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src/hotspot/share/gc/shared/collectedHeap.hpp

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  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 #ifndef SHARE_GC_SHARED_COLLECTEDHEAP_HPP
  26 #define SHARE_GC_SHARED_COLLECTEDHEAP_HPP
  27 
  28 #include "gc/shared/gcCause.hpp"
  29 #include "gc/shared/gcWhen.hpp"
  30 #include "gc/shared/verifyOption.hpp"
  31 #include "memory/allocation.hpp"

  32 #include "runtime/handles.hpp"
  33 #include "runtime/perfData.hpp"
  34 #include "runtime/safepoint.hpp"
  35 #include "services/memoryUsage.hpp"
  36 #include "utilities/debug.hpp"
  37 #include "utilities/events.hpp"
  38 #include "utilities/formatBuffer.hpp"
  39 #include "utilities/growableArray.hpp"
  40 
  41 // A "CollectedHeap" is an implementation of a java heap for HotSpot.  This
  42 // is an abstract class: there may be many different kinds of heaps.  This
  43 // class defines the functions that a heap must implement, and contains
  44 // infrastructure common to all heaps.
  45 

  46 class AdaptiveSizePolicy;
  47 class BarrierSet;
  48 class GCHeapSummary;
  49 class GCTimer;
  50 class GCTracer;
  51 class GCMemoryManager;
  52 class MemoryPool;
  53 class MetaspaceSummary;
  54 class ReservedHeapSpace;
  55 class SoftRefPolicy;
  56 class Thread;
  57 class ThreadClosure;
  58 class VirtualSpaceSummary;
  59 class WorkGang;
  60 class nmethod;
  61 
  62 class GCMessage : public FormatBuffer<1024> {
  63  public:
  64   bool is_before;
  65 


 368 
 369   // Increment total number of GC collections (started)
 370   void increment_total_collections(bool full = false) {
 371     _total_collections++;
 372     if (full) {
 373       increment_total_full_collections();
 374     }
 375   }
 376 
 377   void increment_total_full_collections() { _total_full_collections++; }
 378 
 379   // Return the SoftRefPolicy for the heap;
 380   virtual SoftRefPolicy* soft_ref_policy() = 0;
 381 
 382   virtual MemoryUsage memory_usage();
 383   virtual GrowableArray<GCMemoryManager*> memory_managers() = 0;
 384   virtual GrowableArray<MemoryPool*> memory_pools() = 0;
 385 
 386   // Iterate over all objects, calling "cl.do_object" on each.
 387   virtual void object_iterate(ObjectClosure* cl) = 0;













 388 
 389   // Keep alive an object that was loaded with AS_NO_KEEPALIVE.
 390   virtual void keep_alive(oop obj) {}
 391 
 392   // Returns the longest time (in ms) that has elapsed since the last
 393   // time that any part of the heap was examined by a garbage collection.
 394   virtual jlong millis_since_last_gc() = 0;
 395 
 396   // Perform any cleanup actions necessary before allowing a verification.
 397   virtual void prepare_for_verify() = 0;
 398 
 399   // Generate any dumps preceding or following a full gc
 400  private:
 401   void full_gc_dump(GCTimer* timer, bool before);
 402 
 403   virtual void initialize_serviceability() = 0;
 404 
 405  public:
 406   void pre_full_gc_dump(GCTimer* timer);
 407   void post_full_gc_dump(GCTimer* timer);




  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 #ifndef SHARE_GC_SHARED_COLLECTEDHEAP_HPP
  26 #define SHARE_GC_SHARED_COLLECTEDHEAP_HPP
  27 
  28 #include "gc/shared/gcCause.hpp"
  29 #include "gc/shared/gcWhen.hpp"
  30 #include "gc/shared/verifyOption.hpp"
  31 #include "memory/allocation.hpp"
  32 #include "memory/heapInspection.hpp"
  33 #include "runtime/handles.hpp"
  34 #include "runtime/perfData.hpp"
  35 #include "runtime/safepoint.hpp"
  36 #include "services/memoryUsage.hpp"
  37 #include "utilities/debug.hpp"
  38 #include "utilities/events.hpp"
  39 #include "utilities/formatBuffer.hpp"
  40 #include "utilities/growableArray.hpp"
  41 
  42 // A "CollectedHeap" is an implementation of a java heap for HotSpot.  This
  43 // is an abstract class: there may be many different kinds of heaps.  This
  44 // class defines the functions that a heap must implement, and contains
  45 // infrastructure common to all heaps.
  46 
  47 class AbstractGangTask;
  48 class AdaptiveSizePolicy;
  49 class BarrierSet;
  50 class GCHeapSummary;
  51 class GCTimer;
  52 class GCTracer;
  53 class GCMemoryManager;
  54 class MemoryPool;
  55 class MetaspaceSummary;
  56 class ReservedHeapSpace;
  57 class SoftRefPolicy;
  58 class Thread;
  59 class ThreadClosure;
  60 class VirtualSpaceSummary;
  61 class WorkGang;
  62 class nmethod;
  63 
  64 class GCMessage : public FormatBuffer<1024> {
  65  public:
  66   bool is_before;
  67 


 370 
 371   // Increment total number of GC collections (started)
 372   void increment_total_collections(bool full = false) {
 373     _total_collections++;
 374     if (full) {
 375       increment_total_full_collections();
 376     }
 377   }
 378 
 379   void increment_total_full_collections() { _total_full_collections++; }
 380 
 381   // Return the SoftRefPolicy for the heap;
 382   virtual SoftRefPolicy* soft_ref_policy() = 0;
 383 
 384   virtual MemoryUsage memory_usage();
 385   virtual GrowableArray<GCMemoryManager*> memory_managers() = 0;
 386   virtual GrowableArray<MemoryPool*> memory_pools() = 0;
 387 
 388   // Iterate over all objects, calling "cl.do_object" on each.
 389   virtual void object_iterate(ObjectClosure* cl) = 0;
 390 
 391   // Run parallel heap inspection, return false as not supported by heap.
 392   virtual bool run_par_heap_inspect_task(KlassInfoTable* cit,
 393                                          BoolObjectClosure* filter,
 394                                          size_t* missed_count,
 395                                          size_t thread_num) {
 396     return false;
 397   }
 398 
 399   // Parallel iterate over all objects, reture false if heap not support.
 400   virtual bool object_iterate_try_parallel(AbstractGangTask *task, size_t thread_num) {
 401     return false;
 402   }
 403 
 404   // Keep alive an object that was loaded with AS_NO_KEEPALIVE.
 405   virtual void keep_alive(oop obj) {}
 406 
 407   // Returns the longest time (in ms) that has elapsed since the last
 408   // time that any part of the heap was examined by a garbage collection.
 409   virtual jlong millis_since_last_gc() = 0;
 410 
 411   // Perform any cleanup actions necessary before allowing a verification.
 412   virtual void prepare_for_verify() = 0;
 413 
 414   // Generate any dumps preceding or following a full gc
 415  private:
 416   void full_gc_dump(GCTimer* timer, bool before);
 417 
 418   virtual void initialize_serviceability() = 0;
 419 
 420  public:
 421   void pre_full_gc_dump(GCTimer* timer);
 422   void post_full_gc_dump(GCTimer* timer);


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