1/*
2 * Copyright (c) 2015, 2019, 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#include "precompiled.hpp"
25#include "gc/z/zPage.inline.hpp"
26#include "gc/z/zPhysicalMemory.inline.hpp"
27#include "gc/z/zVirtualMemory.inline.hpp"
28#include "utilities/align.hpp"
29#include "utilities/debug.hpp"
30
31ZPage::ZPage(const ZVirtualMemory& vmem, const ZPhysicalMemory& pmem) :
32 _type(type_from_size(vmem.size())),
33 _numa_id((uint8_t)-1),
34 _seqnum(0),
35 _virtual(vmem),
36 _top(start()),
37 _livemap(object_max_count()),
38 _last_used(0),
39 _physical(pmem) {
40 assert_initialized();
41}
42
43ZPage::ZPage(uint8_t type, const ZVirtualMemory& vmem, const ZPhysicalMemory& pmem) :
44 _type(type),
45 _numa_id((uint8_t)-1),
46 _seqnum(0),
47 _virtual(vmem),
48 _top(start()),
49 _livemap(object_max_count()),
50 _last_used(0),
51 _physical(pmem) {
52 assert_initialized();
53}
54
55void ZPage::assert_initialized() const {
56 assert(!_virtual.is_null(), "Should not be null");
57 assert(!_physical.is_null(), "Should not be null");
58 assert((_type == ZPageTypeSmall && size() == ZPageSizeSmall) ||
59 (_type == ZPageTypeMedium && size() == ZPageSizeMedium) ||
60 (_type == ZPageTypeLarge && is_aligned(size(), ZGranuleSize)),
61 "Page type/size mismatch");
62}
63
64void ZPage::reset() {
65 _seqnum = ZGlobalSeqNum;
66 _top = start();
67 _livemap.reset();
68 _last_used = 0;
69}
70
71ZPage* ZPage::retype(uint8_t type) {
72 assert(_type != type, "Invalid retype");
73 _type = type;
74 _livemap.resize(object_max_count());
75 return this;
76}
77
78ZPage* ZPage::split(size_t size) {
79 return split(type_from_size(size), size);
80}
81
82ZPage* ZPage::split(uint8_t type, size_t size) {
83 assert(_virtual.size() > size, "Invalid split");
84
85 // Resize this page, keep _numa_id, _seqnum, and _last_used
86 const ZVirtualMemory vmem = _virtual.split(size);
87 const ZPhysicalMemory pmem = _physical.split(size);
88 _type = type_from_size(_virtual.size());
89 _top = start();
90 _livemap.resize(object_max_count());
91
92 // Create new page, inherit _seqnum and _last_used
93 ZPage* const page = new ZPage(type, vmem, pmem);
94 page->_seqnum = _seqnum;
95 page->_last_used = _last_used;
96 return page;
97}
98
99void ZPage::print_on(outputStream* out) const {
100 out->print_cr(" %-6s " PTR_FORMAT " " PTR_FORMAT " " PTR_FORMAT " %s%s",
101 type_to_string(), start(), top(), end(),
102 is_allocating() ? " Allocating" : "",
103 is_relocatable() ? " Relocatable" : "");
104}
105
106void ZPage::print() const {
107 print_on(tty);
108}
109