Add support for disabling the use of `posix_spawn` via a variable in
the process environment.
While it was previously possible to toggle this by modifying the value
of `subprocess._USE_POSIX_SPAWN`, this required either patching CPython
or modifying it within the interpreter instance which is not always
possible, such as when running applications or scripts not under a
user's control.
Signed-off-by: Vincent Fazio <vfazio@gmail.com>
* fixup NEWS entry
Docs: Add a single table summary for ``cmath`` (#131887)
Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com> Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com> Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com> Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
gh-85162: Add `HTTPSServer` to `http.server` to serve files over HTTPS (#129607)
The `http.server` module now supports serving over HTTPS using the `http.server.HTTPSServer` class.
This functionality is also exposed by the command-line interface (`python -m http.server`) through the
`--tls-cert`, `--tls-key` and `--tls-password-file` options.
A new extension module, `_hmac`, now exposes the HACL* HMAC (formally verified) implementation.
The HACL* implementation is used as a fallback implementation when the OpenSSL implementation of HMAC
is not available or disabled. For now, only named hash algorithms are recognized and SIMD support provided
by HACL* for the BLAKE2 hash functions is not yet used.
gh-118761: Lazily import annotationlib in typing (#132060)
annotationlib is used quite a few times in typing.py, but I think the
usages are just rare enough that this makes sense.
The import would get triggered by:
- Using get_type_hints(), evaluate_forward_ref(), and similar introspection
functions
- Using a string annotation anywhere that goes through _type_convert (e.g.,
"Final['x']" will trigger an annotationlib import in order to access the
ForwardRef class).
- Creating a TypedDict or NamedTuple (unless it's empty or PEP 563 is on).
Lots of programs will want to use typing without any of these, so the tradeoff
seems worth it.
gh-131938: Update exception message for `Element.remove()` when an element is not found (#131972)
The exception message for `xml.etree.ElementTree.Element.remove` when an element is not found
has been updated from "list.remove(x): x not in list" to "Element.remove(x): element not found".
Vincent Fazio [Fri, 4 Apr 2025 14:31:37 +0000 (09:31 -0500)]
gh-130115: fix thread identifiers for 32-bit musl (#130391)
CPython's pthread-based thread identifier relies on pthread_t being able
to be represented as an unsigned integer type.
This is true in most Linux libc implementations where it's defined as an
unsigned long, however musl typedefs it as a struct *.
If the pointer has the high bit set and is cast to PyThread_ident_t, the
resultant value can be sign-extended [0]. This can cause issues when
comparing against threading._MainThread's identifier. The main thread's
identifier value is retrieved via _get_main_thread_ident which is backed
by an unsigned long which truncates sign extended bits.
Work around this by conditionally compiling in some code for non-glibc
based Linux platforms that are at risk of sign-extension to return a
PyLong based on the main thread's unsigned long thread identifier if the
current thread is the main thread.
gh-128661: Remove DeprecationWarning in evaluate_forward_ref (#128930)
It doesn't make sense to use a deprecation for evaluate_forward_ref,
as it is a new function in Python 3.14 and doesn't have compatibility
guarantees.
I considered making it throw an error if type_params it not passed and
there is no owner. However, I think this is too unfriendly for users. The
case where this param is really needed is fairly esoteric and I don't think
this case is worth the pain of forcing users to write "type_params=()".
Optimize `LOAD_FAST` opcodes into faster versions that load borrowed references onto the operand stack when we can prove that the lifetime of the local outlives the lifetime of the temporary that is loaded onto the stack.
Don't pass direct references to sockaddr members since their type may
not match PyArg_ParseTuple() types. Instead, use temporary 'int' and
'unsigned char' variables, and update sockaddr members afterwards.
On FreeBSD, treat BTPROTO_HCI node name as a bytes string,
not as an integer.
Vincent Fazio [Mon, 31 Mar 2025 18:29:12 +0000 (13:29 -0500)]
gh-131675: Fix `mi_atomic_yield` in mimalloc on 32-bit ARM (gh-131784)
Use the standard `__ARM_ARCH` macro, which is supported by GCC and Clang.
The branching logic for of `__ARMEL__` has been removed so if the target
architecture supports v7+ instructions, a yield is emitted, otherwise a nop
is emitted. This covers both big and little endian scenarios.
stratakis [Mon, 31 Mar 2025 17:53:49 +0000 (19:53 +0200)]
gh-131865: Properly apply exported CFLAGS for dtrace/systemtap builds (#131866)
When using --with-dtrace the resulting object file could be missing
specific CFLAGS exported by the build system due to the systemtap
script using specific defaults.
Exporting the CC and CFLAGS variables before the dtrace invocation
allows us to properly apply CFLAGS exported by the build system
even when cross-compiling.
The fix does not affect the dtrace invocation on Solaris/macOS.
projects / thirdparty / Python / cpython.git / log
