leakProfiler.hpp

/*
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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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 * 2 along with this work; if not, write to the Free Software Foundation,
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#ifndef SHARE_VM_JFR_LEAKPROFILER_LEAKPROFILER_HPP
#define SHARE_VM_JFR_LEAKPROFILER_LEAKPROFILER_HPP

#include "memory/allocation.hpp"

class BoolObjectClosure;
class ObjectSampler;
class OopClosure;
class Thread;

class LeakProfiler : public AllStatic {
  friend class ClassUnloadTypeSet;
  friend class EmitEventOperation;
  friend class ObjectSampleCheckpoint;
  friend class StartOperation;
  friend class StopOperation;
  friend class TypeSet;
  friend class WriteObjectSampleStacktrace;

 private:
  static ObjectSampler* _object_sampler;

  static void set_object_sampler(ObjectSampler* object_sampler);
  static ObjectSampler* object_sampler();

  static void suspend();
  static void resume();
  static bool is_suspended();

 public:
  static bool start(jint sample_count);
  static bool stop();
  static void emit_events(jlong cutoff_ticks, bool emit_all);
  static bool is_running();

  static void sample(HeapWord* object, size_t size, JavaThread* thread);

  // Called by GC
  static void oops_do(BoolObjectClosure* is_alive, OopClosure* f);
};

#endif // SHARE_VM_JFR_LEAKPROFILER_LEAKPROFILER_HPP