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bpo-38234: Remove _PyPathConfig.dll_path (GH-16307)

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The DLL path is not computed from any user configuration and cannot
be configured by PyConfig. Instead, add a new _Py_dll_path global variable.

Remove _PyConfig_SetPathConfig(): replaced with _PyPathConfig_Init().

Py_Initialize() now longer sets the "global path configuration",
but only initialize _Py_dll_path.
This commit is contained in:
Victor Stinner 2019-09-21 01:02:56 +02:00 • committed by GitHub
parent b1542583be
commit c422167749
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 85 additions and 95 deletions
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105
Python/pathconfig.c
View file

@ -15,6 +15,9 @@ extern "C" {
_PyPathConfig _Py_path_config = _PyPathConfig_INIT;
#ifdef MS_WINDOWS
wchar_t *_Py_dll_path = NULL;
#endif
static int
@ -51,9 +54,6 @@ pathconfig_clear(_PyPathConfig *config)
CLEAR(config->prefix);
CLEAR(config->program_full_path);
CLEAR(config->exec_prefix);
#ifdef MS_WINDOWS
CLEAR(config->dll_path);
#endif
CLEAR(config->module_search_path);
CLEAR(config->home);
CLEAR(config->program_name);
@ -114,47 +114,6 @@ done:
}
PyStatus
_PyPathConfig_SetGlobal(const _PyPathConfig *config)
{
PyStatus status;
_PyPathConfig new_config = _PyPathConfig_INIT;
PyMemAllocatorEx old_alloc;
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
#define COPY_ATTR(ATTR) \
do { \
if (copy_wstr(&new_config.ATTR, config->ATTR) < 0) { \
pathconfig_clear(&new_config); \
status = _PyStatus_NO_MEMORY(); \
goto done; \
} \
} while (0)
COPY_ATTR(program_full_path);
COPY_ATTR(prefix);
COPY_ATTR(exec_prefix);
#ifdef MS_WINDOWS
COPY_ATTR(dll_path);
#endif
COPY_ATTR(module_search_path);
COPY_ATTR(program_name);
COPY_ATTR(home);
COPY_ATTR(base_executable);
pathconfig_clear(&_Py_path_config);
/* Steal new_config strings; don't clear new_config */
_Py_path_config = new_config;
status = _PyStatus_OK();
done:
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
return status;
}
void
_PyPathConfig_ClearGlobal(void)
{
@ -162,6 +121,10 @@ _PyPathConfig_ClearGlobal(void)
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
pathconfig_clear(&_Py_path_config);
#ifdef MS_WINDOWS
PyMem_RawFree(_Py_dll_path);
_Py_dll_path = NULL;
#endif
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
}
@ -200,12 +163,36 @@ _PyWideStringList_Join(const PyWideStringList *list, wchar_t sep)
/* Set the global path configuration from config. */
PyStatus
_PyConfig_SetPathConfig(const PyConfig *config)
_PyPathConfig_Init(void)
{
#ifdef MS_WINDOWS
if (_Py_dll_path == NULL) {
/* Already set: nothing to do */
return _PyStatus_OK();
}
PyMemAllocatorEx old_alloc;
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
_Py_dll_path = _Py_GetDLLPath();
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
if (_Py_dll_path == NULL) {
return _PyStatus_NO_MEMORY();
}
#endif
return _PyStatus_OK();
}
static PyStatus
pathconfig_global_init_from_config(const PyConfig *config)
{
PyStatus status;
PyMemAllocatorEx old_alloc;
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
_PyPathConfig pathconfig = _PyPathConfig_INIT;
pathconfig.module_search_path = _PyWideStringList_Join(&config->module_search_paths, DELIM);
@ -222,12 +209,6 @@ _PyConfig_SetPathConfig(const PyConfig *config)
if (copy_wstr(&pathconfig.exec_prefix, config->exec_prefix) < 0) {
goto no_memory;
}
#ifdef MS_WINDOWS
pathconfig.dll_path = _Py_GetDLLPath();
if (pathconfig.dll_path == NULL) {
goto no_memory;
}
#endif
if (copy_wstr(&pathconfig.program_name, config->program_name) < 0) {
goto no_memory;
}
@ -238,19 +219,18 @@ _PyConfig_SetPathConfig(const PyConfig *config)
goto no_memory;
}
status = _PyPathConfig_SetGlobal(&pathconfig);
if (_PyStatus_EXCEPTION(status)) {
goto done;
}
pathconfig_clear(&_Py_path_config);
/* Steal new_config strings; don't clear new_config */
_Py_path_config = pathconfig;
status = _PyStatus_OK();
goto done;
no_memory:
pathconfig_clear(&pathconfig);
status = _PyStatus_NO_MEMORY();
done:
pathconfig_clear(&pathconfig);
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
return status;
}
@ -402,12 +382,17 @@ _PyConfig_InitPathConfig(PyConfig *config)
static void
pathconfig_global_init(void)
{
/* Initialize _Py_dll_path if needed */
PyStatus status = _PyPathConfig_Init();
if (_PyStatus_EXCEPTION(status)) {
Py_ExitStatusException(status);
}
if (_Py_path_config.module_search_path != NULL) {
/* Already initialized */
return;
}
PyStatus status;
PyConfig config;
_PyConfig_InitCompatConfig(&config);
@ -416,7 +401,7 @@ pathconfig_global_init(void)
goto error;
}
status = _PyConfig_SetPathConfig(&config);
status = pathconfig_global_init_from_config(&config);
if (_PyStatus_EXCEPTION(status)) {
goto error;
}
@ -450,10 +435,6 @@ Py_SetPath(const wchar_t *path)
alloc_error |= (new_config.prefix == NULL);
new_config.exec_prefix = _PyMem_RawWcsdup(L"");
alloc_error |= (new_config.exec_prefix == NULL);
#ifdef MS_WINDOWS
new_config.dll_path = _Py_GetDLLPath();
alloc_error |= (new_config.dll_path == NULL);
#endif
new_config.module_search_path = _PyMem_RawWcsdup(path);
alloc_error |= (new_config.module_search_path == NULL);

4
Python/pylifecycle.c
View file

@ -475,7 +475,7 @@ pyinit_core_reconfigure(_PyRuntimeState *runtime,
config = &interp->config;
if (config->_install_importlib) {
status = _PyConfig_SetPathConfig(config);
status = _PyPathConfig_Init();
if (_PyStatus_EXCEPTION(status)) {
return status;
}
@ -646,7 +646,7 @@ pycore_init_import_warnings(PyThreadState *tstate, PyObject *sysmod)
}
if (config->_install_importlib) {
status = _PyConfig_SetPathConfig(config);
status = _PyPathConfig_Init();
if (_PyStatus_EXCEPTION(status)) {
return status;
}