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* gh-116167: Allow disabling the GIL with `PYTHON_GIL=0` or `-X gil=0` (#116338)Brett Simmers2024-03-111-0/+3
| | | | | | | | | In free-threaded builds, running with `PYTHON_GIL=0` will now disable the GIL. Follow-up issues track work to re-enable the GIL when loading an incompatible extension, and to disable the GIL by default. In order to support re-enabling the GIL at runtime, all GIL-related data structures are initialized as usual, and disabling the GIL simply sets a flag that causes `take_gil()` and `drop_gil()` to return early.
* gh-111389: expose PyHASH_INF/BITS/MODULUS/IMAG macros as public (#111418)Sergey B Kirpichev2024-03-091-5/+11
| | | Co-authored-by: Victor Stinner <vstinner@python.org>
* chore: fix typos (#116345)cui fliter2024-03-051-1/+1
| | | Signed-off-by: cui fliter <imcusg@gmail.com>
* GH-115802: JIT "small" code for Windows (GH-115964)Brandt Bucher2024-02-291-3/+0
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* gh-115168: Add pystats counter for invalidated executors (GH-115169)Michael Droettboom2024-02-262-2/+3
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* gh-113706: Update comment about long int representation (#113707)Michael Droettboom2024-02-261-10/+21
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* gh-112075: Make PyDictKeysObject thread-safe (#114741)Dino Viehland2024-02-214-1/+53
| | | Adds locking for shared PyDictKeysObject's for dictionaries
* gh-112175: Add `eval_breaker` to `PyThreadState` (#115194)Brett Simmers2024-02-201-0/+5
| | | | | | | | | | | This change adds an `eval_breaker` field to `PyThreadState`. The primary motivation is for performance in free-threaded builds: with thread-local eval breakers, we can stop a specific thread (e.g., for an async exception) without interrupting other threads. The source of truth for the global instrumentation version is stored in the `instrumentation_version` field in PyInterpreterState. Threads usually read the version from their local `eval_breaker`, where it continues to be colocated with the eval breaker bits.
* GH-112354: Initial implementation of warm up on exits and trace-stitching ↵Mark Shannon2024-02-202-6/+21
| | | | (GH-114142)
* gh-115103: Implement delayed memory reclamation (QSBR) (#115180)Sam Gross2024-02-164-1/+57
| | | | | | This adds a safe memory reclamation scheme based on FreeBSD's "GUS" and quiescent state based reclamation (QSBR). The API provides a mechanism for callers to detect when it is safe to free memory that may be concurrently accessed by readers.
* gh-114271: Make `thread._rlock` thread-safe in free-threaded builds (#115102)mpage2024-02-164-0/+46
| | | | | | | | | The ID of the owning thread (`rlock_owner`) may be accessed by multiple threads without holding the underlying lock; relaxed atomics are used in place of the previous loads/stores. The number of times that the lock has been acquired (`rlock_count`) is only ever accessed by the thread that holds the lock; we do not need to use atomics to access it.
* gh-102013: Move PyUnstable_GC_VisitObjects() to Include/cpython/objimpl.h ↵Victor Stinner2024-02-161-0/+17
| | | | | | (#115560) Include/objimpl.h must only contain the limited C API, whereas PyUnstable_GC_VisitObjects() is excluded from the limited C API.
* gh-113743: Make the MRO cache thread-safe in free-threaded builds (#113930)Dino Viehland2024-02-154-0/+24
| | | | | | | Makes _PyType_Lookup thread safe, including: Thread safety of the underlying cache. Make mutation of mro and type members thread safe Also _PyType_GetMRO and _PyType_GetBases are currently returning borrowed references which aren't safe.
* gh-114570: Add PythonFinalizationError exception (#115352)Victor Stinner2024-02-141-0/+2
| | | | | | | | | | | | | | | | | Add PythonFinalizationError exception. This exception derived from RuntimeError is raised when an operation is blocked during the Python finalization. The following functions now raise PythonFinalizationError, instead of RuntimeError: * _thread.start_new_thread() * subprocess.Popen * os.fork() * os.fork1() * os.forkpty() Morever, _winapi.Overlapped finalizer now logs an unraisable PythonFinalizationError, instead of an unraisable RuntimeError.
* GH-113710: Backedge counter improvements. (GH-115166)Mark Shannon2024-02-131-3/+7
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* gh-114058: Foundations of the Tier2 redundancy eliminator (GH-115085)Ken Jin2024-02-131-0/+3
| | | | | | | --------- Co-authored-by: Mark Shannon <9448417+markshannon@users.noreply.github.com> Co-authored-by: Jules <57632293+JuliaPoo@users.noreply.github.com> Co-authored-by: Guido van Rossum <gvanrossum@users.noreply.github.com>
* gh-111140: Adds PyLong_AsNativeBytes and PyLong_FromNative[Unsigned]Bytes ↵Steve Dower2024-02-121-1/+35
| | | | functions (GH-114886)
* gh-110850: Add PyTime_t C API (GH-115215)Petr Viktorin2024-02-121-0/+23
| | | | | | | | | | | | * gh-110850: Add PyTime_t C API Add PyTime_t API: * PyTime_t type. * PyTime_MIN and PyTime_MAX constants. * PyTime_AsSecondsDouble(), PyTime_Monotonic(), PyTime_PerfCounter() and PyTime_GetSystemClock() functions. Co-authored-by: Victor Stinner <vstinner@python.org>
* GH-113710: Fix updating of dict version tag and add watched dict stats ↵Mark Shannon2024-02-121-0/+3
| | | | (GH-115221)
* GH-114695: Add `sys._clear_internal_caches` (GH-115152)Brandt Bucher2024-02-121-1/+2
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* gh-112066: Add `PyDict_SetDefaultRef` function. (#112123)Sam Gross2024-02-061-0/+10
| | | | | | | The `PyDict_SetDefaultRef` function is similar to `PyDict_SetDefault`, but returns a strong reference through the optional `**result` pointer instead of a borrowed reference. Co-authored-by: Petr Viktorin <encukou@gmail.com>
* GH-113462: Limit the number of versions that a single class can use. (GH-114900)Mark Shannon2024-02-051-0/+1
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* GH-113710: Add a "globals to constants" pass (GH-114592)Mark Shannon2024-02-022-1/+10
| | | Converts specializations of `LOAD_GLOBAL` into constants during tier 2 optimization.
* GH-113655 Lower C recursion limit from 4000 to 3000 on Windows. (GH-114896)Mark Shannon2024-02-021-1/+1
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* GH-113464: Add a JIT backend for tier 2 (GH-113465)Brandt Bucher2024-01-291-0/+2
| | | | | | | Add an option (--enable-experimental-jit for configure-based builds or --experimental-jit for PCbuild-based ones) to build an *experimental* just-in-time compiler, based on copy-and-patch (https://fredrikbk.com/publications/copy-and-patch.pdf). See Tools/jit/README.md for more information on how to install the required build-time tooling.
* gh-112087: Make list_repr and list_length to be thread-safe (gh-114582)Donghee Na2024-01-261-0/+4
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* gh-114312: Collect stats for unlikely events (GH-114493)Michael Droettboom2024-01-251-0/+14
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* GH-114456: lower the recursion limit under WASI for debug builds (GH-114457)Brett Cannon2024-01-231-4/+7
| | | Testing under wasmtime 16.0.0 w/ code from https://github.com/python/cpython/issues/114413 is how the value was found.
* gh-111964: Implement stop-the-world pauses (gh-112471)Sam Gross2024-01-231-1/+1
| | | | | | | | | | | | | | | | | The `--disable-gil` builds occasionally need to pause all but one thread. Some examples include: * Cyclic garbage collection, where this is often called a "stop the world event" * Before calling `fork()`, to ensure a consistent state for internal data structures * During interpreter shutdown, to ensure that daemon threads aren't accessing Python objects This adds the following functions to implement global and per-interpreter pauses: * `_PyEval_StopTheWorldAll()` and `_PyEval_StartTheWorldAll()` (for the global runtime) * `_PyEval_StopTheWorld()` and `_PyEval_StartTheWorld()` (per-interpreter) (The function names may change.) These functions are no-ops outside of the `--disable-gil` build.
* GH-113655: Lower the C recursion limit on various platforms (GH-113944)Mark Shannon2024-01-161-2/+6
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* GH-113860: Get rid of `_PyUOpExecutorObject` (GH-113954)Brandt Bucher2024-01-121-1/+8
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* GH-113853: Guarantee forward progress in executors (GH-113854)Mark Shannon2024-01-111-1/+1
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* GH-113860: All executors are now defined in terms of micro ops. Convert ↵Mark Shannon2024-01-101-2/+6
| | | | counter executor to use uops. (GH-113864)
* gh-113750: Fix object resurrection in free-threaded builds (gh-113751)Sam Gross2024-01-061-0/+1
| | | | | | | | | gh-113750: Fix object resurrection on free-threaded builds This avoids the undesired re-initializing of fields like `ob_gc_bits`, `ob_mutex`, and `ob_tid` when an object is resurrected due to its finalizer being called. This change has no effect on the default (with GIL) build.
* GH-113486: Do not emit spurious PY_UNWIND events for optimized calls to ↵Mark Shannon2024-01-051-0/+2
| | | | classes. (GH-113680)
* gh-111971: Make _PyUnicode_FromId thread-safe in --disable-gil (gh-113489)Donghee Na2023-12-261-0/+4
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* GH-112215: Increase C recursion limit for non debug builds (GH-113397)Mark Shannon2023-12-221-1/+3
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* gh-112320: Implement on-trace confidence tracking for branches (#112321)Guido van Rossum2023-12-121-0/+1
| | | We track the confidence as a scaled int.
* GH-108866: Guarantee forward progress in executors. (GH-113006)Mark Shannon2023-12-121-1/+1
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* gh-111545: Add Py_HashPointer() function (#112096)Victor Stinner2023-12-061-1/+5
| | | | | * Implement _Py_HashPointerRaw() as a static inline function. * Add Py_HashPointer() tests to test_capi.test_hash. * Keep _Py_HashPointer() function as an alias to Py_HashPointer().
* gh-106560: Fix redundant declarations in Include/ (#112611)Victor Stinner2023-12-031-4/+0
| | | | | | Don't declare PyBool_Type, PyLong_Type and PySys_Audit() twice, but only once. Compiler warnings seen by building Python with gcc -Wredundant-decls.
* gh-111863: Rename `Py_NOGIL` to `Py_GIL_DISABLED` (#111864)Hugo van Kemenade2023-11-201-1/+1
| | | Rename Py_NOGIL to Py_GIL_DISABLED
* gh-111798: Use lower Py_C_RECURSION_LIMIT in debug mode (#112124)Victor Stinner2023-11-161-1/+5
| | | | | | | * Run again test_ast_recursion_limit() on WASI platform. * Add _testinternalcapi.get_c_recursion_remaining(). * Fix test_ast and test_sys_settrace: test_ast_recursion_limit() and test_trace_unpack_long_sequence() now adjust the maximum recursion depth depending on the the remaining C recursion.
* gh-112026: Add again _PyThreadState_UncheckedGet() function (#112121)Victor Stinner2023-11-151-0/+3
| | | | Add again the private _PyThreadState_UncheckedGet() function as an alias to the new public PyThreadState_GetUnchecked() function.
* gh-112026: Restore removed _PyDict_GetItemStringWithError() (#112119)Victor Stinner2023-11-151-1/+1
| | | | Restore the removed _PyDict_GetItemStringWithError() function. It is used by numpy.
* gh-112026: Restore removed private C API (#112115)Victor Stinner2023-11-159-0/+260
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Restore removed private C API functions, macros and structures which have no simple replacement for now: * _PyDict_GetItem_KnownHash() * _PyDict_NewPresized() * _PyHASH_BITS * _PyHASH_IMAG * _PyHASH_INF * _PyHASH_MODULUS * _PyHASH_MULTIPLIER * _PyLong_Copy() * _PyLong_FromDigits() * _PyLong_New() * _PyLong_Sign() * _PyObject_CallMethodId() * _PyObject_CallMethodNoArgs() * _PyObject_CallMethodOneArg() * _PyObject_CallOneArg() * _PyObject_EXTRA_INIT * _PyObject_FastCallDict() * _PyObject_GetAttrId() * _PyObject_Vectorcall() * _PyObject_VectorcallMethod() * _PyStack_AsDict() * _PyThread_CurrentFrames() * _PyUnicodeWriter structure * _PyUnicodeWriter_Dealloc() * _PyUnicodeWriter_Finish() * _PyUnicodeWriter_Init() * _PyUnicodeWriter_Prepare() * _PyUnicodeWriter_PrepareKind() * _PyUnicodeWriter_WriteASCIIString() * _PyUnicodeWriter_WriteChar() * _PyUnicodeWriter_WriteLatin1String() * _PyUnicodeWriter_WriteStr() * _PyUnicodeWriter_WriteSubstring() * _PyUnicode_AsString() * _PyUnicode_FromId() * _PyVectorcall_Function() * _Py_HashDouble() * _Py_HashPointer() * _Py_IDENTIFIER() * _Py_c_abs() * _Py_c_diff() * _Py_c_neg() * _Py_c_pow() * _Py_c_prod() * _Py_c_quot() * _Py_c_sum() * _Py_static_string() * _Py_static_string_init()
* gh-111545: Add Include/cpython/pyhash.h header file (#112063)Victor Stinner2023-11-151-0/+13
| | | Move non-limited C API to a new Include/cpython/pyhash.h header file.
* gh-111262: Add PyDict_Pop() function (#112028)Victor Stinner2023-11-141-0/+2
| | | | | | | _PyDict_Pop_KnownHash(): remove the default value and the return type becomes an int. Co-authored-by: Stefan Behnel <stefan_ml@behnel.de> Co-authored-by: Antoine Pitrou <pitrou@free.fr>
* gh-107149: make new opcode util functions private rather than public and ↵Irit Katriel2023-11-141-12/+0
| | | | unstable (#112042)
* gh-111138: Add PyList_Extend() and PyList_Clear() functions (#111862)Victor Stinner2023-11-131-0/+3
| | | | | | * Split list_extend() into two sub-functions: list_extend_fast() and list_extend_iter(). * list_inplace_concat() no longer has to call Py_DECREF() on the list_extend() result, since list_extend() now returns an int.
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