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[3.11] GH-93516: Backport GH-93769 (GH-94231)

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* Store offset of first traceable instruction to avoid having to recompute it all the time when tracing.
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Mark Shannon 2022-06-28 16:30:22 +01:00 • committed by GitHub
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@ -5858,122 +5858,125 @@
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<parameter type-id='type-id-8' name='addrq' filepath='Objects/codeobject.c' line='745' column='1'/>
<function-decl name='PyCode_Addr2Line' mangled-name='PyCode_Addr2Line' filepath='Objects/codeobject.c' line='751' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='PyCode_Addr2Line'>
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<parameter type-id='type-id-8' name='firstlineno' filepath='Objects/codeobject.c' line='641' column='1'/>
<function-decl name='PyCode_NewEmpty' mangled-name='PyCode_NewEmpty' filepath='Objects/codeobject.c' line='647' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='PyCode_NewEmpty'>
<parameter type-id='type-id-3' name='filename' filepath='Objects/codeobject.c' line='647' column='1'/>
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<parameter type-id='type-id-8' name='firstlineno' filepath='Objects/codeobject.c' line='647' column='1'/>
<return type-id='type-id-444'/>
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<function-decl name='PyCode_New' mangled-name='PyCode_New' filepath='Objects/codeobject.c' line='616' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='PyCode_New'>
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<parameter type-id='type-id-14' name='exceptiontable' filepath='Objects/codeobject.c' line='623' column='1'/>
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<parameter type-id='type-id-14' name='exceptiontable' filepath='Objects/codeobject.c' line='629' column='1'/>
<return type-id='type-id-444'/>
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<parameter type-id='type-id-14' name='exceptiontable' filepath='Objects/codeobject.c' line='499' column='1'/>
<function-decl name='PyCode_NewWithPosOnlyArgs' mangled-name='PyCode_NewWithPosOnlyArgs' filepath='Objects/codeobject.c' line='498' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='PyCode_NewWithPosOnlyArgs'>
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<parameter type-id='type-id-8' name='flags' filepath='Objects/codeobject.c' line='499' column='1'/>
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<parameter type-id='type-id-14' name='consts' filepath='Objects/codeobject.c' line='500' column='1'/>
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<parameter type-id='type-id-14' name='linetable' filepath='Objects/codeobject.c' line='504' column='1'/>
<parameter type-id='type-id-14' name='exceptiontable' filepath='Objects/codeobject.c' line='505' column='1'/>
<return type-id='type-id-444'/>
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<class-decl name='_PyCodeConstructor' size-in-bits='896' is-struct='yes' visibility='default' filepath='./Include/internal/pycore_code.h' line='168' column='1' id='type-id-503'>
@ -7594,8 +7597,8 @@
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<function-decl name='_PyCode_New' mangled-name='_PyCode_New' filepath='Objects/codeobject.c' line='440' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='_PyCode_New'>
<parameter type-id='type-id-504' name='con' filepath='Objects/codeobject.c' line='440' column='1'/>
<function-decl name='_PyCode_New' mangled-name='_PyCode_New' filepath='Objects/codeobject.c' line='446' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='_PyCode_New'>
<parameter type-id='type-id-504' name='con' filepath='Objects/codeobject.c' line='446' column='1'/>
<return type-id='type-id-444'/>
</function-decl>
<function-decl name='_PyCode_Validate' mangled-name='_PyCode_Validate' filepath='Objects/codeobject.c' line='231' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='_PyCode_Validate'>
@ -11172,32 +11175,32 @@
<var-decl name='PyZip_Type' type-id='type-id-112' mangled-name='PyZip_Type' visibility='default' filepath='./Include/bltinmodule.h' line='9' column='1' elf-symbol-id='PyZip_Type'/>
</abi-instr>
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<function-decl name='Py_LeaveRecursiveCall' mangled-name='Py_LeaveRecursiveCall' filepath='Python/ceval.c' line='7908' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='Py_LeaveRecursiveCall'>
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<parameter type-id='type-id-104' name='free' filepath='Python/ceval.c' line='7831' column='1'/>
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<function-decl name='_PyEval_SliceIndexNotNone' mangled-name='_PyEval_SliceIndexNotNone' filepath='Python/ceval.c' line='7340' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='_PyEval_SliceIndexNotNone'>
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<function-decl name='PyEval_GetFuncDesc' mangled-name='PyEval_GetFuncDesc' filepath='Python/ceval.c' line='7191' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='PyEval_GetFuncDesc'>
<parameter type-id='type-id-14' name='ob' filepath='Objects/exceptions.c' line='421' column='1'/>
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<function-decl name='PyEval_GetFuncName' mangled-name='PyEval_GetFuncName' filepath='Python/ceval.c' line='7189' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='PyEval_GetFuncName'>
<function-decl name='PyEval_GetFuncName' mangled-name='PyEval_GetFuncName' filepath='Python/ceval.c' line='7178' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='PyEval_GetFuncName'>
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<return type-id='type-id-3'/>
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@ -11211,33 +11214,33 @@
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<function-decl name='PyEval_SetTrace' mangled-name='PyEval_SetTrace' filepath='Python/ceval.c' line='6997' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='PyEval_SetTrace'>
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@ -11363,43 +11366,43 @@
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<parameter type-id='type-id-13' name='func' filepath='Python/ceval.c' line='6976' column='1'/>
<parameter type-id='type-id-14' name='arg' filepath='Python/ceval.c' line='6976' column='1'/>
<function-decl name='_PyEval_SetTrace' mangled-name='_PyEval_SetTrace' filepath='Python/ceval.c' line='6965' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='_PyEval_SetTrace'>
<parameter type-id='type-id-10' name='tstate' filepath='Python/ceval.c' line='6965' column='1'/>
<parameter type-id='type-id-13' name='func' filepath='Python/ceval.c' line='6965' column='1'/>
<parameter type-id='type-id-14' name='arg' filepath='Python/ceval.c' line='6965' column='1'/>
<return type-id='type-id-8'/>
</function-decl>
<function-decl name='PyEval_SetProfile' mangled-name='PyEval_SetProfile' filepath='Python/ceval.c' line='6966' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='PyEval_SetProfile'>
<parameter type-id='type-id-13' name='func' filepath='Python/ceval.c' line='7008' column='1'/>
<parameter type-id='type-id-14' name='arg' filepath='Python/ceval.c' line='7008' column='1'/>
<function-decl name='PyEval_SetProfile' mangled-name='PyEval_SetProfile' filepath='Python/ceval.c' line='6955' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='PyEval_SetProfile'>
<parameter type-id='type-id-13' name='func' filepath='Python/ceval.c' line='6997' column='1'/>
<parameter type-id='type-id-14' name='arg' filepath='Python/ceval.c' line='6997' column='1'/>
<return type-id='type-id-70'/>
</function-decl>
<function-decl name='_PyEval_SetProfile' mangled-name='_PyEval_SetProfile' filepath='Python/ceval.c' line='6935' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='_PyEval_SetProfile'>
<parameter type-id='type-id-10' name='tstate' filepath='Python/ceval.c' line='6976' column='1'/>
<parameter type-id='type-id-13' name='func' filepath='Python/ceval.c' line='6976' column='1'/>
<parameter type-id='type-id-14' name='arg' filepath='Python/ceval.c' line='6976' column='1'/>
<function-decl name='_PyEval_SetProfile' mangled-name='_PyEval_SetProfile' filepath='Python/ceval.c' line='6924' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='_PyEval_SetProfile'>
<parameter type-id='type-id-10' name='tstate' filepath='Python/ceval.c' line='6965' column='1'/>
<parameter type-id='type-id-13' name='func' filepath='Python/ceval.c' line='6965' column='1'/>
<parameter type-id='type-id-14' name='arg' filepath='Python/ceval.c' line='6965' column='1'/>
<return type-id='type-id-8'/>
</function-decl>
<function-decl name='PyThreadState_LeaveTracing' mangled-name='PyThreadState_LeaveTracing' filepath='Python/ceval.c' line='6834' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='PyThreadState_LeaveTracing'>
<function-decl name='PyThreadState_LeaveTracing' mangled-name='PyThreadState_LeaveTracing' filepath='Python/ceval.c' line='6828' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='PyThreadState_LeaveTracing'>
<parameter type-id='type-id-10' name='tstate' filepath='Objects/object.c' line='2291' column='1'/>
<return type-id='type-id-70'/>
</function-decl>
<function-decl name='PyThreadState_EnterTracing' mangled-name='PyThreadState_EnterTracing' filepath='Python/ceval.c' line='6828' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='PyThreadState_EnterTracing'>
<function-decl name='PyThreadState_EnterTracing' mangled-name='PyThreadState_EnterTracing' filepath='Python/ceval.c' line='6822' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='PyThreadState_EnterTracing'>
<parameter type-id='type-id-10' name='tstate' filepath='Objects/object.c' line='2291' column='1'/>
<return type-id='type-id-70'/>
</function-decl>
<function-decl name='PyEval_EvalCodeEx' mangled-name='PyEval_EvalCodeEx' filepath='Python/ceval.c' line='6431' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='PyEval_EvalCodeEx'>
<parameter type-id='type-id-14' name='_co' filepath='Python/ceval.c' line='6431' column='1'/>
<parameter type-id='type-id-14' name='globals' filepath='Python/ceval.c' line='6431' column='1'/>
<parameter type-id='type-id-14' name='locals' filepath='Python/ceval.c' line='6431' column='1'/>
<parameter type-id='type-id-200' name='args' filepath='Python/ceval.c' line='6432' column='1'/>
<parameter type-id='type-id-8' name='argcount' filepath='Python/ceval.c' line='6432' column='1'/>
<parameter type-id='type-id-200' name='kws' filepath='Python/ceval.c' line='6433' column='1'/>
<parameter type-id='type-id-8' name='kwcount' filepath='Python/ceval.c' line='6433' column='1'/>
<parameter type-id='type-id-200' name='defs' filepath='Python/ceval.c' line='6434' column='1'/>
<parameter type-id='type-id-8' name='defcount' filepath='Python/ceval.c' line='6434' column='1'/>
<parameter type-id='type-id-14' name='kwdefs' filepath='Python/ceval.c' line='6435' column='1'/>
<parameter type-id='type-id-14' name='closure' filepath='Python/ceval.c' line='6435' column='1'/>
<function-decl name='PyEval_EvalCodeEx' mangled-name='PyEval_EvalCodeEx' filepath='Python/ceval.c' line='6425' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='PyEval_EvalCodeEx'>
<parameter type-id='type-id-14' name='_co' filepath='Python/ceval.c' line='6425' column='1'/>
<parameter type-id='type-id-14' name='globals' filepath='Python/ceval.c' line='6425' column='1'/>
<parameter type-id='type-id-14' name='locals' filepath='Python/ceval.c' line='6425' column='1'/>
<parameter type-id='type-id-200' name='args' filepath='Python/ceval.c' line='6426' column='1'/>
<parameter type-id='type-id-8' name='argcount' filepath='Python/ceval.c' line='6426' column='1'/>
<parameter type-id='type-id-200' name='kws' filepath='Python/ceval.c' line='6427' column='1'/>
<parameter type-id='type-id-8' name='kwcount' filepath='Python/ceval.c' line='6427' column='1'/>
<parameter type-id='type-id-200' name='defs' filepath='Python/ceval.c' line='6428' column='1'/>
<parameter type-id='type-id-8' name='defcount' filepath='Python/ceval.c' line='6428' column='1'/>
<parameter type-id='type-id-14' name='kwdefs' filepath='Python/ceval.c' line='6429' column='1'/>
<parameter type-id='type-id-14' name='closure' filepath='Python/ceval.c' line='6429' column='1'/>
<return type-id='type-id-14'/>
</function-decl>
<typedef-decl name='_PyInterpreterFrame' type-id='type-id-375' filepath='./Include/internal/pycore_frame.h' line='67' column='1' id='type-id-596'/>
@ -14919,7 +14922,7 @@
<return type-id='type-id-14'/>
</function-decl>
<function-decl name='PyRun_SimpleString' mangled-name='PyRun_SimpleString' filepath='Python/pythonrun.c' line='1976' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='PyRun_SimpleString'>
<parameter type-id='type-id-3' name='where' filepath='Python/ceval.c' line='7912' column='1'/>
<parameter type-id='type-id-3' name='where' filepath='Python/ceval.c' line='7901' column='1'/>
<return type-id='type-id-8'/>
</function-decl>
<function-decl name='PyRun_String' mangled-name='PyRun_String' filepath='Python/pythonrun.c' line='1969' column='1' visibility='default' binding='global' size-in-bits='64' elf-symbol-id='PyRun_String'>

1
Include/cpython/code.h
View file

@ -91,6 +91,7 @@ typedef uint16_t _Py_CODEUNIT;
PyObject *co_weakreflist; /* to support weakrefs to code objects */ \
PyObject *_co_code; /* cached co_code object/attribute */ \
char *_co_linearray; /* array of line offsets */ \
int _co_firsttraceable; /* index of first traceable instruction */ \
/* Scratch space for extra data relating to the code object. \
Type is a void* to keep the format private in codeobject.c to force \
people to go through the proper APIs. */ \

2
Lib/opcode.py
View file

@ -175,7 +175,7 @@ def_op('LOAD_CLASSDEREF', 148)
hasfree.append(148)
def_op('COPY_FREE_VARS', 149)
def_op('RESUME', 151)
def_op('RESUME', 151) # This must be kept in sync with deepfreeze.py
def_op('MATCH_CLASS', 152)
def_op('FORMAT_VALUE', 155)

2
Misc/NEWS.d/next/Core and Builtins/2022-06-13-13-55-34.gh-issue-93516.HILrDl.rst Normal file
View file

@ -0,0 +1,2 @@
Store offset of first traceable instruction in code object to avoid having
to recompute it for each instruction when tracing.

6
Objects/codeobject.c
View file

@ -341,6 +341,12 @@ init_code(PyCodeObject *co, struct _PyCodeConstructor *con)
co->_co_linearray = NULL;
memcpy(_PyCode_CODE(co), PyBytes_AS_STRING(con->code),
PyBytes_GET_SIZE(con->code));
int entry_point = 0;
while (entry_point < Py_SIZE(co) &&
_Py_OPCODE(_PyCode_CODE(co)[entry_point]) != RESUME) {
entry_point++;
}
co->_co_firsttraceable = entry_point;
}
static int

91
Python/ceval.c
View file

@ -5608,57 +5608,51 @@ handle_eval_breaker:
case DO_TRACING:
#endif
{
if (tstate->tracing == 0) {
if (tstate->tracing == 0 &&
INSTR_OFFSET() >= frame->f_code->_co_firsttraceable
) {
assert(
_PyOpcode_Deopt[first_instr[frame->f_code->_co_firsttraceable]]
== RESUME
);
int instr_prev = _PyInterpreterFrame_LASTI(frame);
frame->prev_instr = next_instr;
TRACING_NEXTOPARG();
switch(opcode) {
case COPY_FREE_VARS:
case MAKE_CELL:
case RETURN_GENERATOR:
/* Frame not fully initialized */
break;
case RESUME:
if (oparg < 2) {
CHECK_EVAL_BREAKER();
}
/* Call tracing */
TRACE_FUNCTION_ENTRY();
DTRACE_FUNCTION_ENTRY();
break;
case POP_TOP:
if (_Py_OPCODE(next_instr[-1]) == RETURN_GENERATOR) {
/* Frame not fully initialized */
break;
}
/* fall through */
default:
/* line-by-line tracing support */
if (PyDTrace_LINE_ENABLED()) {
maybe_dtrace_line(frame, &tstate->trace_info, instr_prev);
}
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);
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);
if (err) {
/* trace function raised an exception */
next_instr++;
goto error;
}
/* Reload possibly changed frame fields */
next_instr = frame->prev_instr;
stack_pointer = _PyFrame_GetStackPointer(frame);
frame->stacktop = -1;
err = maybe_call_line_trace(tstate->c_tracefunc,
tstate->c_traceobj,
tstate, frame, instr_prev);
if (err) {
/* trace function raised an exception */
next_instr++;
goto error;
}
/* Reload possibly changed frame fields */
next_instr = frame->prev_instr;
stack_pointer = _PyFrame_GetStackPointer(frame);
frame->stacktop = -1;
}
}
}
TRACING_NEXTOPARG();
@ -6896,13 +6890,8 @@ maybe_call_line_trace(Py_tracefunc func, PyObject *obj,
if (_PyCode_InitLineArray(frame->f_code)) {
return -1;
}
int entry_point = 0;
_Py_CODEUNIT *code = _PyCode_CODE(frame->f_code);
while (_PyOpcode_Deopt[_Py_OPCODE(code[entry_point])] != RESUME) {
entry_point++;
}
int lastline;
if (instr_prev <= entry_point) {
if (instr_prev <= frame->f_code->_co_firsttraceable) {
lastline = -1;
}
else {

7
Tools/scripts/deepfreeze.py
View file

@ -22,6 +22,9 @@ from generate_global_objects import get_identifiers_and_strings
verbose = False
identifiers, strings = get_identifiers_and_strings()
# This must be kept in sync with opcode.py
RESUME = 151
def isprintable(b: bytes) -> bool:
return all(0x20 <= c < 0x7f for c in b)
@ -284,6 +287,10 @@ class Printer:
self.write(f"._co_code = NULL,")
self.write("._co_linearray = NULL,")
self.write(f".co_code_adaptive = {co_code_adaptive},")
for i, op in enumerate(code.co_code[::2]):
if op == RESUME:
self.write(f"._co_firsttraceable = {i},")
break
name_as_code = f"(PyCodeObject *)&{name}"
self.deallocs.append(f"_PyStaticCode_Dealloc({name_as_code});")
self.interns.append(f"_PyStaticCode_InternStrings({name_as_code})")