1 /*
2 * Copyright (c) 1999, 2014, 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/os.hpp"
30
31 // System includes
32
33 #include <unistd.h>
34 #include <sys/socket.h>
35 #include <sys/poll.h>
36 #include <sys/ioctl.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 // File names are case-sensitive on windows only
44 inline int os::file_name_strcmp(const char* s1, const char* s2) {
45 return strcmp(s1, s2);
46 }
47
48 inline bool os::obsolete_option(const JavaVMOption *option) {
49 return false;
50 }
51
52 inline bool os::uses_stack_guard_pages() {
53 return true;
54 }
55
56 inline bool os::allocate_stack_guard_pages() {
57 assert(uses_stack_guard_pages(), "sanity check");
58 return true;
59 }
60
61
62 // On Aix, reservations are made on a page by page basis, nothing to do.
63 inline void os::pd_split_reserved_memory(char *base, size_t size,
64 size_t split, bool realloc) {
65 }
66
67
68 // Bang the shadow pages if they need to be touched to be mapped.
69 inline void os::bang_stack_shadow_pages() {
70 }
71
72 inline void os::dll_unload(void *lib) {
73 ::dlclose(lib);
74 }
75
76 inline const int os::default_file_open_flags() { return 0;}
77
78 inline DIR* os::opendir(const char* dirname)
79 {
80 assert(dirname != NULL, "just checking");
81 return ::opendir(dirname);
82 }
83
84 inline int os::readdir_buf_size(const char *path)
85 {
86 // according to aix sys/limits, NAME_MAX must be retrieved at runtime. */
87 const long my_NAME_MAX = pathconf(path, _PC_NAME_MAX);
88 return my_NAME_MAX + sizeof(dirent) + 1;
89 }
90
91 inline jlong os::lseek(int fd, jlong offset, int whence) {
92 return (jlong) ::lseek64(fd, offset, whence);
93 }
94
95 inline int os::fsync(int fd) {
96 return ::fsync(fd);
97 }
98
99 inline char* os::native_path(char *path) {
100 return path;
101 }
102
103 inline int os::ftruncate(int fd, jlong length) {
104 return ::ftruncate64(fd, length);
105 }
106
107 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf)
108 {
109 dirent* p;
110 int status;
111 assert(dirp != NULL, "just checking");
112
113 // NOTE: Linux readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX
114 // version. Here is the doc for this function:
115 // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html
116
117 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) {
118 errno = status;
119 return NULL;
120 } else
121 return p;
122 }
123
124 inline int os::closedir(DIR *dirp) {
125 assert(dirp != NULL, "argument is NULL");
126 return ::closedir(dirp);
127 }
128
129 // macros for restartable system calls
130
131 #define RESTARTABLE(_cmd, _result) do { \
132 _result = _cmd; \
133 } while(((int)_result == OS_ERR) && (errno == EINTR))
134
135 #define RESTARTABLE_RETURN_INT(_cmd) do { \
136 int _result; \
137 RESTARTABLE(_cmd, _result); \
138 return _result; \
139 } while(false)
140
141 // We don't have NUMA support on Aix, but we need this for compilation.
142 inline bool os::numa_has_static_binding() { ShouldNotReachHere(); return true; }
143 inline bool os::numa_has_group_homing() { ShouldNotReachHere(); return false; }
144
145 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
146 size_t res;
147 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res);
148 return res;
149 }
150
151 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
152 size_t res;
153 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
154 return res;
155 }
156
157 inline int os::close(int fd) {
158 return ::close(fd);
159 }
160
161 inline int os::socket_close(int fd) {
162 return ::close(fd);
163 }
164
165 inline int os::socket(int domain, int type, int protocol) {
166 return ::socket(domain, type, protocol);
167 }
168
169 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
170 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags));
171 }
172
173 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) {
174 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
175 }
176
177 inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
178 return os::send(fd, buf, nBytes, flags);
179 }
180
181 inline int os::timeout(int fd, long timeout) {
182 julong prevtime,newtime;
183 struct timeval t;
184
185 gettimeofday(&t, NULL);
186 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
187
188 for(;;) {
189 struct pollfd pfd;
190
191 pfd.fd = fd;
192 pfd.events = POLLIN | POLLERR;
193
194 int res = ::poll(&pfd, 1, timeout);
195
196 if (res == OS_ERR && errno == EINTR) {
197
198 // On Linux any value < 0 means "forever"
199
200 if(timeout >= 0) {
201 gettimeofday(&t, NULL);
202 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
203 timeout -= newtime - prevtime;
204 if(timeout <= 0)
205 return OS_OK;
206 prevtime = newtime;
207 }
208 } else
209 return res;
210 }
211 }
212
213 inline int os::listen(int fd, int count) {
214 return ::listen(fd, count);
215 }
216
217 inline int os::connect(int fd, struct sockaddr* him, socklen_t len) {
218 RESTARTABLE_RETURN_INT(::connect(fd, him, len));
219 }
220
221 inline int os::accept(int fd, struct sockaddr* him, socklen_t* len) {
222 // Linux doc says this can't return EINTR, unlike accept() on Solaris.
223 // But see attachListener_linux.cpp, LinuxAttachListener::dequeue().
224 return (int)::accept(fd, him, len);
225 }
226
227 inline int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags,
228 sockaddr* from, socklen_t* fromlen) {
229 RESTARTABLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen));
230 }
231
232 inline int os::sendto(int fd, char* buf, size_t len, uint flags,
233 struct sockaddr* to, socklen_t tolen) {
234 RESTARTABLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen));
235 }
236
237 inline int os::socket_shutdown(int fd, int howto) {
238 return ::shutdown(fd, howto);
239 }
240
241 inline int os::bind(int fd, struct sockaddr* him, socklen_t len) {
242 return ::bind(fd, him, len);
243 }
244
245 inline int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len) {
246 return ::getsockname(fd, him, len);
247 }
248
249 inline int os::get_host_name(char* name, int namelen) {
250 return ::gethostname(name, namelen);
251 }
252
253 inline struct hostent* os::get_host_by_name(char* name) {
254 return ::gethostbyname(name);
255 }
256
257 inline int os::get_sock_opt(int fd, int level, int optname,
258 char* optval, socklen_t* optlen) {
259 return ::getsockopt(fd, level, optname, optval, optlen);
260 }
261
262 inline int os::set_sock_opt(int fd, int level, int optname,
263 const char* optval, socklen_t optlen) {
264 return ::setsockopt(fd, level, optname, optval, optlen);
265 }
266
267 inline bool os::supports_monotonic_clock() {
268 // mread_real_time() is monotonic on AIX (see os::javaTimeNanos() comments)
269 return true;
270 }
271
272 inline void os::exit(int num) {
273 ::exit(num);
274 }
275
276 #endif // OS_AIX_VM_OS_AIX_INLINE_HPP