| /* |
| * Copyright (c) 2002, 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "classfile/classLoaderData.hpp" |
| #include "gc_interface/collectedHeap.hpp" |
| #include "memory/genCollectedHeap.hpp" |
| #include "memory/heapInspection.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "runtime/os.hpp" |
| #include "utilities/globalDefinitions.hpp" |
| #include "utilities/macros.hpp" |
| #if INCLUDE_ALL_GCS |
| #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" |
| #endif // INCLUDE_ALL_GCS |
| |
| PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
| |
| // HeapInspection |
| |
| int KlassInfoEntry::compare(KlassInfoEntry* e1, KlassInfoEntry* e2) { |
| if(e1->_instance_words > e2->_instance_words) { |
| return -1; |
| } else if(e1->_instance_words < e2->_instance_words) { |
| return 1; |
| } |
| // Sort alphabetically, note 'Z' < '[' < 'a', but it's better to group |
| // the array classes before all the instance classes. |
| ResourceMark rm; |
| const char* name1 = e1->klass()->external_name(); |
| const char* name2 = e2->klass()->external_name(); |
| bool d1 = (name1[0] == '['); |
| bool d2 = (name2[0] == '['); |
| if (d1 && !d2) { |
| return -1; |
| } else if (d2 && !d1) { |
| return 1; |
| } else { |
| return strcmp(name1, name2); |
| } |
| } |
| |
| const char* KlassInfoEntry::name() const { |
| const char* name; |
| if (_klass->name() != NULL) { |
| name = _klass->external_name(); |
| } else { |
| if (_klass == Universe::boolArrayKlassObj()) name = "<boolArrayKlass>"; else |
| if (_klass == Universe::charArrayKlassObj()) name = "<charArrayKlass>"; else |
| if (_klass == Universe::singleArrayKlassObj()) name = "<singleArrayKlass>"; else |
| if (_klass == Universe::doubleArrayKlassObj()) name = "<doubleArrayKlass>"; else |
| if (_klass == Universe::byteArrayKlassObj()) name = "<byteArrayKlass>"; else |
| if (_klass == Universe::shortArrayKlassObj()) name = "<shortArrayKlass>"; else |
| if (_klass == Universe::intArrayKlassObj()) name = "<intArrayKlass>"; else |
| if (_klass == Universe::longArrayKlassObj()) name = "<longArrayKlass>"; else |
| name = "<no name>"; |
| } |
| return name; |
| } |
| |
| void KlassInfoEntry::print_on(outputStream* st) const { |
| ResourceMark rm; |
| |
| // simplify the formatting (ILP32 vs LP64) - always cast the numbers to 64-bit |
| st->print_cr(INT64_FORMAT_W(13) " " UINT64_FORMAT_W(13) " %s", |
| (jlong) _instance_count, |
| (julong) _instance_words * HeapWordSize, |
| name()); |
| } |
| |
| KlassInfoEntry* KlassInfoBucket::lookup(Klass* const k) { |
| KlassInfoEntry* elt = _list; |
| while (elt != NULL) { |
| if (elt->is_equal(k)) { |
| return elt; |
| } |
| elt = elt->next(); |
| } |
| elt = new (std::nothrow) KlassInfoEntry(k, list()); |
| // We may be out of space to allocate the new entry. |
| if (elt != NULL) { |
| set_list(elt); |
| } |
| return elt; |
| } |
| |
| void KlassInfoBucket::iterate(KlassInfoClosure* cic) { |
| KlassInfoEntry* elt = _list; |
| while (elt != NULL) { |
| cic->do_cinfo(elt); |
| elt = elt->next(); |
| } |
| } |
| |
| void KlassInfoBucket::empty() { |
| KlassInfoEntry* elt = _list; |
| _list = NULL; |
| while (elt != NULL) { |
| KlassInfoEntry* next = elt->next(); |
| delete elt; |
| elt = next; |
| } |
| } |
| |
| void KlassInfoTable::AllClassesFinder::do_klass(Klass* k) { |
| // This has the SIDE EFFECT of creating a KlassInfoEntry |
| // for <k>, if one doesn't exist yet. |
| _table->lookup(k); |
| } |
| |
| KlassInfoTable::KlassInfoTable(bool need_class_stats) { |
| _size_of_instances_in_words = 0; |
| _size = 0; |
| _ref = (HeapWord*) Universe::boolArrayKlassObj(); |
| _buckets = |
| (KlassInfoBucket*) AllocateHeap(sizeof(KlassInfoBucket) * _num_buckets, |
| mtInternal, CURRENT_PC, AllocFailStrategy::RETURN_NULL); |
| if (_buckets != NULL) { |
| _size = _num_buckets; |
| for (int index = 0; index < _size; index++) { |
| _buckets[index].initialize(); |
| } |
| if (need_class_stats) { |
| AllClassesFinder finder(this); |
| ClassLoaderDataGraph::classes_do(&finder); |
| } |
| } |
| } |
| |
| KlassInfoTable::~KlassInfoTable() { |
| if (_buckets != NULL) { |
| for (int index = 0; index < _size; index++) { |
| _buckets[index].empty(); |
| } |
| FREE_C_HEAP_ARRAY(KlassInfoBucket, _buckets, mtInternal); |
| _size = 0; |
| } |
| } |
| |
| uint KlassInfoTable::hash(const Klass* p) { |
| return (uint)(((uintptr_t)p - (uintptr_t)_ref) >> 2); |
| } |
| |
| KlassInfoEntry* KlassInfoTable::lookup(Klass* k) { |
| uint idx = hash(k) % _size; |
| assert(_buckets != NULL, "Allocation failure should have been caught"); |
| KlassInfoEntry* e = _buckets[idx].lookup(k); |
| // Lookup may fail if this is a new klass for which we |
| // could not allocate space for an new entry. |
| assert(e == NULL || k == e->klass(), "must be equal"); |
| return e; |
| } |
| |
| // Return false if the entry could not be recorded on account |
| // of running out of space required to create a new entry. |
| bool KlassInfoTable::record_instance(const oop obj) { |
| Klass* k = obj->klass(); |
| KlassInfoEntry* elt = lookup(k); |
| // elt may be NULL if it's a new klass for which we |
| // could not allocate space for a new entry in the hashtable. |
| if (elt != NULL) { |
| elt->set_count(elt->count() + 1); |
| elt->set_words(elt->words() + obj->size()); |
| _size_of_instances_in_words += obj->size(); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| void KlassInfoTable::iterate(KlassInfoClosure* cic) { |
| assert(_size == 0 || _buckets != NULL, "Allocation failure should have been caught"); |
| for (int index = 0; index < _size; index++) { |
| _buckets[index].iterate(cic); |
| } |
| } |
| |
| size_t KlassInfoTable::size_of_instances_in_words() const { |
| return _size_of_instances_in_words; |
| } |
| |
| int KlassInfoHisto::sort_helper(KlassInfoEntry** e1, KlassInfoEntry** e2) { |
| return (*e1)->compare(*e1,*e2); |
| } |
| |
| KlassInfoHisto::KlassInfoHisto(KlassInfoTable* cit, const char* title) : |
| _cit(cit), |
| _title(title) { |
| _elements = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<KlassInfoEntry*>(_histo_initial_size, true); |
| } |
| |
| KlassInfoHisto::~KlassInfoHisto() { |
| delete _elements; |
| } |
| |
| void KlassInfoHisto::add(KlassInfoEntry* cie) { |
| elements()->append(cie); |
| } |
| |
| void KlassInfoHisto::sort() { |
| elements()->sort(KlassInfoHisto::sort_helper); |
| } |
| |
| void KlassInfoHisto::print_elements(outputStream* st) const { |
| // simplify the formatting (ILP32 vs LP64) - store the sum in 64-bit |
| jlong total = 0; |
| julong totalw = 0; |
| for(int i=0; i < elements()->length(); i++) { |
| st->print("%4d: ", i+1); |
| elements()->at(i)->print_on(st); |
| total += elements()->at(i)->count(); |
| totalw += elements()->at(i)->words(); |
| } |
| st->print_cr("Total " INT64_FORMAT_W(13) " " UINT64_FORMAT_W(13), |
| total, totalw * HeapWordSize); |
| } |
| |
| #define MAKE_COL_NAME(field, name, help) #name, |
| #define MAKE_COL_HELP(field, name, help) help, |
| |
| static const char *name_table[] = { |
| HEAP_INSPECTION_COLUMNS_DO(MAKE_COL_NAME) |
| }; |
| |
| static const char *help_table[] = { |
| HEAP_INSPECTION_COLUMNS_DO(MAKE_COL_HELP) |
| }; |
| |
| bool KlassInfoHisto::is_selected(const char *col_name) { |
| if (_selected_columns == NULL) { |
| return true; |
| } |
| if (strcmp(_selected_columns, col_name) == 0) { |
| return true; |
| } |
| |
| const char *start = strstr(_selected_columns, col_name); |
| if (start == NULL) { |
| return false; |
| } |
| |
| // The following must be true, because _selected_columns != col_name |
| if (start > _selected_columns && start[-1] != ',') { |
| return false; |
| } |
| char x = start[strlen(col_name)]; |
| if (x != ',' && x != '\0') { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| PRAGMA_FORMAT_NONLITERAL_IGNORED_EXTERNAL |
| void KlassInfoHisto::print_title(outputStream* st, bool csv_format, |
| bool selected[], int width_table[], |
| const char *name_table[]) { |
| if (csv_format) { |
| st->print("Index,Super"); |
| for (int c=0; c<KlassSizeStats::_num_columns; c++) { |
| if (selected[c]) {st->print(",%s", name_table[c]);} |
| } |
| st->print(",ClassName"); |
| } else { |
| st->print("Index Super"); |
| for (int c=0; c<KlassSizeStats::_num_columns; c++) { |
| PRAGMA_DIAG_PUSH |
| PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL |
| if (selected[c]) {st->print(str_fmt(width_table[c]), name_table[c]);} |
| PRAGMA_DIAG_POP |
| } |
| st->print(" ClassName"); |
| } |
| |
| if (is_selected("ClassLoader")) { |
| st->print(",ClassLoader"); |
| } |
| st->cr(); |
| } |
| |
| void KlassInfoHisto::print_class_stats(outputStream* st, |
| bool csv_format, const char *columns) { |
| ResourceMark rm; |
| KlassSizeStats sz, sz_sum; |
| int i; |
| julong *col_table = (julong*)(&sz); |
| julong *colsum_table = (julong*)(&sz_sum); |
| int width_table[KlassSizeStats::_num_columns]; |
| bool selected[KlassSizeStats::_num_columns]; |
| |
| _selected_columns = columns; |
| |
| memset(&sz_sum, 0, sizeof(sz_sum)); |
| for (int c=0; c<KlassSizeStats::_num_columns; c++) { |
| selected[c] = is_selected(name_table[c]); |
| } |
| |
| for(i=0; i < elements()->length(); i++) { |
| elements()->at(i)->set_index(i+1); |
| } |
| |
| for (int pass=1; pass<=2; pass++) { |
| if (pass == 2) { |
| print_title(st, csv_format, selected, width_table, name_table); |
| } |
| for(i=0; i < elements()->length(); i++) { |
| KlassInfoEntry* e = (KlassInfoEntry*)elements()->at(i); |
| const Klass* k = e->klass(); |
| |
| memset(&sz, 0, sizeof(sz)); |
| sz._inst_count = e->count(); |
| sz._inst_bytes = HeapWordSize * e->words(); |
| k->collect_statistics(&sz); |
| sz._total_bytes = sz._ro_bytes + sz._rw_bytes; |
| |
| if (pass == 1) { |
| for (int c=0; c<KlassSizeStats::_num_columns; c++) { |
| colsum_table[c] += col_table[c]; |
| } |
| } else { |
| int super_index = -1; |
| if (k->oop_is_instance()) { |
| Klass* super = ((InstanceKlass*)k)->java_super(); |
| if (super) { |
| KlassInfoEntry* super_e = _cit->lookup(super); |
| if (super_e) { |
| super_index = super_e->index(); |
| } |
| } |
| } |
| |
| if (csv_format) { |
| st->print("%d,%d", e->index(), super_index); |
| for (int c=0; c<KlassSizeStats::_num_columns; c++) { |
| if (selected[c]) {st->print("," JULONG_FORMAT, col_table[c]);} |
| } |
| st->print(",%s",e->name()); |
| } else { |
| st->print("%5d %5d", e->index(), super_index); |
| for (int c=0; c<KlassSizeStats::_num_columns; c++) { |
| if (selected[c]) {print_julong(st, width_table[c], col_table[c]);} |
| } |
| st->print(" %s", e->name()); |
| } |
| if (is_selected("ClassLoader")) { |
| ClassLoaderData* loader_data = k->class_loader_data(); |
| st->print(","); |
| loader_data->print_value_on(st); |
| } |
| st->cr(); |
| } |
| } |
| |
| if (pass == 1) { |
| for (int c=0; c<KlassSizeStats::_num_columns; c++) { |
| width_table[c] = col_width(colsum_table[c], name_table[c]); |
| } |
| } |
| } |
| |
| sz_sum._inst_size = 0; |
| |
| if (csv_format) { |
| st->print(","); |
| for (int c=0; c<KlassSizeStats::_num_columns; c++) { |
| if (selected[c]) {st->print("," JULONG_FORMAT, colsum_table[c]);} |
| } |
| } else { |
| st->print(" "); |
| for (int c=0; c<KlassSizeStats::_num_columns; c++) { |
| if (selected[c]) {print_julong(st, width_table[c], colsum_table[c]);} |
| } |
| st->print(" Total"); |
| if (sz_sum._total_bytes > 0) { |
| st->cr(); |
| st->print(" "); |
| for (int c=0; c<KlassSizeStats::_num_columns; c++) { |
| if (selected[c]) { |
| switch (c) { |
| case KlassSizeStats::_index_inst_size: |
| case KlassSizeStats::_index_inst_count: |
| case KlassSizeStats::_index_method_count: |
| PRAGMA_DIAG_PUSH |
| PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL |
| st->print(str_fmt(width_table[c]), "-"); |
| PRAGMA_DIAG_POP |
| break; |
| default: |
| { |
| double perc = (double)(100) * (double)(colsum_table[c]) / (double)sz_sum._total_bytes; |
| PRAGMA_DIAG_PUSH |
| PRAGMA_FORMAT_NONLITERAL_IGNORED_INTERNAL |
| st->print(perc_fmt(width_table[c]), perc); |
| PRAGMA_DIAG_POP |
| } |
| } |
| } |
| } |
| } |
| } |
| st->cr(); |
| |
| if (!csv_format) { |
| print_title(st, csv_format, selected, width_table, name_table); |
| } |
| } |
| |
| julong KlassInfoHisto::annotations_bytes(Array<AnnotationArray*>* p) const { |
| julong bytes = 0; |
| if (p != NULL) { |
| for (int i = 0; i < p->length(); i++) { |
| bytes += count_bytes_array(p->at(i)); |
| } |
| bytes += count_bytes_array(p); |
| } |
| return bytes; |
| } |
| |
| void KlassInfoHisto::print_histo_on(outputStream* st, bool print_stats, |
| bool csv_format, const char *columns) { |
| if (print_stats) { |
| print_class_stats(st, csv_format, columns); |
| } else { |
| st->print_cr("%s",title()); |
| print_elements(st); |
| } |
| } |
| |
| class HistoClosure : public KlassInfoClosure { |
| private: |
| KlassInfoHisto* _cih; |
| public: |
| HistoClosure(KlassInfoHisto* cih) : _cih(cih) {} |
| |
| void do_cinfo(KlassInfoEntry* cie) { |
| _cih->add(cie); |
| } |
| }; |
| |
| class RecordInstanceClosure : public ObjectClosure { |
| private: |
| KlassInfoTable* _cit; |
| size_t _missed_count; |
| BoolObjectClosure* _filter; |
| public: |
| RecordInstanceClosure(KlassInfoTable* cit, BoolObjectClosure* filter) : |
| _cit(cit), _missed_count(0), _filter(filter) {} |
| |
| void do_object(oop obj) { |
| if (should_visit(obj)) { |
| if (!_cit->record_instance(obj)) { |
| _missed_count++; |
| } |
| } |
| } |
| |
| size_t missed_count() { return _missed_count; } |
| |
| private: |
| bool should_visit(oop obj) { |
| return _filter == NULL || _filter->do_object_b(obj); |
| } |
| }; |
| |
| size_t HeapInspection::populate_table(KlassInfoTable* cit, BoolObjectClosure *filter) { |
| ResourceMark rm; |
| |
| RecordInstanceClosure ric(cit, filter); |
| Universe::heap()->object_iterate(&ric); |
| return ric.missed_count(); |
| } |
| |
| void HeapInspection::heap_inspection(outputStream* st) { |
| ResourceMark rm; |
| |
| if (_print_help) { |
| for (int c=0; c<KlassSizeStats::_num_columns; c++) { |
| st->print("%s:\n\t", name_table[c]); |
| const int max_col = 60; |
| int col = 0; |
| for (const char *p = help_table[c]; *p; p++,col++) { |
| if (col >= max_col && *p == ' ') { |
| st->print("\n\t"); |
| col = 0; |
| } else { |
| st->print("%c", *p); |
| } |
| } |
| st->print_cr(".\n"); |
| } |
| return; |
| } |
| |
| KlassInfoTable cit(_print_class_stats); |
| if (!cit.allocation_failed()) { |
| size_t missed_count = populate_table(&cit); |
| if (missed_count != 0) { |
| st->print_cr("WARNING: Ran out of C-heap; undercounted " SIZE_FORMAT |
| " total instances in data below", |
| missed_count); |
| } |
| |
| // Sort and print klass instance info |
| const char *title = "\n" |
| " num #instances #bytes class name\n" |
| "----------------------------------------------"; |
| KlassInfoHisto histo(&cit, title); |
| HistoClosure hc(&histo); |
| |
| cit.iterate(&hc); |
| |
| histo.sort(); |
| histo.print_histo_on(st, _print_class_stats, _csv_format, _columns); |
| } else { |
| st->print_cr("WARNING: Ran out of C-heap; histogram not generated"); |
| } |
| st->flush(); |
| } |
| |
| class FindInstanceClosure : public ObjectClosure { |
| private: |
| Klass* _klass; |
| GrowableArray<oop>* _result; |
| |
| public: |
| FindInstanceClosure(Klass* k, GrowableArray<oop>* result) : _klass(k), _result(result) {}; |
| |
| void do_object(oop obj) { |
| if (obj->is_a(_klass)) { |
| _result->append(obj); |
| } |
| } |
| }; |
| |
| void HeapInspection::find_instances_at_safepoint(Klass* k, GrowableArray<oop>* result) { |
| assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped"); |
| assert(Heap_lock->is_locked(), "should have the Heap_lock"); |
| |
| // Ensure that the heap is parsable |
| Universe::heap()->ensure_parsability(false); // no need to retire TALBs |
| |
| // Iterate over objects in the heap |
| FindInstanceClosure fic(k, result); |
| // If this operation encounters a bad object when using CMS, |
| // consider using safe_object_iterate() which avoids metadata |
| // objects that may contain bad references. |
| Universe::heap()->object_iterate(&fic); |
| } |