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 // File names are case-insensitive on windows only
38 inline int os::file_name_strncmp(const char* s1, const char* s2, size_t num) {
39 return strncmp(s1, s2, num);
40 }
41
42 inline bool os::uses_stack_guard_pages() {
43 return true;
44 }
45
46 inline bool os::must_commit_stack_guard_pages() {
47 assert(uses_stack_guard_pages(), "sanity check");
48 #if !defined(__FreeBSD__) || __FreeBSD__ < 5
49 // Since FreeBSD 4 uses malloc() for allocating the thread stack
50 // there is no need to do anything extra to allocate the guard pages
51 return false;
52 #else
53 // FreeBSD 5+ uses mmap MAP_STACK for allocating the thread stacks.
54 // Must 'allocate' them or guard pages are ignored.
55 return true;
56 #endif
57 }
58
59
60 // On Bsd, reservations are made on a page by page basis, nothing to do.
61 inline void os::pd_split_reserved_memory(char *base, size_t size,
62 size_t split, bool realloc) {
63 }
64
65
66 // Bang the shadow pages if they need to be touched to be mapped.
67 inline void os::map_stack_shadow_pages(address sp) {
68 }
69
70 inline void os::dll_unload(void *lib) {
71 ::dlclose(lib);
72 }
73
74 inline const int os::default_file_open_flags() { return 0;}
75
76 inline jlong os::lseek(int fd, jlong offset, int whence) {
77 return (jlong) ::lseek(fd, offset, whence);
78 }
79
80 inline int os::fsync(int fd) {
81 return ::fsync(fd);
82 }
83
84 inline int os::ftruncate(int fd, jlong length) {
85 return ::ftruncate(fd, length);
86 }
87
88 // macros for restartable system calls
89
90 #define RESTARTABLE(_cmd, _result) do { \
91 _result = _cmd; \
92 } while(((int)_result == OS_ERR) && (errno == EINTR))
93
94 #define RESTARTABLE_RETURN_INT(_cmd) do { \
95 int _result; \
96 RESTARTABLE(_cmd, _result); \
97 return _result; \
98 } while(false)
99
100 inline bool os::numa_has_static_binding() { return true; }
101 inline bool os::numa_has_group_homing() { return false; }
102
103 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
104 size_t res;
105 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res);
106 return res;
107 }
108
109 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
110 size_t res;
111 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
112 return res;
113 }
114
115 inline int os::close(int fd) {
116 return ::close(fd);
117 }
118
119 inline int os::socket_close(int fd) {
120 return ::close(fd);
121 }
122
123 inline int os::socket(int domain, int type, int protocol) {
124 return ::socket(domain, type, protocol);
125 }
126
127 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
128 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags));
129 }
130
131 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) {
132 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
133 }
134
135 inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
136 return os::send(fd, buf, nBytes, flags);
137 }
138
139 inline int os::connect(int fd, struct sockaddr* him, socklen_t len) {
140 RESTARTABLE_RETURN_INT(::connect(fd, him, len));
141 }
142
143 inline struct hostent* os::get_host_by_name(char* name) {
144 return ::gethostbyname(name);
145 }
146
147 inline bool os::supports_monotonic_clock() {
148 #ifdef __APPLE__
149 return true;
150 #else
151 return Bsd::_clock_gettime != NULL;
152 #endif
153 }
154
155 inline void os::exit(int num) {
156 ::exit(num);
157 }
158
159 #endif // OS_BSD_VM_OS_BSD_INLINE_HPP