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# Copyright (c) Meta Platforms, Inc. and affiliates.
# SPDX-License-Identifier: LGPL-2.1-or-later
import os
from drgn import Object, ObjectNotFoundError, Program
from tests.linux_kernel import LinuxKernelTestCase, skip_unless_have_test_kmod
class TestJiffies(LinuxKernelTestCase):
def test_jiffies(self):
self.assertIdentical(
self.prog["jiffies"],
Object(
self.prog,
"volatile unsigned long",
address=self.prog.symbol("jiffies").address,
),
)
class TestUts(LinuxKernelTestCase):
def test_uts_release(self):
self.assertEqual(
self.prog["UTS_RELEASE"].string_().decode(), os.uname().release
)
def test_uts_release_no_debug_info(self):
prog = Program()
prog.set_kernel()
self.assertEqual(prog["UTS_RELEASE"].string_().decode(), os.uname().release)
class TestVmcoreinfo(LinuxKernelTestCase):
def test_vmcoreinfo(self):
vmcoreinfo_data = dict(
line.split("=", 1)
for line in self.prog["VMCOREINFO"].string_().decode().strip().split("\n")
)
self.assertEqual(
int(vmcoreinfo_data["SYMBOL(init_uts_ns)"], 16),
self.prog.symbol("init_uts_ns").address,
)
def test_vmcoreinfo_no_debug_info(self):
prog = Program()
prog.set_kernel()
vmcoreinfo_data = dict(
line.split("=", 1)
for line in prog["VMCOREINFO"].string_().decode().strip().split("\n")
)
self.assertEqual(
vmcoreinfo_data["OSRELEASE"],
os.uname().release,
)
@skip_unless_have_test_kmod
def test_constants(self):
for constant in (
"THREAD_SIZE",
"NR_SECTION_ROOTS",
"SECTIONS_PER_ROOT",
"SECTION_SIZE_BITS",
"MAX_PHYSMEM_BITS",
"ARCH_PFN_OFFSET",
):
with self.subTest(constant=constant):
try:
expected = self.prog["drgn_test_" + constant].read_()
except ObjectNotFoundError:
with self.assertRaises(ObjectNotFoundError):
self.prog[constant]
else:
self.assertEqual(self.prog[constant], expected)
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