1 /* 2 * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012, 2018 SAP SE. 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 <poll.h> 36 #include <sys/ioctl.h> 37 #include <netdb.h> 38 39 // File names are case-insensitive on windows only. 40 inline int os::file_name_strncmp(const char* s1, const char* s2, size_t num) { 41 return strncmp(s1, s2, num); 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::must_commit_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(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) ::lseek64(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 ::ftruncate64(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 // We don't have NUMA support on Aix, but we need this for compilation. 102 inline bool os::numa_has_static_binding() { ShouldNotReachHere(); return true; } 103 inline bool os::numa_has_group_homing() { ShouldNotReachHere(); return false; } 104 105 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 106 size_t res; 107 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res); 108 return res; 109 } 110 111 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) { 112 size_t res; 113 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 114 return res; 115 } 116 117 inline int os::close(int fd) { 118 return ::close(fd); 119 } 120 121 inline int os::socket_close(int fd) { 122 return ::close(fd); 123 } 124 125 inline int os::socket(int domain, int type, int protocol) { 126 return ::socket(domain, type, protocol); 127 } 128 129 inline int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 130 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, flags)); 131 } 132 133 inline int os::send(int fd, char* buf, size_t nBytes, uint flags) { 134 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags)); 135 } 136 137 inline int os::raw_send(int fd, char *buf, size_t nBytes, uint flags) { 138 return os::send(fd, buf, nBytes, flags); 139 } 140 141 inline int os::connect(int fd, struct sockaddr *him, socklen_t len) { 142 RESTARTABLE_RETURN_INT(::connect(fd, him, len)); 143 } 144 145 inline struct hostent* os::get_host_by_name(char* name) { 146 return ::gethostbyname(name); 147 } 148 149 inline bool os::supports_monotonic_clock() { 150 // mread_real_time() is monotonic on AIX (see os::javaTimeNanos() comments) 151 return true; 152 } 153 154 inline void os::exit(int num) { 155 ::exit(num); 156 } 157 158 #endif // OS_AIX_VM_OS_AIX_INLINE_HPP