1 /*
2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2012, 2013 SAP AG. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #ifndef OS_AIX_VM_OS_AIX_INLINE_HPP
27 #define OS_AIX_VM_OS_AIX_INLINE_HPP
28
29 #include "runtime/atomic.inline.hpp"
30 #include "runtime/orderAccess.inline.hpp"
31 #include "runtime/os.hpp"
32
33 // System includes
34
35 #include <unistd.h>
36 #include <sys/socket.h>
37 #include <sys/poll.h>
38 #include <sys/ioctl.h>
39 #include <netdb.h>
40
41 // Defined in the system headers included above.
42 #undef rem_size
43
44 inline void* os::thread_local_storage_at(int index) {
45 return pthread_getspecific((pthread_key_t)index);
46 }
47
48 inline const char* os::file_separator() {
49 return "/";
50 }
51
52 inline const char* os::line_separator() {
53 return "\n";
54 }
55
56 inline const char* os::path_separator() {
57 return ":";
58 }
59
60 // File names are case-sensitive on windows only
61 inline int os::file_name_strcmp(const char* s1, const char* s2) {
62 return strcmp(s1, s2);
63 }
64
65 inline bool os::obsolete_option(const JavaVMOption *option) {
66 return false;
67 }
68
69 inline bool os::uses_stack_guard_pages() {
70 return true;
71 }
72
73 inline bool os::allocate_stack_guard_pages() {
74 assert(uses_stack_guard_pages(), "sanity check");
75 return true;
76 }
77
78
79 // On Aix, reservations are made on a page by page basis, nothing to do.
80 inline void os::pd_split_reserved_memory(char *base, size_t size,
81 size_t split, bool realloc) {
82 }
83
84
85 // Bang the shadow pages if they need to be touched to be mapped.
86 inline void os::bang_stack_shadow_pages() {
87 }
88
89 inline void os::dll_unload(void *lib) {
90 ::dlclose(lib);
91 }
92
93 inline const int os::default_file_open_flags() { return 0;}
94
95 inline DIR* os::opendir(const char* dirname)
96 {
97 assert(dirname != NULL, "just checking");
98 return ::opendir(dirname);
99 }
100
101 inline int os::readdir_buf_size(const char *path)
102 {
103 // according to aix sys/limits, NAME_MAX must be retrieved at runtime. */
104 const long my_NAME_MAX = pathconf(path, _PC_NAME_MAX);
105 return my_NAME_MAX + sizeof(dirent) + 1;
106 }
107
108 inline jlong os::lseek(int fd, jlong offset, int whence) {
109 return (jlong) ::lseek64(fd, offset, whence);
110 }
111
112 inline int os::fsync(int fd) {
113 return ::fsync(fd);
114 }
115
116 inline char* os::native_path(char *path) {
117 return path;
118 }
119
120 inline int os::ftruncate(int fd, jlong length) {
121 return ::ftruncate64(fd, length);
122 }
123
124 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf)
125 {
126 dirent* p;
127 int status;
128 assert(dirp != NULL, "just checking");
129
130 // NOTE: Linux readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX
131 // version. Here is the doc for this function:
132 // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html
133
134 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) {
135 errno = status;
136 return NULL;
137 } else
138 return p;
139 }
140
141 inline int os::closedir(DIR *dirp) {
142 assert(dirp != NULL, "argument is NULL");
143 return ::closedir(dirp);
144 }
145
146 // macros for restartable system calls
147
148 #define RESTARTABLE(_cmd, _result) do { \
149 _result = _cmd; \
150 } while(((int)_result == OS_ERR) && (errno == EINTR))
151
152 #define RESTARTABLE_RETURN_INT(_cmd) do { \
153 int _result; \
154 RESTARTABLE(_cmd, _result); \
155 return _result; \
156 } while(false)
157
158 // We don't have NUMA support on Aix, but we need this for compilation.
159 inline bool os::numa_has_static_binding() { ShouldNotReachHere(); return true; }
160 inline bool os::numa_has_group_homing() { ShouldNotReachHere(); 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 Linux 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 // Linux doc says this can't return EINTR, unlike accept() on Solaris.
240 // But see attachListener_linux.cpp, LinuxAttachListener::dequeue().
241 return (int)::accept(fd, him, len);
242 }
243
244 inline int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags,
245 sockaddr* from, socklen_t* fromlen) {
246 RESTARTABLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen));
247 }
248
249 inline int os::sendto(int fd, char* buf, size_t len, uint flags,
250 struct sockaddr* to, socklen_t tolen) {
251 RESTARTABLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen));
252 }
253
254 inline int os::socket_shutdown(int fd, int howto) {
255 return ::shutdown(fd, howto);
256 }
257
258 inline int os::bind(int fd, struct sockaddr* him, socklen_t len) {
259 return ::bind(fd, him, len);
260 }
261
262 inline int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) {
263 return ::getsockname(fd, him, len);
264 }
265
266 inline int os::get_host_name(char* name, int namelen) {
267 return ::gethostname(name, namelen);
268 }
269
270 inline struct hostent* os::get_host_by_name(char* name) {
271 return ::gethostbyname(name);
272 }
273
274 inline int os::get_sock_opt(int fd, int level, int optname,
275 char* optval, socklen_t* optlen) {
276 return ::getsockopt(fd, level, optname, optval, optlen);
277 }
278
279 inline int os::set_sock_opt(int fd, int level, int optname,
280 const char* optval, socklen_t optlen) {
281 return ::setsockopt(fd, level, optname, optval, optlen);
282 }
283
284 inline bool os::supports_monotonic_clock() {
285 // mread_real_time() is monotonic on AIX (see os::javaTimeNanos() comments)
286 return true;
287 }
288
289 #endif // OS_AIX_VM_OS_AIX_INLINE_HPP