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/* Definitions for bytecode */
#ifndef Py_LIMITED_API
#ifndef Py_CODE_H
#define Py_CODE_H
#ifdef __cplusplus
extern "C" {
#endif
/* Count of all local monitoring events */
#define _PY_MONITORING_LOCAL_EVENTS 10
/* Count of all "real" monitoring events (not derived from other events) */
#define _PY_MONITORING_UNGROUPED_EVENTS 15
/* Count of all monitoring events */
#define _PY_MONITORING_EVENTS 17
/* Tables of which tools are active for each monitored event. */
/* For 3.12 ABI compatibility this is over sized */
typedef struct _Py_LocalMonitors {
/* Only _PY_MONITORING_LOCAL_EVENTS of these are used */
uint8_t tools[_PY_MONITORING_UNGROUPED_EVENTS];
} _Py_LocalMonitors;
typedef struct _Py_GlobalMonitors {
uint8_t tools[_PY_MONITORING_UNGROUPED_EVENTS];
} _Py_GlobalMonitors;
/* Each instruction in a code object is a fixed-width value,
* currently 2 bytes: 1-byte opcode + 1-byte oparg. The EXTENDED_ARG
* opcode allows for larger values but the current limit is 3 uses
* of EXTENDED_ARG (see Python/compile.c), for a maximum
* 32-bit value. This aligns with the note in Python/compile.c
* (compiler_addop_i_line) indicating that the max oparg value is
* 2**32 - 1, rather than INT_MAX.
*/
typedef union {
uint16_t cache;
struct {
uint8_t code;
uint8_t arg;
} op;
} _Py_CODEUNIT;
/* These macros only remain defined for compatibility. */
#define _Py_OPCODE(word) ((word).op.code)
#define _Py_OPARG(word) ((word).op.arg)
static inline _Py_CODEUNIT
_py_make_codeunit(uint8_t opcode, uint8_t oparg)
{
// No designated initialisers because of C++ compat
_Py_CODEUNIT word;
word.op.code = opcode;
word.op.arg = oparg;
return word;
}
static inline void
_py_set_opcode(_Py_CODEUNIT *word, uint8_t opcode)
{
word->op.code = opcode;
}
#define _Py_MAKE_CODEUNIT(opcode, oparg) _py_make_codeunit((opcode), (oparg))
#define _Py_SET_OPCODE(word, opcode) _py_set_opcode(&(word), (opcode))
typedef struct {
PyObject *_co_code;
PyObject *_co_varnames;
PyObject *_co_cellvars;
PyObject *_co_freevars;
} _PyCoCached;
/* Ancillary data structure used for instrumentation.
Line instrumentation creates an array of
these. One entry per code unit.*/
typedef struct {
uint8_t original_opcode;
int8_t line_delta;
} _PyCoLineInstrumentationData;
/* Main data structure used for instrumentation.
* This is allocated when needed for instrumentation
*/
typedef struct {
/* Monitoring specific to this code object */
_Py_LocalMonitors local_monitors;
/* Monitoring that is active on this code object */
_Py_LocalMonitors active_monitors;
/* The tools that are to be notified for events for the matching code unit */
uint8_t *tools;
/* Information to support line events */
_PyCoLineInstrumentationData *lines;
/* The tools that are to be notified for line events for the matching code unit */
uint8_t *line_tools;
/* Information to support instruction events */
/* The underlying instructions, which can themselves be instrumented */
uint8_t *per_instruction_opcodes;
/* The tools that are to be notified for instruction events for the matching code unit */
uint8_t *per_instruction_tools;
} _PyCoMonitoringData;
// To avoid repeating ourselves in deepfreeze.py, all PyCodeObject members are
// defined in this macro:
#define _PyCode_DEF(SIZE) { \
PyObject_VAR_HEAD \
\
/* Note only the following fields are used in hash and/or comparisons \
* \
* - co_name \
* - co_argcount \
* - co_posonlyargcount \
* - co_kwonlyargcount \
* - co_nlocals \
* - co_stacksize \
* - co_flags \
* - co_firstlineno \
* - co_consts \
* - co_names \
* - co_localsplusnames \
* This is done to preserve the name and line number for tracebacks \
* and debuggers; otherwise, constant de-duplication would collapse \
* identical functions/lambdas defined on different lines. \
*/ \
\
/* These fields are set with provided values on new code objects. */ \
\
/* The hottest fields (in the eval loop) are grouped here at the top. */ \
PyObject *co_consts; /* list (constants used) */ \
PyObject *co_names; /* list of strings (names used) */ \
PyObject *co_exceptiontable; /* Byte string encoding exception handling \
table */ \
int co_flags; /* CO_..., see below */ \
\
/* The rest are not so impactful on performance. */ \
int co_argcount; /* #arguments, except *args */ \
int co_posonlyargcount; /* #positional only arguments */ \
int co_kwonlyargcount; /* #keyword only arguments */ \
int co_stacksize; /* #entries needed for evaluation stack */ \
int co_firstlineno; /* first source line number */ \
\
/* redundant values (derived from co_localsplusnames and \
co_localspluskinds) */ \
int co_nlocalsplus; /* number of local + cell + free variables */ \
int co_framesize; /* Size of frame in words */ \
int co_nlocals; /* number of local variables */ \
int co_ncellvars; /* total number of cell variables */ \
int co_nfreevars; /* number of free variables */ \
uint32_t co_version; /* version number */ \
\
PyObject *co_localsplusnames; /* tuple mapping offsets to names */ \
PyObject *co_localspluskinds; /* Bytes mapping to local kinds (one byte \
per variable) */ \
PyObject *co_filename; /* unicode (where it was loaded from) */ \
PyObject *co_name; /* unicode (name, for reference) */ \
PyObject *co_qualname; /* unicode (qualname, for reference) */ \
PyObject *co_linetable; /* bytes object that holds location info */ \
PyObject *co_weakreflist; /* to support weakrefs to code objects */ \
_PyCoCached *_co_cached; /* cached co_* attributes */ \
uint64_t _co_instrumentation_version; /* current instrumentation version */ \
_PyCoMonitoringData *_co_monitoring; /* Monitoring data */ \
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. */ \
void *co_extra; \
char co_code_adaptive[(SIZE)]; \
}
/* Bytecode object */
struct PyCodeObject _PyCode_DEF(1);
/* Masks for co_flags above */
#define CO_OPTIMIZED 0x0001
#define CO_NEWLOCALS 0x0002
#define CO_VARARGS 0x0004
#define CO_VARKEYWORDS 0x0008
#define CO_NESTED 0x0010
#define CO_GENERATOR 0x0020
/* The CO_COROUTINE flag is set for coroutine functions (defined with
``async def`` keywords) */
#define CO_COROUTINE 0x0080
#define CO_ITERABLE_COROUTINE 0x0100
#define CO_ASYNC_GENERATOR 0x0200
/* bpo-39562: These constant values are changed in Python 3.9
to prevent collision with compiler flags. CO_FUTURE_ and PyCF_
constants must be kept unique. PyCF_ constants can use bits from
0x0100 to 0x10000. CO_FUTURE_ constants use bits starting at 0x20000. */
#define CO_FUTURE_DIVISION 0x20000
#define CO_FUTURE_ABSOLUTE_IMPORT 0x40000 /* do absolute imports by default */
#define CO_FUTURE_WITH_STATEMENT 0x80000
#define CO_FUTURE_PRINT_FUNCTION 0x100000
#define CO_FUTURE_UNICODE_LITERALS 0x200000
#define CO_FUTURE_BARRY_AS_BDFL 0x400000
#define CO_FUTURE_GENERATOR_STOP 0x800000
#define CO_FUTURE_ANNOTATIONS 0x1000000
/* This should be defined if a future statement modifies the syntax.
For example, when a keyword is added.
*/
#define PY_PARSER_REQUIRES_FUTURE_KEYWORD
#define CO_MAXBLOCKS 21 /* Max static block nesting within a function */
PyAPI_DATA(PyTypeObject) PyCode_Type;
#define PyCode_Check(op) Py_IS_TYPE((op), &PyCode_Type)
static inline Py_ssize_t PyCode_GetNumFree(PyCodeObject *op) {
assert(PyCode_Check(op));
return op->co_nfreevars;
}
static inline int PyCode_GetFirstFree(PyCodeObject *op) {
assert(PyCode_Check(op));
return op->co_nlocalsplus - op->co_nfreevars;
}
#define _PyCode_CODE(CO) _Py_RVALUE((_Py_CODEUNIT *)(CO)->co_code_adaptive)
#define _PyCode_NBYTES(CO) (Py_SIZE(CO) * (Py_ssize_t)sizeof(_Py_CODEUNIT))
/* Unstable public interface */
PyAPI_FUNC(PyCodeObject *) PyUnstable_Code_New(
int, int, int, int, int, PyObject *, PyObject *,
PyObject *, PyObject *, PyObject *, PyObject *,
PyObject *, PyObject *, PyObject *, int, PyObject *,
PyObject *);
PyAPI_FUNC(PyCodeObject *) PyUnstable_Code_NewWithPosOnlyArgs(
int, int, int, int, int, int, PyObject *, PyObject *,
PyObject *, PyObject *, PyObject *, PyObject *,
PyObject *, PyObject *, PyObject *, int, PyObject *,
PyObject *);
/* same as struct above */
// Old names -- remove when this API changes:
_Py_DEPRECATED_EXTERNALLY(3.12) static inline PyCodeObject *
PyCode_New(
int a, int b, int c, int d, int e, PyObject *f, PyObject *g,
PyObject *h, PyObject *i, PyObject *j, PyObject *k,
PyObject *l, PyObject *m, PyObject *n, int o, PyObject *p,
PyObject *q)
{
return PyUnstable_Code_New(
a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q);
}
_Py_DEPRECATED_EXTERNALLY(3.12) static inline PyCodeObject *
PyCode_NewWithPosOnlyArgs(
int a, int poac, int b, int c, int d, int e, PyObject *f, PyObject *g,
PyObject *h, PyObject *i, PyObject *j, PyObject *k,
PyObject *l, PyObject *m, PyObject *n, int o, PyObject *p,
PyObject *q)
{
return PyUnstable_Code_NewWithPosOnlyArgs(
a, poac, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q);
}
/* Creates a new empty code object with the specified source location. */
PyAPI_FUNC(PyCodeObject *)
PyCode_NewEmpty(const char *filename, const char *funcname, int firstlineno);
/* Return the line number associated with the specified bytecode index
in this code object. If you just need the line number of a frame,
use PyFrame_GetLineNumber() instead. */
PyAPI_FUNC(int) PyCode_Addr2Line(PyCodeObject *, int);
PyAPI_FUNC(int) PyCode_Addr2Location(PyCodeObject *, int, int *, int *, int *, int *);
#define PY_FOREACH_CODE_EVENT(V) \
V(CREATE) \
V(DESTROY)
typedef enum {
#define PY_DEF_EVENT(op) PY_CODE_EVENT_##op,
PY_FOREACH_CODE_EVENT(PY_DEF_EVENT)
#undef PY_DEF_EVENT
} PyCodeEvent;
/*
* A callback that is invoked for different events in a code object's lifecycle.
*
* The callback is invoked with a borrowed reference to co, after it is
* created and before it is destroyed.
*
* If the callback sets an exception, it must return -1. Otherwise
* it should return 0.
*/
typedef int (*PyCode_WatchCallback)(
PyCodeEvent event,
PyCodeObject* co);
/*
* Register a per-interpreter callback that will be invoked for code object
* lifecycle events.
*
* Returns a handle that may be passed to PyCode_ClearWatcher on success,
* or -1 and sets an error if no more handles are available.
*/
PyAPI_FUNC(int) PyCode_AddWatcher(PyCode_WatchCallback callback);
/*
* Clear the watcher associated with the watcher_id handle.
*
* Returns 0 on success or -1 if no watcher exists for the provided id.
*/
PyAPI_FUNC(int) PyCode_ClearWatcher(int watcher_id);
/* for internal use only */
struct _opaque {
int computed_line;
const uint8_t *lo_next;
const uint8_t *limit;
};
typedef struct _line_offsets {
int ar_start;
int ar_end;
int ar_line;
struct _opaque opaque;
} PyCodeAddressRange;
/* Update *bounds to describe the first and one-past-the-last instructions in the
same line as lasti. Return the number of that line.
*/
PyAPI_FUNC(int) _PyCode_CheckLineNumber(int lasti, PyCodeAddressRange *bounds);
/* Create a comparable key used to compare constants taking in account the
* object type. It is used to make sure types are not coerced (e.g., float and
* complex) _and_ to distinguish 0.0 from -0.0 e.g. on IEEE platforms
*
* Return (type(obj), obj, ...): a tuple with variable size (at least 2 items)
* depending on the type and the value. The type is the first item to not
* compare bytes and str which can raise a BytesWarning exception. */
PyAPI_FUNC(PyObject*) _PyCode_ConstantKey(PyObject *obj);
PyAPI_FUNC(PyObject*) PyCode_Optimize(PyObject *code, PyObject* consts,
PyObject *names, PyObject *lnotab);
PyAPI_FUNC(int) PyUnstable_Code_GetExtra(
PyObject *code, Py_ssize_t index, void **extra);
PyAPI_FUNC(int) PyUnstable_Code_SetExtra(
PyObject *code, Py_ssize_t index, void *extra);
// Old names -- remove when this API changes:
_Py_DEPRECATED_EXTERNALLY(3.12) static inline int
_PyCode_GetExtra(PyObject *code, Py_ssize_t index, void **extra)
{
return PyUnstable_Code_GetExtra(code, index, extra);
}
_Py_DEPRECATED_EXTERNALLY(3.12) static inline int
_PyCode_SetExtra(PyObject *code, Py_ssize_t index, void *extra)
{
return PyUnstable_Code_SetExtra(code, index, extra);
}
/* Equivalent to getattr(code, 'co_code') in Python.
Returns a strong reference to a bytes object. */
PyAPI_FUNC(PyObject *) PyCode_GetCode(PyCodeObject *code);
/* Equivalent to getattr(code, 'co_varnames') in Python. */
PyAPI_FUNC(PyObject *) PyCode_GetVarnames(PyCodeObject *code);
/* Equivalent to getattr(code, 'co_cellvars') in Python. */
PyAPI_FUNC(PyObject *) PyCode_GetCellvars(PyCodeObject *code);
/* Equivalent to getattr(code, 'co_freevars') in Python. */
PyAPI_FUNC(PyObject *) PyCode_GetFreevars(PyCodeObject *code);
typedef enum _PyCodeLocationInfoKind {
/* short forms are 0 to 9 */
PY_CODE_LOCATION_INFO_SHORT0 = 0,
/* one lineforms are 10 to 12 */
PY_CODE_LOCATION_INFO_ONE_LINE0 = 10,
PY_CODE_LOCATION_INFO_ONE_LINE1 = 11,
PY_CODE_LOCATION_INFO_ONE_LINE2 = 12,
PY_CODE_LOCATION_INFO_NO_COLUMNS = 13,
PY_CODE_LOCATION_INFO_LONG = 14,
PY_CODE_LOCATION_INFO_NONE = 15
} _PyCodeLocationInfoKind;
#ifdef __cplusplus
}
#endif
#endif // !Py_CODE_H
#endif // !Py_LIMITED_API
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