[Python-checkins] bpo-44348: Move trace-info to thread-state (GH-26623)
markshannon
webhook-mailer at python.org
Thu Jun 10 03:47:09 EDT 2021
https://github.com/python/cpython/commit/54cb63863f19a7c64d9a3a5fd97bdfc0dd7ab374
commit: 54cb63863f19a7c64d9a3a5fd97bdfc0dd7ab374
branch: main
author: Mark Shannon <mark at hotpy.org>
committer: markshannon <mark at hotpy.org>
date: 2021-06-10T08:46:59+01:00
summary:
bpo-44348: Move trace-info to thread-state (GH-26623)
* Move trace-info to thread state.
* Correct output for pdb when turning on tracing in middle of line
files:
M Include/cpython/pystate.h
M Lib/test/test_pdb.py
M Python/ceval.c
M Python/pystate.c
diff --git a/Include/cpython/pystate.h b/Include/cpython/pystate.h
index 1049eda3e5160..56ea8d03453c1 100644
--- a/Include/cpython/pystate.h
+++ b/Include/cpython/pystate.h
@@ -29,6 +29,11 @@ typedef int (*Py_tracefunc)(PyObject *, PyFrameObject *, int, PyObject *);
#define PyTrace_OPCODE 7
+typedef struct {
+ PyCodeObject *code; // The code object for the bounds. May be NULL.
+ PyCodeAddressRange bounds; // Only valid if code != NULL.
+} PyTraceInfo;
+
typedef struct _cframe {
/* This struct will be threaded through the C stack
* allowing fast access to per-thread state that needs
@@ -160,6 +165,7 @@ struct _ts {
uint64_t id;
CFrame root_cframe;
+ PyTraceInfo trace_info;
_PyStackChunk *datastack_chunk;
PyObject **datastack_top;
diff --git a/Lib/test/test_pdb.py b/Lib/test/test_pdb.py
index cd096e7dd56e8..08c0ffac591e8 100644
--- a/Lib/test/test_pdb.py
+++ b/Lib/test/test_pdb.py
@@ -1288,8 +1288,8 @@ def test_pdb_issue_20766():
-> print('pdb %d: %s' % (i, sess._previous_sigint_handler))
(Pdb) continue
pdb 1: <built-in function default_int_handler>
- > <doctest test.test_pdb.test_pdb_issue_20766[0]>(5)test_function()
- -> sess.set_trace(sys._getframe())
+ > <doctest test.test_pdb.test_pdb_issue_20766[0]>(6)test_function()
+ -> print('pdb %d: %s' % (i, sess._previous_sigint_handler))
(Pdb) continue
pdb 2: <built-in function default_int_handler>
"""
diff --git a/Python/ceval.c b/Python/ceval.c
index 46133c9fe28dc..c42404c692bb9 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -36,14 +36,6 @@
#include <ctype.h>
-typedef struct {
- PyCodeObject *code; // The code object for the bounds. May be NULL.
- int instr_prev; // Only valid if code != NULL.
- PyCodeAddressRange bounds; // Only valid if code != NULL.
- CFrame cframe;
-} PyTraceInfo;
-
-
#ifdef Py_DEBUG
/* For debugging the interpreter: */
#define LLTRACE 1 /* Low-level trace feature */
@@ -58,11 +50,11 @@ _Py_IDENTIFIER(__name__);
/* Forward declarations */
Py_LOCAL_INLINE(PyObject *) call_function(
- PyThreadState *tstate, PyTraceInfo *, PyObject ***pp_stack,
- Py_ssize_t oparg, PyObject *kwnames);
+ PyThreadState *tstate, PyObject ***pp_stack,
+ Py_ssize_t oparg, PyObject *kwnames, int use_tracing);
static PyObject * do_call_core(
- PyThreadState *tstate, PyTraceInfo *, PyObject *func,
- PyObject *callargs, PyObject *kwdict);
+ PyThreadState *tstate, PyObject *func,
+ PyObject *callargs, PyObject *kwdict, int use_tracing);
#ifdef LLTRACE
static int lltrace;
@@ -70,19 +62,15 @@ static int prtrace(PyThreadState *, PyObject *, const char *);
#endif
static int call_trace(Py_tracefunc, PyObject *,
PyThreadState *, PyFrameObject *,
- PyTraceInfo *,
int, PyObject *);
static int call_trace_protected(Py_tracefunc, PyObject *,
PyThreadState *, PyFrameObject *,
- PyTraceInfo *,
int, PyObject *);
static void call_exc_trace(Py_tracefunc, PyObject *,
- PyThreadState *, PyFrameObject *,
- PyTraceInfo *trace_info);
+ PyThreadState *, PyFrameObject *);
static int maybe_call_line_trace(Py_tracefunc, PyObject *,
- PyThreadState *, PyFrameObject *,
- PyTraceInfo *);
-static void maybe_dtrace_line(PyFrameObject *, PyTraceInfo *);
+ PyThreadState *, PyFrameObject *, int);
+static void maybe_dtrace_line(PyFrameObject *, PyTraceInfo *, int);
static void dtrace_function_entry(PyFrameObject *);
static void dtrace_function_return(PyFrameObject *);
@@ -1310,7 +1298,7 @@ eval_frame_handle_pending(PyThreadState *tstate)
#define DISPATCH() \
{ \
- if (trace_info.cframe.use_tracing OR_DTRACE_LINE OR_LLTRACE) { \
+ if (cframe.use_tracing OR_DTRACE_LINE OR_LLTRACE) { \
goto tracing_dispatch; \
} \
f->f_lasti = INSTR_OFFSET(); \
@@ -1604,25 +1592,23 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
return NULL;
}
- PyTraceInfo trace_info;
- /* Mark trace_info as uninitialized */
- trace_info.code = NULL;
+ CFrame cframe;
/* WARNING: Because the CFrame lives on the C stack,
* but can be accessed from a heap allocated object (tstate)
* strict stack discipline must be maintained.
*/
CFrame *prev_cframe = tstate->cframe;
- trace_info.cframe.use_tracing = prev_cframe->use_tracing;
- trace_info.cframe.previous = prev_cframe;
- tstate->cframe = &trace_info.cframe;
+ cframe.use_tracing = prev_cframe->use_tracing;
+ cframe.previous = prev_cframe;
+ tstate->cframe = &cframe;
/* push frame */
tstate->frame = f;
specials = f->f_valuestack - FRAME_SPECIALS_SIZE;
co = f->f_code;
- if (trace_info.cframe.use_tracing) {
+ if (cframe.use_tracing) {
if (tstate->c_tracefunc != NULL) {
/* tstate->c_tracefunc, if defined, is a
function that will be called on *every* entry
@@ -1639,7 +1625,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
whenever an exception is detected. */
if (call_trace_protected(tstate->c_tracefunc,
tstate->c_traceobj,
- tstate, f, &trace_info,
+ tstate, f,
PyTrace_CALL, Py_None)) {
/* Trace function raised an error */
goto exit_eval_frame;
@@ -1650,7 +1636,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
return itself and isn't called for "line" events */
if (call_trace_protected(tstate->c_profilefunc,
tstate->c_profileobj,
- tstate, f, &trace_info,
+ tstate, f,
PyTrace_CALL, Py_None)) {
/* Profile function raised an error */
goto exit_eval_frame;
@@ -1780,15 +1766,17 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
}
tracing_dispatch:
+ {
+ int instr_prev = f->f_lasti;
f->f_lasti = INSTR_OFFSET();
TRACING_NEXTOPARG();
if (PyDTrace_LINE_ENABLED())
- maybe_dtrace_line(f, &trace_info);
+ maybe_dtrace_line(f, &tstate->trace_info, instr_prev);
/* line-by-line tracing support */
- if (trace_info.cframe.use_tracing &&
+ if (cframe.use_tracing &&
tstate->c_tracefunc != NULL && !tstate->tracing) {
int err;
/* see maybe_call_line_trace()
@@ -1797,8 +1785,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
err = maybe_call_line_trace(tstate->c_tracefunc,
tstate->c_traceobj,
- tstate, f,
- &trace_info);
+ tstate, f, instr_prev);
if (err) {
/* trace function raised an exception */
goto error;
@@ -1809,6 +1796,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
f->f_stackdepth = -1;
NEXTOPARG();
}
+ }
#ifdef LLTRACE
/* Instruction tracing */
@@ -2586,7 +2574,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
if (retval == NULL) {
if (tstate->c_tracefunc != NULL
&& _PyErr_ExceptionMatches(tstate, PyExc_StopIteration))
- call_exc_trace(tstate->c_tracefunc, tstate->c_traceobj, tstate, f, &trace_info);
+ call_exc_trace(tstate->c_tracefunc, tstate->c_traceobj, tstate, f);
if (_PyGen_FetchStopIterationValue(&retval) == 0) {
gen_status = PYGEN_RETURN;
}
@@ -4007,7 +3995,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
goto error;
}
else if (tstate->c_tracefunc != NULL) {
- call_exc_trace(tstate->c_tracefunc, tstate->c_traceobj, tstate, f, &trace_info);
+ call_exc_trace(tstate->c_tracefunc, tstate->c_traceobj, tstate, f);
}
_PyErr_Clear(tstate);
}
@@ -4198,7 +4186,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
make it accept the `self` as a first argument.
*/
meth_found = (PEEK(oparg + 2) != NULL);
- res = call_function(tstate, &trace_info, &sp, oparg + meth_found, NULL);
+ res = call_function(tstate, &sp, oparg + meth_found, NULL, cframe.use_tracing);
stack_pointer = sp;
STACK_SHRINK(1 - meth_found);
@@ -4220,7 +4208,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
sp = stack_pointer;
meth_found = (PEEK(oparg + 2) != NULL);
- res = call_function(tstate, &trace_info, &sp, oparg + meth_found, names);
+ res = call_function(tstate, &sp, oparg + meth_found, names, cframe.use_tracing);
stack_pointer = sp;
STACK_SHRINK(1 - meth_found);
@@ -4236,7 +4224,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
PREDICTED(CALL_FUNCTION);
PyObject **sp, *res;
sp = stack_pointer;
- res = call_function(tstate, &trace_info, &sp, oparg, NULL);
+ res = call_function(tstate, &sp, oparg, NULL, cframe.use_tracing);
stack_pointer = sp;
PUSH(res);
if (res == NULL) {
@@ -4254,7 +4242,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
assert(PyTuple_GET_SIZE(names) <= oparg);
/* We assume without checking that names contains only strings */
sp = stack_pointer;
- res = call_function(tstate, &trace_info, &sp, oparg, names);
+ res = call_function(tstate, &sp, oparg, names, cframe.use_tracing);
stack_pointer = sp;
PUSH(res);
Py_DECREF(names);
@@ -4300,7 +4288,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
}
assert(PyTuple_CheckExact(callargs));
- result = do_call_core(tstate, &trace_info, func, callargs, kwargs);
+ result = do_call_core(tstate, func, callargs, kwargs, cframe.use_tracing);
Py_DECREF(func);
Py_DECREF(callargs);
Py_XDECREF(kwargs);
@@ -4492,7 +4480,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
assert(f->f_state == FRAME_EXECUTING);
f->f_state = FRAME_UNWINDING;
call_exc_trace(tstate->c_tracefunc, tstate->c_traceobj,
- tstate, f, &trace_info);
+ tstate, f);
}
exception_unwind:
@@ -4536,9 +4524,6 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
PUSH(val);
PUSH(exc);
JUMPTO(handler);
- if (trace_info.cframe.use_tracing) {
- trace_info.instr_prev = INT_MAX;
- }
/* Resume normal execution */
f->f_state = FRAME_EXECUTING;
f->f_lasti = handler;
@@ -4557,16 +4542,16 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
f->f_stackdepth = 0;
f->f_state = FRAME_RAISED;
exiting:
- if (trace_info.cframe.use_tracing) {
+ if (cframe.use_tracing) {
if (tstate->c_tracefunc) {
if (call_trace_protected(tstate->c_tracefunc, tstate->c_traceobj,
- tstate, f, &trace_info, PyTrace_RETURN, retval)) {
+ tstate, f, PyTrace_RETURN, retval)) {
Py_CLEAR(retval);
}
}
if (tstate->c_profilefunc) {
if (call_trace_protected(tstate->c_profilefunc, tstate->c_profileobj,
- tstate, f, &trace_info, PyTrace_RETURN, retval)) {
+ tstate, f, PyTrace_RETURN, retval)) {
Py_CLEAR(retval);
}
}
@@ -4575,8 +4560,8 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
/* pop frame */
exit_eval_frame:
/* Restore previous cframe */
- tstate->cframe = trace_info.cframe.previous;
- tstate->cframe->use_tracing = trace_info.cframe.use_tracing;
+ tstate->cframe = cframe.previous;
+ tstate->cframe->use_tracing = cframe.use_tracing;
if (PyDTrace_FUNCTION_RETURN_ENABLED())
dtrace_function_return(f);
@@ -5515,8 +5500,7 @@ prtrace(PyThreadState *tstate, PyObject *v, const char *str)
static void
call_exc_trace(Py_tracefunc func, PyObject *self,
PyThreadState *tstate,
- PyFrameObject *f,
- PyTraceInfo *trace_info)
+ PyFrameObject *f)
{
PyObject *type, *value, *traceback, *orig_traceback, *arg;
int err;
@@ -5532,7 +5516,7 @@ call_exc_trace(Py_tracefunc func, PyObject *self,
_PyErr_Restore(tstate, type, value, orig_traceback);
return;
}
- err = call_trace(func, self, tstate, f, trace_info, PyTrace_EXCEPTION, arg);
+ err = call_trace(func, self, tstate, f, PyTrace_EXCEPTION, arg);
Py_DECREF(arg);
if (err == 0) {
_PyErr_Restore(tstate, type, value, orig_traceback);
@@ -5547,13 +5531,12 @@ call_exc_trace(Py_tracefunc func, PyObject *self,
static int
call_trace_protected(Py_tracefunc func, PyObject *obj,
PyThreadState *tstate, PyFrameObject *frame,
- PyTraceInfo *trace_info,
int what, PyObject *arg)
{
PyObject *type, *value, *traceback;
int err;
_PyErr_Fetch(tstate, &type, &value, &traceback);
- err = call_trace(func, obj, tstate, frame, trace_info, what, arg);
+ err = call_trace(func, obj, tstate, frame, what, arg);
if (err == 0)
{
_PyErr_Restore(tstate, type, value, traceback);
@@ -5572,7 +5555,6 @@ initialize_trace_info(PyTraceInfo *trace_info, PyFrameObject *frame)
{
if (trace_info->code != frame->f_code) {
trace_info->code = frame->f_code;
- trace_info->instr_prev = -1;
_PyCode_InitAddressRange(frame->f_code, &trace_info->bounds);
}
}
@@ -5580,7 +5562,6 @@ initialize_trace_info(PyTraceInfo *trace_info, PyFrameObject *frame)
static int
call_trace(Py_tracefunc func, PyObject *obj,
PyThreadState *tstate, PyFrameObject *frame,
- PyTraceInfo *trace_info,
int what, PyObject *arg)
{
int result;
@@ -5592,8 +5573,8 @@ call_trace(Py_tracefunc func, PyObject *obj,
frame->f_lineno = frame->f_code->co_firstlineno;
}
else {
- initialize_trace_info(trace_info, frame);
- frame->f_lineno = _PyCode_CheckLineNumber(frame->f_lasti*2, &trace_info->bounds);
+ initialize_trace_info(&tstate->trace_info, frame);
+ frame->f_lineno = _PyCode_CheckLineNumber(frame->f_lasti*2, &tstate->trace_info.bounds);
}
result = func(obj, frame, what, arg);
frame->f_lineno = 0;
@@ -5623,8 +5604,7 @@ _PyEval_CallTracing(PyObject *func, PyObject *args)
/* 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, PyFrameObject *frame,
- PyTraceInfo *trace_info)
+ PyThreadState *tstate, PyFrameObject *frame, int instr_prev)
{
int result = 0;
@@ -5632,22 +5612,21 @@ maybe_call_line_trace(Py_tracefunc func, PyObject *obj,
represents a jump backwards, update the frame's line number and
then call the trace function if we're tracing source lines.
*/
- initialize_trace_info(trace_info, frame);
- int lastline = trace_info->bounds.ar_line;
- int line = _PyCode_CheckLineNumber(frame->f_lasti*2, &trace_info->bounds);
+ initialize_trace_info(&tstate->trace_info, frame);
+ int lastline = _PyCode_CheckLineNumber(instr_prev*2, &tstate->trace_info.bounds);
+ int line = _PyCode_CheckLineNumber(frame->f_lasti*2, &tstate->trace_info.bounds);
if (line != -1 && frame->f_trace_lines) {
/* Trace backward edges or first instruction of a new line */
- if (frame->f_lasti < trace_info->instr_prev ||
- (line != lastline && frame->f_lasti*2 == trace_info->bounds.ar_start))
+ if (frame->f_lasti < instr_prev ||
+ (line != lastline && frame->f_lasti*2 == tstate->trace_info.bounds.ar_start))
{
- result = call_trace(func, obj, tstate, frame, trace_info, PyTrace_LINE, Py_None);
+ result = call_trace(func, obj, tstate, frame, PyTrace_LINE, Py_None);
}
}
/* Always emit an opcode event if we're tracing all opcodes. */
if (frame->f_trace_opcodes) {
- result = call_trace(func, obj, tstate, frame, trace_info, PyTrace_OPCODE, Py_None);
+ result = call_trace(func, obj, tstate, frame, PyTrace_OPCODE, Py_None);
}
- trace_info->instr_prev = frame->f_lasti;
return result;
}
@@ -5914,9 +5893,9 @@ PyEval_GetFuncDesc(PyObject *func)
}
#define C_TRACE(x, call) \
-if (trace_info->cframe.use_tracing && tstate->c_profilefunc) { \
+if (use_tracing && tstate->c_profilefunc) { \
if (call_trace(tstate->c_profilefunc, tstate->c_profileobj, \
- tstate, tstate->frame, trace_info, \
+ tstate, tstate->frame, \
PyTrace_C_CALL, func)) { \
x = NULL; \
} \
@@ -5926,13 +5905,13 @@ if (trace_info->cframe.use_tracing && tstate->c_profilefunc) { \
if (x == NULL) { \
call_trace_protected(tstate->c_profilefunc, \
tstate->c_profileobj, \
- tstate, tstate->frame, trace_info, \
+ tstate, tstate->frame, \
PyTrace_C_EXCEPTION, func); \
/* XXX should pass (type, value, tb) */ \
} else { \
if (call_trace(tstate->c_profilefunc, \
tstate->c_profileobj, \
- tstate, tstate->frame, trace_info, \
+ tstate, tstate->frame, \
PyTrace_C_RETURN, func)) { \
Py_DECREF(x); \
x = NULL; \
@@ -5947,11 +5926,11 @@ if (trace_info->cframe.use_tracing && tstate->c_profilefunc) { \
static PyObject *
trace_call_function(PyThreadState *tstate,
- PyTraceInfo *trace_info,
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));
@@ -5983,10 +5962,10 @@ trace_call_function(PyThreadState *tstate,
to reduce the stack consumption. */
Py_LOCAL_INLINE(PyObject *) _Py_HOT_FUNCTION
call_function(PyThreadState *tstate,
- PyTraceInfo *trace_info,
PyObject ***pp_stack,
Py_ssize_t oparg,
- PyObject *kwnames)
+ PyObject *kwnames,
+ int use_tracing)
{
PyObject **pfunc = (*pp_stack) - oparg - 1;
PyObject *func = *pfunc;
@@ -5995,8 +5974,8 @@ call_function(PyThreadState *tstate,
Py_ssize_t nargs = oparg - nkwargs;
PyObject **stack = (*pp_stack) - nargs - nkwargs;
- if (trace_info->cframe.use_tracing) {
- x = trace_call_function(tstate, trace_info, func, stack, nargs, kwnames);
+ if (use_tracing) {
+ x = trace_call_function(tstate, func, stack, nargs, kwnames);
}
else {
x = PyObject_Vectorcall(func, stack, nargs | PY_VECTORCALL_ARGUMENTS_OFFSET, kwnames);
@@ -6015,10 +5994,11 @@ call_function(PyThreadState *tstate,
static PyObject *
do_call_core(PyThreadState *tstate,
- PyTraceInfo *trace_info,
PyObject *func,
PyObject *callargs,
- PyObject *kwdict)
+ PyObject *kwdict,
+ int use_tracing
+ )
{
PyObject *result;
@@ -6028,7 +6008,7 @@ do_call_core(PyThreadState *tstate,
}
else if (Py_IS_TYPE(func, &PyMethodDescr_Type)) {
Py_ssize_t nargs = PyTuple_GET_SIZE(callargs);
- if (nargs > 0 && trace_info->cframe.use_tracing) {
+ if (nargs > 0 && use_tracing) {
/* We need to create a temporary bound method as argument
for profiling.
@@ -6587,7 +6567,8 @@ dtrace_function_return(PyFrameObject *f)
/* DTrace equivalent of maybe_call_line_trace. */
static void
maybe_dtrace_line(PyFrameObject *frame,
- PyTraceInfo *trace_info)
+ PyTraceInfo *trace_info,
+ int instr_prev)
{
const char *co_filename, *co_name;
@@ -6599,7 +6580,7 @@ maybe_dtrace_line(PyFrameObject *frame,
/* 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 call the trace function. */
- if (line != frame->f_lineno || frame->f_lasti < trace_info->instr_prev) {
+ if (line != frame->f_lineno || frame->f_lasti < instr_prev) {
if (line != -1) {
frame->f_lineno = line;
co_filename = PyUnicode_AsUTF8(frame->f_code->co_filename);
@@ -6611,7 +6592,6 @@ maybe_dtrace_line(PyFrameObject *frame,
PyDTrace_LINE(co_filename, co_name, line);
}
}
- trace_info->instr_prev = frame->f_lasti;
}
diff --git a/Python/pystate.c b/Python/pystate.c
index 4a3cb24a199f1..a94a615f39569 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -688,6 +688,8 @@ new_threadstate(PyInterpreterState *interp, int init)
/* If top points to entry 0, then _PyThreadState_PopLocals will try to pop this chunk */
tstate->datastack_top = &tstate->datastack_chunk->data[1];
tstate->datastack_limit = (PyObject **)(((char *)tstate->datastack_chunk) + DATA_STACK_CHUNK_SIZE);
+ /* Mark trace_info as uninitialized */
+ tstate->trace_info.code = NULL;
if (init) {
_PyThreadState_Init(tstate);
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