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* bpo-44032: Move data stack to thread from FrameObject. (GH-26076)Mark Shannon2021-05-214-86/+206
| | | | | | | | | | | | | | | | * 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-44131: Py_FrozenMain() uses PyConfig_SetBytesArgv() (GH-26201)Victor Stinner2021-05-201-70/+14
| | | | | Moreover, Py_FrozenMain() relies on Py_InitializeFromConfig() to handle the PYTHONUNBUFFERED environment variable and configure C stdio streams like stdout (make the stream unbuffered).
* Remove unused function in ceval.c (GH-26246)Pablo Galindo2021-05-191-9/+0
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* bpo-44131: Test Py_FrozenMain() (GH-26126)Victor Stinner2021-05-171-10/+16
| | | | | | | | | * Add test_frozenmain to test_embed * Add Programs/test_frozenmain.py * Add Programs/freeze_test_frozenmain.py * Add Programs/test_frozenmain.h * Add make regen-test-frozenmain * Add test_frozenmain command to Programs/_testembed * _testembed.c: add error(msg) function
* bpo-26110: Add ``CALL_METHOD_KW`` opcode to speedup method calls with ↵Ken Jin2021-05-156-179/+240
| | | | | | | | | keywords (GH-26014) * Add CALL_METHOD_KW * Make CALL_METHOD branchless too since it shares the same code * Place parentheses in STACK_SHRINK
* bpo-28146: Fix a confusing error message in str.format() (GH-24213)Irit Katriel2021-05-131-2/+8
| | | Automerge-Triggered-By: GH:pitrou
* bpo-44094: Remove deprecated PyErr_ APIs. (GH-26011)Inada Naoki2021-05-131-36/+0
| | | These APIs are deprecated since Python 3.3. They are not documented too.
* bpo-44113: Update fromzenmain not to use Py_SetProgramName (GH-26085)Dong-hee Na2021-05-131-2/+8
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* bpo-44113: Fix compiler warning in PySys_AddWarnOption() (GH-26084)Victor Stinner2021-05-131-0/+3
| | | Ignore Py_DEPRECATED() warning on purpose.
* Remove PyTryblock struct (GH-26059)Mark Shannon2021-05-121-26/+17
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* bpo-43933: Force RETURN_VALUE bytecodes to have line numbers (GH-26054)Mark Shannon2021-05-123-2939/+2969
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* Prevent access outside buffer (GH-26012)Dennis Sweeney2021-05-101-3/+5
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* bpo-28307: Convert simple C-style formatting with literal format into ↵Serhiy Storchaka2021-05-082-2164/+2383
| | | | | | | | | | | f-string. (GH-5012) C-style formatting with literal format containing only format codes %s, %r and %a (with optional width, precision and alignment) will be converted to an equivalent f-string expression. It can speed up formatting more than 2 times by eliminating runtime parsing of the format string and creating temporary tuple.
* bpo-44063: set the missing end locations on the compiler (GH-25956)Batuhan Taskaya2021-05-071-5/+13
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* bpo-40222: "Zero cost" exception handling (GH-25729)Mark Shannon2021-05-078-5291/+5951
| | | | | | | | "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-40943: Fix skipitem() didn't raise SystemError (GH-25937)Inada Naoki2021-05-071-8/+5
| | | | `convertitem()` raises `SystemError` when '#' is used without `PY_SSIZE_T_CLEAN`. This commit makes `skipitem()` raise it too.
* bpo-38530: Refactor and improve AttributeError suggestions (GH-25776)Dennis Sweeney2021-05-031-59/+130
| | | | | | | | | | | | | | | | | | | | - Make case-swaps half the cost of any other edit - Refactor Levenshtein code to not use memory allocator, and to bail early on no match. - Add comments to Levenshtein distance code - Add test cases for Levenshtein distance behind a debug macro - Set threshold to `(name_size + item_size + 3) * MOVE_COST / 6`. - Reasoning: similar to `difflib.SequenceMatcher.ratio()` >= 2/3: ``` "Multiset Jaccard similarity" >= 2/3 matching letters / total letters >= 2/3 (name_size - distance + item_size - distance) / (name_size + item_size) >= 2/3 1 - (2*distance) / (name_size + item_size) >= 2/3 1/3 >= (2*distance) / (name_size + item_size) (name_size + item_size) / 6 >= distance With rounding: (name_size + item_size + 3) // 6 >= distance ``` Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
* bpo-43754: Fix compiler warning in Python/compile.c (GH-25855)Pablo Galindo2021-05-031-1/+1
| | | | | This fixes the following warning: 'initializing': conversion from 'Py_ssize_t' to 'int', possible loss of data [D:\a\cpython\cpython\PCbuild\pythoncore.vcxproj]
* bpo-43916: Move the _PyStructSequence_InitType function to the internal API ↵Pablo Galindo2021-05-031-0/+1
| | | | (GH-25854)
* bpo-42725: Render annotations effectless on symbol table with PEP 563 (GH-25583)Batuhan Taskaya2021-05-031-10/+91
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* bpo-43754: Eliminate bindings for partial pattern matches (GH-25229)Brandt Bucher2021-05-024-340/+483
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* bpo-43933: Set frame.f_lineno during call to __exit__ (GH-25719)Mark Shannon2021-04-304-2950/+2956
| | | * Set line number of __exit__ call in a with statement to be that of the with keyword.
* bpo-43667: Fix broken Unicode encoding in non-UTF locales on Solaris (GH-25096)Jakub Kulík2021-04-301-0/+106
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* bpo-43916: PyStdPrinter_Type uses Py_TPFLAGS_DISALLOW_INSTANTIATION (GH-25749)Victor Stinner2021-04-301-1/+1
| | | | | | | The PyStdPrinter_Type type now uses the Py_TPFLAGS_DISALLOW_INSTANTIATION flag to disallow instantiation, rather than seting a tp_init method which always fail. Write also unit tests for PyStdPrinter_Type.
* bpo-43916: Add Py_TPFLAGS_DISALLOW_INSTANTIATION type flag (GH-25721)Victor Stinner2021-04-301-30/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 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-43977: Use tp_flags for collection matching (GH-25723)Mark Shannon2021-04-302-66/+8
| | | | | | | | | | | | | * 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-43892: Validate the first term of complex literal value patterns (GH-25735)Brandt Bucher2021-04-302-38/+20
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* bpo-42800: Rename AUDIT_READ to PY_AUDIT_READ (GH-25736)Steve Dower2021-04-301-1/+1
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* bpo-42800: add audit hooks for f_code and tb_frame (GH-24182)Ryan Hileman2021-04-291-1/+1
| | | | | | | | | | Accessing the following attributes will now fire PEP 578 style audit hooks as ("object.__getattr__", obj, name): * PyTracebackObject: tb_frame * PyFrameObject: f_code * PyGenObject: gi_code, gi_frame * PyCoroObject: cr_code, cr_frame * PyAsyncGenObject: ag_code, ag_frame Add an AUDIT_READ attribute flag aliased to READ_RESTRICTED. Update obsolete flag documentation.
* bpo-42739: Don't use sentinels to mark end of line table. (GH-25657)Mark Shannon2021-04-295-4952/+4921
| | | | | * Add length parameter to PyLineTable_InitAddressRange and doen't use sentinel values at end of table. Makes the line number table more robust. * Update PyCodeAddressRange to match PEP 626.
* bpo-43892: Make match patterns explicit in the AST (GH-25585)Nick Coghlan2021-04-297-488/+1498
| | | Co-authored-by: Brandt Bucher <brandtbucher@gmail.com>
* bpo-43962: Fix _PyInterpreterState_IDIncref() (GH-25683)Victor Stinner2021-04-281-6/+7
| | | | _PyInterpreterState_IDIncref() now calls _PyInterpreterState_IDInitref() and always increments id_refcount.
* bpo-38530: Require 50% similarity in NameError and AttributeError ↵Dennis Sweeney2021-04-271-1/+4
| | | | suggestions (GH-25584)
* bpo-42609: Check recursion depth in the AST validator and optimizer (GH-23744)Serhiy Storchaka2021-04-252-142/+291
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* bpo-42737: annotations with complex targets no longer causes any runtime ↵Batuhan Taskaya2021-04-251-0/+6
| | | | effects (GH-23952)
* bpo-30555: Fix WindowsConsoleIO fails in the presence of fd redirection ↵Segev Finer2021-04-231-16/+45
| | | | | | | | (GH-1927) This works by not caching the handle and instead getting the handle from the file descriptor each time, so that if the actual handle changes by fd redirection closing/opening the console handle beneath our feet, we will keep working correctly.
* bpo-43914: Highlight invalid ranges in SyntaxErrors (#25525)Pablo Galindo2021-04-234-62/+209
| | | | | | | | | | | | | | | | | To improve the user experience understanding what part of the error messages associated with SyntaxErrors is wrong, we can highlight the whole error range and not only place the caret at the first character. In this way: >>> foo(x, z for z in range(10), t, w) File "<stdin>", line 1 foo(x, z for z in range(10), t, w) ^ SyntaxError: Generator expression must be parenthesized becomes >>> foo(x, z for z in range(10), t, w) File "<stdin>", line 1 foo(x, z for z in range(10), t, w) ^^^^^^^^^^^^^^^^^^^^ SyntaxError: Generator expression must be parenthesized
* bpo-43475: Fix worst case collision behavior for NaN instances (GH-25493)Raymond Hettinger2021-04-222-5/+11
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* bpo-38605: Revert making 'from __future__ import annotations' the default ↵Pablo Galindo2021-04-214-120/+157
| | | | | | (GH-25490) This reverts commits 044a1048ca93d466965afc027b91a5a9eb9ce23c and 1be456ae9d53bb1cba2b24fc86175c282d1c2169, adapting the code to changes that happened after it.
* bpo-25460: Surround suggestions by quotes (GH-25473)Pablo Galindo2021-04-191-2/+2
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* bpo-38530: Cover more error paths in error suggestion functions (GH-25462)Pablo Galindo2021-04-171-2/+5
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* bpo-38530: Include builtins in NameError suggestions (GH-25460)Pablo Galindo2021-04-171-1/+11
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* bpo-38530: Match exactly AttributeError and NameError when offering ↵Pablo Galindo2021-04-161-2/+2
| | | | suggestions (GH-25443)
* bpo-41323: compiler: Reuse tuple in constant tuple folding (GH-25419)Inada Naoki2021-04-164-3253/+3266
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* bpo-43846: Use less stack for large literals and calls (GH-25403)Mark Shannon2021-04-151-50/+144
| | | | | | | | | * Modify compiler to reduce stack consumption for large expressions. * Add more tests for stack usage. * Add NEWS item. * Raise SystemError for truly excessive stack use.
* bpo-38530: Optimize the calculation of string sizes when offering ↵Pablo Galindo2021-04-141-8/+10
| | | | suggestions (GH-25412)
* bpo-38530: Make sure that failing to generate suggestions on failure will ↵Pablo Galindo2021-04-142-7/+5
| | | | not propagate exceptions (GH-25408)
* bpo-38530: Offer suggestions on NameError (GH-25397)Pablo Galindo2021-04-142-8/+69
| | | | | | | | | | | When printing NameError raised by the interpreter, PyErr_Display will offer suggestions of simmilar variable names in the function that the exception was raised from: >>> schwarzschild_black_hole = None >>> schwarschild_black_hole Traceback (most recent call last): File "<stdin>", line 1, in <module> NameError: name 'schwarschild_black_hole' is not defined. Did you mean: schwarzschild_black_hole?
* bpo-38530: Offer suggestions on AttributeError (#16856)Pablo Galindo2021-04-142-1/+157
| | | | | | | | | When printing AttributeError, PyErr_Display will offer suggestions of similar attribute names in the object that the exception was raised from: >>> collections.namedtoplo Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: module 'collections' has no attribute 'namedtoplo'. Did you mean: namedtuple?
* bpo-43760: Speed up check for tracing in interpreter dispatch (#25276)Mark Shannon2021-04-133-28/+38
| | | | | | | | | * 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
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