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1 /*
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196
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2 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 inline const char* os::file_separator() { return "/"; }
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26 inline const char* os::line_separator() { return "\n"; }
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27 inline const char* os::path_separator() { return ":"; }
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28
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29 inline const char* os::jlong_format_specifier() { return "%lld"; }
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30 inline const char* os::julong_format_specifier() { return "%llu"; }
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31
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32 // File names are case-sensitive on windows only
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33 inline int os::file_name_strcmp(const char* s1, const char* s2) {
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34 return strcmp(s1, s2);
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35 }
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36
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37 inline bool os::uses_stack_guard_pages() {
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38 return true;
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39 }
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40
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41 inline bool os::allocate_stack_guard_pages() {
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42 assert(uses_stack_guard_pages(), "sanity check");
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43 int r = thr_main() ;
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44 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
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45 return r;
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46 }
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47
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48
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49 // On Solaris, reservations are made on a page by page basis, nothing to do.
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50 inline void os::split_reserved_memory(char *base, size_t size,
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51 size_t split, bool realloc) {
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52 }
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53
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54
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55 // Bang the shadow pages if they need to be touched to be mapped.
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56 inline void os::bang_stack_shadow_pages() {
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57 }
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58
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59 inline DIR* os::opendir(const char* dirname)
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60 {
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61 assert(dirname != NULL, "just checking");
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62 return ::opendir(dirname);
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63 }
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64
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65 inline int os::readdir_buf_size(const char *path)
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66 {
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67 int size = pathconf(path, _PC_NAME_MAX);
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68 return (size < 0 ? MAXPATHLEN : size) + sizeof(dirent) + 1;
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69 }
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70
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71 inline struct dirent* os::readdir(DIR* dirp, dirent* dbuf)
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72 {
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73 assert(dirp != NULL, "just checking");
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74 #if defined(_LP64) || defined(_GNU_SOURCE)
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75 dirent* p;
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76 int status;
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77
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78 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) {
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79 errno = status;
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80 return NULL;
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81 } else
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82 return p;
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83 #else // defined(_LP64) || defined(_GNU_SOURCE)
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84 return ::readdir_r(dirp, dbuf);
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85 #endif // defined(_LP64) || defined(_GNU_SOURCE)
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86 }
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87
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88 inline int os::closedir(DIR *dirp)
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89 {
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90 assert(dirp != NULL, "just checking");
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91 return ::closedir(dirp);
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92 }
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93
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94 //////////////////////////////////////////////////////////////////////////////
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95 ////////////////////////////////////////////////////////////////////////////////
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96
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97 // macros for interruptible io and system calls and system call restarting
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98
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99 #define _INTERRUPTIBLE(_setup, _cmd, _result, _thread, _clear, _before, _after, _int_enable) \
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100 do { \
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101 _setup; \
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102 _before; \
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103 OSThread* _osthread = _thread->osthread(); \
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104 if (_int_enable && _thread->has_last_Java_frame()) { \
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105 /* this is java interruptible io stuff */ \
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106 if (os::is_interrupted(_thread, _clear)) { \
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107 os::Solaris::bump_interrupted_before_count(); \
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108 _result = OS_INTRPT; \
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109 } else { \
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110 /* _cmd always expands to an assignment to _result */ \
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111 if ((_cmd) < 0 && errno == EINTR \
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112 && os::is_interrupted(_thread, _clear)) { \
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113 os::Solaris::bump_interrupted_during_count(); \
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114 _result = OS_INTRPT; \
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115 } \
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116 } \
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117 } else { \
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118 /* this is normal blocking io stuff */ \
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119 _cmd; \
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120 } \
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121 _after; \
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122 } while(false)
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123
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124 // Interruptible io support + restarting of interrupted system calls
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125
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126 #ifndef ASSERT
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127
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128 #define INTERRUPTIBLE(_cmd, _result, _clear) do { \
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129 _INTERRUPTIBLE( JavaThread* _thread = (JavaThread*)ThreadLocalStorage::thread(),_result = _cmd, _result, _thread, _clear, , , UseVMInterruptibleIO); \
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130 } while((_result == OS_ERR) && (errno == EINTR))
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131
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132 #else
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133
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134 // This adds an assertion that it is only called from thread_in_native
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135 // The call overhead is skipped for performance in product mode
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136 #define INTERRUPTIBLE(_cmd, _result, _clear) do { \
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137 _INTERRUPTIBLE(JavaThread* _thread = os::Solaris::setup_interruptible_native(), _result = _cmd, _result, _thread, _clear, , os::Solaris::cleanup_interruptible_native(_thread), UseVMInterruptibleIO ); \
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138 } while((_result == OS_ERR) && (errno == EINTR))
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139
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140 #endif
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141
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142 // Used for calls from _thread_in_vm, not from _thread_in_native
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143 #define INTERRUPTIBLE_VM(_cmd, _result, _clear) do { \
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144 _INTERRUPTIBLE(JavaThread* _thread = os::Solaris::setup_interruptible(), _result = _cmd, _result, _thread, _clear, , os::Solaris::cleanup_interruptible(_thread), UseVMInterruptibleIO ); \
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145 } while((_result == OS_ERR) && (errno == EINTR))
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146
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147 /* Use NORESTART when the system call cannot return EINTR, when something other
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148 than a system call is being invoked, or when the caller must do EINTR
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149 handling. */
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150
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151 #ifndef ASSERT
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152
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153 #define INTERRUPTIBLE_NORESTART(_cmd, _result, _clear) \
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154 _INTERRUPTIBLE( JavaThread* _thread = (JavaThread*)ThreadLocalStorage::thread(),_result = _cmd, _result, _thread, _clear, , , UseVMInterruptibleIO)
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155
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156 #else
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157
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158 // This adds an assertion that it is only called from thread_in_native
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159 // The call overhead is skipped for performance in product mode
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160 #define INTERRUPTIBLE_NORESTART(_cmd, _result, _clear) \
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161 _INTERRUPTIBLE(JavaThread* _thread = os::Solaris::setup_interruptible_native(), _result = _cmd, _result, _thread, _clear, , os::Solaris::cleanup_interruptible_native(_thread), UseVMInterruptibleIO )
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162
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163 #endif
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164
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165 // Don't attend to UseVMInterruptibleIO. Always allow interruption.
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166 // Also assumes that it is called from the _thread_blocked state.
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167 // Used by os_sleep().
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168
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169 #define INTERRUPTIBLE_NORESTART_VM_ALWAYS(_cmd, _result, _thread, _clear) \
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170 _INTERRUPTIBLE(os::Solaris::setup_interruptible_already_blocked(_thread), _result = _cmd, _result, _thread, _clear, , , true )
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171
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172 #define INTERRUPTIBLE_RETURN_INT(_cmd, _clear) do { \
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173 int _result; \
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174 do { \
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175 INTERRUPTIBLE(_cmd, _result, _clear); \
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176 } while((_result == OS_ERR) && (errno == EINTR)); \
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177 return _result; \
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178 } while(false)
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179
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180 #define INTERRUPTIBLE_RETURN_INT_VM(_cmd, _clear) do { \
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181 int _result; \
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182 do { \
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183 INTERRUPTIBLE_VM(_cmd, _result, _clear); \
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184 } while((_result == OS_ERR) && (errno == EINTR)); \
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185 return _result; \
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186 } while(false)
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187
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188 #define INTERRUPTIBLE_RETURN_INT_NORESTART(_cmd, _clear) do { \
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189 int _result; \
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190 INTERRUPTIBLE_NORESTART(_cmd, _result, _clear); \
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191 return _result; \
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192 } while(false)
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193
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194 /* Use the RESTARTABLE macros when interruptible io is not needed */
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195
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196 #define RESTARTABLE(_cmd, _result) do { \
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197 do { \
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198 _result = _cmd; \
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199 } while((_result == OS_ERR) && (errno == EINTR)); \
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200 } while(false)
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201
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202 #define RESTARTABLE_RETURN_INT(_cmd) do { \
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203 int _result; \
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204 RESTARTABLE(_cmd, _result); \
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205 return _result; \
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206 } while(false)
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207
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208 inline bool os::numa_has_static_binding() { return false; }
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209 inline bool os::numa_has_group_homing() { return true; }
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