237 lines
11 KiB
C
237 lines
11 KiB
C
/* Definitions for bytecode */
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#ifndef Py_LIMITED_API
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#ifndef Py_CODE_H
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#define Py_CODE_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Each instruction in a code object is a fixed-width value,
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* currently 2 bytes: 1-byte opcode + 1-byte oparg. The EXTENDED_ARG
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* opcode allows for larger values but the current limit is 3 uses
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* of EXTENDED_ARG (see Python/compile.c), for a maximum
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* 32-bit value. This aligns with the note in Python/compile.c
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* (compiler_addop_i_line) indicating that the max oparg value is
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* 2**32 - 1, rather than INT_MAX.
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*/
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typedef uint16_t _Py_CODEUNIT;
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#ifdef WORDS_BIGENDIAN
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# define _Py_OPCODE(word) ((word) >> 8)
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# define _Py_OPARG(word) ((word) & 255)
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# define _Py_MAKECODEUNIT(opcode, oparg) (((opcode)<<8)|(oparg))
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#else
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# define _Py_OPCODE(word) ((word) & 255)
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# define _Py_OPARG(word) ((word) >> 8)
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# define _Py_MAKECODEUNIT(opcode, oparg) ((opcode)|((oparg)<<8))
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#endif
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// Use "unsigned char" instead of "uint8_t" here to avoid illegal aliasing:
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#define _Py_SET_OPCODE(word, opcode) (((unsigned char *)&(word))[0] = (opcode))
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// To avoid repeating ourselves in deepfreeze.py, all PyCodeObject members are
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// defined in this macro:
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#define _PyCode_DEF(SIZE) { \
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PyObject_VAR_HEAD \
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\
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/* Note only the following fields are used in hash and/or comparisons \
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* \
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* - co_name \
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* - co_argcount \
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* - co_posonlyargcount \
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* - co_kwonlyargcount \
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* - co_nlocals \
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* - co_stacksize \
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* - co_flags \
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* - co_firstlineno \
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* - co_consts \
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* - co_names \
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* - co_localsplusnames \
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* This is done to preserve the name and line number for tracebacks \
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* and debuggers; otherwise, constant de-duplication would collapse \
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* identical functions/lambdas defined on different lines. \
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*/ \
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\
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/* These fields are set with provided values on new code objects. */ \
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\
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/* The hottest fields (in the eval loop) are grouped here at the top. */ \
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PyObject *co_consts; /* list (constants used) */ \
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PyObject *co_names; /* list of strings (names used) */ \
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PyObject *co_exceptiontable; /* Byte string encoding exception handling \
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table */ \
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int co_flags; /* CO_..., see below */ \
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short co_warmup; /* Warmup counter for quickening */ \
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short _co_linearray_entry_size; /* Size of each entry in _co_linearray */ \
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\
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/* The rest are not so impactful on performance. */ \
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int co_argcount; /* #arguments, except *args */ \
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int co_posonlyargcount; /* #positional only arguments */ \
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int co_kwonlyargcount; /* #keyword only arguments */ \
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int co_stacksize; /* #entries needed for evaluation stack */ \
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int co_firstlineno; /* first source line number */ \
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\
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/* redundant values (derived from co_localsplusnames and \
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co_localspluskinds) */ \
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int co_nlocalsplus; /* number of local + cell + free variables \
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*/ \
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int co_nlocals; /* number of local variables */ \
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int co_nplaincellvars; /* number of non-arg cell variables */ \
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int co_ncellvars; /* total number of cell variables */ \
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int co_nfreevars; /* number of free variables */ \
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\
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PyObject *co_localsplusnames; /* tuple mapping offsets to names */ \
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PyObject *co_localspluskinds; /* Bytes mapping to local kinds (one byte \
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per variable) */ \
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PyObject *co_filename; /* unicode (where it was loaded from) */ \
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PyObject *co_name; /* unicode (name, for reference) */ \
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PyObject *co_qualname; /* unicode (qualname, for reference) */ \
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PyObject *co_linetable; /* bytes object that holds location info */ \
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PyObject *co_weakreflist; /* to support weakrefs to code objects */ \
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PyObject *_co_code; /* cached co_code object/attribute */ \
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char *_co_linearray; /* array of line offsets */ \
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int _co_firsttraceable; /* index of first traceable instruction */ \
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/* Scratch space for extra data relating to the code object. \
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Type is a void* to keep the format private in codeobject.c to force \
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people to go through the proper APIs. */ \
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void *co_extra; \
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char co_code_adaptive[(SIZE)]; \
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}
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/* Bytecode object */
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struct PyCodeObject _PyCode_DEF(1);
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/* Masks for co_flags above */
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#define CO_OPTIMIZED 0x0001
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#define CO_NEWLOCALS 0x0002
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#define CO_VARARGS 0x0004
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#define CO_VARKEYWORDS 0x0008
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#define CO_NESTED 0x0010
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#define CO_GENERATOR 0x0020
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/* The CO_COROUTINE flag is set for coroutine functions (defined with
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``async def`` keywords) */
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#define CO_COROUTINE 0x0080
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#define CO_ITERABLE_COROUTINE 0x0100
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#define CO_ASYNC_GENERATOR 0x0200
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/* bpo-39562: These constant values are changed in Python 3.9
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to prevent collision with compiler flags. CO_FUTURE_ and PyCF_
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constants must be kept unique. PyCF_ constants can use bits from
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0x0100 to 0x10000. CO_FUTURE_ constants use bits starting at 0x20000. */
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#define CO_FUTURE_DIVISION 0x20000
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#define CO_FUTURE_ABSOLUTE_IMPORT 0x40000 /* do absolute imports by default */
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#define CO_FUTURE_WITH_STATEMENT 0x80000
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#define CO_FUTURE_PRINT_FUNCTION 0x100000
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#define CO_FUTURE_UNICODE_LITERALS 0x200000
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#define CO_FUTURE_BARRY_AS_BDFL 0x400000
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#define CO_FUTURE_GENERATOR_STOP 0x800000
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#define CO_FUTURE_ANNOTATIONS 0x1000000
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/* This should be defined if a future statement modifies the syntax.
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For example, when a keyword is added.
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*/
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#define PY_PARSER_REQUIRES_FUTURE_KEYWORD
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#define CO_MAXBLOCKS 20 /* Max static block nesting within a function */
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PyAPI_DATA(PyTypeObject) PyCode_Type;
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#define PyCode_Check(op) Py_IS_TYPE(op, &PyCode_Type)
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#define PyCode_GetNumFree(op) ((op)->co_nfreevars)
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#define _PyCode_CODE(CO) ((_Py_CODEUNIT *)(CO)->co_code_adaptive)
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#define _PyCode_NBYTES(CO) (Py_SIZE(CO) * (Py_ssize_t)sizeof(_Py_CODEUNIT))
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/* Public interface */
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PyAPI_FUNC(PyCodeObject *) PyCode_New(
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int, int, int, int, int, PyObject *, PyObject *,
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PyObject *, PyObject *, PyObject *, PyObject *,
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PyObject *, PyObject *, PyObject *, int, PyObject *,
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PyObject *);
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PyAPI_FUNC(PyCodeObject *) PyCode_NewWithPosOnlyArgs(
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int, int, int, int, int, int, PyObject *, PyObject *,
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PyObject *, PyObject *, PyObject *, PyObject *,
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PyObject *, PyObject *, PyObject *, int, PyObject *,
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PyObject *);
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/* same as struct above */
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/* Creates a new empty code object with the specified source location. */
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PyAPI_FUNC(PyCodeObject *)
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PyCode_NewEmpty(const char *filename, const char *funcname, int firstlineno);
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/* Return the line number associated with the specified bytecode index
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in this code object. If you just need the line number of a frame,
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use PyFrame_GetLineNumber() instead. */
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PyAPI_FUNC(int) PyCode_Addr2Line(PyCodeObject *, int);
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PyAPI_FUNC(int) PyCode_Addr2Location(PyCodeObject *, int, int *, int *, int *, int *);
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/* for internal use only */
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struct _opaque {
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int computed_line;
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const uint8_t *lo_next;
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const uint8_t *limit;
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};
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typedef struct _line_offsets {
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int ar_start;
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int ar_end;
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int ar_line;
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struct _opaque opaque;
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} PyCodeAddressRange;
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/* Update *bounds to describe the first and one-past-the-last instructions in the
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same line as lasti. Return the number of that line.
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*/
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PyAPI_FUNC(int) _PyCode_CheckLineNumber(int lasti, PyCodeAddressRange *bounds);
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/* Create a comparable key used to compare constants taking in account the
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* object type. It is used to make sure types are not coerced (e.g., float and
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* complex) _and_ to distinguish 0.0 from -0.0 e.g. on IEEE platforms
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*
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* Return (type(obj), obj, ...): a tuple with variable size (at least 2 items)
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* depending on the type and the value. The type is the first item to not
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* compare bytes and str which can raise a BytesWarning exception. */
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PyAPI_FUNC(PyObject*) _PyCode_ConstantKey(PyObject *obj);
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PyAPI_FUNC(PyObject*) PyCode_Optimize(PyObject *code, PyObject* consts,
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PyObject *names, PyObject *lnotab);
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PyAPI_FUNC(int) _PyCode_GetExtra(PyObject *code, Py_ssize_t index,
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void **extra);
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PyAPI_FUNC(int) _PyCode_SetExtra(PyObject *code, Py_ssize_t index,
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void *extra);
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/* Equivalent to getattr(code, 'co_code') in Python.
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Returns a strong reference to a bytes object. */
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PyAPI_FUNC(PyObject *) PyCode_GetCode(PyCodeObject *code);
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/* Equivalent to getattr(code, 'co_varnames') in Python. */
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PyAPI_FUNC(PyObject *) PyCode_GetVarnames(PyCodeObject *code);
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/* Equivalent to getattr(code, 'co_cellvars') in Python. */
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PyAPI_FUNC(PyObject *) PyCode_GetCellvars(PyCodeObject *code);
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/* Equivalent to getattr(code, 'co_freevars') in Python. */
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PyAPI_FUNC(PyObject *) PyCode_GetFreevars(PyCodeObject *code);
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typedef enum _PyCodeLocationInfoKind {
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/* short forms are 0 to 9 */
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PY_CODE_LOCATION_INFO_SHORT0 = 0,
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/* one lineforms are 10 to 12 */
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PY_CODE_LOCATION_INFO_ONE_LINE0 = 10,
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PY_CODE_LOCATION_INFO_ONE_LINE1 = 11,
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PY_CODE_LOCATION_INFO_ONE_LINE2 = 12,
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PY_CODE_LOCATION_INFO_NO_COLUMNS = 13,
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PY_CODE_LOCATION_INFO_LONG = 14,
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PY_CODE_LOCATION_INFO_NONE = 15
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} _PyCodeLocationInfoKind;
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#ifdef __cplusplus
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}
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#endif
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#endif // !Py_CODE_H
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#endif // !Py_LIMITED_API
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