1 /* 2 * Copyright (c) 1999, 2015, 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_BSD_VM_OS_BSD_INLINE_HPP 26 #define OS_BSD_VM_OS_BSD_INLINE_HPP 27 28 #include "runtime/os.hpp" 29 30 // System includes 31 32 #include <unistd.h> 33 #include <sys/socket.h> 34 #include <sys/poll.h> 35 #include <netdb.h> 36 37 // File names are case-sensitive on windows only 38 inline int os::file_name_strcmp(const char* s1, const char* s2) { 39 return strcmp(s1, s2); 40 } 41 42 inline bool os::obsolete_option(const JavaVMOption *option) { 43 return false; 44 } 45 46 inline bool os::uses_stack_guard_pages() { 47 return true; 48 } 49 50 inline bool os::allocate_stack_guard_pages() { 51 assert(uses_stack_guard_pages(), "sanity check"); 52 #if !defined(__FreeBSD__) || __FreeBSD__ < 5 53 // Since FreeBSD 4 uses malloc() for allocating the thread stack 54 // there is no need to do anything extra to allocate the guard pages 55 return false; 56 #else 57 // FreeBSD 5+ uses mmap MAP_STACK for allocating the thread stacks. 58 // Must 'allocate' them or guard pages are ignored. 59 return true; 60 #endif 61 } 62 63 64 // On Bsd, reservations are made on a page by page basis, nothing to do. 65 inline void os::pd_split_reserved_memory(char *base, size_t size, 66 size_t split, bool realloc) { 67 } 68 69 70 // Bang the shadow pages if they need to be touched to be mapped. 71 inline void os::bang_stack_shadow_pages() { 72 } 73 74 inline void os::dll_unload(void *lib) { 75 ::dlclose(lib); 76 } 77 78 inline const int os::default_file_open_flags() { return 0;} 79 80 inline DIR* os::opendir(const char* dirname) 81 { 82 assert(dirname != NULL, "just checking"); 83 return ::opendir(dirname); 84 } 85 86 inline int os::readdir_buf_size(const char *path) 87 { 88 return NAME_MAX + sizeof(dirent) + 1; 89 } 90 91 inline jlong os::lseek(int fd, jlong offset, int whence) { 92 return (jlong) ::lseek(fd, offset, whence); 93 } 94 95 inline int os::fsync(int fd) { 96 return ::fsync(fd); 97 } 98 99 inline char* os::native_path(char *path) { 100 return path; 101 } 102 103 inline int os::ftruncate(int fd, jlong length) { 104 return ::ftruncate(fd, length); 105 } 106 107 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf) 108 { 109 dirent* p; 110 int status; 111 assert(dirp != NULL, "just checking"); 112 113 // NOTE: Bsd readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX 114 // version. Here is the doc for this function: 115 // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html 116 117 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) { 118 errno = status; 119 return NULL; 120 } else 121 return p; 122 } 123 124 inline int os::closedir(DIR *dirp) { 125 assert(dirp != NULL, "argument is NULL"); 126 return ::closedir(dirp); 127 } 128 129 // macros for restartable system calls 130 131 #define RESTARTABLE(_cmd, _result) do { \ 132 _result = _cmd; \ 133 } while(((int)_result == OS_ERR) && (errno == EINTR)) 134 135 #define RESTARTABLE_RETURN_INT(_cmd) do { \ 136 int _result; \ 137 RESTARTABLE(_cmd, _result); \ 138 return _result; \ 139 } while(false) 140 141 inline bool os::numa_has_static_binding() { return true; } 142 inline bool os::numa_has_group_homing() { return false; } 143 144 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 145 size_t res; 146 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res); 147 return res; 148 } 149 150 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) { 151 size_t res; 152 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 153 return res; 154 } 155 156 inline int os::close(int fd) { 157 return ::close(fd); 158 } 159 160 inline int os::socket_close(int fd) { 161 return ::close(fd); 162 } 163 164 inline int os::socket(int domain, int type, int protocol) { 165 return ::socket(domain, type, protocol); 166 } 167 168 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 169 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags)); 170 } 171 172 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) { 173 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags)); 174 } 175 176 inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 177 return os::send(fd, buf, nBytes, flags); 178 } 179 180 inline int os::connect(int fd, struct sockaddr* him, socklen_t len) { 181 RESTARTABLE_RETURN_INT(::connect(fd, him, len)); 182 } 183 184 inline struct hostent* os::get_host_by_name(char* name) { 185 return ::gethostbyname(name); 186 } 187 188 inline bool os::supports_monotonic_clock() { 189 #ifdef __APPLE__ 190 return true; 191 #else 192 return Bsd::_clock_gettime != NULL; 193 #endif 194 } 195 196 inline void os::exit(int num) { 197 ::exit(num); 198 } 199 200 #endif // OS_BSD_VM_OS_BSD_INLINE_HPP