1/*
2 * Copyright (c) 2015, 2017, 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/zVirtualMemory.hpp"
26#include "logging/log.hpp"
27
28#include <sys/mman.h>
29#include <sys/types.h>
30
31bool ZVirtualMemoryManager::reserve(uintptr_t start, size_t size) {
32 // Reserve address space
33 const uintptr_t actual_start = (uintptr_t)mmap((void*)start, size, PROT_NONE,
34 MAP_ANONYMOUS|MAP_PRIVATE|MAP_NORESERVE, -1, 0);
35 if (actual_start != start) {
36 log_error(gc)("Failed to reserve address space for Java heap");
37 return false;
38 }
39
40 return true;
41}
42