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1"""Test that adding, deleting and modifying watchpoints sends the appropriate events."""
2
3import os, time
4import unittest2
5import lldb
6import lldbutil
7from lldbtest import *
8
9class TestWatchpointEvents (TestBase):
10
11    mydir = os.path.join("functionalities", "watchpoint", "watchpoint_events")
12
13    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
14    @python_api_test
15    @dsym_test
16    def test_with_dsym_and_python_api(self):
17        """Test that adding, deleting and modifying watchpoints sends the appropriate events."""
18        self.buildDsym()
19        self.step_over_stepping()
20
21    @expectedFailureFreeBSD('llvm.org/pr16706') # Watchpoints fail on FreeBSD
22    @python_api_test
23    @dwarf_test
24    def test_with_dwarf_and_python_api(self):
25        """Test that adding, deleting and modifying watchpoints sends the appropriate events."""
26        self.buildDwarf()
27        self.step_over_stepping()
28
29    def setUp(self):
30        # Call super's setUp().
31        TestBase.setUp(self)
32        # Find the line numbers that we will step to in main:
33        self.main_source = "main.c"
34
35    def GetWatchpointEvent (self, event_type):
36        # We added a watchpoint so we should get a watchpoint added event.
37        event = lldb.SBEvent()
38        success = self.listener.WaitForEvent (1, event)
39        self.assertTrue(success == True, "Successfully got watchpoint event")
40        self.assertTrue (lldb.SBWatchpoint.EventIsWatchpointEvent(event), "Event is a watchpoint event.")
41        found_type = lldb.SBWatchpoint.GetWatchpointEventTypeFromEvent (event)
42        self.assertTrue (found_type == event_type, "Event is not correct type, expected: %d, found: %d"%(event_type, found_type))
43        # There shouldn't be another event waiting around:
44        found_event = self.listener.PeekAtNextEventForBroadcasterWithType (self.target_bcast, lldb.SBTarget.eBroadcastBitBreakpointChanged, event)
45        if found_event:
46            print "Found an event I didn't expect: ", event
47
48        self.assertTrue (not found_event, "Only one event per change.")
49
50    def step_over_stepping(self):
51        """Use Python APIs to test stepping over and hitting breakpoints."""
52        exe = os.path.join(os.getcwd(), "a.out")
53
54        target = self.dbg.CreateTarget(exe)
55        self.assertTrue(target, VALID_TARGET)
56
57        self.main_source_spec = lldb.SBFileSpec (self.main_source)
58
59        break_in_main = target.BreakpointCreateBySourceRegex ('// Put a breakpoint here.', self.main_source_spec)
60        self.assertTrue(break_in_main, VALID_BREAKPOINT)
61
62        # Now launch the process, and do not stop at entry point.
63        process = target.LaunchSimple (None, None, os.getcwd())
64
65        self.assertTrue(process, PROCESS_IS_VALID)
66
67        # The stop reason of the thread should be breakpoint.
68        threads = lldbutil.get_threads_stopped_at_breakpoint (process, break_in_main)
69
70        if len(threads) != 1:
71            self.fail ("Failed to stop at first breakpoint in main.")
72
73        thread = threads[0]
74        frame = thread.GetFrameAtIndex(0)
75        local_var = frame.FindVariable ("local_var")
76        self.assertTrue (local_var.IsValid())
77
78        self.listener = lldb.SBListener("com.lldb.testsuite_listener")
79        self.target_bcast = target.GetBroadcaster()
80        self.target_bcast.AddListener (self.listener, lldb.SBTarget.eBroadcastBitWatchpointChanged)
81        self.listener.StartListeningForEvents (self.target_bcast, lldb.SBTarget.eBroadcastBitWatchpointChanged)
82
83        error = lldb.SBError()
84        local_watch = local_var.Watch(True, True, True, error)
85        if not error.Success():
86            self.fail ("Failed to make watchpoint for local_var: %s"%(error.GetCString()))
87
88        self.GetWatchpointEvent (lldb.eWatchpointEventTypeAdded)
89        # Now change some of the features of this watchpoint and make sure we get events:
90        local_watch.SetEnabled(False)
91        self.GetWatchpointEvent (lldb.eWatchpointEventTypeDisabled)
92
93        local_watch.SetIgnoreCount(10)
94        self.GetWatchpointEvent (lldb.eWatchpointEventTypeIgnoreChanged)
95
96        local_watch.SetCondition ("1 == 2")
97        self.GetWatchpointEvent (lldb.eWatchpointEventTypeConditionChanged)
98
99if __name__ == '__main__':
100    import atexit
101    lldb.SBDebugger.Initialize()
102    atexit.register(lambda: lldb.SBDebugger.Terminate())
103    unittest2.main()
104