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; }