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* bpo-46968: Check for 'sys/auxv.h' in the configure script (GH-31961)Pablo Galindo Salgado2022-03-181-0/+3
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* bpo-46968: Fix faulthandler for Sapphire Rapids Xeon (GH-31789)Oleksandr Pavlyk2022-03-111-0/+3
| | | | | | | | | | | In Linux kernel 5.14 one can dynamically request size of altstacksize based on hardware capabilities with getauxval(AT_MINSIGSTKSZ). This changes allows for Python extension's request to Linux kernel to use AMX_TILE instruction set on Sapphire Rapids Xeon processor to succeed, unblocking use of the ISA in frameworks. Introduced HAVE_LINUX_AUXVEC_H in configure.ac and pyconfig.h.in Used cpython_autoconf:269 docker container to generate configure.
* bpo-46933: Make pwd module optional (GH-31700)Christian Heimes2022-03-071-0/+3
| | | Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>
* bpo-40280: Address more test failures on Emscripten (GH-31050)Christian Heimes2022-02-051-0/+3
| | | Co-authored-by: Brett Cannon <brett@python.org>
* bpo-46513: Remove AC_C_CHAR_UNSIGNED / __CHAR_UNSIGNED__ (GH-30851)Christian Heimes2022-01-261-5/+0
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* bpo-30512: Add CAN Socket support for NetBSD (GH-30066)Thomas Klausner2022-01-211-0/+3
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* bpo-46315: Add ifdef HAVE_ feature checks for WASI compatibility (GH-30507)Christian Heimes2022-01-131-0/+12
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* bpo-45723: Fix detection of epoll (#30449)Christian Heimes2022-01-071-1/+1
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* bpo-46072: Add --with-pystats configure option to simplify gathering of VM ↵Mark Shannon2021-12-151-0/+3
| | | | | | | | | stats (GH-30116) * Simplify specialization stats collection macros. * Add --enable-pystats option to configure. * Update specialization summary script to handle larger number of kinds
* bpo-45847: Revert Port _ctypes partly to PY_STDLIB_MOD (GH-29747) (GH-29969)Christian Heimes2021-12-071-12/+0
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* bpo-45847: Port _ctypes partly to PY_STDLIB_MOD (GH-29747)Christian Heimes2021-12-041-0/+12
| | | Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>
* bpo-45847: Make socket module conditional (GH-29769)Erlend Egeberg Aasland2021-11-291-0/+3
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* bpo-40280: Move hard-coded feature checks to configure (GH-29789)Christian Heimes2021-11-261-0/+33
| | | Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>
* bpo-40280: Add configure check for socket shutdown (GH-29795)Christian Heimes2021-11-261-0/+3
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* bpo-45847: Port _uuid to PY_STDLIB_MOD (GH-29741)Christian Heimes2021-11-241-3/+0
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* bpo-45847: Port _posixshmem to PY_STDLIB_MOD (GH-29738)Erlend Egeberg Aasland2021-11-241-3/+0
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* bpo-45847: Port _gdbm to PY_STDLIB_MOD (GH-29720)Christian Heimes2021-11-231-3/+0
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* bpo-45847: Port nis module to PY_STDLIB_MOD (GH-29699)Christian Heimes2021-11-221-0/+3
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* bpo-45847: Port compression libs to PY_STDLIB_MOD (GH-29702)Christian Heimes2021-11-221-9/+0
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* bpo-45847: Port fcntl to Py_STDLIB_MOD (GH-29696)Erlend Egeberg Aasland2021-11-221-3/+0
| | | Co-authored-by: Christian Heimes <christian@python.org>
* bpo-45847: Port grp, spwd, termios, resource, syslog to PY_STDLIB_MOD (GH-29668)Christian Heimes2021-11-211-0/+6
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* bpo-45774: Fix SQLite load extension autodetection (GH-29659)Erlend Egeberg Aasland2021-11-201-3/+0
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* bpo-45774: Autoconfiscate SQLite detection (GH-29507)Erlend Egeberg Aasland2021-11-191-0/+3
| | | Co-authored-by: Christian Heimes <christian@python.org>
* bpo-45573: check for ossaudiodev in configure (GH-29614)Christian Heimes2021-11-181-0/+6
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* bpo-45747: Detect gdbm/dbm dependencies in configure (GH-29467)Christian Heimes2021-11-101-0/+27
| | | Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>
* bpo-45763: Detect compression build deps in configure (GH-29483)Christian Heimes2021-11-091-0/+18
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* bpo-45723: Prepare support for autoconf 2.71 (GH-29441)Christian Heimes2021-11-081-3/+0
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* bpo-45723: Add helper macros and more caching to configure.ac (GH-29429)Christian Heimes2021-11-081-7/+7
| | | | | | | | | | | | | | | | | Almost all checks are now cached by AC_CACHE_CHECK(). Common patterns are replaced by helper macros. Variable names now use naming scheme ``ac_cv_func_$funcname``, ``ac_cv_lib_$library_$funcname``, or ``ac_cv_header_$headername_h``. ``SYS_SELECT_WITH_SYS_TIME`` is no longer used. ``uuid_create`` and ``uuid_enc_be`` are provided by libc on BSD. It is safe to use ``AC_CHECK_FUNCS`` here. Caching speeds up ./configure -C from ~ 4s to 2.6s on my system. Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>
* bpo-45731: Handle --enable-loadable-sqlite-extensions in configure (GH-29434)Christian Heimes2021-11-061-0/+3
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* bpo-43158: Regenerate configure again (GH-29433)Christian Heimes2021-11-051-1/+1
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* bpo-43158: Use configure values for building _uuid extension (GH-29353)Christian Heimes2021-11-021-0/+3
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* bpo-45548: Remove checks for finite and gamma (GH-29206)Christian Heimes2021-10-251-12/+0
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* bpo-45522: Allow to disable freelists on build time (GH-29056)Christian Heimes2021-10-211-0/+3
| | | | | | | | Freelists for object structs can now be disabled. A new ``configure`` option ``--without-freelists`` can be used to disable all freelists except empty tuple singleton. Internal Py*_MAXFREELIST macros can now be defined as 0 without causing compiler warnings and segfaults. Signed-off-by: Christian Heimes <christian@python.org>
* bpo-45440: Remove pymath.c fallbacks (GH-28977)Victor Stinner2021-10-151-9/+0
| | | | | | | | Remove fallbacks for missing round(), copysign() and hypot() in Python/pymath.c. Python now requires these functions to build. These fallbacks were needed on Visual Studio 2012 and older. They are no longer needed since Visual Stuido 2013. Python is now built with Visual Studio 2017 or newer since Python 3.6.
* bpo-45440: Require math.h isinf() to build (GH-28894)Victor Stinner2021-10-131-12/+0
| | | | | | | | | | | | | | | Building Python now requires a C99 <math.h> header file providing isinf(), isnan() and isfinite() functions. Remove the Py_FORCE_DOUBLE() macro. It was used by the Py_IS_INFINITY() macro. Changes: * Remove Py_IS_NAN(), Py_IS_INFINITY() and Py_IS_FINITE() in PC/pyconfig.h. * Remove the _Py_force_double() function. * configure no longer checks if math.h defines isinf(), isnan() and isfinite().
* bpo-29410: Change the default hash algorithm to SipHash13. (GH-28752)Inada Naoki2021-10-101-1/+1
| | | | Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no> Co-authored-by: Christian Heimes <christian@python.org>
* bpo-41710: PyThread_acquire_lock_timed() uses sem_clockwait() (GH-28662)Victor Stinner2021-10-011-3/+6
| | | | | | | | | On Unix, if the sem_clockwait() function is available in the C library (glibc 2.30 and newer), the threading.Lock.acquire() method now uses the monotonic clock (time.CLOCK_MONOTONIC) for the timeout, rather than using the system clock (time.CLOCK_REALTIME), to not be affected by system clock changes. configure now checks if the sem_clockwait() function is available.
* bpo-21302: Add nanosleep() implementation for time.sleep() in Unix (GH-28545)Victor Stinner2021-09-251-0/+3
| | | Co-authored-by: Livius <egyszeregy@freemail.hu>
* bpo-21302: Add clock_nanosleep() implementation for time.sleep() (GH-28111)Livius2021-09-131-0/+3
| | | | | | In Unix operating systems, time.sleep() now uses the clock_nanosleep() function, if available, which allows to sleep for an interval specified with nanosecond precision. Co-authored-by: Victor Stinner <vstinner@python.org>
* bpo-34602: Quadruple stack size on macOS when compiling with UBSAN (GH-27309)Łukasz Langa2021-09-031-0/+3
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* bpo-43667: Fix broken Unicode encoding in non-UTF locales on Solaris (GH-25096)Jakub Kulík2021-04-301-0/+4
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* bpo-43669: PEP 644: Require OpenSSL 1.1.1 or newer (GH-23014)Christian Heimes2021-04-171-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | - Remove HAVE_X509_VERIFY_PARAM_SET1_HOST check - Update hashopenssl to require OpenSSL 1.1.1 - multissltests only OpenSSL > 1.1.0 - ALPN is always supported - SNI is always supported - Remove deprecated NPN code. Python wrappers are no-op. - ECDH is always supported - Remove OPENSSL_VERSION_1_1 macro - Remove locking callbacks - Drop PY_OPENSSL_1_1_API macro - Drop HAVE_SSL_CTX_CLEAR_OPTIONS macro - SSL_CTRL_GET_MAX_PROTO_VERSION is always defined now - security level is always available now - get_num_tickets is available with TLS 1.3 - X509_V_ERR MISMATCH is always available now - Always set SSL_MODE_RELEASE_BUFFERS - X509_V_FLAG_TRUSTED_FIRST is always available - get_ciphers is always supported - SSL_CTX_set_keylog_callback is always available - Update Modules/Setup with static link example - Mention PEP in whatsnew - Drop 1.0.2 and 1.1.0 from GHA tests
* bpo-43179: Generalise alignment for optimised string routines (GH-24624)Jessica Clarke2021-03-311-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | * Remove m68k-specific hack from ascii_decode On m68k, alignments of primitives is more relaxed, with 4-byte and 8-byte types only requiring 2-byte alignment, thus using sizeof(size_t) does not work. Instead, use the portable alternative. Note that this is a minimal fix that only relaxes the assertion and the condition for when to use the optimised version remains overly strict. Such issues will be fixed tree-wide in the next commit. NB: In C11 we could use _Alignof(size_t) instead, but for compatibility we use autoconf. * Optimise string routines for architectures with non-natural alignment C only requires that sizeof(x) is a multiple of alignof(x), not that the two are equal. Thus anywhere where we optimise based on alignment we should be using alignof(x) not sizeof(x). This is more annoying than it would be in C11 where we could just use _Alignof(x) (and alignof(x) in C++11), but since we still require only C99 we must plumb the information all the way from autoconf through the various typedefs and defines.
* bpo-13501: allow choosing between readline and libedit (GH-24189)Roland Hieber2021-02-091-1/+4
| | | | | | | | | | | | | | | | | | | | | | | In contrast to macOS, libedit is available as its own include file and library on Linux systems to prevent file name clashes. So if both libraries are available on the system, readline is currently chosen by default; and if only libedit is available, it is not found at all. This patch adds a way to link against libedit by adding the following arguments to configure: --with-readline link against libreadline (the default) --with-readline=editline link against libeditline --with-readline=no disable building the readline module --without-readline (same) The runtime detection of libedit vs. readline was already done in commit 7105319ada2e66365902 (2019-12-04, serge-sans-paille: "bpo-38634: Allow non-apple build to cope with libedit (GH-16986)"). Fixes: GH-12076 ("bpo-13501 Build or disable readline with Editline") Fixes: bpo-13501 ("Make libedit support more generic; port readline / libedit to FreeBSD") Co-authored-by: Enji Cooper (ngie-eign) Co-authored-by: Martin Panter (vadmium) Co-authored-by: Robert Marshall (kellinm)
* bpo-39465: Add pycore_atomic_funcs.h header (GH-20766)Victor Stinner2020-12-231-4/+4
| | | | | | Add pycore_atomic_funcs.h internal header file: similar to pycore_atomic.h but don't require to declare variables as atomic. Add _Py_atomic_size_get() and _Py_atomic_size_set() functions.
* bpo-41625: Expose the splice() system call in the os module (GH-21947)Pablo Galindo2020-11-171-0/+3
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* bpo-41001: Add os.eventfd() (#20930)Christian Heimes2020-11-131-0/+6
| | | Co-authored-by: Kyle Stanley <aeros167@gmail.com>
* bpo-41100: Support macOS 11 and Apple Silicon (GH-22855)Ronald Oussoren2020-11-081-0/+3
| | | | | | | | | | | Co-authored-by: Lawrence D’Anna <lawrence_danna@apple.com> * Add support for macOS 11 and Apple Silicon (aka arm64) As a side effect of this work use the system copy of libffi on macOS, and remove the vendored copy * Support building on recent versions of macOS while deploying to older versions This allows building installers on macOS 11 while still supporting macOS 10.9.
* bpo-35823: subprocess: Use vfork() instead of fork() on Linux when safe ↵Alexey Izbyshev2020-10-241-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | (GH-11671) * bpo-35823: subprocess: Use vfork() instead of fork() on Linux when safe When used to run a new executable image, fork() is not a good choice for process creation, especially if the parent has a large working set: fork() needs to copy page tables, which is slow, and may fail on systems where overcommit is disabled, despite that the child is not going to touch most of its address space. Currently, subprocess is capable of using posix_spawn() instead, which normally provides much better performance. However, posix_spawn() does not support many of child setup operations exposed by subprocess.Popen(). Most notably, it's not possible to express `close_fds=True`, which happens to be the default, via posix_spawn(). As a result, most users can't benefit from faster process creation, at least not without changing their code. However, Linux provides vfork() system call, which creates a new process without copying the address space of the parent, and which is actually used by C libraries to efficiently implement posix_spawn(). Due to sharing of the address space and even the stack with the parent, extreme care is required to use vfork(). At least the following restrictions must hold: * No signal handlers must execute in the child process. Otherwise, they might clobber memory shared with the parent, potentially confusing it. * Any library function called after vfork() in the child must be async-signal-safe (as for fork()), but it must also not interact with any library state in a way that might break due to address space sharing and/or lack of any preparations performed by libraries on normal fork(). POSIX.1 permits to call only execve() and _exit(), and later revisions remove vfork() specification entirely. In practice, however, almost all operations needed by subprocess.Popen() can be safely implemented on Linux. * Due to sharing of the stack with the parent, the child must be careful not to clobber local variables that are alive across vfork() call. Compilers are normally aware of this and take extra care with vfork() (and setjmp(), which has a similar problem). * In case the parent is privileged, special attention must be paid to vfork() use, because sharing an address space across different privilege domains is insecure[1]. This patch adds support for using vfork() instead of fork() on Linux when it's possible to do safely given the above. In particular: * vfork() is not used if credential switch is requested. The reverse case (simple subprocess.Popen() but another application thread switches credentials concurrently) is not possible for pure-Python apps because subprocess.Popen() and functions like os.setuid() are mutually excluded via GIL. We might also consider to add a way to opt-out of vfork() (and posix_spawn() on platforms where it might be implemented via vfork()) in a future PR. * vfork() is not used if `preexec_fn != None`. With this change, subprocess will still use posix_spawn() if possible, but will fallback to vfork() on Linux in most cases, and, failing that, to fork(). [1] https://ewontfix.com/7 Co-authored-by: Gregory P. Smith [Google LLC] <gps@google.com>
* bpo-40423: Optimization: use close_range(2) if available (GH-22651)Kyle Evans2020-10-111-0/+3
| | | | | | | close_range(2) should be preferred at all times if it's available, otherwise we'll use closefrom(2) if available with a fallback to fdwalk(3) or plain old loop over fd range in order of most efficient to least. [note that this version does check for ENOSYS, but currently ignores all other errors] Automerge-Triggered-By: @pablogsal
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