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* gh-99139: Improve NameError error suggestion for instances (#99140)Pablo Galindo Salgado2022-11-061-0/+23
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* GH-99104: Update headers for bytecodes.c and generate_cases.py (#99112)Guido van Rossum2022-11-052-8/+17
| | | Also tweak the labels near the end of bytecodes.c.
* GH-98686: Fix compiler warning for HAS_ARG (GH-99106)Brandt Bucher2022-11-041-1/+1
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* GH-98831: Add some macros definitions to bytecodes.c to reduce IDE warnings. ↵Mark Shannon2022-11-041-2/+29
| | | | (#99093)
* GH-98831: Auto-generate PREDICTED() macro calls (#99102)Guido van Rossum2022-11-041-16/+0
| | | Co-authored-by: Brandt Bucher <brandtbucher@gmail.com>
* gh-92584: Remove the distutils package (#99061)Victor Stinner2022-11-031-1/+0
| | | | | | | | | | | | Remove the distutils package. It was deprecated in Python 3.10 by PEP 632 "Deprecate distutils module". For projects still using distutils and cannot be updated to something else, the setuptools project can be installed: it still provides distutils. * Remove Lib/distutils/ directory * Remove test_distutils * Remove references to distutils * Skip test_check_c_globals and test_peg_generator since they use distutils
* gh-98978: Fix Py_SetPythonHome(NULL) (#99066)Victor Stinner2022-11-031-0/+6
| | | | | | Fix use-after-free in Py_SetPythonHome(NULL), Py_SetProgramName(NULL) and _Py_SetProgramFullPath(NULL) function calls. Issue reported by Benedikt Reinartz.
* GH-96793: Implement PEP 479 in bytecode. (GH-99006)Mark Shannon2022-11-034-24/+147
| | | | | * Handle converting StopIteration to RuntimeError in bytecode. * Add custom instruction for converting StopIteration into RuntimeError.
* GH-98831: "Generate" the interpreter (#98830)Guido van Rossum2022-11-033-3850/+7867
| | | | | | | | | | | The switch cases (really TARGET(opcode) macros) have been moved from ceval.c to generated_cases.c.h. That file is generated from instruction definitions in bytecodes.c (which impersonates a C file so the C code it contains can be edited without custom support in e.g. VS Code). The code generator lives in Tools/cases_generator (it has a README.md explaining how it works). The DSL used to describe the instructions is a work in progress, described in https://github.com/faster-cpython/ideas/blob/main/3.12/interpreter_definition.md. This is surely a work-in-progress. An easy next step could be auto-generating super-instructions. **IMPORTANT: Merge Conflicts** If you get a merge conflict for instruction implementations in ceval.c, your best bet is to port your changes to bytecodes.c. That file looks almost the same as the original cases, except instead of `TARGET(NAME)` it uses `inst(NAME)`, and the trailing `DISPATCH()` call is omitted (the code generator adds it automatically).
* GH-98686: Quicken everything (GH-98687)Brandt Bucher2022-11-025-86/+25
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* gh-87092: remove unused SET_LOC/UNSET_LOC macros (GH-98914)Irit Katriel2022-11-021-73/+6
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* gh-87092: do not allocate PyFutureFeatures dynamically (GH-98913)Irit Katriel2022-11-023-29/+18
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* gh-98925: Lower marshal recursion depth for WASI (GH-98938)Brett Cannon2022-11-011-0/+2
| | | | | For wasmtime 2.0, the stack depth cost is 6% higher. This causes the default max `marshal` recursion depth to blow the stack. As the default marshal depth is 2000 and Windows is set to 1000, split the difference and choose 1500 for WASI to be safe.
* Rename JUMP_TO_INSTRUCTION to GO_TO_INSTRUCTION (#98934)Guido van Rossum2022-11-011-14/+14
| | | | | | This reduces confusion between jumps at the bytecode level (e.g. JUMPTO(), JUMPBY(), and various JUMP_*() opcodes) and jumps in the C code (which are 'goto' statements).
* gh-98610: Adjust the Optional Restrictions on Subinterpreters (GH-98618)Eric Snow2022-10-311-2/+8
| | | | | | | Previously, the optional restrictions on subinterpreters were: disallow fork, subprocess, and threads. By default, we were disallowing all three for "isolated" interpreters. We always allowed all three for the main interpreter and those created through the legacy `Py_NewInterpreter()` API. Those settings were a bit conservative, so here we've adjusted the optional restrictions to: fork, exec, threads, and daemon threads. The default for "isolated" interpreters disables fork, exec, and daemon threads. Regular threads are allowed by default. We continue always allowing everything For the main interpreter and the legacy API. In the code, we add `_PyInterpreterConfig.allow_exec` and `_PyInterpreterConfig.allow_daemon_threads`. We also add `Py_RTFLAGS_DAEMON_THREADS` and `Py_RTFLAGS_EXEC`.
* gh-98811: use full source location to simplify __future__ imports error ↵Irit Katriel2022-10-312-66/+49
| | | | checking. This also fixes an incorrect error offset. (GH-98812)
* gh-98879: Remove unreachable error case from COMPARE_OP_STR_JUMP (GH-98882)Dennis Sweeney2022-10-301-3/+0
| | | Thanks to PEP 623 changes, the comparison cannot fail.
* gh-96853: Restore test coverage for Py_Initialize(Ex) (GH-98212)Nick Coghlan2022-10-301-0/+1
| | | | | | | | | | | * As most of `test_embed` now uses `Py_InitializeFromConfig`, add a specific test case to cover `Py_Initialize` (and `Py_InitializeEx`) * Rename `_testembed` init helper to clarify the API used * Add a `PyConfig_Clear` call in `Py_InitializeEx` to make the code more obviously correct (it already didn't leak as none of the dynamically allocated config fields were being populated, but it's clearer if the wrappers follow the documented API usage guidelines)
* gh-98789: Fix FOR_ITER assert on big-endian (GH-98792)Dennis Sweeney2022-10-281-1/+1
| | | Fix FOR_ITER assertion syntax
* gh-96143: Improve perf profiler docs (#96445)Erlend E. Aasland2022-10-272-10/+14
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* GH-96793: Change `FOR_ITER` to not pop the iterator on exhaustion. (GH-96801)Mark Shannon2022-10-274-30/+39
| | | | Change FOR_ITER to have the same stack effect regardless of whether it branches or not. Performance is unchanged as FOR_ITER (and specialized forms jump over the cleanup code).
* gh-98608: Change _Py_NewInterpreter() to _Py_NewInterpreterFromConfig() ↵Eric Snow2022-10-263-17/+40
| | | | | | | | | | | | | | | | | | | | | | | | | (gh-98609) (see https://github.com/python/cpython/issues/98608) This change does the following: 1. change the argument to a new `_PyInterpreterConfig` struct 2. rename the function to `_Py_NewInterpreterFromConfig()`, inspired by `Py_InitializeFromConfig()` (takes a `_PyInterpreterConfig` instead of `isolated_subinterpreter`) 3. split up the boolean `isolated_subinterpreter` into the corresponding multiple granular settings * allow_fork * allow_subprocess * allow_threads 4. add `PyInterpreterState.feature_flags` to store those settings 5. add a function for checking if a feature is enabled on an opaque `PyInterpreterState *` 6. drop `PyConfig._isolated_interpreter` The existing default (see `Py_NewInterpeter()` and `Py_Initialize*()`) allows fork, subprocess, and threads and the optional "isolated" interpreter (see the `_xxsubinterpreters` module) disables all three. None of that changes here; the defaults are preserved. Note that the given `_PyInterpreterConfig` will not be used outside `_Py_NewInterpreterFromConfig()`, nor preserved. This contrasts with how `PyConfig` is currently preserved, used, and even modified outside `Py_InitializeFromConfig()`. I'd rather just avoid that mess from the start for `_PyInterpreterConfig`. We can preserve it later if we find an actual need. This change allows us to follow up with a number of improvements (e.g. stop disallowing subprocess and support disallowing exec instead). (Note that this PR adds "private" symbols. We'll probably make them public, and add docs, in a separate change.)
* gh-90716: add _pylong.py module (#96673)Neil Schemenauer2022-10-261-0/+1
| | | | | | | | | | | | Add Python implementations of certain longobject.c functions. These use asymptotically faster algorithms that can be used for operations on integers with many digits. In those cases, the performance overhead of the Python implementation is not significant since the asymptotic behavior is what dominates runtime. Functions provided by this module should be considered private and not part of any public API. Co-author: Tim Peters <tim.peters@gmail.com> Co-author: Mark Dickinson <dickinsm@gmail.com> Co-author: Bjorn Martinsson
* gh-91058: Add error suggestions to 'import from' import errors (#98305)Pablo Galindo Salgado2022-10-253-5/+61
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* gh-96143: Move the perf trampoline files to the Python directory (#98675)Pablo Galindo Salgado2022-10-252-0/+559
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* gh-98461: Fix location of RETURN_VALUE in async generator bytecode. ↵Irit Katriel2022-10-251-56/+43
| | | | compiler_jump_if no longer needs a pointer to the loc. (GH-98494)
* gh-97912: Avoid quadratic behavior when adding LOAD_FAST_CHECK (GH-97952)Dennis Sweeney2022-10-201-64/+135
| | | | | * The compiler analyzes the usage of the first 64 local variables all at once using bit masks. * Local variables beyond the first 64 are only partially analyzed, achieving linear time.
* gh-98461: Fix source location in comprehensions bytecode (GH-98464)Irit Katriel2022-10-201-60/+74
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* gh-98354: Add unicode check for 'name' attribute in _imp_create_builtin ↵chgnrdv2022-10-201-0/+8
| | | | | (GH-98412) Fixes #98354
* gh-98257: Make _PyEval_SetTrace() reentrant (#98258)Victor Stinner2022-10-191-44/+13
| | | | | | | | | | Make sys.setprofile() and sys.settrace() functions reentrant. They can no long fail with: RuntimeError("Cannot install a trace function while another trace function is being installed"). Make _PyEval_SetTrace() and _PyEval_SetProfile() functions reentrant, rather than detecting and rejecting reentrant calls. Only delete the reference to function arguments once the new function is fully set, when a reentrant call is safe. Call also _PySys_Audit() earlier.
* gh-98417: Store int_max_str_digits on the Interpreter State (GH-98418)Eric Snow2022-10-192-2/+4
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* gh-98398: Fix source locations for 'assert' bytecode (GH-98405)Irit Katriel2022-10-191-8/+10
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* gh-98390: Fix source locations of boolean sub-expressions (GH-98396)Irit Katriel2022-10-181-1/+1
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* gh-93691: Compiler's code-gen passes location around instead of holding it ↵Irit Katriel2022-10-171-848/+975
| | | | on the global compiler state (GH-98001)
* gh-97669: Create Tools/build/ directory (#97963)Victor Stinner2022-10-174-4/+4
| | | | | | | | | | | | | | | | | | | | | | | Create Tools/build/ directory. Move the following scripts from Tools/scripts/ to Tools/build/: * check_extension_modules.py * deepfreeze.py * freeze_modules.py * generate_global_objects.py * generate_levenshtein_examples.py * generate_opcode_h.py * generate_re_casefix.py * generate_sre_constants.py * generate_stdlib_module_names.py * generate_token.py * parse_html5_entities.py * smelly.py * stable_abi.py * umarshal.py * update_file.py * verify_ensurepip_wheels.py Update references to these scripts.
* gh-98254: Include stdlib module names in error messages for NameErrors (#98255)Pablo Galindo Salgado2022-10-152-30/+74
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* Fix some incorrect indentation around the main switch (#98177)Guido van Rossum2022-10-111-21/+20
| | | | | | The `}` marked with `/* End instructions */` is the end of the switch. There is another pair of `{}` around the switch, which is vestigial from ancient times when it was `for (;;) { switch (opcode) { ... } }`. All `DISPATCH` macro calls should be inside that pair.
* gh-97841: Add methoddef for _filters_mutated (gh-98115)Dong-hee Na2022-10-092-4/+26
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* gh-97922: Run the GC only on eval breaker (#97920)Pablo Galindo Salgado2022-10-081-10/+20
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* Add a warning message about PyOS_snprintf (#95993)Eric Wieser2022-10-071-0/+1
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* gh-86298: Ensure that __loader__ and __spec__.loader agree in ↵Barry Warsaw2022-10-071-3/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | warnings.warn_explicit() (GH-97803) In `_warnings.c`, in the C equivalent of `warnings.warn_explicit()`, if the module globals are given (and not None), the warning will attempt to get the source line for the issued warning. To do this, it needs the module's loader. Previously, it would only look up `__loader__` in the module globals. In https://github.com/python/cpython/issues/86298 we want to defer to the `__spec__.loader` if available. The first step on this journey is to check that `loader == __spec__.loader` and issue another warning if it is not. This commit does that. Since this is a PoC, only manual testing for now. ```python # /tmp/foo.py import warnings import bar warnings.warn_explicit( 'warning!', RuntimeWarning, 'bar.py', 2, module='bar knee', module_globals=bar.__dict__, ) ``` ```python # /tmp/bar.py import sys import os import pathlib # __loader__ = pathlib.Path() ``` Then running this: `./python.exe -Wdefault /tmp/foo.py` Produces: ``` bar.py:2: RuntimeWarning: warning! import os ``` Uncomment the `__loader__ = ` line in `bar.py` and try it again: ``` sys:1: ImportWarning: Module bar; __loader__ != __spec__.loader (<_frozen_importlib_external.SourceFileLoader object at 0x109f7dfa0> != PosixPath('.')) bar.py:2: RuntimeWarning: warning! import os ``` Automerge-Triggered-By: GH:warsaw
* GH-91052: Add C API for watching dictionaries (GH-31787)Carl Meyer2022-10-072-1/+8
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* bpo-38693: Use f-strings instead of str.format() within importlib (#17058)Gregory P. Smith2022-10-061-0/+1783
| | | | | | | | | This is a small performance improvement, especially for one or two hot places such as _handle_fromlist() that are called a lot and the .format() method was being used just to join two strings with a dot. Otherwise it is merely a readability improvement. We keep `_ERR_MSG` and `_ERR_MSG_PREFIX` as those may be used elsewhere for canonical looking error messages.
* GH-97002: Prevent `_PyInterpreterFrame`s from backing more than one ↵Brandt Bucher2022-10-061-6/+23
| | | | `PyFrameObject` (GH-97996)
* gh-97973: Return all necessary information from the tokenizer (GH-97984)Lysandros Nikolaou2022-10-061-9/+8
| | | | | Right now, the tokenizer only returns type and two pointers to the start and end of the token. This PR modifies the tokenizer to return the type and set all of the necessary information, so that the parser does not have to this.
* gh-65961: Raise `DeprecationWarning` when `__package__` differs from ↵Brett Cannon2022-10-051-1/+1
| | | | | | | `__spec__.parent` (#97879) Also remove `importlib.util.set_package()` which was already slated for removal. Co-authored-by: Eric Snow <ericsnowcurrently@gmail.com>
* gh-87092: bring compiler code closer to a preprocessing-opt-assembler ↵Irit Katriel2022-10-051-39/+49
| | | | organisation (GH-97644)
* GH-91079: Decouple C stack overflow checks from Python recursion checks. ↵Mark Shannon2022-10-057-51/+73
| | | | (GH-96510)
* GH-97779: Ensure that *all* frame objects are backed by "complete" frames ↵Brandt Bucher2022-10-051-0/+7
| | | | (GH-97845)
* gh-97670: Remove sys.getdxp() and analyze_dxp.py script (#97671)Victor Stinner2022-10-042-63/+0
| | | | | | | Remove the sys.getdxp() function and the Tools/scripts/analyze_dxp.py script. DXP stands for "dynamic execution pairs". They were related to DYNAMIC_EXECUTION_PROFILE and DXPAIRS macros which have been removed in Python 3.11. Python can now be built with "./configure --enable-pystats" to gather statistics on Python opcodes.
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