1 /*
2 * Copyright (c) 1999, 2015, 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/os.hpp"
29
30 // System includes
31
32 #include <unistd.h>
33 #include <sys/socket.h>
34 #include <sys/poll.h>
35 #include <netdb.h>
36
37 // File names are case-sensitive on windows only
38 inline int os::file_name_strcmp(const char* s1, const char* s2) {
39 return strcmp(s1, s2);
40 }
41
42 inline bool os::obsolete_option(const JavaVMOption *option) {
43 return false;
44 }
45
46 inline bool os::uses_stack_guard_pages() {
47 return true;
48 }
49
50 inline bool os::allocate_stack_guard_pages() {
51 assert(uses_stack_guard_pages(), "sanity check");
52 #if !defined(__FreeBSD__) || __FreeBSD__ < 5
53 // Since FreeBSD 4 uses malloc() for allocating the thread stack
54 // there is no need to do anything extra to allocate the guard pages
55 return false;
56 #else
57 // FreeBSD 5+ uses mmap MAP_STACK for allocating the thread stacks.
58 // Must 'allocate' them or guard pages are ignored.
59 return true;
60 #endif
61 }
62
63
64 // On Bsd, 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
70 // Bang the shadow pages if they need to be touched to be mapped.
71 inline void os::map_stack_shadow_pages() {
72 }
73
74 inline void os::dll_unload(void *lib) {
75 ::dlclose(lib);
76 }
77
78 inline const int os::default_file_open_flags() { return 0;}
79
80 inline DIR* os::opendir(const char* dirname)
81 {
82 assert(dirname != NULL, "just checking");
83 return ::opendir(dirname);
84 }
85
86 inline int os::readdir_buf_size(const char *path)
87 {
88 return NAME_MAX + sizeof(dirent) + 1;
89 }
90
91 inline jlong os::lseek(int fd, jlong offset, int whence) {
92 return (jlong) ::lseek(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 ::ftruncate(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: Bsd 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 inline bool os::numa_has_static_binding() { return true; }
142 inline bool os::numa_has_group_homing() { return false; }
143
144 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
145 size_t res;
146 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res);
147 return res;
148 }
149
150 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
151 size_t res;
152 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
153 return res;
154 }
155
156 inline int os::close(int fd) {
157 return ::close(fd);
158 }
159
160 inline int os::socket_close(int fd) {
161 return ::close(fd);
162 }
163
164 inline int os::socket(int domain, int type, int protocol) {
165 return ::socket(domain, type, protocol);
166 }
167
168 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
169 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags));
170 }
171
172 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) {
173 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
174 }
175
176 inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
177 return os::send(fd, buf, nBytes, flags);
178 }
179
180 inline int os::connect(int fd, struct sockaddr* him, socklen_t len) {
181 RESTARTABLE_RETURN_INT(::connect(fd, him, len));
182 }
183
184 inline struct hostent* os::get_host_by_name(char* name) {
185 return ::gethostbyname(name);
186 }
187
188 inline bool os::supports_monotonic_clock() {
189 #ifdef __APPLE__
190 return true;
191 #else
192 return Bsd::_clock_gettime != NULL;
193 #endif
194 }
195
196 inline void os::exit(int num) {
197 ::exit(num);
198 }
199
200 #endif // OS_BSD_VM_OS_BSD_INLINE_HPP