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
|
"""Test that we handle inferiors which change their process group"""
from __future__ import print_function
import os
import lldb
from lldbsuite.test.lldbtest import *
import lldbsuite.test.lldbutil as lldbutil
class ChangeProcessGroupTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Find the line number to break for main.c.
self.line = line_number('main.c', '// Set breakpoint here')
@skipIfFreeBSD # Times out on FreeBSD llvm.org/pr23731
@skipIfWindows # setpgid call does not exist on Windows
@expectedFailureAndroid("http://llvm.org/pr23762", api_levels=[16])
def test_setpgid(self):
self.build()
exe = os.path.join(os.getcwd(), 'a.out')
# Use a file as a synchronization point between test and inferior.
pid_file_path = lldbutil.append_to_process_working_directory(
"pid_file_%d" % (int(time.time())))
self.addTearDownHook(lambda: self.run_platform_command("rm %s" % (pid_file_path)))
popen = self.spawnSubprocess(exe, [pid_file_path])
self.addTearDownHook(self.cleanupSubprocesses)
max_attempts = 5
for i in range(max_attempts):
err, retcode, msg = self.run_platform_command("ls %s" % pid_file_path)
if err.Success() and retcode == 0:
break
else:
print(msg)
if i < max_attempts:
# Exponential backoff!
time.sleep(pow(2, i) * 0.25)
else:
self.fail("Child PID file %s not found even after %d attempts." % (pid_file_path, max_attempts))
err, retcode, pid = self.run_platform_command("cat %s" % (pid_file_path))
self.assertTrue(err.Success() and retcode == 0,
"Failed to read file %s: %s, retcode: %d" % (pid_file_path, err.GetCString(), retcode))
# make sure we cleanup the forked child also
def cleanupChild():
if lldb.remote_platform:
lldb.remote_platform.Kill(int(pid))
else:
if os.path.exists("/proc/" + pid):
os.kill(int(pid), signal.SIGKILL)
self.addTearDownHook(cleanupChild)
# Create a target by the debugger.
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
listener = lldb.SBListener("my.attach.listener")
error = lldb.SBError()
process = target.AttachToProcessWithID(listener, int(pid), error)
self.assertTrue(error.Success() and process, PROCESS_IS_VALID)
# set a breakpoint just before the setpgid() call
lldbutil.run_break_set_by_file_and_line(self, 'main.c', self.line, num_expected_locations=-1)
thread = process.GetSelectedThread()
# release the child from its loop
value = thread.GetSelectedFrame().EvaluateExpression("release_child_flag = 1")
self.assertTrue(value.IsValid() and value.GetValueAsUnsigned(0) == 1);
process.Continue()
# make sure the child's process group id is different from its pid
value = thread.GetSelectedFrame().EvaluateExpression("(int)getpgid(0)")
self.assertTrue(value.IsValid())
self.assertNotEqual(value.GetValueAsUnsigned(0), int(pid));
# step over the setpgid() call
thread.StepOver()
self.assertEqual(thread.GetStopReason(), lldb.eStopReasonPlanComplete)
# verify that the process group has been set correctly
# this also checks that we are still in full control of the child
value = thread.GetSelectedFrame().EvaluateExpression("(int)getpgid(0)")
self.assertTrue(value.IsValid())
self.assertEqual(value.GetValueAsUnsigned(0), int(pid));
# run to completion
process.Continue()
self.assertEqual(process.GetState(), lldb.eStateExited)
def run_platform_command(self, cmd):
platform = self.dbg.GetSelectedPlatform()
shell_command = lldb.SBPlatformShellCommand(cmd)
err = platform.Run(shell_command)
return (err, shell_command.GetStatus(), shell_command.GetOutput())
|
