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