cpython/Modules/_sqlite
Petr Viktorin 6f1d448bc1
gh-113993: Allow interned strings to be mortal, and fix related issues (GH-120520)
* Add an InternalDocs file describing how interning should work and how to use it.

* Add internal functions to *explicitly* request what kind of interning is done:
  - `_PyUnicode_InternMortal`
  - `_PyUnicode_InternImmortal`
  - `_PyUnicode_InternStatic`

* Switch uses of `PyUnicode_InternInPlace` to those.

* Disallow using `_Py_SetImmortal` on strings directly.
  You should use `_PyUnicode_InternImmortal` instead:
  - Strings should be interned before immortalization, otherwise you're possibly
    interning a immortalizing copy.
  - `_Py_SetImmortal` doesn't handle the `SSTATE_INTERNED_MORTAL` to
    `SSTATE_INTERNED_IMMORTAL` update, and those flags can't be changed in
    backports, as they are now part of public API and version-specific ABI.

* Add private `_only_immortal` argument for `sys.getunicodeinternedsize`, used in refleak test machinery.

* Make sure the statically allocated string singletons are unique. This means these sets are now disjoint:
  - `_Py_ID`
  - `_Py_STR` (including the empty string)
  - one-character latin-1 singletons

  Now, when you intern a singleton, that exact singleton will be interned.

* Add a `_Py_LATIN1_CHR` macro, use it instead of `_Py_ID`/`_Py_STR` for one-character latin-1 singletons everywhere (including Clinic).

* Intern `_Py_STR` singletons at startup.

* For free-threaded builds, intern `_Py_LATIN1_CHR` singletons at startup.

* Beef up the tests. Cover internal details (marked with `@cpython_only`).

* Add lots of assertions

Co-Authored-By: Eric Snow <ericsnowcurrently@gmail.com>
2024-06-21 17:19:31 +02:00
..
clinic gh-113993: Allow interned strings to be mortal, and fix related issues (GH-120520) 2024-06-21 17:19:31 +02:00
blob.c gh-111926: Make weakrefs thread-safe in free-threaded builds (#117168) 2024-04-08 10:58:38 -04:00
blob.h gh-69093: Support basic incremental I/O to blobs in `sqlite3` (GH-30680) 2022-04-14 17:02:56 -07:00
connection.c gh-118406: Add signature for sqlite3.Connection objects (#118428) 2024-04-30 19:58:22 +00:00
connection.h gh-104922: remove PY_SSIZE_T_CLEAN (#106315) 2023-07-02 15:07:46 +09:00
cursor.c gh-118928: sqlite3: correctly bail if sequences of params are used with named placeholders (#119197) 2024-05-20 09:44:42 -04:00
cursor.h gh-104922: remove PY_SSIZE_T_CLEAN (#106315) 2023-07-02 15:07:46 +09:00
microprotocols.c gh-111789: Simplify the sqlite code (GH-111829) 2023-11-10 20:49:24 +00:00
microprotocols.h gh-104922: remove PY_SSIZE_T_CLEAN (#106315) 2023-07-02 15:07:46 +09:00
module.c gh-118924: Remove `sqlite3.version` and `sqlite3.version_info` (#118925) 2024-05-10 20:42:34 +00:00
module.h gh-104922: remove PY_SSIZE_T_CLEAN (#106315) 2023-07-02 15:07:46 +09:00
prepare_protocol.c gh-94321: Document sqlite3.PrepareProtocol (#94620) 2022-07-08 00:33:17 +02:00
prepare_protocol.h Remove unused UNKNOWN macros from cursor.h and prepare_protocol.h (GH-27885) 2021-08-22 22:23:45 +09:00
row.c gh-110964: Remove private _PyArg functions (#110966) 2023-10-17 14:30:31 +02:00
row.h gh-104922: remove PY_SSIZE_T_CLEAN (#106315) 2023-07-02 15:07:46 +09:00
statement.c gh-88239: Use sqlite3_stmt_busy() to determine if statements are in use (#25984) 2022-06-27 09:58:56 +02:00
statement.h gh-104922: remove PY_SSIZE_T_CLEAN (#106315) 2023-07-02 15:07:46 +09:00
util.c gh-111140: Adds PyLong_AsNativeBytes and PyLong_FromNative[Unsigned]Bytes functions (GH-114886) 2024-02-12 20:13:13 +00:00
util.h gh-104922: remove PY_SSIZE_T_CLEAN (#106315) 2023-07-02 15:07:46 +09:00