diff -r ef437ea56651 -r aaf61e68b255 src/share/vm/gc_implementation/parNew/parGCAllocBuffer.hpp
--- a/src/share/vm/gc_implementation/parNew/parGCAllocBuffer.hpp	Fri Aug 03 13:24:02 2012 -0700
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,249 +0,0 @@
-/*
- * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- *
- */
-
-#ifndef SHARE_VM_GC_IMPLEMENTATION_PARNEW_PARGCALLOCBUFFER_HPP
-#define SHARE_VM_GC_IMPLEMENTATION_PARNEW_PARGCALLOCBUFFER_HPP
-
-#include "memory/allocation.hpp"
-#include "memory/blockOffsetTable.hpp"
-#include "memory/threadLocalAllocBuffer.hpp"
-#include "utilities/globalDefinitions.hpp"
-
-// Forward decl.
-
-class PLABStats;
-
-// A per-thread allocation buffer used during GC.
-class ParGCAllocBuffer: public CHeapObj<mtGC> {
-protected:
-  char head[32];
-  size_t _word_sz;          // in HeapWord units
-  HeapWord* _bottom;
-  HeapWord* _top;
-  HeapWord* _end;       // last allocatable address + 1
-  HeapWord* _hard_end;  // _end + AlignmentReserve
-  bool      _retained;  // whether we hold a _retained_filler
-  MemRegion _retained_filler;
-  // In support of ergonomic sizing of PLAB's
-  size_t    _allocated;     // in HeapWord units
-  size_t    _wasted;        // in HeapWord units
-  char tail[32];
-  static size_t FillerHeaderSize;
-  static size_t AlignmentReserve;
-
-public:
-  // Initializes the buffer to be empty, but with the given "word_sz".
-  // Must get initialized with "set_buf" for an allocation to succeed.
-  ParGCAllocBuffer(size_t word_sz);
-
-  static const size_t min_size() {
-    return ThreadLocalAllocBuffer::min_size();
-  }
-
-  static const size_t max_size() {
-    return ThreadLocalAllocBuffer::max_size();
-  }
-
-  // If an allocation of the given "word_sz" can be satisfied within the
-  // buffer, do the allocation, returning a pointer to the start of the
-  // allocated block.  If the allocation request cannot be satisfied,
-  // return NULL.
-  HeapWord* allocate(size_t word_sz) {
-    HeapWord* res = _top;
-    if (pointer_delta(_end, _top) >= word_sz) {
-      _top = _top + word_sz;
-      return res;
-    } else {
-      return NULL;
-    }
-  }
-
-  // Undo the last allocation in the buffer, which is required to be of the
-  // "obj" of the given "word_sz".
-  void undo_allocation(HeapWord* obj, size_t word_sz) {
-    assert(pointer_delta(_top, _bottom) >= word_sz, "Bad undo");
-    assert(pointer_delta(_top, obj)     == word_sz, "Bad undo");
-    _top = obj;
-  }
-
-  // The total (word) size of the buffer, including both allocated and
-  // unallocted space.
-  size_t word_sz() { return _word_sz; }
-
-  // Should only be done if we are about to reset with a new buffer of the
-  // given size.
-  void set_word_size(size_t new_word_sz) {
-    assert(new_word_sz > AlignmentReserve, "Too small");
-    _word_sz = new_word_sz;
-  }
-
-  // The number of words of unallocated space remaining in the buffer.
-  size_t words_remaining() {
-    assert(_end >= _top, "Negative buffer");
-    return pointer_delta(_end, _top, HeapWordSize);
-  }
-
-  bool contains(void* addr) {
-    return (void*)_bottom <= addr && addr < (void*)_hard_end;
-  }
-
-  // Sets the space of the buffer to be [buf, space+word_sz()).
-  void set_buf(HeapWord* buf) {
-    _bottom   = buf;
-    _top      = _bottom;
-    _hard_end = _bottom + word_sz();
-    _end      = _hard_end - AlignmentReserve;
-    assert(_end >= _top, "Negative buffer");
-    // In support of ergonomic sizing
-    _allocated += word_sz();
-  }
-
-  // Flush the stats supporting ergonomic sizing of PLAB's
-  void flush_stats(PLABStats* stats);
-  void flush_stats_and_retire(PLABStats* stats, bool retain) {
-    // We flush the stats first in order to get a reading of
-    // unused space in the last buffer.
-    if (ResizePLAB) {
-      flush_stats(stats);
-    }
-    // Retire the last allocation buffer.
-    retire(true, retain);
-  }
-
-  // Force future allocations to fail and queries for contains()
-  // to return false
-  void invalidate() {
-    assert(!_retained, "Shouldn't retain an invalidated buffer.");
-    _end    = _hard_end;
-    _wasted += pointer_delta(_end, _top);  // unused  space
-    _top    = _end;      // force future allocations to fail
-    _bottom = _end;      // force future contains() queries to return false
-  }
-
-  // Fills in the unallocated portion of the buffer with a garbage object.
-  // If "end_of_gc" is TRUE, is after the last use in the GC.  IF "retain"
-  // is true, attempt to re-use the unused portion in the next GC.
-  void retire(bool end_of_gc, bool retain);
-
-  void print() PRODUCT_RETURN;
-};
-
-// PLAB stats book-keeping
-class PLABStats VALUE_OBJ_CLASS_SPEC {
-  size_t _allocated;      // total allocated
-  size_t _wasted;         // of which wasted (internal fragmentation)
-  size_t _unused;         // Unused in last buffer
-  size_t _used;           // derived = allocated - wasted - unused
-  size_t _desired_plab_sz;// output of filter (below), suitably trimmed and quantized
-  AdaptiveWeightedAverage
-         _filter;         // integrator with decay
-
- public:
-  PLABStats(size_t desired_plab_sz_, unsigned wt) :
-    _allocated(0),
-    _wasted(0),
-    _unused(0),
-    _used(0),
-    _desired_plab_sz(desired_plab_sz_),
-    _filter(wt)
-  {
-    size_t min_sz = min_size();
-    size_t max_sz = max_size();
-    size_t aligned_min_sz = align_object_size(min_sz);
-    size_t aligned_max_sz = align_object_size(max_sz);
-    assert(min_sz <= aligned_min_sz && max_sz >= aligned_max_sz &&
-           min_sz <= max_sz,
-           "PLAB clipping computation in adjust_desired_plab_sz()"
-           " may be incorrect");
-  }
-
-  static const size_t min_size() {
-    return ParGCAllocBuffer::min_size();
-  }
-
-  static const size_t max_size() {
-    return ParGCAllocBuffer::max_size();
-  }
-
-  size_t desired_plab_sz() {
-    return _desired_plab_sz;
-  }
-
-  void adjust_desired_plab_sz(); // filter computation, latches output to
-                                 // _desired_plab_sz, clears sensor accumulators
-
-  void add_allocated(size_t v) {
-    Atomic::add_ptr(v, &_allocated);
-  }
-
-  void add_unused(size_t v) {
-    Atomic::add_ptr(v, &_unused);
-  }
-
-  void add_wasted(size_t v) {
-    Atomic::add_ptr(v, &_wasted);
-  }
-};
-
-class ParGCAllocBufferWithBOT: public ParGCAllocBuffer {
-  BlockOffsetArrayContigSpace _bt;
-  BlockOffsetSharedArray*     _bsa;
-  HeapWord*                   _true_end;  // end of the whole ParGCAllocBuffer
-
-  static const size_t ChunkSizeInWords;
-  static const size_t ChunkSizeInBytes;
-  HeapWord* allocate_slow(size_t word_sz);
-
-  void fill_region_with_block(MemRegion mr, bool contig);
-
-public:
-  ParGCAllocBufferWithBOT(size_t word_sz, BlockOffsetSharedArray* bsa);
-
-  HeapWord* allocate(size_t word_sz) {
-    HeapWord* res = ParGCAllocBuffer::allocate(word_sz);
-    if (res != NULL) {
-      _bt.alloc_block(res, word_sz);
-    } else {
-      res = allocate_slow(word_sz);
-    }
-    return res;
-  }
-
-  void undo_allocation(HeapWord* obj, size_t word_sz);
-
-  void set_buf(HeapWord* buf_start) {
-    ParGCAllocBuffer::set_buf(buf_start);
-    _true_end = _hard_end;
-    _bt.set_region(MemRegion(buf_start, word_sz()));
-    _bt.initialize_threshold();
-  }
-
-  void retire(bool end_of_gc, bool retain);
-
-  MemRegion range() {
-    return MemRegion(_top, _true_end);
-  }
-};
-
-#endif // SHARE_VM_GC_IMPLEMENTATION_PARNEW_PARGCALLOCBUFFER_HPP