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