3960
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1 /*
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2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef OS_BSD_VM_OS_BSD_INLINE_HPP
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26 #define OS_BSD_VM_OS_BSD_INLINE_HPP
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27
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28 #include "runtime/atomic.hpp"
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29 #include "runtime/os.hpp"
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30 #ifdef TARGET_OS_ARCH_bsd_x86
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31 # include "atomic_bsd_x86.inline.hpp"
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32 # include "orderAccess_bsd_x86.inline.hpp"
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33 #endif
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34 #ifdef TARGET_OS_ARCH_bsd_zero
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35 # include "atomic_bsd_zero.inline.hpp"
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36 # include "orderAccess_bsd_zero.inline.hpp"
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37 #endif
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38
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39 // System includes
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40
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41 #include <unistd.h>
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42 #include <sys/socket.h>
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43 #include <sys/poll.h>
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44 #include <netdb.h>
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45
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46 inline void* os::thread_local_storage_at(int index) {
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47 return pthread_getspecific((pthread_key_t)index);
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48 }
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49
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50 inline const char* os::file_separator() {
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51 return "/";
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52 }
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53
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54 inline const char* os::line_separator() {
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55 return "\n";
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56 }
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57
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58 inline const char* os::path_separator() {
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59 return ":";
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60 }
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61
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62 inline const char* os::jlong_format_specifier() {
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63 return "%lld";
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64 }
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65
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66 inline const char* os::julong_format_specifier() {
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67 return "%llu";
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68 }
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69
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70 // File names are case-sensitive on windows only
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71 inline int os::file_name_strcmp(const char* s1, const char* s2) {
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72 return strcmp(s1, s2);
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73 }
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74
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75 inline bool os::obsolete_option(const JavaVMOption *option) {
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76 return false;
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77 }
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78
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79 inline bool os::uses_stack_guard_pages() {
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80 return true;
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81 }
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82
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83 inline bool os::allocate_stack_guard_pages() {
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84 assert(uses_stack_guard_pages(), "sanity check");
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85 #if !defined(__FreeBSD__) || __FreeBSD__ < 5
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86 // Since FreeBSD 4 uses malloc() for allocating the thread stack
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87 // there is no need to do anything extra to allocate the guard pages
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88 return false;
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89 #else
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90 // FreeBSD 5+ uses mmap MAP_STACK for allocating the thread stacks.
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91 // Must 'allocate' them or guard pages are ignored.
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92 return true;
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93 #endif
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94 }
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95
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96
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97 // On Bsd, reservations are made on a page by page basis, nothing to do.
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98 inline void os::split_reserved_memory(char *base, size_t size,
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99 size_t split, bool realloc) {
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100 }
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101
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102
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103 // Bang the shadow pages if they need to be touched to be mapped.
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104 inline void os::bang_stack_shadow_pages() {
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105 }
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106
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107 inline void os::dll_unload(void *lib) {
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108 ::dlclose(lib);
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109 }
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110
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111 inline const int os::default_file_open_flags() { return 0;}
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112
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113 inline DIR* os::opendir(const char* dirname)
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114 {
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115 assert(dirname != NULL, "just checking");
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116 return ::opendir(dirname);
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117 }
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118
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119 inline int os::readdir_buf_size(const char *path)
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120 {
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121 return NAME_MAX + sizeof(dirent) + 1;
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122 }
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123
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124 inline jlong os::lseek(int fd, jlong offset, int whence) {
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125 return (jlong) ::lseek(fd, offset, whence);
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126 }
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127
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128 inline int os::fsync(int fd) {
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129 return ::fsync(fd);
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130 }
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131
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132 inline char* os::native_path(char *path) {
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133 return path;
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134 }
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135
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136 inline int os::ftruncate(int fd, jlong length) {
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137 return ::ftruncate(fd, length);
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138 }
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139
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140 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf)
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141 {
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142 dirent* p;
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143 int status;
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144 assert(dirp != NULL, "just checking");
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145
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146 // NOTE: Bsd readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX
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147 // version. Here is the doc for this function:
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148 // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html
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149
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150 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) {
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151 errno = status;
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152 return NULL;
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153 } else
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154 return p;
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155 }
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156
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157 inline int os::closedir(DIR *dirp) {
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158 assert(dirp != NULL, "argument is NULL");
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159 return ::closedir(dirp);
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160 }
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161
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162 // macros for restartable system calls
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163
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164 #define RESTARTABLE(_cmd, _result) do { \
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165 _result = _cmd; \
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166 } while(((int)_result == OS_ERR) && (errno == EINTR))
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167
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168 #define RESTARTABLE_RETURN_INT(_cmd) do { \
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169 int _result; \
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170 RESTARTABLE(_cmd, _result); \
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171 return _result; \
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172 } while(false)
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173
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174 inline bool os::numa_has_static_binding() { return true; }
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175 inline bool os::numa_has_group_homing() { return false; }
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176
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177 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
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178 size_t res;
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179 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res);
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180 return res;
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181 }
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182
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183 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
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184 size_t res;
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185 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
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186 return res;
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187 }
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188
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189 inline int os::close(int fd) {
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190 RESTARTABLE_RETURN_INT(::close(fd));
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191 }
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192
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193 inline int os::socket_close(int fd) {
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194 RESTARTABLE_RETURN_INT(::close(fd));
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195 }
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196
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197 inline int os::socket(int domain, int type, int protocol) {
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198 return ::socket(domain, type, protocol);
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199 }
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200
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201 inline int os::recv(int fd, char *buf, int nBytes, int flags) {
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202 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, (unsigned int) flags));
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203 }
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204
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205 inline int os::send(int fd, char *buf, int nBytes, int flags) {
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206 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, (unsigned int) flags));
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207 }
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208
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209 inline int os::raw_send(int fd, char *buf, int nBytes, int flags) {
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210 return os::send(fd, buf, nBytes, flags);
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211 }
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212
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213 inline int os::timeout(int fd, long timeout) {
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214 julong prevtime,newtime;
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215 struct timeval t;
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216
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217 gettimeofday(&t, NULL);
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218 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
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219
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220 for(;;) {
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221 struct pollfd pfd;
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222
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223 pfd.fd = fd;
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224 pfd.events = POLLIN | POLLERR;
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225
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226 int res = ::poll(&pfd, 1, timeout);
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227
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228 if (res == OS_ERR && errno == EINTR) {
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229
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230 // On Bsd any value < 0 means "forever"
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231
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232 if(timeout >= 0) {
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233 gettimeofday(&t, NULL);
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234 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
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235 timeout -= newtime - prevtime;
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236 if(timeout <= 0)
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237 return OS_OK;
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238 prevtime = newtime;
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239 }
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240 } else
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241 return res;
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242 }
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243 }
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244
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245 inline int os::listen(int fd, int count) {
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246 return ::listen(fd, count);
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247 }
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248
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249 inline int os::connect(int fd, struct sockaddr *him, int len) {
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250 RESTARTABLE_RETURN_INT(::connect(fd, him, len));
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251 }
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252
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253 inline int os::accept(int fd, struct sockaddr *him, int *len) {
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254 // This cast is from int to unsigned int on bsd. Since we
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255 // only pass the parameter "len" around the vm and don't try to
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256 // fetch it's value, this cast is safe for now. The java.net group
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257 // may need and want to change this interface someday if socklen_t goes
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258 // to 64 bits on some platform that we support.
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259
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260 // At least OpenBSD and FreeBSD can return EINTR from accept.
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261 RESTARTABLE_RETURN_INT(::accept(fd, him, (socklen_t *)len));
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262 }
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263
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264 inline int os::recvfrom(int fd, char *buf, int nBytes, int flags,
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265 sockaddr *from, int *fromlen) {
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266 RESTARTABLE_RETURN_INT(::recvfrom(fd, buf, nBytes, (unsigned int) flags, from, (socklen_t *)fromlen));
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267 }
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268
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269 inline int os::sendto(int fd, char *buf, int len, int flags,
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270 struct sockaddr *to, int tolen) {
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271 RESTARTABLE_RETURN_INT(::sendto(fd, buf, len, (unsigned int) flags, to, tolen));
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272 }
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273
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274 inline int os::socket_shutdown(int fd, int howto){
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275 return ::shutdown(fd, howto);
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276 }
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277
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278 inline int os::bind(int fd, struct sockaddr *him, int len){
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279 return ::bind(fd, him, len);
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280 }
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281
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282 inline int os::get_sock_name(int fd, struct sockaddr *him, int *len){
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283 return ::getsockname(fd, him, (socklen_t *)len);
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284 }
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285
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286 inline int os::get_host_name(char* name, int namelen){
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287 return ::gethostname(name, namelen);
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288 }
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289
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290 inline struct hostent* os::get_host_by_name(char* name) {
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291 return ::gethostbyname(name);
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292 }
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293 inline int os::get_sock_opt(int fd, int level, int optname,
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294 char *optval, int* optlen){
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295 return ::getsockopt(fd, level, optname, optval, (socklen_t *)optlen);
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296 }
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297
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298 inline int os::set_sock_opt(int fd, int level, int optname,
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299 const char *optval, int optlen){
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300 return ::setsockopt(fd, level, optname, optval, optlen);
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301 }
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302 #endif // OS_BSD_VM_OS_BSD_INLINE_HPP
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