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 char* os::native_path(char *path) {
 100   return path;
 101 }
 102 
 103 inline int os::ftruncate(int fd, jlong length) {
 104   return ::ftruncate(fd, length);
 105 }
 106 
 107 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf)
 108 {
 109   dirent* p;
 110   int status;
 111   assert(dirp != NULL, "just checking");
 112 
 113   // NOTE: Bsd readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX
 114   // version. Here is the doc for this function:
 115   // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html
 116 
 117   if((status = ::readdir_r(dirp, dbuf, &p)) != 0) {
 118     errno = status;
 119     return NULL;
 120   } else
 121     return p;
 122 }
 123 
 124 inline int os::closedir(DIR *dirp) {
 125   assert(dirp != NULL, "argument is NULL");
 126   return ::closedir(dirp);
 127 }
 128 
 129 // macros for restartable system calls
 130 
 131 #define RESTARTABLE(_cmd, _result) do { \
 132     _result = _cmd; \
 133   } while(((int)_result == OS_ERR) && (errno == EINTR))
 134 
 135 #define RESTARTABLE_RETURN_INT(_cmd) do { \
 136   int _result; \
 137   RESTARTABLE(_cmd, _result); \
 138   return _result; \
 139 } while(false)
 140 
 141 inline bool os::numa_has_static_binding()   { return true; }
 142 inline bool os::numa_has_group_homing()     { return false;  }
 143 
 144 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
 145   size_t res;
 146   RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res);
 147   return res;
 148 }
 149 
 150 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
 151   size_t res;
 152   RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
 153   return res;
 154 }
 155 
 156 inline int os::close(int fd) {
 157   return ::close(fd);
 158 }
 159 
 160 inline int os::socket_close(int fd) {
 161   return ::close(fd);
 162 }
 163 
 164 inline int os::socket(int domain, int type, int protocol) {
 165   return ::socket(domain, type, protocol);
 166 }
 167 
 168 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
 169   RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags));
 170 }
 171 
 172 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) {
 173   RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
 174 }
 175 
 176 inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
 177   return os::send(fd, buf, nBytes, flags);
 178 }
 179 
 180 inline int os::connect(int fd, struct sockaddr* him, socklen_t len) {
 181   RESTARTABLE_RETURN_INT(::connect(fd, him, len));
 182 }
 183 
 184 inline struct hostent* os::get_host_by_name(char* name) {
 185   return ::gethostbyname(name);
 186 }
 187 
 188 inline bool os::supports_monotonic_clock() {
 189 #ifdef __APPLE__
 190   return true;
 191 #else
 192   return Bsd::_clock_gettime != NULL;
 193 #endif
 194 }
 195 
 196 inline void os::exit(int num) {
 197   ::exit(num);
 198 }
 199 
 200 #endif // OS_BSD_VM_OS_BSD_INLINE_HPP
--- EOF ---