Without this, OpenSSL that we use to download external dependencies might use a stale certificate store and be unable to connect to servers. We need to use a Windows-specific HTTP client that uses CryptoAPI directly to trigger certificate updates.
We only do it on failure to avoid hitting servers twice. And we only do it once per each URL.
This PR implements frame caching in the RemoteUnwinder class to significantly reduce memory reads when profiling remote processes with deep call stacks.
When cache_frames=True, the unwinder stores the frame chain from each sample and reuses unchanged portions in subsequent samples. Since most profiling samples capture similar call stacks (especially the parent frames), this optimization avoids repeatedly reading the same frame data from the target process.
The implementation adds a last_profiled_frame field to the thread state that tracks where the previous sample stopped. On the next sample, if the current frame chain reaches this marker, the cached frames from that point onward are reused instead of being re-read from remote memory.
The sampling profiler now enables frame caching by default.
Allow the --enable-pystats build option to be used with free-threading. The
stats are now stored on a per-interpreter basis, rather than process global.
For free-threaded builds, the stats structure is allocated per-thread and
then periodically merged into the per-interpreter stats structure (on thread
exit or when the reporting function is called). Most of the pystats related
code has be moved into the file Python/pystats.c.
Move the public PyUnicodeWriter API and the private _PyUnicodeWriter
API to a new Objects/unicode_writer.c file.
Rename a few helper functions to share them between unicodeobject.c
and unicode_writer.c, such as resize_compact() or unicode_result().
Expose `_PyUnicode_IsXidContinue/Start` in `unicodedata`:
add isxidstart() and isxidcontinue() functions.
Co-authored-by: Victor Stinner <vstinner@python.org>
* Move PyUnicode_Format() implementation from unicodeobject.c
to unicode_format.c.
* Replace unicode_modifiable() with _PyUnicode_IsModifiable()
* Add empty lines to have two empty lines between functions.
* Move Python/formatter_unicode.c to Objects/unicode_formatter.c.
* Move Objects/stringlib/localeutil.h content into
unicode_formatter.c. Remove localeutil.h.
* Move _PyUnicode_InsertThousandsGrouping() to unicode_formatter.c
and mark the function as static.
* Rename unicode_fill() to _PyUnicode_Fill() and export it in
pycore_unicodeobject.h.
* Move MAX_UNICODE to pycore_unicodeobject.h as _Py_MAX_UNICODE.
* Update SQLite to 3.50.3 for binary releases.
* macOS and Windows news entries. what about Android?
* update sbom hash
* newline fix via regen-sbom
* news wording
* Update SQLite to 3.50.4 for binary releases.
* update 3.50.4.0.tar.gz hash in sbom & regen-sbom to fix whitespace
* Postpone to a separate PR the build-installer changes to support additional hash types
Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Ned Deily <nad@python.org>
The `Modules/hashlib.h` helper file is now removed and split into multiple files:
* `Modules/_hashlib/hashlib_buffer.[ch]` -- Utilities for getting a buffer view and handling buffer inputs.
* `Modules/_hashlib/hashlib_fetch.h` -- Utilities used when fetching a message digest from a digest-like identifier.
Currently, this file only contains common error messages as the fetching API is not yet implemented.
* `Modules/_hashlib/hashlib_mutex.h` -- Utilities for managing the lock on cryptographic hash objects.
Sergey Miryanov