jdk8-mips64-public/hotspot: src/share/vm/memory/heapInspection.hpp@6e0cb14ce59b (annotated)

src/share/vm/memory/heapInspection.hpp@6e0cb14ce59b (annotated)

src/share/vm/memory/heapInspection.hpp

Thu, 21 Aug 2014 13:57:51 -0700

author: iklam
date: Thu, 21 Aug 2014 13:57:51 -0700
changeset 7089: 6e0cb14ce59b
parent 6680: 78bbf4d43a14
child 6876: 710a3c8b516e
permissions: -rw-r--r--

8046070: Class Data Sharing clean up and refactoring
Summary: Cleaned up CDS to be more configurable, maintainable and extensible
Reviewed-by: dholmes, coleenp, acorn, mchung

 /*
  * 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

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/memory/heapInspection.hpp@6e0cb14ce59b (annotated)

src/share/vm/memory/heapInspection.hpp