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[3.10] bpo-42972: Track sqlite3 statement objects (GH-26475) (GH-26515)

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Allocate and track statement objects in pysqlite_statement_create.

By allocating and tracking creation of statement object in
pysqlite_statement_create(), the caller does not need to worry about GC
syncronization, and eliminates the possibility of getting a badly
created object. All related fault handling is moved to
pysqlite_statement_create().

Co-authored-by: Victor Stinner <vstinner@python.org>.
(cherry picked from commit fffa0f92ad)

Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>
This commit is contained in:
Erlend Egeberg Aasland 2021-06-03 18:38:09 +02:00 • committed by GitHub
parent 41317801a9
commit 84d80f5f30
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4 changed files with 40 additions and 48 deletions
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9
Modules/_sqlite/cursor.c
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@ -507,13 +507,8 @@ _pysqlite_query_execute(pysqlite_Cursor* self, int multiple, PyObject* operation
if (self->statement->in_use) {
Py_SETREF(self->statement,
PyObject_GC_New(pysqlite_Statement, pysqlite_StatementType));
if (!self->statement) {
goto error;
}
rc = pysqlite_statement_create(self->statement, self->connection, operation);
if (rc != SQLITE_OK) {
Py_CLEAR(self->statement);
pysqlite_statement_create(self->connection, operation));
if (self->statement == NULL) {
goto error;
}
}