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# Copyright (c) Meta Platforms, Inc. and affiliates.
# SPDX-License-Identifier: LGPL-2.1-or-later
import re
from drgn import Object
from drgn.helpers.linux.ipc import find_sysv_msg_queue, find_sysv_shm
from tests.linux_kernel.crash_commands import CrashCommandTestCase
from tests.linux_kernel.helpers.test_ipc import tmp_sysv_ipc
class TestIpcs(CrashCommandTestCase):
@classmethod
def setUpClass(cls):
super().setUpClass()
cls.run_crash_command("set -p")
cls.ipcs = cls.enterClassContext(tmp_sysv_ipc())
def test_ipcs(self):
cmd = self.check_crash_command("ipcs")
found_shm = {}
found_sem = {}
found_msg = {}
for line in cmd.stdout.splitlines():
if line.startswith("SHMID_KERNEL"):
found = found_shm
elif line.startswith("SEM_ARRAY"):
found = found_sem
elif line.startswith("MSG_QUEUE"):
found = found_msg
elif match := re.match(r"[0-9a-f]+\s+([0-9a-f]+)\s+([0-9]+)", line):
found[(int(match.group(1), 16), int(match.group(2)))] = line
for key, id in self.ipcs.shm:
self.assertIn((key, id), found_shm)
self.assertIn("SHM_LOCKED", found_shm[self.ipcs.shm[0]])
for key, id in self.ipcs.sem:
self.assertIn((key, id), found_sem)
for key, id in self.ipcs.msg:
self.assertIn((key, id), found_msg)
self.assertEqual(
cmd.drgn_option.globals["shm"].type_.type_name(), "struct shmid_kernel *"
)
self.assertEqual(
cmd.drgn_option.globals["sem_array"].type_.type_name(), "struct sem_array *"
)
self.assertEqual(
cmd.drgn_option.globals["msg_queue"].type_.type_name(), "struct msg_queue *"
)
for variable in (
"key",
"id",
"perms",
"bytes",
"nattch",
"nsems",
"used_bytes",
"messages",
):
with self.subTest(variable=variable):
self.assertIsInstance(cmd.drgn_option.globals[variable], Object)
self.assertIsInstance(cmd.drgn_option.globals["uid"], int)
self.assertIsInstance(cmd.drgn_option.globals["status"], str)
def test_s(self):
cmd = self.check_crash_command("ipcs -s")
self.assertIn("SEM_ARRAY", cmd.stdout)
self.assertNotIn("SHMID_KERNEL", cmd.stdout)
self.assertNotIn("MSG_QUEUE", cmd.stdout)
self.assertEqual(
cmd.drgn_option.globals["sem_array"].type_.type_name(), "struct sem_array *"
)
self.assertNotIn("shm", cmd.drgn_option.globals)
self.assertNotIn("msg_queue", cmd.drgn_option.globals)
for variable in (
"key",
"id",
"perms",
"nsems",
):
with self.subTest(variable=variable):
self.assertIsInstance(cmd.drgn_option.globals[variable], Object)
self.assertIsInstance(cmd.drgn_option.globals["uid"], int)
self.assertNotIn("bytes", cmd.drgn_option.globals)
self.assertNotIn("nattch", cmd.drgn_option.globals)
self.assertNotIn("used_bytes", cmd.drgn_option.globals)
self.assertNotIn("messages", cmd.drgn_option.globals)
self.assertNotIn("status", cmd.drgn_option.globals)
def test_m(self):
cmd = self.check_crash_command("ipcs -m")
self.assertIn("SHMID_KERNEL", cmd.stdout)
self.assertNotIn("SEM_ARRAY", cmd.stdout)
self.assertNotIn("MSG_QUEUE", cmd.stdout)
self.assertEqual(
cmd.drgn_option.globals["shm"].type_.type_name(), "struct shmid_kernel *"
)
self.assertNotIn("sem_array", cmd.drgn_option.globals)
self.assertNotIn("msg_queue", cmd.drgn_option.globals)
for variable in (
"key",
"id",
"perms",
"bytes",
"nattch",
):
with self.subTest(variable=variable):
self.assertIsInstance(cmd.drgn_option.globals[variable], Object)
self.assertIsInstance(cmd.drgn_option.globals["uid"], int)
self.assertIsInstance(cmd.drgn_option.globals["status"], str)
self.assertNotIn("nsems", cmd.drgn_option.globals)
self.assertNotIn("used_bytes", cmd.drgn_option.globals)
self.assertNotIn("messages", cmd.drgn_option.globals)
def test_q(self):
cmd = self.check_crash_command("ipcs -q")
self.assertIn("MSG_QUEUE", cmd.stdout)
self.assertNotIn("SHMID_KERNEL", cmd.stdout)
self.assertNotIn("SEM_ARRAY", cmd.stdout)
self.assertEqual(
cmd.drgn_option.globals["msg_queue"].type_.type_name(), "struct msg_queue *"
)
self.assertNotIn("shm", cmd.drgn_option.globals)
self.assertNotIn("sem_array", cmd.drgn_option.globals)
for variable in (
"key",
"id",
"perms",
"used_bytes",
"messages",
):
with self.subTest(variable=variable):
self.assertIsInstance(cmd.drgn_option.globals[variable], Object)
self.assertIsInstance(cmd.drgn_option.globals["uid"], int)
self.assertNotIn("bytes", cmd.drgn_option.globals)
self.assertNotIn("nattch", cmd.drgn_option.globals)
self.assertNotIn("status", cmd.drgn_option.globals)
self.assertNotIn("nsems", cmd.drgn_option.globals)
def test_id(self):
shm_key, shm_id = self.ipcs.shm[0]
cmd = self.check_crash_command(f"ipcs {shm_id}")
found_shm = {}
found_sem = {}
found_msg = {}
for line in cmd.stdout.splitlines():
if line.startswith("SHMID_KERNEL"):
found = found_shm
elif line.startswith("SEM_ARRAY"):
found = found_sem
elif line.startswith("MSG_QUEUE"):
found = found_msg
elif match := re.match(r"[0-9a-f]+\s+([0-9a-f]+)\s+([0-9]+)", line):
found[(int(match.group(1), 16), int(match.group(2)))] = line
for key, id in self.ipcs.shm:
if (key, id) == (shm_key, shm_id):
self.assertIn((key, id), found_shm)
else:
self.assertNotIn((key, id), found_shm)
self.assertIn("SHM_LOCKED", found_shm[self.ipcs.shm[0]])
self.assertEqual(
cmd.drgn_option.globals["shm"], find_sysv_shm(self.prog, shm_id)
)
for variable in (
"key",
"id",
"perms",
"bytes",
"nattch",
):
with self.subTest(variable=variable):
self.assertIsInstance(cmd.drgn_option.globals[variable], Object)
self.assertIsInstance(cmd.drgn_option.globals["uid"], int)
self.assertIsInstance(cmd.drgn_option.globals["status"], str)
def test_addr(self):
msg_key, msg_id = self.ipcs.msg[0]
msg_queue = find_sysv_msg_queue(self.prog, msg_id)
cmd = self.check_crash_command(f"ipcs {hex(msg_queue)}")
found_shm = {}
found_sem = {}
found_msg = {}
for line in cmd.stdout.splitlines():
if line.startswith("SHMID_KERNEL"):
found = found_shm
elif line.startswith("SEM_ARRAY"):
found = found_sem
elif line.startswith("MSG_QUEUE"):
found = found_msg
elif match := re.match(r"[0-9a-f]+\s+([0-9a-f]+)\s+([0-9]+)", line):
found[(int(match.group(1), 16), int(match.group(2)))] = line
for key, id in self.ipcs.msg:
if (key, id) == (msg_key, msg_id):
self.assertIn((key, id), found_msg)
else:
self.assertNotIn((key, id), found_msg)
self.assertFalse(found_shm)
self.assertFalse(found_sem)
self.assertEqual(
cmd.drgn_option.globals["msg_queue"].type_.type_name(), "struct msg_queue *"
)
for variable in (
"key",
"id",
"perms",
"used_bytes",
"messages",
):
with self.subTest(variable=variable):
self.assertIsInstance(cmd.drgn_option.globals[variable], Object)
self.assertIsInstance(cmd.drgn_option.globals["uid"], int)
self.assertNotIn("bytes", cmd.drgn_option.globals)
self.assertNotIn("nattch", cmd.drgn_option.globals)
self.assertNotIn("status", cmd.drgn_option.globals)
self.assertNotIn("nsems", cmd.drgn_option.globals)
def test_n_pid(self):
cmd = self.check_crash_command("ipcs -n 1")
self.assertIn("SHM_LOCKED", cmd.stdout)
self.assertIn("for_each_sysv_shm(ipc_ns)", cmd.drgn_option.stdout)
self.assertEqual(
cmd.drgn_option.globals["ipc_ns"], self.prog["init_ipc_ns"].address_of_()
)
def test_n_task(self):
task = self.prog["init_task"].address_of_()
cmd = self.check_crash_command(f"ipcs -n {hex(task)}")
self.assertIn("SHM_LOCKED", cmd.stdout)
self.assertIn("for_each_sysv_shm(ipc_ns)", cmd.drgn_option.stdout)
self.assertEqual(
cmd.drgn_option.globals["ipc_ns"], self.prog["init_ipc_ns"].address_of_()
)
def test_n_and_id(self):
shm_key, shm_id = self.ipcs.shm[0]
cmd = self.check_crash_command(f"ipcs -n 1 {shm_id}")
self.assertIn("SHM_LOCKED", cmd.stdout)
self.assertIn("find_sysv_shm(ipc_ns,", cmd.drgn_option.stdout)
self.assertEqual(
cmd.drgn_option.globals["ipc_ns"], self.prog["init_ipc_ns"].address_of_()
)
def test_n_and_addr(self):
msg_key, msg_id = self.ipcs.msg[0]
msg_queue = find_sysv_msg_queue(self.prog, msg_id)
cmd = self.check_crash_command(f"ipcs -n 1 {hex(msg_queue)}")
self.assertIn("for_each_sysv_msg_queue(ipc_ns)", cmd.drgn_option.stdout)
self.assertEqual(
cmd.drgn_option.globals["ipc_ns"], self.prog["init_ipc_ns"].address_of_()
)
|
