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 /*

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  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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  * 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

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 #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"

 #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(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(fields_annotations_bytes, fields_annotations, \

         "Size of field 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_default_annotations_bytes, methods_default_annotations, \

         "Size of methods default annotations") \

     f(type_annotations_bytes, type_annotations, \

         "Size of type 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) ? (x)->size() : 0));

   }

   static int count_array(objArrayOop x) {

     return (HeapWordSize * ((x) ? (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()     { return _next; }

   bool is_equal(Klass* k)  { return k == _klass; }

   Klass* klass()           { return _klass; }

   long count()               { return _instance_count; }

   void set_count(long ct)    { _instance_count = ct; }

   size_t words()             { return _instance_words; }

   void set_words(size_t wds) { _instance_words = wds; }

   void set_index(long index) { _index = index; }

   long index()               { 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* const k);

   void initialize() { _list = NULL; }

   void empty();

   void iterate(KlassInfoClosure* cic);

 };

 class KlassInfoTable: public StackObj {

  private:

   int _size;

   // An aligned reference address (typically the least

   // address in the perm gen) used for hashing klass

   // objects.

   HeapWord* _ref;

   KlassInfoBucket* _buckets;

   uint hash(Klass* p);

   KlassInfoEntry* lookup(Klass* const k); // allocates if not found!

   class AllClassesFinder : public KlassClosure {

     KlassInfoTable *_table;

    public:

     AllClassesFinder(KlassInfoTable* table) : _table(table) {}

     virtual void do_klass(Klass* k);

   };

  public:

   // Table size

   enum {

     cit_size = 20011

   };

   KlassInfoTable(int size, HeapWord* ref, bool need_class_stats);

   ~KlassInfoTable();

   bool record_instance(const oop obj);

   void iterate(KlassInfoClosure* cic);

   bool allocation_failed() { return _buckets == NULL; }

   friend class KlassInfoHisto;

 };

 class KlassInfoHisto : public StackObj {

  private:

   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.

   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);

   }

   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:

   enum {

     histo_initial_size = 1000

   };

   KlassInfoHisto(KlassInfoTable* cit, const char* title,

              int estimatedCount);

   ~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

 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, bool need_prologue) NOT_SERVICES_RETURN;

   static void find_instances_at_safepoint(Klass* k, GrowableArray<oop>* result) NOT_SERVICES_RETURN;

 };

 #endif // SHARE_VM_MEMORY_HEAPINSPECTION_HPP