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 #ifndef OS_LINUX_GC_Z_ZPHYSICALMEMORYBACKING_LINUX_HPP 25 #define OS_LINUX_GC_Z_ZPHYSICALMEMORYBACKING_LINUX_HPP 26 27 #include "gc/z/zBackingFile_linux.hpp" 28 #include "gc/z/zMemory.hpp" 29 30 class ZErrno; 31 class ZPhysicalMemory; 32 33 class ZPhysicalMemoryBacking { 34 private: 35 ZBackingFile _file; 36 ZMemoryManager _committed; 37 ZMemoryManager _uncommitted; 38 39 void warn_available_space(size_t max) const; 40 void warn_max_map_count(size_t max) const; 41 42 void map_failed(ZErrno err) const; 43 44 void advise_view(uintptr_t addr, size_t size, int advice) const; 45 void pretouch_view(uintptr_t addr, size_t size) const; 46 void map_view(const ZPhysicalMemory& pmem, uintptr_t addr) const; 47 void unmap_view(const ZPhysicalMemory& pmem, uintptr_t addr) const; 48 49 public: 50 bool is_initialized() const; 51 52 void warn_commit_limits(size_t max) const; 53 bool supports_uncommit(); 54 55 size_t commit(size_t size); 56 size_t uncommit(size_t size); 57 58 ZPhysicalMemory alloc(size_t size); 59 void free(const ZPhysicalMemory& pmem); 60 61 uintptr_t nmt_address(uintptr_t offset) const; 62 63 void pretouch(uintptr_t offset, size_t size) const; 64 65 void map(const ZPhysicalMemory& pmem, uintptr_t offset) const; 66 void unmap(const ZPhysicalMemory& pmem, uintptr_t offset) const; 67 68 void debug_map(const ZPhysicalMemory& pmem, uintptr_t offset) const; 69 void debug_unmap(const ZPhysicalMemory& pmem, uintptr_t offset) const; 70 }; 71 72 #endif // OS_LINUX_GC_Z_ZPHYSICALMEMORYBACKING_LINUX_HPP