mirror of
https://github.com/python/cpython
synced 2024-09-15 22:26:46 +00:00
338d54f0a5
[Issue 28401](https://bugs.python.org/issue28401): Don't attempt to import the stable API extensions, they are not supported in PyDEBUG builds (which don't implement that ABI). https://bugs.python.org/issue28401
132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
|
|
/* Support for dynamic loading of extension modules */
|
|
|
|
#include "Python.h"
|
|
#include "pycore_pystate.h"
|
|
#include "importdl.h"
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
#if defined(__NetBSD__)
|
|
#include <sys/param.h>
|
|
#if (NetBSD < 199712)
|
|
#include <nlist.h>
|
|
#include <link.h>
|
|
#define dlerror() "error in dynamic linking"
|
|
#endif
|
|
#endif /* NetBSD */
|
|
|
|
#ifdef HAVE_DLFCN_H
|
|
#include <dlfcn.h>
|
|
#endif
|
|
|
|
#if (defined(__OpenBSD__) || defined(__NetBSD__)) && !defined(__ELF__)
|
|
#define LEAD_UNDERSCORE "_"
|
|
#else
|
|
#define LEAD_UNDERSCORE ""
|
|
#endif
|
|
|
|
/* The .so extension module ABI tag, supplied by the Makefile via
|
|
Makefile.pre.in and configure. This is used to discriminate between
|
|
incompatible .so files so that extensions for different Python builds can
|
|
live in the same directory. E.g. foomodule.cpython-32.so
|
|
*/
|
|
|
|
const char *_PyImport_DynLoadFiletab[] = {
|
|
#ifdef __CYGWIN__
|
|
".dll",
|
|
#else /* !__CYGWIN__ */
|
|
"." SOABI ".so",
|
|
#ifndef Py_DEBUG
|
|
".abi" PYTHON_ABI_STRING ".so",
|
|
#endif /* ! Py_DEBUG */
|
|
".so",
|
|
#endif /* __CYGWIN__ */
|
|
NULL,
|
|
};
|
|
|
|
static struct {
|
|
dev_t dev;
|
|
ino_t ino;
|
|
void *handle;
|
|
} handles[128];
|
|
static int nhandles = 0;
|
|
|
|
|
|
dl_funcptr
|
|
_PyImport_FindSharedFuncptr(const char *prefix,
|
|
const char *shortname,
|
|
const char *pathname, FILE *fp)
|
|
{
|
|
dl_funcptr p;
|
|
void *handle;
|
|
char funcname[258];
|
|
char pathbuf[260];
|
|
int dlopenflags=0;
|
|
|
|
if (strchr(pathname, '/') == NULL) {
|
|
/* Prefix bare filename with "./" */
|
|
PyOS_snprintf(pathbuf, sizeof(pathbuf), "./%-.255s", pathname);
|
|
pathname = pathbuf;
|
|
}
|
|
|
|
PyOS_snprintf(funcname, sizeof(funcname),
|
|
LEAD_UNDERSCORE "%.20s_%.200s", prefix, shortname);
|
|
|
|
if (fp != NULL) {
|
|
int i;
|
|
struct _Py_stat_struct status;
|
|
if (_Py_fstat(fileno(fp), &status) == -1)
|
|
return NULL;
|
|
for (i = 0; i < nhandles; i++) {
|
|
if (status.st_dev == handles[i].dev &&
|
|
status.st_ino == handles[i].ino) {
|
|
p = (dl_funcptr) dlsym(handles[i].handle,
|
|
funcname);
|
|
return p;
|
|
}
|
|
}
|
|
if (nhandles < 128) {
|
|
handles[nhandles].dev = status.st_dev;
|
|
handles[nhandles].ino = status.st_ino;
|
|
}
|
|
}
|
|
|
|
dlopenflags = _PyInterpreterState_Get()->dlopenflags;
|
|
|
|
handle = dlopen(pathname, dlopenflags);
|
|
|
|
if (handle == NULL) {
|
|
PyObject *mod_name;
|
|
PyObject *path;
|
|
PyObject *error_ob;
|
|
const char *error = dlerror();
|
|
if (error == NULL)
|
|
error = "unknown dlopen() error";
|
|
error_ob = PyUnicode_FromString(error);
|
|
if (error_ob == NULL)
|
|
return NULL;
|
|
mod_name = PyUnicode_FromString(shortname);
|
|
if (mod_name == NULL) {
|
|
Py_DECREF(error_ob);
|
|
return NULL;
|
|
}
|
|
path = PyUnicode_FromString(pathname);
|
|
if (path == NULL) {
|
|
Py_DECREF(error_ob);
|
|
Py_DECREF(mod_name);
|
|
return NULL;
|
|
}
|
|
PyErr_SetImportError(error_ob, mod_name, path);
|
|
Py_DECREF(error_ob);
|
|
Py_DECREF(mod_name);
|
|
Py_DECREF(path);
|
|
return NULL;
|
|
}
|
|
if (fp != NULL && nhandles < 128)
|
|
handles[nhandles++].handle = handle;
|
|
p = (dl_funcptr) dlsym(handle, funcname);
|
|
return p;
|
|
}
|