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bpo-35713: Reorganize sys module initialization (GH-11658)

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* Rename _PySys_BeginInit() to _PySys_InitCore().
* Rename _PySys_EndInit() to _PySys_InitMain().
* Add _PySys_Create(). It calls _PySys_InitCore() which becomes
  private.
* Add _PySys_SetPreliminaryStderr().
* Rename _Py_ReadyTypes() to _PyTypes_Init().
* Misc code cleanup.
This commit is contained in:
Victor Stinner 2019-01-23 15:04:40 +01:00 • committed by GitHub
parent cda73a5af2
commit ab67281e95
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 96 additions and 75 deletions
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9
Include/internal/pycore_pylifecycle.h
View file

@ -27,8 +27,11 @@ extern int _PyLong_Init(void);
extern _PyInitError _PyFaulthandler_Init(int enable);
extern int _PyTraceMalloc_Init(int enable);
extern PyObject * _PyBuiltin_Init(void);
extern _PyInitError _PySys_BeginInit(PyObject **sysmod);
extern int _PySys_EndInit(PyObject *sysdict, PyInterpreterState *interp);
extern _PyInitError _PySys_Create(
PyInterpreterState *interp,
PyObject **sysmod_p);
extern _PyInitError _PySys_SetPreliminaryStderr(PyObject *sysdict);
extern int _PySys_InitMain(PyInterpreterState *interp);
extern _PyInitError _PyImport_Init(PyInterpreterState *interp);
extern _PyInitError _PyExc_Init(void);
extern _PyInitError _PyBuiltins_AddExceptions(PyObject * bltinmod);
@ -36,7 +39,7 @@ extern _PyInitError _PyImportHooks_Init(void);
extern int _PyFloat_Init(void);
extern _PyInitError _Py_HashRandomization_Init(const _PyCoreConfig *);
extern _PyInitError _Py_ReadyTypes(void);
extern _PyInitError _PyTypes_Init(void);
/* Various internal finalizers */

2
Objects/object.c
View file

@ -1717,7 +1717,7 @@ PyObject _Py_NotImplementedStruct = {
};
_PyInitError
_Py_ReadyTypes(void)
_PyTypes_Init(void)
{
#define INIT_TYPE(TYPE, NAME) \
do { \

61
Python/pylifecycle.c
View file

@ -589,7 +589,7 @@ pycore_create_interpreter(const _PyCoreConfig *core_config,
static _PyInitError
pycore_init_types(void)
{
_PyInitError err = _Py_ReadyTypes();
_PyInitError err = _PyTypes_Init();
if (_Py_INIT_FAILED(err)) {
return err;
}
@ -623,46 +623,6 @@ pycore_init_types(void)
}
static _PyInitError
pycore_init_sys(PyInterpreterState *interp, PyObject **sysmod_p)
{
PyObject *modules = PyDict_New();
if (modules == NULL)
return _Py_INIT_ERR("can't make modules dictionary");
interp->modules = modules;
PyObject *sysmod;
_PyInitError err = _PySys_BeginInit(&sysmod);
if (_Py_INIT_FAILED(err)) {
return err;
}
*sysmod_p = sysmod;
interp->sysdict = PyModule_GetDict(sysmod);
if (interp->sysdict == NULL) {
return _Py_INIT_ERR("can't initialize sys dict");
}
Py_INCREF(interp->sysdict);
PyDict_SetItemString(interp->sysdict, "modules", modules);
_PyImport_FixupBuiltin(sysmod, "sys", modules);
/* Set up a preliminary stderr printer until we have enough
infrastructure for the io module in place.
Use UTF-8/surrogateescape and ignore EAGAIN errors. */
PyObject *pstderr = PyFile_NewStdPrinter(fileno(stderr));
if (pstderr == NULL) {
return _Py_INIT_ERR("can't set preliminary stderr");
}
_PySys_SetObjectId(&PyId_stderr, pstderr);
PySys_SetObject("__stderr__", pstderr);
Py_DECREF(pstderr);
return _Py_INIT_OK();
}
static _PyInitError
pycore_init_builtins(PyInterpreterState *interp)
{
@ -746,7 +706,7 @@ _Py_InitializeCore_impl(PyInterpreterState **interp_p,
}
PyObject *sysmod;
err = pycore_init_sys(interp, &sysmod);
err = _PySys_Create(interp, &sysmod);
if (_Py_INIT_FAILED(err)) {
return err;
}
@ -887,7 +847,7 @@ _Py_InitializeMainInterpreter(PyInterpreterState *interp,
return _Py_INIT_ERR("can't initialize time");
}
if (_PySys_EndInit(interp->sysdict, interp) < 0) {
if (_PySys_InitMain(interp) < 0) {
return _Py_INIT_ERR("can't finish initializing sys");
}
@ -1376,7 +1336,9 @@ new_interpreter(PyThreadState **tstate_p)
goto handle_error;
Py_INCREF(interp->sysdict);
PyDict_SetItemString(interp->sysdict, "modules", modules);
_PySys_EndInit(interp->sysdict, interp);
if (_PySys_InitMain(interp) < 0) {
return _Py_INIT_ERR("can't finish initializing sys");
}
}
else if (PyErr_Occurred()) {
goto handle_error;
@ -1399,15 +1361,10 @@ new_interpreter(PyThreadState **tstate_p)
return err;
}
/* Set up a preliminary stderr printer until we have enough
infrastructure for the io module in place. */
PyObject *pstderr = PyFile_NewStdPrinter(fileno(stderr));
if (pstderr == NULL) {
return _Py_INIT_ERR("can't set preliminary stderr");
err = _PySys_SetPreliminaryStderr(interp->sysdict);
if (_Py_INIT_FAILED(err)) {
return err;
}
_PySys_SetObjectId(&PyId_stderr, pstderr);
PySys_SetObject("__stderr__", pstderr);
Py_DECREF(pstderr);
err = _PyImportHooks_Init();
if (_Py_INIT_FAILED(err)) {

99
Python/sysmodule.c
View file

@ -2368,19 +2368,12 @@ static struct PyModuleDef sysmodule = {
} \
} while (0)
_PyInitError
_PySys_BeginInit(PyObject **sysmod)
static _PyInitError
_PySys_InitCore(PyObject *sysdict)
{
PyObject *m, *sysdict, *version_info;
PyObject *version_info;
int res;
m = _PyModule_CreateInitialized(&sysmodule, PYTHON_API_VERSION);
if (m == NULL) {
return _Py_INIT_ERR("failed to create a module object");
}
sysdict = PyModule_GetDict(m);
/* stdin/stdout/stderr are set in pylifecycle.c */
SET_SYS_FROM_STRING_BORROW("__displayhook__",
@ -2508,9 +2501,6 @@ _PySys_BeginInit(PyObject **sysmod)
if (PyErr_Occurred()) {
goto err_occurred;
}
*sysmod = m;
return _Py_INIT_OK();
type_init_failed:
@ -2536,8 +2526,9 @@ _PySys_BeginInit(PyObject **sysmod)
} while (0)
int
_PySys_EndInit(PyObject *sysdict, PyInterpreterState *interp)
_PySys_InitMain(PyInterpreterState *interp)
{
PyObject *sysdict = interp->sysdict;
const _PyCoreConfig *core_config = &interp->core_config;
const _PyMainInterpreterConfig *config = &interp->config;
int res;
@ -2552,9 +2543,8 @@ _PySys_EndInit(PyObject *sysdict, PyInterpreterState *interp)
#define COPY_LIST(KEY, ATTR) \
do { \
assert(PyList_Check(config->ATTR)); \
PyObject *list = PyList_GetSlice(config->ATTR, \
0, PyList_GET_SIZE(config->ATTR)); \
assert(PyList_Check(ATTR)); \
PyObject *list = PyList_GetSlice(ATTR, 0, PyList_GET_SIZE(ATTR)); \
if (list == NULL) { \
return -1; \
} \
@ -2562,7 +2552,7 @@ _PySys_EndInit(PyObject *sysdict, PyInterpreterState *interp)
Py_DECREF(list); \
} while (0)
COPY_LIST("path", module_search_path);
COPY_LIST("path", config->module_search_path);
SET_SYS_FROM_STRING_BORROW("executable", config->executable);
SET_SYS_FROM_STRING_BORROW("prefix", config->prefix);
@ -2580,7 +2570,7 @@ _PySys_EndInit(PyObject *sysdict, PyInterpreterState *interp)
SET_SYS_FROM_STRING_BORROW("argv", config->argv);
}
if (config->warnoptions != NULL) {
COPY_LIST("warnoptions", warnoptions);
COPY_LIST("warnoptions", config->warnoptions);
}
if (config->xoptions != NULL) {
PyObject *dict = PyDict_Copy(config->xoptions);
@ -2631,6 +2621,77 @@ _PySys_EndInit(PyObject *sysdict, PyInterpreterState *interp)
#undef SET_SYS_FROM_STRING_BORROW
#undef SET_SYS_FROM_STRING_INT_RESULT
/* Set up a preliminary stderr printer until we have enough
infrastructure for the io module in place.
Use UTF-8/surrogateescape and ignore EAGAIN errors. */
_PyInitError
_PySys_SetPreliminaryStderr(PyObject *sysdict)
{
PyObject *pstderr = PyFile_NewStdPrinter(fileno(stderr));
if (pstderr == NULL) {
goto error;
}
if (_PyDict_SetItemId(sysdict, &PyId_stderr, pstderr) < 0) {
goto error;
}
if (PyDict_SetItemString(sysdict, "__stderr__", pstderr) < 0) {
goto error;
}
Py_DECREF(pstderr);
return _Py_INIT_OK();
error:
Py_XDECREF(pstderr);
return _Py_INIT_ERR("can't set preliminary stderr");
}
/* Create sys module without all attributes: _PySys_InitMain() should be called
later to add remaining attributes. */
_PyInitError
_PySys_Create(PyInterpreterState *interp, PyObject **sysmod_p)
{
PyObject *modules = PyDict_New();
if (modules == NULL) {
return _Py_INIT_ERR("can't make modules dictionary");
}
interp->modules = modules;
PyObject *sysmod = _PyModule_CreateInitialized(&sysmodule, PYTHON_API_VERSION);
if (sysmod == NULL) {
return _Py_INIT_ERR("failed to create a module object");
}
PyObject *sysdict = PyModule_GetDict(sysmod);
if (sysdict == NULL) {
return _Py_INIT_ERR("can't initialize sys dict");
}
Py_INCREF(sysdict);
interp->sysdict = sysdict;
if (PyDict_SetItemString(sysdict, "modules", interp->modules) < 0) {
return _Py_INIT_ERR("can't initialize sys module");
}
_PyInitError err = _PySys_SetPreliminaryStderr(sysdict);
if (_Py_INIT_FAILED(err)) {
return err;
}
err = _PySys_InitCore(sysdict);
if (_Py_INIT_FAILED(err)) {
return err;
}
_PyImport_FixupBuiltin(sysmod, "sys", interp->modules);
*sysmod_p = sysmod;
return _Py_INIT_OK();
}
static PyObject *
makepathobject(const wchar_t *path, wchar_t delim)
{