1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
# Copyright (c) Meta Platforms, Inc. and affiliates.
# SPDX-License-Identifier: LGPL-2.1-or-later
import signal
import unittest
import drgn
from drgn import Object, sizeof
from drgn.helpers.linux.mm import follow_phys
from tests.linux_kernel import (
skip_unless_have_full_mm_support,
skip_unless_have_test_kmod,
)
from tests.linux_kernel.crash_commands import CrashCommandTestCase
@skip_unless_have_full_mm_support
@skip_unless_have_test_kmod
class TestSearch(CrashCommandTestCase):
@classmethod
def setUpClass(cls):
super().setUpClass()
cls.subject = cls.prog["drgn_test_search_subject"]
cls.subject_args = f"-s {cls.subject.address_:x} -l {sizeof(cls.subject)}"
def test_long(self):
cmd = self.check_crash_command(f"search {self.subject_args} deadbeef")
self.assertRegex(
cmd.stdout, rf"(?m)^\s*{self.subject.l.address_:x}:\s+deadbeef$"
)
self.assertIn("search_memory_word(0xdeadbeef)", cmd.drgn_option.stdout)
self.assertEqual(cmd.drgn_option.globals["address"], self.subject.l.address_)
self.assertEqual(cmd.drgn_option.globals["value"], 0xDEADBEEF)
def test_int(self):
cmd = self.check_crash_command(f"search {self.subject_args} -w deadb00")
self.assertRegex(
cmd.stdout, rf"(?m)^\s*{self.subject.i.address_:x}:\s+deadb00$"
)
self.assertIn("search_memory_u32(0xdeadb00)", cmd.drgn_option.stdout)
self.assertEqual(cmd.drgn_option.globals["address"], self.subject.i.address_)
self.assertEqual(cmd.drgn_option.globals["value"], 0xDEADB00)
def test_short(self):
cmd = self.check_crash_command(f"search {self.subject_args} -h b0ba")
self.assertRegex(cmd.stdout, rf"(?m)^\s*{self.subject.s.address_:x}:\s+b0ba$")
self.assertIn("search_memory_u16(0xb0ba)", cmd.drgn_option.stdout)
self.assertEqual(cmd.drgn_option.globals["address"], self.subject.s.address_)
self.assertEqual(cmd.drgn_option.globals["value"], 0xB0BA)
def test_multiple(self):
cmd = self.check_crash_command(f"search {self.subject_args} deadbeef fee1dead")
self.assertRegex(
cmd.stdout, rf"(?m)^\s*{self.subject.l.address_:x}:\s+deadbeef$"
)
self.assertRegex(
cmd.stdout, rf"(?m)^\s*{self.subject.l2.address_:x}:\s+fee1dead$"
)
self.assertIn(
"search_memory_word(0xdeadbeef, 0xfee1dead)", cmd.drgn_option.stdout
)
self.assertIn(
cmd.drgn_option.globals["address"],
(self.subject.l.address_, self.subject.l2.address_),
)
self.assertIn(cmd.drgn_option.globals["value"], (0xDEADBEEF, 0xFEE1DEAD))
@unittest.skipUnless(drgn._with_pcre2, "built without pcre2 support")
def test_string(self):
cmd = self.check_crash_command(f"search {self.subject_args} -c 'hello, world!'")
self.assertRegex(
cmd.stdout,
rf"(?m)^\s*{self.subject.c.address_:x}:\s+hello, world!\.{{43}}$",
)
self.assertIn('search_memory("hello, world!")', cmd.drgn_option.stdout)
self.assertEqual(cmd.drgn_option.globals["address"], self.subject.c.address_)
@unittest.skipUnless(drgn._with_pcre2, "built without pcre2 support")
def test_multiple_strings(self):
cmd = self.check_crash_command(
f"search {self.subject_args} -c 'hello, world!' 'goodbye, world!'"
)
self.assertRegex(
cmd.stdout,
rf"(?m)^\s*{self.subject.c.address_:x}:\s+hello, world!\.{{43}}$",
)
self.assertRegex(
cmd.stdout,
rf"(?m)^\s*{self.subject.c2.address_:x}:\s+goodbye, world!\.{{41}}$",
)
self.assertIn(
'search_memory_regex(rb"hello,\\ world!|goodbye,\\ world!")',
cmd.drgn_option.stdout,
)
self.assertIn(
cmd.drgn_option.globals["address"],
(self.subject.c.address_, self.subject.c2.address_),
)
self.assertIn(
cmd.drgn_option.globals["value"], (b"hello, world!", b"goodbye, world!")
)
def test_context(self):
cmd = self.check_crash_command(f"search {self.subject_args} fee1dead -x 1")
self.assertRegex(
cmd.stdout, rf"(?m)^\s*{self.subject.l2.address_:x}:\s+fee1dead$"
)
self.assertIn("deadbeef", cmd.stdout)
self.assertIn("deadb00", cmd.stdout)
self.assertIn("search_memory_word(0xfee1dead)", cmd.drgn_option.stdout)
self.assertEqual(cmd.drgn_option.globals["address"], self.subject.l2.address_)
self.assertEqual(cmd.drgn_option.globals["value"], 0xFEE1DEAD)
# Note: we don't do anything in the --drgn output for -x.
def test_ignore_mask(self):
cmd = self.check_crash_command(
f"search {self.subject_args} 0e000e00 -m f0fff0ff"
)
self.assertRegex(
cmd.stdout, rf"(?m)^\s*{self.subject.l.address_:x}:\s+deadbeef$"
)
self.assertRegex(
cmd.stdout, rf"(?m)^\s*{self.subject.l2.address_:x}:\s+fee1dead$"
)
self.assertIn(
"search_memory_word(0xe000e00, ignore_mask=0xf0fff0ff)",
cmd.drgn_option.stdout,
)
self.assertIn(
cmd.drgn_option.globals["address"],
(self.subject.l.address_, self.subject.l2.address_),
)
self.assertIn(cmd.drgn_option.globals["value"], (0xDEADBEEF, 0xFEE1DEAD))
def test_symbols(self):
cmd = self.check_crash_command(
f"search -s drgn_test_search_subject -l {sizeof(self.subject)} drgn_test_function"
)
sym_address = self.prog.symbol("drgn_test_function").address
self.assertRegex(
cmd.stdout,
rf"(?m)^\s*{self.subject.func.address_:x}:\s+{sym_address:x}\s+\(drgn_test_function\)$",
)
self.assertIn(
'search_memory_word(prog.symbol("drgn_test_function").address)',
cmd.drgn_option.stdout,
)
self.assertIn(
'prog.symbol("drgn_test_search_subject").address', cmd.drgn_option.stdout
)
self.assertEqual(cmd.drgn_option.globals["address"], self.subject.func.address_)
self.assertEqual(cmd.drgn_option.globals["value"], sym_address)
def test_end(self):
start = self.subject.address_
end = start + sizeof(self.subject)
cmd = self.check_crash_command(f"search -s {start:x} -e {end:x} deadbeef")
self.assertRegex(
cmd.stdout, rf"(?m)^\s*{self.subject.l.address_:x}:\s+deadbeef$"
)
self.assertIn("search_memory_word(0xdeadbeef)", cmd.drgn_option.stdout)
self.assertIn(
f"set_address_range(min_address={start:#x}, max_address={end:#x} - 1)",
cmd.drgn_option.stdout,
)
self.assertEqual(cmd.drgn_option.globals["address"], self.subject.l.address_)
self.assertEqual(cmd.drgn_option.globals["value"], 0xDEADBEEF)
def test_physical(self):
subject = self.prog["drgn_test_search_subject2"]
address = follow_phys(self.prog["init_mm"].address_of_(), subject).value_()
cmd = self.check_crash_command(
f"search -p -s {address:x} -l {sizeof(subject[0])} 12345678"
)
self.assertRegex(cmd.stdout, rf"(?m)^\s*{address:x}:\s+12345678$")
self.assertIn("search_memory_word(0x12345678)", cmd.drgn_option.stdout)
self.assertIn("physical=True", cmd.drgn_option.stdout)
self.assertEqual(cmd.drgn_option.globals["address"], address)
self.assertEqual(cmd.drgn_option.globals["value"], 0x12345678)
def test_task_stacks(self):
value = self.prog["drgn_test_small_slab_objects"][0].value_()
cmd = self.check_crash_command(f"search -t {value:x}")
# drgn_test_kthread gets truncated to 16 bytes (including the null
# terminator).
self.assertIn("drgn_test_kthre", cmd.stdout)
self.assertIn(f"search_memory_word({value:#x})", cmd.drgn_option.stdout)
self.assertIn("for_each_task(", cmd.drgn_option.stdout)
self.assertIn("set_address_range(stack", cmd.drgn_option.stdout)
self.assertIsInstance(cmd.drgn_option.globals["task"], Object)
def test_active_task_stacks(self):
# We don't have a good way to exercise this, so just test that it runs.
self.check_crash_command("search -T deadbeef")
def test_no_start_or_end(self):
def handler(signum, frame):
raise TimeoutError()
old_handler = signal.signal(signal.SIGALRM, handler)
self.addCleanup(signal.signal, signal.SIGALRM, old_handler)
try:
# We don't want to wait to search all of memory, so just run the
# code for a short time.
signal.setitimer(signal.ITIMER_REAL, 0.1)
self.run_crash_command_drgn_option("search deadbeef")
except TimeoutError:
pass
finally:
signal.setitimer(signal.ITIMER_REAL, 0)
|
