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* bpo-46845: Reduce dict size when all keys are Unicode (GH-31564)Inada Naoki2022-03-011-4/+8
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* bpo-46841: Use inline cache for `BINARY_SUBSCR`. (GH-31618)Mark Shannon2022-03-011-1/+3
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* bpo-46329: Change calling sequence (again) (GH-31373)Mark Shannon2022-02-181-1/+1
| | | | * Change calling sequence: Add PUSH_NULL. Merge PRECALL_FUNCTION and PRECALL_METHOD into PRECALL.
* bpo-46675: Allow object value arrays and split key dictionaries larger than ↵Mark Shannon2022-02-081-4/+5
| | | | 16 (GH-31191)
* bpo-40280: Skip subprocess-based tests on wasm32-emscripten (GH-30615)Christian Heimes2022-01-251-0/+7
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* bpo-46481: Implement vectorcall for weakref.ref.__call__ method. (GH-30820)Dong-hee Na2022-01-231-2/+2
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* bpo-46409: Make generators in bytecode (GH-30633)Mark Shannon2022-01-201-2/+2
| | | | | | | | | | | | * Add RETURN_GENERATOR and JUMP_NO_INTERRUPT opcodes. * Trim frame and generator by word each. * Minor refactor of frame.c * Update test.test_sys to account for smaller frames. * Treat generator functions as normal functions when evaluating and specializing.
* bpo-42161: Hoist the _PyLong_GetOne() call out of the inner loop. (GH-30656)Raymond Hettinger2022-01-181-1/+1
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* bpo-46328: Add sys.exception() (GH-30514)Irit Katriel2022-01-131-0/+63
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* bpo-45256: Don't track the exact depth of each `InterpreterFrame` (GH-30372)Brandt Bucher2022-01-051-2/+2
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* bpo-45711: Remove type and traceback from exc_info (GH-30122)Irit Katriel2021-12-171-1/+1
| | | | | | | | * Do not PUSH/POP traceback or type to the stack as part of exc_info * Remove exc_traceback and exc_type from _PyErr_StackItem * Add to what's new, because this change breaks things like Cython
* bpo-45947: Place dict and values pointer at fixed (negative) offset just ↵Mark Shannon2021-12-071-2/+2
| | | | | | | | | | | | | | | | | | | before GC header. (GH-29879) * Place __dict__ immediately before GC header for plain Python objects. * Fix up lazy dict creation logic to use managed dict pointers. * Manage values pointer, placing them directly before managed dict pointers. * Convert hint-based load/store attr specialization target managed dict classes. * Specialize LOAD_METHOD for managed dict objects. * Remove unsafe _PyObject_GC_Calloc function. * Remove unsafe _PyObject_GC_Malloc() function. * Add comment explaning use of Py_TPFLAGS_MANAGED_DICT.
* bpo-45963: Make space for the InterpreterFrame of a generator in that ↵Mark Shannon2021-12-061-1/+1
| | | | | | | generator. (GH-29891) * Make generator, coroutine and async gen structs all the same size. * Store interpreter frame in generator (and coroutine). Reduces the number of allocations neeeded for a generator from two to one.
* bpo-45607: Make it possible to enrich exception displays via setting their ↵Irit Katriel2021-12-031-4/+4
| | | | __note__ field (GH-29880)
* bpo-45786: Allocate space for frame in frame object. (GH-29729)Mark Shannon2021-11-291-3/+4
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* bpo-45522: Allow to disable freelists on build time (GH-29056)Christian Heimes2021-10-211-1/+12
| | | | | | | | Freelists for object structs can now be disabled. A new ``configure`` option ``--without-freelists`` can be used to disable all freelists except empty tuple singleton. Internal Py*_MAXFREELIST macros can now be defined as 0 without causing compiler warnings and segfaults. Signed-off-by: Christian Heimes <christian@python.org>
* bpo-45315: PyType_FromSpec: Copy spec->name and have the type own the memory ↵Petr Viktorin2021-10-211-1/+1
| | | | for its name (GH-29103)
* bpo-45340: Don't create object dictionaries unless actually needed (GH-28802)Mark Shannon2021-10-131-5/+5
| | | | | | | | | | | | | | * Never change types' cached keys. It could invalidate inline attribute objects. * Lazily create object dictionaries. * Update specialization of LOAD/STORE_ATTR. * Don't update shared keys version for deletion of value. * Update gdb support to handle instance values. * Rename SPLIT_KEYS opcodes to INSTANCE_VALUE.
* bpo-29410: Change the default hash algorithm to SipHash13. (GH-28752)Inada Naoki2021-10-101-2/+4
| | | | Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no> Co-authored-by: Christian Heimes <christian@python.org>
* bpo-45403: Fix test_sys.test_stdlib_dir() (GH-28785)Victor Stinner2021-10-071-2/+2
| | | | Fix test_sys.test_stdlib_dir() when Python is built outside the source tree: compare normalized paths.
* Fix typos in the Lib directory (GH-28775)Christian Clauss2021-10-061-2/+2
| | | | | Fix typos in the Lib directory as identified by codespell. Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
* bpo-45211: Remember the stdlib dir during startup. (gh-28586)Eric Snow2021-09-281-0/+10
| | | | | During runtime startup we figure out the stdlib dir but currently throw that information away. This change preserves it and exposes it via PyConfig.stdlib_dir, _Py_GetStdlibDir(), and sys._stdlib_dir. https://bugs.python.org/issue45211
* bpo-41031: Match C and Python code formatting of unprintable exceptions and ↵Irit Katriel2021-09-051-8/+18
| | | | exceptions in the __main__ module. (GH-28139)
* bpo-45083: Include the exception class qualname when formatting an exception ↵Irit Katriel2021-09-031-0/+14
| | | | | (GH-28119) Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>
* bpo-44590: Lazily allocate frame objects (GH-27077)Mark Shannon2021-07-261-1/+1
| | | | | | | | | | | | | | * Convert "specials" array to InterpreterFrame struct, adding f_lasti, f_state and other non-debug FrameObject fields to it. * Refactor, calls pushing the call to the interpreter upward toward _PyEval_Vector. * Compute f_back when on thread stack, only filling in value when frame object outlives stack invocation. * Move ownership of InterpreterFrame in generator from frame object to generator object. * Do not create frame objects for Python calls. * Do not create frame objects for generators.
* bpo-44207: Add an internal version number to function objects. (GH-27078)Mark Shannon2021-07-121-1/+1
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* bpo-44032: Move pointer to code object from frame-object to frame specials ↵Mark Shannon2021-06-181-1/+1
| | | | array. (GH-26771)
* bpo-44206: Add a version number to dictionary keys (GH-26333)Mark Shannon2021-05-281-4/+5
| | | | | | | | * Store log2(size) instead of size in dict-keys. * Use enum instead of function pointer to record kind of keys. * Add version number to dict keys.
* bpo-44032: Move data stack to thread from FrameObject. (GH-26076)Mark Shannon2021-05-211-5/+1
| | | | | | | | | | | | | | | | * Remove 'zombie' frames. We won't need them once we are allocating fixed-size frames. * Add co_nlocalplus field to code object to avoid recomputing size of locals + frees + cells. * Move locals, cells and freevars out of frame object into separate memory buffer. * Use per-threadstate allocated memory chunks for local variables. * Move globals and builtins from frame object to per-thread stack. * Move (slow) locals frame object to per-thread stack. * Move internal frame functions to internal header.
* bpo-40222: "Zero cost" exception handling (GH-25729)Mark Shannon2021-05-071-4/+3
| | | | | | | | "Zero cost" exception handling. * Uses a lookup table to determine how to handle exceptions. * Removes SETUP_FINALLY and POP_TOP block instructions, eliminating (most of) the runtime overhead of try statements. * Reduces the size of the frame object by about 60%.
* bpo-43916: Add Py_TPFLAGS_DISALLOW_INSTANTIATION type flag (GH-25721)Victor Stinner2021-04-301-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a new Py_TPFLAGS_DISALLOW_INSTANTIATION type flag to disallow creating type instances: set tp_new to NULL and don't create the "__new__" key in the type dictionary. The flag is set automatically on static types if tp_base is NULL or &PyBaseObject_Type and tp_new is NULL. Use the flag on the following types: * _curses.ncurses_version type * _curses_panel.panel * _tkinter.Tcl_Obj * _tkinter.tkapp * _tkinter.tktimertoken * _xxsubinterpretersmodule.ChannelID * sys.flags type * sys.getwindowsversion() type * sys.version_info type Update MyStr example in the C API documentation to use Py_TPFLAGS_DISALLOW_INSTANTIATION. Add _PyStructSequence_InitType() function to create a structseq type with the Py_TPFLAGS_DISALLOW_INSTANTIATION flag set. type_new() calls _PyType_CheckConsistency() at exit.
* bpo-43660: Fix crash when displaying exceptions with custom values for ↵Pablo Galindo2021-03-291-0/+15
| | | | sys.stderr (GH-25075)
* bpo-43510: Implement PEP 597 opt-in EncodingWarning. (GH-19481)Inada Naoki2021-03-291-1/+2
| | | | | | | | | | | See [PEP 597](https://www.python.org/dev/peps/pep-0597/). * Add `-X warn_default_encoding` and `PYTHONWARNDEFAULTENCODING`. * Add EncodingWarning * Add io.text_encoding() * open(), TextIOWrapper() emits EncodingWarning when encoding is omitted and warn_default_encoding is enabled. * _pyio.TextIOWrapper() uses UTF-8 as fallback default encoding used when failed to import locale module. (used during building Python) * bz2, configparser, gzip, lzma, pathlib, tempfile modules use io.text_encoding(). * What's new entry
* bpo-42990: Introduce 'frame constructor' struct to simplify API for ↵Mark Shannon2021-01-291-1/+1
| | | | | | | PyEval_CodeEval and friends (GH-24298) * Introduce 'frame constructor' to simplify API for frame creation * Embed struct using a macro to conform to PEP 7
* bpo-42955: Rename module_names to sys.stdlib_module_names (GH-24332)Victor Stinner2021-01-251-2/+2
| | | | * Rename _Py_module_names to _Py_stdlib_module_names. * Rename Python/module_names.h to Python/stdlib_module_names.h.
* bpo-42955: Add sys.modules_names (GH-24238)Victor Stinner2021-01-251-0/+5
| | | | Add sys.module_names, containing the list of the standard library module names.
* bpo-27794: Add `name` attribute to `property` class (GH-23967)Yurii Karabas2020-12-301-1/+1
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* bpo-42500: Fix recursion in or after except (GH-23568)Mark Shannon2020-12-021-39/+7
| | | * Use counter, rather boolean state when handling soft overflows.
* bpo-42085: Introduce dedicated entry in PyAsyncMethods for sending values ↵Vladimir Matveev2020-11-101-1/+1
| | | | (#22780)
* bpo-41435: Add sys._current_exceptions() function (GH-21689)Julien Danjou2020-11-021-0/+67
| | | | | | This adds a new function named sys._current_exceptions() which is equivalent ot sys._current_frames() except that it returns the exceptions currently handled by other threads. It is equivalent to calling sys.exc_info() for each running thread.
* bpo-40275: Use new test.support helper submodules in tests (GH-21451)Hai Shi2020-08-031-3/+4
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* bpo-40941: Unify implicit and explicit state in the frame and generator ↵Mark Shannon2020-07-171-2/+2
| | | | | | | objects into a single value. (GH-20803) * Merge gen and frame state variables into one. * Replace stack pointer with depth in PyFrameObject. Makes code easier to read and saves a word of memory.
* bpo-23427: Add sys.orig_argv attribute (GH-20729)Victor Stinner2020-06-291-0/+20
| | | | | | | Add sys.orig_argv attribute: the list of the original command line arguments passed to the Python executable. Rename also PyConfig._orig_argv to PyConfig.orig_argv and document it.
* bpo-40947: getpath.c uses PyConfig.platlibdir (GH-20807)Victor Stinner2020-06-111-0/+1
| | | | | | | | | | | Followup of bpo-40854, there is one remaining usage of PLATLIBDIR which should be replaced by config->platlibdir. test_sys checks that sys.platlibdir attribute exists and is a string. Update Makefile: getpath.c and sysmodule.c no longer need PLATLIBDIR macro, PyConfig.platlibdir member is used instead. Co-authored-by: Sandro Mani <manisandro@gmail.com>
* bpo-40275: Adding threading_helper submodule in test.support (GH-20263)Hai Shi2020-05-271-3/+4
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* bpo-38787: C API for module state access from extension methods (PEP 573) ↵Petr Viktorin2020-05-071-1/+1
| | | | | | | | | (GH-19936) Module C state is now accessible from C-defined heap type methods (PEP 573). Patch by Marcel Plch and Petr Viktorin. Co-authored-by: Marcel Plch <mplch@redhat.com> Co-authored-by: Victor Stinner <vstinner@python.org>
* bpo-40334: Rename PyConfig.use_peg to _use_peg_parser (GH-19670)Victor Stinner2020-04-231-1/+1
| | | | | | | | | | | * Rename PyConfig.use_peg to _use_peg_parser * Document PyConfig._use_peg_parser and mark it a deprecated * Mark -X oldparser option and PYTHONOLDPARSER env var as deprecated in the documentation. * Add use_old_parser() and skip_if_new_parser() to test.support * Remove sys.flags.use_peg: use_old_parser() uses _testinternalcapi.get_configs() instead. * Enhance test_embed tests * subprocess._args_from_interpreter_flags() copies -X oldparser
* bpo-40334: PEP 617 implementation: New PEG parser for CPython (GH-19503)Pablo Galindo2020-04-221-4/+4
| | | | Co-authored-by: Guido van Rossum <guido@python.org> Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com>
* bpo-40241: Add pycore_gc.h header file (GH-19494)Victor Stinner2020-04-131-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Move the PyGC_Head structure and the following private macros to the internal C API: * _PyGCHead_FINALIZED() * _PyGCHead_NEXT() * _PyGCHead_PREV() * _PyGCHead_SET_FINALIZED() * _PyGCHead_SET_NEXT() * _PyGCHead_SET_PREV() * _PyGC_FINALIZED() * _PyGC_PREV_MASK * _PyGC_PREV_MASK_COLLECTING * _PyGC_PREV_MASK_FINALIZED * _PyGC_PREV_SHIFT * _PyGC_SET_FINALIZED() * _PyObject_GC_IS_TRACKED() * _PyObject_GC_MAY_BE_TRACKED() * _Py_AS_GC(o) Keep the private _PyGC_FINALIZED() macro in the public C API for backward compatibility with Python 3.8: make it an alias to the new PyObject_GC_IsFinalized() function. Move the SIZEOF_PYGC_HEAD constant from _testcapi module to _testinternalcapi module.
* bpo-39947: Move get_recursion_depth() to _testinternalcapi (GH-18974)Victor Stinner2020-03-131-1/+1
| | | | | Move get_recursion_depth() function from _testcapi to _testinternalcapi to avoid accessing PyThreadState attributes directly in _testcapi.
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