1 /* 2 * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2012, 2015 SAP AG. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #ifndef OS_AIX_VM_OS_AIX_INLINE_HPP 27 #define OS_AIX_VM_OS_AIX_INLINE_HPP 28 29 #include "runtime/os.hpp" 30 31 // System includes 32 33 #include <unistd.h> 34 #include <sys/socket.h> 35 #include <sys/poll.h> 36 #include <sys/ioctl.h> 37 #include <netdb.h> 38 39 // File names are case-sensitive on windows only. 40 inline int os::file_name_strcmp(const char* s1, const char* s2) { 41 return strcmp(s1, s2); 42 } 43 44 inline bool os::obsolete_option(const JavaVMOption *option) { 45 return false; 46 } 47 48 inline bool os::uses_stack_guard_pages() { 49 return true; 50 } 51 52 // Whether or not calling code should/can commit/uncommit stack pages 53 // before guarding them. Answer for AIX is definitly no, because memory 54 // is automatically committed on touch. 55 inline bool os::allocate_stack_guard_pages() { 56 assert(uses_stack_guard_pages(), "sanity check"); 57 return false; 58 } 59 60 // On Aix, reservations are made on a page by page basis, nothing to do. 61 inline void os::pd_split_reserved_memory(char *base, size_t size, 62 size_t split, bool realloc) { 63 } 64 65 // Bang the shadow pages if they need to be touched to be mapped. 66 inline void os::bang_stack_shadow_pages() { 67 } 68 69 inline void os::dll_unload(void *lib) { 70 ::dlclose(lib); 71 } 72 73 inline const int os::default_file_open_flags() { return 0;} 74 75 inline DIR* os::opendir(const char* dirname) { 76 assert(dirname != NULL, "just checking"); 77 return ::opendir(dirname); 78 } 79 80 inline int os::readdir_buf_size(const char *path) { 81 // According to aix sys/limits, NAME_MAX must be retrieved at runtime. 82 const long my_NAME_MAX = pathconf(path, _PC_NAME_MAX); 83 return my_NAME_MAX + sizeof(dirent) + 1; 84 } 85 86 inline jlong os::lseek(int fd, jlong offset, int whence) { 87 return (jlong) ::lseek64(fd, offset, whence); 88 } 89 90 inline int os::fsync(int fd) { 91 return ::fsync(fd); 92 } 93 94 inline char* os::native_path(char *path) { 95 return path; 96 } 97 98 inline int os::ftruncate(int fd, jlong length) { 99 return ::ftruncate64(fd, length); 100 } 101 102 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf) { 103 dirent* p; 104 int status; 105 assert(dirp != NULL, "just checking"); 106 107 // NOTE: Linux readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX 108 // version. Here is the doc for this function: 109 // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html 110 111 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) { 112 errno = status; 113 return NULL; 114 } else 115 return p; 116 } 117 118 inline int os::closedir(DIR *dirp) { 119 assert(dirp != NULL, "argument is NULL"); 120 return ::closedir(dirp); 121 } 122 123 // macros for restartable system calls 124 125 #define RESTARTABLE(_cmd, _result) do { \ 126 _result = _cmd; \ 127 } while(((int)_result == OS_ERR) && (errno == EINTR)) 128 129 #define RESTARTABLE_RETURN_INT(_cmd) do { \ 130 int _result; \ 131 RESTARTABLE(_cmd, _result); \ 132 return _result; \ 133 } while(false) 134 135 // We don't have NUMA support on Aix, but we need this for compilation. 136 inline bool os::numa_has_static_binding() { ShouldNotReachHere(); return true; } 137 inline bool os::numa_has_group_homing() { ShouldNotReachHere(); return false; } 138 139 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 140 size_t res; 141 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res); 142 return res; 143 } 144 145 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) { 146 size_t res; 147 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 148 return res; 149 } 150 151 inline int os::close(int fd) { 152 return ::close(fd); 153 } 154 155 inline int os::socket_close(int fd) { 156 return ::close(fd); 157 } 158 159 inline int os::socket(int domain, int type, int protocol) { 160 return ::socket(domain, type, protocol); 161 } 162 163 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 164 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags)); 165 } 166 167 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) { 168 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags)); 169 } 170 171 inline int os::raw_send(int fd, char *buf, size_t nBytes, uint flags) { 172 return os::send(fd, buf, nBytes, flags); 173 } 174 175 inline int os::connect(int fd, struct sockaddr *him, socklen_t len) { 176 RESTARTABLE_RETURN_INT(::connect(fd, him, len)); 177 } 178 179 inline struct hostent* os::get_host_by_name(char* name) { 180 return ::gethostbyname(name); 181 } 182 183 inline bool os::supports_monotonic_clock() { 184 // mread_real_time() is monotonic on AIX (see os::javaTimeNanos() comments) 185 return true; 186 } 187 188 inline void os::exit(int num) { 189 ::exit(num); 190 } 191 192 #endif // OS_AIX_VM_OS_AIX_INLINE_HPP