
58 if (_klass == Universe::longArrayKlassObj()) name = "<longArrayKlass>"; else | |
59 if (_klass == Universe::methodKlassObj()) name = "<methodKlass>"; else | |
60 if (_klass == Universe::constMethodKlassObj()) name = "<constMethodKlass>"; else | |
61 if (_klass == Universe::methodDataKlassObj()) name = "<methodDataKlass>"; else | |
62 if (_klass == Universe::constantPoolKlassObj()) name = "<constantPoolKlass>"; else | |
63 if (_klass == Universe::constantPoolCacheKlassObj()) name = "<constantPoolCacheKlass>"; else | |
64 if (_klass == Universe::compiledICHolderKlassObj()) name = "<compiledICHolderKlass>"; else | |
65 name = "<no name>"; | |
66 } | |
67 // simplify the formatting (ILP32 vs LP64) - always cast the numbers to 64-bit | |
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68 st->print_cr(INT64_FORMAT_W(13) " " UINT64_FORMAT_W(13) " %s", |
0 | 69 (jlong) _instance_count, |
70 (julong) _instance_words * HeapWordSize, | |
71 name); | |
72 } | |
73 | |
74 KlassInfoEntry* KlassInfoBucket::lookup(const klassOop k) { | |
75 KlassInfoEntry* elt = _list; | |
76 while (elt != NULL) { | |
77 if (elt->is_equal(k)) { | |
78 return elt; | |
79 } | |
80 elt = elt->next(); | |
81 } | |
82 elt = new KlassInfoEntry(k, list()); | |
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83 // We may be out of space to allocate the new entry. |
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84 if (elt != NULL) { |
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85 set_list(elt); |
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86 } |
0 | 87 return elt; |
88 } | |
89 | |
90 void KlassInfoBucket::iterate(KlassInfoClosure* cic) { | |
91 KlassInfoEntry* elt = _list; | |
92 while (elt != NULL) { | |
93 cic->do_cinfo(elt); | |
94 elt = elt->next(); | |
95 } | |
96 } | |
97 | |
98 void KlassInfoBucket::empty() { | |
99 KlassInfoEntry* elt = _list; | |
100 _list = NULL; | |
101 while (elt != NULL) { | |
102 KlassInfoEntry* next = elt->next(); | |
103 delete elt; | |
104 elt = next; | |
105 } | |
106 } | |
107 | |
108 KlassInfoTable::KlassInfoTable(int size, HeapWord* ref) { | |
11
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109 _size = 0; |
0 | 110 _ref = ref; |
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111 _buckets = NEW_C_HEAP_ARRAY(KlassInfoBucket, size); |
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112 if (_buckets != NULL) { |
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113 _size = size; |
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114 for (int index = 0; index < _size; index++) { |
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115 _buckets[index].initialize(); |
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116 } |
0 | 117 } |
118 } | |
119 | |
120 KlassInfoTable::~KlassInfoTable() { | |
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121 if (_buckets != NULL) { |
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122 for (int index = 0; index < _size; index++) { |
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123 _buckets[index].empty(); |
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124 } |
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125 FREE_C_HEAP_ARRAY(KlassInfoBucket, _buckets); |
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126 _size = 0; |
0 | 127 } |
128 } | |
129 | |
130 uint KlassInfoTable::hash(klassOop p) { | |
131 assert(Universe::heap()->is_in_permanent((HeapWord*)p), "all klasses in permgen"); | |
132 return (uint)(((uintptr_t)p - (uintptr_t)_ref) >> 2); | |
133 } | |
134 | |
135 KlassInfoEntry* KlassInfoTable::lookup(const klassOop k) { | |
136 uint idx = hash(k) % _size; | |
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137 assert(_buckets != NULL, "Allocation failure should have been caught"); |
0 | 138 KlassInfoEntry* e = _buckets[idx].lookup(k); |
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139 // Lookup may fail if this is a new klass for which we |
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140 // could not allocate space for an new entry. |
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141 assert(e == NULL || k == e->klass(), "must be equal"); |
0 | 142 return e; |
143 } | |
144 | |
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145 // Return false if the entry could not be recorded on account |
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146 // of running out of space required to create a new entry. |
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147 bool KlassInfoTable::record_instance(const oop obj) { |
0 | 148 klassOop k = obj->klass(); |
149 KlassInfoEntry* elt = lookup(k); | |
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150 // elt may be NULL if it's a new klass for which we |
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151 // could not allocate space for a new entry in the hashtable. |
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152 if (elt != NULL) { |
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153 elt->set_count(elt->count() + 1); |
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154 elt->set_words(elt->words() + obj->size()); |
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155 return true; |
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156 } else { |
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157 return false; |
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158 } |
0 | 159 } |
160 | |
161 void KlassInfoTable::iterate(KlassInfoClosure* cic) { | |
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162 assert(_size == 0 || _buckets != NULL, "Allocation failure should have been caught"); |
0 | 163 for (int index = 0; index < _size; index++) { |
164 _buckets[index].iterate(cic); | |
165 } | |
166 } | |
167 | |
168 int KlassInfoHisto::sort_helper(KlassInfoEntry** e1, KlassInfoEntry** e2) { | |
169 return (*e1)->compare(*e1,*e2); | |
170 } | |
171 | |
172 KlassInfoHisto::KlassInfoHisto(const char* title, int estimatedCount) : | |
173 _title(title) { | |
174 _elements = new (ResourceObj::C_HEAP) GrowableArray<KlassInfoEntry*>(estimatedCount,true); | |
175 } | |
176 | |
177 KlassInfoHisto::~KlassInfoHisto() { | |
178 delete _elements; | |
179 } | |
180 | |
181 void KlassInfoHisto::add(KlassInfoEntry* cie) { | |
182 elements()->append(cie); | |
183 } | |
184 | |
185 void KlassInfoHisto::sort() { | |
186 elements()->sort(KlassInfoHisto::sort_helper); | |
187 } | |
188 | |
189 void KlassInfoHisto::print_elements(outputStream* st) const { | |
190 // simplify the formatting (ILP32 vs LP64) - store the sum in 64-bit | |
191 jlong total = 0; | |
192 julong totalw = 0; | |
193 for(int i=0; i < elements()->length(); i++) { | |
194 st->print("%4d: ", i+1); | |
195 elements()->at(i)->print_on(st); | |
196 total += elements()->at(i)->count(); | |
197 totalw += elements()->at(i)->words(); | |
198 } | |
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199 st->print_cr("Total " INT64_FORMAT_W(13) " " UINT64_FORMAT_W(13), |
0 | 200 total, totalw * HeapWordSize); |
201 } | |
202 | |
203 void KlassInfoHisto::print_on(outputStream* st) const { | |
204 st->print_cr("%s",title()); | |
205 print_elements(st); | |
206 } | |
207 | |
208 class HistoClosure : public KlassInfoClosure { | |
209 private: | |
210 KlassInfoHisto* _cih; | |
211 public: | |
212 HistoClosure(KlassInfoHisto* cih) : _cih(cih) {} | |
213 | |
214 void do_cinfo(KlassInfoEntry* cie) { | |
215 _cih->add(cie); | |
216 } | |
217 }; | |
218 | |
219 class RecordInstanceClosure : public ObjectClosure { | |
220 private: | |
221 KlassInfoTable* _cit; | |
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222 size_t _missed_count; |
0 | 223 public: |
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224 RecordInstanceClosure(KlassInfoTable* cit) : |
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225 _cit(cit), _missed_count(0) {} |
0 | 226 |
227 void do_object(oop obj) { | |
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228 if (!_cit->record_instance(obj)) { |
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229 _missed_count++; |
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230 } |
0 | 231 } |
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232 |
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233 size_t missed_count() { return _missed_count; } |
0 | 234 }; |
235 | |
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236 void HeapInspection::heap_inspection(outputStream* st, bool need_prologue) { |
0 | 237 ResourceMark rm; |
238 HeapWord* ref; | |
239 | |
240 CollectedHeap* heap = Universe::heap(); | |
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241 bool is_shared_heap = false; |
0 | 242 switch (heap->kind()) { |
342
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243 case CollectedHeap::G1CollectedHeap: |
0 | 244 case CollectedHeap::GenCollectedHeap: { |
342
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245 is_shared_heap = true; |
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246 SharedHeap* sh = (SharedHeap*)heap; |
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247 if (need_prologue) { |
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248 sh->gc_prologue(false /* !full */); // get any necessary locks, etc. |
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249 } |
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250 ref = sh->perm_gen()->used_region().start(); |
0 | 251 break; |
252 } | |
253 #ifndef SERIALGC | |
254 case CollectedHeap::ParallelScavengeHeap: { | |
255 ParallelScavengeHeap* psh = (ParallelScavengeHeap*)heap; | |
256 ref = psh->perm_gen()->object_space()->used_region().start(); | |
257 break; | |
258 } | |
259 #endif // SERIALGC | |
260 default: | |
261 ShouldNotReachHere(); // Unexpected heap kind for this op | |
262 } | |
263 // Collect klass instance info | |
264 KlassInfoTable cit(KlassInfoTable::cit_size, ref); | |
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265 if (!cit.allocation_failed()) { |
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266 // Iterate over objects in the heap |
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267 RecordInstanceClosure ric(&cit); |
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268 // If this operation encounters a bad object when using CMS, |
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269 // consider using safe_object_iterate() which avoids perm gen |
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270 // objects that may contain bad references. |
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271 Universe::heap()->object_iterate(&ric); |
0 | 272 |
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273 // Report if certain classes are not counted because of |
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274 // running out of C-heap for the histogram. |
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275 size_t missed_count = ric.missed_count(); |
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276 if (missed_count != 0) { |
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277 st->print_cr("WARNING: Ran out of C-heap; undercounted " SIZE_FORMAT |
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278 " total instances in data below", |
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279 missed_count); |
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280 } |
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281 // Sort and print klass instance info |
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282 KlassInfoHisto histo("\n" |
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283 " num #instances #bytes class name\n" |
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284 "----------------------------------------------", |
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285 KlassInfoHisto::histo_initial_size); |
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286 HistoClosure hc(&histo); |
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287 cit.iterate(&hc); |
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288 histo.sort(); |
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289 histo.print_on(st); |
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290 } else { |
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291 st->print_cr("WARNING: Ran out of C-heap; histogram not generated"); |
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292 } |
0 | 293 st->flush(); |
294 | |
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295 if (need_prologue && is_shared_heap) { |
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296 SharedHeap* sh = (SharedHeap*)heap; |
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297 sh->gc_epilogue(false /* !full */); // release all acquired locks, etc. |
0 | 298 } |
299 } | |
300 | |
301 class FindInstanceClosure : public ObjectClosure { | |
302 private: | |
303 klassOop _klass; | |
304 GrowableArray<oop>* _result; | |
305 | |
306 public: | |
307 FindInstanceClosure(klassOop k, GrowableArray<oop>* result) : _klass(k), _result(result) {}; | |
308 | |
309 void do_object(oop obj) { | |
310 if (obj->is_a(_klass)) { | |
311 _result->append(obj); | |
312 } | |
313 } | |
314 }; | |
315 | |
316 void HeapInspection::find_instances_at_safepoint(klassOop k, GrowableArray<oop>* result) { | |
317 assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped"); | |
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318 assert(Heap_lock->is_locked(), "should have the Heap_lock"); |
0 | 319 |
320 // Ensure that the heap is parsable | |
321 Universe::heap()->ensure_parsability(false); // no need to retire TALBs | |
322 | |
323 // Iterate over objects in the heap | |
324 FindInstanceClosure fic(k, result); | |
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325 // If this operation encounters a bad object when using CMS, |
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326 // consider using safe_object_iterate() which avoids perm gen |
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327 // objects that may contain bad references. |
0 | 328 Universe::heap()->object_iterate(&fic); |
329 } |