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bpo-1635741 port _lsprof to multi-phase init (PEP 489) #22220

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Merged
merged 3 commits into from
Sep 23, 2020
Merged

bpo-1635741 port _lsprof to multi-phase init (PEP 489) #22220

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c818a4e
convert lsprof to multi-phase init
koubaa Sep 21, 2020
1a01fed
blurb
koubaa Sep 12, 2020
ce40825
update based on review
koubaa Sep 23, 2020
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Core and Builtins/2020-09-12-18-34-34.bpo-1635741.lh335O.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
Port the :mod:`_lsprof` extension module to multi-phase initialization
(:pep:`489`).
205 changes: 117 additions & 88 deletions Modules/_lsprof.c
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Original file line number Diff line number Diff line change
Expand Up @@ -55,12 +55,22 @@ module _lsprof
class _lsprof.Profiler "ProfilerObject *" "&ProfilerType"
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=e349ac952152f336]*/
static PyTypeObject PyProfiler_Type;

#include "clinic/_lsprof.c.h"

#define PyProfiler_Check(op) PyObject_TypeCheck(op, &PyProfiler_Type)
#define PyProfiler_CheckExact(op) Py_IS_TYPE(op, &PyProfiler_Type)
typedef struct {
PyTypeObject *profiler_type;
PyTypeObject *stats_entry_type;
PyTypeObject *stats_subentry_type;
} _lsprof_state;

static inline _lsprof_state*
_lsprof_get_state(PyObject *module)
{
void *state = PyModule_GetState(module);
assert(state != NULL);
return (_lsprof_state *)state;
}

/*** External Timers ***/

Expand Down Expand Up @@ -479,27 +489,23 @@ static PyStructSequence_Field profiler_subentry_fields[] = {

static PyStructSequence_Desc profiler_entry_desc = {
"_lsprof.profiler_entry", /* name */
NULL, /* doc */
"", /* doc */
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IMO PyType_FromSpec() should accept tp_doc=NULL, I created: https://bugs.python.org/issue41832

I don't ask you to change your PR, "" vs NULL can be changed again later.

profiler_entry_fields,
6
};

static PyStructSequence_Desc profiler_subentry_desc = {
"_lsprof.profiler_subentry", /* name */
NULL, /* doc */
"", /* doc */
profiler_subentry_fields,
5
};

static int initialized;
static PyTypeObject StatsEntryType;
static PyTypeObject StatsSubEntryType;


typedef struct {
PyObject *list;
PyObject *sublist;
double factor;
_lsprof_state *state;
} statscollector_t;

static int statsForSubEntry(rotating_node_t *node, void *arg)
Expand All @@ -509,7 +515,7 @@ static int statsForSubEntry(rotating_node_t *node, void *arg)
ProfilerEntry *entry = (ProfilerEntry*) sentry->header.key;
int err;
PyObject *sinfo;
sinfo = PyObject_CallFunction((PyObject*) &StatsSubEntryType,
sinfo = PyObject_CallFunction((PyObject*) collect->state->stats_subentry_type,
"((Olldd))",
entry->userObj,
sentry->callcount,
Expand Down Expand Up @@ -547,7 +553,7 @@ static int statsForEntry(rotating_node_t *node, void *arg)
collect->sublist = Py_None;
}

info = PyObject_CallFunction((PyObject*) &StatsEntryType,
info = PyObject_CallFunction((PyObject*) collect->state->stats_entry_type,
"((OllddO))",
entry->userObj,
entry->callcount,
Expand All @@ -566,6 +572,8 @@ static int statsForEntry(rotating_node_t *node, void *arg)
/*[clinic input]
_lsprof.Profiler.getstats

cls: defining_class

list of profiler_entry objects.

getstats() -> list of profiler_entry objects
Expand All @@ -592,10 +600,11 @@ profiler_subentry objects:
[clinic start generated code]*/

static PyObject *
_lsprof_Profiler_getstats_impl(ProfilerObject *self)
/*[clinic end generated code: output=9461b451e9ef0f24 input=ade04fa384ce450a]*/
_lsprof_Profiler_getstats_impl(ProfilerObject *self, PyTypeObject *cls)
/*[clinic end generated code: output=1806ef720019ee03 input=445e193ef4522902]*/
{
statscollector_t collect;
collect.state = PyType_GetModuleState(cls);
if (pending_exception(self)) {
return NULL;
}
Expand Down Expand Up @@ -735,7 +744,9 @@ profiler_dealloc(ProfilerObject *op)
flush_unmatched(op);
clearEntries(op);
Py_XDECREF(op->externalTimer);
Py_TYPE(op)->tp_free(op);
PyTypeObject *tp = Py_TYPE(op);
tp->tp_free(op);
Py_DECREF(tp);
}

static int
Expand Down Expand Up @@ -782,91 +793,109 @@ Profiler(timer=None, timeunit=None, subcalls=True, builtins=True)\n\
is, in seconds).\n\
");

static PyTypeObject PyProfiler_Type = {
PyVarObject_HEAD_INIT(NULL, 0)
"_lsprof.Profiler", /* tp_name */
sizeof(ProfilerObject), /* tp_basicsize */
0, /* tp_itemsize */
(destructor)profiler_dealloc, /* tp_dealloc */
0, /* tp_vectorcall_offset */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_as_async */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
profiler_doc, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
profiler_methods, /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc)profiler_init, /* tp_init */
PyType_GenericAlloc, /* tp_alloc */
PyType_GenericNew, /* tp_new */
PyObject_Del, /* tp_free */
static PyType_Slot _lsprof_profiler_type_spec_slots[] = {
{Py_tp_doc, (void *)profiler_doc},
{Py_tp_methods, profiler_methods},
{Py_tp_dealloc, profiler_dealloc},
{Py_tp_init, profiler_init},
{Py_tp_alloc, PyType_GenericAlloc},
{Py_tp_new, PyType_GenericNew},
{Py_tp_free, PyObject_Del},
{0, 0}
};

static PyType_Spec _lsprof_profiler_type_spec = {
.name = "_lsprof.Profiler",
.basicsize = sizeof(ProfilerObject),
.flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
.slots = _lsprof_profiler_type_spec_slots,
};

static PyMethodDef moduleMethods[] = {
{NULL, NULL}
};

static int
_lsprof_traverse(PyObject *module, visitproc visit, void *arg)
{
_lsprof_state *state = _lsprof_get_state(module);
Py_VISIT(state->profiler_type);
Py_VISIT(state->stats_entry_type);
Py_VISIT(state->stats_subentry_type);
return 0;
}

static int
_lsprof_clear(PyObject *module)
{
_lsprof_state *state = _lsprof_get_state(module);
Py_CLEAR(state->profiler_type);
Py_CLEAR(state->stats_entry_type);
Py_CLEAR(state->stats_subentry_type);
return 0;
}

static void
_lsprof_free(void *module)
{
_lsprof_clear((PyObject *)module);
}

static int
_lsprof_exec(PyObject *module)
{
_lsprof_state *state = PyModule_GetState(module);

state->profiler_type = (PyTypeObject *)PyType_FromModuleAndSpec(
module, &_lsprof_profiler_type_spec, NULL);

if (state->profiler_type == NULL) {
return -1;
}

if (PyModule_AddType(module, state->profiler_type) < 0) {
return -1;
}

state->stats_entry_type = PyStructSequence_NewType(&profiler_entry_desc);
if (state->stats_entry_type == NULL) {
return -1;
}

state->stats_subentry_type = PyStructSequence_NewType(&profiler_subentry_desc);
if (state->stats_subentry_type == NULL) {
return -1;
}

if (PyModule_AddType(module, state->stats_entry_type) < 0) {
return -1;
}
if (PyModule_AddType(module, state->stats_subentry_type) < 0) {
return -1;
}

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Thanks, the new code is more regular (create type, add type, create type, add type, ...) and so easier to read!

return 0;
}

static PyModuleDef_Slot _lsprofslots[] = {
{Py_mod_exec, _lsprof_exec},
{0, NULL}
};

static struct PyModuleDef _lsprofmodule = {
PyModuleDef_HEAD_INIT,
"_lsprof",
"Fast profiler",
-1,
moduleMethods,
NULL,
NULL,
NULL,
NULL
.m_name = "_lsprof",
.m_doc = "Fast profiler",
.m_size = sizeof(_lsprof_state),
.m_methods = moduleMethods,
.m_slots = _lsprofslots,
.m_traverse = _lsprof_traverse,
.m_clear = _lsprof_clear,
.m_free = _lsprof_free
};

PyMODINIT_FUNC
PyInit__lsprof(void)
{
PyObject *module, *d;
module = PyModule_Create(&_lsprofmodule);
if (module == NULL)
return NULL;
d = PyModule_GetDict(module);
if (PyType_Ready(&PyProfiler_Type) < 0)
return NULL;
PyDict_SetItemString(d, "Profiler", (PyObject *)&PyProfiler_Type);

if (!initialized) {
if (PyStructSequence_InitType2(&StatsEntryType,
&profiler_entry_desc) < 0)
return NULL;
if (PyStructSequence_InitType2(&StatsSubEntryType,
&profiler_subentry_desc) < 0)
return NULL;
}
Py_INCREF((PyObject*) &StatsEntryType);
Py_INCREF((PyObject*) &StatsSubEntryType);
PyModule_AddObject(module, "profiler_entry",
(PyObject*) &StatsEntryType);
PyModule_AddObject(module, "profiler_subentry",
(PyObject*) &StatsSubEntryType);
initialized = 1;
return module;
return PyModuleDef_Init(&_lsprofmodule);
}
21 changes: 16 additions & 5 deletions Modules/clinic/_lsprof.c.h
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