bpo-35713: Reorganize sys module initialization (GH-11658)
https://github.com/python/cpython/commit/ab67281e95de1a88c4379a75a547f19a8ba... commit: ab67281e95de1a88c4379a75a547f19a8ba5ec30 branch: master author: Victor Stinner <vstinner@redhat.com> committer: GitHub <noreply@github.com> date: 2019-01-23T15:04:40+01:00 summary: bpo-35713: Reorganize sys module initialization (GH-11658) * Rename _PySys_BeginInit() to _PySys_InitCore(). * Rename _PySys_EndInit() to _PySys_InitMain(). * Add _PySys_Create(). It calls _PySys_InitCore() which becomes private. * Add _PySys_SetPreliminaryStderr(). * Rename _Py_ReadyTypes() to _PyTypes_Init(). * Misc code cleanup. files: M Include/internal/pycore_pylifecycle.h M Objects/object.c M Python/pylifecycle.c M Python/sysmodule.c diff --git a/Include/internal/pycore_pylifecycle.h b/Include/internal/pycore_pylifecycle.h index 6f5c54422330..acb7391c0a70 100644 --- a/Include/internal/pycore_pylifecycle.h +++ b/Include/internal/pycore_pylifecycle.h @@ -27,8 +27,11 @@ extern int _PyLong_Init(void); extern _PyInitError _PyFaulthandler_Init(int enable); extern int _PyTraceMalloc_Init(int enable); extern PyObject * _PyBuiltin_Init(void); -extern _PyInitError _PySys_BeginInit(PyObject **sysmod); -extern int _PySys_EndInit(PyObject *sysdict, PyInterpreterState *interp); +extern _PyInitError _PySys_Create( + PyInterpreterState *interp, + PyObject **sysmod_p); +extern _PyInitError _PySys_SetPreliminaryStderr(PyObject *sysdict); +extern int _PySys_InitMain(PyInterpreterState *interp); extern _PyInitError _PyImport_Init(PyInterpreterState *interp); extern _PyInitError _PyExc_Init(void); extern _PyInitError _PyBuiltins_AddExceptions(PyObject * bltinmod); @@ -36,7 +39,7 @@ extern _PyInitError _PyImportHooks_Init(void); extern int _PyFloat_Init(void); extern _PyInitError _Py_HashRandomization_Init(const _PyCoreConfig *); -extern _PyInitError _Py_ReadyTypes(void); +extern _PyInitError _PyTypes_Init(void); /* Various internal finalizers */ diff --git a/Objects/object.c b/Objects/object.c index 2171d53523f2..044342f24745 100644 --- a/Objects/object.c +++ b/Objects/object.c @@ -1717,7 +1717,7 @@ PyObject _Py_NotImplementedStruct = { }; _PyInitError -_Py_ReadyTypes(void) +_PyTypes_Init(void) { #define INIT_TYPE(TYPE, NAME) \ do { \ diff --git a/Python/pylifecycle.c b/Python/pylifecycle.c index 86d87fb6030a..5d5ec4a63200 100644 --- a/Python/pylifecycle.c +++ b/Python/pylifecycle.c @@ -589,7 +589,7 @@ pycore_create_interpreter(const _PyCoreConfig *core_config, static _PyInitError pycore_init_types(void) { - _PyInitError err = _Py_ReadyTypes(); + _PyInitError err = _PyTypes_Init(); if (_Py_INIT_FAILED(err)) { return err; } @@ -623,46 +623,6 @@ pycore_init_types(void) } -static _PyInitError -pycore_init_sys(PyInterpreterState *interp, PyObject **sysmod_p) -{ - PyObject *modules = PyDict_New(); - if (modules == NULL) - return _Py_INIT_ERR("can't make modules dictionary"); - interp->modules = modules; - - PyObject *sysmod; - _PyInitError err = _PySys_BeginInit(&sysmod); - if (_Py_INIT_FAILED(err)) { - return err; - } - *sysmod_p = sysmod; - - interp->sysdict = PyModule_GetDict(sysmod); - if (interp->sysdict == NULL) { - return _Py_INIT_ERR("can't initialize sys dict"); - } - - Py_INCREF(interp->sysdict); - PyDict_SetItemString(interp->sysdict, "modules", modules); - _PyImport_FixupBuiltin(sysmod, "sys", modules); - - /* Set up a preliminary stderr printer until we have enough - infrastructure for the io module in place. - - Use UTF-8/surrogateescape and ignore EAGAIN errors. */ - PyObject *pstderr = PyFile_NewStdPrinter(fileno(stderr)); - if (pstderr == NULL) { - return _Py_INIT_ERR("can't set preliminary stderr"); - } - _PySys_SetObjectId(&PyId_stderr, pstderr); - PySys_SetObject("__stderr__", pstderr); - Py_DECREF(pstderr); - - return _Py_INIT_OK(); -} - - static _PyInitError pycore_init_builtins(PyInterpreterState *interp) { @@ -746,7 +706,7 @@ _Py_InitializeCore_impl(PyInterpreterState **interp_p, } PyObject *sysmod; - err = pycore_init_sys(interp, &sysmod); + err = _PySys_Create(interp, &sysmod); if (_Py_INIT_FAILED(err)) { return err; } @@ -887,7 +847,7 @@ _Py_InitializeMainInterpreter(PyInterpreterState *interp, return _Py_INIT_ERR("can't initialize time"); } - if (_PySys_EndInit(interp->sysdict, interp) < 0) { + if (_PySys_InitMain(interp) < 0) { return _Py_INIT_ERR("can't finish initializing sys"); } @@ -1376,7 +1336,9 @@ new_interpreter(PyThreadState **tstate_p) goto handle_error; Py_INCREF(interp->sysdict); PyDict_SetItemString(interp->sysdict, "modules", modules); - _PySys_EndInit(interp->sysdict, interp); + if (_PySys_InitMain(interp) < 0) { + return _Py_INIT_ERR("can't finish initializing sys"); + } } else if (PyErr_Occurred()) { goto handle_error; @@ -1399,15 +1361,10 @@ new_interpreter(PyThreadState **tstate_p) return err; } - /* Set up a preliminary stderr printer until we have enough - infrastructure for the io module in place. */ - PyObject *pstderr = PyFile_NewStdPrinter(fileno(stderr)); - if (pstderr == NULL) { - return _Py_INIT_ERR("can't set preliminary stderr"); + err = _PySys_SetPreliminaryStderr(interp->sysdict); + if (_Py_INIT_FAILED(err)) { + return err; } - _PySys_SetObjectId(&PyId_stderr, pstderr); - PySys_SetObject("__stderr__", pstderr); - Py_DECREF(pstderr); err = _PyImportHooks_Init(); if (_Py_INIT_FAILED(err)) { diff --git a/Python/sysmodule.c b/Python/sysmodule.c index 8efe1699422c..f1cd74ebeccf 100644 --- a/Python/sysmodule.c +++ b/Python/sysmodule.c @@ -2368,19 +2368,12 @@ static struct PyModuleDef sysmodule = { } \ } while (0) - -_PyInitError -_PySys_BeginInit(PyObject **sysmod) +static _PyInitError +_PySys_InitCore(PyObject *sysdict) { - PyObject *m, *sysdict, *version_info; + PyObject *version_info; int res; - m = _PyModule_CreateInitialized(&sysmodule, PYTHON_API_VERSION); - if (m == NULL) { - return _Py_INIT_ERR("failed to create a module object"); - } - sysdict = PyModule_GetDict(m); - /* stdin/stdout/stderr are set in pylifecycle.c */ SET_SYS_FROM_STRING_BORROW("__displayhook__", @@ -2508,9 +2501,6 @@ _PySys_BeginInit(PyObject **sysmod) if (PyErr_Occurred()) { goto err_occurred; } - - *sysmod = m; - return _Py_INIT_OK(); type_init_failed: @@ -2536,8 +2526,9 @@ _PySys_BeginInit(PyObject **sysmod) } while (0) int -_PySys_EndInit(PyObject *sysdict, PyInterpreterState *interp) +_PySys_InitMain(PyInterpreterState *interp) { + PyObject *sysdict = interp->sysdict; const _PyCoreConfig *core_config = &interp->core_config; const _PyMainInterpreterConfig *config = &interp->config; int res; @@ -2552,9 +2543,8 @@ _PySys_EndInit(PyObject *sysdict, PyInterpreterState *interp) #define COPY_LIST(KEY, ATTR) \ do { \ - assert(PyList_Check(config->ATTR)); \ - PyObject *list = PyList_GetSlice(config->ATTR, \ - 0, PyList_GET_SIZE(config->ATTR)); \ + assert(PyList_Check(ATTR)); \ + PyObject *list = PyList_GetSlice(ATTR, 0, PyList_GET_SIZE(ATTR)); \ if (list == NULL) { \ return -1; \ } \ @@ -2562,7 +2552,7 @@ _PySys_EndInit(PyObject *sysdict, PyInterpreterState *interp) Py_DECREF(list); \ } while (0) - COPY_LIST("path", module_search_path); + COPY_LIST("path", config->module_search_path); SET_SYS_FROM_STRING_BORROW("executable", config->executable); SET_SYS_FROM_STRING_BORROW("prefix", config->prefix); @@ -2580,7 +2570,7 @@ _PySys_EndInit(PyObject *sysdict, PyInterpreterState *interp) SET_SYS_FROM_STRING_BORROW("argv", config->argv); } if (config->warnoptions != NULL) { - COPY_LIST("warnoptions", warnoptions); + COPY_LIST("warnoptions", config->warnoptions); } if (config->xoptions != NULL) { PyObject *dict = PyDict_Copy(config->xoptions); @@ -2631,6 +2621,77 @@ _PySys_EndInit(PyObject *sysdict, PyInterpreterState *interp) #undef SET_SYS_FROM_STRING_BORROW #undef SET_SYS_FROM_STRING_INT_RESULT + +/* Set up a preliminary stderr printer until we have enough + infrastructure for the io module in place. + + Use UTF-8/surrogateescape and ignore EAGAIN errors. */ +_PyInitError +_PySys_SetPreliminaryStderr(PyObject *sysdict) +{ + PyObject *pstderr = PyFile_NewStdPrinter(fileno(stderr)); + if (pstderr == NULL) { + goto error; + } + if (_PyDict_SetItemId(sysdict, &PyId_stderr, pstderr) < 0) { + goto error; + } + if (PyDict_SetItemString(sysdict, "__stderr__", pstderr) < 0) { + goto error; + } + Py_DECREF(pstderr); + return _Py_INIT_OK(); + +error: + Py_XDECREF(pstderr); + return _Py_INIT_ERR("can't set preliminary stderr"); +} + + +/* Create sys module without all attributes: _PySys_InitMain() should be called + later to add remaining attributes. */ +_PyInitError +_PySys_Create(PyInterpreterState *interp, PyObject **sysmod_p) +{ + PyObject *modules = PyDict_New(); + if (modules == NULL) { + return _Py_INIT_ERR("can't make modules dictionary"); + } + interp->modules = modules; + + PyObject *sysmod = _PyModule_CreateInitialized(&sysmodule, PYTHON_API_VERSION); + if (sysmod == NULL) { + return _Py_INIT_ERR("failed to create a module object"); + } + + PyObject *sysdict = PyModule_GetDict(sysmod); + if (sysdict == NULL) { + return _Py_INIT_ERR("can't initialize sys dict"); + } + Py_INCREF(sysdict); + interp->sysdict = sysdict; + + if (PyDict_SetItemString(sysdict, "modules", interp->modules) < 0) { + return _Py_INIT_ERR("can't initialize sys module"); + } + + _PyInitError err = _PySys_SetPreliminaryStderr(sysdict); + if (_Py_INIT_FAILED(err)) { + return err; + } + + err = _PySys_InitCore(sysdict); + if (_Py_INIT_FAILED(err)) { + return err; + } + + _PyImport_FixupBuiltin(sysmod, "sys", interp->modules); + + *sysmod_p = sysmod; + return _Py_INIT_OK(); +} + + static PyObject * makepathobject(const wchar_t *path, wchar_t delim) {
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Victor Stinner