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* [3.10] gh-95778: CVE-2020-10735: Prevent DoS by very large int() (#96501)Gregory P. Smith2022-09-021-0/+2
| | | | | | | | | | | | | | | | | Integer to and from text conversions via CPython's bignum `int` type is not safe against denial of service attacks due to malicious input. Very large input strings with hundred thousands of digits can consume several CPU seconds. This PR comes fresh from a pile of work done in our private PSRT security response team repo. This backports https://github.com/python/cpython/pull/96499 aka 511ca9452033ef95bc7d7fc404b8161068226002 Signed-off-by: Christian Heimes [Red Hat] <christian@python.org> Tons-of-polishing-up-by: Gregory P. Smith [Google] <greg@krypto.org> Reviews via the private PSRT repo via many others (see the NEWS entry in the PR). <!-- gh-issue-number: gh-95778 --> * Issue: gh-95778 <!-- /gh-issue-number --> I wrote up [a one pager for the release managers](https://docs.google.com/document/d/1KjuF_aXlzPUxTK4BMgezGJ2Pn7uevfX7g0_mvgHlL7Y/edit#).
* [3.10] bpo-46006: Revert "bpo-40521: Per-interpreter interned strings ↵Victor Stinner2022-01-061-9/+3
| | | | | | | | | | | | | | | | | (GH-20085)" (GH-30422) (GH-30425) This reverts commit ea251806b8dffff11b30d2182af1e589caf88acf. Keep "assert(interned == NULL);" in _PyUnicode_Fini(), but only for the main interpreter. Keep _PyUnicode_ClearInterned() changes avoiding the creation of a temporary Python list object. Leave the PyInterpreterState structure unchanged to keep the ABI backward compatibility with Python 3.10.0: rename the "interned" member to "unused_interned". (cherry picked from commit 35d6540c904ef07b8602ff014e520603f84b5886)
* bpo-43977: Use tp_flags for collection matching (GH-25723)Mark Shannon2021-04-301-4/+0
| | | | | | | | | | | | | * Add Py_TPFLAGS_SEQUENCE and Py_TPFLAGS_MAPPING, add to all relevant standard builtin classes. * Set relevant flags on collections.abc.Sequence and Mapping. * Use flags in MATCH_SEQUENCE and MATCH_MAPPING opcodes. * Inherit Py_TPFLAGS_SEQUENCE and Py_TPFLAGS_MAPPING. * Add NEWS * Remove interpreter-state map_abc and seq_abc fields.
* bpo-43962: Fix _PyInterpreterState_IDIncref() (GH-25683)Victor Stinner2021-04-281-1/+1
| | | | _PyInterpreterState_IDIncref() now calls _PyInterpreterState_IDInitref() and always increments id_refcount.
* bpo-43760: Speed up check for tracing in interpreter dispatch (#25276)Mark Shannon2021-04-131-6/+0
| | | | | | | | | * Remove redundant tracing_possible field from interpreter state. * Move 'use_tracing' from tstate onto C stack, for fastest possible checking in dispatch logic. * Add comments stressing the importance stack discipline when dealing with CFrames. * Add NEWS
* Revert "bpo-40521: Make dtoa bigint free list per-interpreter (GH-24821)" ↵Victor Stinner2021-03-221-4/+0
| | | | | (GH-24964) This reverts commit 5bd1059184b154d339f1bd53d23c98b5bcf14c8c.
* bpo-43244: Rename pycore_ast.h to pycore_ast_state.h (GH-24907)Victor Stinner2021-03-171-1/+1
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* bpo-40521: Make dtoa bigint free list per-interpreter (GH-24821)junyixie2021-03-131-0/+4
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* bpo-42128: Structural Pattern Matching (PEP 634) (GH-22917)Brandt Bucher2021-02-261-1/+4
| | | | | Co-authored-by: Guido van Rossum <guido@python.org> Co-authored-by: Talin <viridia@gmail.com> Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
* bpo-40521: Per-interpreter interned strings (GH-20085)Victor Stinner2020-12-261-0/+11
| | | | | | | | | | | Make the Unicode dictionary of interned strings compatible with subinterpreters. Remove the INTERN_NAME_STRINGS macro in typeobject.c: names are always now interned (even if EXPERIMENTAL_ISOLATED_SUBINTERPRETERS macro is defined). _PyUnicode_ClearInterned() now uses PyDict_Next() to no longer allocate memory, to ensure that the interned dictionary is cleared.
* bpo-42745: Make the type cache per-interpreter (GH-23947)Victor Stinner2020-12-261-0/+22
| | | | | | | | | | | Make the type attribute lookup cache per-interpreter. Add private _PyType_InitCache() function, called by PyInterpreterState_New(). Continue to share next_version_tag between interpreters, since static types are still shared by interpreters. Remove MCACHE macro: the cache is no longer disabled if the EXPERIMENTAL_ISOLATED_SUBINTERPRETERS macro is defined.
* bpo-39465: Fix _PyUnicode_FromId() for subinterpreters (GH-20058)Victor Stinner2020-12-251-0/+7
| | | | | | | | | | | | | | | | | Make _PyUnicode_FromId() function compatible with subinterpreters. Each interpreter now has an array of identifier objects (interned strings decoded from UTF-8). * Add PyInterpreterState.unicode.identifiers: array of identifiers objects. * Add _PyRuntimeState.unicode_ids used to allocate unique indexes to _Py_Identifier. * Rewrite the _Py_Identifier structure. Microbenchmark on _PyUnicode_FromId(&PyId_a) with _Py_IDENTIFIER(a): [ref] 2.42 ns +- 0.00 ns -> [atomic] 3.39 ns +- 0.00 ns: 1.40x slower This change adds 1 ns per _PyUnicode_FromId() call in average.
* bpo-42639: Move atexit state to PyInterpreterState (GH-23763)Victor Stinner2020-12-151-3/+15
| | | | | | | | | * Add _PyAtExit_Call() function and remove pyexitfunc and pyexitmodule members of PyInterpreterState. The function logs atexit callback errors using _PyErr_WriteUnraisableMsg(). * Add _PyAtExit_Init() and _PyAtExit_Fini() functions. * Remove traverse, clear and free functions of the atexit module. Co-authored-by: Dong-hee Na <donghee.na@python.org>
* bpo-42639: atexit now logs callbacks exceptions (GH-23771)Victor Stinner2020-12-141-1/+1
| | | | | | | | | | | At Python exit, if a callback registered with atexit.register() fails, its exception is now logged. Previously, only some exceptions were logged, and the last exception was always silently ignored. Add _PyAtExit_Call() function and remove PyInterpreterState.atexit_func member. call_py_exitfuncs() now calls directly _PyAtExit_Call(). The atexit module must now always be built as a built-in module.
* bpo-42639: Cleanup atexitmodule.c (GH-23770)Victor Stinner2020-12-141-2/+2
| | | | | | | | | * Rename "atexitmodule_state" to "struct atexit_state". * Rename "modstate" to "state". * Rename "self" parameter to "module". * test_atexit uses textwrap.dedent(). * Remove _Py_PyAtExit() function: inline it into atexit_exec(). * PyInterpreterState: rename pyexitfunc to atexit_func, rename pyexitmodule to atexit_module.
* bpo-42260: Initialize time and warnings earlier at startup (GH-23249)Victor Stinner2020-11-121-1/+5
| | | | | | | | | | * Call _PyTime_Init() and _PyWarnings_InitState() earlier during the Python initialization. * Inline _PyImportHooks_Init() into _PySys_InitCore(). * The _warnings initialization function no longer call _PyWarnings_InitState() to prevent resetting filters_version to 0. * _PyWarnings_InitState() now returns an int and no longer clear the state in case of error (it's done anyway at Python exit). * Rework init_importlib(), fix refleaks on errors.
* bpo-42260: Add _PyInterpreterState_SetConfig() (GH-23158)Victor Stinner2020-11-041-6/+0
| | | | | | | | * Inline _PyInterpreterState_SetConfig(): replace it with _PyConfig_Copy(). * Add _PyErr_SetFromPyStatus() * Add _PyInterpreterState_GetConfigCopy() * Add a new _PyInterpreterState_SetConfig() function. * Add an unit which gets, modifies, and sets the config.
* bpo-41796: Make _ast module state per interpreter (GH-23024)Victor Stinner2020-11-021-4/+7
| | | | | | | | | | | 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
* bpo-42208: Call GC collect earlier in PyInterpreterState_Clear() (GH-23044)Victor Stinner2020-10-301-0/+1
| | | | | | | | The last GC collection is now done before clearing builtins and sys dictionaries. Add also assertions to ensure that gc.collect() is no longer called after _PyGC_Fini(). Pass also the tstate to PyInterpreterState_Clear() to pass the correct tstate to _PyGC_CollectNoFail() and _PyGC_Fini().
* bpo-42161: Add _PyLong_GetZero() and _PyLong_GetOne() (GH-22993)Victor Stinner2020-10-261-2/+5
| | | | | | Add _PyLong_GetZero() and _PyLong_GetOne() functions and a new internal pycore_long.h header file. Python cannot be built without small integer singletons anymore.
* bpo-40939: Remove even more references to the old parser (GH-21642)Lysandros Nikolaou2020-07-271-9/+0
| | | Automerge-Triggered-By: @lysnikolaou
* bpo-40521: Optimize PyBytes_FromStringAndSize(str, 0) (GH-21142)Victor Stinner2020-06-251-2/+2
| | | | | | | | | | | | | | | | Always create the empty bytes string singleton. Optimize PyBytes_FromStringAndSize(str, 0): it no longer has to check if the empty string singleton was created or not, it is always available. Add functions: * _PyBytes_Init() * bytes_get_empty(), bytes_new_empty() * bytes_create_empty_string_singleton() * unicode_create_empty_string_singleton() _Py_unicode_state: rename empty structure member to empty_string.
* bpo-40521: Make Unicode latin1 singletons per interpreter (GH-21101)Victor Stinner2020-06-241-0/+3
| | | | | | | | | Each interpreter now has its own Unicode latin1 singletons. Remove "ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS" and "ifdef LATIN1_SINGLETONS": always enable latin1 singletons. Optimize unicode_result_ready(): only attempt to get a latin1 singleton for PyUnicode_1BYTE_KIND.
* bpo-40521: Make empty Unicode string per interpreter (GH-21096)Victor Stinner2020-06-231-0/+2
| | | Each interpreter now has its own empty Unicode string singleton.
* bpo-40521: Make MemoryError free list per interpreter (GH-21086)Victor Stinner2020-06-231-0/+8
| | | | | | | Each interpreter now has its own MemoryError free list: it is not longer shared by all interpreters. Add _Py_exc_state structure and PyInterpreterState.exc_state member. Move also errnomap into _Py_exc_state.
* bpo-40521: Empty frozenset is no longer a singleton (GH-21085)Raymond Hettinger2020-06-231-2/+0
| | | | | | | | | * Revert "bpo-40521: Make the empty frozenset per interpreter (GH-21068)" This reverts commit 261cfedf7657a515e04428bba58eba2a9bb88208. * bpo-40521: Empty frozensets are no longer singletons * Complete the removal of the frozenset singleton
* bpo-40521: Make bytes singletons per interpreter (GH-21074)Victor Stinner2020-06-231-0/+6
| | | | | | Each interpreter now has its own empty bytes string and single byte character singletons. Replace STRINGLIB_EMPTY macro with STRINGLIB_GET_EMPTY() macro.
* bpo-40521: Make the empty frozenset per interpreter (GH-21068)Victor Stinner2020-06-231-0/+2
| | | Each interpreter now has its own empty frozenset singleton.
* bpo-40521: Make dict free lists per-interpreter (GH-20645)Victor Stinner2020-06-231-13/+24
| | | | | | | | | | | Each interpreter now has its own dict free list: * Move dict free lists into PyInterpreterState. * Move PyDict_MAXFREELIST define to pycore_interp.h * Add _Py_dict_state structure. * Add tstate parameter to _PyDict_ClearFreeList() and _PyDict_Fini(). * In debug mode, ensure that the dict free lists are not used after _PyDict_Fini() is called. * Remove "#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS".
* bpo-39465: Use _PyInterpreterState_GET() (GH-20788)Victor Stinner2020-06-101-7/+7
| | | | | | | | | | | | Replace _PyThreadState_GET() with _PyInterpreterState_GET() in: * get_small_int() * gcmodule.c: add also get_gc_state() function * _PyTrash_deposit_object() * _PyTrash_destroy_chain() * warnings_get_state() * Py_GetRecursionLimit() Cleanup listnode.c: add 'parser' variable.
* bpo-40521: Make context free list per-interpreter (GH-20644)Victor Stinner2020-06-051-0/+7
| | | | | | | | | Each interpreter now has its own context free list: * Move context free list into PyInterpreterState. * Add _Py_context_state structure. * Add tstate parameter to _PyContext_ClearFreeList() and _PyContext_Fini(). * Pass tstate to clear_freelists().
* bpo-40521: Make async gen free lists per-interpreter (GH-20643)Victor Stinner2020-06-051-0/+18
| | | | | | | | | Each interpreter now has its own asynchronous generator free lists: * Move async gen free lists into PyInterpreterState. * Move _PyAsyncGen_MAXFREELIST define to pycore_interp.h * Add _Py_async_gen_state structure. * Add tstate parameter to _PyAsyncGen_ClearFreeLists and _PyAsyncGen_Fini().
* bpo-40521: Make list free list per-interpreter (GH-20642)Victor Stinner2020-06-051-0/+11
| | | | | | | | | | | | Each interpreter now has its own list free list: * Move list numfree and free_list into PyInterpreterState. * Add _Py_list_state structure. * Add tstate parameter to _PyList_ClearFreeList() and _PyList_Fini(). * Remove "#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS". * _PyGC_Fini() clears gcstate->garbage list which can be stored in the list free list. Call _PyGC_Fini() before _PyList_Fini() to prevent leaking this list.
* bpo-40521: Make frame free list per-interpreter (GH-20638)Victor Stinner2020-06-041-0/+7
| | | | | | | | | | Each interpreter now has its own frame free list: * Move frame free list into PyInterpreterState. * Add _Py_frame_state structure. * Add tstate parameter to _PyFrame_ClearFreeList() and _PyFrame_Fini(). * Remove "#if PyFrame_MAXFREELIST > 0". * Remove "#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS".
* bpo-40521: Make slice cache per-interpreter (GH-20637)Victor Stinner2020-06-041-0/+4
| | | | | | Each interpreter now has its own slice cache: * Move slice cache into PyInterpreterState. * Add tstate parameter to _PySlice_Fini().
* bpo-40521: Make float free list per-interpreter (GH-20636)Victor Stinner2020-06-041-0/+9
| | | | | | | | Each interpreter now has its own float free list: * Move tuple numfree and free_list into PyInterpreterState. * Add _Py_float_state structure. * Add tstate parameter to _PyFloat_ClearFreeList() and _PyFloat_Fini().
* bpo-40521: Make tuple free list per-interpreter (GH-20247)Victor Stinner2020-06-041-0/+21
| | | | | | | | | | Each interpreter now has its own tuple free lists: * Move tuple numfree and free_list arrays into PyInterpreterState. * Define PyTuple_MAXSAVESIZE and PyTuple_MAXFREELIST macros in pycore_interp.h. * Add _Py_tuple_state structure. Pass it explicitly to tuple_alloc(). * Add tstate parameter to _PyTuple_ClearFreeList() * Each interpreter now has its own empty tuple singleton.
* bpo-40521: Add PyInterpreterState.unicode (GH-20081)Victor Stinner2020-05-131-8/+14
| | | | | | | Move PyInterpreterState.fs_codec into a new PyInterpreterState.unicode structure. Give a name to the fs_codec structure and use this structure in unicodeobject.c.
* bpo-40513: Per-interpreter GIL (GH-19943)Victor Stinner2020-05-051-0/+3
| | | | | | | | In the experimental isolated subinterpreters build mode, the GIL is now per-interpreter. Move gil from _PyRuntimeState.ceval to PyInterpreterState.ceval. new_interpreter() always get the config from the main interpreter.
* Revert "bpo-40513: Per-interpreter signals pending (GH-19924)" (GH-19932)Victor Stinner2020-05-051-2/+0
| | | This reverts commit 4e01946cafca0cf49f796c3118e0d65237bcad69.
* bpo-40513: Per-interpreter recursion_limit (GH-19929)Victor Stinner2020-05-051-0/+1
| | | | | | | | | | | Move recursion_limit member from _PyRuntimeState.ceval to PyInterpreterState.ceval. * Py_SetRecursionLimit() now only sets _Py_CheckRecursionLimit of ceval.c if the current Python thread is part of the main interpreter. * Inline _Py_MakeEndRecCheck() into _Py_LeaveRecursiveCall(). * Convert _Py_RecursionLimitLowerWaterMark() macro into a static inline function.
* bpo-40513: Per-interpreter gil_drop_request (GH-19927)Victor Stinner2020-05-051-0/+2
| | | | Move gil_drop_request member from _PyRuntimeState.ceval to PyInterpreterState.ceval.
* bpo-40513: Per-interpreter signals pending (GH-19924)Victor Stinner2020-05-051-0/+2
| | | | Move signals_pending from _PyRuntime.ceval to PyInterpreterState.ceval.
* bpo-40302: Replace PY_INT64_T with int64_t (GH-19573)Victor Stinner2020-04-171-1/+1
| | | | | | | | | * Replace PY_INT64_T with int64_t * Replace PY_UINT32_T with uint32_t * Replace PY_UINT64_T with uint64_t sha3module.c no longer checks if PY_UINT64_T is defined since it's always defined and uint64_t is always available on platforms supported by Python.
* bpo-40268: Move struct _gc_runtime_state to pycore_gc.h (GH-19515)Victor Stinner2020-04-141-1/+1
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* bpo-40241: Add pycore_interp.h header (GH-19499)Victor Stinner2020-04-131-0/+183
Move PyInterpreterState and related functions to a new internal pycore_interp.h header file.
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