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/zGlobals.hpp"
26#include "gc/z/zVirtualMemory.inline.hpp"
27#include "logging/log.hpp"
28#include "services/memTracker.hpp"
29
30ZVirtualMemoryManager::ZVirtualMemoryManager() :
31 _manager(),
32 _initialized(false) {
33
34 log_info(gc, init)("Address Space: " PTR_FORMAT " - " PTR_FORMAT " (" SIZE_FORMAT "T)",
35 ZAddressSpaceStart, ZAddressSpaceEnd, ZAddressSpaceSize / K / G);
36
37 // Reserve address space
38 if (!reserve(ZAddressSpaceStart, ZAddressSpaceSize)) {
39 return;
40 }
41
42 // Make the complete address view free
43 _manager.free(0, ZAddressOffsetMax);
44
45 // Register address space with native memory tracker
46 nmt_reserve(ZAddressSpaceStart, ZAddressSpaceSize);
47
48 // Successfully initialized
49 _initialized = true;
50}
51
52void ZVirtualMemoryManager::nmt_reserve(uintptr_t start, size_t size) {
53 MemTracker::record_virtual_memory_reserve((void*)start, size, CALLER_PC);
54 MemTracker::record_virtual_memory_type((void*)start, mtJavaHeap);
55}
56
57bool ZVirtualMemoryManager::is_initialized() const {
58 return _initialized;
59}
60
61ZVirtualMemory ZVirtualMemoryManager::alloc(size_t size, bool alloc_from_front) {
62 uintptr_t start;
63
64 if (alloc_from_front || size <= ZPageSizeSmall) {
65 // Small page
66 start = _manager.alloc_from_front(size);
67 } else {
68 // Medium/Large page
69 start = _manager.alloc_from_back(size);
70 }
71
72 return ZVirtualMemory(start, size);
73}
74
75void ZVirtualMemoryManager::free(const ZVirtualMemory& vmem) {
76 _manager.free(vmem.start(), vmem.size());
77}
78