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cpython/Python/executor.c at issue-101100-difflib · sobolevn/cpython · GitHub
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executor.c
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#include
"Python.h"
#include
"opcode.h"
#include
"pycore_call.h"
#include
"pycore_ceval.h"
#include
"pycore_dict.h"
#include
"pycore_emscripten_signal.h"
#include
"pycore_intrinsics.h"
#include
"pycore_long.h"
#include
"pycore_object.h"
#include
"pycore_opcode_metadata.h"
#include
"pycore_opcode_utils.h"
#include
"pycore_pyerrors.h"
#include
"pycore_range.h"
#include
"pycore_setobject.h"
// _PySet_Update()
#include
"pycore_sliceobject.h"
#include
"pycore_uops.h"
#define
TIER_TWO
2
#include
"ceval_macros.h"
#undef
ASSERT_KWNAMES_IS_NULL
#define
ASSERT_KWNAMES_IS_NULL
() (void)0
#undef
DEOPT_IF
#define
DEOPT_IF
(
COND
,
INSTNAME
) \
if ((COND)) { \
goto deoptimize; \
}
#undef
ENABLE_SPECIALIZATION
#define
ENABLE_SPECIALIZATION
0
_PyInterpreterFrame
*
_PyUopExecute
(
_PyExecutorObject
*
executor
,
_PyInterpreterFrame
*
frame
,
PyObject
*
*
stack_pointer
)
{
#ifdef
Py_DEBUG
char
*
uop_debug
=
Py_GETENV
(
"PYTHONUOPSDEBUG"
);
int
lltrace
=
0
;
if
(
uop_debug
!=
NULL
&&
*
uop_debug
>=
'0'
) {
lltrace
=
*
uop_debug
-
'0'
;
// TODO: Parse an int and all that
}
#define
DPRINTF
(
level
, ...) \
if (lltrace >= (level)) { printf(__VA_ARGS__); }
#else
#define
DPRINTF
(
level
, ...)
#endif
DPRINTF
(
3
,
"Entering _PyUopExecute for %s (%s:%d) at byte offset %ld\n"
,
PyUnicode_AsUTF8
(
_PyFrame_GetCode
(
frame
)
->
co_qualname
),
PyUnicode_AsUTF8
(
_PyFrame_GetCode
(
frame
)
->
co_filename
),
_PyFrame_GetCode
(
frame
)
->
co_firstlineno
,
2
*
(
long
)(
frame
->
prev_instr
+
1
-
(
_Py_CODEUNIT
*
)
_PyFrame_GetCode
(
frame
)
->
co_code_adaptive
));
PyThreadState
*
tstate
=
_PyThreadState_GET
();
_PyUOpExecutorObject
*
self
=
(
_PyUOpExecutorObject
*
)
executor
;
CHECK_EVAL_BREAKER
();
OBJECT_STAT_INC
(
optimization_traces_executed
);
_Py_CODEUNIT
*
ip_offset
=
(
_Py_CODEUNIT
*
)
_PyFrame_GetCode
(
frame
)
->
co_code_adaptive
;
int
pc
=
0
;
int
opcode
;
int
oparg
;
uint64_t
operand
;
for
(;;) {
opcode
=
self
->
trace
[
pc
].
opcode
;
oparg
=
self
->
trace
[
pc
].
oparg
;
operand
=
self
->
trace
[
pc
].
operand
;
DPRINTF
(
3
,
"%4d: uop %s, oparg %d, operand %"
PRIu64
", stack_level %d\n"
,
pc
,
opcode
<
256
?
_PyOpcode_OpName
[
opcode
] :
_PyOpcode_uop_name
[
opcode
],
oparg
,
operand
,
(
int
)(
stack_pointer
-
_PyFrame_Stackbase
(
frame
)));
pc
++
;
OBJECT_STAT_INC
(
optimization_uops_executed
);
switch
(
opcode
) {
#include
"executor_cases.c.h"
default
:
{
fprintf
(
stderr
,
"Unknown uop %d, operand %"
PRIu64
"\n"
,
opcode
,
operand
);
Py_FatalError
(
"Unknown uop"
);
}
}
}
unbound_local_error
:
_PyEval_FormatExcCheckArg
(
tstate
,
PyExc_UnboundLocalError
,
UNBOUNDLOCAL_ERROR_MSG
,
PyTuple_GetItem
(
_PyFrame_GetCode
(
frame
)
->
co_localsplusnames
,
oparg
)
);
goto
error
;
pop_4_error
:
STACK_SHRINK
(
1
);
pop_3_error
:
STACK_SHRINK
(
1
);
pop_2_error
:
STACK_SHRINK
(
1
);
pop_1_error
:
STACK_SHRINK
(
1
);
error
:
// On ERROR_IF we return NULL as the frame.
// The caller recovers the frame from tstate->current_frame.
DPRINTF
(
2
,
"Error: [Opcode %d, operand %"
PRIu64
"]\n"
,
opcode
,
operand
);
_PyFrame_SetStackPointer
(
frame
,
stack_pointer
);
Py_DECREF
(
self
);
return
NULL
;
deoptimize
:
// On DEOPT_IF we just repeat the last instruction.
// This presumes nothing was popped from the stack (nor pushed).
DPRINTF
(
2
,
"DEOPT: [Opcode %d, operand %"
PRIu64
"]\n"
,
opcode
,
operand
);
frame
->
prev_instr
--
;
// Back up to just before destination
_PyFrame_SetStackPointer
(
frame
,
stack_pointer
);
Py_DECREF
(
self
);
return
frame
;
}
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