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   1 """
   2 Test that we handle breakpoints on consecutive instructions correctly.
   3 """
   4
   5
   6
   7 import unittest2
   8 import lldb
   9 from lldbsuite.test.decorators import *
  10 from lldbsuite.test.lldbtest import *
  11 from lldbsuite.test import lldbutil
  12
  13
  14 class ConsecutiveBreakpointsTestCase(TestBase):
  15
  16     mydir = TestBase.compute_mydir(__file__)
  17
  18     def prepare_test(self):
  19         self.build()
  20
  21         (self.target, self.process, self.thread, bkpt) = lldbutil.run_to_source_breakpoint(
  22                 self, "Set breakpoint here", lldb.SBFileSpec("main.cpp"))
  23
  24         # Set breakpoint to the next instruction
  25         frame = self.thread.GetFrameAtIndex(0)
  26
  27         address = frame.GetPCAddress()
  28         instructions = self.target.ReadInstructions(address, 2)
  29         self.assertTrue(len(instructions) == 2)
  30         self.bkpt_address = instructions[1].GetAddress()
  31         self.breakpoint2 = self.target.BreakpointCreateByAddress(
  32             self.bkpt_address.GetLoadAddress(self.target))
  33         self.assertTrue(
  34             self.breakpoint2 and self.breakpoint2.GetNumLocations() == 1,
  35             VALID_BREAKPOINT)
  36
  37     def finish_test(self):
  38         # Run the process until termination
  39         self.process.Continue()
  40         self.assertEquals(self.process.GetState(), lldb.eStateExited)
  41
  42     @no_debug_info_test
  43     def test_continue(self):
  44         """Test that continue stops at the second breakpoint."""
  45         self.prepare_test()
  46
  47         self.process.Continue()
  48         self.assertEquals(self.process.GetState(), lldb.eStateStopped)
  49         # We should be stopped at the second breakpoint
  50         self.thread = lldbutil.get_one_thread_stopped_at_breakpoint(
  51             self.process, self.breakpoint2)
  52         self.assertIsNotNone(
  53             self.thread,
  54             "Expected one thread to be stopped at breakpoint 2")
  55
  56         self.finish_test()
  57
  58     @no_debug_info_test
  59     def test_single_step(self):
  60         """Test that single step stops at the second breakpoint."""
  61         self.prepare_test()
  62
  63         step_over = False
  64         self.thread.StepInstruction(step_over)
  65
  66         self.assertEquals(self.process.GetState(), lldb.eStateStopped)
  67         self.assertEquals(
  68             self.thread.GetFrameAtIndex(0).GetPCAddress().GetLoadAddress(
  69                 self.target), self.bkpt_address.GetLoadAddress(
  70                 self.target))
  71         self.thread = lldbutil.get_one_thread_stopped_at_breakpoint(
  72             self.process, self.breakpoint2)
  73         self.assertIsNotNone(
  74             self.thread,
  75             "Expected one thread to be stopped at breakpoint 2")
  76
  77         self.finish_test()
  78
  79     @no_debug_info_test
  80     def test_single_step_thread_specific(self):
  81         """Test that single step stops, even though the second breakpoint is not valid."""
  82         self.prepare_test()
  83
  84         # Choose a thread other than the current one. A non-existing thread is
  85         # fine.
  86         thread_index = self.process.GetNumThreads() + 1
  87         self.assertFalse(self.process.GetThreadAtIndex(thread_index).IsValid())
  88         self.breakpoint2.SetThreadIndex(thread_index)
  89
  90         step_over = False
  91         self.thread.StepInstruction(step_over)
  92
  93         self.assertEquals(self.process.GetState(), lldb.eStateStopped)
  94         self.assertEquals(
  95             self.thread.GetFrameAtIndex(0).GetPCAddress().GetLoadAddress(
  96                 self.target), self.bkpt_address.GetLoadAddress(
  97                 self.target))
  98         self.assertEquals(
  99             self.thread.GetStopReason(),
 100             lldb.eStopReasonPlanComplete,
 101             "Stop reason should be 'plan complete'")
 102
 103         self.finish_test()