1 /*
2 * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2018 SAP SE. 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_OS_AIX_INLINE_HPP
27 #define OS_AIX_OS_AIX_INLINE_HPP
28
29 #include "runtime/os.hpp"
30 #include "os_posix.inline.hpp"
31
32 // System includes
33
34 #include <unistd.h>
35 #include <sys/socket.h>
36 #include <poll.h>
37 #include <sys/ioctl.h>
38 #include <netdb.h>
39
40 inline bool os::uses_stack_guard_pages() {
41 return true;
42 }
43
44 // Whether or not calling code should/can commit/uncommit stack pages
45 // before guarding them. Answer for AIX is definitly no, because memory
46 // is automatically committed on touch.
47 inline bool os::must_commit_stack_guard_pages() {
48 assert(uses_stack_guard_pages(), "sanity check");
49 return false;
50 }
51
52 // On Aix, reservations are made on a page by page basis, nothing to do.
53 inline void os::pd_split_reserved_memory(char *base, size_t size,
54 size_t split, bool realloc) {
55 // TODO: Determine whether Sys V memory is split. If yes, we need to treat
56 // this the same way Windows treats its VirtualAlloc allocations.
57 }
58
59 // Bang the shadow pages if they need to be touched to be mapped.
60 inline void os::map_stack_shadow_pages(address sp) {
61 }
62
63 inline void os::dll_unload(void *lib) {
64 ::dlclose(lib);
65 }
66
67 inline jlong os::lseek(int fd, jlong offset, int whence) {
68 return (jlong) ::lseek64(fd, offset, whence);
69 }
70
71 inline int os::fsync(int fd) {
72 return ::fsync(fd);
73 }
74
75 inline int os::ftruncate(int fd, jlong length) {
76 return ::ftruncate64(fd, length);
77 }
78
79 // macros for restartable system calls
80
81 #define RESTARTABLE(_cmd, _result) do { \
82 _result = _cmd; \
83 } while(((int)_result == OS_ERR) && (errno == EINTR))
84
85 #define RESTARTABLE_RETURN_INT(_cmd) do { \
86 int _result; \
87 RESTARTABLE(_cmd, _result); \
88 return _result; \
89 } while(false)
90
91 // We don't have NUMA support on Aix, but we need this for compilation.
92 inline bool os::numa_has_static_binding() { ShouldNotReachHere(); return true; }
93 inline bool os::numa_has_group_homing() { ShouldNotReachHere(); return false; }
94
95 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
96 size_t res;
97 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
98 return res;
99 }
100
101 inline int os::close(int fd) {
102 return ::close(fd);
103 }
104
105 inline int os::socket_close(int fd) {
106 return ::close(fd);
107 }
108
109 inline int os::socket(int domain, int type, int protocol) {
110 return ::socket(domain, type, protocol);
111 }
112
113 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
114 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags));
115 }
116
117 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) {
118 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
119 }
120
121 inline int os::raw_send(int fd, char *buf, size_t nBytes, uint flags) {
122 return os::send(fd, buf, nBytes, flags);
123 }
124
125 inline int os::connect(int fd, struct sockaddr *him, socklen_t len) {
126 RESTARTABLE_RETURN_INT(::connect(fd, him, len));
127 }
128
129 inline struct hostent* os::get_host_by_name(char* name) {
130 return ::gethostbyname(name);
131 }
132
133 inline bool os::supports_monotonic_clock() {
134 // mread_real_time() is monotonic on AIX (see os::javaTimeNanos() comments)
135 return true;
136 }
137
138 inline void os::exit(int num) {
139 ::exit(num);
140 }
141
142 #endif // OS_AIX_OS_AIX_INLINE_HPP