bpo-34170: _PyCoreConfig_Read() leaves Py_IsolatedFlag unchanged (GH-8361)
* _PyCoreConfig_Read() no longer directly modifies Py_IsolatedFlag
and Py_NoSiteFlag global configuration flags. The function now
requires two pointers to integer, so these flags can be set later,
to avoid side effets in _PyCoreConfig_Read().
* pathconfig_global_init() now leaves Py_IsolatedFlag and
Py_NoSiteFlag unchanged.
* Fix pathconfig_global_init(): avoid computing the path
configuration twice, use _PyCoreConfig_SetPathConfig().
diff --git a/Include/internal/pystate.h b/Include/internal/pystate.h
index 83fa7dc..6cee272 100644
--- a/Include/internal/pystate.h
+++ b/Include/internal/pystate.h
@@ -52,9 +52,17 @@
wchar_t *program_name;
/* Set by Py_SetPythonHome() or PYTHONHOME environment variable */
wchar_t *home;
+ /* isolated and no_site_import are used to set Py_IsolatedFlag and
+ Py_NoSiteFlag flags on Windows in read_pth_file(). These fields
+ are ignored when their value are equal to -1 (unset). */
+ int isolated;
+ int no_site_import;
} _PyPathConfig;
-#define _PyPathConfig_INIT {.module_search_path = NULL}
+#define _PyPathConfig_INIT \
+ {.module_search_path = NULL, \
+ .isolated = -1, \
+ .no_site_import = -1}
/* Note: _PyPathConfig_INIT sets other fields to 0/NULL */
PyAPI_DATA(_PyPathConfig) _Py_path_config;