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GH-103082: Implementation of PEP 669: Low Impact Monitoring for CPython (GH-103083)

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* The majority of the monitoring code is in instrumentation.c

* The new instrumentation bytecodes are in bytecodes.c

* legacy_tracing.c adapts the new API to the old sys.setrace and sys.setprofile APIs
This commit is contained in:
Mark Shannon 2023-04-12 12:04:55 +01:00 • committed by GitHub
parent dce2d38cb0
commit 411b169281
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GPG key ID: 4AEE18F83AFDEB23
44 changed files with 6029 additions and 1625 deletions
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639
Python/ceval.c
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@ -10,6 +10,7 @@
#include "pycore_function.h"
#include "pycore_intrinsics.h"
#include "pycore_long.h" // _PyLong_GetZero()
#include "pycore_instruments.h"
#include "pycore_object.h" // _PyObject_GC_TRACK()
#include "pycore_moduleobject.h" // PyModuleObject
#include "pycore_opcode.h" // EXTRA_CASES
@ -92,13 +93,6 @@
#define _Py_atomic_load_relaxed_int32(ATOMIC_VAL) _Py_atomic_load_relaxed(ATOMIC_VAL)
#endif
/* Forward declarations */
static PyObject *trace_call_function(
PyThreadState *tstate, PyObject *callable, PyObject **stack,
Py_ssize_t oparg, PyObject *kwnames);
static PyObject * do_call_core(
PyThreadState *tstate, PyObject *func,
PyObject *callargs, PyObject *kwdict, int use_tracing);
#ifdef LLTRACE
static void
@ -179,19 +173,22 @@ lltrace_resume_frame(_PyInterpreterFrame *frame)
PyErr_SetRaisedException(exc);
}
#endif
static int call_trace(Py_tracefunc, PyObject *,
PyThreadState *, _PyInterpreterFrame *,
int, PyObject *);
static int call_trace_protected(Py_tracefunc, PyObject *,
PyThreadState *, _PyInterpreterFrame *,
int, PyObject *);
static void call_exc_trace(Py_tracefunc, PyObject *,
PyThreadState *, _PyInterpreterFrame *);
static int maybe_call_line_trace(Py_tracefunc, PyObject *,
PyThreadState *, _PyInterpreterFrame *, int);
static void maybe_dtrace_line(_PyInterpreterFrame *, PyTraceInfo *, int);
static void dtrace_function_entry(_PyInterpreterFrame *);
static void dtrace_function_return(_PyInterpreterFrame *);
static void monitor_raise(PyThreadState *tstate,
_PyInterpreterFrame *frame,
_Py_CODEUNIT *instr);
static int monitor_stop_iteration(PyThreadState *tstate,
_PyInterpreterFrame *frame,
_Py_CODEUNIT *instr);
static void monitor_unwind(PyThreadState *tstate,
_PyInterpreterFrame *frame,
_Py_CODEUNIT *instr);
static void monitor_handled(PyThreadState *tstate,
_PyInterpreterFrame *frame,
_Py_CODEUNIT *instr, PyObject *exc);
static void monitor_throw(PyThreadState *tstate,
_PyInterpreterFrame *frame,
_Py_CODEUNIT *instr);
static PyObject * import_name(PyThreadState *, _PyInterpreterFrame *,
PyObject *, PyObject *, PyObject *);
@ -217,21 +214,6 @@ _PyEvalFrameClearAndPop(PyThreadState *tstate, _PyInterpreterFrame *frame);
"cannot access free variable '%s' where it is not associated with a" \
" value in enclosing scope"
#ifndef NDEBUG
/* Ensure that tstate is valid: sanity check for PyEval_AcquireThread() and
PyEval_RestoreThread(). Detect if tstate memory was freed. It can happen
when a thread continues to run after Python finalization, especially
daemon threads. */
static int
is_tstate_valid(PyThreadState *tstate)
{
assert(!_PyMem_IsPtrFreed(tstate));
assert(!_PyMem_IsPtrFreed(tstate->interp));
return 1;
}
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
@ -596,63 +578,6 @@ PyEval_EvalFrameEx(PyFrameObject *f, int throwflag)
#include "ceval_macros.h"
static int
trace_function_entry(PyThreadState *tstate, _PyInterpreterFrame *frame)
{
if (tstate->c_tracefunc != NULL) {
/* tstate->c_tracefunc, if defined, is a
function that will be called on *every* entry
to a code block. Its return value, if not
None, is a function that will be called at
the start of each executed line of code.
(Actually, the function must return itself
in order to continue tracing.) The trace
functions are called with three arguments:
a pointer to the current frame, a string
indicating why the function is called, and
an argument which depends on the situation.
The global trace function is also called
whenever an exception is detected. */
if (call_trace_protected(tstate->c_tracefunc,
tstate->c_traceobj,
tstate, frame,
PyTrace_CALL, Py_None)) {
/* Trace function raised an error */
return -1;
}
}
if (tstate->c_profilefunc != NULL) {
/* Similar for c_profilefunc, except it needn't
return itself and isn't called for "line" events */
if (call_trace_protected(tstate->c_profilefunc,
tstate->c_profileobj,
tstate, frame,
PyTrace_CALL, Py_None)) {
/* Profile function raised an error */
return -1;
}
}
return 0;
}
static int
trace_function_exit(PyThreadState *tstate, _PyInterpreterFrame *frame, PyObject *retval)
{
if (tstate->c_tracefunc) {
if (call_trace_protected(tstate->c_tracefunc, tstate->c_traceobj,
tstate, frame, PyTrace_RETURN, retval)) {
return -1;
}
}
if (tstate->c_profilefunc) {
if (call_trace_protected(tstate->c_profilefunc, tstate->c_profileobj,
tstate, frame, PyTrace_RETURN, retval)) {
return -1;
}
}
return 0;
}
int _Py_CheckRecursiveCallPy(
PyThreadState *tstate)
@ -730,7 +655,6 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int
* strict stack discipline must be maintained.
*/
_PyCFrame *prev_cframe = tstate->cframe;
cframe.use_tracing = prev_cframe->use_tracing;
cframe.previous = prev_cframe;
tstate->cframe = &cframe;
@ -765,8 +689,11 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int
if (_Py_EnterRecursivePy(tstate)) {
goto exit_unwind;
}
TRACE_FUNCTION_THROW_ENTRY();
DTRACE_FUNCTION_ENTRY();
/* Because this avoids the RESUME,
* we need to update instrumentation */
_Py_Instrument(frame->f_code, tstate->interp);
monitor_throw(tstate, frame, frame->prev_instr);
/* TO DO -- Monitor throw entry. */
goto resume_with_error;
}
@ -781,15 +708,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int
assert(_PyInterpreterFrame_LASTI(frame) >= -1); \
/* Jump back to the last instruction executed... */ \
next_instr = frame->prev_instr + 1; \
stack_pointer = _PyFrame_GetStackPointer(frame); \
/* Set stackdepth to -1. \
Update when returning or calling trace function. \
Having stackdepth <= 0 ensures that invalid \
values are not visible to the cycle GC. \
We choose -1 rather than 0 to assist debugging. \
*/ \
frame->stacktop = -1;
stack_pointer = _PyFrame_GetStackPointer(frame);
start_frame:
if (_Py_EnterRecursivePy(tstate)) {
@ -845,91 +764,6 @@ handle_eval_breaker:
#include "generated_cases.c.h"
#if USE_COMPUTED_GOTOS
TARGET_DO_TRACING:
#else
case DO_TRACING:
#endif
{
assert(cframe.use_tracing);
assert(tstate->tracing == 0);
if (INSTR_OFFSET() >= frame->f_code->_co_firsttraceable) {
int instr_prev = _PyInterpreterFrame_LASTI(frame);
frame->prev_instr = next_instr;
NEXTOPARG();
// No _PyOpcode_Deopt here, since RESUME has no optimized forms:
if (opcode == RESUME) {
if (oparg < 2) {
CHECK_EVAL_BREAKER();
}
/* Call tracing */
TRACE_FUNCTION_ENTRY();
DTRACE_FUNCTION_ENTRY();
}
else {
/* line-by-line tracing support */
if (PyDTrace_LINE_ENABLED()) {
maybe_dtrace_line(frame, &tstate->trace_info, instr_prev);
}
if (cframe.use_tracing &&
tstate->c_tracefunc != NULL && !tstate->tracing) {
int err;
/* see maybe_call_line_trace()
for expository comments */
_PyFrame_SetStackPointer(frame, stack_pointer);
err = maybe_call_line_trace(tstate->c_tracefunc,
tstate->c_traceobj,
tstate, frame, instr_prev);
// Reload possibly changed frame fields:
stack_pointer = _PyFrame_GetStackPointer(frame);
frame->stacktop = -1;
// next_instr is only reloaded if tracing *does not* raise.
// This is consistent with the behavior of older Python
// versions. If a trace function sets a new f_lineno and
// *then* raises, we use the *old* location when searching
// for an exception handler, displaying the traceback, and
// so on:
if (err) {
// next_instr wasn't incremented at the start of this
// instruction. Increment it before handling the error,
// so that it looks the same as a "normal" instruction:
next_instr++;
goto error;
}
// Reload next_instr. Don't increment it, though, since
// we're going to re-dispatch to the "true" instruction now:
next_instr = frame->prev_instr;
}
}
}
NEXTOPARG();
PRE_DISPATCH_GOTO();
// No _PyOpcode_Deopt here, since EXTENDED_ARG has no optimized forms:
while (opcode == EXTENDED_ARG) {
// CPython hasn't ever traced the instruction after an EXTENDED_ARG.
// Inline the EXTENDED_ARG here, so we can avoid branching there:
INSTRUCTION_START(EXTENDED_ARG);
opcode = next_instr->op.code;
oparg = oparg << 8 | next_instr->op.arg;
// Make sure the next instruction isn't a RESUME, since that needs
// to trace properly (and shouldn't have an EXTENDED_ARG, anyways):
assert(opcode != RESUME);
PRE_DISPATCH_GOTO();
}
opcode = _PyOpcode_Deopt[opcode];
if (_PyOpcode_Caches[opcode]) {
uint16_t *counter = &next_instr[1].cache;
// The instruction is going to decrement the counter, so we need to
// increment it here to make sure it doesn't try to specialize:
if (!ADAPTIVE_COUNTER_IS_MAX(*counter)) {
INCREMENT_ADAPTIVE_COUNTER(*counter);
}
}
DISPATCH_GOTO();
}
#if USE_COMPUTED_GOTOS
_unknown_opcode:
#else
@ -988,12 +822,7 @@ error:
PyTraceBack_Here(f);
}
}
if (tstate->c_tracefunc != NULL) {
/* Make sure state is set to FRAME_UNWINDING for tracing */
call_exc_trace(tstate->c_tracefunc, tstate->c_traceobj,
tstate, frame);
}
monitor_raise(tstate, frame, next_instr-1);
exception_unwind:
{
@ -1012,8 +841,7 @@ exception_unwind:
}
assert(STACK_LEVEL() == 0);
_PyFrame_SetStackPointer(frame, stack_pointer);
TRACE_FUNCTION_UNWIND();
DTRACE_FUNCTION_EXIT();
monitor_unwind(tstate, frame, next_instr-1);
goto exit_unwind;
}
@ -1036,8 +864,10 @@ exception_unwind:
available to the handler,
so a program can emulate the
Python main loop. */
PUSH(_PyErr_GetRaisedException(tstate));
PyObject *exc = _PyErr_GetRaisedException(tstate);
PUSH(exc);
JUMPTO(handler);
monitor_handled(tstate, frame, next_instr, exc);
/* Resume normal execution */
DISPATCH();
}
@ -1054,7 +884,6 @@ exit_unwind:
if (frame == &entry_frame) {
/* Restore previous cframe and exit */
tstate->cframe = cframe.previous;
tstate->cframe->use_tracing = cframe.use_tracing;
assert(tstate->cframe->current_frame == frame->previous);
_Py_LeaveRecursiveCallTstate(tstate);
return NULL;
@ -2020,105 +1849,108 @@ Error:
return 0;
}
static void
call_exc_trace(Py_tracefunc func, PyObject *self,
PyThreadState *tstate,
_PyInterpreterFrame *f)
static int
do_monitor_exc(PyThreadState *tstate, _PyInterpreterFrame *frame,
_Py_CODEUNIT *instr, int event)
{
PyObject *exc = _PyErr_GetRaisedException(tstate);
assert(exc && PyExceptionInstance_Check(exc));
PyObject *type = PyExceptionInstance_Class(exc);
PyObject *traceback = PyException_GetTraceback(exc);
if (traceback == NULL) {
traceback = Py_NewRef(Py_None);
}
PyObject *arg = PyTuple_Pack(3, type, exc, traceback);
Py_XDECREF(traceback);
if (arg == NULL) {
_PyErr_SetRaisedException(tstate, exc);
return;
}
int err = call_trace(func, self, tstate, f, PyTrace_EXCEPTION, arg);
Py_DECREF(arg);
assert(event < PY_MONITORING_UNGROUPED_EVENTS);
PyObject *exc = PyErr_GetRaisedException();
assert(exc != NULL);
int err = _Py_call_instrumentation_arg(tstate, event, frame, instr, exc);
if (err == 0) {
_PyErr_SetRaisedException(tstate, exc);
PyErr_SetRaisedException(exc);
}
else {
Py_XDECREF(exc);
Py_DECREF(exc);
}
return err;
}
static inline int
no_tools_for_event(PyThreadState *tstate, _PyInterpreterFrame *frame, int event)
{
_PyCoMonitoringData *data = frame->f_code->_co_monitoring;
if (data) {
if (data->active_monitors.tools[event] == 0) {
return 1;
}
}
else {
if (tstate->interp->monitors.tools[event] == 0) {
return 1;
}
}
return 0;
}
static void
monitor_raise(PyThreadState *tstate, _PyInterpreterFrame *frame,
_Py_CODEUNIT *instr)
{
if (no_tools_for_event(tstate, frame, PY_MONITORING_EVENT_RAISE)) {
return;
}
do_monitor_exc(tstate, frame, instr, PY_MONITORING_EVENT_RAISE);
}
static int
call_trace_protected(Py_tracefunc func, PyObject *obj,
PyThreadState *tstate, _PyInterpreterFrame *frame,
int what, PyObject *arg)
monitor_stop_iteration(PyThreadState *tstate, _PyInterpreterFrame *frame,
_Py_CODEUNIT *instr)
{
PyObject *exc = _PyErr_GetRaisedException(tstate);
int err = call_trace(func, obj, tstate, frame, what, arg);
if (err == 0)
{
_PyErr_SetRaisedException(tstate, exc);
if (no_tools_for_event(tstate, frame, PY_MONITORING_EVENT_STOP_ITERATION)) {
return 0;
}
else {
Py_XDECREF(exc);
return -1;
}
return do_monitor_exc(tstate, frame, instr, PY_MONITORING_EVENT_STOP_ITERATION);
}
static void
initialize_trace_info(PyTraceInfo *trace_info, _PyInterpreterFrame *frame)
monitor_unwind(PyThreadState *tstate,
_PyInterpreterFrame *frame,
_Py_CODEUNIT *instr)
{
PyCodeObject *code = frame->f_code;
if (trace_info->code != code) {
trace_info->code = code;
_PyCode_InitAddressRange(code, &trace_info->bounds);
if (no_tools_for_event(tstate, frame, PY_MONITORING_EVENT_PY_UNWIND)) {
return;
}
_Py_call_instrumentation_exc0(tstate, PY_MONITORING_EVENT_PY_UNWIND, frame, instr);
}
static void
monitor_handled(PyThreadState *tstate,
_PyInterpreterFrame *frame,
_Py_CODEUNIT *instr, PyObject *exc)
{
if (no_tools_for_event(tstate, frame, PY_MONITORING_EVENT_EXCEPTION_HANDLED)) {
return;
}
_Py_call_instrumentation_arg(tstate, PY_MONITORING_EVENT_EXCEPTION_HANDLED, frame, instr, exc);
}
static void
monitor_throw(PyThreadState *tstate,
_PyInterpreterFrame *frame,
_Py_CODEUNIT *instr)
{
if (no_tools_for_event(tstate, frame, PY_MONITORING_EVENT_PY_THROW)) {
return;
}
_Py_call_instrumentation_exc0(tstate, PY_MONITORING_EVENT_PY_THROW, frame, instr);
}
void
PyThreadState_EnterTracing(PyThreadState *tstate)
{
assert(tstate->tracing >= 0);
tstate->tracing++;
tstate->cframe->use_tracing = 0;
}
void
PyThreadState_LeaveTracing(PyThreadState *tstate)
{
assert(tstate->tracing > 0 && tstate->cframe->use_tracing == 0);
assert(tstate->tracing > 0);
tstate->tracing--;
_PyThreadState_UpdateTracingState(tstate);
}
static int
call_trace(Py_tracefunc func, PyObject *obj,
PyThreadState *tstate, _PyInterpreterFrame *frame,
int what, PyObject *arg)
{
int result;
if (tstate->tracing) {
return 0;
}
PyFrameObject *f = _PyFrame_GetFrameObject(frame);
if (f == NULL) {
return -1;
}
int old_what = tstate->tracing_what;
tstate->tracing_what = what;
PyThreadState_EnterTracing(tstate);
assert(_PyInterpreterFrame_LASTI(frame) >= 0);
if (_PyCode_InitLineArray(frame->f_code)) {
return -1;
}
f->f_lineno = _PyCode_LineNumberFromArray(frame->f_code, _PyInterpreterFrame_LASTI(frame));
result = func(obj, f, what, arg);
f->f_lineno = 0;
PyThreadState_LeaveTracing(tstate);
tstate->tracing_what = old_what;
return result;
}
PyObject*
_PyEval_CallTracing(PyObject *func, PyObject *args)
@ -2126,7 +1958,6 @@ _PyEval_CallTracing(PyObject *func, PyObject *args)
// Save and disable tracing
PyThreadState *tstate = _PyThreadState_GET();
int save_tracing = tstate->tracing;
int save_use_tracing = tstate->cframe->use_tracing;
tstate->tracing = 0;
// Call the tracing function
@ -2134,81 +1965,9 @@ _PyEval_CallTracing(PyObject *func, PyObject *args)
// Restore tracing
tstate->tracing = save_tracing;
tstate->cframe->use_tracing = save_use_tracing;
return result;
}
/* See Objects/lnotab_notes.txt for a description of how tracing works. */
static int
maybe_call_line_trace(Py_tracefunc func, PyObject *obj,
PyThreadState *tstate, _PyInterpreterFrame *frame, int instr_prev)
{
int result = 0;
/* If the last instruction falls at the start of a line or if it
represents a jump backwards, update the frame's line number and
then call the trace function if we're tracing source lines.
*/
if (_PyCode_InitLineArray(frame->f_code)) {
return -1;
}
int lastline;
if (instr_prev <= frame->f_code->_co_firsttraceable) {
lastline = -1;
}
else {
lastline = _PyCode_LineNumberFromArray(frame->f_code, instr_prev);
}
int line = _PyCode_LineNumberFromArray(frame->f_code, _PyInterpreterFrame_LASTI(frame));
PyFrameObject *f = _PyFrame_GetFrameObject(frame);
if (f == NULL) {
return -1;
}
if (line != -1 && f->f_trace_lines) {
/* Trace backward edges (except in 'yield from') or if line number has changed */
int trace = line != lastline ||
(_PyInterpreterFrame_LASTI(frame) < instr_prev &&
// SEND has no quickened forms, so no need to use _PyOpcode_Deopt
// here:
frame->prev_instr->op.code != SEND);
if (trace) {
result = call_trace(func, obj, tstate, frame, PyTrace_LINE, Py_None);
}
}
/* Always emit an opcode event if we're tracing all opcodes. */
if (f->f_trace_opcodes && result == 0) {
result = call_trace(func, obj, tstate, frame, PyTrace_OPCODE, Py_None);
}
return result;
}
int
_PyEval_SetProfile(PyThreadState *tstate, Py_tracefunc func, PyObject *arg)
{
assert(is_tstate_valid(tstate));
/* The caller must hold the GIL */
assert(PyGILState_Check());
/* Call _PySys_Audit() in the context of the current thread state,
even if tstate is not the current thread state. */
PyThreadState *current_tstate = _PyThreadState_GET();
if (_PySys_Audit(current_tstate, "sys.setprofile", NULL) < 0) {
return -1;
}
tstate->c_profilefunc = func;
PyObject *old_profileobj = tstate->c_profileobj;
tstate->c_profileobj = Py_XNewRef(arg);
/* Flag that tracing or profiling is turned on */
_PyThreadState_UpdateTracingState(tstate);
// gh-98257: Only call Py_XDECREF() once the new profile function is fully
// set, so it's safe to call sys.setprofile() again (reentrant call).
Py_XDECREF(old_profileobj);
return 0;
}
void
PyEval_SetProfile(Py_tracefunc func, PyObject *arg)
{
@ -2240,33 +1999,6 @@ PyEval_SetProfileAllThreads(Py_tracefunc func, PyObject *arg)
}
}
int
_PyEval_SetTrace(PyThreadState *tstate, Py_tracefunc func, PyObject *arg)
{
assert(is_tstate_valid(tstate));
/* The caller must hold the GIL */
assert(PyGILState_Check());
/* Call _PySys_Audit() in the context of the current thread state,
even if tstate is not the current thread state. */
PyThreadState *current_tstate = _PyThreadState_GET();
if (_PySys_Audit(current_tstate, "sys.settrace", NULL) < 0) {
return -1;
}
tstate->c_tracefunc = func;
PyObject *old_traceobj = tstate->c_traceobj;
tstate->c_traceobj = Py_XNewRef(arg);
/* Flag that tracing or profiling is turned on */
_PyThreadState_UpdateTracingState(tstate);
// gh-98257: Only call Py_XDECREF() once the new trace function is fully
// set, so it's safe to call sys.settrace() again (reentrant call).
Py_XDECREF(old_traceobj);
return 0;
}
void
PyEval_SetTrace(Py_tracefunc func, PyObject *arg)
{
@ -2492,114 +2224,6 @@ PyEval_GetFuncDesc(PyObject *func)
return " object";
}
#define C_TRACE(x, call) \
if (use_tracing && tstate->c_profilefunc) { \
if (call_trace(tstate->c_profilefunc, tstate->c_profileobj, \
tstate, tstate->cframe->current_frame, \
PyTrace_C_CALL, func)) { \
x = NULL; \
} \
else { \
x = call; \
if (tstate->c_profilefunc != NULL) { \
if (x == NULL) { \
call_trace_protected(tstate->c_profilefunc, \
tstate->c_profileobj, \
tstate, tstate->cframe->current_frame, \
PyTrace_C_EXCEPTION, func); \
/* XXX should pass (type, value, tb) */ \
} else { \
if (call_trace(tstate->c_profilefunc, \
tstate->c_profileobj, \
tstate, tstate->cframe->current_frame, \
PyTrace_C_RETURN, func)) { \
Py_DECREF(x); \
x = NULL; \
} \
} \
} \
} \
} else { \
x = call; \
}
static PyObject *
trace_call_function(PyThreadState *tstate,
PyObject *func,
PyObject **args, Py_ssize_t nargs,
PyObject *kwnames)
{
int use_tracing = 1;
PyObject *x;
if (PyCFunction_CheckExact(func) || PyCMethod_CheckExact(func)) {
C_TRACE(x, PyObject_Vectorcall(func, args, nargs, kwnames));
return x;
}
else if (Py_IS_TYPE(func, &PyMethodDescr_Type) && nargs > 0) {
/* We need to create a temporary bound method as argument
for profiling.
If nargs == 0, then this cannot work because we have no
"self". In any case, the call itself would raise
TypeError (foo needs an argument), so we just skip
profiling. */
PyObject *self = args[0];
func = Py_TYPE(func)->tp_descr_get(func, self, (PyObject*)Py_TYPE(self));
if (func == NULL) {
return NULL;
}
C_TRACE(x, PyObject_Vectorcall(func,
args+1, nargs-1,
kwnames));
Py_DECREF(func);
return x;
}
return PyObject_Vectorcall(func, args, nargs | PY_VECTORCALL_ARGUMENTS_OFFSET, kwnames);
}
static PyObject *
do_call_core(PyThreadState *tstate,
PyObject *func,
PyObject *callargs,
PyObject *kwdict,
int use_tracing
)
{
PyObject *result;
if (PyCFunction_CheckExact(func) || PyCMethod_CheckExact(func)) {
C_TRACE(result, PyObject_Call(func, callargs, kwdict));
return result;
}
else if (Py_IS_TYPE(func, &PyMethodDescr_Type)) {
Py_ssize_t nargs = PyTuple_GET_SIZE(callargs);
if (nargs > 0 && use_tracing) {
/* We need to create a temporary bound method as argument
for profiling.
If nargs == 0, then this cannot work because we have no
"self". In any case, the call itself would raise
TypeError (foo needs an argument), so we just skip
profiling. */
PyObject *self = PyTuple_GET_ITEM(callargs, 0);
func = Py_TYPE(func)->tp_descr_get(func, self, (PyObject*)Py_TYPE(self));
if (func == NULL) {
return NULL;
}
C_TRACE(result, _PyObject_FastCallDictTstate(
tstate, func,
&_PyTuple_ITEMS(callargs)[1],
nargs - 1,
kwdict));
Py_DECREF(func);
return result;
}
}
EVAL_CALL_STAT_INC_IF_FUNCTION(EVAL_CALL_FUNCTION_EX, func);
return PyObject_Call(func, callargs, kwdict);
}
/* Extract a slice index from a PyLong or an object with the
nb_index slot defined, and store in *pi.
Silently reduce values larger than PY_SSIZE_T_MAX to PY_SSIZE_T_MAX,
@ -2973,69 +2597,6 @@ PyUnstable_Eval_RequestCodeExtraIndex(freefunc free)
return new_index;
}
static void
dtrace_function_entry(_PyInterpreterFrame *frame)
{
const char *filename;
const char *funcname;
int lineno;
PyCodeObject *code = frame->f_code;
filename = PyUnicode_AsUTF8(code->co_filename);
funcname = PyUnicode_AsUTF8(code->co_name);
lineno = _PyInterpreterFrame_GetLine(frame);
PyDTrace_FUNCTION_ENTRY(filename, funcname, lineno);
}
static void
dtrace_function_return(_PyInterpreterFrame *frame)
{
const char *filename;
const char *funcname;
int lineno;
PyCodeObject *code = frame->f_code;
filename = PyUnicode_AsUTF8(code->co_filename);
funcname = PyUnicode_AsUTF8(code->co_name);
lineno = _PyInterpreterFrame_GetLine(frame);
PyDTrace_FUNCTION_RETURN(filename, funcname, lineno);
}
/* DTrace equivalent of maybe_call_line_trace. */
static void
maybe_dtrace_line(_PyInterpreterFrame *frame,
PyTraceInfo *trace_info,
int instr_prev)
{
const char *co_filename, *co_name;
/* If the last instruction executed isn't in the current
instruction window, reset the window.
*/
initialize_trace_info(trace_info, frame);
int lastline = _PyCode_CheckLineNumber(instr_prev*sizeof(_Py_CODEUNIT), &trace_info->bounds);
int addr = _PyInterpreterFrame_LASTI(frame) * sizeof(_Py_CODEUNIT);
int line = _PyCode_CheckLineNumber(addr, &trace_info->bounds);
if (line != -1) {
/* Trace backward edges or first instruction of a new line */
if (_PyInterpreterFrame_LASTI(frame) < instr_prev ||
(line != lastline && addr == trace_info->bounds.ar_start))
{
co_filename = PyUnicode_AsUTF8(frame->f_code->co_filename);
if (!co_filename) {
co_filename = "?";
}
co_name = PyUnicode_AsUTF8(frame->f_code->co_name);
if (!co_name) {
co_name = "?";
}
PyDTrace_LINE(co_filename, co_name, line);
}
}
}
/* Implement Py_EnterRecursiveCall() and Py_LeaveRecursiveCall() as functions
for the limited API. */