/* * Copyright (c) 2015, 2019, 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. */ #include "precompiled.hpp" #include "gc/z/zPage.inline.hpp" #include "gc/z/zPhysicalMemory.inline.hpp" #include "gc/z/zVirtualMemory.inline.hpp" #include "utilities/align.hpp" #include "utilities/debug.hpp" ZPage::ZPage(const ZVirtualMemory& vmem, const ZPhysicalMemory& pmem) : _type(type_from_size(vmem.size())), _numa_id((uint8_t)-1), _seqnum(0), _virtual(vmem), _top(start()), _livemap(object_max_count()), _last_used(0), _physical(pmem) { assert_initialized(); } ZPage::ZPage(uint8_t type, const ZVirtualMemory& vmem, const ZPhysicalMemory& pmem) : _type(type), _numa_id((uint8_t)-1), _seqnum(0), _virtual(vmem), _top(start()), _livemap(object_max_count()), _last_used(0), _physical(pmem) { assert_initialized(); } void ZPage::assert_initialized() const { assert(!_virtual.is_null(), "Should not be null"); assert(!_physical.is_null(), "Should not be null"); assert((_type == ZPageTypeSmall && size() == ZPageSizeSmall) || (_type == ZPageTypeMedium && size() == ZPageSizeMedium) || (_type == ZPageTypeLarge && is_aligned(size(), ZGranuleSize)), "Page type/size mismatch"); } void ZPage::reset() { _seqnum = ZGlobalSeqNum; _top = start(); _livemap.reset(); _last_used = 0; } ZPage* ZPage::retype(uint8_t type) { assert(_type != type, "Invalid retype"); _type = type; _livemap.resize(object_max_count()); return this; } ZPage* ZPage::split(size_t size) { return split(type_from_size(size), size); } ZPage* ZPage::split(uint8_t type, size_t size) { assert(_virtual.size() > size, "Invalid split"); // Resize this page, keep _numa_id, _seqnum, and _last_used const ZVirtualMemory vmem = _virtual.split(size); const ZPhysicalMemory pmem = _physical.split(size); _type = type_from_size(_virtual.size()); _top = start(); _livemap.resize(object_max_count()); // Create new page, inherit _seqnum and _last_used ZPage* const page = new ZPage(type, vmem, pmem); page->_seqnum = _seqnum; page->_last_used = _last_used; return page; } void ZPage::print_on(outputStream* out) const { out->print_cr(" %-6s " PTR_FORMAT " " PTR_FORMAT " " PTR_FORMAT " %s%s", type_to_string(), start(), top(), end(), is_allocating() ? " Allocating" : "", is_relocatable() ? " Relocatable" : ""); } void ZPage::print() const { print_on(tty); }