1 /*
   2  * Copyright (c) 2003, 2007, Oracle and/or its affiliates. All rights reserved.
   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  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 typedef enum oop_type {
  26   unknown_type,
  27   instance_type,
  28   instanceRef_type,
  29   objArray_type,
  30   symbol_type,
  31   klass_type,
  32   instanceKlass_type,
  33   method_type,
  34   constMethod_type,
  35   methodData_type,
  36   constantPool_type,
  37   constantPoolCache_type,
  38   typeArray_type,
  39   compiledICHolder_type,
  40   number_object_types
  41 } object_type;
  42 
  43 
  44 // Classify objects by type and keep counts.
  45 // Print the count and space taken for each type.
  46 
  47 
  48 class ClassifyObjectClosure : public ObjectClosure {
  49 private:
  50 
  51   static const char* object_type_name[number_object_types];
  52 
  53   int total_object_count;
  54   size_t total_object_size;
  55   int object_count[number_object_types];
  56   size_t object_size[number_object_types];
  57 
  58 public:
  59   ClassifyObjectClosure() { reset(); }
  60   void reset();
  61   void do_object(oop obj);
  62   static object_type classify_object(oop obj, bool count);
  63   size_t print();
  64 };
  65 
  66 
  67 // Count objects using the alloc_count field in the object's klass
  68 // object.
  69 
  70 class ClassifyInstanceKlassClosure : public ClassifyObjectClosure {
  71 private:
  72   int total_instances;
  73 public:
  74   ClassifyInstanceKlassClosure() { reset(); }
  75   void reset();
  76   void print();
  77   void do_object(oop obj);
  78 };
  79 
  80 
  81 // Clear the alloc_count fields in all classes so that the count can be
  82 // restarted.
  83 
  84 class ClearAllocCountClosure : public ObjectClosure {
  85 public:
  86   void do_object(oop obj) {
  87     if (obj->is_klass()) {
  88       Klass* k = Klass::cast((klassOop)obj);
  89       k->set_alloc_count(0);
  90     }
  91   }
  92 };