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 // File names are case-insensitive on windows only
  39 inline int os::file_name_strncmp(const char* s1, const char* s2, size_t num) {
  40   return strncmp(s1, s2, num);
  41 }
  42 
  43 inline bool os::uses_stack_guard_pages() {
  44   return true;
  45 }
  46 
  47 inline bool os::must_commit_stack_guard_pages() {
  48   assert(uses_stack_guard_pages(), "sanity check");
  49 #if !defined(__FreeBSD__) || __FreeBSD__ < 5
  50   // Since FreeBSD 4 uses malloc() for allocating the thread stack
  51   // there is no need to do anything extra to allocate the guard pages
  52   return false;
  53 #else
  54   // FreeBSD 5+ uses mmap MAP_STACK for allocating the thread stacks.
  55   // Must 'allocate' them or guard pages are ignored.
  56   return true;
  57 #endif
  58 }
  59 
  60 
  61 // On Bsd, reservations are made on a page by page basis, nothing to do.
  62 inline void os::pd_split_reserved_memory(char *base, size_t size,
  63                                       size_t split, bool realloc) {
  64 }
  65 
  66 
  67 // Bang the shadow pages if they need to be touched to be mapped.
  68 inline void os::map_stack_shadow_pages(address sp) {
  69 }
  70 
  71 inline void os::dll_unload(void *lib) {
  72   ::dlclose(lib);
  73 }
  74 
  75 inline const int os::default_file_open_flags() { return 0;}
  76 
  77 inline jlong os::lseek(int fd, jlong offset, int whence) {
  78   return (jlong) ::lseek(fd, offset, whence);
  79 }
  80 
  81 inline int os::fsync(int fd) {
  82   return ::fsync(fd);
  83 }
  84 
  85 inline int os::ftruncate(int fd, jlong length) {
  86   return ::ftruncate(fd, length);
  87 }
  88 
  89 // macros for restartable system calls
  90 
  91 #define RESTARTABLE(_cmd, _result) do { \
  92     _result = _cmd; \
  93   } while(((int)_result == OS_ERR) && (errno == EINTR))
  94 
  95 #define RESTARTABLE_RETURN_INT(_cmd) do { \
  96   int _result; \
  97   RESTARTABLE(_cmd, _result); \
  98   return _result; \
  99 } while(false)
 100 
 101 inline bool os::numa_has_static_binding()   { return true; }
 102 inline bool os::numa_has_group_homing()     { return false;  }
 103 
 104 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
 105   size_t res;
 106   RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
 107   return res;
 108 }
 109 
 110 inline int os::close(int fd) {
 111   return ::close(fd);
 112 }
 113 
 114 inline int os::socket_close(int fd) {
 115   return ::close(fd);
 116 }
 117 
 118 inline int os::socket(int domain, int type, int protocol) {
 119   return ::socket(domain, type, protocol);
 120 }
 121 
 122 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) {
 123   RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags));
 124 }
 125 
 126 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) {
 127   RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags));
 128 }
 129 
 130 inline int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) {
 131   return os::send(fd, buf, nBytes, flags);
 132 }
 133 
 134 inline int os::connect(int fd, struct sockaddr* him, socklen_t len) {
 135   RESTARTABLE_RETURN_INT(::connect(fd, him, len));
 136 }
 137 
 138 inline struct hostent* os::get_host_by_name(char* name) {
 139   return ::gethostbyname(name);
 140 }
 141 
 142 inline bool os::supports_monotonic_clock() {
 143 #ifdef __APPLE__
 144   return true;
 145 #else
 146   return Bsd::_clock_gettime != NULL;
 147 #endif
 148 }
 149 
 150 inline void os::exit(int num) {
 151   ::exit(num);
 152 }
 153 
 154 #endif // OS_BSD_OS_BSD_INLINE_HPP