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/* |
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cpjit.C -- c portable jit in time compiler |
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Copyright (C) 2005 Marc Lehmann <cpjit@schmorp.de> |
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|
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This file is part of libcpjit. |
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|
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libcpjit is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with gvpe; if not, write to the Free Software |
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Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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|
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#include "config.h" |
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|
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#include "cpjit.h" |
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|
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#include <cassert> |
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#include <cstdlib> |
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#include <cstdarg> |
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#include <cstdio> |
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#include <cstring> |
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#include <cerrno> |
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|
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#include <sstream> |
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#include <fstream> |
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#include <stdexcept> |
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#include <iomanip> |
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|
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#include <unistd.h> |
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#include <fcntl.h> // for locking |
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|
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#include <sys/stat.h> |
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#include <sys/types.h> |
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#include <dirent.h> |
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|
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#include "md5.h" |
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|
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#include <dlfcn.h> |
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|
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#define STR_(str) #str |
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#define STR(str) STR_(str) |
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|
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namespace cpjit |
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{ |
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|
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const char typestr<U8 >::str[] = "unsigned " STR(TYPE_INT8); |
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const char typestr<U16 >::str[] = "unsigned " STR(TYPE_INT16); |
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const char typestr<U32 >::str[] = "unsigned " STR(TYPE_INT32); |
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const char typestr<U64 >::str[] = "unsigned " STR(TYPE_INT64); |
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const char typestr<I8 >::str[] = "signed " STR(TYPE_INT8); |
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const char typestr<I16 >::str[] = STR(TYPE_INT16); |
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const char typestr<I32 >::str[] = STR(TYPE_INT32); |
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const char typestr<I64 >::str[] = STR(TYPE_INT64); |
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const char typestr<FLT >::str[] = "float"; |
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const char typestr<DBL >::str[] = "double"; |
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|
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const char typestr<PTR >::str[] = "void" " *"; |
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|
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const char typestr<U8 *>::str[] = "unsigned " STR(TYPE_INT8) " *"; |
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const char typestr<U16 *>::str[] = "unsigned " STR(TYPE_INT16) " *"; |
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const char typestr<U32 *>::str[] = "unsigned " STR(TYPE_INT32) " *"; |
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const char typestr<U64 *>::str[] = "unsigned " STR(TYPE_INT64) " *"; |
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const char typestr<I8 *>::str[] = "signed " STR(TYPE_INT8) " *"; |
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const char typestr<I16 *>::str[] = STR(TYPE_INT16) " *"; |
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const char typestr<I32 *>::str[] = STR(TYPE_INT32) " *"; |
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const char typestr<I64 *>::str[] = STR(TYPE_INT64) " *"; |
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const char typestr<FLT *>::str[] = "float" " *"; |
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const char typestr<DBL *>::str[] = "double" " *"; |
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|
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struct digest : md5_ctx |
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{ |
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digest (); |
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void operator ()(const std::string &data); |
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operator std::string(); |
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}; |
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|
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digest::digest () |
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{ |
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md5_init_ctx (this); |
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} |
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|
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void digest::operator ()(const std::string &data) |
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{ |
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md5_process_bytes (data.c_str (), data.size (), this); |
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} |
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|
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digest::operator std::string () |
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{ |
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unsigned char data[16]; |
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std::ostringstream s; |
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|
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md5_finish_ctx (this, data); |
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|
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for (int i = 0; i < 16; i++) |
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s << std::setfill ('0') << std::hex << std::setw (2) << (int)data [i]; |
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|
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return s.str (); |
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} |
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|
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static inline bool |
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is_null (const std::string &s) |
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{ |
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return s.empty (); |
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} |
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|
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// error exception builder |
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struct error : std::ostringstream |
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{ |
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~error () |
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{ |
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throw std::runtime_error (str ()); |
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} |
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}; |
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|
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#define FATAL(msg) do { error o; o << msg << std::endl; } while (0) |
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#define ERRNO " (" << strerror (errno) << ")" |
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|
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env::env (const std::string &path, bool temporary) |
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: path(path), temporary(temporary) |
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{ |
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if (is_null (path)) |
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{ |
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this->path = tmpnam (0); |
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|
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if (mkdir (this->path.c_str (), 0777)) |
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FATAL ("error while creating libcpjit temporary directory" << ERRNO); |
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|
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temporary = true; |
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} |
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|
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std::string index = this->path + "/libcpjit.idx"; |
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|
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idxfd = open (index.c_str (), O_RDWR|O_CREAT, 0666); |
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|
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if (idxfd < 0) |
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FATAL (path << ": unable to open index file" << index); |
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|
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lock (); |
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load_index (); |
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unlock (); |
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} |
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|
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env::~env () |
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{ |
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if (temporary) |
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clear (); |
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} |
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|
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void env::clear () |
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{ |
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DIR *dir = opendir (path.c_str ()); |
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|
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if (dir) |
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{ |
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struct dirent *de; |
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while ((de = readdir (dir))) |
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{ |
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if (de->d_name [0] == '.') |
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continue; |
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|
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std::string f = path + "/" + de->d_name; |
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unlink (f.c_str ()); |
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} |
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|
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closedir (dir); |
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} |
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|
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if (rmdir (path.c_str ())) |
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FATAL (path << ": unable to remove libcpjit directory" << ERRNO); |
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} |
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|
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void env::dolock (bool lock) |
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{ |
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struct flock fl; |
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|
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fl.l_type = lock ? F_WRLCK : F_UNLCK; |
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fl.l_whence = SEEK_SET; |
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fl.l_start = 0; |
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fl.l_len = 0; |
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|
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while (fcntl (idxfd, F_SETLKW, &fl) < 0) |
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if (errno != EINTR) |
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FATAL (path << ": unable to lock index file" << ERRNO); |
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} |
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|
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void env::lock () |
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{ |
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dolock (true); |
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} |
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|
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void env::unlock () |
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{ |
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dolock (false); |
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} |
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|
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void |
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env::load_index () |
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{ |
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std::ifstream f ((this->path + "/libcpjit.idx").c_str ()); |
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assert (("not a cpjit directory", f)); |
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f.close (); |
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} |
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|
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void |
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env::save_index () |
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{ |
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std::ifstream f ((this->path + "/libcpjit.idx").c_str ()); |
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assert (("not a cpjit directory", f)); |
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f.close (); |
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} |
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|
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fun::fun (env &e, const std::string &id, const std::string &source) |
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: e(e), id(id), source(source), funptr(0) |
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{ |
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} |
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|
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void *fun::ptr () |
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{ |
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if (!funptr) |
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{ |
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e.lock (); |
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e.load_index (); |
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|
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std::string base = e.path + "/" + id; |
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|
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std::string fc = base + ".c"; |
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std::string fo = base + ".o"; |
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std::string fso = base + ".so"; |
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std::string fa = base + ".a"; |
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|
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std::ofstream f (fc.c_str ()); |
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f << source; |
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f.close (); |
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|
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system (("gcc -O6 -c -o " + fo + " " + fc).c_str ()); |
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|
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unlink (fc.c_str ()); |
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|
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system (("gcc -O6 -nostdlib -lgcc -shared -o " + fso + " " + fo).c_str ()); |
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printf ("%s\n", fso.c_str ()); |
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|
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void *so = dlopen (fso.c_str (), RTLD_LAZY); |
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assert (so); |
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|
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funptr = dlsym (so, id.c_str ()); |
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assert (funptr); |
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|
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e.save_index (); |
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e.unlock (); |
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} |
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|
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return funptr; |
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} |
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|
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funbuild::funbuild (env &e, const char *rettype, ...) |
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: e(e) |
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{ |
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retlist = rettype; |
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|
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std::ostringstream argl; |
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|
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va_list ap; |
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va_start (ap, rettype); |
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|
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int args = 0; |
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while ((rettype = va_arg (ap, const char *))) |
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{ |
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if (args++) |
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argl << ", "; |
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|
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argl << rettype << " a" << args; |
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} |
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|
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va_end (ap); |
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|
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arglist = argl.str (); |
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} |
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|
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void |
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funbuild::finish (std::string &id, std::string &source) |
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{ |
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digest dgst; |
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|
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dgst (retlist); |
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dgst (arglist); |
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dgst (str ()); |
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|
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id = "f_" + (std::string) dgst; |
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|
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std::ostringstream o; |
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o << retlist << " " << id << " (" << arglist << ")\n{\n" << str () << "\n}\n"; |
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source = o.str (); |
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} |
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|
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} |
