cpython/Modules/_lsprof.c at 3.15 · python/cpython · GitHub

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#ifndef Py_BUILD_CORE_BUILTIN

# define Py_BUILD_CORE_MODULE 1

#endif

#include "Python.h"

#include "pycore_call.h" // _PyObject_CallNoArgs()

#include "pycore_ceval.h" // _PyEval_SetProfile()

#include "pycore_pystate.h" // _PyThreadState_GET()

#include "pycore_time.h" // _PyTime_FromSecondsObject()

#include "pycore_typeobject.h" // _PyType_GetModuleState()

#include "pycore_unicodeobject.h" // _PyUnicode_EqualToASCIIString()

#include "rotatingtree.h"

/************************************************************/

/* Written by Brett Rosen and Ted Czotter */

struct _ProfilerEntry;

/* represents a function called from another function */

typedef struct _ProfilerSubEntry {

rotating_node_t header;

PyTime_t tt;

PyTime_t it;

long callcount;

long recursivecallcount;

long recursionLevel;

} ProfilerSubEntry;

/* represents a function or user defined block */

typedef struct _ProfilerEntry {

rotating_node_t header;

PyObject *userObj; /* PyCodeObject, or a descriptive str for builtins */

PyTime_t tt; /* total time in this entry */

PyTime_t it; /* inline time in this entry (not in subcalls) */

long callcount; /* how many times this was called */

long recursivecallcount; /* how many times called recursively */

long recursionLevel;

rotating_node_t *calls;

} ProfilerEntry;

typedef struct _ProfilerContext {

PyTime_t t0;

PyTime_t subt;

struct _ProfilerContext *previous;

ProfilerEntry *ctxEntry;

} ProfilerContext;

typedef struct {

PyObject_HEAD

rotating_node_t *profilerEntries;

ProfilerContext *currentProfilerContext;

ProfilerContext *freelistProfilerContext;

int flags;

PyObject *externalTimer;

double externalTimerUnit;

int tool_id;

PyObject* missing;

} ProfilerObject;

#define ProfilerObject_CAST(op) ((ProfilerObject *)(op))

#define POF_ENABLED 0x001

#define POF_SUBCALLS 0x002

#define POF_BUILTINS 0x004

#define POF_EXT_TIMER 0x008

#define POF_NOMEMORY 0x100

/*[clinic input]

module _lsprof

class _lsprof.Profiler "ProfilerObject *" "&ProfilerType"

[clinic start generated code]*/

/*[clinic end generated code: output=da39a3ee5e6b4b0d input=e349ac952152f336]*/

#include "clinic/_lsprof.c.h"

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 ***/

static PyTime_t CallExternalTimer(ProfilerObject *pObj)

{

PyObject *o = NULL;

// External timer can do arbitrary things so we need a flag to prevent

// horrible things to happen

pObj->flags |= POF_EXT_TIMER;

o = _PyObject_CallNoArgs(pObj->externalTimer);

pObj->flags &= ~POF_EXT_TIMER;

if (o == NULL) {

PyErr_FormatUnraisable("Exception ignored while calling "

"_lsprof timer %R", pObj->externalTimer);

return 0;

}

PyTime_t result;

int err;

if (pObj->externalTimerUnit > 0.0) {

/* interpret the result as an integer that will be scaled

in profiler_getstats() */

err = PyLong_AsInt64(o, &result);

}

else {

/* interpret the result as a double measured in seconds.

As the profiler works with PyTime_t internally

we convert it to a large integer */

err = _PyTime_FromSecondsObject(&result, o, _PyTime_ROUND_FLOOR);

}

Py_DECREF(o);

if (err < 0) {

PyErr_FormatUnraisable("Exception ignored while calling "

"_lsprof timer %R", pObj->externalTimer);

return 0;

}

return result;

}

static inline PyTime_t

call_timer(ProfilerObject *pObj)

{

if (pObj->externalTimer != NULL) {

return CallExternalTimer(pObj);

}

else {

PyTime_t t;

(void)PyTime_PerfCounterRaw(&t);

return t;

}

/*** ProfilerObject ***/

static PyObject *

normalizeUserObj(PyObject *obj)

{

PyCFunctionObject *fn;

if (!PyCFunction_Check(obj)) {

return Py_NewRef(obj);

}

/* Replace built-in function objects with a descriptive string

because of built-in methods -- keeping a reference to

__self__ is probably not a good idea. */

fn = (PyCFunctionObject *)obj;

if (fn->m_self == NULL) {

/* built-in function: look up the module name */

PyObject *mod = fn->m_module;

PyObject *modname = NULL;

if (mod != NULL) {

if (PyUnicode_Check(mod)) {

modname = Py_NewRef(mod);

}

else if (PyModule_Check(mod)) {

modname = PyModule_GetNameObject(mod);

if (modname == NULL)

PyErr_Clear();

}

if (modname != NULL) {

if (!_PyUnicode_EqualToASCIIString(modname, "builtins")) {

PyObject *result;

result = PyUnicode_FromFormat("<%U.%s>", modname,

fn->m_ml->ml_name);

Py_DECREF(modname);

return result;

}

Py_DECREF(modname);

}

return PyUnicode_FromFormat("<%s>", fn->m_ml->ml_name);

}

else {

/* built-in method: try to return

repr(getattr(type(__self__), __name__))

PyObject *self = fn->m_self;

PyObject *name = PyUnicode_FromString(fn->m_ml->ml_name);

PyObject *modname = fn->m_module;

if (name != NULL) {

PyObject *mo = _PyType_LookupRef(Py_TYPE(self), name);

Py_DECREF(name);

if (mo != NULL) {

PyObject *res = PyObject_Repr(mo);

Py_DECREF(mo);

if (res != NULL)

return res;

}

/* Otherwise, use __module__ */

PyErr_Clear();

if (modname != NULL && PyUnicode_Check(modname))

return PyUnicode_FromFormat("<built-in method %S.%s>",

modname, fn->m_ml->ml_name);

else

return PyUnicode_FromFormat("<built-in method %s>",

fn->m_ml->ml_name);

}

static ProfilerEntry*

newProfilerEntry(ProfilerObject *pObj, void *key, PyObject *userObj)

{

ProfilerEntry *self;

self = (ProfilerEntry*) PyMem_Malloc(sizeof(ProfilerEntry));

if (self == NULL) {

pObj->flags |= POF_NOMEMORY;

return NULL;

}

userObj = normalizeUserObj(userObj);

if (userObj == NULL) {

PyErr_Clear();

PyMem_Free(self);

pObj->flags |= POF_NOMEMORY;

return NULL;

}

self->header.key = key;

self->userObj = userObj;

self->tt = 0;

self->it = 0;

self->callcount = 0;

self->recursivecallcount = 0;

self->recursionLevel = 0;

self->calls = EMPTY_ROTATING_TREE;

RotatingTree_Add(&pObj->profilerEntries, &self->header);

return self;

}

static ProfilerEntry*

getEntry(ProfilerObject *pObj, void *key)

{

return (ProfilerEntry*) RotatingTree_Get(&pObj->profilerEntries, key);

}

static ProfilerSubEntry *

getSubEntry(ProfilerObject *pObj, ProfilerEntry *caller, ProfilerEntry* entry)

{

return (ProfilerSubEntry*) RotatingTree_Get(&caller->calls,

(void *)entry);

}

static ProfilerSubEntry *

newSubEntry(ProfilerObject *pObj, ProfilerEntry *caller, ProfilerEntry* entry)

{

ProfilerSubEntry *self;

self = (ProfilerSubEntry*) PyMem_Malloc(sizeof(ProfilerSubEntry));

if (self == NULL) {

pObj->flags |= POF_NOMEMORY;

return NULL;

}

self->header.key = (void *)entry;

self->tt = 0;

self->it = 0;

self->callcount = 0;

self->recursivecallcount = 0;

self->recursionLevel = 0;

RotatingTree_Add(&caller->calls, &self->header);

return self;

}

static int freeSubEntry(rotating_node_t *header, void *arg)

{

ProfilerSubEntry *subentry = (ProfilerSubEntry*) header;

PyMem_Free(subentry);

return 0;

}

static int freeEntry(rotating_node_t *header, void *arg)

{

ProfilerEntry *entry = (ProfilerEntry*) header;

RotatingTree_Enum(entry->calls, freeSubEntry, NULL);

Py_DECREF(entry->userObj);

PyMem_Free(entry);

return 0;

}

static void clearEntries(ProfilerObject *pObj)

{

RotatingTree_Enum(pObj->profilerEntries, freeEntry, NULL);

pObj->profilerEntries = EMPTY_ROTATING_TREE;

/* release the memory hold by the ProfilerContexts */

while (pObj->currentProfilerContext) {

ProfilerContext *pContext = pObj->currentProfilerContext;

pObj->currentProfilerContext = pContext->previous;

PyMem_Free(pContext);

}

while (pObj->freelistProfilerContext) {

ProfilerContext *c = pObj->freelistProfilerContext;

pObj->freelistProfilerContext = c->previous;

PyMem_Free(c);

}

pObj->freelistProfilerContext = NULL;

}

static void

initContext(ProfilerObject *pObj, ProfilerContext *self, ProfilerEntry *entry)

{

self->ctxEntry = entry;

self->subt = 0;

self->previous = pObj->currentProfilerContext;

pObj->currentProfilerContext = self;

++entry->recursionLevel;

if ((pObj->flags & POF_SUBCALLS) && self->previous) {

/* find or create an entry for me in my caller's entry */

ProfilerEntry *caller = self->previous->ctxEntry;

ProfilerSubEntry *subentry = getSubEntry(pObj, caller, entry);

if (subentry == NULL)

subentry = newSubEntry(pObj, caller, entry);

if (subentry)

++subentry->recursionLevel;

}

self->t0 = call_timer(pObj);

}

static void

Stop(ProfilerObject *pObj, ProfilerContext *self, ProfilerEntry *entry)

{

PyTime_t tt = call_timer(pObj) - self->t0;

PyTime_t it = tt - self->subt;

if (self->previous)

self->previous->subt += tt;

pObj->currentProfilerContext = self->previous;

if (--entry->recursionLevel == 0)

entry->tt += tt;

else

++entry->recursivecallcount;

entry->it += it;

entry->callcount++;

if ((pObj->flags & POF_SUBCALLS) && self->previous) {

/* find or create an entry for me in my caller's entry */

ProfilerEntry *caller = self->previous->ctxEntry;

ProfilerSubEntry *subentry = getSubEntry(pObj, caller, entry);

if (subentry) {

if (--subentry->recursionLevel == 0)

subentry->tt += tt;

else

++subentry->recursivecallcount;

subentry->it += it;

++subentry->callcount;

}

static void

ptrace_enter_call(PyObject *self, void *key, PyObject *userObj)

{

/* entering a call to the function identified by 'key'

(which can be a PyCodeObject or a PyMethodDef pointer) */

ProfilerObject *pObj = (ProfilerObject*)self;

ProfilerEntry *profEntry;

ProfilerContext *pContext;

/* Events raised by the external timer must be ignored: it can run

arbitrary code while a context is still being unwound. */

if (pObj->flags & POF_EXT_TIMER) {

return;

}

/* In the case of entering a generator expression frame via a

* throw (gen_send_ex(.., 1)), we may already have an

* Exception set here. We must not mess around with this

* exception, and some of the code under here assumes that

* PyErr_* is its own to mess around with, so we have to

* save and restore any current exception. */

PyObject *exc = PyErr_GetRaisedException();

profEntry = getEntry(pObj, key);

if (profEntry == NULL) {

profEntry = newProfilerEntry(pObj, key, userObj);

if (profEntry == NULL)

goto restorePyerr;

}

/* grab a ProfilerContext out of the free list */

pContext = pObj->freelistProfilerContext;

if (pContext) {

pObj->freelistProfilerContext = pContext->previous;

}

else {

/* free list exhausted, allocate a new one */

pContext = (ProfilerContext*)

PyMem_Malloc(sizeof(ProfilerContext));

if (pContext == NULL) {

pObj->flags |= POF_NOMEMORY;

goto restorePyerr;

}

initContext(pObj, pContext, profEntry);

restorePyerr:

PyErr_SetRaisedException(exc);

}

static void

ptrace_leave_call(PyObject *self, void *key)

{

/* leaving a call to the function identified by 'key' */

ProfilerObject *pObj = (ProfilerObject*)self;

ProfilerEntry *profEntry;

ProfilerContext *pContext;

if (pObj->flags & POF_EXT_TIMER) {

return;

}

pContext = pObj->currentProfilerContext;

if (pContext == NULL)

return;

profEntry = getEntry(pObj, key);

if (profEntry) {

Stop(pObj, pContext, profEntry);

}

else {

pObj->currentProfilerContext = pContext->previous;

}

/* put pContext into the free list */

pContext->previous = pObj->freelistProfilerContext;

pObj->freelistProfilerContext = pContext;

}

static int

pending_exception(ProfilerObject *pObj)

{

if (pObj->flags & POF_NOMEMORY) {

pObj->flags -= POF_NOMEMORY;

PyErr_SetString(PyExc_MemoryError,

"memory was exhausted while profiling");

return -1;

}

return 0;

}

/************************************************************/

static PyStructSequence_Field profiler_entry_fields[] = {

{"code", "code object or built-in function name"},

{"callcount", "how many times this was called"},

{"reccallcount", "how many times called recursively"},

{"totaltime", "total time in this entry"},

{"inlinetime", "inline time in this entry (not in subcalls)"},

{"calls", "details of the calls"},

{0}

};

static PyStructSequence_Field profiler_subentry_fields[] = {

{"code", "called code object or built-in function name"},

{"callcount", "how many times this is called"},

{"reccallcount", "how many times this is called recursively"},

{"totaltime", "total time spent in this call"},

{"inlinetime", "inline time (not in further subcalls)"},

{0}

};

static PyStructSequence_Desc profiler_entry_desc = {

.name = "_lsprof.profiler_entry",

.fields = profiler_entry_fields,

.doc = NULL,

.n_in_sequence = 6

};

static PyStructSequence_Desc profiler_subentry_desc = {

.name = "_lsprof.profiler_subentry",

.fields = profiler_subentry_fields,

.doc = NULL,

.n_in_sequence = 5

};

typedef struct {

PyObject *list;

PyObject *sublist;

double factor;

_lsprof_state *state;

} statscollector_t;

static int statsForSubEntry(rotating_node_t *node, void *arg)

{

ProfilerSubEntry *sentry = (ProfilerSubEntry*) node;

statscollector_t *collect = (statscollector_t*) arg;

ProfilerEntry *entry = (ProfilerEntry*) sentry->header.key;

int err;

PyObject *sinfo;

sinfo = PyObject_CallFunction((PyObject*) collect->state->stats_subentry_type,

"((Olldd))",

entry->userObj,

sentry->callcount,

sentry->recursivecallcount,

collect->factor * sentry->tt,

collect->factor * sentry->it);

if (sinfo == NULL)

return -1;

err = PyList_Append(collect->sublist, sinfo);

Py_DECREF(sinfo);

return err;

}

static int statsForEntry(rotating_node_t *node, void *arg)

{

ProfilerEntry *entry = (ProfilerEntry*) node;

statscollector_t *collect = (statscollector_t*) arg;

PyObject *info;

int err;

if (entry->callcount == 0)

return 0; /* skip */

if (entry->calls != EMPTY_ROTATING_TREE) {

collect->sublist = PyList_New(0);

if (collect->sublist == NULL)

return -1;

if (RotatingTree_Enum(entry->calls,

statsForSubEntry, collect) != 0) {

Py_DECREF(collect->sublist);

return -1;

}

else {

collect->sublist = Py_NewRef(Py_None);

}

info = PyObject_CallFunction((PyObject*) collect->state->stats_entry_type,

"((OllddO))",

entry->userObj,

entry->callcount,

entry->recursivecallcount,

collect->factor * entry->tt,

collect->factor * entry->it,

collect->sublist);

Py_DECREF(collect->sublist);

if (info == NULL)

return -1;

err = PyList_Append(collect->list, info);

Py_DECREF(info);

return err;

}

/*[clinic input]

@critical_section

_lsprof.Profiler.getstats

cls: defining_class

list of profiler_entry objects.

getstats() -> list of profiler_entry objects

Return all information collected by the profiler.

Each profiler_entry is a tuple-like object with the

following attributes:

code code object

callcount how many times this was called

reccallcount how many times called recursively

totaltime total time in this entry

inlinetime inline time in this entry (not in subcalls)

calls details of the calls

The calls attribute is either None or a list of

profiler_subentry objects:

code called code object

callcount how many times this is called

reccallcount how many times this is called recursively

totaltime total time spent in this call

inlinetime inline time (not in further subcalls)

[clinic start generated code]*/

static PyObject *

_lsprof_Profiler_getstats_impl(ProfilerObject *self, PyTypeObject *cls)

/*[clinic end generated code: output=1806ef720019ee03 input=3dc69eb85ed73d91]*/

{

statscollector_t collect;

collect.state = _PyType_GetModuleState(cls);

if (pending_exception(self)) {

return NULL;

}

if (!self->externalTimer || self->externalTimerUnit == 0.0) {

PyTime_t onesec = _PyTime_FromSeconds(1);

collect.factor = (double)1 / onesec;

}

else {

collect.factor = self->externalTimerUnit;

}

collect.list = PyList_New(0);

if (collect.list == NULL)

return NULL;

if (RotatingTree_Enum(self->profilerEntries, statsForEntry, &collect)

!= 0) {

Py_DECREF(collect.list);

return NULL;

}

return collect.list;

}

static int

setSubcalls(ProfilerObject *pObj, int nvalue)

{

if (nvalue == 0)

pObj->flags &= ~POF_SUBCALLS;

else if (nvalue > 0)

pObj->flags |= POF_SUBCALLS;

return 0;

}

static int

setBuiltins(ProfilerObject *pObj, int nvalue)

{

if (nvalue == 0)

pObj->flags &= ~POF_BUILTINS;

else if (nvalue > 0) {

pObj->flags |= POF_BUILTINS;

}

return 0;

}

/*[clinic input]

@critical_section

_lsprof.Profiler._pystart_callback

code: object

instruction_offset: object

[clinic start generated code]*/

static PyObject *

_lsprof_Profiler__pystart_callback_impl(ProfilerObject *self, PyObject *code,

PyObject *instruction_offset)

/*[clinic end generated code: output=5fec8b7ad5ed25e8 input=b61a0e79cf1f8499]*/

{

ptrace_enter_call((PyObject*)self, (void *)code, code);

Py_RETURN_NONE;

}

/*[clinic input]

@critical_section

_lsprof.Profiler._pythrow_callback

code: object

instruction_offset: object

exception: object

[clinic start generated code]*/

static PyObject *

_lsprof_Profiler__pythrow_callback_impl(ProfilerObject *self, PyObject *code,

PyObject *instruction_offset,

PyObject *exception)

/*[clinic end generated code: output=0a32988919dfb94c input=60c7f272206d3758]*/

{

ptrace_enter_call((PyObject*)self, (void *)code, code);

Py_RETURN_NONE;

}

/*[clinic input]

@critical_section

_lsprof.Profiler._pyreturn_callback

code: object

instruction_offset: object

retval: object

[clinic start generated code]*/

static PyObject *

_lsprof_Profiler__pyreturn_callback_impl(ProfilerObject *self,

PyObject *code,

PyObject *instruction_offset,

PyObject *retval)

/*[clinic end generated code: output=9e2f6fc1b882c51e input=0ddcc1ec53faa928]*/

{

ptrace_leave_call((PyObject*)self, (void *)code);

Py_RETURN_NONE;

}

PyObject* get_cfunc_from_callable(PyObject* callable, PyObject* self_arg, PyObject* missing)

{

// return a new reference

if (PyCFunction_Check(callable)) {

Py_INCREF(callable);

return (PyObject*)((PyCFunctionObject *)callable);

}

if (Py_TYPE(callable) == &PyMethodDescr_Type) {

/* For backwards compatibility need to

* convert to builtin method */

/* If no arg, skip */

if (self_arg == missing) {

return NULL;

}

PyObject *meth = Py_TYPE(callable)->tp_descr_get(

callable, self_arg, (PyObject*)Py_TYPE(self_arg));

if (meth == NULL) {

PyErr_Clear();

return NULL;

}

if (PyCFunction_Check(meth)) {

return (PyObject*)((PyCFunctionObject *)meth);

}

Py_DECREF(meth);

}

return NULL;

}

/*[clinic input]

@critical_section

_lsprof.Profiler._ccall_callback

code: object

instruction_offset: object

callable: object

self_arg: object

[clinic start generated code]*/

static PyObject *

_lsprof_Profiler__ccall_callback_impl(ProfilerObject *self, PyObject *code,

PyObject *instruction_offset,

PyObject *callable, PyObject *self_arg)

/*[clinic end generated code: output=152db83cabd18cad input=2fc1e0630ee5e32b]*/

{

if (self->flags & POF_BUILTINS) {

PyObject* cfunc = get_cfunc_from_callable(callable, self_arg, self->missing);

if (cfunc) {

ptrace_enter_call((PyObject*)self,

((PyCFunctionObject *)cfunc)->m_ml,

cfunc);

Py_DECREF(cfunc);

}

Py_RETURN_NONE;

}

/*[clinic input]

@critical_section

_lsprof.Profiler._creturn_callback

code: object

instruction_offset: object

callable: object

self_arg: object

[clinic start generated code]*/

static PyObject *

_lsprof_Profiler__creturn_callback_impl(ProfilerObject *self, PyObject *code,

PyObject *instruction_offset,

PyObject *callable,

PyObject *self_arg)

/*[clinic end generated code: output=1e886dde8fed8fb0 input=bdc246d6b5b8714a]*/

{

if (self->flags & POF_BUILTINS) {

PyObject* cfunc = get_cfunc_from_callable(callable, self_arg, self->missing);

if (cfunc) {

ptrace_leave_call((PyObject*)self,

((PyCFunctionObject *)cfunc)->m_ml);

Py_DECREF(cfunc);

}

Py_RETURN_NONE;

}

static const struct {

int event;

const char* callback_method;

} callback_table[] = {

{PY_MONITORING_EVENT_PY_START, "_pystart_callback"},

{PY_MONITORING_EVENT_PY_RESUME, "_pystart_callback"},

{PY_MONITORING_EVENT_PY_THROW, "_pythrow_callback"},

{PY_MONITORING_EVENT_PY_RETURN, "_pyreturn_callback"},

{PY_MONITORING_EVENT_PY_YIELD, "_pyreturn_callback"},

{PY_MONITORING_EVENT_PY_UNWIND, "_pyreturn_callback"},

{PY_MONITORING_EVENT_CALL, "_ccall_callback"},

{PY_MONITORING_EVENT_C_RETURN, "_creturn_callback"},

{PY_MONITORING_EVENT_C_RAISE, "_creturn_callback"},

{0, NULL}

};

/*[clinic input]

@critical_section

_lsprof.Profiler.enable

subcalls: bool = True

If True, also records for each function

statistics separated according to its current caller.

builtins: bool = True

If True, records the time spent in

built-in functions separately from their caller.

Start collecting profiling information.

[clinic start generated code]*/

static PyObject *

_lsprof_Profiler_enable_impl(ProfilerObject *self, int subcalls,

int builtins)

/*[clinic end generated code: output=1e747f9dc1edd571 input=0b88115b1c796173]*/

{

int all_events = 0;

if (setSubcalls(self, subcalls) < 0 || setBuiltins(self, builtins) < 0) {

return NULL;

}

PyObject* monitoring = PySys_GetAttrString("monitoring");

if (!monitoring) {

return NULL;

}

PyObject *check = PyObject_CallMethod(monitoring,

"use_tool_id", "is",

self->tool_id, "cProfile");

if (check == NULL) {

goto error;

}

Py_DECREF(check);

for (int i = 0; callback_table[i].callback_method; i++) {

int event = (1 << callback_table[i].event);

PyObject* callback = PyObject_GetAttrString((PyObject*)self, callback_table[i].callback_method);

if (!callback) {

goto error;

}

PyObject *register_result = PyObject_CallMethod(monitoring, "register_callback",

"iiO", self->tool_id,

event, callback);

Py_DECREF(callback);

if (register_result == NULL) {

goto error;

}

Py_DECREF(register_result);

all_events |= event;

}

PyObject *event_result = PyObject_CallMethod(monitoring, "set_events", "ii",

self->tool_id, all_events);

if (event_result == NULL) {

goto error;

}

Py_DECREF(event_result);

Py_DECREF(monitoring);

self->flags |= POF_ENABLED;

Py_RETURN_NONE;

error:

Py_DECREF(monitoring);

return NULL;

}

static void

flush_unmatched(ProfilerObject *pObj)

{

while (pObj->currentProfilerContext) {

ProfilerContext *pContext = pObj->currentProfilerContext;

ProfilerEntry *profEntry= pContext->ctxEntry;

if (profEntry)

Stop(pObj, pContext, profEntry);

else

pObj->currentProfilerContext = pContext->previous;

if (pContext)

PyMem_Free(pContext);

}

/*[clinic input]

@critical_section

_lsprof.Profiler.disable

Stop collecting profiling information.

[clinic start generated code]*/

static PyObject *

_lsprof_Profiler_disable_impl(ProfilerObject *self)

/*[clinic end generated code: output=838cffef7f651870 input=f7e4787cae20f7f6]*/

{

if (self->flags & POF_EXT_TIMER) {

PyErr_SetString(PyExc_RuntimeError,

"cannot disable profiler in external timer");

return NULL;

}

if (self->flags & POF_ENABLED) {

PyObject* result = NULL;

PyObject* monitoring = PySys_GetAttrString("monitoring");

if (!monitoring) {

return NULL;

}

for (int i = 0; callback_table[i].callback_method; i++) {

result = PyObject_CallMethod(monitoring, "register_callback", "iiO", self->tool_id,

(1 << callback_table[i].event), Py_None);

if (!result) {

Py_DECREF(monitoring);

return NULL;

}

Py_DECREF(result);

}

result = PyObject_CallMethod(monitoring, "set_events", "ii", self->tool_id, 0);

if (!result) {

Py_DECREF(monitoring);

return NULL;

}

Py_DECREF(result);

result = PyObject_CallMethod(monitoring, "free_tool_id", "i", self->tool_id);

if (!result) {

Py_DECREF(monitoring);

return NULL;

}

Py_DECREF(result);

Py_DECREF(monitoring);

self->flags &= ~POF_ENABLED;

flush_unmatched(self);

}

if (pending_exception(self)) {

return NULL;

}

Py_RETURN_NONE;

}

/*[clinic input]

@critical_section

_lsprof.Profiler.clear

Clear all profiling information collected so far.

[clinic start generated code]*/

static PyObject *

_lsprof_Profiler_clear_impl(ProfilerObject *self)

/*[clinic end generated code: output=dd1c668fb84b1335 input=4aab219d5d7a9bec]*/

{

if (self->flags & POF_EXT_TIMER) {

PyErr_SetString(PyExc_RuntimeError,

"cannot clear profiler in external timer");

return NULL;

}

clearEntries(self);

Py_RETURN_NONE;

}

static int

profiler_traverse(PyObject *op, visitproc visit, void *arg)

{

ProfilerObject *self = ProfilerObject_CAST(op);

Py_VISIT(Py_TYPE(op));

Py_VISIT(self->externalTimer);

Py_VISIT(self->missing);

return 0;

}

static void

profiler_dealloc(PyObject *op)

{

ProfilerObject *self = ProfilerObject_CAST(op);

PyObject_GC_UnTrack(self);

if (self->flags & POF_ENABLED) {

PyThreadState *tstate = _PyThreadState_GET();

if (_PyEval_SetProfile(tstate, NULL, NULL) < 0) {

PyErr_FormatUnraisable("Exception ignored while "

"destroying _lsprof profiler");

}

/* Drop the external timer before flushing: it is Python code, and the

profiler can be deallocated by the garbage collector. */

Py_CLEAR(self->externalTimer);

flush_unmatched(self);

clearEntries(self);

Py_XDECREF(self->missing);

PyTypeObject *tp = Py_TYPE(self);

View remainder of file in raw view

cpython/Modules/_lsprof.c at 3.15 · python/cpython · GitHub

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