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 // TODO: Determine whether Sys V memory is split. If yes, we need to treat 64 // this the same way Windows treats its VirtualAlloc allocations. 65 } 66 67 // Bang the shadow pages if they need to be touched to be mapped. 68 inline void os::map_stack_shadow_pages() { 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 DIR* os::opendir(const char* dirname) { 78 assert(dirname != NULL, "just checking"); 79 return ::opendir(dirname); 80 } 81 82 inline int os::readdir_buf_size(const char *path) { 83 // According to aix sys/limits, NAME_MAX must be retrieved at runtime. 84 const long my_NAME_MAX = pathconf(path, _PC_NAME_MAX); 85 return my_NAME_MAX + sizeof(dirent) + 1; 86 } 87 88 inline jlong os::lseek(int fd, jlong offset, int whence) { 89 return (jlong) ::lseek64(fd, offset, whence); 90 } 91 92 inline int os::fsync(int fd) { 93 return ::fsync(fd); 94 } 95 96 inline char* os::native_path(char *path) { 97 return path; 98 } 99 100 inline int os::ftruncate(int fd, jlong length) { 101 return ::ftruncate64(fd, length); 102 } 103 104 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf) { 105 dirent* p = NULL; 106 assert(dirp != NULL, "just checking"); 107 108 // AIX: slightly different from POSIX. 109 // On AIX, readdir_r returns 0 or != 0 and error details in errno. 110 if (::readdir_r(dirp, dbuf, &p) != 0) { 111 return NULL; 112 } 113 return p; 114 } 115 116 inline int os::closedir(DIR *dirp) { 117 assert(dirp != NULL, "argument is NULL"); 118 return ::closedir(dirp); 119 } 120 121 // macros for restartable system calls 122 123 #define RESTARTABLE(_cmd, _result) do { \ 124 _result = _cmd; \ 125 } while(((int)_result == OS_ERR) && (errno == EINTR)) 126 127 #define RESTARTABLE_RETURN_INT(_cmd) do { \ 128 int _result; \ 129 RESTARTABLE(_cmd, _result); \ 130 return _result; \ 131 } while(false) 132 133 // We don't have NUMA support on Aix, but we need this for compilation. 134 inline bool os::numa_has_static_binding() { ShouldNotReachHere(); return true; } 135 inline bool os::numa_has_group_homing() { ShouldNotReachHere(); return false; } 136 137 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 138 size_t res; 139 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res); 140 return res; 141 } 142 143 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) { 144 size_t res; 145 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 146 return res; 147 } 148 149 inline int os::close(int fd) { 150 return ::close(fd); 151 } 152 153 inline int os::socket_close(int fd) { 154 return ::close(fd); 155 } 156 157 inline int os::socket(int domain, int type, int protocol) { 158 return ::socket(domain, type, protocol); 159 } 160 161 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 162 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags)); 163 } 164 165 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) { 166 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags)); 167 } 168 169 inline int os::raw_send(int fd, char *buf, size_t nBytes, uint flags) { 170 return os::send(fd, buf, nBytes, flags); 171 } 172 173 inline int os::connect(int fd, struct sockaddr *him, socklen_t len) { 174 RESTARTABLE_RETURN_INT(::connect(fd, him, len)); 175 } 176 177 inline struct hostent* os::get_host_by_name(char* name) { 178 return ::gethostbyname(name); 179 } 180 181 inline bool os::supports_monotonic_clock() { 182 // mread_real_time() is monotonic on AIX (see os::javaTimeNanos() comments) 183 return true; 184 } 185 186 inline void os::exit(int num) { 187 ::exit(num); 188 } 189 190 #endif // OS_AIX_VM_OS_AIX_INLINE_HPP