rev 7960 : 8075506: aix: improve handling of native memory
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 inline void* os::thread_local_storage_at(int index) { 40 return pthread_getspecific((pthread_key_t)index); 41 } 42 43 // File names are case-sensitive on windows only 44 inline int os::file_name_strcmp(const char* s1, const char* s2) { 45 return strcmp(s1, s2); 46 } 47 48 inline bool os::obsolete_option(const JavaVMOption *option) { 49 return false; 50 } 51 52 inline bool os::uses_stack_guard_pages() { 53 return true; 54 } 55 56 // Whether or not calling code should/can commit/uncommit stack pages 57 // before guarding them. Answer for AIX is definitly no, because we 58 // operate on C heap. 59 inline bool os::allocate_stack_guard_pages() { 60 assert(uses_stack_guard_pages(), "sanity check"); 61 return false; 62 } 63 64 // On Aix, 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 // Bang the shadow pages if they need to be touched to be mapped. 70 inline void os::bang_stack_shadow_pages() { 71 } 72 73 inline void os::dll_unload(void *lib) { 74 ::dlclose(lib); 75 } 76 77 inline const int os::default_file_open_flags() { return 0;} 78 79 inline DIR* os::opendir(const char* dirname) 80 { 81 assert(dirname != NULL, "just checking"); 82 return ::opendir(dirname); 83 } 84 85 inline int os::readdir_buf_size(const char *path) 86 { 87 // according to aix sys/limits, NAME_MAX must be retrieved at runtime. */ 88 const long my_NAME_MAX = pathconf(path, _PC_NAME_MAX); 89 return my_NAME_MAX + sizeof(dirent) + 1; 90 } 91 92 inline jlong os::lseek(int fd, jlong offset, int whence) { 93 return (jlong) ::lseek64(fd, offset, whence); 94 } 95 96 inline int os::fsync(int fd) { 97 return ::fsync(fd); 98 } 99 100 inline char* os::native_path(char *path) { 101 return path; 102 } 103 104 inline int os::ftruncate(int fd, jlong length) { 105 return ::ftruncate64(fd, length); 106 } 107 108 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf) 109 { 110 dirent* p; 111 int status; 112 assert(dirp != NULL, "just checking"); 113 114 // NOTE: Linux readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX 115 // version. Here is the doc for this function: 116 // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html 117 118 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) { 119 errno = status; 120 return NULL; 121 } else 122 return p; 123 } 124 125 inline int os::closedir(DIR *dirp) { 126 assert(dirp != NULL, "argument is NULL"); 127 return ::closedir(dirp); 128 } 129 130 // macros for restartable system calls 131 132 #define RESTARTABLE(_cmd, _result) do { \ 133 _result = _cmd; \ 134 } while(((int)_result == OS_ERR) && (errno == EINTR)) 135 136 #define RESTARTABLE_RETURN_INT(_cmd) do { \ 137 int _result; \ 138 RESTARTABLE(_cmd, _result); \ 139 return _result; \ 140 } while(false) 141 142 // We don't have NUMA support on Aix, but we need this for compilation. 143 inline bool os::numa_has_static_binding() { ShouldNotReachHere(); return true; } 144 inline bool os::numa_has_group_homing() { ShouldNotReachHere(); return false; } 145 146 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 147 size_t res; 148 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res); 149 return res; 150 } 151 152 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) { 153 size_t res; 154 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 155 return res; 156 } 157 158 inline int os::close(int fd) { 159 return ::close(fd); 160 } 161 162 inline int os::socket_close(int fd) { 163 return ::close(fd); 164 } 165 166 inline int os::socket(int domain, int type, int protocol) { 167 return ::socket(domain, type, protocol); 168 } 169 170 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 171 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags)); 172 } 173 174 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) { 175 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags)); 176 } 177 178 inline int os::raw_send(int fd, char *buf, size_t nBytes, uint flags) { 179 return os::send(fd, buf, nBytes, flags); 180 } 181 182 inline int os::connect(int fd, struct sockaddr *him, socklen_t len) { 183 RESTARTABLE_RETURN_INT(::connect(fd, him, len)); 184 } 185 186 inline struct hostent* os::get_host_by_name(char* name) { 187 return ::gethostbyname(name); 188 } 189 190 inline bool os::supports_monotonic_clock() { 191 // mread_real_time() is monotonic on AIX (see os::javaTimeNanos() comments) 192 return true; 193 } 194 195 inline void os::exit(int num) { 196 ::exit(num); 197 } 198 199 #endif // OS_AIX_VM_OS_AIX_INLINE_HPP --- EOF ---