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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, sizeof
from drgn.helpers.linux.mapletree import mt_for_each, mtree_load
from drgn.helpers.linux.xarray import xa_is_zero
from tests.linux_kernel import LinuxKernelTestCase, skip_unless_have_test_kmod
@skip_unless_have_test_kmod
class TestMapleTree(LinuxKernelTestCase):
@classmethod
def setUpClass(cls):
super().setUpClass()
if not cls.prog["drgn_test_have_maple_tree"]:
raise unittest.SkipTest("kernel does not have maple tree")
def maple_trees(self, name):
yield self.prog["drgn_test_maple_tree_" + name].address_of_(), False
yield self.prog["drgn_test_maple_tree_arange_" + name].address_of_(), True
def test_mtree_load_empty(self):
for mt, _ in self.maple_trees("empty"):
self.assertIdentical(mtree_load(mt, 0), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 666), NULL(self.prog, "void *"))
def test_mt_for_each_empty(self):
for mt, _ in self.maple_trees("empty"):
self.assertIdentical(list(mt_for_each(mt)), [])
def test_mtree_load_one(self):
for mt, _ in self.maple_trees("one"):
self.assertIdentical(mtree_load(mt, 0), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 665), NULL(self.prog, "void *"))
self.assertIdentical(
mtree_load(mt, 666), Object(self.prog, "void *", 0xDEADB00)
)
self.assertIdentical(mtree_load(mt, 667), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 2**32 - 1), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 2**64 - 1), NULL(self.prog, "void *"))
def test_mt_for_each_one(self):
for mt, _ in self.maple_trees("one"):
self.assertIdentical(
list(mt_for_each(mt)),
[(666, 666, Object(self.prog, "void *", 0xDEADB00))],
)
def test_mtree_load_one_range(self):
for mt, _ in self.maple_trees("one_range"):
self.assertIdentical(mtree_load(mt, 0), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 615), NULL(self.prog, "void *"))
self.assertIdentical(
mtree_load(mt, 616), Object(self.prog, "void *", 0xDEADB000)
)
self.assertIdentical(
mtree_load(mt, 660), Object(self.prog, "void *", 0xDEADB000)
)
self.assertIdentical(
mtree_load(mt, 666), Object(self.prog, "void *", 0xDEADB000)
)
self.assertIdentical(mtree_load(mt, 667), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 2**32 - 1), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 2**64 - 1), NULL(self.prog, "void *"))
def test_mt_for_each_one_range(self):
for mt, _ in self.maple_trees("one_range"):
self.assertIdentical(
list(mt_for_each(mt)),
[(616, 666, Object(self.prog, "void *", 0xDEADB000))],
)
def test_mtree_load_one_at_zero(self):
for mt, _ in self.maple_trees("one_at_zero"):
self.assertIdentical(mtree_load(mt, 0), Object(self.prog, "void *", 0x1234))
self.assertIdentical(mtree_load(mt, 1), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 2**32 - 1), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 2**64 - 1), NULL(self.prog, "void *"))
def test_mt_for_each_one_at_zero(self):
for mt, _ in self.maple_trees("one_at_zero"):
self.assertIdentical(
list(mt_for_each(mt)), [(0, 0, Object(self.prog, "void *", 0x1234))]
)
def test_mtree_load_one_range_at_zero(self):
for mt, _ in self.maple_trees("one_range_at_zero"):
self.assertIdentical(mtree_load(mt, 0), Object(self.prog, "void *", 0x5678))
self.assertIdentical(mtree_load(mt, 1), Object(self.prog, "void *", 0x5678))
self.assertIdentical(
mtree_load(mt, 0x1336), Object(self.prog, "void *", 0x5678)
)
self.assertIdentical(
mtree_load(mt, 0x1337), Object(self.prog, "void *", 0x5678)
)
self.assertIdentical(mtree_load(mt, 0x1338), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 2**32 - 1), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 2**64 - 1), NULL(self.prog, "void *"))
def test_mt_for_each_one_range_at_zero(self):
for mt, _ in self.maple_trees("one_range_at_zero"):
self.assertIdentical(
list(mt_for_each(mt)),
[(0, 0x1337, Object(self.prog, "void *", 0x5678))],
)
def test_mtree_load_zero_entry(self):
for mt, _ in self.maple_trees("zero_entry"):
self.assertIdentical(mtree_load(mt, 666), NULL(self.prog, "void *"))
self.assertTrue(xa_is_zero(mtree_load(mt, 666, advanced=True)))
def test_mtree_for_each_zero_entry(self):
for mt, _ in self.maple_trees("zero_entry"):
self.assertIdentical(list(mt_for_each(mt)), [])
entries = list(mt_for_each(mt, advanced=True))
self.assertEqual(len(entries), 1)
self.assertEqual(entries[0][:2], (666, 666))
self.assertTrue(xa_is_zero(entries[0][2]))
def test_mtree_load_zero_entry_at_zero(self):
for mt, _ in self.maple_trees("zero_entry_at_zero"):
self.assertIdentical(mtree_load(mt, 0), NULL(self.prog, "void *"))
self.assertTrue(xa_is_zero(mtree_load(mt, 0, advanced=True)))
def test_mtree_for_each_zero_entry_at_zero(self):
for mt, _ in self.maple_trees("zero_entry_at_zero"):
self.assertIdentical(list(mt_for_each(mt)), [])
entries = list(mt_for_each(mt, advanced=True))
self.assertEqual(len(entries), 1)
self.assertEqual(entries[0][:2], (0, 0))
self.assertTrue(xa_is_zero(entries[0][2]))
def test_mtree_load_dense(self):
for mt, _ in self.maple_trees("dense"):
for i in range(5):
with self.subTest(i=i):
self.assertIdentical(
mtree_load(mt, i), Object(self.prog, "void *", 0xB0BA000 | i)
)
self.assertIdentical(mtree_load(mt, 5), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 2**32 - 1), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 2**64 - 1), NULL(self.prog, "void *"))
def test_mt_for_each_dense(self):
for mt, _ in self.maple_trees("dense"):
self.assertIdentical(
list(mt_for_each(mt)),
[(i, i, Object(self.prog, "void *", 0xB0BA000 | i)) for i in range(5)],
)
def test_mtree_load_dense_ranges(self):
for mt, _ in self.maple_trees("dense_ranges"):
self.assertIdentical(
mtree_load(mt, 0), Object(self.prog, "void *", 0xB0BA000)
)
for i in range(1, 4):
self.assertIdentical(
mtree_load(mt, i), Object(self.prog, "void *", 0xB0BA001)
)
for i in range(4, 9):
self.assertIdentical(
mtree_load(mt, i), Object(self.prog, "void *", 0xB0BA002)
)
for i in range(9, 16):
self.assertIdentical(
mtree_load(mt, i), Object(self.prog, "void *", 0xB0BA003)
)
for i in range(16, 25):
self.assertIdentical(
mtree_load(mt, i), Object(self.prog, "void *", 0xB0BA004)
)
self.assertIdentical(mtree_load(mt, 25), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 2**32 - 1), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 2**64 - 1), NULL(self.prog, "void *"))
def test_mt_for_each_dense_ranges(self):
for mt, _ in self.maple_trees("dense_ranges"):
self.assertIdentical(
list(mt_for_each(mt)),
[
(
i**2,
(i + 1) ** 2 - 1,
Object(self.prog, "void *", 0xB0BA000 | i),
)
for i in range(5)
],
)
def test_mtree_load_sparse(self):
for mt, _ in self.maple_trees("sparse"):
self.assertIdentical(mtree_load(mt, 0), NULL(self.prog, "void *"))
self.assertIdentical(
mtree_load(mt, 1), Object(self.prog, "void *", 0xB0BA000)
)
for i in range(2, 4):
self.assertIdentical(mtree_load(mt, i), NULL(self.prog, "void *"))
self.assertIdentical(
mtree_load(mt, 4), Object(self.prog, "void *", 0xB0BA001)
)
for i in range(5, 9):
self.assertIdentical(mtree_load(mt, i), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 26), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 2**32 - 1), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 2**64 - 1), NULL(self.prog, "void *"))
def test_mt_for_each_sparse(self):
for mt, _ in self.maple_trees("sparse"):
self.assertIdentical(
list(mt_for_each(mt)),
[
(
(i + 1) ** 2,
(i + 1) ** 2,
Object(self.prog, "void *", 0xB0BA000 | i),
)
for i in range(5)
],
)
def test_mtree_load_sparse_ranges(self):
for mt, _ in self.maple_trees("sparse_ranges"):
self.assertIdentical(mtree_load(mt, 0), NULL(self.prog, "void *"))
for i in range(1, 5):
self.assertIdentical(
mtree_load(mt, i), Object(self.prog, "void *", 0xB0BA000)
)
for i in range(5, 9):
self.assertIdentical(mtree_load(mt, i), NULL(self.prog, "void *"))
for i in range(9, 17):
self.assertIdentical(
mtree_load(mt, i), Object(self.prog, "void *", 0xB0BA001)
)
for i in range(17, 25):
self.assertIdentical(mtree_load(mt, i), NULL(self.prog, "void *"))
for i in range(25, 37):
self.assertIdentical(
mtree_load(mt, i), Object(self.prog, "void *", 0xB0BA002)
)
for i in range(37, 49):
self.assertIdentical(mtree_load(mt, i), NULL(self.prog, "void *"))
for i in range(49, 65):
self.assertIdentical(
mtree_load(mt, i), Object(self.prog, "void *", 0xB0BA003)
)
for i in range(65, 81):
self.assertIdentical(mtree_load(mt, i), NULL(self.prog, "void *"))
for i in range(81, 101):
self.assertIdentical(
mtree_load(mt, i), Object(self.prog, "void *", 0xB0BA004)
)
self.assertIdentical(mtree_load(mt, 101), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 2**32 - 1), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, 2**64 - 1), NULL(self.prog, "void *"))
def test_mt_for_each_sparse_ranges(self):
for mt, _ in self.maple_trees("sparse_ranges"):
self.assertIdentical(
list(mt_for_each(mt)),
[
(
(2 * i + 1) ** 2,
(2 * i + 2) ** 2,
Object(self.prog, "void *", 0xB0BA000 | i),
)
for i in range(5)
],
)
def test_mtree_load_three_levels_dense_1(self):
maple_range64_slots = self.prog["drgn_test_maple_range64_slots"].value_()
ulong_max = (1 << (sizeof(self.prog.type("unsigned long")) * 8)) - 1
for mt, arange in self.maple_trees("three_levels_dense_1"):
node_slots = self.prog[
(
"drgn_test_maple_arange64_slots"
if arange
else "drgn_test_maple_range64_slots"
)
].value_()
n = 2 * (node_slots - 1) * (maple_range64_slots - 1) + (
maple_range64_slots - 1
)
for i in range(n):
with self.subTest(i=i):
self.assertIdentical(
mtree_load(mt, i), Object(self.prog, "void *", 0xB0BA000 | i)
)
self.assertIdentical(mtree_load(mt, n), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, n + 1), NULL(self.prog, "void *"))
self.assertIdentical(
mtree_load(mt, ulong_max - 1), NULL(self.prog, "void *")
)
self.assertIdentical(mtree_load(mt, ulong_max), NULL(self.prog, "void *"))
def test_mt_for_each_three_levels_dense_1(self):
maple_range64_slots = self.prog["drgn_test_maple_range64_slots"].value_()
for mt, arange in self.maple_trees("three_levels_dense_1"):
node_slots = self.prog[
(
"drgn_test_maple_arange64_slots"
if arange
else "drgn_test_maple_range64_slots"
)
].value_()
n = 2 * (node_slots - 1) * (maple_range64_slots - 1) + (
maple_range64_slots - 1
)
self.assertIdentical(
list(mt_for_each(mt)),
[(i, i, Object(self.prog, "void *", 0xB0BA000 | i)) for i in range(n)],
)
def test_mtree_load_three_levels_dense_2(self):
maple_range64_slots = self.prog["drgn_test_maple_range64_slots"].value_()
ulong_max = (1 << (sizeof(self.prog.type("unsigned long")) * 8)) - 1
for mt, arange in self.maple_trees("three_levels_dense_2"):
node_slots = self.prog[
(
"drgn_test_maple_arange64_slots"
if arange
else "drgn_test_maple_range64_slots"
)
].value_()
n = 2 * node_slots * maple_range64_slots
for i in range(n):
with self.subTest(i=i):
self.assertIdentical(
mtree_load(mt, i), Object(self.prog, "void *", 0xB0BA000 | i)
)
self.assertIdentical(mtree_load(mt, n), NULL(self.prog, "void *"))
self.assertIdentical(mtree_load(mt, n + 1), NULL(self.prog, "void *"))
self.assertIdentical(
mtree_load(mt, ulong_max - 1), NULL(self.prog, "void *")
)
self.assertIdentical(mtree_load(mt, ulong_max), NULL(self.prog, "void *"))
def test_mt_for_each_three_levels_dense_2(self):
maple_range64_slots = self.prog["drgn_test_maple_range64_slots"].value_()
for mt, arange in self.maple_trees("three_levels_dense_2"):
node_slots = self.prog[
(
"drgn_test_maple_arange64_slots"
if arange
else "drgn_test_maple_range64_slots"
)
].value_()
n = 2 * node_slots * maple_range64_slots
self.assertIdentical(
list(mt_for_each(mt)),
[(i, i, Object(self.prog, "void *", 0xB0BA000 | i)) for i in range(n)],
)
def test_mtree_load_three_levels_ranges_1(self):
maple_range64_slots = self.prog["drgn_test_maple_range64_slots"].value_()
ulong_max = (1 << (sizeof(self.prog.type("unsigned long")) * 8)) - 1
for mt, arange in self.maple_trees("three_levels_ranges_1"):
node_slots = self.prog[
(
"drgn_test_maple_arange64_slots"
if arange
else "drgn_test_maple_range64_slots"
)
].value_()
n = 2 * (node_slots - 1) * (maple_range64_slots - 1) + (
maple_range64_slots - 1
)
for i in range(n):
with self.subTest(i=i):
self.assertIdentical(
mtree_load(mt, 2 * i),
Object(self.prog, "void *", 0xB0BA000 | i),
)
self.assertIdentical(
mtree_load(mt, 2 * i + 1),
Object(self.prog, "void *", 0xB0BA000 | i),
)
self.assertIdentical(
mtree_load(mt, 2 * n), Object(self.prog, "void *", 0xB0BA000 | n)
)
self.assertIdentical(
mtree_load(mt, 2 * n + 1), Object(self.prog, "void *", 0xB0BA000 | n)
)
self.assertIdentical(
mtree_load(mt, ulong_max - 1),
Object(self.prog, "void *", 0xB0BA000 | n),
)
self.assertIdentical(
mtree_load(mt, ulong_max), Object(self.prog, "void *", 0xB0BA000 | n)
)
def test_mt_for_each_three_levels_ranges_1(self):
maple_range64_slots = self.prog["drgn_test_maple_range64_slots"].value_()
ulong_max = (1 << (sizeof(self.prog.type("unsigned long")) * 8)) - 1
for mt, arange in self.maple_trees("three_levels_ranges_1"):
node_slots = self.prog[
(
"drgn_test_maple_arange64_slots"
if arange
else "drgn_test_maple_range64_slots"
)
].value_()
n = 2 * (node_slots - 1) * (maple_range64_slots - 1) + (
maple_range64_slots - 1
)
self.assertIdentical(
list(mt_for_each(mt)),
[
(2 * i, 2 * i + 1, Object(self.prog, "void *", 0xB0BA000 | i))
for i in range(n)
]
+ [(2 * n, ulong_max, Object(self.prog, "void *", 0xB0BA000 | n))],
)
def test_mtree_load_three_levels_ranges_2(self):
maple_range64_slots = self.prog["drgn_test_maple_range64_slots"].value_()
ulong_max = (1 << (sizeof(self.prog.type("unsigned long")) * 8)) - 1
for mt, arange in self.maple_trees("three_levels_ranges_2"):
node_slots = self.prog[
(
"drgn_test_maple_arange64_slots"
if arange
else "drgn_test_maple_range64_slots"
)
].value_()
n = 2 * node_slots * maple_range64_slots
for i in range(n):
with self.subTest(i=i):
self.assertIdentical(
mtree_load(mt, 2 * i),
Object(self.prog, "void *", 0xB0BA000 | i),
)
self.assertIdentical(
mtree_load(mt, 2 * i + 1),
Object(self.prog, "void *", 0xB0BA000 | i),
)
self.assertIdentical(
mtree_load(mt, 2 * n), Object(self.prog, "void *", 0xB0BA000 | n)
)
self.assertIdentical(
mtree_load(mt, 2 * n + 1), Object(self.prog, "void *", 0xB0BA000 | n)
)
self.assertIdentical(
mtree_load(mt, ulong_max - 1),
Object(self.prog, "void *", 0xB0BA000 | n),
)
self.assertIdentical(
mtree_load(mt, ulong_max), Object(self.prog, "void *", 0xB0BA000 | n)
)
def test_mt_for_each_three_levels_ranges_2(self):
maple_range64_slots = self.prog["drgn_test_maple_range64_slots"].value_()
ulong_max = (1 << (sizeof(self.prog.type("unsigned long")) * 8)) - 1
for mt, arange in self.maple_trees("three_levels_ranges_2"):
node_slots = self.prog[
(
"drgn_test_maple_arange64_slots"
if arange
else "drgn_test_maple_range64_slots"
)
].value_()
n = 2 * node_slots * maple_range64_slots
self.assertIdentical(
list(mt_for_each(mt)),
[
(2 * i, 2 * i + 1, Object(self.prog, "void *", 0xB0BA000 | i))
for i in range(n)
]
+ [(2 * n, ulong_max, Object(self.prog, "void *", 0xB0BA000 | n))],
)
|
