1 /*
2 * Copyright (c) 1999, 2018, 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 <poll.h>
35 #include <netdb.h>
36
37 #ifdef __APPLE__
38
39 #include <unistd.h>
40 #include <strings.h>
41 #include <xlocale.h>
42
43 // File names could be case-insensitive on Mac OS X,
44 // depending on the filesystem's capabilities
45 static bool is_filesystem_case_insensitive(const char* path) {
46 if (path[0] != '/') {
47 // The path is relative, so use the current working directory
48 char cwd[PATH_MAX];
49 os::get_current_directory(cwd, PATH_MAX);
50 return (pathconf(cwd, _PC_CASE_SENSITIVE) != 1);
51 } else {
52 // The path is absolute, so use it
53 return (pathconf(path, _PC_CASE_SENSITIVE) != 1);
54 }
55 }
56
57 inline int os::file_name_strncmp(const char* s1, const char* s2, size_t num) {
58 int result = strncmp(s1, s2, num);
59 if ((result != 0) && (strlen(s1) == strlen(s2))) {
60 if (is_filesystem_case_insensitive(s1)) {
61 result = strncasecmp(s1, s2, num);
62 }
63 }
64 return result;
65 }
66
67 #else
68
69 inline int os::file_name_strncmp(const char* s1, const char* s2, size_t num) {
70 return strncmp(s1, s2, num);
71 }
72
73 #endif // __APPLE__
74
75 inline bool os::obsolete_option(const JavaVMOption *option) {
76 return false;
77 }
78
79 inline bool os::uses_stack_guard_pages() {
80 return true;
81 }
82
83 inline bool os::must_commit_stack_guard_pages() {
84 assert(uses_stack_guard_pages(), "sanity check");
85 #if !defined(__FreeBSD__) || __FreeBSD__ < 5
86 // Since FreeBSD 4 uses malloc() for allocating the thread stack
87 // there is no need to do anything extra to allocate the guard pages
88 return false;
89 #else
90 // FreeBSD 5+ uses mmap MAP_STACK for allocating the thread stacks.
91 // Must 'allocate' them or guard pages are ignored.
92 return true;
93 #endif
94 }
95
96
97 // On Bsd, reservations are made on a page by page basis, nothing to do.
98 inline void os::pd_split_reserved_memory(char *base, size_t size,
99 size_t split, bool realloc) {
100 }
101
102
103 // Bang the shadow pages if they need to be touched to be mapped.
104 inline void os::map_stack_shadow_pages(address sp) {
105 }
106
107 inline void os::dll_unload(void *lib) {
108 ::dlclose(lib);
109 }
110
111 inline const int os::default_file_open_flags() { return 0;}
112
113 inline jlong os::lseek(int fd, jlong offset, int whence) {
114 return (jlong) ::lseek(fd, offset, whence);
115 }
116
117 inline int os::fsync(int fd) {
118 return ::fsync(fd);
119 }
120
121 inline int os::ftruncate(int fd, jlong length) {
122 return ::ftruncate(fd, length);
123 }
124
125 // macros for restartable system calls
126
127 #define RESTARTABLE(_cmd, _result) do { \
128 _result = _cmd; \
129 } while(((int)_result == OS_ERR) && (errno == EINTR))
130
131 #define RESTARTABLE_RETURN_INT(_cmd) do { \
132 int _result; \
133 RESTARTABLE(_cmd, _result); \
134 return _result; \
135 } while(false)
136
137 inline bool os::numa_has_static_binding() { return true; }
138 inline bool os::numa_has_group_homing() { return false; }
139
140 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
141 size_t res;
142 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res);
143 return res;
144 }
145
146 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
147 size_t res;
148 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
149 return res;
150 }
151
152 inline int os::close(int fd) {
153 return ::close(fd);
154 }
155
156 inline int os::socket_close(int fd) {
157 return ::close(fd);
158 }
159
160 inline int os::socket(int domain, int type, int protocol) {
161 return ::socket(domain, type, protocol);
162 }
163
164 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
165 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags));
166 }
167
168 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) {
169 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
170 }
171
172 inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
173 return os::send(fd, buf, nBytes, flags);
174 }
175
176 inline int os::connect(int fd, struct sockaddr* him, socklen_t len) {
177 RESTARTABLE_RETURN_INT(::connect(fd, him, len));
178 }
179
180 inline struct hostent* os::get_host_by_name(char* name) {
181 return ::gethostbyname(name);
182 }
183
184 inline bool os::supports_monotonic_clock() {
185 #ifdef __APPLE__
186 return true;
187 #else
188 return Bsd::_clock_gettime != NULL;
189 #endif
190 }
191
192 inline void os::exit(int num) {
193 ::exit(num);
194 }
195
196 #endif // OS_BSD_VM_OS_BSD_INLINE_HPP