mirror of
https://github.com/python/cpython.git
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Lots of changes, most minor (fatal() instead of abort(), use of
err_fetch/err_restore and so on). But... NOTE: import.c has been rewritten and all the DL stuff is now in the new file importdl.c.
This commit is contained in:
Guido van Rossum
parent
824de25fe2
commit
1ae940a587
15 changed files with 1871 additions and 1089 deletions
381
Python/importdl.c
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381
Python/importdl.c
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/***********************************************************
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Copyright 1991, 1992, 1993, 1994 by Stichting Mathematisch Centrum,
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Amsterdam, The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Support for dynamic loading of extension modules */
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/* If no dynamic linking is supported, this file still generates some code! */
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#include "allobjects.h"
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#include "osdefs.h"
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#include "importdl.h"
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extern int verbose; /* Defined in pythonrun.c */
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/* Explanation of some of the the various #defines used by dynamic linking...
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symbol -- defined for:
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DYNAMIC_LINK -- any kind of dynamic linking
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USE_RLD -- NeXT dynamic linking
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USE_DL -- Jack's dl for IRIX 4 or GNU dld with emulation for Jack's dl
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USE_SHLIB -- SunOS or IRIX 5 (SVR4?) shared libraries
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_AIX -- AIX style dynamic linking
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NT -- NT style dynamic linking (using DLLs)
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_DL_FUNCPTR_DEFINED -- if the typedef dl_funcptr has been defined
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WITH_MAC_DL -- Mac dynamic linking (highly experimental)
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SHORT_EXT -- short extension for dynamic module, e.g. ".so"
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LONG_EXT -- long extension, e.g. "module.so"
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hpux -- HP-UX Dynamic Linking - defined by the compiler
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(The other WITH_* symbols are used only once, to set the
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appropriate symbols.)
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*/
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/* Configure dynamic linking */
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#ifdef hpux
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#define DYNAMIC_LINK
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#include <errno.h>
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typedef void (*dl_funcptr)();
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#define _DL_FUNCPTR_DEFINED 1
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#define SHORT_EXT ".sl"
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#define LONG_EXT "module.sl"
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#endif
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#ifdef NT
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#define DYNAMIC_LINK
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#include <windows.h>
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typedef FARPROC dl_funcptr;
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#define _DL_FUNCPTR_DEFINED
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#define SHORT_EXT ".dll"
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#define LONG_EXT "module.dll"
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#endif
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#if defined(NeXT) || defined(WITH_RLD)
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#define DYNAMIC_LINK
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#define USE_RLD
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#endif
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#ifdef WITH_SGI_DL
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#define DYNAMIC_LINK
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#define USE_DL
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#endif
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#ifdef WITH_DL_DLD
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#define DYNAMIC_LINK
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#define USE_DL
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#endif
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#ifdef WITH_MAC_DL
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#define DYNAMIC_LINK
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#endif
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#if !defined(DYNAMIC_LINK) && defined(HAVE_DLFCN_H) && defined(HAVE_DLOPEN)
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#define DYNAMIC_LINK
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#define USE_SHLIB
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#endif
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#ifdef _AIX
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#define DYNAMIC_LINK
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#include <sys/ldr.h>
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typedef void (*dl_funcptr)();
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#define _DL_FUNCPTR_DEFINED
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static void aix_loaderror(char *name);
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#endif
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#ifdef DYNAMIC_LINK
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#ifdef USE_SHLIB
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#include <dlfcn.h>
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#ifndef _DL_FUNCPTR_DEFINED
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typedef void (*dl_funcptr)();
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#endif
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#ifndef RTLD_LAZY
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#define RTLD_LAZY 1
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#endif
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#define SHORT_EXT ".so"
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#define LONG_EXT "module.so"
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#endif /* USE_SHLIB */
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#if defined(USE_DL) || defined(hpux)
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#include "dl.h"
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#endif
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#ifdef WITH_MAC_DL
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#include "dynamic_load.h"
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#endif
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#ifdef USE_RLD
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#include <mach-o/rld.h>
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#define FUNCNAME_PATTERN "_init%.200s"
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#ifndef _DL_FUNCPTR_DEFINED
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typedef void (*dl_funcptr)();
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#endif
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#endif /* USE_RLD */
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extern char *getprogramname();
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#ifndef FUNCNAME_PATTERN
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#if defined(__hp9000s300)
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#define FUNCNAME_PATTERN "_init%.200s"
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#else
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#define FUNCNAME_PATTERN "init%.200s"
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#endif
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#endif
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#if !defined(SHORT_EXT) && !defined(LONG_EXT)
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#define SHORT_EXT ".o"
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#define LONG_EXT "module.o"
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#endif /* !SHORT_EXT && !LONG_EXT */
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#endif /* DYNAMIC_LINK */
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/* Max length of module suffix searched for -- accommodates "module.so" */
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#ifndef MAXSUFFIXSIZE
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#define MAXSUFFIXSIZE 10
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#endif
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/* Pass it on to import.c */
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int import_maxsuffixsize = MAXSUFFIXSIZE;
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struct filedescr import_filetab[] = {
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#ifdef SHORT_EXT
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{SHORT_EXT, "rb", C_EXTENSION},
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#endif /* !SHORT_EXT */
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#ifdef LONG_EXT
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{LONG_EXT, "rb", C_EXTENSION},
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#endif /* !LONG_EXT */
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{".py", "r", PY_SOURCE},
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{".pyc", "rb", PY_COMPILED},
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{0, 0}
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};
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object *
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load_dynamic_module(name, pathname)
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char *name;
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char *pathname;
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{
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#ifndef DYNAMIC_LINK
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err_setstr(ImportError, "dynamically linked modules not supported");
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return NULL;
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#else
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object *m;
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char funcname[258];
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dl_funcptr p = NULL;
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if (m != NULL) {
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err_setstr(ImportError,
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"cannot reload dynamically loaded module");
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return NULL;
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}
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sprintf(funcname, FUNCNAME_PATTERN, name);
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#ifdef WITH_MAC_DL
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{
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object *v = dynamic_load(pathname);
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if (v == NULL)
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return NULL;
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}
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#else /* !WITH_MAC_DL */
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#ifdef USE_SHLIB
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{
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#ifdef RTLD_NOW
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/* RTLD_NOW: resolve externals now
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(i.e. core dump now if some are missing) */
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void *handle = dlopen(pathname, RTLD_NOW);
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#else
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void *handle;
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if (verbose)
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printf("dlopen(\"%s\", %d);\n", pathname, RTLD_LAZY);
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handle = dlopen(pathname, RTLD_LAZY);
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#endif /* RTLD_NOW */
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if (handle == NULL) {
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err_setstr(ImportError, dlerror());
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return NULL;
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}
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p = (dl_funcptr) dlsym(handle, funcname);
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}
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#endif /* USE_SHLIB */
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#ifdef _AIX
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p = (dl_funcptr) load(pathname, 1, 0);
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if (p == NULL) {
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aix_loaderror(pathname);
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return NULL;
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}
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#endif /* _AIX */
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#ifdef NT
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{
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HINSTANCE hDLL;
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hDLL = LoadLibrary(pathname);
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if (hDLL==NULL){
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char errBuf[64];
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sprintf(errBuf, "DLL load failed with error code %d",
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GetLastError());
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err_setstr(ImportError, errBuf);
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return NULL;
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}
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p = GetProcAddress(hDLL, funcname);
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}
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#endif /* NT */
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#ifdef USE_DL
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p = dl_loadmod(getprogramname(), pathname, funcname);
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#endif /* USE_DL */
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#ifdef USE_RLD
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{
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NXStream *errorStream;
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struct mach_header *new_header;
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const char *filenames[2];
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long ret;
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unsigned long ptr;
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errorStream = NXOpenMemory(NULL, 0, NX_WRITEONLY);
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filenames[0] = pathname;
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filenames[1] = NULL;
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ret = rld_load(errorStream, &new_header,
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filenames, NULL);
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/* extract the error messages for the exception */
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if(!ret) {
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char *streamBuf;
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int len, maxLen;
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NXPutc(errorStream, (char)0);
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NXGetMemoryBuffer(errorStream,
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&streamBuf, &len, &maxLen);
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err_setstr(ImportError, streamBuf);
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}
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if(ret && rld_lookup(errorStream, funcname, &ptr))
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p = (dl_funcptr) ptr;
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NXCloseMemory(errorStream, NX_FREEBUFFER);
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if(!ret)
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return NULL;
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}
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#endif /* USE_RLD */
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#ifdef hpux
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{
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shl_t lib;
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int flags;
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flags = BIND_DEFERRED;
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if (verbose)
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{
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flags = BIND_IMMEDIATE | BIND_NONFATAL | BIND_VERBOSE;
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printf("shl_load %s\n",pathname);
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}
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lib = shl_load(pathname, flags, 0);
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if (lib == NULL)
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{
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char buf[256];
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if (verbose)
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perror(pathname);
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sprintf(buf, "Failed to load %.200s", pathname);
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err_setstr(ImportError, buf);
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return NULL;
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}
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if (verbose)
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printf("shl_findsym %s\n", funcname);
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shl_findsym(&lib, funcname, TYPE_UNDEFINED, (void *) &p);
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if (p == NULL && verbose)
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perror(funcname);
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}
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#endif /* hpux */
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if (p == NULL) {
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err_setstr(ImportError,
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"dynamic module does not define init function");
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return NULL;
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}
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(*p)();
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#endif /* !WITH_MAC_DL */
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m = dictlookup(import_modules, name);
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if (m == NULL) {
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if (err_occurred() == NULL)
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err_setstr(SystemError,
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"dynamic module not initialized properly");
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return NULL;
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}
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if (verbose)
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fprintf(stderr,
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"import %s # dynamically loaded from %s\n",
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name, pathname);
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INCREF(m);
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return m;
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#endif /* DYNAMIC_LINK */
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}
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#ifdef _AIX
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#include <ctype.h> /* for isdigit() */
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#include <errno.h> /* for global errno */
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#include <string.h> /* for strerror() */
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void aix_loaderror(char *pathname)
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{
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char *message[8], errbuf[1024];
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int i,j;
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struct errtab {
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int errno;
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char *errstr;
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} load_errtab[] = {
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{L_ERROR_TOOMANY, "to many errors, rest skipped."},
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{L_ERROR_NOLIB, "can't load library:"},
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{L_ERROR_UNDEF, "can't find symbol in library:"},
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{L_ERROR_RLDBAD,
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"RLD index out of range or bad relocation type:"},
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{L_ERROR_FORMAT, "not a valid, executable xcoff file:"},
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{L_ERROR_MEMBER,
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"file not an archive or does not contain requested member:"},
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{L_ERROR_TYPE, "symbol table mismatch:"},
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{L_ERROR_ALIGN, "text allignment in file is wrong."},
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{L_ERROR_SYSTEM, "System error:"},
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{L_ERROR_ERRNO, NULL}
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};
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#define LOAD_ERRTAB_LEN (sizeof(load_errtab)/sizeof(load_errtab[0]))
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#define ERRBUF_APPEND(s) strncat(errbuf, s, sizeof(errbuf)-strlen(errbuf)-1)
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sprintf(errbuf, " from module %.200s ", pathname);
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if (!loadquery(1, &message[0], sizeof(message)))
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ERRBUF_APPEND(strerror(errno));
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for(i = 0; message[i] && *message[i]; i++) {
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int nerr = atoi(message[i]);
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for (j=0; j<LOAD_ERRTAB_LEN ; j++) {
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if (nerr == load_errtab[i].errno && load_errtab[i].errstr)
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ERRBUF_APPEND(load_errtab[i].errstr);
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}
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while (isdigit(*message[i])) message[i]++ ;
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ERRBUF_APPEND(message[i]);
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ERRBUF_APPEND("\n");
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}
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errbuf[strlen(errbuf)-1] = '\0'; /* trim off last newline */
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err_setstr(ImportError, errbuf);
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return;
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}
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#endif /* _AIX */
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