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1"""Test lldb reloads the inferior after it was changed during the session."""
2
3import os, time
4import unittest2
5import lldb
6from lldbtest import *
7import lldbutil
8
9class ChangedInferiorTestCase(TestBase):
10
11    mydir = os.path.join("functionalities", "inferior-changed")
12
13    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
14    def test_inferior_crashing_dsym(self):
15        """Test lldb reloads the inferior after it was changed during the session."""
16        self.buildDsym()
17        self.inferior_crashing()
18        self.cleanup()
19        d = {'C_SOURCES': 'main2.c'}
20        self.buildDsym(dictionary=d)
21        self.setTearDownCleanup(dictionary=d)
22        self.inferior_not_crashing()
23
24    def test_inferior_crashing_dwarf(self):
25        """Test lldb reloads the inferior after it was changed during the session."""
26        self.buildDwarf()
27        self.inferior_crashing()
28        self.cleanup()
29        # lldb needs to recognize the inferior has changed. If lldb needs to check the
30        # new module timestamp, make sure it is not the same as the old one, so add a
31        # 1 second delay.
32        time.sleep(1)
33        d = {'C_SOURCES': 'main2.c'}
34        self.buildDwarf(dictionary=d)
35        self.setTearDownCleanup(dictionary=d)
36        self.inferior_not_crashing()
37
38    def setUp(self):
39        # Call super's setUp().
40        TestBase.setUp(self)
41        # Find the line number of the crash.
42        self.line1 = line_number('main.c', '// Crash here.')
43        self.line2 = line_number('main2.c', '// Not crash here.')
44
45    def inferior_crashing(self):
46        """Inferior crashes upon launching; lldb should catch the event and stop."""
47        exe = os.path.join(os.getcwd(), "a.out")
48        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
49
50        self.runCmd("run", RUN_SUCCEEDED)
51
52        if sys.platform.startswith("darwin"):
53            stop_reason = 'stop reason = EXC_BAD_ACCESS'
54        else:
55            stop_reason = 'stop reason = invalid address'
56
57        # The stop reason of the thread should be a bad access exception.
58        self.expect("thread list", STOPPED_DUE_TO_EXC_BAD_ACCESS,
59            substrs = ['stopped',
60                       stop_reason])
61
62        # And it should report the correct line number.
63        self.expect("thread backtrace all",
64            substrs = [stop_reason,
65                       'main.c:%d' % self.line1])
66
67    def inferior_not_crashing(self):
68        """Test lldb reloads the inferior after it was changed during the session."""
69        self.runCmd("process kill")
70        self.runCmd("run", RUN_SUCCEEDED)
71        self.runCmd("process status")
72
73        if sys.platform.startswith("darwin"):
74            stop_reason = 'EXC_BAD_ACCESS'
75        else:
76            stop_reason = 'invalid address'
77
78        if stop_reason in self.res.GetOutput():
79            self.fail("Inferior changed, but lldb did not perform a reload")
80
81        # Break inside the main.
82        lldbutil.run_break_set_by_file_and_line (self, "main2.c", self.line2, num_expected_locations=1, loc_exact=True)
83
84        self.runCmd("run", RUN_SUCCEEDED)
85
86        # The stop reason of the thread should be breakpoint.
87        self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
88            substrs = ['stopped',
89                       'stop reason = breakpoint'])
90
91        self.runCmd("frame variable int_ptr")
92        self.expect("frame variable *int_ptr",
93            substrs = ['= 7'])
94        self.expect("expression *int_ptr",
95            substrs = ['= 7'])
96
97
98if __name__ == '__main__':
99    import atexit
100    lldb.SBDebugger.Initialize()
101    atexit.register(lambda: lldb.SBDebugger.Terminate())
102    unittest2.main()
103