1 /* 2 * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_GC_SHARED_BLOCKOFFSETTABLE_INLINE_HPP 26 #define SHARE_VM_GC_SHARED_BLOCKOFFSETTABLE_INLINE_HPP 27 28 #include "gc/shared/blockOffsetTable.hpp" 29 #include "gc/shared/space.hpp" 30 #include "runtime/safepoint.hpp" 31 32 ////////////////////////////////////////////////////////////////////////// 33 // BlockOffsetTable inlines 34 ////////////////////////////////////////////////////////////////////////// 35 inline HeapWord* BlockOffsetTable::block_start(const void* addr) const { 36 if (addr >= _bottom && addr < _end) { 37 return block_start_unsafe(addr); 38 } else { 39 return NULL; 40 } 41 } 42 43 ////////////////////////////////////////////////////////////////////////// 44 // BlockOffsetSharedArray inlines 45 ////////////////////////////////////////////////////////////////////////// 46 inline size_t BlockOffsetSharedArray::index_for(const void* p) const { 47 char* pc = (char*)p; 48 assert(pc >= (char*)_reserved.start() && 49 pc < (char*)_reserved.end(), 50 "p not in range."); 51 size_t delta = pointer_delta(pc, _reserved.start(), sizeof(char)); 52 size_t result = delta >> LogN; 53 assert(result < _vs.committed_size(), "bad index from address"); 54 return result; 55 } 56 57 inline HeapWord* BlockOffsetSharedArray::address_for_index(size_t index) const { 58 assert(index < _vs.committed_size(), "bad index"); 59 HeapWord* result = _reserved.start() + (index << LogN_words); 60 assert(result >= _reserved.start() && result < _reserved.end(), 61 "bad address from index"); 62 return result; 63 } 64 65 inline void BlockOffsetSharedArray::check_reducing_assertion(bool reducing) { 66 assert(reducing || !SafepointSynchronize::is_at_safepoint() || init_to_zero() || 67 Thread::current()->is_VM_thread() || 68 Thread::current()->is_ConcurrentGC_thread() || 69 ((!Thread::current()->is_ConcurrentGC_thread()) && 70 ParGCRareEvent_lock->owned_by_self()) || 71 // Under PMS, the worker threads, as opposed to the VM thread will update BOT. 72 (Thread::current()->is_GangWorker_thread() && CMSParallelFullGC), 73 "Crack"); 74 } 75 76 ////////////////////////////////////////////////////////////////////////// 77 // BlockOffsetArrayNonContigSpace inlines 78 ////////////////////////////////////////////////////////////////////////// 79 inline void BlockOffsetArrayNonContigSpace::freed(HeapWord* blk, 80 size_t size) { 81 freed(blk, blk + size); 82 } 83 84 inline void BlockOffsetArrayNonContigSpace::freed(HeapWord* blk_start, 85 HeapWord* blk_end) { 86 // Verify that the BOT shows [blk_start, blk_end) to be one block. 87 verify_single_block(blk_start, blk_end); 88 // adjust _unallocated_block upward or downward 89 // as appropriate 90 if (BlockOffsetArrayUseUnallocatedBlock) { 91 assert(_unallocated_block <= _end, 92 "Inconsistent value for _unallocated_block"); 93 if (blk_end >= _unallocated_block && blk_start <= _unallocated_block) { 94 // CMS-specific note: a block abutting _unallocated_block to 95 // its left is being freed, a new block is being added or 96 // we are resetting following a compaction 97 _unallocated_block = blk_start; 98 } 99 } 100 } 101 102 #endif // SHARE_VM_GC_SHARED_BLOCKOFFSETTABLE_INLINE_HPP