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gh-117953: Add Internal struct _Py_ext_module_loader_info (gh-118194)

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This helps with a later change that splits up _PyImport_LoadDynamicModuleWithSpec().
This commit is contained in:
Eric Snow 2024-04-24 11:42:01 -06:00 • committed by GitHub
parent 9b280ab0ab
commit 5865fa5f9b
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GPG key ID: B5690EEEBB952194
3 changed files with 180 additions and 94 deletions
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94
Python/import.c
View file

@ -1328,11 +1328,11 @@ _PyImport_FixupExtensionObject(PyObject *mod, PyObject *name,
static PyObject *
import_find_extension(PyThreadState *tstate, PyObject *name,
PyObject *path)
import_find_extension(PyThreadState *tstate,
struct _Py_ext_module_loader_info *info)
{
/* Only single-phase init modules will be in the cache. */
PyModuleDef *def = _extensions_cache_get(path, name);
PyModuleDef *def = _extensions_cache_get(info->path, info->name);
if (def == NULL) {
return NULL;
}
@ -1340,7 +1340,7 @@ import_find_extension(PyThreadState *tstate, PyObject *name,
/* It may have been successfully imported previously
in an interpreter that allows legacy modules
but is not allowed in the current interpreter. */
const char *name_buf = PyUnicode_AsUTF8(name);
const char *name_buf = PyUnicode_AsUTF8(info->name);
assert(name_buf != NULL);
if (_PyImport_CheckSubinterpIncompatibleExtensionAllowed(name_buf) < 0) {
return NULL;
@ -1355,12 +1355,13 @@ import_find_extension(PyThreadState *tstate, PyObject *name,
if (m_copy == NULL) {
/* It might be a core module (e.g. sys & builtins),
for which we don't set m_copy. */
m_copy = get_core_module_dict(tstate->interp, name, path);
m_copy = get_core_module_dict(
tstate->interp, info->name, info->path);
if (m_copy == NULL) {
return NULL;
}
}
mod = import_add_module(tstate, name);
mod = import_add_module(tstate, info->name);
if (mod == NULL) {
return NULL;
}
@ -1378,15 +1379,16 @@ import_find_extension(PyThreadState *tstate, PyObject *name,
if (def->m_base.m_init == NULL)
return NULL;
mod = def->m_base.m_init();
if (mod == NULL)
if (mod == NULL) {
return NULL;
if (PyObject_SetItem(modules, name, mod) == -1) {
}
if (PyObject_SetItem(modules, info->name, mod) == -1) {
Py_DECREF(mod);
return NULL;
}
}
if (_modules_by_index_set(tstate->interp, def, mod) < 0) {
PyMapping_DelItem(modules, name);
PyMapping_DelItem(modules, info->name);
Py_DECREF(mod);
return NULL;
}
@ -1394,7 +1396,7 @@ import_find_extension(PyThreadState *tstate, PyObject *name,
int verbose = _PyInterpreterState_GetConfig(tstate->interp)->verbose;
if (verbose) {
PySys_FormatStderr("import %U # previously loaded (%R)\n",
name, path);
info->name, info->path);
}
return mod;
}
@ -1505,44 +1507,56 @@ static PyObject*
create_builtin(PyThreadState *tstate, PyObject *name, PyObject *spec)
{
PyModuleDef *def = NULL;
PyObject *mod = import_find_extension(tstate, name, name);
struct _Py_ext_module_loader_info info;
if (_Py_ext_module_loader_info_init(&info, name, NULL) < 0) {
return NULL;
}
PyObject *mod = import_find_extension(tstate, &info);
if (mod || _PyErr_Occurred(tstate)) {
return mod;
goto finally;
}
struct _inittab *found = NULL;
for (struct _inittab *p = INITTAB; p->name != NULL; p++) {
if (_PyUnicode_EqualToASCIIString(name, p->name)) {
if (_PyUnicode_EqualToASCIIString(info.name, p->name)) {
found = p;
}
}
if (found == NULL) {
// not found
Py_RETURN_NONE;
mod = Py_NewRef(Py_None);
goto finally;
}
PyModInitFunction p0 = (PyModInitFunction)found->initfunc;
if (p0 == NULL) {
/* Cannot re-init internal module ("sys" or "builtins") */
assert(is_core_module(tstate->interp, name, name));
return import_add_module(tstate, name);
assert(is_core_module(tstate->interp, info.name, info.path));
mod = import_add_module(tstate, info.name);
goto finally;
}
mod = p0();
if (mod == NULL) {
return NULL;
goto finally;
}
if (PyObject_TypeCheck(mod, &PyModuleDef_Type)) {
def = (PyModuleDef*)mod;
assert(!is_singlephase(def));
return PyModule_FromDefAndSpec(def, spec);
mod = PyModule_FromDefAndSpec(def, spec);
if (mod == NULL) {
goto finally;
}
}
else {
assert(PyModule_Check(mod));
def = PyModule_GetDef(mod);
if (def == NULL) {
return NULL;
Py_CLEAR(mod);
goto finally;
}
assert(is_singlephase(def));
@ -1553,22 +1567,29 @@ create_builtin(PyThreadState *tstate, PyObject *name, PyObject *spec)
// gh-88216: Extensions and def->m_base.m_copy can be updated
// when the extension module doesn't support sub-interpreters.
if (def->m_size == -1
&& !is_core_module(tstate->interp, name, name))
&& !is_core_module(tstate->interp, info.name, info.path))
{
singlephase.m_dict = PyModule_GetDict(mod);
assert(singlephase.m_dict != NULL);
}
if (update_global_state_for_extension(
tstate, name, name, def, &singlephase) < 0)
tstate, info.name, info.path, def, &singlephase) < 0)
{
return NULL;
Py_CLEAR(mod);
goto finally;
}
PyObject *modules = get_modules_dict(tstate, true);
if (finish_singlephase_extension(tstate, mod, def, name, modules) < 0) {
return NULL;
if (finish_singlephase_extension(
tstate, mod, def, info.name, modules) < 0)
{
Py_CLEAR(mod);
goto finally;
}
return mod;
}
finally:
_Py_ext_module_loader_info_clear(&info);
return mod;
}
@ -3878,28 +3899,22 @@ static PyObject *
_imp_create_dynamic_impl(PyObject *module, PyObject *spec, PyObject *file)
/*[clinic end generated code: output=83249b827a4fde77 input=c31b954f4cf4e09d]*/
{
PyObject *mod, *name, *filename;
PyObject *mod = NULL;
FILE *fp;
name = PyObject_GetAttrString(spec, "name");
if (name == NULL) {
return NULL;
}
filename = PyObject_GetAttrString(spec, "origin");
if (filename == NULL) {
Py_DECREF(name);
struct _Py_ext_module_loader_info info;
if (_Py_ext_module_loader_info_init_from_spec(&info, spec) < 0) {
return NULL;
}
PyThreadState *tstate = _PyThreadState_GET();
mod = import_find_extension(tstate, name, filename);
mod = import_find_extension(tstate, &info);
if (mod != NULL || _PyErr_Occurred(tstate)) {
assert(mod == NULL || !_PyErr_Occurred(tstate));
goto finally;
}
if (PySys_Audit("import", "OOOOO", name, filename,
if (PySys_Audit("import", "OOOOO", info.name, info.filename,
Py_None, Py_None, Py_None) < 0)
{
goto finally;
@ -3911,7 +3926,7 @@ _imp_create_dynamic_impl(PyObject *module, PyObject *spec, PyObject *file)
* _PyImport_GetModInitFunc(), but it isn't clear if the intervening
* code relies on fp still being open. */
if (file != NULL) {
fp = _Py_fopen_obj(filename, "r");
fp = _Py_fopen_obj(info.filename, "r");
if (fp == NULL) {
goto finally;
}
@ -3920,7 +3935,7 @@ _imp_create_dynamic_impl(PyObject *module, PyObject *spec, PyObject *file)
fp = NULL;
}
mod = _PyImport_LoadDynamicModuleWithSpec(spec, fp);
mod = _PyImport_LoadDynamicModuleWithSpec(&info, spec, fp);
// XXX Shouldn't this happen in the error cases too.
if (fp) {
@ -3928,8 +3943,7 @@ _imp_create_dynamic_impl(PyObject *module, PyObject *spec, PyObject *file)
}
finally:
Py_DECREF(name);
Py_DECREF(filename);
_Py_ext_module_loader_info_clear(&info);
return mod;
}

150
Python/importdl.c
View file

@ -93,57 +93,108 @@ get_encoded_name(PyObject *name, const char **hook_prefix) {
return NULL;
}
PyObject *
_PyImport_LoadDynamicModuleWithSpec(PyObject *spec, FILE *fp)
void
_Py_ext_module_loader_info_clear(struct _Py_ext_module_loader_info *info)
{
Py_CLEAR(info->filename);
#ifndef MS_WINDOWS
PyObject *filename_bytes = NULL;
const char *filename_buf;
Py_CLEAR(info->filename_encoded);
#endif
PyObject *name_unicode = NULL, *name = NULL, *filename = NULL, *m = NULL;
const char *name_buf, *hook_prefix;
const char *oldcontext, *newcontext;
dl_funcptr exportfunc;
PyModuleDef *def;
PyModInitFunction p0;
Py_CLEAR(info->name);
Py_CLEAR(info->name_encoded);
}
name_unicode = PyObject_GetAttrString(spec, "name");
if (name_unicode == NULL) {
return NULL;
}
if (!PyUnicode_Check(name_unicode)) {
int
_Py_ext_module_loader_info_init(struct _Py_ext_module_loader_info *p_info,
PyObject *name, PyObject *filename)
{
struct _Py_ext_module_loader_info info = {0};
assert(name != NULL);
if (!PyUnicode_Check(name)) {
PyErr_SetString(PyExc_TypeError,
"spec.name must be a string");
goto error;
"module name must be a string");
_Py_ext_module_loader_info_clear(&info);
return -1;
}
newcontext = PyUnicode_AsUTF8(name_unicode);
if (newcontext == NULL) {
goto error;
info.name = Py_NewRef(name);
info.name_encoded = get_encoded_name(info.name, &info.hook_prefix);
if (info.name_encoded == NULL) {
_Py_ext_module_loader_info_clear(&info);
return -1;
}
name = get_encoded_name(name_unicode, &hook_prefix);
info.newcontext = PyUnicode_AsUTF8(info.name);
if (info.newcontext == NULL) {
_Py_ext_module_loader_info_clear(&info);
return -1;
}
if (filename != NULL) {
if (!PyUnicode_Check(filename)) {
PyErr_SetString(PyExc_TypeError,
"module filename must be a string");
_Py_ext_module_loader_info_clear(&info);
return -1;
}
info.filename = Py_NewRef(filename);
#ifndef MS_WINDOWS
info.filename_encoded = PyUnicode_EncodeFSDefault(info.filename);
if (info.filename_encoded == NULL) {
_Py_ext_module_loader_info_clear(&info);
return -1;
}
#endif
info.path = info.filename;
}
else {
info.path = info.name;
}
*p_info = info;
return 0;
}
int
_Py_ext_module_loader_info_init_from_spec(
struct _Py_ext_module_loader_info *p_info,
PyObject *spec)
{
PyObject *name = PyObject_GetAttrString(spec, "name");
if (name == NULL) {
goto error;
return -1;
}
name_buf = PyBytes_AS_STRING(name);
filename = PyObject_GetAttrString(spec, "origin");
PyObject *filename = PyObject_GetAttrString(spec, "origin");
if (filename == NULL) {
goto error;
return -1;
}
return _Py_ext_module_loader_info_init(p_info, name, filename);
}
PyObject *
_PyImport_LoadDynamicModuleWithSpec(struct _Py_ext_module_loader_info *info,
PyObject *spec, FILE *fp)
{
PyObject *m = NULL;
const char *name_buf = PyBytes_AS_STRING(info->name_encoded);
const char *oldcontext;
dl_funcptr exportfunc;
PyModInitFunction p0;
PyModuleDef *def;
#ifdef MS_WINDOWS
exportfunc = _PyImport_FindSharedFuncptrWindows(
hook_prefix, name_buf, filename, fp);
info->hook_prefix, name_buf, info->filename, fp);
#else
filename_bytes = PyUnicode_EncodeFSDefault(filename);
if (filename_bytes == NULL) {
goto error;
{
const char *path_buf = PyBytes_AS_STRING(info->filename_encoded);
exportfunc = _PyImport_FindSharedFuncptr(
info->hook_prefix, name_buf, path_buf, fp);
}
filename_buf = PyBytes_AS_STRING(filename_bytes);
exportfunc = _PyImport_FindSharedFuncptr(
hook_prefix, name_buf, filename_buf, fp);
Py_DECREF(filename_bytes);
#endif
if (exportfunc == NULL) {
@ -152,11 +203,11 @@ _PyImport_LoadDynamicModuleWithSpec(PyObject *spec, FILE *fp)
msg = PyUnicode_FromFormat(
"dynamic module does not define "
"module export function (%s_%s)",
hook_prefix, name_buf);
if (msg == NULL)
goto error;
PyErr_SetImportError(msg, name_unicode, filename);
Py_DECREF(msg);
info->hook_prefix, name_buf);
if (msg != NULL) {
PyErr_SetImportError(msg, info->name, info->filename);
Py_DECREF(msg);
}
}
goto error;
}
@ -164,7 +215,7 @@ _PyImport_LoadDynamicModuleWithSpec(PyObject *spec, FILE *fp)
p0 = (PyModInitFunction)exportfunc;
/* Package context is needed for single-phase init */
oldcontext = _PyImport_SwapPackageContext(newcontext);
oldcontext = _PyImport_SwapPackageContext(info->newcontext);
m = p0();
_PyImport_SwapPackageContext(oldcontext);
@ -195,9 +246,6 @@ _PyImport_LoadDynamicModuleWithSpec(PyObject *spec, FILE *fp)
goto error;
}
if (PyObject_TypeCheck(m, &PyModuleDef_Type)) {
Py_DECREF(name_unicode);
Py_DECREF(name);
Py_DECREF(filename);
return PyModule_FromDefAndSpec((PyModuleDef*)m, spec);
}
@ -207,7 +255,7 @@ _PyImport_LoadDynamicModuleWithSpec(PyObject *spec, FILE *fp)
goto error;
}
if (hook_prefix == nonascii_prefix) {
if (info->hook_prefix == nonascii_prefix) {
/* don't allow legacy init for non-ASCII module names */
PyErr_Format(
PyExc_SystemError,
@ -227,24 +275,20 @@ _PyImport_LoadDynamicModuleWithSpec(PyObject *spec, FILE *fp)
def->m_base.m_init = p0;
/* Remember the filename as the __file__ attribute */
if (PyModule_AddObjectRef(m, "__file__", filename) < 0) {
if (PyModule_AddObjectRef(m, "__file__", info->filename) < 0) {
PyErr_Clear(); /* Not important enough to report */
}
PyObject *modules = PyImport_GetModuleDict();
if (_PyImport_FixupExtensionObject(m, name_unicode, filename, modules) < 0)
if (_PyImport_FixupExtensionObject(
m, info->name, info->filename, modules) < 0)
{
goto error;
Py_DECREF(name_unicode);
Py_DECREF(name);
Py_DECREF(filename);
}
return m;
error:
Py_DECREF(name_unicode);
Py_XDECREF(name);
Py_XDECREF(filename);
Py_XDECREF(m);
return NULL;
}