1 /* 2 * Copyright (c) 1999, 2014, 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 inline void* os::thread_local_storage_at(int index) { 38 return pthread_getspecific((pthread_key_t)index); 39 } 40 41 // File names are case-sensitive on windows only 42 inline int os::file_name_strcmp(const char* s1, const char* s2) { 43 return strcmp(s1, s2); 44 } 45 46 inline bool os::obsolete_option(const JavaVMOption *option) { 47 return false; 48 } 49 50 inline bool os::uses_stack_guard_pages() { 51 return true; 52 } 53 54 inline bool os::allocate_stack_guard_pages() { 55 assert(uses_stack_guard_pages(), "sanity check"); 56 #if !defined(__FreeBSD__) || __FreeBSD__ < 5 57 // Since FreeBSD 4 uses malloc() for allocating the thread stack 58 // there is no need to do anything extra to allocate the guard pages 59 return false; 60 #else 61 // FreeBSD 5+ uses mmap MAP_STACK for allocating the thread stacks. 62 // Must 'allocate' them or guard pages are ignored. 63 return true; 64 #endif 65 } 66 67 68 // On Bsd, reservations are made on a page by page basis, nothing to do. 69 inline void os::pd_split_reserved_memory(char *base, size_t size, 70 size_t split, bool realloc) { 71 } 72 73 74 // Bang the shadow pages if they need to be touched to be mapped. 75 inline void os::bang_stack_shadow_pages() { 76 } 77 78 inline void os::dll_unload(void *lib) { 79 ::dlclose(lib); 80 } 81 82 inline const int os::default_file_open_flags() { return 0;} 83 84 inline DIR* os::opendir(const char* dirname) 85 { 86 assert(dirname != NULL, "just checking"); 87 return ::opendir(dirname); 88 } 89 90 inline int os::readdir_buf_size(const char *path) 91 { 92 return NAME_MAX + sizeof(dirent) + 1; 93 } 94 95 inline jlong os::lseek(int fd, jlong offset, int whence) { 96 return (jlong) ::lseek(fd, offset, whence); 97 } 98 99 inline int os::fsync(int fd) { 100 return ::fsync(fd); 101 } 102 103 inline char* os::native_path(char *path) { 104 return path; 105 } 106 107 inline int os::ftruncate(int fd, jlong length) { 108 return ::ftruncate(fd, length); 109 } 110 111 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf) 112 { 113 dirent* p; 114 int status; 115 assert(dirp != NULL, "just checking"); 116 117 // NOTE: Bsd readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX 118 // version. Here is the doc for this function: 119 // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html 120 121 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) { 122 errno = status; 123 return NULL; 124 } else 125 return p; 126 } 127 128 inline int os::closedir(DIR *dirp) { 129 assert(dirp != NULL, "argument is NULL"); 130 return ::closedir(dirp); 131 } 132 133 // macros for restartable system calls 134 135 #define RESTARTABLE(_cmd, _result) do { \ 136 _result = _cmd; \ 137 } while(((int)_result == OS_ERR) && (errno == EINTR)) 138 139 #define RESTARTABLE_RETURN_INT(_cmd) do { \ 140 int _result; \ 141 RESTARTABLE(_cmd, _result); \ 142 return _result; \ 143 } while(false) 144 145 inline bool os::numa_has_static_binding() { return true; } 146 inline bool os::numa_has_group_homing() { return false; } 147 148 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 149 size_t res; 150 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res); 151 return res; 152 } 153 154 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) { 155 size_t res; 156 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 157 return res; 158 } 159 160 inline int os::close(int fd) { 161 return ::close(fd); 162 } 163 164 inline int os::socket_close(int fd) { 165 return ::close(fd); 166 } 167 168 inline int os::socket(int domain, int type, int protocol) { 169 return ::socket(domain, type, protocol); 170 } 171 172 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 173 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags)); 174 } 175 176 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) { 177 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags)); 178 } 179 180 inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 181 return os::send(fd, buf, nBytes, flags); 182 } 183 184 inline int os::timeout(int fd, long timeout) { 185 julong prevtime,newtime; 186 struct timeval t; 187 188 gettimeofday(&t, NULL); 189 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 190 191 for(;;) { 192 struct pollfd pfd; 193 194 pfd.fd = fd; 195 pfd.events = POLLIN | POLLERR; 196 197 int res = ::poll(&pfd, 1, timeout); 198 199 if (res == OS_ERR && errno == EINTR) { 200 201 // On Bsd any value < 0 means "forever" 202 203 if(timeout >= 0) { 204 gettimeofday(&t, NULL); 205 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 206 timeout -= newtime - prevtime; 207 if(timeout <= 0) 208 return OS_OK; 209 prevtime = newtime; 210 } 211 } else 212 return res; 213 } 214 } 215 216 inline int os::listen(int fd, int count) { 217 return ::listen(fd, count); 218 } 219 220 inline int os::connect(int fd, struct sockaddr* him, socklen_t len) { 221 RESTARTABLE_RETURN_INT(::connect(fd, him, len)); 222 } 223 224 inline int os::accept(int fd, struct sockaddr* him, socklen_t* len) { 225 // At least OpenBSD and FreeBSD can return EINTR from accept. 226 RESTARTABLE_RETURN_INT(::accept(fd, him, len)); 227 } 228 229 inline int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags, 230 sockaddr* from, socklen_t* fromlen) { 231 RESTARTABLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen)); 232 } 233 234 inline int os::sendto(int fd, char* buf, size_t len, uint flags, 235 struct sockaddr *to, socklen_t tolen) { 236 RESTARTABLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen)); 237 } 238 239 inline int os::socket_shutdown(int fd, int howto) { 240 return ::shutdown(fd, howto); 241 } 242 243 inline int os::bind(int fd, struct sockaddr* him, socklen_t len) { 244 return ::bind(fd, him, len); 245 } 246 247 inline int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) { 248 return ::getsockname(fd, him, len); 249 } 250 251 inline int os::get_host_name(char* name, int namelen) { 252 return ::gethostname(name, namelen); 253 } 254 255 inline struct hostent* os::get_host_by_name(char* name) { 256 return ::gethostbyname(name); 257 } 258 259 inline int os::get_sock_opt(int fd, int level, int optname, 260 char *optval, socklen_t* optlen) { 261 return ::getsockopt(fd, level, optname, optval, optlen); 262 } 263 264 inline int os::set_sock_opt(int fd, int level, int optname, 265 const char* optval, socklen_t optlen) { 266 return ::setsockopt(fd, level, optname, optval, optlen); 267 } 268 269 inline bool os::supports_monotonic_clock() { 270 #ifdef __APPLE__ 271 return true; 272 #else 273 return Bsd::_clock_gettime != NULL; 274 #endif 275 } 276 277 #endif // OS_BSD_VM_OS_BSD_INLINE_HPP