1 /*
   2  * Copyright (c) 1997, 2013, 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 #ifndef OS_SOLARIS_VM_OS_SOLARIS_INLINE_HPP
  26 #define OS_SOLARIS_VM_OS_SOLARIS_INLINE_HPP
  27 
  28 #include "runtime/atomic.inline.hpp"
  29 #include "runtime/os.hpp"
  30 
  31 #ifdef TARGET_OS_ARCH_solaris_x86
  32 # include "orderAccess_solaris_x86.inline.hpp"
  33 #endif
  34 #ifdef TARGET_OS_ARCH_solaris_sparc
  35 # include "orderAccess_solaris_sparc.inline.hpp"
  36 #endif
  37 
  38 // System includes
  39 #include <sys/param.h>
  40 #include <dlfcn.h>
  41 #include <sys/socket.h>
  42 #include <sys/poll.h>
  43 #include <sys/filio.h>
  44 #include <unistd.h>
  45 #include <netdb.h>
  46 #include <setjmp.h>
  47 
  48 inline const char* os::file_separator() { return "/"; }
  49 inline const char* os::line_separator() { return "\n"; }
  50 inline const char* os::path_separator() { return ":"; }
  51 
  52 // File names are case-sensitive on windows only
  53 inline int os::file_name_strcmp(const char* s1, const char* s2) {
  54   return strcmp(s1, s2);
  55 }
  56 
  57 inline bool os::uses_stack_guard_pages() {
  58   return true;
  59 }
  60 
  61 inline bool os::allocate_stack_guard_pages() {
  62   assert(uses_stack_guard_pages(), "sanity check");
  63   int r = thr_main() ;
  64   guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ;
  65   return r;
  66 }
  67 
  68 
  69 // On Solaris, reservations are made on a page by page basis, nothing to do.
  70 inline void os::pd_split_reserved_memory(char *base, size_t size,
  71                                       size_t split, bool realloc) {
  72 }
  73 
  74 
  75 // Bang the shadow pages if they need to be touched to be mapped.
  76 inline void os::bang_stack_shadow_pages() {
  77 }
  78 inline void os::dll_unload(void *lib) { ::dlclose(lib); }
  79 
  80 inline DIR* os::opendir(const char* dirname) {
  81   assert(dirname != NULL, "just checking");
  82   return ::opendir(dirname);
  83 }
  84 
  85 inline int os::readdir_buf_size(const char *path) {
  86   int size = pathconf(path, _PC_NAME_MAX);
  87   return (size < 0 ? MAXPATHLEN : size) + sizeof(dirent) + 1;
  88 }
  89 
  90 inline struct dirent* os::readdir(DIR* dirp, dirent* dbuf) {
  91   assert(dirp != NULL, "just checking");
  92 #if defined(_LP64) || defined(_GNU_SOURCE) || _FILE_OFFSET_BITS==64
  93   dirent* p;
  94   int status;
  95 
  96   if((status = ::readdir_r(dirp, dbuf, &p)) != 0) {
  97     errno = status;
  98     return NULL;
  99   } else
 100     return p;
 101 #else  // defined(_LP64) || defined(_GNU_SOURCE) || _FILE_OFFSET_BITS==64
 102   return ::readdir_r(dirp, dbuf);
 103 #endif // defined(_LP64) || defined(_GNU_SOURCE) || _FILE_OFFSET_BITS==64
 104 }
 105 
 106 inline int os::closedir(DIR *dirp) {
 107   assert(dirp != NULL, "argument is NULL");
 108   return ::closedir(dirp);
 109 }
 110 
 111 //////////////////////////////////////////////////////////////////////////////
 112 ////////////////////////////////////////////////////////////////////////////////
 113 
 114 // macros for interruptible io and system calls and system call restarting
 115 
 116 #define _INTERRUPTIBLE(_setup, _cmd, _result, _thread, _clear, _before, _after, _int_enable) \
 117 do { \
 118   _setup; \
 119   _before; \
 120   OSThread* _osthread = _thread->osthread(); \
 121   if (_int_enable && _thread->has_last_Java_frame()) { \
 122     /* this is java interruptible io stuff */ \
 123     if (os::is_interrupted(_thread, _clear))  { \
 124       os::Solaris::bump_interrupted_before_count(); \
 125       _result = OS_INTRPT; \
 126     } else { \
 127       /* _cmd always expands to an assignment to _result */ \
 128       if ((_cmd) < 0 && errno == EINTR  \
 129        && os::is_interrupted(_thread, _clear)) { \
 130         os::Solaris::bump_interrupted_during_count(); \
 131         _result = OS_INTRPT; \
 132       } \
 133     } \
 134   } else { \
 135     /* this is normal blocking io stuff */ \
 136     _cmd; \
 137   } \
 138   _after; \
 139 } while(false)
 140 
 141 // Interruptible io support + restarting of interrupted system calls
 142 
 143 #ifndef ASSERT
 144 
 145 #define INTERRUPTIBLE(_cmd, _result, _clear) do { \
 146   _INTERRUPTIBLE( JavaThread* _thread = (JavaThread*)ThreadLocalStorage::thread(),_result = _cmd, _result, _thread, _clear, , , UseVMInterruptibleIO); \
 147 } while((_result == OS_ERR) && (errno == EINTR))
 148 
 149 #else
 150 
 151 // This adds an assertion that it is only called from thread_in_native
 152 // The call overhead is skipped for performance in product mode
 153 #define INTERRUPTIBLE(_cmd, _result, _clear) do { \
 154   _INTERRUPTIBLE(JavaThread* _thread = os::Solaris::setup_interruptible_native(), _result = _cmd, _result, _thread, _clear, , os::Solaris::cleanup_interruptible_native(_thread), UseVMInterruptibleIO ); \
 155 } while((_result == OS_ERR) && (errno == EINTR))
 156 
 157 #endif
 158 
 159 // Used for calls from _thread_in_vm, not from _thread_in_native
 160 #define INTERRUPTIBLE_VM(_cmd, _result, _clear) do { \
 161   _INTERRUPTIBLE(JavaThread* _thread = os::Solaris::setup_interruptible(), _result = _cmd, _result, _thread, _clear, , os::Solaris::cleanup_interruptible(_thread), UseVMInterruptibleIO ); \
 162 } while((_result == OS_ERR) && (errno == EINTR))
 163 
 164 /* Use NORESTART when the system call cannot return EINTR, when something other
 165    than a system call is being invoked, or when the caller must do EINTR
 166    handling. */
 167 
 168 #ifndef ASSERT
 169 
 170 #define INTERRUPTIBLE_NORESTART(_cmd, _result, _clear) \
 171   _INTERRUPTIBLE( JavaThread* _thread = (JavaThread*)ThreadLocalStorage::thread(),_result = _cmd, _result, _thread, _clear, , , UseVMInterruptibleIO)
 172 
 173 #else
 174 
 175 // This adds an assertion that it is only called from thread_in_native
 176 // The call overhead is skipped for performance in product mode
 177 #define INTERRUPTIBLE_NORESTART(_cmd, _result, _clear) \
 178   _INTERRUPTIBLE(JavaThread* _thread = os::Solaris::setup_interruptible_native(), _result = _cmd, _result, _thread, _clear, , os::Solaris::cleanup_interruptible_native(_thread), UseVMInterruptibleIO )
 179 
 180 #endif
 181 
 182 // Don't attend to UseVMInterruptibleIO. Always allow interruption.
 183 // Also assumes that it is called from the _thread_blocked state.
 184 // Used by os_sleep().
 185 
 186 #define INTERRUPTIBLE_NORESTART_VM_ALWAYS(_cmd, _result, _thread, _clear) \
 187   _INTERRUPTIBLE(os::Solaris::setup_interruptible_already_blocked(_thread), _result = _cmd, _result, _thread, _clear, , , true )
 188 
 189 #define INTERRUPTIBLE_RETURN_INT(_cmd, _clear) do { \
 190   int _result; \
 191   do { \
 192     INTERRUPTIBLE(_cmd, _result, _clear); \
 193   } while((_result == OS_ERR) && (errno == EINTR)); \
 194   return _result; \
 195 } while(false)
 196 
 197 #define INTERRUPTIBLE_RETURN_INT_VM(_cmd, _clear) do { \
 198   int _result; \
 199   do { \
 200     INTERRUPTIBLE_VM(_cmd, _result, _clear); \
 201   } while((_result == OS_ERR) && (errno == EINTR)); \
 202   return _result; \
 203 } while(false)
 204 
 205 #define INTERRUPTIBLE_RETURN_INT_NORESTART(_cmd, _clear) do { \
 206   int _result; \
 207   INTERRUPTIBLE_NORESTART(_cmd, _result, _clear); \
 208   return _result; \
 209 } while(false)
 210 
 211 /* Use the RESTARTABLE macros when interruptible io is not needed */
 212 
 213 #define RESTARTABLE(_cmd, _result) do { \
 214   do { \
 215     _result = _cmd; \
 216   } while((_result == OS_ERR) && (errno == EINTR)); \
 217 } while(false)
 218 
 219 #define RESTARTABLE_RETURN_INT(_cmd) do { \
 220   int _result; \
 221   RESTARTABLE(_cmd, _result); \
 222   return _result; \
 223 } while(false)
 224 
 225 inline bool os::numa_has_static_binding()   { return false; }
 226 inline bool os::numa_has_group_homing()     { return true;  }
 227 
 228 inline int    os::socket(int domain, int type, int protocol) {
 229   return ::socket(domain, type, protocol);
 230 }
 231 
 232 inline int    os::listen(int fd, int count) {
 233   if (fd < 0) return OS_ERR;
 234 
 235   return ::listen(fd, count);
 236 }
 237 
 238 inline int os::socket_shutdown(int fd, int howto){
 239   return ::shutdown(fd, howto);
 240 }
 241 
 242 inline int os::get_sock_name(int fd, struct sockaddr* him, socklen_t* len){
 243   return ::getsockname(fd, him, len);
 244 }
 245 
 246 inline int os::get_host_name(char* name, int namelen){
 247   return ::gethostname(name, namelen);
 248 }
 249 
 250 inline struct hostent* os::get_host_by_name(char* name) {
 251   return ::gethostbyname(name);
 252 }
 253 
 254 inline int os::get_sock_opt(int fd, int level, int optname,
 255                             char* optval, socklen_t* optlen) {
 256   return ::getsockopt(fd, level, optname, optval, optlen);
 257 }
 258 
 259 inline int os::set_sock_opt(int fd, int level, int optname,
 260                             const char *optval, socklen_t optlen) {
 261   return ::setsockopt(fd, level, optname, optval, optlen);
 262 }
 263 #endif // OS_SOLARIS_VM_OS_SOLARIS_INLINE_HPP