1 /*
   2  * Copyright (c) 1999, 2019, 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_OS_BSD_INLINE_HPP
  26 #define OS_BSD_OS_BSD_INLINE_HPP
  27 
  28 #include "runtime/os.hpp"
  29 #include "os_posix.inline.hpp"
  30 
  31 // System includes
  32 
  33 #include <unistd.h>
  34 #include <sys/socket.h>
  35 #include <poll.h>
  36 #include <netdb.h>
  37 
  38 inline bool os::uses_stack_guard_pages() {
  39   return true;
  40 }
  41 
  42 inline bool os::must_commit_stack_guard_pages() {
  43   assert(uses_stack_guard_pages(), "sanity check");
  44 #if !defined(__FreeBSD__) || __FreeBSD__ < 5
  45   // Since FreeBSD 4 uses malloc() for allocating the thread stack
  46   // there is no need to do anything extra to allocate the guard pages
  47   return false;
  48 #else
  49   // FreeBSD 5+ uses mmap MAP_STACK for allocating the thread stacks.
  50   // Must 'allocate' them or guard pages are ignored.
  51   return true;
  52 #endif
  53 }
  54 
  55 
  56 // On Bsd, reservations are made on a page by page basis, nothing to do.
  57 inline void os::pd_split_reserved_memory(char *base, size_t size,
  58                                       size_t split, bool realloc) {
  59 }
  60 
  61 
  62 // Bang the shadow pages if they need to be touched to be mapped.
  63 inline void os::map_stack_shadow_pages(address sp) {
  64 }
  65 
  66 inline void os::dll_unload(void *lib) {
  67   ::dlclose(lib);
  68 }
  69 
  70 inline const int os::default_file_open_flags() { return 0;}
  71 
  72 inline jlong os::lseek(int fd, jlong offset, int whence) {
  73   return (jlong) ::lseek(fd, offset, whence);
  74 }
  75 
  76 inline int os::fsync(int fd) {
  77   return ::fsync(fd);
  78 }
  79 
  80 inline int os::ftruncate(int fd, jlong length) {
  81   return ::ftruncate(fd, length);
  82 }
  83 
  84 // macros for restartable system calls
  85 
  86 #define RESTARTABLE(_cmd, _result) do { \
  87     _result = _cmd; \
  88   } while(((int)_result == OS_ERR) && (errno == EINTR))
  89 
  90 #define RESTARTABLE_RETURN_INT(_cmd) do { \
  91   int _result; \
  92   RESTARTABLE(_cmd, _result); \
  93   return _result; \
  94 } while(false)
  95 
  96 inline bool os::numa_has_static_binding()   { return true; }
  97 inline bool os::numa_has_group_homing()     { return false;  }
  98 
  99 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
 100   size_t res;
 101   RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
 102   return res;
 103 }
 104 
 105 inline int os::close(int fd) {
 106   return ::close(fd);
 107 }
 108 
 109 inline int os::socket_close(int fd) {
 110   return ::close(fd);
 111 }
 112 
 113 inline int os::socket(int domain, int type, int protocol) {
 114   return ::socket(domain, type, protocol);
 115 }
 116 
 117 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
 118   RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags));
 119 }
 120 
 121 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) {
 122   RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
 123 }
 124 
 125 inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
 126   return os::send(fd, buf, nBytes, flags);
 127 }
 128 
 129 inline int os::connect(int fd, struct sockaddr* him, socklen_t len) {
 130   RESTARTABLE_RETURN_INT(::connect(fd, him, len));
 131 }
 132 
 133 inline struct hostent* os::get_host_by_name(char* name) {
 134   return ::gethostbyname(name);
 135 }
 136 
 137 inline bool os::supports_monotonic_clock() {
 138 #ifdef __APPLE__
 139   return true;
 140 #else
 141   return Bsd::_clock_gettime != NULL;
 142 #endif
 143 }
 144 
 145 inline void os::exit(int num) {
 146   ::exit(num);
 147 }
 148 
 149 #endif // OS_BSD_OS_BSD_INLINE_HPP