1 /*
2 * Copyright (c) 1997, 2008, 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 inline const char* os::file_separator() { return "/"; }
26 inline const char* os::line_separator() { return "\n"; }
27 inline const char* os::path_separator() { return ":"; }
28
29 inline const char* os::jlong_format_specifier() { return "%lld"; }
30 inline const char* os::julong_format_specifier() { return "%llu"; }
31
32 // File names are case-sensitive on windows only
33 inline int os::file_name_strcmp(const char* s1, const char* s2) {
34 return strcmp(s1, s2);
35 }
36
37 inline bool os::uses_stack_guard_pages() {
38 return true;
39 }
40
41 inline bool os::allocate_stack_guard_pages() {
42 assert(uses_stack_guard_pages(), "sanity check");
43 int r = thr_main() ;
44 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
45 return r;
46 }
47
48
49 // On Solaris, reservations are made on a page by page basis, nothing to do.
50 inline void os::split_reserved_memory(char *base, size_t size,
51 size_t split, bool realloc) {
52 }
53
54
55 // Bang the shadow pages if they need to be touched to be mapped.
56 inline void os::bang_stack_shadow_pages() {
57 }
58
59 inline DIR* os::opendir(const char* dirname)
60 {
61 assert(dirname != NULL, "just checking");
62 return ::opendir(dirname);
63 }
64
65 inline int os::readdir_buf_size(const char *path)
66 {
67 int size = pathconf(path, _PC_NAME_MAX);
68 return (size < 0 ? MAXPATHLEN : size) + sizeof(dirent) + 1;
69 }
70
71 inline struct dirent* os::readdir(DIR* dirp, dirent* dbuf)
72 {
73 assert(dirp != NULL, "just checking");
74 #if defined(_LP64) || defined(_GNU_SOURCE)
75 dirent* p;
76 int status;
77
78 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) {
79 errno = status;
80 return NULL;
81 } else
82 return p;
83 #else // defined(_LP64) || defined(_GNU_SOURCE)
84 return ::readdir_r(dirp, dbuf);
85 #endif // defined(_LP64) || defined(_GNU_SOURCE)
86 }
87
88 inline int os::closedir(DIR *dirp)
89 {
90 assert(dirp != NULL, "just checking");
91 return ::closedir(dirp);
92 }
93
94 //////////////////////////////////////////////////////////////////////////////
95 ////////////////////////////////////////////////////////////////////////////////
96
97 // macros for interruptible io and system calls and system call restarting
98
99 #define _INTERRUPTIBLE(_setup, _cmd, _result, _thread, _clear, _before, _after, _int_enable) \
100 do { \
101 _setup; \
102 _before; \
103 OSThread* _osthread = _thread->osthread(); \
104 if (_int_enable && _thread->has_last_Java_frame()) { \
105 /* this is java interruptible io stuff */ \
106 if (os::is_interrupted(_thread, _clear)) { \
107 os::Solaris::bump_interrupted_before_count(); \
108 _result = OS_INTRPT; \
109 } else { \
110 /* _cmd always expands to an assignment to _result */ \
111 if ((_cmd) < 0 && errno == EINTR \
112 && os::is_interrupted(_thread, _clear)) { \
113 os::Solaris::bump_interrupted_during_count(); \
114 _result = OS_INTRPT; \
115 } \
116 } \
117 } else { \
118 /* this is normal blocking io stuff */ \
119 _cmd; \
120 } \
121 _after; \
122 } while(false)
123
124 // Interruptible io support + restarting of interrupted system calls
125
126 #ifndef ASSERT
127
128 #define INTERRUPTIBLE(_cmd, _result, _clear) do { \
129 _INTERRUPTIBLE( JavaThread* _thread = (JavaThread*)ThreadLocalStorage::thread(),_result = _cmd, _result, _thread, _clear, , , UseVMInterruptibleIO); \
130 } while((_result == OS_ERR) && (errno == EINTR))
131
132 #else
133
134 // This adds an assertion that it is only called from thread_in_native
135 // The call overhead is skipped for performance in product mode
136 #define INTERRUPTIBLE(_cmd, _result, _clear) do { \
137 _INTERRUPTIBLE(JavaThread* _thread = os::Solaris::setup_interruptible_native(), _result = _cmd, _result, _thread, _clear, , os::Solaris::cleanup_interruptible_native(_thread), UseVMInterruptibleIO ); \
138 } while((_result == OS_ERR) && (errno == EINTR))
139
140 #endif
141
142 // Used for calls from _thread_in_vm, not from _thread_in_native
143 #define INTERRUPTIBLE_VM(_cmd, _result, _clear) do { \
144 _INTERRUPTIBLE(JavaThread* _thread = os::Solaris::setup_interruptible(), _result = _cmd, _result, _thread, _clear, , os::Solaris::cleanup_interruptible(_thread), UseVMInterruptibleIO ); \
145 } while((_result == OS_ERR) && (errno == EINTR))
146
147 /* Use NORESTART when the system call cannot return EINTR, when something other
148 than a system call is being invoked, or when the caller must do EINTR
149 handling. */
150
151 #ifndef ASSERT
152
153 #define INTERRUPTIBLE_NORESTART(_cmd, _result, _clear) \
154 _INTERRUPTIBLE( JavaThread* _thread = (JavaThread*)ThreadLocalStorage::thread(),_result = _cmd, _result, _thread, _clear, , , UseVMInterruptibleIO)
155
156 #else
157
158 // This adds an assertion that it is only called from thread_in_native
159 // The call overhead is skipped for performance in product mode
160 #define INTERRUPTIBLE_NORESTART(_cmd, _result, _clear) \
161 _INTERRUPTIBLE(JavaThread* _thread = os::Solaris::setup_interruptible_native(), _result = _cmd, _result, _thread, _clear, , os::Solaris::cleanup_interruptible_native(_thread), UseVMInterruptibleIO )
162
163 #endif
164
165 // Don't attend to UseVMInterruptibleIO. Always allow interruption.
166 // Also assumes that it is called from the _thread_blocked state.
167 // Used by os_sleep().
168
169 #define INTERRUPTIBLE_NORESTART_VM_ALWAYS(_cmd, _result, _thread, _clear) \
170 _INTERRUPTIBLE(os::Solaris::setup_interruptible_already_blocked(_thread), _result = _cmd, _result, _thread, _clear, , , true )
171
172 #define INTERRUPTIBLE_RETURN_INT(_cmd, _clear) do { \
173 int _result; \
174 do { \
175 INTERRUPTIBLE(_cmd, _result, _clear); \
176 } while((_result == OS_ERR) && (errno == EINTR)); \
177 return _result; \
178 } while(false)
179
180 #define INTERRUPTIBLE_RETURN_INT_VM(_cmd, _clear) do { \
181 int _result; \
182 do { \
183 INTERRUPTIBLE_VM(_cmd, _result, _clear); \
184 } while((_result == OS_ERR) && (errno == EINTR)); \
185 return _result; \
186 } while(false)
187
188 #define INTERRUPTIBLE_RETURN_INT_NORESTART(_cmd, _clear) do { \
189 int _result; \
190 INTERRUPTIBLE_NORESTART(_cmd, _result, _clear); \
191 return _result; \
192 } while(false)
193
194 /* Use the RESTARTABLE macros when interruptible io is not needed */
195
196 #define RESTARTABLE(_cmd, _result) do { \
197 do { \
198 _result = _cmd; \
199 } while((_result == OS_ERR) && (errno == EINTR)); \
200 } while(false)
201
202 #define RESTARTABLE_RETURN_INT(_cmd) do { \
203 int _result; \
204 RESTARTABLE(_cmd, _result); \
205 return _result; \
206 } while(false)
207
208 inline bool os::numa_has_static_binding() { return false; }
209 inline bool os::numa_has_group_homing() { return true; }