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

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 * 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

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 *

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// A simple allocation profiler for Java. The profiler collects and prints

// the number and total size of instances allocated per class, including

// array classes.

//

// The profiler is currently global for all threads. It can be changed to a

// per threads profiler by keeping a more elaborate data structure and calling

// iterate_since_last_scavenge at thread switches.

class AllocationProfiler: AllStatic {

  friend class GenCollectedHeap;

  friend class G1CollectedHeap;

  friend class MarkSweep;

 private:

  static bool _active;                          // tells whether profiler is active

  static GrowableArray<klassOop>* _print_array; // temporary array for printing

  // Utility printing functions

  static void add_class_to_array(klassOop k);

  static void add_classes_to_array(klassOop k);

  static int  compare_classes(klassOop* k1, klassOop* k2);

  static int  average(size_t alloc_size, int alloc_count);

  static void sort_and_print_array(size_t cutoff);

  // Call for collecting allocation information. Called at scavenge, mark-sweep and disengage.

  static void iterate_since_last_gc();

 public:

  // Start profiler

  static void engage();

  // Stop profiler

  static void disengage();

  // Tells whether profiler is active

  static bool is_active()                   { return _active; }

  // Print profile

  static void print(size_t cutoff);   // Cutoff in total allocation size (in words)

};