1 /* src/vm/os.hpp - system (OS) functions
3 Copyright (C) 2007, 2008, 2009
4 CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
5 Copyright (C) 2008 Theobroma Systems Ltd.
7 This file is part of CACAO.
9 This program is free software; you can redistribute it and/or
10 modify it under the terms of the GNU General Public License as
11 published by the Free Software Foundation; either version 2, or (at
12 your option) any later version.
14 This program is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
32 // NOTE: In this file we check for all system headers, because we wrap
33 // all system calls into inline functions for better portability.
35 // Please don't include CACAO headers here as this header should be a
36 // very low-level one.
38 #if defined(HAVE_DIRENT_H)
42 #if defined(HAVE_DLFCN_H)
46 #if defined(HAVE_ERRNO_H)
50 #if defined(HAVE_EXECINFO_H)
51 # include <execinfo.h>
54 #if defined(HAVE_FCNTL_H)
58 #if defined(ENABLE_JRE_LAYOUT)
59 # if defined(HAVE_LIBGEN_H)
64 #if defined(HAVE_SIGNAL_H)
68 #if defined(HAVE_STDARG_H)
72 #if defined(HAVE_STDINT_H)
76 #if defined(HAVE_STDIO_H)
80 #if defined(HAVE_STDLIB_H)
84 #if defined(HAVE_STRING_H)
88 #if defined(HAVE_UNISTD_H)
92 #if defined(HAVE_SYS_MMAN_H)
93 # include <sys/mman.h>
96 #if defined(HAVE_SYS_SOCKET_H)
97 # include <sys/socket.h>
100 #if defined(HAVE_SYS_STAT_H)
101 # include <sys/stat.h>
104 #if defined(HAVE_SYS_TYPES_H)
105 # include <sys/types.h>
111 // Class wrapping system (OS) functions.
115 static inline void abort();
116 static inline int accept(int sockfd, struct sockaddr* addr, socklen_t* addrlen);
117 static inline int access(const char *pathname, int mode);
118 static inline int atoi(const char* nptr);
119 static inline int backtrace(void** array, int size);
120 static inline char** backtrace_symbols(void* const* array, int size) throw ();
121 static inline void* calloc(size_t nmemb, size_t size);
122 static inline int close(int fd);
123 static inline int connect(int sockfd, const struct sockaddr* serv_addr, socklen_t addrlen);
124 #if defined(ENABLE_JRE_LAYOUT)
125 static inline char* dirname(char* path);
127 static inline int dlclose(void* handle);
128 static inline char* dlerror(void);
129 static inline void* dlopen(const char* filename, int flag);
130 static inline void* dlsym(void* handle, const char* symbol);
131 static inline int fclose(FILE* fp);
132 static inline FILE* fopen(const char* path, const char* mode);
133 static inline int fprintf(FILE* stream, const char* format, ...);
134 static inline size_t fread(void* ptr, size_t size, size_t nmemb, FILE* stream);
135 static inline void free(void* ptr);
136 static inline char* getenv(const char* name);
137 static inline int gethostname(char* name, size_t len);
138 static inline int getpagesize(void);
139 static inline int getsockname(int s, struct sockaddr* name, socklen_t* namelen);
140 static inline int getsockopt(int s, int level, int optname, void* optval, socklen_t* optlen);
141 static inline int listen(int sockfd, int backlog);
142 static inline void* malloc(size_t size);
143 static inline void* memcpy(void* dest, const void* src, size_t n);
144 static inline void* memset(void* s, int c, size_t n);
145 static inline int mprotect(void* addr, size_t len, int prot);
146 static inline ssize_t readlink(const char* path, char* buf, size_t bufsiz);
147 static inline int scandir(const char* dir, struct dirent*** namelist, int(*filter)(const struct dirent*), int(*compar)(const void*, const void*));
148 static inline ssize_t send(int s, const void* buf, size_t len, int flags);
149 static inline int setsockopt(int s, int level, int optname, const void* optval, socklen_t optlen);
150 static inline int shutdown(int s, int how);
151 static inline int socket(int domain, int type, int protocol);
152 static inline int stat(const char* path, struct stat* buf);
153 #if defined(__SOLARIS__)
154 static inline int str2sig(const char* str, int* signum);
156 static inline char* strcat(char* dest, const char* src);
157 static inline int strcmp(const char* s1, const char* s2);
158 static inline char* strcpy(char* dest, const char* src);
159 static inline char* strdup(const char* s);
160 static inline size_t strlen(const char* s);
161 static inline char* strerror(int errnum);
163 // Convenience functions.
164 static void abort(const char* text, ...);
165 static void abort_errnum(int errnum, const char* text, ...);
166 static void abort_errno(const char* text, ...);
167 static void* mmap_anonymous(void *addr, size_t len, int prot, int flags);
168 static void print_backtrace();
169 static int processors_online();
172 template<class F1, class F2>
173 static int call_scandir(int (*scandir)(const char *, struct dirent ***, F1, F2), const char *dir, struct dirent ***namelist, int(*filter)(const struct dirent *), int(*compar)(const void *, const void *));
177 inline void os::abort(void)
179 #if defined(HAVE_ABORT)
182 # error abort not available
186 inline int os::accept(int sockfd, struct sockaddr* addr, socklen_t* addrlen)
188 #if defined(HAVE_ACCEPT)
189 return ::accept(sockfd, addr, addrlen);
191 # error accept not available
195 inline int os::access(const char* pathname, int mode)
197 #if defined(HAVE_ACCESS)
198 return ::access(pathname, mode);
200 # error access not available
204 inline int os::atoi(const char* nptr)
206 #if defined(HAVE_ATOI)
209 # error atoi not available
213 inline int os::backtrace(void** array, int size)
215 #if defined(HAVE_BACKTRACE)
216 return ::backtrace(array, size);
218 fprintf(stderr, "os::backtrace: Not available.");
223 inline char** os::backtrace_symbols(void* const* array, int size) throw ()
225 #if defined(HAVE_BACKTRACE_SYMBOLS)
226 return ::backtrace_symbols(array, size);
228 fprintf(stderr, "os::backtrace_symbols: Not available.");
233 inline void* os::calloc(size_t nmemb, size_t size)
235 #if defined(HAVE_CALLOC)
236 return ::calloc(nmemb, size);
238 # error calloc not available
242 inline int os::close(int fd)
244 #if defined(HAVE_CLOSE)
247 # error close not available
251 inline int os::connect(int sockfd, const struct sockaddr* serv_addr, socklen_t addrlen)
253 #if defined(HAVE_CONNECT)
254 return ::connect(sockfd, serv_addr, addrlen);
256 # error connect not available
260 #if defined(ENABLE_JRE_LAYOUT)
261 inline char* os::dirname(char* path)
263 #if defined(HAVE_DIRNAME)
264 return ::dirname(path);
266 # error dirname not available
271 inline int os::dlclose(void* handle)
273 #if defined(HAVE_DLCLOSE)
274 return ::dlclose(handle);
276 # error dlclose not available
280 inline char* os::dlerror(void)
282 #if defined(HAVE_DLERROR)
283 // At least FreeBSD defines dlerror() to return a const char*, so
284 // we simply cast it.
285 return (char*) ::dlerror();
287 # error dlerror not available
291 inline void* os::dlopen(const char* filename, int flag)
293 #if defined(HAVE_DLOPEN)
294 return ::dlopen(filename, flag);
296 # error dlopen not available
300 inline void* os::dlsym(void* handle, const char* symbol)
302 #if defined(HAVE_DLSYM)
303 return ::dlsym(handle, symbol);
305 # error dlsym not available
309 inline int os::fclose(FILE* fp)
311 #if defined(HAVE_FCLOSE)
314 # error fclose not available
318 inline FILE* os::fopen(const char* path, const char* mode)
320 #if defined(HAVE_FOPEN)
321 return ::fopen(path, mode);
323 # error fopen not available
327 inline int os::fprintf(FILE* stream, const char* format, ...)
329 #if defined(HAVE_FPRINTF)
331 va_start(ap, format);
332 int result = ::vfprintf(stream, format, ap);
336 # error fprintf not available
340 inline size_t os::fread(void* ptr, size_t size, size_t nmemb, FILE* stream)
342 #if defined(HAVE_FREAD)
343 return ::fread(ptr, size, nmemb, stream);
345 # error fread not available
349 inline void os::free(void* ptr)
351 #if defined(HAVE_FREE)
354 # error free not available
358 inline static int system_fsync(int fd)
360 #if defined(HAVE_FSYNC)
363 # error fsync not available
367 inline static int system_ftruncate(int fd, off_t length)
369 #if defined(HAVE_FTRUNCATE)
370 return ftruncate(fd, length);
372 # error ftruncate not available
376 inline char* os::getenv(const char* name)
378 #if defined(HAVE_GETENV)
379 return ::getenv(name);
381 # error getenv not available
385 inline int os::gethostname(char* name, size_t len)
387 #if defined(HAVE_GETHOSTNAME)
388 return ::gethostname(name, len);
390 # error gethostname not available
394 inline int os::getpagesize(void)
396 #if defined(HAVE_GETPAGESIZE)
397 return ::getpagesize();
399 # error getpagesize not available
403 inline int os::getsockname(int s, struct sockaddr* name, socklen_t* namelen)
405 #if defined(HAVE_GETSOCKNAME)
406 return ::getsockname(s, name, namelen);
408 # error getsockname not available
412 inline int os::getsockopt(int s, int level, int optname, void* optval, socklen_t* optlen)
414 #if defined(HAVE_GETSOCKOPT)
415 return ::getsockopt(s, level, optname, optval, optlen);
417 # error getsockopt not available
421 inline int os::listen(int sockfd, int backlog)
423 #if defined(HAVE_LISTEN)
424 return ::listen(sockfd, backlog);
426 # error listen not available
430 inline static off_t system_lseek(int fildes, off_t offset, int whence)
432 #if defined(HAVE_LSEEK)
433 return lseek(fildes, offset, whence);
435 # error lseek not available
439 inline void* os::malloc(size_t size)
441 #if defined(HAVE_MALLOC)
442 return ::malloc(size);
444 # error malloc not available
448 inline void* os::memcpy(void* dest, const void* src, size_t n)
450 #if defined(HAVE_MEMCPY)
451 return ::memcpy(dest, src, n);
453 # error memcpy not available
457 inline void* os::memset(void* s, int c, size_t n)
459 #if defined(HAVE_MEMSET)
460 return ::memset(s, c, n);
462 # error memset not available
466 inline int os::mprotect(void* addr, size_t len, int prot)
468 #if defined(HAVE_MPROTECT)
469 return ::mprotect(addr, len, prot);
471 # error mprotect not available
475 inline static int system_open(const char *pathname, int flags, mode_t mode)
477 #if defined(HAVE_OPEN)
478 return open(pathname, flags, mode);
480 # error open not available
484 inline static ssize_t system_read(int fd, void *buf, size_t count)
486 #if defined(HAVE_READ)
487 return read(fd, buf, count);
489 # error read not available
493 inline ssize_t os::readlink(const char* path, char* buf, size_t bufsiz)
495 #if defined(HAVE_READLINK)
496 return ::readlink(path, buf, bufsiz);
498 # error readlink not available
502 inline static void *system_realloc(void *ptr, size_t size)
504 #if defined(HAVE_REALLOC)
505 return realloc(ptr, size);
507 # error realloc not available
511 template<class F1, class F2>
512 inline int os::call_scandir(int (*scandir)(const char *, struct dirent ***, F1, F2), const char *dir, struct dirent ***namelist, int(*filter)(const struct dirent *), int(*compar)(const void *, const void *))
514 return scandir(dir, namelist, (F1) filter, (F2) compar);
517 inline int os::scandir(const char *dir, struct dirent ***namelist, int(*filter)(const struct dirent *), int(*compar)(const void *, const void *))
519 #if defined(HAVE_SCANDIR)
520 return call_scandir(::scandir, dir, namelist, filter, compar);
522 # error scandir not available
526 inline ssize_t os::send(int s, const void* buf, size_t len, int flags)
528 // TODO Should be restartable on Linux and interruptible on Solaris.
529 #if defined(HAVE_SEND)
530 return ::send(s, buf, len, flags);
532 # error send not available
536 inline int os::setsockopt(int s, int level, int optname, const void* optval, socklen_t optlen)
538 #if defined(HAVE_SETSOCKOPT)
539 return ::setsockopt(s, level, optname, optval, optlen);
541 # error setsockopt not available
545 inline int os::shutdown(int s, int how)
547 #if defined(HAVE_SHUTDOWN)
548 return ::shutdown(s, how);
550 # error shutdown not available
554 inline int os::socket(int domain, int type, int protocol)
556 #if defined(HAVE_SOCKET)
557 return ::socket(domain, type, protocol);
559 # error socket not available
563 inline int os::stat(const char* path, struct stat* buf)
565 #if defined(HAVE_STAT)
566 return ::stat(path, buf);
568 # error stat not available
572 #if defined(__SOLARIS__)
573 inline int os::str2sig(const char* str, int* signum)
575 #if defined(HAVE_STR2SIG)
576 return ::str2sig(str, signum);
578 # error str2sig not available
583 inline char* os::strcat(char* dest, const char* src)
585 #if defined(HAVE_STRCAT)
586 return ::strcat(dest, src);
588 # error strcat not available
592 inline int os::strcmp(const char* s1, const char* s2)
594 #if defined(HAVE_STRCMP)
595 return ::strcmp(s1, s2);
597 # error strcmp not available
601 inline char* os::strcpy(char* dest, const char* src)
603 #if defined(HAVE_STRCPY)
604 return ::strcpy(dest, src);
606 # error strcpy not available
610 inline char* os::strdup(const char* s)
612 #if defined(HAVE_STRDUP)
615 # error strdup not available
619 inline char* os::strerror(int errnum)
621 #if defined(HAVE_STRERROR)
622 return ::strerror(errnum);
624 # error strerror not available
628 inline size_t os::strlen(const char* s)
630 #if defined(HAVE_STRLEN)
633 # error strlen not available
637 inline static ssize_t system_write(int fd, const void *buf, size_t count)
639 #if defined(HAVE_WRITE)
640 return write(fd, buf, count);
642 # error write not available
648 void* os_mmap_anonymous(void *addr, size_t len, int prot, int flags);
651 int os_access(const char* pathname, int mode);
652 int os_atoi(const char* nptr);
653 void* os_calloc(size_t nmemb, size_t size);
654 char* os_dirname(char* path);
655 char* os_dlerror(void);
656 void* os_dlsym(void* handle, const char* symbol);
657 int os_fclose(FILE* fp);
658 FILE* os_fopen(const char* path, const char* mode);
659 size_t os_fread(void* ptr, size_t size, size_t nmemb, FILE* stream);
660 void os_free(void* ptr);
661 int os_getpagesize(void);
662 void* os_memcpy(void* dest, const void* src, size_t n);
663 void* os_memset(void* s, int c, size_t n);
664 int os_mprotect(void* addr, size_t len, int prot);
665 int os_scandir(const char* dir, struct dirent*** namelist, int(*filter)(const struct dirent*), int(*compar)(const void*, const void*));
666 int os_stat(const char* path, struct stat* buf);
667 char* os_strcat(char* dest, const char* src);
668 char* os_strcpy(char* dest, const char* src);
669 char* os_strdup(const char* s);
670 int os_strlen(const char* s);
678 * These are local overrides for various environment variables in Emacs.
679 * Please do not remove this and leave it at the end of the file, where
680 * Emacs will automagically detect them.
681 * ---------------------------------------------------------------------
684 * indent-tabs-mode: t
688 * vim:noexpandtab:sw=4:ts=4: