src/share/vm/runtime/sweeper.hpp

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rev 5062 : fix nmethod unregister synchronization


  66   static jlong     _total_disconnect_time;        // Total time cleaning code mem
  67   static jlong     _peak_disconnect_time;         // Peak time cleaning code mem
  68 
  69   static void process_nmethod(nmethod *nm);
  70   static void release_nmethod(nmethod* nm);
  71 
  72   static void log_sweep(const char* msg, const char* format = NULL, ...);
  73   static bool sweep_in_progress();
  74 
  75  public:
  76   static long traversal_count()              { return _traversals; }
  77   static int  number_of_flushes()            { return _number_of_flushes; }
  78   static int  total_nof_methods_reclaimed()  { return _total_nof_methods_reclaimed; }
  79   static jlong total_time_sweeping()         { return _total_time_sweeping; }
  80   static jlong peak_sweep_time()             { return _peak_sweep_time; }
  81   static jlong peak_sweep_fraction_time()    { return _peak_sweep_fraction_time; }
  82   static jlong total_disconnect_time()       { return _total_disconnect_time; }
  83   static jlong peak_disconnect_time()        { return _peak_disconnect_time; }
  84 
  85 #ifdef ASSERT

  86   // Keep track of sweeper activity in the ring buffer
  87   static void record_sweep(nmethod* nm, int line);
  88   static void report_events(int id, address entry);
  89   static void report_events();
  90 #endif
  91 
  92   static void scan_stacks();      // Invoked at the end of each safepoint
  93   static void sweep_code_cache(); // Concurrent part of sweep job
  94   static void possibly_sweep();   // Compiler threads call this to sweep
  95 
  96   static void notify(nmethod* nm) {
  97     // Request a new sweep of the code cache from the beginning. No
  98     // need to synchronize the setting of this flag since it only
  99     // changes to false at safepoint so we can never overwrite it with false.
 100      _resweep = true;
 101   }
 102 
 103   static void handle_full_code_cache(bool is_full); // Called by compilers who fail to allocate
 104   static void speculative_disconnect_nmethods(bool was_full);   // Called by vm op to deal with alloc failure
 105 };


  66   static jlong     _total_disconnect_time;        // Total time cleaning code mem
  67   static jlong     _peak_disconnect_time;         // Peak time cleaning code mem
  68 
  69   static void process_nmethod(nmethod *nm);
  70   static void release_nmethod(nmethod* nm);
  71 
  72   static void log_sweep(const char* msg, const char* format = NULL, ...);
  73   static bool sweep_in_progress();
  74 
  75  public:
  76   static long traversal_count()              { return _traversals; }
  77   static int  number_of_flushes()            { return _number_of_flushes; }
  78   static int  total_nof_methods_reclaimed()  { return _total_nof_methods_reclaimed; }
  79   static jlong total_time_sweeping()         { return _total_time_sweeping; }
  80   static jlong peak_sweep_time()             { return _peak_sweep_time; }
  81   static jlong peak_sweep_fraction_time()    { return _peak_sweep_fraction_time; }
  82   static jlong total_disconnect_time()       { return _total_disconnect_time; }
  83   static jlong peak_disconnect_time()        { return _peak_disconnect_time; }
  84 
  85 #ifdef ASSERT
  86   static bool is_sweeping(nmethod* which) { return _current == which; }
  87   // Keep track of sweeper activity in the ring buffer
  88   static void record_sweep(nmethod* nm, int line);
  89   static void report_events(int id, address entry);
  90   static void report_events();
  91 #endif
  92 
  93   static void scan_stacks();      // Invoked at the end of each safepoint
  94   static void sweep_code_cache(); // Concurrent part of sweep job
  95   static void possibly_sweep();   // Compiler threads call this to sweep
  96 
  97   static void notify(nmethod* nm) {
  98     // Request a new sweep of the code cache from the beginning. No
  99     // need to synchronize the setting of this flag since it only
 100     // changes to false at safepoint so we can never overwrite it with false.
 101      _resweep = true;
 102   }
 103 
 104   static void handle_full_code_cache(bool is_full); // Called by compilers who fail to allocate
 105   static void speculative_disconnect_nmethods(bool was_full);   // Called by vm op to deal with alloc failure
 106 };