os_solaris.inline.hpp revision 196:d1605aabd0a1 
1/*
2 * Copyright 1997-2008 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25inline const char* os::file_separator() { return "/"; }
26inline const char* os::line_separator() { return "\n"; }
27inline const char* os::path_separator() { return ":"; }
28
29inline const char* os::jlong_format_specifier()   { return "%lld"; }
30inline const char* os::julong_format_specifier()  { return "%llu"; }
31
32// File names are case-sensitive on windows only
33inline int os::file_name_strcmp(const char* s1, const char* s2) {
34  return strcmp(s1, s2);
35}
36
37inline bool os::uses_stack_guard_pages() {
38  return true;
39}
40
41inline 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.
50inline 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.
56inline void os::bang_stack_shadow_pages() {
57}
58
59inline DIR* os::opendir(const char* dirname)
60{
61  assert(dirname != NULL, "just checking");
62  return ::opendir(dirname);
63}
64
65inline 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
71inline 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
88inline 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) \
100do { \
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
208inline bool os::numa_has_static_binding()   { return false; }
209inline bool os::numa_has_group_homing()     { return true;  }
210