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bpo-35713: Split _Py_InitializeCore into subfunctions (GH-11650)
* Split _Py_InitializeCore_impl() into subfunctions: add multiple pycore_init_xxx() functions * Preliminary sys.stderr is now set earlier to get an usable sys.stderr ealier. * Move code into _Py_Initialize_ReconfigureCore() to be able to call it from _Py_InitializeCore(). * Split _PyExc_Init(): create a new _PyBuiltins_AddExceptions() function. * Call _PyExc_Init() earlier in _Py_InitializeCore_impl() and new_interpreter() to get working exceptions earlier. * _Py_ReadyTypes() now returns _PyInitError rather than calling Py_FatalError(). * Misc code cleanup
1 parent 28f6cb3 commit 6d43f6f

9 files changed

Lines changed: 325 additions & 333 deletions

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‎Include/internal/pycore_pylifecycle.h‎

Lines changed: 3 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -30,12 +30,13 @@ extern PyObject * _PyBuiltin_Init(void);
3030
extern _PyInitError _PySys_BeginInit(PyObject **sysmod);
3131
extern int _PySys_EndInit(PyObject *sysdict, PyInterpreterState *interp);
3232
extern _PyInitError _PyImport_Init(PyInterpreterState *interp);
33-
extern _PyInitError _PyExc_Init(PyObject * bltinmod);
33+
extern _PyInitError _PyExc_Init(void);
34+
extern _PyInitError _PyBuiltins_AddExceptions(PyObject * bltinmod);
3435
extern _PyInitError _PyImportHooks_Init(void);
3536
extern int _PyFloat_Init(void);
3637
extern _PyInitError _Py_HashRandomization_Init(const _PyCoreConfig *);
3738

38-
extern void _Py_ReadyTypes(void);
39+
extern _PyInitError _Py_ReadyTypes(void);
3940

4041
/* Various internal finalizers */
4142

‎Misc/NEWS.d/next/Core and Builtins/2019-01-22-18-50-21.bpo-35713.bTeUsa.rst‎

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,2 @@
1+
Reorganize Python initialization to get working exceptions and sys.stderr
2+
earlier.

‎Objects/exceptions.c‎

Lines changed: 63 additions & 51 deletions
Original file line numberDiff line numberDiff line change
@@ -2492,7 +2492,7 @@ SimpleExtendsException(PyExc_Warning, ResourceWarning,
24922492
#endif /* MS_WINDOWS */
24932493

24942494
_PyInitError
2495-
_PyExc_Init(PyObject *bltinmod)
2495+
_PyExc_Init(void)
24962496
{
24972497
#define PRE_INIT(TYPE) \
24982498
if (!(_PyExc_ ## TYPE.tp_flags & Py_TPFLAGS_READY)) { \
@@ -2502,21 +2502,6 @@ _PyExc_Init(PyObject *bltinmod)
25022502
Py_INCREF(PyExc_ ## TYPE); \
25032503
}
25042504

2505-
#define POST_INIT(TYPE) \
2506-
if (PyDict_SetItemString(bdict, # TYPE, PyExc_ ## TYPE)) { \
2507-
return _Py_INIT_ERR("Module dictionary insertion problem."); \
2508-
}
2509-
2510-
#define INIT_ALIAS(NAME, TYPE) \
2511-
do { \
2512-
Py_INCREF(PyExc_ ## TYPE); \
2513-
Py_XDECREF(PyExc_ ## NAME); \
2514-
PyExc_ ## NAME = PyExc_ ## TYPE; \
2515-
if (PyDict_SetItemString(bdict, # NAME, PyExc_ ## NAME)) { \
2516-
return _Py_INIT_ERR("Module dictionary insertion problem."); \
2517-
} \
2518-
} while (0)
2519-
25202505
#define ADD_ERRNO(TYPE, CODE) \
25212506
do { \
25222507
PyObject *_code = PyLong_FromLong(CODE); \
@@ -2526,8 +2511,6 @@ _PyExc_Init(PyObject *bltinmod)
25262511
Py_DECREF(_code); \
25272512
} while (0)
25282513

2529-
PyObject *bdict;
2530-
25312514
PRE_INIT(BaseException);
25322515
PRE_INIT(Exception);
25332516
PRE_INIT(TypeError);
@@ -2596,6 +2579,68 @@ _PyExc_Init(PyObject *bltinmod)
25962579
PRE_INIT(ProcessLookupError);
25972580
PRE_INIT(TimeoutError);
25982581

2582+
if (preallocate_memerrors() < 0) {
2583+
return _Py_INIT_ERR("Could not preallocate MemoryError object");
2584+
}
2585+
2586+
/* Add exceptions to errnomap */
2587+
if (!errnomap) {
2588+
errnomap = PyDict_New();
2589+
if (!errnomap) {
2590+
return _Py_INIT_ERR("Cannot allocate map from errnos to OSError subclasses");
2591+
}
2592+
}
2593+
2594+
ADD_ERRNO(BlockingIOError, EAGAIN);
2595+
ADD_ERRNO(BlockingIOError, EALREADY);
2596+
ADD_ERRNO(BlockingIOError, EINPROGRESS);
2597+
ADD_ERRNO(BlockingIOError, EWOULDBLOCK);
2598+
ADD_ERRNO(BrokenPipeError, EPIPE);
2599+
#ifdef ESHUTDOWN
2600+
ADD_ERRNO(BrokenPipeError, ESHUTDOWN);
2601+
#endif
2602+
ADD_ERRNO(ChildProcessError, ECHILD);
2603+
ADD_ERRNO(ConnectionAbortedError, ECONNABORTED);
2604+
ADD_ERRNO(ConnectionRefusedError, ECONNREFUSED);
2605+
ADD_ERRNO(ConnectionResetError, ECONNRESET);
2606+
ADD_ERRNO(FileExistsError, EEXIST);
2607+
ADD_ERRNO(FileNotFoundError, ENOENT);
2608+
ADD_ERRNO(IsADirectoryError, EISDIR);
2609+
ADD_ERRNO(NotADirectoryError, ENOTDIR);
2610+
ADD_ERRNO(InterruptedError, EINTR);
2611+
ADD_ERRNO(PermissionError, EACCES);
2612+
ADD_ERRNO(PermissionError, EPERM);
2613+
ADD_ERRNO(ProcessLookupError, ESRCH);
2614+
ADD_ERRNO(TimeoutError, ETIMEDOUT);
2615+
2616+
return _Py_INIT_OK();
2617+
2618+
#undef PRE_INIT
2619+
#undef ADD_ERRNO
2620+
}
2621+
2622+
2623+
/* Add exception types to the builtins module */
2624+
_PyInitError
2625+
_PyBuiltins_AddExceptions(PyObject *bltinmod)
2626+
{
2627+
#define POST_INIT(TYPE) \
2628+
if (PyDict_SetItemString(bdict, # TYPE, PyExc_ ## TYPE)) { \
2629+
return _Py_INIT_ERR("Module dictionary insertion problem."); \
2630+
}
2631+
2632+
#define INIT_ALIAS(NAME, TYPE) \
2633+
do { \
2634+
Py_INCREF(PyExc_ ## TYPE); \
2635+
Py_XDECREF(PyExc_ ## NAME); \
2636+
PyExc_ ## NAME = PyExc_ ## TYPE; \
2637+
if (PyDict_SetItemString(bdict, # NAME, PyExc_ ## NAME)) { \
2638+
return _Py_INIT_ERR("Module dictionary insertion problem."); \
2639+
} \
2640+
} while (0)
2641+
2642+
PyObject *bdict;
2643+
25992644
bdict = PyModule_GetDict(bltinmod);
26002645
if (bdict == NULL) {
26012646
return _Py_INIT_ERR("exceptions bootstrapping error.");
@@ -2656,61 +2701,28 @@ _PyExc_Init(PyObject *bltinmod)
26562701
POST_INIT(BytesWarning);
26572702
POST_INIT(ResourceWarning);
26582703

2659-
if (!errnomap) {
2660-
errnomap = PyDict_New();
2661-
if (!errnomap) {
2662-
return _Py_INIT_ERR("Cannot allocate map from errnos to OSError subclasses");
2663-
}
2664-
}
2665-
26662704
/* OSError subclasses */
26672705
POST_INIT(ConnectionError);
26682706

26692707
POST_INIT(BlockingIOError);
2670-
ADD_ERRNO(BlockingIOError, EAGAIN);
2671-
ADD_ERRNO(BlockingIOError, EALREADY);
2672-
ADD_ERRNO(BlockingIOError, EINPROGRESS);
2673-
ADD_ERRNO(BlockingIOError, EWOULDBLOCK);
26742708
POST_INIT(BrokenPipeError);
2675-
ADD_ERRNO(BrokenPipeError, EPIPE);
2676-
#ifdef ESHUTDOWN
2677-
ADD_ERRNO(BrokenPipeError, ESHUTDOWN);
2678-
#endif
26792709
POST_INIT(ChildProcessError);
2680-
ADD_ERRNO(ChildProcessError, ECHILD);
26812710
POST_INIT(ConnectionAbortedError);
2682-
ADD_ERRNO(ConnectionAbortedError, ECONNABORTED);
26832711
POST_INIT(ConnectionRefusedError);
2684-
ADD_ERRNO(ConnectionRefusedError, ECONNREFUSED);
26852712
POST_INIT(ConnectionResetError);
2686-
ADD_ERRNO(ConnectionResetError, ECONNRESET);
26872713
POST_INIT(FileExistsError);
2688-
ADD_ERRNO(FileExistsError, EEXIST);
26892714
POST_INIT(FileNotFoundError);
2690-
ADD_ERRNO(FileNotFoundError, ENOENT);
26912715
POST_INIT(IsADirectoryError);
2692-
ADD_ERRNO(IsADirectoryError, EISDIR);
26932716
POST_INIT(NotADirectoryError);
2694-
ADD_ERRNO(NotADirectoryError, ENOTDIR);
26952717
POST_INIT(InterruptedError);
2696-
ADD_ERRNO(InterruptedError, EINTR);
26972718
POST_INIT(PermissionError);
2698-
ADD_ERRNO(PermissionError, EACCES);
2699-
ADD_ERRNO(PermissionError, EPERM);
27002719
POST_INIT(ProcessLookupError);
2701-
ADD_ERRNO(ProcessLookupError, ESRCH);
27022720
POST_INIT(TimeoutError);
2703-
ADD_ERRNO(TimeoutError, ETIMEDOUT);
27042721

2705-
if (preallocate_memerrors() < 0) {
2706-
return _Py_INIT_ERR("Could not preallocate MemoryError object");
2707-
}
27082722
return _Py_INIT_OK();
27092723

2710-
#undef PRE_INIT
27112724
#undef POST_INIT
27122725
#undef INIT_ALIAS
2713-
#undef ADD_ERRNO
27142726
}
27152727

27162728
void

‎Objects/fileobject.c‎

Lines changed: 6 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -359,6 +359,9 @@ stdprinter_write(PyStdPrinter_Object *self, PyObject *args)
359359
Py_ssize_t n;
360360
int err;
361361

362+
/* The function can clear the current exception */
363+
assert(!PyErr_Occurred());
364+
362365
if (self->fd < 0) {
363366
/* fd might be invalid on Windows
364367
* I can't raise an exception here. It may lead to an
@@ -367,10 +370,11 @@ stdprinter_write(PyStdPrinter_Object *self, PyObject *args)
367370
Py_RETURN_NONE;
368371
}
369372

370-
if (!PyArg_ParseTuple(args, "U", &unicode))
373+
if (!PyArg_ParseTuple(args, "U", &unicode)) {
371374
return NULL;
375+
}
372376

373-
/* encode Unicode to UTF-8 */
377+
/* Encode Unicode to UTF-8/surrogateescape */
374378
str = PyUnicode_AsUTF8AndSize(unicode, &n);
375379
if (str == NULL) {
376380
PyErr_Clear();

‎Objects/floatobject.c‎

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1999,8 +1999,9 @@ _PyFloat_Init(void)
19991999

20002000
/* Init float info */
20012001
if (FloatInfoType.tp_name == NULL) {
2002-
if (PyStructSequence_InitType2(&FloatInfoType, &floatinfo_desc) < 0)
2002+
if (PyStructSequence_InitType2(&FloatInfoType, &floatinfo_desc) < 0) {
20032003
return 0;
2004+
}
20042005
}
20052006
return 1;
20062007
}

‎Objects/longobject.c‎

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -5635,8 +5635,9 @@ _PyLong_Init(void)
56355635

56365636
/* initialize int_info */
56375637
if (Int_InfoType.tp_name == NULL) {
5638-
if (PyStructSequence_InitType2(&Int_InfoType, &int_info_desc) < 0)
5638+
if (PyStructSequence_InitType2(&Int_InfoType, &int_info_desc) < 0) {
56395639
return 0;
5640+
}
56405641
}
56415642

56425643
return 1;

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