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Fix crashes on user-created AST subclasses
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Demonstration:
>>> ast.FunctionDef.__annotations__
{'name': <class 'str'>, 'args': <class 'ast.arguments'>, 'body': list[ast.stmt], 'decorator_list': list[ast.expr], 'returns': ast.expr | None, 'type_comment': str | None, 'type_params': list[ast.type_param]}
>>> ast.FunctionDef()
<stdin>:1: DeprecationWarning: FunctionDef.__init__ missing 1 required positional argument: 'name'. This will become an error in Python 3.15.
<stdin>:1: DeprecationWarning: FunctionDef.__init__ missing 1 required positional argument: 'args'. This will become an error in Python 3.15.
<ast.FunctionDef object at 0x101959460>
>>> node = ast.FunctionDef(name="foo", args=ast.arguments())
>>> node.decorator_list
[]
>>> ast.FunctionDef(whatever="you want", name="x", args=ast.arguments())
<stdin>:1: DeprecationWarning: FunctionDef.__init__ got an unexpected keyword argument 'whatever'. Support for arbitrary keyword arguments is deprecated and will be removed in Python 3.15.
<ast.FunctionDef object at 0x1019581f0>
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PyAST_mod2obj call. (GH-113035)
Co-authored-by: Gregory P. Smith [Google LLC] <greg@krypto.org>
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* gh-106905: avoid incorrect SystemError about recursion depth mismatch
* Update Misc/NEWS.d/next/Core and Builtins/2023-07-20-11-41-16.gh-issue-106905.AyZpuB.rst
---------
Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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Symbols of the C API should be prefixed by "Py_" to avoid conflict
with existing names in 3rd party C extensions on "#include <Python.h>".
test.pythoninfo now logs Py_C_RECURSION_LIMIT constant and other
_testcapi and _testinternalcapi constants.
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* Update Parser/asdl_c.py to regenerate Python/Python-ast.c.
* Remove _PyLong_AsInt() alias to PyLong_AsInt().
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`_PyEval_EvalFrameDefault()` (GH-107535)
* Set C recursion limit to 1500, set cost of eval loop to 2 frames, and compiler mutliply to 2.
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* Remove '#include "structmember.h"'.
* If needed, add <stddef.h> to get offsetof() function.
* Update Parser/asdl_c.py to regenerate Python/Python-ast.c.
* Replace:
* T_SHORT => Py_T_SHORT
* T_INT => Py_T_INT
* T_LONG => Py_T_LONG
* T_FLOAT => Py_T_FLOAT
* T_DOUBLE => Py_T_DOUBLE
* T_STRING => Py_T_STRING
* T_OBJECT => _Py_T_OBJECT
* T_CHAR => Py_T_CHAR
* T_BYTE => Py_T_BYTE
* T_UBYTE => Py_T_UBYTE
* T_USHORT => Py_T_USHORT
* T_UINT => Py_T_UINT
* T_ULONG => Py_T_ULONG
* T_STRING_INPLACE => Py_T_STRING_INPLACE
* T_BOOL => Py_T_BOOL
* T_OBJECT_EX => Py_T_OBJECT_EX
* T_LONGLONG => Py_T_LONGLONG
* T_ULONGLONG => Py_T_ULONGLONG
* T_PYSSIZET => Py_T_PYSSIZET
* T_NONE => _Py_T_NONE
* READONLY => Py_READONLY
* PY_AUDIT_READ => Py_AUDIT_READ
* READ_RESTRICTED => Py_AUDIT_READ
* PY_WRITE_RESTRICTED => _Py_WRITE_RESTRICTED
* RESTRICTED => (READ_RESTRICTED | _Py_WRITE_RESTRICTED)
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(#106224)
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Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
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Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
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This implements PEP 695, Type Parameter Syntax. It adds support for:
- Generic functions (def func[T](): ...)
- Generic classes (class X[T](): ...)
- Type aliases (type X = ...)
- New scoping when the new syntax is used within a class body
- Compiler and interpreter changes to support the new syntax and scoping rules
Co-authored-by: Marc Mueller <30130371+cdce8p@users.noreply.github.com>
Co-authored-by: Eric Traut <eric@traut.com>
Co-authored-by: Larry Hastings <larry@hastings.org>
Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
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Here we are doing no more than adding the value for Py_mod_multiple_interpreters and using it for stdlib modules. We will start checking for it in gh-104206 (once PyInterpreterState.ceval.own_gil is added in gh-104204).
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https://github.com/python/cpython/issues/100227
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Replace Py_INCREF() and Py_XINCREF() with Py_NewRef() and
Py_XNewRef() in Python/Python-ast.c.
Update Parser/asdl_c.py to regenerate code.
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This moves nearly all remaining object-holding globals in core code (other than static types).
https://github.com/python/cpython/issues/81057
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Replace Py_INCREF() and Py_XINCREF() with Py_NewRef() and
Py_XNewRef() in C files of the Python/ directory.
Update Parser/asdl_c.py to regenerate Python/Python-ast.c.
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(GH-96510)
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Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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compiled (GH-93359)
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Currently, calling Py_EnterRecursiveCall() and
Py_LeaveRecursiveCall() may use a function call or a static inline
function call, depending if the internal pycore_ceval.h header file
is included or not. Use a different name for the static inline
function to ensure that the static inline function is always used in
Python internals for best performance. Similar approach than
PyThreadState_GET() (function call) and _PyThreadState_GET() (static
inline function).
* Rename _Py_EnterRecursiveCall() to _Py_EnterRecursiveCallTstate()
* Rename _Py_LeaveRecursiveCall() to _Py_LeaveRecursiveCallTstate()
* pycore_ceval.h: Rename Py_EnterRecursiveCall() to
_Py_EnterRecursiveCall() and Py_LeaveRecursiveCall() and
_Py_LeaveRecursiveCall()
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Automerge-Triggered-By: GH:isidentical
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When compiling an AST object with a direct / indirect reference
cycles, on the conversion phase because of exceeding amount of
calls, a segfault was raised. This patch adds recursion guards to
places for preventing user inputs to not to crash AST but instead
raise a RecursionError.
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Co-authored-by: Brandt Bucher <brandtbucher@gmail.com>
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* Add source location attributes to alias.
* Move alias star construction to pegen helper.
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
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Rename AST functions of pycore_ast.h to use the "_PyAST_" prefix.
Remove macros creating aliases without prefix. For example, Module()
becomes _PyAST_Module(). Update Grammar/python.gram to use
_PyAST_xxx() functions.
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* pycore_ast.h no longer defines the Yield macro.
* Fix a compiler warning on Windows: "warning C4005: 'Yield': macro
redefinition".
* Python-ast.c now defines directly functions with their real
_Py_xxx() name, rather than xxx().
* Remove "#undef Yield" in C files including pycore_ast.h.
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Remove the pyarena.h header file with functions:
* PyArena_New()
* PyArena_Free()
* PyArena_Malloc()
* PyArena_AddPyObject()
These functions were undocumented, excluded from the limited C API,
and were only used internally by the compiler.
Add pycore_pyarena.h header. Rename functions:
* PyArena_New() => _PyArena_New()
* PyArena_Free() => _PyArena_Free()
* PyArena_Malloc() => _PyArena_Malloc()
* PyArena_AddPyObject() => _PyArena_AddPyObject()
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These functions were undocumented and excluded from the limited C
API.
Most names defined by these header files were not prefixed by "Py"
and so could create names conflicts. For example, Python-ast.h
defined a "Yield" macro which was conflict with the "Yield" name used
by the Windows <winbase.h> header.
Use the Python ast module instead.
* Move Include/asdl.h to Include/internal/pycore_asdl.h.
* Move Include/Python-ast.h to Include/internal/pycore_ast.h.
* Remove ast.h header file.
* pycore_symtable.h no longer includes Python-ast.h.
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test_peg_generator now defines _Py_TEST_PEGEN macro when building C
code to not call PyAST_Validate() in Parser/pegen.c. Moreover, it
defines Py_BUILD_CORE_MODULE macro to get access to the internal
C API.
Remove "global_ast_state" from Python-ast.c when it's built by
test_peg_generator: always get the AST state from the current interpreter.
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Co-authored-by: Guido van Rossum <guido@python.org>
Co-authored-by: Talin <viridia@gmail.com>
Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
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Replace PyModule_AddObject() with PyModule_AddObjectRef() in the _ast
module (Python-ast.c).
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Call _PyAST_Fini() on all interpreters, not only on the main
interpreter. Also, call it ealier to fix a reference leak.
Python types contain a reference to themselves in in their
PyTypeObject.tp_mro member. _PyAST_Fini() must called before the last
GC collection to destroy AST types.
_PyInterpreterState_Clear() now calls _PyAST_Fini(). It now also
calls _PyWarnings_Fini() on subinterpeters, not only on the main
interpreter.
Add an assertion in AST init_types() to ensure that the _ast module
is no longer used after _PyAST_Fini() has been called.
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The ast module internal state is now per interpreter.
* Rename "astmodulestate" to "struct ast_state"
* Add pycore_ast.h internal header: the ast_state structure is now
declared in pycore_ast.h.
* Add PyInterpreterState.ast (struct ast_state)
* Remove get_ast_state()
* Rename get_global_ast_state() to get_ast_state()
* PyAST_obj2mod() now handles get_ast_state() failures
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* Add new capability to the PEG parser to type variable assignments. For instance:
```
| a[asdl_stmt_seq*]=';'.small_stmt+ [';'] NEWLINE { a }
```
* Add new sequence types from the asdl definition (automatically generated)
* Make `asdl_seq` type a generic aliasing pointer type.
* Create a new `asdl_generic_seq` for the generic case using `void*`.
* The old `asdl_seq_GET`/`ast_seq_SET` macros now are typed.
* New `asdl_seq_GET_UNTYPED`/`ast_seq_SET_UNTYPED` macros for dealing with generic sequences.
* Changes all possible `asdl_seq` types to use specific versions everywhere.
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Partially revert commit ac46eb4ad6662cf6d771b20d8963658b2186c48c:
"bpo-38113: Update the Python-ast.c generator to PEP384 (gh-15957)".
Using a module state per module instance is causing subtle practical
problems.
For example, the Mercurial project replaces the __import__() function
to implement lazy import, whereas Python expected that "import _ast"
always return a fully initialized _ast module.
Add _PyAST_Fini() to clear the state at exit.
The _ast module has no state (set _astmodule.m_size to 0). Remove
astmodule_traverse(), astmodule_clear() and astmodule_free()
functions.
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Convert the _ast extension module to PEP 489 "Multiphase
initialization". Replace the global _ast state with a module state.
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Fix a crash in the _ast module: it can no longer be loaded more than
once. It now uses a global state rather than a module state.
* Move _ast module state: use a global state instead.
* Set _astmodule.m_size to -1, so the extension cannot be loaded more
than once.
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Rework asdl_c.py to pass the module state to functions in
Python-ast.c, instead of using astmodulestate_global.
Handle also PyState_AddModule() failure in init_types().
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PyType_FromSpec types (reverts GH-19414) (GH-20264)
Heap types now always visit the type in tp_traverse. See added docs for details.
This reverts commit 0169d3003be3d072751dd14a5c84748ab63a249f.
Automerge-Triggered-By: @encukou
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