1 /* 2 * Copyright (c) 1999, 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 25 #ifndef OS_LINUX_OS_LINUX_INLINE_HPP 26 #define OS_LINUX_OS_LINUX_INLINE_HPP 27 28 #include "runtime/os.hpp" 29 #include "os_posix.inline.hpp" 30 31 // System includes 32 33 #include <unistd.h> 34 #include <sys/socket.h> 35 #include <poll.h> 36 #include <netdb.h> 37 38 inline bool os::uses_stack_guard_pages() { 39 return true; 40 } 41 42 inline bool os::must_commit_stack_guard_pages() { 43 assert(uses_stack_guard_pages(), "sanity check"); 44 return true; 45 } 46 47 48 // On Linux, reservations are made on a page by page basis, nothing to do. 49 inline void os::pd_split_reserved_memory(char *base, size_t size, 50 size_t split, bool realloc) { 51 } 52 53 54 // Bang the shadow pages if they need to be touched to be mapped. 55 inline void os::map_stack_shadow_pages(address sp) { 56 } 57 58 inline void os::dll_unload(void *lib) { 59 ::dlclose(lib); 60 } 61 62 inline const int os::default_file_open_flags() { return 0;} 63 64 inline jlong os::lseek(int fd, jlong offset, int whence) { 65 return (jlong) ::lseek64(fd, offset, whence); 66 } 67 68 inline int os::fsync(int fd) { 69 return ::fsync(fd); 70 } 71 72 inline int os::ftruncate(int fd, jlong length) { 73 return ::ftruncate64(fd, length); 74 } 75 76 // macros for restartable system calls 77 78 #define RESTARTABLE(_cmd, _result) do { \ 79 _result = _cmd; \ 80 } while(((int)_result == OS_ERR) && (errno == EINTR)) 81 82 #define RESTARTABLE_RETURN_INT(_cmd) do { \ 83 int _result; \ 84 RESTARTABLE(_cmd, _result); \ 85 return _result; \ 86 } while(false) 87 88 inline bool os::numa_has_static_binding() { return true; } 89 inline bool os::numa_has_group_homing() { return false; } 90 91 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) { 92 size_t res; 93 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 94 return res; 95 } 96 97 inline int os::close(int fd) { 98 return ::close(fd); 99 } 100 101 inline int os::socket_close(int fd) { 102 return ::close(fd); 103 } 104 105 inline int os::socket(int domain, int type, int protocol) { 106 return ::socket(domain, type, protocol); 107 } 108 109 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 110 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags)); 111 } 112 113 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) { 114 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags)); 115 } 116 117 inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 118 return os::send(fd, buf, nBytes, flags); 119 } 120 121 inline int os::connect(int fd, struct sockaddr* him, socklen_t len) { 122 RESTARTABLE_RETURN_INT(::connect(fd, him, len)); 123 } 124 125 inline struct hostent* os::get_host_by_name(char* name) { 126 return ::gethostbyname(name); 127 } 128 129 inline bool os::supports_monotonic_clock() { 130 return os::Posix::supports_monotonic_clock(); 131 } 132 133 inline void os::exit(int num) { 134 ::exit(num); 135 } 136 137 #endif // OS_LINUX_OS_LINUX_INLINE_HPP