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
|
"""Test that lldb functions correctly after the inferior has crashed."""
from __future__ import print_function
import lldb_shared
import os, time
import lldb, lldbutil, lldbplatformutil
from lldbtest import *
class CrashingInferiorTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
@expectedFailureFreeBSD("llvm.org/pr23699 SIGSEGV is reported as exception, not signal")
@expectedFailureWindows("llvm.org/pr24778") # This actually works, but the test relies on the output format instead of the API
def test_inferior_crashing(self):
"""Test that lldb reliably catches the inferior crashing (command)."""
self.build()
self.inferior_crashing()
@expectedFailureWindows("llvm.org/pr24778")
def test_inferior_crashing_register(self):
"""Test that lldb reliably reads registers from the inferior after crashing (command)."""
self.build()
self.inferior_crashing_registers()
@add_test_categories(['pyapi'])
@expectedFailureWindows("llvm.org/pr24778")
def test_inferior_crashing_python(self):
"""Test that lldb reliably catches the inferior crashing (Python API)."""
self.build()
self.inferior_crashing_python()
@expectedFailureWindows("llvm.org/pr24778")
def test_inferior_crashing_expr(self):
"""Test that the lldb expression interpreter can read from the inferior after crashing (command)."""
self.build()
self.inferior_crashing_expr()
@expectedFailureAll("llvm.org/pr23139", oslist=["linux"], compiler="gcc", compiler_version=[">=","4.9"], archs=["i386"])
@expectedFailureWindows("llvm.org/pr24778")
def test_inferior_crashing_step(self):
"""Test that stepping after a crash behaves correctly."""
self.build()
self.inferior_crashing_step()
@expectedFailureFreeBSD('llvm.org/pr24939')
@expectedFailureWindows("llvm.org/pr24778")
@expectedFailureAndroid(archs=['aarch64'], api_levels=list(range(21 + 1))) # No eh_frame for sa_restorer
def test_inferior_crashing_step_after_break(self):
"""Test that lldb functions correctly after stepping through a crash."""
self.build()
self.inferior_crashing_step_after_break()
@expectedFailureWindows("llvm.org/pr24778")
@skipIfLinux # Inferior exits after stepping after a segfault. This is working as intended IMHO.
def test_inferior_crashing_expr_step_and_expr(self):
"""Test that lldb expressions work before and after stepping after a crash."""
self.build()
self.inferior_crashing_expr_step_expr()
def set_breakpoint(self, line):
lldbutil.run_break_set_by_file_and_line (self, "main.c", line, num_expected_locations=1, loc_exact=True)
def check_stop_reason(self):
# We should have one crashing thread
self.assertEqual(
len(lldbutil.get_crashed_threads(self, self.dbg.GetSelectedTarget().GetProcess())),
1,
STOPPED_DUE_TO_EXC_BAD_ACCESS)
def get_api_stop_reason(self):
return lldb.eStopReasonException
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Find the line number of the crash.
self.line = line_number('main.c', '// Crash here.')
def inferior_crashing(self):
"""Inferior crashes upon launching; lldb should catch the event and stop."""
exe = os.path.join(os.getcwd(), "a.out")
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
self.runCmd("run", RUN_SUCCEEDED)
# The exact stop reason depends on the platform
if self.platformIsDarwin():
stop_reason = 'stop reason = EXC_BAD_ACCESS'
elif self.getPlatform() == "linux":
stop_reason = 'stop reason = signal SIGSEGV'
else:
stop_reason = 'stop reason = invalid address'
self.expect("thread list", STOPPED_DUE_TO_EXC_BAD_ACCESS,
substrs = ['stopped',
stop_reason])
# And it should report the correct line number.
self.expect("thread backtrace all",
substrs = [stop_reason,
'main.c:%d' % self.line])
def inferior_crashing_python(self):
"""Inferior crashes upon launching; lldb should catch the event and stop."""
exe = os.path.join(os.getcwd(), "a.out")
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
# Now launch the process, and do not stop at entry point.
# Both argv and envp are null.
process = target.LaunchSimple (None, None, self.get_process_working_directory())
if process.GetState() != lldb.eStateStopped:
self.fail("Process should be in the 'stopped' state, "
"instead the actual state is: '%s'" %
lldbutil.state_type_to_str(process.GetState()))
threads = lldbutil.get_crashed_threads(self, process)
self.assertEqual(len(threads), 1, "Failed to stop the thread upon bad access exception")
if self.TraceOn():
lldbutil.print_stacktrace(threads[0])
def inferior_crashing_registers(self):
"""Test that lldb can read registers after crashing."""
exe = os.path.join(os.getcwd(), "a.out")
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
self.runCmd("run", RUN_SUCCEEDED)
self.check_stop_reason()
# lldb should be able to read from registers from the inferior after crashing.
lldbplatformutil.check_first_register_readable(self)
def inferior_crashing_expr(self):
"""Test that the lldb expression interpreter can read symbols after crashing."""
exe = os.path.join(os.getcwd(), "a.out")
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
self.runCmd("run", RUN_SUCCEEDED)
self.check_stop_reason()
# The lldb expression interpreter should be able to read from addresses of the inferior after a crash.
self.expect("p argc",
startstr = '(int) $0 = 1')
self.expect("p hello_world",
substrs = ['Hello'])
def inferior_crashing_step(self):
"""Test that lldb functions correctly after stepping through a crash."""
exe = os.path.join(os.getcwd(), "a.out")
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
self.set_breakpoint(self.line)
self.runCmd("run", RUN_SUCCEEDED)
self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
substrs = ['main.c:%d' % self.line,
'stop reason = breakpoint'])
self.runCmd("next")
self.check_stop_reason()
# The lldb expression interpreter should be able to read from addresses of the inferior after a crash.
self.expect("p argv[0]",
substrs = ['a.out'])
self.expect("p null_ptr",
substrs = ['= 0x0'])
# lldb should be able to read from registers from the inferior after crashing.
lldbplatformutil.check_first_register_readable(self)
# And it should report the correct line number.
self.expect("thread backtrace all",
substrs = ['main.c:%d' % self.line])
def inferior_crashing_step_after_break(self):
"""Test that lldb behaves correctly when stepping after a crash."""
exe = os.path.join(os.getcwd(), "a.out")
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
self.runCmd("run", RUN_SUCCEEDED)
self.check_stop_reason()
expected_state = 'exited' # Provide the exit code.
if self.platformIsDarwin():
expected_state = 'stopped' # TODO: Determine why 'next' and 'continue' have no effect after a crash.
elif re.match(".*-.*-.*-android", self.dbg.GetSelectedPlatform().GetTriple()):
expected_state = 'stopped' # android has a default SEGV handler, which will re-raise the signal, so we come up stopped again
self.expect("next",
substrs = ['Process', expected_state])
if expected_state == 'exited':
self.expect("thread list", error=True,substrs = ['Process must be launched'])
else:
self.check_stop_reason()
def inferior_crashing_expr_step_expr(self):
"""Test that lldb expressions work before and after stepping after a crash."""
exe = os.path.join(os.getcwd(), "a.out")
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
self.runCmd("run", RUN_SUCCEEDED)
self.check_stop_reason()
# The lldb expression interpreter should be able to read from addresses of the inferior after a crash.
self.expect("p argv[0]",
substrs = ['a.out'])
self.runCmd("next")
self.check_stop_reason()
# The lldb expression interpreter should be able to read from addresses of the inferior after a crash.
self.expect("p argv[0]",
substrs = ['a.out'])
|
