1 /*
   2  * Copyright (c) 1999, 2018, 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_BSD_VM_OS_BSD_INLINE_HPP
  26 #define OS_BSD_VM_OS_BSD_INLINE_HPP
  27 
  28 #include "runtime/os.hpp"
  29 
  30 // System includes
  31 
  32 #include <unistd.h>
  33 #include <sys/socket.h>
  34 #include <poll.h>
  35 #include <netdb.h>
  36 
  37 // File names are case-insensitive on windows only
  38 inline int os::file_name_strncmp(const char* s1, const char* s2, size_t num) {
  39   return strncmp(s1, s2, num);
  40 }
  41 
  42 inline bool os::obsolete_option(const JavaVMOption *option) {
  43   return false;
  44 }
  45 
  46 inline bool os::uses_stack_guard_pages() {
  47   return true;
  48 }
  49 
  50 inline bool os::must_commit_stack_guard_pages() {
  51   assert(uses_stack_guard_pages(), "sanity check");
  52 #if !defined(__FreeBSD__) || __FreeBSD__ < 5
  53   // Since FreeBSD 4 uses malloc() for allocating the thread stack
  54   // there is no need to do anything extra to allocate the guard pages
  55   return false;
  56 #else
  57   // FreeBSD 5+ uses mmap MAP_STACK for allocating the thread stacks.
  58   // Must 'allocate' them or guard pages are ignored.
  59   return true;
  60 #endif
  61 }
  62 
  63 
  64 // On Bsd, reservations are made on a page by page basis, nothing to do.
  65 inline void os::pd_split_reserved_memory(char *base, size_t size,
  66                                       size_t split, bool realloc) {
  67 }
  68 
  69 
  70 // Bang the shadow pages if they need to be touched to be mapped.
  71 inline void os::map_stack_shadow_pages(address sp) {
  72 }
  73 
  74 inline void os::dll_unload(void *lib) {
  75   ::dlclose(lib);
  76 }
  77 
  78 inline const int os::default_file_open_flags() { return 0;}
  79 
  80 inline DIR* os::opendir(const char* dirname)
  81 {
  82   assert(dirname != NULL, "just checking");
  83   return ::opendir(dirname);
  84 }
  85 
  86 inline int os::readdir_buf_size(const char *path)
  87 {
  88   return NAME_MAX + sizeof(dirent) + 1;
  89 }
  90 
  91 inline jlong os::lseek(int fd, jlong offset, int whence) {
  92   return (jlong) ::lseek(fd, offset, whence);
  93 }
  94 
  95 inline int os::fsync(int fd) {
  96   return ::fsync(fd);
  97 }
  98 




  99 inline int os::ftruncate(int fd, jlong length) {
 100   return ::ftruncate(fd, length);
 101 }
 102 
 103 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf)
 104 {
 105   dirent* p;
 106   int status;
 107   assert(dirp != NULL, "just checking");
 108 
 109   // NOTE: Bsd readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX
 110   // version. Here is the doc for this function:
 111   // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html
 112 
 113   if((status = ::readdir_r(dirp, dbuf, &p)) != 0) {
 114     errno = status;
 115     return NULL;
 116   } else
 117     return p;
 118 }
 119 
 120 inline int os::closedir(DIR *dirp) {
 121   assert(dirp != NULL, "argument is NULL");
 122   return ::closedir(dirp);
 123 }
 124 
 125 // macros for restartable system calls
 126 
 127 #define RESTARTABLE(_cmd, _result) do { \
 128     _result = _cmd; \
 129   } while(((int)_result == OS_ERR) && (errno == EINTR))
 130 
 131 #define RESTARTABLE_RETURN_INT(_cmd) do { \
 132   int _result; \
 133   RESTARTABLE(_cmd, _result); \
 134   return _result; \
 135 } while(false)
 136 
 137 inline bool os::numa_has_static_binding()   { return true; }
 138 inline bool os::numa_has_group_homing()     { return false;  }
 139 
 140 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
 141   size_t res;
 142   RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res);
 143   return res;
 144 }
 145 
 146 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
 147   size_t res;
 148   RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
 149   return res;
 150 }
 151 
 152 inline int os::close(int fd) {
 153   return ::close(fd);
 154 }
 155 
 156 inline int os::socket_close(int fd) {
 157   return ::close(fd);
 158 }
 159 
 160 inline int os::socket(int domain, int type, int protocol) {
 161   return ::socket(domain, type, protocol);
 162 }
 163 
 164 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
 165   RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags));
 166 }
 167 
 168 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) {
 169   RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
 170 }
 171 
 172 inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
 173   return os::send(fd, buf, nBytes, flags);
 174 }
 175 
 176 inline int os::connect(int fd, struct sockaddr* him, socklen_t len) {
 177   RESTARTABLE_RETURN_INT(::connect(fd, him, len));
 178 }
 179 
 180 inline struct hostent* os::get_host_by_name(char* name) {
 181   return ::gethostbyname(name);
 182 }
 183 
 184 inline bool os::supports_monotonic_clock() {
 185 #ifdef __APPLE__
 186   return true;
 187 #else
 188   return Bsd::_clock_gettime != NULL;
 189 #endif
 190 }
 191 
 192 inline void os::exit(int num) {
 193   ::exit(num);
 194 }
 195 
 196 #endif // OS_BSD_VM_OS_BSD_INLINE_HPP
--- EOF ---