jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.hpp@c18cbe5936b8 (annotated)

src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.hpp@c18cbe5936b8 (annotated)

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

Thu, 27 May 2010 19:08:38 -0700

author: trims
date: Thu, 27 May 2010 19:08:38 -0700
changeset 1907: c18cbe5936b8
parent 1822: 0bfd3fb24150
child 2314: f95d63e2154a
permissions: -rw-r--r--

6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair

 /*
  * Copyright (c) 2001, 2010, 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.
  *
  */
 class AdjoiningGenerations;
 class GCTaskManager;
 class PSAdaptiveSizePolicy;
 class GenerationSizer;
 class CollectorPolicy;
 class ParallelScavengeHeap : public CollectedHeap {
   friend class VMStructs;
  private:
   static PSYoungGen* _young_gen;
   static PSOldGen*   _old_gen;
   static PSPermGen*  _perm_gen;
   // Sizing policy for entire heap
   static PSAdaptiveSizePolicy* _size_policy;
   static PSGCAdaptivePolicyCounters*   _gc_policy_counters;
   static ParallelScavengeHeap* _psh;
   size_t _perm_gen_alignment;
   size_t _young_gen_alignment;
   size_t _old_gen_alignment;
   GenerationSizer* _collector_policy;
   inline size_t set_alignment(size_t& var, size_t val);
   // Collection of generations that are adjacent in the
   // space reserved for the heap.
   AdjoiningGenerations* _gens;
   static GCTaskManager*          _gc_task_manager;      // The task manager.
  protected:
   static inline size_t total_invocations();
   HeapWord* allocate_new_tlab(size_t size);
  public:
   ParallelScavengeHeap() : CollectedHeap() {
     set_alignment(_perm_gen_alignment, intra_heap_alignment());
     set_alignment(_young_gen_alignment, intra_heap_alignment());
     set_alignment(_old_gen_alignment, intra_heap_alignment());
   }
   // For use by VM operations
   enum CollectionType {
     Scavenge,
     MarkSweep
   };
   ParallelScavengeHeap::Name kind() const {
     return CollectedHeap::ParallelScavengeHeap;
   }
 CollectorPolicy* collector_policy() const { return (CollectorPolicy*) _collector_policy; }
   // GenerationSizer* collector_policy() const { return _collector_policy; }
   static PSYoungGen* young_gen()     { return _young_gen; }
   static PSOldGen* old_gen()         { return _old_gen; }
   static PSPermGen* perm_gen()       { return _perm_gen; }
   virtual PSAdaptiveSizePolicy* size_policy() { return _size_policy; }
   static PSGCAdaptivePolicyCounters* gc_policy_counters() { return _gc_policy_counters; }
   static ParallelScavengeHeap* heap();
   static GCTaskManager* const gc_task_manager() { return _gc_task_manager; }
   AdjoiningGenerations* gens() { return _gens; }
   // Returns JNI_OK on success
   virtual jint initialize();
   void post_initialize();
   void update_counters();
   // The alignment used for the various generations.
   size_t perm_gen_alignment()  const { return _perm_gen_alignment; }
   size_t young_gen_alignment() const { return _young_gen_alignment; }
   size_t old_gen_alignment()  const { return _old_gen_alignment; }
   // The alignment used for eden and survivors within the young gen
   // and for boundary between young gen and old gen.
   size_t intra_heap_alignment() const { return 64 * K; }
   size_t capacity() const;
   size_t used() const;
   // Return "true" if all generations (but perm) have reached the
   // maximal committed limit that they can reach, without a garbage
   // collection.
   virtual bool is_maximal_no_gc() const;
   // Does this heap support heap inspection? (+PrintClassHistogram)
   bool supports_heap_inspection() const { return true; }
   size_t permanent_capacity() const;
   size_t permanent_used() const;
   size_t max_capacity() const;
   // Whether p is in the allocated part of the heap
   bool is_in(const void* p) const;
   bool is_in_reserved(const void* p) const;
   bool is_in_permanent(const void *p) const {    // reserved part
     return perm_gen()->reserved().contains(p);
   }
   bool is_permanent(const void *p) const {    // committed part
     return perm_gen()->is_in(p);
   }
   inline bool is_in_young(oop p);        // reserved part
   inline bool is_in_old_or_perm(oop p);  // reserved part
   // Memory allocation.   "gc_time_limit_was_exceeded" will
   // be set to true if the adaptive size policy determine that
   // an excessive amount of time is being spent doing collections
   // and caused a NULL to be returned.  If a NULL is not returned,
   // "gc_time_limit_was_exceeded" has an undefined meaning.
   HeapWord* mem_allocate(size_t size,
                          bool is_noref,
                          bool is_tlab,
                          bool* gc_overhead_limit_was_exceeded);
   HeapWord* failed_mem_allocate(size_t size, bool is_tlab);
   HeapWord* permanent_mem_allocate(size_t size);
   HeapWord* failed_permanent_mem_allocate(size_t size);
   // Support for System.gc()
   void collect(GCCause::Cause cause);
   // This interface assumes that it's being called by the
   // vm thread. It collects the heap assuming that the
   // heap lock is already held and that we are executing in
   // the context of the vm thread.
   void collect_as_vm_thread(GCCause::Cause cause);
   // These also should be called by the vm thread at a safepoint (e.g., from a
   // VM operation).
   //
   // The first collects the young generation only, unless the scavenge fails; it
   // will then attempt a full gc.  The second collects the entire heap; if
   // maximum_compaction is true, it will compact everything and clear all soft
   // references.
   inline void invoke_scavenge();
   inline void invoke_full_gc(bool maximum_compaction);
   size_t large_typearray_limit() { return FastAllocateSizeLimit; }
   bool supports_inline_contig_alloc() const { return !UseNUMA; }
   HeapWord** top_addr() const { return !UseNUMA ? young_gen()->top_addr() : (HeapWord**)-1; }
   HeapWord** end_addr() const { return !UseNUMA ? young_gen()->end_addr() : (HeapWord**)-1; }
   void ensure_parsability(bool retire_tlabs);
   void accumulate_statistics_all_tlabs();
   void resize_all_tlabs();
   size_t unsafe_max_alloc();
   bool supports_tlab_allocation() const { return true; }
   size_t tlab_capacity(Thread* thr) const;
   size_t unsafe_max_tlab_alloc(Thread* thr) const;
   // Can a compiler initialize a new object without store barriers?
   // This permission only extends from the creation of a new object
   // via a TLAB up to the first subsequent safepoint.
   virtual bool can_elide_tlab_store_barriers() const {
     return true;
   }
   virtual bool card_mark_must_follow_store() const {
     return false;
   }
   // Return true if we don't we need a store barrier for
   // initializing stores to an object at this address.
   virtual bool can_elide_initializing_store_barrier(oop new_obj);
   // Can a compiler elide a store barrier when it writes
   // a permanent oop into the heap?  Applies when the compiler
   // is storing x to the heap, where x->is_perm() is true.
   virtual bool can_elide_permanent_oop_store_barriers() const {
     return true;
   }
   void oop_iterate(OopClosure* cl);
   void object_iterate(ObjectClosure* cl);
   void safe_object_iterate(ObjectClosure* cl) { object_iterate(cl); }
   void permanent_oop_iterate(OopClosure* cl);
   void permanent_object_iterate(ObjectClosure* cl);
   HeapWord* block_start(const void* addr) const;
   size_t block_size(const HeapWord* addr) const;
   bool block_is_obj(const HeapWord* addr) const;
   jlong millis_since_last_gc();
   void prepare_for_verify();
   void print() const;
   void print_on(outputStream* st) const;
   virtual void print_gc_threads_on(outputStream* st) const;
   virtual void gc_threads_do(ThreadClosure* tc) const;
   virtual void print_tracing_info() const;
   void verify(bool allow_dirty, bool silent, bool /* option */);
   void print_heap_change(size_t prev_used);
   // Resize the young generation.  The reserved space for the
   // generation may be expanded in preparation for the resize.
   void resize_young_gen(size_t eden_size, size_t survivor_size);
   // Resize the old generation.  The reserved space for the
   // generation may be expanded in preparation for the resize.
   void resize_old_gen(size_t desired_free_space);
   // Save the tops of the spaces in all generations
   void record_gen_tops_before_GC() PRODUCT_RETURN;
   // Mangle the unused parts of all spaces in the heap
   void gen_mangle_unused_area() PRODUCT_RETURN;
   // Call these in sequential code around the processing of strong roots.
   class ParStrongRootsScope : public MarkingCodeBlobClosure::MarkScope {
   public:
     ParStrongRootsScope();
     ~ParStrongRootsScope();
   };
 };
 inline size_t ParallelScavengeHeap::set_alignment(size_t& var, size_t val)
 {
   assert(is_power_of_2((intptr_t)val), "must be a power of 2");
   var = round_to(val, intra_heap_alignment());
   return var;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/gc_implementation/parallelScavenge/parallelScavengeHeap.hpp@c18cbe5936b8 (annotated)

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