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   1 """
   2 Test that breakpoints do not affect stepping.
   3 Check for correct StopReason when stepping to the line with breakpoint
   4 which chould be eStopReasonBreakpoint in general,
   5 and eStopReasonPlanComplete when breakpoint's condition fails.
   6 """
   7
   8
   9 import unittest2
  10 import lldb
  11 from lldbsuite.test.decorators import *
  12 from lldbsuite.test.lldbtest import *
  13 from lldbsuite.test import lldbutil
  14
  15 class StepOverBreakpointsTestCase(TestBase):
  16
  17     mydir = TestBase.compute_mydir(__file__)
  18
  19     def setUp(self):
  20         TestBase.setUp(self)
  21
  22         self.build()
  23         exe = self.getBuildArtifact("a.out")
  24         src = lldb.SBFileSpec("main.cpp")
  25
  26         # Create a target by the debugger.
  27         self.target = self.dbg.CreateTarget(exe)
  28         self.assertTrue(self.target, VALID_TARGET)
  29
  30         # Setup four breakpoints, two of them with false condition
  31         self.line1 = line_number('main.cpp', "breakpoint_1")
  32         self.line4 = line_number('main.cpp', "breakpoint_4")
  33
  34         self.breakpoint1 = self.target.BreakpointCreateByLocation(src, self.line1)
  35         self.assertTrue(
  36             self.breakpoint1 and self.breakpoint1.GetNumLocations() == 1,
  37             VALID_BREAKPOINT)
  38
  39         self.breakpoint2 = self.target.BreakpointCreateBySourceRegex("breakpoint_2", src)
  40         self.breakpoint2.GetLocationAtIndex(0).SetCondition('false')
  41
  42         self.breakpoint3 = self.target.BreakpointCreateBySourceRegex("breakpoint_3", src)
  43         self.breakpoint3.GetLocationAtIndex(0).SetCondition('false')
  44
  45         self.breakpoint4 = self.target.BreakpointCreateByLocation(src, self.line4)
  46
  47         # Start debugging
  48         self.process = self.target.LaunchSimple(
  49             None, None, self.get_process_working_directory())
  50         self.assertIsNotNone(self.process, PROCESS_IS_VALID)
  51         self.thread = lldbutil.get_one_thread_stopped_at_breakpoint(self.process, self.breakpoint1)
  52         self.assertIsNotNone(self.thread, "Didn't stop at breakpoint 1.")
  53
  54     def test_step_instruction(self):
  55         # Count instructions between breakpoint_1 and breakpoint_4
  56         contextList = self.target.FindFunctions('main', lldb.eFunctionNameTypeAuto)
  57         self.assertEquals(contextList.GetSize(), 1)
  58         symbolContext = contextList.GetContextAtIndex(0)
  59         function = symbolContext.GetFunction()
  60         self.assertTrue(function)
  61         instructions = function.GetInstructions(self.target)
  62         addr_1 = self.breakpoint1.GetLocationAtIndex(0).GetAddress()
  63         addr_4 = self.breakpoint4.GetLocationAtIndex(0).GetAddress()
  64
  65         # if third argument is true then the count will be the number of
  66         # instructions on which a breakpoint can be set.
  67         # start = addr_1, end = addr_4, canSetBreakpoint = True
  68         steps_expected = instructions.GetInstructionsCount(addr_1, addr_4, True)
  69         step_count = 0
  70         # Step from breakpoint_1 to breakpoint_4
  71         while True:
  72             self.thread.StepInstruction(True)
  73             step_count = step_count + 1
  74             self.assertEquals(self.process.GetState(), lldb.eStateStopped)
  75             self.assertTrue(self.thread.GetStopReason() == lldb.eStopReasonPlanComplete or
  76                             self.thread.GetStopReason() == lldb.eStopReasonBreakpoint)
  77             if (self.thread.GetStopReason() == lldb.eStopReasonBreakpoint) :
  78                 # we should not stop on breakpoint_2 and _3 because they have false condition
  79                 self.assertEquals(self.thread.GetFrameAtIndex(0).GetLineEntry().GetLine(), self.line4)
  80                 # breakpoint_2 and _3 should not affect step count
  81                 self.assertTrue(step_count >= steps_expected)
  82                 break
  83
  84         # Run the process until termination
  85         self.process.Continue()
  86         self.assertEquals(self.process.GetState(), lldb.eStateExited)
  87
  88     @skipIf(bugnumber="llvm.org/pr31972", hostoslist=["windows"])
  89     def test_step_over(self):
  90         #lldb.DBG.EnableLog("lldb", ["step","breakpoint"])
  91
  92         self.thread.StepOver()
  93         # We should be stopped at the breakpoint_2 line with stop plan complete reason
  94         self.assertEquals(self.process.GetState(), lldb.eStateStopped)
  95         self.assertEquals(self.thread.GetStopReason(), lldb.eStopReasonPlanComplete)
  96
  97         self.thread.StepOver()
  98         # We should be stopped at the breakpoint_3 line with stop plan complete reason
  99         self.assertEquals(self.process.GetState(), lldb.eStateStopped)
 100         self.assertEquals(self.thread.GetStopReason(), lldb.eStopReasonPlanComplete)
 101
 102         self.thread.StepOver()
 103         # We should be stopped at the breakpoint_4
 104         self.assertEquals(self.process.GetState(), lldb.eStateStopped)
 105         self.assertEquals(self.thread.GetStopReason(), lldb.eStopReasonBreakpoint)
 106         thread1 = lldbutil.get_one_thread_stopped_at_breakpoint(self.process, self.breakpoint4)
 107         self.assertEquals(self.thread, thread1, "Didn't stop at breakpoint 4.")
 108
 109         # Check that stepping does not affect breakpoint's hit count
 110         self.assertEquals(self.breakpoint1.GetHitCount(), 1)
 111         self.assertEquals(self.breakpoint2.GetHitCount(), 0)
 112         self.assertEquals(self.breakpoint3.GetHitCount(), 0)
 113         self.assertEquals(self.breakpoint4.GetHitCount(), 1)
 114
 115         # Run the process until termination
 116         self.process.Continue()
 117         self.assertEquals(self.process.GetState(), lldb.eStateExited)
 118