mirror of
https://github.com/python/cpython.git
synced 2024-11-30 05:15:14 +08:00
ae9e7960d3
When an extension imports another extension in its
initXXX() function, the variable _Py_PackageContext is
prematurely reset to NULL. If the outer extension then
calls Py_InitModule(), the extension is installed in
sys.modules without its package name. The
manifestation of this bug is a "SystemError:
_PyImport_FixupExtension: module <package>.<extension>
not loaded".
To fix this, importdl.c just needs to retain the old
value of _Py_PackageContext and restore it after the
initXXX() method is called. The attached patch does this.
This patch applies to Python 2.1.1 and the current CVS.
81 lines
2.0 KiB
C
81 lines
2.0 KiB
C
|
|
/* Support for dynamic loading of extension modules */
|
|
|
|
#include "Python.h"
|
|
|
|
/* ./configure sets HAVE_DYNAMIC_LOADING if dynamic loading of modules is
|
|
supported on this platform. configure will then compile and link in one
|
|
of the dynload_*.c files, as appropriate. We will call a function in
|
|
those modules to get a function pointer to the module's init function.
|
|
*/
|
|
#ifdef HAVE_DYNAMIC_LOADING
|
|
|
|
#include "importdl.h"
|
|
|
|
extern dl_funcptr _PyImport_GetDynLoadFunc(const char *name,
|
|
const char *shortname,
|
|
const char *pathname, FILE *fp);
|
|
|
|
|
|
|
|
PyObject *
|
|
_PyImport_LoadDynamicModule(char *name, char *pathname, FILE *fp)
|
|
{
|
|
PyObject *m, *d, *s;
|
|
char *lastdot, *shortname, *packagecontext, *oldcontext;
|
|
dl_funcptr p;
|
|
|
|
if ((m = _PyImport_FindExtension(name, pathname)) != NULL) {
|
|
Py_INCREF(m);
|
|
return m;
|
|
}
|
|
lastdot = strrchr(name, '.');
|
|
if (lastdot == NULL) {
|
|
packagecontext = NULL;
|
|
shortname = name;
|
|
}
|
|
else {
|
|
packagecontext = name;
|
|
shortname = lastdot+1;
|
|
}
|
|
|
|
p = _PyImport_GetDynLoadFunc(name, shortname, pathname, fp);
|
|
if (PyErr_Occurred())
|
|
return NULL;
|
|
if (p == NULL) {
|
|
PyErr_Format(PyExc_ImportError,
|
|
"dynamic module does not define init function (init%.200s)",
|
|
shortname);
|
|
return NULL;
|
|
}
|
|
oldcontext = _Py_PackageContext;
|
|
_Py_PackageContext = packagecontext;
|
|
(*p)();
|
|
_Py_PackageContext = oldcontext;
|
|
if (PyErr_Occurred())
|
|
return NULL;
|
|
if (_PyImport_FixupExtension(name, pathname) == NULL)
|
|
return NULL;
|
|
|
|
m = PyDict_GetItemString(PyImport_GetModuleDict(), name);
|
|
if (m == NULL) {
|
|
PyErr_SetString(PyExc_SystemError,
|
|
"dynamic module not initialized properly");
|
|
return NULL;
|
|
}
|
|
/* Remember the filename as the __file__ attribute */
|
|
d = PyModule_GetDict(m);
|
|
s = PyString_FromString(pathname);
|
|
if (s == NULL || PyDict_SetItemString(d, "__file__", s) != 0)
|
|
PyErr_Clear(); /* Not important enough to report */
|
|
Py_XDECREF(s);
|
|
if (Py_VerboseFlag)
|
|
PySys_WriteStderr(
|
|
"import %s # dynamically loaded from %s\n",
|
|
name, pathname);
|
|
Py_INCREF(m);
|
|
return m;
|
|
}
|
|
|
|
#endif /* HAVE_DYNAMIC_LOADING */
|