Mercurial > hg > graal-jvmci-8
view src/share/vm/memory/heapInspection.hpp @ 20304:a22acf6d7598
8048112: G1 Full GC needs to support the case when the very first region is not available
Summary: Refactor preparation for compaction during Full GC so that it lazily initializes the first compaction point. This also avoids problems later when the first region may not be committed. Also reviewed by K. Barrett.
Reviewed-by: brutisso
author | tschatzl |
---|---|
date | Mon, 21 Jul 2014 10:00:31 +0200 |
parents | 78bbf4d43a14 |
children | 52b4284cb496 |
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/* * 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. * */ #ifndef SHARE_VM_MEMORY_HEAPINSPECTION_HPP #define SHARE_VM_MEMORY_HEAPINSPECTION_HPP #include "memory/allocation.inline.hpp" #include "oops/oop.inline.hpp" #include "oops/annotations.hpp" #include "utilities/macros.hpp" #if INCLUDE_SERVICES // HeapInspection // KlassInfoTable is a bucket hash table that // maps Klass*s to extra information: // instance count and instance word size. // // A KlassInfoBucket is the head of a link list // of KlassInfoEntry's // // KlassInfoHisto is a growable array of pointers // to KlassInfoEntry's and is used to sort // the entries. #define HEAP_INSPECTION_COLUMNS_DO(f) \ f(inst_size, InstSize, \ "Size of each object instance of the Java class") \ f(inst_count, InstCount, \ "Number of object instances of the Java class") \ f(inst_bytes, InstBytes, \ "This is usually (InstSize * InstNum). The only exception is " \ "java.lang.Class, whose InstBytes also includes the slots " \ "used to store static fields. InstBytes is not counted in " \ "ROAll, RWAll or Total") \ f(mirror_bytes, Mirror, \ "Size of the Klass::java_mirror() object") \ f(klass_bytes, KlassBytes, \ "Size of the InstanceKlass or ArrayKlass for this class. " \ "Note that this includes VTab, ITab, OopMap") \ f(secondary_supers_bytes, K_secondary_supers, \ "Number of bytes used by the Klass::secondary_supers() array") \ f(vtab_bytes, VTab, \ "Size of the embedded vtable in InstanceKlass") \ f(itab_bytes, ITab, \ "Size of the embedded itable in InstanceKlass") \ f(nonstatic_oopmap_bytes, OopMap, \ "Size of the embedded nonstatic_oop_map in InstanceKlass") \ f(methods_array_bytes, IK_methods, \ "Number of bytes used by the InstanceKlass::methods() array") \ f(method_ordering_bytes, IK_method_ordering, \ "Number of bytes used by the InstanceKlass::method_ordering() array") \ f(default_methods_array_bytes, IK_default_methods, \ "Number of bytes used by the InstanceKlass::default_methods() array") \ f(default_vtable_indices_bytes, IK_default_vtable_indices, \ "Number of bytes used by the InstanceKlass::default_vtable_indices() array") \ f(local_interfaces_bytes, IK_local_interfaces, \ "Number of bytes used by the InstanceKlass::local_interfaces() array") \ f(transitive_interfaces_bytes, IK_transitive_interfaces, \ "Number of bytes used by the InstanceKlass::transitive_interfaces() array") \ f(fields_bytes, IK_fields, \ "Number of bytes used by the InstanceKlass::fields() array") \ f(inner_classes_bytes, IK_inner_classes, \ "Number of bytes used by the InstanceKlass::inner_classes() array") \ f(signers_bytes, IK_signers, \ "Number of bytes used by the InstanceKlass::singers() array") \ f(class_annotations_bytes, class_annotations, \ "Size of class annotations") \ f(class_type_annotations_bytes, class_type_annotations, \ "Size of class type annotations") \ f(fields_annotations_bytes, fields_annotations, \ "Size of field annotations") \ f(fields_type_annotations_bytes, fields_type_annotations, \ "Size of field type annotations") \ f(methods_annotations_bytes, methods_annotations, \ "Size of method annotations") \ f(methods_parameter_annotations_bytes, methods_parameter_annotations, \ "Size of method parameter annotations") \ f(methods_type_annotations_bytes, methods_type_annotations, \ "Size of methods type annotations") \ f(methods_default_annotations_bytes, methods_default_annotations, \ "Size of methods default annotations") \ f(annotations_bytes, annotations, \ "Size of all annotations") \ f(cp_bytes, Cp, \ "Size of InstanceKlass::constants()") \ f(cp_tags_bytes, CpTags, \ "Size of InstanceKlass::constants()->tags()") \ f(cp_cache_bytes, CpCache, \ "Size of InstanceKlass::constants()->cache()") \ f(cp_operands_bytes, CpOperands, \ "Size of InstanceKlass::constants()->operands()") \ f(cp_refmap_bytes, CpRefMap, \ "Size of InstanceKlass::constants()->reference_map()") \ f(cp_all_bytes, CpAll, \ "Sum of Cp + CpTags + CpCache + CpOperands + CpRefMap") \ f(method_count, MethodCount, \ "Number of methods in this class") \ f(method_bytes, MethodBytes, \ "Size of the Method object") \ f(const_method_bytes, ConstMethod, \ "Size of the ConstMethod object") \ f(method_data_bytes, MethodData, \ "Size of the MethodData object") \ f(stackmap_bytes, StackMap, \ "Size of the stackmap_data") \ f(bytecode_bytes, Bytecodes, \ "Of the MethodBytes column, how much are the space taken up by bytecodes") \ f(method_all_bytes, MethodAll, \ "Sum of MethodBytes + Constmethod + Stackmap + Methoddata") \ f(ro_bytes, ROAll, \ "Size of all class meta data that could (potentially) be placed " \ "in read-only memory. (This could change with CDS design)") \ f(rw_bytes, RWAll, \ "Size of all class meta data that must be placed in read/write " \ "memory. (This could change with CDS design) ") \ f(total_bytes, Total, \ "ROAll + RWAll. Note that this does NOT include InstBytes.") // Size statistics for a Klass - filled in by Klass::collect_statistics() class KlassSizeStats { public: #define COUNT_KLASS_SIZE_STATS_FIELD(field, name, help) _index_ ## field, #define DECLARE_KLASS_SIZE_STATS_FIELD(field, name, help) julong _ ## field; enum { HEAP_INSPECTION_COLUMNS_DO(COUNT_KLASS_SIZE_STATS_FIELD) _num_columns }; HEAP_INSPECTION_COLUMNS_DO(DECLARE_KLASS_SIZE_STATS_FIELD) static int count(oop x) { return (HeapWordSize * (((x) != NULL) ? (x)->size() : 0)); } static int count_array(objArrayOop x) { return (HeapWordSize * (((x) != NULL) ? (x)->size() : 0)); } template <class T> static int count(T* x) { return (HeapWordSize * ((x) ? (x)->size() : 0)); } template <class T> static int count_array(T* x) { if (x == NULL) { return 0; } if (x->length() == 0) { // This is a shared array, e.g., Universe::the_empty_int_array(). Don't // count it to avoid double-counting. return 0; } return HeapWordSize * x->size(); } }; class KlassInfoEntry: public CHeapObj<mtInternal> { private: KlassInfoEntry* _next; Klass* _klass; long _instance_count; size_t _instance_words; long _index; public: KlassInfoEntry(Klass* k, KlassInfoEntry* next) : _klass(k), _instance_count(0), _instance_words(0), _next(next), _index(-1) {} KlassInfoEntry* next() const { return _next; } bool is_equal(const Klass* k) { return k == _klass; } Klass* klass() const { return _klass; } long count() const { return _instance_count; } void set_count(long ct) { _instance_count = ct; } size_t words() const { return _instance_words; } void set_words(size_t wds) { _instance_words = wds; } void set_index(long index) { _index = index; } long index() const { return _index; } int compare(KlassInfoEntry* e1, KlassInfoEntry* e2); void print_on(outputStream* st) const; const char* name() const; }; class KlassInfoClosure : public StackObj { public: // Called for each KlassInfoEntry. virtual void do_cinfo(KlassInfoEntry* cie) = 0; }; class KlassInfoBucket: public CHeapObj<mtInternal> { private: KlassInfoEntry* _list; KlassInfoEntry* list() { return _list; } void set_list(KlassInfoEntry* l) { _list = l; } public: KlassInfoEntry* lookup(Klass* k); void initialize() { _list = NULL; } void empty(); void iterate(KlassInfoClosure* cic); }; class KlassInfoTable: public StackObj { private: int _size; static const int _num_buckets = 20011; size_t _size_of_instances_in_words; // An aligned reference address (typically the least // address in the perm gen) used for hashing klass // objects. HeapWord* _ref; KlassInfoBucket* _buckets; uint hash(const Klass* p); KlassInfoEntry* lookup(Klass* k); // allocates if not found! class AllClassesFinder : public KlassClosure { KlassInfoTable *_table; public: AllClassesFinder(KlassInfoTable* table) : _table(table) {} virtual void do_klass(Klass* k); }; public: KlassInfoTable(bool need_class_stats); ~KlassInfoTable(); bool record_instance(const oop obj); void iterate(KlassInfoClosure* cic); bool allocation_failed() { return _buckets == NULL; } size_t size_of_instances_in_words() const; friend class KlassInfoHisto; }; class KlassInfoHisto : public StackObj { private: static const int _histo_initial_size = 1000; KlassInfoTable *_cit; GrowableArray<KlassInfoEntry*>* _elements; GrowableArray<KlassInfoEntry*>* elements() const { return _elements; } const char* _title; const char* title() const { return _title; } static int sort_helper(KlassInfoEntry** e1, KlassInfoEntry** e2); void print_elements(outputStream* st) const; void print_class_stats(outputStream* st, bool csv_format, const char *columns); julong annotations_bytes(Array<AnnotationArray*>* p) const; const char *_selected_columns; bool is_selected(const char *col_name); void print_title(outputStream* st, bool csv_format, bool selected_columns_table[], int width_table[], const char *name_table[]); template <class T> static int count_bytes(T* x) { return (HeapWordSize * ((x) ? (x)->size() : 0)); } template <class T> static int count_bytes_array(T* x) { if (x == NULL) { return 0; } if (x->length() == 0) { // This is a shared array, e.g., Universe::the_empty_int_array(). Don't // count it to avoid double-counting. return 0; } return HeapWordSize * x->size(); } // returns a format string to print a julong with the given width. E.g, // printf(num_fmt(6), julong(10)) would print out the number 10 with 4 // leading spaces. PRAGMA_DIAG_PUSH PRAGMA_FORMAT_NONLITERAL_IGNORED static void print_julong(outputStream* st, int width, julong n) { int num_spaces = width - julong_width(n); if (num_spaces > 0) { st->print(str_fmt(num_spaces), ""); } st->print(JULONG_FORMAT, n); } PRAGMA_DIAG_POP static char* perc_fmt(int width) { static char buf[32]; jio_snprintf(buf, sizeof(buf), "%%%d.1f%%%%", width-1); return buf; } static char* str_fmt(int width) { static char buf[32]; jio_snprintf(buf, sizeof(buf), "%%%ds", width); return buf; } static int julong_width(julong n) { if (n == 0) { return 1; } int w = 0; while (n > 0) { n /= 10; w += 1; } return w; } static int col_width(julong n, const char *name) { int w = julong_width(n); int min = (int)(strlen(name)); if (w < min) { w = min; } // add a leading space for separation. return w + 1; } public: KlassInfoHisto(KlassInfoTable* cit, const char* title); ~KlassInfoHisto(); void add(KlassInfoEntry* cie); void print_histo_on(outputStream* st, bool print_class_stats, bool csv_format, const char *columns); void sort(); }; #endif // INCLUDE_SERVICES // These declarations are needed since teh declaration of KlassInfoTable and // KlassInfoClosure are guarded by #if INLCUDE_SERVICES class KlassInfoTable; class KlassInfoClosure; class HeapInspection : public StackObj { bool _csv_format; // "comma separated values" format for spreadsheet. bool _print_help; bool _print_class_stats; const char* _columns; public: HeapInspection(bool csv_format, bool print_help, bool print_class_stats, const char *columns) : _csv_format(csv_format), _print_help(print_help), _print_class_stats(print_class_stats), _columns(columns) {} void heap_inspection(outputStream* st) NOT_SERVICES_RETURN; size_t populate_table(KlassInfoTable* cit, BoolObjectClosure* filter = NULL) NOT_SERVICES_RETURN; static void find_instances_at_safepoint(Klass* k, GrowableArray<oop>* result) NOT_SERVICES_RETURN; private: void iterate_over_heap(KlassInfoTable* cit, BoolObjectClosure* filter = NULL); }; #endif // SHARE_VM_MEMORY_HEAPINSPECTION_HPP