Wed, 01 Dec 2010 18:26:32 -0500
6348631: remove the use of the HPI library from Hotspot
Summary: move functions from hpi library to hotspot, communicate with licensees and open source community, check jdk for dependency, file CCC request
Reviewed-by: coleenp, acorn, dsamersoff
1 /*
2 * Copyright (c) 1999, 2010, 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 */
25 #ifndef OS_LINUX_VM_OS_LINUX_INLINE_HPP
26 #define OS_LINUX_VM_OS_LINUX_INLINE_HPP
28 #include "runtime/atomic.hpp"
29 #include "runtime/os.hpp"
30 #ifdef TARGET_OS_ARCH_linux_x86
31 # include "atomic_linux_x86.inline.hpp"
32 # include "orderAccess_linux_x86.inline.hpp"
33 #endif
34 #ifdef TARGET_OS_ARCH_linux_sparc
35 # include "atomic_linux_sparc.inline.hpp"
36 # include "orderAccess_linux_sparc.inline.hpp"
37 #endif
38 #ifdef TARGET_OS_ARCH_linux_zero
39 # include "atomic_linux_zero.inline.hpp"
40 # include "orderAccess_linux_zero.inline.hpp"
41 #endif
43 // System includes
45 #include <unistd.h>
46 #include <sys/socket.h>
47 #include <sys/poll.h>
48 #include <sys/ioctl.h>
49 #include <netdb.h>
51 inline void* os::thread_local_storage_at(int index) {
52 return pthread_getspecific((pthread_key_t)index);
53 }
55 inline const char* os::file_separator() {
56 return "/";
57 }
59 inline const char* os::line_separator() {
60 return "\n";
61 }
63 inline const char* os::path_separator() {
64 return ":";
65 }
67 inline const char* os::jlong_format_specifier() {
68 return "%lld";
69 }
71 inline const char* os::julong_format_specifier() {
72 return "%llu";
73 }
75 // File names are case-sensitive on windows only
76 inline int os::file_name_strcmp(const char* s1, const char* s2) {
77 return strcmp(s1, s2);
78 }
80 inline bool os::obsolete_option(const JavaVMOption *option) {
81 return false;
82 }
84 inline bool os::uses_stack_guard_pages() {
85 return true;
86 }
88 inline bool os::allocate_stack_guard_pages() {
89 assert(uses_stack_guard_pages(), "sanity check");
90 return true;
91 }
94 // On Linux, reservations are made on a page by page basis, nothing to do.
95 inline void os::split_reserved_memory(char *base, size_t size,
96 size_t split, bool realloc) {
97 }
100 // Bang the shadow pages if they need to be touched to be mapped.
101 inline void os::bang_stack_shadow_pages() {
102 }
104 inline void os::dll_unload(void *lib) {
105 ::dlclose(lib);
106 }
108 inline const int os::default_file_open_flags() { return 0;}
110 inline DIR* os::opendir(const char* dirname)
111 {
112 assert(dirname != NULL, "just checking");
113 return ::opendir(dirname);
114 }
116 inline int os::readdir_buf_size(const char *path)
117 {
118 return NAME_MAX + sizeof(dirent) + 1;
119 }
121 inline jlong os::lseek(int fd, jlong offset, int whence) {
122 return (jlong) ::lseek64(fd, offset, whence);
123 }
125 inline int os::fsync(int fd) {
126 return ::fsync(fd);
127 }
129 inline char* os::native_path(char *path) {
130 return path;
131 }
133 inline int os::ftruncate(int fd, jlong length) {
134 return ::ftruncate64(fd, length);
135 }
137 inline struct dirent* os::readdir(DIR* dirp, dirent *dbuf)
138 {
139 dirent* p;
140 int status;
141 assert(dirp != NULL, "just checking");
143 // NOTE: Linux readdir_r (on RH 6.2 and 7.2 at least) is NOT like the POSIX
144 // version. Here is the doc for this function:
145 // http://www.gnu.org/manual/glibc-2.2.3/html_node/libc_262.html
147 if((status = ::readdir_r(dirp, dbuf, &p)) != 0) {
148 errno = status;
149 return NULL;
150 } else
151 return p;
152 }
154 inline int os::closedir(DIR *dirp) {
155 assert(dirp != NULL, "argument is NULL");
156 return ::closedir(dirp);
157 }
159 // macros for restartable system calls
161 #define RESTARTABLE(_cmd, _result) do { \
162 _result = _cmd; \
163 } while(((int)_result == OS_ERR) && (errno == EINTR))
165 #define RESTARTABLE_RETURN_INT(_cmd) do { \
166 int _result; \
167 RESTARTABLE(_cmd, _result); \
168 return _result; \
169 } while(false)
171 inline bool os::numa_has_static_binding() { return true; }
172 inline bool os::numa_has_group_homing() { return false; }
174 inline size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) {
175 size_t res;
176 RESTARTABLE( (size_t) ::read(fd, buf, (size_t) nBytes), res);
177 return res;
178 }
180 inline size_t os::write(int fd, const void *buf, unsigned int nBytes) {
181 size_t res;
182 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res);
183 return res;
184 }
186 inline int os::close(int fd) {
187 return ::close(fd);
188 }
190 inline int os::socket_close(int fd) {
191 return ::close(fd);
192 }
194 inline int os::socket(int domain, int type, int protocol) {
195 return ::socket(domain, type, protocol);
196 }
198 inline int os::recv(int fd, char *buf, int nBytes, int flags) {
199 RESTARTABLE_RETURN_INT(::recv(fd, buf, nBytes, (unsigned int) flags));
200 }
202 inline int os::send(int fd, char *buf, int nBytes, int flags) {
203 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, (unsigned int) flags));
204 }
206 inline int os::raw_send(int fd, char *buf, int nBytes, int flags) {
207 return os::send(fd, buf, nBytes, flags);
208 }
210 inline int os::timeout(int fd, long timeout) {
211 julong prevtime,newtime;
212 struct timeval t;
214 gettimeofday(&t, NULL);
215 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
217 for(;;) {
218 struct pollfd pfd;
220 pfd.fd = fd;
221 pfd.events = POLLIN | POLLERR;
223 int res = ::poll(&pfd, 1, timeout);
225 if (res == OS_ERR && errno == EINTR) {
227 // On Linux any value < 0 means "forever"
229 if(timeout >= 0) {
230 gettimeofday(&t, NULL);
231 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000;
232 timeout -= newtime - prevtime;
233 if(timeout <= 0)
234 return OS_OK;
235 prevtime = newtime;
236 }
237 } else
238 return res;
239 }
240 }
242 inline int os::listen(int fd, int count) {
243 return ::listen(fd, count);
244 }
246 inline int os::connect(int fd, struct sockaddr *him, int len) {
247 RESTARTABLE_RETURN_INT(::connect(fd, him, len));
248 }
250 inline int os::accept(int fd, struct sockaddr *him, int *len) {
251 // This cast is from int to unsigned int on linux. Since we
252 // only pass the parameter "len" around the vm and don't try to
253 // fetch it's value, this cast is safe for now. The java.net group
254 // may need and want to change this interface someday if socklen_t goes
255 // to 64 bits on some platform that we support.
256 // Linux doc says this can't return EINTR, unlike accept() on Solaris
258 return ::accept(fd, him, (socklen_t *)len);
259 }
261 inline int os::recvfrom(int fd, char *buf, int nBytes, int flags,
262 sockaddr *from, int *fromlen) {
263 RESTARTABLE_RETURN_INT(::recvfrom(fd, buf, nBytes, (unsigned int) flags, from, (socklen_t *)fromlen));
264 }
266 inline int os::sendto(int fd, char *buf, int len, int flags,
267 struct sockaddr *to, int tolen) {
268 RESTARTABLE_RETURN_INT(::sendto(fd, buf, len, (unsigned int) flags, to, tolen));
269 }
271 inline int os::socket_available(int fd, jint *pbytes) {
272 // Linux doc says EINTR not returned, unlike Solaris
273 int ret = ::ioctl(fd, FIONREAD, pbytes);
275 //%% note ioctl can return 0 when successful, JVM_SocketAvailable
276 // is expected to return 0 on failure and 1 on success to the jdk.
277 return (ret < 0) ? 0 : 1;
278 }
281 inline int os::socket_shutdown(int fd, int howto){
282 return ::shutdown(fd, howto);
283 }
285 inline int os::bind(int fd, struct sockaddr *him, int len){
286 return ::bind(fd, him, len);
287 }
289 inline int os::get_sock_name(int fd, struct sockaddr *him, int *len){
290 return ::getsockname(fd, him, (socklen_t *)len);
291 }
293 inline int os::get_host_name(char* name, int namelen){
294 return ::gethostname(name, namelen);
295 }
297 inline struct hostent* os::get_host_by_name(char* name) {
298 return ::gethostbyname(name);
299 }
300 inline int os::get_sock_opt(int fd, int level, int optname,
301 char *optval, int* optlen){
302 return ::getsockopt(fd, level, optname, optval, (socklen_t *)optlen);
303 }
305 inline int os::set_sock_opt(int fd, int level, int optname,
306 const char *optval, int optlen){
307 return ::setsockopt(fd, level, optname, optval, optlen);
308 }
309 #endif // OS_LINUX_VM_OS_LINUX_INLINE_HPP