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Fixed refcount bug in copy_to() and copy_expert() methods too

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This commit is contained in:
Daniele Varrazzo 2011-06-07 00:07:59 +01:00
parent 1888bf41c0
commit b6e710b0fc
2 changed files with 31 additions and 18 deletions
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31
psycopg/cursor_type.c
View File

@ -1343,8 +1343,6 @@ static int
_psyco_curs_has_write_check(PyObject* o, void* var)
{
if (PyObject_HasAttrString(o, "write")) {
/* It's OK to store a borrowed reference, because it is only held for
* the duration of psyco_curs_copy_to. */
*((PyObject**)var) = o;
return 1;
}
@ -1430,12 +1428,15 @@ psyco_curs_copy_to(cursorObject *self, PyObject *args, PyObject *kwargs)
Dprintf("psyco_curs_copy_to: query = %s", query);
self->copysize = 0;
Py_INCREF(file);
self->copyfile = file;
if (pq_execute(self, query, 0) == 1) {
res = Py_None;
Py_INCREF(Py_None);
}
Py_DECREF(file);
self->copyfile = NULL;
exit:
@ -1477,18 +1478,18 @@ psyco_curs_copy_expert(cursorObject *self, PyObject *args, PyObject *kwargs)
EXC_IF_TPC_PREPARED(self->conn, copy_expert);
sql = _psyco_curs_validate_sql_basic(self, sql);
/* Any failure from here forward should 'goto fail' rather than
/* Any failure from here forward should 'goto exit' rather than
'return NULL' directly. */
if (sql == NULL) { goto fail; }
if (sql == NULL) { goto exit; }
/* This validation of file is rather weak, in that it doesn't enforce the
assocation between "COPY FROM" -> "read" and "COPY TO" -> "write".
However, the error handling in _pq_copy_[in|out] must be able to handle
the case where the attempt to call file.read|write fails, so no harm
done. */
if ( !PyObject_HasAttrString(file, "read")
&& !PyObject_HasAttrString(file, "write")
)
@ -1496,26 +1497,22 @@ psyco_curs_copy_expert(cursorObject *self, PyObject *args, PyObject *kwargs)
PyErr_SetString(PyExc_TypeError, "file must be a readable file-like"
" object for COPY FROM; a writeable file-like object for COPY TO."
);
goto fail;
goto exit;
}
self->copysize = bufsize;
Py_INCREF(file);
self->copyfile = file;
/* At this point, the SQL statement must be str, not unicode */
if (pq_execute(self, Bytes_AS_STRING(sql), 0) != 1) { goto fail; }
if (pq_execute(self, Bytes_AS_STRING(sql), 0) != 1) { goto exit; }
res = Py_None;
Py_INCREF(res);
goto cleanup;
fail:
if (res != NULL) {
Py_DECREF(res);
res = NULL;
}
/* Fall through to cleanup */
cleanup:
exit:
self->copyfile = NULL;
Py_XDECREF(file);
Py_XDECREF(sql);
return res;

18
scripts/ticket58.py
View File

@ -42,13 +42,29 @@ cur = conn.cursor()
gc_thread.start()
# Now do lots of "cursor.copy_from" calls:
print "copy_from"
for i in range(1000):
f = StringIO("42\tfoo\n74\tbar\n")
cur.copy_from(f, 'test', columns=('num', 'data'))
# Assuming the other thread gets a chance to run during this call, expect a
# build of python (with assertions enabled) to bail out here with:
# python: Modules/gcmodule.c:277: visit_decref: Assertion `gc->gc.gc_refs != 0' failed.
# Also exercise the copy_to code path
print "copy_to"
cur.execute("truncate test")
f = StringIO("42\tfoo\n74\tbar\n")
cur.copy_from(f, 'test', columns=('num', 'data'))
for i in range(1000):
f = StringIO()
cur.copy_to(f, 'test', columns=('num', 'data'))
# And copy_expert too
print "copy_expert"
cur.execute("truncate test")
for i in range(1000):
f = StringIO("42\tfoo\n74\tbar\n")
cur.copy_expert("copy test to stdout", f)
# Terminate the GC thread's loop:
done = 1