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gh-116098: Revert "gh-107674: Improve performance of sys.settrace (GH-114986)" #116178

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Merged
merged 1 commit into from
Mar 1, 2024
Merged

gh-116098: Revert "gh-107674: Improve performance of sys.settrace (GH-114986)" #116178

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1 change: 0 additions & 1 deletion Misc/NEWS.d/next/Core and Builtins/2024-02-04-07-45-29.gh-issue-107674.q8mCmi.rst
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33 changes: 16 additions & 17 deletions Python/bytecodes.c
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Original file line number Diff line number Diff line change
Expand Up @@ -143,23 +143,22 @@ dummy_func(

tier1 inst(RESUME, (--)) {
assert(frame == tstate->current_frame);
if (tstate->tracing == 0) {
uintptr_t global_version =
_Py_atomic_load_uintptr_relaxed(&tstate->eval_breaker) &
~_PY_EVAL_EVENTS_MASK;
uintptr_t code_version = _PyFrame_GetCode(frame)->_co_instrumentation_version;
assert((code_version & 255) == 0);
if (code_version != global_version) {
int err = _Py_Instrument(_PyFrame_GetCode(frame), tstate->interp);
ERROR_IF(err, error);
next_instr = this_instr;
DISPATCH();
}
uintptr_t global_version =
_Py_atomic_load_uintptr_relaxed(&tstate->eval_breaker) &
~_PY_EVAL_EVENTS_MASK;
uintptr_t code_version = _PyFrame_GetCode(frame)->_co_instrumentation_version;
assert((code_version & 255) == 0);
if (code_version != global_version) {
int err = _Py_Instrument(_PyFrame_GetCode(frame), tstate->interp);
ERROR_IF(err, error);
next_instr = this_instr;
}
if ((oparg & RESUME_OPARG_LOCATION_MASK) < RESUME_AFTER_YIELD_FROM) {
CHECK_EVAL_BREAKER();
else {
if ((oparg & RESUME_OPARG_LOCATION_MASK) < RESUME_AFTER_YIELD_FROM) {
CHECK_EVAL_BREAKER();
}
this_instr->op.code = RESUME_CHECK;
}
this_instr->op.code = RESUME_CHECK;
}

inst(RESUME_CHECK, (--)) {
Expand All @@ -170,13 +169,13 @@ dummy_func(
uintptr_t eval_breaker = _Py_atomic_load_uintptr_relaxed(&tstate->eval_breaker);
uintptr_t version = _PyFrame_GetCode(frame)->_co_instrumentation_version;
assert((version & _PY_EVAL_EVENTS_MASK) == 0);
DEOPT_IF(eval_breaker != version && tstate->tracing == 0);
DEOPT_IF(eval_breaker != version);
}

inst(INSTRUMENTED_RESUME, (--)) {
uintptr_t global_version = _Py_atomic_load_uintptr_relaxed(&tstate->eval_breaker) & ~_PY_EVAL_EVENTS_MASK;
uintptr_t code_version = _PyFrame_GetCode(frame)->_co_instrumentation_version;
if (code_version != global_version && tstate->tracing == 0) {
if (code_version != global_version) {
if (_Py_Instrument(_PyFrame_GetCode(frame), tstate->interp)) {
GOTO_ERROR(error);
}
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28 changes: 11 additions & 17 deletions Python/ceval.c
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Original file line number Diff line number Diff line change
Expand Up @@ -806,23 +806,17 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int
{
_Py_CODEUNIT *prev = frame->instr_ptr;
_Py_CODEUNIT *here = frame->instr_ptr = next_instr;
int original_opcode = 0;
if (tstate->tracing) {
PyCodeObject *code = _PyFrame_GetCode(frame);
original_opcode = code->_co_monitoring->lines[(int)(here - _PyCode_CODE(code))].original_opcode;
} else {
_PyFrame_SetStackPointer(frame, stack_pointer);
original_opcode = _Py_call_instrumentation_line(
tstate, frame, here, prev);
stack_pointer = _PyFrame_GetStackPointer(frame);
if (original_opcode < 0) {
next_instr = here+1;
goto error;
}
next_instr = frame->instr_ptr;
if (next_instr != here) {
DISPATCH();
}
_PyFrame_SetStackPointer(frame, stack_pointer);
int original_opcode = _Py_call_instrumentation_line(
tstate, frame, here, prev);
stack_pointer = _PyFrame_GetStackPointer(frame);
if (original_opcode < 0) {
next_instr = here+1;
goto error;
}
next_instr = frame->instr_ptr;
if (next_instr != here) {
DISPATCH();
}
if (_PyOpcode_Caches[original_opcode]) {
_PyBinaryOpCache *cache = (_PyBinaryOpCache *)(next_instr+1);
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16 changes: 6 additions & 10 deletions Python/ceval_macros.h
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Original file line number Diff line number Diff line change
Expand Up @@ -339,16 +339,12 @@ do { \
// for an exception handler, displaying the traceback, and so on
#define INSTRUMENTED_JUMP(src, dest, event) \
do { \
if (tstate->tracing) {\
next_instr = dest; \
} else { \
_PyFrame_SetStackPointer(frame, stack_pointer); \
next_instr = _Py_call_instrumentation_jump(tstate, event, frame, src, dest); \
stack_pointer = _PyFrame_GetStackPointer(frame); \
if (next_instr == NULL) { \
next_instr = (dest)+1; \
goto error; \
} \
_PyFrame_SetStackPointer(frame, stack_pointer); \
next_instr = _Py_call_instrumentation_jump(tstate, event, frame, src, dest); \
stack_pointer = _PyFrame_GetStackPointer(frame); \
if (next_instr == NULL) { \
next_instr = (dest)+1; \
goto error; \
} \
} while (0);

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2 changes: 1 addition & 1 deletion Python/executor_cases.c.h
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33 changes: 16 additions & 17 deletions Python/generated_cases.c.h
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4 changes: 3 additions & 1 deletion Python/instrumentation.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1156,13 +1156,15 @@ int
_Py_call_instrumentation_line(PyThreadState *tstate, _PyInterpreterFrame* frame, _Py_CODEUNIT *instr, _Py_CODEUNIT *prev)
{
PyCodeObject *code = _PyFrame_GetCode(frame);
assert(tstate->tracing == 0);
assert(is_version_up_to_date(code, tstate->interp));
assert(instrumentation_cross_checks(tstate->interp, code));
int i = (int)(instr - _PyCode_CODE(code));

_PyCoMonitoringData *monitoring = code->_co_monitoring;
_PyCoLineInstrumentationData *line_data = &monitoring->lines[i];
if (tstate->tracing) {
goto done;
}
PyInterpreterState *interp = tstate->interp;
int8_t line_delta = line_data->line_delta;
int line = compute_line(code, i, line_delta);
Expand Down