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bpo-40910: Export Py_GetArgcArgv() function (GH-20721) 

Export explicitly the Py_GetArgcArgv() function to the C API and
document the function. Previously, it was exported implicitly which
no longer works since Python is built with -fvisibility=hidden.

* Add PyConfig._orig_argv member.
* Py_InitializeFromConfig() no longer calls _PyConfig_Write() twice.
* PyConfig_Read() no longer initializes Py_GetArgcArgv(): it is now
  _PyConfig_Write() responsibility.
* _PyConfig_Write() result type becomes PyStatus instead of void.
* Write an unit test on Py_GetArgcArgv().
This commit is contained in:
Victor Stinner 2020-06-08 18:12:59 +02:00 committed by GitHub
parent 8f023a2f66
commit e81f6e687d
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GPG Key ID: 4AEE18F83AFDEB23
10 changed files with 131 additions and 22 deletions
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9
Doc/c-api/init_config.rst
View File

@ -43,6 +43,7 @@ Functions:
* :c:func:`Py_PreInitializeFromArgs`
* :c:func:`Py_PreInitializeFromBytesArgs`
* :c:func:`Py_RunMain`
* :c:func:`Py_GetArgcArgv`
The preconfiguration (``PyPreConfig`` type) is stored in
``_PyRuntime.preconfig`` and the configuration (``PyConfig`` type) is stored in
@ -984,6 +985,14 @@ customized Python always running in isolated mode using
:c:func:`Py_RunMain`.
Py_GetArgcArgv()
----------------
.. c:function:: void Py_GetArgcArgv(int *argc, wchar_t ***argv)
Get the original command line arguments, before Python modified them.
Multi-Phase Initialization Private Provisional API
--------------------------------------------------

16
Include/cpython/initconfig.h
View File

@ -411,6 +411,14 @@ typedef struct {
/* If non-zero, disallow threads, subprocesses, and fork.
Default: 0. */
int _isolated_interpreter;
/* Original command line arguments. If _orig_argv is empty and _argv is
not equal to [''], PyConfig_Read() copies the configuration 'argv' list
into '_orig_argv' list before modifying 'argv' list (if parse_argv
is non-zero).
_PyConfig_Write() initializes Py_GetArgcArgv() to this list. */
PyWideStringList _orig_argv;
} PyConfig;
PyAPI_FUNC(void) PyConfig_InitPythonConfig(PyConfig *config);
@ -436,5 +444,13 @@ PyAPI_FUNC(PyStatus) PyConfig_SetWideStringList(PyConfig *config,
PyWideStringList *list,
Py_ssize_t length, wchar_t **items);
/* --- Helper functions --------------------------------------- */
/* Get the original command line arguments, before Python modified them.
See also PyConfig._orig_argv. */
PyAPI_FUNC(void) Py_GetArgcArgv(int *argc, wchar_t ***argv);
#endif /* !Py_LIMITED_API */
#endif /* !Py_PYCORECONFIG_H */

2
Include/internal/pycore_initconfig.h
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@ -150,7 +150,7 @@ extern PyStatus _PyConfig_Copy(
PyConfig *config,
const PyConfig *config2);
extern PyStatus _PyConfig_InitPathConfig(PyConfig *config);
extern void _PyConfig_Write(const PyConfig *config,
extern PyStatus _PyConfig_Write(const PyConfig *config,
struct pyruntimestate *runtime);
extern PyStatus _PyConfig_SetPyArgv(
PyConfig *config,

34
Lib/test/test_embed.py
View File

@ -366,6 +366,7 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
'program_name': GET_DEFAULT_CONFIG,
'parse_argv': 0,
'argv': [""],
'_orig_argv': [],
'xoptions': [],
'warnoptions': [],
@ -739,7 +740,12 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
'pycache_prefix': 'conf_pycache_prefix',
'program_name': './conf_program_name',
'argv': ['-c', 'arg2', ],
'argv': ['-c', 'arg2'],
'_orig_argv': ['python3',
'-W', 'cmdline_warnoption',
'-X', 'cmdline_xoption',
'-c', 'pass',
'arg2'],
'parse_argv': 1,
'xoptions': [
'config_xoption1=3',
@ -872,6 +878,7 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
}
config = {
'argv': ['script.py'],
'_orig_argv': ['python3', '-X', 'dev', 'script.py'],
'run_filename': os.path.abspath('script.py'),
'dev_mode': 1,
'faulthandler': 1,
@ -886,9 +893,14 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
preconfig = {
'isolated': 0,
}
argv = ["python3",
"-E", "-I",
"-X", "dev",
"-X", "utf8",
"script.py"]
config = {
'argv': ["python3", "-E", "-I",
"-X", "dev", "-X", "utf8", "script.py"],
'argv': argv,
'_orig_argv': argv,
'isolated': 0,
}
self.check_all_configs("test_preinit_dont_parse_argv", config, preconfig,
@ -967,6 +979,9 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
'ignore:::sysadd_warnoption',
'ignore:::config_warnoption',
],
'_orig_argv': ['python3',
'-W', 'ignore:::cmdline_warnoption',
'-X', 'cmdline_xoption'],
}
self.check_all_configs("test_init_sys_add", config, api=API_PYTHON)
@ -975,6 +990,7 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
'print(json.dumps(_testinternalcapi.get_configs()))')
config = {
'argv': ['-c', 'arg2'],
'_orig_argv': ['python3', '-c', code, 'arg2'],
'program_name': './python3',
'run_command': code + '\n',
'parse_argv': 1,
@ -986,6 +1002,9 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
'print(json.dumps(_testinternalcapi.get_configs()))')
config = {
'argv': ['-c', 'arg2'],
'_orig_argv': ['python3',
'-c', code,
'arg2'],
'program_name': './python3',
'run_command': code + '\n',
'parse_argv': 1,
@ -999,6 +1018,7 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
config = {
'parse_argv': 1,
'argv': ['-c', 'arg1', '-v', 'arg3'],
'_orig_argv': ['./argv0', '-E', '-c', 'pass', 'arg1', '-v', 'arg3'],
'program_name': './argv0',
'run_command': 'pass\n',
'use_environment': 0,
@ -1012,6 +1032,7 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
config = {
'parse_argv': 0,
'argv': ['./argv0', '-E', '-c', 'pass', 'arg1', '-v', 'arg3'],
'_orig_argv': ['./argv0', '-E', '-c', 'pass', 'arg1', '-v', 'arg3'],
'program_name': './argv0',
}
self.check_all_configs("test_init_dont_parse_argv", config, pre_config,
@ -1299,10 +1320,17 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
'faulthandler': 1,
'bytes_warning': 1,
'warnoptions': warnoptions,
'_orig_argv': ['python3',
'-Wignore:::cmdline1',
'-Wignore:::cmdline2'],
}
self.check_all_configs("test_init_warnoptions", config, preconfig,
api=API_PYTHON)
def test_get_argc_argv(self):
self.run_embedded_interpreter("test_get_argc_argv")
# ignore output
class AuditingTests(EmbeddingTestsMixin, unittest.TestCase):
def test_open_code_hook(self):

3
Misc/NEWS.d/next/C API/2020-06-08-15-59-06.bpo-40910.L56oI0.rst Normal file
View File

@ -0,0 +1,3 @@
Export explicitly the :c:func:`Py_GetArgcArgv` function to the C API and
document the function. Previously, it was exported implicitly which no
longer works since Python is built with ``-fvisibility=hidden``.

1
PC/python3.def
View File

@ -734,6 +734,7 @@ EXPORTS
Py_FinalizeEx=python310.Py_FinalizeEx
Py_GenericAlias=python310.Py_GenericAlias
Py_GenericAliasType=python310.Py_GenericAliasType
Py_GetArgcArgv=python310.Py_GetArgcArgv
Py_GetBuildInfo=python310.Py_GetBuildInfo
Py_GetCompiler=python310.Py_GetCompiler
Py_GetCopyright=python310.Py_GetCopyright

42
Programs/_testembed.c
View File

@ -1334,6 +1334,7 @@ static int test_init_read_set(void)
return 0;
fail:
PyConfig_Clear(&config);
Py_ExitStatusException(status);
}
@ -1592,6 +1593,46 @@ static int test_run_main(void)
}
static int test_get_argc_argv(void)
{
PyConfig config;
PyConfig_InitPythonConfig(&config);
wchar_t *argv[] = {L"python3", L"-c",
(L"import sys; "
L"print(f'Py_RunMain(): sys.argv={sys.argv}')"),
L"arg2"};
config_set_argv(&config, Py_ARRAY_LENGTH(argv), argv);
config_set_string(&config, &config.program_name, L"./python3");
// Calling PyConfig_Read() twice must not change Py_GetArgcArgv() result.
// The second call is done by Py_InitializeFromConfig().
PyStatus status = PyConfig_Read(&config);
if (PyStatus_Exception(status)) {
PyConfig_Clear(&config);
Py_ExitStatusException(status);
}
init_from_config_clear(&config);
int get_argc;
wchar_t **get_argv;
Py_GetArgcArgv(&get_argc, &get_argv);
printf("argc: %i\n", get_argc);
assert(get_argc == Py_ARRAY_LENGTH(argv));
for (int i=0; i < get_argc; i++) {
printf("argv[%i]: %ls\n", i, get_argv[i]);
assert(wcscmp(get_argv[i], argv[i]) == 0);
}
Py_Finalize();
printf("\n");
printf("test ok\n");
return 0;
}
/* *********************************************************
* List of test cases and the function that implements it.
*
@ -1649,6 +1690,7 @@ static struct TestCase TestCases[] = {
{"test_init_setpythonhome", test_init_setpythonhome},
{"test_init_warnoptions", test_init_warnoptions},
{"test_run_main", test_run_main},
{"test_get_argc_argv", test_get_argc_argv},
{"test_open_code_hook", test_open_code_hook},
{"test_audit", test_audit},

28
Python/initconfig.c
View File

@ -548,8 +548,6 @@ _Py_SetArgcArgv(Py_ssize_t argc, wchar_t * const *argv)
}
/* Make the *original* argc/argv available to other modules.
This is rare, but it is needed by the secureware extension. */
void
Py_GetArgcArgv(int *argc, wchar_t ***argv)
{
@ -859,6 +857,7 @@ _PyConfig_Copy(PyConfig *config, const PyConfig *config2)
COPY_ATTR(pathconfig_warnings);
COPY_ATTR(_init_main);
COPY_ATTR(_isolated_interpreter);
COPY_WSTRLIST(_orig_argv);
#undef COPY_ATTR
#undef COPY_WSTR_ATTR
@ -960,6 +959,7 @@ config_as_dict(const PyConfig *config)
SET_ITEM_INT(pathconfig_warnings);
SET_ITEM_INT(_init_main);
SET_ITEM_INT(_isolated_interpreter);
SET_ITEM_WSTRLIST(_orig_argv);
return dict;
@ -1856,7 +1856,7 @@ config_init_stdio(const PyConfig *config)
- set Py_xxx global configuration variables
- initialize C standard streams (stdin, stdout, stderr) */
void
PyStatus
_PyConfig_Write(const PyConfig *config, _PyRuntimeState *runtime)
{
config_set_global_vars(config);
@ -1870,6 +1870,13 @@ _PyConfig_Write(const PyConfig *config, _PyRuntimeState *runtime)
preconfig->isolated = config->isolated;
preconfig->use_environment = config->use_environment;
preconfig->dev_mode = config->dev_mode;
if (_Py_SetArgcArgv(config->_orig_argv.length,
config->_orig_argv.items) < 0)
{
return _PyStatus_NO_MEMORY();
}
return _PyStatus_OK();
}
@ -2493,7 +2500,6 @@ PyStatus
PyConfig_Read(PyConfig *config)
{
PyStatus status;
PyWideStringList orig_argv = _PyWideStringList_INIT;
status = _Py_PreInitializeFromConfig(config, NULL);
if (_PyStatus_EXCEPTION(status)) {
@ -2502,9 +2508,14 @@ PyConfig_Read(PyConfig *config)
config_get_global_vars(config);
if (_PyWideStringList_Copy(&orig_argv, &config->argv) < 0) {
if (config->_orig_argv.length == 0
&& !(config->argv.length == 1
&& wcscmp(config->argv.items[0], L"") == 0))
{
if (_PyWideStringList_Copy(&config->_orig_argv, &config->argv) < 0) {
return _PyStatus_NO_MEMORY();
}
}
_PyPreCmdline precmdline = _PyPreCmdline_INIT;
status = core_read_precmdline(config, &precmdline);
@ -2534,11 +2545,6 @@ PyConfig_Read(PyConfig *config)
goto done;
}
if (_Py_SetArgcArgv(orig_argv.length, orig_argv.items) < 0) {
status = _PyStatus_NO_MEMORY();
goto done;
}
/* Check config consistency */
assert(config->isolated >= 0);
assert(config->use_environment >= 0);
@ -2591,11 +2597,11 @@ PyConfig_Read(PyConfig *config)
assert(config->check_hash_pycs_mode != NULL);
assert(config->_install_importlib >= 0);
assert(config->pathconfig_warnings >= 0);
assert(_PyWideStringList_CheckConsistency(&config->_orig_argv));
status = _PyStatus_OK();
done:
_PyWideStringList_Clear(&orig_argv);
_PyPreCmdline_Clear(&precmdline);
return status;
}

14
Python/pylifecycle.c
View File

@ -460,7 +460,10 @@ pyinit_core_reconfigure(_PyRuntimeState *runtime,
return _PyStatus_ERR("can't make main interpreter");
}
_PyConfig_Write(config, runtime);
status = _PyConfig_Write(config, runtime);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
status = _PyInterpreterState_SetConfig(interp, config);
if (_PyStatus_EXCEPTION(status)) {
@ -486,7 +489,10 @@ pycore_init_runtime(_PyRuntimeState *runtime,
return _PyStatus_ERR("main interpreter already initialized");
}
_PyConfig_Write(config, runtime);
PyStatus status = _PyConfig_Write(config, runtime);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
/* Py_Finalize leaves _Py_Finalizing set in order to help daemon
* threads behave a little more gracefully at interpreter shutdown.
@ -499,7 +505,7 @@ pycore_init_runtime(_PyRuntimeState *runtime,
*/
_PyRuntimeState_SetFinalizing(runtime, NULL);
PyStatus status = _Py_HashRandomization_Init(config);
status = _Py_HashRandomization_Init(config);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
@ -746,8 +752,6 @@ pyinit_config(_PyRuntimeState *runtime,
PyThreadState **tstate_p,
const PyConfig *config)
{
_PyConfig_Write(config, runtime);
PyStatus status = pycore_init_runtime(runtime, config);
if (_PyStatus_EXCEPTION(status)) {
return status;