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1"""
2Use lldb Python SBWatchpoint API to set the ignore count.
3"""
4
5import os, time
6import re
7import unittest2
8import lldb, lldbutil
9from lldbtest import *
10
11class WatchpointIgnoreCountTestCase(TestBase):
12
13    mydir = os.path.join("python_api", "watchpoint")
14
15    def setUp(self):
16        # Call super's setUp().
17        TestBase.setUp(self)
18        # Our simple source filename.
19        self.source = 'main.c'
20        # Find the line number to break inside main().
21        self.line = line_number(self.source, '// Set break point at this line.')
22
23    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
24    @python_api_test
25    @dsym_test
26    def test_set_watch_ignore_count_with_dsym(self):
27        """Test SBWatchpoint.SetIgnoreCount() API."""
28        self.buildDsym()
29        self.do_watchpoint_ignore_count()
30
31    @expectedFailureFreeBSD('llvm.org/pr16706') # Watchpoints fail on FreeBSD
32    @python_api_test
33    @dwarf_test
34    def test_set_watch_ignore_count_with_dwarf(self):
35        """Test SBWatchpoint.SetIgnoreCount() API."""
36        self.buildDwarf()
37        self.do_watchpoint_ignore_count()
38
39    def do_watchpoint_ignore_count(self):
40        """Test SBWatchpoint.SetIgnoreCount() API."""
41        exe = os.path.join(os.getcwd(), "a.out")
42
43        # Create a target by the debugger.
44        target = self.dbg.CreateTarget(exe)
45        self.assertTrue(target, VALID_TARGET)
46
47        # Create a breakpoint on main.c in order to set our watchpoint later.
48        breakpoint = target.BreakpointCreateByLocation(self.source, self.line)
49        self.assertTrue(breakpoint and
50                        breakpoint.GetNumLocations() == 1,
51                        VALID_BREAKPOINT)
52
53        # Now launch the process, and do not stop at the entry point.
54        process = target.LaunchSimple(None, None, os.getcwd())
55
56        # We should be stopped due to the breakpoint.  Get frame #0.
57        process = target.GetProcess()
58        self.assertTrue(process.GetState() == lldb.eStateStopped,
59                        PROCESS_STOPPED)
60        thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
61        frame0 = thread.GetFrameAtIndex(0)
62
63        # Watch 'global' for read and write.
64        value = frame0.FindValue('global', lldb.eValueTypeVariableGlobal)
65        error = lldb.SBError();
66        watchpoint = value.Watch(True, True, True, error)
67        self.assertTrue(value and watchpoint,
68                        "Successfully found the variable and set a watchpoint")
69        self.DebugSBValue(value)
70
71        # Hide stdout if not running with '-t' option.
72        if not self.TraceOn():
73            self.HideStdout()
74
75        # There should be only 1 watchpoint location under the target.
76        self.assertTrue(target.GetNumWatchpoints() == 1)
77        watchpoint = target.GetWatchpointAtIndex(0)
78        self.assertTrue(watchpoint.IsEnabled())
79        self.assertTrue(watchpoint.GetIgnoreCount() == 0)
80        watch_id = watchpoint.GetID()
81        self.assertTrue(watch_id != 0)
82        print watchpoint
83
84        # Now immediately set the ignore count to 2.  When we continue, expect the
85        # inferior to run to its completion without stopping due to watchpoint.
86        watchpoint.SetIgnoreCount(2)
87        print watchpoint
88        process.Continue()
89
90        # At this point, the inferior process should have exited.
91        self.assertTrue(process.GetState() == lldb.eStateExited, PROCESS_EXITED)
92
93        # Verify some vital statistics.
94        self.assertTrue(watchpoint)
95        self.assertTrue(watchpoint.GetWatchSize() == 4)
96        self.assertTrue(watchpoint.GetHitCount() == 2)
97        print watchpoint
98
99
100if __name__ == '__main__':
101    import atexit
102    lldb.SBDebugger.Initialize()
103    atexit.register(lambda: lldb.SBDebugger.Terminate())
104    unittest2.main()
105