jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/g1BlockOffsetTable.inline.hpp@7ea5ca260b28 (annotated)

src/share/vm/gc_implementation/g1/g1BlockOffsetTable.inline.hpp@7ea5ca260b28 (annotated)

src/share/vm/gc_implementation/g1/g1BlockOffsetTable.inline.hpp

Sat, 07 Mar 2009 11:07:37 -0500

author: tonyp
date: Sat, 07 Mar 2009 11:07:37 -0500
changeset 1054: 7ea5ca260b28
parent 777: 37f87013dfd8
child 1280: df6caf649ff7
permissions: -rw-r--r--

6814467: G1: small fixes related to concurrent marking verboseness
Summary: A few small fixes to remove some inconsistencies in the concurrent mark-related verbose GC output.
Reviewed-by: jmasa

 /*
  * Copyright 2001-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 inline HeapWord* G1BlockOffsetTable::block_start(const void* addr) {
   if (addr >= _bottom && addr < _end) {
     return block_start_unsafe(addr);
   } else {
     return NULL;
   }
 }
 inline HeapWord*
 G1BlockOffsetTable::block_start_const(const void* addr) const {
   if (addr >= _bottom && addr < _end) {
     return block_start_unsafe_const(addr);
   } else {
     return NULL;
   }
 }
 inline size_t G1BlockOffsetSharedArray::index_for(const void* p) const {
   char* pc = (char*)p;
   assert(pc >= (char*)_reserved.start() &&
          pc <  (char*)_reserved.end(),
          "p not in range.");
   size_t delta = pointer_delta(pc, _reserved.start(), sizeof(char));
   size_t result = delta >> LogN;
   assert(result < _vs.committed_size(), "bad index from address");
   return result;
 }
 inline HeapWord*
 G1BlockOffsetSharedArray::address_for_index(size_t index) const {
   assert(index < _vs.committed_size(), "bad index");
   HeapWord* result = _reserved.start() + (index << LogN_words);
   assert(result >= _reserved.start() && result < _reserved.end(),
          "bad address from index");
   return result;
 }
 inline HeapWord*
 G1BlockOffsetArray::block_at_or_preceding(const void* addr,
                                           bool has_max_index,
                                           size_t max_index) const {
   assert(_array->offset_array(0) == 0, "objects can't cross covered areas");
   size_t index = _array->index_for(addr);
   // We must make sure that the offset table entry we use is valid.  If
   // "addr" is past the end, start at the last known one and go forward.
   if (has_max_index) {
     index = MIN2(index, max_index);
   }
   HeapWord* q = _array->address_for_index(index);
   uint offset = _array->offset_array(index);  // Extend u_char to uint.
   while (offset >= N_words) {
     // The excess of the offset from N_words indicates a power of Base
     // to go back by.
     size_t n_cards_back = BlockOffsetArray::entry_to_cards_back(offset);
     q -= (N_words * n_cards_back);
     assert(q >= _sp->bottom(), "Went below bottom!");
     index -= n_cards_back;
     offset = _array->offset_array(index);
   }
   assert(offset < N_words, "offset too large");
   q -= offset;
   return q;
 }
 inline HeapWord*
 G1BlockOffsetArray::
 forward_to_block_containing_addr_const(HeapWord* q, HeapWord* n,
                                        const void* addr) const {
   if (csp() != NULL) {
     if (addr >= csp()->top()) return csp()->top();
     while (n <= addr) {
       q = n;
       oop obj = oop(q);
       if (obj->klass() == NULL) return q;
       n += obj->size();
     }
   } else {
     while (n <= addr) {
       q = n;
       oop obj = oop(q);
       if (obj->klass() == NULL) return q;
       n += _sp->block_size(q);
     }
   }
   assert(q <= n, "wrong order for q and addr");
   assert(addr < n, "wrong order for addr and n");
   return q;
 }
 inline HeapWord*
 G1BlockOffsetArray::forward_to_block_containing_addr(HeapWord* q,
                                                      const void* addr) {
   if (oop(q)->klass() == NULL) return q;
   HeapWord* n = q + _sp->block_size(q);
   // In the normal case, where the query "addr" is a card boundary, and the
   // offset table chunks are the same size as cards, the block starting at
   // "q" will contain addr, so the test below will fail, and we'll fall
   // through quickly.
   if (n <= addr) {
     q = forward_to_block_containing_addr_slow(q, n, addr);
   }
   assert(q <= addr, "wrong order for current and arg");
   return q;
 }
 //////////////////////////////////////////////////////////////////////////
 // BlockOffsetArrayNonContigSpace inlines
 //////////////////////////////////////////////////////////////////////////
 inline void G1BlockOffsetArray::freed(HeapWord* blk_start, HeapWord* blk_end) {
   // Verify that the BOT shows [blk_start, blk_end) to be one block.
   verify_single_block(blk_start, blk_end);
   // adjust _unallocated_block upward or downward
   // as appropriate
   if (BlockOffsetArrayUseUnallocatedBlock) {
     assert(_unallocated_block <= _end,
            "Inconsistent value for _unallocated_block");
     if (blk_end >= _unallocated_block && blk_start <= _unallocated_block) {
       // CMS-specific note: a block abutting _unallocated_block to
       // its left is being freed, a new block is being added or
       // we are resetting following a compaction
       _unallocated_block = blk_start;
     }
   }
 }
 inline void G1BlockOffsetArray::freed(HeapWord* blk, size_t size) {
   freed(blk, blk + size);
 }

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src/share/vm/gc_implementation/g1/g1BlockOffsetTable.inline.hpp@7ea5ca260b28 (annotated)

src/share/vm/gc_implementation/g1/g1BlockOffsetTable.inline.hpp