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150
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1 """Test that we handle inferiors which change their process group"""
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2
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3
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4
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5 import os
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6 import lldb
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7 from lldbsuite.test.decorators import *
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8 from lldbsuite.test.lldbtest import *
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9 from lldbsuite.test import lldbutil
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10
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11
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12 class ChangeProcessGroupTestCase(TestBase):
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13
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14 mydir = TestBase.compute_mydir(__file__)
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15 NO_DEBUG_INFO_TESTCASE = True
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16
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17 def setUp(self):
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18 # Call super's setUp().
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19 TestBase.setUp(self)
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20 # Find the line number to break for main.c.
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21 self.line = line_number('main.c', '// Set breakpoint here')
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22
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23 @skipIfFreeBSD # Times out on FreeBSD llvm.org/pr23731
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24 @skipIfWindows # setpgid call does not exist on Windows
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25 @expectedFailureAndroid("http://llvm.org/pr23762", api_levels=[16])
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26 @expectedFailureNetBSD
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27 def test_setpgid(self):
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28 self.build()
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29 exe = self.getBuildArtifact("a.out")
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30
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31 # Use a file as a synchronization point between test and inferior.
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32 pid_file_path = lldbutil.append_to_process_working_directory(self,
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33 "pid_file_%d" % (int(time.time())))
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34 self.addTearDownHook(
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35 lambda: self.run_platform_command(
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36 "rm %s" %
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37 (pid_file_path)))
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38
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39 popen = self.spawnSubprocess(exe, [pid_file_path])
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40 self.addTearDownHook(self.cleanupSubprocesses)
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41
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42 pid = lldbutil.wait_for_file_on_target(self, pid_file_path)
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43
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44 # make sure we cleanup the forked child also
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45 def cleanupChild():
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46 if lldb.remote_platform:
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47 lldb.remote_platform.Kill(int(pid))
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48 else:
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49 if os.path.exists("/proc/" + pid):
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50 os.kill(int(pid), signal.SIGKILL)
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51 self.addTearDownHook(cleanupChild)
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52
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53 # Create a target by the debugger.
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54 target = self.dbg.CreateTarget(exe)
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55 self.assertTrue(target, VALID_TARGET)
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56
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57 listener = lldb.SBListener("my.attach.listener")
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58 error = lldb.SBError()
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59 process = target.AttachToProcessWithID(listener, int(pid), error)
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60 self.assertTrue(error.Success() and process, PROCESS_IS_VALID)
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61
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62 # set a breakpoint just before the setpgid() call
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63 lldbutil.run_break_set_by_file_and_line(
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64 self, 'main.c', self.line, num_expected_locations=-1)
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65
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66 thread = process.GetSelectedThread()
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67
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68 # release the child from its loop
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69 value = thread.GetSelectedFrame().EvaluateExpression("release_child_flag = 1")
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173
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70 self.assertTrue(value.IsValid())
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71 self.assertEquals(value.GetValueAsUnsigned(0), 1)
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150
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72 process.Continue()
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73
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74 # make sure the child's process group id is different from its pid
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75 value = thread.GetSelectedFrame().EvaluateExpression("(int)getpgid(0)")
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76 self.assertTrue(value.IsValid())
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77 self.assertNotEqual(value.GetValueAsUnsigned(0), int(pid))
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78
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79 # step over the setpgid() call
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80 thread.StepOver()
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81 self.assertEqual(thread.GetStopReason(), lldb.eStopReasonPlanComplete)
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82
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83 # verify that the process group has been set correctly
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84 # this also checks that we are still in full control of the child
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85 value = thread.GetSelectedFrame().EvaluateExpression("(int)getpgid(0)")
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86 self.assertTrue(value.IsValid())
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87 self.assertEqual(value.GetValueAsUnsigned(0), int(pid))
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88
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89 # run to completion
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90 process.Continue()
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91 self.assertEqual(process.GetState(), lldb.eStateExited)
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