Mercurial > hg > graal-compiler
annotate src/share/vm/memory/heapInspection.cpp @ 18027:9f169829d0e1
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author | asaha |
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date | Tue, 08 Jul 2014 13:25:13 -0700 |
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0 | 1 /* |
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2 * Copyright (c) 2002, 2014, 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" |
7956 | 26 #include "classfile/classLoaderData.hpp" |
1972 | 27 #include "gc_interface/collectedHeap.hpp" |
28 #include "memory/genCollectedHeap.hpp" | |
29 #include "memory/heapInspection.hpp" | |
30 #include "memory/resourceArea.hpp" | |
31 #include "runtime/os.hpp" | |
32 #include "utilities/globalDefinitions.hpp" | |
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33 #include "utilities/macros.hpp" |
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34 #if INCLUDE_ALL_GCS |
1972 | 35 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" |
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36 #endif // INCLUDE_ALL_GCS |
0 | 37 |
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38 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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39 |
0 | 40 // HeapInspection |
41 | |
42 int KlassInfoEntry::compare(KlassInfoEntry* e1, KlassInfoEntry* e2) { | |
43 if(e1->_instance_words > e2->_instance_words) { | |
44 return -1; | |
45 } else if(e1->_instance_words < e2->_instance_words) { | |
46 return 1; | |
47 } | |
7956 | 48 // Sort alphabetically, note 'Z' < '[' < 'a', but it's better to group |
49 // the array classes before all the instance classes. | |
50 ResourceMark rm; | |
51 const char* name1 = e1->klass()->external_name(); | |
52 const char* name2 = e2->klass()->external_name(); | |
53 bool d1 = (name1[0] == '['); | |
54 bool d2 = (name2[0] == '['); | |
55 if (d1 && !d2) { | |
56 return -1; | |
57 } else if (d2 && !d1) { | |
58 return 1; | |
59 } else { | |
60 return strcmp(name1, name2); | |
61 } | |
0 | 62 } |
63 | |
7956 | 64 const char* KlassInfoEntry::name() const { |
65 const char* name; | |
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66 if (_klass->name() != NULL) { |
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67 name = _klass->external_name(); |
0 | 68 } else { |
69 if (_klass == Universe::boolArrayKlassObj()) name = "<boolArrayKlass>"; else | |
70 if (_klass == Universe::charArrayKlassObj()) name = "<charArrayKlass>"; else | |
71 if (_klass == Universe::singleArrayKlassObj()) name = "<singleArrayKlass>"; else | |
72 if (_klass == Universe::doubleArrayKlassObj()) name = "<doubleArrayKlass>"; else | |
73 if (_klass == Universe::byteArrayKlassObj()) name = "<byteArrayKlass>"; else | |
74 if (_klass == Universe::shortArrayKlassObj()) name = "<shortArrayKlass>"; else | |
75 if (_klass == Universe::intArrayKlassObj()) name = "<intArrayKlass>"; else | |
76 if (_klass == Universe::longArrayKlassObj()) name = "<longArrayKlass>"; else | |
77 name = "<no name>"; | |
78 } | |
7956 | 79 return name; |
80 } | |
81 | |
82 void KlassInfoEntry::print_on(outputStream* st) const { | |
83 ResourceMark rm; | |
84 | |
0 | 85 // simplify the formatting (ILP32 vs LP64) - always cast the numbers to 64-bit |
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86 st->print_cr(INT64_FORMAT_W(13) " " UINT64_FORMAT_W(13) " %s", |
0 | 87 (jlong) _instance_count, |
88 (julong) _instance_words * HeapWordSize, | |
7956 | 89 name()); |
0 | 90 } |
91 | |
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92 KlassInfoEntry* KlassInfoBucket::lookup(Klass* const k) { |
0 | 93 KlassInfoEntry* elt = _list; |
94 while (elt != NULL) { | |
95 if (elt->is_equal(k)) { | |
96 return elt; | |
97 } | |
98 elt = elt->next(); | |
99 } | |
10405 | 100 elt = new (std::nothrow) KlassInfoEntry(k, list()); |
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101 // We may be out of space to allocate the new entry. |
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102 if (elt != NULL) { |
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103 set_list(elt); |
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104 } |
0 | 105 return elt; |
106 } | |
107 | |
108 void KlassInfoBucket::iterate(KlassInfoClosure* cic) { | |
109 KlassInfoEntry* elt = _list; | |
110 while (elt != NULL) { | |
111 cic->do_cinfo(elt); | |
112 elt = elt->next(); | |
113 } | |
114 } | |
115 | |
116 void KlassInfoBucket::empty() { | |
117 KlassInfoEntry* elt = _list; | |
118 _list = NULL; | |
119 while (elt != NULL) { | |
120 KlassInfoEntry* next = elt->next(); | |
121 delete elt; | |
122 elt = next; | |
123 } | |
124 } | |
125 | |
7956 | 126 void KlassInfoTable::AllClassesFinder::do_klass(Klass* k) { |
127 // This has the SIDE EFFECT of creating a KlassInfoEntry | |
128 // for <k>, if one doesn't exist yet. | |
129 _table->lookup(k); | |
130 } | |
131 | |
10405 | 132 KlassInfoTable::KlassInfoTable(bool need_class_stats) { |
133 _size_of_instances_in_words = 0; | |
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134 _size = 0; |
10405 | 135 _ref = (HeapWord*) Universe::boolArrayKlassObj(); |
136 _buckets = | |
137 (KlassInfoBucket*) AllocateHeap(sizeof(KlassInfoBucket) * _num_buckets, | |
138 mtInternal, 0, AllocFailStrategy::RETURN_NULL); | |
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139 if (_buckets != NULL) { |
10405 | 140 _size = _num_buckets; |
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141 for (int index = 0; index < _size; index++) { |
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142 _buckets[index].initialize(); |
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143 } |
7956 | 144 if (need_class_stats) { |
145 AllClassesFinder finder(this); | |
146 ClassLoaderDataGraph::classes_do(&finder); | |
147 } | |
0 | 148 } |
149 } | |
150 | |
151 KlassInfoTable::~KlassInfoTable() { | |
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152 if (_buckets != NULL) { |
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153 for (int index = 0; index < _size; index++) { |
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154 _buckets[index].empty(); |
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155 } |
6197 | 156 FREE_C_HEAP_ARRAY(KlassInfoBucket, _buckets, mtInternal); |
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157 _size = 0; |
0 | 158 } |
159 } | |
160 | |
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161 uint KlassInfoTable::hash(const Klass* p) { |
0 | 162 return (uint)(((uintptr_t)p - (uintptr_t)_ref) >> 2); |
163 } | |
164 | |
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165 KlassInfoEntry* KlassInfoTable::lookup(Klass* k) { |
0 | 166 uint idx = hash(k) % _size; |
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167 assert(_buckets != NULL, "Allocation failure should have been caught"); |
0 | 168 KlassInfoEntry* e = _buckets[idx].lookup(k); |
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169 // Lookup may fail if this is a new klass for which we |
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170 // could not allocate space for an new entry. |
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171 assert(e == NULL || k == e->klass(), "must be equal"); |
0 | 172 return e; |
173 } | |
174 | |
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175 // Return false if the entry could not be recorded on account |
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176 // of running out of space required to create a new entry. |
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177 bool KlassInfoTable::record_instance(const oop obj) { |
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178 Klass* k = obj->klass(); |
0 | 179 KlassInfoEntry* elt = lookup(k); |
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180 // elt may be NULL if it's a new klass for which we |
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181 // could not allocate space for a new entry in the hashtable. |
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182 if (elt != NULL) { |
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183 elt->set_count(elt->count() + 1); |
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184 elt->set_words(elt->words() + obj->size()); |
10405 | 185 _size_of_instances_in_words += obj->size(); |
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186 return true; |
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187 } else { |
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188 return false; |
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189 } |
0 | 190 } |
191 | |
192 void KlassInfoTable::iterate(KlassInfoClosure* cic) { | |
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193 assert(_size == 0 || _buckets != NULL, "Allocation failure should have been caught"); |
0 | 194 for (int index = 0; index < _size; index++) { |
195 _buckets[index].iterate(cic); | |
196 } | |
197 } | |
198 | |
10405 | 199 size_t KlassInfoTable::size_of_instances_in_words() const { |
200 return _size_of_instances_in_words; | |
201 } | |
202 | |
0 | 203 int KlassInfoHisto::sort_helper(KlassInfoEntry** e1, KlassInfoEntry** e2) { |
204 return (*e1)->compare(*e1,*e2); | |
205 } | |
206 | |
10405 | 207 KlassInfoHisto::KlassInfoHisto(KlassInfoTable* cit, const char* title) : |
7956 | 208 _cit(cit), |
0 | 209 _title(title) { |
10405 | 210 _elements = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<KlassInfoEntry*>(_histo_initial_size, true); |
0 | 211 } |
212 | |
213 KlassInfoHisto::~KlassInfoHisto() { | |
214 delete _elements; | |
215 } | |
216 | |
217 void KlassInfoHisto::add(KlassInfoEntry* cie) { | |
218 elements()->append(cie); | |
219 } | |
220 | |
221 void KlassInfoHisto::sort() { | |
222 elements()->sort(KlassInfoHisto::sort_helper); | |
223 } | |
224 | |
225 void KlassInfoHisto::print_elements(outputStream* st) const { | |
226 // simplify the formatting (ILP32 vs LP64) - store the sum in 64-bit | |
227 jlong total = 0; | |
228 julong totalw = 0; | |
229 for(int i=0; i < elements()->length(); i++) { | |
230 st->print("%4d: ", i+1); | |
231 elements()->at(i)->print_on(st); | |
232 total += elements()->at(i)->count(); | |
233 totalw += elements()->at(i)->words(); | |
234 } | |
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235 st->print_cr("Total " INT64_FORMAT_W(13) " " UINT64_FORMAT_W(13), |
0 | 236 total, totalw * HeapWordSize); |
237 } | |
238 | |
7956 | 239 #define MAKE_COL_NAME(field, name, help) #name, |
240 #define MAKE_COL_HELP(field, name, help) help, | |
241 | |
242 static const char *name_table[] = { | |
243 HEAP_INSPECTION_COLUMNS_DO(MAKE_COL_NAME) | |
244 }; | |
245 | |
246 static const char *help_table[] = { | |
247 HEAP_INSPECTION_COLUMNS_DO(MAKE_COL_HELP) | |
248 }; | |
249 | |
250 bool KlassInfoHisto::is_selected(const char *col_name) { | |
251 if (_selected_columns == NULL) { | |
252 return true; | |
253 } | |
254 if (strcmp(_selected_columns, col_name) == 0) { | |
255 return true; | |
256 } | |
257 | |
258 const char *start = strstr(_selected_columns, col_name); | |
259 if (start == NULL) { | |
260 return false; | |
261 } | |
262 | |
263 // The following must be true, because _selected_columns != col_name | |
264 if (start > _selected_columns && start[-1] != ',') { | |
265 return false; | |
266 } | |
267 char x = start[strlen(col_name)]; | |
268 if (x != ',' && x != '\0') { | |
269 return false; | |
270 } | |
271 | |
272 return true; | |
273 } | |
274 | |
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275 PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL |
7956 | 276 void KlassInfoHisto::print_title(outputStream* st, bool csv_format, |
277 bool selected[], int width_table[], | |
278 const char *name_table[]) { | |
279 if (csv_format) { | |
280 st->print("Index,Super"); | |
281 for (int c=0; c<KlassSizeStats::_num_columns; c++) { | |
282 if (selected[c]) {st->print(",%s", name_table[c]);} | |
283 } | |
284 st->print(",ClassName"); | |
285 } else { | |
286 st->print("Index Super"); | |
287 for (int c=0; c<KlassSizeStats::_num_columns; c++) { | |
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288 PRAGMA_DIAG_PUSH |
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289 PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL |
7956 | 290 if (selected[c]) {st->print(str_fmt(width_table[c]), name_table[c]);} |
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291 PRAGMA_DIAG_POP |
7956 | 292 } |
293 st->print(" ClassName"); | |
294 } | |
295 | |
296 if (is_selected("ClassLoader")) { | |
297 st->print(",ClassLoader"); | |
298 } | |
299 st->cr(); | |
300 } | |
301 | |
302 void KlassInfoHisto::print_class_stats(outputStream* st, | |
303 bool csv_format, const char *columns) { | |
304 ResourceMark rm; | |
305 KlassSizeStats sz, sz_sum; | |
306 int i; | |
307 julong *col_table = (julong*)(&sz); | |
308 julong *colsum_table = (julong*)(&sz_sum); | |
309 int width_table[KlassSizeStats::_num_columns]; | |
310 bool selected[KlassSizeStats::_num_columns]; | |
311 | |
312 _selected_columns = columns; | |
313 | |
314 memset(&sz_sum, 0, sizeof(sz_sum)); | |
315 for (int c=0; c<KlassSizeStats::_num_columns; c++) { | |
316 selected[c] = is_selected(name_table[c]); | |
317 } | |
318 | |
319 for(i=0; i < elements()->length(); i++) { | |
320 elements()->at(i)->set_index(i+1); | |
321 } | |
322 | |
323 for (int pass=1; pass<=2; pass++) { | |
324 if (pass == 2) { | |
325 print_title(st, csv_format, selected, width_table, name_table); | |
326 } | |
327 for(i=0; i < elements()->length(); i++) { | |
328 KlassInfoEntry* e = (KlassInfoEntry*)elements()->at(i); | |
329 const Klass* k = e->klass(); | |
330 | |
331 memset(&sz, 0, sizeof(sz)); | |
332 sz._inst_count = e->count(); | |
333 sz._inst_bytes = HeapWordSize * e->words(); | |
334 k->collect_statistics(&sz); | |
335 sz._total_bytes = sz._ro_bytes + sz._rw_bytes; | |
336 | |
337 if (pass == 1) { | |
338 for (int c=0; c<KlassSizeStats::_num_columns; c++) { | |
339 colsum_table[c] += col_table[c]; | |
340 } | |
341 } else { | |
342 int super_index = -1; | |
343 if (k->oop_is_instance()) { | |
344 Klass* super = ((InstanceKlass*)k)->java_super(); | |
345 if (super) { | |
346 KlassInfoEntry* super_e = _cit->lookup(super); | |
347 if (super_e) { | |
348 super_index = super_e->index(); | |
349 } | |
350 } | |
351 } | |
352 | |
353 if (csv_format) { | |
354 st->print("%d,%d", e->index(), super_index); | |
355 for (int c=0; c<KlassSizeStats::_num_columns; c++) { | |
356 if (selected[c]) {st->print("," JULONG_FORMAT, col_table[c]);} | |
357 } | |
358 st->print(",%s",e->name()); | |
359 } else { | |
360 st->print("%5d %5d", e->index(), super_index); | |
361 for (int c=0; c<KlassSizeStats::_num_columns; c++) { | |
362 if (selected[c]) {print_julong(st, width_table[c], col_table[c]);} | |
363 } | |
364 st->print(" %s", e->name()); | |
365 } | |
366 if (is_selected("ClassLoader")) { | |
367 ClassLoaderData* loader_data = k->class_loader_data(); | |
368 st->print(","); | |
369 loader_data->print_value_on(st); | |
370 } | |
371 st->cr(); | |
372 } | |
373 } | |
374 | |
375 if (pass == 1) { | |
376 for (int c=0; c<KlassSizeStats::_num_columns; c++) { | |
377 width_table[c] = col_width(colsum_table[c], name_table[c]); | |
378 } | |
379 } | |
380 } | |
381 | |
382 sz_sum._inst_size = 0; | |
383 | |
384 if (csv_format) { | |
385 st->print(","); | |
386 for (int c=0; c<KlassSizeStats::_num_columns; c++) { | |
387 if (selected[c]) {st->print("," JULONG_FORMAT, colsum_table[c]);} | |
388 } | |
389 } else { | |
390 st->print(" "); | |
391 for (int c=0; c<KlassSizeStats::_num_columns; c++) { | |
392 if (selected[c]) {print_julong(st, width_table[c], colsum_table[c]);} | |
393 } | |
394 st->print(" Total"); | |
395 if (sz_sum._total_bytes > 0) { | |
396 st->cr(); | |
397 st->print(" "); | |
398 for (int c=0; c<KlassSizeStats::_num_columns; c++) { | |
399 if (selected[c]) { | |
400 switch (c) { | |
401 case KlassSizeStats::_index_inst_size: | |
402 case KlassSizeStats::_index_inst_count: | |
403 case KlassSizeStats::_index_method_count: | |
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404 PRAGMA_DIAG_PUSH |
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405 PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL |
7956 | 406 st->print(str_fmt(width_table[c]), "-"); |
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407 PRAGMA_DIAG_POP |
7956 | 408 break; |
409 default: | |
410 { | |
411 double perc = (double)(100) * (double)(colsum_table[c]) / (double)sz_sum._total_bytes; | |
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412 PRAGMA_DIAG_PUSH |
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413 PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL |
7956 | 414 st->print(perc_fmt(width_table[c]), perc); |
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415 PRAGMA_DIAG_POP |
7956 | 416 } |
417 } | |
418 } | |
419 } | |
420 } | |
421 } | |
422 st->cr(); | |
423 | |
424 if (!csv_format) { | |
425 print_title(st, csv_format, selected, width_table, name_table); | |
426 } | |
427 } | |
428 | |
429 julong KlassInfoHisto::annotations_bytes(Array<AnnotationArray*>* p) const { | |
430 julong bytes = 0; | |
431 if (p != NULL) { | |
432 for (int i = 0; i < p->length(); i++) { | |
433 bytes += count_bytes_array(p->at(i)); | |
434 } | |
435 bytes += count_bytes_array(p); | |
436 } | |
437 return bytes; | |
438 } | |
439 | |
440 void KlassInfoHisto::print_histo_on(outputStream* st, bool print_stats, | |
441 bool csv_format, const char *columns) { | |
442 if (print_stats) { | |
443 print_class_stats(st, csv_format, columns); | |
444 } else { | |
445 st->print_cr("%s",title()); | |
446 print_elements(st); | |
447 } | |
0 | 448 } |
449 | |
450 class HistoClosure : public KlassInfoClosure { | |
451 private: | |
452 KlassInfoHisto* _cih; | |
453 public: | |
454 HistoClosure(KlassInfoHisto* cih) : _cih(cih) {} | |
455 | |
456 void do_cinfo(KlassInfoEntry* cie) { | |
457 _cih->add(cie); | |
458 } | |
459 }; | |
460 | |
461 class RecordInstanceClosure : public ObjectClosure { | |
462 private: | |
463 KlassInfoTable* _cit; | |
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464 size_t _missed_count; |
10405 | 465 BoolObjectClosure* _filter; |
0 | 466 public: |
10405 | 467 RecordInstanceClosure(KlassInfoTable* cit, BoolObjectClosure* filter) : |
468 _cit(cit), _missed_count(0), _filter(filter) {} | |
0 | 469 |
470 void do_object(oop obj) { | |
10405 | 471 if (should_visit(obj)) { |
472 if (!_cit->record_instance(obj)) { | |
473 _missed_count++; | |
474 } | |
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475 } |
0 | 476 } |
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477 |
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478 size_t missed_count() { return _missed_count; } |
10405 | 479 |
480 private: | |
481 bool should_visit(oop obj) { | |
482 return _filter == NULL || _filter->do_object_b(obj); | |
483 } | |
0 | 484 }; |
485 | |
10405 | 486 size_t HeapInspection::populate_table(KlassInfoTable* cit, BoolObjectClosure *filter) { |
0 | 487 ResourceMark rm; |
10405 | 488 |
489 RecordInstanceClosure ric(cit, filter); | |
490 Universe::heap()->object_iterate(&ric); | |
491 return ric.missed_count(); | |
492 } | |
493 | |
494 void HeapInspection::heap_inspection(outputStream* st) { | |
495 ResourceMark rm; | |
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496 |
7956 | 497 if (_print_help) { |
498 for (int c=0; c<KlassSizeStats::_num_columns; c++) { | |
499 st->print("%s:\n\t", name_table[c]); | |
500 const int max_col = 60; | |
501 int col = 0; | |
502 for (const char *p = help_table[c]; *p; p++,col++) { | |
503 if (col >= max_col && *p == ' ') { | |
504 st->print("\n\t"); | |
505 col = 0; | |
506 } else { | |
507 st->print("%c", *p); | |
508 } | |
509 } | |
510 st->print_cr(".\n"); | |
511 } | |
512 return; | |
513 } | |
514 | |
10405 | 515 KlassInfoTable cit(_print_class_stats); |
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516 if (!cit.allocation_failed()) { |
10405 | 517 size_t missed_count = populate_table(&cit); |
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518 if (missed_count != 0) { |
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519 st->print_cr("WARNING: Ran out of C-heap; undercounted " SIZE_FORMAT |
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520 " total instances in data below", |
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521 missed_count); |
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522 } |
10405 | 523 |
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524 // Sort and print klass instance info |
7956 | 525 const char *title = "\n" |
526 " num #instances #bytes class name\n" | |
527 "----------------------------------------------"; | |
10405 | 528 KlassInfoHisto histo(&cit, title); |
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529 HistoClosure hc(&histo); |
10405 | 530 |
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531 cit.iterate(&hc); |
10405 | 532 |
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533 histo.sort(); |
7956 | 534 histo.print_histo_on(st, _print_class_stats, _csv_format, _columns); |
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535 } else { |
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536 st->print_cr("WARNING: Ran out of C-heap; histogram not generated"); |
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537 } |
0 | 538 st->flush(); |
539 } | |
540 | |
541 class FindInstanceClosure : public ObjectClosure { | |
542 private: | |
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543 Klass* _klass; |
0 | 544 GrowableArray<oop>* _result; |
545 | |
546 public: | |
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547 FindInstanceClosure(Klass* k, GrowableArray<oop>* result) : _klass(k), _result(result) {}; |
0 | 548 |
549 void do_object(oop obj) { | |
550 if (obj->is_a(_klass)) { | |
551 _result->append(obj); | |
552 } | |
553 } | |
554 }; | |
555 | |
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556 void HeapInspection::find_instances_at_safepoint(Klass* k, GrowableArray<oop>* result) { |
0 | 557 assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped"); |
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558 assert(Heap_lock->is_locked(), "should have the Heap_lock"); |
0 | 559 |
560 // Ensure that the heap is parsable | |
561 Universe::heap()->ensure_parsability(false); // no need to retire TALBs | |
562 | |
563 // Iterate over objects in the heap | |
564 FindInstanceClosure fic(k, result); | |
517
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565 // If this operation encounters a bad object when using CMS, |
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566 // consider using safe_object_iterate() which avoids metadata |
517
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567 // objects that may contain bad references. |
0 | 568 Universe::heap()->object_iterate(&fic); |
569 } |