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1"""
2Test that expr will time out and allow other threads to run if it blocks.
3"""
4
5import os, time
6import re
7import unittest2
8import lldb, lldbutil
9from lldbtest import *
10
11class ExprDoesntDeadlockTestCase(TestBase):
12
13    def getCategories(self):
14        return ['basic_process']
15
16    mydir = os.path.join("functionalities", "expr-doesnt-deadlock")
17
18    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
19    @dsym_test
20    def test_with_dsym_and_run_command(self):
21        """Test that expr will time out and allow other threads to run if it blocks - with dsym."""
22        self.buildDsym()
23        self.expr_doesnt_deadlock()
24
25    @dwarf_test
26    @skipIfLinux # llvm.org/pr15258: disabled due to assertion failure in ProcessMonitor::GetCrashReasonForSIGSEGV:
27    def test_with_dwarf_and_run_command(self):
28        """Test that expr will time out and allow other threads to run if it blocks."""
29        self.buildDwarf()
30        self.expr_doesnt_deadlock()
31
32    def setUp(self):
33        # Call super's setUp().
34        TestBase.setUp(self)
35
36    def expr_doesnt_deadlock (self):
37        """Test that expr will time out and allow other threads to run if it blocks."""
38        exe = os.path.join(os.getcwd(), "a.out")
39
40        # Create a target by the debugger.
41        target = self.dbg.CreateTarget(exe)
42        self.assertTrue(target, VALID_TARGET)
43
44        # Now create a breakpoint at source line before call_me_to_get_lock gets called.
45
46        main_file_spec = lldb.SBFileSpec ("locking.c")
47        breakpoint = target.BreakpointCreateBySourceRegex('Break here', main_file_spec)
48        if self.TraceOn():
49            print "breakpoint:", breakpoint
50        self.assertTrue(breakpoint and
51                        breakpoint.GetNumLocations() == 1,
52                        VALID_BREAKPOINT)
53
54        # Now launch the process, and do not stop at entry point.
55        process = target.LaunchSimple(None, None, os.getcwd())
56        self.assertTrue(process, PROCESS_IS_VALID)
57
58        # Frame #0 should be on self.line1 and the break condition should hold.
59        from lldbutil import get_stopped_thread
60        thread = get_stopped_thread(process, lldb.eStopReasonBreakpoint)
61        self.assertTrue(thread.IsValid(), "There should be a thread stopped due to breakpoint condition")
62
63        frame0 = thread.GetFrameAtIndex(0)
64
65        var = frame0.EvaluateExpression ("call_me_to_get_lock()")
66        self.assertTrue (var.IsValid())
67        self.assertTrue (var.GetValueAsSigned (0) == 567)
68
69if __name__ == '__main__':
70    import atexit
71    lldb.SBDebugger.Initialize()
72    atexit.register(lambda: lldb.SBDebugger.Terminate())
73    unittest2.main()
74