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bpo-42260: Compute the path config in the main init (GH-23211) 

The path configuration is now computed in the "main" initialization.
The core initialization no longer computes it.

* Add _PyConfig_Read() function to read the configuration without
  computing the path configuration.
* pyinit_core() no longer computes the path configuration: it is now
  computed by init_interp_main().
* The path configuration output members of PyConfig are now optional:

  * executable
  * base_executable
  * prefix
  * base_prefix
  * exec_prefix
  * base_exec_prefix

* _PySys_UpdateConfig() now skips NULL strings in PyConfig.
* _testembed: Rename test_set_config() to test_init_set_config() for
  consistency with other tests.
This commit is contained in:
Victor Stinner 2020-11-10 13:21:52 +01:00 committed by GitHub
parent 38811d68ca
commit 9e1b828265
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 85 additions and 74 deletions
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1
Include/internal/pycore_initconfig.h
View File

@ -152,6 +152,7 @@ extern PyStatus _PyConfig_Copy(
PyConfig *config,
const PyConfig *config2);
extern PyStatus _PyConfig_InitPathConfig(PyConfig *config);
extern PyStatus _PyConfig_Read(PyConfig *config, int compute_path_config);
extern PyStatus _PyConfig_Write(const PyConfig *config,
struct pyruntimestate *runtime);
extern PyStatus _PyConfig_SetPyArgv(

26
Lib/test/_test_embed_set_config.py
View File

@ -100,19 +100,19 @@ class SetConfigTests(unittest.TestCase):
'check_hash_pycs_mode',
'program_name',
'platlibdir',
'executable',
'base_executable',
'prefix',
'base_prefix',
'exec_prefix',
'base_exec_prefix',
# optional wstr:
# 'pythonpath_env'
# 'home',
# 'home'
# 'pycache_prefix'
# 'run_command'
# 'run_module'
# 'run_filename'
# 'executable'
# 'prefix'
# 'exec_prefix'
# 'base_executable'
# 'base_prefix'
# 'base_exec_prefix'
):
value_tests.append((key, invalid_wstr))
type_tests.append((key, b'bytes'))
@ -217,6 +217,18 @@ class SetConfigTests(unittest.TestCase):
self.set_config(base_executable="base_executable")
self.assertEqual(sys._base_executable, "base_executable")
# When base_xxx is NULL, value is copied from xxxx
self.set_config(
executable='executable',
prefix="prefix",
exec_prefix="exec_prefix",
base_executable=None,
base_prefix=None,
base_exec_prefix=None)
self.assertEqual(sys._base_executable, "executable")
self.assertEqual(sys.base_prefix, "prefix")
self.assertEqual(sys.base_exec_prefix, "exec_prefix")
def test_path(self):
self.set_config(module_search_paths_set=1,
module_search_paths=['a', 'b', 'c'])

4
Programs/_testembed.c
View File

@ -1547,7 +1547,7 @@ static int tune_config(void)
}
static int test_set_config(void)
static int test_init_set_config(void)
{
// Initialize core
PyConfig config;
@ -1742,7 +1742,7 @@ static struct TestCase TestCases[] = {
{"test_init_setpath_config", test_init_setpath_config},
{"test_init_setpythonhome", test_init_setpythonhome},
{"test_init_warnoptions", test_init_warnoptions},
{"test_init_set_config", test_set_config},
{"test_init_set_config", test_init_set_config},
{"test_run_main", test_run_main},
{"test_get_argc_argv", test_get_argc_argv},

47
Python/initconfig.c
View File

@ -619,15 +619,6 @@ config_check_consistency(const PyConfig *config)
assert(_PyWideStringList_CheckConsistency(&config->warnoptions));
assert(_PyWideStringList_CheckConsistency(&config->module_search_paths));
assert(config->module_search_paths_set >= 0);
if (config->_install_importlib) {
/* don't check config->module_search_paths */
assert(config->executable != NULL);
assert(config->base_executable != NULL);
assert(config->prefix != NULL);
assert(config->base_prefix != NULL);
assert(config->exec_prefix != NULL);
assert(config->base_exec_prefix != NULL);
}
assert(config->platlibdir != NULL);
assert(config->filesystem_encoding != NULL);
assert(config->filesystem_errors != NULL);
@ -1297,24 +1288,15 @@ _PyConfig_FromDict(PyConfig *config, PyObject *dict)
GET_WSTR_OPT(home);
GET_WSTR(platlibdir);
// Path configuration output
GET_UINT(module_search_paths_set);
GET_WSTRLIST(module_search_paths);
if (config->_install_importlib) {
GET_WSTR(executable);
GET_WSTR(base_executable);
GET_WSTR(prefix);
GET_WSTR(base_prefix);
GET_WSTR(exec_prefix);
GET_WSTR(base_exec_prefix);
}
else {
GET_WSTR_OPT(executable);
GET_WSTR_OPT(base_executable);
GET_WSTR_OPT(prefix);
GET_WSTR_OPT(base_prefix);
GET_WSTR_OPT(exec_prefix);
GET_WSTR_OPT(base_exec_prefix);
}
GET_WSTR_OPT(executable);
GET_WSTR_OPT(base_executable);
GET_WSTR_OPT(prefix);
GET_WSTR_OPT(base_prefix);
GET_WSTR_OPT(exec_prefix);
GET_WSTR_OPT(base_exec_prefix);
GET_UINT(skip_source_first_line);
GET_WSTR_OPT(run_command);
@ -2043,7 +2025,7 @@ config_init_fs_encoding(PyConfig *config, const PyPreConfig *preconfig)
static PyStatus
config_read(PyConfig *config)
config_read(PyConfig *config, int compute_path_config)
{
PyStatus status;
const PyPreConfig *preconfig = &_PyRuntime.preconfig;
@ -2087,7 +2069,7 @@ config_read(PyConfig *config)
}
}
if (config->_install_importlib) {
if (compute_path_config && config->_install_importlib) {
status = _PyConfig_InitPathConfig(config);
if (_PyStatus_EXCEPTION(status)) {
return status;
@ -2834,7 +2816,7 @@ PyConfig_SetWideStringList(PyConfig *config, PyWideStringList *list,
The only side effects are to modify config and to call _Py_SetArgcArgv(). */
PyStatus
PyConfig_Read(PyConfig *config)
_PyConfig_Read(PyConfig *config, int compute_path_config)
{
PyStatus status;
@ -2877,7 +2859,7 @@ PyConfig_Read(PyConfig *config)
goto done;
}
status = config_read(config);
status = config_read(config, compute_path_config);
if (_PyStatus_EXCEPTION(status)) {
goto done;
}
@ -2892,6 +2874,13 @@ done:
}
PyStatus
PyConfig_Read(PyConfig *config)
{
return _PyConfig_Read(config, 1);
}
PyObject*
_Py_GetConfigsAsDict(void)
{

59
Python/pylifecycle.c
View File

@ -429,25 +429,20 @@ _Py_SetLocaleFromEnv(int category)
static int
interpreter_set_config(const PyConfig *config)
interpreter_update_config(PyThreadState *tstate, int only_update_path_config)
{
PyThreadState *tstate = PyThreadState_Get();
const PyConfig *config = &tstate->interp->config;
PyStatus status = _PyConfig_Write(config, tstate->interp->runtime);
if (_PyStatus_EXCEPTION(status)) {
_PyErr_SetFromPyStatus(status);
return -1;
if (!only_update_path_config) {
PyStatus status = _PyConfig_Write(config, tstate->interp->runtime);
if (_PyStatus_EXCEPTION(status)) {
_PyErr_SetFromPyStatus(status);
return -1;
}
}
status = _PyConfig_Copy(&tstate->interp->config, config);
if (_PyStatus_EXCEPTION(status)) {
_PyErr_SetFromPyStatus(status);
return -1;
}
config = &tstate->interp->config;
if (config->_install_importlib && _Py_IsMainInterpreter(tstate)) {
status = _PyConfig_WritePathConfig(config);
if (_Py_IsMainInterpreter(tstate)) {
PyStatus status = _PyConfig_WritePathConfig(config);
if (_PyStatus_EXCEPTION(status)) {
_PyErr_SetFromPyStatus(status);
return -1;
@ -465,6 +460,7 @@ interpreter_set_config(const PyConfig *config)
int
_PyInterpreterState_SetConfig(const PyConfig *src_config)
{
PyThreadState *tstate = PyThreadState_Get();
int res = -1;
PyConfig config;
@ -481,7 +477,13 @@ _PyInterpreterState_SetConfig(const PyConfig *src_config)
goto done;
}
res = interpreter_set_config(&config);
status = _PyConfig_Copy(&tstate->interp->config, &config);
if (_PyStatus_EXCEPTION(status)) {
_PyErr_SetFromPyStatus(status);
goto done;
}
res = interpreter_update_config(tstate, 0);
done:
PyConfig_Clear(&config);
@ -763,13 +765,6 @@ pycore_init_import_warnings(PyThreadState *tstate, PyObject *sysmod)
const PyConfig *config = _PyInterpreterState_GetConfig(tstate->interp);
if (config->_install_importlib) {
if (_Py_IsMainInterpreter(tstate)) {
status = _PyConfig_WritePathConfig(config);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
}
/* This call sets up builtin and frozen import support */
status = init_importlib(tstate, sysmod);
if (_PyStatus_EXCEPTION(status)) {
@ -985,7 +980,9 @@ pyinit_core(_PyRuntimeState *runtime,
goto done;
}
status = PyConfig_Read(&config);
// Read the configuration, but don't compute the path configuration
// (it is computed in the main init).
status = _PyConfig_Read(&config, 0);
if (_PyStatus_EXCEPTION(status)) {
goto done;
}
@ -1012,8 +1009,8 @@ done:
static PyStatus
pyinit_main_reconfigure(PyThreadState *tstate)
{
if (_PySys_UpdateConfig(tstate) < 0) {
return _PyStatus_ERR("fail to update sys for the new conf");
if (interpreter_update_config(tstate, 0) < 0) {
return _PyStatus_ERR("fail to reconfigure Python");
}
return _PyStatus_OK();
}
@ -1041,14 +1038,20 @@ init_interp_main(PyThreadState *tstate)
return _PyStatus_OK();
}
// Compute the path configuration
status = _PyConfig_InitPathConfig(&interp->config);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
if (is_main_interp) {
if (_PyTime_Init() < 0) {
return _PyStatus_ERR("can't initialize time");
}
}
if (_PySys_UpdateConfig(tstate) < 0) {
return _PyStatus_ERR("can't finish initializing sys");
if (interpreter_update_config(tstate, 1) < 0) {
return _PyStatus_ERR("failed to update the Python config");
}
status = init_importlib_external(tstate);

22
Python/sysmodule.c
View File

@ -2922,17 +2922,22 @@ _PySys_UpdateConfig(PyThreadState *tstate)
#define SET_SYS_FROM_WSTR(KEY, VALUE) \
SET_SYS(KEY, PyUnicode_FromWideChar(VALUE, -1));
#define COPY_WSTR(SYS_ATTR, WSTR) \
if (WSTR != NULL) { \
SET_SYS_FROM_WSTR(SYS_ATTR, WSTR); \
}
if (config->module_search_paths_set) {
COPY_LIST("path", config->module_search_paths);
}
SET_SYS_FROM_WSTR("executable", config->executable);
SET_SYS_FROM_WSTR("_base_executable", config->base_executable);
SET_SYS_FROM_WSTR("prefix", config->prefix);
SET_SYS_FROM_WSTR("base_prefix", config->base_prefix);
SET_SYS_FROM_WSTR("exec_prefix", config->exec_prefix);
SET_SYS_FROM_WSTR("base_exec_prefix", config->base_exec_prefix);
SET_SYS_FROM_WSTR("platlibdir", config->platlibdir);
COPY_WSTR("executable", config->executable);
COPY_WSTR("_base_executable", config->base_executable);
COPY_WSTR("prefix", config->prefix);
COPY_WSTR("base_prefix", config->base_prefix);
COPY_WSTR("exec_prefix", config->exec_prefix);
COPY_WSTR("base_exec_prefix", config->base_exec_prefix);
COPY_WSTR("platlibdir", config->platlibdir);
if (config->pycache_prefix != NULL) {
SET_SYS_FROM_WSTR("pycache_prefix", config->pycache_prefix);
@ -2946,8 +2951,9 @@ _PySys_UpdateConfig(PyThreadState *tstate)
SET_SYS("_xoptions", sys_create_xoptions_dict(config));
#undef COPY_LIST
#undef SET_SYS_FROM_WSTR
#undef COPY_LIST
#undef COPY_WSTR
// sys.flags
PyObject *flags = _PySys_GetObject(tstate, "flags"); // borrowed ref