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* gh-98627: Add an Optional Check for Extension Module Subinterpreter ↵Eric Snow2023-02-162-0/+6
| | | | | | | | | | | | | | | Compatibility (gh-99040) Enforcing (optionally) the restriction set by PEP 489 makes sense. Furthermore, this sets the stage for a potential restriction related to a per-interpreter GIL. This change includes the following: * add tests for extension module subinterpreter compatibility * add _PyInterpreterConfig.check_multi_interp_extensions * add Py_RTFLAGS_MULTI_INTERP_EXTENSIONS * add _PyImport_CheckSubinterpIncompatibleExtensionAllowed() * fail iff the module does not implement multi-phase init and the current interpreter is configured to check https://github.com/python/cpython/issues/98627
* GH-101578: Normalize the current exception (GH-101607)Mark Shannon2023-02-082-3/+2
| | | | | | | | | | * Make sure that the current exception is always normalized. * Remove redundant type and traceback fields for the current exception. * Add new API functions: PyErr_GetRaisedException, PyErr_SetRaisedException * Add new API functions: PyException_GetArgs, PyException_SetArgs
* gh-59956: Clarify Runtime State Status Expectations (gh-101308)Eric Snow2023-01-301-1/+26
| | | | | | | | | | | | | A PyThreadState can be in one of many states in its lifecycle, represented by some status value. Those statuses haven't been particularly clear, so we're addressing that here. Specifically: * made the distinct lifecycle statuses clear on PyThreadState * identified expectations of how various lifecycle-related functions relate to status * noted the various places where those expectations don't match the actual behavior At some point we'll need to address the mismatches. (This change also includes some cleanup.) https://github.com/python/cpython/issues/59956
* GH-101291: Refactor the `PyLongObject` struct into object header and ↵Mark Shannon2023-01-301-2/+7
| | | | PyLongValue struct. (GH-101292)
* gh-77532: Minor tweaks to allow compiling with PlatformToolset=ClangCL on ↵Steve Dower2023-01-271-0/+4
| | | | | | Windows (GH-101352) To use this, ensure that clang support was selected in Visual Studio Installer, then set the PlatformToolset environment variable to "ClangCL" and build as normal from the command line. It remains unsupported, but at least is possible now for experimentation.
* gh-101152: Implement PEP 699 (GH-101193)ram vikram singh2023-01-241-0/+4
| | | | Co-authored-by: Kumar Aditya <59607654+kumaraditya303@users.noreply.github.com> Co-authored-by: Ken Jin <kenjin@python.org>
* gh-59956: Allow the "Trashcan" Mechanism to Work Without a Thread State ↵Eric Snow2023-01-232-3/+7
| | | | | | | | | | | | (gh-101209) We've factored out a struct from the two PyThreadState fields. This accomplishes two things: * make it clear that the trashcan-related code doesn't need any other parts of PyThreadState * allows us to use the trashcan mechanism even when there isn't a "current" thread state We still expect the caller to hold the GIL. https://github.com/python/cpython/issues/59956
* gh-101037: Fix potential memory underallocation for zeros of int subtypes ↵Mark Dickinson2023-01-211-0/+3
| | | | | | | | | (#101038) This PR fixes object allocation in long_subtype_new to ensure that there's at least one digit in all cases, and makes sure that the value of that digit is copied over from the source long. Needs backport to 3.11, but not any further: the change to require at least one digit was only introduced for Python 3.11. Fixes #101037.
* gh-59956: Clarify GILState-related Code (gh-101161)Eric Snow2023-01-191-5/+1
| | | | | | | | | | The objective of this change is to help make the GILState-related code easier to understand. This mostly involves moving code around and some semantically equivalent refactors. However, there are a also a small number of slight changes in structure and behavior: * tstate_current is moved out of _PyRuntimeState.gilstate * autoTSSkey is moved out of _PyRuntimeState.gilstate * autoTSSkey is initialized earlier * autoTSSkey is re-initialized (after fork) earlier https://github.com/python/cpython/issues/59956
* GH-100719: Remove the `co_nplaincellvars` field from code objects. (GH-100721)Mark Shannon2023-01-041-1/+5
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* GH-100222: fix typo _py_set_opocde -> _py_set_opcode (GH-100259)Carl Meyer2022-12-151-1/+1
| | | | | Typo introduced in #100223. Automerge-Triggered-By: GH:brandtbucher
* GH-100222: Redefine _Py_CODEUNIT as a union to clarify structure of code ↵Mark Shannon2022-12-141-14/+17
| | | | unit. (GH-100223)
* GH-98522: Add version number to code objects. (GH-98525)Mark Shannon2022-12-091-0/+1
| | | | | | * Add version number to code object for better versioning of functions. * Improves specialization for closures and list comprehensions.
* gh-98724: Fix Py_CLEAR() macro side effects (#99100) (#100070)Victor Stinner2022-12-071-20/+51
| | | | | | | | | | | | | | The Py_CLEAR(), Py_SETREF() and Py_XSETREF() macros now only evaluate their arguments once. If an argument has side effects, these side effects are no longer duplicated. Use temporary variables to avoid duplicating side effects of macro arguments. If available, use _Py_TYPEOF() to avoid type punning. Otherwise, use memcpy() for the assignment to prevent a miscompilation with strict aliasing caused by type punning. Add _Py_TYPEOF() macro: __typeof__() on GCC and clang. Add test_py_clear() and test_py_setref() unit tests to _testcapi.
* PyUnicode_KIND() uses _Py_RVALUE() (#100060)Victor Stinner2022-12-061-1/+1
| | | | The PyUnicode_KIND() macro is modified to use _Py_RVALUE(), so it can no longer be used as a l-value.
* gh-99741: Implement Multi-Phase Init for the _xxsubinterpreters Module ↵Eric Snow2022-12-051-3/+18
| | | | | | | (gh-99742) _xxsubinterpreters is an internal module used for testing. https://github.com/python/cpython/issues/99741
* gh-99741: Clean Up the _xxsubinterpreters Module (gh-99940)Eric Snow2022-12-021-1/+1
| | | | | This cleanup up resolves a few subtle bugs and makes the implementation for multi-phase init much cleaner. https://github.com/python/cpython/issues/99741
* gh-99741: Fix the Cross-Interpreter Data API (gh-99939)Eric Snow2022-12-021-0/+1
| | | | | There were some minor issues that showed up while I was working on porting _xxsubinterpreters to multi-phase init. This fixes them. https://github.com/python/cpython/issues/99741
* GH-91054: Add code object watchers API (GH-99859)Itamar Ostricher2022-12-021-0/+35
| | | | | | * Add API to allow extensions to set callback function on creation and destruction of PyCodeObject Co-authored-by: Ye11ow-Flash <janshah@cs.stonybrook.edu>
* gh-99845: PEP 670: Convert PyObject macros to functions (#99850)Victor Stinner2022-11-301-5/+8
| | | | | | | | | Convert macros to static inline functions to avoid macro pitfalls, like duplication of side effects: * _PyObject_SIZE() * _PyObject_VAR_SIZE() The result type is size_t (unsigned).
* Use _Py_RVALUE() in macros (#99844)Victor Stinner2022-11-281-1/+1
| | | | | | | | | | | | | | The following macros are modified to use _Py_RVALUE(), so they can no longer be used as l-value: * DK_LOG_SIZE() * _PyCode_CODE() * _PyList_ITEMS() * _PyTuple_ITEMS() * _Py_SLIST_HEAD() * _Py_SLIST_ITEM_NEXT() _PyCode_CODE() is private and other macros are part of the internal C API.
* gh-89653: PEP 670: Convert macros to functions (#99843)Victor Stinner2022-11-286-19/+56
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Convert macros to static inline functions to avoid macro pitfalls, like duplication of side effects: * DK_ENTRIES() * DK_UNICODE_ENTRIES() * PyCode_GetNumFree() * PyFloat_AS_DOUBLE() * PyInstanceMethod_GET_FUNCTION() * PyMemoryView_GET_BASE() * PyMemoryView_GET_BUFFER() * PyMethod_GET_FUNCTION() * PyMethod_GET_SELF() * PySet_GET_SIZE() * _PyHeapType_GET_MEMBERS() Changes: * PyCode_GetNumFree() casts PyCode_GetNumFree.co_nfreevars from int to Py_ssize_t to be future proof, and because Py_ssize_t is commonly used in the C API. * PyCode_GetNumFree() doesn't cast its argument: the replaced macro already required the exact type PyCodeObject*. * Add assertions in some functions using "CAST" macros to check the arguments type when Python is built with assertions (debug build). * Remove an outdated comment in unicodeobject.h.
* Revert "gh-98724: Fix Py_CLEAR() macro side effects" (#99737)Victor Stinner2022-11-241-24/+20
| | | | | Revert "gh-98724: Fix Py_CLEAR() macro side effects (#99100)" This reverts commit c03e05c2e72f3ea5e797389e7d1042eef85ad37a.
* gh-99706: unicodeobject: Fix padding in `PyASCIIObject.state` (GH-99707)David Hewitt2022-11-241-1/+1
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* gh-79315: Add Include/cpython/memoryobject.h header (#99723)Victor Stinner2022-11-231-0/+42
| | | | Move non-limited C API from Include/memoryobject.h to a new Include/cpython/memoryobject.h header file.
* gh-91053: Add an optional callback that is invoked whenever a function is ↵mpage2022-11-221-0/+49
| | | | modified (#98175)
* gh-81057: Move More Globals in Core Code to _PyRuntimeState (gh-99516)Eric Snow2022-11-161-2/+0
| | | https://github.com/python/cpython/issues/81057
* GH-99205: remove `_static` field from `PyThreadState` and ↵Kumar Aditya2022-11-151-3/+0
| | | | `PyInterpreterState` (GH-99385)
* gh-81057: Move PyImport_Inittab to _PyRuntimeState (gh-99402)Eric Snow2022-11-121-0/+1
| | | | | We actually don't move PyImport_Inittab. Instead, we make a copy that we keep on _PyRuntimeState and use only that after Py_Initialize(). We also prevent folks from modifying PyImport_Inittab (the best we can) after that point. https://github.com/python/cpython/issues/81057
* GH-90699: disallow `_Py_IDENTIFIER` in core code (GH-99210)Kumar Aditya2022-11-091-2/+2
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* gh-98724: Fix Py_CLEAR() macro side effects (#99100)Victor Stinner2022-11-091-20/+24
| | | | | | | The Py_CLEAR(), Py_SETREF() and Py_XSETREF() macros now only evaluate their argument once. If an argument has side effects, these side effects are no longer duplicated. Add test_py_clear() and test_py_setref() unit tests to _testcapi.
* gh-91248: Add PyFrame_GetVar() function (#95712)Victor Stinner2022-11-081-1/+2
| | | | | | Add PyFrame_GetVar() and PyFrame_GetVarString() functions to get a frame variable by its name. Move PyFrameObject C API tests from test_capi to test_frame.
* GH-98686: Quicken everything (GH-98687)Brandt Bucher2022-11-021-1/+0
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* gh-98610: Adjust the Optional Restrictions on Subinterpreters (GH-98618)Eric Snow2022-10-312-8/+19
| | | | | | | 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-98410: move getbufferproc and releasebufferproc to buffer.h (#31158)David Hewitt2022-10-311-4/+0
| | | This adds them to the Limited API.
* gh-98811: use full source location to simplify __future__ imports error ↵Irit Katriel2022-10-311-2/+17
| | | | checking. This also fixes an incorrect error offset. (GH-98812)
* gh-98783: Fix crashes when `str` subclasses are used in `_PyUnicode_Equal` ↵Nikita Sobolev2022-10-301-1/+1
| | | | (#98806)
* gh-98586: Add vector call APIs to the Limited API (GH-98587)Wenzel Jakob2022-10-271-13/+0
| | | Expose the facilities for making vector calls through Python's limited API.
* gh-98608: Change _Py_NewInterpreter() to _Py_NewInterpreterFromConfig() ↵Eric Snow2022-10-263-5/+44
| | | | | | | | | | | | | | | | | | | | | | | | | (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-91058: Add error suggestions to 'import from' import errors (#98305)Pablo Galindo Salgado2022-10-251-0/+8
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* gh-91051: allow setting a callback hook on PyType_Modified (GH-97875)Carl Meyer2022-10-211-0/+11
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* gh-95756: Lazily created cached co_* attrs (GH-97791)Ken Jin2022-10-111-1/+8
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* gh-91052: Add PyDict_Unwatch for unwatching a dictionary (#98055)Carl Meyer2022-10-081-0/+1
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* GH-91052: Add C API for watching dictionaries (GH-31787)Carl Meyer2022-10-071-0/+23
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* GH-91079: Decouple C stack overflow checks from Python recursion checks. ↵Mark Shannon2022-10-051-2/+14
| | | | (GH-96510)
* gh-96512: Move int_max_str_digits setting to PyConfig (#96944)Gregory P. Smith2022-10-031-0/+1
| | | | | | | | | | | It had to live as a global outside of PyConfig for stable ABI reasons in the pre-3.12 backports. This removes the `_Py_global_config_int_max_str_digits` and gets rid of the equivalent field in the internal `struct _is PyInterpreterState` as code can just use the existing nested config struct within that. Adds tests to verify unique settings and configs in subinterpreters.
* gh-96670: Raise SyntaxError when parsing NULL bytes (#97594)Pablo Galindo Salgado2022-09-271-0/+1
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* GH-91049: Introduce set vectorcall field API for PyFunctionObject (GH-92257)adphrost2022-09-151-1/+3
| | | | Co-authored-by: Andrew Frost <adfrost@fb.com> Co-authored-by: Itamar Ostricher <itamarost@gmail.com>
* gh-96143: Allow Linux perf profiler to see Python calls (GH-96123)Pablo Galindo Salgado2022-08-301-0/+1
| | | | | | | :warning: :warning: Note for reviewers, hackers and fellow systems/low-level/compiler engineers :warning: :warning: If you have a lot of experience with this kind of shenanigans and want to improve the **first** version, **please make a PR against my branch** or **reach out by email** or **suggest code changes directly on GitHub**. If you have any **refinements or optimizations** please, wait until the first version is merged before starting hacking or proposing those so we can keep this PR productive.
* GH-93503: Add thread-specific APIs to set profiling and tracing functions in ↵Pablo Galindo Salgado2022-08-241-0/+2
| | | | | | | | | | | | | | | | | the C-API (#93504) * gh-93503: Add APIs to set profiling and tracing functions in all threads in the C-API * Use a separate API * Fix NEWS entry * Add locks around the loop * Document ignoring exceptions * Use the new APIs in the sys module * Update docs
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