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_LOADAVG_H)
93 # include <sys/loadavg.h>
96 #if defined(HAVE_SYS_MMAN_H)
97 # include <sys/mman.h>
100 #if defined(HAVE_SYS_SOCKET_H)
101 # include <sys/socket.h>
104 #if defined(HAVE_SYS_STAT_H)
105 # include <sys/stat.h>
108 #if defined(HAVE_SYS_TYPES_H)
109 # include <sys/types.h>
115 // Class wrapping system (OS) functions.
119 static inline void abort();
120 static inline int accept(int sockfd, struct sockaddr* addr, socklen_t* addrlen);
121 static inline int access(const char *pathname, int mode);
122 static inline int atoi(const char* nptr);
123 static inline int backtrace(void** array, int size);
124 static inline char** backtrace_symbols(void* const* array, int size) throw ();
125 static inline void* calloc(size_t nmemb, size_t size);
126 static inline int close(int fd);
127 static inline int connect(int sockfd, const struct sockaddr* serv_addr, socklen_t addrlen);
128 #if defined(ENABLE_JRE_LAYOUT)
129 static inline char* dirname(char* path);
131 static inline int dlclose(void* handle);
132 static inline char* dlerror(void);
133 static inline void* dlopen(const char* filename, int flag);
134 static inline void* dlsym(void* handle, const char* symbol);
135 static inline int fclose(FILE* fp);
136 static inline FILE* fopen(const char* path, const char* mode);
137 static inline int fprintf(FILE* stream, const char* format, ...);
138 static inline size_t fread(void* ptr, size_t size, size_t nmemb, FILE* stream);
139 static inline void free(void* ptr);
140 static inline char* getenv(const char* name);
141 static inline int gethostname(char* name, size_t len);
142 static inline int getloadavg(double loadavg[], int nelem);
143 static inline int getpagesize(void);
144 static inline int getsockname(int s, struct sockaddr* name, socklen_t* namelen);
145 static inline int getsockopt(int s, int level, int optname, void* optval, socklen_t* optlen);
146 static inline int listen(int sockfd, int backlog);
147 static inline void* malloc(size_t size);
148 static inline void* memcpy(void* dest, const void* src, size_t n);
149 static inline void* memset(void* s, int c, size_t n);
150 static inline int mprotect(void* addr, size_t len, int prot);
151 static inline ssize_t readlink(const char* path, char* buf, size_t bufsiz);
152 static inline int scandir(const char* dir, struct dirent*** namelist, int(*filter)(const struct dirent*), int(*compar)(const void*, const void*));
153 static inline ssize_t send(int s, const void* buf, size_t len, int flags);
154 static inline int setsockopt(int s, int level, int optname, const void* optval, socklen_t optlen);
155 static inline int shutdown(int s, int how);
156 static inline int socket(int domain, int type, int protocol);
157 static inline int stat(const char* path, struct stat* buf);
158 #if defined(__SOLARIS__)
159 static inline int str2sig(const char* str, int* signum);
161 static inline char* strcat(char* dest, const char* src);
162 static inline int strcmp(const char* s1, const char* s2);
163 static inline char* strcpy(char* dest, const char* src);
164 static inline char* strdup(const char* s);
165 static inline size_t strlen(const char* s);
166 static inline char* strerror(int errnum);
168 // Convenience functions.
169 static void abort(const char* text, ...);
170 static void abort_errnum(int errnum, const char* text, ...);
171 static void abort_errno(const char* text, ...);
172 static void* mmap_anonymous(void *addr, size_t len, int prot, int flags);
173 static void print_backtrace();
174 static int processors_online();
177 template<class F1, class F2>
178 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 *));
182 inline void os::abort(void)
184 #if defined(HAVE_ABORT)
187 # error abort not available
191 inline int os::accept(int sockfd, struct sockaddr* addr, socklen_t* addrlen)
193 #if defined(HAVE_ACCEPT)
194 return ::accept(sockfd, addr, addrlen);
196 # error accept not available
200 inline int os::access(const char* pathname, int mode)
202 #if defined(HAVE_ACCESS)
203 return ::access(pathname, mode);
205 # error access not available
209 inline int os::atoi(const char* nptr)
211 #if defined(HAVE_ATOI)
214 # error atoi not available
218 inline int os::backtrace(void** array, int size)
220 #if defined(HAVE_BACKTRACE)
221 return ::backtrace(array, size);
223 fprintf(stderr, "os::backtrace: Not available.");
228 inline char** os::backtrace_symbols(void* const* array, int size) throw ()
230 #if defined(HAVE_BACKTRACE_SYMBOLS)
231 return ::backtrace_symbols(array, size);
233 fprintf(stderr, "os::backtrace_symbols: Not available.");
238 inline void* os::calloc(size_t nmemb, size_t size)
240 #if defined(HAVE_CALLOC)
241 return ::calloc(nmemb, size);
243 # error calloc not available
247 inline int os::close(int fd)
249 #if defined(HAVE_CLOSE)
252 # error close not available
256 inline int os::connect(int sockfd, const struct sockaddr* serv_addr, socklen_t addrlen)
258 #if defined(HAVE_CONNECT)
259 return ::connect(sockfd, serv_addr, addrlen);
261 # error connect not available
265 #if defined(ENABLE_JRE_LAYOUT)
266 inline char* os::dirname(char* path)
268 #if defined(HAVE_DIRNAME)
269 return ::dirname(path);
271 # error dirname not available
276 inline int os::dlclose(void* handle)
278 #if defined(HAVE_DLCLOSE)
279 return ::dlclose(handle);
281 # error dlclose not available
285 inline char* os::dlerror(void)
287 #if defined(HAVE_DLERROR)
288 // At least FreeBSD defines dlerror() to return a const char*, so
289 // we simply cast it.
290 return (char*) ::dlerror();
292 # error dlerror not available
296 inline void* os::dlopen(const char* filename, int flag)
298 #if defined(HAVE_DLOPEN)
299 return ::dlopen(filename, flag);
301 # error dlopen not available
305 inline void* os::dlsym(void* handle, const char* symbol)
307 #if defined(HAVE_DLSYM)
308 return ::dlsym(handle, symbol);
310 # error dlsym not available
314 inline int os::fclose(FILE* fp)
316 #if defined(HAVE_FCLOSE)
319 # error fclose not available
323 inline FILE* os::fopen(const char* path, const char* mode)
325 #if defined(HAVE_FOPEN)
326 return ::fopen(path, mode);
328 # error fopen not available
332 inline int os::fprintf(FILE* stream, const char* format, ...)
334 #if defined(HAVE_FPRINTF)
336 va_start(ap, format);
337 int result = ::vfprintf(stream, format, ap);
341 # error fprintf not available
345 inline size_t os::fread(void* ptr, size_t size, size_t nmemb, FILE* stream)
347 #if defined(HAVE_FREAD)
348 return ::fread(ptr, size, nmemb, stream);
350 # error fread not available
354 inline void os::free(void* ptr)
356 #if defined(HAVE_FREE)
359 # error free not available
363 inline static int system_fsync(int fd)
365 #if defined(HAVE_FSYNC)
368 # error fsync not available
372 inline static int system_ftruncate(int fd, off_t length)
374 #if defined(HAVE_FTRUNCATE)
375 return ftruncate(fd, length);
377 # error ftruncate not available
381 inline char* os::getenv(const char* name)
383 #if defined(HAVE_GETENV)
384 return ::getenv(name);
386 # error getenv not available
390 inline int os::gethostname(char* name, size_t len)
392 #if defined(HAVE_GETHOSTNAME)
393 return ::gethostname(name, len);
395 # error gethostname not available
399 inline int os::getloadavg(double loadavg[], int nelem)
401 #if defined(HAVE_GETLOADAVG)
402 return ::getloadavg(loadavg, nelem);
404 # error getloadavg not available
408 inline int os::getpagesize(void)
410 #if defined(HAVE_GETPAGESIZE)
411 return ::getpagesize();
413 # error getpagesize not available
417 inline int os::getsockname(int s, struct sockaddr* name, socklen_t* namelen)
419 #if defined(HAVE_GETSOCKNAME)
420 return ::getsockname(s, name, namelen);
422 # error getsockname not available
426 inline int os::getsockopt(int s, int level, int optname, void* optval, socklen_t* optlen)
428 #if defined(HAVE_GETSOCKOPT)
429 return ::getsockopt(s, level, optname, optval, optlen);
431 # error getsockopt not available
435 inline int os::listen(int sockfd, int backlog)
437 #if defined(HAVE_LISTEN)
438 return ::listen(sockfd, backlog);
440 # error listen not available
444 inline static off_t system_lseek(int fildes, off_t offset, int whence)
446 #if defined(HAVE_LSEEK)
447 return lseek(fildes, offset, whence);
449 # error lseek not available
453 inline void* os::malloc(size_t size)
455 #if defined(HAVE_MALLOC)
456 return ::malloc(size);
458 # error malloc not available
462 inline void* os::memcpy(void* dest, const void* src, size_t n)
464 #if defined(HAVE_MEMCPY)
465 return ::memcpy(dest, src, n);
467 # error memcpy not available
471 inline void* os::memset(void* s, int c, size_t n)
473 #if defined(HAVE_MEMSET)
474 return ::memset(s, c, n);
476 # error memset not available
480 inline int os::mprotect(void* addr, size_t len, int prot)
482 #if defined(HAVE_MPROTECT)
483 return ::mprotect(addr, len, prot);
485 # error mprotect not available
489 inline static int system_open(const char *pathname, int flags, mode_t mode)
491 #if defined(HAVE_OPEN)
492 return open(pathname, flags, mode);
494 # error open not available
498 inline static ssize_t system_read(int fd, void *buf, size_t count)
500 #if defined(HAVE_READ)
501 return read(fd, buf, count);
503 # error read not available
507 inline ssize_t os::readlink(const char* path, char* buf, size_t bufsiz)
509 #if defined(HAVE_READLINK)
510 return ::readlink(path, buf, bufsiz);
512 # error readlink not available
516 inline static void *system_realloc(void *ptr, size_t size)
518 #if defined(HAVE_REALLOC)
519 return realloc(ptr, size);
521 # error realloc not available
525 template<class F1, class F2>
526 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 *))
528 return scandir(dir, namelist, (F1) filter, (F2) compar);
531 inline int os::scandir(const char *dir, struct dirent ***namelist, int(*filter)(const struct dirent *), int(*compar)(const void *, const void *))
533 #if defined(HAVE_SCANDIR)
534 return call_scandir(::scandir, dir, namelist, filter, compar);
536 # error scandir not available
540 inline ssize_t os::send(int s, const void* buf, size_t len, int flags)
542 // TODO Should be restartable on Linux and interruptible on Solaris.
543 #if defined(HAVE_SEND)
544 return ::send(s, buf, len, flags);
546 # error send not available
550 inline int os::setsockopt(int s, int level, int optname, const void* optval, socklen_t optlen)
552 #if defined(HAVE_SETSOCKOPT)
553 return ::setsockopt(s, level, optname, optval, optlen);
555 # error setsockopt not available
559 inline int os::shutdown(int s, int how)
561 #if defined(HAVE_SHUTDOWN)
562 return ::shutdown(s, how);
564 # error shutdown not available
568 inline int os::socket(int domain, int type, int protocol)
570 #if defined(HAVE_SOCKET)
571 return ::socket(domain, type, protocol);
573 # error socket not available
577 inline int os::stat(const char* path, struct stat* buf)
579 #if defined(HAVE_STAT)
580 return ::stat(path, buf);
582 # error stat not available
586 #if defined(__SOLARIS__)
587 inline int os::str2sig(const char* str, int* signum)
589 #if defined(HAVE_STR2SIG)
590 return ::str2sig(str, signum);
592 # error str2sig not available
597 inline char* os::strcat(char* dest, const char* src)
599 #if defined(HAVE_STRCAT)
600 return ::strcat(dest, src);
602 # error strcat not available
606 inline int os::strcmp(const char* s1, const char* s2)
608 #if defined(HAVE_STRCMP)
609 return ::strcmp(s1, s2);
611 # error strcmp not available
615 inline char* os::strcpy(char* dest, const char* src)
617 #if defined(HAVE_STRCPY)
618 return ::strcpy(dest, src);
620 # error strcpy not available
624 inline char* os::strdup(const char* s)
626 #if defined(HAVE_STRDUP)
629 # error strdup not available
633 inline char* os::strerror(int errnum)
635 #if defined(HAVE_STRERROR)
636 return ::strerror(errnum);
638 # error strerror not available
642 inline size_t os::strlen(const char* s)
644 #if defined(HAVE_STRLEN)
647 # error strlen not available
651 inline static ssize_t system_write(int fd, const void *buf, size_t count)
653 #if defined(HAVE_WRITE)
654 return write(fd, buf, count);
656 # error write not available
662 void* os_mmap_anonymous(void *addr, size_t len, int prot, int flags);
665 int os_access(const char* pathname, int mode);
666 int os_atoi(const char* nptr);
667 void* os_calloc(size_t nmemb, size_t size);
668 char* os_dirname(char* path);
669 char* os_dlerror(void);
670 void* os_dlsym(void* handle, const char* symbol);
671 int os_fclose(FILE* fp);
672 FILE* os_fopen(const char* path, const char* mode);
673 size_t os_fread(void* ptr, size_t size, size_t nmemb, FILE* stream);
674 void os_free(void* ptr);
675 int os_getpagesize(void);
676 void* os_memcpy(void* dest, const void* src, size_t n);
677 void* os_memset(void* s, int c, size_t n);
678 int os_mprotect(void* addr, size_t len, int prot);
679 int os_scandir(const char* dir, struct dirent*** namelist, int(*filter)(const struct dirent*), int(*compar)(const void*, const void*));
680 int os_stat(const char* path, struct stat* buf);
681 char* os_strcat(char* dest, const char* src);
682 char* os_strcpy(char* dest, const char* src);
683 char* os_strdup(const char* s);
684 int os_strlen(const char* s);
692 * These are local overrides for various environment variables in Emacs.
693 * Please do not remove this and leave it at the end of the file, where
694 * Emacs will automagically detect them.
695 * ---------------------------------------------------------------------
698 * indent-tabs-mode: t
702 * vim:noexpandtab:sw=4:ts=4: