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* 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.
* GH-111843: Tier 2 exponential backoff (GH-111850)Mark Shannon2023-11-091-0/+4
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* gh-111569: Implement Python critical section API (gh-111571)Sam Gross2023-11-081-0/+7
| | | | | | | | Critical sections are helpers to replace the global interpreter lock with finer grained locking. They provide similar guarantees to the GIL and avoid the deadlock risk that plain locking involves. Critical sections are implicitly ended whenever the GIL would be released. They are resumed when the GIL would be acquired. Nested critical sections behave as if the sections were interleaved.
* gh-111089: Revert PyUnicode_AsUTF8() changes (#111833)Victor Stinner2023-11-071-0/+16
| | | | | | | | | | | | | | | | | | | | | * Revert "gh-111089: Use PyUnicode_AsUTF8() in Argument Clinic (#111585)" This reverts commit d9b606b3d04fc56fb0bcc479d7d6c14562edb5e2. * Revert "gh-111089: Use PyUnicode_AsUTF8() in getargs.c (#111620)" This reverts commit cde1071b2a72e8261ca66053ef61431b7f3a81fd. * Revert "gh-111089: PyUnicode_AsUTF8() now raises on embedded NUL (#111091)" This reverts commit d731579bfb9a497cfb0076cb6b221058a20088fe. * Revert "gh-111089: Add PyUnicode_AsUTF8() to the limited C API (#111121)" This reverts commit d8f32be5b6a736dc2fc9dca3f1bf176c82fc9b44. * Revert "gh-111089: Use PyUnicode_AsUTF8() in sqlite3 (#111122)" This reverts commit 37e4e20eaa8f27ada926d49e5971fecf0477ad26.
* GH-110829: Ensure Thread.join() joins the OS thread (#110848)Antoine Pitrou2023-11-041-0/+1
| | | | | | | Joining a thread now ensures the underlying OS thread has exited. This is required for safer fork() in multi-threaded processes. --------- Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
* gh-108082: Add PyErr_FormatUnraisable() function (GH-111086)Serhiy Storchaka2023-10-311-0/+2
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* gh-109329: Count tier2 opcode misses (#110561)Michael Droettboom2023-10-311-0/+1
| | | This keeps a separate 'miss' counter for each micro-opcode, incremented whenever a guard uop takes a deoptimization side exit.
* gh-76785: Move the Cross-Interpreter Code to Its Own File (gh-111502)Eric Snow2023-10-301-77/+0
| | | This is partly to clear this stuff out of pystate.c, but also in preparation for moving some code out of _xxsubinterpretersmodule.c. This change also moves this stuff to the internal API (new: Include/internal/pycore_crossinterp.h). @vstinner did this previously and I undid it. Now I'm re-doing it. :/
* gh-90815: Add mimalloc memory allocator (#109914)Dino Viehland2023-10-301-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Add mimalloc v2.12 Modified src/alloc.c to remove include of alloc-override.c and not compile new handler. Did not include the following files: - include/mimalloc-new-delete.h - include/mimalloc-override.h - src/alloc-override-osx.c - src/alloc-override.c - src/static.c - src/region.c mimalloc is thread safe and shares a single heap across all runtimes, therefore finalization and getting global allocated blocks across all runtimes is different. * mimalloc: minimal changes for use in Python: - remove debug spam for freeing large allocations - use same bytes (0xDD) for freed allocations in CPython and mimalloc This is important for the test_capi debug memory tests * Don't export mimalloc symbol in libpython. * Enable mimalloc as Python allocator option. * Add mimalloc MIT license. * Log mimalloc in Lib/test/pythoninfo.py. * Document new mimalloc support. * Use macro defs for exports as done in: https://github.com/python/cpython/pull/31164/ Co-authored-by: Sam Gross <colesbury@gmail.com> Co-authored-by: Christian Heimes <christian@python.org> Co-authored-by: Victor Stinner <vstinner@python.org>
* gh-106168: Check allocated instead of size index bounds in PyList_SET_ITEM() ↵scoder2023-10-301-1/+1
| | | | | (#111480) Check the index bound assertions in PyList_SET_ITEM() against [0:allocated] instead of [0:size] to re-allow valid use cases that assign within the allocated area.
* gh-109587: Allow "precompiled" perf-trampolines to largely mitigate the cost ↵gsallam2023-10-271-0/+3
| | | | of enabling perf-trampolines (#109666)
* gh-106320: Re-add some PyLong/PyDict C-API functions (GH-#111162)scoder2023-10-252-0/+43
| | | | | | | | * gh-106320: Re-add _PyLong_FromByteArray(), _PyLong_AsByteArray() and _PyLong_GCD() to the public header files since they are used by third-party packages and there is no efficient replacement. See https://github.com/python/cpython/issues/111140 See https://github.com/python/cpython/issues/111139 * gh-111262: Re-add _PyDict_Pop() to have a C-API until a new public one is designed.
* GH-109369: Add machinery for deoptimizing tier2 executors, both individually ↵Mark Shannon2023-10-231-0/+26
| | | | and globally. (GH-110384)
* gh-111089: Add PyUnicode_AsUTF8() to the limited C API (#111121)Victor Stinner2023-10-201-13/+0
| | | | | | | | Add PyUnicode_AsUTF8() function to the limited C API. multiprocessing posixshmem now uses PyUnicode_AsUTF8() instead of PyUnicode_AsUTF8AndSize(): the extension is built with the limited C API. The function now raises an exception if the filename contains an embedded null character instead of truncating silently the filename.
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