lldb/test/API/lang/c/stepping/TestThreadStepping.py

   1 """
   2 Test thread stepping features in combination with frame select.
   3 """
   4
   5
   6 import lldb
   7 from lldbsuite.test.lldbtest import *
   8 import lldbsuite.test.lldbutil as lldbutil
   9
  10
  11 class ThreadSteppingTestCase(TestBase):
  12     def setUp(self):
  13         # Call super's setUp().
  14         TestBase.setUp(self)
  15         # Find the line number to of function 'c'.
  16         self.line1 = line_number(
  17             "main.c", '// Find the line number of function "c" here.'
  18         )
  19         self.line2 = line_number(
  20             "main.c", '// frame select 2, thread step-out while stopped at "c(1)"'
  21         )
  22         self.line3 = line_number("main.c", '// thread step-out while stopped at "c(2)"')
  23         self.line4 = line_number(
  24             "main.c", '// frame select 1, thread step-out while stopped at "c(3)"'
  25         )
  26
  27     def test_step_out_with_run_command(self):
  28         """Exercise thread step-out and frame select followed by thread step-out."""
  29         self.build()
  30         exe = self.getBuildArtifact("a.out")
  31         self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
  32
  33         # Create a breakpoint inside function 'c'.
  34         lldbutil.run_break_set_by_file_and_line(
  35             self, "main.c", self.line1, num_expected_locations=1, loc_exact=True
  36         )
  37
  38         # Now run the program.
  39         self.runCmd("run", RUN_SUCCEEDED)
  40
  41         # The process should be stopped at this point.
  42         self.expect("process status", PROCESS_STOPPED, patterns=["Process .* stopped"])
  43
  44         # The frame #0 should correspond to main.c:32, the executable statement
  45         # in function name 'c'.  And frame #3 should point to main.c:37.
  46         self.expect(
  47             "thread backtrace",
  48             STOPPED_DUE_TO_BREAKPOINT,
  49             substrs=["stop reason = breakpoint"],
  50             patterns=[
  51                 "frame #0.*main.c:%d" % self.line1,
  52                 "frame #3.*main.c:%d" % self.line2,
  53             ],
  54         )
  55
  56         # We want to move the pc to frame #3.  This can be accomplished by
  57         # 'frame select 2', followed by 'thread step-out'.
  58         self.runCmd("frame select 2")
  59         self.runCmd("thread step-out")
  60         self.expect(
  61             "thread backtrace",
  62             STEP_OUT_SUCCEEDED,
  63             substrs=["stop reason = step out"],
  64             patterns=["frame #0.*main.c:%d" % self.line2],
  65         )
  66
  67         # Let's move on to a single step-out case.
  68         self.runCmd("process continue")
  69
  70         # The process should be stopped at this point.
  71         self.expect("process status", PROCESS_STOPPED, patterns=["Process .* stopped"])
  72         self.runCmd("thread step-out")
  73         self.expect(
  74             "thread backtrace",
  75             STEP_OUT_SUCCEEDED,
  76             substrs=["stop reason = step out"],
  77             patterns=["frame #0.*main.c:%d" % self.line3],
  78         )
  79
  80         # Do another frame selct, followed by thread step-out.
  81         self.runCmd("process continue")
  82
  83         # The process should be stopped at this point.
  84         self.expect("process status", PROCESS_STOPPED, patterns=["Process .* stopped"])
  85         self.runCmd("frame select 1")
  86         self.runCmd("thread step-out")
  87         self.expect(
  88             "thread backtrace",
  89             STEP_OUT_SUCCEEDED,
  90             substrs=["stop reason = step out"],
  91             patterns=["frame #0.*main.c:%d" % self.line4],
  92         )