os_bsd.inline.hpp revision 4240:63e54c37ac64
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_BSD_VM_OS_BSD_INLINE_HPP 26#define OS_BSD_VM_OS_BSD_INLINE_HPP 27 28#include "runtime/atomic.inline.hpp" 29#include "runtime/os.hpp" 30 31#ifdef TARGET_OS_ARCH_bsd_x86 32# include "orderAccess_bsd_x86.inline.hpp" 33#endif 34#ifdef TARGET_OS_ARCH_bsd_zero 35# include "orderAccess_bsd_zero.inline.hpp" 36#endif 37 38// System includes 39 40#include <unistd.h> 41#include <sys/socket.h> 42#include <sys/poll.h> 43#include <netdb.h> 44 45inline void* os::thread_local_storage_at(int index) { 46 return pthread_getspecific((pthread_key_t)index); 47} 48 49inline const char* os::file_separator() { 50 return "/"; 51} 52 53inline const char* os::line_separator() { 54 return "\n"; 55} 56 57inline const char* os::path_separator() { 58 return ":"; 59} 60 61// File names are case-sensitive on windows only 62inline int os::file_name_strcmp(const char* s1, const char* s2) { 63 return strcmp(s1, s2); 64} 65 66inline bool os::obsolete_option(const JavaVMOption *option) { 67 return false; 68} 69 70inline bool os::uses_stack_guard_pages() { 71 return true; 72} 73 74inline bool os::allocate_stack_guard_pages() { 75 assert(uses_stack_guard_pages(), "sanity check"); 76#if !defined(__FreeBSD__) || __FreeBSD__ < 5 77 // Since FreeBSD 4 uses malloc() for allocating the thread stack 78 // there is no need to do anything extra to allocate the guard pages 79 return false; 80#else 81 // FreeBSD 5+ uses mmap MAP_STACK for allocating the thread stacks. 82 // Must 'allocate' them or guard pages are ignored. 83 return true; 84#endif 85} 86 87 88// On Bsd, reservations are made on a page by page basis, nothing to do. 89inline void os::pd_split_reserved_memory(char *base, size_t size, 90 size_t split, bool realloc) { 91} 92 93 94// Bang the shadow pages if they need to be touched to be mapped. 95inline void os::bang_stack_shadow_pages() { 96} 97 98inline void os::dll_unload(void *lib) { 99 ::dlclose(lib); 100} 101 102inline const int os::default_file_open_flags() { return 0;} 103 104inline DIR* os::opendir(const char* dirname) 105{ 106 assert(dirname != NULL, "just checking"); 107 return ::opendir(dirname); 108} 109 110inline int os::readdir_buf_size(const char *path) 111{ 112 return NAME_MAX + sizeof(dirent) + 1; 113} 114 115inline jlong os::lseek(int fd, jlong offset, int whence) { 116 return (jlong) ::lseek(fd, offset, whence); 117} 118 119inline int os::fsync(int fd) { 120 return ::fsync(fd); 121} 122 123inline char* os::native_path(char *path) { 124 return path; 125} 126 127inline int os::ftruncate(int fd, jlong length) { 128 return ::ftruncate(fd, length); 129} 130 131inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf) 132{ 133 dirent* p; 134 int status; 135 assert(dirp != NULL, "just checking"); 136 137 // NOTE: Bsd readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX 138 // version. Here is the doc for this function: 139 // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html 140 141 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) { 142 errno = status; 143 return NULL; 144 } else 145 return p; 146} 147 148inline int os::closedir(DIR *dirp) { 149 assert(dirp != NULL, "argument is NULL"); 150 return ::closedir(dirp); 151} 152 153// macros for restartable system calls 154 155#define RESTARTABLE(_cmd, _result) do { \ 156 _result = _cmd; \ 157 } while(((int)_result == OS_ERR) && (errno == EINTR)) 158 159#define RESTARTABLE_RETURN_INT(_cmd) do { \ 160 int _result; \ 161 RESTARTABLE(_cmd, _result); \ 162 return _result; \ 163} while(false) 164 165inline bool os::numa_has_static_binding() { return true; } 166inline bool os::numa_has_group_homing() { return false; } 167 168inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 169 size_t res; 170 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res); 171 return res; 172} 173 174inline size_t os::write(int fd, const void *buf, unsigned int nBytes) { 175 size_t res; 176 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 177 return res; 178} 179 180inline int os::close(int fd) { 181 RESTARTABLE_RETURN_INT(::close(fd)); 182} 183 184inline int os::socket_close(int fd) { 185 RESTARTABLE_RETURN_INT(::close(fd)); 186} 187 188inline int os::socket(int domain, int type, int protocol) { 189 return ::socket(domain, type, protocol); 190} 191 192inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 193 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags)); 194} 195 196inline int os::send(int fd, char* buf, size_t nBytes, uint flags) { 197 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags)); 198} 199 200inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 201 return os::send(fd, buf, nBytes, flags); 202} 203 204inline int os::timeout(int fd, long timeout) { 205 julong prevtime,newtime; 206 struct timeval t; 207 208 gettimeofday(&t, NULL); 209 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 210 211 for(;;) { 212 struct pollfd pfd; 213 214 pfd.fd = fd; 215 pfd.events = POLLIN | POLLERR; 216 217 int res = ::poll(&pfd, 1, timeout); 218 219 if (res == OS_ERR && errno == EINTR) { 220 221 // On Bsd any value < 0 means "forever" 222 223 if(timeout >= 0) { 224 gettimeofday(&t, NULL); 225 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 226 timeout -= newtime - prevtime; 227 if(timeout <= 0) 228 return OS_OK; 229 prevtime = newtime; 230 } 231 } else 232 return res; 233 } 234} 235 236inline int os::listen(int fd, int count) { 237 return ::listen(fd, count); 238} 239 240inline int os::connect(int fd, struct sockaddr* him, socklen_t len) { 241 RESTARTABLE_RETURN_INT(::connect(fd, him, len)); 242} 243 244inline int os::accept(int fd, struct sockaddr* him, socklen_t* len) { 245 // At least OpenBSD and FreeBSD can return EINTR from accept. 246 RESTARTABLE_RETURN_INT(::accept(fd, him, len)); 247} 248 249inline int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags, 250 sockaddr* from, socklen_t* fromlen) { 251 RESTARTABLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen)); 252} 253 254inline int os::sendto(int fd, char* buf, size_t len, uint flags, 255 struct sockaddr *to, socklen_t tolen) { 256 RESTARTABLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen)); 257} 258 259inline int os::socket_shutdown(int fd, int howto) { 260 return ::shutdown(fd, howto); 261} 262 263inline int os::bind(int fd, struct sockaddr* him, socklen_t len) { 264 return ::bind(fd, him, len); 265} 266 267inline int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) { 268 return ::getsockname(fd, him, len); 269} 270 271inline int os::get_host_name(char* name, int namelen) { 272 return ::gethostname(name, namelen); 273} 274 275inline struct hostent* os::get_host_by_name(char* name) { 276 return ::gethostbyname(name); 277} 278 279inline int os::get_sock_opt(int fd, int level, int optname, 280 char *optval, socklen_t* optlen) { 281 return ::getsockopt(fd, level, optname, optval, optlen); 282} 283 284inline int os::set_sock_opt(int fd, int level, int optname, 285 const char* optval, socklen_t optlen) { 286 return ::setsockopt(fd, level, optname, optval, optlen); 287} 288 289inline void os::Bsd::SuspendResume::set_suspended() { 290 jint temp, temp2; 291 do { 292 temp = _state; 293 temp2 = Atomic::cmpxchg(temp | SR_SUSPENDED, &_state, temp); 294 } while (temp2 != temp); 295} 296 297inline void os::Bsd::SuspendResume::clear_suspended() { 298 jint temp, temp2; 299 do { 300 temp = _state; 301 temp2 = Atomic::cmpxchg(temp & ~SR_SUSPENDED, &_state, temp); 302 } while (temp2 != temp); 303} 304 305#endif // OS_BSD_VM_OS_BSD_INLINE_HPP 306