1 /* 2 * Copyright (c) 1999, 2013, 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_VM_OS_LINUX_INLINE_HPP 26 #define OS_LINUX_VM_OS_LINUX_INLINE_HPP 27 28 #include "runtime/atomic.inline.hpp" 29 #include "runtime/os.hpp" 30 31 #ifdef TARGET_OS_ARCH_linux_x86 32 # include "orderAccess_linux_x86.inline.hpp" 33 #endif 34 #ifdef TARGET_OS_ARCH_linux_sparc 35 # include "orderAccess_linux_sparc.inline.hpp" 36 #endif 37 #ifdef TARGET_OS_ARCH_linux_zero 38 # include "orderAccess_linux_zero.inline.hpp" 39 #endif 40 #ifdef TARGET_OS_ARCH_linux_arm 41 # include "orderAccess_linux_arm.inline.hpp" 42 #endif 43 #ifdef TARGET_OS_ARCH_linux_ppc 44 # include "orderAccess_linux_ppc.inline.hpp" 45 #endif 46 47 // System includes 48 49 #include <unistd.h> 50 #include <sys/socket.h> 51 #include <sys/poll.h> 52 #include <netdb.h> 53 54 inline void* os::thread_local_storage_at(int index) { 55 return pthread_getspecific((pthread_key_t)index); 56 } 57 58 inline const char* os::file_separator() { 59 return "/"; 60 } 61 62 inline const char* os::line_separator() { 63 return "\n"; 64 } 65 66 inline const char* os::path_separator() { 67 return ":"; 68 } 69 70 // File names are case-sensitive on windows only 71 inline int os::file_name_strcmp(const char* s1, const char* s2) { 72 return strcmp(s1, s2); 73 } 74 75 inline bool os::obsolete_option(const JavaVMOption *option) { 76 return false; 77 } 78 79 inline bool os::uses_stack_guard_pages() { 80 return true; 81 } 82 83 inline bool os::allocate_stack_guard_pages() { 84 assert(uses_stack_guard_pages(), "sanity check"); 85 return true; 86 } 87 88 89 // On Linux, reservations are made on a page by page basis, nothing to do. 90 inline void os::pd_split_reserved_memory(char *base, size_t size, 91 size_t split, bool realloc) { 92 } 93 94 95 // Bang the shadow pages if they need to be touched to be mapped. 96 inline void os::bang_stack_shadow_pages() { 97 } 98 99 inline void os::dll_unload(void *lib) { 100 ::dlclose(lib); 101 } 102 103 inline const int os::default_file_open_flags() { return 0;} 104 105 inline DIR* os::opendir(const char* dirname) 106 { 107 assert(dirname != NULL, "just checking"); 108 return ::opendir(dirname); 109 } 110 111 inline int os::readdir_buf_size(const char *path) 112 { 113 return NAME_MAX + sizeof(dirent) + 1; 114 } 115 116 inline jlong os::lseek(int fd, jlong offset, int whence) { 117 return (jlong) ::lseek64(fd, offset, whence); 118 } 119 120 inline int os::fsync(int fd) { 121 return ::fsync(fd); 122 } 123 124 inline char* os::native_path(char *path) { 125 return path; 126 } 127 128 inline int os::ftruncate(int fd, jlong length) { 129 return ::ftruncate64(fd, length); 130 } 131 132 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf) 133 { 134 dirent* p; 135 int status; 136 assert(dirp != NULL, "just checking"); 137 138 // NOTE: Linux readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX 139 // version. Here is the doc for this function: 140 // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html 141 142 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) { 143 errno = status; 144 return NULL; 145 } else 146 return p; 147 } 148 149 inline int os::closedir(DIR *dirp) { 150 assert(dirp != NULL, "argument is NULL"); 151 return ::closedir(dirp); 152 } 153 154 // macros for restartable system calls 155 156 #define RESTARTABLE(_cmd, _result) do { \ 157 _result = _cmd; \ 158 } while(((int)_result == OS_ERR) && (errno == EINTR)) 159 160 #define RESTARTABLE_RETURN_INT(_cmd) do { \ 161 int _result; \ 162 RESTARTABLE(_cmd, _result); \ 163 return _result; \ 164 } while(false) 165 166 inline bool os::numa_has_static_binding() { return true; } 167 inline bool os::numa_has_group_homing() { return false; } 168 169 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 170 size_t res; 171 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res); 172 return res; 173 } 174 175 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) { 176 size_t res; 177 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 178 return res; 179 } 180 181 inline int os::close(int fd) { 182 return ::close(fd); 183 } 184 185 inline int os::socket_close(int fd) { 186 return ::close(fd); 187 } 188 189 inline int os::socket(int domain, int type, int protocol) { 190 return ::socket(domain, type, protocol); 191 } 192 193 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 194 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags)); 195 } 196 197 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) { 198 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags)); 199 } 200 201 inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 202 return os::send(fd, buf, nBytes, flags); 203 } 204 205 inline int os::timeout(int fd, long timeout) { 206 julong prevtime,newtime; 207 struct timeval t; 208 209 gettimeofday(&t, NULL); 210 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 211 212 for(;;) { 213 struct pollfd pfd; 214 215 pfd.fd = fd; 216 pfd.events = POLLIN | POLLERR; 217 218 int res = ::poll(&pfd, 1, timeout); 219 220 if (res == OS_ERR && errno == EINTR) { 221 222 // On Linux any value < 0 means "forever" 223 224 if(timeout >= 0) { 225 gettimeofday(&t, NULL); 226 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 227 timeout -= newtime - prevtime; 228 if(timeout <= 0) 229 return OS_OK; 230 prevtime = newtime; 231 } 232 } else 233 return res; 234 } 235 } 236 237 inline int os::listen(int fd, int count) { 238 return ::listen(fd, count); 239 } 240 241 inline int os::connect(int fd, struct sockaddr* him, socklen_t len) { 242 RESTARTABLE_RETURN_INT(::connect(fd, him, len)); 243 } 244 245 inline int os::accept(int fd, struct sockaddr* him, socklen_t* len) { 246 // Linux doc says this can't return EINTR, unlike accept() on Solaris. 247 // But see attachListener_linux.cpp, LinuxAttachListener::dequeue(). 248 return (int)::accept(fd, him, len); 249 } 250 251 inline int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags, 252 sockaddr* from, socklen_t* fromlen) { 253 RESTARTABLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen)); 254 } 255 256 inline int os::sendto(int fd, char* buf, size_t len, uint flags, 257 struct sockaddr* to, socklen_t tolen) { 258 RESTARTABLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen)); 259 } 260 261 inline int os::socket_shutdown(int fd, int howto) { 262 return ::shutdown(fd, howto); 263 } 264 265 inline int os::bind(int fd, struct sockaddr* him, socklen_t len) { 266 return ::bind(fd, him, len); 267 } 268 269 inline int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) { 270 return ::getsockname(fd, him, len); 271 } 272 273 inline int os::get_host_name(char* name, int namelen) { 274 return ::gethostname(name, namelen); 275 } 276 277 inline struct hostent* os::get_host_by_name(char* name) { 278 return ::gethostbyname(name); 279 } 280 281 inline int os::get_sock_opt(int fd, int level, int optname, 282 char* optval, socklen_t* optlen) { 283 return ::getsockopt(fd, level, optname, optval, optlen); 284 } 285 286 inline int os::set_sock_opt(int fd, int level, int optname, 287 const char* optval, socklen_t optlen) { 288 return ::setsockopt(fd, level, optname, optval, optlen); 289 } 290 291 #endif // OS_LINUX_VM_OS_LINUX_INLINE_HPP