cpython/Modules/_lsprof.c

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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 "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 POF_ENABLED 0x001
#define POF_SUBCALLS 0x002
#define POF_BUILTINS 0x004
#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 = _PyObject_CallNoArgs(pObj->externalTimer);
if (o == NULL) {
PyErr_WriteUnraisable(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 = _PyTime_FromNanosecondsObject(&result, o);
}
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_WriteUnraisable(pObj->externalTimer);
return 0;
}
return result;
}
static inline _PyTime_t
call_timer(ProfilerObject *pObj)
{
if (pObj->externalTimer != NULL) {
return CallExternalTimer(pObj);
}
else {
return _PyTime_GetPerfCounter();
}
}
/*** 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_Lookup(Py_TYPE(self), name);
Py_XINCREF(mo);
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 */
if (pObj->currentProfilerContext) {
PyMem_Free(pObj->currentProfilerContext);
pObj->currentProfilerContext = NULL;
}
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;
/* 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);
Merged revisions 57778-58052 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r57820 | georg.brandl | 2007-08-31 08:59:27 +0200 (Fri, 31 Aug 2007) | 2 lines Document new shorthand notation for index entries. ........ r57827 | georg.brandl | 2007-08-31 10:47:51 +0200 (Fri, 31 Aug 2007) | 2 lines Fix subitem markup. ........ r57833 | martin.v.loewis | 2007-08-31 12:01:07 +0200 (Fri, 31 Aug 2007) | 1 line Mark registry components as 64-bit on Win64. ........ r57854 | bill.janssen | 2007-08-31 21:02:23 +0200 (Fri, 31 Aug 2007) | 1 line deprecate use of FakeSocket ........ r57855 | bill.janssen | 2007-08-31 21:02:46 +0200 (Fri, 31 Aug 2007) | 1 line remove mentions of socket.ssl in comments ........ r57856 | bill.janssen | 2007-08-31 21:03:31 +0200 (Fri, 31 Aug 2007) | 1 line remove use of non-existent SSLFakeSocket in apparently untested code ........ r57859 | martin.v.loewis | 2007-09-01 08:36:03 +0200 (Sat, 01 Sep 2007) | 3 lines Bug #1737210: Change Manufacturer of Windows installer to PSF. Will backport to 2.5. ........ r57865 | georg.brandl | 2007-09-01 09:51:24 +0200 (Sat, 01 Sep 2007) | 2 lines Fix RST link (backport from Py3k). ........ r57876 | georg.brandl | 2007-09-01 17:49:49 +0200 (Sat, 01 Sep 2007) | 2 lines Document sets' ">" and "<" operations (backport from py3k). ........ r57878 | skip.montanaro | 2007-09-01 19:40:03 +0200 (Sat, 01 Sep 2007) | 4 lines Added a note and examples to explain that re.split does not split on an empty pattern match. (issue 852532). ........ r57879 | walter.doerwald | 2007-09-01 20:18:09 +0200 (Sat, 01 Sep 2007) | 2 lines Fix wrong function names. ........ r57880 | walter.doerwald | 2007-09-01 20:34:05 +0200 (Sat, 01 Sep 2007) | 2 lines Fix typo. ........ r57889 | andrew.kuchling | 2007-09-01 22:31:59 +0200 (Sat, 01 Sep 2007) | 1 line Markup fix ........ r57892 | andrew.kuchling | 2007-09-01 22:43:36 +0200 (Sat, 01 Sep 2007) | 1 line Add various items ........ r57895 | andrew.kuchling | 2007-09-01 23:17:58 +0200 (Sat, 01 Sep 2007) | 1 line Wording change ........ r57896 | andrew.kuchling | 2007-09-01 23:18:31 +0200 (Sat, 01 Sep 2007) | 1 line Add more items ........ r57904 | ronald.oussoren | 2007-09-02 11:46:07 +0200 (Sun, 02 Sep 2007) | 3 lines Macosx: this patch ensures that the value of MACOSX_DEPLOYMENT_TARGET used by the Makefile is also used at configure-time. ........ r57925 | georg.brandl | 2007-09-03 09:16:46 +0200 (Mon, 03 Sep 2007) | 2 lines Fix #883466: don't allow Unicode as arguments to quopri and uu codecs. ........ r57936 | matthias.klose | 2007-09-04 01:33:04 +0200 (Tue, 04 Sep 2007) | 2 lines - Added support for linking the bsddb module against BerkeleyDB 4.6.x. ........ r57954 | mark.summerfield | 2007-09-04 10:16:15 +0200 (Tue, 04 Sep 2007) | 3 lines Added cross-references plus a note about dict & list shallow copying. ........ r57958 | martin.v.loewis | 2007-09-04 11:51:57 +0200 (Tue, 04 Sep 2007) | 3 lines Document that we rely on the OS to release the crypto context. Fixes #1626801. ........ r57960 | martin.v.loewis | 2007-09-04 15:13:14 +0200 (Tue, 04 Sep 2007) | 3 lines Patch #1388440: Add set_completion_display_matches_hook and get_completion_type to readline. ........ r57961 | martin.v.loewis | 2007-09-04 16:19:28 +0200 (Tue, 04 Sep 2007) | 3 lines Patch #1031213: Decode source line in SyntaxErrors back to its original source encoding. Will backport to 2.5. ........ r57972 | matthias.klose | 2007-09-04 20:17:36 +0200 (Tue, 04 Sep 2007) | 3 lines - Makefile.pre.in(buildbottest): Run an optional script pybuildbot.identify to include some information about the build environment. ........ r57973 | matthias.klose | 2007-09-04 21:05:38 +0200 (Tue, 04 Sep 2007) | 2 lines - Makefile.pre.in(buildbottest): Remove whitespace at eol. ........ r57975 | matthias.klose | 2007-09-04 22:46:02 +0200 (Tue, 04 Sep 2007) | 2 lines - Fix libffi configure for hppa*-*-linux* | parisc*-*-linux*. ........ r57980 | bill.janssen | 2007-09-05 02:46:27 +0200 (Wed, 05 Sep 2007) | 1 line SSL certificate distinguished names should be represented by tuples ........ r57985 | martin.v.loewis | 2007-09-05 08:39:17 +0200 (Wed, 05 Sep 2007) | 3 lines Patch #1105: Explain that one needs to build the solution to get dependencies right. ........ r57987 | armin.rigo | 2007-09-05 09:51:21 +0200 (Wed, 05 Sep 2007) | 4 lines PyDict_GetItem() returns a borrowed reference. There are probably a number of places that are open to attacks such as the following one, in bltinmodule.c:min_max(). ........ r57991 | martin.v.loewis | 2007-09-05 13:47:34 +0200 (Wed, 05 Sep 2007) | 3 lines Patch #786737: Allow building in a tree of symlinks pointing to a readonly source. ........ r57993 | georg.brandl | 2007-09-05 15:36:44 +0200 (Wed, 05 Sep 2007) | 2 lines Backport from Py3k: Bug #1684991: explain lookup semantics for __special__ methods (new-style classes only). ........ r58004 | armin.rigo | 2007-09-06 10:30:51 +0200 (Thu, 06 Sep 2007) | 4 lines Patch #1733973 by peaker: ptrace_enter_call() assumes no exception is currently set. This assumption is broken when throwing into a generator. ........ r58006 | armin.rigo | 2007-09-06 11:30:38 +0200 (Thu, 06 Sep 2007) | 4 lines PyDict_GetItem() returns a borrowed reference. This attack is against ceval.c:IMPORT_NAME, which calls an object (__builtin__.__import__) without holding a reference to it. ........ r58013 | georg.brandl | 2007-09-06 16:49:56 +0200 (Thu, 06 Sep 2007) | 2 lines Backport from 3k: #1116: fix reference to old filename. ........ r58021 | thomas.heller | 2007-09-06 22:26:20 +0200 (Thu, 06 Sep 2007) | 1 line Fix typo: c_float represents to C float type. ........ r58022 | skip.montanaro | 2007-09-07 00:29:06 +0200 (Fri, 07 Sep 2007) | 3 lines If this is correct for py3k branch and it's already in the release25-maint branch, seems like it ought to be on the trunk as well. ........ r58023 | gregory.p.smith | 2007-09-07 00:59:59 +0200 (Fri, 07 Sep 2007) | 4 lines Apply the fix from Issue1112 to make this test more robust and keep windows happy. ........ r58031 | brett.cannon | 2007-09-07 05:17:50 +0200 (Fri, 07 Sep 2007) | 4 lines Make uuid1 and uuid4 tests conditional on whether ctypes can be imported; implementation of either function depends on ctypes but uuid as a whole does not. ........ r58032 | brett.cannon | 2007-09-07 06:18:30 +0200 (Fri, 07 Sep 2007) | 6 lines Fix a crasher where Python code managed to infinitely recurse in C code without ever going back out to Python code in PyObject_Call(). Required introducing a static RuntimeError instance so that normalizing an exception there is no reliance on a recursive call that would put the exception system over the recursion check itself. ........ r58034 | thomas.heller | 2007-09-07 08:32:17 +0200 (Fri, 07 Sep 2007) | 1 line Add a 'c_longdouble' type to the ctypes module. ........ r58035 | thomas.heller | 2007-09-07 11:30:40 +0200 (Fri, 07 Sep 2007) | 1 line Remove unneeded #include. ........ r58036 | thomas.heller | 2007-09-07 11:33:24 +0200 (Fri, 07 Sep 2007) | 6 lines Backport from py3k branch: Add a workaround for a strange bug on win64, when _ctypes is compiled with the SDK compiler. This should fix the failing Lib\ctypes\test\test_as_parameter.py test. ........ r58037 | georg.brandl | 2007-09-07 16:14:40 +0200 (Fri, 07 Sep 2007) | 2 lines Fix a wrong indentation for sublists. ........ r58043 | georg.brandl | 2007-09-07 22:10:49 +0200 (Fri, 07 Sep 2007) | 2 lines #1095: ln -f doesn't work portably, fix in Makefile. ........ r58049 | skip.montanaro | 2007-09-08 02:34:17 +0200 (Sat, 08 Sep 2007) | 1 line be explicit about the actual location of the missing file ........
2007-09-08 14:39:28 -03:00
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;
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]
_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=445e193ef4522902]*/
{
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;
}
PyObject* pystart_callback(ProfilerObject* self, PyObject *const *args, Py_ssize_t size)
{
PyObject* code = args[0];
ptrace_enter_call((PyObject*)self, (void *)code, (PyObject *)code);
Py_RETURN_NONE;
}
PyObject* pyreturn_callback(ProfilerObject* self, PyObject *const *args, Py_ssize_t size)
{
PyObject* code = args[0];
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) {
return NULL;
}
if (PyCFunction_Check(meth)) {
return (PyObject*)((PyCFunctionObject *)meth);
}
}
return NULL;
}
PyObject* ccall_callback(ProfilerObject* self, PyObject *const *args, Py_ssize_t size)
{
if (self->flags & POF_BUILTINS) {
PyObject* callable = args[2];
PyObject* self_arg = args[3];
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;
}
PyObject* creturn_callback(ProfilerObject* self, PyObject *const *args, Py_ssize_t size)
{
if (self->flags & POF_BUILTINS) {
PyObject* callable = args[2];
PyObject* self_arg = args[3];
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, "_pystart_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}
};
PyDoc_STRVAR(enable_doc, "\
enable(subcalls=True, builtins=True)\n\
\n\
Start collecting profiling information.\n\
If 'subcalls' is True, also records for each function\n\
statistics separated according to its current caller.\n\
If 'builtins' is True, records the time spent in\n\
built-in functions separately from their caller.\n\
");
static PyObject*
profiler_enable(ProfilerObject *self, PyObject *args, PyObject *kwds)
{
int subcalls = -1;
int builtins = -1;
static char *kwlist[] = {"subcalls", "builtins", 0};
int all_events = 0;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "|pp:enable",
kwlist, &subcalls, &builtins))
return NULL;
if (setSubcalls(self, subcalls) < 0 || setBuiltins(self, builtins) < 0) {
return NULL;
}
PyObject* monitoring = _PyImport_GetModuleAttrString("sys", "monitoring");
if (!monitoring) {
return NULL;
}
if (PyObject_CallMethod(monitoring, "use_tool_id", "is", self->tool_id, "cProfile") == NULL) {
PyErr_Format(PyExc_ValueError, "Another profiling tool is already active");
Py_DECREF(monitoring);
return NULL;
}
for (int i = 0; callback_table[i].callback_method; i++) {
PyObject* callback = PyObject_GetAttrString((PyObject*)self, callback_table[i].callback_method);
if (!callback) {
Py_DECREF(monitoring);
return NULL;
}
Py_XDECREF(PyObject_CallMethod(monitoring, "register_callback", "iiO", self->tool_id,
(1 << callback_table[i].event),
callback));
Py_DECREF(callback);
all_events |= (1 << callback_table[i].event);
}
if (!PyObject_CallMethod(monitoring, "set_events", "ii", self->tool_id, all_events)) {
Py_DECREF(monitoring);
return NULL;
}
Py_DECREF(monitoring);
self->flags |= POF_ENABLED;
Py_RETURN_NONE;
}
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);
}
}
PyDoc_STRVAR(disable_doc, "\
disable()\n\
\n\
Stop collecting profiling information.\n\
");
static PyObject*
profiler_disable(ProfilerObject *self, PyObject* noarg)
{
if (self->flags & POF_ENABLED) {
PyObject* result = NULL;
PyObject* monitoring = _PyImport_GetModuleAttrString("sys", "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;
}
PyDoc_STRVAR(clear_doc, "\
clear()\n\
\n\
Clear all profiling information collected so far.\n\
");
static PyObject*
profiler_clear(ProfilerObject *pObj, PyObject* noarg)
{
clearEntries(pObj);
Py_RETURN_NONE;
}
static int
profiler_traverse(ProfilerObject *op, visitproc visit, void *arg)
{
Py_VISIT(Py_TYPE(op));
return 0;
}
static void
profiler_dealloc(ProfilerObject *op)
{
PyObject_GC_UnTrack(op);
if (op->flags & POF_ENABLED) {
PyThreadState *tstate = _PyThreadState_GET();
if (_PyEval_SetProfile(tstate, NULL, NULL) < 0) {
_PyErr_WriteUnraisableMsg("When destroying _lsprof profiler", NULL);
}
}
flush_unmatched(op);
clearEntries(op);
Py_XDECREF(op->externalTimer);
PyTypeObject *tp = Py_TYPE(op);
tp->tp_free(op);
Py_DECREF(tp);
}
static int
profiler_init(ProfilerObject *pObj, PyObject *args, PyObject *kw)
{
PyObject *timer = NULL;
double timeunit = 0.0;
int subcalls = 1;
int builtins = 1;
static char *kwlist[] = {"timer", "timeunit",
"subcalls", "builtins", 0};
if (!PyArg_ParseTupleAndKeywords(args, kw, "|Odpp:Profiler", kwlist,
&timer, &timeunit,
&subcalls, &builtins))
return -1;
if (setSubcalls(pObj, subcalls) < 0 || setBuiltins(pObj, builtins) < 0)
return -1;
pObj->externalTimerUnit = timeunit;
Py_XSETREF(pObj->externalTimer, Py_XNewRef(timer));
pObj->tool_id = PY_MONITORING_PROFILER_ID;
PyObject* monitoring = _PyImport_GetModuleAttrString("sys", "monitoring");
if (!monitoring) {
return -1;
}
pObj->missing = PyObject_GetAttrString(monitoring, "MISSING");
if (!pObj->missing) {
Py_DECREF(monitoring);
return -1;
}
Py_DECREF(monitoring);
return 0;
}
static PyMethodDef profiler_methods[] = {
_LSPROF_PROFILER_GETSTATS_METHODDEF
{"enable", _PyCFunction_CAST(profiler_enable),
METH_VARARGS | METH_KEYWORDS, enable_doc},
{"disable", (PyCFunction)profiler_disable,
METH_NOARGS, disable_doc},
{"clear", (PyCFunction)profiler_clear,
METH_NOARGS, clear_doc},
{"_pystart_callback", _PyCFunction_CAST(pystart_callback),
METH_FASTCALL, NULL},
{"_pyreturn_callback", _PyCFunction_CAST(pyreturn_callback),
METH_FASTCALL, NULL},
{"_ccall_callback", _PyCFunction_CAST(ccall_callback),
METH_FASTCALL, NULL},
{"_creturn_callback", _PyCFunction_CAST(creturn_callback),
METH_FASTCALL, NULL},
{NULL, NULL}
};
PyDoc_STRVAR(profiler_doc, "\
Profiler(timer=None, timeunit=None, subcalls=True, builtins=True)\n\
\n\
Builds a profiler object using the specified timer function.\n\
The default timer is a fast built-in one based on real time.\n\
For custom timer functions returning integers, timeunit can\n\
be a float specifying a scale (i.e. how long each integer unit\n\
is, in seconds).\n\
");
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_traverse, profiler_traverse},
{0, 0}
};
static PyType_Spec _lsprof_profiler_type_spec = {
.name = "_lsprof.Profiler",
.basicsize = sizeof(ProfilerObject),
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
Py_TPFLAGS_HAVE_GC | Py_TPFLAGS_IMMUTABLETYPE),
.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;
}
if (PyModule_AddType(module, state->stats_entry_type) < 0) {
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_subentry_type) < 0) {
return -1;
}
return 0;
}
static PyModuleDef_Slot _lsprofslots[] = {
{Py_mod_exec, _lsprof_exec},
// XXX gh-103092: fix isolation.
{Py_mod_multiple_interpreters, Py_MOD_MULTIPLE_INTERPRETERS_NOT_SUPPORTED},
//{Py_mod_multiple_interpreters, Py_MOD_PER_INTERPRETER_GIL_SUPPORTED},
{0, NULL}
};
static struct PyModuleDef _lsprofmodule = {
PyModuleDef_HEAD_INIT,
.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)
{
return PyModuleDef_Init(&_lsprofmodule);
}