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 31 bool 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 }