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# Copyright (c) Meta Platforms, Inc. and affiliates.
# SPDX-License-Identifier: LGPL-2.1-or-later
import unittest
from drgn import NULL, Object
from drgn.helpers.linux.xarray import (
xa_for_each,
xa_is_value,
xa_is_zero,
xa_load,
xa_to_value,
)
from tests.linux_kernel import LinuxKernelTestCase, skip_unless_have_test_kmod
@skip_unless_have_test_kmod
class TestXArray(LinuxKernelTestCase):
@classmethod
def setUpClass(cls):
super().setUpClass()
if not cls.prog["drgn_test_have_xarray"]:
raise unittest.SkipTest("kernel does not have XArray")
def test_xa_is_zero(self):
self.assertTrue(xa_is_zero(self.prog["drgn_test_xa_zero_entry"]))
self.assertFalse(xa_is_zero(NULL(self.prog, "void *")))
def test_xa_load_empty(self):
xa = self.prog["drgn_test_xarray_empty"].address_of_()
self.assertIdentical(xa_load(xa, 0), NULL(self.prog, "void *"))
self.assertIdentical(xa_load(xa, 100000), NULL(self.prog, "void *"))
def test_xa_for_each_empty(self):
xa = self.prog["drgn_test_xarray_empty"].address_of_()
self.assertIdentical(list(xa_for_each(xa)), [])
def test_xa_load_one(self):
xa = self.prog["drgn_test_xarray_one"].address_of_()
self.assertIdentical(xa_load(xa, 0), NULL(self.prog, "void *"))
self.assertIdentical(xa_load(xa, 665), NULL(self.prog, "void *"))
self.assertIdentical(xa_load(xa, 666), Object(self.prog, "void *", 0xDEADB00))
self.assertIdentical(xa_load(xa, 667), NULL(self.prog, "void *"))
self.assertIdentical(xa_load(xa, 100000), NULL(self.prog, "void *"))
def test_xa_for_each_one(self):
xa = self.prog["drgn_test_xarray_one"].address_of_()
self.assertIdentical(
list(xa_for_each(xa)), [(666, Object(self.prog, "void *", 0xDEADB00))]
)
def test_xa_load_one_at_zero(self):
xa = self.prog["drgn_test_xarray_one_at_zero"].address_of_()
self.assertIdentical(xa_load(xa, 0), Object(self.prog, "void *", 0x1234))
self.assertIdentical(xa_load(xa, 1), NULL(self.prog, "void *"))
self.assertIdentical(xa_load(xa, 100000), NULL(self.prog, "void *"))
def test_xa_for_each_one_at_zero(self):
xa = self.prog["drgn_test_xarray_one_at_zero"].address_of_()
self.assertIdentical(
list(xa_for_each(xa)), [(0, Object(self.prog, "void *", 0x1234))]
)
def test_xa_load_sparse(self):
xa = self.prog["drgn_test_xarray_sparse"].address_of_()
self.assertIdentical(xa_load(xa, 0), NULL(self.prog, "void *"))
self.assertIdentical(xa_load(xa, 1), Object(self.prog, "void *", 0x1234))
self.assertIdentical(xa_load(xa, 2), NULL(self.prog, "void *"))
self.assertIdentical(xa_load(xa, 0x40000000), NULL(self.prog, "void *"))
self.assertIdentical(xa_load(xa, 0x80000000), NULL(self.prog, "void *"))
self.assertIdentical(xa_load(xa, 0x80800000), NULL(self.prog, "void *"))
self.assertIdentical(xa_load(xa, 0x80808000), NULL(self.prog, "void *"))
self.assertIdentical(
xa_load(xa, 0x80808080), Object(self.prog, "void *", 0x5678)
)
self.assertIdentical(xa_load(xa, 0xFFFFFFFE), NULL(self.prog, "void *"))
self.assertIdentical(
xa_load(xa, 0xFFFFFFFF), Object(self.prog, "void *", 0x9ABC)
)
def test_xa_for_each_sparse(self):
xa = self.prog["drgn_test_xarray_sparse"].address_of_()
self.assertIdentical(
list(xa_for_each(xa)),
[
(1, Object(self.prog, "void *", 0x1234)),
(0x80808080, Object(self.prog, "void *", 0x5678)),
(0xFFFFFFFF, Object(self.prog, "void *", 0x9ABC)),
],
)
def test_xa_load_multi_index(self):
xa = self.prog["drgn_test_xarray_multi_index"].address_of_()
self.assertIdentical(xa_load(xa, 0x80807FFF), NULL(self.prog, "void *"))
for index in range(0x80808000, 0x80808200):
with self.subTest(index=index):
self.assertIdentical(
xa_load(xa, index), Object(self.prog, "void *", 0x1234)
)
self.assertIdentical(xa_load(xa, 0x80808200), NULL(self.prog, "void *"))
def test_xa_for_each_multi_index(self):
xa = self.prog["drgn_test_xarray_multi_index"].address_of_()
self.assertIdentical(
list(xa_for_each(xa)), [(0x80808000, Object(self.prog, "void *", 0x1234))]
)
def test_xa_load_zero_entry(self):
xa = self.prog["drgn_test_xarray_zero_entry"].address_of_()
self.assertIdentical(xa_load(xa, 0), NULL(self.prog, "void *"))
self.assertIdentical(xa_load(xa, 666), NULL(self.prog, "void *"))
self.assertTrue(xa_is_zero(xa_load(xa, 666, advanced=True)))
self.assertIdentical(xa_load(xa, 2), NULL(self.prog, "void *"))
def test_xa_for_each_zero_entry(self):
xa = self.prog["drgn_test_xarray_zero_entry"].address_of_()
self.assertIdentical(list(xa_for_each(xa)), [])
entries = list(xa_for_each(xa, advanced=True))
self.assertEqual(len(entries), 1)
self.assertEqual(entries[0][0], 666)
self.assertTrue(xa_is_zero(entries[0][1]))
def test_xa_load_zero_entry_at_zero(self):
xa = self.prog["drgn_test_xarray_zero_entry_at_zero"].address_of_()
self.assertIdentical(xa_load(xa, 0), NULL(self.prog, "void *"))
self.assertTrue(xa_is_zero(xa_load(xa, 0, advanced=True)))
self.assertIdentical(xa_load(xa, 1), NULL(self.prog, "void *"))
def test_xa_for_each_zero_entry_at_zero(self):
xa = self.prog["drgn_test_xarray_zero_entry_at_zero"].address_of_()
self.assertIdentical(list(xa_for_each(xa)), [])
entries = list(xa_for_each(xa, advanced=True))
self.assertEqual(len(entries), 1)
self.assertEqual(entries[0][0], 0)
self.assertTrue(xa_is_zero(entries[0][1]))
def test_xa_is_value(self):
self.assertTrue(
xa_is_value(xa_load(self.prog["drgn_test_xarray_value"].address_of_(), 0))
)
self.assertFalse(
xa_is_value(
xa_load(self.prog["drgn_test_xarray_one_at_zero"].address_of_(), 0)
)
)
def test_xa_to_value(self):
self.assertIdentical(
xa_to_value(xa_load(self.prog["drgn_test_xarray_value"].address_of_(), 0)),
Object(self.prog, "unsigned long", 1337),
)
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