#include "Python.h" #include "frameobject.h" #define MODULE_NAME "_warnings" PyDoc_STRVAR(warnings__doc__, MODULE_NAME " provides basic warning filtering support.\n" "It is a helper module to speed up interpreter start-up."); /* Both 'filters' and 'onceregistry' can be set in warnings.py; get_warnings_attr() will reset these variables accordingly. */ static PyObject *_filters; /* List */ static PyObject *_once_registry; /* Dict */ static PyObject *_default_action; /* String */ static long _filters_version; _Py_IDENTIFIER(argv); _Py_IDENTIFIER(stderr); static int check_matched(PyObject *obj, PyObject *arg) { PyObject *result; _Py_IDENTIFIER(match); int rc; if (obj == Py_None) return 1; result = _PyObject_CallMethodId(obj, &PyId_match, "O", arg); if (result == NULL) return -1; rc = PyObject_IsTrue(result); Py_DECREF(result); return rc; } /* Returns a new reference. A NULL return value can mean false or an error. */ static PyObject * get_warnings_attr(const char *attr) { static PyObject *warnings_str = NULL; PyObject *all_modules; PyObject *warnings_module; int result; if (warnings_str == NULL) { warnings_str = PyUnicode_InternFromString("warnings"); if (warnings_str == NULL) return NULL; } all_modules = PyImport_GetModuleDict(); result = PyDict_Contains(all_modules, warnings_str); if (result == -1 || result == 0) return NULL; warnings_module = PyDict_GetItem(all_modules, warnings_str); if (!PyObject_HasAttrString(warnings_module, attr)) return NULL; return PyObject_GetAttrString(warnings_module, attr); } static PyObject * get_once_registry(void) { PyObject *registry; registry = get_warnings_attr("onceregistry"); if (registry == NULL) { if (PyErr_Occurred()) return NULL; return _once_registry; } Py_DECREF(_once_registry); _once_registry = registry; return registry; } static PyObject * get_default_action(void) { PyObject *default_action; default_action = get_warnings_attr("defaultaction"); if (default_action == NULL) { if (PyErr_Occurred()) { return NULL; } return _default_action; } Py_DECREF(_default_action); _default_action = default_action; return default_action; } /* The item is a new reference. */ static PyObject* get_filter(PyObject *category, PyObject *text, Py_ssize_t lineno, PyObject *module, PyObject **item) { PyObject *action; Py_ssize_t i; PyObject *warnings_filters; warnings_filters = get_warnings_attr("filters"); if (warnings_filters == NULL) { if (PyErr_Occurred()) return NULL; } else { Py_DECREF(_filters); _filters = warnings_filters; } if (_filters == NULL || !PyList_Check(_filters)) { PyErr_SetString(PyExc_ValueError, MODULE_NAME ".filters must be a list"); return NULL; } /* _filters could change while we are iterating over it. */ for (i = 0; i < PyList_GET_SIZE(_filters); i++) { PyObject *tmp_item, *action, *msg, *cat, *mod, *ln_obj; Py_ssize_t ln; int is_subclass, good_msg, good_mod; tmp_item = PyList_GET_ITEM(_filters, i); if (!PyTuple_Check(tmp_item) || PyTuple_GET_SIZE(tmp_item) != 5) { PyErr_Format(PyExc_ValueError, MODULE_NAME ".filters item %zd isn't a 5-tuple", i); return NULL; } /* Python code: action, msg, cat, mod, ln = item */ Py_INCREF(tmp_item); action = PyTuple_GET_ITEM(tmp_item, 0); msg = PyTuple_GET_ITEM(tmp_item, 1); cat = PyTuple_GET_ITEM(tmp_item, 2); mod = PyTuple_GET_ITEM(tmp_item, 3); ln_obj = PyTuple_GET_ITEM(tmp_item, 4); good_msg = check_matched(msg, text); if (good_msg == -1) { Py_DECREF(tmp_item); return NULL; } good_mod = check_matched(mod, module); if (good_mod == -1) { Py_DECREF(tmp_item); return NULL; } is_subclass = PyObject_IsSubclass(category, cat); if (is_subclass == -1) { Py_DECREF(tmp_item); return NULL; } ln = PyLong_AsSsize_t(ln_obj); if (ln == -1 && PyErr_Occurred()) { Py_DECREF(tmp_item); return NULL; } if (good_msg && is_subclass && good_mod && (ln == 0 || lineno == ln)) { *item = tmp_item; return action; } Py_DECREF(tmp_item); } action = get_default_action(); if (action != NULL) { Py_INCREF(Py_None); *item = Py_None; return action; } PyErr_SetString(PyExc_ValueError, MODULE_NAME ".defaultaction not found"); return NULL; } static int already_warned(PyObject *registry, PyObject *key, int should_set) { PyObject *version_obj, *already_warned; _Py_IDENTIFIER(version); if (key == NULL) return -1; version_obj = _PyDict_GetItemId(registry, &PyId_version); if (version_obj == NULL || !PyLong_CheckExact(version_obj) || PyLong_AsLong(version_obj) != _filters_version) { PyDict_Clear(registry); version_obj = PyLong_FromLong(_filters_version); if (version_obj == NULL) return -1; if (_PyDict_SetItemId(registry, &PyId_version, version_obj) < 0) { Py_DECREF(version_obj); return -1; } Py_DECREF(version_obj); } else { already_warned = PyDict_GetItem(registry, key); if (already_warned != NULL) { int rc = PyObject_IsTrue(already_warned); if (rc != 0) return rc; } } /* This warning wasn't found in the registry, set it. */ if (should_set) return PyDict_SetItem(registry, key, Py_True); return 0; } /* New reference. */ static PyObject * normalize_module(PyObject *filename) { PyObject *module; int kind; void *data; Py_ssize_t len; len = PyUnicode_GetLength(filename); if (len < 0) return NULL; if (len == 0) return PyUnicode_FromString(""); kind = PyUnicode_KIND(filename); data = PyUnicode_DATA(filename); /* if filename.endswith(".py"): */ if (len >= 3 && PyUnicode_READ(kind, data, len-3) == '.' && PyUnicode_READ(kind, data, len-2) == 'p' && PyUnicode_READ(kind, data, len-1) == 'y') { module = PyUnicode_Substring(filename, 0, len-3); } else { module = filename; Py_INCREF(module); } return module; } static int update_registry(PyObject *registry, PyObject *text, PyObject *category, int add_zero) { PyObject *altkey, *zero = NULL; int rc; if (add_zero) { zero = PyLong_FromLong(0); if (zero == NULL) return -1; altkey = PyTuple_Pack(3, text, category, zero); } else altkey = PyTuple_Pack(2, text, category); rc = already_warned(registry, altkey, 1); Py_XDECREF(zero); Py_XDECREF(altkey); return rc; } static void show_warning(PyObject *filename, int lineno, PyObject *text, PyObject *category, PyObject *sourceline) { PyObject *f_stderr; PyObject *name; char lineno_str[128]; _Py_IDENTIFIER(__name__); PyOS_snprintf(lineno_str, sizeof(lineno_str), ":%d: ", lineno); name = _PyObject_GetAttrId(category, &PyId___name__); if (name == NULL) /* XXX Can an object lack a '__name__' attribute? */ goto error; f_stderr = _PySys_GetObjectId(&PyId_stderr); if (f_stderr == NULL) { fprintf(stderr, "lost sys.stderr\n"); goto error; } /* Print "filename:lineno: category: text\n" */ if (PyFile_WriteObject(filename, f_stderr, Py_PRINT_RAW) < 0) goto error; if (PyFile_WriteString(lineno_str, f_stderr) < 0) goto error; if (PyFile_WriteObject(name, f_stderr, Py_PRINT_RAW) < 0) goto error; if (PyFile_WriteString(": ", f_stderr) < 0) goto error; if (PyFile_WriteObject(text, f_stderr, Py_PRINT_RAW) < 0) goto error; if (PyFile_WriteString("\n", f_stderr) < 0) goto error; Py_CLEAR(name); /* Print " source_line\n" */ if (sourceline) { int kind; void *data; Py_ssize_t i, len; Py_UCS4 ch; PyObject *truncated; if (PyUnicode_READY(sourceline) < 1) goto error; kind = PyUnicode_KIND(sourceline); data = PyUnicode_DATA(sourceline); len = PyUnicode_GET_LENGTH(sourceline); for (i=0; iob_type; } else { text = message; message = PyObject_CallFunction(category, "O", message); if (message == NULL) goto cleanup; } lineno_obj = PyLong_FromLong(lineno); if (lineno_obj == NULL) goto cleanup; /* Create key. */ key = PyTuple_Pack(3, text, category, lineno_obj); if (key == NULL) goto cleanup; if ((registry != NULL) && (registry != Py_None)) { rc = already_warned(registry, key, 0); if (rc == -1) goto cleanup; else if (rc == 1) goto return_none; /* Else this warning hasn't been generated before. */ } action = get_filter(category, text, lineno, module, &item); if (action == NULL) goto cleanup; if (_PyUnicode_EqualToASCIIString(action, "error")) { PyErr_SetObject(category, message); goto cleanup; } /* Store in the registry that we've been here, *except* when the action is "always". */ rc = 0; if (!_PyUnicode_EqualToASCIIString(action, "always")) { if (registry != NULL && registry != Py_None && PyDict_SetItem(registry, key, Py_True) < 0) goto cleanup; else if (_PyUnicode_EqualToASCIIString(action, "ignore")) goto return_none; else if (_PyUnicode_EqualToASCIIString(action, "once")) { if (registry == NULL || registry == Py_None) { registry = get_once_registry(); if (registry == NULL) goto cleanup; } /* _once_registry[(text, category)] = 1 */ rc = update_registry(registry, text, category, 0); } else if (_PyUnicode_EqualToASCIIString(action, "module")) { /* registry[(text, category, 0)] = 1 */ if (registry != NULL && registry != Py_None) rc = update_registry(registry, text, category, 0); } else if (!_PyUnicode_EqualToASCIIString(action, "default")) { PyErr_Format(PyExc_RuntimeError, "Unrecognized action (%R) in warnings.filters:\n %R", action, item); goto cleanup; } } if (rc == 1) /* Already warned for this module. */ goto return_none; if (rc == 0) { PyObject *show_fxn = get_warnings_attr("showwarning"); if (show_fxn == NULL) { if (PyErr_Occurred()) goto cleanup; show_warning(filename, lineno, text, category, sourceline); } else { PyObject *res; if (!PyCallable_Check(show_fxn)) { PyErr_SetString(PyExc_TypeError, "warnings.showwarning() must be set to a " "callable"); Py_DECREF(show_fxn); goto cleanup; } res = PyObject_CallFunctionObjArgs(show_fxn, message, category, filename, lineno_obj, NULL); Py_DECREF(show_fxn); Py_XDECREF(res); if (res == NULL) goto cleanup; } } else /* if (rc == -1) */ goto cleanup; return_none: result = Py_None; Py_INCREF(result); cleanup: Py_XDECREF(item); Py_XDECREF(key); Py_XDECREF(text); Py_XDECREF(lineno_obj); Py_DECREF(module); Py_XDECREF(message); return result; /* Py_None or NULL. */ } static int is_internal_frame(PyFrameObject *frame) { static PyObject *importlib_string = NULL; static PyObject *bootstrap_string = NULL; PyObject *filename; int contains; if (importlib_string == NULL) { importlib_string = PyUnicode_FromString("importlib"); if (importlib_string == NULL) { return 0; } bootstrap_string = PyUnicode_FromString("_bootstrap"); if (bootstrap_string == NULL) { Py_DECREF(importlib_string); return 0; } Py_INCREF(importlib_string); Py_INCREF(bootstrap_string); } if (frame == NULL || frame->f_code == NULL || frame->f_code->co_filename == NULL) { return 0; } filename = frame->f_code->co_filename; if (!PyUnicode_Check(filename)) { return 0; } contains = PyUnicode_Contains(filename, importlib_string); if (contains < 0) { return 0; } else if (contains > 0) { contains = PyUnicode_Contains(filename, bootstrap_string); if (contains < 0) { return 0; } else if (contains > 0) { return 1; } } return 0; } static PyFrameObject * next_external_frame(PyFrameObject *frame) { do { frame = frame->f_back; } while (frame != NULL && is_internal_frame(frame)); return frame; } /* filename, module, and registry are new refs, globals is borrowed */ /* Returns 0 on error (no new refs), 1 on success */ static int setup_context(Py_ssize_t stack_level, PyObject **filename, int *lineno, PyObject **module, PyObject **registry) { PyObject *globals; /* Setup globals and lineno. */ PyFrameObject *f = PyThreadState_GET()->frame; // Stack level comparisons to Python code is off by one as there is no // warnings-related stack level to avoid. if (stack_level <= 0 || is_internal_frame(f)) { while (--stack_level > 0 && f != NULL) { f = f->f_back; } } else { while (--stack_level > 0 && f != NULL) { f = next_external_frame(f); } } if (f == NULL) { globals = PyThreadState_Get()->interp->sysdict; *lineno = 1; } else { globals = f->f_globals; *lineno = PyFrame_GetLineNumber(f); } *module = NULL; /* Setup registry. */ assert(globals != NULL); assert(PyDict_Check(globals)); *registry = PyDict_GetItemString(globals, "__warningregistry__"); if (*registry == NULL) { int rc; *registry = PyDict_New(); if (*registry == NULL) return 0; rc = PyDict_SetItemString(globals, "__warningregistry__", *registry); if (rc < 0) goto handle_error; } else Py_INCREF(*registry); /* Setup module. */ *module = PyDict_GetItemString(globals, "__name__"); if (*module == NULL) { *module = PyUnicode_FromString(""); if (*module == NULL) goto handle_error; } else Py_INCREF(*module); /* Setup filename. */ *filename = PyDict_GetItemString(globals, "__file__"); if (*filename != NULL && PyUnicode_Check(*filename)) { Py_ssize_t len; int kind; void *data; if (PyUnicode_READY(*filename)) goto handle_error; len = PyUnicode_GetLength(*filename); kind = PyUnicode_KIND(*filename); data = PyUnicode_DATA(*filename); #define ascii_lower(c) ((c <= 127) ? Py_TOLOWER(c) : 0) /* if filename.lower().endswith(".pyc"): */ if (len >= 4 && PyUnicode_READ(kind, data, len-4) == '.' && ascii_lower(PyUnicode_READ(kind, data, len-3)) == 'p' && ascii_lower(PyUnicode_READ(kind, data, len-2)) == 'y' && ascii_lower(PyUnicode_READ(kind, data, len-1)) == 'c') { *filename = PyUnicode_Substring(*filename, 0, PyUnicode_GET_LENGTH(*filename)-1); if (*filename == NULL) goto handle_error; } else Py_INCREF(*filename); } else { *filename = NULL; if (*module != Py_None && _PyUnicode_EqualToASCIIString(*module, "__main__")) { PyObject *argv = _PySys_GetObjectId(&PyId_argv); /* PyList_Check() is needed because sys.argv is set to None during Python finalization */ if (argv != NULL && PyList_Check(argv) && PyList_Size(argv) > 0) { int is_true; *filename = PyList_GetItem(argv, 0); Py_INCREF(*filename); /* If sys.argv[0] is false, then use '__main__'. */ is_true = PyObject_IsTrue(*filename); if (is_true < 0) { Py_DECREF(*filename); goto handle_error; } else if (!is_true) { Py_SETREF(*filename, PyUnicode_FromString("__main__")); if (*filename == NULL) goto handle_error; } } else { /* embedded interpreters don't have sys.argv, see bug #839151 */ *filename = PyUnicode_FromString("__main__"); if (*filename == NULL) goto handle_error; } } if (*filename == NULL) { *filename = *module; Py_INCREF(*filename); } } return 1; handle_error: /* filename not XDECREF'ed here as there is no way to jump here with a dangling reference. */ Py_XDECREF(*registry); Py_XDECREF(*module); return 0; } static PyObject * get_category(PyObject *message, PyObject *category) { int rc; /* Get category. */ rc = PyObject_IsInstance(message, PyExc_Warning); if (rc == -1) return NULL; if (rc == 1) category = (PyObject*)message->ob_type; else if (category == NULL || category == Py_None) category = PyExc_UserWarning; /* Validate category. */ rc = PyObject_IsSubclass(category, PyExc_Warning); /* category is not a subclass of PyExc_Warning or PyObject_IsSubclass raised an error */ if (rc == -1 || rc == 0) { PyErr_Format(PyExc_TypeError, "category must be a Warning subclass, not '%s'", Py_TYPE(category)->tp_name); return NULL; } return category; } static PyObject * do_warn(PyObject *message, PyObject *category, Py_ssize_t stack_level) { PyObject *filename, *module, *registry, *res; int lineno; if (!setup_context(stack_level, &filename, &lineno, &module, ®istry)) return NULL; res = warn_explicit(category, message, filename, lineno, module, registry, NULL); Py_DECREF(filename); Py_DECREF(registry); Py_DECREF(module); return res; } static PyObject * warnings_warn(PyObject *self, PyObject *args, PyObject *kwds) { static char *kw_list[] = { "message", "category", "stacklevel", 0 }; PyObject *message, *category = NULL; Py_ssize_t stack_level = 1; if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|On:warn", kw_list, &message, &category, &stack_level)) return NULL; category = get_category(message, category); if (category == NULL) return NULL; return do_warn(message, category, stack_level); } static PyObject * warnings_warn_explicit(PyObject *self, PyObject *args, PyObject *kwds) { static char *kwd_list[] = {"message", "category", "filename", "lineno", "module", "registry", "module_globals", 0}; PyObject *message; PyObject *category; PyObject *filename; int lineno; PyObject *module = NULL; PyObject *registry = NULL; PyObject *module_globals = NULL; if (!PyArg_ParseTupleAndKeywords(args, kwds, "OOUi|OOO:warn_explicit", kwd_list, &message, &category, &filename, &lineno, &module, ®istry, &module_globals)) return NULL; if (module_globals) { _Py_IDENTIFIER(get_source); _Py_IDENTIFIER(splitlines); PyObject *tmp; PyObject *loader; PyObject *module_name; PyObject *source; PyObject *source_list; PyObject *source_line; PyObject *returned; if ((tmp = _PyUnicode_FromId(&PyId_get_source)) == NULL) return NULL; if ((tmp = _PyUnicode_FromId(&PyId_splitlines)) == NULL) return NULL; /* Check/get the requisite pieces needed for the loader. */ loader = PyDict_GetItemString(module_globals, "__loader__"); module_name = PyDict_GetItemString(module_globals, "__name__"); if (loader == NULL || module_name == NULL) goto standard_call; /* Make sure the loader implements the optional get_source() method. */ if (!_PyObject_HasAttrId(loader, &PyId_get_source)) goto standard_call; /* Call get_source() to get the source code. */ source = PyObject_CallMethodObjArgs(loader, PyId_get_source.object, module_name, NULL); if (!source) return NULL; else if (source == Py_None) { Py_DECREF(Py_None); goto standard_call; } /* Split the source into lines. */ source_list = PyObject_CallMethodObjArgs(source, PyId_splitlines.object, NULL); Py_DECREF(source); if (!source_list) return NULL; /* Get the source line. */ source_line = PyList_GetItem(source_list, lineno-1); if (!source_line) { Py_DECREF(source_list); return NULL; } /* Handle the warning. */ returned = warn_explicit(category, message, filename, lineno, module, registry, source_line); Py_DECREF(source_list); return returned; } standard_call: return warn_explicit(category, message, filename, lineno, module, registry, NULL); } static PyObject * warnings_filters_mutated(PyObject *self, PyObject *args) { _filters_version++; Py_RETURN_NONE; } /* Function to issue a warning message; may raise an exception. */ static int warn_unicode(PyObject *category, PyObject *message, Py_ssize_t stack_level) { PyObject *res; if (category == NULL) category = PyExc_RuntimeWarning; res = do_warn(message, category, stack_level); if (res == NULL) return -1; Py_DECREF(res); return 0; } int PyErr_WarnFormat(PyObject *category, Py_ssize_t stack_level, const char *format, ...) { int ret; PyObject *message; va_list vargs; #ifdef HAVE_STDARG_PROTOTYPES va_start(vargs, format); #else va_start(vargs); #endif message = PyUnicode_FromFormatV(format, vargs); if (message != NULL) { ret = warn_unicode(category, message, stack_level); Py_DECREF(message); } else ret = -1; va_end(vargs); return ret; } int PyErr_WarnEx(PyObject *category, const char *text, Py_ssize_t stack_level) { int ret; PyObject *message = PyUnicode_FromString(text); if (message == NULL) return -1; ret = warn_unicode(category, message, stack_level); Py_DECREF(message); return ret; } /* PyErr_Warn is only for backwards compatibility and will be removed. Use PyErr_WarnEx instead. */ #undef PyErr_Warn PyAPI_FUNC(int) PyErr_Warn(PyObject *category, char *text) { return PyErr_WarnEx(category, text, 1); } /* Warning with explicit origin */ int PyErr_WarnExplicitObject(PyObject *category, PyObject *message, PyObject *filename, int lineno, PyObject *module, PyObject *registry) { PyObject *res; if (category == NULL) category = PyExc_RuntimeWarning; res = warn_explicit(category, message, filename, lineno, module, registry, NULL); if (res == NULL) return -1; Py_DECREF(res); return 0; } int PyErr_WarnExplicit(PyObject *category, const char *text, const char *filename_str, int lineno, const char *module_str, PyObject *registry) { PyObject *message = PyUnicode_FromString(text); PyObject *filename = PyUnicode_DecodeFSDefault(filename_str); PyObject *module = NULL; int ret = -1; if (message == NULL || filename == NULL) goto exit; if (module_str != NULL) { module = PyUnicode_FromString(module_str); if (module == NULL) goto exit; } ret = PyErr_WarnExplicitObject(category, message, filename, lineno, module, registry); exit: Py_XDECREF(message); Py_XDECREF(module); Py_XDECREF(filename); return ret; } int PyErr_WarnExplicitFormat(PyObject *category, const char *filename_str, int lineno, const char *module_str, PyObject *registry, const char *format, ...) { PyObject *message; PyObject *module = NULL; PyObject *filename = PyUnicode_DecodeFSDefault(filename_str); int ret = -1; va_list vargs; if (filename == NULL) goto exit; if (module_str != NULL) { module = PyUnicode_FromString(module_str); if (module == NULL) goto exit; } #ifdef HAVE_STDARG_PROTOTYPES va_start(vargs, format); #else va_start(vargs); #endif message = PyUnicode_FromFormatV(format, vargs); if (message != NULL) { PyObject *res; res = warn_explicit(category, message, filename, lineno, module, registry, NULL); Py_DECREF(message); if (res != NULL) { Py_DECREF(res); ret = 0; } } va_end(vargs); exit: Py_XDECREF(module); Py_XDECREF(filename); return ret; } PyDoc_STRVAR(warn_doc, "Issue a warning, or maybe ignore it or raise an exception."); PyDoc_STRVAR(warn_explicit_doc, "Low-level inferface to warnings functionality."); static PyMethodDef warnings_functions[] = { {"warn", (PyCFunction)warnings_warn, METH_VARARGS | METH_KEYWORDS, warn_doc}, {"warn_explicit", (PyCFunction)warnings_warn_explicit, METH_VARARGS | METH_KEYWORDS, warn_explicit_doc}, {"_filters_mutated", (PyCFunction)warnings_filters_mutated, METH_NOARGS, NULL}, /* XXX(brett.cannon): add showwarning? */ /* XXX(brett.cannon): Reasonable to add formatwarning? */ {NULL, NULL} /* sentinel */ }; static PyObject * create_filter(PyObject *category, const char *action) { static PyObject *ignore_str = NULL; static PyObject *error_str = NULL; static PyObject *default_str = NULL; static PyObject *always_str = NULL; PyObject *action_obj = NULL; PyObject *lineno, *result; if (!strcmp(action, "ignore")) { if (ignore_str == NULL) { ignore_str = PyUnicode_InternFromString("ignore"); if (ignore_str == NULL) return NULL; } action_obj = ignore_str; } else if (!strcmp(action, "error")) { if (error_str == NULL) { error_str = PyUnicode_InternFromString("error"); if (error_str == NULL) return NULL; } action_obj = error_str; } else if (!strcmp(action, "default")) { if (default_str == NULL) { default_str = PyUnicode_InternFromString("default"); if (default_str == NULL) return NULL; } action_obj = default_str; } else if (!strcmp(action, "always")) { if (always_str == NULL) { always_str = PyUnicode_InternFromString("always"); if (always_str == NULL) return NULL; } action_obj = always_str; } else { Py_FatalError("unknown action"); } /* This assumes the line number is zero for now. */ lineno = PyLong_FromLong(0); if (lineno == NULL) return NULL; result = PyTuple_Pack(5, action_obj, Py_None, category, Py_None, lineno); Py_DECREF(lineno); return result; } static PyObject * init_filters(void) { PyObject *filters = PyList_New(5); unsigned int pos = 0; /* Post-incremented in each use. */ unsigned int x; const char *bytes_action, *resource_action; if (filters == NULL) return NULL; PyList_SET_ITEM(filters, pos++, create_filter(PyExc_DeprecationWarning, "ignore")); PyList_SET_ITEM(filters, pos++, create_filter(PyExc_PendingDeprecationWarning, "ignore")); PyList_SET_ITEM(filters, pos++, create_filter(PyExc_ImportWarning, "ignore")); if (Py_BytesWarningFlag > 1) bytes_action = "error"; else if (Py_BytesWarningFlag) bytes_action = "default"; else bytes_action = "ignore"; PyList_SET_ITEM(filters, pos++, create_filter(PyExc_BytesWarning, bytes_action)); /* resource usage warnings are enabled by default in pydebug mode */ #ifdef Py_DEBUG resource_action = "always"; #else resource_action = "ignore"; #endif PyList_SET_ITEM(filters, pos++, create_filter(PyExc_ResourceWarning, resource_action)); for (x = 0; x < pos; x += 1) { if (PyList_GET_ITEM(filters, x) == NULL) { Py_DECREF(filters); return NULL; } } return filters; } static struct PyModuleDef warningsmodule = { PyModuleDef_HEAD_INIT, MODULE_NAME, warnings__doc__, 0, warnings_functions, NULL, NULL, NULL, NULL }; PyMODINIT_FUNC _PyWarnings_Init(void) { PyObject *m; m = PyModule_Create(&warningsmodule); if (m == NULL) return NULL; if (_filters == NULL) { _filters = init_filters(); if (_filters == NULL) return NULL; } Py_INCREF(_filters); if (PyModule_AddObject(m, "filters", _filters) < 0) return NULL; if (_once_registry == NULL) { _once_registry = PyDict_New(); if (_once_registry == NULL) return NULL; } Py_INCREF(_once_registry); if (PyModule_AddObject(m, "_onceregistry", _once_registry) < 0) return NULL; if (_default_action == NULL) { _default_action = PyUnicode_FromString("default"); if (_default_action == NULL) return NULL; } Py_INCREF(_default_action); if (PyModule_AddObject(m, "_defaultaction", _default_action) < 0) return NULL; _filters_version = 0; return m; } 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 
#include "Python.h"
#include "pycore_fileutils.h"     // _Py_write_noraise()
#include "pycore_gc.h"            // PyGC_Head
#include "pycore_hashtable.h"     // _Py_hashtable_t
#include "pycore_object.h"        // _PyType_PreHeaderSize()
#include "pycore_pymem.h"         // _Py_tracemalloc_config
#include "pycore_runtime.h"       // _Py_ID()
#include "pycore_traceback.h"     // _Py_DumpASCII()
#include <pycore_frame.h>

#include "frameobject.h"          // _PyInterpreterFrame_GetLine

#include <stdlib.h>               // malloc()

#define tracemalloc_config _PyRuntime.tracemalloc.config

_Py_DECLARE_STR(anon_unknown, "<unknown>");

/* Forward declaration */
static void* raw_malloc(size_t size);
static void raw_free(void *ptr);

#ifdef Py_DEBUG
#  define TRACE_DEBUG
#endif

#define TO_PTR(key) ((const void *)(uintptr_t)(key))
#define FROM_PTR(key) ((uintptr_t)(key))

#define allocators _PyRuntime.tracemalloc.allocators


#if defined(TRACE_RAW_MALLOC)
/* This lock is needed because tracemalloc_free() is called without
   the GIL held from PyMem_RawFree(). It cannot acquire the lock because it
   would introduce a deadlock in _PyThreadState_DeleteCurrent(). */
#  define tables_lock _PyRuntime.tracemalloc.tables_lock
#  define TABLES_LOCK() PyThread_acquire_lock(tables_lock, 1)
#  define TABLES_UNLOCK() PyThread_release_lock(tables_lock)
#else
   /* variables are protected by the GIL */
#  define TABLES_LOCK()
#  define TABLES_UNLOCK()
#endif


#define DEFAULT_DOMAIN 0

typedef struct tracemalloc_frame frame_t;
typedef struct tracemalloc_traceback traceback_t;

#define TRACEBACK_SIZE(NFRAME) \
        (sizeof(traceback_t) + sizeof(frame_t) * (NFRAME - 1))

/* The maximum number of frames is either:
 - The maximum number of frames we can store in `traceback_t.nframe`
 - The maximum memory size_t we can allocate */
static const unsigned long MAX_NFRAME = Py_MIN(UINT16_MAX, ((SIZE_MAX - sizeof(traceback_t)) / sizeof(frame_t) + 1));


#define tracemalloc_empty_traceback _PyRuntime.tracemalloc.empty_traceback


/* Trace of a memory block */
typedef struct {
    /* Size of the memory block in bytes */
    size_t size;

    /* Traceback where the memory block was allocated */
    traceback_t *traceback;
} trace_t;


#define tracemalloc_traced_memory _PyRuntime.tracemalloc.traced_memory
#define tracemalloc_peak_traced_memory _PyRuntime.tracemalloc.peak_traced_memory
#define tracemalloc_filenames _PyRuntime.tracemalloc.filenames
#define tracemalloc_traceback _PyRuntime.tracemalloc.traceback
#define tracemalloc_tracebacks _PyRuntime.tracemalloc.tracebacks
#define tracemalloc_traces _PyRuntime.tracemalloc.traces
#define tracemalloc_domains _PyRuntime.tracemalloc.domains


#ifdef TRACE_DEBUG
static void
tracemalloc_error(const char *format, ...)
{
    va_list ap;
    fprintf(stderr, "tracemalloc: ");
    va_start(ap, format);
    vfprintf(stderr, format, ap);
    va_end(ap);
    fprintf(stderr, "\n");
    fflush(stderr);
}
#endif


#if defined(TRACE_RAW_MALLOC)
#define REENTRANT_THREADLOCAL

#define tracemalloc_reentrant_key _PyRuntime.tracemalloc.reentrant_key

/* Any non-NULL pointer can be used */
#define REENTRANT Py_True

static int
get_reentrant(void)
{
    void *ptr;

    assert(PyThread_tss_is_created(&tracemalloc_reentrant_key));
    ptr = PyThread_tss_get(&tracemalloc_reentrant_key);
    if (ptr != NULL) {
        assert(ptr == REENTRANT);
        return 1;
    }
    else
        return 0;
}

static void
set_reentrant(int reentrant)
{
    assert(reentrant == 0 || reentrant == 1);
    assert(PyThread_tss_is_created(&tracemalloc_reentrant_key));

    if (reentrant) {
        assert(!get_reentrant());
        PyThread_tss_set(&tracemalloc_reentrant_key, REENTRANT);
    }
    else {
        assert(get_reentrant());
        PyThread_tss_set(&tracemalloc_reentrant_key, NULL);
    }
}

#else

/* TRACE_RAW_MALLOC not defined: variable protected by the GIL */
static int tracemalloc_reentrant = 0;

static int
get_reentrant(void)
{
    return tracemalloc_reentrant;
}

static void
set_reentrant(int reentrant)
{
    assert(reentrant != tracemalloc_reentrant);
    tracemalloc_reentrant = reentrant;
}
#endif


static Py_uhash_t
hashtable_hash_pyobject(const void *key)
{
    PyObject *obj = (PyObject *)key;
    return PyObject_Hash(obj);
}


static int
hashtable_compare_unicode(const void *key1, const void *key2)
{
    PyObject *obj1 = (PyObject *)key1;
    PyObject *obj2 = (PyObject *)key2;
    if (obj1 != NULL && obj2 != NULL) {
        return (PyUnicode_Compare(obj1, obj2) == 0);
    }
    else {
        return obj1 == obj2;
    }
}


static Py_uhash_t
hashtable_hash_uint(const void *key_raw)
{
    unsigned int key = (unsigned int)FROM_PTR(key_raw);
    return (Py_uhash_t)key;
}


static _Py_hashtable_t *
hashtable_new(_Py_hashtable_hash_func hash_func,
              _Py_hashtable_compare_func compare_func,
              _Py_hashtable_destroy_func key_destroy_func,
              _Py_hashtable_destroy_func value_destroy_func)
{
    _Py_hashtable_allocator_t hashtable_alloc = {malloc, free};
    return _Py_hashtable_new_full(hash_func, compare_func,
                                  key_destroy_func, value_destroy_func,
                                  &hashtable_alloc);
}


static void*
raw_malloc(size_t size)
{
    return allocators.raw.malloc(allocators.raw.ctx, size);
}

static void
raw_free(void *ptr)
{
    allocators.raw.free(allocators.raw.ctx, ptr);
}


static Py_uhash_t
hashtable_hash_traceback(const void *key)
{
    const traceback_t *traceback = (const traceback_t *)key;
    return traceback->hash;
}


static int
hashtable_compare_traceback(const void *key1, const void *key2)
{
    const traceback_t *traceback1 = (const traceback_t *)key1;
    const traceback_t *traceback2 = (const traceback_t *)key2;

    if (traceback1->nframe != traceback2->nframe) {
        return 0;
    }
    if (traceback1->total_nframe != traceback2->total_nframe) {
        return 0;
    }

    for (int i=0; i < traceback1->nframe; i++) {
        const frame_t *frame1 = &traceback1->frames[i];
        const frame_t *frame2 = &traceback2->frames[i];

        if (frame1->lineno != frame2->lineno) {
            return 0;
        }
        if (frame1->filename != frame2->filename) {
            assert(PyUnicode_Compare(frame1->filename, frame2->filename) != 0);
            return 0;
        }
    }
    return 1;
}


static void
tracemalloc_get_frame(_PyInterpreterFrame *pyframe, frame_t *frame)
{
    assert(PyStackRef_CodeCheck(pyframe->f_executable));
    frame->filename = &_Py_STR(anon_unknown);
    int lineno = PyUnstable_InterpreterFrame_GetLine(pyframe);
    if (lineno < 0) {
        lineno = 0;
    }
    frame->lineno = (unsigned int)lineno;

    PyObject *filename = filename = _PyFrame_GetCode(pyframe)->co_filename;

    if (filename == NULL) {
#ifdef TRACE_DEBUG
        tracemalloc_error("failed to get the filename of the code object");
#endif
        return;
    }

    if (!PyUnicode_Check(filename)) {
#ifdef TRACE_DEBUG
        tracemalloc_error("filename is not a unicode string");
#endif
        return;
    }
    if (!PyUnicode_IS_READY(filename)) {
        /* Don't make a Unicode string ready to avoid reentrant calls
           to tracemalloc_malloc() or tracemalloc_realloc() */
#ifdef TRACE_DEBUG
        tracemalloc_error("filename is not a ready unicode string");
#endif
        return;
    }

    /* intern the filename */
    _Py_hashtable_entry_t *entry;
    entry = _Py_hashtable_get_entry(tracemalloc_filenames, filename);
    if (entry != NULL) {
        filename = (PyObject *)entry->key;
    }
    else {
        /* tracemalloc_filenames is responsible to keep a reference
           to the filename */
        if (_Py_hashtable_set(tracemalloc_filenames, Py_NewRef(filename),
                              NULL) < 0) {
            Py_DECREF(filename);
#ifdef TRACE_DEBUG
            tracemalloc_error("failed to intern the filename");
#endif
            return;
        }
    }

    /* the tracemalloc_filenames table keeps a reference to the filename */
    frame->filename = filename;
}


static Py_uhash_t
traceback_hash(traceback_t *traceback)
{
    /* code based on tuplehash() of Objects/tupleobject.c */
    Py_uhash_t x, y;  /* Unsigned for defined overflow behavior. */
    int len = traceback->nframe;
    Py_uhash_t mult = PyHASH_MULTIPLIER;
    frame_t *frame;

    x = 0x345678UL;
    frame = traceback->frames;
    while (--len >= 0) {
        y = (Py_uhash_t)PyObject_Hash(frame->filename);
        y ^= (Py_uhash_t)frame->lineno;
        frame++;

        x = (x ^ y) * mult;
        /* the cast might truncate len; that doesn't change hash stability */
        mult += (Py_uhash_t)(82520UL + len + len);
    }
    x ^= traceback->total_nframe;
    x += 97531UL;
    return x;
}


static void
traceback_get_frames(traceback_t *traceback)
{
    PyThreadState *tstate = PyGILState_GetThisThreadState();
    if (tstate == NULL) {
#ifdef TRACE_DEBUG
        tracemalloc_error("failed to get the current thread state");
#endif
        return;
    }

    _PyInterpreterFrame *pyframe = _PyThreadState_GetFrame(tstate);
    while (pyframe) {
        if (traceback->nframe < tracemalloc_config.max_nframe) {
            tracemalloc_get_frame(pyframe, &traceback->frames[traceback->nframe]);
            assert(traceback->frames[traceback->nframe].filename != NULL);
            traceback->nframe++;
        }
        if (traceback->total_nframe < UINT16_MAX) {
            traceback->total_nframe++;
        }
        pyframe = _PyFrame_GetFirstComplete(pyframe->previous);
    }
}


static traceback_t *
traceback_new(void)
{
    traceback_t *traceback;
    _Py_hashtable_entry_t *entry;

    assert(PyGILState_Check());

    /* get frames */
    traceback = tracemalloc_traceback;
    traceback->nframe = 0;
    traceback->total_nframe = 0;
    traceback_get_frames(traceback);
    if (traceback->nframe == 0)
        return &tracemalloc_empty_traceback;
    traceback->hash = traceback_hash(traceback);

    /* intern the traceback */
    entry = _Py_hashtable_get_entry(tracemalloc_tracebacks, traceback);
    if (entry != NULL) {
        traceback = (traceback_t *)entry->key;
    }
    else {
        traceback_t *copy;
        size_t traceback_size;

        traceback_size = TRACEBACK_SIZE(traceback->nframe);

        copy = raw_malloc(traceback_size);
        if (copy == NULL) {
#ifdef TRACE_DEBUG
            tracemalloc_error("failed to intern the traceback: malloc failed");
#endif
            return NULL;
        }
        memcpy(copy, traceback, traceback_size);

        if (_Py_hashtable_set(tracemalloc_tracebacks, copy, NULL) < 0) {
            raw_free(copy);
#ifdef TRACE_DEBUG
            tracemalloc_error("failed to intern the traceback: putdata failed");
#endif
            return NULL;
        }
        traceback = copy;
    }
    return traceback;
}


static _Py_hashtable_t*
tracemalloc_create_traces_table(void)
{
    return hashtable_new(_Py_hashtable_hash_ptr,
                         _Py_hashtable_compare_direct,
                         NULL, raw_free);
}


static _Py_hashtable_t*
tracemalloc_create_domains_table(void)
{
    return hashtable_new(hashtable_hash_uint,
                         _Py_hashtable_compare_direct,
                         NULL,
                         (_Py_hashtable_destroy_func)_Py_hashtable_destroy);
}


static _Py_hashtable_t*
tracemalloc_get_traces_table(unsigned int domain)
{
    if (domain == DEFAULT_DOMAIN) {
        return tracemalloc_traces;
    }
    else {
        return _Py_hashtable_get(tracemalloc_domains, TO_PTR(domain));
    }
}


static void
tracemalloc_remove_trace(unsigned int domain, uintptr_t ptr)
{
    assert(tracemalloc_config.tracing);

    _Py_hashtable_t *traces = tracemalloc_get_traces_table(domain);
    if (!traces) {
        return;
    }

    trace_t *trace = _Py_hashtable_steal(traces, TO_PTR(ptr));
    if (!trace) {
        return;
    }
    assert(tracemalloc_traced_memory >= trace->size);
    tracemalloc_traced_memory -= trace->size;
    raw_free(trace);
}

#define REMOVE_TRACE(ptr) \
            tracemalloc_remove_trace(DEFAULT_DOMAIN, (uintptr_t)(ptr))


static int
tracemalloc_add_trace(unsigned int domain, uintptr_t ptr,
                      size_t size)
{
    assert(tracemalloc_config.tracing);

    traceback_t *traceback = traceback_new();
    if (traceback == NULL) {
        return -1;
    }

    _Py_hashtable_t *traces = tracemalloc_get_traces_table(domain);
    if (traces == NULL) {
        traces = tracemalloc_create_traces_table();
        if (traces == NULL) {
            return -1;
        }

        if (_Py_hashtable_set(tracemalloc_domains, TO_PTR(domain), traces) < 0) {
            _Py_hashtable_destroy(traces);
            return -1;
        }
    }

    trace_t *trace = _Py_hashtable_get(traces, TO_PTR(ptr));
    if (trace != NULL) {
        /* the memory block is already tracked */
        assert(tracemalloc_traced_memory >= trace->size);
        tracemalloc_traced_memory -= trace->size;

        trace->size = size;
        trace->traceback = traceback;
    }
    else {
        trace = raw_malloc(sizeof(trace_t));
        if (trace == NULL) {
            return -1;
        }
        trace->size = size;
        trace->traceback = traceback;

        int res = _Py_hashtable_set(traces, TO_PTR(ptr), trace);
        if (res != 0) {
            raw_free(trace);
            return res;
        }
    }

    assert(tracemalloc_traced_memory <= SIZE_MAX - size);
    tracemalloc_traced_memory += size;
    if (tracemalloc_traced_memory > tracemalloc_peak_traced_memory) {
        tracemalloc_peak_traced_memory = tracemalloc_traced_memory;
    }
    return 0;
}

#define ADD_TRACE(ptr, size) \
            tracemalloc_add_trace(DEFAULT_DOMAIN, (uintptr_t)(ptr), size)


static void*
tracemalloc_alloc(int use_calloc, void *ctx, size_t nelem, size_t elsize)
{
    PyMemAllocatorEx *alloc = (PyMemAllocatorEx *)ctx;
    void *ptr;

    assert(elsize == 0 || nelem <= SIZE_MAX / elsize);

    if (use_calloc)
        ptr = alloc->calloc(alloc->ctx, nelem, elsize);
    else
        ptr = alloc->malloc(alloc->ctx, nelem * elsize);
    if (ptr == NULL)
        return NULL;

    TABLES_LOCK();
    if (ADD_TRACE(ptr, nelem * elsize) < 0) {
        /* Failed to allocate a trace for the new memory block */
        TABLES_UNLOCK();
        alloc->free(alloc->ctx, ptr);
        return NULL;
    }
    TABLES_UNLOCK();
    return ptr;
}


static void*
tracemalloc_realloc(void *ctx, void *ptr, size_t new_size)
{
    PyMemAllocatorEx *alloc = (PyMemAllocatorEx *)ctx;
    void *ptr2;

    ptr2 = alloc->realloc(alloc->ctx, ptr, new_size);
    if (ptr2 == NULL)
        return NULL;

    if (ptr != NULL) {
        /* an existing memory block has been resized */

        TABLES_LOCK();

        /* tracemalloc_add_trace() updates the trace if there is already
           a trace at address ptr2 */
        if (ptr2 != ptr) {
            REMOVE_TRACE(ptr);
        }

        if (ADD_TRACE(ptr2, new_size) < 0) {
            /* Memory allocation failed. The error cannot be reported to
               the caller, because realloc() may already have shrunk the
               memory block and so removed bytes.

               This case is very unlikely: a hash entry has just been
               released, so the hash table should have at least one free entry.

               The GIL and the table lock ensures that only one thread is
               allocating memory. */
            Py_FatalError("tracemalloc_realloc() failed to allocate a trace");
        }
        TABLES_UNLOCK();
    }
    else {
        /* new allocation */

        TABLES_LOCK();
        if (ADD_TRACE(ptr2, new_size) < 0) {
            /* Failed to allocate a trace for the new memory block */
            TABLES_UNLOCK();
            alloc->free(alloc->ctx, ptr2);
            return NULL;
        }
        TABLES_UNLOCK();
    }
    return ptr2;
}


static void
tracemalloc_free(void *ctx, void *ptr)
{
    PyMemAllocatorEx *alloc = (PyMemAllocatorEx *)ctx;

    if (ptr == NULL)
        return;

     /* GIL cannot be locked in PyMem_RawFree() because it would introduce
        a deadlock in _PyThreadState_DeleteCurrent(). */

    alloc->free(alloc->ctx, ptr);

    TABLES_LOCK();
    REMOVE_TRACE(ptr);
    TABLES_UNLOCK();
}


static void*
tracemalloc_alloc_gil(int use_calloc, void *ctx, size_t nelem, size_t elsize)
{
    void *ptr;

    if (get_reentrant()) {
        PyMemAllocatorEx *alloc = (PyMemAllocatorEx *)ctx;
        if (use_calloc)
            return alloc->calloc(alloc->ctx, nelem, elsize);
        else
            return alloc->malloc(alloc->ctx, nelem * elsize);
    }

    /* Ignore reentrant call. PyObjet_Malloc() calls PyMem_Malloc() for
       allocations larger than 512 bytes, don't trace the same memory
       allocation twice. */
    set_reentrant(1);

    ptr = tracemalloc_alloc(use_calloc, ctx, nelem, elsize);

    set_reentrant(0);
    return ptr;
}


static void*
tracemalloc_malloc_gil(void *ctx, size_t size)
{
    return tracemalloc_alloc_gil(0, ctx, 1, size);
}


static void*
tracemalloc_calloc_gil(void *ctx, size_t nelem, size_t elsize)
{
    return tracemalloc_alloc_gil(1, ctx, nelem, elsize);
}


static void*
tracemalloc_realloc_gil(void *ctx, void *ptr, size_t new_size)
{
    void *ptr2;

    if (get_reentrant()) {
        /* Reentrant call to PyMem_Realloc() and PyMem_RawRealloc().
           Example: PyMem_RawRealloc() is called internally by pymalloc
           (_PyObject_Malloc() and  _PyObject_Realloc()) to allocate a new
           arena (new_arena()). */
        PyMemAllocatorEx *alloc = (PyMemAllocatorEx *)ctx;

        ptr2 = alloc->realloc(alloc->ctx, ptr, new_size);
        if (ptr2 != NULL && ptr != NULL) {
            TABLES_LOCK();
            REMOVE_TRACE(ptr);
            TABLES_UNLOCK();
        }
        return ptr2;
    }

    /* Ignore reentrant call. PyObjet_Realloc() calls PyMem_Realloc() for
       allocations larger than 512 bytes. Don't trace the same memory
       allocation twice. */
    set_reentrant(1);

    ptr2 = tracemalloc_realloc(ctx, ptr, new_size);

    set_reentrant(0);
    return ptr2;
}


#ifdef TRACE_RAW_MALLOC
static void*
tracemalloc_raw_alloc(int use_calloc, void *ctx, size_t nelem, size_t elsize)
{
    PyGILState_STATE gil_state;
    void *ptr;

    if (get_reentrant()) {
        PyMemAllocatorEx *alloc = (PyMemAllocatorEx *)ctx;
        if (use_calloc)
            return alloc->calloc(alloc->ctx, nelem, elsize);
        else
            return alloc->malloc(alloc->ctx, nelem * elsize);
    }

    /* Ignore reentrant call. PyGILState_Ensure() may call PyMem_RawMalloc()
       indirectly which would call PyGILState_Ensure() if reentrant are not
       disabled. */
    set_reentrant(1);

    gil_state = PyGILState_Ensure();
    ptr = tracemalloc_alloc(use_calloc, ctx, nelem, elsize);
    PyGILState_Release(gil_state);

    set_reentrant(0);
    return ptr;
}


static void*
tracemalloc_raw_malloc(void *ctx, size_t size)
{
    return tracemalloc_raw_alloc(0, ctx, 1, size);
}


static void*
tracemalloc_raw_calloc(void *ctx, size_t nelem, size_t elsize)
{
    return tracemalloc_raw_alloc(1, ctx, nelem, elsize);
}


static void*
tracemalloc_raw_realloc(void *ctx, void *ptr, size_t new_size)
{
    PyGILState_STATE gil_state;
    void *ptr2;

    if (get_reentrant()) {
        /* Reentrant call to PyMem_RawRealloc(). */
        PyMemAllocatorEx *alloc = (PyMemAllocatorEx *)ctx;

        ptr2 = alloc->realloc(alloc->ctx, ptr, new_size);

        if (ptr2 != NULL && ptr != NULL) {
            TABLES_LOCK();
            REMOVE_TRACE(ptr);
            TABLES_UNLOCK();
        }
        return ptr2;
    }

    /* Ignore reentrant call. PyGILState_Ensure() may call PyMem_RawMalloc()
       indirectly which would call PyGILState_Ensure() if reentrant calls are
       not disabled. */
    set_reentrant(1);

    gil_state = PyGILState_Ensure();
    ptr2 = tracemalloc_realloc(ctx, ptr, new_size);
    PyGILState_Release(gil_state);

    set_reentrant(0);
    return ptr2;
}
#endif   /* TRACE_RAW_MALLOC */


static void
tracemalloc_clear_filename(void *value)
{
    PyObject *filename = (PyObject *)value;
    Py_DECREF(filename);
}


/* reentrant flag must be set to call this function and GIL must be held */
static void
tracemalloc_clear_traces(void)
{
    /* The GIL protects variables against concurrent access */
    assert(PyGILState_Check());

    TABLES_LOCK();
    _Py_hashtable_clear(tracemalloc_traces);
    _Py_hashtable_clear(tracemalloc_domains);
    tracemalloc_traced_memory = 0;
    tracemalloc_peak_traced_memory = 0;
    TABLES_UNLOCK();

    _Py_hashtable_clear(tracemalloc_tracebacks);

    _Py_hashtable_clear(tracemalloc_filenames);
}


int
_PyTraceMalloc_Init(void)
{
    if (tracemalloc_config.initialized == TRACEMALLOC_FINALIZED) {
        PyErr_SetString(PyExc_RuntimeError,
                        "the tracemalloc module has been unloaded");
        return -1;
    }

    if (tracemalloc_config.initialized == TRACEMALLOC_INITIALIZED)
        return 0;

    PyMem_GetAllocator(PYMEM_DOMAIN_RAW, &allocators.raw);

#ifdef REENTRANT_THREADLOCAL
    if (PyThread_tss_create(&tracemalloc_reentrant_key) != 0) {
#ifdef MS_WINDOWS
        PyErr_SetFromWindowsErr(0);
#else
        PyErr_SetFromErrno(PyExc_OSError);
#endif
        return -1;
    }
#endif

#if defined(TRACE_RAW_MALLOC)
    if (tables_lock == NULL) {
        tables_lock = PyThread_allocate_lock();
        if (tables_lock == NULL) {
            PyErr_SetString(PyExc_RuntimeError, "cannot allocate lock");
            return -1;
        }
    }
#endif

    tracemalloc_filenames = hashtable_new(hashtable_hash_pyobject,
                                          hashtable_compare_unicode,
                                          tracemalloc_clear_filename, NULL);

    tracemalloc_tracebacks = hashtable_new(hashtable_hash_traceback,
                                           hashtable_compare_traceback,
                                           raw_free, NULL);

    tracemalloc_traces = tracemalloc_create_traces_table();
    tracemalloc_domains = tracemalloc_create_domains_table();

    if (tracemalloc_filenames == NULL || tracemalloc_tracebacks == NULL
       || tracemalloc_traces == NULL || tracemalloc_domains == NULL) {
        PyErr_NoMemory();
        return -1;
    }

    tracemalloc_empty_traceback.nframe = 1;
    tracemalloc_empty_traceback.total_nframe = 1;
    /* borrowed reference */
    tracemalloc_empty_traceback.frames[0].filename = &_Py_STR(anon_unknown);
    tracemalloc_empty_traceback.frames[0].lineno = 0;
    tracemalloc_empty_traceback.hash = traceback_hash(&tracemalloc_empty_traceback);

    tracemalloc_config.initialized = TRACEMALLOC_INITIALIZED;
    return 0;
}


static void
tracemalloc_deinit(void)
{
    if (tracemalloc_config.initialized != TRACEMALLOC_INITIALIZED)
        return;
    tracemalloc_config.initialized = TRACEMALLOC_FINALIZED;

    _PyTraceMalloc_Stop();

    /* destroy hash tables */
    _Py_hashtable_destroy(tracemalloc_domains);
    _Py_hashtable_destroy(tracemalloc_traces);
    _Py_hashtable_destroy(tracemalloc_tracebacks);
    _Py_hashtable_destroy(tracemalloc_filenames);

#if defined(TRACE_RAW_MALLOC)
    if (tables_lock != NULL) {
        PyThread_free_lock(tables_lock);
        tables_lock = NULL;
    }
#endif

#ifdef REENTRANT_THREADLOCAL
    PyThread_tss_delete(&tracemalloc_reentrant_key);
#endif
}


int
_PyTraceMalloc_Start(int max_nframe)
{
    PyMemAllocatorEx alloc;
    size_t size;

    if (max_nframe < 1 || (unsigned long) max_nframe > MAX_NFRAME) {
        PyErr_Format(PyExc_ValueError,
                     "the number of frames must be in range [1; %lu]",
                     MAX_NFRAME);
        return -1;
    }

    if (_PyTraceMalloc_Init() < 0) {
        return -1;
    }

    if (PyRefTracer_SetTracer(_PyTraceMalloc_TraceRef, NULL) < 0) {
        return -1;
    }

    if (tracemalloc_config.tracing) {
        /* hook already installed: do nothing */
        return 0;
    }

    tracemalloc_config.max_nframe = max_nframe;

    /* allocate a buffer to store a new traceback */
    size = TRACEBACK_SIZE(max_nframe);
    assert(tracemalloc_traceback == NULL);
    tracemalloc_traceback = raw_malloc(size);
    if (tracemalloc_traceback == NULL) {
        PyErr_NoMemory();
        return -1;
    }

#ifdef TRACE_RAW_MALLOC
    alloc.malloc = tracemalloc_raw_malloc;
    alloc.calloc = tracemalloc_raw_calloc;
    alloc.realloc = tracemalloc_raw_realloc;
    alloc.free = tracemalloc_free;

    alloc.ctx = &allocators.raw;
    PyMem_GetAllocator(PYMEM_DOMAIN_RAW, &allocators.raw);
    PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &alloc);
#endif

    alloc.malloc = tracemalloc_malloc_gil;
    alloc.calloc = tracemalloc_calloc_gil;
    alloc.realloc = tracemalloc_realloc_gil;
    alloc.free = tracemalloc_free;

    alloc.ctx = &allocators.mem;
    PyMem_GetAllocator(PYMEM_DOMAIN_MEM, &allocators.mem);
    PyMem_SetAllocator(PYMEM_DOMAIN_MEM, &alloc);

    alloc.ctx = &allocators.obj;
    PyMem_GetAllocator(PYMEM_DOMAIN_OBJ, &allocators.obj);
    PyMem_SetAllocator(PYMEM_DOMAIN_OBJ, &alloc);

    /* everything is ready: start tracing Python memory allocations */
    tracemalloc_config.tracing = 1;

    return 0;
}


void
_PyTraceMalloc_Stop(void)
{
    if (!tracemalloc_config.tracing)
        return;

    /* stop tracing Python memory allocations */
    tracemalloc_config.tracing = 0;

    /* unregister the hook on memory allocators */
#ifdef TRACE_RAW_MALLOC
    PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &allocators.raw);
#endif
    PyMem_SetAllocator(PYMEM_DOMAIN_MEM, &allocators.mem);
    PyMem_SetAllocator(PYMEM_DOMAIN_OBJ, &allocators.obj);

    tracemalloc_clear_traces();

    /* release memory */
    raw_free(tracemalloc_traceback);
    tracemalloc_traceback = NULL;
}



static PyObject*
frame_to_pyobject(frame_t *frame)
{
    PyObject *frame_obj, *lineno_obj;

    frame_obj = PyTuple_New(2);
    if (frame_obj == NULL)
        return NULL;

    PyTuple_SET_ITEM(frame_obj, 0, Py_NewRef(frame->filename));

    lineno_obj = PyLong_FromUnsignedLong(frame->lineno);
    if (lineno_obj == NULL) {
        Py_DECREF(frame_obj);
        return NULL;
    }
    PyTuple_SET_ITEM(frame_obj, 1, lineno_obj);

    return frame_obj;
}


static PyObject*
traceback_to_pyobject(traceback_t *traceback, _Py_hashtable_t *intern_table)
{
    PyObject *frames;

    if (intern_table != NULL) {
        frames = _Py_hashtable_get(intern_table, (const void *)traceback);
        if (frames) {
            return Py_NewRef(frames);
        }
    }

    frames = PyTuple_New(traceback->nframe);
    if (frames == NULL)
        return NULL;

    for (int i=0; i < traceback->nframe; i++) {
        PyObject *frame = frame_to_pyobject(&traceback->frames[i]);
        if (frame == NULL) {
            Py_DECREF(frames);
            return NULL;
        }
        PyTuple_SET_ITEM(frames, i, frame);
    }

    if (intern_table != NULL) {
        if (_Py_hashtable_set(intern_table, traceback, frames) < 0) {
            Py_DECREF(frames);
            PyErr_NoMemory();
            return NULL;
        }
        /* intern_table keeps a new reference to frames */
        Py_INCREF(frames);
    }
    return frames;
}


static PyObject*
trace_to_pyobject(unsigned int domain, const trace_t *trace,
                  _Py_hashtable_t *intern_tracebacks)
{
    PyObject *trace_obj = NULL;
    PyObject *obj;

    trace_obj = PyTuple_New(4);
    if (trace_obj == NULL)
        return NULL;

    obj = PyLong_FromSize_t(domain);
    if (obj == NULL) {
        Py_DECREF(trace_obj);
        return NULL;
    }
    PyTuple_SET_ITEM(trace_obj, 0, obj);

    obj = PyLong_FromSize_t(trace->size);
    if (obj == NULL) {
        Py_DECREF(trace_obj);
        return NULL;
    }
    PyTuple_SET_ITEM(trace_obj, 1, obj);

    obj = traceback_to_pyobject(trace->traceback, intern_tracebacks);
    if (obj == NULL) {
        Py_DECREF(trace_obj);
        return NULL;
    }
    PyTuple_SET_ITEM(trace_obj, 2, obj);

    obj = PyLong_FromUnsignedLong(trace->traceback->total_nframe);
    if (obj == NULL) {
        Py_DECREF(trace_obj);
        return NULL;
    }
    PyTuple_SET_ITEM(trace_obj, 3, obj);

    return trace_obj;
}


typedef struct {
    _Py_hashtable_t *traces;
    _Py_hashtable_t *domains;
    _Py_hashtable_t *tracebacks;
    PyObject *list;
    unsigned int domain;
} get_traces_t;


static int
tracemalloc_copy_trace(_Py_hashtable_t *traces,
                       const void *key, const void *value,
                       void *user_data)
{
    _Py_hashtable_t *traces2 = (_Py_hashtable_t *)user_data;

    trace_t *trace = (trace_t *)value;

    trace_t *trace2 = raw_malloc(sizeof(trace_t));
    if (trace2 == NULL) {
        return -1;
    }
    *trace2 = *trace;
    if (_Py_hashtable_set(traces2, key, trace2) < 0) {
        raw_free(trace2);
        return -1;
    }
    return 0;
}


static _Py_hashtable_t*
tracemalloc_copy_traces(_Py_hashtable_t *traces)
{
    _Py_hashtable_t *traces2 = tracemalloc_create_traces_table();
    if (traces2 == NULL) {
        return NULL;
    }

    int err = _Py_hashtable_foreach(traces,
                                    tracemalloc_copy_trace,
                                    traces2);
    if (err) {
        _Py_hashtable_destroy(traces2);
        return NULL;
    }
    return traces2;
}


static int
tracemalloc_copy_domain(_Py_hashtable_t *domains,
                        const void *key, const void *value,
                        void *user_data)
{
    _Py_hashtable_t *domains2 = (_Py_hashtable_t *)user_data;

    unsigned int domain = (unsigned int)FROM_PTR(key);
    _Py_hashtable_t *traces = (_Py_hashtable_t *)value;

    _Py_hashtable_t *traces2 = tracemalloc_copy_traces(traces);
    if (traces2 == NULL) {
        return -1;
    }
    if (_Py_hashtable_set(domains2, TO_PTR(domain), traces2) < 0) {
        _Py_hashtable_destroy(traces2);
        return -1;
    }
    return 0;
}


static _Py_hashtable_t*
tracemalloc_copy_domains(_Py_hashtable_t *domains)
{
    _Py_hashtable_t *domains2 = tracemalloc_create_domains_table();
    if (domains2 == NULL) {
        return NULL;
    }

    int err = _Py_hashtable_foreach(domains,
                                    tracemalloc_copy_domain,
                                    domains2);
    if (err) {
        _Py_hashtable_destroy(domains2);
        return NULL;
    }
    return domains2;
}


static int
tracemalloc_get_traces_fill(_Py_hashtable_t *traces,
                            const void *key, const void *value,
                            void *user_data)
{
    get_traces_t *get_traces = user_data;

    const trace_t *trace = (const trace_t *)value;

    PyObject *tuple = trace_to_pyobject(get_traces->domain, trace,
                                        get_traces->tracebacks);
    if (tuple == NULL) {
        return 1;
    }

    int res = PyList_Append(get_traces->list, tuple);
    Py_DECREF(tuple);
    if (res < 0) {
        return 1;
    }

    return 0;
}


static int
tracemalloc_get_traces_domain(_Py_hashtable_t *domains,
                              const void *key, const void *value,
                              void *user_data)
{
    get_traces_t *get_traces = user_data;

    unsigned int domain = (unsigned int)FROM_PTR(key);
    _Py_hashtable_t *traces = (_Py_hashtable_t *)value;

    get_traces->domain = domain;
    return _Py_hashtable_foreach(traces,
                                 tracemalloc_get_traces_fill,
                                 get_traces);
}


static void
tracemalloc_pyobject_decref(void *value)
{
    PyObject *obj = (PyObject *)value;
    Py_DECREF(obj);
}


static traceback_t*
tracemalloc_get_traceback(unsigned int domain, uintptr_t ptr)
{

    if (!tracemalloc_config.tracing)
        return NULL;

    trace_t *trace;
    TABLES_LOCK();
    _Py_hashtable_t *traces = tracemalloc_get_traces_table(domain);
    if (traces) {
        trace = _Py_hashtable_get(traces, TO_PTR(ptr));
    }
    else {
        trace = NULL;
    }
    TABLES_UNLOCK();

    if (!trace) {
        return NULL;
    }

    return trace->traceback;
}


#define PUTS(fd, str) (void)_Py_write_noraise(fd, str, (int)strlen(str))

static void
_PyMem_DumpFrame(int fd, frame_t * frame)
{
    PUTS(fd, "  File \"");
    _Py_DumpASCII(fd, frame->filename);
    PUTS(fd, "\", line ");
    _Py_DumpDecimal(fd, frame->lineno);
    PUTS(fd, "\n");
}

/* Dump the traceback where a memory block was allocated into file descriptor
   fd. The function may block on TABLES_LOCK() but it is unlikely. */
void
_PyMem_DumpTraceback(int fd, const void *ptr)
{
    traceback_t *traceback;
    int i;

    if (!tracemalloc_config.tracing) {
        PUTS(fd, "Enable tracemalloc to get the memory block "
                 "allocation traceback\n\n");
        return;
    }

    traceback = tracemalloc_get_traceback(DEFAULT_DOMAIN, (uintptr_t)ptr);
    if (traceback == NULL)
        return;

    PUTS(fd, "Memory block allocated at (most recent call first):\n");
    for (i=0; i < traceback->nframe; i++) {
        _PyMem_DumpFrame(fd, &traceback->frames[i]);
    }
    PUTS(fd, "\n");
}

#undef PUTS


static int
tracemalloc_get_tracemalloc_memory_cb(_Py_hashtable_t *domains,
                                      const void *key, const void *value,
                                      void *user_data)
{
    const _Py_hashtable_t *traces = value;
    size_t *size = (size_t*)user_data;
    *size += _Py_hashtable_size(traces);
    return 0;
}

int
PyTraceMalloc_Track(unsigned int domain, uintptr_t ptr,
                    size_t size)
{
    int res;
    PyGILState_STATE gil_state;

    if (!tracemalloc_config.tracing) {
        /* tracemalloc is not tracing: do nothing */
        return -2;
    }

    gil_state = PyGILState_Ensure();

    TABLES_LOCK();
    res = tracemalloc_add_trace(domain, ptr, size);
    TABLES_UNLOCK();

    PyGILState_Release(gil_state);
    return res;
}


int
PyTraceMalloc_Untrack(unsigned int domain, uintptr_t ptr)
{
    if (!tracemalloc_config.tracing) {
        /* tracemalloc is not tracing: do nothing */
        return -2;
    }

    TABLES_LOCK();
    tracemalloc_remove_trace(domain, ptr);
    TABLES_UNLOCK();

    return 0;
}


void
_PyTraceMalloc_Fini(void)
{
    assert(PyGILState_Check());
    tracemalloc_deinit();
}


/* If the object memory block is already traced, update its trace
   with the current Python traceback.

   Do nothing if tracemalloc is not tracing memory allocations
   or if the object memory block is not already traced. */
int
_PyTraceMalloc_TraceRef(PyObject *op, PyRefTracerEvent event, void* Py_UNUSED(ignore))
{
    if (event != PyRefTracer_CREATE) {
        return 0;
    }

    assert(PyGILState_Check());

    if (!tracemalloc_config.tracing) {
        /* tracemalloc is not tracing: do nothing */
        return -1;
    }

    PyTypeObject *type = Py_TYPE(op);
    const size_t presize = _PyType_PreHeaderSize(type);
    uintptr_t ptr = (uintptr_t)((char *)op - presize);

    int res = -1;

    TABLES_LOCK();
    trace_t *trace = _Py_hashtable_get(tracemalloc_traces, TO_PTR(ptr));
    if (trace != NULL) {
        /* update the traceback of the memory block */
        traceback_t *traceback = traceback_new();
        if (traceback != NULL) {
            trace->traceback = traceback;
            res = 0;
        }
    }
    /* else: cannot track the object, its memory block size is unknown */
    TABLES_UNLOCK();

    return res;
}


PyObject*
_PyTraceMalloc_GetTraceback(unsigned int domain, uintptr_t ptr)
{
    traceback_t *traceback;

    traceback = tracemalloc_get_traceback(domain, ptr);
    if (traceback == NULL)
        Py_RETURN_NONE;

    return traceback_to_pyobject(traceback, NULL);
}

int
_PyTraceMalloc_IsTracing(void)
{
    return tracemalloc_config.tracing;
}

void
_PyTraceMalloc_ClearTraces(void)
{

    if (!tracemalloc_config.tracing) {
        return;
    }
    set_reentrant(1);
    tracemalloc_clear_traces();
    set_reentrant(0);
}

PyObject *
_PyTraceMalloc_GetTraces(void)
{
    get_traces_t get_traces;
    get_traces.domain = DEFAULT_DOMAIN;
    get_traces.traces = NULL;
    get_traces.domains = NULL;
    get_traces.tracebacks = NULL;
    get_traces.list = PyList_New(0);
    if (get_traces.list == NULL)
        goto error;

    if (!tracemalloc_config.tracing)
        return get_traces.list;

    /* the traceback hash table is used temporarily to intern traceback tuple
       of (filename, lineno) tuples */
    get_traces.tracebacks = hashtable_new(_Py_hashtable_hash_ptr,
                                          _Py_hashtable_compare_direct,
                                          NULL, tracemalloc_pyobject_decref);
    if (get_traces.tracebacks == NULL) {
        goto no_memory;
    }

    // Copy all traces so tracemalloc_get_traces_fill() doesn't have to disable
    // temporarily tracemalloc which would impact other threads and so would
    // miss allocations while get_traces() is called.
    TABLES_LOCK();
    get_traces.traces = tracemalloc_copy_traces(tracemalloc_traces);
    TABLES_UNLOCK();

    if (get_traces.traces == NULL) {
        goto no_memory;
    }

    TABLES_LOCK();
    get_traces.domains = tracemalloc_copy_domains(tracemalloc_domains);
    TABLES_UNLOCK();

    if (get_traces.domains == NULL) {
        goto no_memory;
    }

    // Convert traces to a list of tuples
    set_reentrant(1);
    int err = _Py_hashtable_foreach(get_traces.traces,
                                    tracemalloc_get_traces_fill,
                                    &get_traces);
    if (!err) {
        err = _Py_hashtable_foreach(get_traces.domains,
                                    tracemalloc_get_traces_domain,
                                    &get_traces);
    }
    set_reentrant(0);
    if (err) {
        goto error;
    }

    goto finally;

no_memory:
    PyErr_NoMemory();

error:
    Py_CLEAR(get_traces.list);

finally:
    if (get_traces.tracebacks != NULL) {
        _Py_hashtable_destroy(get_traces.tracebacks);
    }
    if (get_traces.traces != NULL) {
        _Py_hashtable_destroy(get_traces.traces);
    }
    if (get_traces.domains != NULL) {
        _Py_hashtable_destroy(get_traces.domains);
    }

    return get_traces.list;
}

PyObject *
_PyTraceMalloc_GetObjectTraceback(PyObject *obj)
/*[clinic end generated code: output=41ee0553a658b0aa input=29495f1b21c53212]*/
{
    PyTypeObject *type;
    traceback_t *traceback;

    type = Py_TYPE(obj);
    const size_t presize = _PyType_PreHeaderSize(type);
    uintptr_t ptr = (uintptr_t)((char *)obj - presize);

    traceback = tracemalloc_get_traceback(DEFAULT_DOMAIN, ptr);
    if (traceback == NULL) {
        Py_RETURN_NONE;
    }

    return traceback_to_pyobject(traceback, NULL);
}

int _PyTraceMalloc_GetTracebackLimit(void) {
    return tracemalloc_config.max_nframe;
}

size_t
_PyTraceMalloc_GetMemory(void) {

    size_t size;

    size = _Py_hashtable_size(tracemalloc_tracebacks);
    size += _Py_hashtable_size(tracemalloc_filenames);

    TABLES_LOCK();
    size += _Py_hashtable_size(tracemalloc_traces);
    _Py_hashtable_foreach(tracemalloc_domains,
                          tracemalloc_get_tracemalloc_memory_cb, &size);
    TABLES_UNLOCK();
    return size;
}


PyObject *
_PyTraceMalloc_GetTracedMemory(void)
{
    Py_ssize_t size, peak_size;

    if (!tracemalloc_config.tracing)
        return Py_BuildValue("ii", 0, 0);

    TABLES_LOCK();
    size = tracemalloc_traced_memory;
    peak_size = tracemalloc_peak_traced_memory;
    TABLES_UNLOCK();

    return Py_BuildValue("nn", size, peak_size);
}

void
_PyTraceMalloc_ResetPeak(void)
{
    if (!tracemalloc_config.tracing) {
        return;
    }
    TABLES_LOCK();
    tracemalloc_peak_traced_memory = tracemalloc_traced_memory;
    TABLES_UNLOCK();
}
generated by cgit v0.12 at 2025-07-13 14:16:54 (GMT)