1 /*
2 * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2012, 2015 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 // Whether or not calling code should/can commit/uncommit stack pages
57 // before guarding them. Answer for AIX is definitly no, because we
58 // operate on C heap.
59 inline bool os::allocate_stack_guard_pages() {
60 assert(uses_stack_guard_pages(), "sanity check");
61 return false;
62 }
63
64 // On Aix, reservations are made on a page by page basis, nothing to do.
65 inline void os::pd_split_reserved_memory(char *base, size_t size,
66 size_t split, bool realloc) {
67 }
68
69 // Bang the shadow pages if they need to be touched to be mapped.
70 inline void os::bang_stack_shadow_pages() {
71 }
72
73 inline void os::dll_unload(void *lib) {
74 ::dlclose(lib);
75 }
76
77 inline const int os::default_file_open_flags() { return 0;}
78
79 inline DIR* os::opendir(const char* dirname)
80 {
81 assert(dirname != NULL, "just checking");
82 return ::opendir(dirname);
83 }
84
85 inline int os::readdir_buf_size(const char *path)
86 {
87 // according to aix sys/limits, NAME_MAX must be retrieved at runtime. */
88 const long my_NAME_MAX = pathconf(path, _PC_NAME_MAX);
89 return my_NAME_MAX + sizeof(dirent) + 1;
90 }
91
92 inline jlong os::lseek(int fd, jlong offset, int whence) {
93 return (jlong) ::lseek64(fd, offset, whence);
94 }
95
96 inline int os::fsync(int fd) {
97 return ::fsync(fd);
98 }
99
100 inline char* os::native_path(char *path) {
101 return path;
102 }
103
104 inline int os::ftruncate(int fd, jlong length) {
105 return ::ftruncate64(fd, length);
106 }
107
108 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf)
109 {
110 dirent* p;
111 int status;
112 assert(dirp != NULL, "just checking");
113
114 // NOTE: Linux readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX
115 // version. Here is the doc for this function:
116 // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html
117
118 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) {
119 errno = status;
120 return NULL;
121 } else
122 return p;
123 }
124
125 inline int os::closedir(DIR *dirp) {
126 assert(dirp != NULL, "argument is NULL");
127 return ::closedir(dirp);
128 }
129
130 // macros for restartable system calls
131
132 #define RESTARTABLE(_cmd, _result) do { \
133 _result = _cmd; \
134 } while(((int)_result == OS_ERR) && (errno == EINTR))
135
136 #define RESTARTABLE_RETURN_INT(_cmd) do { \
137 int _result; \
138 RESTARTABLE(_cmd, _result); \
139 return _result; \
140 } while(false)
141
142 // We don't have NUMA support on Aix, but we need this for compilation.
143 inline bool os::numa_has_static_binding() { ShouldNotReachHere(); return true; }
144 inline bool os::numa_has_group_homing() { ShouldNotReachHere(); return false; }
145
146 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
147 size_t res;
148 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res);
149 return res;
150 }
151
152 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
153 size_t res;
154 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
155 return res;
156 }
157
158 inline int os::close(int fd) {
159 return ::close(fd);
160 }
161
162 inline int os::socket_close(int fd) {
163 return ::close(fd);
164 }
165
166 inline int os::socket(int domain, int type, int protocol) {
167 return ::socket(domain, type, protocol);
168 }
169
170 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
171 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags));
172 }
173
174 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) {
175 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
176 }
177
178 inline int os::raw_send(int fd, char *buf, size_t nBytes, uint flags) {
179 return os::send(fd, buf, nBytes, flags);
180 }
181
182 inline int os::connect(int fd, struct sockaddr *him, socklen_t len) {
183 RESTARTABLE_RETURN_INT(::connect(fd, him, len));
184 }
185
186 inline struct hostent* os::get_host_by_name(char* name) {
187 return ::gethostbyname(name);
188 }
189
190 inline bool os::supports_monotonic_clock() {
191 // mread_real_time() is monotonic on AIX (see os::javaTimeNanos() comments)
192 return true;
193 }
194
195 inline void os::exit(int num) {
196 ::exit(num);
197 }
198
199 #endif // OS_AIX_VM_OS_AIX_INLINE_HPP