1 /* 2 * Copyright (c) 2001, 2018, 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 #include "precompiled.hpp" 26 #include "gc/g1/g1FromCardCache.hpp" 27 #include "gc/g1/g1RemSet.hpp" 28 #include "memory/padded.inline.hpp" 29 #include "utilities/debug.hpp" 30 31 uintptr_t** G1FromCardCache::_cache = NULL; 32 uint G1FromCardCache::_max_regions = 0; 33 size_t G1FromCardCache::_static_mem_size = 0; 34 #ifdef ASSERT 35 uint G1FromCardCache::_max_workers = 0; 36 #endif 37 38 void G1FromCardCache::initialize(uint num_par_rem_sets, uint max_num_regions) { 39 guarantee(max_num_regions > 0, "Heap size must be valid"); 40 guarantee(_cache == NULL, "Should not call this multiple times"); 41 42 _max_regions = max_num_regions; 43 #ifdef ASSERT 44 _max_workers = num_par_rem_sets; 45 #endif 46 _cache = Padded2DArray<uintptr_t, mtGC>::create_unfreeable(_max_regions, 47 num_par_rem_sets, 48 &_static_mem_size); 49 } 50 51 void G1FromCardCache::invalidate(uint start_idx, size_t new_num_regions) { 52 guarantee((size_t)start_idx + new_num_regions <= max_uintx, 53 "Trying to invalidate beyond maximum region, from %u size " SIZE_FORMAT, 54 start_idx, new_num_regions); 55 uint end_idx = (start_idx + (uint)new_num_regions); 56 assert(end_idx <= _max_regions, "Must be within max."); 57 58 for (uint i = 0; i < G1RemSet::num_par_rem_sets(); i++) { 59 for (uint j = start_idx; j < end_idx; j++) { 60 set(i, j, InvalidCard); 61 } 62 } 63 } 64 65 #ifndef PRODUCT 66 void G1FromCardCache::print(outputStream* out) { 67 for (uint i = 0; i < G1RemSet::num_par_rem_sets(); i++) { 68 for (uint j = 0; j < _max_regions; j++) { 69 out->print_cr("_from_card_cache[%u][%u] = " SIZE_FORMAT ".", 70 i, j, at(i, j)); 71 } 72 } 73 } 74 #endif 75 76 void G1FromCardCache::clear(uint region_idx) { 77 uint num_par_remsets = G1RemSet::num_par_rem_sets(); 78 for (uint i = 0; i < num_par_remsets; i++) { 79 set(i, region_idx, InvalidCard); 80 } 81 }