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bpo-32030: Add _PyMainInterpreterConfig.pythonhome (#4513)

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* Py_Main() now reads the PYTHONHOME environment variable
* Add _Py_GetPythonHomeWithConfig() private function
* Add _PyWarnings_InitWithConfig()
* init_filters() doesn't get the current core configuration from the
  current interpreter or Python thread anymore. Pass explicitly the
  configuration to _PyWarnings_InitWithConfig().
* _Py_InitializeCore() now fails on _PyWarnings_InitWithConfig()
  failure.
* Pass configuration as constant
This commit is contained in:
Victor Stinner 2017-11-23 10:43:14 +01:00 • committed by GitHub
parent e32e79f7d8
commit 1f15111a6e
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8 changed files with 136 additions and 43 deletions
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51
Python/pylifecycle.c
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@ -767,7 +767,9 @@ _Py_InitializeCore(const _PyCoreConfig *config)
}
/* Initialize _warnings. */
_PyWarnings_Init();
if (_PyWarnings_InitWithConfig(&interp->core_config) == NULL) {
return _Py_INIT_ERR("can't initialize warnings");
}
/* This call sets up builtin and frozen import support */
if (!interp->core_config._disable_importlib) {
@ -880,7 +882,7 @@ _Py_InitializeMainInterpreter(const _PyMainInterpreterConfig *config)
return err;
}
if (config->install_signal_handlers) {
if (interp->config.install_signal_handlers) {
err = initsigs(); /* Signal handling stuff, including initintr() */
if (_Py_INIT_FAILED(err)) {
return err;
@ -1468,7 +1470,6 @@ Py_GetProgramName(void)
}
static wchar_t *default_home = NULL;
static wchar_t env_home[MAXPATHLEN+1];
void
Py_SetPythonHome(wchar_t *home)
@ -1476,21 +1477,41 @@ Py_SetPythonHome(wchar_t *home)
default_home = home;
}
wchar_t *
_Py_GetPythonHomeWithConfig(const _PyMainInterpreterConfig *config)
{
/* Use a static buffer to avoid heap memory allocation failure.
Py_GetPythonHome() doesn't allow to report error, and the caller
doesn't release memory. */
static wchar_t buffer[MAXPATHLEN+1];
if (default_home) {
return default_home;
}
if (config) {
return config->pythonhome;
}
char *home = Py_GETENV("PYTHONHOME");
if (!home) {
return NULL;
}
size_t size = Py_ARRAY_LENGTH(buffer);
size_t r = mbstowcs(buffer, home, size);
if (r == (size_t)-1 || r >= size) {
/* conversion failed or the static buffer is too small */
return NULL;
}
return buffer;
}
wchar_t *
Py_GetPythonHome(void)
{
wchar_t *home = default_home;
if (home == NULL && !Py_IgnoreEnvironmentFlag) {
char* chome = Py_GETENV("PYTHONHOME");
if (chome) {
size_t size = Py_ARRAY_LENGTH(env_home);
size_t r = mbstowcs(env_home, chome, size);
if (r != (size_t)-1 && r < size)
home = env_home;
}
}
return home;
return _Py_GetPythonHomeWithConfig(NULL);
}
/* Add the __main__ module */