artulab.com Git - openbsd/blob

   1 """
   2 Test SB API support for identifying artificial (tail call) frames.
   3 """
   4
   5 import lldb
   6 import lldbsuite.test.lldbutil as lldbutil
   7 from lldbsuite.test.decorators import *
   8 from lldbsuite.test.lldbtest import *
   9
  10 class TestArtificialFrameThreadStepOut1(TestBase):
  11     mydir = TestBase.compute_mydir(__file__)
  12
  13     # If your test case doesn't stress debug info, the
  14     # set this to true.  That way it won't be run once for
  15     # each debug info format.
  16     NO_DEBUG_INFO_TESTCASE = True
  17
  18     def prepare_thread(self):
  19         exe = self.getBuildArtifact("a.out")
  20
  21         # Create a target by the debugger.
  22         target = self.dbg.CreateTarget(exe)
  23         self.assertTrue(target, VALID_TARGET)
  24
  25         breakpoint = target.BreakpointCreateBySourceRegex("break here",
  26                 lldb.SBFileSpec("main.cpp"))
  27         self.assertTrue(breakpoint and
  28                         breakpoint.GetNumLocations() == 1,
  29                         VALID_BREAKPOINT)
  30
  31         error = lldb.SBError()
  32         launch_info = lldb.SBLaunchInfo(None)
  33         process = target.Launch(launch_info, error)
  34         self.assertTrue(process, PROCESS_IS_VALID)
  35
  36         # Did we hit our breakpoint?
  37         threads = lldbutil.get_threads_stopped_at_breakpoint(process,
  38                 breakpoint)
  39         self.assertEqual(
  40             len(threads), 1,
  41             "There should be a thread stopped at our breakpoint")
  42
  43         self.assertEqual(breakpoint.GetHitCount(), 1)
  44
  45         thread = threads[0]
  46
  47         # Here's what we expect to see in the backtrace:
  48         #   frame #0: ... a.out`sink() at main.cpp:13:4 [opt]
  49         #   frame #1: ... a.out`func3() at main.cpp:14:1 [opt] [artificial]
  50         #   frame #2: ... a.out`func2() at main.cpp:18:62 [opt]
  51         #   frame #3: ... a.out`func1() at main.cpp:18:85 [opt] [artificial]
  52         #   frame #4: ... a.out`main at main.cpp:23:3 [opt]
  53         return thread
  54
  55     @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr26265")
  56     def test_stepping_out_past_artificial_frame(self):
  57         self.build()
  58         thread = self.prepare_thread()
  59
  60         # Frame #0's ancestor is artificial. Stepping out should move to
  61         # frame #2, because we behave as-if artificial frames were not present.
  62         thread.StepOut()
  63         frame2 = thread.GetSelectedFrame()
  64         self.assertEqual(frame2.GetDisplayFunctionName(), "func2()")
  65         self.assertFalse(frame2.IsArtificial())
  66
  67         # Ditto: stepping out of frame #2 should move to frame #4.
  68         thread.StepOut()
  69         frame4 = thread.GetSelectedFrame()
  70         self.assertEqual(frame4.GetDisplayFunctionName(), "main")
  71         self.assertFalse(frame2.IsArtificial())
  72
  73     @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr26265")
  74     def test_return_past_artificial_frame(self):
  75         self.build()
  76         thread = self.prepare_thread()
  77
  78         value = lldb.SBValue()
  79
  80         # Frame #0's ancestor is artificial. Returning from frame #0 should move
  81         # to frame #2.
  82         thread.ReturnFromFrame(thread.GetSelectedFrame(), value)
  83         frame2 = thread.GetSelectedFrame()
  84         self.assertEqual(frame2.GetDisplayFunctionName(), "func2()")
  85         self.assertFalse(frame2.IsArtificial())
  86
  87         # Ditto: stepping out of frame #2 should move to frame #4.
  88         thread.ReturnFromFrame(thread.GetSelectedFrame(), value)
  89         frame4 = thread.GetSelectedFrame()
  90         self.assertEqual(frame4.GetDisplayFunctionName(), "main")
  91         self.assertFalse(frame2.IsArtificial())
  92