hotspot/src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.hpp
author jcoomes
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child 11178 8318f84ac604
permissions -rw-r--r--
6841742: par compact - remove unused/unsupported options Summary: ignore UseParallel{OldGCDensePrefix,OldGCCompacting,DensePrefixUpdate} Reviewed-by: jwilhelm, brutisso
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/*
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 * Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSPARALLELCOMPACT_HPP
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#define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSPARALLELCOMPACT_HPP
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#include "gc_implementation/parallelScavenge/objectStartArray.hpp"
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#include "gc_implementation/parallelScavenge/parMarkBitMap.hpp"
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#include "gc_implementation/parallelScavenge/psCompactionManager.hpp"
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#include "gc_implementation/shared/collectorCounters.hpp"
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#include "gc_implementation/shared/markSweep.hpp"
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#include "gc_implementation/shared/mutableSpace.hpp"
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#include "memory/sharedHeap.hpp"
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#include "oops/oop.hpp"
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class ParallelScavengeHeap;
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class PSAdaptiveSizePolicy;
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class PSYoungGen;
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class PSOldGen;
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class PSPermGen;
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class ParCompactionManager;
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class ParallelTaskTerminator;
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class PSParallelCompact;
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class GCTaskManager;
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class GCTaskQueue;
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class PreGCValues;
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class MoveAndUpdateClosure;
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class RefProcTaskExecutor;
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// The SplitInfo class holds the information needed to 'split' a source region
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// so that the live data can be copied to two destination *spaces*.  Normally,
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// all the live data in a region is copied to a single destination space (e.g.,
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// everything live in a region in eden is copied entirely into the old gen).
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// However, when the heap is nearly full, all the live data in eden may not fit
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// into the old gen.  Copying only some of the regions from eden to old gen
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// requires finding a region that does not contain a partial object (i.e., no
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// live object crosses the region boundary) somewhere near the last object that
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// does fit into the old gen.  Since it's not always possible to find such a
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// region, splitting is necessary for predictable behavior.
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//
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// A region is always split at the end of the partial object.  This avoids
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// additional tests when calculating the new location of a pointer, which is a
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// very hot code path.  The partial object and everything to its left will be
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// copied to another space (call it dest_space_1).  The live data to the right
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// of the partial object will be copied either within the space itself, or to a
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// different destination space (distinct from dest_space_1).
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//
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// Split points are identified during the summary phase, when region
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// destinations are computed:  data about the split, including the
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// partial_object_size, is recorded in a SplitInfo record and the
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// partial_object_size field in the summary data is set to zero.  The zeroing is
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// possible (and necessary) since the partial object will move to a different
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// destination space than anything to its right, thus the partial object should
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// not affect the locations of any objects to its right.
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//
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// The recorded data is used during the compaction phase, but only rarely:  when
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// the partial object on the split region will be copied across a destination
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// region boundary.  This test is made once each time a region is filled, and is
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// a simple address comparison, so the overhead is negligible (see
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// PSParallelCompact::first_src_addr()).
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//
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// Notes:
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//
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// Only regions with partial objects are split; a region without a partial
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// object does not need any extra bookkeeping.
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//
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// At most one region is split per space, so the amount of data required is
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// constant.
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//
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// A region is split only when the destination space would overflow.  Once that
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// happens, the destination space is abandoned and no other data (even from
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// other source spaces) is targeted to that destination space.  Abandoning the
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// destination space may leave a somewhat large unused area at the end, if a
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// large object caused the overflow.
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//
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// Future work:
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//
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// More bookkeeping would be required to continue to use the destination space.
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// The most general solution would allow data from regions in two different
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// source spaces to be "joined" in a single destination region.  At the very
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// least, additional code would be required in next_src_region() to detect the
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// join and skip to an out-of-order source region.  If the join region was also
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// the last destination region to which a split region was copied (the most
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// likely case), then additional work would be needed to get fill_region() to
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// stop iteration and switch to a new source region at the right point.  Basic
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// idea would be to use a fake value for the top of the source space.  It is
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// doable, if a bit tricky.
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//
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// A simpler (but less general) solution would fill the remainder of the
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// destination region with a dummy object and continue filling the next
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// destination region.
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class SplitInfo
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{
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public:
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  // Return true if this split info is valid (i.e., if a split has been
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  // recorded).  The very first region cannot have a partial object and thus is
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  // never split, so 0 is the 'invalid' value.
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  bool is_valid() const { return _src_region_idx > 0; }
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  // Return true if this split holds data for the specified source region.
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  inline bool is_split(size_t source_region) const;
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  // The index of the split region, the size of the partial object on that
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  // region and the destination of the partial object.
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  size_t    src_region_idx() const   { return _src_region_idx; }
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  size_t    partial_obj_size() const { return _partial_obj_size; }
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  HeapWord* destination() const      { return _destination; }
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  // The destination count of the partial object referenced by this split
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  // (either 1 or 2).  This must be added to the destination count of the
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  // remainder of the source region.
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  unsigned int destination_count() const { return _destination_count; }
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  // If a word within the partial object will be written to the first word of a
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  // destination region, this is the address of the destination region;
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  // otherwise this is NULL.
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  HeapWord* dest_region_addr() const     { return _dest_region_addr; }
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  // If a word within the partial object will be written to the first word of a
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  // destination region, this is the address of that word within the partial
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  // object; otherwise this is NULL.
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  HeapWord* first_src_addr() const       { return _first_src_addr; }
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  // Record the data necessary to split the region src_region_idx.
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  void record(size_t src_region_idx, size_t partial_obj_size,
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              HeapWord* destination);
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  void clear();
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  DEBUG_ONLY(void verify_clear();)
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private:
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  size_t       _src_region_idx;
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  size_t       _partial_obj_size;
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  HeapWord*    _destination;
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  unsigned int _destination_count;
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  HeapWord*    _dest_region_addr;
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  HeapWord*    _first_src_addr;
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};
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inline bool SplitInfo::is_split(size_t region_idx) const
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{
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  return _src_region_idx == region_idx && is_valid();
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}
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class SpaceInfo
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{
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 public:
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  MutableSpace* space() const { return _space; }
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  // Where the free space will start after the collection.  Valid only after the
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  // summary phase completes.
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  HeapWord* new_top() const { return _new_top; }
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  // Allows new_top to be set.
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  HeapWord** new_top_addr() { return &_new_top; }
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  // Where the smallest allowable dense prefix ends (used only for perm gen).
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  HeapWord* min_dense_prefix() const { return _min_dense_prefix; }
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  // Where the dense prefix ends, or the compacted region begins.
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  HeapWord* dense_prefix() const { return _dense_prefix; }
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  // The start array for the (generation containing the) space, or NULL if there
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  // is no start array.
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  ObjectStartArray* start_array() const { return _start_array; }
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  SplitInfo& split_info() { return _split_info; }
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  void set_space(MutableSpace* s)           { _space = s; }
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  void set_new_top(HeapWord* addr)          { _new_top = addr; }
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  void set_min_dense_prefix(HeapWord* addr) { _min_dense_prefix = addr; }
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  void set_dense_prefix(HeapWord* addr)     { _dense_prefix = addr; }
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  void set_start_array(ObjectStartArray* s) { _start_array = s; }
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  void publish_new_top() const              { _space->set_top(_new_top); }
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  MutableSpace*     _space;
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  HeapWord*         _new_top;
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  HeapWord*         _min_dense_prefix;
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  HeapWord*         _dense_prefix;
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  ObjectStartArray* _start_array;
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  SplitInfo         _split_info;
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};
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class ParallelCompactData
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{
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public:
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  // Sizes are in HeapWords, unless indicated otherwise.
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  static const size_t Log2RegionSize;
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  static const size_t RegionSize;
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  static const size_t RegionSizeBytes;
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  // Mask for the bits in a size_t to get an offset within a region.
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  static const size_t RegionSizeOffsetMask;
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  // Mask for the bits in a pointer to get an offset within a region.
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  static const size_t RegionAddrOffsetMask;
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  // Mask for the bits in a pointer to get the address of the start of a region.
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  static const size_t RegionAddrMask;
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  class RegionData
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  {
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  public:
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    // Destination address of the region.
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    HeapWord* destination() const { return _destination; }
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    // The first region containing data destined for this region.
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    size_t source_region() const { return _source_region; }
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    // The object (if any) starting in this region and ending in a different
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    // region that could not be updated during the main (parallel) compaction
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    // phase.  This is different from _partial_obj_addr, which is an object that
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    // extends onto a source region.  However, the two uses do not overlap in
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    // time, so the same field is used to save space.
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    HeapWord* deferred_obj_addr() const { return _partial_obj_addr; }
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    // The starting address of the partial object extending onto the region.
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    HeapWord* partial_obj_addr() const { return _partial_obj_addr; }
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    // Size of the partial object extending onto the region (words).
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    size_t partial_obj_size() const { return _partial_obj_size; }
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    // Size of live data that lies within this region due to objects that start
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    // in this region (words).  This does not include the partial object
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    // extending onto the region (if any), or the part of an object that extends
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    // onto the next region (if any).
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    size_t live_obj_size() const { return _dc_and_los & los_mask; }
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    // Total live data that lies within the region (words).
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    size_t data_size() const { return partial_obj_size() + live_obj_size(); }
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    // The destination_count is the number of other regions to which data from
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    // this region will be copied.  At the end of the summary phase, the valid
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    // values of destination_count are
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    //
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    // 0 - data from the region will be compacted completely into itself, or the
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    //     region is empty.  The region can be claimed and then filled.
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    // 1 - data from the region will be compacted into 1 other region; some
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    //     data from the region may also be compacted into the region itself.
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    // 2 - data from the region will be copied to 2 other regions.
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    //
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    // During compaction as regions are emptied, the destination_count is
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    // decremented (atomically) and when it reaches 0, it can be claimed and
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    // then filled.
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    //
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    // A region is claimed for processing by atomically changing the
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    // destination_count to the claimed value (dc_claimed).  After a region has
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    // been filled, the destination_count should be set to the completed value
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    // (dc_completed).
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    inline uint destination_count() const;
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    inline uint destination_count_raw() const;
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    // The location of the java heap data that corresponds to this region.
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    inline HeapWord* data_location() const;
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    // The highest address referenced by objects in this region.
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    inline HeapWord* highest_ref() const;
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    // Whether this region is available to be claimed, has been claimed, or has
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    // been completed.
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    //
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    // Minor subtlety:  claimed() returns true if the region is marked
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    // completed(), which is desirable since a region must be claimed before it
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    // can be completed.
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    bool available() const { return _dc_and_los < dc_one; }
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    bool claimed() const   { return _dc_and_los >= dc_claimed; }
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    bool completed() const { return _dc_and_los >= dc_completed; }
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    // These are not atomic.
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    void set_destination(HeapWord* addr)       { _destination = addr; }
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    void set_source_region(size_t region)      { _source_region = region; }
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    void set_deferred_obj_addr(HeapWord* addr) { _partial_obj_addr = addr; }
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    void set_partial_obj_addr(HeapWord* addr)  { _partial_obj_addr = addr; }
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    void set_partial_obj_size(size_t words)    {
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      _partial_obj_size = (region_sz_t) words;
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    }
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    inline void set_destination_count(uint count);
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    inline void set_live_obj_size(size_t words);
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    inline void set_data_location(HeapWord* addr);
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    inline void set_completed();
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    inline bool claim_unsafe();
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    // These are atomic.
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    inline void add_live_obj(size_t words);
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    inline void set_highest_ref(HeapWord* addr);
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    inline void decrement_destination_count();
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    inline bool claim();
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  private:
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    // The type used to represent object sizes within a region.
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    typedef uint region_sz_t;
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    // Constants for manipulating the _dc_and_los field, which holds both the
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    // destination count and live obj size.  The live obj size lives at the
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    // least significant end so no masking is necessary when adding.
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    static const region_sz_t dc_shift;           // Shift amount.
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    static const region_sz_t dc_mask;            // Mask for destination count.
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    static const region_sz_t dc_one;             // 1, shifted appropriately.
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    static const region_sz_t dc_claimed;         // Region has been claimed.
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    static const region_sz_t dc_completed;       // Region has been completed.
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    static const region_sz_t los_mask;           // Mask for live obj size.
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    HeapWord*            _destination;
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    size_t               _source_region;
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    HeapWord*            _partial_obj_addr;
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    region_sz_t          _partial_obj_size;
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    region_sz_t volatile _dc_and_los;
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#ifdef ASSERT
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    // These enable optimizations that are only partially implemented.  Use
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    // debug builds to prevent the code fragments from breaking.
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    HeapWord*            _data_location;
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    HeapWord*            _highest_ref;
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#endif  // #ifdef ASSERT
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#ifdef ASSERT
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   public:
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    uint            _pushed;   // 0 until region is pushed onto a worker's stack
1
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   private:
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#endif
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  };
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public:
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  ParallelCompactData();
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  bool initialize(MemRegion covered_region);
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  size_t region_count() const { return _region_count; }
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  // Convert region indices to/from RegionData pointers.
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  inline RegionData* region(size_t region_idx) const;
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  inline size_t     region(const RegionData* const region_ptr) const;
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  // Returns true if the given address is contained within the region
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  bool region_contains(size_t region_index, HeapWord* addr);
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   359
  void add_obj(HeapWord* addr, size_t len);
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   360
  void add_obj(oop p, size_t len) { add_obj((HeapWord*)p, len); }
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   361
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  // Fill in the regions covering [beg, end) so that no data moves; i.e., the
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  // destination of region n is simply the start of region n.  The argument beg
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  // must be region-aligned; end need not be.
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  void summarize_dense_prefix(HeapWord* beg, HeapWord* end);
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  HeapWord* summarize_split_space(size_t src_region, SplitInfo& split_info,
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                                  HeapWord* destination, HeapWord* target_end,
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   369
                                  HeapWord** target_next);
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  bool summarize(SplitInfo& split_info,
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                 HeapWord* source_beg, HeapWord* source_end,
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                 HeapWord** source_next,
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   373
                 HeapWord* target_beg, HeapWord* target_end,
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   374
                 HeapWord** target_next);
1
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   375
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   376
  void clear();
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  void clear_range(size_t beg_region, size_t end_region);
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   378
  void clear_range(HeapWord* beg, HeapWord* end) {
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    clear_range(addr_to_region_idx(beg), addr_to_region_idx(end));
1
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   380
  }
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   381
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   382
  // Return the number of words between addr and the start of the region
1
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  // containing addr.
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   384
  inline size_t     region_offset(const HeapWord* addr) const;
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   385
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   386
  // Convert addresses to/from a region index or region pointer.
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   387
  inline size_t     addr_to_region_idx(const HeapWord* addr) const;
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   388
  inline RegionData* addr_to_region_ptr(const HeapWord* addr) const;
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   389
  inline HeapWord*  region_to_addr(size_t region) const;
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   390
  inline HeapWord*  region_to_addr(size_t region, size_t offset) const;
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   391
  inline HeapWord*  region_to_addr(const RegionData* region) const;
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   392
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   393
  inline HeapWord*  region_align_down(HeapWord* addr) const;
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   394
  inline HeapWord*  region_align_up(HeapWord* addr) const;
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   395
  inline bool       is_region_aligned(HeapWord* addr) const;
1
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   396
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   397
  // Return the address one past the end of the partial object.
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   398
  HeapWord* partial_obj_end(size_t region_idx) const;
1
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   399
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   400
  // Return the new location of the object p after the
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   401
  // the compaction.
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   402
  HeapWord* calc_new_pointer(HeapWord* addr);
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   403
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   404
  HeapWord* calc_new_pointer(oop p) {
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   405
    return calc_new_pointer((HeapWord*) p);
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   406
  }
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   407
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   408
  // Return the updated address for the given klass
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   409
  klassOop calc_new_klass(klassOop);
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   410
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   411
#ifdef  ASSERT
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   412
  void verify_clear(const PSVirtualSpace* vspace);
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   413
  void verify_clear();
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   414
#endif  // #ifdef ASSERT
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   415
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   416
private:
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   417
  bool initialize_region_data(size_t region_size);
1
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   418
  PSVirtualSpace* create_vspace(size_t count, size_t element_size);
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   419
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   420
private:
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   421
  HeapWord*       _region_start;
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   422
#ifdef  ASSERT
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   423
  HeapWord*       _region_end;
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   424
#endif  // #ifdef ASSERT
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   425
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   426
  PSVirtualSpace* _region_vspace;
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   427
  RegionData*     _region_data;
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   428
  size_t          _region_count;
1
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   429
};
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   430
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   431
inline uint
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   432
ParallelCompactData::RegionData::destination_count_raw() const
1
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   433
{
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   434
  return _dc_and_los & dc_mask;
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   435
}
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   436
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   437
inline uint
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   438
ParallelCompactData::RegionData::destination_count() const
1
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   439
{
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   440
  return destination_count_raw() >> dc_shift;
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   441
}
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   442
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   443
inline void
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   444
ParallelCompactData::RegionData::set_destination_count(uint count)
1
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   445
{
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   446
  assert(count <= (dc_completed >> dc_shift), "count too large");
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   447
  const region_sz_t live_sz = (region_sz_t) live_obj_size();
1
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   448
  _dc_and_los = (count << dc_shift) | live_sz;
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   449
}
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   450
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   451
inline void ParallelCompactData::RegionData::set_live_obj_size(size_t words)
1
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   452
{
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   453
  assert(words <= los_mask, "would overflow");
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diff changeset
   454
  _dc_and_los = destination_count_raw() | (region_sz_t)words;
1
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   455
}
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   456
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   457
inline void ParallelCompactData::RegionData::decrement_destination_count()
1
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   458
{
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   459
  assert(_dc_and_los < dc_claimed, "already claimed");
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parents:
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   460
  assert(_dc_and_los >= dc_one, "count would go negative");
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   461
  Atomic::add((int)dc_mask, (volatile int*)&_dc_and_los);
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   462
}
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   463
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   464
inline HeapWord* ParallelCompactData::RegionData::data_location() const
1
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   465
{
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   466
  DEBUG_ONLY(return _data_location;)
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   467
  NOT_DEBUG(return NULL;)
489c9b5090e2 Initial load
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   468
}
489c9b5090e2 Initial load
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   469
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   470
inline HeapWord* ParallelCompactData::RegionData::highest_ref() const
1
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   471
{
489c9b5090e2 Initial load
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   472
  DEBUG_ONLY(return _highest_ref;)
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parents:
diff changeset
   473
  NOT_DEBUG(return NULL;)
489c9b5090e2 Initial load
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parents:
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   474
}
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   475
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diff changeset
   476
inline void ParallelCompactData::RegionData::set_data_location(HeapWord* addr)
1
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   477
{
489c9b5090e2 Initial load
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parents:
diff changeset
   478
  DEBUG_ONLY(_data_location = addr;)
489c9b5090e2 Initial load
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   479
}
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parents:
diff changeset
   480
1407
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diff changeset
   481
inline void ParallelCompactData::RegionData::set_completed()
1
489c9b5090e2 Initial load
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   482
{
489c9b5090e2 Initial load
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parents:
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   483
  assert(claimed(), "must be claimed first");
1407
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parents: 977
diff changeset
   484
  _dc_and_los = dc_completed | (region_sz_t) live_obj_size();
1
489c9b5090e2 Initial load
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parents:
diff changeset
   485
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   486
1407
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diff changeset
   487
// MT-unsafe claiming of a region.  Should only be used during single threaded
1
489c9b5090e2 Initial load
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parents:
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   488
// execution.
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diff changeset
   489
inline bool ParallelCompactData::RegionData::claim_unsafe()
1
489c9b5090e2 Initial load
duke
parents:
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   490
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   491
  if (available()) {
489c9b5090e2 Initial load
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parents:
diff changeset
   492
    _dc_and_los |= dc_claimed;
489c9b5090e2 Initial load
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parents:
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   493
    return true;
489c9b5090e2 Initial load
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   494
  }
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   495
  return false;
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parents:
diff changeset
   496
}
489c9b5090e2 Initial load
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parents:
diff changeset
   497
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diff changeset
   498
inline void ParallelCompactData::RegionData::add_live_obj(size_t words)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   499
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   500
  assert(words <= (size_t)los_mask - live_obj_size(), "overflow");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   501
  Atomic::add((int) words, (volatile int*) &_dc_and_los);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   502
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   504
inline void ParallelCompactData::RegionData::set_highest_ref(HeapWord* addr)
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   505
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   506
#ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
  HeapWord* tmp = _highest_ref;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
  while (addr > tmp) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   509
    tmp = (HeapWord*)Atomic::cmpxchg_ptr(addr, &_highest_ref, tmp);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   511
#endif  // #ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   512
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   513
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   514
inline bool ParallelCompactData::RegionData::claim()
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
  const int los = (int) live_obj_size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   517
  const int old = Atomic::cmpxchg(dc_claimed | los,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   518
                                  (volatile int*) &_dc_and_los, los);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   519
  return old == los;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   520
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   521
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   522
inline ParallelCompactData::RegionData*
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   523
ParallelCompactData::region(size_t region_idx) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   524
{
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   525
  assert(region_idx <= region_count(), "bad arg");
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   526
  return _region_data + region_idx;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   527
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   528
489c9b5090e2 Initial load
duke
parents:
diff changeset
   529
inline size_t
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   530
ParallelCompactData::region(const RegionData* const region_ptr) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   531
{
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   532
  assert(region_ptr >= _region_data, "bad arg");
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   533
  assert(region_ptr <= _region_data + region_count(), "bad arg");
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   534
  return pointer_delta(region_ptr, _region_data, sizeof(RegionData));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   535
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
inline size_t
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   538
ParallelCompactData::region_offset(const HeapWord* addr) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
  assert(addr >= _region_start, "bad addr");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   541
  assert(addr <= _region_end, "bad addr");
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   542
  return (size_t(addr) & RegionAddrOffsetMask) >> LogHeapWordSize;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
inline size_t
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   546
ParallelCompactData::addr_to_region_idx(const HeapWord* addr) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   547
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   548
  assert(addr >= _region_start, "bad addr");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   549
  assert(addr <= _region_end, "bad addr");
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   550
  return pointer_delta(addr, _region_start) >> Log2RegionSize;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   551
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   552
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   553
inline ParallelCompactData::RegionData*
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   554
ParallelCompactData::addr_to_region_ptr(const HeapWord* addr) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   555
{
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   556
  return region(addr_to_region_idx(addr));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   557
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   558
489c9b5090e2 Initial load
duke
parents:
diff changeset
   559
inline HeapWord*
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   560
ParallelCompactData::region_to_addr(size_t region) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   561
{
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   562
  assert(region <= _region_count, "region out of range");
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   563
  return _region_start + (region << Log2RegionSize);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   564
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   565
489c9b5090e2 Initial load
duke
parents:
diff changeset
   566
inline HeapWord*
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   567
ParallelCompactData::region_to_addr(const RegionData* region) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   568
{
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   569
  return region_to_addr(pointer_delta(region, _region_data,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   570
                                      sizeof(RegionData)));
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   571
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   572
489c9b5090e2 Initial load
duke
parents:
diff changeset
   573
inline HeapWord*
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   574
ParallelCompactData::region_to_addr(size_t region, size_t offset) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   575
{
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   576
  assert(region <= _region_count, "region out of range");
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   577
  assert(offset < RegionSize, "offset too big");  // This may be too strict.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   578
  return region_to_addr(region) + offset;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   579
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   580
489c9b5090e2 Initial load
duke
parents:
diff changeset
   581
inline HeapWord*
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   582
ParallelCompactData::region_align_down(HeapWord* addr) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   583
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   584
  assert(addr >= _region_start, "bad addr");
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   585
  assert(addr < _region_end + RegionSize, "bad addr");
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   586
  return (HeapWord*)(size_t(addr) & RegionAddrMask);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   587
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   588
489c9b5090e2 Initial load
duke
parents:
diff changeset
   589
inline HeapWord*
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   590
ParallelCompactData::region_align_up(HeapWord* addr) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   591
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   592
  assert(addr >= _region_start, "bad addr");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   593
  assert(addr <= _region_end, "bad addr");
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   594
  return region_align_down(addr + RegionSizeOffsetMask);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   595
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   596
489c9b5090e2 Initial load
duke
parents:
diff changeset
   597
inline bool
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   598
ParallelCompactData::is_region_aligned(HeapWord* addr) const
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   599
{
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   600
  return region_offset(addr) == 0;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   601
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   602
489c9b5090e2 Initial load
duke
parents:
diff changeset
   603
// Abstract closure for use with ParMarkBitMap::iterate(), which will invoke the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   604
// do_addr() method.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   605
//
489c9b5090e2 Initial load
duke
parents:
diff changeset
   606
// The closure is initialized with the number of heap words to process
489c9b5090e2 Initial load
duke
parents:
diff changeset
   607
// (words_remaining()), and becomes 'full' when it reaches 0.  The do_addr()
489c9b5090e2 Initial load
duke
parents:
diff changeset
   608
// methods in subclasses should update the total as words are processed.  Since
489c9b5090e2 Initial load
duke
parents:
diff changeset
   609
// only one subclass actually uses this mechanism to terminate iteration, the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   610
// default initial value is > 0.  The implementation is here and not in the
489c9b5090e2 Initial load
duke
parents:
diff changeset
   611
// single subclass that uses it to avoid making is_full() virtual, and thus
489c9b5090e2 Initial load
duke
parents:
diff changeset
   612
// adding a virtual call per live object.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   613
489c9b5090e2 Initial load
duke
parents:
diff changeset
   614
class ParMarkBitMapClosure: public StackObj {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   615
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   616
  typedef ParMarkBitMap::idx_t idx_t;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   617
  typedef ParMarkBitMap::IterationStatus IterationStatus;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   618
489c9b5090e2 Initial load
duke
parents:
diff changeset
   619
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   620
  inline ParMarkBitMapClosure(ParMarkBitMap* mbm, ParCompactionManager* cm,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   621
                              size_t words = max_uintx);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   622
489c9b5090e2 Initial load
duke
parents:
diff changeset
   623
  inline ParCompactionManager* compaction_manager() const;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   624
  inline ParMarkBitMap*        bitmap() const;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   625
  inline size_t                words_remaining() const;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   626
  inline bool                  is_full() const;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   627
  inline HeapWord*             source() const;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   628
489c9b5090e2 Initial load
duke
parents:
diff changeset
   629
  inline void                  set_source(HeapWord* addr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   630
489c9b5090e2 Initial load
duke
parents:
diff changeset
   631
  virtual IterationStatus do_addr(HeapWord* addr, size_t words) = 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   632
489c9b5090e2 Initial load
duke
parents:
diff changeset
   633
 protected:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   634
  inline void decrement_words_remaining(size_t words);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   635
489c9b5090e2 Initial load
duke
parents:
diff changeset
   636
 private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   637
  ParMarkBitMap* const        _bitmap;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   638
  ParCompactionManager* const _compaction_manager;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   639
  DEBUG_ONLY(const size_t     _initial_words_remaining;) // Useful in debugger.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   640
  size_t                      _words_remaining; // Words left to copy.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   641
489c9b5090e2 Initial load
duke
parents:
diff changeset
   642
 protected:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   643
  HeapWord*                   _source;          // Next addr that would be read.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   644
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
   645
489c9b5090e2 Initial load
duke
parents:
diff changeset
   646
inline
489c9b5090e2 Initial load
duke
parents:
diff changeset
   647
ParMarkBitMapClosure::ParMarkBitMapClosure(ParMarkBitMap* bitmap,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   648
                                           ParCompactionManager* cm,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   649
                                           size_t words):
489c9b5090e2 Initial load
duke
parents:
diff changeset
   650
  _bitmap(bitmap), _compaction_manager(cm)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   651
#ifdef  ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   652
  , _initial_words_remaining(words)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   653
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
   654
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
   655
  _words_remaining = words;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   656
  _source = NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   657
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   658
489c9b5090e2 Initial load
duke
parents:
diff changeset
   659
inline ParCompactionManager* ParMarkBitMapClosure::compaction_manager() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   660
  return _compaction_manager;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   661
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   662
489c9b5090e2 Initial load
duke
parents:
diff changeset
   663
inline ParMarkBitMap* ParMarkBitMapClosure::bitmap() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   664
  return _bitmap;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   665
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   666
489c9b5090e2 Initial load
duke
parents:
diff changeset
   667
inline size_t ParMarkBitMapClosure::words_remaining() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   668
  return _words_remaining;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   669
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   670
489c9b5090e2 Initial load
duke
parents:
diff changeset
   671
inline bool ParMarkBitMapClosure::is_full() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   672
  return words_remaining() == 0;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   673
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   674
489c9b5090e2 Initial load
duke
parents:
diff changeset
   675
inline HeapWord* ParMarkBitMapClosure::source() const {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   676
  return _source;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   677
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   678
489c9b5090e2 Initial load
duke
parents:
diff changeset
   679
inline void ParMarkBitMapClosure::set_source(HeapWord* addr) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   680
  _source = addr;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   681
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   682
489c9b5090e2 Initial load
duke
parents:
diff changeset
   683
inline void ParMarkBitMapClosure::decrement_words_remaining(size_t words) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   684
  assert(_words_remaining >= words, "processed too many words");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   685
  _words_remaining -= words;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   686
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   687
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   688
// The UseParallelOldGC collector is a stop-the-world garbage collector that
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   689
// does parts of the collection using parallel threads.  The collection includes
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   690
// the tenured generation and the young generation.  The permanent generation is
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   691
// collected at the same time as the other two generations but the permanent
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   692
// generation is collect by a single GC thread.  The permanent generation is
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   693
// collected serially because of the requirement that during the processing of a
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   694
// klass AAA, any objects reference by AAA must already have been processed.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   695
// This requirement is enforced by a left (lower address) to right (higher
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   696
// address) sliding compaction.
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   697
//
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   698
// There are four phases of the collection.
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   699
//
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   700
//      - marking phase
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   701
//      - summary phase
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   702
//      - compacting phase
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   703
//      - clean up phase
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   704
//
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   705
// Roughly speaking these phases correspond, respectively, to
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   706
//      - mark all the live objects
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   707
//      - calculate the destination of each object at the end of the collection
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   708
//      - move the objects to their destination
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   709
//      - update some references and reinitialize some variables
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   710
//
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   711
// These three phases are invoked in PSParallelCompact::invoke_no_policy().  The
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   712
// marking phase is implemented in PSParallelCompact::marking_phase() and does a
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   713
// complete marking of the heap.  The summary phase is implemented in
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   714
// PSParallelCompact::summary_phase().  The move and update phase is implemented
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   715
// in PSParallelCompact::compact().
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   716
//
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   717
// A space that is being collected is divided into regions and with each region
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   718
// is associated an object of type ParallelCompactData.  Each region is of a
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   719
// fixed size and typically will contain more than 1 object and may have parts
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   720
// of objects at the front and back of the region.
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   721
//
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   722
// region            -----+---------------------+----------
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   723
// objects covered   [ AAA  )[ BBB )[ CCC   )[ DDD     )
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   724
//
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   725
// The marking phase does a complete marking of all live objects in the heap.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   726
// The marking also compiles the size of the data for all live objects covered
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   727
// by the region.  This size includes the part of any live object spanning onto
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   728
// the region (part of AAA if it is live) from the front, all live objects
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   729
// contained in the region (BBB and/or CCC if they are live), and the part of
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   730
// any live objects covered by the region that extends off the region (part of
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   731
// DDD if it is live).  The marking phase uses multiple GC threads and marking
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   732
// is done in a bit array of type ParMarkBitMap.  The marking of the bit map is
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   733
// done atomically as is the accumulation of the size of the live objects
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   734
// covered by a region.
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   735
//
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   736
// The summary phase calculates the total live data to the left of each region
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   737
// XXX.  Based on that total and the bottom of the space, it can calculate the
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   738
// starting location of the live data in XXX.  The summary phase calculates for
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   739
// each region XXX quantites such as
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   740
//
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   741
//      - the amount of live data at the beginning of a region from an object
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   742
//        entering the region.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   743
//      - the location of the first live data on the region
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   744
//      - a count of the number of regions receiving live data from XXX.
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   745
//
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   746
// See ParallelCompactData for precise details.  The summary phase also
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   747
// calculates the dense prefix for the compaction.  The dense prefix is a
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   748
// portion at the beginning of the space that is not moved.  The objects in the
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   749
// dense prefix do need to have their object references updated.  See method
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   750
// summarize_dense_prefix().
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   751
//
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   752
// The summary phase is done using 1 GC thread.
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   753
//
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   754
// The compaction phase moves objects to their new location and updates all
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   755
// references in the object.
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   756
//
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   757
// A current exception is that objects that cross a region boundary are moved
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   758
// but do not have their references updated.  References are not updated because
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   759
// it cannot easily be determined if the klass pointer KKK for the object AAA
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   760
// has been updated.  KKK likely resides in a region to the left of the region
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   761
// containing AAA.  These AAA's have there references updated at the end in a
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   762
// clean up phase.  See the method PSParallelCompact::update_deferred_objects().
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   763
// An alternate strategy is being investigated for this deferral of updating.
971
f0b20be4165d 6672698: mangle_unused_area() should not remangle the entire heap at each collection.
jmasa
parents: 360
diff changeset
   764
//
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   765
// Compaction is done on a region basis.  A region that is ready to be filled is
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   766
// put on a ready list and GC threads take region off the list and fill them.  A
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   767
// region is ready to be filled if it empty of live objects.  Such a region may
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   768
// have been initially empty (only contained dead objects) or may have had all
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   769
// its live objects copied out already.  A region that compacts into itself is
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   770
// also ready for filling.  The ready list is initially filled with empty
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   771
// regions and regions compacting into themselves.  There is always at least 1
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   772
// region that can be put on the ready list.  The regions are atomically added
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   773
// and removed from the ready list.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   774
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   775
class PSParallelCompact : AllStatic {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   776
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   777
  // Convenient access to type names.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   778
  typedef ParMarkBitMap::idx_t idx_t;
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   779
  typedef ParallelCompactData::RegionData RegionData;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   780
489c9b5090e2 Initial load
duke
parents:
diff changeset
   781
  typedef enum {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   782
    perm_space_id, old_space_id, eden_space_id,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   783
    from_space_id, to_space_id, last_space_id
489c9b5090e2 Initial load
duke
parents:
diff changeset
   784
  } SpaceId;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   785
489c9b5090e2 Initial load
duke
parents:
diff changeset
   786
 public:
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   787
  // Inline closure decls
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   788
  //
489c9b5090e2 Initial load
duke
parents:
diff changeset
   789
  class IsAliveClosure: public BoolObjectClosure {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   790
   public:
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   791
    virtual void do_object(oop p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   792
    virtual bool do_object_b(oop p);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   793
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
   794
489c9b5090e2 Initial load
duke
parents:
diff changeset
   795
  class KeepAliveClosure: public OopClosure {
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   796
   private:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   797
    ParCompactionManager* _compaction_manager;
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   798
   protected:
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   799
    template <class T> inline void do_oop_work(T* p);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   800
   public:
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   801
    KeepAliveClosure(ParCompactionManager* cm) : _compaction_manager(cm) { }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   802
    virtual void do_oop(oop* p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   803
    virtual void do_oop(narrowOop* p);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   804
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
   805
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   806
  // Current unused
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   807
  class FollowRootClosure: public OopsInGenClosure {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   808
   private:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   809
    ParCompactionManager* _compaction_manager;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   810
   public:
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   811
    FollowRootClosure(ParCompactionManager* cm) : _compaction_manager(cm) { }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   812
    virtual void do_oop(oop* p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   813
    virtual void do_oop(narrowOop* p);
3908
24b55ad4c228 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 2105
diff changeset
   814
 };
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   815
489c9b5090e2 Initial load
duke
parents:
diff changeset
   816
  class FollowStackClosure: public VoidClosure {
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   817
   private:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   818
    ParCompactionManager* _compaction_manager;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   819
   public:
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   820
    FollowStackClosure(ParCompactionManager* cm) : _compaction_manager(cm) { }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   821
    virtual void do_void();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   822
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
   823
489c9b5090e2 Initial load
duke
parents:
diff changeset
   824
  class AdjustPointerClosure: public OopsInGenClosure {
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   825
   private:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   826
    bool _is_root;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   827
   public:
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   828
    AdjustPointerClosure(bool is_root) : _is_root(is_root) { }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   829
    virtual void do_oop(oop* p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   830
    virtual void do_oop(narrowOop* p);
3908
24b55ad4c228 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 2105
diff changeset
   831
    // do not walk from thread stacks to the code cache on this phase
24b55ad4c228 6863023: need non-perm oops in code cache for JSR 292
jrose
parents: 2105
diff changeset
   832
    virtual void do_code_blob(CodeBlob* cb) const { }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   833
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
   834
489c9b5090e2 Initial load
duke
parents:
diff changeset
   835
  // Closure for verifying update of pointers.  Does not
489c9b5090e2 Initial load
duke
parents:
diff changeset
   836
  // have any side effects.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   837
  class VerifyUpdateClosure: public ParMarkBitMapClosure {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   838
    const MutableSpace* _space; // Is this ever used?
489c9b5090e2 Initial load
duke
parents:
diff changeset
   839
489c9b5090e2 Initial load
duke
parents:
diff changeset
   840
   public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   841
    VerifyUpdateClosure(ParCompactionManager* cm, const MutableSpace* sp) :
489c9b5090e2 Initial load
duke
parents:
diff changeset
   842
      ParMarkBitMapClosure(PSParallelCompact::mark_bitmap(), cm), _space(sp)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   843
    { }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   844
489c9b5090e2 Initial load
duke
parents:
diff changeset
   845
    virtual IterationStatus do_addr(HeapWord* addr, size_t words);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   846
489c9b5090e2 Initial load
duke
parents:
diff changeset
   847
    const MutableSpace* space() { return _space; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   848
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
   849
489c9b5090e2 Initial load
duke
parents:
diff changeset
   850
  // Closure for updating objects altered for debug checking
489c9b5090e2 Initial load
duke
parents:
diff changeset
   851
  class ResetObjectsClosure: public ParMarkBitMapClosure {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   852
   public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   853
    ResetObjectsClosure(ParCompactionManager* cm):
489c9b5090e2 Initial load
duke
parents:
diff changeset
   854
      ParMarkBitMapClosure(PSParallelCompact::mark_bitmap(), cm)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   855
    { }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   856
489c9b5090e2 Initial load
duke
parents:
diff changeset
   857
    virtual IterationStatus do_addr(HeapWord* addr, size_t words);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   858
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
   859
489c9b5090e2 Initial load
duke
parents:
diff changeset
   860
  friend class KeepAliveClosure;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   861
  friend class FollowStackClosure;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   862
  friend class AdjustPointerClosure;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   863
  friend class FollowRootClosure;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   864
  friend class instanceKlassKlass;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   865
  friend class RefProcTaskProxy;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   866
489c9b5090e2 Initial load
duke
parents:
diff changeset
   867
 private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   868
  static elapsedTimer         _accumulated_time;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   869
  static unsigned int         _total_invocations;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   870
  static unsigned int         _maximum_compaction_gc_num;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   871
  static jlong                _time_of_last_gc;   // ms
489c9b5090e2 Initial load
duke
parents:
diff changeset
   872
  static CollectorCounters*   _counters;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   873
  static ParMarkBitMap        _mark_bitmap;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   874
  static ParallelCompactData  _summary_data;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   875
  static IsAliveClosure       _is_alive_closure;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   876
  static SpaceInfo            _space_info[last_space_id];
489c9b5090e2 Initial load
duke
parents:
diff changeset
   877
  static bool                 _print_phases;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   878
  static AdjustPointerClosure _adjust_root_pointer_closure;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   879
  static AdjustPointerClosure _adjust_pointer_closure;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   880
489c9b5090e2 Initial load
duke
parents:
diff changeset
   881
  // Reference processing (used in ...follow_contents)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   882
  static ReferenceProcessor*  _ref_processor;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   883
489c9b5090e2 Initial load
duke
parents:
diff changeset
   884
  // Updated location of intArrayKlassObj.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   885
  static klassOop _updated_int_array_klass_obj;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   886
489c9b5090e2 Initial load
duke
parents:
diff changeset
   887
  // Values computed at initialization and used by dead_wood_limiter().
489c9b5090e2 Initial load
duke
parents:
diff changeset
   888
  static double _dwl_mean;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   889
  static double _dwl_std_dev;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   890
  static double _dwl_first_term;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   891
  static double _dwl_adjustment;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   892
#ifdef  ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   893
  static bool   _dwl_initialized;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   894
#endif  // #ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
   895
489c9b5090e2 Initial load
duke
parents:
diff changeset
   896
 private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
   897
  // Closure accessors
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   898
  static OopClosure* adjust_pointer_closure()      { return (OopClosure*)&_adjust_pointer_closure; }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   899
  static OopClosure* adjust_root_pointer_closure() { return (OopClosure*)&_adjust_root_pointer_closure; }
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   900
  static BoolObjectClosure* is_alive_closure()     { return (BoolObjectClosure*)&_is_alive_closure; }
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   901
489c9b5090e2 Initial load
duke
parents:
diff changeset
   902
  static void initialize_space_info();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   903
489c9b5090e2 Initial load
duke
parents:
diff changeset
   904
  // Return true if details about individual phases should be printed.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   905
  static inline bool print_phases();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   906
489c9b5090e2 Initial load
duke
parents:
diff changeset
   907
  // Clear the marking bitmap and summary data that cover the specified space.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   908
  static void clear_data_covering_space(SpaceId id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   909
489c9b5090e2 Initial load
duke
parents:
diff changeset
   910
  static void pre_compact(PreGCValues* pre_gc_values);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   911
  static void post_compact();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   912
489c9b5090e2 Initial load
duke
parents:
diff changeset
   913
  // Mark live objects
489c9b5090e2 Initial load
duke
parents:
diff changeset
   914
  static void marking_phase(ParCompactionManager* cm,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   915
                            bool maximum_heap_compaction);
3696
9e5d9b5e1049 4957990: Perm heap bloat in JVM
ysr
parents: 2105
diff changeset
   916
  static void follow_weak_klass_links();
9e5d9b5e1049 4957990: Perm heap bloat in JVM
ysr
parents: 2105
diff changeset
   917
  static void follow_mdo_weak_refs();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   918
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   919
  template <class T> static inline void adjust_pointer(T* p, bool is_root);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   920
  static void adjust_root_pointer(oop* p) { adjust_pointer(p, true); }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   921
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   922
  template <class T>
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
   923
  static inline void follow_root(ParCompactionManager* cm, T* p);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   924
489c9b5090e2 Initial load
duke
parents:
diff changeset
   925
  // Compute the dense prefix for the designated space.  This is an experimental
489c9b5090e2 Initial load
duke
parents:
diff changeset
   926
  // implementation currently not used in production.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   927
  static HeapWord* compute_dense_prefix_via_density(const SpaceId id,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   928
                                                    bool maximum_compaction);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   929
489c9b5090e2 Initial load
duke
parents:
diff changeset
   930
  // Methods used to compute the dense prefix.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   931
489c9b5090e2 Initial load
duke
parents:
diff changeset
   932
  // Compute the value of the normal distribution at x = density.  The mean and
489c9b5090e2 Initial load
duke
parents:
diff changeset
   933
  // standard deviation are values saved by initialize_dead_wood_limiter().
489c9b5090e2 Initial load
duke
parents:
diff changeset
   934
  static inline double normal_distribution(double density);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   935
489c9b5090e2 Initial load
duke
parents:
diff changeset
   936
  // Initialize the static vars used by dead_wood_limiter().
489c9b5090e2 Initial load
duke
parents:
diff changeset
   937
  static void initialize_dead_wood_limiter();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   938
489c9b5090e2 Initial load
duke
parents:
diff changeset
   939
  // Return the percentage of space that can be treated as "dead wood" (i.e.,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   940
  // not reclaimed).
489c9b5090e2 Initial load
duke
parents:
diff changeset
   941
  static double dead_wood_limiter(double density, size_t min_percent);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   942
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   943
  // Find the first (left-most) region in the range [beg, end) that has at least
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   944
  // dead_words of dead space to the left.  The argument beg must be the first
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   945
  // region in the space that is not completely live.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   946
  static RegionData* dead_wood_limit_region(const RegionData* beg,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   947
                                            const RegionData* end,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   948
                                            size_t dead_words);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   949
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   950
  // Return a pointer to the first region in the range [beg, end) that is not
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   951
  // completely full.
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   952
  static RegionData* first_dead_space_region(const RegionData* beg,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   953
                                             const RegionData* end);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   954
489c9b5090e2 Initial load
duke
parents:
diff changeset
   955
  // Return a value indicating the benefit or 'yield' if the compacted region
489c9b5090e2 Initial load
duke
parents:
diff changeset
   956
  // were to start (or equivalently if the dense prefix were to end) at the
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   957
  // candidate region.  Higher values are better.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   958
  //
489c9b5090e2 Initial load
duke
parents:
diff changeset
   959
  // The value is based on the amount of space reclaimed vs. the costs of (a)
489c9b5090e2 Initial load
duke
parents:
diff changeset
   960
  // updating references in the dense prefix plus (b) copying objects and
489c9b5090e2 Initial load
duke
parents:
diff changeset
   961
  // updating references in the compacted region.
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   962
  static inline double reclaimed_ratio(const RegionData* const candidate,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   963
                                       HeapWord* const bottom,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   964
                                       HeapWord* const top,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   965
                                       HeapWord* const new_top);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   966
489c9b5090e2 Initial load
duke
parents:
diff changeset
   967
  // Compute the dense prefix for the designated space.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   968
  static HeapWord* compute_dense_prefix(const SpaceId id,
489c9b5090e2 Initial load
duke
parents:
diff changeset
   969
                                        bool maximum_compaction);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   970
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   971
  // Return true if dead space crosses onto the specified Region; bit must be
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   972
  // the bit index corresponding to the first word of the Region.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
   973
  static inline bool dead_space_crosses_boundary(const RegionData* region,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   974
                                                 idx_t bit);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   975
489c9b5090e2 Initial load
duke
parents:
diff changeset
   976
  // Summary phase utility routine to fill dead space (if any) at the dense
489c9b5090e2 Initial load
duke
parents:
diff changeset
   977
  // prefix boundary.  Should only be called if the the dense prefix is
489c9b5090e2 Initial load
duke
parents:
diff changeset
   978
  // non-empty.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   979
  static void fill_dense_prefix_end(SpaceId id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
   980
1669
c921639400dd 6765745: par compact - allow young gen spaces to be split
jcoomes
parents: 1668
diff changeset
   981
  // Clear the summary data source_region field for the specified addresses.
c921639400dd 6765745: par compact - allow young gen spaces to be split
jcoomes
parents: 1668
diff changeset
   982
  static void clear_source_region(HeapWord* beg_addr, HeapWord* end_addr);
c921639400dd 6765745: par compact - allow young gen spaces to be split
jcoomes
parents: 1668
diff changeset
   983
1670
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
   984
#ifndef PRODUCT
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
   985
  // Routines to provoke splitting a young gen space (ParallelOldGCSplitALot).
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
   986
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
   987
  // Fill the region [start, start + words) with live object(s).  Only usable
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
   988
  // for the old and permanent generations.
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
   989
  static void fill_with_live_objects(SpaceId id, HeapWord* const start,
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
   990
                                     size_t words);
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
   991
  // Include the new objects in the summary data.
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
   992
  static void summarize_new_objects(SpaceId id, HeapWord* start);
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
   993
1683
56dd12dd6cb3 6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents: 1682
diff changeset
   994
  // Add live objects to a survivor space since it's rare that both survivors
56dd12dd6cb3 6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents: 1682
diff changeset
   995
  // are non-empty.
56dd12dd6cb3 6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents: 1682
diff changeset
   996
  static void provoke_split_fill_survivor(SpaceId id);
56dd12dd6cb3 6786188: par compact - "SplitALot" stress mode should fill to_space
jcoomes
parents: 1682
diff changeset
   997
1670
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
   998
  // Add live objects and/or choose the dense prefix to provoke splitting.
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
   999
  static void provoke_split(bool & maximum_compaction);
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
  1000
#endif
0deb85ea62d5 6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents: 1669
diff changeset
  1001
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1002
  static void summarize_spaces_quick();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1003
  static void summarize_space(SpaceId id, bool maximum_compaction);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1004
  static void summary_phase(ParCompactionManager* cm, bool maximum_compaction);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1005
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1006
  // Adjust addresses in roots.  Does not adjust addresses in heap.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1007
  static void adjust_roots();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1008
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1009
  // Serial code executed in preparation for the compaction phase.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1010
  static void compact_prologue();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1011
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1012
  // Move objects to new locations.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1013
  static void compact_perm(ParCompactionManager* cm);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1014
  static void compact();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1015
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1016
  // Add available regions to the stack and draining tasks to the task queue.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1017
  static void enqueue_region_draining_tasks(GCTaskQueue* q,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1018
                                            uint parallel_gc_threads);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1019
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1020
  // Add dense prefix update tasks to the task queue.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1021
  static void enqueue_dense_prefix_tasks(GCTaskQueue* q,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1022
                                         uint parallel_gc_threads);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1023
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1024
  // Add region stealing tasks to the task queue.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1025
  static void enqueue_region_stealing_tasks(
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1026
                                       GCTaskQueue* q,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1027
                                       ParallelTaskTerminator* terminator_ptr,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1028
                                       uint parallel_gc_threads);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1029
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1030
  // If objects are left in eden after a collection, try to move the boundary
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1031
  // and absorb them into the old gen.  Returns true if eden was emptied.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1032
  static bool absorb_live_data_from_eden(PSAdaptiveSizePolicy* size_policy,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1033
                                         PSYoungGen* young_gen,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1034
                                         PSOldGen* old_gen);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1035
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1036
  // Reset time since last full gc
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1037
  static void reset_millis_since_last_gc();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1038
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1039
 protected:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1040
#ifdef VALIDATE_MARK_SWEEP
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1041
  static GrowableArray<void*>*           _root_refs_stack;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1042
  static GrowableArray<oop> *            _live_oops;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1043
  static GrowableArray<oop> *            _live_oops_moved_to;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1044
  static GrowableArray<size_t>*          _live_oops_size;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1045
  static size_t                          _live_oops_index;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1046
  static size_t                          _live_oops_index_at_perm;
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1047
  static GrowableArray<void*>*           _other_refs_stack;
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1048
  static GrowableArray<void*>*           _adjusted_pointers;
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1049
  static bool                            _pointer_tracking;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1050
  static bool                            _root_tracking;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1051
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1052
  // The following arrays are saved since the time of the last GC and
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1053
  // assist in tracking down problems where someone has done an errant
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1054
  // store into the heap, usually to an oop that wasn't properly
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1055
  // handleized across a GC. If we crash or otherwise fail before the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1056
  // next GC, we can query these arrays to find out the object we had
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1057
  // intended to do the store to (assuming it is still alive) and the
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1058
  // offset within that object. Covered under RecordMarkSweepCompaction.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1059
  static GrowableArray<HeapWord*> *      _cur_gc_live_oops;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1060
  static GrowableArray<HeapWord*> *      _cur_gc_live_oops_moved_to;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1061
  static GrowableArray<size_t>*          _cur_gc_live_oops_size;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1062
  static GrowableArray<HeapWord*> *      _last_gc_live_oops;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1063
  static GrowableArray<HeapWord*> *      _last_gc_live_oops_moved_to;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1064
  static GrowableArray<size_t>*          _last_gc_live_oops_size;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1065
#endif
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1066
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1067
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1068
  class MarkAndPushClosure: public OopClosure {
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1069
   private:
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1070
    ParCompactionManager* _compaction_manager;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1071
   public:
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1072
    MarkAndPushClosure(ParCompactionManager* cm) : _compaction_manager(cm) { }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1073
    virtual void do_oop(oop* p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1074
    virtual void do_oop(narrowOop* p);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1075
  };
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1076
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1077
  PSParallelCompact();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1078
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1079
  // Convenient accessor for Universe::heap().
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1080
  static ParallelScavengeHeap* gc_heap() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1081
    return (ParallelScavengeHeap*)Universe::heap();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1082
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1083
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1084
  static void invoke(bool maximum_heap_compaction);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1085
  static void invoke_no_policy(bool maximum_heap_compaction);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1086
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1087
  static void post_initialize();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1088
  // Perform initialization for PSParallelCompact that requires
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1089
  // allocations.  This should be called during the VM initialization
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1090
  // at a pointer where it would be appropriate to return a JNI_ENOMEM
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1091
  // in the event of a failure.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1092
  static bool initialize();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1093
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1094
  // Public accessors
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1095
  static elapsedTimer* accumulated_time() { return &_accumulated_time; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1096
  static unsigned int total_invocations() { return _total_invocations; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1097
  static CollectorCounters* counters()    { return _counters; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1098
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1099
  // Used to add tasks
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1100
  static GCTaskManager* const gc_task_manager();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1101
  static klassOop updated_int_array_klass_obj() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1102
    return _updated_int_array_klass_obj;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1103
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1104
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1105
  // Marking support
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1106
  static inline bool mark_obj(oop obj);
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1107
  // Check mark and maybe push on marking stack
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1108
  template <class T> static inline void mark_and_push(ParCompactionManager* cm,
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1109
                                                      T* p);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1110
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1111
  // Compaction support.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1112
  // Return true if p is in the range [beg_addr, end_addr).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1113
  static inline bool is_in(HeapWord* p, HeapWord* beg_addr, HeapWord* end_addr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1114
  static inline bool is_in(oop* p, HeapWord* beg_addr, HeapWord* end_addr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1115
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1116
  // Convenience wrappers for per-space data kept in _space_info.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1117
  static inline MutableSpace*     space(SpaceId space_id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1118
  static inline HeapWord*         new_top(SpaceId space_id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1119
  static inline HeapWord*         dense_prefix(SpaceId space_id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1120
  static inline ObjectStartArray* start_array(SpaceId space_id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1121
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1122
  // Return true if the klass should be updated.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1123
  static inline bool should_update_klass(klassOop k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1124
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1125
  // Move and update the live objects in the specified space.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1126
  static void move_and_update(ParCompactionManager* cm, SpaceId space_id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1127
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1128
  // Process the end of the given region range in the dense prefix.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1129
  // This includes saving any object not updated.
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1130
  static void dense_prefix_regions_epilogue(ParCompactionManager* cm,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1131
                                            size_t region_start_index,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1132
                                            size_t region_end_index,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1133
                                            idx_t exiting_object_offset,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1134
                                            idx_t region_offset_start,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1135
                                            idx_t region_offset_end);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1136
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1137
  // Update a region in the dense prefix.  For each live object
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1138
  // in the region, update it's interior references.  For each
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1139
  // dead object, fill it with deadwood. Dead space at the end
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1140
  // of a region range will be filled to the start of the next
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1141
  // live object regardless of the region_index_end.  None of the
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1142
  // objects in the dense prefix move and dead space is dead
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1143
  // (holds only dead objects that don't need any processing), so
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1144
  // dead space can be filled in any order.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1145
  static void update_and_deadwood_in_dense_prefix(ParCompactionManager* cm,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1146
                                                  SpaceId space_id,
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1147
                                                  size_t region_index_start,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1148
                                                  size_t region_index_end);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1149
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1150
  // Return the address of the count + 1st live word in the range [beg, end).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1151
  static HeapWord* skip_live_words(HeapWord* beg, HeapWord* end, size_t count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1152
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1153
  // Return the address of the word to be copied to dest_addr, which must be
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1154
  // aligned to a region boundary.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1155
  static HeapWord* first_src_addr(HeapWord* const dest_addr,
1669
c921639400dd 6765745: par compact - allow young gen spaces to be split
jcoomes
parents: 1668
diff changeset
  1156
                                  SpaceId src_space_id,
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1157
                                  size_t src_region_idx);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1158
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1159
  // Determine the next source region, set closure.source() to the start of the
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1160
  // new region return the region index.  Parameter end_addr is the address one
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1161
  // beyond the end of source range just processed.  If necessary, switch to a
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1162
  // new source space and set src_space_id (in-out parameter) and src_space_top
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1163
  // (out parameter) accordingly.
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1164
  static size_t next_src_region(MoveAndUpdateClosure& closure,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1165
                                SpaceId& src_space_id,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1166
                                HeapWord*& src_space_top,
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1167
                                HeapWord* end_addr);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1168
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1169
  // Decrement the destination count for each non-empty source region in the
1682
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1170
  // range [beg_region, region(region_align_up(end_addr))).  If the destination
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1171
  // count for a region goes to 0 and it needs to be filled, enqueue it.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1172
  static void decrement_destination_counts(ParCompactionManager* cm,
1682
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1173
                                           SpaceId src_space_id,
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1174
                                           size_t beg_region,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1175
                                           HeapWord* end_addr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1176
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1177
  // Fill a region, copying objects from one or more source regions.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1178
  static void fill_region(ParCompactionManager* cm, size_t region_idx);
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1179
  static void fill_and_update_region(ParCompactionManager* cm, size_t region) {
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1180
    fill_region(cm, region);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1181
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1182
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1183
  // Update the deferred objects in the space.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1184
  static void update_deferred_objects(ParCompactionManager* cm, SpaceId id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1185
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1186
  // Mark pointer and follow contents.
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1187
  template <class T>
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1188
  static inline void mark_and_follow(ParCompactionManager* cm, T* p);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1189
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1190
  static ParMarkBitMap* mark_bitmap() { return &_mark_bitmap; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1191
  static ParallelCompactData& summary_data() { return _summary_data; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1192
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1193
  static inline void adjust_pointer(oop* p)       { adjust_pointer(p, false); }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1194
  static inline void adjust_pointer(narrowOop* p) { adjust_pointer(p, false); }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1195
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1196
  // Reference Processing
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1197
  static ReferenceProcessor* const ref_processor() { return _ref_processor; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1198
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1199
  // Return the SpaceId for the given address.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1200
  static SpaceId space_id(HeapWord* addr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1201
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1202
  // Time since last full gc (in milliseconds).
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1203
  static jlong millis_since_last_gc();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1204
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1205
#ifdef VALIDATE_MARK_SWEEP
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1206
  static void track_adjusted_pointer(void* p, bool isroot);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1207
  static void check_adjust_pointer(void* p);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1208
  static void track_interior_pointers(oop obj);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1209
  static void check_interior_pointers();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1210
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1211
  static void reset_live_oop_tracking(bool at_perm);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1212
  static void register_live_oop(oop p, size_t size);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1213
  static void validate_live_oop(oop p, size_t size);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1214
  static void live_oop_moved_to(HeapWord* q, size_t size, HeapWord* compaction_top);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1215
  static void compaction_complete();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1216
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1217
  // Querying operation of RecordMarkSweepCompaction results.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1218
  // Finds and prints the current base oop and offset for a word
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1219
  // within an oop that was live during the last GC. Helpful for
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1220
  // tracking down heap stomps.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1221
  static void print_new_location_of_heap_address(HeapWord* q);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1222
#endif  // #ifdef VALIDATE_MARK_SWEEP
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1223
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1224
  // Call backs for class unloading
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1225
  // Update subklass/sibling/implementor links at end of marking.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1226
  static void revisit_weak_klass_link(ParCompactionManager* cm, Klass* k);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1227
3696
9e5d9b5e1049 4957990: Perm heap bloat in JVM
ysr
parents: 2105
diff changeset
  1228
  // Clear unmarked oops in MDOs at the end of marking.
9e5d9b5e1049 4957990: Perm heap bloat in JVM
ysr
parents: 2105
diff changeset
  1229
  static void revisit_mdo(ParCompactionManager* cm, DataLayout* p);
9e5d9b5e1049 4957990: Perm heap bloat in JVM
ysr
parents: 2105
diff changeset
  1230
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1231
#ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1232
  // Debugging support.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1233
  static const char* space_names[last_space_id];
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1234
  static void print_region_ranges();
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1235
  static void print_dense_prefix_stats(const char* const algorithm,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1236
                                       const SpaceId id,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1237
                                       const bool maximum_compaction,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1238
                                       HeapWord* const addr);
1669
c921639400dd 6765745: par compact - allow young gen spaces to be split
jcoomes
parents: 1668
diff changeset
  1239
  static void summary_phase_msg(SpaceId dst_space_id,
c921639400dd 6765745: par compact - allow young gen spaces to be split
jcoomes
parents: 1668
diff changeset
  1240
                                HeapWord* dst_beg, HeapWord* dst_end,
c921639400dd 6765745: par compact - allow young gen spaces to be split
jcoomes
parents: 1668
diff changeset
  1241
                                SpaceId src_space_id,
c921639400dd 6765745: par compact - allow young gen spaces to be split
jcoomes
parents: 1668
diff changeset
  1242
                                HeapWord* src_beg, HeapWord* src_end);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1243
#endif  // #ifndef PRODUCT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1244
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1245
#ifdef  ASSERT
1682
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1246
  // Sanity check the new location of a word in the heap.
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1247
  static inline void check_new_location(HeapWord* old_addr, HeapWord* new_addr);
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1248
  // Verify that all the regions have been emptied.
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1249
  static void verify_complete(SpaceId space_id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1250
#endif  // #ifdef ASSERT
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1251
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1252
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1253
inline bool PSParallelCompact::mark_obj(oop obj) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1254
  const int obj_size = obj->size();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1255
  if (mark_bitmap()->mark_obj(obj, obj_size)) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1256
    _summary_data.add_obj(obj, obj_size);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1257
    return true;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1258
  } else {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1259
    return false;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1260
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1261
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1262
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1263
template <class T>
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1264
inline void PSParallelCompact::follow_root(ParCompactionManager* cm, T* p) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1265
  assert(!Universe::heap()->is_in_reserved(p),
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1266
         "roots shouldn't be things within the heap");
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1267
#ifdef VALIDATE_MARK_SWEEP
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1268
  if (ValidateMarkSweep) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1269
    guarantee(!_root_refs_stack->contains(p), "should only be in here once");
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1270
    _root_refs_stack->push(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1271
  }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1272
#endif
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1273
  T heap_oop = oopDesc::load_heap_oop(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1274
  if (!oopDesc::is_null(heap_oop)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1275
    oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1276
    if (mark_bitmap()->is_unmarked(obj)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1277
      if (mark_obj(obj)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1278
        obj->follow_contents(cm);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1279
      }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1280
    }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1281
  }
5076
8b74a4b60b31 4396719: Mark Sweep stack overflow on deeply nested Object arrays
jcoomes
parents: 3912
diff changeset
  1282
  cm->follow_marking_stacks();
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1283
}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1284
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1285
template <class T>
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1286
inline void PSParallelCompact::mark_and_follow(ParCompactionManager* cm,
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1287
                                               T* p) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1288
  T heap_oop = oopDesc::load_heap_oop(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1289
  if (!oopDesc::is_null(heap_oop)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1290
    oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1291
    if (mark_bitmap()->is_unmarked(obj)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1292
      if (mark_obj(obj)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1293
        obj->follow_contents(cm);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1294
      }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1295
    }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1296
  }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1297
}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1298
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1299
template <class T>
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1300
inline void PSParallelCompact::mark_and_push(ParCompactionManager* cm, T* p) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1301
  T heap_oop = oopDesc::load_heap_oop(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1302
  if (!oopDesc::is_null(heap_oop)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1303
    oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
5918
73b96456819a 6957084: simplify TaskQueue overflow handling
jcoomes
parents: 5702
diff changeset
  1304
    if (mark_bitmap()->is_unmarked(obj) && mark_obj(obj)) {
73b96456819a 6957084: simplify TaskQueue overflow handling
jcoomes
parents: 5702
diff changeset
  1305
      cm->push(obj);
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1306
    }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1307
  }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1308
}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1309
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1310
template <class T>
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1311
inline void PSParallelCompact::adjust_pointer(T* p, bool isroot) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1312
  T heap_oop = oopDesc::load_heap_oop(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1313
  if (!oopDesc::is_null(heap_oop)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1314
    oop obj     = oopDesc::decode_heap_oop_not_null(heap_oop);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1315
    oop new_obj = (oop)summary_data().calc_new_pointer(obj);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1316
    assert(new_obj != NULL ||                     // is forwarding ptr?
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1317
           obj->is_shared(),                      // never forwarded?
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1318
           "should be forwarded");
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1319
    // Just always do the update unconditionally?
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1320
    if (new_obj != NULL) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1321
      assert(Universe::heap()->is_in_reserved(new_obj),
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1322
             "should be in object space");
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1323
      oopDesc::encode_store_heap_oop_not_null(p, new_obj);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1324
    }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1325
  }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1326
  VALIDATE_MARK_SWEEP_ONLY(track_adjusted_pointer(p, isroot));
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1327
}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1328
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1329
template <class T>
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1330
inline void PSParallelCompact::KeepAliveClosure::do_oop_work(T* p) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1331
#ifdef VALIDATE_MARK_SWEEP
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1332
  if (ValidateMarkSweep) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1333
    if (!Universe::heap()->is_in_reserved(p)) {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1334
      _root_refs_stack->push(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1335
    } else {
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1336
      _other_refs_stack->push(p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1337
    }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1338
  }
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1339
#endif
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1340
  mark_and_push(_compaction_manager, p);
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1341
}
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1342
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1343
inline bool PSParallelCompact::print_phases() {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1344
  return _print_phases;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1345
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1346
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1347
inline double PSParallelCompact::normal_distribution(double density) {
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1348
  assert(_dwl_initialized, "uninitialized");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1349
  const double squared_term = (density - _dwl_mean) / _dwl_std_dev;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1350
  return _dwl_first_term * exp(-0.5 * squared_term * squared_term);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1351
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1352
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1353
inline bool
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1354
PSParallelCompact::dead_space_crosses_boundary(const RegionData* region,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1355
                                               idx_t bit)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1356
{
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1357
  assert(bit > 0, "cannot call this for the first bit/region");
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1358
  assert(_summary_data.region_to_addr(region) == _mark_bitmap.bit_to_addr(bit),
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1359
         "sanity check");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1360
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1361
  // Dead space crosses the boundary if (1) a partial object does not extend
1407
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1362
  // onto the region, (2) an object does not start at the beginning of the
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1363
  // region, and (3) an object does not end at the end of the prior region.
9006b01ba3fd 6725697: par compact - rename class ChunkData to RegionData
jcoomes
parents: 977
diff changeset
  1364
  return region->partial_obj_size() == 0 &&
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1365
    !_mark_bitmap.is_obj_beg(bit) &&
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1366
    !_mark_bitmap.is_obj_end(bit - 1);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1367
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1368
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1369
inline bool
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1370
PSParallelCompact::is_in(HeapWord* p, HeapWord* beg_addr, HeapWord* end_addr) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1371
  return p >= beg_addr && p < end_addr;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1372
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1373
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1374
inline bool
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1375
PSParallelCompact::is_in(oop* p, HeapWord* beg_addr, HeapWord* end_addr) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1376
  return is_in((HeapWord*)p, beg_addr, end_addr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1377
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1378
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1379
inline MutableSpace* PSParallelCompact::space(SpaceId id) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1380
  assert(id < last_space_id, "id out of range");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1381
  return _space_info[id].space();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1382
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1383
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1384
inline HeapWord* PSParallelCompact::new_top(SpaceId id) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1385
  assert(id < last_space_id, "id out of range");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1386
  return _space_info[id].new_top();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1387
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1388
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1389
inline HeapWord* PSParallelCompact::dense_prefix(SpaceId id) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1390
  assert(id < last_space_id, "id out of range");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1391
  return _space_info[id].dense_prefix();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1392
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1393
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1394
inline ObjectStartArray* PSParallelCompact::start_array(SpaceId id) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1395
  assert(id < last_space_id, "id out of range");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1396
  return _space_info[id].start_array();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1397
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1398
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1399
inline bool PSParallelCompact::should_update_klass(klassOop k) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1400
  return ((HeapWord*) k) >= dense_prefix(perm_space_id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1401
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1402
1682
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1403
#ifdef ASSERT
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1404
inline void
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1405
PSParallelCompact::check_new_location(HeapWord* old_addr, HeapWord* new_addr)
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1406
{
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1407
  assert(old_addr >= new_addr || space_id(old_addr) != space_id(new_addr),
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1408
         "must move left or to a different space");
5694
1e0532a6abff 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents: 5076
diff changeset
  1409
  assert(is_object_aligned((intptr_t)old_addr) && is_object_aligned((intptr_t)new_addr),
1e0532a6abff 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents: 5076
diff changeset
  1410
         "checking alignment");
1682
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1411
}
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1412
#endif // ASSERT
94ad5692b3a7 6784849: par compact - can fail when to_space is non-empty
jcoomes
parents: 1670
diff changeset
  1413
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1414
class MoveAndUpdateClosure: public ParMarkBitMapClosure {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1415
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1416
  inline MoveAndUpdateClosure(ParMarkBitMap* bitmap, ParCompactionManager* cm,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1417
                              ObjectStartArray* start_array,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1418
                              HeapWord* destination, size_t words);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1419
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1420
  // Accessors.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1421
  HeapWord* destination() const         { return _destination; }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1422
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1423
  // If the object will fit (size <= words_remaining()), copy it to the current
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1424
  // destination, update the interior oops and the start array and return either
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1425
  // full (if the closure is full) or incomplete.  If the object will not fit,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1426
  // return would_overflow.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1427
  virtual IterationStatus do_addr(HeapWord* addr, size_t size);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1428
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1429
  // Copy enough words to fill this closure, starting at source().  Interior
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1430
  // oops and the start array are not updated.  Return full.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1431
  IterationStatus copy_until_full();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1432
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1433
  // Copy enough words to fill this closure or to the end of an object,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1434
  // whichever is smaller, starting at source().  Interior oops and the start
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1435
  // array are not updated.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1436
  void copy_partial_obj();
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1437
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1438
 protected:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1439
  // Update variables to indicate that word_count words were processed.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1440
  inline void update_state(size_t word_count);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1441
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1442
 protected:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1443
  ObjectStartArray* const _start_array;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1444
  HeapWord*               _destination;         // Next addr to be written.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1445
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1446
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1447
inline
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1448
MoveAndUpdateClosure::MoveAndUpdateClosure(ParMarkBitMap* bitmap,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1449
                                           ParCompactionManager* cm,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1450
                                           ObjectStartArray* start_array,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1451
                                           HeapWord* destination,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1452
                                           size_t words) :
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1453
  ParMarkBitMapClosure(bitmap, cm, words), _start_array(start_array)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1454
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1455
  _destination = destination;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1456
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1457
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1458
inline void MoveAndUpdateClosure::update_state(size_t words)
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1459
{
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1460
  decrement_words_remaining(words);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1461
  _source += words;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1462
  _destination += words;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1463
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1464
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1465
class UpdateOnlyClosure: public ParMarkBitMapClosure {
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1466
 private:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1467
  const PSParallelCompact::SpaceId _space_id;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1468
  ObjectStartArray* const          _start_array;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1469
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1470
 public:
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1471
  UpdateOnlyClosure(ParMarkBitMap* mbm,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1472
                    ParCompactionManager* cm,
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1473
                    PSParallelCompact::SpaceId space_id);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1474
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1475
  // Update the object.
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1476
  virtual IterationStatus do_addr(HeapWord* addr, size_t words);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1477
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1478
  inline void do_addr(HeapWord* addr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1479
};
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1480
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1481
inline void UpdateOnlyClosure::do_addr(HeapWord* addr)
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1482
{
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1483
  _start_array->allocate_block(addr);
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1484
  oop(addr)->update_contents(compaction_manager());
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1485
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1486
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1487
class FillClosure: public ParMarkBitMapClosure
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1488
{
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1489
public:
360
21d113ecbf6a 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 1
diff changeset
  1490
  FillClosure(ParCompactionManager* cm, PSParallelCompact::SpaceId space_id) :
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1491
    ParMarkBitMapClosure(PSParallelCompact::mark_bitmap(), cm),
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1492
    _start_array(PSParallelCompact::start_array(space_id))
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1493
  {
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1494
    assert(space_id == PSParallelCompact::perm_space_id ||
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1495
           space_id == PSParallelCompact::old_space_id,
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1496
           "cannot use FillClosure in the young gen");
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1497
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1498
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1499
  virtual IterationStatus do_addr(HeapWord* addr, size_t size) {
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1500
    CollectedHeap::fill_with_objects(addr, size);
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1501
    HeapWord* const end = addr + size;
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1502
    do {
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1503
      _start_array->allocate_block(addr);
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1504
      addr += oop(addr)->size();
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1408
diff changeset
  1505
    } while (addr < end);
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1506
    return ParMarkBitMap::incomplete;
489c9b5090e2 Initial load
duke
parents:
diff changeset
  1507
  }
489c9b5090e2 Initial load
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private:
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  ObjectStartArray* const _start_array;
1
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};
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#endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSPARALLELCOMPACT_HPP