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 TestTailCallFrameSBAPI(TestBase):
  11     mydir = TestBase.compute_mydir(__file__)
  12
  13     @skipIf(compiler="clang", compiler_version=['<', '8.0'])
  14     @skipIf(dwarf_version=['<', '4'])
  15     @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr26265")
  16     def test_tail_call_frame_sbapi(self):
  17         self.build()
  18         self.do_test()
  19
  20     def do_test(self):
  21         exe = self.getBuildArtifact("a.out")
  22
  23         # Create a target by the debugger.
  24         target = self.dbg.CreateTarget(exe)
  25         self.assertTrue(target, VALID_TARGET)
  26
  27         breakpoint = target.BreakpointCreateBySourceRegex("break here",
  28                 lldb.SBFileSpec("main.cpp"))
  29         self.assertTrue(breakpoint and
  30                         breakpoint.GetNumLocations() == 1,
  31                         VALID_BREAKPOINT)
  32
  33         error = lldb.SBError()
  34         launch_info = lldb.SBLaunchInfo(None)
  35         process = target.Launch(launch_info, error)
  36         self.assertTrue(process, PROCESS_IS_VALID)
  37
  38         # Did we hit our breakpoint?
  39         threads = lldbutil.get_threads_stopped_at_breakpoint(process,
  40                 breakpoint)
  41         self.assertEqual(
  42             len(threads), 1,
  43             "There should be a thread stopped at our breakpoint")
  44
  45         self.assertEqual(breakpoint.GetHitCount(), 1)
  46
  47         thread = threads[0]
  48
  49         # Here's what we expect to see in the backtrace:
  50         #   frame #0: ... a.out`sink() at main.cpp:13:4 [opt]
  51         #   frame #1: ... a.out`func3() at main.cpp:14:1 [opt] [artificial]
  52         #   frame #2: ... a.out`func2() at main.cpp:18:62 [opt]
  53         #   frame #3: ... a.out`func1() at main.cpp:18:85 [opt] [artificial]
  54         #   frame #4: ... a.out`main at main.cpp:23:3 [opt]
  55         names = ["sink", "func3", "func2", "func1", "main"]
  56         artificiality = [False, True, False, True, False]
  57         for idx, (name, is_artificial) in enumerate(zip(names, artificiality)):
  58             frame = thread.GetFrameAtIndex(idx)
  59
  60             # Use a relaxed substring check because function dislpay names are
  61             # platform-dependent. E.g we see "void sink(void)" on Windows, but
  62             # "sink()" on Darwin. This seems like a bug -- just work around it
  63             # for now.
  64             self.assertTrue(name in frame.GetDisplayFunctionName())
  65             self.assertEqual(frame.IsArtificial(), is_artificial)