jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/parallelScavenge/psOldGen.hpp@92ef81e2f571 (annotated)

src/share/vm/gc_implementation/parallelScavenge/psOldGen.hpp@92ef81e2f571 (annotated)

src/share/vm/gc_implementation/parallelScavenge/psOldGen.hpp

Fri, 10 May 2013 08:27:30 -0700

author: minqi
date: Fri, 10 May 2013 08:27:30 -0700
changeset 5097: 92ef81e2f571
parent 4037: da91efe96a93
child 5311: f99cd6e20ab1
permissions: -rw-r--r--

8003557: NPG: Klass* const k should be const Klass* k.
Summary: With NPG, const KlassOop klass which is in fact a definition converted to Klass* const, which is not the original intention. The right usage is converting them to const Klass*.
Reviewed-by: coleenp, kvn
Contributed-by: yumin.qi@oracle.com

 /*
  * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * 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
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSOLDGEN_HPP
 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSOLDGEN_HPP
 #include "gc_implementation/parallelScavenge/objectStartArray.hpp"
 #include "gc_implementation/parallelScavenge/psGenerationCounters.hpp"
 #include "gc_implementation/parallelScavenge/psVirtualspace.hpp"
 #include "gc_implementation/shared/mutableSpace.hpp"
 #include "gc_implementation/shared/spaceCounters.hpp"
 #include "runtime/safepoint.hpp"
 class PSMarkSweepDecorator;
 class PSOldGen : public CHeapObj<mtGC> {
   friend class VMStructs;
   friend class PSPromotionManager; // Uses the cas_allocate methods
   friend class ParallelScavengeHeap;
   friend class AdjoiningGenerations;
  protected:
   MemRegion                _reserved;          // Used for simple containment tests
   PSVirtualSpace*          _virtual_space;     // Controls mapping and unmapping of virtual mem
   ObjectStartArray         _start_array;       // Keeps track of where objects start in a 512b block
   MutableSpace*            _object_space;      // Where all the objects live
   PSMarkSweepDecorator*    _object_mark_sweep; // The mark sweep view of _object_space
   const char* const        _name;              // Name of this generation.
   // Performance Counters
   PSGenerationCounters*    _gen_counters;
   SpaceCounters*           _space_counters;
   // Sizing information, in bytes, set in constructor
   const size_t _init_gen_size;
   const size_t _min_gen_size;
   const size_t _max_gen_size;
   // Used when initializing the _name field.
   static inline const char* select_name();
   HeapWord* allocate_noexpand(size_t word_size) {
     // We assume the heap lock is held here.
     assert_locked_or_safepoint(Heap_lock);
     HeapWord* res = object_space()->allocate(word_size);
     if (res != NULL) {
       _start_array.allocate_block(res);
     }
     return res;
   }
   // Support for MT garbage collection. CAS allocation is lower overhead than grabbing
   // and releasing the heap lock, which is held during gc's anyway. This method is not
   // safe for use at the same time as allocate_noexpand()!
   HeapWord* cas_allocate_noexpand(size_t word_size) {
     assert(SafepointSynchronize::is_at_safepoint(), "Must only be called at safepoint");
     HeapWord* res = object_space()->cas_allocate(word_size);
     if (res != NULL) {
       _start_array.allocate_block(res);
     }
     return res;
   }
   // Support for MT garbage collection. See above comment.
   HeapWord* cas_allocate(size_t word_size) {
     HeapWord* res = cas_allocate_noexpand(word_size);
     return (res == NULL) ? expand_and_cas_allocate(word_size) : res;
   }
   HeapWord* expand_and_allocate(size_t word_size);
   HeapWord* expand_and_cas_allocate(size_t word_size);
   void expand(size_t bytes);
   bool expand_by(size_t bytes);
   bool expand_to_reserved();
   void shrink(size_t bytes);
   void post_resize();
  public:
   // Initialize the generation.
   PSOldGen(ReservedSpace rs, size_t alignment,
            size_t initial_size, size_t min_size, size_t max_size,
            const char* perf_data_name, int level);
   PSOldGen(size_t initial_size, size_t min_size, size_t max_size,
            const char* perf_data_name, int level);
   virtual void initialize(ReservedSpace rs, size_t alignment,
                   const char* perf_data_name, int level);
   void initialize_virtual_space(ReservedSpace rs, size_t alignment);
   void initialize_work(const char* perf_data_name, int level);
   virtual void initialize_performance_counters(const char* perf_data_name, int level);
   MemRegion reserved() const                { return _reserved; }
   virtual size_t max_gen_size()             { return _max_gen_size; }
   size_t min_gen_size()                     { return _min_gen_size; }
   // Returns limit on the maximum size of the generation.  This
   // is the same as _max_gen_size for PSOldGen but need not be
   // for a derived class.
   virtual size_t gen_size_limit();
   bool is_in(const void* p) const           {
     return _virtual_space->contains((void *)p);
   }
   bool is_in_reserved(const void* p) const {
     return reserved().contains(p);
   }
   MutableSpace*         object_space() const      { return _object_space; }
   PSMarkSweepDecorator* object_mark_sweep() const { return _object_mark_sweep; }
   ObjectStartArray*     start_array()             { return &_start_array; }
   PSVirtualSpace*       virtual_space() const     { return _virtual_space;}
   // Has the generation been successfully allocated?
   bool is_allocated();
   // MarkSweep methods
   virtual void precompact();
   void adjust_pointers();
   void compact();
   // Size info
   size_t capacity_in_bytes() const        { return object_space()->capacity_in_bytes(); }
   size_t used_in_bytes() const            { return object_space()->used_in_bytes(); }
   size_t free_in_bytes() const            { return object_space()->free_in_bytes(); }
   size_t capacity_in_words() const        { return object_space()->capacity_in_words(); }
   size_t used_in_words() const            { return object_space()->used_in_words(); }
   size_t free_in_words() const            { return object_space()->free_in_words(); }
   // Includes uncommitted memory
   size_t contiguous_available() const;
   bool is_maximal_no_gc() const {
     return virtual_space()->uncommitted_size() == 0;
   }
   // Calculating new sizes
   void resize(size_t desired_free_space);
   // Allocation. We report all successful allocations to the size policy
   // Note that the perm gen does not use this method, and should not!
   HeapWord* allocate(size_t word_size);
   // Iteration.
   void oop_iterate_no_header(OopClosure* cl) { object_space()->oop_iterate_no_header(cl); }
   void object_iterate(ObjectClosure* cl) { object_space()->object_iterate(cl); }
   // Debugging - do not use for time critical operations
   virtual void print() const;
   virtual void print_on(outputStream* st) const;
   void print_used_change(size_t prev_used) const;
   void verify();
   void verify_object_start_array();
   // These should not used
   virtual void reset_after_change();
   // These should not used
   virtual size_t available_for_expansion();
   virtual size_t available_for_contraction();
   void space_invariants() PRODUCT_RETURN;
   // Performace Counter support
   void update_counters();
   // Printing support
   virtual const char* name() const { return _name; }
   // Debugging support
   // Save the tops of all spaces for later use during mangling.
   void record_spaces_top() PRODUCT_RETURN;
 };
 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSOLDGEN_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/parallelScavenge/psOldGen.hpp@92ef81e2f571 (annotated)

src/share/vm/gc_implementation/parallelScavenge/psOldGen.hpp